Plastic composite pipe facilitating interfacing
By setting external and internal snap-fit structures and reinforcing ribs on the inner end of the plastic composite pipe, combined with annular seals, the stability and strength problems at the joint of the plastic composite pipe are solved, and a stable connection under external pressure and impact is achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHANGCHUN EAST PETROLEUM TECHNOLOGY SERVICE CO LTD
- Filing Date
- 2025-10-09
- Publication Date
- 2026-07-21
Smart Images
Figure CN224533819U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of plastic composite pipe technology, and in particular to a plastic composite pipe that is easy to connect. Background Technology
[0002] The descriptions in this section provide only background information relevant to this disclosure and do not constitute prior art.
[0003] Plastic pipes have limited performance, so plastic composite pipes are designed to improve product performance. The connection between two plastic composite pipes often aims for speed and ease of assembly, which has led to the development of snap-fit pipe connections. Although these requirements are met, the strength and stability of the connection point cannot be guaranteed, and it is prone to damage and leakage under external pressure and impact. Utility Model Content
[0004] The purpose of this utility model is to provide a plastic composite pipe that is easy to connect. The inner and outer sides of the inner ends of the first pipe and the second pipe are respectively snapped together, which improves the stability and strength of the two after the snapping. It solves the technical problem that the strength and stability of the pipe connection in the snapping method cannot be guaranteed, and damage and leakage are easy to occur under external pressure and impact.
[0005] This utility model provides a plastic composite pipe that is easy to connect, comprising: The first and second pipes are fitted with an outer snap-fit structure between the inner ends of the outer walls on both sides. The inner end of the second pipe is fixedly fitted with one end of an annular seal, and the other end of the seal is attached to the inner end face of the first pipe. The first and second pipes are provided with a reinforcing rib layer in the middle; An inner snap-fit structure is assembled between the reinforcing ribs at the inner ends of the first and second pipes.
[0006] As a further optimization, in order to achieve the snap-fit fixation of the inner sides of the first and second pipes and facilitate disassembly, the inner snap-fit structure includes: The left side connecting crossbar is fixedly connected to the right end of the reinforcing rib layer of the first pipe; A spherical clip is fixedly fitted to the right end of the left connecting crossbar. The right side connecting crossbar is fixedly connected to the left end of the reinforcing rib layer of the second pipe; The left end of the right connecting crossbar is fixedly fitted with a snap-fit ball corresponding to the spherical clip head; The snap-fit ball is snapped into the corresponding spherical snap-fit head.
[0007] As a further optimization, in order to push the snap-fit ball through the opening at the right end of the elastic metal cover and open the strip-shaped notch on the outer wall of the elastic metal cover, so that the snap-fit ball can enter the spherical snap-fit cavity, and then the right end of the elastic metal cover, which has been opened, elastically returns to its original position, snapping and limiting the snap-fit ball within the spherical snap-fit cavity, the spherical snap-fit head includes: A flexible metal cover with an opening at its right end; The elastic metal cover is provided with a spherical snap-fit cavity; The outer wall of the elastic metal cover has horizontally spaced notches in the front-back and up-down directions at the edge of the opening; The snap-fit ball passes through the opening and snaps into the corresponding spherical snap-fit cavity.
[0008] As a further optimization, in order to achieve the snap-fit fixation of the inner ends of the first and second pipes and facilitate disassembly, the outer snap-fit structure includes: A connecting structure is circumferentially fixedly assembled to the inner side of the outer wall of the first pipe; One end of the elastic metal card is fixedly assembled on the inner side of the outer wall of the connecting structure. A limit ring is fixedly sleeved on the inner end of the outer wall of the second pipe, and the side of the limit ring away from the inner end of the second pipe is a plane; The other end of the elastic metal card is engaged with the plane on the side of the limiting ring away from the inner end of the second pipe.
[0009] As a further optimization, the elastic metal cards are engaged with the limiting ring on the plane away from the inner end of the second pipe through elastic deformation. Applying sufficient external force to pull the right ends of multiple elastic metal cards outward to deform them can release the engagement with the limiting ring. The elastic metal cards include: A flexible metal plate, one end of which is fixedly connected to the inner side of the outer wall of the connecting structure; A strip-shaped locking block is integrally formed on the other side of the bottom surface of the elastic metal plate, which is locked onto the plane of the limiting ring away from the inner end of the second pipe.
[0010] As a further optimization, to facilitate the installation and removal of the flexible metal card and make it easy to replace, the connection structure includes: A connecting groove is formed on the inner side of the outer wall of the first pipe; An ear plate is inserted into the connecting groove; The left end of the elastic metal card is fixedly connected to the inner end of the outer wall of the ear plate; The ear plate is screwed and fixed to the corresponding connecting groove with a countersunk bolt.
[0011] As a further optimization, in order to form a plastic composite pipe and provide wear resistance, pressure resistance, and impact resistance on the inner side, the first pipe and the second pipe have the same structure, and the first pipe includes: The inner plastic layer has a wear-resistant coating on its inner ring surface; The reinforcing rib layer is sleeved on the outer wall of the inner plastic layer; An outer plastic layer is fitted around the outside of the reinforcing rib layer; The right end of the annular seal is attached and fixed to the left edge of the second pipe. The left end of the annular seal is inserted between the inner and outer plastic layers at the right end of the first pipe. The inner snap-fit structure extends through the annular seal.
[0012] As a further optimization, in order to provide better protection for the outer layer of the device, a protective layer is provided on the outer wall of the outer plastic layer.
[0013] As a further optimization, in order to improve the supporting strength of the reinforcing ribs and thus improve the impact and compression resistance of the device, the reinforcing rib layer is composed of reinforcing ribs distributed in a ring. The reinforcing ribs are distributed in a spiral pattern.
[0014] As a further optimization, in order to seal the connection between the inner ends of the first and second pipes, the annular seal includes: A ring-shaped rubber ring is attached and fixed at its right end to the left edge of the second pipe. The left end of the annular rubber ring is integrally formed with a sealing rubber ring on the same axis, which is inserted between the inner plastic layer and the outer plastic layer at the right end of the first pipe. The annular rubber ring and the sealing rubber ring have reserved through holes on their left and right side walls corresponding to the inner snap-fit structure.
[0015] This utility model provides an improved plastic composite pipe that is easy to connect, which has the following improvements and advantages compared with the prior art: The inner ends of the first and second pipes are connected to the outer walls of their inner ends by an outer snap-fit structure, and a ring-shaped seal is provided between the first and second pipes to provide a sealing effect; an inner snap-fit structure is installed between the reinforcing ribs of the inner ends of the first and second pipes to connect the inner sides of the inner ends of the first and second pipes; the inner and outer sides of the inner ends of the first and second pipes are snapped together to improve the stability and strength of the connection and reduce the risk of damage and leakage under external pressure and impact. Attached Figure Description
[0016] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0017] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic cross-sectional view of the structure of this utility model; Figure 3 This utility model Figure 2 Enlarged structural diagram at point A in the middle; Figure 4 This is a schematic diagram of the spherical clip structure of this utility model; Figure 5 This is a schematic diagram of the first pipe cross-section structure of this utility model; Figure 6 This is a schematic diagram of the spiral distribution of the reinforcing ribs in this utility model.
[0018] Explanation of reference numerals in the attached figures: 1-First pipe, 11-Inner plastic layer, 12-Outer plastic layer, 13-Reinforcing rib layer, 14-Wear-resistant layer, 15-Protective layer, 2-Second pipe, 3-Outer snap-fit structure, 31-Limiting ring, 32-Elastic metal clip, 321-Elastic metal plate, 322-Strip-shaped clip, 33-Connecting structure, 331-Connecting groove, 332-Ear plate, 333-Countersunk bolt, 4-Annular seal, 41-Annular rubber ring, 42-Sealing rubber ring, 5-Inner snap-fit structure, 51-Left side connecting crossbar, 52-Right side connecting crossbar, 53-Spherical clip, 531-Elastic metal cover, 532-Opening, 533-Strip-shaped notch, 54-Snap-fit ball. Detailed Implementation
[0019] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0020] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0021] In the description of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0022] Please see Figure 1-6 This utility model provides a technical solution: a plastic composite pipe that is easy to connect, comprising: The first pipe 1 and the second pipe 2 are equipped with an outer snap-fit structure 3 between the inner ends of the outer walls on both sides; The inner end of the second pipe 2 is fixedly fitted with one end of an annular seal 4, and the other end of the seal is attached to the inner end face of the first pipe 1. The first pipe 1 and the second pipe 2 are provided with a reinforcing rib layer 13 in the middle; An inner snap-fit structure 5 is assembled between the reinforcing rib layer 13 at the inner end of the first pipe 1 and the second pipe 2.
[0023] Specifically, in this embodiment, both the first pipe 1 and the second pipe 2 are PE pipes; Furthermore, the inner ends of the first pipe 1 and the second pipe 2 are connected to the outer walls of their inner ends by an outer snap-fit structure 3; an inner snap-fit structure 5 is assembled between the reinforcing ribs 13 at the inner ends of the first pipe 1 and the second pipe 2 to connect the inner sides of the inner ends of the first pipe 1 and the second pipe 2; the inner and outer sides of the inner ends of the first pipe 1 and the second pipe 2 are snapped together to improve the stability and strength of the two after snapping together, and reduce the risk of damage and leakage under external pressure and impact; More specifically, both the first pipe 1 and the second pipe 2 have the same structure, both being plastic composite pipes. The reinforcing rib layer 13 is a supporting structural layer between the inner and outer layers, which improves the strength of the pipe. It is understandable that the annular seal 4 is provided between the first pipe 1 and the second pipe 2 to provide a sealing effect.
[0024] In some embodiments, the inner snap-fit structure 5 includes: The left side connecting crossbar 51 is fixedly connected to the right end of the reinforcing rib layer 13 of the first pipe 1; A spherical clip 53 is fixedly fitted to the right end of the left connecting crossbar 51; The right side connecting crossbar 52 is fixedly connected to the left end of the reinforcing rib layer 13 of the second pipe 2; The left end of the right connecting crossbar 52 is fixedly fitted with a snap-fit ball 54 corresponding to the spherical clip head 53; The snap-fit ball 54 is snapped into the corresponding spherical snap-fit head 53; The spherical card head 53 includes: The elastic metal cover 531 has an opening 532 at its right end; The elastic metal cover 531 has a spherical snap-fit cavity inside; The outer wall of the elastic metal cover 531 has horizontally spaced strip-shaped notches 533 at the edges of the opening 532 in the front-back and up-down directions; The snap-fit ball 54 passes through the opening 532 and snaps into the corresponding spherical snap-fit cavity.
[0025] Specifically, in this embodiment, the left connecting crossbar 51 is fixedly connected to the right end of the reinforcing rib layer 13 of the first pipe 1, and each reinforcing rib is fixed with a left connecting crossbar 51 at its right end. The right-side connecting crossbar 52 is fixedly connected to the left end of the reinforcing rib layer 13 of the second pipe 2. Specifically, each reinforcing rib has a right-side connecting crossbar 52 fixed to its left end. Furthermore, when the snap-fit ball 54 is pushed through the opening 532 at the right end of the elastic metal cover 531, the strip-shaped notch 533 on the outer wall of the elastic metal cover 531 is opened, so that the snap-fit ball 54 can enter the spherical snap-fit cavity. Then the right end of the elastic metal cover 531, which has been opened, elastically resets and snaps the snap-fit ball 54 into the spherical snap-fit cavity. More specifically, the elastic metal cover 531 is made of spring steel, and the edges of the strip-shaped notch 533 are rounded to prevent the strip-shaped notch 533 from cracking along the corners when the opening end of the elastic metal cover 531 deforms. Understandably, the elastic metal cover 531 is relatively thin. When squeezed, the opening 532 end is squeezed and deformed along the strip notch 533, allowing the snap-fit ball 54 to enter. When disassembling, the snap-fit ball 54 is pulled out in the opposite direction, and the opening 532 end of the elastic metal cover 531 is squeezed and deformed along the strip notch 533, allowing the snap-fit ball 54 to be pulled out.
[0026] In some embodiments, the outer snap-fit structure 3 includes: The connecting structure 33 is circumferentially fixed to the inner side of the outer wall of the first pipe 1; One end of an elastic metal clip 32 is fixedly assembled on the inner side of the outer wall of the connecting structure 33. A limiting ring 31 is fixedly sleeved on the inner end of the outer wall of the second pipe 2, and the side away from the inner end of the second pipe 2 is a plane. The other end of the elastic metal card 32 is engaged with the plane on the side of the limiting ring 31 away from the inner end of the second pipe 2; The flexible metal card 32 includes: One end of the elastic metal plate 321 is fixedly connected to the inner end of the outer wall of the connecting structure 33; A strip-shaped locking block 322 is integrally formed on the other side of the bottom surface of the elastic metal plate 321, which is locked onto the plane of the limiting ring 31 away from the inner end of the second pipe 2.
[0027] Specifically in this embodiment, the connecting structure 33 is used to fix the left end of the elastic metal card 32 to the inner side of the outer wall of the first pipe 1. The fixed elastic metal card 32 is circumferentially distributed to ensure the stability of its right end after it is engaged with the plane of the limiting ring 31 away from the inner side of the second pipe 2. Furthermore, the elastic metal plate 321 is made of spring steel. When in use, the right end is pulled outward to deform it. The strip-shaped locking block 322 on the right end of the elastic metal plate 321 is locked into the plane of the limiting ring 31 away from the inner end of the second pipe 2. In order to pull the right end of multiple elastic metal plates 321 outward at the same time, multiple people can operate. More specifically, apply sufficient external force to pull outward the right end of multiple elastic metal cards 32 to deform them, pull the second pipe 2 to drive the limiting ring 31 to move outward and make contact with the card.
[0028] In some embodiments, the connection structure 33 includes: A connecting groove 331 is formed on the inner side of the outer wall of the first pipe 1; An ear plate 332 is inserted into the connecting groove 331; The left end of the elastic metal card 32 is fixedly connected to the inner end of the outer wall of the ear plate 332; A countersunk bolt 333 is screwed between the ear plate 332 and the corresponding connecting groove 331.
[0029] Specifically, in this implementation, the countersunk bolt 333 is designed to prevent it from protruding from the lug 332 and the pipe surface; Furthermore, after removing the countersunk bolt 333, the ear plate 332 can be removed from the connecting groove 331. During installation, the operation is reversed, which facilitates the installation and removal of the elastic metal clip 32 and makes it easy to replace it.
[0030] In some embodiments, the first pipe 1 and the second pipe 2 have the same structure, and the first pipe 1 includes: The inner plastic layer 11 has a wear-resistant layer 14 coated on its inner ring surface; The reinforcing rib layer 13 is fitted onto the outer wall of the inner plastic layer 11; An outer plastic layer 12 is fitted over the outer side of the reinforcing rib layer 13; The right end of the annular seal 4 is attached and fixed to the left edge of the second pipe 2; The left end of the annular seal 4 is inserted between the inner plastic layer 11 and the outer plastic layer 12 at the right end of the first pipe 1; The inner snap-fit structure 5 penetrates the annular seal 4.
[0031] Specifically in this embodiment, both the inner plastic layer 11 and the outer plastic layer 12 are made of PE material, and the reinforcing rib layer 13 is made of steel. The setting of the reinforcing rib layer 13 improves the device's resistance to pressure and impact. Furthermore, the wear-resistant layer 14 is specifically a wear-resistant rubber layer, which serves as an inner lining to improve the wear resistance of the inner wall of the device.
[0032] In some embodiments, the outer wall of the outer plastic layer 12 is provided with a protective layer 15; the protective layer 15 is made of high-density polyethylene to improve the friction resistance and corrosion resistance of the outer wall of the device.
[0033] In some embodiments, the reinforcing rib layer 13 is composed of ring-shaped reinforcing ribs; The ring-shaped reinforcing ribs are distributed in a spiral pattern, which improves the supporting strength of the reinforcing ribs and thus enhances the impact and compression resistance of the device.
[0034] In some embodiments, the annular seal 4 includes; The right end of the annular rubber ring 41 is attached and fixed to the left edge of the second pipe 2. A sealing ring 42 is integrally formed on the left end of the annular rubber ring 41, which is inserted between the inner plastic layer 11 and the outer plastic layer 12 at the right end of the first pipe 1. The annular rubber ring 41 and the sealing rubber ring 42 have pre-reserved through holes on the inner side of their corresponding snap-fit structures 5.
[0035] Specifically in this embodiment, the left connecting crossbar 51 passes through these reserved through holes. The size of these reserved through holes is the same as the outer diameter of the spherical clamp 53, providing a passage for the spherical clamp 53 to pass through. The reserved through holes are located between the inner plastic layer 11 and the outer plastic layer 12, and do not affect the sealing effect of the annular seal 4 on the inner ends of the first pipe 1 and the second pipe 2.
[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.
Claims
1. A plastic composite pipe that is easy to connect, characterized in that, include: The first pipe (1) and the second pipe (2) are fitted with an outer snap-fit structure (3) between the inner ends of the outer walls on both sides. The inner end of the second pipe (2) is fixedly fitted with one end of an annular seal (4), and the other end of the seal is attached to the inner end face of the first pipe (1). The first pipe (1) and the second pipe (2) are provided with a reinforcing rib layer (13) in the middle. An inner snap-fit structure (5) is assembled between the reinforcing rib layer (13) at the inner end of the first pipe (1) and the second pipe (2).
2. The easily connected plastic composite pipe according to claim 1, characterized in that, The inner snap-fit structure (5) includes: The left side connecting crossbar (51) is fixedly connected to the right end of the reinforcing rib layer (13) of the first pipe (1); The right end of the left connecting crossbar (51) is fixedly fitted with a spherical clip (53); The right side connecting crossbar (52) is fixedly connected to the left end of the reinforcing rib layer (13) of the second pipe (2); The left end of the right connecting crossbar (52) is fixedly fitted with a snap-fit ball (54) corresponding to the spherical snap-fit head (53). The snap-fit ball (54) snaps into the corresponding spherical snap-fit head (53).
3. The easily connected plastic composite pipe according to claim 2, characterized in that, The spherical clip (53) includes: A flexible metal cover (531) has an opening (532) at its right end. The elastic metal cover (531) is provided with a spherical snap-fit cavity; The outer wall of the elastic metal cover (531) has a horizontal strip-shaped notch (533) at the edge of the opening (532) in the front-back and up-down directions. The snap-fit ball (54) passes through the opening (532) and snaps into the corresponding spherical snap-fit cavity.
4. The easily connected plastic composite pipe according to claim 1, characterized in that, The outer snap-fit structure (3) includes: The connecting structure (33) is circumferentially fixed to the inner side of the outer wall of the first pipe (1); One end of an elastic metal card (32) is fixedly assembled on the inner side of the outer wall of the connecting structure (33); A limiting ring (31) is fixedly sleeved on the inner end of the outer wall of the second pipe (2), and the side away from the inner end of the second pipe (2) is a plane; The other end of the elastic metal card (32) is engaged with the plane on the side of the limiting ring (31) away from the inner end of the second pipe (2).
5. A plastic composite pipe for easy connection according to claim 4, characterized in that, The flexible metal card (32) includes: One end of the elastic metal plate (321) is fixedly connected to the inner end of the outer wall of the connecting structure (33); The elastic metal plate (321) has a strip-shaped locking block (322) integrally formed on the other side of its bottom surface, which is locked onto the plane of the limiting ring (31) away from the inner end of the second pipe (2).
6. A plastic composite pipe for easy connection according to claim 4, characterized in that, The connection structure (33) includes: A connecting groove (331) is formed on the inner side of the outer wall of the first pipe (1); An ear plate (332) is inserted into the connecting groove (331); The left end of the elastic metal card (32) is fixedly connected to the inner end of the outer wall of the ear plate (332); A countersunk bolt (333) is screwed between the ear plate (332) and the corresponding connecting groove (331).
7. A plastic composite pipe for easy connection according to claim 1, characterized in that, The first pipe (1) and the second pipe (2) have the same structure, and the first pipe (1) includes: The inner plastic layer (11) has a wear-resistant layer (14) coated on its inner ring surface. The reinforcing rib layer (13) is sleeved on the outer wall of the inner plastic layer (11); An outer plastic layer (12) is provided on the outside of the reinforcing rib layer (13); The right end of the annular seal (4) is pasted and fixed to the left edge of the second pipe (2); The left end of the annular seal (4) is inserted between the inner plastic layer (11) and the outer plastic layer (12) at the right end of the first pipe (1); The inner snap-fit structure (5) penetrates the annular seal (4).
8. A plastic composite pipe for easy connection according to claim 7, characterized in that, The outer plastic layer (12) has a protective layer (15) on its outer wall.
9. A plastic composite pipe for easy connection according to claim 7, characterized in that, The reinforcing rib layer (13) is composed of ring-shaped reinforcing ribs; The reinforcing ribs are distributed in a spiral pattern.
10. A plastic composite pipe for easy docking according to claim 7, characterized in that, The annular seal (4) includes: The right end of the annular rubber ring (41) is attached and fixed to the left edge of the second pipe (2); The left end of the annular rubber ring (41) is coaxially integrally formed with a sealing rubber ring (42), which is inserted between the inner plastic layer (11) and the outer plastic layer (12) at the right end of the first pipe (1); The left and right sidewalls of the annular rubber ring (41) and the sealing rubber ring (42) are provided with reserved through holes corresponding to the inner snap-fit structure (5).