High-strength PE pipe fitting convenient to connect

Abstract

The utility model discloses a high -strength PE pipe fitting convenient to connect, including pipe fitting one and pipe fitting two, the pipe fitting one and pipe fitting two are close to one side as hot melt surface, the pipe fitting one outer wall is fixedly connected with the locating ring, the locating ring outer wall has set up multiple sets of locating hole, the snap ring no.

Description

Technical Field

[0001] This utility model relates to the field of PE pipe fittings technology, specifically a high-strength PE pipe fitting that is easy to connect. Background Technology

[0002] Polyethylene (PE) pipe fittings are widely used in water supply and drainage, gas transmission, and industrial fluid transport due to their advantages such as corrosion resistance, high flexibility, and long service life. Currently, the mainstream connection methods for PE pipe fittings include heat fusion, electrofusion, and flange connections.

[0003] In underground pipe installations, factors such as soil settlement, frost heave, and groundwater level changes can generate continuous mechanical stress on PE pipe fitting interfaces. For example, seasonal freeze-thaw cycles cause soil expansion and contraction, which repeatedly act on the pipe fitting interfaces, gradually creating gaps at traditional heat fusion or flange connections, reducing sealing performance and leading to leaks. In corrosive environments such as coastal areas or chemical industrial parks, salt spray, acid and alkaline gases in the air can accelerate the aging of the sealing materials at the pipe fitting interfaces. Rubber sealing rings lose elasticity under long-term erosion and cannot effectively fill the gaps at the interfaces, causing the connections to loosen. For pipelines transporting sewage, chemical raw materials, and other media, leaks caused by loose interfaces can lead to pollutants seeping into the soil and groundwater, damaging the ecological environment, affecting the water safety of surrounding residents, and causing environmental pollution accidents. Therefore, this utility model proposes a high-strength PE pipe fitting that is easy to connect, solving the above problems. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing PE pipe fittings, such as loosening of joints and poor sealing due to environmental factors, a dual fixation system of mechanical and thermal fusion is achieved by setting positioning rings, retaining rings, and insertion rods and pins to limit the connection, thus preventing gaps and leaks caused by soil stress at the joints.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: It includes a pipe fitting one and a pipe fitting two, the side of the pipe fitting one and the pipe fitting two that are in close contact is a heat-melting surface, a positioning ring is fixedly connected to the outer wall of the pipe fitting one, the outer wall of the positioning ring has multiple sets of positioning holes arranged circumferentially, the outer wall of the pipe fitting two has a slot, a retaining ring one and a retaining ring two are engaged in the slot, multiple sets of insert rods are fixedly connected to the outer walls of the retaining ring one and the retaining ring two, the position of each set of insert rods corresponds one-to-one with the position of the positioning hole, the insert rods are inserted into the corresponding positioning holes, a limiting mechanism is installed on the outer wall of the positioning ring, and a fixing mechanism is installed on the outer wall of the retaining ring two;

[0008] The limiting mechanism is used to fix and limit multiple sets of insertion rods;

[0009] The fixing mechanism is used to fix the first retaining ring and the second retaining ring.

[0010] Preferably, the limiting mechanism includes multiple sets of pins slidably connected to the outer wall of the positioning ring. Each set of pins extends slidably into an adjacent positioning hole. A spring is sleeved on the outer wall of the pin. The spring is fixedly connected to the outer wall of the positioning ring. The other end of the spring is fixedly connected to the end of the pin. Each set of pins has a through hole on its outer wall. The pin is inserted into the corresponding hole.

[0011] Preferably, the fixing mechanism includes connecting blocks fixedly connected to both ends of the retaining ring, the end face of the connecting block is provided with a fixing groove, and one end of the retaining ring is integrally formed with an expansion block, which is inserted into the fixing groove.

[0012] Preferably, the outer wall of the connecting block is threaded with a screw, and the screw thread extends into the outer wall extension block of the retaining ring.

[0013] Preferably, each set of pin ends is integrally formed with a limiting block, and the radius of the limiting block is larger than the radius of the pin.

[0014] Preferably, multiple sets of positioning rods are fixedly connected to the inner wall of the slot, and multiple sets of connecting holes corresponding to the positions of the positioning rods are opened on the inner walls of the first and second retaining rings, and the positioning rods are inserted into the corresponding connecting holes.

[0015] (III) Beneficial Effects

[0016] Compared with the prior art, this utility model provides a high-strength PE pipe fitting that is easy to connect, and has the following beneficial effects:

[0017] 1. Through components such as retaining ring one, retaining ring two, positioning ring, and insert rod, the inclined guide structure of the positioning hole achieves rapid alignment. Combined with the secondary limiting formed by the pin inserting into the insert rod hole, and the rigid locking of the retaining ring by the screw, a rigid-flexible connection system is constructed. This not only ensures the tight fit of the hot melt surface, but also enhances the overall rigidity of the interface through the mechanical structure. In corrosive environments such as coastal salt spray and acid and alkaline gases in chemical industrial parks, it effectively delays the elastic failure problem caused by the aging of sealing materials. Even if the rubber sealing ring loses its elasticity, the mechanical cooperation between the retaining ring and the positioning ring can still maintain the tightness of the interface.

[0018] 2. By setting a positioning rod in the groove on the outer wall of the second pipe fitting and cooperating with the connecting holes of the first and second retaining rings, it can be ensured that the two sets of retaining rings are precisely aligned along the circumference of the second pipe fitting during installation, avoiding the deviation between the insertion rod and the positioning hole caused by misalignment during installation. Attached Figure Description

[0019] Figure 1 This is a structural schematic diagram of a high-strength PE pipe fitting that is easy to connect, as proposed in this utility model.

[0020] Figure 2 for Figure 1 A structural schematic diagram of a section of the central pipe fitting;

[0021] Figure 3 for Figure 1 Schematic diagrams of two sections of the central pipe fitting;

[0022] In the diagram: 1. Fitting 1; 2. Fitting 2; 3. Positioning hole; 4. Snap ring 1; 5. Positioning ring; 6. Insert rod; 7. Pin; 8. Spring; 9. Snap groove; 10. Snap ring 2; 11. Positioning rod; 12. Insertion hole; 13. Connecting block; 14. Fixing groove; 15. Screw. Detailed Implementation

[0023] In this utility model, unless otherwise stated, the orientations used, such as "up" and "down", usually refer to the direction shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0024] This utility model provides a technical solution for high-strength PE pipe fittings that are easy to connect:

[0025] Please see Figure 1-3 A high-strength PE pipe fitting that is easy to connect includes a pipe fitting 1 and a pipe fitting 2. The side of the pipe fitting 1 and the pipe fitting 2 that is close to each other is a heat-fusion surface. A positioning ring 5 is fixedly connected to the outer wall of the pipe fitting 1. The positioning ring 5 has multiple sets of positioning holes 3 on its outer wall, which are arranged circumferentially. The outer wall of the pipe fitting 2 has a slot 9. A retaining ring 4 and a retaining ring 10 are engaged in the slot 9. Multiple sets of insert rods 6 are fixedly connected to the outer walls of the retaining ring 4 and the retaining ring 10. The position of each set of insert rods 6 corresponds one-to-one with the position of the positioning hole 3. The insert rods 6 are inserted into the corresponding positioning holes 3. A limit mechanism is installed on the outer wall of the positioning ring 5. A fixing mechanism is installed on the outer wall of the retaining ring 10.

[0026] The limiting mechanism is used to fix and limit multiple sets of insertion rods 6;

[0027] The fixing mechanism is used to fix the retaining ring 4 and the retaining ring 10;

[0028] Furthermore, by cooperating with the insertion rod 6 and positioning hole 3 of the positioning ring 5 and the retaining ring 4 and retaining ring 2 10, and with the double fixation of the limiting mechanism and the fixing mechanism, compared with the traditional connection method, it can effectively resist mechanical stress such as soil settlement and frost heave, prevent the pipe joint from loosening and causing gaps, avoid gas leakage and pollutant diffusion caused by reduced sealing, and reduce the inspection and maintenance costs caused by joint problems.

[0029] The limiting mechanism includes multiple sets of pins 7 that are slidably connected to the outer wall of the positioning ring 5. Each set of pins 7 extends slidably into the adjacent positioning hole 3. A spring 8 is sleeved on the outer wall of the pin 7. The spring 8 is fixedly connected to the outer wall of the positioning ring 5. The other end of the spring 8 is fixedly connected to the end of the pin 7. Each set of insert rods 6 has a through hole 12 on its outer wall. The pin 7 is inserted into the corresponding hole 12.

[0030] Furthermore, the pin 7, under the action of the spring 8, is inserted into the insertion hole 12 of the insertion rod 6, forming a secondary limiting structure. This effectively prevents the insertion rod 6 from loosening or coming out of the positioning hole 3. Even when the pipeline is under stress due to complex geological conditions, the stability of the pipe connection can be guaranteed, avoiding flow and pressure fluctuations caused by loosening of the interface and ensuring the stable operation of the pipeline system. It should be noted that the end faces of the pin 7 and the insertion rod 6 are both set with bevels. Therefore, during installation, the contact between the bevels can guide the pin 7 to slide into the insertion hole 12.

[0031] The fixing mechanism includes connecting blocks 13 fixedly connected to both ends of the retaining ring 10. The end face of the connecting block 13 is provided with a fixing groove 14. The end of the retaining ring 4 is integrally formed with an extension block, which is inserted into the fixing groove 14.

[0032] Furthermore, the expansion block of the retaining ring 4 cooperates with the fixing groove 14 of the connecting block 13 of the retaining ring 2 10 to pre-fix the retaining ring 4 and the retaining ring 2 10. Combined with the limiting mechanism, this can enhance the overall connection strength.

[0033] The outer wall of the connecting block 13 is threaded with screws 15, and the screws 15 extend into the expansion block of the outer wall of the retaining ring 1 4. Each set of pins 7 has an integrally formed limit block at the end, and the radius of the limit block is larger than the radius of the pin 7. Multiple sets of positioning rods 11 are fixedly connected to the inner wall of the slot 9. Multiple sets of connecting holes corresponding to the positions of the positioning rods 11 are opened on the inner walls of the retaining ring 1 4 and the retaining ring 2 10, and the positioning rods 11 are inserted into the corresponding connecting holes.

[0034] Furthermore, the limiting block can prevent the pin 7 from sliding excessively out of the positioning ring 5 under the action of the spring 8, ensuring that the pin 7 is always in a state that can effectively limit the insertion rod 6, and can maintain the normal function of the limiting mechanism even when the pipeline is subjected to external forces such as vibration and impact.

[0035] In practical use, the working principle of this utility model is as follows:

[0036] When construction workers connect PE pipe fittings, they first install circlip 4 and circlip 10 into position along the groove 9 on the outer wall of fitting 2. At this time, the positioning rod 11 on the inner wall of the groove 9 is precisely inserted into the connection hole on the inner wall of circlip 4 and circlip 10, ensuring that the two sets of circlips are aligned circumferentially along fitting 2 to avoid misalignment. Then, screws 15 are used to secure circlip 4 and circlip 10.

[0037] Subsequently, the hot-melt surfaces of fitting 1 and fitting 2 are bonded together, bringing the positioning ring 5 on the outer wall of fitting 1 close to retaining ring 4 and retaining ring 10. At this time, the multiple sets of inserts 6 on the retaining rings are automatically guided during the pushing process because their end face bevels contact the edge bevels of the positioning holes 3 of the positioning rings 5, and quickly insert into the corresponding positioning holes 3, completing the initial alignment and pre-fixation of the pipe axis. This structural design avoids the stress concentration problem at the interface caused by manual alignment deviation in traditional hot-melt connections. Even in narrow spaces or complex terrains, rapid alignment can be achieved through the mechanical cooperation of the retaining rings and positioning rings.

[0038] After pre-fixing, the pin 7 of the limiting mechanism slides along the outer wall of the positioning ring 5 and embeds into the insertion hole 12 of the insertion rod 6 under the elastic force of the spring 8. Since both the end faces of the pin 7 and the insertion rod 6 are beveled, no additional external force is required during installation; the beveled contact guides the pin 7 to accurately fall into the insertion hole 12. This design effectively resists the continuous mechanical stress caused by environmental factors such as soil settlement and frost heave. When the pipeline is subjected to axial or radial force due to soil displacement, the pin 7 restricts the displacement of the insertion rod 6 within the positioning hole 3, preventing gaps at the interface and fundamentally eliminating the risk of gas leakage or sewage seepage into the soil.

[0039] The above are merely specific embodiments of this utility model, but the technical features of this utility model are not limited thereto. Any simple changes, equivalent substitutions, or modifications made based on this utility model to solve essentially the same technical problems and achieve essentially the same technical effects are all covered within the protection scope of this utility model.

Claims

1. A high strength PE pipe fitting for easy connection comprising a pipe fitting one (1) and a pipe fitting two (2) characterised in that: The one (1) and the pipe two (2) are close to the hot melt surface, the pipe one (1) outer wall fixedly connected with the positioning ring (5), the positioning ring (5) outer wall is equipped with multiple positioning hole (3), and the circumferential setting, the pipe two (2) outer wall is equipped with the clamping groove (9), the clamping groove (9) is clamped with the snap ring one (4) and the snap ring two (10), the snap ring one (4) and the snap ring two (10) outer wall fixedly connected with multiple groups of insertion rod (6), each group of the insertion rod (6) position is one-to-one corresponding with the positioning hole (3) position, the insertion rod (6) is inserted in the corresponding positioning hole (3), the positioning ring (5) outer wall is equipped with the limiting mechanism, the snap ring two (10) outer wall is equipped with the fixed mechanism; The limiting mechanism is used for fixing multiple insertion rods (6) in position; The fixed mechanism is used for fixing the snap ring one (4) and the snap ring two (10).

2. A high strength PE pipe fitting for easy connection according to claim 1, characterized in that: The limiting mechanism includes multiple groups of insertion pins (7) slidably connected to the outer wall of the positioning ring (5), each group of the insertion pins (7) is slidably extended into the adjacent positioning hole (3), the insertion pin (7) outer wall is equipped with the spring (8), the spring (8) is fixedly connected with the outer wall of the positioning ring (5), the other end of the spring (8) is fixedly connected with the end of the insertion pin (7), the outer wall of each group of the insertion rod (6) is equipped with an insertion hole (12), and the insertion pin (7) is inserted into the corresponding insertion hole (12).

3. A high strength PE pipe fitting for easy connection according to claim 2, characterized in that: The fixed mechanism includes the link block (13) fixedly connected to the two ends of the snap ring two (10), the link block (13) end face is equipped with the fixed slot (14), the snap ring one (4) end is integrally formed with the expansion block, and the expansion block is inserted into the fixed slot (14).

4. A high strength PE pipe fitting for easy connection according to claim 3, characterized in that: The link block (13) outer wall is threadedly connected with the screw (15), and the screw (15) is threadedly extended into the expansion block of the outer wall of the snap ring one (4).

5. A high strength PE pipe fitting for easy connection according to claim 4, characterized in that: The end of each group of the insertion pin (7) is integrally formed with a limiting block, and the radius size of the limiting block is greater than the radius of the insertion pin (7).

6. A high strength PE pipe fitting for easy connection according to claim 5, characterized in that: The clamping groove (9) inner wall is fixedly connected with multiple positioning rods (11), the snap ring one (4) and the snap ring two (10) inner wall is equipped with multiple groups of connecting holes corresponding to the position of the positioning rod (11), and the positioning rod (11) is inserted into the corresponding connecting hole.

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