DN15 double-screw sizing pipe

Abstract

The utility model relates to the technical field of connecting pipelines, and discloses a DN15 double-screw sizing pipe which comprises a pipe body, connecting nuts are fixedly connected to the two ends of the pipe body respectively, threads are arranged on the inner side of the connecting nut at one end, a pipe core is fixedly connected to the inner side of the connecting nut, threads are arranged on the outer side of the pipe core, and the pipe core is fixedly connected with the pipe body. A sealing rubber ring is fixedly connected to the inner side of a cavity formed by the pipe core and the connecting nut, a reinforcing butt joint mechanism is fixedly connected to the top of the connecting nut, and a noise reduction flow slowing mechanism is fixedly connected to the inner side of the pipe body. According to the utility model, the clamping sliding rod compresses the clamping reset spring and slides in the fixed connecting block I through external force, and the clamping sliding rod is rotated to enable the limiting short column to be clamped into the transverse clamping groove, so that automatic clamping reinforcement is realized, the connecting stability is enhanced, the connecting part is effectively prevented from loosening, rotating and leaking, the safety and reliability of a pipeline system are improved, and the service life of the pipeline system is prolonged. Mounting and dismounting are convenient, and the construction efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of pipe connection technology, and in particular to a DN15 double-threaded fixed-length pipe. Background Technology

[0002] Pre-cut pipes are pipes manufactured to specific lengths. Compared to conventional pipes, they reduce cutting waste during installation, improve material utilization, and lower construction costs. They are widely used in building water supply and drainage, HVAC, and industrial piping. With pre-determined lengths, pre-cut pipes enable standardized installation, ensuring precise pipe system connections, high installation efficiency, and convenience for engineering construction.

[0003] The DN15 double-threaded standard-length pipe mainly consists of a pipe body and double-threaded interfaces. The pipe body serves as the fluid transport channel, while the double-threaded interfaces facilitate quick and secure connection with other pipe fittings, ensuring a tight seal. Before use, clean the connection area, apply sealant, align the pipe fitting with the threads, and screw it in. Connect the components in sequence. After installation, perform a pressure test to ensure there are no leaks before normal use.

[0004] In existing technologies, most double-threaded fixed-length pipes used for connection lack reinforced joints, which can lead to loosening and rotation after long-term use. Once this happens, the sealing performance of the pipe connection deteriorates, easily causing fluid leakage. This not only wastes resources but may also cause safety accidents and affect the normal operation of the pipeline system. At the same time, the loosened pipe is difficult to repair, requiring a lot of manpower and resources for inspection and replacement, increasing the cost of use and maintenance burden. Therefore, a DN15 double-threaded fixed-length pipe is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above deficiencies, this utility model provides a DN15 double-threaded fixed-length pipe, which aims to improve the problem that the existing double-threaded fixed-length pipe is prone to loosening and rotation after long-term use due to the lack of reinforced connection, resulting in sealing failure, fluid leakage, safety accidents, and high maintenance costs.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A DN15 double-threaded fixed-length pipe includes a pipe body, with connecting nuts fixedly connected to both ends of the pipe body. The inner side of the connecting nuts is threaded, and a pipe core is fixedly connected to the inner side of the connecting nuts. The outer side of the pipe core is threaded. A sealing ring is fixedly connected to the inner side of the cavity formed by the pipe core and the connecting nuts. A reinforcing docking mechanism is fixedly connected to the top of the connecting nuts. A noise-reducing and flow-slowing mechanism is fixedly connected to the inner side of the pipe body.

[0008] The reinforced docking mechanism includes a fixed connecting block 1, the bottom of which is fixedly connected to the top of the connecting nut. A locking and limiting component is slidably connected to the inner side of the fixed connecting block 1, and a locking and returning spring is sleeved on the outer side of the locking and limiting component. One end of the locking and returning spring is fixedly connected to the inner side of the fixed connecting block 1.

[0009] As a further description of the above technical solution:

[0010] The engaging limiting assembly includes an engaging slide rod, the outer side of which is slidably connected to the inner side of the fixed connecting block 1, a limiting short post is fixedly connected to the outer side of the end of the engaging slide rod away from the fixed connecting block 1, and the other end of the engaging reset spring is fixedly connected to the outer side of the engaging slide rod.

[0011] As a further description of the above technical solution:

[0012] A second fixed connecting block is fixedly connected to the outer side of the connecting nut, and a vertical sliding groove is provided on the inner side of the second fixed connecting block. The outer side of the engaging slide rod is slidably connected to the inner side of the vertical sliding groove.

[0013] As a further description of the above technical solution:

[0014] A transverse engaging groove is provided on the inner side of the vertical sliding groove, and the limiting short post is slidably connected to the inner side of the transverse engaging groove when engaged.

[0015] As a further description of the above technical solution:

[0016] A connecting pipe head is fixedly connected to the outer side of one end of the pipe body, and threads are provided on both the inner and outer sides of the connecting pipe head;

[0017] As a further description of the above technical solution:

[0018] The outer thread of the connecting tube head is connected to the inner side of the connecting nut, and the inner thread of the connecting tube head is connected to the outer side of the tube core.

[0019] As a further description of the above technical solution:

[0020] The noise reduction and flow slowing mechanism includes a noise reduction cylinder. The outer side of the noise reduction cylinder is fixedly connected to the inner side of the easily bendable part of the pipe body. Multiple air guide holes are opened on the outer side of the fixing ring of the noise reduction cylinder. A buffer air inlet is opened at one end of the noise reduction cylinder close to the connecting nut. A wave-breaking noise reduction hole is opened at one end of the noise reduction cylinder away from the buffer air inlet.

[0021] As a further description of the above technical solution:

[0022] The inner side of the silencing cylinder is provided with a silencing resonance cavity, the inner side of the silencing resonance cavity is fixedly connected with silencing cotton, the inner side of the silencing resonance cavity is fixedly connected with a silencing slit plate, and the inner side of the silencing resonance cavity is fixedly connected with a silencing fiber felt.

[0023] This utility model has the following beneficial effects:

[0024] 1. In this utility model, the reinforcement and docking mechanism uses external force to pull the locking slide rod to compress the locking and resetting spring, causing it to slide within the fixed connecting block. After reaching the appropriate position, the locking slide rod is rotated, causing the limiting short column to rotate laterally. Under the action of the spring force, the limiting short column is locked into the lateral locking groove, completing the automatic locking and reinforcement. This enhances the stability of the pipe connection, effectively prevents the connecting parts from loosening or rotating, avoids the risk of fluid leakage due to loose connection, improves the safety and reliability of the pipeline system, and facilitates the installation and disassembly of the pipeline, thus improving construction efficiency.

[0025] 2. In this utility model, the high-speed airflow in the silencing and flow-slowing mechanism is decelerated and enters the silencing cylinder through the trumpet-shaped buffer air inlet. Part of the airflow flows out through the air guide hole and changes its path. The sound wave interacts with the sound-absorbing cotton, sound-absorbing slit plate and sound-absorbing fiber felt in the silencing resonance cavity. Finally, it is further attenuated through the wave-breaking sound-absorbing hole to achieve silencing and vibration reduction. This effectively reduces the noise of fluid flow, reduces noise pollution to the surrounding environment, and at the same time reduces the impact of airflow, reduces the wear of pipelines and equipment caused by vibration, extends service life, reduces maintenance costs, and provides a guarantee for the stable operation of the pipeline system. Attached Figure Description

[0026] Figure 1 This is a three-dimensional schematic diagram of a DN15 double-screw fixed-length tube proposed in this utility model;

[0027] Figure 2 This is a schematic diagram of the connecting pipe head for a DN15 double-threaded fixed-length pipe proposed in this utility model;

[0028] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0029] Figure 4 This is a schematic diagram of the structure of a connecting nut for a DN15 double-threaded fixed-length pipe proposed in this utility model;

[0030] Figure 5 for Figure 4 Enlarged view of point B in the middle;

[0031] Figure 6 for Figure 4 A magnified view of point C in the middle.

[0032] Legend:

[0033] 1. Pipe body; 2. Connecting nut; 3. Pipe core; 4. Sealing ring; 5. Fixed connecting block one; 6. Engaging slide rod; 7. Engaging return spring; 8. Limiting short post; 9. Fixed connecting block two; 10. Vertical sliding groove; 11. Horizontal engaging groove; 12. Connecting pipe head; 13. Silencer; 14. Buffer air inlet; 15. Air guide hole; 16. Silencer resonance cavity; 17. Silencer cotton; 18. Silencer slit plate; 19. Silencer fiber felt; 20. Wave breaking silencer hole. Detailed Implementation

[0034] 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.

[0035] Reference Figures 1 to 3 This utility model provides an embodiment of a DN15 double-threaded fixed-length pipe, comprising a pipe body 1, which is the main body of the DN15 double-threaded fixed-length pipe. The pipe body 1 possesses sufficient strength and corrosion resistance to ensure stable use under various working conditions such as water supply and drainage, and gas transmission. Its inner diameter is precisely set to DN15. Connecting nuts 2 are fixedly connected to both ends of the pipe body 1. The connecting nuts 2 are fixed to both ends of the pipe body 1, and their inner threads achieve a tight connection with the pipe fittings. External auxiliary structures, in conjunction with a reinforcing docking mechanism, enhance the connection stability and ensure the sealing and safety of the pipeline system. The inner side of the connecting nut 2 is threaded, and a pipe core 3 is fixedly connected to the inner side of the connecting nut 2. The threads of the pipe core 3 connect with the inner threads of the connecting nut 2 and the connecting... The components, such as the connector 12, work together to form a multi-layered sealing and connection structure, enhancing the overall strength of the pipe connection. At the same time, during fluid transportation, they play a certain role in guiding and stabilizing the fluid, reducing the occurrence of turbulence. The outer side of the pipe core 3 is threaded, and the inner side of the cavity formed by the pipe core 3 and the connecting nut 2 is fixedly connected to a sealing ring 4. When the pipe is connected, the sealing ring 4 is squeezed and deformed by the tightening action of the connecting nut 2 and other components, filling the tiny gaps in the connection and forming a reliable sealing effect, effectively preventing fluid leakage and ensuring the sealing and safety of the pipeline system. The top of the connecting nut 2 is fixedly connected to a reinforcing docking mechanism, and the inner side of the pipe body 1 is fixedly connected to a noise-reducing and flow-slowing mechanism.

[0036] The reinforcement docking mechanism includes a fixed connecting block 5, which provides an installation base for the locking and limiting component, ensuring smooth sliding of the locking slide rod 6 and assisting in the reinforcement of the pipeline connection. The bottom of the fixed connecting block 5 is fixedly connected to the top of the connecting nut 2. The locking and limiting component is slidably connected to the inner side of the fixed connecting block 5, and the locking and limiting component is fitted with a locking and returning spring 7 on the outer side. When the pipeline is connected, the locking slide rod 6 is pulled by external force to compress the locking and returning spring 7. When the locking slide rod 6 reaches the appropriate position, the locking slide rod 6 is rotated to make the limiting short column 8 rotate to the lateral side. Under the elastic force of the locking and returning spring 7, the locking slide rod 6 is reset and the limiting short column 8 is locked into the lateral locking groove 11, realizing the automatic locking and reinforcement function. One end of the locking and returning spring 7 is fixedly connected to the inner side of the fixed connecting block 5.

[0037] The locking and limiting assembly includes a locking slide rod 6. During the pipe connection process, the locking slide rod 6 can slide within the fixed connecting block 5 to achieve locking and disengagement with other components. The outer side of the locking slide rod 6 is slidably connected to the inner side of the fixed connecting block 5. The outer side of the locking slide rod 6 away from the fixed connecting block 5 is fixedly connected to a limiting short post 8. The limiting short post 8 can precisely cooperate with the transverse locking groove 11 on the connecting nut 2. The limiting short post 8 plays a positioning and limiting role. During the sliding process of the locking slide rod 6, when the limiting short post 8 slides into the transverse locking groove 11, it further strengthens and limits the pipe connection part, preventing the connection parts from loosening or rotating. The other end of the locking return spring 7 is fixedly connected to the outer side of the locking slide rod 6.

[0038] A second fixed connecting block 9 is fixedly connected to the outer side of the connecting nut 2. The second fixed connecting block 9 and the first fixed connecting block 5 together form the overall structure of the reinforced docking mechanism. A vertical sliding groove 10 is provided on the inner side of the second fixed connecting block 9. The vertical sliding groove 10 provides precise sliding guidance for the engaging slide rod 6, controls the fitting clearance, ensures smooth and stable sliding, and enhances the reliability of the connection structure. The outer side of the engaging slide rod 6 is slidably connected to the inner side of the vertical sliding groove 10.

[0039] The vertical sliding groove 10 has a horizontal locking groove 11 on its inner side. The horizontal locking groove 11 is precisely matched with the limiting short column 8. After locking, it can withstand the pipe connection force and prevent it from coming out, effectively enhancing the stability of the pipe connection. When locking, the limiting short column 8 is slidably connected to the inner side of the horizontal locking groove 11.

[0040] A connecting pipe head 12 is fixedly connected to the outer side of one end of the pipe body 1. During installation, the connecting pipe head 12 is rotated so that its inner side is threaded to the pipe core 3 and its outer side is threaded to the connecting nut 2, thereby reliably connecting the pipe body 1 to other pipes or equipment components. Threads are provided on both the inner and outer sides of the connecting pipe head 12.

[0041] The outer thread of the connecting tube head 12 is connected to the inner side of the connecting nut 2, and the inner thread of the connecting tube head 12 is connected to the outer side of the tube core 3.

[0042] Reference Figures 4 to 6 The noise reduction and flow mitigation mechanism includes a silencer cylinder 13, which effectively reduces the noise generated by fluid flow within the pipe. The outer side of the silencer cylinder 13 is fixedly connected to the inner side of the easily bendable part of the pipe body 1. Multiple air guide holes 15 are provided on the outer side of the fixing ring of the silencer cylinder 13. These air guide holes 15 allow some airflow to exit from the silencer cylinder 13, changing the airflow path and velocity distribution, further reducing the turbulence of the airflow within the pipe, and reducing noise generation. When the airflow passes through the air guide holes 15, the sound waves are also scattered and attenuated, thus achieving a noise reduction effect. The silencer cylinder 13 is similar to the connecting... One end of the nut 2 is provided with a buffer air inlet 14. The buffer air inlet 14 is horn-shaped, which can effectively reduce the airflow velocity in the air compressor pipeline, so that the high-speed airflow is buffered and slowed down when it enters the muffler 13, reducing the impact energy when the airflow enters the muffler 13 and reducing the noise generated by the airflow impact. The end of the muffler 13 away from the buffer air inlet 14 is provided with a wave-breaking silencing hole 20. The wave-breaking silencing hole 20 can further break and reduce the sound wave. When the sound wave propagates to the wave-breaking silencing hole 20, the sound wave will undergo reflection, scattering and other phenomena, so that the energy of the sound wave is attenuated.

[0043] The inner side of the silencer 13 is provided with a sound-absorbing resonant cavity 16. The sound-absorbing resonant cavity 16 can resonate with sound waves of a specific frequency, converting the energy of the sound waves into other forms of energy such as heat energy, thereby consuming the sound wave energy and achieving the purpose of sound absorption. Sound-absorbing cotton 17 is fixedly connected to the inner side of the sound-absorbing resonant cavity 16. The sound-absorbing cotton 17 has a porous structure, which can effectively absorb sound wave energy and convert sound energy into heat energy. When the sound wave enters the sound-absorbing resonant cavity 16, it comes into contact with the sound-absorbing cotton 17, and the sound wave undergoes multiple reflections in the pores of the sound-absorbing cotton 17. Sound waves are continuously absorbed and attenuated through reflection and refraction, thus reducing noise intensity. A sound-absorbing slit plate 18 is fixedly connected to the inner side of the sound-absorbing resonant cavity 16. When sound waves pass through the slit plate 18, they undergo diffraction and interference within the slit, causing the air column between the slits to absorb energy and vibrate, leading to attenuation of sound wave energy and thus a certain degree of sound absorption. A sound-absorbing fiber felt 19 is also fixedly connected to the inner side of the sound-absorbing resonant cavity 16. Made of fibrous material, the sound-absorbing fiber felt 19 has excellent sound absorption and insulation properties. It further absorbs and blocks sound waves, reducing reflection and propagation within the sound-absorbing resonant cavity 16, and works in conjunction with other sound-absorbing components to improve the overall sound absorption effect of the sound-absorbing and flow-slowing mechanism.

[0044] Working principle: During installation, the connecting pipe head 12 is rotated so that its inner side is threaded to the pipe core 3 and its outer side is threaded to the connecting nut 2, thus connecting the pipe body 1 with other pipes or equipment components. During the connection process, an external force is applied to the locking slide rod 6, which compresses the locking return spring 7 and slides within the fixed connecting block 5. When the locking slide rod 6 reaches the appropriate position, it rotates, causing the limiting short column 8 to rotate to the lateral position. Then, under the elastic force of the locking return spring 7, the locking slide rod 6 returns to its original position, and the limiting short column 8 is engaged in the lateral locking groove 11, completing the automatic locking and reinforcement. When the connecting nut 2 is tightened with other components, the sealing ring 4 is compressed and deformed, filling the tiny gaps in the connection area to form a reliable seal and prevent fluid leakage.

[0045] When disassembly is required, first pull the locking slide rod 6 outward and rotate the locking slide rod 6 in the opposite direction to make the limiting short post 8 disengage from the horizontal locking groove 11. At this time, the locking slide rod 6 disengages from the fixed connecting block 9 along the vertical sliding groove 10 under the action of the locking reset spring 7, and the locking state is released. Then rotate the connecting tube head 12 in the opposite direction to separate it from the tube core 3 and the connecting nut 2, and the disassembly is completed.

[0046] During operation, if fluid passes through the easily bendable part of the pipe body 1, the silencer 13 will function. The high-speed airflow is buffered and slowed down by the buffer air inlet 14 before entering the silencer 13. Part of the airflow flows out through the air guide hole 15, changing the flow path and velocity distribution. The sound waves interact with the sound-absorbing cotton 17, the sound-absorbing slit plate 18, and the sound-absorbing fiber felt 19 in the sound-absorbing resonance cavity 16, resulting in reflection and scattering, and the energy continuously attenuates. At the same time, the wave-breaking silencer hole 20 further breaks and reduces the sound waves, achieving noise reduction and vibration reduction, reducing noise pollution to the surrounding environment and personnel, and reducing wear and fatigue of pipelines and related equipment caused by vibration, extending service life and reducing maintenance costs.

[0047] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A DN15 double screw fixed-length pipe comprising a pipe body (1), characterized in that: The two ends of the tube body (1) are respectively fixedly connected with connecting nuts (2). The inner side of the connecting nut (2) is threaded. The inner side of the connecting nut (2) is fixedly connected with a tube core (3). The outer side of the tube core (3) is threaded. The inner side of the cavity formed by the tube core (3) and the connecting nut (2) is fixedly connected with a sealing ring (4). The top of the connecting nut (2) is fixedly connected with a reinforcing docking mechanism. The inner side of the tube body (1) is fixedly connected with a noise reduction and flow slowing mechanism. The reinforcement docking mechanism includes a fixed connecting block (5), the bottom of which is fixedly connected to the top of the connecting nut (2). A locking and limiting component is slidably connected to the inner side of the fixed connecting block (5), and a locking and resetting spring (7) is sleeved on the outer side of the locking and limiting component. One end of the locking and resetting spring (7) is fixedly connected to the inner side of the fixed connecting block (5).

2. The DN15 double screw fixed-length pipe according to claim 1, characterized in that: The locking and limiting assembly includes a locking slide rod (6), the outer side of which is slidably connected to the inner side of the fixed connecting block (5), a limiting short post (8) is fixedly connected to the outer side of one end of the locking slide rod (6) away from the fixed connecting block (5), and the other end of the locking reset spring (7) is fixedly connected to the outer side of the locking slide rod (6).

3. The DN15 double screw fixed-length pipe according to claim 2, characterized in that: The outer side of the connecting nut (2) is fixedly connected to a fixed connecting block two (9), and the inner side of the fixed connecting block two (9) is provided with a vertical sliding groove (10). The outer side of the locking slide rod (6) is slidably connected to the inner side of the vertical sliding groove (10).

4. The DN15 double screw fixed-length pipe according to claim 3, characterized in that: The vertical sliding groove (10) has a horizontal engaging groove (11) on its inner side, and the limiting short column (8) is slidably connected to the inner side of the horizontal engaging groove (11) when engaged.

5. A DN15 double-threaded fixed-length tube according to claim 1, characterized in that: A connecting pipe head (12) is fixedly connected to the outer side of one end of the pipe body (1), and the inner and outer sides of the connecting pipe head (12) are threaded.

6. The DN15 double screw fixed-length pipe according to claim 5, characterized in that: The outer side of the connecting tube head (12) is threaded to the inner side of the connecting nut (2), and the inner side of the connecting tube head (12) is threaded to the outer side of the tube core (3).

7. The DN15 double screw fixed-length pipe according to claim 1, characterized in that: The noise reduction and flow slowing mechanism includes a noise reduction cylinder (13). The outer side of the noise reduction cylinder (13) is fixedly connected to the inner side of the easily bendable part of the pipe body (1). Multiple air guide holes (15) are opened on the outer side of the fixing ring of the noise reduction cylinder (13). A buffer air inlet hole (14) is opened at one end of the noise reduction cylinder (13) close to the connecting nut (2). A wave-breaking noise reduction hole (20) is opened at one end of the noise reduction cylinder (13) away from the buffer air inlet hole (14).

8. The DN15 double screw fixed-length pipe according to claim 7, characterized in that: The inner side of the silencing cylinder (13) is provided with a silencing resonance cavity (16), the inner side of the silencing resonance cavity (16) is fixedly connected with a silencing cotton (17), the inner side of the silencing resonance cavity (16) is fixedly connected with a silencing slit plate (18), and the inner side of the silencing resonance cavity (16) is fixedly connected with a silencing fiber felt (19).

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