Water pipe anti-explosion connector
By setting up an air storage chamber inside the water pipe connector to store nitrogen, the problems of complex structure and high cost of existing water pipe explosion-proof mechanisms are solved, achieving explosion-proof effect of water pipe connectors in low-temperature environments, and reducing the difficulty of processing and installation.
Patent Information
- Application Number
- CN202520568374.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-28
- Publication Date
- 2026-01-13
- Estimated Expiration
- 2035-03-28
AI Technical Summary
Existing explosion-proof mechanisms for water pipes are complex in structure, difficult to manufacture, costly, and prone to bursting in low-temperature environments.
An air storage chamber is set inside the water pipe connector to store nitrogen to alleviate the pressure when freezing. The nitrogen is used to enter the gaps between ice crystals to reduce the impact of water freezing expansion on the connector.
It achieves water pipe connectors that are not prone to bursting in low-temperature environments, has a simple structure, is easy to process and install, has low cost, and has a significant explosion-proof effect.
Smart Images
Figure CN223794864U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of water pipe technology, specifically to an explosion-proof connector for water pipes. Background Technology
[0002] In modern buildings and industrial facilities, the safe operation of water pipe systems is crucial. Especially in cold regions or low-temperature environments, the water inside the pipes can freeze and expand, easily causing the pipes and their connectors to burst, resulting in serious property damage and safety hazards. Therefore, water pipe explosion-proof technology has always been a key area of focus in the industry.
[0003] Currently, most water pipe explosion-proof mechanisms on the market rely on rebound mechanisms to cope with the expansion pressure generated when water freezes. These rebound mechanisms typically consist of multiple complex components, including elastic elements, transmission parts, and precision control components. When water freezes and expands, the rebound mechanism absorbs some of the pressure through the deformation of the elastic element and disperses the force using the transmission parts, attempting to stabilize the gas pressure in the pipe and prevent bursting. However, this design has many insurmountable drawbacks.
[0004] From a structural complexity perspective, the multi-component combination of the rebound mechanism makes its overall structure extremely complex. Precise fit and installation between each component are required, placing extremely high demands on the manufacturing process. Any minute deviation can affect the performance of the rebound mechanism, rendering it ineffective in its explosion-proof function. During manufacturing, the complex structure translates to greater processing difficulty. The elastic element requires special materials and processes to ensure stable and reliable elastic properties; the transmission components require high-precision machining to guarantee accurate force transmission. This not only increases the technical difficulty of the production process but also significantly increases the scrap rate, further driving up production costs. Utility Model Content
[0005] To address the technical problems existing in the prior art, the purpose of this utility model is to provide a water pipe explosion-proof connector. After water is supplied, air is stored in the air storage chamber. The air contains 78% nitrogen, which is not easily soluble in water. When the water inside the connector body freezes, the nitrogen can enter the gaps in the ice crystal structure to relieve the pressure inside the pipe. Water needs space to expand when it freezes, and the ice can enter the air storage chamber, thus achieving the function that the connector is not easy to burst when freezing. The structure is simple, the assembly and installation are convenient, and the economic cost is low.
[0006] To achieve the above objectives, the present invention adopts the following technical solution:
[0007] An explosion-proof connector for water pipes includes a connector body, an inlet channel and an outlet channel inside the connector body, the inlet channel and the outlet channel being connected; the connector body has an inclined rod at the upper part of the inlet channel, an air storage cavity inside the inclined rod, the air storage cavity being connected to the inlet channel, and the air storage cavity being inclined upward.
[0008] As a preferred option, the water inlet channel is oriented horizontally, and the water outlet of the water outlet channel faces downwards.
[0009] As a preferred embodiment, the water inlet channel includes a main water passage section and a water passage cavity. The main water passage section is connected to the water passage cavity, and the water passage cavity is connected to the water outlet channel. The inner diameter of the water passage cavity is larger than the inner diameter of the main water passage section. The lower end of the air storage cavity is located at the main water passage section and is connected to the main water passage section.
[0010] As a preferred embodiment, the inlet end of the water inlet channel is equipped with an inlet pipe connection structure, and the outlet end of the water outlet channel is equipped with an outlet pipe connection structure.
[0011] As a preferred option, the water pipe explosion-proof connector also includes a water inlet acceleration joint, which is connected to the water inlet pipe connection structure. The water inlet acceleration joint is provided with a tapered section and a straight section. The inner diameter of the tapered section gradually decreases with the direction of water flow. The tapered section is connected to the straight section, and the straight section is connected to the water inlet channel.
[0012] As a preferred embodiment, the water inlet accelerator joint has a first external thread on its outer periphery, and the water inlet pipe connection structure has a first internal thread. The connection between the water inlet accelerator joint and the connector body is achieved by screwing the first external thread into the first internal thread.
[0013] As a preferred option, a guide surface is provided on the outer periphery of the water inlet accelerator joint near the straight section, and the guide surface is located inside the water inlet channel.
[0014] As a preferred option, the water pipe explosion-proof connector also includes a sealing ring. The outer diameter of the guide surface is smaller than the outer diameter of the first external thread. The sealing ring is fitted on the guide surface. The diameter of the first internal thread is larger than the inner diameter of the water inlet channel. The sealing ring is compressed between the water inlet acceleration connector and the connector body.
[0015] As a preferred option, a one-way pressurization valve is provided at the tail end of the air storage chamber.
[0016] As a preferred embodiment, the one-way pressurizing valve includes a pressurizing valve body, a valve core, a spring, and a support base. A through hole is opened at the tail end of the air storage chamber. The pressurizing valve body is tightly inserted into and welded to the through hole. A vent is opened inside the pressurizing valve body. The support base, spring, and valve core are arranged sequentially from the inside to the outside in the vent. The support base is fixedly connected to the bottom of the vent. A through air hole is opened inside the support base. The spring is compressed between the support base and the valve core. A blocking part is provided in the middle of the vent. The valve core abuts against the blocking part to block the vent. A second internal thread is opened at the upper part of the vent.
[0017] This utility model has the following advantages:
[0018] 1. By installing a slanted rod at the top of the water inlet channel within the connector body, and arranging an air storage chamber therein, with the air storage chamber facing upwards, air (78% nitrogen) is stored through the water inlet channel. When the water inside the connector body freezes, the nitrogen can enter the gaps in the ice crystal structure to relieve pressure within the pipe. Water needs space to expand upon freezing, allowing the ice to enter the air storage chamber, thus preventing the connector from bursting when frozen. The structure is simple, assembly and installation are convenient, and the economic cost is low.
[0019] 2. The inner diameter of the water passage chamber is larger than that of the main water passage section, allowing the water passage chamber to store more air. Due to the influence of dynamics and gravity, the water flow will preferentially flow to the lower part of the water passage chamber, rather than filling the upper part first. When the water flow returns and fills the upper part of the water passage chamber, it will squeeze the air in the upper part of the water passage chamber into the air storage chamber, thus allowing the air storage chamber to store more air. If the water freezes, more nitrogen will seep into the gaps in the ice crystal structure, making the connector and the water pipe connected to the connector less likely to be burst by the expansion of the water when it freezes. Attached Figure Description
[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0021] Figure 1 This is a schematic diagram of the connector body in Embodiment 1.
[0022] Figure 2 This is a schematic diagram of the connector body in Embodiment 2.
[0023] Figure 3 This is a schematic diagram of the explosion-proof connector for water pipes in Example 3.
[0024] Figure 4 This is a schematic diagram of the water inlet acceleration connector in Example 3.
[0025] Figure 5 This is a schematic diagram of the structure of the one-way pressurization valve installed at the tail end of the air storage chamber in Embodiment 4.
[0026] Figure 6 for Figure 5 Enlarged view of point A.
[0027] The components are as follows: 1. Connector body; 2. Water inlet channel; 3. Water outlet channel; 4. Diagonal rod; 5. Air storage chamber; 6. Water inlet pipe connection structure; 7. Water outlet pipe connection structure; 8. Main water passage section; 9. Water passage chamber; 10. Water inlet acceleration connector; 11. Gradual narrowing section; 12. Straight through section; 13. First external thread; 14. First internal thread; 15. Guide surface; 16. Sealing ring; 17. One-way pressure valve; 18. Pressure valve body; 19. Valve core; 20. Spring; 21. Support fixing seat; 22. Air passage; 23. Air hole; 24. Blocking part; 25. Second internal thread; 26. Chamfer; 27. Through hole; 28. Stop surface. Detailed Implementation
[0028] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and 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.
[0029] Example 1
[0030] like Figure 1As shown, a water pipe explosion-proof connector includes a connector body 1, with an inlet channel 2 and an outlet channel 3 inside the connector body 1, the inlet channel 2 and the outlet channel 3 being connected; the connector body 1 has a diagonal rod 4 above the inlet channel 2, and an air storage cavity 5 is provided inside the diagonal rod 4, the air storage cavity 5 being connected to the inlet channel 2, the elongated air storage cavity 5 being aligned with the diagonal rod 4, and the air storage cavity 5 being inclined upwards. The implementation principle of this application is that when the connector body 1 is initially empty and without water, the water inlet channel 2, water outlet channel 3, and air storage cavity 5 are all filled with air. When water initially flows from the water inlet channel 2 through the water outlet channel 3, the water flow drives the air in the water inlet channel 2 and the water outlet channel 3 to the outside. However, the density of air is less than that of water. Due to gravity, during the process of filling the water inlet channel 2 and the water outlet channel 3 with water, the air in the air storage cavity 5 is still stored in the air storage cavity 5. The water continues to compress the air in the air storage cavity 5 until the internal pressure of the entire connector body 1 is uniform. Because 78% of the air is nitrogen, nitrogen is not easily soluble in water at room temperature and low temperature, and nitrogen is not easily frozen. Therefore, under normal water temperature and water pressure, nitrogen occupies a certain space in the air storage cavity 5. As the temperature gradually decreases, the water in inlet channel 2 and outlet channel 3 freezes. The freezing process is relatively slow, and the ice crystals are formed by water molecules arranged according to certain rules. The crystal structure has gaps, causing the water to expand during freezing. When the water in contact with nitrogen also freezes, the nitrogen seeps into these gaps, providing space for the water to expand. To stabilize the internal pressure, the water enters the air storage chamber 5 to freeze, protecting the connector from being broken by the expansion of the ice. As the temperature rises, the ice slowly melts back into water, releasing nitrogen from the ice crystals. The nitrogen then rises and re-enters the air storage chamber 5.
[0031] Compared to existing water pipe explosion-proof mechanisms, the water pipe explosion-proof connector of this application has a simple structure, is easy to process and manufacture, is convenient to assemble and install, and has low economic cost. Air enters the gaps in the ice crystal structure through the air storage chamber 5. Water needs space to expand when it freezes, and the ice can enter the air storage chamber, achieving explosion-proof protection. Testing has shown that the explosion-proof effect is significant.
[0032] The water inlet channel 2 is oriented horizontally, and the angle between the water inlet channel 2 and the water outlet channel 3 is a right angle. The outlet of the water outlet channel 3 faces downward, which can change the direction of water flow. The end of the water inlet channel 2 is a baffle 28. When the water pipe is first connected to the explosion-proof connector, the water flows through the baffle 28 and then flows down through the water outlet channel 3, which can give the water flow a buffer process. After testing, the right angle between the water inlet channel 2 and the water outlet channel 3 can better store air in the air storage chamber 5.
[0033] The preferred angle of inclination of the air storage chamber 5 relative to the water inlet channel 2 is 30°. However, this application does not limit the angle of inclination of the air storage chamber 5 relative to the water inlet channel 2. The water pipe explosion-proof connector is usually a connector between multiple water pipes. After water pipes are installed in both the water inlet channel 2 and the water outlet channel 3 of the water pipe explosion-proof connector, the air storage chamber 5 is located above the water inlet channel 2. The angle of inclination of the air storage chamber 5 relative to the water inlet channel 2 is sufficient to enable the air to be stored in the air storage chamber 5 after water is supplied. All of these are within the protection scope of this application.
[0034] The inlet end of the water inlet channel 2 is provided with an inlet pipe connection structure 6, and the outlet end of the water outlet channel 3 is provided with an outlet pipe connection structure 7. Both the inlet pipe connection structure 6 and the outlet pipe connection structure 7 of this application are threaded connection structures, which can be internal threads or external threads. That is, the connection between the connector and the water pipe can be a threaded connection. Of course, this application is not limited to threaded connections. Clamp connections, heat fusion connections, capacitor connections, etc. can also be selected, all of which are within the protection scope of this application.
[0035] The connector body 1 is made of copper, stainless steel, or plastic.
[0036] Example 2
[0037] like Figure 2 As shown, the difference between this embodiment and Embodiment 1 is that the water inlet channel 2 includes a main water passage section 8 and a water passage cavity 9. The main water passage section 8 is connected to the water passage cavity 9, and the water passage cavity 9 is connected to the water outlet channel 3. The lower end of the air storage cavity 5 is located at the main water passage section 8 and is connected to the main water passage section 8. The inner diameter of the water passage cavity 9 is larger than the inner diameter of the main water passage section 8, so the water passage cavity 9 can store more air. Due to the action of power and gravity, the water flow will preferentially flow to the lower part of the water passage cavity 9, rather than preferentially filling the upper part of the water passage cavity 9. When the water flow returns and fills the upper part of the water passage cavity 9, it will squeeze the air in the upper part of the water passage cavity 9 into the air storage cavity 5, so that the air storage cavity 5 can store more nitrogen. When the water freezes, more nitrogen will penetrate into the gaps in the crystal structure of the ice crystal, so that the connector is not easily broken by the expansion of water freezing.
[0038] Example 3
[0039] like Figure 3 and Figure 4As shown, the difference between this embodiment and Embodiment 2 is that the water pipe explosion-proof connector also includes a water inlet acceleration connector 10. The water inlet acceleration connector 10 is connected to the water inlet pipe connection structure 6. The water inlet acceleration connector 10 is provided with a tapered section 11 and a straight section 12. The inner diameter of the tapered section 11 gradually decreases with the direction of water flow. The outlet of the tapered section 11 has the same inner diameter as the straight section 12. The tapered section 11 is connected to the straight section 12, and the straight section 12 is connected to the water inlet channel 2. The inlet accelerator joint 10 is used to connect to the inlet pipe. When the inlet accelerator joint 10 is connected to the inlet pipe, the converging section 11 is connected to the inlet pipe. Based on the continuity equation principle of the law of conservation of mass, for incompressible fluids (such as water), under steady flow conditions, the fluid flow rate through any cross-section of the pipe is the same. This means that in the narrower part of the pipe (where the cross-sectional area decreases), in order to maintain the same flow rate, the flow velocity increases. Therefore, the inner diameter of the converging section 11 in this application gradually decreases with the direction of water flow, and the water flow velocity gradually decreases. The constriction section 11 gradually widens along the water flow direction. Due to the increased water flow velocity, the water flows directly into the water cavity 9 through inertia, and will preferentially and quickly fill the water cavity 9 before returning to fill the main water passage section 8. That is, a certain amount of air will remain before the main water passage section 8 is filled. When the main water passage section 8 is also filled, the remaining air will be squeezed into the air storage cavity 5, so that the air storage cavity 5 can store more gas. This allows more nitrogen to seep into the gaps in the crystal structure of the ice crystals when the water freezes, thus making the connector less likely to be broken by the expansion of the water when it freezes.
[0040] The water inlet accelerator connector 10 has a first external thread 13 on its outer periphery, and the water inlet pipe connection structure 6 has a first internal thread 14. The water inlet accelerator connector 10 is connected to the connector body 1 by screwing the first external thread 13 into the first internal thread 14, which facilitates the assembly and disassembly of the water inlet accelerator connector 10. Only part of the first external thread 13 is screwed into the first internal thread 14, and the part of the first external thread 13 exposed is used for connection with the water inlet pipe.
[0041] A guide surface 15 is provided on the outer periphery of the water inlet accelerator connector 10 near the straight section 12, and the guide surface 15 is located inside the main water passage section 8. The guide surface 15 facilitates the installation of the water inlet accelerator connector 10. The guide surface 15 can assist the operator in quickly and accurately positioning the water inlet accelerator connector 10, so that the first external thread 13 can be smoothly screwed into the first internal thread 14, ensuring the guiding connection between the water inlet accelerator connector 10 and the connector body 1, and speeding up the installation. A chamfer 26 is provided on the inner side of the guide surface 15, which helps guide the guide surface 15 into the main water passage section 8.
[0042] The explosion-proof water pipe connector also includes a sealing ring 16. The outer diameter of the guide surface 15 is smaller than the outer diameter of the first external thread 13. The sealing ring 16 is fitted onto the guide surface 15. The diameter of the first internal thread 14 is larger than the inner diameter of the water inlet channel 2. The sealing ring 16 is compressed between the water inlet accelerator joint 10 and the connector body 1. The sealing ring 16 effectively prevents water leakage, ensuring a reliable sealing effect even under different air pressure environments. The outer diameter of the guide surface 15 is smaller than the outer diameter of the first external thread 13, and the diameter of the first internal thread 14 is larger than the inner diameter of the water inlet channel 2, providing sufficient compression space for the sealing ring 16 and ensuring a good sealing contact area.
[0043] The water inlet accelerator connector 10 is made of copper, stainless steel, or plastic.
[0044] Example 4
[0045] like Figure 5 and Figure 6 As shown, this embodiment differs from Embodiments 1, 2, and 3 in that a one-way pressure valve 17 is provided at the tail end of the air storage chamber 5. When the water in the water pipe explosion-proof connector freezes and the temperature rises and the ice melts, some of the nitrogen in the air storage chamber 5 may be carried away by the water flow due to internal pressure changes, resulting in a slight decrease in nitrogen compared to before. At this time, a certain amount of air is injected through the one-way pressure valve 17 to ensure sufficient nitrogen in the air storage chamber 5, preparing for the next water freezing explosion and ensuring that the water pipe explosion-proof connector and the water pipe connected to the connector are not easily burst by the expansion of the frozen water when the water freezes again.
[0046] The one-way pressurizing valve 17 includes a pressurizing valve body 18, a valve core 19, a spring 20, and a support base 21. A through hole 27 is opened at the tail end of the air storage chamber 5. The pressurizing valve body 18 is fixedly connected in the through hole 27. A through vent 22 is opened in the pressurizing valve body 18. The support base 21, spring 20, and valve core 19 are arranged sequentially from the inside to the outside in the vent 22. The support base 21 is fixedly connected to the bottom of the vent 22. A through vent hole 23 is opened in the support base 21. The spring 20 is compressed between the support base 21 and the valve core 19. A blocking part 24 is provided in the middle of the vent 22. The valve core 19 abuts against the blocking part 24 through the elastic force of the spring 20 to block the vent 22 and prevent the air in the air storage chamber 5 from escaping to the outside. A second internal thread 25 is opened at the upper part of the vent 22. When air needs to be added to the air storage chamber 5, the output end of the pressurizing device is threaded into the second internal thread 25, and air is added into the vent 22. Under pressure, the valve core 19 is pushed, and the spring 20 is further compressed, creating a gap between the valve core 19 and the blocking part 24. The pressurized air smoothly passes through the vent 22 and enters the air storage chamber 5. When the pressurizing device is released, the spring 20 rebounds, and the valve core 19 returns to its original position to block the vent 22. A sealing groove is opened on the side of the valve core 19 facing the blocking part 24, and a rubber ring is embedded in the sealing groove to enhance the sealing effect between the valve core 19 and the blocking part 24.
[0047] The present invention has been further described above with reference to specific embodiments. However, it should be understood that the specific description herein should not be construed as limiting the substance and scope of the present invention. Various modifications made by those skilled in the art to the above embodiments after reading this specification are all within the scope of protection of the present invention.
Claims
1. A water pipe explosion-proof connector, characterized in that: The connector body (1) includes a water inlet channel (2) and a water outlet channel (3) inside the connector body (1), and the water inlet channel (2) and the water outlet channel (3) are connected. The connector body (1) has a slanted rod (4) above the water inlet channel (2), and an air storage cavity (5) is provided inside the slanted rod (4), which is connected to the water inlet channel (2) and is oriented diagonally upward.
2. The explosion-proof connector for water pipes according to claim 1, characterized in that: The water inlet channel (2) is oriented horizontally, and the outlet of the water outlet channel (3) faces downward.
3. The explosion-proof connector for water pipes according to claim 2, characterized in that: The water inlet channel (2) includes a main water passage section (8) and a water passage cavity (9). The main water passage section (8) is connected to the water passage cavity (9), and the water passage cavity (9) is connected to the water outlet channel (3). The inner diameter of the water passage cavity (9) is larger than the inner diameter of the main water passage section (8). The lower end of the air storage cavity (5) is located at the main water passage section (8) and is connected to the main water passage section (8).
4. A water pipe explosion-proof connector according to any one of claims 2 or 3, characterized in that: The inlet end of the water inlet channel (2) is provided with an inlet pipe connection structure (6), and the outlet end of the water outlet channel (3) is provided with an outlet pipe connection structure (7).
5. The explosion-proof connector for water pipes according to claim 4, characterized in that: The water pipe explosion-proof connector also includes a water inlet acceleration connector (10), which is connected to the water inlet pipe connection structure (6). The water inlet acceleration connector (10) is provided with a tapered section (11) and a straight section (12). The inner diameter of the tapered section (11) gradually decreases with the direction of water flow. The tapered section (11) is connected to the straight section (12), and the straight section (12) is connected to the water inlet channel (2).
6. The explosion-proof connector for water pipes according to claim 5, characterized in that: The water inlet accelerator connector (10) has a first external thread (13) on its outer periphery and a first internal thread (14) for the water inlet pipe connection structure (6). The water inlet accelerator connector (10) is connected to the connector body (1) by screwing the first external thread (13) into the first internal thread (14).
7. The explosion-proof connector for water pipes according to claim 6, characterized in that: A guide surface (15) is provided on the outer periphery of the water inlet accelerator connector (10) near the straight section (12), and the guide surface (15) is located inside the water inlet channel (2).
8. The explosion-proof connector for water pipes according to claim 7, characterized in that: The water pipe explosion-proof connector also includes a sealing ring (16). The outer diameter of the guide surface (15) is smaller than the outer diameter of the first external thread (13). The sealing ring (16) is fitted on the guide surface (15). The diameter of the first internal thread (14) is larger than the inner diameter of the water inlet channel (2). The sealing ring (16) is compressed between the water inlet acceleration connector (10) and the connector body (1).
9. The explosion-proof connector for water pipes according to claim 1, characterized in that: A one-way pressurization valve (17) is provided at the tail end of the air storage chamber (5).
10. A water pipe explosion-proof connector according to claim 9, characterized in that: The one-way pressurization valve (17) includes a pressurization valve body (18), a valve core (19), a spring (20), and a support base (21). A through hole (27) is opened at the tail end of the air storage chamber (5). The pressurization valve body (18) is tightly inserted into and welded to the through hole (27). A vent (22) is opened inside the pressurization valve body (18). The support base (21), spring (20), and valve core (19) are arranged sequentially from the inside to the outside of the vent (22). Inside 22), the support fixing seat (21) is fixedly connected to the bottom of the air passage (22). A through air hole (23) is opened inside the support fixing seat (21). The spring (20) is compressed between the support fixing seat (21) and the valve core (19). A blocking part (24) is provided in the middle of the air passage (22). The valve core (19) abuts against the blocking part (24) to block the air passage (22). A second internal thread (25) is opened at the upper part of the air passage (22).