Water supply and drainage pipe joint with backflow prevention function

Abstract

This utility model relates to the field of pipe joint technology and discloses a water supply and drainage pipe joint with anti-backflow function. It includes a first connecting pipe, with a rubber pad fixedly connected to the inner wall of the first connecting pipe. A movable hole is opened at the top of the outer wall of the first connecting pipe, and a rotating shaft is fixedly connected to the inner wall of the movable hole. A locking block is rotatably connected to the outer wall of the rotating shaft, a fixing block is fixedly connected to the top of the locking block, and a connecting post is fixedly connected to the top of the fixing block. A pull ring is fixedly connected to the right end of the connecting post, and a second connecting pipe is slidably connected to the left end of the inner wall of the first connecting pipe. In this utility model, the inlet pipe is first inserted into the fixing pipe, the rotating rod is rotated to lock the fixing rod into the inlet pipe, and the pull ring is pulled upwards to rotate the locking block upwards. Then, the second connecting pipe is inserted into the first connecting pipe, the fixing pipe is rotated 90 degrees, and the pull ring is rotated back to its original position to lock the locking block into the limiting groove, thus achieving a quick and secure connection of the water pipe.

Description

Technical Field

[0001] This utility model relates to the field of pipe joint technology, and in particular to a water supply and drainage pipe joint with anti-backflow function. Background Technology

[0002] Backflow prevention is a device and system feature used to prevent fluid from flowing in the opposite direction. It is widely used in piping systems, HVAC, water treatment, and industrial pipelines. Its core function is to ensure the normal operation of the system, prevent pollution, and avoid equipment damage and performance degradation. Backflow prevention is an important part of ensuring the safe and efficient operation of fluid systems. The selection of a suitable backflow prevention device requires comprehensive consideration of factors such as system pressure, fluid properties, and safety level.

[0003] Backflow prevention is commonly used in pipe fittings. Existing water supply and drainage pipe fittings with backflow prevention function are a type of pipe connection that integrates backflow prevention devices. They can achieve a sealed connection of the pipe and prevent fluid from flowing backward. However, in use, water pipes are usually connected by screws and welding, which is inconvenient and requires tools. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a water supply and drainage pipe joint with anti-backflow function, which aims to improve the problem of inconvenient connection methods in the prior art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a water supply and drainage pipe joint with anti-backflow function, including a connecting pipe one, a rubber pad fixedly connected to the inner wall of the connecting pipe one, a movable hole opened at the top of the outer wall of the connecting pipe one, a rotating shaft fixedly connected to the inner wall of the movable hole, a locking block rotatably connected to the outer wall of the rotating shaft, a fixing block fixedly connected to the top of the locking block, a connecting column fixedly connected to the top of the fixing block, a pull ring fixedly connected to the right end of the connecting column, a connecting pipe two slidably connected to the left end of the inner wall of the connecting pipe one, a limit groove opened in the middle of the outer wall of the connecting pipe two, a sliding groove opened near the edge of the right end of the outer wall of the connecting pipe two, and an anti-backflow mechanism slidably connected to the right end of the inner wall of the connecting pipe one, the anti-backflow mechanism being used to prevent backflow of water pipes.

[0006] As a further description of the above technical solution:

[0007] The anti-backflow mechanism includes a filter plate, the outer wall of which is slidably connected to the inner wall of the connecting pipe. Multiple filter holes are provided at both ends of the filter plate. A fixing post is fixedly connected to the middle of the right end of the filter plate. A waterproof plate is fixedly connected to the right end of the fixing post. A fixing ring is fixedly connected to the middle of the outer wall of the fixing post. A spring is fixedly connected to the outer wall of the fixing ring. A fixing ring is fixedly connected to the right end of the spring. A water-locking groove is fixedly connected to the outer wall of the fixing ring. A limit hole is provided at the right end of the water-locking groove. Multiple water outlet holes are provided at the left end of the water-locking groove.

[0008] As a further description of the above technical solution:

[0009] The left end of the second connecting pipe is fixedly connected to a fixing pipe, and the top of the outer wall of the fixing pipe is threadedly connected to a fixing rod.

[0010] As a further description of the above technical solution:

[0011] A rotating rod is fixedly connected to the top of the fixing rod, an inlet pipe is slidably connected to the left end of the inner wall of the fixing tube, and an outlet pipe is slidably connected to the right end of the inner wall of the fixing tube.

[0012] As a further description of the above technical solution:

[0013] A connecting block is slidably connected to the outer wall of the connecting pipe, and channels are opened at both the left and right ends of the connecting block.

[0014] As a further description of the above technical solution:

[0015] The top of the connecting block is provided with a threaded hole, and a screw is threaded onto the inner wall of the threaded hole.

[0016] As a further description of the above technical solution:

[0017] A connecting plate is threadedly connected to the upper middle part of the outer wall of the screw, and a fixing ring is fixedly connected to both the left and right ends of the connecting plate.

[0018] As a further description of the above technical solution:

[0019] The outer wall of the fixed column is slidably connected to the inner wall of the water-locking groove, and the outer wall of the waterproof plate is slidably connected to the inner wall of the limiting hole.

[0020] This utility model has the following beneficial effects:

[0021] 1. In this utility model, when the device is normally connected to the water pipe, first insert the inlet pipe into the fixed pipe, rotate the rotating rod to move the fixed rod down and tightly lock the inlet pipe, then pull the pull ring upward to rotate the locking block to the semi-circle facing upward, then move the connecting pipe two along the sliding groove and the locking block in the direction of the locking block, insert it into the connecting pipe one, until its right end is in contact with the rubber pad, at this time rotate the fixed pipe ninety degrees so that the opening direction of the sliding groove is different from that of the locking block, then rotate the pull ring back to the original position to make the locking block and the limiting groove fully lock together, thus realizing the quick and firm connection of the water pipe without the need for tools, which speeds up the installation efficiency.

[0022] 2. In this utility model, water enters the device through the inlet pipe. When it passes through the connecting pipe, the impurities that may clog subsequent parts are first filtered out by the filter holes of the filter plate inside the pipe. Then, the water lock groove is flushed, and the waterproof plate is squeezed from the outlet hole. Under the action of water pressure, the water flow pushes the waterproof plate to the right, causing it to leave the limiting hole. At this time, the water flow can enter the outlet pipe through the outlet hole. When the water stops and backflow occurs, the spring will pull back the waterproof plate, causing it to return to the limiting hole, thus preventing the water from flowing back through the outlet hole. The greater the backflow water pressure, the stronger the blockage, thereby achieving the backflow prevention function. Attached Figure Description

[0023] Figure 1 This is a front perspective view of the water supply and drainage pipe joint with anti-backflow function proposed in this utility model.

[0024] Figure 2 This is a partial structural exploded view of the sliding groove of the water supply and drainage pipe joint with anti-backflow function proposed in this utility model.

[0025] Figure 3 for Figure 2 Enlarged view of point A in the image;

[0026] Figure 4 This is a partial structural diagram of the water-locking groove of the water supply and drainage pipe joint with anti-backflow function proposed in this utility model.

[0027] Figure 5 This is a partial structural exploded view of the waterproof plate of the water supply and drainage pipe joint with anti-backflow function proposed in this utility model.

[0028] Figure 6 This is a partial structural disassembly diagram of the connecting block of the water supply and drainage pipe joint with anti-backflow function proposed in this utility model.

[0029] Legend:

[0030] 1. Connecting pipe one; 2. Anti-backflow mechanism; 201. Filter plate; 202. Filter hole; 203. Fixing column; 204. Waterproof plate; 205. Fixing ring one; 206. Spring; 207. Fixing ring two; 208. Water-locking groove; 209. Limiting hole; 210. Water outlet hole; 3. Rubber pad; 4. Movable hole; 5. Rotating shaft; 6. Locking block; 7. Fixing block; 8. Connecting column; 9. Pull ring; 10. Connecting pipe two; 11. Limiting groove; 12. Sliding groove; 13. Fixing pipe; 14. Fixing rod; 15. Rotating rod; 16. Water inlet pipe; 17. Water outlet pipe; 18. Connecting block; 19. Channel; 20. Threaded hole; 21. Screw; 22. Connecting plate; 23. Fixing ring three. Detailed Implementation

[0031] 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.

[0032] Please see the appendix Figure 2 and attached Figure 3 An embodiment of this utility model provides a water supply and drainage pipe joint with anti-backflow function, including a connecting pipe 1, a rubber pad 3 fixedly connected to the inner wall of the connecting pipe 1, a movable hole 4 opened at the top of the outer wall of the connecting pipe 1, a rotating shaft 5 fixedly connected to the inner wall of the movable hole 4, a locking block 6 rotatably connected to the outer wall of the rotating shaft 5, a fixing block 7 fixedly connected to the top of the locking block 6, a connecting column 8 fixedly connected to the top of the fixing block 7, a pull ring 9 fixedly connected to the right end of the connecting column 8, a connecting pipe 2 10 slidably connected to the left end of the inner wall of the connecting pipe 1, a limit groove 11 opened in the middle of the outer wall of the connecting pipe 2 10, a sliding groove 12 opened near the edge of the right end of the outer wall of the connecting pipe 2 10, and an anti-backflow mechanism 2 slidably connected to the right end of the inner wall of the connecting pipe 1, the anti-backflow mechanism 2 being used to prevent backflow of water pipes;

[0033] Specifically, the connecting pipe 1 serves as the main body, and the rubber pad 3 fixed to its inner wall enhances the sealing with the connecting pipe 2 10. The movable hole 4 at the top of the outer wall of the connecting pipe 1 is fixed with a rotating shaft 5, which provides a fulcrum for the locking block 6. The locking block 6 is connected to the pull ring 9 through the fixed block 7 at the top and the connecting post 8. Pulling and rotating the pull ring 9 can drive the locking block 6 to rotate. The left end of the connecting pipe 2 10 is slidably inserted into the connecting pipe 1, and the limiting groove 11 in the middle is used to lock and fix it with the locking block 6. The sliding groove 12 on the right edge provides sliding guidance for the locking block 6. The anti-backflow mechanism 2 slidably connected to the right end of the connecting pipe 1 has the function of preventing water backflow. These structures work together to achieve a stable connection and anti-backflow effect for the pipe.

[0034] Please see the appendix Figure 4 and attached Figure 5 The anti-backflow mechanism 2 includes a filter plate 201. The outer wall of the filter plate 201 is slidably connected to the inner wall of the connecting pipe 1. Multiple filter holes 202 are provided at both the left and right ends of the filter plate 201. A fixing post 203 is fixedly connected to the middle of the right end of the filter plate 201. A waterproof plate 204 is fixedly connected to the right end of the fixing post 203. A fixing ring 205 is fixedly connected to the middle of the outer wall of the fixing post 203. A spring 206 is fixedly connected to the outer wall of the fixing ring 205. A fixing ring 207 is fixedly connected to the right end of the spring 206. A water-locking groove 208 is fixedly connected to the outer wall of the fixing ring 207. A limit hole 209 is provided at the right end of the water-locking groove 208. Multiple water outlet holes 210 are provided at the left end of the water-locking groove 208.

[0035] Specifically, in the anti-backflow mechanism 2, the outer wall of the filter plate 201 is slidably connected to the inner wall of the connecting pipe 1. Multiple filter holes 202 at its left and right ends can filter impurities in the water flow. The fixing column 203 in the middle of the right end of the filter plate 201 is connected to the waterproof plate 204, which plays a role in fixing and supporting. A spring 206 is connected between the fixing ring 205 in the middle of the outer wall of the fixing column 203 and the fixing ring 207 in the outer wall of the water-locking groove 208, forming an elastic reset structure. The limiting hole 209 at the right end of the water-locking groove 208 cooperates with the waterproof plate 204 to control the opening and closing of the water flow path. Multiple water outlet holes 210 at the left end provide a flow path for the water flow. These structures work together to filter impurities, push the waterproof plate 204 to move to achieve water flow, and prevent backflow by the spring 206 pulling the waterproof plate 204 to reset and block the limiting hole 209.

[0036] Please see the appendix Figure 1 and attached Figure 6A fixed pipe 13 is fixedly connected to the left end of the connecting pipe 2 10. A fixed rod 14 is threadedly connected to the top of the outer wall of the fixed pipe 13. A rotating rod 15 is fixedly connected to the top of the fixed rod 14. A water inlet pipe 16 is slidably connected to the left end of the inner wall of the fixed pipe 13. A water outlet pipe 17 is slidably connected to the right end of the inner wall of the fixed pipe 13. A connecting block 18 is slidably connected to the outer wall of the connecting pipe 11. Channels 19 are opened at both the left and right ends of the connecting block 18.

[0037] Specifically, the fixing pipe 13 fixed at the left end of the connecting pipe 2 10 has an inner wall on which the water inlet pipe 16 can be slidably connected at the left end and the water outlet pipe 17 can be slidably connected at the right end, serving to support and connect the water inlet and outlet pipes 17. The fixing rod 14 threaded at the top of the outer wall of the fixing pipe 13 can move up and down to lock and release the water inlet pipe 16 when the rotating rod 15 at the top is rotated, realizing the fixing and disassembly of the water inlet pipe 16. The connecting block 18 slidably connected to the outer wall of the connecting pipe 1 has channels 19 at its left and right ends that can serve as auxiliary connection channels for external pipelines, enhancing the adaptability of the joint. These structures work together to further improve the fixing method and connection function of the pipeline.

[0038] Please see the appendix Figure 5 and attached Figure 6 The top of the connecting block 18 is provided with a threaded hole 20, and a screw 21 is threadedly connected to the inner wall of the threaded hole 20. A connecting plate 22 is threadedly connected to the upper part of the outer wall of the screw 21. A fixing ring 23 is fixedly connected to both the left and right ends of the connecting plate 22. The outer wall of the fixing column 203 is slidably connected to the inner wall of the water-locking groove 208. The outer wall of the waterproof plate 204 is slidably connected to the inner wall of the limiting hole 209.

[0039] Specifically, the threaded hole 20 at the top of the connecting block 18 is threaded into the screw 21. The position of the connecting plate 22 can be adjusted by rotating the screw 21. The fixing rings 23 at the left and right ends of the connecting plate 22 can be used to fix external pipes or components, enhancing the stability of the overall structure. In addition, the outer wall of the fixing column 203 slides into the inner wall of the water-locking groove 208, providing guidance for the movement of the waterproof plate 204. The outer wall of the waterproof plate 204 slides into the inner wall of the limiting hole 209, ensuring that the waterproof plate 204 can be accurately inserted into and removed from the limiting hole 209, ensuring the normal realization of the anti-backflow function. These structural combinations further improve the fixing flexibility of the joint and the operating accuracy of the anti-backflow mechanism 2.

[0040] Working principle: When the device is in normal use and the water pipe is connected, insert the inlet pipe 16 into the fixed pipe 13, then rotate the rotating rod 15 so that the fixed rod 14 gradually moves down until the inlet pipe 16 is tightly engaged. Then pull the pull ring 9 upward, so that the engaging block 6 rotates to the semi-circle facing upward. Then move the connecting pipe 10 along the sliding groove 12 and the engaging block 6 in the direction of engagement and sliding, so as to insert it into the connecting pipe 1 until the right end of the connecting pipe 10 is in contact with the rubber pad 3. At this time, rotate the fixed pipe 13 ninety degrees so that the opening direction of the sliding groove 12 is different from that of the engaging block 6. Then rotate the pull ring 9 back to its original position, so that the engaging block 6 and the limiting groove 11 are fully engaged, thus realizing the device to quickly and firmly connect the water pipe.

[0041] When water flows into the device through the inlet pipe 16, it first passes through the filter plate 201 inside the connecting pipe 1 and filters out impurities that could easily clog subsequent parts through the filter holes 202. Then, it flushes the water lock groove 208 and squeezes the waterproof plate 204 through the outlet hole 210. Under the action of water pressure, the water flow pushes the waterproof plate 204 to the right, thereby causing the waterproof plate 204 to leave the limiting hole 209. At this time, the water flow can enter the outlet pipe 17 through the outlet hole 210. When the water stops and there is water backflow, the spring 206 pulls the waterproof plate 204 back to the limiting hole 209, thereby blocking the water from flowing back through the outlet hole 210. The greater the backflow water pressure, the stronger the blockage, thus achieving anti-backflow.

[0042] 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 water supply and drainage pipe joint with anti-backflow function, comprising a connecting pipe (1), characterized in that: A rubber pad (3) is fixedly connected to the inner wall of the first connecting pipe (1). A movable hole (4) is opened at the top of the outer wall of the first connecting pipe (1). A rotating shaft (5) is fixedly connected to the inner wall of the movable hole (4). A locking block (6) is rotatably connected to the outer wall of the rotating shaft (5). A fixing block (7) is fixedly connected to the top of the locking block (6). A connecting column (8) is fixedly connected to the top of the fixing block (7). A pull ring (9) is fixedly connected to the right end of the connecting column (8). A second connecting pipe (10) is slidably connected to the left end of the inner wall of the first connecting pipe (1). A limit groove (11) is opened in the middle of the outer wall of the second connecting pipe (10). A sliding groove (12) is opened near the edge of the right end of the outer wall of the second connecting pipe (10). An anti-backflow mechanism (2) is slidably connected to the right end of the inner wall of the first connecting pipe (1). The anti-backflow mechanism (2) is used to prevent backflow of water pipes.

2. The water supply and drainage pipe joint with anti-backflow function according to claim 1, characterized in that: The anti-backflow mechanism (2) includes a filter plate (201). The outer wall of the filter plate (201) is slidably connected to the inner wall of the connecting pipe (1). Multiple filter holes (202) are provided at both the left and right ends of the filter plate (201). A fixing column (203) is fixedly connected to the middle of the right end of the filter plate (201). A waterproof plate (204) is fixedly connected to the right end of the fixing column (203). A fixing ring (205) is fixedly connected to the middle of the outer wall of the fixing column (203). A spring (206) is fixedly connected to the outer wall of the fixing ring (205). A fixing ring (207) is fixedly connected to the right end of the spring (206). A water-locking groove (208) is fixedly connected to the outer wall of the fixing ring (207). A limit hole (209) is provided at the right end of the water-locking groove (208). Multiple water outlet holes (210) are provided at the left end of the water-locking groove (208).

3. The water supply and drainage pipe joint with anti-backflow function according to claim 1, characterized in that: The left end of the connecting pipe 2 (10) is fixedly connected to a fixing pipe (13), and the top of the outer wall of the fixing pipe (13) is threadedly connected to a fixing rod (14).

4. The water supply and drainage pipe joint with anti-backflow function according to claim 3, characterized in that: The top of the fixed rod (14) is fixedly connected to a rotating rod (15), the left end of the inner wall of the fixed tube (13) is slidably connected to a water inlet pipe (16), and the right end of the inner wall of the fixed tube (13) is slidably connected to a water outlet pipe (17).

5. The water supply and drainage pipe joint with anti-backflow function according to claim 1, characterized in that: The outer wall of the connecting pipe (1) is slidably connected to a connecting block (18), and channels (19) are opened at both the left and right ends of the connecting block (18).

6. The water supply and drainage pipe joint with anti-backflow function according to claim 5, characterized in that: The top of the connecting block (18) is provided with a threaded hole (20), and a screw (21) is threadedly connected to the inner wall of the threaded hole (20).

7. The water supply and drainage pipe joint with anti-backflow function according to claim 6, characterized in that: The upper part of the outer wall of the screw (21) is threaded with a connecting plate (22), and the left and right ends of the connecting plate (22) are fixedly connected with fixing rings (23).

8. The water supply and drainage pipe joint with anti-backflow function according to claim 2, characterized in that: The outer wall of the fixed column (203) is slidably connected to the inner wall of the water-locking groove (208), and the outer wall of the waterproof plate (204) is slidably connected to the inner wall of the limiting hole (209).

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