Anti-reflux valve of water conservancy pipeline

Abstract

The utility model relates to the technical field of valves, and discloses an anti-reflux valve of a water conservancy pipeline, which comprises a valve body, one side surface of the valve body is communicated with a water inlet pipe, the other side surface of the valve body is communicated with a water outlet pipe, a fixed disc is fixedly connected between the inner walls of the valve body, and the fixed disc is fixedly connected with the valve body. A water permeable hole is formed in the surface of the fixing disc, a sealing disc is fixedly connected between the inner walls of the valve body, a sliding groove is formed in the surface of the sealing disc, a vertical rod is slidably connected into the sliding groove in a sleeved mode, and the bottom end of the vertical rod extends into the water permeable hole and is fixedly connected with a sealing plug. When the valve is used, the spring can be adjusted, so that the valve is suitable for being used under the condition of different water pressure intensities, meanwhile, the filter plate can be automatically cleaned, blockage is avoided, and the drainage effect is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to an anti-backflow valve for water conservancy pipelines. Background Art

[0002] A valve is a device used to control the direction, pressure, and flow of a fluid in a fluid system. It is a device that allows the medium (liquid, gas, powder) in pipes and equipment to flow or stop and control its flow. A valve is a control component in a pipeline fluid transportation system, used to change the cross-section of the passage and the direction of medium flow. It has functions such as diversion, cut-off, throttling, check, diversion, or overflow pressure relief.

[0003] A search of the announcement number CN 211259748 U reveals a backflow prevention valve for water conservancy pipelines. The valve comprises a housing, the left side of the housing being fixedly connected to a water inlet, the left inner sidewall of the housing being fixedly connected to a valve, the right side of the housing being fixedly connected to a water outlet, and the right inner sidewall of the housing being fixedly connected to two fixed blocks. The left ends of the two fixed blocks, which are adjacent to each other, are each fixedly connected to a first threaded pipe. The first threaded pipe's internal threads are connected to a first threaded rod, which passes through the first threaded pipe and extends into the interior of the fixed block. The end of the first threaded rod, which is remote from the fixed block, is threadedly connected to a filter. The bottom of the housing has a groove, and the bottom of the groove is provided with a baffle. The interior of each end of the baffle is fixedly connected to a second threaded pipe, and the upper portion of the second threaded pipe is threadedly connected to a second threaded rod. This backflow prevention valve for water conservancy pipelines has the advantages of simple structure and anti-blocking properties, solving the problem of difficult repair of blocked water conservancy pipelines.

[0004] However, the above valve still has some shortcomings during use. When filtering impurities in the water flow, some of the impurities will stick to the filter plate and cannot be cleaned in time, causing the filter plate to be blocked and affecting drainage. At the same time, it cannot be adjusted, which is not conducive to adapting to different water pressures. Utility Model Content

[0005] In response to the shortcomings of the existing technology, the utility model provides a backflow prevention valve for water pipelines, which solves the problem that when filtering impurities in the water flow, some impurities will stick to the filter plate and cannot be cleaned in time, causing the filter plate to be blocked, affecting drainage, and the valve cannot be adjusted, which is not conducive to adapting to different water pressures.

[0006] The utility model provides the following technical solution: a backflow prevention valve for a water conservancy pipeline, comprising a valve body, one side of the valve body is connected to a water inlet pipe, and the other side of the valve body is connected to a water outlet pipe, a fixed disk is fixedly connected between the inner walls of the valve body, a water permeable hole is opened on the surface of the fixed disk, a sealing disk is fixedly connected between the inner walls of the valve body, a slide groove is opened on the surface of the sealing disk, a vertical rod is slidably sleeved on the inside of the slide groove, the bottom end of the vertical rod extends to the inside of the water permeable hole and is fixedly connected to a sealing plug, the top of the vertical rod is fixedly connected to a connecting plate, a group of springs are fixedly connected between the lower surface of the connecting plate and the upper surface of the sealing disk, an adjusting component is provided on the upper part of the valve body, a filter plate is fixedly connected between the inner walls of the outlet pipe, and the lower surface of the outlet pipe is connected to a collecting box.

[0007] Preferred technical solution 1: The adjusting component includes a threaded hole and two limiting holes opened at the top of the valve body, the internal thread of the threaded hole is threaded with a screw rod, the bottom end of the screw rod is rotatably connected to the connecting plate, and the interiors of the two limiting holes are slidably sleeved with limiting rods, and the two limiting rods are fixedly connected to the connecting plate.

[0008] Preferred technical solution two: the surface of the filter plate is rotatably connected to a rotating rod, the surface of the rotating rod is fixedly connected to two scrapers, both of the scrapers are attached to the filter plate, and one end of the rotating rod extends to the other side of the filter plate and is fixedly connected to an impeller.

[0009] Preferred technical solution three: The lower surface of the collecting box is connected to a discharge pipe, and the bottom end of the discharge pipe is provided with a collecting cylinder.

[0010] Preferred technical solution four: The top of the collecting cylinder is fixedly connected with a connecting pipe, the inner wall of the connecting pipe is provided with an internal thread, the surface of the discharge pipe is provided with an external thread matching the internal thread, and the collecting cylinder is threadedly connected to the discharge pipe through the connecting pipe.

[0011] Preferred technical solution five: a connecting flange is fixedly installed at one end of the water inlet pipe and the water outlet pipe.

[0012] Compared with the prior art, the utility model provides a backflow prevention valve for a water conservancy pipeline, which has the following beneficial effects: when in use, the water inlet pipe and the water outlet pipe are connected to the external pipe through the connecting flange; when water flows into the water inlet pipe, the internal pressure increases and squeezes the sealing plug, causing it to move downward to expose the water permeable hole, and then the water can be transported to the outlet pipe for output; at the same time, some impurities contained in the water are filtered through the filter plate, and some large particles of impurities will fall into the inside of the collection box under the action of their own gravity, and some impurities will adhere to the surface of the filter plate. At this time, the water flow impacts the impeller and drives the scraper to scrape off the impurities adhered to the filter plate, thereby ensuring the water permeability of the filter plate and avoiding clogging; when the water flow is closed, the internal pressure of the valve body is reduced and the sealing plug re-closes the water permeable hole to prevent backflow; at the same time, some smaller particles of impurities will also fall into the inside of the collection box when the water flow is closed, which is convenient for collection and subsequent cleaning; at the same time, by rotating the screw rod to drive the connecting plate to move up and down, the expansion and contraction degree of the spring can be adjusted, so that it can adapt to different water pressures to achieve the purpose of preventing backflow. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural diagram of the utility model;

[0014] Figure 2 This is a cross-sectional exploded view of the internal structure of the valve body of the present utility model;

[0015] Figure 3 This is a cross-sectional exploded view of the internal structure of the water outlet pipe of the present invention.

[0016] In the figure: 1. Valve body; 2. Water inlet pipe; 3. Water outlet pipe; 4. Fixed plate; 5. Sealing plate; 6. Slide groove; 7. Vertical rod; 8. Sealing plug; 9. Connecting plate; 10. Spring; 11. Filter plate; 12. Collecting box; 13. Threaded hole; 14. Limiting hole; 15. Screw rod; 16. Limiting rod; 17. Rotating rod; 18. Scraper; 19. Discharge pipe; 20. Collecting cylinder; 21. Connecting pipe; 22. Impeller. DETAILED DESCRIPTION

[0017] See also Figure 1-3 ,

[0018] Embodiment 1: A backflow prevention valve for a water conservancy pipeline, comprising a valve body 1, one side of the valve body 1 is connected to a water inlet pipe 2, the other side of the valve body 1 is connected to a water outlet pipe 3, a fixed disk 4 is fixedly connected between the inner walls of the valve body 1, a water permeable hole is provided on the surface of the fixed disk 4, a sealing disk 5 is fixedly connected between the inner walls of the valve body 1, a slide groove 6 is provided on the surface of the sealing disk 5, a vertical rod 7 is slidably sleeved inside the slide groove 6, the bottom end of the vertical rod 7 extends to the inside of the water permeable hole and is fixedly connected to a sealing plug 8, the top of the vertical rod 7 is fixedly connected to a connecting plate 9, a group of springs 10 are fixedly connected between the lower surface of the connecting plate 9 and the upper surface of the sealing disk 5, an adjusting component is provided on the upper part of the valve body 1, a filter plate 11 is fixedly connected between the inner walls of the outlet pipe 3, and a collecting box 12 is connected to the lower surface of the outlet pipe 3.

[0019] Embodiment 2: The difference between this embodiment and embodiment 1 is that the adjusting component includes a threaded hole 13 and two limiting holes 14 opened at the top of the valve body 1, the internal thread of the threaded hole 13 is connected with a screw rod 15, the bottom end of the screw rod 15 is rotatably connected to the connecting plate 9, the interior of the two limiting holes 14 are both slidably connected with limiting rods 16, and the two limiting rods 16 are fixedly connected to the connecting plate 9. The degree of expansion and contraction of the spring 10 can be adjusted through the adjusting component to adapt to use under different water pressures.

[0020] Example 3: The difference between this example and Example 1 is that, the surface of the filter plate 11 is rotatably connected to a rotating rod 17, and the surface of the rotating rod 17 is fixedly connected to two scrapers 18, both of which are attached to the filter plate 11. One end of the rotating rod 17 extends to the other side of the filter plate 11 and is fixedly connected to an impeller 22. The water flow impacts the impeller 22, driving the scrapers 18 to clean the impurities adhering to the filter plate 10.

[0021] Example 4: The difference between this example and Example 1 is that the lower surface of the collecting box 12 is connected to a discharge pipe 19, and a collecting cylinder 20 is provided at the bottom end of the discharge pipe 19 to facilitate the collection of impurities and facilitate subsequent cleaning.

[0022] Example 5: The difference between this example and Example 1 is that the top of the collecting cylinder 20 is fixedly connected with a connecting pipe 21, the inner wall of the connecting pipe 21 is provided with an internal thread, and the surface of the discharge pipe 19 is provided with an external thread matching the internal thread. The collecting cylinder 20 is threadedly connected to the discharge pipe 19 through the connecting pipe 21, which makes it convenient to remove the collecting cylinder 20 from the collecting box 12 and clean the stored impurities.

[0023] Example 6: The difference between this example and Example 1 is that one end of the water inlet pipe 2 and the water outlet pipe 3 are fixedly installed with a connecting flange, which facilitates the connection of the water inlet pipe 2 and the water outlet pipe 3 to the external pipeline.

[0024] In summary, when the anti-backflow valve of the water conservancy pipeline is used, the water inlet pipe 2 and the water outlet pipe 3 are connected to the external pipe through the connecting flange. When water enters the water inlet pipe 2, the internal pressure increases and squeezes the sealing plug 8, causing it to move downward to expose the water permeable hole, and then the water can be transported to the outlet pipe 3 for output. At the same time, some impurities contained in the water are filtered through the filter plate 11. Some large particles of impurities will fall into the inside of the collection box 12 under the action of their own gravity, and some impurities will adhere to the surface of the filter plate 11. At this time, the water flow impacts the impeller 22 to rotate. The scraper 18 is driven by the movement to scrape off the impurities adhering to the filter plate 11, ensuring the water permeability of the filter plate 10 and avoiding blockage. When the water flow is closed, the internal pressure of the valve body 1 is reduced and the sealing plug 8 re-seals the water permeable hole to avoid backflow. At the same time, some smaller particulate impurities will also fall into the interior of the collection box 12 when the water flow is closed, which is convenient for collection and subsequent cleaning. At the same time, by rotating the screw rod 15 to drive the connecting plate 9 to move up and down, the expansion and contraction degree of the spring 10 can be adjusted to adapt to different water pressures and achieve the purpose of preventing backflow.

Claims

1. A backflow prevention valve for a water conservancy pipeline, comprising a valve body (1), characterized in that: One side of the valve body (1) is connected to a water inlet pipe (2), and the other side of the valve body (1) is connected to a water outlet pipe (3). A fixed disk (4) is fixedly connected between the inner walls of the valve body (1), and a water permeable hole is provided on the surface of the fixed disk (4). A sealing disk (5) is fixedly connected between the inner walls of the valve body (1), and a sliding groove (6) is provided on the surface of the sealing disk (5). A vertical rod (7) is slidably sleeved inside the sliding groove (6), and the bottom end of the vertical rod (7) extends to the inside of the water permeable hole and is fixedly connected to a sealing plug (8). The top end of the vertical rod (7) is fixedly connected to a connecting plate (9), and a group of springs (10) are fixedly connected between the lower surface of the connecting plate (9) and the upper surface of the sealing disk (5). An adjusting component is provided on the upper part of the valve body (1), a filter plate (11) is fixedly connected between the inner walls of the water outlet pipe (3), and a collecting box (12) is connected to the lower surface of the water outlet pipe (3).

2. The anti-backflow valve for a water conservancy pipeline according to claim 1, characterized in that: The regulating assembly comprises a threaded hole (13) and two limiting holes (14) provided at the top end of the valve body (1); a screw rod (15) is threadedly sleeved inside the threaded hole (13); the bottom end of the screw rod (15) is rotatably connected to the connecting plate (9); limiting rods (16) are slidably sleeved inside the two limiting holes (14); and the two limiting rods (16) are fixedly connected to the connecting plate (9).

3. The anti-backflow valve for a water conservancy pipeline according to claim 1, characterized in that: The surface of the filter plate (11) is rotatably connected to a rotating rod (17), and the surface of the rotating rod (17) is fixedly connected to two scrapers (18), both of which are in contact with the filter plate (11). One end of the rotating rod (17) extends to the other side of the filter plate (11) and is fixedly connected to an impeller (22).

4. The anti-backflow valve for a water conservancy pipeline according to claim 1, characterized in that: The lower surface of the collecting box (12) is connected to a discharge pipe (19), and the bottom end of the discharge pipe (19) is provided with a collecting cylinder (20).

5. The anti-backflow valve for a water conservancy pipeline according to claim 4, characterized in that: The top end of the collecting cylinder (20) is fixedly connected to a connecting pipe (21), the inner wall of the connecting pipe (21) is provided with an internal thread, the surface of the discharge pipe (19) is provided with an external thread matching the internal thread, and the collecting cylinder (20) is threadedly connected to the discharge pipe (19) through the connecting pipe (21).

6. The anti-backflow valve for a water conservancy pipeline according to claim 1, characterized in that: One end of the water inlet pipe (2) and the water outlet pipe (3) is fixedly mounted with a connecting flange.

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