Valve accessory capable of stopping backwater

Abstract

The utility model relates to the technical field of valve accessories, and discloses a valve accessory capable of stopping return water, which comprises a water inlet pipe and a valve body, a connecting pipe is in threaded connection with the inside of the valve body, a valve groove is arranged in the middle of the inner wall of the valve body, and a limit block is attached to the inner wall of the valve groove. According to the valve accessory capable of stopping return water, through the arrangement of the structure, the valve groove can be effectively pressed, water backflow is prevented, the connecting pipe is installed in the valve body, the water inlet pipe is connected with a water source, water flows into the water pipe, the water pump is started to enable the water to flow into the conveying pipe, and the water is filtered through the filter cotton; the limiting block is flushed backwards through the impact force of water flow generated by water pressure, so that the limiting block is driven to abut against the inner wall of the valve groove, and when water in the water outlet groove flows back, reverse water pressure is generated to press the limiting block towards the valve groove, so that the anti-backflow and anti-leakage performance is high, and the problem that when a water pump is closed and water inflow is stopped, purified water and non-purified water are fused, and the service life of the water pump is prolonged is solved. The use is influenced.

Description

Technical Field

[0001] This utility model relates to the field of valve fittings technology, specifically to a valve fitting that can prevent backflow. Background Technology

[0002] The check valve function is to prevent backflow of the medium in a pipeline, that is, to prevent the medium from flowing in the opposite direction along the pipeline. It allows the medium to flow in one direction and closes when it flows in the opposite direction. Common types include swing check valves, lift check valves, and swing check valves. Swing and lift check valves are suitable for most general applications, while swing check valves are often used in situations requiring a smaller pressure drop.

[0003] According to a valve fitting for preventing backflow of water with application number 201822092554.5, the solution solves the problem that the check valve assembly is equipped with a sealing ball valve, a sealing spring and a sealing ring to play the role of preventing backflow.

[0004] In the process of developing this application, the inventors discovered at least the following problems in the technology:

[0005] 1. In the existing technology, this type of device is used frequently, including for controlling water usage at home. The existing device is too simple and cannot truly achieve the function of preventing backflow. When the water pressure decreases, water flows back, causing purified water to mix with non-purified water, which affects its use.

[0006] 2. Due to the high frequency of use of water valves, they are prone to damage over time. However, the existing devices cannot be disassembled and reassembled easily, and the pipeline needs to be cut off during maintenance, which is very inconvenient. Utility Model Content

[0007] To address the shortcomings of existing technologies, this utility model provides a valve accessory that can prevent backflow, which has the advantage of pressing against the valve groove to prevent water backflow, thus solving the problems mentioned in the background art.

[0008] This utility model provides the following technical solution: a valve accessory that can prevent backflow, comprising: an inlet pipe and a valve body, a connecting pipe being threadedly connected to the inside of the valve body, a valve groove being provided in the middle of the inner wall of the valve body, a limiting block being fitted to the inner wall of the valve groove, a spring being fixedly connected to the bottom of the limiting block, a fixing strip being inserted into the bottom of the spring, second bolts being threadedly connected to both sides of the valve body, and an outlet groove being provided at one end of the valve body.

[0009] Preferably, the second bolt passes through the valve body and connects to the connecting pipe, and plug-in blocks are respectively snapped into both sides of the fixing strip. Connecting plates are respectively provided on both sides of the valve body, and two connecting posts are inserted into the inside of the connecting plate.

[0010] Preferably, the connecting column passes through the connecting plate and is connected to the interior of the valve body, and one end of the water inlet pipe is fixedly connected to a pump box, the pump box being equipped with a water pump.

[0011] Preferably, a delivery pipe is fixedly connected to the left side of the pump box, a filter cotton is inserted into the inner wall of one end of the delivery pipe, and a snap-fit ​​plate is fixedly connected to one side of the filter cotton.

[0012] Preferably, a first locking block is fixedly connected to both sides of the locking plate, and two side blocks are fixedly connected to the right side of the first locking block.

[0013] Preferably, a second locking block is fixedly connected to each side of the connecting pipe, and a first bolt is threadedly connected to the internal threads of the first locking block and the second locking block.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. This type of valve fitting with backflow prevention mechanism includes a valve body, a second bolt, a valve groove, a limit block, a spring, a fixing strip, a connecting plate, a plug-in block, a connecting column, a water outlet groove, a snap-fit ​​plate, and a second snap-fit ​​block. This structure effectively presses against the valve groove to prevent water backflow. The valve body has an internal connecting pipe that connects the inlet pipe to the water source, allowing water to flow into the pipe. When the water pump is turned on, the water flows into the delivery pipe, is filtered through filter cotton, and then flows into the connecting pipe. The water pressure generates the force of the water flow, which then presses against the limit block. The block moves backward, causing the limit block to separate from the valve groove. The spring drives the limit block to move backward, and the spring is compressed. When the water pump is turned off and the water flow stops, there is no water pressure entering the valve body from the connecting pipe. This eliminates the pressure on the spring, causing the limit block to come into contact with the inner wall of the valve groove. Furthermore, when the water in the outlet flows back, it generates reverse water pressure, pressing the limit block tightly against the valve groove. This achieves strong anti-backflow and anti-leakage performance and solves the problem of clean water and non-clean water mixing when the water pump is turned off and the water supply stops, which affects the use of the valve.

[0016] 2. This type of valve fitting with backflow prevention includes an inlet pipe, pump box, water pump, delivery pipe, filter cotton, first locking block, side block, first bolt, and connecting pipe. This structure allows for easy disassembly and assembly of the device. When the device is damaged and requires repair, the second bolt is rotated to remove it from the valve body, separating the connecting pipe from the valve body. The connecting column is then removed from the connecting plate and the inside of the valve body, separating the plug block from the valve body. Without the plug block's restriction, the fixing strip, along with the spring and limit block, can be removed, separating the valve body from its internal parts, completing the disassembly and repair work. This achieves easy disassembly and repair of the valve body, is simple to install, and has high performance. It solves the problem of valve bodies that cannot be disassembled and require pipe cutting for repair, and the overly complex setup that affects usability. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the water pump structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the filter cotton structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the outer structure of the valve body of this utility model;

[0021] Figure 5 This is a schematic diagram of the internal structure of the connecting pipe of this utility model;

[0022] Figure 6 This is a schematic diagram of the spring structure of this utility model;

[0023] Figure 7 This is a schematic diagram of the plug-in block structure of this utility model.

[0024] In the diagram: 1. Inlet pipe; 2. Pump box; 3. Water pump; 4. Delivery pipe; 5. Filter cotton; 6. First locking block; 7. Side block; 8. First bolt; 9. Connecting pipe; 10. Valve body; 11. Second bolt; 12. Valve groove; 13. Limiting block; 14. Spring; 15. Fixing strip; 16. Connecting plate; 17. Insertion block; 18. Connecting column; 19. Outlet groove; 20. Locking plate; 21. Second locking block. Detailed Implementation

[0025] 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.

[0026] Please see Figure 1-7A valve fitting for preventing backflow includes: an inlet pipe 1 and a valve body 10. A connecting pipe 9 is threaded into the inside of the valve body 10. A valve groove 12 is formed in the middle of the inner wall of the valve body 10. A limit block 13 is fitted to the inner wall of the valve groove 12. A spring 14 is fixedly connected to the bottom of the limit block 13. A fixing strip 15 is inserted into the bottom of the spring 14. Second bolts 11 are threaded into both sides of the valve body 10. A water outlet groove 19 is formed at one end of the valve body 10. The connecting pipe 9 is installed inside the valve body 10. The inlet pipe 1 is connected to a water source, allowing water to flow into the inlet pipe 1. A water pump 3 is then turned on to allow water to flow into a delivery pipe 4. Water is filtered by filter cotton 5 and flows into connecting pipe 9. The water pressure generates a force that pushes the limiting block 13 backward, causing it to separate from the valve groove 12. Spring 14 drives the limiting block 13 to move backward and is compressed. When water pump 3 is turned off, the water flow stops and no water flows into the valve body 10 from connecting pipe 9. Without the force of water pressure, spring 14 is not compressed, causing the limiting block 13 to abut against the inner wall of valve groove 12. When water flows back from outlet 19, it generates reverse water pressure, pressing the limiting block 13 against valve groove 12, thus achieving strong anti-backflow and anti-leakage performance.

[0027] The second bolt 11 passes through the valve body 10 and connects to the connecting pipe 9. The two sides of the fixing strip 15 are respectively snapped with plug blocks 17. The two sides of the valve body 10 are respectively provided with connecting plates 16. Two connecting posts 18 are inserted into the inside of the connecting plate 16. When the device is damaged and needs to be repaired, the second bolt 11 is rotated out of the valve body 10, so that the connecting pipe 9 is separated from the valve body 10. The connecting posts 18 are removed from the connecting plate 16 and the inside of the valve body 10, so that the plug blocks 17 are separated from the valve body 10. Without the restriction of the plug blocks 17, the fixing strip 15 can be removed along with the spring 14 and the limiting block 13, so that the valve body 10 is separated from the parts inside the valve body 10, completing the disassembly work and performing maintenance.

[0028] The connecting column 18 passes through the connecting plate 16 and is connected to the inside of the valve body 10. One end of the water inlet pipe 1 is fixedly connected to the pump box 2. The pump box 2 is equipped with a water pump 3. When the water pump 3 is turned on, water is transmitted to the valve body 10.

[0029] The pump box 2 is fixedly connected to the left side of the conveying pipe 4. A filter cotton 5 is inserted into the inner wall of one end of the conveying pipe 4. A snap-fit ​​plate 20 is fixedly connected to one side of the filter cotton 5. The water outlet end of the conveying pipe 4 is equipped with a filter cotton 5 to filter the water. The filter cotton 5 is fixedly connected to the snap-fit ​​plate 20. Several small holes can be set on the surface of the snap-fit ​​plate 20 to allow water to flow into the connecting pipe 9. During installation, the filter cotton 5 is inserted into the inside of the conveying pipe 4. The first snap-fit ​​blocks 6 on both sides of the snap-fit ​​plate 20 fit tightly against the inner wall of the conveying pipe 4, thereby fixing the filter cotton 5 to the conveying pipe 4. When the filter cotton 5 needs to be replaced, the snap-fit ​​plate 20 is pinched and pulled outward to remove the filter cotton 5 for replacement.

[0030] The first locking block 6 is fixedly connected to both sides of the locking plate 20. Two side blocks 7 are fixedly connected to the right side of the first locking block 6. During installation, the locking plate 20 is abutted against the connecting pipe 9 so that the first locking block 6 and the second locking block 21 fit together. Then, the first bolt 8 is threaded into the interior of the first locking block 6 and the second locking block 21 so that the conveying pipe 4 is connected to the valve body 10.

[0031] The connecting pipe 9 has a second locking block 21 fixedly connected to both sides, and the first locking block 6 and the second locking block 21 are connected by a first bolt 8 through their internal threads.

[0032] Working principle: When in use, connect the inlet pipe 1 to the water source to allow water to flow into the pipe 1. Turn on the water pump 3 to allow the water to flow into the delivery pipe 4. After the water is filtered by the filter cotton 5, it flows into the connecting pipe 9. The water pressure generates the force of the water flow, which pushes the limiting block 13 backward, causing the limiting block 13 to separate from the valve groove 12. The spring 14 drives the limiting block 13 to move backward and is compressed. When the water pump 3 is turned off, the water flow stops. When there is no water flowing into the valve body 10 from the connecting pipe 9, there is no water pressure, so the spring 14 is not compressed. This causes the limiting block 13 to abut against the inner wall of the valve groove 12. When the water in the outlet trough 19 flows back, it generates reverse water pressure, which presses the limiting block 13 against the valve groove 12 to prevent water backflow.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A valve fitting capable of preventing backflow, characterized in that, include: The valve body (10) is connected to the inlet pipe (1) and the valve body (10). The valve body (10) is internally threaded with a connecting pipe (9). A valve groove (12) is provided in the middle of the inner wall of the valve body (10). A limit block (13) is attached to the inner wall of the valve groove (12). A spring (14) is fixedly connected to the bottom of the limit block (13). A fixing strip (15) is inserted into the bottom of the spring (14). A second bolt (11) is threaded on both sides of the valve body (10). A water outlet groove (19) is provided at one end of the valve body (10).

2. The valve fitting for preventing backflow according to claim 1, characterized in that: The second bolt (11) passes through the valve body (10) and is connected to the connecting pipe (9). The two sides of the fixing strip (15) are respectively snapped with plug blocks (17). The two sides of the valve body (10) are respectively provided with connecting plates (16). Two connecting posts (18) are inserted into the inside of the connecting plate (16).

3. A valve fitting for preventing backflow as described in claim 2, characterized in that: The connecting column (18) passes through the connecting plate (16) and is connected to the inside of the valve body (10). One end of the water inlet pipe (1) is fixedly connected to the pump box (2), and a water pump (3) is installed inside the pump box (2).

4. A valve fitting for preventing backflow as described in claim 3, characterized in that: A conveying pipe (4) is fixedly connected to the left side of the pump box (2), and a filter cotton (5) is inserted into the inner wall of one end of the conveying pipe (4). A snap-fit ​​plate (20) is fixedly connected to one side of the filter cotton (5).

5. A valve fitting for preventing backflow as described in claim 4, characterized in that: The first locking block (6) is fixedly connected to both sides of the locking plate (20), and two side blocks (7) are fixedly connected to the right side of the first locking block (6).

6. A valve fitting for preventing backflow as described in claim 5, characterized in that: The two sides of the connecting pipe (9) are respectively fixedly connected to the second locking block (21), and the first locking block (6) and the second locking block (21) are connected by the internal thread of the first locking block (6) and the second locking block (21) by the first bolt (8).

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