Mud-proof butterfly valve

Abstract

The utility model relates to butterfly valve technical field discloses a kind of silt-preventing type butterfly valves, including valve body, the right end top side of valve body is provided with connecting block, the inner wall of connecting block is fixedly connected with fixed ring, the inner wall of fixed ring is fixedly connected with filter screen, the left and right sides of fixed ring are all provided with sealing groove, the outside of sealing groove is all provided with sealing assembly, the inner wall left end of valve body is all fixedly connected with slide bar, the outer wall of slide bar is slidably connected with moving block, the opposite end of moving block is provided with anti-reflux component. In the utility model, the moving ring of fixed ring fixed after two sides will be under the elastic force of first spring, sealing ring is extruded in sealing groove, so that the sealing property of connecting place is guaranteed after filter screen installation is completed, and when water current flows from the left end of valve body to right end, second spring will extrude baffle in ring body left end by moving block, water current is blocked, water current cannot pass, can prevent a series of problems caused by water current backflow.

Description

Technical Field

[0001] This utility model relates to the field of butterfly valve technology, and in particular to a mud and sand resistant butterfly valve. Background Technology

[0002] Butterfly valves are a commonly used type of valve in various fluid transport systems, with advantages such as simple structure, convenient operation, and low flow resistance. However, in some specific application scenarios, such as water conservancy projects, sewage treatment, mine drainage, and seawater desalination, the fluids often contain a large number of solid particles such as silt and impurities. These solid particles can seriously affect the wear resistance and service life of butterfly valves.

[0003] Currently, to prevent sediment from affecting butterfly valves, a filter screen is usually installed inside the butterfly valve to filter out sediment. The filter screen usually needs to be removable from the valve body for cleaning to prevent sediment from clogging it. This can lead to poor sealing at the connection between the filter screen and the valve body, potentially causing water leakage.

[0004] In response to this technical problem of poor sealing at the connection between the valve body and the filter screen, this application proposes a mud and sand resistant butterfly valve. Utility Model Content

[0005] The purpose of this utility model is to solve the problem of poor sealing at the connection between the valve body and the filter screen. It proposes a mud-proof butterfly valve. After the fixed ring is fixed, the moving rings on both sides will press the sealing ring into the sealing groove under the elastic force of the first spring, so as to ensure the sealing of the connection after the filter screen is installed. When the water flows from the left end to the right end of the valve body, the second spring will press the baffle on the left end of the ring body through the moving block, blocking the water flow and preventing the water flow from passing through, which can prevent a series of problems caused by water backflow.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a mud-proof butterfly valve, comprising a valve body, a connecting block provided on the top right side of the valve body, a fixing ring fixedly connected to the inner wall of the connecting block, a filter screen fixedly connected to the inner wall of the fixing ring, sealing grooves provided on both the left and right sides of the fixing ring, sealing components provided on the outer sides of the sealing grooves, a sliding rod fixedly connected to both the front and rear sides of the left end of the valve body inner wall, a moving block slidably connected to the outer wall of the sliding rod, and an anti-backflow component provided at one end of the moving block.

[0007] Furthermore, the sealing assembly includes two movable rings slidably connected to the inner wall of the valve body. The movable rings are located on the left and right sides of the fixed ring, respectively. A sealing ring is fixedly connected to one end of each movable ring, and the sealing ring is located on the inner wall of the sealing groove.

[0008] Furthermore, multiple first springs are fixedly connected to the opposite ends of the moving rings on both the left and right sides, and the opposite ends of the first springs are fixedly connected to the inner wall of the valve body.

[0009] Furthermore, the anti-backflow assembly includes a baffle fixedly connected to one end of the movable block, an annular body fixedly connected to the inner wall of the left end of the valve body, and the right end of the baffle close to the left end of the annular body.

[0010] Furthermore, the outer wall of the baffle is larger than the inner wall of the ring, and the outer wall of the baffle is smaller than the inner wall of the valve body.

[0011] Furthermore, each slide bar is fitted with a second spring, the left end of which is fixedly connected to the inner wall of the valve body, and the right end of which is fixedly connected to the left end of the moving block.

[0012] Furthermore, a second fixing block is fixedly connected to both the front and rear sides of the valve body, and a first fixing block is fixedly connected to both the front and rear ends of the connecting block. The first fixing block and the second fixing block are connected by bolts.

[0013] This utility model has the following beneficial effects:

[0014] 1. In this utility model, by fixing the fixing ring inside the valve body, the filter screen is installed inside the valve body to filter mud and sand. After the fixing ring is fixed, the moving rings on both sides will press the sealing ring into the sealing groove under the elastic force of the first spring, so as to ensure the sealing of the connection after the filter screen is installed.

[0015] 2. In this utility model, a baffle is placed at the left end of the ring body. When water flows from the right end of the valve body to the left end, it can pass through normally. However, when water flows from the left end of the valve body to the right end, the second spring will press the baffle at the left end of the ring body through the moving block, blocking the water flow and preventing the water flow from passing through. This can prevent a series of problems caused by water backflow. Attached Figure Description

[0016] Figure 1 This is a perspective view of a mud-proof butterfly valve proposed in this utility model;

[0017] Figure 2 This is a cross-sectional view of the valve body of a mud-proof butterfly valve proposed in this utility model.

[0018] Figure 3 This is an exploded view of the fixed ring and the moving ring of a mud-proof butterfly valve proposed in this utility model.

[0019] Figure 4 This is a schematic diagram of the ring body of a mud-proof butterfly valve proposed in this utility model.

[0020] Legend:

[0021] 1. Valve body; 2. Connecting block; 3. Fixing ring; 4. Sealing groove; 5. Filter screen; 6. Moving ring; 7. Sealing ring; 8. First spring; 9. First fixing block; 10. Second fixing block; 11. Ring body; 12. Slide rod; 13. Moving block; 14. Second spring; 15. Baffle. Detailed Implementation

[0022] 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.

[0023] Reference Figures 1-3 An embodiment of this utility model provides a mud and sand prevention butterfly valve, comprising a valve body 1, a connecting block 2 provided on the top right side of the valve body 1, a fixing ring 3 fixedly connected to the inner wall of the connecting block 2, a filter screen 5 fixedly connected to the inner wall of the fixing ring 3, sealing grooves 4 opened on both the left and right sides of the fixing ring 3, two movable rings 6 slidably connected to the inner wall of the valve body 1, the movable rings 6 being located on the left and right sides of the fixing ring 3 respectively, a sealing ring 7 fixedly connected to the opposite end of each movable ring 6, the sealing ring 7 being located on the inner wall of the sealing groove 4, a plurality of first springs 8 fixedly connected to the opposite ends of each of the left and right movable rings 6, the opposite ends of each of the first springs 8 being fixedly connected to the inner wall of the valve body 1, second fixing blocks 10 fixedly connected to both the front and rear sides of the valve body 1, first fixing blocks 9 fixedly connected to both the front and rear ends of the connecting block 2, the first fixing blocks 9 and the second fixing blocks 10 being connected by bolts.

[0024] Specifically, a handle is provided on the top of the valve body 1. The handle is connected to the valve via a rotating shaft. The valve controls the opening and closing of the inner wall of the valve body 1, which is existing technology and will not be described in detail. When the filter screen 5 is removed, the first spring 8 presses the sealing ring 7 on the moving ring 6 into the sealing groove 4. Therefore, a large force is required to move the connecting block 2 outward. The connecting block 2 has holes to facilitate its movement. When installing the filter screen 5, a tool similar to tweezers is needed to separate the moving rings 6 on both sides and then insert the fixing ring 3.

[0025] Reference Figure 2 and Figure 3A slide rod 12 is fixedly connected to both the front and rear sides of the left end of the inner wall of the valve body 1. A moving block 13 is slidably connected to the outer wall of the slide rod 12. A baffle 15 is fixedly connected to one end of the moving block 13. A ring body 11 is fixedly connected to the inner wall of the left end of the valve body 1. The right end of the baffle 15 is close to the left end of the ring body 11. The outer wall of the baffle 15 is larger than the inner wall of the ring body 11 and smaller than the inner wall of the valve body 1. A second spring 14 is sleeved on the outside of the slide rod 12. The left end of the second spring 14 is fixedly connected to the inner wall of the valve body 1, and the right end of the second spring 14 is fixedly connected to the left end of the moving block 13.

[0026] Specifically, movable grooves are provided on both the front and rear sides of the inner wall of the valve body 1. The second spring 14 and the slide rod 12 are located in the movable grooves. At the same time, the moving block 13 slides in the movable grooves. The right end of the ring body 11 is a conical opening, which makes it easier for water to flow from the right end of the ring body 11 to the left end of the ring body 11.

[0027] Working principle: During use, turning the handle on valve body 1 opens the valve inside valve body 1, allowing water to flow from the right end to the left end. At this time, the filter screen 5 installed on the right end of valve body 1 filters the water, removing sediment. When the water enters ring body 11, the water pressure exceeds the elastic force of the second spring 14, causing the baffle 15 to move to the left. The baffle 15 then compresses the second spring 14 via the moving block 13, opening the gap between the baffle 15 and ring body 11, allowing normal water flow. When the water flows back from the left end to the right end, the second spring 14, via the moving block 13, causes the baffle 15 to move closer to ring body 11. Simultaneously, the water pressure on the left end of the baffle 15 strengthens the connection between the baffle 15 and ring body 11. The fit between the two rings prevents water from flowing through the ring 11, thus preventing backflow. After long-term filtration, sediment will accumulate on the filter screen 5, causing it to become clogged. At this time, the bolts on the first fixing block 9 and the second fixing block 10 can be removed with a tool, and then the connecting block 2 can be pulled outward to move the fixing ring 3 and the filter screen 5 out of the valve body 1. Then the filter screen 5 can be cleaned. After cleaning, the fixing ring 3 can be put back into the valve body 1. The first springs 8 on both sides will press the moving ring 6 against the fixing ring 3, so that the sealing ring 7 on the moving ring 6 is pressed into the sealing groove 4 on the fixing ring 3, ensuring the sealing of the fixing ring 3 in the valve body 1. Finally, the first fixing block 9 and the second fixing block 10 are fixed together with bolts.

[0028] 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 mud-proof butterfly valve, characterized in that, The valve body (1) includes a connecting block (2) on the top right side of the valve body (1). A fixing ring (3) is fixedly connected to the inner wall of the connecting block (2). A filter screen (5) is fixedly connected to the inner wall of the fixing ring (3). Sealing grooves (4) are provided on both the left and right sides of the fixing ring (3). Sealing components are provided on the outer side of the sealing grooves (4). A slide rod (12) is fixedly connected to both the front and rear sides of the left end of the inner wall of the valve body (1). A moving block (13) is slidably connected to the outer wall of the slide rod (12). An anti-backflow component is provided at one end of the moving block (13).

2. The anti-sand butterfly valve according to claim 1, characterized in that: The sealing assembly includes two movable rings (6) slidably connected to the inner wall of the valve body (1). The movable rings (6) are located on the left and right sides of the fixed ring (3), respectively. A sealing ring (7) is fixedly connected to one end of each movable ring (6), and the sealing ring (7) is located on the inner wall of the sealing groove (4).

3. The anti-sand butterfly valve according to claim 2, characterized in that: Multiple first springs (8) are fixedly connected to the opposite ends of the moving rings (6) on both the left and right sides, and the opposite ends of the first springs (8) are fixedly connected to the inner wall of the valve body (1).

4. A mud-proof butterfly valve according to claim 1, characterized in that: The anti-backflow assembly includes a baffle (15) fixedly connected to one end of the movable block (13), and an annular body (11) fixedly connected to the inner wall of the left end of the valve body (1). The right end of the baffle (15) is close to the left end of the annular body (11).

5. A mud-proof butterfly valve according to claim 4, characterized in that: The outer wall of the baffle (15) is larger than the inner wall of the ring (11), and the outer wall of the baffle (15) is smaller than the inner wall of the valve body (1).

6. A mud-proof butterfly valve according to claim 4, characterized in that: Each slide rod (12) is covered with a second spring (14). The left end of the second spring (14) is fixedly connected to the inner wall of the valve body (1), and the right end of the second spring (14) is fixedly connected to the left end of the moving block (13).

7. A mud-proof butterfly valve according to claim 1, characterized in that: The valve body (1) is fixedly connected to the front and rear sides with a second fixing block (10), and the connecting block (2) is fixedly connected to the front and rear ends with a first fixing block (9). The first fixing block (9) and the second fixing block (10) are connected by bolts.

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