Butterfly check valve structure

Abstract

This utility model provides a butterfly check valve structure, including a valve body, a vertical plate in the middle of the flow channel groove, knobs at the top and bottom of the vertical plate, a rotating rod connected to one end of each knob, racks meshing at the top and bottom of the drive gear, and a positioning clamping head connected to one end of each rack. A filter screen is provided on one side of the fan-shaped valve plate, which filters impurities inside the flow channel groove, preventing blockage. Openable positioning clamping heads are provided at the top and bottom of the vertical plate. During installation, the middle of the filter screen is first clamped in the limiting seat, then the knob is rotated, driving the drive gear to move the two racks. The positioning clamping head at the front end of the rack can then clamp onto the side of the filter screen, thus limiting its position. This makes maintenance and disassembly of the filter screen more convenient.

Description

Technical Field

[0001] This utility model belongs to the field of check valve technology and relates to a butterfly check valve structure. Background Technology

[0002] A butterfly check valve is a special type of check valve, named for its butterfly-like valve disc design. It is mainly used to prevent backflow of media in pipelines and features a compact structure, rapid opening and closing, and low pressure loss. The valve body is usually a short structure design and is connected to the pipeline flange. The butterfly valve disc is a circular disc fixed in the valve body by a rotating shaft and can rotate freely.

[0003] Traditional check valves have filters on the outside to trap impurities, but these filters are fixed inside the flow channel and cannot be removed or replaced, so improvements are needed. Summary of the Invention

[0004] The purpose of this invention is to provide a butterfly check valve structure to solve the problems mentioned in the background art.

[0005] The objective of this utility model can be achieved through the following technical solutions:

[0006] A butterfly check valve structure includes a valve body, an arc-shaped flow guide port, a filter screen, and a sector-shaped valve plate. The valve body has a flow channel groove inside, and a vertical plate is arranged in the middle of the flow channel groove. Two sector-shaped valve plates are movably mounted on the inner side of the vertical plate via a shaft. A filter screen is arranged on the outer side of the sector-shaped valve plates. A knob is arranged at the top and bottom of the vertical plate. One end of the knob is connected to a rotating rod, and one end of the rotating rod is connected to a drive gear. The top and bottom of the drive gear are meshed with racks. One end of the rack is connected to a positioning and clamping head, which is pressed against the side of the filter screen.

[0007] In the above-mentioned butterfly check valve structure, an arc-shaped flow guide port is provided on one side of the valve body, and the arc-shaped flow guide port is connected to the flow channel groove.

[0008] In the above-mentioned butterfly check valve structure, side slots are provided at the top and bottom of the vertical plate, and the positioning and clamping head is placed inside the side slots.

[0009] In the above-mentioned butterfly check valve structure, an inner baffle is provided on one side of the flow channel groove, and the sector valve plate is pressed against the outer side of the inner baffle.

[0010] In the above-mentioned butterfly check valve structure, a limiting seat is provided in the middle of the flow channel groove, and the middle of the sector valve plate is locked inside the limiting seat.

[0011] In the above-mentioned butterfly check valve structure, flanges are provided at both ends of the valve body, and multiple flange holes are provided on the outer side of the flanges.

[0012] Compared with the prior art, the advantages of the butterfly check valve structure of this utility model are as follows:

[0013] This application features two sector-shaped valve plates inside the valve body to control fluid flow. A filter screen is located on one side of each sector-shaped valve plate, filtering impurities from the flow channel and preventing blockage. Additionally, openable positioning clamping heads are located at the top and bottom of the vertical plate. During installation, the filter screen is first secured in the middle of the limiting seat. Then, rotating the knob moves the drive gear, which in turn moves two racks. The positioning clamping heads at the front of the racks then engage the side of the filter screen, thus limiting its position. This design facilitates easier maintenance and disassembly of the filter screen. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of a butterfly check valve according to this utility model.

[0015] Figure 2 This is a schematic diagram of the sector valve plate structure of a butterfly check valve according to this utility model.

[0016] Figure 3 This is a schematic diagram of the drive gear structure of a butterfly check valve according to this utility model.

[0017] In the diagram, 1. Valve body; 2. Arc-shaped flow guide; 3. Filter screen; 4. Inner baffle; 5. Limiting seat; 6. Flow channel groove; 7. Fan-shaped valve plate; 8. Flange; 9. Knob; 10. Vertical plate; 11. Rotating rod; 12. Drive gear; 13. Rack; 14. Positioning clamping head; 15. Side groove. Detailed Implementation

[0018] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0019] A butterfly check valve structure includes a valve body 1, an arc-shaped flow guide port 2, a filter screen plate 3, and a sector-shaped valve plate 7. The valve body 1 has a flow channel groove 6 inside, and a vertical plate 10 is arranged in the middle of the flow channel groove 6. Two sector-shaped valve plates 7 are movably installed on the inner side of the vertical plate 10 through a shaft. The filter screen plate 3 is arranged on the outer side of the sector-shaped valve plate 7. A knob 9 is arranged at the top and bottom of the vertical plate 10. One end of the knob 9 is connected to a rotating rod 11, and one end of the rotating rod 11 is connected to a drive gear 12. The top and bottom of the drive gear 12 are meshed with racks 13. One end of the rack 13 is connected to a positioning and clamping head 14, which is pressed against the side of the filter screen plate 3.

[0020] like Figure 1 , Figure 2 and Figure 3 As shown, this utility model discloses a butterfly check valve structure. Specifically, an arc-shaped flow guide port 2 is provided on one side of the valve body 1. The arc-shaped flow guide port 2 is connected to the flow channel groove 6. The arc-shaped flow guide port 2 is mainly used for guiding the liquid.

[0021] like Figure 1 , Figure 2 and Figure 3 As shown, this utility model discloses a butterfly check valve structure. Specifically, the top and bottom of the vertical plate 10 are provided with side slots 15, and the positioning and pressing head 14 is placed inside the side slots 15. When the positioning and pressing head 14 is not in use, it is retracted inside the side slots 15. When it is necessary to press the fan-shaped valve plate 7 with the positioning and pressing head 14, the knob 9 can be rotated. The rotation of the knob 9 will drive the positioning and pressing head 14 to extend out from the side slots 15, and then press the side of the filter screen plate 3 with the positioning and pressing head 14.

[0022] like Figure 1 , Figure 2 and Figure 3 As shown, this utility model discloses a butterfly check valve structure. Specifically, an inner baffle 4 is provided on one side of the flow channel groove 6, and a sector valve plate 7 is pressed against the outer side of the inner baffle 4. A rubber pad is provided on one side of the inner baffle 4, and the inner baffle 4 mainly supports the sector valve plate 7.

[0023] like Figure 1 , Figure 2 and Figure 3 As shown, this utility model discloses a butterfly check valve structure. Specifically, a limiting seat 5 is provided in the middle of the flow channel groove 6, and the middle of the sector valve plate 7 is locked inside the limiting seat 5. The limiting seat 5 mainly provides middle limiting support for the sector valve plate 7.

[0024] like Figure 1 , Figure 2 and Figure 3As shown, this utility model discloses a butterfly check valve structure. Specifically, both ends of the valve body 1 are provided with flanges 8, and multiple flange holes are provided on the outer side of the flanges 8. During installation, the valve body 1 of this application is fixed to the pipeline at both ends by the flanges 8.

[0025] This utility model discloses a butterfly check valve structure. Inside the valve body 1, two sector-shaped valve plates 7 control the flow opening. A filter screen 3 is located on one side of each sector-shaped valve plate 7, filtering impurities from the flow channel 6 and preventing blockage. The vertical plate 10 has openable positioning and clamping heads 14 at both the top and bottom. During installation, the filter screen 3 is first secured in the middle of the limiting seat 5. Then, the knob 9 is rotated, driving the drive gear 12 to move two racks 13. The positioning and clamping heads 14 at the front of the racks 13 then engage with the side of the filter screen 3, thus limiting its position. This structure facilitates maintenance and disassembly of the filter screen 3.

[0026] Contents not described in detail herein are existing technologies known to those skilled in the art. The specific embodiments described herein are merely illustrative examples illustrating the spirit of this invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this invention or exceeding the scope defined by the appended claims.

Claims

1. A butterfly check valve structure, comprising a valve body (1), an arc-shaped flow guide (2), a filter screen (3), and a sector-shaped valve plate (7), characterized in that, The valve body (1) has a flow channel groove (6) inside. A vertical plate (10) is provided in the middle of the flow channel groove (6). Two fan-shaped valve plates (7) are movably installed on the inner side of the vertical plate (10) through a shaft. A filter screen plate (3) is provided on the outer side of the fan-shaped valve plate (7). A knob (9) is provided at the top and bottom of the vertical plate (10). A rotating rod (11) is connected to one end of the knob (9). A drive gear (12) is connected to one end of the rotating rod (11). A rack (13) is meshed with the top and bottom of the drive gear (12). A positioning clamping head (14) is connected to one end of the rack (13). The positioning clamping head (14) is pressed against the side of the filter screen plate (3).

2. The butterfly check valve structure according to claim 1, characterized in that, An arc-shaped flow guide (2) is provided on one side of the valve body (1), and the arc-shaped flow guide (2) is connected to the flow channel (6).

3. The butterfly check valve structure according to claim 1, characterized in that, The top and bottom of the vertical plate (10) are provided with side slots (15), and the positioning and pressing head (14) is placed inside the side slots (15).

4. The butterfly check valve structure of claim 1, wherein An inner baffle (4) is provided on one side of the flow channel (6), and the fan-shaped valve plate (7) is pressed against the outside of the inner baffle (4).

5. The butterfly check valve structure of claim 1, wherein A limiting seat (5) is provided in the middle of the flow channel groove (6), and the middle of the sector valve plate (7) is locked inside the limiting seat (5).

6. The butterfly check valve structure of claim 1, wherein Both ends of the valve body (1) are provided with flanges (8), and multiple flange holes are provided on the outer side of the flanges (8).

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