High-performance anti-backflow and anti-blocking check valve
By incorporating anti-backflow and anti-clogging devices and a filter structure into the check valve, the problems of easy clogging and backflow in the check valve are solved, enabling smooth flow of the medium and simplifying cleaning.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-05
- Publication Date
- 2026-03-31
AI Technical Summary
The medium passage of existing check valves is prone to blockage and backflow, especially when the valve is closed, the medium tends to accumulate in the connection passage above the valve seat, leading to backflow.
An anti-backflow and anti-clogging device is installed on the valve body. The anti-backflow and anti-clogging device contains a check valve and a filter screen to prevent the medium from flowing back when the valve is opened. The filter screen is set at an angle to guide impurities to settle and avoid clogging.
It effectively prevents internal blockage and backflow of valves, ensures smooth flow of media, and simplifies the cleaning process.
Smart Images
Figure CN224064902U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a high -performance anti -backflow anti -block check valve. BACKGROUND
[0002] The medium channel in the prior art check valve is generally composed of an inlet channel, a connecting channel and an outlet channel, the connecting channel is vertically arranged, the inlet channel is arranged obliquely downward and is communicated with the lower end of the connecting channel, the outlet channel is arranged obliquely downward and is communicated with the upper end of the connecting channel, and the valve seat is arranged at the connection of the connecting channel and the outlet channel.
[0003] The medium channel of the check valve has many bending parts, especially the connection part of the inlet channel and the connecting channel is easy to accumulate impurities and cause blockage; when the valve is closed, the connecting channel above the valve seat is also easy to accumulate medium, and backflow phenomenon is easy to occur at the moment of opening the check valve. SUMMARY
[0004] The utility model aims at overcoming the insufficient of prior art, provide a kind of high -performance anti -backflow anti -block check valve, it is arranged on valve body anti -backflow anti -block device, anti -backflow anti -block device's upper body is arranged with check valve and filter screen, can effectively avoid the moment of opening valve generation backflow, also can prevent the blockage in valve.
[0005] The technical scheme of the utility model is: a kind of high -performance anti -backflow anti -block check valve, including valve body, the inlet channel, the connecting channel and the outlet channel are equipped in the valve body, the inlet channel is arranged obliquely downward and is communicated with the lower end of the connecting channel, the outlet channel is arranged obliquely downward and is communicated with the upper end of the connecting channel, the valve body is also equipped with a anti -backflow anti -block device on the bottom of the connecting channel;
[0006] The anti -backflow anti -block device includes cylindrical upper body, connecting part and barrel-shaped lower body;
[0007] The upper body is inserted into the connecting channel, the top of the upper body is spaced apart from the connection of the connecting channel and the outlet channel, and a first seal is provided between the outer periphery of the top of the upper body and the connecting channel.
[0008] A check valve is further provided at the top of the upper body, and a filter screen is further provided at the middle of the upper body.
[0009] One side of the upper body is provided with an inlet corresponding to the inlet channel.
[0010] The connecting part is fixed to the bottom of the valve body, a second seal is further provided at the connection between the connecting part and the valve body, and the upper body and the lower body are connected to the upper and lower ends of the connecting part respectively.
[0011] Specifically, the lower body is a transparent lower body, and the inlet is a large-diameter inlet.
[0012] Further, the check valve comprises a horizontal rod arranged at the top of the upper body and two valve plates connected to the two sides of the horizontal rod respectively, the two valve plates can be lifted upward respectively, and the upper end of the upper body and the two sides of the horizontal rod are respectively provided with limiting portions corresponding to the valve plates.
[0013] Further, the bottoms of the two valve plates are respectively provided with third seals corresponding to the limiting portions, the outer sides of the two valve plates are respectively provided with weight increasing portions, and the tops of the two valve plates are respectively provided with limiting columns.
[0014] Further, the bottom of the valve body is provided with a connecting port with an inner thread, and the connecting portion is screwed on the connecting port.
[0015] Further, the upper end of the upper body is further provided with a thickened portion corresponding to the check valve.
[0016] Specifically, the bottom of the opening is arranged close to the bottom of the connecting channel.
[0017] Further, the valve seat is arranged below the connecting channel and the liquid outlet channel, and the top of the upper body is kept apart from the valve seat.
[0018] Further, the valve core and the valve rod are further included, the valve core is arranged to be displaced up and down along the connecting channel, and the valve core is further arranged corresponding to the position of the valve seat.
[0019] Further, the two ends of the valve body are respectively provided with liquid inlet joints and liquid outlet joints.
[0020] The beneficial effects of the utility model are that the anti-backflow and anti-blocking device is arranged on the valve body, the check valve and the filter screen are arranged in the upper body of the anti-backflow and anti-blocking device, the check valve can effectively avoid backflow in the moment when the valve is opened, and the check valve can also prevent the valve from being blocked. BRIEF DESCRIPTION OF DRAWINGS
[0021] Figure 1 is the sectional view of the utility model;
[0022] Figure 2 is the structural schematic view of the check valve in the utility model.
[0023] In the drawing: valve body 1, liquid inlet channel 2, connecting channel 3, liquid outlet channel 4, upper body 5, connecting portion 6, lower body 7, first seal 8, check valve 9, filter screen 10, inlet 11, second seal 12, horizontal rod 13, valve plate 14, weight increasing portion 15, limiting column 16, thickened portion 17, valve seat 18, valve core 19, valve rod 20, liquid inlet joint 21, liquid outlet joint 22. DETAILED DESCRIPTION
[0024] The technical scheme of the utility model is further specifically explained below by examples in combination with drawings.
[0025] In combination Figure 1 And Figure 2 As shown in the figure, a high-performance anti-backflow and anti-blocking check valve comprises a valve body 1, an inlet channel 2, a connecting channel 3 and an outlet channel 4 are arranged in the valve body 1, the inlet channel 2 is arranged obliquely downward and is connected with the lower end of the connecting channel 3, the outlet channel 4 is arranged obliquely downward and is connected with the upper end of the connecting channel 3, and an anti-backflow and anti-blocking device is further arranged on the valve body 1 at the bottom of the connecting channel 3.
[0026] The anti-backflow and anti-blocking device comprises a cylindrical upper body 5, a connecting part 6 and a barrel-shaped lower body 7.
[0027] The upper body 5 is inserted into the connecting channel 3, a space is kept between the top of the upper body 5 and the connecting part of the connecting channel 3 and the outlet channel 4, and a first sealing 8 is arranged between the top of the upper body 5 and the connecting channel 3 to prevent the medium from passing through the gap between the upper body 5 and the connecting channel 3.
[0028] A backflow-preventing valve 9 is further arranged at the top of the upper body 5, and a filter screen 10 is further arranged obliquely downward in the middle of the upper body 5.
[0029] An inlet 11 corresponding to the inlet channel 2 is arranged on one side of the upper body 5.
[0030] The connecting part 6 is fixed at the bottom of the valve body 1, a second sealing 12 is further arranged at the connecting part of the connecting part 6 and the valve body 1, and the upper body 5 and the lower body 7 are respectively connected to the upper and lower ends of the connecting part 6, and the lower body 7 is a transparent lower body to facilitate the observation personnel to observe the accumulation degree of impurities in the lower body 7 and clean it in time.
[0031] The working principle and beneficial effects of the above structure are as follows: when the valve is opened, the medium enters the valve body 1 from the inlet channel 2, then enters the inside of the upper body 5 from the inlet 11 of the upper body 5, is filtered by the filter screen 10, and then enters the outlet channel 4 through the backflow-preventing valve 9 to be discharged; in this process, the impurities filtered by the filter screen 10 accumulate in the upper body 5, and due to the oblique downward arrangement of the filter screen 10, the impurities are guided to the lower body 7, and under the washing action of the medium, the impurities are not easy to adhere to the filter screen 10, so that the internal blocking of the valve body 1 can be effectively avoided; after the valve is closed, the impurities gradually deposit in the lower body 7, and the lower body 7 can be removed to clean the impurities when the pipeline is closed; when the valve is opened again, the medium temporarily accumulated at the upper end of the connecting channel 3 cannot produce backflow due to the action of the backflow-preventing valve 9, and until the new medium pushes open the backflow-preventing valve 9, the medium temporarily accumulated at the upper end of the connecting channel 3 is discharged together with the new medium through the outlet channel 4, so that the backflow of the medium temporarily accumulated at the upper end of the connecting channel 3 at the moment when the valve is opened can be effectively prevented.
[0032] In another embodiment, as shown in Figure 1 The inlet 11 is a large-diameter inlet to avoid excessive impact on the overall flow capacity of the valve.
[0033] In another embodiment, as shown in Figure 1 and Figure 2 The check valve 9 includes a crossbar 13 arranged at the top of the upper body 5, and two valve plates 14 connected to the two sides of the crossbar 13, respectively. The two valve plates 14 can be lifted upward, respectively. The upper end of the upper body 5 and the two sides of the crossbar 13 are also respectively provided with a limiting part corresponding to the valve plate 14. The check valve 9 has a simple structure and can avoid reverse flow phenomenon at the moment of opening.
[0034] In another embodiment, as shown in Figure 2 The bottom of the two valve plates 14 is respectively provided with a third seal corresponding to the limiting part. The outer side of the two valve plates 14 is also respectively provided with a weight-increasing part 15. The top of the two valve plates 14 is also respectively provided with a limiting column 16. After the valve plate 14 falls, the third seal and the limiting part abut to play a sealing role. Among them, the weight-increasing part 15 makes the valve plate 14 fall quickly, and the purpose of arranging the limiting column 16 is to limit the two valve plates 14 to each other, so as to avoid the two valve plates 14 from being lifted too much and falling under the action of gravity.
[0035] In another embodiment, as shown in Figure 1 The bottom of the valve body 1 is provided with a connecting port with internal threads, and the connecting part 6 is screwed on the connecting port.
[0036] In another embodiment, as shown in Figure 1 The upper end of the upper body 5 is also provided with a thickening part 17 corresponding to the check valve 9, so as to improve the reliability of the structure of the check valve 9.
[0037] In another embodiment, as shown in Figure 1 The bottom of the opening is arranged close to the bottom of the connecting channel 3 to avoid excessive accumulation of impurities at the joint between the upper body 5 and the connecting channel 3.
[0038] In another embodiment, as shown in Figure 1 It also includes a valve seat 18 arranged below the connection between the connecting channel 3 and the liquid outlet channel 4. The top of the upper body 5 and the valve seat 18 are kept apart to avoid affecting.
[0039] In another embodiment, as shown in Figure 1 It also includes a valve core 19 and a valve rod 20. The valve core 19 is arranged to move up and down along the connecting channel 3. The valve core 19 is also arranged corresponding to the position of the valve seat 18.
[0040] In another embodiment, as shown in Figure 1As shown, the valve body 1 is also respectively provided with a liquid inlet joint 21 and a liquid outlet joint 22 at two ends thereof.
Claims
1. A high-performance anti-reflux and anti-blocking check valve, comprising a valve body (1) with a liquid inlet channel (2), a connecting channel (3) and a liquid outlet channel (4) arranged therein, the liquid inlet channel (2) being arranged obliquely downward and connected with the lower end of the connecting channel (3), and the liquid outlet channel (4) being arranged obliquely downward and connected with the upper end of the connecting channel (3), characterized in that, The valve body (1) at the bottom of the connecting channel (3) is further provided with an anti-backflow and anti-blocking device. The anti-backflow and anti-blocking device comprises a cylindrical upper body (5), a connecting part (6) and a barrel-shaped lower body (7). The upper body (5) is inserted into the connecting channel (3), the top of the upper body (5) is spaced apart from the joint of the connecting channel (3) and the liquid outlet channel (4), and a first seal (8) is arranged between the outer periphery of the top of the upper body (5) and the connecting channel (3). A top anti-backflow valve (9) is further arranged in the upper body (5), and a filter screen (10) is further arranged in the middle of the upper body (5) and inclined downward. An inlet (11) corresponding to the liquid inlet channel (2) is arranged on one side of the upper body (5). The connecting part (6) is fixed at the bottom of the valve body (1), a second seal (12) is arranged at the joint of the connecting part (6) and the valve body (1), and the upper body (5) and the lower body (7) are respectively connected to the upper and lower ends of the connecting part (6).
2. A high-performance anti-backflow, anti-clogging check valve according to claim 1, characterized in that, The lower body (7) is a transparent lower body, and the inlet (11) is a large-diameter inlet.
3. A high-performance anti-reflux anti-clog check valve as defined in claim 2, wherein The top anti-backflow valve (9) comprises a horizontal rod (13) arranged at the top of the upper body (5) and two valve plates (14) respectively connected to the two sides of the horizontal rod (13), the two valve plates (14) can be respectively lifted upward, and a limiting part corresponding to the valve plate (14) is further arranged on the upper end of the upper body (5) and the two sides of the horizontal rod (13).
4. A high-performance anti-reflux anti-clog check valve as defined in claim 3, wherein The bottom of each of the two valve plates (14) is provided with a third seal corresponding to the limiting part, the outer side of each of the two valve plates (14) is further provided with a weight increasing part (15), and the top of each of the two valve plates (14) is further provided with a limiting column (16).
5. A high-performance anti-reflux anti-clog check valve as defined in claim 4, wherein The bottom of the valve body (1) is provided with a connecting port with internal threads, and the connecting part (6) is screwed on the connecting port.
6. A high-performance anti-reflux anti-clog check valve as defined in claim 5, wherein The upper end of the upper body (5) is further provided with a thickened part (17) corresponding to the top anti-backflow valve (9).
7. A high-performance anti-reflux, anti-clog check valve as defined in claim 6 wherein, The bottom of the opening is arranged close to the bottom of the connecting channel (3).
8. A high-performance anti-reflux anti-clog check valve as defined in claim 7, wherein Further comprising a valve seat (18), the valve seat (18) is arranged below the joint of the connecting channel (3) and the liquid outlet channel (4), and the top of the upper body (5) is spaced apart from the valve seat (18).
9. A high-performance anti-reflux, anti-clog check valve as defined in claim 8, wherein, Further comprising a valve core (19) and a valve rod (20), the valve core (19) is arranged to displace upward and downward along the connecting channel (3), and the valve core (19) is arranged to correspond to the position of the valve seat (18).
10. A high-performance anti-reflux, anti-clog check valve as defined in claim 9, wherein, The two ends of the valve body (1) are further respectively provided with a liquid inlet connector (21) and a liquid outlet connector (22).