Backflow prevention valve

Abstract

The utility model discloses an anti-backflow valve which comprises a first valve shell, a second valve shell and a connecting structure. The second valve shell is arranged at one end of the first valve shell, and the connecting structure is arranged between the first valve shell and the second valve shell. Compared with the prior art, the sealing structure has the advantages that the first mounting ring is rotated to drive the threaded ring to rotate in the threaded groove, so that the threaded ring is in threaded connection with the threaded groove until the side face of the first mounting ring is tightly attached to the two sealing rings, and therefore the sealing performance between the first mounting ring and the second mounting ring is guaranteed; and the first fixing seat, the fixing bolt, the second fixing seat and the fixing nut are matched for use, so that the first valve shell and the second valve shell are convenient to disassemble and assemble, water scale in the valve can be cleaned, the use cost is reduced, and use is convenient.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, specifically to an anti-backflow valve. Background Technology

[0002] Valves are pipeline accessories used to open and close pipelines, control flow direction, and regulate and control the parameters of the conveyed medium. According to their functions, they can be divided into shut-off valves, check valves, regulating valves, etc. Valves are control components in fluid conveying systems and have functions such as shut-off, regulation, flow guidance, backflow prevention, pressure stabilization, flow diversion, or overflow pressure relief. Anti-backflow valves are valves that can prevent liquid backflow and ensure that liquid flows through the valve in one direction.

[0003] Patent document CN219102119U discloses an anti-backflow valve, including a valve body. A water collection hood is fixedly connected to the left side of the valve body, and a flow guide hood is fixedly connected to the right side of the valve body. An installation component is fixedly connected to the top right side of the flow guide hood, and a rotating shaft is fixedly connected to the inner side of the installation component. A connecting component is rotatably connected to the rotating shaft, and torsion springs are sleeved on both the front and rear of the rotating shaft. An anti-backflow disc is fixedly connected to the end of the connecting component away from the rotating shaft, and the anti-backflow disc is attached to the right wall of the flow guide hood. A connecting seat is fixedly connected to the top of the valve body, and an installation plate is mounted on the top of the connecting seat. This utility model proposes an anti-backflow valve, facilitating better manual / automatic anti-backflow adjustment inside the valve body. When the anti-backflow disc cannot be used, a spare anti-backflow disc can be used. However, the existing technology still has shortcomings:

[0004] Existing anti-backflow valves are inconvenient to disassemble and clean during use. Scale buildup inside the valve due to prolonged use, coupled with the fact that the water collection cover and drainage cover are integral with the valve body, makes it impossible to clean the scale inside the valve. This increases the cost of use and affects the valve's performance.

[0005] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0006] The technical problem to be solved by this utility model is to overcome the above-mentioned defects and provide an anti-backflow valve.

[0007] To solve the above-mentioned technical problems, the technical solution provided by this utility model is: an anti-backflow valve, comprising:

[0008] Valve housing 1, wherein an installation ring 1 is fixedly connected to one end of the outer wall of valve housing 1;

[0009] Valve housing 2, which is located at one end of valve housing 1, and a mounting ring 2 is fixedly connected to one end of the outer wall of valve housing 2;

[0010] A connecting structure is provided between valve housing 1 and valve housing 2. The connecting structure includes a threaded groove at one end of mounting ring 2. A threaded ring is fixedly connected to one end of mounting ring 1, and the threaded ring is threaded into the threaded groove. Two sealing rings are fixedly connected to one end of mounting ring 2, and the sealing rings are located at both ends of the threaded groove. A fixing seat 1 is fixedly connected to the outer wall of mounting ring 1. There are multiple fixing seats 1 distributed circumferentially. A fixing bolt is threadedly connected to fixing seat 1. A fixing seat 2 is fixedly connected to the outer wall of mounting ring 2. One end of the fixing bolt passes through fixing seat 2 and the end is threadedly connected to a fixing nut.

[0011] Furthermore, the valve housing 1 is provided with an auxiliary structure inside. The auxiliary structure includes a semi-circular plate fixedly connected to the upper part of one end of the valve housing 1 near the valve housing 2. A water collecting cylinder is fixedly connected to the lower part of one end of the semi-circular plate. A guide plate is fixedly connected to the lower part of one end of the water collecting cover. A fixing seat is fixedly connected to the top of the outer wall of the mounting ring 1. A screw is threadedly connected inside the fixing seat. The bottom end of the screw extends into the interior of the valve housing 1 and has a spare anti-backflow plate at its end. The spare anti-backflow plate is pressed against the top opening of the water collecting cover. The top end of the screw extends to the top of the fixing seat and has a rotating disk fixedly connected to its end.

[0012] Furthermore, a drain pipe is fixedly connected to the other end of the valve body.

[0013] Furthermore, the drain pipe is provided with an anti-backflow structure, which includes a diversion plate fixedly connected to one end of the inner wall of the drain pipe. The diversion plate has a through hole. Limiting slide rods are fixedly connected to the four corners of the surface of the diversion plate away from the valve shell. Anti-backflow baffles are slidably connected to the limiting slide rods. The anti-backflow baffles are used in conjunction with the through hole. A spring is sleeved on the outside of the limiting slide rod. The spring is fixedly connected to the end of the anti-backflow baffle away from the through hole.

[0014] Furthermore, a water inlet pipe is fixedly connected to the other end of the valve housing.

[0015] The advantages of this utility model compared with the prior art are as follows: By setting the connection structure, the first mounting ring is moved to one end of the second mounting ring, and the threaded ring is moved into the threaded groove. Then, the first mounting ring is rotated to drive the threaded ring to rotate in the threaded groove, so that the threaded ring and the threaded groove are threadedly connected until the side of the first mounting ring is tightly fitted with the two sealing rings, thereby ensuring the sealing between the first mounting ring and the second mounting ring. With the use of the first fixing seat, the fixing bolt, the second fixing seat and the fixing nut, the first valve body and the second valve body are easy to disassemble and install, thereby enabling the scale inside the valve to be cleaned, reducing the cost of use, facilitating use, and improving the practicality of the valve. Attached Figure Description

[0016] Figure 1 This utility model relates to a three-dimensional anti-backflow valve. Figure 1 .

[0017] Figure 2 This utility model relates to a three-dimensional anti-backflow valve. Figure 2 .

[0018] Figure 3 This is a front view of an anti-backflow valve according to this utility model.

[0019] Figure 4 This is a front sectional view of an anti-backflow valve according to this utility model.

[0020] Figure 5 This utility model relates to an anti-backflow valve. Figure 4 Enlarged structural diagram at point A in the middle.

[0021] Figure 6 This utility model relates to an anti-backflow valve. Figure 4 Enlarged structural diagram at point B in the middle.

[0022] The diagram shows: 1. Valve housing one; 11. Mounting ring one; 2. Valve housing two; 21. Mounting ring two; 3. Connecting structure; 31. Threaded groove; 32. Threaded ring; 33. Sealing ring; 34. Fixing seat one; 35. Fixing bolt; 36. Fixing seat two; 37. Fixing nut; 4. Auxiliary structure; 41. Semicircular plate; 42. Water collection cylinder; 43. Guide plate; 44. Fixing seat; 45. Screw; 46. Anti-backflow plate; 47. Rotating plate; 5. Drain pipe; 6. Anti-backflow structure; 61. Drainage plate; 62. Through hole; 63. Limiting slide rod; 64. Anti-backflow baffle; 65. Spring; 7. Inlet pipe. Detailed Implementation

[0023] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses consistent with some aspects of this disclosure as detailed in the appended claims.

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0025] like Figures 1 to 6 As shown, this embodiment proposes an anti-backflow valve, including a valve body 1, an mounting ring 11 fixedly connected to one end of the outer wall of the valve body 1, a valve body 2 at one end of the valve body 1, an mounting ring 21 fixedly connected to one end of the outer wall of the valve body 2, a drain pipe 5 fixedly connected to the other end of the valve body 1, and a water inlet pipe 7 fixedly connected to the other end of the valve body 2. The thickness of the mounting ring 11 is greater than the thickness of the mounting ring 21.

[0026] A connecting structure 3 is provided between valve body 1 and valve body 2. The connecting structure 3 includes a threaded groove 31 opened at one end of mounting ring 21. A threaded ring 32 is fixedly connected to one end of mounting ring 11. The threaded ring 32 is threadedly connected to the threaded groove 31. Two sealing rings 33 are fixedly connected to one end of mounting ring 21. The sealing rings 33 are located at both ends of the threaded groove 31. The sealing rings 33 are located on the inner and outer sides of the threaded groove 31 to improve the sealing performance. By moving the threaded ring 32 into the threaded groove 31 and then rotating mounting ring 11, the threaded ring 32 is rotated in the threaded groove 31, so that the threaded ring 32 is threadedly connected to the threaded groove 31 until the side of mounting ring 11 is tightly fitted with the two sealing rings 33, thereby ensuring the sealing between mounting ring 11 and mounting ring 21. The sealing rings 33 can be made of rubber material, so that the sealing rings 33 have a certain degree of flexibility and can fit tightly with mounting ring 11.

[0027] Mounting ring 11 is fixedly connected to a mounting base 34 on its outer wall. There are multiple mounting bases 34 arranged in a circular pattern. Mounting base 34 is threaded with a fixing bolt 35. Mounting ring 21 is fixedly connected to a mounting base 36 on its outer wall. One end of the fixing bolt 35 passes through the mounting base 36 and the other end is threaded with a fixing nut 37. After the threaded ring 32 is connected to the threaded groove 31, the fixing bolt 35 is passed through the mounting base 34 and the mounting base 36, and the fixing nut 37 is tightened on one end of the fixing bolt 35. This provides auxiliary fixation between mounting ring 11 and mounting ring 21, making the installation connection between valve body 1 and valve body 2 more stable.

[0028] The valve housing 1 is equipped with an auxiliary structure 4. The auxiliary structure 4 includes a semi-circular plate 41 fixedly connected to the upper part of one end of the valve housing 1 near the valve housing 2. A water collecting cylinder 42 is fixedly connected to the lower part of one end of the semi-circular plate 41. The water collecting cylinder 42 has a water outlet. A guide plate 43 is fixedly connected to the lower part of one end of the water collecting cylinder 42. Water flows into the valve housing 1 through one end of the valve housing 2. At this time, the water enters the upper part of the semi-circular plate 41 and the guide plate 43 through the water outlet on the water collecting cylinder 42.

[0029] A fixed base 44 is fixedly connected to the top of the outer wall of the mounting ring 11. A screw 45 is threadedly connected inside the fixed base 44. The bottom end of the screw 45 extends into the interior of the valve body 1 and is equipped with a spare anti-backflow plate 46 at its end. The spare anti-backflow plate 46 is pressed against the top opening of the water collection cover 42. The top end of the screw 45 extends to the top of the fixed base 44 and is fixedly connected to a rotating disk 47 at its end. By rotating the rotating disk 47, the screw 45 and the spare anti-backflow plate 46 move downward. At this time, the spare anti-backflow plate 46 can seal the water outlet above the water collection cylinder 42, thus preventing backflow.

[0030] The drain pipe 5 is equipped with an anti-backflow structure 6. The anti-backflow structure 6 includes a diversion plate 61 fixedly connected to one end of the inner wall of the drain pipe 5. The diversion plate 61 has a through hole 62. Limiting slide rods 63 are fixedly connected to the four corners of the surface of the diversion plate 61 away from the valve body 1. Anti-backflow baffles 64 are slidably connected to the limiting slide rods 63. The anti-backflow baffles 64 are used in conjunction with the through hole 62. The size of the anti-backflow baffles 64 is larger than the size of the through hole 62, and the size of the anti-backflow baffles 64 is smaller than the size of the diversion plate 61. An anti-backflow baffle is sleeved on the outside of the limiting slide rods 63. A spring 65 is fixedly connected to the end of the anti-backflow baffle 64 away from the through hole 62. When water enters the drain pipe 5, the water pushes open the anti-backflow baffle 64 at one end of the diversion plate 61, causing the anti-backflow baffle 64 to move to one end under the limit slide rod 63 and squeeze the spring 65 to form a flow opening, so that water can be transported and drained through the drain pipe 5. When the drain pipe 5 is not transporting water, the anti-backflow baffle 64 automatically seals the through hole 62 of the diversion plate 61 under the elastic action of the spring 65, realizing the anti-backflow function.

[0031] In practical implementation, this utility model is used by first rotating the rotating disk 47, causing the screw 45 and the spare anti-backflow disk 46 to move upwards, thus separating from the water outlet above the water collecting cylinder 42. At this time, the spare anti-backflow disk 46 is kept in reserve. Then, water flows into the valve housing 1 through one end of the valve housing 2. At this time, the water enters the semi-circular plate 41 and the upper side of the guide plate 43 through the water outlet on the water collecting cylinder 42. Then, the water enters the drain pipe 5. At this time, the water pushes open the anti-backflow baffle 64 at one end of the guide plate 61, causing the anti-backflow baffle 64 to move to one end of the limiting slide rod 63 and squeeze the spring 65 to form a flow opening, so that the water can be transported and drained through the drain pipe 5. When backflow occurs, the water flows in reverse inside the drain pipe 5, squeezing the anti-backflow baffle 44. At the same time, the spring 45 drives the anti-backflow baffle. Plate 44 moves towards the diversion plate 61 on the limiting slide bar 43, so that the anti-backflow baffle 44 contacts the diversion plate 61 to achieve the anti-backflow function. When it is necessary to clean the scale inside the valve, rotate multiple fixing nuts 37 in sequence to remove the fixing bolts 35 from the fixing seat 1 34 and fixing seat 2 36. Then rotate the rotating mounting ring 11 to drive the threaded ring 32 to rotate in the threaded groove 31, so that the threaded ring 32 disengages from the threaded groove 31. Then the mounting ring 11 can be separated from the mounting ring 21, thus completing the separation of valve body 1 and valve body 2. This allows the operator to clean the scale inside valve body 1 and valve body 2, making the valve easy to disassemble and install. This makes it easier to clean the scale inside the valve, reducing the cost of use, making it convenient to use, and improving the practicality of the valve.

[0032] All content not described in detail in this specification is prior art known to those skilled in the art, and the accompanying drawings are structural schematic diagrams used to supplement the text of the specification.

[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 backflow prevention valve, characterized in that: include: Valve housing 1 (1), with an installation ring 1 (11) fixedly connected to one end of the outer wall of the valve housing 1 (1); Valve housing 2 (2) is located at one end of valve housing 1 (1), and an installation ring 2 (21) is fixedly connected to one end of the outer wall of valve housing 2 (2); A connecting structure (3) is provided between valve housing 1 (1) and valve housing 2 (2). The connecting structure (3) includes a threaded groove (31) opened at one end of mounting ring 2 (21). A threaded ring (32) is fixedly connected to one end of mounting ring 1 (11). The threaded ring (32) is threadedly connected to the threaded groove (31). Two sealing rings (33) are fixedly connected to one end of mounting ring 2 (21). The sealing rings (33) are provided at both ends of the threaded groove (31). A fixing seat 1 (34) is fixedly connected to the outer wall of mounting ring 1 (11). There are multiple fixing seats 1 (34) and they are distributed in a circumferential manner. A fixing bolt (35) is threadedly connected to the fixing seat 1 (34). A fixing seat 2 (36) is fixedly connected to the outer wall of mounting ring 2 (21). One end of the fixing bolt (35) passes through the fixing seat 2 (36) and the end is threadedly connected to a fixing nut (37).

2. The anti-backflow valve according to claim 1, characterized in that: The valve housing (1) is provided with an auxiliary structure (4). The auxiliary structure (4) includes a semi-circular plate (41) fixedly connected to the upper part of one end of the valve housing (2) inside the valve housing (1). A water collection cylinder (42) is fixedly connected to the lower part of one end of the semi-circular plate (41). A guide plate (43) is fixedly connected to the lower part of one end of the water collection cylinder (42). A fixing seat (44) is fixedly connected to the top of the outer wall of the mounting ring (11). A screw (45) is threadedly connected inside the fixing seat (44). The bottom end of the screw (45) extends into the valve housing (1) and the end is provided with a spare anti-backflow plate (46). The spare anti-backflow plate (46) is pressed against the top opening of the water collection cylinder (42). The top end of the screw (45) extends to the top of the fixing seat (44) and the end is fixedly connected with a rotating disk (47).

3. The anti-backflow valve according to claim 1, characterized in that: A drain pipe (5) is fixedly connected to the other end of the valve body (1).

4. The anti-backflow valve according to claim 3, characterized in that: The drain pipe (5) is provided with an anti-backflow structure (6). The anti-backflow structure (6) includes a diversion plate (61) fixedly connected to one end of the inner wall of the drain pipe (5). The diversion plate (61) has a through hole (62). The four corners of the surface of the diversion plate (61) away from the valve shell (1) are fixedly connected with limit slide rods (63). The limit slide rods (63) are slidably connected with anti-backflow baffles (64). The anti-backflow baffles (64) are used in conjunction with the through hole (62). A spring (65) is sleeved on the outside of the limit slide rods (63). The spring (65) is fixedly connected to the end of the anti-backflow baffles (64) away from the through hole (62).

5. The anti-backflow valve according to claim 1, characterized in that: The other end of the valve housing (2) is fixedly connected to a water inlet pipe (7).

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