Micro-resistance slow-closing butterfly check valve
By introducing regulating and noise reduction devices into the check valve, the problem of sludge and debris clogging is solved, fluid backflow is reduced and noise is lowered, thus improving the practicality and lifespan of the check valve.
Patent Information
- Application Number
- CN202520596368.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-01
- Publication Date
- 2026-02-10
- Estimated Expiration
- 2035-04-01
AI Technical Summary
Existing check valves are prone to jamming during use due to debris such as sludge entering the spring gaps, rendering them unusable.
A micro-resistance slow-closing butterfly check valve was designed, which includes an adjustment device and a noise reduction device. The cylinder drives the pull block, pull bar and adjustment bar to rotate the baffle to block the leakage plate and prevent fluid backflow. The combination of rubber cylinder and positioning ring reduces noise.
It effectively avoids the influence of debris on the check valve, reduces fluid backflow, improves the practicality and service life of the check valve, and at the same time reduces noise during water flow, thus protecting the environment.
Smart Images
Figure CN223895086U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of check valve technology, and in particular to a low-resistance slow-closing butterfly check valve. Background Technology
[0002] The low-resistance, slow-closing butterfly check valve is a type of valve used in drainage pipelines carrying media such as clean water, sewage, and seawater. It prevents backflow and effectively limits destructive water hammer, ensuring pipeline safety. The low-resistance, slow-closing butterfly check valve mainly consists of a valve body, two semi-circular valve discs, a return spring, an oil reservoir, a slow-closing small cylinder assembly, and a needle valve. Its working principle relies on the thrust of the inlet medium to smoothly push open the two valve discs. Simultaneously, the inlet pressure medium enters the lower part of the piston in the oil cylinder, pushing the piston and forcing the oil above the piston through the needle valve into the tail ends of the small cylinders on both sides of the valve body, causing the piston rod in the small cylinders to extend. When the inlet medium pressure drops below the outlet pressure, the medium will backflow. At this time, the valve discs will automatically close under the action of the spring and the backflow of the medium. However, because the piston rod is in the extended position, it does not completely close the valve discs, leaving about 20% of the area for the medium to pass through, thus eliminating water hammer. The valve disc is divided into two steps by the piston: first a rapid closure and then a slow closure. This achieves both preventing the motor from reversing and eliminating noise. With the development of society, check valves are used when water flows backward.
[0003] Existing equipment, such as CN207609819U, is a low-resistance, slow-closing butterfly check valve. It primarily achieves the low-resistance, slow-closing effect by replacing a retaining spring with a pneumatic rod. Compared to a retaining spring, the pneumatic rod avoids elastic loss and fatigue caused by repeated bending, which can affect the normal operation of the low-resistance, slow-closing check valve. The pneumatic rod also boasts a long service life and high reliability. It not only blocks the strong thrust of the medium entering the valve body, allowing the valve plate to be smoothly pushed open by the medium, but also assists the slow-closing cylinder assembly in preventing the strong thrust generated by the medium's backflow. Because the pneumatic rod is compressed and forced to rebound under external force, the inert gas inside the rod provides a damping effect during the rebound process, preventing it from quickly returning to its original shape like a retaining spring. Therefore, replacing the retaining spring with a pneumatic rod extends the service life of the low-resistance, slow-closing butterfly check valve and improves its working efficiency.
[0004] When water needs to be discharged, a check valve is used to control the flow of water inside the pipeline so that the fluid will not flow backward during the process. However, during use, existing check valves may get stuck because sludge and other debris enter the gaps of the spring, causing the check valve to malfunction. Utility Model Content
[0005] The purpose of this invention is to address the shortcomings of existing check valves that cannot be used properly, and to propose a low-resistance slow-closing butterfly check valve.
[0006] To achieve the above objectives, this utility model adopts the following technical solution: a low-resistance, slow-closing butterfly check valve, comprising a water pipe, a flange, and an adjusting device. The flange is installed on the surfaces of both ends of the water pipe, and the adjusting device is disposed on the surface of the water pipe. The adjusting device includes a drain pan, which is fixedly connected to the surface of the water pipe. A baffle is rotatably connected to the surface of the drain pan, and a rotating disk is fixedly connected to the surface of the baffle. A cylinder is fixedly connected to the surface of the water pipe, and a pull block is fixedly connected to the drive end of the cylinder. A pull bar is rotatably connected to the surface of the pull block, and an adjusting bar is rotatably connected to the surface of the pull bar. The adjusting bar is rotatably connected to the surface of the rotating disk. A water inlet is provided on the surface of the baffle, and the water inlet is aligned with the water inlet on the surface of the drain pan. The water inlet can cooperate with the baffle to guide the water flow.
[0007] Preferably, a water-proof sleeve is fixedly connected to the inner surface of the water pipe, and the water-proof sleeve contacts the surface of the pull block. The water-proof sleeve can cooperate with the water pipe to block the water from flowing out.
[0008] Preferably, the surface of the water pipe is provided with a noise reduction device, the noise reduction device including a positioning ring, the positioning ring being fixedly connected to the surface of one end of the water pipe, and a movable ring being placed on the surface of the other end of the water pipe, the movable ring being the same size as the positioning ring, the positioning ring being able to cooperate with the water pipe and the movable ring to achieve the purpose of limiting the rubber cylinder.
[0009] Preferably, a rubber cylinder is placed on the surface of the movable ring, the rubber cylinder is inserted into the surface of the water pipe, the rubber cylinder is inserted into the surface of the positioning ring, and the movable ring is sleeved on the surface of the rubber cylinder. The rubber cylinder can cooperate with the movable ring to achieve the purpose of restricting the rubber cylinder.
[0010] Preferably, a pressure plate is placed on the surface of the movable ring, and a threaded rod is threadedly connected to the inner surface of the pressure plate. The threaded rod is inserted into the surface of the movable ring and threadedly connected to the inner surface of the water pipe. A base is fixedly connected to the surface of the threaded rod, and the base is placed on the surface of the pressure plate. The pressure plate can cooperate with the movable ring, the threaded rod, and the base to achieve the purpose of restricting the movable ring.
[0011] Compared with the prior art, the advantages and positive effects of this utility model are as follows:
[0012] 1. In this utility model, by setting an adjustment device, the impact of sludge and other debris on the check valve is reduced when the check valve is in use. When the equipment is in use, the equipment reduces backflow by blocking fluid backflow. The cylinder is activated, which pulls the pull block, which drives the pull bar, which drives the adjustment bar, which drives the rotating disc, which drives the baffle to rotate. When the baffle rotates to a specified angle, the baffle blocks the leakage plate. By setting the adjustment device, the impact of sludge and other debris on the check valve is effectively reduced. When the check valve is in use, the adjustment device is activated to prevent debris from affecting the normal adjustment of the check valve, thereby improving the practicality of the check valve, enhancing the auxiliary function of the adjustment device for the check valve, and extending the service life of the check valve. Attached Figure Description
[0013] Figure 1 A three-dimensional structural diagram of a low-resistance slow-closing butterfly check valve is provided for this utility model.
[0014] Figure 2 A schematic diagram of the regulating device structure of a low-resistance slow-closing butterfly check valve is provided for this utility model.
[0015] Figure 3 This invention proposes a low-resistance, slow-closing butterfly check valve. Figure 2 Schematic diagram of the structure at point A in the middle;
[0016] Figure 4 A schematic diagram of a noise reduction device for a low-resistance, slow-closing butterfly check valve is provided for this utility model.
[0017] Figure 5 This invention proposes a low-resistance, slow-closing butterfly check valve. Figure 4 Schematic diagram of the structure at point B.
[0018] Legend:
[0019] 1. Water pipe; 2. Flange; 3. Adjusting device; 31. Cylinder; 32. Rotating disc; 33. Adjusting bar; 34. Pull bar; 35. Baffle; 36. Pull block; 37. Leakage tray; 38. Waterproof sleeve; 39. Water inlet; 4. Noise reduction device; 41. Rubber cylinder; 42. Moving ring; 43. Positioning ring; 44. Pressure plate; 45. Threaded rod; 46. Chassis. Detailed Implementation
[0020] Please see Figure 1-5 This utility model provides a technical solution: a low-resistance slow-closing butterfly check valve, including a water pipe 1, a flange 2 and an adjusting device 3. The flange 2 is installed on the surfaces of both ends of the water pipe 1, and the adjusting device 3 is set on the surface of the water pipe 1.
[0021] The specific settings and functions of the adjustment device 3 and the noise reduction device 4 will be explained in detail below.
[0022] In this embodiment: the adjusting device 3 includes a water leakage plate 37, which is fixedly connected to the surface of the water pipe 1. A baffle 35 is rotatably connected to the surface of the water leakage plate 37. A rotating disk 32 is fixedly connected to the surface of the baffle 35. A cylinder 31 is fixedly connected to the surface of the water pipe 1. A pull block 36 is fixedly connected to the drive end of the cylinder 31. A pull bar 34 is rotatably connected to the surface of the pull block 36. An adjusting bar 33 is rotatably connected to the surface of the pull bar 34. The adjusting bar 33 is rotatably connected to the surface of the rotating disk 32.
[0023] Specifically, the surface of the baffle 35 is provided with a water inlet 39, which is aligned with the water outlet on the surface of the drain plate 37. The water inlet 39 can cooperate with the baffle 35 to guide the flow of water.
[0024] Specifically, a water-proof sleeve 38 is fixedly connected to the inner surface of the water pipe 1, and the water-proof sleeve 38 is in contact with the surface of the pull block 36.
[0025] In this embodiment, the water-proof sleeve 38 can be used in conjunction with the water pipe 1 to block the water flow.
[0026] In this embodiment: a noise reduction device 4 is provided on the surface of the water pipe 1. The noise reduction device 4 includes a positioning ring 43, which is fixedly connected to the surface of one end of the water pipe 1. A movable ring 42 is placed on the surface of the other end of the water pipe 1. The movable ring 42 is the same size as the positioning ring 43. The positioning ring 43 can cooperate with the water pipe 1 and the movable ring 42 to achieve the purpose of restricting the rubber cylinder 41.
[0027] Specifically, a rubber cylinder 41 is placed on the surface of the movable ring 42, the rubber cylinder 41 is inserted into the surface of the water pipe 1, the rubber cylinder 41 is inserted into the surface of the positioning ring 43, and the movable ring 42 is sleeved on the surface of the rubber cylinder 41.
[0028] In this embodiment, the rubber cylinder 41 can cooperate with the movable ring 42 to achieve the purpose of restricting the rubber cylinder 41.
[0029] Specifically, a pressure plate 44 is placed on the surface of the movable ring 42, and a threaded rod 45 is threadedly connected to the inner surface of the pressure plate 44. The threaded rod 45 is inserted into the surface of the movable ring 42 and threadedly connected to the inner surface of the water pipe 1. A base plate 46 is fixedly connected to the surface of the threaded rod 45 and is placed on the surface of the pressure plate 44.
[0030] In this embodiment, the pressure plate 44 can cooperate with the movable ring 42, the threaded rod 45, and the base plate 46 to achieve the purpose of restricting the movable ring 42.
[0031] Working Principle: By setting up the regulating device 3, the impact of sludge and other debris on the check valve is reduced when the check valve is in use. When the equipment is in use, it reduces backflow by blocking fluid flow. The cylinder 31 is activated, pulling the pull block 36, which in turn drives the pull bar 34. The pull bar 34 drives the regulating bar 33, which in turn drives the rotating disc 32. The rotating disc 32 then drives the baffle 35 to rotate. When the baffle 35 rotates to a specified angle, it blocks the leak plate 37. By setting up the regulating device 3, the impact of sludge and other debris on the check valve is effectively reduced. When the check valve is in use, activating the regulating device 3 prevents debris from affecting the normal adjustment of the check valve, improving its practicality, enhancing the auxiliary function of the regulating device 3, and extending the service life of the check valve. Furthermore, by setting... The noise reduction device 4 reduces the noise generated during water flow. When the equipment is in use, it reduces backflow by preventing fluid backflow. A rubber cylinder 41 is placed in the water pipe 1, with one end inserted into the positioning ring 43. A movable ring 42 is fitted onto the rubber cylinder 41, and a pressure plate 44 is placed on the movable ring 42. The threaded rod 45 is rotated, inserting into the water pipe 1 and connecting threadedly. The threaded rod 45 drives the base plate 46, which presses down on the pressure plate 44. By setting up the noise reduction device 4, the noise generated during water flow is effectively reduced. When the water flows, the noise reduction device 4 is activated, preventing noise from impacting the environment, improving the practicality of the check valve, enhancing the auxiliary function of the noise reduction device 4 for the check valve, and improving the environmental protection of the check valve.
Claims
1. A low-resistance, slow-closing butterfly check valve, comprising a water pipe (1), a flange (2), and a regulating device (3), characterized in that: The flange (2) is installed on the surfaces of both ends of the water pipe (1). The adjusting device (3) is set on the surface of the water pipe (1). The adjusting device (3) includes a drain pan (37). The drain pan (37) is fixedly connected to the surface of the water pipe (1). A baffle (35) is rotatably connected to the surface of the drain pan (37). A rotating disk (32) is fixedly connected to the surface of the baffle (35). A cylinder (31) is fixedly connected to the surface of the water pipe (1). A pull block (36) is fixedly connected to the driving end of the cylinder (31). A pull strip (34) is rotatably connected to the surface of the pull block (36). An adjusting strip (33) is rotatably connected to the surface of the pull strip (34). The adjusting strip (33) is rotatably connected to the surface of the rotating disk (32).
2. The low-resistance slow-closing butterfly check valve according to claim 1, characterized in that: The surface of the baffle (35) is provided with a water inlet (39), which is aligned with the water inlet on the surface of the drain plate (37).
3. The low-resistance slow-closing butterfly check valve according to claim 1, characterized in that: A water-proof sleeve (38) is fixedly connected to the inner surface of the water pipe (1), and the water-proof sleeve (38) is in contact with the surface of the pull block (36).
4. A low-resistance, slow-closing butterfly check valve according to claim 3, characterized in that: The surface of the water pipe (1) is provided with a noise reduction device (4), the noise reduction device (4) includes a positioning ring (43), the positioning ring (43) is fixedly connected to the surface of one end of the water pipe (1), and a movable ring (42) is placed on the surface of the other end of the water pipe (1), the movable ring (42) and the positioning ring (43) are the same size.
5. A low-resistance, slow-closing butterfly check valve according to claim 4, characterized in that: A rubber cylinder (41) is placed on the surface of the movable ring (42). The rubber cylinder (41) is inserted into the surface of the water pipe (1). The rubber cylinder (41) is inserted into the surface of the positioning ring (43). The movable ring (42) is sleeved on the surface of the rubber cylinder (41).
6. A low-resistance slow-closing butterfly check valve according to claim 5, characterized in that: A pressure plate (44) is placed on the surface of the movable ring (42). A threaded rod (45) is threadedly connected to the inner surface of the pressure plate (44). The threaded rod (45) is inserted into the surface of the movable ring (42). The threaded rod (45) is threadedly connected to the inner surface of the water pipe (1). A base plate (46) is fixedly connected to the surface of the threaded rod (45). The base plate (46) is placed on the surface of the pressure plate (44).