Noise reduction and rotation prevention lifting check valve
By setting a channel and limiting guide structure inside the lifting check valve, the problems of wear and noise between the guide rod and the guide sleeve are solved, enabling smooth discharge of the medium and stable operation of the valve, and eliminating safety hazards.
Patent Information
- Application Number
- CN202511154452.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-18
- Publication Date
- 2025-11-07
AI Technical Summary
Existing lift-type check valves generate noise during media flow due to wear and impact between the guide rod and guide sleeve, and the media is not easily discharged, increasing movement resistance and posing safety hazards.
A channel connecting the flow path inside the valve seat and the cavity is provided in the lift check valve, and a limiting guide structure, such as a through hole and a limiting guide groove, is adopted to ensure smooth discharge of the medium, reduce the probability of valve core rotation and oscillation, and eliminate wear and noise.
It effectively reduces motion resistance, lowers the probability of valve core rotation and oscillation, eliminates abnormal noise and wear between the guide rod and guide sleeve, and improves the stability and safety of the valve.
Smart Images
Figure CN120906985A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of valve-related technology, and in particular to a silent, anti-rotation lift check valve. Background Technology
[0002] A lift check valve is a type of valve that automatically opens and closes its disc by relying on the flow of the medium itself. Its main function is to prevent backflow of the medium and to prevent the pump and drive motor from reversing. It is also known as a non-return valve, backflow valve, one-way valve, or back pressure valve.
[0003] like Figure 1 As shown, the lift check valve includes a valve seat 1, a valve cover 3, and a valve core 2. A guide sleeve is provided in the middle of the valve cover, and a guide rod is provided in the middle of the valve core. The guide rod moves up and down along the guide sleeve and is rotatably set inside the guide sleeve. A circular valve disc is fixed to the bottom of the guide rod. There is a cavity between the guide rod and the guide sleeve.
[0004] The valve opens when the inlet pressure exceeds the sum of the valve disc's weight and its resistance to movement. Conversely, the valve closes when the medium flows backward.
[0005] To allow the valve core to move freely, a certain radial clearance is left between the guide rod on the valve core and the guide sleeve on the valve cover. When the valve core is subjected to an unbalanced force from the medium, the valve core may rotate, causing the clearance between the guide rod and the guide sleeve to gradually increase due to wear. This leads to oscillation during rotation, resulting in friction between the guide rod and the guide sleeve, as well as impact between the valve disc and the valve seat wall, which generates noise.
[0006] Check valves are generally in the open state and only close in emergency situations or when there is a pipeline malfunction to prevent backflow of the medium. Therefore, the wear or impact between the guide rod and the guide sleeve due to rotation is long-term and continuous. When conveying explosive and flammable media, such impact or friction will also bring serious safety hazards.
[0007] Meanwhile, because there is a certain radial gap between the guide rod on the valve core and the guide sleeve on the valve cover, the medium inside the valve enters the movement stroke cavity of the guide sleeve through the gap. When the check valve is opened, the medium is not easy to be discharged, which increases the movement resistance, delays the opening process, and increases the probability of the valve core rotating or swinging during the opening process. Summary of the Invention
[0008] To solve the above-mentioned technical problems, the present invention designs a silent and anti-rotation lifting check valve.
[0009] The present invention adopts the following technical solution: The application discloses a sound-damping and anti-rotation lifting check valve, which comprises a valve seat, a valve cover and a valve core, a guide sleeve is arranged in the middle of the valve cover, a guide rod is arranged in the middle of the valve core, the guide rod moves up and down along the guide sleeve, and the guide rod is rotatably arranged in the guide sleeve; a circular valve clack is fixed to the bottom of the guide rod; a cavity is formed between the guide rod and the guide sleeve; a channel is arranged in the lifting check valve and is connected with the flow channel in the valve seat and the cavity; and a limiting guide structure is arranged between the valve cover and the valve core. The channel connected with the flow channel in the valve seat and the cavity is arranged, so that the medium in the cavity can be smoothly and timely discharged when the check valve is opened, the movement resistance is reduced, the probability of rotation and swing of the valve core in the opening process is reduced, the rotation between the guide rod and the guide sleeve is limited by the limiting guide structure, the abnormal sound and abrasion caused by the interaction between the guide rod and the guide sleeve are eliminated, and the related safety hazards are eliminated.
[0010] Preferably, the channel is a through hole, and the through hole is arranged on the upper portion of the guide sleeve.
[0011] Preferably, the through holes are arranged in pairs and symmetrically along the circumference.
[0012] Preferably, the channel is a flow guide hole, and the flow guide hole is arranged on the guide rod.
[0013] Preferably, the flow guide hole comprises a vertical flow guide hole and a horizontal flow guide hole, the horizontal flow guide hole is arranged on the lower portion of the guide rod and is uniformly distributed along the circumference of the guide rod.
[0014] Preferably, the limiting guide structure comprises a groove and a stop piece, the groove is arranged on the bottom of the guide sleeve, the stop piece is correspondingly arranged on the lower portion of the guide rod, and the groove and the stop piece are matched.
[0015] Preferably, the groove and the stop piece are arranged in pairs and symmetrically.
[0016] Preferably, the limiting guide structure comprises a guide groove and a guide key, the guide key is arranged on the outer wall of the guide rod, the guide groove is arranged on the inner wall of the guide sleeve, and the guide key is guided along the guide groove.
[0017] Preferably, the guide groove and the guide key are arranged in pairs and symmetrically.
[0018] The application has the following beneficial effects: (1) the channel connected with the flow channel in the valve seat and the cavity is arranged, so that the medium in the cavity can be smoothly and timely discharged when the check valve is opened, the movement resistance is reduced, the probability of rotation and swing of the valve core in the opening process is reduced; (2) the limiting guide structure can limit the rotation between the guide rod and the guide sleeve, eliminate the abnormal sound and abrasion caused by the interaction between the guide rod and the guide sleeve, and eliminate the related safety hazards. BRIEF DESCRIPTION OF DRAWINGS
[0019] Figure 1 is a structural schematic view of an existing lifting check valve; Figure 2 is Figure 1 a sectional view along the A-A direction in
[0020] Figure 3 is a structural schematic view of the present application; Figure 4 is a structural schematic view of embodiment 2 of the present application; In the figure: 1, valve seat; 2, valve core; 2.1, circular valve flap; 2.2, guide rod; 2.3, stop piece; 3, valve cover; 3.1, guide sleeve; 3.1.1, through hole; 3.1.2, recess; 4, cavity; 5, guide key; 6, flow guide hole. DETAILED DESCRIPTION
[0021] The technical solutions of the present application are described in further detail below through specific embodiments and in conjunction with the drawings: Embodiment 1: As shown in Figures 2-3 , a sound-damping and anti-rotation lift check valve includes a valve seat 1, a valve cover 3, and a valve core 2. The valve cover 3 is provided with a guide sleeve 3.1 in the middle, and the valve core 2 is provided with a guide rod 2.2 in the middle. The guide rod 2.2 moves up and down along the guide sleeve 3.1, and the guide rod 2.2 is rotationally arranged in the guide sleeve 3.1. The bottom of the guide rod 2.2 is fixedly connected with a circular valve flap 2.1. There is a cavity 4 between the guide rod 2.2 and the guide sleeve 3.1. After the fluid medium enters from the inlet of the valve seat 1, it will produce an external force on the circular valve flap 2.1 on the valve core 2, pushing the guide rod 2.2 to move upwards along the guide sleeve 3.1 provided on the valve cover 3, thereby making the cavity 4 between the guide rod 2.2 and the guide sleeve 3.1 smaller. Through the through hole 3.1.1 provided at the top of the guide sleeve 3.1, the medium in the cavity is smoothly and timely discharged, reducing the movement resistance.
[0022] The through holes generally appear in pairs, which is conducive to the uniform discharge of the medium in the cavity, ensuring the stability and flexibility of the valve core movement. The through holes can also be a plurality of holes uniformly distributed in the circumference.
[0023] When the valve core 2 is subjected to unbalanced external force, the valve core 2 will also rotate or swing. During the rotation process, the stop piece 2.3 on the valve core will automatically fall into the recess 3.1.2 provided at the bottom of the guide sleeve 3.1, thereby playing an anti-rotation role.
[0024] The stop pieces generally appear in pairs and are symmetrical, which is conducive to the balance of the center of gravity of the valve core, ensuring the stability of the valve core movement.
[0025] Embodiment 2: As shown in Figure 4 , the guide rod and the guide sleeve can also use the guide key 5 and the guide slot to play an anti-rotation role. The medium in the cavity between the guide rod and the guide sleeve can also be discharged through the flow guide hole 6 provided on the guide rod, thereby reducing the movement resistance.
[0026] The above-described embodiments are only preferred embodiments of the present application, and are not intended to limit the present application in any form. Other variations and modifications can be made without departing from the technical scope of the present application.
Claims
1. A silent, anti-rotation lift check valve, comprising a valve seat, a valve cover, and a valve core, wherein a guide sleeve is provided in the center of the valve cover, and a guide rod is provided in the center of the valve core; the guide rod moves up and down along the guide sleeve, and is rotatably disposed within the guide sleeve; a circular valve disc is fixedly connected to the bottom of the guide rod; and there is a cavity between the guide rod and the guide sleeve, characterized in that... The lift check valve is internally provided with a passage connecting the inner flow channel and the cavity, and a limiting guide structure is arranged between the valve cover and the valve core.
2. A sound attenuating anti-rotation lift check valve according to claim 1, wherein, The passage is a through hole arranged on the upper portion of the guide sleeve.
3. A sound attenuating anti-whirling lift check valve according to claim 2, wherein, The through holes are arranged in pairs and symmetrically along the circumference.
4. The sound attenuating anti-whirling lift check valve of claim 1, wherein, The passage is a flow guide hole arranged on the guide rod.
5. A sound attenuating anti-whirling lift check valve according to claim 4 wherein, The flow guide hole includes vertical flow guide holes and horizontal flow guide holes, and the horizontal flow guide holes are arranged on the lower portion of the guide rod and are uniformly distributed along the circumference of the guide rod.
6. The sound attenuating anti-whirling lift check valve of claim 1 wherein, The limiting guide structure includes a groove arranged on the bottom of the guide sleeve and a stopper arranged on the lower portion of the guide rod, and the groove and the stopper are matched.
7. A sound attenuating anti-whirling lift check valve according to claim 6 wherein, The groove and the stopper are arranged in pairs and symmetrically.
8. The sound attenuating anti-whirling lift check valve of claim 1 wherein, The limiting guide structure includes a guide groove and a guide key, the guide key is arranged on the outer wall of the guide rod, the guide groove is arranged on the inner wall of the guide sleeve, and the guide key is matched along the guide groove.
9. The sound attenuating anti-whirling lift check valve of claim 1 wherein, The guide groove and the guide key are arranged in pairs and symmetrically.