Multistage upper sealing type fluorine-lined butterfly valve
The PTFE-lined butterfly valve, with its multi-stage top sealing structure and intelligent design, solves the leakage and energy loss problems of traditional butterfly valves under high pressure, high temperature and corrosive media conditions, achieving sealing reliability and system stability, reducing operating costs and providing intelligent management capabilities.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG SOFUDA VALVE CO LTD
- Filing Date
- 2025-04-09
- Publication Date
- 2026-04-17
AI Technical Summary
Traditional butterfly valves are prone to leakage under high pressure, high temperature and corrosive media conditions, and lack intelligent functions, making it difficult to monitor valve status in real time and dynamically adjust valve opening, resulting in system instability and energy loss.
It adopts a multi-level top sealing structure, including metal, elastic and soft sealing components, combined with pressure and flow sensors, and integrates a smart box for real-time monitoring and dynamic adjustment to achieve a three-level gradient seal, and enables remote management through a processor and communication module.
It significantly reduces media leakage, improves sealing reliability and stability, lowers operating costs, optimizes media flow, avoids energy loss, and enables intelligent management and remote monitoring of valves.
Smart Images
Figure CN224135194U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of fluoropolymer-lined butterfly valve technology, and in particular to a multi-stage top-sealed fluoropolymer-lined butterfly valve. Background Technology
[0002] A butterfly valve is a valve that controls the flow of fluid or regulates its flow rate by rotating a valve plate. It is simple in structure, small in size, and lightweight, and is widely used in industries such as chemical, petroleum, pharmaceutical, and food processing. The origin of butterfly valves can be traced back to the early 20th century, initially used in low-pressure, normal-temperature water systems. With advancements in materials science and manufacturing technology, butterfly valves have gradually expanded into applications involving high pressure, high temperature, and corrosive media. Fluoropolymer-lined butterfly valves are a special type of valve developed from traditional butterfly valves. Their core feature is the lining of the valve body and valve plate surface with fluoroplastics (such as polytetrafluoroethylene, PTFE). Fluoroplastics possess excellent corrosion resistance, a low coefficient of friction, and good sealing performance, enabling fluoropolymer-lined butterfly valves to withstand corrosive media such as strong acids, strong alkalis, and organic solvents.
[0003] Traditional butterfly valves mostly adopt a single-stage sealing structure, which is difficult to cope with complex working conditions such as high pressure, high temperature and corrosive media. They are prone to leakage, affecting system stability and energy efficiency. In addition, they lack intelligent functions. Traditional butterfly valves cannot monitor the valve status in real time and cannot dynamically adjust the valve opening, which can easily cause excessive throttling and energy loss. Therefore, we propose a multi-stage top-sealed fluoropolymer-lined butterfly valve. Utility Model Content
[0004] The purpose of this invention is to provide a multi-stage top-sealed fluoropolymer-lined butterfly valve to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, the present invention adopts the following technical solution:
[0006] A multi-stage top-sealed fluoropolymer-lined butterfly valve includes a fluoropolymer-lined butterfly valve body, a first connecting shell at the top of the fluoropolymer-lined butterfly valve body, and a second connecting shell at the bottom of the fluoropolymer-lined butterfly valve body. A connecting seat is bolted to the top of the first connecting shell, a drive motor is mounted on the top of the connecting seat, and a smart box is mounted on the back of the drive motor. A valve plate is disposed inside the fluoropolymer-lined butterfly valve body. Rotation channels are opened inside both the first and second connecting shells. A rotation shaft is disposed inside the valve plate, and sealing components are disposed in each rotation channel. A transition layer is disposed around the valve plate, and a fluoropolymer coating layer is disposed outside the transition layer.
[0007] As a preferred embodiment of this utility model, flanges are fixedly connected to both the front and back of the PTFE-lined butterfly valve housing.
[0008] As a preferred embodiment of this utility model, the flange is provided with a plurality of mounting holes that extend around it.
[0009] As a preferred embodiment of this utility model, one end of the bottom of the rotating shaft extends into the rotating channel opened inside the second connecting housing and is rotatably connected thereto.
[0010] As a preferred embodiment of this utility model, a connecting seat extends from the top end of the rotating shaft and connects to the output end of the drive motor.
[0011] As a preferred embodiment of this utility model, the sealing assembly includes a first sealing ring, a second sealing ring, and a third sealing ring. The first sealing ring is the main sealing layer and is made of metal. The second sealing ring is a dynamic compensation layer and is made of elastic sealing ring. The third sealing ring is a soft sealing layer and is made of soft sealing filler.
[0012] As a preferred embodiment of this utility model, a pressure sensor and a flow sensor are provided on one side of the periphery of the PTFE-lined butterfly valve housing, and the detection probes of the pressure sensor and the flow sensor are located inside the PTFE-lined butterfly valve housing.
[0013] As a preferred embodiment of this utility model, the smart box includes a processor, a battery, a communication module, a controller, and an alarm module.
[0014] Compared with the prior art, the beneficial effects of this utility model are:
[0015] 1. In this invention, the design of the sealing component significantly reduces the possibility of media leakage, ensuring the sealing reliability of the valve under high pressure, high temperature, and corrosive media conditions. This not only improves sealing performance but also positively impacts the overall performance of the valve (for example, by reducing leakage, media loss and system pressure loss are reduced, improving system energy efficiency). Simultaneously, the reliability and durability of the sealing component enhance the stability and service life of the valve, reducing the frequency of maintenance and replacement, and lowering long-term operating costs.
[0016] 2. This utility model integrates a processor, battery, communication module, controller, and alarm module to achieve real-time monitoring and remote management of valve status. It collects data in real time through pressure and flow sensors, dynamically adjusts valve opening, optimizes medium flow, and avoids energy loss caused by excessive throttling. The battery provides backup power to ensure that basic monitoring and alarm functions can still be maintained when power is lost. The communication module uploads the valve status to the cloud platform to achieve remote monitoring and fault diagnosis. The alarm module triggers audible and visual alarms or shutdown signals based on preset thresholds (such as sudden pressure rise or abnormal flow) to prevent overpressure pipe bursts or medium leakage accidents. Attached Figure Description
[0017] Figure 1A schematic diagram of the overall structure of a multi-stage top-sealed fluoropolymer-lined butterfly valve provided by this utility model;
[0018] Figure 2 A schematic diagram of the internal structure of a multi-stage top-sealed fluoropolymer-lined butterfly valve provided by this utility model;
[0019] Figure 3 An enlarged schematic diagram of the structure of area A of a multi-stage top-sealed fluoropolymer-lined butterfly valve provided by this utility model;
[0020] Figure 4 This is a schematic diagram of the internal structure of a smart box for a multi-stage top-sealed fluoropolymer-lined butterfly valve provided by this utility model.
[0021] Legend: 1. Fluoropolymer-lined butterfly valve body; 2. Flange; 201. Mounting hole; 3. First connecting housing; 301. Second connecting housing; 302. Connecting seat; 303. Drive motor; 4. Smart box; 401. Processor; 402. Battery; 403. Communication module; 404. Controller; 405. Alarm module; 5. Valve plate; 501. Rotating shaft; 502. Transition layer; 503. Fluoroplastic coating layer; 6. Rotation channel; 7. Sealing assembly; 701. First sealing ring; 702. Second sealing ring; 703. Third sealing ring; 8. Pressure sensor; 801. Flow sensor. Detailed Implementation
[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all 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 protection scope of the present utility model.
[0023] To facilitate understanding of this utility model, a more comprehensive description of this utility model will be provided below with reference to relevant embodiments, and several embodiments of this utility model are given. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of this utility model more thorough and complete.
[0024] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.
[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.
[0026] Example 1
[0027] like Figure 1-4As shown, this utility model provides a technical solution: a multi-stage top-sealed PTFE-lined butterfly valve, including a PTFE-lined butterfly valve body 1, a first connecting housing 3 at the top of the PTFE-lined butterfly valve body 1, a second connecting housing 301 at the bottom of the PTFE-lined butterfly valve body 1, a connecting seat 302 bolted to the top of the first connecting housing 3, a drive motor 303 at the top of the connecting seat 302, a valve plate 5 inside the PTFE-lined butterfly valve body 1, a rotation channel 6 inside both the first connecting housing 3 and the second connecting housing 301, a rotation shaft 501 inside the valve plate 5, and sealing components 7 inside each rotation channel 6, the sealing components 7 including a first sealing ring 701, a second sealing ring 702 and a third sealing ring 702. Ring 703, the first sealing ring 701 is the main sealing layer, made of metal (such as stainless steel 316L, Hastelloy C276, or Monel alloy), serving as the first-level seal, withstanding high-pressure impacts and temperature fluctuations of the medium. The rigid structure of the metal material prevents leakage between the valve plate 5 and the valve seat due to pressure deformation. The second sealing ring 702 is a dynamic compensation layer, made of elastic sealing ring (such as fluororubber FKM, EPDM, or PTFE-coated rubber), serving as the second-level seal, using elastic deformation to compensate for the axial / radial clearance when the valve plate 5 rotates. The third sealing ring 703 is a soft sealing layer, made of soft sealing packing (such as expanded graphite or flexible graphite). (+metal wire reinforced or PTFE+glass fiber composite material) serves as the third-level seal, filling minute gaps and blocking residual media leakage; the synergistic effect of the three-level seal: the first sealing ring 701 (metal) bears the main pressure, the second sealing ring 702 (elastic) absorbs dynamic fluctuations, and the third sealing ring 703 (soft seal) achieves the final seal, forming a "hard-elastic-soft" three-level gradient seal, progressively reducing the risk of leakage. For example, under high pressure impact, the metal sealing ring blocks large flow media, the elastic sealing ring adapts to the micro-displacement of the valve plate 5, and the soft seal filler fills the residual gaps; a transition layer 502 is provided around the valve plate 5, and a fluoroplastic coating layer 503 is provided outside the transition layer 502. 2 serves as an intermediate medium between the metal valve plate 5 and the fluoroplastic layer, enhancing the bonding strength between the two through chemical bonds or mechanical interlocking. This prevents the fluoroplastic from peeling off due to thermal expansion and contraction or mechanical stress, absorbs vibration and pressure fluctuations when the valve plate 5 is in contact with the medium, reduces cracks or detachment of the fluoroplastic layer due to fatigue, fills micropores on the metal surface, and prevents corrosive media from penetrating into the metal matrix. The transition layer 502 can be selected from materials such as perfluoroethylene propylene (FEP / F46) or modified polytetrafluoroethylene (PTFE+carbon fiber), which have both high adhesion and corrosion resistance. The fluoroplastic coating layer 503 can be selected from soluble polytetrafluoroethylene (PFA) material, which has better temperature resistance and stronger impermeability. The two are used together for better results.
[0028] Example 2
[0029] like Figure 1-4As shown, this utility model provides a technical solution: a multi-stage top-sealed PTFE-lined butterfly valve. Flanges 2 are fixedly connected to both the front and back of the PTFE-lined butterfly valve housing 1. Multiple mounting holes 201 are circumferentially formed on the flanges 2. The design of the flanges 2 on the front and back of the housing allows for standardized bolt connections to pipelines via the mounting holes 201, reducing on-site welding requirements and lowering the risk of leakage. A smart box 4 is installed on the back of the drive motor 303. A pressure sensor 8 and a flow sensor 801 are installed on one side of the PTFE-lined butterfly valve housing 1. The detection probes of the pressure sensor 8 and the flow sensor 801 are located inside the PTFE-lined butterfly valve housing 1. The smart box 4 includes a processor 401, a battery 402, a communication module 403, a controller 404, and an alarm module 405. The processor 401 analyzes the data from the pressure and flow sensors 801 and dynamically adjusts the valve opening (via the controller 405). 04 Adjust the drive motor 303 to optimize the medium flow; the battery 402 provides backup power to ensure that basic monitoring and alarm functions (such as leakage warning) can still be maintained when power is lost; the communication module 403 uploads the valve status (pressure, flow, sealing performance) to the cloud platform to realize remote monitoring and fault diagnosis; the alarm module 405 triggers audible and visual alarms or shutdown signals according to preset thresholds (such as pressure surge, abnormal flow) to prevent overpressure pipe bursts or medium leakage accidents; the embedded design of pressure sensor 8 and flow sensor 801 allows the sensor probes to directly contact the medium and collect pressure and flow data in real time; pressure sensor 8 detects sudden drops or abnormal fluctuations in internal pressure of the valve body, and combined with data from flow sensor 801 (such as mismatch between flow and valve opening), provides early warning of sealing failure or internal leakage risk; the valve opening is adjusted through flow feedback to avoid energy loss caused by excessive throttling.
[0030] The working process of this utility model is as follows: When using a multi-stage top-sealed PTFE-lined butterfly valve, the controller 404 of the smart box 4 receives external commands (such as remote signals or local operations), and the drive motor 303 drives the valve plate 5 to rotate via the rotating shaft 501, adjusting the valve opening and controlling the medium flow. When the valve plate 5 rotates, the first sealing ring 701 (metal) withstands the impact of high-pressure medium to prevent deformation and leakage; the second sealing ring 702 (elastic body) compensates for the dynamic gap between the valve plate 5 and the valve seat through deformation; the third sealing ring 703 (soft seal) fills the residual gap and blocks minor leaks. The pressure sensor 8 monitors the valve in real time. When the internal pressure changes, the flow sensor 801 detects the medium flow rate and compares it with the valve opening data. The processor 401 analyzes the sensor data to determine the sealing status (e.g., a sudden drop in pressure indicates leakage, abnormal flow indicates blockage). The data is uploaded to the cloud platform via the communication module 403 to generate an operation report. The controller 404 automatically adjusts the drive motor 303 to optimize the valve opening to match the operating conditions. The alarm module 405 triggers an audible and visual alarm or a shutdown signal (e.g., pressure exceeding limits, seal failure). The battery 402 provides backup power and maintains the operation of the sensor and alarm module 405 during power failure to prevent sudden leakage accidents.
[0031] 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 multi-stage top-seal fluoropolymer-lined butterfly valve comprising a fluoropolymer-lined butterfly valve housing (1), characterized in that: The top of the fluoropolymer-lined butterfly valve housing (1) is provided with a first connecting housing (3), and the bottom of the fluoropolymer-lined butterfly valve housing (1) is provided with a second connecting housing (301). The top of the first connecting housing (3) is bolted to a connecting seat (302). The top of the connecting seat (302) is provided with a drive motor (303). The back of the drive motor (303) is provided with a smart box (4). The inside of the fluoropolymer-lined butterfly valve housing (1) is provided with a valve plate (5). The first connecting housing (3) and the second connecting housing (301) are both provided with a rotation channel (6). The inside of the valve plate (5) is provided with a rotation shaft (501). The rotation channel (6) is provided with a sealing component (7). The outside of the valve plate (5) is provided with a transition layer (502). The outside of the transition layer (502) is provided with a fluoropolymer coating layer (503). The sealing assembly (7) includes a first sealing ring (701), a second sealing ring (702), and a third sealing ring (703). The first sealing ring (701) is the main sealing layer and is made of metal. The second sealing ring (702) is the dynamic compensation layer and is made of elastic. The third sealing ring (703) is the soft sealing layer and is made of soft sealing filler.
2. The multi-stage upper seal type fluorine-lined butterfly valve according to claim 1, characterized in that: The PTFE-lined butterfly valve housing (1) has flanges (2) fixedly connected to both the front and back sides.
3. A multi-stage top-seal fluoropolymer lined butterfly valve as claimed in claim 2, wherein: The flange (2) has multiple mounting holes (201) that are circumferentially through it.
4. The multi-stage top-seal fluoropolymer-lined butterfly valve according to claim 1, wherein: The bottom end of the rotating shaft (501) extends into the rotating channel (6) opened inside the second connecting housing (301) and is rotatably connected thereto.
5. The multi-stage top-seal fluoropolymer-lined butterfly valve according to claim 1, wherein: One end of the rotating shaft (501) extends into a connecting seat (302) and connects to the output end of the drive motor (303).
6. A multi-stage top-seal fluoropolymer lined butterfly valve as claimed in claim 1, wherein: A pressure sensor (8) and a flow sensor (801) are provided on one side of the periphery of the PTFE-lined butterfly valve housing (1), and the detection probes of the pressure sensor (8) and the flow sensor (801) are located inside the PTFE-lined butterfly valve housing (1).
7. The multi-stage top-seal fluoropolymer-lined butterfly valve according to claim 1, wherein: The smart box (4) includes a processor (401), a battery (402), a communication module (403), a controller (404), and an alarm module (405).