A fluoropolymer-lined butterfly valve that prevents media leakage

Abstract

This utility model relates to the field of control valve technology, and more particularly to a fluoropolymer-lined butterfly valve that prevents media leakage. It includes: a valve body, a valve stem disposed within the valve body, a valve disc disposed at the bottom of the valve stem, a drive assembly disposed at the top of the valve stem, and a shock-absorbing assembly disposed at the bottom of the valve body. This utility model, by incorporating the drive assembly, allows reflective indicator lights to help operators quickly and accurately locate the operating handle in low-light environments, improving operational convenience and efficiency. Furthermore, 12 reflective indicator lights are evenly distributed on the top of the valve body outside the valve stem, working in conjunction with reflective indicator lights to clearly indicate the valve stem rotation angle; each alignment represents a 30-degree rotation of the valve stem. Operators can then precisely adjust the valve disc opening to meet the precise control requirements of media flow under different operating conditions.

Description

Technical Field

[0001] This utility model relates to the field of control valve technology, and in particular to a fluoropolymer-lined butterfly valve that can prevent media leakage. Background Technology

[0002] A fluoropolymer-lined butterfly valve is a type of valve that uses a disc-shaped butterfly plate as its opening and closing element and has a fluoropolymer-lined valve body. It controls the flow and shut-off of fluids by rotating the butterfly plate and is suitable for pipeline systems containing highly corrosive media.

[0003] However, when using traditional PTFE-lined butterfly valves, the vibration generated by the flow of the medium within the valve body can adversely affect its sealing performance, easily leading to loosening of the sealing fit between the valve disc and the valve body, and thus causing medium leakage. At the same time, the vibration will also accelerate the wear of internal parts of the valve body, shortening the service life of the valve. Secondly, traditional PTFE-lined butterfly valves require a handwheel or actuator to be installed at the upper end of the valve body to drive the valve stem to rotate. However, in working environments with complex pipeline layouts, space constraints are prominent. Either the space is too small to install the handwheel or actuator, making operation inconvenient, or there is simply not enough installation space, which seriously hinders the normal use of the butterfly valve.

[0004] Prior art 1 (Chinese patent application number CN202021074027.2, application date 2020-06-11) discloses a fluoropolymer-lined butterfly valve. The valve stem is provided with a synchronously rotating drive disc at the drive end. A handle groove is provided radially through the upper end surface of the drive disc. An operating rod is hinged to one end of the handle groove. The length of the operating rod is longer than the handle groove. The operating rod has a retracted state in the handle groove and an operating state in which it is flipped out of the handle groove as the valve stem rotation force application position. A reset member is provided between the operating rod and the handle groove to reset the operating rod from the operating state to the retracted state. A limit feedback mechanism is provided between the drive disc and the valve body to limit the rotation by a certain amount of angle and provide feedback to the operator. With the above solution, the drive structure of the fluoropolymer-lined butterfly valve is more compact.

[0005] Prior art 2 (Chinese patent application number CN202122788332.9, application date 2021-11-15) discloses a novel fluoropolymer-lined butterfly valve. A valve stem is rotatably mounted on the surface of the butterfly valve body, and a valve plate is fixedly mounted on the outer wall of the valve stem. The surface of the valve plate is symmetrically provided with installation and disassembly mechanisms, and the surface of the valve plate is also provided with anti-corrosion components. The installation and disassembly mechanisms include two arc-shaped push plates, and the outer wall of the valve plate is evenly distributed with expansion holes. When fluid passes through the valve plate, since the valve plate is inside the anti-corrosion liner, the anti-corrosion liner prevents the valve plate from being corroded by the corrosiveness of the fluid, thus conveniently realizing the anti-corrosion protection of the valve plate, and effectively avoiding the corrosion of the valve plate by the fluid flow, thereby improving the service life of the butterfly valve body. Utility Model Content

[0006] The purpose of this invention is to provide a fluoropolymer-lined butterfly valve that can prevent media leakage, so as to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: it includes a valve body, a valve stem is disposed within the valve body, a valve disc is disposed at the bottom of the valve stem, a drive assembly is disposed at the top of the valve stem, and a shock-absorbing assembly is disposed at the bottom of the valve body.

[0008] As a preferred embodiment of this invention, both the inner wall of the valve body and the valve disc are provided with a fluoropolymer lining, a sealing gasket is provided on the inner wall of the valve body, and an air bladder is provided on the outer side of the valve disc.

[0009] As a preferred embodiment of this utility model, the drive assembly includes an operating handle disposed on the top of the valve stem, a reflective indicator light 1 disposed on one side of the operating handle, several reflective indicator lights 2 disposed on the top of the valve body outside the valve stem, and a mounting bracket disposed on the bottom of the operating handle on the side away from the reflective indicator light 1.

[0010] As a preferred embodiment of this utility model, a limiting rod is provided through the mounting frame, a disc is provided on the limiting rod, a spring is provided between the disc and the inner top surface of the mounting frame, an operating handle is provided through the limiting rod, a round handle is provided at the top of the limiting rod, a pair of male buckles are provided on the limiting rod at the bottom of the disc, a female buckle is provided on the inner wall of one side of the mounting frame, a limiting plate is provided on the top of the valve body outside the valve stem, and limiting holes are provided on the limiting plate at the positions corresponding to the second reflective indicator light.

[0011] As a preferred embodiment of the present invention, the shock absorption assembly includes a connecting seat disposed at the bottom of the valve body, a pair of connecting members symmetrically disposed on both sides of the connecting seat, a support seat disposed at the bottom of the connecting seat, and bolts disposed between the two connecting members and the support seat.

[0012] As a preferred embodiment of this utility model, a large U-shaped frame is provided directly below the support base, a small U-shaped frame is provided inside the large U-shaped frame, a pair of guide posts are symmetrically arranged on both sides of the top of the small U-shaped frame, and guide sleeves are provided on both sides of the large U-shaped frame corresponding to the positions of the guide posts.

[0013] As a preferred embodiment of this utility model, a pair of oil storage cylinders are symmetrically arranged on both sides of the bottom of the large U-shaped frame, and piston rods are arranged on both sides of the small U-shaped frame corresponding to the positions of the oil storage cylinders. A piston is arranged at the bottom of each of the two piston rods, and the piston is slidably arranged inside the oil storage cylinder. A spring is arranged between the top of the piston rod and the bottom of the oil storage cylinder.

[0014] Compared with the prior art, the above-mentioned technical solution of this utility model has the following beneficial technical effects:

[0015] 1. This utility model, through the setting of a drive component, allows the reflective indicator light one to help operators quickly and accurately locate the position of the operating handle in dimly lit environments, improving the convenience and efficiency of operation. Secondly, 12 reflective indicator lights two are evenly arranged on the top of the valve body outside the valve stem. Working in conjunction with reflective indicator light one, they clearly indicate the valve stem rotation angle; each alignment represents a 30-degree rotation of the valve stem. Operators can then precisely adjust the valve opening to meet the precise control requirements of media flow under different operating conditions. Furthermore, the limit rod, spring one, male buckle, female buckle, and limit... The combination of the position plate and the valve plate allows the male and female buckles to engage when the operator rotates the operating handle, preventing the limit rod from sliding accidentally. When it is necessary to fix the operating handle, the operator can pull the round handle upward to separate the male and female buckles, rotate the limit rod 90 degrees, and insert it into the corresponding limit hole of the position plate to effectively limit the valve stem. At the same time, the spring provides a downward reset force for the limit rod, making the limit rod firmly locked in the limit hole, preventing the valve stem from rotating accidentally and changing the valve disc opening, ensuring the valve operates stably at the set opening, and guaranteeing the reliability and safety of the valve operation.

[0016] 2. This utility model, by setting up a shock-absorbing component, transmits vibrations generated when the medium flows within the valve body to the support seat via the connecting seat, and then to the small U-shaped frame. The cooperation between the guide post and the guide sleeve ensures the stability of the small U-shaped frame's movement within the large U-shaped frame, preventing swaying or displacement during movement and guaranteeing the reliability of the shock-absorbing effect. Secondly, the spring absorbs energy and expands / contracts during vibration, providing initial shock absorption and responding quickly to vibrations, thus buffering them initially. Simultaneously, the small U-shaped frame pushes the piston rod and piston one to move within the oil reservoir. The internal space of the oil reservoir is divided into two chambers, and the hydraulic oil flows repeatedly between the two chambers. The friction between the orifice wall and the hydraulic oil, as well as the internal friction between the hydraulic oil molecules, generates a damping force. This force, in conjunction with the spring force, further absorbs vibration energy. This dual damping mechanism greatly improves the damping effect. In addition, the damping force can also reduce the spring's rebound speed, preventing the spring from causing secondary vibration damage to the valve body due to rapid rebound. This effectively extends the service life of the valve body, ensuring that the PTFE-lined butterfly valve can still operate normally in a vibration environment, maintain good sealing performance, and prevent media leakage. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the drive component structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the limiting rod structure in the drive assembly of this utility model;

[0020] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0021] Figure 5 This is a schematic diagram of the shock absorption component structure of this utility model;

[0022] Figure 6 This is a schematic diagram of the spring structure in the shock absorption component of this utility model.

[0023] Reference numerals: Valve body 1, Valve stem 2, Valve disc 3, Drive assembly 4, Operating handle 41, Reflective indicator light one 42, Reflective indicator light two 43, Mounting bracket 44, Limiting rod 45, Round handle 46, Round disc 47, Spring one 48, Male buckle 49, Female buckle 410, Limiting disc 411, Limiting hole 412, Shock absorption assembly 5, Connecting seat 51, Connecting piece 52, Support seat 53, Bolt 54, Large U-shaped bracket 55, Small U-shaped bracket 56, Guide post 57, Guide sleeve 58, Oil reservoir 59, Piston rod 510, Piston one 511, Spring two 512, Sealing gasket 6, Airbag 7. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of this utility model.

[0025] like Figures 1-6 As shown, the present invention proposes a fluoropolymer-lined butterfly valve that can prevent media leakage. It includes a valve body 1, a valve stem 2 disposed inside the valve body 1, a valve disc 3 disposed at the bottom of the valve stem 2, a drive assembly 4 disposed at the top of the valve stem 2, and a shock-absorbing assembly 5 disposed at the bottom of the valve body 1.

[0026] Both the inner wall of the valve body 1 and the valve disc 3 are lined with fluoropolymer. The fluoropolymer lining acts as a corrosion protectant, preventing the valve body 1 and valve disc 3 from being corroded by the medium and extending their service life. A sealing gasket 6 is provided on the inner wall of the valve body 1, and an air bladder 7 is provided on the outer side of the valve disc 3. The air bladder 7 cooperates with the sealing gasket 6 to fill the gap between the valve disc 3 and the valve body 1 when the valve disc 3 is closed, improving the sealing effect and preventing medium leakage.

[0027] The drive assembly 4 includes an operating handle 41 located on the top of the valve stem 2. The operating handle 41 is manually operated by the operator. By rotating it, the valve stem 2 is rotated, thereby opening and closing the valve disc 3. A reflective indicator light 42 is provided on one side of the operating handle 41. The reflective indicator light 42 can help the operator quickly locate the position of the operating handle 41 in low light conditions. Several reflective indicator lights 43 are provided on the top of the valve body 1 outside the valve stem 2. The reflective indicator lights 43 are evenly distributed around the top circumference of the valve body 1 outside the valve stem 2. They work in conjunction with the reflective indicator lights 42 to indicate the rotation angle of the valve stem 2 and assist the operator in accurately adjusting the opening degree of the valve disc 3. A mounting bracket 44 is provided at the bottom of the operating handle 41 on the side away from the reflective indicator lights 42.

[0028] A limiting rod 45 is installed through the mounting bracket 44. The limiting rod 45 is inserted into the limiting hole 412 on the limiting plate 411 to limit the valve stem 2, preventing the valve stem 2 from accidentally rotating and changing the opening of the valve disc 3. A disc 47 is provided on the limiting rod 45, which provides a mounting base for the spring 48. The spring 48 is installed between the disc 47 and the inner top surface of the mounting bracket 44, and provides a downward reset force for the limiting rod 45, ensuring that the limiting rod 45 is firmly locked in the limiting hole 412 on the limiting plate 411. The limiting rod 45 passes through the operating handle 41, and a round handle 46 is provided at the top of the limiting rod 45. When the operator pulls up and down and rotates the limiting rod 45, a pair of male buckles 49 are provided on the limiting rod 45 at the bottom of the disc 47, and a female buckle 410 is provided on the inner wall of one side of the mounting bracket 44. The male buckle 49 and the female buckle 410 cooperate to fix the limiting rod 45 on the mounting bracket 44 when the operator adjusts the operating handle 41, preventing the limiting rod 45 from moving accidentally. A limiting plate 411 is provided on the top of the valve body 1 outside the valve stem 2. Limiting holes 412 are opened on the limiting plate 411 at the positions corresponding to the second reflective indicator light 43. Limiting holes 412 are evenly opened on the limiting plate 411, which cooperate with the limiting rod 45 to limit the valve stem 2.

[0029] The vibration damping assembly 5 includes a connecting seat 51 located at the bottom of the valve body 1. The connecting seat 51 provides connection and support between the valve body 1 and the support seat 53, and transmits the vibration received by the valve body 1 to the support seat 53. A pair of connecting members 52 are symmetrically arranged on both sides of the connecting seat 51. The connecting members 52 are connected to the support seat 53 by bolts 54, which serve to fix and connect them. The support seat 53 is located at the bottom of the connecting seat 51. Bolts 54 are provided between the two connecting members 52 and the support seat 53. The support seat 53 provides bottom support for the valve body 1, bears the weight of the valve body 1 and the pressure generated by the flow of the medium, and transmits the vibration to the small U-shaped frame 56.

[0030] A large U-shaped frame 55 is installed directly below the support base 53. The large U-shaped frame 55 provides the installation base for the small U-shaped frame 56. The small U-shaped frame 56 is installed inside the large U-shaped frame 55. The small U-shaped frame 56 moves up and down during vibration, which drives the spring to extend and retract, and at the same time pushes the piston rod 510 and piston 511. A pair of guide posts 57 are symmetrically arranged on both sides of the top of the small U-shaped frame 56. Guide sleeves 58 are provided on both sides of the large U-shaped frame 55 at the positions corresponding to the guide posts 57. The cooperation between the guide posts 57 and the guide sleeves 58 can ensure the stability of the small U-shaped frame 56 when it moves.

[0031] A pair of oil reservoirs 59 are symmetrically arranged on both sides of the bottom of the large U-shaped frame 55. The oil reservoirs 59 store hydraulic oil. Piston rods 510 are arranged on both sides of the small U-shaped frame 56 corresponding to the positions of the oil reservoirs 59. The piston rods 510 transmit the up and down movement of the small U-shaped frame 56 to piston 511. Piston 511 is arranged at the bottom of both piston rods 510. Piston 511 is slidably arranged in the oil reservoir 59. Spring 512 is arranged between the top of the piston rod 510 and the bottom of the oil reservoir 59. Piston 511 divides the internal space of the oil reservoir 59 into two chambers. By moving in the oil reservoir 59, the hydraulic oil is squeezed, generating damping force, which, together with the spring, achieves the shock absorption and buffering effect.

[0032] Working principle: When the PTFE-lined butterfly valve is in the closed state, the air bladder 7 on the outside of the valve disc 3 and the sealing gasket 6 on the inner wall of the valve body 1 are tightly fitted, which can effectively prevent media leakage. When it is necessary to adjust the opening of the valve disc 3 of the PTFE-lined butterfly valve, if the ambient light is dim, the operator can quickly locate the position of the operating handle 41 by observing the reflective indicator light 42 on the operating handle 41. Then, according to the actual needs, the operating handle 41 is rotated, which drives the valve stem 2 to rotate, and the valve stem 2 then drives the valve disc 3 to rotate, thereby realizing the opening or closing of the valve disc 3. There are 12 reflective indicator lights 43 evenly arranged on the top circumference of the valve body 1. Whenever... When reflective indicator light 42 aligns with one of the reflective indicator lights 43, it means that valve stem 2 has rotated 30 degrees. The operator can accurately adjust the opening of valve disc 3 according to the alignment of the reflective indicator lights. After adjusting the opening of valve disc 3, the operator pulls the round handle 46 upward to lift the limit rod 45, so that the male buckle 49 on the limit rod 45 separates from the female buckle 410 on the inner wall of the mounting bracket 44. Then, the limit rod 45 is rotated 90 degrees and inserted into the corresponding limit hole 412 on the limit plate 411. At this time, the limit rod 45 can limit the valve stem 2 and prevent the valve stem 2 from rotating accidentally and changing the opening of valve disc 3.

[0033] When the medium flows inside the valve body 1, the valve body 1 will be subjected to vibrations generated by the medium flow. The vibrations are first transmitted to the support seat 53 through the connecting seat 51, and then transmitted to the small U-shaped frame by the support seat 53. The guide post 57 and the guide sleeve 58 cooperate with each other to ensure that the small U-shaped frame 56 remains stable when moving inside the large U-shaped frame 55. The second spring 512 absorbs energy and expands and contracts during the vibration, playing a preliminary damping role. At the same time, the small U-shaped frame 56 pushes the piston rod 510 and the first piston 511 to move inside the oil reservoir 59. The first piston 511 pushes the oil reservoir 59... The internal space is divided into two chambers. The hydraulic oil in the oil reservoir 59 flows repeatedly between the two chambers through different small holes on the piston 511. The friction between the hole wall and the hydraulic oil, as well as the internal friction between the hydraulic oil molecules, will hinder the flow of hydraulic oil, thereby generating a damping force. The damping force and the elastic force of the spring 512 work together to further absorb vibration energy and reduce the rebound speed of the spring 512, so as to avoid secondary vibration damage to the valve body 1, ensure that the PTFE-lined butterfly valve can operate normally, maintain good sealing performance, and prevent media leakage.

[0034] It should be understood that the specific embodiments described above are merely illustrative or explanatory of the principles of this utility model and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of this utility model should be included within its protection scope. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. A fluorine-lined butterfly valve that prevents leakage of a medium, comprising: A valve body (1) is provided inside the valve body (1), and a valve stem (2) is provided at the bottom of the valve stem (2), characterized in that: a drive assembly (4) is provided at the top of the valve stem (2), and a shock-absorbing assembly (5) is provided at the bottom of the valve body (1).

2. The fluorine-coated butterfly valve capable of preventing medium leakage according to claim 1, characterized in that: The inner wall of the valve body (1) and the valve disc (3) are both provided with a fluoropolymer lining. A sealing gasket (6) is provided on the inner wall of the valve body (1), and an airbag (7) is provided on the outer side of the valve disc (3).

3. A fluoropolymer-lined butterfly valve for preventing media leakage according to claim 2, characterized in that: The drive assembly (4) includes an operating handle (41) located on the top of the valve stem (2). A reflective indicator light (42) is provided on one side of the operating handle (41). Several reflective indicator lights (43) are provided on the top of the valve body (1) outside the valve stem (2). A mounting bracket (44) is provided on the bottom of the operating handle (41) away from the reflective indicator light (42).

4. The fluorine-coated butterfly valve capable of preventing medium leakage according to claim 3, characterized in that: A limiting rod (45) is provided through the mounting bracket (44). A disc (47) is provided on the limiting rod (45). A spring (48) is provided between the disc (47) and the inner top surface of the mounting bracket (44). An operating handle (41) is provided through the limiting rod (45). A round handle (46) is provided at the top of the limiting rod (45). A pair of male buckles (49) are provided on the limiting rod (45) at the bottom of the disc (47). A female buckle (410) is provided on the inner wall of one side of the mounting bracket (44). A limiting plate (411) is provided on the top of the valve body (1) outside the valve stem (2). A limiting hole (412) is provided on the limiting plate (411) at the position corresponding to the second reflective indicator light (43).

5. The fluorine-coated butterfly valve capable of preventing medium leakage according to claim 4, characterized in that: The shock absorption assembly (5) includes a connecting seat (51) disposed at the bottom of the valve body (1). A pair of connecting parts (52) are symmetrically arranged on both sides of the connecting seat (51). A support seat (53) is disposed at the bottom of the connecting seat (51). Bolts (54) are disposed between the two connecting parts (52) and the support seat (53).

6. The fluorine-coated butterfly valve capable of preventing medium leakage according to claim 5, characterized in that: A large U-shaped frame (55) is provided directly below the support base (53), and a small U-shaped frame (56) is provided inside the large U-shaped frame (55). A pair of guide posts (57) are symmetrically arranged on both sides of the top of the small U-shaped frame (56), and guide sleeves (58) are provided on both sides of the large U-shaped frame (55) corresponding to the guide posts (57).

7. The fluorine-coated butterfly valve capable of preventing medium leakage according to claim 6, characterized in that: A pair of oil reservoirs (59) are symmetrically arranged on both sides of the bottom of the large U-shaped frame (55). Piston rods (510) are arranged on both sides of the small U-shaped frame (56) corresponding to the positions of the oil reservoirs (59). A piston (511) is arranged at the bottom of each of the two piston rods (510). The piston (511) is slidably arranged in the oil reservoir (59). A spring (512) is arranged between the top of the piston rod (510) and the bottom of the oil reservoir (59).

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