Novel fluorine-lined check valve

Abstract

The utility model relates to check valve technical field, concretely for new fluorine -lined check valve, including upper valve body and lower valve body, the inside installation of upper valve body has upper fluoroplastic layer, the inside installation of lower valve body has lower fluoroplastic layer, upper valve body and lower valve body sealed connection, the inside of upper valve body is equipped with the ball check valve, the center side of ball check valve is fixed with annular fluoroplastic layer, further improve the sealing property, improve stable direction, reduce hydraulic leakage risk improve device applicability, through the center side of ball check valve fixed with annular fluoroplastic layer can buffer the inside of upper valve body and lower valve body and block, and then reduce the damage caused by collision, improve the service life of device.

Description

Technical Field

[0001] This utility model relates to the field of check valve technology, specifically a novel fluoropolymer-lined check valve. Background Technology

[0002] In industrial fluid transport systems, check valves play a crucial role. Their core function is to ensure unidirectional flow of the medium and effectively prevent backflow. This function is decisive for ensuring the safe and stable operation of the pipeline system and preventing equipment damage, process disruption, and potential safety risks caused by backflow. In principle, common check valves mainly achieve unidirectional flow control of the medium through the movement of the valve disc. When the medium flows in the forward direction, the fluid pressure pushes the valve disc to open, thus creating a flow path for the medium. Once the medium shows a tendency to flow backward, the fluid pressure and the valve disc's own weight work together to make the valve disc quickly and tightly adhere to the valve seat, blocking the backflow path and achieving the purpose of preventing the medium from flowing back.

[0003] For example, CN213451886U discloses a fluoropolymer-lined check valve, including an upper valve body, a lower valve body, and a spherical check valve disc. The upper and lower valve bodies form a flow channel cavity, and the spherical check valve disc is located within the flow channel cavity. Fluoroplastic layers are provided within the flow channel cavities of both the upper and lower valve bodies. A spherical sealing surface is provided on the surface of the lower valve body that contacts the spherical check valve disc. Parts of the outer flanges of the upper and lower valve bodies are covered with fluoropolymer layers. Grooves are provided on the outer flanges of the upper and lower valve bodies, and a locking structure is provided on the fluoropolymer layer, located within the grooves. The spherical check valve disc of this invention can move freely up and down within the flow channel cavity of the valve body without getting stuck or jammed. The valve body sealing surface uses a spherical sealing surface that fits into another spherical surface, requiring a low sealing pressure and effectively achieving zero leakage at the valve's sealing surface. The thickened fluoroplastic layer can better withstand corrosive substances such as strong acids and alkalis in petrochemical pipelines. However, the existing device can only be installed and fixed with two sets of bolts. When the liquid pressure in the valve body is high, leakage is easy, which poses certain safety hazards. At the same time, when the valve is closed, the heavy valve core will generate a large impact force on the valve seat due to inertia. Over time, this will not only easily cause wear and damage to the valve seat and affect the service life of the valve, but may also cause water hammer effect, causing impact damage to the entire pipeline system. Therefore, it is urgent to design a new type of fluoroplastic-lined check valve to solve the above problems. Utility Model Content

[0004] The purpose of this utility model is to provide a new type of fluoropolymer-lined check valve to solve the problems mentioned in the background art, which only use two sets of bolts for installation and fixation. When the liquid pressure in the valve body is high, leakage is easy to occur, which poses certain safety hazards. At the same time, when the valve is closed, the heavy valve core will generate a large impact force on the valve seat due to inertia. Over time, this will not only easily cause wear and damage to the valve seat and affect the service life of the valve, but may also cause water hammer effect, causing impact damage to the entire pipeline system.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a novel fluoropolymer-lined check valve, comprising an upper valve body and a lower valve body, wherein an upper fluoropolymer layer is installed inside the upper valve body, and a lower fluoropolymer layer is installed inside the lower valve body, the upper valve body and the lower valve body are sealed together, and a spherical check valve disc is provided inside the upper valve body, wherein an annular fluoropolymer layer is fixedly provided on the central side of the spherical check valve disc.

[0006] Preferably, an upper sealing ring is installed on the bottom side of the upper valve body, an upper flow channel cavity is provided in the center of the upper valve body, multiple sets of bolts are installed on the side of the upper sealing ring, and an inner ring groove is opened on the inner side of the bottom of the upper valve body.

[0007] Preferably, the upper fluoroplastic layer includes an upper columnar fluoroplastic layer and an upper spherical fluoroplastic layer, the upper columnar fluoroplastic layer being centrally connected to and penetrating the upper spherical fluoroplastic layer, and the upper columnar fluoroplastic layer and the upper spherical fluoroplastic layer being attached to the inner wall of the upper valve body.

[0008] Preferably, the bottom end of the upper sealing ring is provided with multiple sets of trapezoidal slots, and the center of two sets of trapezoidal slots is provided with an upper connecting hole, and the upper connecting hole is provided with a bolt.

[0009] Preferably, an annular groove is formed on the inner side of the top end of the lower valve body, a lower sealing ring is fixed on the side of the top end of the lower valve body, a lower fluoroplastic layer is installed inside the lower valve body, and a lower flow channel cavity is formed in the center of the lower fluoroplastic layer.

[0010] Preferably, multiple sets of trapezoidal protrusions are fixed at the top of the lower sealing ring, and a lower connecting hole is opened at the center of two sets of trapezoidal protrusions. The trapezoidal protrusions are vertically fitted into the trapezoidal slot, and the lower connecting hole is attached to the upper connecting hole and is threadedly fixed with bolts.

[0011] Preferably, the lower fluoroplastic layer includes a lower columnar fluoroplastic layer and a lower spherical fluoroplastic layer, wherein the top end of the lower columnar fluoroplastic layer and the bottom end of the lower spherical fluoroplastic layer are the same, and the lower columnar fluoroplastic layer and the lower spherical fluoroplastic layer are fitted together inside the lower valve body.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] This new type of fluoropolymer-lined check valve uses bolts to fix the upper sealing ring on the bottom side of the upper valve body and the lower sealing ring on the top of the lower valve body. This design further improves the sealing performance, enhances stability, reduces the risk of hydraulic leakage, and improves the applicability of the device. The annular fluoropolymer layer fixed to the center side of the spherical check valve disc can buffer and block the interior of the upper and lower valve bodies, thereby reducing damage caused by collisions and extending the service life of the device.

[0014] This new type of fluoropolymer-lined check valve features a trapezoidal groove in the upper sealing ring that engages with a trapezoidal protrusion fixed in the lower sealing ring, further enhancing its sealing performance. An inner annular groove on the bottom side of the upper valve body allows for tight contact with the upper spherical fluoropolymer layer, and an annular groove on the top of the lower valve body allows for tight contact with the lower spherical fluoropolymer layer. This design further improves installation sealing and extends the service life of both the upper and lower valve bodies. Attached Figure Description

[0015] Figure 1 This is a frontal view of the exploded diagram of this utility model;

[0016] Figure 2 This is a front view installation diagram of the present invention;

[0017] Figure 3 This is a schematic diagram of the internal structure of the upper valve body of this utility model;

[0018] Figure 4 This is a bottom view of the disassembled upper fluoroplastic layer of this utility model;

[0019] Figure 5 This is a cross-sectional view of the internal structure of the lower valve body of this utility model.

[0020] In the diagram: 1. Upper valve body; 10. Upper fluoroplastic layer; 1001. Upper columnar fluoroplastic layer; 1002. Upper spherical fluoroplastic layer; 101. Inner annular groove; 11. Upper sealing ring; 111. Trapezoidal groove; 112. Upper connecting hole; 12. Bolt; 13. Upper flow channel cavity; 12. Bolt; 2. Lower valve body; 20. Annular groove; 21. Lower sealing ring; 211. Trapezoidal protrusion; 212. Lower connecting hole; 22. Lower fluoroplastic layer; 221. Lower columnar fluoroplastic layer; 222. Lower spherical fluoroplastic layer; 23. Lower flow channel cavity; 3. Spherical check valve disc; 31. Annular fluoroplastic layer. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figures 1-5 One embodiment provided by this utility model:

[0023] A novel fluoropolymer-lined check valve includes an upper valve body 1 and a lower valve body 2. The upper valve body 1 is equipped with an upper fluoropolymer layer 10, and the lower valve body 2 is equipped with a lower fluoropolymer layer 22. The upper valve body 1 and the lower valve body 2 are sealed together. The upper valve body 1 is provided with a spherical check valve disc 3, and an annular fluoropolymer layer 31 is fixed on the center side of the spherical check valve disc 3.

[0024] As a further feature of this invention, an upper sealing ring 11 is installed on the bottom side of the upper valve body 1, an upper flow channel cavity 13 is provided in the center of the upper valve body 1, multiple sets of bolts 12 are installed on the side of the upper sealing ring 11, and an inner ring groove 101 is opened on the inner side of the bottom of the upper valve body 1 to facilitate installation with the lower valve body and improve sealing performance.

[0025] Furthermore, the upper fluoroplastic layer 10 includes an upper columnar fluoroplastic layer 1001 and an upper spherical fluoroplastic layer 1002. The upper columnar fluoroplastic layer 1001 is connected to and penetrates the upper spherical fluoroplastic layer 1002. The upper columnar fluoroplastic layer 1001 and the upper spherical fluoroplastic layer 1002 are attached to the inner wall of the upper valve body 1. Multiple sets of trapezoidal grooves 111 are opened at the bottom end of the upper sealing ring 11. An upper connecting hole 112 is opened at the center of the two sets of trapezoidal grooves 111. The upper connecting hole 112 is equipped with a bolt 12, which can achieve a tight connection with the lower valve body to prevent liquid leakage.

[0026] As a further improvement of this utility model, an annular groove 20 is opened on the inner side of the top of the lower valve body 2, and a lower sealing ring 21 is fixedly provided on the side of the top of the lower valve body 2. A lower fluoroplastic layer 22 is installed inside the lower valve body 2, and a lower flow channel cavity 23 is formed in the center of the lower fluoroplastic layer 22. Multiple sets of trapezoidal protrusions 211 are fixed on the top of the lower sealing ring 21. A lower connecting hole 212 is opened in the center of two sets of trapezoidal protrusions 211. The trapezoidal protrusions 211 are vertically fitted into the trapezoidal groove 111. The lower connecting hole 212 is attached to the upper connecting hole 112 and is threadedly fixed with bolts 12. The lower fluoroplastic layer 22 includes a lower columnar fluoroplastic layer 221 and a lower spherical fluoroplastic layer 222. The top of the lower columnar fluoroplastic layer 221 and the bottom of the lower spherical fluoroplastic layer 222 are connected and installed in close contact inside the lower valve body 2. This design is beneficial to improving the sealing performance and extending the service life of the device.

[0027] Working principle: When using, the user first places the bottom end of the lower valve body 2 on the rubber mounting platform and clamps it. Then, the ball-shaped check valve disc 3 is placed on the upper side of the lower columnar fluoroplastic layer 221 in the lower valve body 2. When placing the ball-shaped check valve disc 3, the lower spherical fluoroplastic layer 31 fixed on the side must be kept horizontal and parallel. Then, the upper sealing ring 11 on the side of the bottom end of the upper valve body 1 is vertically aligned with the lower sealing ring 21. The multiple sets of trapezoidal protrusions 211 at the top of the lower sealing ring 21 are fitted into the trapezoidal slots 111 inside the corresponding upper sealing ring 11. Then, the aligned upper connecting hole 112 and lower connecting hole 212 are threadedly fixed with bolts 12. The above is the complete working principle of this utility model.

[0028] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A novel fluoropolymer-lined check valve, comprising an upper valve body (1) and a lower valve body (2), characterized in that: The upper valve body (1) is equipped with an upper fluoroplastic layer (10), and the lower valve body (2) is equipped with a lower fluoroplastic layer (22). The upper valve body (1) and the lower valve body (2) are sealed together. The upper valve body (1) is provided with a ball-shaped check valve disc (3), and an annular fluoroplastic layer (31) is fixed on the center side of the ball-shaped check valve disc (3).

2. The novel fluoropolymer-lined check valve according to claim 1, characterized in that: An upper sealing ring (11) is installed on the bottom side of the upper valve body (1), and an upper flow channel cavity (13) is provided in the center of the upper valve body (1). Multiple sets of bolts (12) are installed on the side of the upper sealing ring (11), and an inner ring groove (101) is opened on the inner side of the bottom of the upper valve body (1).

3. The novel fluoropolymer-lined check valve according to claim 1, characterized in that: The upper fluoroplastic layer (10) includes an upper columnar fluoroplastic layer (1001) and an upper spherical fluoroplastic layer (1002). The upper columnar fluoroplastic layer (1001) is connected to and penetrates the upper spherical fluoroplastic layer (1002) at its center. The upper columnar fluoroplastic layer (1001) and the upper spherical fluoroplastic layer (1002) are attached to the inner wall of the upper valve body (1).

4. The novel fluoropolymer-lined check valve according to claim 2, characterized in that: The bottom end of the upper sealing ring (11) is provided with multiple sets of trapezoidal slots (111), and the center of the two sets of trapezoidal slots (111) is provided with an upper connecting hole (112), and the upper connecting hole (112) is provided with a bolt (12).

5. The novel fluoropolymer-lined check valve according to claim 1, characterized in that: An annular groove (20) is provided on the inner side of the top of the lower valve body (2), and a lower sealing ring (21) is fixed on the side of the top of the lower valve body (2). A lower fluoroplastic layer (22) is installed inside the lower valve body (2), and a lower flow channel cavity (23) is formed in the center of the lower fluoroplastic layer (22).

6. The novel fluoropolymer-lined check valve according to claim 5, characterized in that: Multiple sets of trapezoidal protrusions (211) are fixed at the top of the lower sealing ring (21). The center of the two sets of trapezoidal protrusions (211) is provided with a lower connecting hole (212). The trapezoidal protrusions (211) are vertically fitted into the trapezoidal slot (111). The lower connecting hole (212) is attached to the upper connecting hole (112) and is threadedly fixed with a bolt (12).

7. The novel fluoropolymer-lined check valve according to claim 5, characterized in that: The lower fluoroplastic layer (22) includes a lower columnar fluoroplastic layer (221) and a lower spherical fluoroplastic layer (222). The top end of the lower columnar fluoroplastic layer (221) and the bottom end of the lower spherical fluoroplastic layer (222) are connected and installed in close contact inside the lower valve body (2).

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