A bidirectional check valve for pipelines

Abstract

This application relates to the field of pipeline equipment technology, and in particular to a bidirectional check valve for pipelines, comprising a housing assembly, a fluid control assembly, and a sealing enhancement assembly. The fluid control assembly achieves bidirectional check function through the cooperation of a drive disc and a locking plate. The sealing enhancement assembly employs an adjustable clamping ring and a multi-seal design to improve sealing performance. The housing assembly enhances structural strength through reinforcing ribs and a high-strength main tube. This application effectively solves the problems of insufficient sealing, short service life, and high maintenance costs of existing bidirectional check valves under high pressure and high temperature conditions, providing a highly efficient, reliable, and versatile bidirectional check valve for pipelines suitable for various industrial scenarios.

Description

Technical Field

[0001] This utility model belongs to the field of pipeline fluid control technology, specifically a bidirectional check valve for pipelines. Background Technology

[0002] With the development of the pipeline equipment field, the application of bidirectional check valves in industrial pipeline systems is becoming increasingly widespread. However, existing bidirectional check valves still have some problems in practical use. For example, some bidirectional check valves have complex structural designs and require high assembly precision, resulting in higher production and maintenance costs. At the same time, in high-pressure or high-speed fluid environments, some check valves may experience insufficient sealing performance and short service life, making it difficult to meet the demands of modern industry for efficient and reliable pipeline equipment.

[0003] A search revealed a "bidirectional backstop device and bidirectional backstop hand crank" with publication number CN106044607B, published on November 16, 2018. This design includes an active fork assembly and a driven fork assembly, achieving bidirectional backstop functionality through an arc-shaped thrust groove, cylindrical rollers, and a thrust spring. While this structure is compact and tightly assembled, the numerous internal components and complex assembly process make it prone to increased radial wobble clearance due to wear during long-term operation, thus affecting the backstop effect and service life. Furthermore, this device is primarily used in the field of lifting clothes racks and has poor adaptability to pipeline fluid control under complex conditions such as high pressure and high temperature, making it difficult to directly apply to industrial pipeline systems.

[0004] A search revealed a "bidirectional non-reverse overrunning clutch" with publication number CN105526280B, published on December 29, 2017. This design achieves torque transmission and bidirectional disengagement through the cooperation of wedge blocks, rollers, and an inner race. While this device offers advantages such as smooth engagement, noiselessness, and simple structure, its design is primarily aimed at marine power transmission systems, limiting its application scenarios. When dealing with pipeline fluid control, its sealing performance and durability may not meet requirements, especially under high-pressure fluid impact, where the fit between the rollers and the inner race may become unstable, leading to backflow prevention failure. Furthermore, this device does not consider the corrosive and abrasive properties of the fluid medium on the materials, potentially resulting in significant maintenance challenges with long-term use.

[0005] The aforementioned problems indicate that current bidirectional check valves on the market still have shortcomings in terms of adaptability to complex operating conditions, sealing performance, and service life. Therefore, this invention provides a bidirectional check valve for pipelines to overcome these deficiencies and offer a more efficient, reliable solution applicable to various industrial scenarios. Utility Model Content

[0006] This utility model relates to a bidirectional check valve for pipelines, comprising a housing assembly, a fluid control assembly, and a sealing reinforcement assembly. The fluid control assembly is installed within the housing assembly, and sealing reinforcement assemblies are disposed on the inner walls of both ends of the housing assembly. The fluid control assembly includes a drive disc, guide grooves, sliding blocks, elastic reset components, limit rings, rotating shafts, locking plates, and damping sheets. Guide grooves are symmetrically formed within the housing assembly, and sliding blocks are slidably connected within the guide grooves. An elastic reset component is fixedly connected to one outer wall of the sliding block, and the other end of the elastic reset component is fixedly connected to the inner wall of the guide groove. A limit ring is fixedly connected to the top of the sliding block, and a rotating shaft is rotatably connected to the inner wall of the limit ring. A locking plate is fixedly connected to the outer wall of the rotating shaft, and a damping sheet is fitted to one outer wall of the locking plate. A drive disc is embedded in the inner wall of the bottom end of the housing assembly, and the outer wall of the drive disc contacts one end of the locking plate.

[0007] The sealing enhancement assembly includes a sealing ring, a clamping ring, an adjusting bolt, and a support base. Annular grooves are formed on the inner walls of both ends of the housing assembly, and the sealing ring is embedded within these grooves. A clamping ring abuts against one side of the outer wall of the sealing ring, and the clamping ring is fixedly connected to the outer wall of the housing assembly by the adjusting bolt. Support bases are also installed on the inner walls of both ends of the housing assembly, and the inner walls of the support bases have positioning grooves that mate with the sealing rings.

[0008] The housing assembly includes a main tube, connecting flanges, and reinforcing ribs. Connecting flanges are fixedly connected to the outer walls of both ends of the main tube, and multiple reinforcing ribs are evenly distributed on the outer walls of the connecting flanges. One end of each reinforcing rib is fixedly connected to the outer wall of the main tube, and the other end extends to the edge of the connecting flange.

[0009] In this invention, the fluid control assembly achieves a bidirectional backflow prevention function through the cooperation of a drive disc and a locking plate. When the fluid flows in the forward direction, the fluid pressure drives the drive disc to rotate, and the outer wall of the drive disc presses against the locking plate, causing the locking plate to rotate around its axis and disengage from the constraint of the limiting ring, thus allowing the fluid to pass through. When the fluid flows in the reverse direction, the fluid pressure acts on the other side of the locking plate, causing the locking plate to re-fit against the limiting ring, and the damping plate increases friction, preventing the fluid from flowing in the reverse direction. The sliding motion of the sliding block in the guide groove, combined with the elastic deformation of the elastic reset component, ensures that the locking plate can quickly respond and return to its initial position under different operating conditions.

[0010] In this invention, the sealing enhancement component improves sealing performance through the cooperation of a sealing ring, a clamping ring, and an adjusting bolt. The sealing ring is embedded in the annular groove of the housing assembly. Radial pressure is applied by the clamping ring, causing the sealing ring to fit tightly into the positioning groove of the support, forming multiple sealing barriers. The adjusting bolt can adjust the pressure of the clamping ring according to actual working conditions to adapt to the corrosiveness and abrasiveness of different media. The positioning groove design of the support further enhances the stability of the sealing ring, preventing seal failure due to fluid impact.

[0011] In this invention, the shell assembly enhances structural strength and durability through the combination of a main tube, connecting flanges, and reinforcing ribs. The main tube is made of high-strength alloy material, capable of withstanding fluid impact under high pressure and high temperature environments. The connecting flange is connected to other pipeline equipment via bolts, and the reinforcing ribs on its outer wall not only improve the bending strength of the connecting flange but also enhance the rigidity of the overall structure, reducing deformation caused by vibration or external loads.

[0012] This invention simplifies the assembly process, reduces the number of parts, and lowers production and maintenance costs through the design of the fluid control components. The cooperation between the sliding block and the guide groove, as well as the application of the elastic reset component, ensures stable performance of the device during long-term operation, preventing increased clearance due to wear. The sealing enhancement component significantly improves sealing performance and extends service life through an adjustable clamping ring and multiple sealing design. The reinforcing ribs of the housing assembly and the selection of high-strength materials for the main tube further enhance the device's adaptability to complex operating conditions.

[0013] This invention solves the problems of insufficient sealing performance, short service life, and high maintenance cost of existing bidirectional check valves under complex working conditions such as high pressure and high temperature through the above-mentioned technical means, and provides a high-efficiency, reliable bidirectional check valve for pipelines that is suitable for various industrial scenarios. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model. Figure 2 This is a schematic diagram of the outer structure of the elastic reset member of this utility model. Figure 3 This is a schematic diagram of the outer structure of the support base of this utility model.

[0015] Figure 4 Schematic diagram of the outer structure of the support base

[0016] The reference numerals in the attached diagram are as follows: 1. Drive disc; 2. Guide groove; 3. Sliding block; 4. Elastic reset component; 5. Limit ring; 6. Rotating shaft; 7. Locking plate; 8. Damping plate; 9. Sealing ring; 10. Pressing ring; 11. Adjusting bolt; 12. Support base; 13. Main tube; 14. Connecting flange; 15. Reinforcing rib. Detailed Implementation

[0017] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0018] Specific implementation examples are given below.

[0019] This utility model provides a bidirectional check valve for pipelines, which will be described below in conjunction with the attached document. Figure 1 To be continued Figure 3 The specific embodiments of this utility model will be described in detail below. Figure 1 The overall structural diagram shows that the bidirectional check valve is mainly composed of a housing assembly, a fluid control assembly, and a sealing reinforcement assembly. The connection relationships, positional relationships, and mutual cooperation relationships of the components of each assembly are as follows.

[0020] The housing assembly includes a main tube 13, connecting flanges 14, and reinforcing ribs 15. The main tube 13 is a cylindrical tubular structure, with connecting flanges 14 fixedly connected to its outer walls at both ends. The connecting flanges 14 are connected to external piping equipment via bolts. Multiple reinforcing ribs 15 are evenly distributed on their outer walls. One end of each reinforcing rib 15 is fixedly connected to the outer wall of the main tube 13, and the other end extends to the edge of the connecting flange 14, thus forming an integral rigid structure. The reinforcing ribs 15 not only improve the bending strength of the connecting flanges 14 but also enhance the overall stability of the housing assembly under high pressure and high temperature environments. Guide grooves 2 are formed on the inner wall of the main tube 13, symmetrically arranged along the axial direction of the main tube 13, to accommodate the sliding block 3 in the fluid control assembly.

[0021] The fluid control assembly includes a drive disc 1, a guide groove 2, a sliding block 3, an elastic reset element 4, a limiting ring 5, a rotating shaft 6, a locking plate 7, and a damping plate 8. The drive disc 1 is embedded in the inner wall of the bottom end of the main tube 13, and its outer wall contacts one end of the locking plate 7. A sliding block 3 is slidably connected within the guide groove 2. An elastic reset element 4 is fixedly connected to one side of the outer wall of the sliding block 3, and the other end of the elastic reset element 4 is fixedly connected to the inner wall of the guide groove 2, allowing the sliding block 3 to reciprocate within the guide groove 2. A limiting ring 5 is fixedly connected to the top of the sliding block 3. A rotating shaft 6 is rotatably connected to the inner wall of the limiting ring 5. A locking plate 7 is fixedly connected to the outer wall of the rotating shaft 6, and a damping plate 8 is attached to one side of the outer wall of the locking plate 7. The locking plate 7 rotates around the limiting ring 5 via the rotating shaft 6. When the fluid flows in the forward direction, the driving disc 1 rotates under the fluid pressure, and its outer wall presses against the locking plate 7, causing the locking plate 7 to rotate around the rotating shaft 6 and break free from the constraint of the limiting ring 5, thus allowing the fluid to pass through. When the fluid flows in the reverse direction, the fluid pressure acts on the other side of the locking plate 7, causing the locking plate 7 to re-fit into the limiting ring 5, and the damping plate 8 increases the friction to prevent the fluid from flowing in the reverse direction. During this process, the sliding movement of the sliding block 3 in the guide groove 2, combined with the elastic deformation of the elastic reset member 4, ensures that the locking plate 7 can respond quickly and return to its initial position under different working conditions.

[0022] The sealing enhancement assembly includes a sealing ring 9, a clamping ring 10, an adjusting bolt 11, and a support base 12. Annular grooves are formed on the inner walls of both ends of the housing assembly, and the sealing ring 9 is embedded within these grooves. The clamping ring 10 abuts against one side of the outer wall of the sealing ring 9. The clamping ring 10 is fixedly connected to the outer wall of the housing assembly by the adjusting bolt 11. The support base 12 is installed on the inner walls of both ends of the housing assembly, and its inner wall has positioning grooves that mate with the sealing ring 9. The sealing ring 9 is embedded in the annular grooves, and radial pressure is applied by the clamping ring 10, causing the sealing ring 9 to fit tightly against the positioning grooves of the support base 12, forming multiple sealing barriers. The adjusting bolt 11 can adjust the pressure of the clamping ring 10 according to actual operating conditions to adapt to the corrosiveness and abrasiveness of different media. The positioning groove design of the support base 12 further enhances the stability of the sealing ring 9, preventing seal failure due to fluid impact.

[0023] During actual operation, when fluid flows in from one end of the main pipe 13, it first passes through the sealing ring 9 of the sealing reinforcement component. The sealing ring 9, through the pressure applied by the clamping ring 10, cooperates with the positioning groove of the support seat 12 to form a tight sealing barrier, preventing fluid leakage. Subsequently, the fluid pushes the drive disc 1 to rotate, and the outer wall of the drive disc 1 squeezes the locking plate 7, causing the locking plate 7 to rotate around the rotating shaft 6 and break free from the constraint of the limiting ring 5, allowing the fluid to pass through. At this time, the sliding block 3 slides in the guide groove 2, and the elastic reset member 4 undergoes elastic deformation, ensuring that the locking plate 7 can quickly respond to changes in fluid pressure. When the fluid flows in the opposite direction, the fluid pressure acts on the other side of the locking plate 7, causing the locking plate 7 to re-fit into the limiting ring 5, and the friction is increased by the damping plate 8, preventing the fluid from flowing in the opposite direction. During this process, the sliding block 3 returns to its initial position under the action of the elastic reset member 4, ensuring that the device maintains stable performance during long-term operation.

[0024] This invention, through the design of the aforementioned specific structure, solves the problems of insufficient sealing performance, short service life, and high maintenance costs of existing bidirectional check valves under complex working conditions such as high pressure and high temperature. The housing assembly, through the combination of the main tube 13, connecting flange 14, and reinforcing rib 15, improves structural strength and durability. The main tube 13 is made of high-strength alloy material, capable of withstanding fluid impact under high pressure and high temperature environments. The fluid control assembly achieves bidirectional check function through the cooperation of the drive disc 1 and the locking plate 7, simplifying the assembly process, reducing the number of parts, and lowering production and maintenance costs. The sealing enhancement assembly significantly improves sealing performance and extends service life through the adjustable clamping ring 10 and multiple sealing design. To better enable those skilled in the art to fully understand and implement this invention, the following supplementary explanation of the specific implementation principle of this invention is provided in conjunction with a specific application scenario.

[0025] In actual industrial piping systems, when fluid enters the main pipe 13 from the external pipe through the connecting flange 14, it first comes into contact with the sealing reinforcement component. At this time, the sealing ring 9 is tightly fitted into the positioning groove of the support seat 12 due to the radial pressure applied by the clamping ring 10, forming multiple sealing barriers. The adjusting bolt 11 adjusts the pressure of the clamping ring 10 according to the actual working conditions to adapt to the corrosiveness and abrasiveness of different media. This design ensures that the sealing ring 9 remains stable even under high pressure or high-speed fluid impact, avoiding seal failure due to fluid impact. During this process, the fluid is effectively blocked outside the sealing ring 9, preventing leakage.

[0026] Subsequently, the fluid drives the drive disc 1 to rotate. Drive disc 1 rotates under fluid pressure, its outer wall contacting one end of the locking plate 7 and compressing it. The locking plate 7 rotates around the limiting ring 5 under the action of the rotating shaft 6, breaking free from the constraint of the limiting ring 5, thus allowing fluid to pass through. During this process, the sliding block 3 slides along the guide groove 2, and the elastic reset member 4 undergoes elastic deformation, ensuring that the locking plate 7 can quickly respond to changes in fluid pressure. This design, through the cooperation of the sliding block 3 and the elastic reset member 4, enables the locking plate 7 to quickly return to its initial position under different operating conditions, ensuring the stability of the device during long-term operation.

[0027] When the fluid flows in the opposite direction, the fluid pressure acts on the other side of the locking plate 7, causing the locking plate 7 to re-fit within the limiting ring 5. The damping plate 8 increases friction during this process, further preventing the fluid from flowing in the opposite direction. The sliding block 3 returns to its initial position under the action of the elastic reset member 4, ensuring stable performance of the device during long-term operation. This design, through the cooperation of the locking plate 7 and the limiting ring 5, achieves a bidirectional backflow prevention function, simplifies the assembly process, reduces the number of parts, and lowers production and maintenance costs.

[0028] Under complex operating conditions such as high pressure and high temperature, the shell assembly enhances structural strength and durability through the combination of the main tube 13, connecting flange 14, and reinforcing ribs 15. The main tube 13 is made of high-strength alloy material, capable of withstanding fluid impacts under high pressure and high temperature environments. The connecting flange 14 is bolted to other piping equipment, and the reinforcing ribs 15 on its outer wall not only improve the bending strength of the connecting flange 14 but also enhance the rigidity of the overall structure, reducing deformation caused by vibration or external loads. This design ensures the adaptability of the device under complex operating conditions.

[0029] The sealing enhancement assembly improves sealing performance through the cooperation of the sealing ring 9, the clamping ring 10, and the adjusting bolt 11. The sealing ring 9 is embedded in the annular groove of the housing assembly. Radial pressure is applied by the clamping ring 10, causing the sealing ring 9 to fit tightly into the positioning groove of the support base 12, forming multiple sealing barriers. The adjusting bolt 11 can adjust the pressure of the clamping ring 10 according to actual operating conditions to adapt to the corrosiveness and abrasiveness of different media. The positioning groove design of the support base 12 further enhances the stability of the sealing ring 9, preventing seal failure due to fluid impact. This design significantly improves sealing performance and extends service life.

[0030] In summary, through the design of the specific structure described above, this utility model solves the problems of insufficient sealing performance, short service life, and high maintenance cost of existing bidirectional check valves under complex working conditions such as high pressure and high temperature, and provides a high-efficiency, reliable bidirectional check valve for pipelines that is suitable for various industrial scenarios.

[0031] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A bidirectional check valve for pipelines, characterized in that, It includes a housing assembly, a fluid control assembly, and a sealing reinforcement assembly. The fluid control assembly is installed inside the housing assembly, and the sealing reinforcement assembly is provided on the inner walls at both ends of the housing assembly. The fluid control assembly includes a drive disk (1), a guide groove (2), a sliding block (3), an elastic reset component (4), a limiting ring (5), a rotating shaft (6), a locking plate (7), and a damping plate (8). The housing assembly has symmetrically provided guide grooves (2). A sliding block (3) is slidably connected in the guide groove (2). An elastic reset component (4) is fixedly connected to one side of the outer wall of the sliding block (3). The other end of the elastic reset component (4) is fixedly connected to the inner wall of the guide groove (2). A limiting ring (5) is fixedly connected to the top of the sliding block (3). A rotating shaft (6) is rotatably connected to the inner wall of the limiting ring (5). A locking plate (7) is fixedly connected to the outer wall of the rotating shaft (6). A damping plate (8) is attached to one side of the outer wall of the locking plate (7). A drive disk (1) is embedded in the inner wall of the bottom end of the housing assembly, and the outer wall of the drive disk (1) is in contact with one end of the locking plate (7). The sealing enhancement assembly includes a sealing ring (9), a clamping ring (10), an adjusting bolt (11), and a support base (12). Annular grooves are provided on the inner walls of both ends of the housing assembly. The sealing ring (9) is embedded in the annular grooves. The clamping ring (10) abuts against one side of the outer wall of the sealing ring (9). The clamping ring (10) is fixedly connected to the outer wall of the housing assembly by the adjusting bolt (11). Support bases (12) are also installed on the inner walls of both ends of the housing assembly. The inner wall of the support base (12) is provided with a positioning groove that cooperates with the sealing ring (9).

2. A bidirectional check valve for pipelines according to claim 1, characterized in that, The housing assembly includes a main tube (13), a connecting flange (14), and reinforcing ribs (15). The connecting flanges (14) are fixedly connected to the outer walls of both ends of the main tube (13). Multiple reinforcing ribs (15) are evenly distributed on the outer wall of the connecting flanges (14). One end of the reinforcing rib (15) is fixedly connected to the outer wall of the main tube (13), and the other end extends to the edge of the connecting flange (14).

3. A bidirectional check valve for pipelines according to claim 1, characterized in that, When the outer wall of the drive disc (1) contacts one end of the locking plate (7), the locking plate (7) rotates around the rotating shaft (6) and breaks free from the constraint of the limiting ring (5).

4. A bidirectional check valve for pipelines according to claim 1, characterized in that, A damping plate (8) is attached to one side of the outer wall of the locking plate (7). The damping plate (8) is used to increase the friction between the locking plate (7) and the limiting ring (5).

5. A bidirectional check valve for pipelines according to claim 1, characterized in that, The sliding movement of the sliding block (3) in the guide groove (2) combined with the elastic deformation of the elastic reset component (4) ensures that the locking plate (7) can respond quickly and return to its initial position under different working conditions.

6. A bidirectional check valve for pipelines according to claim 1, characterized in that, The sealing ring (9) is embedded in the annular groove of the housing assembly. Radial pressure is applied by the clamping ring (10) to make the sealing ring (9) fit tightly in the positioning groove of the support seat (12).

7. A bidirectional check valve for pipelines according to claim 1, characterized in that, The adjusting bolt (11) is used to adjust the pressure of the clamping ring (10).

8. A bidirectional check valve for pipelines according to claim 2, characterized in that, The main tube (13) is made of high-strength alloy material.

9. A bidirectional check valve for pipelines according to claim 2, characterized in that, The connecting flange (14) is connected to other pipeline equipment by bolts.

10. A bidirectional check valve for pipelines according to claim 1, characterized in that, The positioning groove of the support (12) is designed to enhance the stability of the sealing ring (9).

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