Corrosion-resistant one-way valve

Abstract

The utility model provides a corrosion-resistant one-way valve. The corrosion-resistant one-way valve comprises a valve body, a valve rod and a blocking barrel. The valve body comprises a fixed sleeve and a flow guide pipe arranged on the fixed sleeve; the valve rod extends into the fixed sleeve and is in threaded connection with the fixed sleeve, and an air groove is formed between the valve rod and the fixed sleeve; the blocking cylinder is arranged on the valve rod, the blocking cylinder and the valve rod are integrally connected, and the diameter of the blocking cylinder is larger than that of the fixing sleeve in the radial direction of the blocking cylinder, so that the fixing sleeve is sleeved with the blocking cylinder, and the air groove is blocked.

Description

Technical Field

[0001] This application relates to the field of check valves, and more particularly to a corrosion-resistant check valve. Background Technology

[0002] In existing check valve designs, a threaded connection structure with a threaded rod and a fixed sleeve is commonly used to achieve the valve's opening and closing functions. This structure changes the internal channel area of ​​the valve by rotating the threaded rod, thus controlling the fluid flow rate. However, this threaded connection structure has a significant drawback: a certain amount of clearance inevitably exists between the threads. When the check valve is exposed to the external environment for a long time, these clearances can easily become channels for corrosive media such as rainwater and moisture to enter. Once corrosive media enter the thread clearance, they will gradually corrode the materials of the threaded rod and the fixed sleeve, reducing their mechanical strength and sealing performance, thereby affecting the normal service life and reliability of the check valve.

[0003] Therefore, there is a need for a corrosion-resistant check valve that prevents the valve stem from corrosion caused by the intrusion of corrosive media. Utility Model Content

[0004] In view of this, it is necessary to provide a corrosion-resistant check valve that prevents the valve stem from corrosion caused by the intrusion of corrosive media, in order to solve the above problems.

[0005] Embodiments of this application provide a corrosion-resistant one-way valve, comprising:

[0006] The valve body includes a fixed sleeve and a guide tube disposed on the fixed sleeve;

[0007] A valve stem extends into the fixed sleeve and is threadedly connected to the fixed sleeve, with an air groove formed between the valve stem and the fixed sleeve;

[0008] A blocking cylinder is disposed on the valve stem. The blocking cylinder is integrally connected to the valve stem, and the diameter of the blocking cylinder is larger than the diameter of the fixed sleeve along the radial direction of the blocking cylinder, so that the blocking cylinder is sleeved on the fixed sleeve and blocks the air groove.

[0009] In at least one embodiment of this application, the mounting groove is provided inside the fixed sleeve, the mounting groove is located near the blocking cylinder, and the valve stem further includes a first sealing ring, the first sealing ring sliding within the mounting groove.

[0010] In at least one embodiment of this application, the fixing sleeve further has a threaded groove, which is disposed adjacent to the mounting groove;

[0011] The valve stem has a threaded rod, which is located between the first sealing ring and the blocking cylinder, and the threaded rod is located within the threaded groove.

[0012] In at least one embodiment of this application, the fixed sleeve further includes a sliding groove, which is located at one end away from the threaded groove;

[0013] The valve stem also has a sliding rod, which is arranged adjacent to the threaded rod and slides within the sliding groove.

[0014] In at least one embodiment of this application, the blocking cylinder includes:

[0015] A connecting portion is formed along the radial direction of the blocking cylinder and is connected to the valve stem;

[0016] An extension portion is connected to the connecting portion and is attached to the outer peripheral surface of the fixed sleeve, and is disposed opposite to the threaded rod.

[0017] In at least one embodiment of this application, the axial length of the extension is greater than the axial length of the threaded rod.

[0018] In at least one embodiment of this application, the valve stem further includes a handwheel and a plugging valve, the handwheel being located at one end of the valve stem, the plugging valve being located at the other end of the valve stem, and the plugging valve being located inside the guide pipe.

[0019] In at least one embodiment of this application, the fixing sleeve further includes a second sealing ring, which is sandwiched between the fixing sleeve and the guide tube.

[0020] In at least one embodiment of this application, the second sealing ring is made of soft plastic material.

[0021] In at least one embodiment of this application, the guide pipe has a first pipe and a second pipe, the first pipe and the second pipe are connected, and there is a through port opened along the valve stem between the first pipe and the second pipe, and the pipe blocking valve can be embedded in the through port.

[0022] The aforementioned corrosion-resistant check valve features a valve body designed with a fixed sleeve and a guide tube, providing a stable flow path for the fluid. The valve stem is threadedly connected to the fixed sleeve, enabling the check valve to open and close. A baffle cylinder, integrally connected to the valve stem and radially fitted onto the fixed sleeve, directly seals the air gap, significantly enhancing the check valve's sealing performance. Furthermore, the baffle cylinder effectively isolates corrosive media from contact with the threaded structure, greatly improving the check valve's corrosion resistance and extending its service life. Attached Figure Description

[0023] Figure 1 This is a front view schematic diagram of a corrosion-resistant one-way valve in an embodiment of this application.

[0024] Figure 2 This is a schematic diagram of the cross-sectional structure of a corrosion-resistant check valve when it is closed.

[0025] Figure 3 This is a schematic diagram of the cross-sectional structure of a corrosion-resistant check valve when it is open.

[0026] Explanation of main component symbols

[0027] 100. A corrosion-resistant one-way valve; 10. Valve body; 11. Fixed sleeve; 111. Mounting groove; 112. Threaded groove; 12. Guide pipe; 121. First pipe; 122. Second pipe; 123. Through port; 13. Second sealing ring; 113. Sliding groove; 20. Valve stem; 21. First sealing ring; 22. Threaded rod; 23. Sliding rod; 24. Handwheel; 25. Pipe-blocking valve; 30. Blocking cylinder; 31. Connecting part; 32. Extension part. Detailed Implementation

[0028] The embodiments of this application will now be described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0029] It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or may also have an intervening component. When a component is considered to be "placed" on another component, it can be directly placed on the other component or may also have an intervening component. The terms "top," "bottom," "upper," "lower," "left," "right," "front," "back," and similar expressions used in this article are for illustrative purposes only.

[0030] Embodiments of this application provide a corrosion-resistant one-way valve.

[0031] The aforementioned corrosion-resistant check valve features a valve body designed with a fixed sleeve and a guide tube, providing a stable flow path for the fluid. The valve stem is threadedly connected to the fixed sleeve, enabling the check valve to open and close. A baffle cylinder, integrally connected to the valve stem and radially fitted onto the fixed sleeve, directly seals the air gap, significantly enhancing the check valve's sealing performance. Furthermore, the baffle cylinder effectively isolates corrosive media from contact with the threaded structure, greatly improving the check valve's corrosion resistance and extending its service life.

[0032] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0033] according to Figures 1-3 This application provides a corrosion-resistant one-way valve 100, including: valve body 10, valve stem 20 and blocking cylinder 30.

[0034] The valve body 10 includes a fixed sleeve 11 and a guide tube 12 disposed on the fixed sleeve 11; a valve stem 20, which extends into the fixed sleeve 11 and is threadedly connected to the fixed sleeve 11, with an air groove formed between the valve stem 20 and the fixed sleeve 11; and a blocking cylinder 30 disposed on the valve stem 20, which is integrally connected to the valve stem 20, and the diameter of the blocking cylinder 30 is larger than the diameter of the fixed sleeve 11 along the radial direction of the blocking cylinder 30, so that the blocking cylinder 30 is fitted onto the fixed sleeve 11 and blocks the air groove.

[0035] Specifically, the fixed sleeve 11 serves as the foundation for the threaded connection of the valve stem 20, providing stable support and guidance for the valve stem 20, ensuring smooth axial movement during rotation. The guide tube 12 guides the flow direction of fluid within the check valve, ensuring smooth passage through the check valve along a predetermined path. The threaded connection between the valve stem 20 and the fixed sleeve 11 enables the valve's opening and closing functions. By rotating the valve stem 20, the relative position between the valve stem 20 and the fixed sleeve 11 can be changed, thereby controlling the opening and closing of the fluid passage.

[0036] Furthermore, the air groove is a slot formed when the valve stem 20 and the fixed sleeve 11 are threaded together. The air groove becomes a channel for corrosive media to enter, thereby corroding the valve stem 20 and the fixed sleeve 11.

[0037] Furthermore, the blocking cylinder 30 is integrally connected to the valve stem 20, ensuring a fixed connection and synchronous movement between the blocking cylinder 30 and the valve stem 20. The diameter of the blocking cylinder 30 is larger than that of the fixed sleeve 11, allowing it to be fitted onto the fixed sleeve 11 and effectively sealing the air groove to prevent corrosive media from entering the threaded structure through the air groove.

[0038] In summary, when the check valve is closed, the threaded connection between the valve stem 20 and the fixed sleeve 11 seals the fluid passage. To open the check valve, the valve stem 20 is rotated, causing it to move axially relative to the fixed sleeve 11, gradually opening the fluid passage. During this process, the baffle cylinder 30 remains fitted onto the fixed sleeve 11, sealing the air groove and preventing corrosive media from entering. When the valve stem 20 reaches a certain position, the fluid passage is fully open, allowing fluid to flow smoothly through the check valve. To close the check valve, the valve stem 20 is rotated in the opposite direction, causing it to move axially in the opposite direction relative to the fixed sleeve 11, gradually closing the fluid passage. Similarly, the baffle cylinder 30 seals the air groove throughout the entire process.

[0039] In one specific embodiment, the mounting groove 111 is provided in the fixed sleeve 11, the mounting groove 111 is located near the blocking cylinder 30, and the valve stem 20 also includes a first sealing ring 21, the first sealing ring 21 sliding in the mounting groove 111.

[0040] Specifically, the mounting groove 111 is formed inside the fixed sleeve 11, near the stop cylinder 30, providing space for the installation of the first sealing ring 21. The design of the mounting groove 111 ensures that the first sealing ring 21 can be stably installed inside the fixed sleeve 11 and fitted onto the corresponding part of the valve stem 20. The first sealing ring 21 can slide within the mounting groove 111 and move in tandem with the valve stem 20. The first sealing ring 21 is made of soft rubber and its main function is to seal the gap between the valve stem 20 and the fixed sleeve 11, preventing fluid leakage or entry into the interior.

[0041] In one specific embodiment, the fixed sleeve 11 also has a threaded groove 112, which is arranged adjacent to the mounting groove 111; the valve stem 20 has a threaded rod 22, which is located between the first sealing ring 21 and the blocking cylinder 30, and the threaded rod 22 is located in the threaded groove 112.

[0042] Specifically, the threaded groove 112 is formed inside the fixed sleeve 11 and is adjacent to the mounting groove 111, providing space for the installation and mating of the threaded rod 22 of the valve stem 20. The mating of the threaded groove 112 and the threaded rod 22 realizes the threaded connection between the valve stem 20 and the fixed sleeve 11, allowing the valve stem 20 to move axially relative to the fixed sleeve 11, thereby controlling the opening and closing of the one-way valve. Along the axial direction of the valve stem 20, the stop cylinder 30, the threaded rod 22, and the first sealing ring 21 are sequentially installed on the valve stem 20, and correspondingly, the threaded groove 112 and the mounting groove 111 are sequentially formed inside the fixed sleeve 11.

[0043] In one specific embodiment, the fixed sleeve 11 further includes a sliding groove 113, which is located at one end away from the threaded groove 112; the valve stem 20 also has a sliding rod 23, which is arranged adjacent to the threaded rod 22, and the sliding rod 23 slides within the sliding groove 113.

[0044] Specifically, the sliding groove 113 is formed inside the fixed sleeve 11 and located at the end away from the threaded groove 112, providing space for the installation and sliding of the sliding rod 23 of the valve stem 20. The sliding rod 23 is disposed on the valve stem 20, adjacent to the threaded rod 22, and slides within the sliding groove 113. When the valve stem 20 moves axially relative to the fixed sleeve 11, the sliding rod 23 slides within the sliding groove 113, providing additional support and guidance for the valve stem 20.

[0045] In one specific embodiment, the blocking cylinder 30 includes: a connecting portion 31, formed along the radial direction of the blocking cylinder 30 and connected to the valve stem 20; and an extension portion 32, which is connected to the connecting portion 31 and is attached to the outer peripheral surface of the fixing sleeve 11 and is disposed opposite to the threaded rod 22.

[0046] Specifically, the connecting portion 31 is formed along the radial direction of the blocking cylinder 30 and connects to the valve stem 20, achieving an integral connection between the blocking cylinder 30 and the valve stem 20. This also enhances the structural strength between the blocking cylinder 30 and the valve stem 20, improving the overall stability of the check valve. The extension portion 32 is connected to the connecting portion 31 and abuts against the outer circumferential surface of the fixed sleeve 11, opposite to the threaded rod 22. The main function of the extension portion 32 is to seal the air groove between the fixed sleeve 11 and the valve stem 20, preventing corrosive media from entering the threaded structure through the air groove.

[0047] Furthermore, the attachment design of the extension 32 completely seals the air groove, effectively isolating the corrosive medium from contact with the threaded structure and improving the corrosion resistance of the check valve.

[0048] In summary, when the one-way valve is in the closed state, the threaded rod 22 on the valve stem 20 is tightly fitted into the threaded groove 112 of the fixed sleeve 11, and the sliding rod 23 is located at one end of the sliding groove 113. The connecting part 31 of the blocking cylinder 30 is tightly connected to the valve stem 20, and the extension part 32 is attached to the outer peripheral surface of the fixed sleeve 11, sealing the air groove. At this time, the first sealing ring 21 is tightly fitted into the mounting groove 111 to prevent fluid leakage.

[0049] When the check valve needs to be opened, rotating the valve stem 20 causes the threaded rod 22 to move axially within the threaded groove 112, moving the valve stem 20 relative to the fixed sleeve 11 in the opening direction. Simultaneously, the sliding rod 23 slides within the sliding groove 113, providing additional support and guidance for the valve stem 20. The blocking cylinder 30 moves with the valve stem 20, but the extension 32 remains attached to the outer circumferential surface of the fixed sleeve 11, maintaining the seal against the air groove. During this process, the first sealing ring 21 slides within the mounting groove 111, maintaining tight contact with the mounting groove 111 to ensure a proper seal.

[0050] When the valve stem 20 moves to a certain position, the fluid passage is fully opened, allowing fluid to pass smoothly through the check valve. At this time, the threaded rod 22 remains tightly fitted within the threaded groove 112, the sliding rod 23 is positioned in the corresponding position of the sliding groove 113, and the extension 32 of the blocking cylinder 30 continues to seal the air groove, preventing the intrusion of corrosive media. The first sealing ring 21 remains tightly fitted within the mounting groove 111, preventing fluid leakage.

[0051] When the check valve needs to be closed, the valve stem 20 is rotated in the reverse direction, and the threaded rod 22 moves axially in the opposite direction within the threaded groove 112, causing the valve stem 20 to move relative to the fixed sleeve 11 in the closing direction. Simultaneously, the sliding rod 23 slides in the reverse direction within the sliding groove 113, and the blocking cylinder 30 returns to its initial position as the valve stem 20 moves. When the valve stem 20 reaches the closed position, the threaded rod 22 again engages tightly within the threaded groove 112, the sliding rod 23 returns to one end of the sliding groove 113, and the extension 32 of the blocking cylinder 30 again seals the air groove, ensuring a more reliable closed state for the check valve.

[0052] In one specific embodiment, the axial length of the extension 32 is greater than the axial length of the threaded rod 22.

[0053] Specifically, the axial length of the extension 32 is designed to be longer than that of the threaded rod 22, ensuring that the extension 32 can always completely cover and seal the air gap between the fixed sleeve 11 and the valve stem 20 when the valve stem 20 moves axially. Since the extension 32 always covers the air gap, it provides a more reliable sealing effect and further reduces the risk of corrosive media intrusion.

[0054] In one specific embodiment, the valve stem 20 further includes a handwheel 24 and a pipe-blocking valve 25. The handwheel 24 is located at one end of the valve stem 20, and the pipe-blocking valve 25 is located at the other end of the valve stem 20, and the pipe-blocking valve 25 is located inside the guide pipe 12.

[0055] Specifically, a handwheel 24 is located at one end of the valve stem 20, providing the operator with a convenient and intuitive rotary operating interface. By rotating the handwheel 24, the operator can easily control the rotation of the valve stem 20, thereby opening and closing the one-way valve. A plugging valve 25 is located at the other end of the valve stem 20 and inside the guide pipe 12. It blocks the guide pipe 12 when necessary, preventing fluid leakage or unnecessary flow through the guide pipe 12.

[0056] In one specific embodiment, the fixing sleeve further includes a second sealing ring 13, which is sandwiched between the fixing sleeve and the guide tube 12.

[0057] Specifically, the second sealing ring 13 is made of soft plastic material.

[0058] Furthermore, the second sealing ring 13 is sandwiched between the fixed sleeve and the guide pipe 12, and its main function is to enhance the sealing performance between the fixed sleeve and the guide pipe 12. Through the elastic deformation of the second sealing ring 13, it can fill the tiny gaps between the fixed sleeve and the guide pipe 12, preventing fluid leakage. The presence of the second sealing ring 13 significantly improves the sealing performance between the fixed sleeve and the guide pipe 12, reducing the risk of fluid leakage due to gaps. The second sealing ring 13 not only provides a sealing function but also enhances the connection strength between the fixed sleeve and the guide pipe 12 to a certain extent, improving the stability of the overall structure.

[0059] In one specific embodiment, the guide pipe 12 has a first pipe 121 and a second pipe 122, the first pipe 121 and the second pipe 122 are connected, and there is a guide port 123 between the first pipe 121 and the second pipe 122 along the valve stem 20, and the pipe blocking valve 25 can be embedded in the guide port 123.

[0060] Specifically, the first pipe 121 and the second pipe 122 are connected to form the main fluid channel. The guide port 123 provides space for the installation and operation of the plugging valve 25. The design of the guide port 123 allows the plugging valve 25 to be embedded within it, thereby achieving the blocking or opening of the guide pipe 12. The design of the plugging valve 25 allows it to be tightly embedded within the guide port 123, thus achieving the blocking of the guide pipe 12. When fluid flow is required, the plugging valve 25 can be removed from the guide port 123 to restore normal fluid flow.

[0061] Therefore, the corrosion-resistant check valve 100 provided above, through the design of the valve body 10 consisting of a fixed sleeve 11 and a guide pipe 12, provides a stable channel for fluid; the valve stem 20 is threadedly connected to the fixed sleeve 11 to realize the opening and closing of the check valve; through the design of the baffle cylinder 30, which is integrally connected to the valve stem 20 and radially sleeved on the fixed sleeve 11, it directly blocks the air groove, thereby significantly enhancing the sealing performance of the check valve. In addition, the presence of the baffle cylinder 30 effectively isolates the contact between corrosive media and the threaded structure, greatly improving the corrosion resistance of the check valve and extending its service life.

[0062] The above description is merely an embodiment of this application. It should be noted that those skilled in the art can make improvements without departing from the inventive concept of this application, but these improvements all fall within the protection scope of this application.

Claims

1. A corrosion-resistant one-way valve, characterized in that, include: The valve body includes a fixed sleeve and a guide tube disposed on the fixed sleeve; A valve stem extends into the fixed sleeve and is threadedly connected to the fixed sleeve, with an air groove formed between the valve stem and the fixed sleeve; A blocking cylinder is disposed on the valve stem. The blocking cylinder is integrally connected to the valve stem, and the diameter of the blocking cylinder is larger than the diameter of the fixed sleeve along the radial direction of the blocking cylinder, so that the blocking cylinder is sleeved on the fixed sleeve and blocks the air groove.

2. The corrosion-resistant check valve according to claim 1, characterized in that, The mounting groove is provided inside the fixed sleeve and is located near the blocking cylinder. The valve stem also includes a first sealing ring, which slides within the mounting groove.

3. The corrosion-resistant check valve according to claim 2, characterized in that, The fixing sleeve also has a threaded groove, which is arranged adjacent to the mounting groove. The valve stem has a threaded rod, which is located between the first sealing ring and the blocking cylinder, and the threaded rod is located within the threaded groove.

4. The corrosion-resistant check valve according to claim 3, characterized in that, The fixed sleeve also includes a sliding groove, which is located at the end away from the threaded groove. The valve stem also has a sliding rod, which is arranged adjacent to the threaded rod and slides within the sliding groove.

5. A corrosion-resistant check valve according to claim 3, characterized in that, The blocking cylinder includes: A connecting portion is formed along the radial direction of the blocking cylinder and is connected to the valve stem; An extension portion is connected to the connecting portion and is attached to the outer peripheral surface of the fixed sleeve, and is disposed opposite to the threaded rod.

6. A corrosion-resistant check valve according to claim 5, characterized in that, The axial length of the extension is greater than the axial length of the threaded rod.

7. A corrosion-resistant check valve according to claim 1, characterized in that, The valve stem also includes a handwheel and a pipe-blocking valve. The handwheel is located at one end of the valve stem, and the pipe-blocking valve is located at the other end of the valve stem, and the pipe-blocking valve is located inside the guide pipe.

8. A corrosion-resistant check valve according to claim 1, characterized in that, The fixed sleeve also includes a second sealing ring, which is sandwiched between the fixed sleeve and the guide pipe.

9. A corrosion-resistant check valve according to claim 8, characterized in that, The second sealing ring is made of soft plastic.

10. A corrosion-resistant check valve according to claim 7, characterized in that, The guide pipe has a first pipe and a second pipe, the first pipe and the second pipe are connected, and there is a guide port opened along the valve stem between the first pipe and the second pipe, and the pipe blocking valve can be embedded in the guide port.

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