Anti-corrosion gate valve protection device

Abstract

The utility model discloses a kind of anti-corrosion gate valve protection devices, relate to gate valve technical field, including gate valve seat, gate valve cover, threaded rod and handle, further including sealing shell and oil storage shell, sealing shell is rotationally connected in handle bottom, oil storage shell is fixedly connected in sealing shell bottom and gate valve cover top, the inner wall of sealing shell is sequentially provided with sealing ring one, wedge-shaped polytetrafluoroethylene packing ring group and sealing ring two from top to bottom, the inside of oil storage shell is provided with oil storage cavity. The utility model effectively blocks external impurities by multistage sealing structure in sealing shell, by the cooperation of oil storage shell, flexible isolation sleeve and groove, isolation oil film is formed on the surface of threaded rod, realize sustained lubrication and prevent electrochemical corrosion, reach the effect of double protection, prolong service life.

Description

Technical Field

[0001] This utility model relates to the field of gate valve technology, and in particular to a corrosion-resistant gate valve protection device. Background Technology

[0002] Gate valves are opening and closing components used in industrial fluid control. In complex working environments such as chemical plants, offshore platforms, or metallurgical plants, gate valves are exposed to environments containing corrosive media, high humidity, or high dust.

[0003] In order to open and close the gate valve, the operating mechanism needs to pass through the gate cover and reciprocate. In order to prevent impurities from the external environment from entering and leakage of the internal medium, the existing gate valve has a packing seal structure between the threaded rod and the gate cover.

[0004] However, with the frequent opening and closing of the gate valve, the reciprocating motion of the threaded rod will cause continuous friction and wear on the packing seal. Over time, the sealing performance of the packing will gradually decline, resulting in a small gap between it and the threaded rod.

[0005] The creation of this gap presents a dual problem: on the one hand, external corrosive impurities, dust, and moisture can penetrate and directly contact the metal surface of the threaded rod; on the other hand, the internal grease used to lubricate and protect the threaded rod may also leak through this gap. Lack of lubrication will exacerbate wear, while contact with corrosive media will trigger electrochemical corrosion, ultimately leading to the threaded rod rusting and malfunction, severely shortening the service life of the gate valve.

[0006] Therefore, this utility model proposes an anti-corrosion gate valve protection device to overcome the shortcomings of the prior art. Utility Model Content

[0007] In view of the problems existing in the anti-corrosion gate valve protection device, such as the single protective structure, easy intrusion of external corrosive impurities, and lubrication failure of internal moving parts, which easily leads to electrochemical corrosion, this utility model aims to provide an anti-corrosion gate valve protection device with an improved structure that can effectively solve the above problems.

[0008] This utility model provides a corrosion-resistant gate valve protection device, including: a gate valve seat, a gate valve cover, a threaded rod, a handle, a sealing shell, and an oil reservoir.

[0009] The gate valve cover is fixedly connected to the top of the gate valve seat, the threaded rod is threaded through the gate valve seat and the gate valve cover, and the handle is fixedly connected to the top of the outer wall of the threaded rod.

[0010] Furthermore, the sealing shell is rotatably connected to the bottom of the handle, the oil reservoir is fixedly connected to the bottom of the sealing shell, and the bottom of the oil reservoir is fixedly connected to the top of the gate valve cover;

[0011] The inner wall of the sealing shell is provided with sealing ring one, wedge-shaped polytetrafluoroethylene packing ring group and sealing ring two;

[0012] The oil storage shell has an oil storage cavity inside, and a flexible isolation sleeve is fixedly connected inside the oil storage cavity. The inner wall of the flexible isolation sleeve has multiple grooves.

[0013] The threaded rod is sequentially inserted into the sealing shell, the first sealing ring, the wedge-shaped polytetrafluoroethylene packing ring group, the second sealing ring, the oil reservoir, and the flexible isolation sleeve.

[0014] Preferably, the first sealing ring, the wedge-shaped PTFE packing ring assembly, and the second sealing ring are sequentially interference-fitted onto the inner wall of the sealing shell from top to bottom. This interference fit ensures the stable installation and reliable sealing of the multi-stage sealing structure within the sealing shell.

[0015] Preferably, an oil inlet is fixedly connected to the top front side of the oil reservoir, and an oil outlet is fixedly connected to the bottom front side of the oil reservoir. This structure facilitates the regular replenishment and circulation of lubricating grease in the oil reservoir, maintaining the cleanliness of the grease.

[0016] Preferably, during the movement of the threaded rod, the flexible isolation sleeve creates a gap with the inner wall of the oil reservoir. The formation of the gap provides a channel for the grease in the oil reservoir cavity to enter the inner wall of the oil reservoir, ensuring that the lubricating grease can reach the inner wall of the flexible isolation sleeve.

[0017] Preferably, the wedge-shaped PTFE packing rings, with their wedge-shaped structure, are used to fill impurities entering the sealing shell, and their special geometry captures and prevents tiny particles from penetrating deeper, serving as a fine protective layer.

[0018] Preferably, the sealing ring is used to block impurities from entering the interior of the sealing shell. As the outermost first physical barrier, it mainly prevents larger particles of foreign matter or dust from entering the protective device.

[0019] Preferably, the second sealing ring is used to prevent the leakage of lubricating grease in the oil storage cavity. As the innermost sealing element, it ensures the sealing of the internal lubrication system and avoids grease loss and environmental pollution.

[0020] Preferably, the groove is used to store grease from the oil reservoir and to lubricate the surface of the threaded rod during its movement, ensuring that a protective oil film is always attached to the surface of the threaded rod during reciprocating motion.

[0021] This utility model has the following beneficial effects:

[0022] 1. This utility model solves the problem of external corrosive impurities, dust and moisture invading the gate valve in the prior art by setting a sealing shell and sequentially setting a sealing ring one, a wedge-shaped polytetrafluoroethylene packing ring group and a sealing ring two on the inner wall of the sealing shell from top to bottom, thus achieving the effect of multi-level blocking, high-efficiency protection and preventing the intrusion of external impurities.

[0023] 2. This utility model solves the problems of insufficient lubrication and wear of moving parts such as threaded rods in the prior art, and electrochemical corrosion caused by direct exposure of metal surfaces to corrosive media, by setting an oil storage shell and setting a flexible isolation sleeve inside the oil storage shell, and opening grooves on the inner wall of the flexible isolation sleeve. It achieves the effects of continuous lubrication of threaded rods, forming an isolation oil film on the surface of threaded rods, and preventing electrochemical corrosion.

[0024] 3. This utility model, through the synergistic effect of the sealing shell and the oil storage shell, and by setting up an oil inlet and an oil outlet, solves the problems of single protective structure, grease leakage and difficulty in replacement in the prior art, and achieves the effects of dual protection of external blocking and internal isolation, reliable sealing, cyclical grease replacement, and extension of the overall service life of the gate valve. Attached Figure Description

[0025] Figure 1 This is a perspective view of a corrosion-resistant gate valve protection device proposed in this utility model;

[0026] Figure 2 This is a front view of a corrosion-resistant gate valve protection device proposed in this utility model;

[0027] Figure 3 This is a cross-sectional view of a partial structure in an anti-corrosion gate valve protection device proposed in this utility model;

[0028] Figure 4 This is a partial structural diagram of the anti-corrosion gate valve protection device proposed in this utility model.

[0029] Legend:

[0030] 1. Gate valve seat; 2. Gate valve cover; 3. Handle; 4. Threaded rod; 5. Sealing shell; 6. Sealing ring one; 7. Wedge-shaped PTFE packing ring assembly; 8. Sealing ring two; 9. Oil reservoir; 10. Oil inlet; 11. Oil outlet; 12. Oil reservoir cavity; 13. Flexible isolation sleeve; 14. Groove. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0032] Example:

[0033] Please refer to Figures 1 to 4 This utility model provides a corrosion-resistant gate valve protection device, which aims to solve the problem in the prior art that the operating parts of the gate valve are easily invaded by impurities and lubrication failure in corrosive environments, leading to wear and electrochemical corrosion of the parts.

[0034] like Figure 1 and Figure 2 As shown, a corrosion-resistant gate valve protection device includes a gate valve seat 1; a gate valve cover 2 fixedly connected to the top of the gate valve seat 1; a threaded rod 4 threaded through the gate valve seat 1 and the gate valve cover 2; a handle 3 fixedly connected to the top of the outer wall of the threaded rod 4 for driving the threaded rod 4 to move; it also includes a sealing shell 5 and an oil reservoir 9; the sealing shell 5 is rotatably connected to the bottom of the handle 3; the oil reservoir 9 is fixedly connected to the bottom of the sealing shell 5, and the bottom of the oil reservoir 9 is fixedly connected to the top of the gate valve cover 2; the threaded rod 4 is sequentially inserted into the sealing shell 5 and the oil reservoir 9.

[0035] Please refer to Figure 3 and Figure 4 The inner wall of the sealing shell 5 is provided with a sealing ring 6, a wedge-shaped PTFE packing ring 7, and a sealing ring 8. Specifically, the sealing ring 6 is interference-fitted to the top of the inner wall of the sealing shell 5 to prevent impurities from entering the interior of the sealing shell 5; the wedge-shaped PTFE packing ring 7 is interference-fitted to the middle of the inner wall of the sealing shell 5, and its wedge-shaped structure is used to fill the impurities that enter the sealing shell 5; the sealing ring 8 is interference-fitted to the bottom of the inner wall of the sealing shell 5 to prevent the lubricating grease in the oil storage cavity 12 from leaking. The sealing ring 6, the wedge-shaped PTFE packing ring 7, and the sealing ring 8 are arranged sequentially from top to bottom, together forming a multi-level sealing defense line.

[0036] The oil reservoir 9 has an oil storage chamber 12 inside, and a flexible isolation sleeve 13 is fixedly connected inside the oil storage chamber 12. The inner wall of the flexible isolation sleeve 13 has multiple grooves 14. The grooves 14 are used to store grease from the oil storage chamber 12 and to lubricate the surface of the threaded rod 4 during its movement. An oil inlet 10 is fixedly connected to the top front side of the oil reservoir 9, and an oil outlet 11 is fixedly connected to the bottom front side of the oil reservoir 9. The oil inlet 10 and the oil outlet 11 are used for the filling and circulation of lubricating grease.

[0037] In the assembled state, the threaded rod 4 is sequentially inserted into the sealing shell 5, sealing ring 1 6, wedge-shaped PTFE packing ring 7, sealing ring 2 8, oil reservoir 9, and flexible isolation sleeve 13. During the movement of the threaded rod 4, the flexible isolation sleeve 13 creates a gap with the inner wall of the oil reservoir 9, allowing the grease in the oil reservoir 12 to enter the inner wall of the oil reservoir 9. Through the oil storage effect of the groove 14, an isolation oil film is formed on the surface of the threaded rod 4. This structural combination ensures that the threaded rod 4 is continuously lubricated and isolated from corrosive media during movement.

[0038] Please refer to Figure 3 and Figure 4 The inner wall of the sealing shell 5 is provided with a sealing ring 6, a wedge-shaped PTFE packing ring 7, and a sealing ring 8. Specifically, the sealing ring 6 is interference-fitted to the top of the inner wall of the sealing shell 5 to prevent impurities from entering the interior of the sealing shell 5; the wedge-shaped PTFE packing ring 7 is interference-fitted to the middle of the inner wall of the sealing shell 5, and its wedge-shaped structure is used to fill the impurities that enter the sealing shell 5; the sealing ring 8 is interference-fitted to the bottom of the inner wall of the sealing shell 5 to prevent the lubricating grease in the oil storage cavity 12 from leaking. The sealing ring 6, the wedge-shaped PTFE packing ring 7, and the sealing ring 8 are arranged sequentially from top to bottom, together forming a multi-level sealing defense line.

[0039] The oil reservoir 9 has an oil storage chamber 12 inside, and a flexible isolation sleeve 13 is fixedly connected inside the oil storage chamber 12. The inner wall of the flexible isolation sleeve 13 has multiple grooves 14. The grooves 14 are used to store grease from the oil storage chamber 12 and to lubricate the surface of the threaded rod 4 during its movement. An oil inlet 10 is fixedly connected to the top front side of the oil reservoir 9, and an oil outlet 11 is fixedly connected to the bottom front side of the oil reservoir 9. The oil inlet 10 and the oil outlet 11 are used for the filling and circulation of lubricating grease.

[0040] In the assembled state, the threaded rod 4 is sequentially inserted into the sealing shell 5, sealing ring 1 6, wedge-shaped PTFE packing ring 7, sealing ring 2 8, oil reservoir 9, and flexible isolation sleeve 13. During the movement of the threaded rod 4, the flexible isolation sleeve 13 creates a gap with the inner wall of the oil reservoir 9, allowing the grease in the oil reservoir 12 to enter the inner wall of the oil reservoir 9. Through the oil storage effect of the groove 14, an isolation oil film is formed on the surface of the threaded rod 4. This structural combination ensures that the threaded rod 4 is continuously lubricated and isolated from corrosive media during movement.

[0041] Working principle: When it is necessary to open or close the gate valve, the operator turns the handle 3. Since the handle 3 is fixedly connected to the top of the outer wall of the threaded rod 4, and the threaded rod 4 is threaded through the gate valve seat 1 and the gate valve cover 2, the rotation of the handle 3 will drive the threaded rod 4 to move up and down reciprocally, thereby realizing the opening or closing of the gate valve.

[0042] During the movement of the threaded rod 4, corrosive impurities in the external environment are first blocked by the sealing shell 5, and are initially intercepted by the sealing ring 6 located at the top of the inner wall of the sealing shell 5; when the residual impurities attempt to penetrate further, they will encounter the wedge-shaped polytetrafluoroethylene packing ring group 7, which fills the impurities with its wedge-shaped structure, achieving secondary blocking; at the same time, the sealing ring 8 at the bottom of the inner wall of the sealing shell 5 effectively prevents the lubricating grease inside the oil reservoir 9 from leaking outward. The sealing ring 6, the wedge-shaped polytetrafluoroethylene packing ring group 7, and the sealing ring 8 together form a multi-level protection structure from top to bottom;

[0043] While providing external protection, internal corrosion protection is achieved through the oil reservoir 9. The oil reservoir 9 contains an oil chamber 12 that stores lubricating grease. The grease can be added through the oil inlet 10 and discharged and replaced through the oil outlet 11. When the threaded rod 4 moves, the flexible isolation sleeve 13, which is fixedly connected to the oil chamber 12, creates a gap with the inner wall of the oil reservoir 9, allowing the grease in the oil chamber 12 to enter the inner wall of the oil reservoir 9. Multiple grooves 14 on the inner wall of the flexible isolation sleeve 13 store this grease and continuously coat the surface of the threaded rod 4 during its up-and-down movement, forming an isolation oil film. The oil film not only reduces the friction of the threaded rod 4 but, more importantly, physically isolates the metal surface of the threaded rod 4 from potentially intrusive corrosive media such as moisture, effectively preventing electrochemical corrosion.

Claims

1. A corrosion-resistant gate valve protection device, comprising: Gate valve seat (1); The gate valve cover (2) is fixedly connected to the top of the gate valve seat (1); The threaded rod (4) is threaded through the gate valve seat (1) and the gate valve cover (2); The handle (3) is fixedly connected to the top of the outer wall of the threaded rod (4); Its characteristic is that it further includes a sealing shell (5) and an oil storage shell (9); The sealing shell (5) is rotatably connected to the bottom of the handle (3), the oil storage shell (9) is fixedly connected to the bottom of the sealing shell (5), and the bottom of the oil storage shell (9) is fixedly connected to the top of the gate valve cover (2). The inner wall of the sealing shell (5) is provided with a sealing ring one (6), a wedge-shaped polytetrafluoroethylene packing ring group (7) and a sealing ring two (8). The oil storage shell (9) has an oil storage cavity (12) inside, and a flexible isolation sleeve (13) is fixedly connected inside the oil storage cavity (12). The inner wall of the flexible isolation sleeve (13) is provided with multiple grooves (14). The threaded rod (4) is sequentially inserted into the sealing shell (5), the first sealing ring (6), the wedge-shaped polytetrafluoroethylene packing ring group (7), the second sealing ring (8), the oil reservoir (9), and the flexible isolation sleeve (13).

2. The anti-corrosion gate valve protection device according to claim 1, characterized in that, The sealing ring one (6), the wedge-shaped polytetrafluoroethylene packing ring group (7) and the sealing ring two (8) are sequentially interference-fitted into the inner wall of the sealing shell (5) from top to bottom.

3. The anti-corrosion gate valve protection device according to claim 1, characterized in that, An oil inlet (10) is fixedly connected to the top front side of the oil storage shell (9), and an oil outlet (11) is fixedly connected to the bottom front side of the oil storage shell (9).

4. The anti-corrosion gate valve protection device according to claim 1, characterized in that, During the movement of the threaded rod (4), the flexible isolation sleeve (13) creates a gap with the inner wall of the oil storage shell (9) so that the grease in the oil storage cavity (12) can enter the inner wall of the oil storage shell (9).

5. The anti-corrosion gate valve protection device according to claim 1, characterized in that, The wedge-shaped polytetrafluoroethylene packing ring assembly (7) is used to fill impurities entering the sealing shell (5) by virtue of its wedge-shaped structure.

6. The anti-corrosion gate valve protection device according to claim 1, characterized in that, The sealing ring (6) is used to prevent impurities from entering the interior of the sealing shell (5).

7. The anti-corrosion gate valve protection device according to claim 1, characterized in that, The sealing ring 2 (8) is used to prevent the leakage of lubricating grease in the oil storage cavity (12).

8. The anti-corrosion gate valve protection device according to claim 1, characterized in that, The groove (14) is used to store grease from the oil reservoir (12) and to lubricate the surface of the threaded rod (4) during its movement.

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