Anti-wear device for valve

Abstract

The present invention belongs to the field of valve technology, and provides an anti-wear device for valves, including a valve body, a valve stem and a valve cover, the valve cover and the valve body are fixedly connected by screws, the valve stem and the valve cover are coaxially arranged and the valve stem passes through the valve cover, a slot is provided in the valve cover, an anti-wear sleeve is slidably installed in the slot, the valve stem and the anti-wear sleeve are in sliding contact, a fixing plate for fixing the anti-wear sleeve is fixedly installed at the bottom of the valve cover by screws, a collecting groove of an annular structure is fixedly installed on the inner side of the fixing plate, and the inner diameter of the collecting area of ​​the collecting groove is smaller than the inner diameter of the anti-wear sleeve. Compared with the prior art, the beneficial effects of the present invention are as follows: when the position of the valve stem is within a small range when it moves up and down, it is ensured that the sealing surface of the valve stem is only in contact with the anti-wear sleeve, thereby reducing the contact area of ​​the valve stem with other components when the valve stem moves, reducing the wear on the valve stem, and at the same time, a lubricating layer can be provided in the anti-wear sleeve to further reduce the wear of the valve stem.

Description

Technical Field

[0001] The invention belongs to the technical field of valves, and in particular relates to an anti-wear device for valves. Background Art

[0002] Valves are widely used in industrial production and daily life. As an important component of the valve, the valve stem plays a key role in the opening and closing process of the valve.

[0003] However, in actual use, the valve stem is generally installed in the through hole in the valve cover, and the valve stem often rubs against the inner wall of the through hole in the valve cover. Especially in the case of frequent operation, the valve stem is prone to wear, and the powder impurities generated by wear remain in the gap between the valve stem and the inner wall of the valve cover, which will further accelerate the wear of the valve stem during subsequent use, thereby affecting the sealing and service life of the valve. Summary of the invention

[0004] The object of the present invention is to provide an anti-wear device for a valve, aiming to solve the technical problem in the prior art that friction between a valve stem and an inner wall of a valve cover affects the sealing performance and service life of the valve.

[0005] The present invention is implemented as follows: a wear-proof device for a valve comprises a valve body, a valve stem and a valve cover, the valve cover and the valve body are fixedly connected by screws, the valve stem and the valve cover are coaxially arranged and the valve stem passes through the valve cover, a slot is provided in the valve cover, an anti-wear sleeve is slidably installed in the slot, the valve stem is in sliding contact with the anti-wear sleeve, a fixing plate for fixing the anti-wear sleeve is fixedly installed on the bottom of the valve cover by screws, a collecting groove with an annular structure is fixedly installed on the inner side of the fixing plate, and the inner diameter of the collecting area of ​​the collecting groove is smaller than the inner diameter of the anti-wear sleeve.

[0006] Further technical solution: the anti-wear sleeve is coaxially arranged with the valve stem, the inner diameter of the anti-wear sleeve is smaller than the inner diameter of the through hole inside the valve cover, and a gap is provided between the inner side surface of the anti-wear sleeve and the outer side surface of the valve stem.

[0007] Further technical solution: the fixing plate is an annular structure, and the inner diameter value of the fixing plate is between the inner and outer diameter values ​​of the anti-wear sleeve.

[0008] Further technical solution: an installation groove is opened in the valve cover, a piston cylinder is fixedly installed in the installation groove, a piston plate is slidably installed in the piston cylinder, the piston plate is connected to the valve stem, a drain pipe and a suction pipe are connected to the bottom of the piston cylinder, the outlet end of the drain pipe is located in the through hole of the valve cover and a one-way valve is arranged on the drain pipe, and the suction pipe is connected to the collecting tank.

[0009] Further technical solution: a lifting rod is fixedly installed on the piston plate, the lifting rod extends out of the piston cylinder and a cross plate is fixedly installed on one end of the lifting rod away from the piston plate, a limit plate is slidably installed on the cross plate, a second elastic part is fixedly installed on the cross plate, the second elastic part is fixedly connected to the limit plate, and a limit groove is opened on the valve stem for the limit plate to extend into.

[0010] Further technical solution: A second channel connected to the liquid extraction tube is opened on the valve cover, the second channel is aligned and connected with the first channel opened on the fixed plate, the end of the first channel away from the second channel is connected to a reflux pipe, the end of the reflux pipe away from the first channel is fixedly connected to the collecting tank, and a one-way valve is arranged on the reflux pipe.

[0011] Further technical solution: A filter plate with an annular structure is fixedly installed in the collecting tank, and guide plates are fixedly installed on both sides of the filter plate, and the guide plates are fixedly connected to the side walls of the collecting tank.

[0012] Further technical solution: Multiple groups of evenly distributed support plates are fixedly installed on the side walls of the collecting trough, vertical plates are slidably installed on the support plates, a pressure plate with an annular structure is fixedly installed on one end of the vertical plate close to the filter plate, a bracket is fixedly installed on the support plate, a connecting plate is slidably installed on the bracket, the connecting plate is fixedly connected to the vertical plate, a first elastic member is fixedly installed on the support plate, and the end of the first elastic member away from the support plate is fixedly connected to the connecting plate.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. The valve stem is restricted by installing the anti-wear sleeve. Since the inner diameter of the anti-wear sleeve is smaller than the inner diameter of the through hole inside the valve cover, a gap is set between the inner side of the anti-wear sleeve and the outer side of the valve stem. When the position of the valve stem is within a small range when it moves up and down, it is ensured that the sealing surface of the valve stem is only in contact with the anti-wear sleeve, thereby reducing the contact area with other components when the valve stem moves, reducing the wear on the valve stem, and at the same time, a lubricating layer can be set in the anti-wear sleeve to further reduce the wear of the valve stem.

[0014] 2. When the valve stem moves downward, the valve stem drives the piston plate to move downward through the cross plate and the lifting rod, so that the lubricating oil in the piston cylinder is discharged into the through hole of the valve stem through the drain pipe. At this time, the lubricating oil will flow downward along the gap between the valve stem and the anti-wear sleeve under the action of gravity. At the same time, due to the viscosity of the lubricating oil, a large amount of lubricating oil will be driven downward during the downward movement of the valve stem, thereby ensuring that new lubricating oil continuously participates in the friction between the valve stem and the anti-wear sleeve, further reducing the friction between the valve stem and the anti-wear sleeve, and improving the protection effect of the valve stem.

[0015] 3. During the downward movement of the valve stem, the lubricating oil between the valve stem and the anti-wear sleeve will move from top to bottom. The upper lubricating oil will push the lower lubricating oil to move downward and flow out of the gap between the valve stem and the anti-wear sleeve. The lubricating oil flowing out of the gap falls into the collection tank. At the same time, the flowing lubricating oil will carry impurities generated by wear and flow out of the gap, thereby reducing the amount of impurities between the valve stem and the anti-wear sleeve, further reducing the friction between the valve stem and the anti-wear sleeve, and improving the protection effect of the valve stem.

[0016] 4. When the valve stem falls to the set height, the stepped lower end of the valve stem contacts the top of the vertical plate. At this time, the valve stem will push the pressure plate downward through the vertical plate and compress the elastic part, and the lubricating oil on the filter plate will be pressed down by the pressure plate, thereby accelerating the filtration speed of the lubricating oil, improving the filtration effect of the lubricating oil, ensuring that a large amount of lubricating oil can flow back into the piston cylinder, ensuring that sufficient lubricating oil can be obtained each time the valve stem descends, and further improving the protection effect of the valve stem. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2 It is a schematic diagram of the explosion structure of the valve cover in the present invention.

[0019] Figure 3 It is a schematic diagram of the cross-sectional structure of the present invention.

[0020] Figure 4 for Figure 3 A magnified schematic diagram of the A1 region in the middle.

[0021] Figure 5 for Figure 3 A magnified schematic diagram of the A2 region in the middle.

[0022] Figure 6 It is a schematic diagram of the cross-sectional structure of the valve cover in the present invention.

[0023] Figure 7 It is a schematic diagram of the cross-sectional structure of the piston cylinder in the present invention.

[0024] Figure 8 It is a schematic diagram of the cross-sectional structure of the fixing plate in the present invention.

[0025] Fig. 9 for Figure 8 A magnified schematic diagram of the A3 region in the middle.

[0026] Fig.10 It is a structural schematic diagram of the support plate in the present invention.

[0027] In the attached drawings: 1. valve body; 2. valve stem; 3. valve cover; 4. anti-wear sleeve; 5. slot; 6. fixing plate; 7. collecting tank; 8. filter plate; 9. guide plate; 10. support plate; 11. vertical plate; 12. pressure plate; 13. first elastic member; 14. bracket; 15. connecting plate; 16. limiting slot; 17. reflux pipe; 18. first channel; 19. second channel; 20. suction pipe; 21. installation slot; 22. limiting plate; 23. piston cylinder; 24. discharge pipe; 25. lifting rod; 26. piston plate; 27. second elastic member; 28. horizontal plate. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0029] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0030] like Figure 1-Figure 3 As shown, an anti-wear device for a valve provided by the present invention comprises a valve body 1, a valve stem 2 and a valve cover 3, the valve cover 3 is fixedly connected to the valve body 1 by screws, the valve stem 2 and the valve cover 3 are coaxially arranged and the valve stem 2 passes through the valve cover 3, a slot 5 is provided in the valve cover 3, an anti-wear sleeve 4 is slidably installed in the slot 5, the valve stem 2 is in sliding contact with the anti-wear sleeve 4, the anti-wear sleeve 4 is coaxially arranged with the valve stem 2, the inner diameter of the anti-wear sleeve 4 is smaller than the inner diameter of the internal through hole of the valve cover 3, a gap is provided between the inner side surface of the anti-wear sleeve 4 and the outer side surface of the valve stem 2, a fixing plate 6 for fixing the anti-wear sleeve 4 is fixedly installed at the bottom of the valve cover 3 by screws, the fixing plate 6 is an annular structure, the inner diameter value of the fixing plate 6 is between the inner and outer diameter values ​​of the anti-wear sleeve 4, a collecting groove 7 of an annular structure is fixedly installed on the inner side surface of the fixing plate 6, and the inner diameter of the collecting area of ​​the collecting groove 7 is smaller than the inner diameter of the anti-wear sleeve 4.

[0031] In actual application of this embodiment, the anti-wear sleeve 4 is installed in the groove 5, and then the fixing plate 6 is installed on the valve cover 3 by means of fixing screws. The anti-wear sleeve 4 is pressed and fixed in the groove 5 by means of the fixing plate 6, and the valve stem 2 passes through the anti-wear sleeve 4. Then, the valve cover 3 is installed on the valve body 1 by means of fixing screws. Since the inner diameter of the anti-wear sleeve 4 is smaller than the inner diameter of the through hole inside the valve cover 3, a gap is provided between the inner side surface of the anti-wear sleeve 4 and the outer side surface of the valve stem 2. When the position of the valve stem 2 during up and down movement is within a small range, it is ensured that the sealing surface of the valve stem 2 is in contact with the anti-wear sleeve 4 only, thereby reducing the contact area of ​​the valve stem 2 with other components during movement, reducing the wear on the valve stem 2, and at the same time, a lubricating layer can be provided in the anti-wear sleeve 4 to further reduce the wear on the valve stem 2.

[0032] like Figure 1-Figure 10As shown, an anti-wear device for a valve provided by the present invention, wherein a mounting groove 21 is opened in the valve cover 3, a piston cylinder 23 is fixedly installed in the mounting groove 21, a piston plate 26 is slidably installed in the piston cylinder 23, the piston plate 26 is connected to the valve stem 2, a drain pipe 24 and a liquid extraction pipe 20 are connected to the bottom of the piston cylinder 23, the outlet end of the drain pipe 24 is located in the through hole of the valve cover 3 and a one-way valve is arranged on the drain pipe 24, and the liquid extraction pipe 20 is connected to the collecting tank 7.

[0033] Specifically, a lifting rod 25 is fixedly installed on the piston plate 26, the lifting rod 25 extends out of the piston cylinder 23 and a cross plate 28 is fixedly installed on one end of the lifting rod 25 away from the piston plate 26, a limit plate 22 is slidably installed on the cross plate 28, a second elastic member 27 is fixedly installed on the cross plate 28, the second elastic member 27 is fixedly connected to the limit plate 22, and a limit groove 16 is opened on the valve stem 2 for the limit plate 22 to extend into.

[0034] Specifically, the valve cover 3 is provided with a second channel 19 connected to the liquid extraction tube 20, the second channel 19 is aligned and connected with the first channel 18 provided on the fixed plate 6, the end of the first channel 18 away from the second channel 19 is connected with the reflux pipe 17, the end of the reflux pipe 17 away from the first channel 18 is fixedly connected to the collecting tank 7, and a one-way valve is provided on the reflux pipe 17.

[0035] In actual application of this embodiment, during installation, the limiting plate 22 is first pushed to move and compress the second elastic member 27, so that the limiting plate 22 enters the installation groove 21, and then the valve stem 2 is inserted into the valve cover 3. After the valve stem 2 moves to the set position, the limiting plate 22 enters the limiting groove 16 under the action of the second elastic member 27. At this time, the movement of the valve stem 2 can drive the piston plate 26 to move. In the initial state, the piston cylinder 23, the first channel 18, the second channel 19, and the return pipe 17 are all filled with lubricating oil. When the valve stem 2 moves downward, the valve stem 2 drives the piston plate 26 to move downward through the limiting plate 22 and the lifting rod 25, so that the lubricating oil in the piston cylinder 23 is discharged into the through hole where the valve stem 2 moves through the drain pipe 24. At this time, the lubricating oil will flow downward along the gap between the valve stem 2 and the anti-wear sleeve 4 under the action of gravity. Flow, and at the same time, due to the viscosity of the lubricating oil, a large amount of lubricating oil will be driven to move downward during the downward movement of the valve stem 2, thereby ensuring that new lubricating oil continuously participates in the friction between the valve stem 2 and the anti-wear sleeve 4, further reducing the friction between the valve stem 2 and the anti-wear sleeve 4, and improving the protection effect of the valve stem 2. In the process of the downward movement of the valve stem 2, the lubricating oil between the valve stem 2 and the anti-wear sleeve 4 will move from top to bottom, and the upper lubricating oil will push the lower lubricating oil to move downward and flow out of the gap between the valve stem 2 and the anti-wear sleeve 4. The lubricating oil flowing out of the gap falls into the collecting tank 7. At the same time, the lubricating oil flowing out will carry impurities generated by wear and flow out of the gap, thereby reducing the number of impurities between the valve stem 2 and the anti-wear sleeve 4, further reducing the friction between the valve stem 2 and the anti-wear sleeve 4, and improving the protection effect of the valve stem 2; When the valve stem 2 moves upward, the piston plate 26 moves upward. At this time, the lubricating oil in the first channel 18, the second channel 19, and the return pipe 17 will be drawn into the piston cylinder 23, and the lubricating oil collected in the collecting tank 7 will also be added to the return pipe 17, thereby realizing the continuous circulation of the lubricating oil.

[0036] like Figure 1-Figure 10 As shown, an anti-wear device for valves provided by the present invention is provided. A filter plate 8 with an annular structure is fixedly installed in the collecting tank 7. Guide plates 9 are fixedly installed on both sides of the filter plate 8. The guide plates 9 are fixedly connected to the side walls of the collecting tank 7.

[0037] Specifically, a plurality of groups of evenly distributed support plates 10 are fixedly installed on the side walls of the collecting trough 7, a vertical plate 11 is slidably installed on the support plate 10, a pressure plate 12 with an annular structure is fixedly installed on one end of the vertical plate 11 close to the filter plate 8, a bracket 14 is fixedly installed on the support plate 10, a connecting plate 15 is slidably installed on the bracket 14, the connecting plate 15 is fixedly connected to the vertical plate 11, a first elastic member 13 is fixedly installed on the support plate 10, and one end of the first elastic member 13 away from the support plate 10 is fixedly connected to the connecting plate 15.

[0038] In actual application of this embodiment, the lubricating oil carrying impurities falls into the collecting tank 7 and is filtered through the filter plate 8. Under the action of the guide plate 9, the lubricating oil is distributed in the coverage area of ​​the pressure plate 12. When the valve stem 2 falls to the set height, the stepped lower end of the valve stem 2 contacts the top of the vertical plate 11. At this time, the valve stem 2 will push the pressure plate 12 to move downward through the vertical plate 11 and compress the first elastic member 13. The lubricating oil on the filter plate 8 is pressed down by the pressure plate 12, thereby accelerating the filtration speed of the lubricating oil, improving the filtration effect of the lubricating oil, ensuring that a large amount of lubricating oil can flow back into the piston cylinder 23, ensuring that the valve stem 2 can obtain sufficient lubricating oil each time it descends subsequently, and further improving the protection effect of the valve stem 2. When the valve stem 2 moves upward, the pressure plate 12 is reset under the action of the first elastic member 13.

[0039] In an example of the present invention, the first elastic member 13 is a spring, and of course, it can also be other elastic components such as an elastic ball, and the spring compression provides a resetting thrust for the pressure plate 12 .

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0041] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A wear-proof device for a valve, comprising a valve body (1), a valve stem (2) and a valve cover (3), wherein the valve cover (3) is fixedly connected to the valve body (1) by screws, the valve stem (2) and the valve cover (3) are coaxially arranged and the valve stem (2) passes through the valve cover (3), and is characterized in that: The valve cover (3) is provided with a slot (5), an anti-wear sleeve (4) is slidably mounted in the slot (5), the valve stem (2) is in sliding contact with the anti-wear sleeve (4), a fixing plate (6) for fixing the anti-wear sleeve (4) is fixedly mounted on the bottom of the valve cover (3) by screws, an annular collecting groove (7) is fixedly mounted on the inner side of the fixing plate (6), and the inner diameter of the collecting area of ​​the collecting groove (7) is smaller than the inner diameter of the anti-wear sleeve (4).

2. A valve anti-wear device according to claim 1, characterized in that: The anti-wear sleeve (4) is coaxially arranged with the valve stem (2); the inner diameter of the anti-wear sleeve (4) is smaller than the inner diameter of the internal through hole of the valve cover (3); and a gap is provided between the inner side surface of the anti-wear sleeve (4) and the outer side surface of the valve stem (2).

3. The anti-wear device for valve according to claim 1, characterized in that: The fixing plate (6) is an annular structure, and the inner diameter value of the fixing plate (6) is between the inner and outer diameter values ​​of the anti-wear sleeve (4).

4. The anti-wear device for valve according to claim 1, characterized in that: The valve cover (3) is provided with a mounting groove (21), a piston cylinder (23) is fixedly mounted in the mounting groove (21), a piston plate (26) is slidably mounted in the piston cylinder (23), the piston plate (26) is connected to the valve stem (2), a liquid discharge pipe (24) and a liquid extraction pipe (20) are connected to the bottom of the piston cylinder (23), an outlet end of the liquid discharge pipe (24) is located in a through hole of the valve cover (3) and a one-way valve is provided on the liquid discharge pipe (24), and the liquid extraction pipe (20) is connected to the collecting tank (7).

5. The anti-wear device for valve according to claim 4, characterized in that: A lifting rod (25) is fixedly mounted on the piston plate (26). The lifting rod (25) extends out of the piston cylinder (23) and a transverse plate (28) is fixedly mounted on one end of the lifting rod (25) away from the piston plate (26). A limit plate (22) is slidably mounted on the transverse plate (28). A second elastic member (27) is fixedly mounted on the transverse plate (28). The second elastic member (27) is fixedly connected to the limit plate (22). A limit groove (16) is provided on the valve stem (2) for the limit plate (22) to extend into.

6. The anti-wear device for valve according to claim 5, characterized in that: The valve cover (3) is provided with a second channel (19) connected to the liquid extraction pipe (20); the second channel (19) is aligned and connected to a first channel (18) provided on the fixed plate (6); an end of the first channel (18) away from the second channel (19) is connected to a return pipe (17); an end of the return pipe (17) away from the first channel (18) is fixedly connected to the collection tank (7); and a one-way valve is provided on the return pipe (17).

7. The anti-wear device for valve according to claim 1, characterized in that: A filter plate (8) with an annular structure is fixedly installed in the collecting tank (7), and guide plates (9) are fixedly installed on both sides of the filter plate (8), and the guide plates (9) are fixedly connected to the side walls of the collecting tank (7).

8. The anti-wear device for valve according to claim 7, characterized in that: A plurality of groups of evenly distributed support plates (10) are fixedly mounted on the side wall of the collecting tank (7), a vertical plate (11) is slidably mounted on the support plate (10), a pressing plate (12) of an annular structure is fixedly mounted on one end of the vertical plate (11) close to the filter plate (8), a bracket (14) is fixedly mounted on the support plate (10), a connecting plate (15) is slidably mounted on the bracket (14), the connecting plate (15) is fixedly connected to the vertical plate (11), a first elastic member (13) is fixedly mounted on the support plate (10), and one end of the first elastic member (13) away from the support plate (10) is fixedly connected to the connecting plate (15).

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