Automatic lubricating device for packing of pneumatic lift valve

Abstract

The utility model discloses an automatic lubricating device for packing of a pneumatic lift valve. The automatic lubricating device comprises a valve body, a valve rod, the packing, a packing gland, an oil storage shell and a sealing assembly. The vertically-arranged valve rod coaxially penetrates through the valve body, the position, close to the outer side, of the joint of the vertically-arranged valve rod and the valve body is further coaxially sleeved with a packing matched with the vertically-arranged valve rod, and the joint of the vertically-arranged valve rod and the valve body is sealed through the packing. The outer side of the valve body is arranged upwards, the valve rod is coaxially sleeved with a packing gland, an oil storage shell and a sealing assembly in sequence from bottom to top relative to the outer side of the valve body, the lower end of the oil storage shell is fixed to the valve body in a threaded connection mode, and packing is fixed in an abutting mode by pressing the packing gland; the sealing assembly seals the upper end of the oil storage shell, and the packing is automatically supplied through lubricating grease in the oil storage shell. According to the pneumatic lifting valve, the effect of moistening the packing is achieved, the maintenance frequency is reduced, and the service life of the pneumatic lifting valve is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of pneumatic lift valve technology, specifically to an automatic lubrication device for the packing of a pneumatic lift valve. Background Technology

[0002] A pneumatic lifting valve is a type of valve that uses compressed air as a power source. Its main function is to lift and convey solid materials such as powder, granules, and small lumps.

[0003] Existing pneumatic lift valves typically use oil-soaked packing as the sealing component between the valve stem and the valve body. However, in actual use, due to environmental and temperature factors, the grease in the packing easily evaporates, causing the packing to harden and lose its sealing effect. This necessitates frequent lubrication of the packing. This process is not only time-consuming and labor-intensive, but inadequate maintenance can also significantly shorten the packing's lifespan, easily leading to leakage of the valve's internal medium through the packing. In such cases, the packing needs to be replaced, resulting in further material and labor losses. Therefore, these problems urgently need to be addressed. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide an automatic lubrication device for the packing of a pneumatic lift valve. It has a simple structure and is easy to install. It replenishes the oil in the packing by storing oil, so as to achieve the effect of moisturizing the packing and maintaining its good sealing effect. This reduces the number of maintenance and increases the service life of the pneumatic lift valve.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: The innovative feature of this invention is that it includes a valve body, a valve stem, packing, a packing gland, an oil reservoir, and a sealing assembly. The vertically arranged valve stem coaxially passes through the valve body, and a matching packing is coaxially fitted onto the outer side of the joint between the two, sealing the joint between the valve stem and the valve body. The outer side of the valve body faces upwards, and a packing gland, an oil reservoir, and a sealing assembly are coaxially fitted onto the valve stem from bottom to top relative to the outer side of the valve body. The lower end of the oil reservoir is screwed to the valve body, and the packing is pressed and fixed by the packing gland. The sealing assembly seals the upper end of the oil reservoir and automatically replenishes the packing with lubricating grease from within the oil reservoir.

[0006] Preferably, a mounting groove matching the packing is also coaxially and perpendicularly embedded on the outer surface of the valve body relative to its joint with the valve stem, and the packing is coaxially sleeved on the valve stem relative to the mounting groove, and the joint between the valve stem and the valve body is sealed by the packing.

[0007] Preferably, the packing gland has a circular ring structure with a T-shaped cross-section; the packing gland is coaxially sleeved on the valve stem, and its small-diameter end face is in close contact with the packing, while its large-diameter end is located outside the valve body; the outer diameter of the small-diameter end of the packing gland matches the mounting groove, and the sum of its small-diameter end length and the packing thickness must be greater than the opening depth of the mounting groove, thereby ensuring that the large-diameter end of the packing gland is located outside the valve body.

[0008] Preferably, the inner diameter of the packing gland is larger than the diameter of the valve stem, and the gap between it and the valve stem must ensure that the lubricating grease in the oil reservoir can be replenished to the packing through the packing gland.

[0009] Preferably, the oil storage shell is integrally formed from an upper connecting plate, an upper cylinder, a lower cylinder, and a lower connecting plate; the upper cylinder is a hollow frustum-shaped structure, and its large-diameter end is located on the side away from the valve body; the lower cylinder is a hollow cylindrical structure, and its inner and outer diameters are consistent with the inner and outer diameters of the small-diameter end of the upper cylinder, and are integrally formed coaxially with the small-diameter end of the upper cylinder; both the upper and lower connecting plates are annular, and the outer diameter of the upper connecting plate is consistent with the outer diameter of the large-diameter end of the upper cylinder, and is integrally formed coaxially with the end face of the large-diameter end of the upper cylinder; the outer diameter of the lower connecting plate is consistent with the outer diameter of the large-diameter end of the packing gland, and its inner diameter is consistent with the inner diameter of the lower cylinder, and is integrally formed coaxially with the lower end of the lower cylinder.

[0010] Preferably, the sealing assembly includes a clamping flange, a dustproof rubber gasket, and fastening bolts II; the inner diameter of the upper connecting plate is smaller than the large-diameter inner diameter of the upper cylinder, and a matching dustproof rubber gasket is coaxially fitted on its upper surface. The dustproof rubber gasket is coaxially sleeved on the valve stem and does not interfere with the movement of the valve stem, and provides dust protection for the inside of the oil storage shell; a matching clamping flange is coaxially sleeved on the valve stem relative to the outer side of the dustproof rubber gasket. The clamping flange has an annular structure, and its inner and outer diameters correspond to the inner and outer diameters of the upper connecting plate, and it is coaxially fitted with the dustproof rubber gasket; several fastening bolts II are evenly distributed and vertically spaced along the circumference of the upper surface of the clamping flange, and the clamping flange is screwed and fixed to the upper connecting plate by the fastening bolts II, thereby fixing the dustproof rubber gasket.

[0011] Preferably, the inner diameter of the lower connecting plate matches the diameter of the valve stem, and the gap between them is less than 5mm, ensuring that the lubricating grease in the oil reservoir is supplied to the packing through the gap between the lower connecting plate and the valve stem.

[0012] Preferably, the lower surface of the lower connecting plate is coaxially fitted with the large-diameter end face of the packing gland, and an annular lower sealing gasket is coaxially sleeved between them; several fastening bolts I are evenly distributed vertically at intervals along the circumference of the upper surface of the lower connecting plate near its edge, and the threaded end of each fastening bolt I passes vertically downward through the lower sealing gasket and the lower surface of the large-diameter end of the packing gland, and is threaded and fixed to the corresponding position on the outer surface of the valve body, thereby fixing the oil reservoir housing and the valve body together, and the packing gland is used to tighten and position the packing.

[0013] The beneficial effects of this utility model are:

[0014] (1) This utility model has a simple structure and is easy to install. It replenishes the oil in the packing by storing oil, so as to achieve the effect of moisturizing the packing and maintaining its good sealing effect. This reduces the number of maintenance and increases the service life of the pneumatic lifting valve.

[0015] (2) By setting a dustproof rubber pad, this utility model can not only prevent dust and other foreign objects from contaminating the lubricating grease and avoid wear on the packing; it can also isolate the lubricating grease in the oil storage shell by sealing and scraping when the valve stem moves upward, thereby reducing the volatilization of the lubricating grease. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of an automatic lubrication device for a pneumatic lifting valve packing according to the present invention.

[0018] Figure 2 This is an internal sectional view of an automatic lubrication device for a pneumatic lifting valve packing according to the present invention.

[0019] Wherein, 1-valve body; 2-packing; 3-packing gland; 4-lower sealing gasket; 5-fastening bolt I; 6-oil reservoir shell; 7-dustproof rubber gasket; 8-fastening bolt II; 9-pressure flange; 10-valve stem. Detailed Implementation

[0020] The technical solution of this utility model will be clearly and completely described below through specific embodiments.

[0021] This utility model discloses an automatic lubrication device for a pneumatic lift valve packing, comprising a valve body 1, a valve stem 10, a packing 2, a packing gland 3, an oil reservoir 6, and a sealing assembly; the specific structure is as follows: Figure 1 , Figure 2 As shown, the vertically arranged valve stem 10 coaxially passes through the valve body 1, and a matching packing 2 is also coaxially sleeved on the outer side of the joint between the two, and the joint between the valve stem 10 and the valve body 1 is sealed by the packing 2.

[0022] Among them, a mounting groove matching the packing 2 is also coaxially and vertically embedded on the outer surface of the valve body 1 relative to the joint with the valve stem 10, and the packing 2 is coaxially sleeved on the valve stem 10 relative to the mounting groove, and the joint between the valve stem 10 and the valve body 1 is sealed by the packing 2.

[0023] The outer side of the valve body 1 of this utility model is facing upward, and a packing gland 3, an oil reservoir 6, and a sealing assembly are coaxially sleeved on the valve stem 10 from bottom to top relative to the outer side of the valve body 1. Figure 1 , Figure 2 As shown, the lower end of the oil reservoir housing 6 is screwed to the valve body 1 and the packing 2 is pressed and fixed by the packing gland 3; the sealing assembly seals the upper end of the oil reservoir housing 6 and automatically replenishes the packing 2 with the lubricating grease in the oil reservoir housing 6.

[0024] like Figure 1 , Figure 2 As shown, the packing gland 3 has a circular structure with a T-shaped cross-section. The packing gland 3 is coaxially sleeved on the valve stem 10, and its small-diameter end face is in close contact with the packing 2, while its large-diameter end is located outside the valve body 1. The outer diameter of the small-diameter end of the packing gland 3 matches the mounting groove, and the sum of the length of its small-diameter end and the thickness of the packing 2 must be greater than the opening depth of the mounting groove, thereby ensuring that the large-diameter end of the packing gland 3 is located outside the valve body 1. The inner diameter of the packing gland 3 is greater than the diameter of the valve stem 10, and the gap between it and the valve stem 10 must ensure that the lubricating grease in the oil reservoir 6 can be replenished to the packing 2 through the packing gland 3.

[0025] The oil storage shell 6 of this utility model is integrally formed from an upper connecting plate, an upper cylinder, a lower cylinder, and a lower connecting plate; as shown... Figure 1 , Figure 2As shown, the upper cylinder is a hollow frustum-shaped structure, and its large-diameter end is located on the side away from the valve body 1; the lower cylinder is a hollow cylindrical structure, and its inner and outer diameters are consistent with the inner and outer diameters of the small-diameter end of the upper cylinder, and are integrally formed coaxially with the small-diameter end of the upper cylinder; both the upper connecting plate and the lower connecting plate are annular, and the outer diameter of the upper connecting plate is consistent with the outer diameter of the large-diameter end of the upper cylinder, and is integrally formed coaxially with the end face of the large-diameter end of the upper cylinder; the outer diameter of the lower connecting plate is consistent with the outer diameter of the large-diameter end of the packing gland 3, and its inner diameter is consistent with the inner diameter of the lower cylinder, and is integrally formed coaxially with the lower end of the lower cylinder.

[0026] This utility model's sealing assembly includes a clamping flange 9, a dustproof rubber gasket 7, and fastening bolts II 8; as shown... Figure 1 , Figure 2 As shown, the inner diameter of the upper connecting plate is smaller than the inner diameter of the large diameter end of the upper cylinder, and a matching dustproof rubber pad 7 is coaxially fitted on its upper surface. The dustproof rubber pad 7 is coaxially sleeved on the valve stem 10 and does not interfere with the movement of the valve stem 10. The dustproof rubber pad 7 also provides dust protection for the inside of the oil storage shell 6. A matching clamping flange 9 is coaxially fitted on the valve stem 10 relative to the outside of the dustproof rubber pad 7. The clamping flange 9 has a circular structure, and its inner and outer diameters correspond to the inner and outer diameters of the upper connecting plate. It is coaxially fitted with the dustproof rubber pad 7. Several fastening bolts II8 are evenly distributed vertically along its circumference on the upper surface of the clamping flange 9. The clamping flange 9 is screwed and fixed to the upper connecting plate by the fastening bolts II8, thereby fixing the dustproof rubber pad 7.

[0027] The inner diameter of the lower connecting plate matches the diameter of the valve stem 10, and the gap between them is less than 5mm, ensuring that the lubricating grease in the oil reservoir 6 is supplied to the packing 2 through the gap between the lower connecting plate and the valve stem 10.

[0028] like Figure 1 , Figure 2 As shown, the lower surface of the lower connecting plate is coaxially fitted with the large-diameter end face of the packing gland 3, and a circular lower sealing gasket 4 is coaxially sleeved between the two; several fastening bolts I5 are evenly distributed vertically at intervals along the circumference of the upper surface of the lower connecting plate near its edge, and the threaded end of each fastening bolt I5 passes vertically downward through the lower sealing gasket 4 and the lower surface of the large-diameter end of the packing gland 3, and is threaded and fixed to the corresponding position on the outer surface of the valve body 1, thereby fixing the oil storage housing 6 and the valve body 1 together, and the packing gland 2 is pressed and positioned by the packing gland 3.

[0029] The working principle of this utility model is as follows: First, the lower sealing gasket 4 and the oil reservoir 6 are sequentially and coaxially sleeved on the valve stem 10 relative to the outside of the packing gland 3. Then, the lower end of the oil reservoir 6 is screwed and fixed to the valve body 1 via the packing gland 3 using fastening bolt I5. Next, lubricating grease is injected into the oil reservoir 6. After the injection is completed, the dustproof rubber gasket 7 and the clamping flange 9 are sequentially and coaxially sleeved on the valve stem 10 relative to the outside of the oil reservoir 6. Then, the clamping flange 9 is screwed and fixed to the oil reservoir 6 using fastening bolt II8. The dustproof rubber gasket 7 can achieve the dustproof effect, and the packing gland 2 can be replenished by the lubricating grease in the oil reservoir 6.

[0030] The beneficial effects of this utility model are:

[0031] (1) This utility model has a simple structure and is easy to install. It replenishes the oil in the packing 2 by storing oil, so as to achieve the effect of moisturizing the packing 2 and maintaining its good sealing effect; thereby reducing the number of maintenance and increasing the service life of the pneumatic lifting valve.

[0032] (2) By setting up a dustproof rubber pad 7, this utility model can not only prevent dust and other foreign objects from contaminating the lubricating grease and avoid wear on the packing 2, but also isolate the lubricating grease in the oil storage shell 6 by sealing and scraping when the valve stem 10 moves upward, thereby reducing the volatilization of the lubricating grease.

[0033] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the concept and scope of the present utility model. Without departing from the design concept of the present utility model, all modifications and improvements made by those skilled in the art to the technical solutions of the present utility model should fall within the protection scope of the present utility model. The technical content for which protection is sought in the present utility model has been fully recorded in the technical requirements.

Claims

1. A device for automatic lubrication of a pneumatic poppet valve packing, characterized in that: The valve includes a valve body, valve stem, packing, packing gland, oil reservoir, and sealing assembly. The vertically arranged valve stem coaxially passes through the valve body, and a matching packing is coaxially fitted onto the outer side of the joint between the two, sealing the joint between the valve stem and the valve body. The outer side of the valve body faces upward, and a packing gland, oil reservoir, and sealing assembly are coaxially fitted onto the valve stem from bottom to top relative to the outer side of the valve body. The lower end of the oil reservoir is screwed to the valve body, and the packing is pressed and fixed by the packing gland. The sealing assembly seals the upper end of the oil reservoir and automatically replenishes the packing with lubricating grease from within the oil reservoir.

2. A kind of automatic lubricating device of pneumatic poppet valve packing according to claim 1, characterized in that: A mounting groove matching the packing is also coaxially and perpendicularly embedded on the outer surface of the valve body relative to its joint with the valve stem, and the packing is coaxially sleeved on the valve stem relative to the mounting groove, and the joint between the valve stem and the valve body is sealed by the packing.

3. A kind of automatic lubricating device of pneumatic poppet valve packing according to claim 2, characterized in that: The packing gland has a circular ring structure with a T-shaped cross-section. The packing gland is coaxially sleeved on the valve stem, with its small-diameter end face in tight contact with the packing and its large-diameter end located outside the valve body. The outer diameter of the small-diameter end of the packing gland matches the mounting groove, and the sum of its small-diameter end length and the packing thickness must be greater than the opening depth of the mounting groove, thereby ensuring that the large-diameter end of the packing gland is located outside the valve body.

4. The automatic lubricating device for the packing of the pneumatic poppet valve according to claim 3, characterized in that: The inner diameter of the packing gland is larger than the diameter of the valve stem, and the gap between it and the valve stem must ensure that the lubricating grease in the oil reservoir can be replenished to the packing through the packing gland.

5. The automatic lubricating device for the packing of the pneumatic poppet valve according to claim 3, characterized in that: The oil storage shell is integrally formed from an upper connecting plate, an upper cylinder, a lower cylinder, and a lower connecting plate. The upper cylinder is a hollow frustum-shaped structure, with its large-diameter end located away from the valve body. The lower cylinder is a hollow cylindrical structure, with its inner and outer diameters matching the inner and outer diameters of the small-diameter end of the upper cylinder, and is integrally formed coaxially with the small-diameter end of the upper cylinder. Both the upper and lower connecting plates are annular, with the outer diameter of the upper connecting plate matching the outer diameter of the large-diameter end of the upper cylinder, and is integrally formed coaxially with the end face of the large-diameter end of the upper cylinder. The outer diameter of the lower connecting plate matches the outer diameter of the large-diameter end of the packing gland, and its inner diameter matches the inner diameter of the lower cylinder, and is integrally formed coaxially with the lower end of the lower cylinder.

6. A kind of automatic lubricating device of pneumatic poppet valve packing according to claim 5, characterized in that: The sealing assembly includes a clamping flange, a dustproof rubber gasket, and fastening bolts II. The inner diameter of the upper connecting plate is smaller than the large-diameter inner diameter of the upper cylinder, and a matching dustproof rubber gasket is coaxially fitted on its upper surface. The dustproof rubber gasket is coaxially sleeved on the valve stem and does not interfere with the movement of the valve stem. It also provides dust protection for the inside of the oil storage housing. A matching clamping flange is coaxially sleeved on the valve stem relative to the outer side of the dustproof rubber gasket. The clamping flange has an annular structure, and its inner and outer diameters correspond to the inner and outer diameters of the upper connecting plate. It is coaxially fitted with the dustproof rubber gasket. Several fastening bolts II are evenly distributed and vertically spaced along the circumference of the upper surface of the clamping flange. The clamping flange is screwed and fixed to the upper connecting plate by the fastening bolts II, thereby fixing the dustproof rubber gasket.

7. The automatic lubricating device for the packing of the pneumatic poppet valve according to claim 5, characterized in that: The inner diameter of the lower connecting plate matches the diameter of the valve stem, and the gap between them is less than 5mm, ensuring that the lubricating grease in the oil reservoir is supplied to the packing through the gap between the lower connecting plate and the valve stem.

8. The automatic lubricating device for the packing of the pneumatic poppet valve according to claim 5, characterized in that: The lower surface of the lower connecting plate is coaxially fitted with the large-diameter end face of the packing gland, and a circular lower sealing gasket is coaxially sleeved between the two. On the upper surface of the lower connecting plate, near its edge, several fastening bolts I are evenly distributed vertically at intervals along its circumference. The threaded end of each fastening bolt I passes vertically downward through the lower sealing gasket and the lower surface of the large-diameter end of the packing gland, and is threaded and fixed to the corresponding position on the outer surface of the valve body, thereby fixing the oil reservoir housing and the valve body together, and using the packing gland to tighten and position the packing.

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