Valve packing pre-tightening structure

Abstract

The utility model relates to the technical field of valves, and discloses a valve packing pre-tightening structure which comprises a valve cover arranged on the periphery of a valve rod, a fixing ring is attached to the surface of the valve cover, a lubricating sealing disc is fixed to the top of the fixing ring, and a sealing ring is connected to the inner periphery of the lubricating sealing disc in an inserted mode. A wear-resistant metal ring capable of freely rotating is arranged between the inner circumference of the sealing ring and the outer circumference of the valve rod, the driving assembly is fixed to the outer circumference of the lubricating sealing disc and used for driving a rotating ring rotationally arranged on the inner circumference of the lubricating sealing disc, and a spiral inclined face is integrally formed on the top of the rotating ring. The sealing effect between the packing structure and the valve rod can be improved in an auxiliary mode, the lubricating effect can be guaranteed, the abrasion degree of the valve rod is reduced, and the service life of the valve is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a valve packing pre-tightening structure. Background Art

[0002] A valve is a device used to control the direction, pressure, and flow of a fluid in a fluid system. It is a device that allows the medium (liquid, gas, powder) in pipes and equipment to flow or stop and control its flow. A valve is a control component in a pipeline fluid delivery system. It is used to change the cross-section of the passage and the flow direction of the medium. It has functions such as diversion, shutoff, throttling, non-return, diversion, or overflow pressure relief. Valves used for fluid control come in a wide variety of varieties and specifications, from the simplest shutoff valve to various valves used in extremely complex automatic control systems. The nominal diameter of the valve ranges from extremely small instrument valves to industrial pipeline valves with a diameter of up to 10m.

[0003] Although valves are widely used, they are prone to failure and reduced service life during use, especially in high temperature and high pressure environments or polluted environments. The packing mechanism of existing valves will cause friction with the valve stem during use, resulting in increased wear of the contact parts. If lubrication and maintenance are lacking for a long time, gaps will appear there, affecting the sealing effect of the valve stem and causing foreign matter to enter the periphery of the valve stem, exacerbating wear. For this reason, we propose a valve packing pre-tightening structure. Utility Model Content

[0004] The utility model aims to provide a valve packing pre-tightening structure to solve the problem that the water purifier proposed in the above background technology needs to be installed with the aid of an auxiliary bracket, which is labor-intensive and cumbersome as a whole.

[0005] To achieve the above purpose, the utility model provides the following technical solution: a valve packing pre-tightening structure, comprising:

[0006] The valve cover is arranged on the outer periphery of the valve stem, and a fixing ring is attached to its surface. A lubricating sealing disk is fixed on the top of the fixing ring. A sealing ring is inserted into the inner periphery of the lubricating sealing disk. A freely rotatable wear-resistant metal ring is arranged between the inner periphery of the sealing ring and the outer periphery of the valve stem.

[0007] The driving assembly is fixed on the outer periphery of the lubricating sealing disk, and is used for driving and rotating a rotating ring arranged on the inner periphery of the lubricating sealing disk, wherein the top of the rotating ring is integrally formed with a spiral inclined surface.

[0008] Preferably, the drive assembly includes a sealing fitting sheet fixed to the outer periphery of the lubricating sealing disk, a fixing sheet is fixed to the outer periphery of the sealing fitting sheet, a motor is mounted on the outer wall of the fixing sheet, and the output shaft of the motor extends into the lubricating sealing disk, and a driving bevel gear is fixed to the end of the motor.

[0009] Preferably, a rubber ring that fits on the inner circumference of the lubricating sealing disk is sleeved and fixed on the outer circumference of the sealing ring, and an annular groove that matches the rubber ring is constructed on the inner circumference of the lubricating sealing ring.

[0010] Preferably, a grease filling chamber is internally configured in the lubricating sealing disk, and a sealed grease filling cap is screwed on the top of the lubricating sealing disk.

[0011] Preferably, a bevel gear disc meshingly connected to the driving bevel gear is sleeved and fixed on the outer periphery of the rotating ring, and a limiting groove adapted to the bevel gear disc is constructed on the inner periphery of the lubricating sealing disc.

[0012] Preferably, the outer periphery of the lubricating sealing disk is configured with an observation groove, and the outer wall of the observation groove may be provided with scale lines.

[0013] Preferably, the surface of the valve cover is structured with circular holes distributed in a circular array.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. The utility model drives the bevel gear disk and the rotating ring to rotate through the driving component. During the use of the valve, the grease injected into the lubricating sealing disk can be driven to flow upward through continuous rotation, and the grease falls back under the action of its own gravity, thereby forming a balanced state, so that the grease is evenly attached to the outer periphery of the valve stem inside the lubricating sealing disk, which can not only assist in improving the sealing effect between the packing structure and the valve stem, but also ensure the lubrication effect, reduce the wear of the valve stem, and extend the service life of the valve.

[0016] 2. The utility model can seal from the top of the contact part between the valve stem and the packing mechanism through the lubricating sealing disk, sealing ring, rubber ring and wear-resistant metal ring, effectively preventing foreign matter from entering the lubricating sealing disk through the gap between the lubricating sealing disk and the valve stem, ensuring smooth rotation of the valve stem and further extending the service life of the valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This is a cross-sectional view of the lubricating sealing disc of the utility model;

[0019] Figure 3 An exploded view of the drive assembly of the utility model;

[0020] Figure 4 It is a structural schematic diagram of the sealing ring of the utility model.

[0021] In the figure: 1. valve stem; 2. valve cover; 3. fixing ring; 4. lubricating sealing disk; 5. sealing ring; 6. rubber ring; 7. wear-resistant metal ring; 8. driving assembly; 81. sealing fitting sheet; 82. fixing sheet; 83. motor; 84. driving bevel gear; 9. rotating ring; 10. bevel gear disk; 11. scale line; 12. grease filling cap. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] Example

[0024] See also Figure 1-Figure 4 A valve packing pre-tightening structure shown in the figure comprises a valve cover 2 arranged on the outer periphery of a valve stem 1, a fixing ring 3 is fitted on the surface of the valve cover 2, a lubricating sealing disk 4 is fixed on the top of the fixing ring 3, a sealing ring 5 is inserted on the inner periphery of the lubricating sealing disk 4, a freely rotatable wear-resistant metal ring 7 is arranged between the inner periphery of the sealing ring 5 and the outer periphery of the valve stem 1, a driving component 8 is fixed on the outer periphery of the lubricating sealing disk 4, and is used to drive and rotate a rotating ring 9 arranged on the inner periphery of the lubricating sealing disk 4, a spiral inclined surface is integrally formed on the top of the rotating ring 9, a bevel gear disk 10 meshingly connected to the driving bevel gear 84 is sleeved and fixed on the outer periphery of the rotating ring 9, and a limiting groove adapted to the bevel gear disk 10 is constructed on the inner periphery of the lubricating sealing disk 4.

[0025] The driving assembly 8 drives the rotating ring 9 to rotate on the inner circumference of the lubricating sealing disk 4 through the bevel gear disk 10. When the rotating ring 9 with a spiral slope on the top rotates, it can drive the grease injected into the lubricating sealing disk 4 to flow upward, and the grease flows downward under the action of its own gravity, forming the grease suspended on the inner circumference of the lubricating sealing disk 4 and tightly fitting between the valve stem 1 and the inner circumference of the lubricating sealing disk 4.

[0026] Specifically, the driving assembly 8 includes a sealing fitting sheet 81 which is fitted and fixed to the outer periphery of the lubricating sealing disk 4, a fixing sheet 82 is fitted and fixed to the outer periphery of the sealing fitting sheet 81, a motor 83 is installed on the outer wall of the fixing sheet 82, and the output shaft of the motor 83 extends into the lubricating sealing disk 4, and a driving bevel gear 84 is fixed to the end of the motor 83.

[0027] The output shaft of the motor 83 drives the driving bevel gear 84 to mesh with the bevel gear plate 10 for transmission, thereby driving the rotating ring 9 to rotate continuously.

[0028] Specifically, a rubber ring 6 that fits on the inner circumference of the lubricating sealing disk 4 is sleeved and fixed on the outer circumference of the sealing ring 5 , and an annular groove that matches the rubber ring 6 is constructed on the inner circumference of the lubricating sealing ring 5 .

[0029] The rubber ring 6 protrudes from the outer circumference of the sealing ring 5 , and can play a role in sealing and facilitating the positioning and installation of the sealing ring 5 inside the lubricating sealing disk 4 .

[0030] Specifically, a lubricating grease filling chamber is configured inside the lubricating sealing disk 4 , and a sealed lubricating grease filling cap 12 is screwed onto the top of the lubricating sealing disk 4 .

[0031] The grease filling cavity facilitates the addition of grease into the lubricating sealing disk 4 after the grease filling cap 12 is opened.

[0032] Specifically, an observation groove is configured on the outer periphery of the lubricating sealing disk 4 , and scale lines 11 may be provided on the outer wall of the observation groove.

[0033] The observation groove is supported by transparent material so that the use of grease can be observed from the outside.

[0034] Specifically, the surface of the valve cover 2 is configured with circular holes distributed in an annular array.

[0035] The valve cover 2 can be conveniently fixed on the valve body through the circular hole.

[0036] It should be noted that the utility model is a valve packing pre-tightening structure. During daily maintenance, the use of grease can be checked through the observation groove. If the grease level is low, the grease filling cap 12 can be unscrewed, and the grease can be injected into the lubricating sealing disk 4 through the grease filling chamber through a needle. When the valve is in use, the motor 83 drives the driving bevel gear 84 to engage with the bevel gear disk 10 for transmission, so that the rotating ring 9 rotates continuously. Under the action of the spiral inclined surface on the top of the rotating ring 9, the grease is driven to flow upward, so that the grease is suspended in the shape of a mushroom cloud and fits between the valve stem 1 and the inner periphery of the lubricating sealing disk 4, which can not only assist in sealing the valve stem 1 and the lubricating sealing disk 4, but also achieve a stable lubrication effect.

[0037] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0038] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A valve packing pre-tightening structure, characterized in that: include: A valve cover (2) is arranged on the outer periphery of the valve stem (1), and a fixing ring (3) is fitted on its surface. A lubricating sealing disk (4) is fixed on the top of the fixing ring (3). A sealing ring (5) is inserted into the inner periphery of the lubricating sealing disk (4). A freely rotatable wear-resistant metal ring (7) is arranged between the inner periphery of the sealing ring (5) and the outer periphery of the valve stem (1); A driving assembly (8) fixed to the outer periphery of the lubricating sealing disk (4) is used to drive a rotating ring (9) arranged on the inner periphery of the lubricating sealing disk (4) to rotate, wherein a spiral inclined surface is integrally formed on the top of the rotating ring (9).

2. A valve packing pre-tightening structure according to claim 1, characterized in that: The driving assembly (8) comprises a sealing fitting sheet (81) fitted and fixed to the outer periphery of the lubricating sealing disk (4); a fixing sheet (82) is fitted and fixed to the outer periphery of the sealing fitting sheet (81); a motor (83) is mounted on the outer wall of the fixing sheet (82); an output shaft of the motor (83) extends into the lubricating sealing disk (4); and a driving bevel gear (84) is fixed to the end of the motor (83).

3. A valve packing pre-tightening structure according to claim 1, characterized in that: The outer periphery of the sealing ring (5) is sleeved and fixed with a rubber ring (6) which fits on the inner periphery of the lubricating sealing disk (4), and the inner periphery of the lubricating sealing ring (5) is structured with an annular groove which matches the rubber ring (6).

4. A valve packing pre-tightening structure according to claim 1, characterized in that: The lubricating sealing disk (4) is internally structured with a lubricating grease filling cavity, and a sealed lubricating grease filling cap (12) is screwed on the top of the lubricating sealing disk (4).

5. A valve packing pre-tightening structure according to claim 2, characterized in that: A bevel gear disc (10) meshingly connected to the driving bevel gear (84) is sleeved and fixed on the outer periphery of the rotating ring (9), and a limiting groove adapted to the bevel gear disc (10) is constructed on the inner periphery of the lubricating sealing disc (4).

6. A valve packing pre-tightening structure according to claim 1, characterized in that: The outer periphery of the lubricating sealing disk (4) is configured with an observation groove, and the outer wall of the observation groove may be provided with scale lines (11).

7. A valve packing pre-tightening structure according to claim 1, characterized in that: The surface of the valve cover (2) is provided with circular holes distributed in an annular array.

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