Internal limiting mute cushioning structure of vacuum baffle valve

Abstract

The utility model relates to the technical field of vacuum flapper valves, and discloses a vacuum flapper valve internal limiting mute cushioning structure which comprises a valve shaft connected with a valve plate. The air cylinder shaft is connected with the valve shaft and drives the valve shaft to move; the inner edge of the limiting ring is clamped between the valve shaft and the air cylinder shaft; the elastic ring is connected to the side, facing the air cylinder shaft, of the outer edge of the limiting ring. The elastic ring replaces a limiting ring to make contact with the valve body sealing plate, noise and valve body vibration caused by limiting impact can be greatly eliminated through elastic deformation of the elastic ring, and the operation stability of the vacuum baffle valve and a vacuum system where the vacuum baffle valve is located is improved.

Description

Technical Field

[0001] This utility model relates to the field of vacuum baffle valve technology, and in particular to an internal limiting, silent, and vibration-damping structure for a vacuum baffle valve. Background Technology

[0002] The standard stroke cylinder of the vacuum baffle valve is installed on the outside of the valve body sealing plate. The cylinder shaft of the standard stroke cylinder passes through the sealing plate, driving the valve shaft and valve plate to move, thus opening and closing the vacuum baffle valve. Standard stroke cylinders are relatively inexpensive, making their use economically advantageous. However, the standard stroke cylinder often does not match the valve stroke, exhibiting a certain degree of error. In such cases, a limiting structure is required to restrict the cylinder stroke, ensuring the valve achieves the ideal opening and closing distance. However, during its movement with the cylinder shaft, the limiting structure may collide with the sealing plate to achieve the limiting effect. This collision generates significant noise and vibration, affecting the normal operation of the valve. Vacuum systems and vacuum baffle valves are highly sensitive to vibration, which is detrimental to the valve's normal operation. Utility Model Content

[0003] The purpose of this utility model is to solve the problems in the prior art mentioned above and to provide an internal limiting, silent, and vibration-damping structure for a vacuum baffle valve.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] An internal limiting, noise reduction, and vibration damping structure for a vacuum baffle valve includes:

[0006] The valve shaft connects to the valve plate;

[0007] The cylinder shaft is connected to the valve shaft and drives the valve shaft to move;

[0008] The inner edge of the limiting ring is clamped between the valve shaft and the cylinder shaft;

[0009] An elastic ring is connected to the outer edge of the limiting ring on the side facing the cylinder shaft.

[0010] Furthermore, the valve shaft and the cylinder shaft are connected by threads.

[0011] Furthermore, a stud is provided in the middle of the valve shaft end face, and a threaded hole that mates with the stud is provided in the middle of the cylinder shaft end face; the limiting ring surrounds the stud.

[0012] Furthermore, the elastic ring surrounds the cylinder shaft; the elastic ring is a polytetrafluoroethylene ring.

[0013] Furthermore, the cylinder shaft end has an annular recess on the outer ring side.

[0014] Furthermore, the recessed portion has a chamfer at the end away from the limiting ring.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] The elastic ring of this invention replaces the limiting ring in contact with the valve body sealing plate. Through the elastic deformation of the elastic ring itself, the noise and valve body vibration caused by the limiting impact can be greatly eliminated, improving the stability of the vacuum baffle valve and the vacuum system in which it is located. The recessed part of this invention can accommodate the inward deformation of the elastic ring, adapt to thicker elastic rings, achieve a stronger silent vibration damping effect, and prevent the elastic ring from expanding outward and falling off under pressure. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] Figure 2 for Figure 1 Enlarged view of the middle section.

[0019] In the diagram: 1. Valve shaft; 2. Cylinder shaft; 3. Stud; 4. Threaded hole; 5. Limiting ring; 6. Elastic ring; 7. Recess; 8. Chamfer; 9. Valve body; 10. Valve plate; 11. Sealing plate; 12. Standard stroke cylinder; 13. Sealing ring. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the present utility model; that is, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The components of the embodiments of the present utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0021] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the term "provided with" should be interpreted broadly. For example, the object "provided with" can be a part of the main body, or it can be separately arranged from the main body and connected to it. This connection can be detachable or non-detachable. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] The present invention will be further described in detail below with reference to the embodiments.

[0024] A specific embodiment of the internal limiting, noise reduction, and vibration damping structure of the vacuum baffle valve provided by this utility model:

[0025] Please see Figure 1-2 The vacuum baffle valve in this embodiment includes a valve body 9, a valve plate 10 is disposed in the cavity of the valve body 9, and the valve plate 10 is connected to the valve shaft 1 by bolts; a sealing plate 11 is installed on one side of the valve body 9 by bolts, and a standard stroke cylinder 12 is installed on the outside of the sealing plate 11. The cylinder shaft 2 of the standard stroke cylinder 12 slides through the sealing plate 11 and is connected to the valve shaft 1, thereby driving the valve shaft 1 and the valve plate 10 to move, thereby realizing the opening and closing of the valve.

[0026] To improve the sealing, vibration damping and noise reduction effect, an annular groove is provided on the outer edge of the valve plate 10 facing the valve port of the valve body 9, and a protruding sealing ring 13 is provided in the annular groove. The cross-section of the annular groove is dovetail-shaped.

[0027] The vacuum baffle valve internal limiting, noise reduction, and vibration damping structure of this embodiment includes a valve shaft 1, a cylinder shaft 2, a limiting ring 5, and an elastic ring 6.

[0028] Valve shaft 1 is connected to valve plate 10 of vacuum baffle valve; cylinder shaft 2 of standard stroke cylinder 12 is connected to valve shaft 1 and drives valve shaft 1 and valve plate 10 to reciprocate.

[0029] The valve shaft 1 and the cylinder shaft 2 are connected by threads. Specifically, the valve shaft 1 has a stud 3 in the middle of its end face, and the cylinder shaft 2 has a threaded hole 4 in the middle of its end face that mates with the stud 3.

[0030] The inner edge of the limiting ring 5 is clamped between the valve shaft 1 and the cylinder shaft 2; the limiting ring 5 surrounds the stud 3, and the limiting ring 5 is a hard ring structure; the inner diameter of the limiting ring 5 is larger than the outer diameter of the stud 3, and the outer diameter of the limiting ring 5 is larger than the outer diameter of the cylinder shaft 2.

[0031] The elastic ring 6 is connected to the outer edge of the limiting ring 5 on the side facing the cylinder shaft 2, and the elastic ring 6 surrounds the cylinder shaft 2; the elastic ring 6 is a polytetrafluoroethylene (PTFE) ring, and the PTFE material of the elastic ring 6 will not cause pollution to the vacuum environment, and the material itself has a lubricating effect. When the elastic ring 6 is not subjected to external force, its inner diameter is equal to the outer diameter of the cylinder shaft 2; the outer diameter of the unused elastic ring 6 is the same as the outer diameter of the limiting ring 5.

[0032] like Figure 1 As shown, during the lifting process of cylinder shaft 2, the limiting ring 5 and elastic ring 6 restrict the lifting distance of cylinder shaft 2, thus achieving the limiting function. The elastic ring 6 contacts the sealing plate 11 first on the upper side of the limiting ring 5. The elastic ring 6 is deformable, which weakens the impact effect, greatly eliminates noise, and significantly reduces the vibration of sealing plate 11 and valve body 9 caused by impact, thus achieving silence and vibration damping.

[0033] The cylinder shaft 2 has an annular recess 7 on the outer ring side at its end, and a chamfer 8 is provided at the end of the recess 7 away from the limiting ring 5. In this embodiment, the total height of the recess 7 and the upper chamfer 8 is the same as the axial height of the elastic ring 6. The upper end of the chamfer 8 radially limits the inner side of the upper end of the elastic ring 6, reducing the radial misalignment of the upper end of the elastic ring 6.

[0034] During the impact between the elastic ring 6 and the sealing plate 11, the elastic ring 6 is compressed and undergoes elastic deformation. The recess 7 located inside the elastic ring 6 and on the outer ring side of the lower end of the cylinder shaft 2 can accommodate the radial inward expansion of the elastic ring 6, thereby allowing the elastic ring 6 to stably surround the outer side of the cylinder shaft 2. This prevents the elastic ring 6 from frequently expanding radially outward and falling off, and also ensures that the axially thicker elastic ring 6 can deform stably on the outer side of the cylinder shaft 2 without falling off, thus achieving a strong noise reduction and vibration damping effect. During the reset process of the elastic ring 6, the chamfer 8 facilitates a smoother reset of the upper end of the elastic ring 6, reducing the self-vibration of the elastic ring 6 during the reset process.

[0035] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still make modifications to the technical solutions described in the foregoing embodiments without creative effort, or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A vacuum baffle valve internal limiting, noise reduction, and vibration damping structure, characterized in that, include: Valve shaft (1) is connected to valve plate (10); The cylinder shaft (2) is connected to the valve shaft (1) and drives the valve shaft (1) to move; The inner edge of the limiting ring (5) is clamped between the valve shaft (1) and the cylinder shaft (2); An elastic ring (6) is connected to the outer edge of the limiting ring (5) on the side facing the cylinder shaft (2).

2. The vacuum baffle valve internal limiting, noise reduction, and vibration damping structure according to claim 1, characterized in that, The valve shaft (1) and the cylinder shaft (2) are connected by threads.

3. The vacuum baffle valve internal limiting, noise reduction, and vibration damping structure according to claim 2, characterized in that, The valve shaft (1) has a stud (3) in the middle of its end face, and the cylinder shaft (2) has a threaded hole (4) in the middle of its end face that mates with the stud (3); the limiting ring (5) surrounds the stud (3).

4. The internal limiting, noise reduction, and vibration damping structure of the vacuum baffle valve according to claim 1, characterized in that, The elastic ring (6) surrounds the cylinder shaft (2); the elastic ring (6) is a polytetrafluoroethylene ring.

5. The vacuum baffle valve internal limiting, noise reduction, and vibration damping structure according to claim 1, characterized in that, The cylinder shaft (2) has an annular recess (7) on the outer ring side of its end.

6. The vacuum baffle valve internal limiting, noise reduction, and vibration damping structure according to claim 5, characterized in that, The recessed portion (7) has a chamfer (8) at the end away from the limiting ring (5).

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