Vacuum valve main shaft connecting structure
By using fine threads and blind holes between the vacuum valve spindle and the slider, the air leakage caused by wear of the sealing ring is solved, the sealing and stability of the equipment is improved, and the maintenance frequency is reduced.
Patent Information
- Application Number
- CN202422040207.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-22
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2034-08-22
AI Technical Summary
In the prior art, the sealing ring between the main shaft of the vacuum valve and the slider is prone to wear or aging, causing air leakage of the vacuum valve, affecting use, reducing equipment stability and increasing maintenance frequency.
By providing a first thread at one end of the spindle and a second thread at the inner wall of the hole of the slider, the two adopt fine threads to screw in, combining the blind hole and nut design, a stable connection between the spindle and the slider is achieved to prevent loosening and air leakage.
It improves the sealing and connection strength between the vacuum valve spindle and the slider, reduces the maintenance frequency of the equipment, and enhances the stability of the equipment.
Smart Images
Figure CN222910953U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a vacuum valve main shaft connection structure, belonging to the technical field of vacuum equipment. Background Art
[0002] Vacuum valves refer to vacuum system components used to change the direction of airflow, adjust the amount of airflow, and cut off or connect pipelines in vacuum systems. There are many types of vacuum valves, which are usually classified according to the valve structure, drive mode, material and purpose. They are suitable for vacuum smelting, vacuum deoxidation, vacuum heat treatment, vacuum casting and other equipment.
[0003] The vacuum valve generally includes a housing, a valve core, a valve seat, a main shaft, a slider, a sealing ring and other parts. Among them, the main shaft of the vacuum valve is an important power transmission component, and its two ends are respectively connected to the atmospheric side component and the vacuum side component. In the prior art, a shaft seal is usually used when the vacuum valve main shaft is connected to the atmospheric side component, and a sealing ring is used to seal between the main shaft and the slider. However, during use, the sealing ring is prone to wear or aging, which causes the vacuum valve to leak, affects the use of the vacuum valve, reduces the stability of the equipment, and increases the maintenance frequency of the equipment. Utility Model Content
[0004] The utility model aims to provide a vacuum valve main shaft connection structure to solve the problem in the prior art that the sealing ring is easy to wear or age, causing vacuum valve leakage, affecting the use of the vacuum valve, reducing equipment stability, and increasing equipment maintenance frequency.
[0005] The utility model is realized by the following technical solutions:
[0006] A vacuum valve spindle connection structure, comprising: a spindle and a slider,
[0007] The main shaft is provided with a first thread, and the first thread is located at one end of the main shaft;
[0008] The slider is provided with a hole and a second thread, the hole is located at one end of the slider, and the second thread is located on the inner wall of the hole;
[0009] The first thread cooperates with the second thread, and the first thread can be screwed into the hole to connect the main shaft with the slider.
[0010] In one embodiment of the utility model, a nut is further included, and the hole is a blind hole. The blind hole separates the two sides of the slider into two unconnected spaces, solving the sealing problem between the main shaft and the slider.
[0011] In one embodiment of the utility model, the first thread and the second thread are both fine-pitch threads, and the first thread and the second thread have the same threading direction. The fine-pitch thread has a smaller helix angle, which is conducive to self-locking of the thread, can improve the connection strength between the main shaft and the slider, prevent the connection from loosening, and improve the stability of the device.
[0012] In one embodiment of the utility model, a nut is further included. The nut is sleeved on the outer circumference of the main shaft and abuts against the slider. The nut can lock the main shaft to prevent the connection from loosening.
[0013] In an implementation manner of the utility model, the sliding block is further provided with a groove, and the nut is arranged in the groove.
[0014] In one embodiment of the utility model, the main shaft is provided with an exhaust hole, and the exhaust hole is located at one end of the first thread, and the exhaust hole can discharge the residual air at the bottom of the hole.
[0015] In an embodiment of the present invention, the exhaust hole extends axially along the main shaft.
[0016] In an embodiment of the present invention, an axial extension distance of the exhaust hole is greater than a length of the first thread.
[0017] In one embodiment of the utility model, the main shaft and the slider are made of steel, and the shape of the hole in the exhaust hole is circular, which is convenient for production and processing.
[0018] In one embodiment of the utility model, the main shaft and the slider are made of steel, which can increase the connection strength between the main shaft and the slider, and the nut is made of stainless steel, which can improve the locking ability of the nut.
[0019] Beneficial Effects
[0020] The utility model provides a vacuum valve main shaft connection structure, in which a hole on a slider is set as a blind hole, so that two sides of the slider are separated into two unconnected spaces, thereby solving the problem of air leakage between the main shaft and the slider due to wear or aging of the sealing ring in the prior art and improving the sealing performance of the vacuum valve.
[0021] The vacuum valve spindle connection structure is provided with a first thread at one end of the spindle and a second thread on the inner wall of the hole, wherein the first thread and the second thread both adopt fine pitch threads, which have the advantages of good self-locking, high connection strength, and easy installation and disassembly. The first thread cooperates with the second thread, which not only improves the connection strength between the spindle and the slider, but also reduces the installation difficulty between the spindle and the slider.
[0022] The vacuum valve main shaft connection structure has a nut sleeved between the main shaft and the slider. The nut is a fine-pitch nut, which can cooperate with the first thread to lock the main shaft to prevent the connection between the main shaft and the slider from loosening, thereby improving the stability of the vacuum valve and reducing the maintenance frequency of the vacuum valve. An exhaust hole is also provided on the main shaft, which can discharge the gas in the hole when the main shaft is screwed into the hole to prevent residual air at the bottom of the hole. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 The utility model provides a cross-sectional view of a vacuum valve main shaft connection structure.
[0024] Figure 2 for Figure 1 A partial enlarged view of middle A.
[0025] Figure 3 A partial cross-sectional view of the main shaft provided by the utility model.
[0026] Figure 4 This is a cross-sectional view of the slider provided by the utility model.
[0027] In the figure: 1, main shaft; 11, first thread; 12, exhaust hole; 2, nut; 3, slider; 31, hole; 32, second thread; 33, groove. DETAILED DESCRIPTION
[0028] 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 part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of 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.
[0029] In the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0030] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.
[0031] like Figure 1 and Figure 2 As shown, this embodiment provides a vacuum valve spindle connection structure, including a spindle 1, a nut 2 and a slider 3, wherein the slider 3 is located on one side of the spindle 1 and is connected to the spindle 1. The nut 2 is sleeved between the spindle 1 and the slider 3 and can be screwed in the direction of the slider 3 until it fits with the slider 3, and the nut 2 is used to lock the spindle 1.
[0032] In some embodiments, a first thread 11 is provided at one end of the main shaft 1, the nut 2 is sleeved on the first thread 11, and the first thread 11 is connected to the slider 3. Further, the first thread 11 adopts a fine pitch thread, and the first thread 11 is connected to the slider 3 through the fine pitch thread. The fine pitch thread has a smaller helix angle, which is conducive to the self-locking of the thread, can improve the connection strength between the main shaft 1 and the slider 3, prevent the connection from loosening, and improve the stability of the device.
[0033] In some embodiments, Figure 4 As shown, a hole 31 is provided on one side of the slider 3. The hole 31 is a blind hole that does not penetrate the slider 3. The two sides of the slider 3 are separated into two unconnected spaces, which solves the problem of air leakage when the spindle 1 is connected to the slider 3. The inner wall of the hole 31 is provided with a second thread 32. Furthermore, the second thread 32 also uses a fine thread. The second thread 32 and the first thread 11 have the same thread screwing direction, so that the first thread 11 can cooperate with the second thread 32, and the spindle 1 is screwed into the hole 31 of the slider 3, so that the spindle 1 is connected to the slider 3. A groove 33 is provided on one side of the slider 3. The groove 33 is located on the side of the hole 31 close to the spindle 1. The groove 33 can abut against the nut 2 to limit the nut 2. After the spindle 1 is screwed into the hole 31, the nut 2 is screwed in the direction of the slider 3 until it abuts against the groove 33, so that the nut 2 locks the spindle 1.
[0034] In some embodiments, Figure 3As shown, the main shaft 1 is also provided with an exhaust hole 12, and the exhaust hole 12 is located at one end of the first thread 11. The exhaust hole 12 extends along the axial direction of the main shaft 1 away from the first thread 11. When the extension distance of the exhaust hole 12 is greater than the length of the first thread 11, the exhaust hole 12 changes its extension direction from axial extension to perpendicular to the axial extension, and extends to the outer surface of the main shaft 1. When the main shaft 1 is screwed into the hole 31, the exhaust hole 12 can exhaust the air in the hole 31 to prevent residual air from being left at the bottom of the hole 31.
[0035] Optionally, the shape of the hole in the exhaust hole 12 can be circular or polygonal. Preferably, the shape of the hole in the exhaust hole 12 is circular for easy processing.
[0036] Optionally, the nut 2 adopts a fine pitch thread, and the screwing direction is the same as that of the first thread 11, and can cooperate with the first thread 11 to tighten the main shaft 1 and prevent the connection between the main shaft 1 and the slider 3 from loosening.
[0037] Optionally, the outer shell edge of the nut 2 may be designed as a polygon, preferably, the outer shell edge of the nut 2 may be designed as a hexagon.
[0038] Optionally, in order to increase the connection strength between the main shaft 1 and the slider 3, the main shaft 1 and the slider 3 can be processed by steel. The nut 2 can be processed by stainless steel material, which can enable the nut 2 to obtain better locking ability.
[0039] Optionally, a plurality of chamfers are provided at one end of the main shaft 1 close to the first thread 11 to prevent workers from being scratched by sharp edges during installation.
[0040] The working principle of the utility model is as follows: the spindle 1 is screwed into the hole 31 of the slider 3 through the first thread 11 and the second thread 32, so that the spindle 1 is connected to the slider 3, and at the same time, the exhaust hole 12 exhausts the air at the bottom of the hole 31. Then the nut 2 is screwed in the direction of the slider 3 until it fits with the groove 33, so that the nut 2 can lock the spindle 1.
[0041] The utility model arranges a hole 31 on the slider 3, and arranges the hole 31 as a blind hole, thereby solving the problem in the prior art that the main shaft 1 and the slider 3 are sealed by a sealing ring, and leakage occurs after the sealing ring is worn, thereby improving the sealing between the main shaft 1 and the slider 3; utilizing the advantages of fine pitch threads such as good self-locking property, high connection strength, and easy installation and disassembly, the first thread 11, the second thread 32 and the nut 2 all adopt fine pitch threads, and the first thread 11 cooperates with the second thread 32 to connect the main shaft 1 and the slider 3, and then tightens with the nut 2 to prevent the connection between the main shaft 1 and the slider 3 from loosening, making the equipment more stable and reducing the maintenance frequency of the equipment.
[0042] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0043] The above embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the invention patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model.
[0044] The principles and implementation methods of the utility model are described in this article using specific examples. The description of the above examples is only used to help understand the method and core idea of the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model. Therefore, the scope of protection of the utility model patent shall be based on the attached claims.
Claims
1. A vacuum valve spindle connection structure, characterized in that: include: A spindle (1) and a slider (3); The main shaft (1) is provided with a first thread (11), and the first thread (11) is located at one end of the main shaft (1); The slider (3) is provided with a hole (31) and a second thread (32), wherein the hole (31) is located at one end of the slider (3), and the second thread (32) is located on the inner wall of the hole (31); The first thread (11) cooperates with the second thread (32) to connect the main shaft (1) and the slider (3).
2. A vacuum valve main shaft connection structure according to claim 1, characterized in that: The hole (31) is a blind hole.
3. A vacuum valve main shaft connection structure according to claim 1, characterized in that: The first thread (11) and the second thread (32) both adopt fine pitch threads, and the first thread (11) and the second thread (32) have the same threading direction.
4. A vacuum valve main shaft connection structure according to claim 1, characterized in that: It also comprises a nut (2), wherein the nut (2) is sleeved on the outer circumference of the main shaft (1) and abuts against the slider (3).
5. A vacuum valve main shaft connection structure according to claim 4, characterized in that: The slider (3) is also provided with a groove (33), and the nut (2) is arranged in the groove (33).
6. A vacuum valve main shaft connection structure according to claim 1, characterized in that: The main shaft (1) is provided with an exhaust hole (12), and the exhaust hole (12) is located at one end of the first thread (11).
7. A vacuum valve main shaft connection structure according to claim 6, characterized in that: The exhaust hole (12) extends axially along the main shaft (1).
8. A vacuum valve main shaft connection structure according to claim 7, characterized in that: The axial extension distance of the exhaust hole (12) is greater than the length of the first thread (11).
9. A vacuum valve main shaft connection structure according to claim 6, characterized in that: The shape of the hole in the exhaust hole (12) is circular.
10. A vacuum valve main shaft connection structure according to claim 4, characterized in that: The main shaft (1) and the sliding block (3) are made of steel, and the nut (2) is made of stainless steel.