Leveling air valve

Abstract

The utility model relates to the technical field of adjusting valves, in particular to a leveling air valve, which comprises an adjusting rod assembly, an adjusting rod assembly and an adjusting rod assembly, the adjusting rod assembly comprises a fine adjusting screw, a coarse adjusting screw and a supporting rod, and the fine adjusting screw and the coarse adjusting screw are both fixedly connected to the supporting rod; the valve body assembly comprises a valve body, a valve cavity, a valve rod, a valve element and a valve element seat, the top of the valve body is hinged to the end, away from the fine adjusting screw, of the supporting rod, the valve cavity is formed in the valve body, the valve element seat, the valve element and the valve rod are arranged in the valve cavity, and the valve body is connected with the air inlet connector, the air outlet connector and the silencer. An air inlet hole and an air outlet hole are formed in the valve element seat and communicated with the air inlet connector and the air outlet connector respectively, an air inlet cavity is formed between the valve element and the valve element seat, the air inlet hole is communicated with the air inlet cavity, the air inlet cavity and the air outlet hole are connected in a staggered mode, one end of the valve rod abuts against the top end of the valve element, and the other end of the valve rod extends out of the valve body and abuts against the coarse adjustment screw. A spring is assembled at the bottom end of the valve element.

Description

Technical Field

[0001] This utility model relates to the field of regulating valve technology, and in particular to a leveling air valve. Background Technology

[0002] As a precision regulating device, the leveling air valve plays a crucial role in various industrial and scientific applications, especially in scenarios where it is necessary to ensure the high stability of instruments on a platform and isolate them from ground vibration interference. Its core design concept lies in using passive airbags to effectively isolate vibration transmission between the platform and the ground or foundation structure, thereby protecting precision instruments from external environmental interference and ensuring their operational accuracy and stability.

[0003] However, traditional leveling valves face a series of challenges in application. First, while the connection between the air bladder and the valve can effectively support the platform, manual height adjustment often struggles to precisely meet the demands of complex and variable load and vibration conditions. Especially in dynamic environments, such as when instruments on the platform are performing precision measurements or machining tasks, even minor vibrations can disrupt the established balance and affect instrument performance.

[0004] Furthermore, O-rings, as critical sealing components, typically require specific grooves in their design to accommodate installation needs. This not only increases manufacturing complexity but can also affect adjustment flexibility and response speed due to the significant friction generated by the tight seal. To overcome this challenge, traditional methods tend to use spring systems with high stiffness to enhance overall vibration resistance. While this approach improves system stability to some extent, it also leads to excessive overall stiffness and insensitivity to minor vibrations, causing the leveling valve to be less responsive to rapid changes or fine adjustments.

[0005] Therefore, this application develops a leveling valve to solve the problems existing in the prior art. Utility Model Content

[0006] The purpose of this invention is to provide a leveling valve to solve the problem in the prior art where the airbag is directly inflated due to slight shaking, thus disrupting the platform's balance.

[0007] The technical solution of this utility model is: a leveling air valve, comprising:

[0008] An adjusting rod assembly includes a fine adjusting screw, a coarse adjusting screw, and a support rod. Both the fine adjusting screw and the coarse adjusting screw are fixedly connected to the support rod, and both ends extend outward from the support rod.

[0009] A valve body assembly includes a valve body, a valve cavity, a valve stem, a valve core, and a valve core seat. The top of the valve body is hinged to the end of the support rod away from the fine adjustment screw. The valve body has a valve cavity, and the valve cavity has a valve core seat, a valve core, and a valve stem. The valve body is connected to an air inlet connector, an air outlet connector, and a muffler, all of which communicate with the valve cavity. The air outlet connector is further connected to an airbag supporting the platform.

[0010] The valve core is slidably disposed within the valve core seat, which has an air inlet and an air outlet. The air inlet and air outlet are respectively connected to the air inlet connector and the air outlet connector. An air inlet chamber is formed between the valve core and the valve core seat. Under normal conditions, the air inlet is connected to the air inlet chamber, and the air inlet chamber is misaligned with the air outlet. One end of the valve stem abuts against the top of the valve core, and the other end extends out of the valve body and abuts against the coarse adjusting screw. A spring is fitted at the bottom of the valve core. When the fine adjusting screw is subjected to force, causing the support rod to rotate around the hinge point, the coarse adjusting screw pushes the valve stem downward, causing the valve core to move downward, thereby gradually increasing the communication area between the air inlet chamber and the air outlet.

[0011] Preferably, the valve core has a first protrusion and a second protrusion respectively arranged radially at its top and middle. The first protrusion and the second protrusion are both in contact with the inner wall surface of the valve core seat, and the air inlet chamber is formed between the first protrusion and the second protrusion. When the valve stem is not under force, the second protrusion seals the air outlet.

[0012] Preferably, the fine adjustment screw and the coarse adjustment screw are positioned far apart from each other, with the fine adjustment screw located on the side away from the hinge end of the support rod, and the coarse adjustment screw located on the side closer to the hinge end of the support rod.

[0013] Preferably, an end cap is screwed onto the end of the valve body away from the adjusting rod assembly. The cavity between the end cap and the valve core forms a pressure relief chamber. The spring is installed in the pressure relief chamber. The muffler communicates with the pressure relief chamber. A sealing ring is also provided inside the end cap. When the end cap is tightened, the elastic element abuts against the bottom surface of the valve core seat and the end cap.

[0014] Preferably, an elastic element is also provided in the pressure relief chamber, the elastic element abuts against the bottom surface of the valve core seat, and a pressure relief groove is provided on the bottom surface of the valve core seat, the pressure relief groove connecting the pressure relief chamber and the silencer.

[0015] Preferably, the air outlet is a square hole, and the square hole is arranged diagonally along the axial direction of the valve core. When the valve core moves downward, the communication area between the air outlet and the air inlet changes non-linearly.

[0016] Preferably, the outer wall of the valve core is provided with a sealing groove, and the sealing groove is filled with sealing oil.

[0017] Preferably, the outer wall of the valve core seat is provided with a plurality of annular grooves, each of which is provided with a sealing ring, and the outer surface of the sealing ring is in close contact with the inner wall of the valve body.

[0018] Compared with the prior art, the advantages of this utility model are:

[0019] (1) The coarse adjustment screw and the fine adjustment screw are far apart on the support rod, which not only makes the structure of the leveling air valve more compact and smaller in size, but also prevents the airbag from being directly triggered to inflate when the platform shakes or has a small displacement, thus maintaining the stability of the platform. In addition, it also improves the sensitivity of the leveling air valve to small vibrations, enabling it to respond to changes or make fine adjustments more quickly.

[0020] (2) The air outlet is designed to be square, and the diagonal is set along the axial direction of the valve core, so that the connection area between the air inlet chamber and the air outlet changes non-linearly, which can adjust the gas flow more smoothly, avoid sudden changes and instability in the flow, thereby improving the control accuracy and stability of the leveling valve.

[0021] (3) The sealing oil is filled in the sealing groove of the valve core to form a continuous oil film, which effectively prevents gas leakage and ensures the sealing performance of the leveling valve. At the same time, the sealing oil also has a certain lubricity, which can reduce the friction and wear between the valve core and the valve seat and extend the service life. Attached Figure Description

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0023] Figure 1 This is a cross-sectional view of a leveling air valve according to the present invention;

[0024] Figure 2 This is a schematic diagram of the structure of the leveling air valve described in this utility model;

[0025] Figure 3 This is a partial cross-sectional view of a leveling air valve according to the present invention;

[0026] Figure 4 This utility model Figure 3 Enlarged diagram of A in the middle;

[0027] Figure 5 This is a cross-sectional schematic diagram of the vent hole when it is sealed according to the present invention;

[0028] Figure 6 This utility model Figure 5 Enlarged diagram of B in the middle;

[0029] Figure 7 This is a cross-sectional schematic diagram of the air outlet and air inlet chamber of the present invention.

[0030] The components include: 1. Adjusting rod assembly; 11. Fine adjusting screw; 12. Coarse adjusting screw; 13. Support rod; 2. Valve body assembly; 21. Valve body; 22. Valve cavity; 23. Valve stem; 24. Valve core; 241. First protrusion; 242. Second protrusion; 25. Valve core seat; 251. Air inlet; 252. Air outlet; 26. End cap; 3. Air inlet connector; 4. Air outlet connector; 5. Silencer; 51. Pressure relief chamber; 52. Elastic element; 6. Air inlet chamber; 7. Spring; 8. Sealing groove; 9. Annular groove; 10. Sealing ring. Detailed Implementation

[0031] The present invention will be further described in detail below with reference to specific embodiments:

[0032] like Figures 1-4 As shown, a leveling valve includes an adjusting rod assembly 1 and a valve body assembly 2. The adjusting rod assembly 1 includes a fine adjusting screw 11, a coarse adjusting screw 12, and a support rod 13. The valve body assembly 2 includes a valve body 21, a valve cavity 22, a valve stem 23, a valve core 24, and a valve core seat 25. The fine adjusting screw 11 and the coarse adjusting screw 12 are both fixedly connected to the support rod 13. In the application scenario, the top end of the fine adjusting screw 11 abuts against the lower end face of the platform, and the platform is supported by the airbag. The lower end of the coarse adjusting screw 12 is used to abut against the valve stem 23, while the top of the valve body 21 is hinged to the end of the support rod 13 away from the fine adjusting screw 11.

[0033] A valve cavity 22 is provided inside the valve body 21. The valve cavity 22 is provided with a valve core seat 25, a valve core 24, and a valve stem 23. The valve core 24 is fitted with the valve core seat 25 and is coaxially arranged with the valve stem 23. The valve body 21 is connected to the air inlet connector 3, the air outlet connector 4, and the silencer 5. The movement of the valve core 24 enables the air inlet connector 3 and the air outlet connector 4 to communicate. Since the air outlet connector 4 is connected to the airbag, when the platform moves downward, the movement of the valve core 24 is achieved based on the transmission of the fine adjustment screw 11, the coarse adjustment screw 12, and the valve stem 23, thereby completing the air passage connection. The fine adjustment screw 11 and the coarse adjustment screw 12 are used to adjust the floating height of the airbag to support the platform.

[0034] Specifically, in combination Figure 7As shown, the valve core 24 slides within the valve core seat 25. The valve core seat 25 is provided with an air inlet 251 and an air outlet 252, which communicate with the air inlet connector 3 and the air outlet connector 4, respectively. The top and middle of the valve core 24 are respectively provided with a first protrusion 241 and a second protrusion 242 along its radial direction. Both the first protrusion 241 and the second protrusion 242 are in contact with the inner wall surface of the valve core seat 25, forming an air inlet chamber 6 between the first protrusion 241 and the second protrusion 242. An air inlet chamber 6 is formed between the valve core 24 and the valve core seat 25. The air inlet 251 communicates with the air inlet chamber 6, and the air inlet chamber 6 is misaligned with the air outlet 252. One end of the valve stem 23 abuts against the top of the valve core 24, and the other end extends out of the valve body 21 and abuts against the coarse adjusting screw 12. A spring 7 is installed at the bottom of the valve core 24. When the airbag is insufficient, the platform will tilt to one side. The overturning of the valve core 24 exerts pressure on the fine adjustment screw 11, causing it to rotate around the hinge point. This rotation, in turn, causes the coarse adjustment screw 12 to rotate and exert downward pressure on the valve stem 23, resulting in the valve stem 23 moving downward. Consequently, the valve core 24 moves downward. During the movement of the valve core 24, the air inlet 251 and the air inlet chamber 6 remain connected, ensuring a continuous flow of gas into the valve chamber 22. Initially, the air inlet chamber 6 and the air outlet 252 are not connected, ensuring the airtightness of the airbag and the valve chamber 22. As the valve core 24 continues to move downward, the air inlet chamber 6 connects with the air outlet 252, thus inflating the airbag. As the gas inside the airbag gradually increases, the airbag will support the platform in a horizontal position again. The fine adjustment screw 11 will no longer be subjected to the pressure of the overturning platform, and the valve core 24 will reset under the action of the spring 7, ceasing to inflate the airbag.

[0035] In this embodiment, as Figure 2 As shown, both ends of the fine adjustment screw 11 and the coarse adjustment screw 12 extend outward from the support rod 13, and the fine adjustment screw 11 and the coarse adjustment screw 12 are set far apart from each other. This allows the support rod 13 to provide stable support during adjustment, keeping the platform level and ensuring that the support rod 13 can effectively adjust the position of the valve core 24 of the air valve to control the airflow. At the same time, when the support rod 13 rotates, it drives the coarse adjustment screw 12 to rotate. The axial displacement of the coarse adjustment screw 12 and the fine adjustment screw 11 are different. The fine adjustment screw 11 needs to move a larger displacement for the coarse adjustment screw 12 to move a smaller displacement. This design not only makes the structure of the leveling air valve more compact and smaller in size, but also matches the distance between the upper bottom surface of the second protrusion 242 and the upper apex of the air outlet 252. Therefore, when there is normal shaking or slight displacement of the platform, the airbag will not be directly inflated, which would cause instability of the platform.

[0036] Furthermore, such as Figures 3-4As shown, the air outlet 252 is a square hole, and the square hole is arranged diagonally along the axial direction of the valve core 24. When the valve core 24 moves downward, the communication area between the air outlet 252 and the air inlet chamber 6 changes non-linearly. When the valve core 24 moves downward, the communication area between the square air outlet 252 and the air inlet chamber 6 gradually increases and shows a non-linear trend, so that the gas flow rate can be adjusted more smoothly with the movement of the valve core 24, avoiding sudden changes and instability in the flow rate.

[0037] It is important to note that, in combination Figure 1 , Figure 7 As shown, an end cap 26 is screwed onto the end of the valve body 21 away from the adjusting rod assembly 1. The cavity between the end cap 26 and the valve core 24 forms a pressure relief chamber 51. A sealing ring is also provided inside the end cap 26. When the valve core 24 moves downward in the valve core seat 25, the pressure relief chamber 51 below the valve core 24 gradually shrinks. In order to ensure the balance of gas pressure, it is necessary to relieve the pressure in the pressure relief chamber 51 below the valve core 24. In this embodiment, the muffler 5 is connected to the pressure relief chamber 51. Furthermore, since an elastic element 52 is also provided in the pressure relief chamber 51 in the assembled state, the elastic element 52 abuts against the bottom surface of the valve core seat 25 and the end cap 26 to press the valve core seat 25 against the valve cavity 22 and prevent the valve core seat 25 from moving during the exhaust process. In order to ensure that the muffler 5 can be connected to the pressure relief chamber 51, a pressure relief groove is opened on the bottom surface of the valve core seat 25.

[0038] like Figures 5-7 As shown, when sealing the leveling valve, an O-ring seal 10 is generally used. However, the O-ring seal 10 not only requires a corresponding receiving groove, but also requires a spring system with greater stiffness to enhance the overall vibration resistance. This results in the leveling valve having excessive overall stiffness and being insensitive to minor vibrations, making it less responsive to rapid changes or minor adjustments. Therefore, in this embodiment, a sealing groove 8 is provided on the outer wall of the valve core 24, and the sealing groove 8 is filled with sealing oil. After the sealing oil is filled into the sealing groove 8, it can form a continuous oil film. This oil film can effectively prevent gas or liquid leakage, thereby ensuring the sealing performance of the leveling valve. The sealing oil also has a certain degree of lubrication, which can reduce the friction between the valve core 24 and the valve seat, reduce wear, and extend the service life of the valve core 24 and the valve seat. This not only avoids excessive friction, but also eliminates the need to replace the larger spring system, thus avoiding affecting the sensitivity of the leveling valve.

[0039] Furthermore, the outer wall of the valve core seat 25 is provided with multiple annular grooves 9, and each annular groove 9 is provided with a sealing ring 10. The outer surface of the sealing ring 10 is in close contact with the inner wall of the valve body 21. The sealing ring 10 plays a certain role in buffering and vibration reduction between the valve core seat 25 and the valve body 21, reducing the risk of leakage and ensuring the overall safety and reliability of the leveling valve.

[0040] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and therefore, all changes falling within the meaning and scope of the equivalents of the claims are intended to be included within this utility model.

Claims

1. A leveling air valve, characterized in that, include: Adjusting rod assembly (1), the adjusting rod assembly (1) includes fine adjusting screw (11), coarse adjusting screw (12) and support rod (13), the fine adjusting screw (11) and the coarse adjusting screw (12) are both fixedly connected to the support rod (13), and both ends extend outward from the support rod (13); Valve body assembly (2), the valve body assembly (2) includes valve body (21), valve cavity (22), valve stem (23), valve core (24) and valve core seat (25), the top of the valve body (21) is hinged to the end of the support rod (13) away from the fine adjustment screw (11), the valve body (21) is provided with valve cavity (22), the valve cavity (22) is provided with valve core seat (25), valve core (24) and valve stem (23), the valve body (21) is connected to air inlet connector (3), air outlet connector (4) and muffler (5) respectively; The valve core (24) is slidably disposed within the valve core seat (25). The valve core seat (25) is provided with an air inlet (251) and an air outlet (252). The air inlet (251) and the air outlet (252) are respectively connected to the air inlet connector (3) and the air outlet connector (4). An air inlet chamber (6) is formed between the valve core (24) and the valve core seat (25). Under normal conditions, the air inlet (251) is connected to the air inlet chamber (6), and the air inlet chamber (6) and the air outlet (252) are misaligned. The valve stem (23) is connected in such a way that one end abuts against the top of the valve core (24), and the other end extends out of the valve body (21) and abuts against the coarse adjusting screw (12). The bottom end of the valve core (24) is equipped with a spring (7). When the fine adjusting screw (11) is subjected to force and the support rod (13) rotates around the hinge point, the coarse adjusting screw (12) pushes the valve stem (23) down, causing the valve core (24) to move down, so that the communication area between the air inlet chamber (6) and the air outlet (252) gradually increases.

2. The leveling air valve according to claim 1, characterized in that: The valve core (24) has a first protrusion (241) and a second protrusion (242) respectively arranged radially at its top and middle. The first protrusion (241) and the second protrusion (242) are both in contact with the inner wall of the valve core seat (25). The air inlet chamber (6) is formed between the first protrusion (241) and the second protrusion (242). When the valve stem (23) is not under force, the second protrusion (242) seals the air outlet (252).

3. A leveling air valve according to claim 2, characterized in that: The air outlet (252) is a square hole, and the square hole is arranged diagonally along the axial direction of the valve core (24). When the valve core (24) moves downward, the communication area between the air outlet (252) and the air inlet (6) changes non-linearly.

4. A leveling air valve according to claim 1, characterized in that: The fine adjustment screw (11) and the coarse adjustment screw (12) are positioned far apart from each other, with the fine adjustment screw (11) located on the side away from the hinge end of the support rod (13) and the coarse adjustment screw (12) located on the side close to the hinge end of the support rod (13).

5. A leveling air valve according to claim 1, characterized in that: An end cap (26) is screwed onto one end of the valve body (21) away from the adjusting rod assembly (1). The cavity between the end cap (26) and the valve core (24) forms a pressure relief chamber (51). The spring (7) is installed in the pressure relief chamber (51). The muffler (5) is connected to the pressure relief chamber (51). A sealing ring is also provided inside the end cap (26). When the end cap (26) is tightened, the elastic element (52) abuts against the bottom surface of the valve core seat (25) and the end cap (26).

6. A leveling air valve according to claim 5, characterized in that: An elastic element (52) is also provided in the pressure relief chamber (51). The elastic element (52) abuts against the bottom surface of the valve core seat (25). A pressure relief groove is opened on the bottom surface of the valve core seat (25). The pressure relief groove connects the pressure relief chamber (51) and the silencer (5).

7. A leveling air valve according to claim 1, characterized in that: The outer wall of the valve core (24) is provided with a sealing groove (8), and the sealing groove (8) is filled with sealing oil.

8. A leveling air valve according to claim 1, characterized in that: The outer wall of the valve core seat (25) is provided with a plurality of annular grooves (9), and each annular groove (9) is provided with a sealing ring (10), and the outer surface of the sealing ring (10) is in close contact with the inner wall of the valve body (21).

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