Pressure regulating column sealing structure of pneumatic pressure reducing valve

Abstract

The pressure regulating column sealing structure solves the problems that a pressure regulating column of a pneumatic pressure reducing valve is poor in sealing performance, fast in abrasion and prone to affecting the pressure regulating work of the valve, and comprises a pressure regulating column with the upper end diameter slightly larger than the column body diameter and a sealing base arranged at the lower end of the pressure regulating column. The sealing base is arranged to be circular and integrally connected with the pressure regulating column, the annular leakage stopping pad is embedded in the sealing base, a sealing structure is formed by optimizing the shape and angle of the lower end of the leakage stopping pad, the good self-adaptive sealing effect is achieved, it is guaranteed that the sealing effect is durable and stable, abrasion is reduced, and then the pressure control precision of the pressure reducing valve is guaranteed; the working efficiency is improved and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the field of pneumatic valves, in particular to a pressure regulating column sealing structure of a pneumatic pressure reducing valve. Background Art

[0002] A gas pressure reducing valve is a valve that changes the throttling area of ​​the volcano vent to change the flow rate and kinetic energy of the fluid, causing different pressure drops, thereby achieving and maintaining different pressures on the outlet side, and using its own energy to automatically make the outlet pressure meet the predetermined requirements. Gas pressure reducing valves are widely used in gas pipeline systems to reduce high-pressure gas to the required low pressure to meet the needs of the system.

[0003] In traditional industrial automation and control systems, the design background of the pneumatic pressure reducing valve pressure regulating column is mainly to solve the problem of how to achieve accurate and stable pressure regulation in the gas pressure system. As a key component of the pneumatic pressure reducing valve, the pressure regulating column mainly ensures the precise pressure control of the pressure reducing valve and can more accurately maintain the set output pressure. At the same time, the structure and material of the pressure regulating column are optimized to ensure the sealing effect between the pressure regulating column and the valve seat, reduce internal leakage, ensure the long-term stable operation of the valve, and reduce energy waste.

[0004] In the prior art, pneumatic pressure reducing valves are commonly used pressure regulating equipment in industrial production, and the sealing performance of the pressure regulating column directly affects the working efficiency and service life of the valve. However, the traditional pressure regulating column sealing structure has problems such as unstable sealing effect and rapid wear, which urgently need to be improved.

[0005] Chinese patent publication number CN208764352U, publication date April 19, 2019, the name of the invention is a pneumatic pressure reducing valve. The scheme discloses a pneumatic pressure reducing valve, the disadvantage of which is that the sealing structure of the pressure regulating column has unstable sealing effect and wears quickly, which may lead to the pressure reducing valve having low pressure control accuracy, low working efficiency and short service life. Utility Model Content

[0006] The utility model solves the problems that a pressure regulating column of a pneumatic pressure reducing valve has poor sealing performance, rapid wear and easy influence on the pressure regulating work of the valve, and provides a sealing structure of a pressure regulating column of a pneumatic pressure reducing valve.

[0007] In order to achieve the above practical purpose, this utility adopts the following technical solutions:

[0008] A pressure regulating column sealing structure of a pneumatic pressure reducing valve comprises a pressure regulating column. A sealing base is further arranged at the lower end of the pressure regulating column. The sealing base is arranged in a circular shape and is integrally connected with the pressure regulating column.

[0009] The pressure regulating column sealing structure also includes a leak-proof pad, which is arranged on the sealing base. In the present invention, a pressure regulating column sealing structure of a pneumatic pressure reducing valve is provided with a circular sealing base at the lower end of the column body of the pressure regulating column, and a circular leak-proof pad is inlaid and installed on the sealing base. The sealing structure is formed by optimizing the shape and angle of the lower end of the leak-proof pad, thereby achieving a good adaptive sealing effect. The leak-proof pad is made of wear-resistant material and has excellent pressure resistance and wear resistance. At the same time, its unique floating design enables it to automatically adjust its position when the pressure changes, ensuring a long-lasting and stable sealing effect. The leak-proof pad itself also has a certain elastic deformation ability, which can be deformed under pressure and continuously apply a pre-tightening force to the sealing ring, further enhancing the sealing performance.

[0010] Preferably, the anti-leakage pad is provided in an annular shape and is embedded and connected with the sealing base. In the present application, the annular anti-leakage pad (also called sealing pad or sealing ring) is embedded and connected with the sealing base on the pressure regulating column of the pneumatic pressure reducing valve. The main function is to ensure the sealing of the pressure channel inside the valve body. The sealing base is provided with an annular groove, and the annular groove is consistent with the shape of the lower end of the anti-leakage pad.

[0011] As a dynamic sealing element, the anti-leakage pad can effectively prevent high-pressure gas from leaking from the main valve cavity to the low-pressure side through the gap between the pressure regulating column and the valve body, thereby maintaining a stable output pressure after pressure regulation. Good sealing performance helps to improve the pressure setting accuracy and stability of the pressure reducing valve during operation, ensuring that the valve can accurately control the output pressure at the set pressure value. The anti-leakage pad is usually made of wear-resistant, high-temperature-resistant, and corrosion-resistant materials, which can withstand the pressure shock and temperature changes of the gas medium and extend the service life of the valve. When the sealing gasket needs to be replaced due to wear or damage due to long-term use, this inlaid connection design also facilitates maintenance personnel to quickly disassemble and maintain it.

[0012] Preferably, a plurality of sealing walls are arranged at the edge of the sealing base, and the sealing walls are arranged in a row on the sealing base. In the present invention, the sealing walls at the edge of the pressure regulating column of the pneumatic pressure reducing valve can effectively enhance the sealing effect and improve the stability, and can also play a structural support and guiding function.

[0013] In the present invention, multiple points of contact and sealing are formed between the sealing wall and the anti-leakage pad or other corresponding matching parts, which effectively prevents gas from leaking axially from the inside of the valve body, ensuring the high sealing performance of the valve under different working conditions. Through the design of multiple sealing walls, the pressure load can be dispersed, so that the pressure on each sealing wall is more uniform, thereby enhancing the stability and durability of the pressure reducing valve. The sealing wall sometimes also plays a certain guiding role. When the pressure regulating column moves up and down to adjust the pressure, it can ensure that the movement trajectory of the plunger is accurate and will not deviate, thereby ensuring the precise execution of the pressure regulating action. Multiple sealing walls can provide better mechanical support for the pressure regulating column, prevent deformation or damage caused by uneven force, especially under high pressure difference, frequent adjustment and other working conditions, to maintain good mechanical properties.

[0014] A sealing interval of uniform width is provided between each sealing wall. In the present invention, a sealing interval of uniform width is provided between the sealing walls. Such a design of multiple sealing walls can provide a multi-stage sealing effect. Even if a seal fails due to wear or pressure fluctuation, other sealing walls can continue to maintain basic sealing performance to prevent gas leakage. The same design of each sealing interval helps to evenly distribute the pressure of high-pressure gas when it passes through each sealing interval, thereby avoiding seal damage caused by local overpressure and improving the service life and reliability of the overall valve. Equal sealing intervals ensure that the contact between different sealing walls is more balanced during the movement and adjustment of the pressure regulating column, reducing unnecessary friction and wear, which is conducive to ensuring the smoothness and accuracy of the pressure regulating action. Consistent sealing intervals help to standardize the production of parts, reduce manufacturing difficulty and cost, and are also conducive to precise alignment and positioning during assembly.

[0015] Preferably, a buckle structure is provided at the upper end of the sealing wall. In the present invention, the buckle structure is provided to lock the anti-leakage pad on the sealing base to fix the anti-leakage pad. The anti-leakage pad is usually used to prevent high-pressure gas from leaking along the pressure regulating column. The buckle structure is used to firmly install it in a preset position to ensure that it fits tightly with the sealing surface and maintains reliable sealing performance.

[0016] Since pneumatic equipment may be subject to vibration or impact during operation, the buckle structure can effectively prevent the stop-leak pad from moving or falling off due to these external forces, thereby ensuring the normal pressure control function of the pressure reducing valve throughout the entire working cycle. The buckle structure design also makes it more convenient and accurate to replace or readjust the stop-leak pad, which helps maintenance personnel to perform quick and effective maintenance.

[0017] A fixing column is also arranged below the sealing base, and the fixing column is integrally connected with the sealing base.

[0018] Preferably, the inner diameter of the stop-leak pad is the same as the diameter of the fixed column, and a circular ring-shaped cavity is provided at the center of the annular surface where the inner circle of the stop-leak pad is located. In the present invention, the pressure reducing valve can be helped to achieve pressure balance by providing a circular ring-shaped cavity at the center of the annular surface where the inner circle of the stop-leak pad is located. The presence of the circular ring-shaped cavity can help achieve pressure balance between the inside and outside of the valve when the valve is working, and reduce the instability or deviation of the valve core caused by the pressure difference. This cavity may be a key part of the pressure regulating column for pressure regulation. The movement of the valve core is controlled by adjusting the medium flow or pressure in the cavity, thereby changing the output pressure of the pressure reducing valve.

[0019] The pressure-regulating column sealing structure also includes a sealing shell, which is arranged in a cylindrical shape, and the bottom end of the sealing shell is arranged in an arc shape. A circular through hole is arranged on the top of the sealing shell, and the size of the circular through hole is consistent with the diameter of the upper end of the pressure-regulating column. A long rectangular pressure relief port is also arranged on the side of the sealing shell.

[0020] The height of the sealing shell is half of the height of the pressure regulating column, the bottom end of the sealing shell is in contact with the anti-leakage pad, and the pressure regulating column is embedded and connected with the sealing shell through the circular through hole at the upper end of the sealing shell.

[0021] The cavity can store a certain amount of gas or liquid, which plays a certain buffering role when the valve core moves, preventing the instantaneous pressure shock from damaging the valve body and seals, and helping to improve the sealing performance of the valve. For some pressure reducing valve designs that require lubrication or cooling functions, this cavity may also be used to hold lubricating oil or coolant to ensure that the valve core can operate smoothly and prevent overheating.

[0022] The beneficial effects of the utility model are as follows: a pressure regulating column sealing structure of a pneumatic pressure reducing valve is provided with a circular sealing base at the lower end of the column body of the pressure regulating column, and a circular anti-leakage pad is inlaid and installed on the sealing base. A sealing structure is formed by optimizing the lower end shape and angle of the anti-leakage pad, thereby achieving a good adaptive sealing effect, reducing wear, and thus ensuring the pressure control accuracy of the pressure reducing valve, improving work efficiency, and extending service life.

[0023] At the same time, the inlay design of the anti-leakage pad and the sealing base allows the position to be automatically adjusted when the pressure changes, ensuring a long-lasting and stable sealing effect. The anti-leakage pad itself also has a certain elastic deformation ability, which can deform under pressure and continuously apply pre-tightening force to the sealing ring, further enhancing the sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 Schematic diagram of the sealing structure of this practical embodiment;

[0025] Figure 2 It is a schematic diagram of the structure of the pressure regulating column of this practical embodiment;

[0026] Figure 3 Schematic diagram of the anti-leakage pad structure of this practical embodiment;

[0027] Figure 4 This is a schematic diagram of the overall structure of a pressure regulating column with a sealing shell in this practical embodiment;

[0028] Figure 5 It is a sectional view of the overall structure of the pressure regulating column with a sealing shell in this practical embodiment.

[0029] In the figure: 1. pressure regulating column, 2. anti-leakage pad, 3. sealing base, 4. sealing wall, 5. sealing shell. DETAILED DESCRIPTION

[0030] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0031] Embodiment 1

[0032] In this embodiment, if Figure 1 As shown, a pressure regulating column sealing structure of a pneumatic pressure reducing valve comprises a pressure regulating column 1 and a leak-proof pad 2 arranged in a circular shape, wherein the upper end of the leak-proof pad 2 serves as a sealing surface for starting the pressure reducing valve; the diameter of the upper end of the column body of the pressure regulating column 1 is slightly larger than the diameter of the middle part of the column body of the pressure regulating column 1 and the lower end of the column body of the pressure regulating column 1, and a sealing base 3 in a circular shape is also arranged at the lower end of the column body of the pressure regulating column 1, the sealing base 3 and the lower end of the column body of the pressure regulating column 1 are integrally connected, the sealing base 3 is located at two-fifths of the height of the column body of the pressure regulating column 1, and a fixing column protrudes from the connection between the sealing base 3 and the lower end of the column body of the pressure regulating column 1, and the diameter of the fixing column is the same as the diameter of the upper end of the column body of the pressure regulating column 1.

[0033] In this embodiment, if Figure 1 and Figure 3 As shown in the figure, the annular anti-leakage pad 2 passes through the upper end of the column of the pressure regulating column 1 and slowly moves downward, and is embedded and connected with the sealing base 3. When the pressure reducing valve is in working state, the pressure regulating column 1 moves downward, the crater of the pneumatic pressure reducing valve opens, and the buckle structure closes the anti-leakage pad 2 in the card slot, so that the anti-leakage pad 2 and the crater can be separated normally.

[0034] As a dynamic sealing element, the anti-leakage pad 2 can effectively prevent high-pressure gas from leaking from the main valve cavity through the gap between the pressure regulating column 1 and the valve body to the low-pressure side, thereby maintaining a stable output pressure after pressure regulation. Good sealing performance helps to improve the pressure setting accuracy and stability of the pressure reducing valve during operation, ensuring that the valve can accurately control the output pressure at the set pressure value. The anti-leakage pad 2 is usually made of wear-resistant, high-temperature resistant, and corrosion-resistant materials, which can withstand the pressure shock and temperature changes of the gas medium and extend the service life of the valve. When the sealing gasket needs to be replaced due to wear or damage due to long-term use, this inlaid connection design also facilitates maintenance personnel to quickly disassemble and maintain it.

[0035] In this embodiment, if Figure 3 As shown, a circular cavity is provided at the center of the annular surface where the inner circle of the circular anti-leakage pad 2 is located. Providing a circular cavity at the center of the annular surface where the inner circle of the anti-leakage pad 2 is located can help the pressure reducing valve achieve pressure balance. The existence of the circular cavity can help achieve pressure balance between the inside and outside of the valve when the valve is working, and reduce the instability or deviation of the valve core caused by the pressure difference. This cavity may be a key part when the pressure regulating column 1 is performing pressure regulation. The movement of the valve core is controlled by adjusting the medium flow or pressure in the cavity, thereby changing the output pressure of the pressure reducing valve.

[0036] In this embodiment, if Figure 2 and Figure 4 As shown, eight sealing walls 4 are provided at the edge of the sealing base 3, and the size and shape of each sealing wall 4 are the same, and the spacing distance between each sealing wall 4 is also the same. Such a design of multiple sealing walls 4 can provide a multi-stage sealing effect. Even if a seal fails due to wear or pressure fluctuation, other sealing walls 4 can continue to maintain basic sealing performance to prevent gas leakage. The design of the same sealing interval helps to evenly distribute the pressure of high-pressure gas when it passes through each sealing interval, thereby avoiding seal damage caused by local overpressure and improving the service life and reliability of the overall valve. Equal sealing intervals ensure that the contact between different sealing walls 4 is more balanced during the movement and adjustment of the pressure regulating column 1, reducing unnecessary friction and wear, which is conducive to ensuring the smoothness and accuracy of the pressure regulating action. Consistent sealing intervals help to standardize the production of parts, reduce manufacturing difficulty and cost, and are also conducive to precise alignment and positioning during assembly.

[0037] In this embodiment, if Figure 2 As shown, a snap-fit ​​structure is provided at the upper end of each sealing wall 4, which can fix the anti-leakage pad 2 on the sealing base 3. The anti-leakage pad 2 is usually used to prevent high-pressure gas from leaking along the pressure regulating column 1. The snap-fit ​​structure is used to firmly install it in a preset position to ensure that it fits tightly with the sealing surface and maintains reliable sealing performance.

[0038] Since pneumatic equipment may be subject to vibration or impact during operation, the buckle structure can effectively prevent the anti-leakage pad 2 from moving or falling off due to these external forces, thereby ensuring the normal pressure control function of the pressure reducing valve throughout the entire working cycle. The buckle structure design also makes the operation more convenient and accurate when the anti-leakage pad 2 needs to be replaced or readjusted, which helps maintenance personnel to perform quick and effective maintenance.

[0039] In this embodiment, if Figure 1 and Figure 2 As shown in common, a circular fixing seat is also provided at the end of the upper end of the pressure-regulating column 1, and the circular fixing seat and the upper end of the pressure-regulating column 1 are integrally connected; the upper end of the circular sealing base 3 and the contact surface of the anti-leakage pad 2 are also provided with an arc surface at a certain angle, and in order to achieve an inlaid connection, the lower end of the anti-leakage pad 2 is also provided with a certain arc surface, and the arc surface angles between the two are the same.

[0040] Embodiment 2

[0041] In this embodiment, if Figure 1 As shown, a pressure regulating column sealing structure of a pneumatic pressure reducing valve includes a pressure regulating column 1 whose upper end diameter is slightly larger than the column body diameter, and a sealing base 3 is also provided at the lower end of the pressure regulating column 1. The sealing base 3 is arranged in a circular shape and is integrally connected to the pressure regulating column 1.

[0042] The sealing structure of the pressure regulating column 1 also includes a leak-proof pad 2, and the leak-proof pad 2 is arranged on the sealing base 3. In the present invention, a sealing structure of a pressure regulating column of a pneumatic pressure reducing valve is provided with a circular sealing base 3 at the lower end of the column body of the pressure regulating column 1, and a ring-shaped leak-proof pad 2 is inlaid and installed on the sealing base 3. The sealing structure is formed by optimizing the shape and angle of the lower end of the leak-proof pad 2 to achieve a good adaptive sealing effect. The leak-proof pad 2 is made of high temperature resistant and wear-resistant materials, and has excellent pressure resistance and wear resistance. At the same time, its unique floating design enables it to automatically adjust its position when the pressure changes, ensuring that the sealing effect is long-lasting and stable. The leak-proof pad 2 itself also has a certain elastic deformation ability, which can produce deformation under the action of pressure and continuously apply pre-tightening force to the sealing ring, further enhancing the sealing performance.

[0043] In this embodiment, if Figure 1 and Figure 5 As shown, the anti-leakage pad 2 is provided in an annular shape and is embedded and connected with the sealing base 3. In the present invention, the annular anti-leakage pad 2 (also called a sealing pad or a sealing ring) is embedded and connected with the sealing base 3 on the pressure regulating column 1 of the pneumatic pressure reducing valve. The main function is to ensure the sealing of the pressure channel inside the valve body. The sealing base 3 is provided with an annular groove, and the annular groove is consistent with the shape of the lower end of the anti-leakage pad 2.

[0044] In this embodiment, if Figure 3 As shown, the anti-leakage pad 2, as a dynamic sealing element, can effectively prevent high-pressure gas from leaking from the main valve cavity through the gap between the pressure regulating column 1 and the valve body to the low-pressure side, thereby maintaining a stable output pressure after pressure regulation. Good sealing performance helps to improve the pressure setting accuracy and stability of the pressure reducing valve during operation, ensuring that the valve can accurately control the output pressure at the set pressure value. The anti-leakage pad 2 is usually made of wear-resistant and corrosion-resistant materials, which can withstand the pressure shock and temperature changes of the gas medium and extend the service life of the valve. When the sealing gasket needs to be replaced due to wear or damage due to long-term use, this inlaid connection design also facilitates maintenance personnel to quickly disassemble and maintain it.

[0045] In this embodiment, if Figure 2 As shown, a plurality of sealing walls 4 are arranged at the edge of the sealing base 3, and the sealing walls 4 are arranged in a row on the sealing base 3. In the present invention, the sealing walls 4 at the edge of the pressure regulating column 1 of the pneumatic pressure reducing valve can effectively enhance the sealing effect and improve the stability, and can also play a structural support and guiding function.

[0046] In the present invention, multiple points of contact and sealing are formed between the sealing wall 4 and the anti-leakage pad 2 or other corresponding matching parts, which effectively prevents gas from leaking axially from the inside of the valve body, ensuring the high sealing performance of the valve under different working conditions. Through the design of multiple sealing walls 4, the pressure load can be dispersed, so that the pressure borne by each sealing wall 4 is more uniform, thereby enhancing the stability and durability of the pressure reducing valve. The sealing wall 4 sometimes also plays a certain guiding role. When the pressure regulating column 1 moves up and down to adjust the pressure, it can ensure that the movement trajectory of the plunger is accurate and will not deviate, thereby ensuring the precise execution of the pressure regulating action. Multiple sealing walls 4 can provide better mechanical support for the pressure regulating column 1, prevent deformation or damage caused by uneven force, especially under working conditions such as high pressure difference and frequent adjustment, and maintain good mechanical properties.

[0047] In this embodiment, if Figure 2 and Figure 4As shown, sealing intervals of uniform width are provided between the sealing walls 4. In the present invention, sealing intervals of uniform width are provided between the sealing walls 4. Such a design of multiple sealing walls 4 can provide a multi-stage sealing effect. Even if a seal fails due to wear or pressure fluctuation, other sealing walls 4 can continue to maintain basic sealing performance to prevent gas leakage. The same design of each sealing interval helps to evenly distribute the pressure of high-pressure gas when it passes through each sealing interval, thereby avoiding seal damage caused by local overpressure and improving the service life and reliability of the overall valve. Equal sealing intervals ensure that the contact between different sealing walls 4 is more balanced during the movement and adjustment of the pressure regulating column 1, reducing unnecessary friction and wear, which is conducive to ensuring the smoothness and accuracy of the pressure regulating action. Consistent sealing intervals help to standardize the production of parts, reduce manufacturing difficulty and cost, and are also conducive to precise alignment and positioning during assembly.

[0048] In this embodiment, if Figure 1 and Figure 2 As shown in the figure, a buckle structure is provided at the upper end of the sealing wall 4. In the present invention, the buckle structure is provided to fix the anti-leakage pad 2 on the sealing base 3. The anti-leakage pad 2 is generally used to prevent high-pressure gas from leaking along the pressure regulating column 1. The buckle structure is used to firmly install it in a preset position to ensure that it fits tightly with the sealing surface and maintains reliable sealing performance.

[0049] Since pneumatic equipment may be subject to vibration or impact during operation, the buckle structure can effectively prevent the anti-leakage pad 2 from moving or falling off due to these external forces, thereby ensuring the normal pressure control function of the pressure reducing valve throughout the entire working cycle. The buckle structure design also makes the operation more convenient and accurate when the anti-leakage pad 2 needs to be replaced or readjusted, which helps maintenance personnel to perform quick and effective maintenance.

[0050] A fixing column is further provided below the sealing base 3 , and the fixing column is integrally connected to the sealing base 3 .

[0051] The inner diameter of the anti-leakage pad 2 is the same as the diameter of the fixed column, and a circular ring-shaped cavity is provided at the center of the annular surface where the inner circle of the anti-leakage pad 2 is located. In the present invention, the pressure reducing valve can be helped to achieve pressure balance by providing a circular ring-shaped cavity at the center of the annular surface where the inner circle of the anti-leakage pad 2 is located. The existence of the circular ring-shaped cavity can help achieve pressure balance between the inside and outside of the valve when the valve is working, and reduce the instability or deviation of the valve core caused by the pressure difference. This cavity may be a key part when the pressure regulating column 1 is performing pressure regulation. The movement of the valve core is controlled by adjusting the medium flow or pressure in the cavity, thereby changing the output pressure of the pressure reducing valve.

[0052] The pressure-regulating column sealing structure also includes a sealing shell, which is arranged in a cylindrical shape, and the bottom end of the sealing shell is arranged in an arc shape. A circular through hole is arranged on the top of the sealing shell, and the size of the circular through hole is consistent with the diameter of the upper end of the pressure-regulating column. A long rectangular pressure relief port is also arranged on the side of the sealing shell.

[0053] In this embodiment, if Figure 3 and Figure 5 As shown in the figure, the cavity can store a certain amount of gas or liquid, which plays a certain buffering role when the valve core moves, avoiding damage to the valve body and seals caused by instantaneous pressure shock, and helps to improve the sealing performance of the valve. For some pressure reducing valve designs that require lubrication or cooling functions, this cavity may also be used to hold lubricating oil or coolant to ensure that the valve core can operate smoothly and prevent overheating.

[0054] A pressure regulating column sealing structure of a pneumatic pressure reducing valve is provided with a circular sealing base 3 at the lower end of a pressure regulating column 1, and a circular anti-leakage pad 2 is inlaid and installed on the sealing base 3. A sealing structure is formed by optimizing the shape and angle of the lower end of the anti-leakage pad 2, thereby achieving a good adaptive sealing effect, reducing wear, and thus ensuring the pressure control accuracy of the pressure reducing valve, improving work efficiency, and extending the service life.

[0055] At the same time, the inlay design of the anti-leakage pad 2 and the sealing base 3 enables the position to be automatically adjusted when the pressure changes, ensuring a long-lasting and stable sealing effect. The anti-leakage pad 2 itself also has a certain elastic deformation ability, which can deform under pressure and continuously apply a pre-tightening force to the sealing ring to further enhance the sealing performance.

[0056] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

Claims

1. A pressure regulating column sealing structure of a pneumatic pressure reducing valve, characterized in that: It includes a pressure regulating column, and a sealing base is also arranged at the lower end of the pressure regulating column. The sealing base is arranged in a circular shape and is integrally connected with the pressure regulating column. The upper end diameter of the pressure regulating column body is larger than the middle part and the lower end diameter of the pressure regulating column body.

2. The pressure regulating column sealing structure of a pneumatic pressure reducing valve according to claim 1, characterized in that: The pressure regulating column sealing structure also includes a leakage-proof pad, which is arranged on the sealing base. The sealing base and the lower end of the pressure regulating column body are integrally connected, and the sealing base is located at two-fifths of the height of the pressure regulating column body.

3. The pressure regulating column sealing structure of a pneumatic pressure reducing valve according to claim 2, characterized in that: The anti-leakage pad is arranged in a circular ring shape and is embedded and connected with the sealing base.

4. The pressure regulating column sealing structure of a pneumatic pressure reducing valve according to claim 3, characterized in that: The sealing base is provided with an annular groove, which is consistent in shape with the lower end of the anti-leakage pad, and the upper end of the annular sealing base and the contact surface of the anti-leakage pad are also provided with an arc surface.

5. The pressure regulating column sealing structure of a pneumatic pressure reducing valve according to claim 1, characterized in that: 6-8 sealing walls are arranged at the edge of the sealing base, and the sealing walls are arranged in a row on the sealing base.

6. The sealing structure of the pressure regulating column of the pneumatic pressure reducing valve according to claim 5, characterized in that: Sealing gaps with the same width are arranged between the sealing walls.

7. A pressure regulating column sealing structure of a pneumatic pressure reducing valve according to claim 5 or 6, characterized in that: A buckle structure is arranged at the upper end of the sealing wall.

8. The pressure regulating column sealing structure of a pneumatic pressure reducing valve according to claim 3, characterized in that: A fixing column is also provided below the sealing base which is inlaid and connected with the anti-leakage pad, and the fixing column is integrally connected with the sealing base.

9. The pressure regulating column sealing structure of a pneumatic pressure reducing valve according to claim 8, characterized in that: The inner diameter of the anti-leakage pad is the same as the diameter of the fixing column, and a circular ring-shaped cavity is provided at the center of the annular surface where the inner circle of the anti-leakage pad is located.

10. The pressure regulating column sealing structure of a pneumatic pressure reducing valve according to claim 1, characterized in that: The pressure-regulating column sealing structure also includes a sealing shell, which is arranged in a cylindrical shape, and the bottom end of the sealing shell is arranged in an arc shape. A circular through hole is arranged on the top of the sealing shell, and the size of the circular through hole is consistent with the diameter of the upper end of the pressure-regulating column. A long rectangular pressure relief port is also arranged on the side of the sealing shell.

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