A wide-range self-balancing voltage regulator

Abstract

This invention discloses a wide-range self-balancing pressure regulator, comprising a valve body, a valve seat, a pressure regulating diaphragm, a valve stem assembly, and a pressure guide pipe. The valve stem assembly is axially movable and passes through the valve body and the valve seat. Its lower end valve cover is arranged on the same side as the air inlet channel. A sealing cover is provided in the valve body below the pressure regulating diaphragm. A balancing diaphragm is provided between the sealing cover and the valve body, forming a pressure action chamber through the sealing cover and the balancing diaphragm. A pressure introduction channel is opened inside the valve stem assembly, connecting the air inlet channel and the pressure action chamber. The pressure introduction channel introduces the upstream air inlet pressure into the pressure action chamber, counteracting the upward force of the air inlet pressure on the valve cover, effectively reducing the opening and closing resistance of the valve stem assembly, and avoiding jamming failure under high pressure conditions. The pressure regulator of this invention, with this structural design, can maintain stable operation under high flow and high pressure differential conditions, has excellent operating condition adaptability and pressure regulating performance, and improves valve operation stability, pressure regulating accuracy, and flow capacity.

Description

Technical Field

[0001] This invention relates to the field of valve technology, and more specifically to a wide-range self-balancing pressure regulator. Background Technology

[0002] Pressure regulating valves are core pressure stabilizing components in gas transmission and distribution and industrial fluid control systems. Their core function is to maintain the downstream outlet pressure within a set range by automatically adjusting the flow rate of the medium passing through the valve port.

[0003] Depending on the application requirements, the gas passage design of existing pressure regulating valves mainly falls into two categories: One conventional form involves the valve disc and the inlet channel being located on opposite sides of the valve port. For example, the gas pressure regulating valve disclosed in Chinese patent document CN216447495U adopts this conventional structure. Its vent valve port is located between the inlet and outlet ports, the third sealing valve disc (collectively referred to as the valve disc) is located downstream of the vent valve port, and the inlet channel is located upstream of the vent valve port. An elastic diaphragm is used to separate the pulse chamber from the gas passage, with a portion of it located directly above the inlet channel. Based on the inlet pressure acting on the upstream side of the valve port, the valve... The pressure exerted by the diaphragm during opening and closing is relatively small, but it is clearly insufficient for handling high flow rates and high inlet pressure conditions. Because part of the diaphragm is directly exposed to the high-pressure environment of the inlet channel, the high inlet pressure will directly act on the pressure regulating diaphragm to form an upward thrust, while the pressure regulating spring will apply a downward preload to the diaphragm. The dynamic confrontation between the two opposing forces leads to unstable diaphragm displacement, and the valve opening fluctuates, making it difficult to achieve stable control of a large opening. Furthermore, the repeated impact and alternating stress of the high-pressure airflow on the diaphragm can easily cause diaphragm fatigue damage and shorten the service life of the equipment.

[0004] To address the issues of diaphragm damage and unstable valve opening under high flow and high pressure conditions in conventional structures, an improved air passage design has been developed: the air inlet channel and valve disc are located on the same side of the valve port. In this structure, the inlet pressure acts directly on the valve disc instead of the regulating diaphragm, effectively reducing diaphragm fatigue damage and allowing for a larger valve opening, suitable for high flow gas supply scenarios. However, this structure also introduces new problems: the inlet pressure acts directly on the valve disc's pressure-bearing surface, creating an additional closing force opposite to the valve's opening direction. This significantly increases the total resistance the valve disc needs to overcome to open, easily leading to valve jamming and failure under high pressure conditions. This results in an inability to stably maintain the outlet pressure, affecting the normal operation of gas-using equipment and exhibiting poor adaptability to operating conditions. Therefore, a new pressure regulating valve structure that can overcome these defects is urgently needed to improve the operating condition adaptability, operational stability, and pressure regulation accuracy of the pressure regulating valve. Summary of the Invention

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the problem that the pressure regulating valve with the same side air intake structure in the prior art is difficult to open under high pressure conditions, the working pressure range is limited, the working condition adaptability is poor, and the normal operation of the gas-using equipment is affected by the additional closing force generated by the air intake pressure on the valve disc.

[0006] To address the aforementioned problems, this invention provides a wide-range self-balancing pressure regulator, comprising a valve body, a valve seat, a pressure regulating diaphragm, a valve stem assembly, and a pressure guiding pipe. The pressure regulating diaphragm is disposed within the valve body and divides the internal space of the valve body into an upper pressure chamber and a lower pressure chamber. The valve seat has an internal air passage structure, including an air inlet channel, an air outlet channel, and a valve port connecting the two. The valve stem assembly is axially movable within the valve body and valve seat, with its upper end linked to the pressure regulating diaphragm and its lower end having a valve disc for opening and closing the valve port. The valve disc is located below the valve port and arranged on the same side as the air inlet channel. The lower pressure chamber is connected to the downstream outlet of the air outlet channel via the pressure guiding pipe. A sealing cover is fixedly installed inside the valve body below the pressure regulating diaphragm. The valve stem assembly passes through the sealing cover axially. A balance diaphragm is provided between the sealing cover and the valve body to form a sealed linkage with the valve stem assembly. The balance diaphragm and the sealing cover together form a pressure acting chamber. The pressure acting chamber is axially sealed and isolated between the pressure chamber and the air outlet channel. A pressure introduction channel is provided inside the valve stem assembly. The inlet end of the pressure introduction channel is connected to the air inlet channel, and its outlet end is connected to the pressure acting chamber.

[0007] As a preferred embodiment, the valve body has a through-hole axially opposite to the valve port. A sealing cover surrounds the end of the through-hole facing the pressure regulating diaphragm. The outer edge of the balancing diaphragm is clamped and fixed between the upper end face of the sealing cover and the through-hole. The valve stem assembly passes through the sealing cover, the through-hole, and the valve port sequentially along the axial direction and is linked with the inner edge of the balancing diaphragm. The top of the sealing cover forms part of the bottom surface of the pressure chamber and axially supports and separates the pressure chamber from the pressure acting chamber, which is located at one end of the through-hole. When intake pressure is introduced into the pressure acting chamber, the balancing diaphragm undergoes elastic deformation towards the through-hole to drive the valve stem assembly to generate a downward axial thrust.

[0008] As a preferred embodiment, the valve stem assembly includes a valve stem, an intermediate sleeve, a guide rod, and a valve disc connected sequentially along the axial direction. The valve stem is linked to the pressure regulating diaphragm, and the valve disc is fixedly connected to the lower end of the guide rod. The pressure introduction channel is a multi-segment sealed flow path formed inside the valve stem, the intermediate sleeve, and the guide rod, as well as in the mating gaps.

[0009] As a preferred embodiment, the pressure introduction channel includes a first pressure-inducing flow path, a second pressure-inducing flow path, and a third pressure-inducing flow path connected in sequence; The first pressure-guiding flow path is axially extended through the air guide rod, and it has a pressure inlet formed at the lower end of the air guide rod, which is connected to the air intake channel; The second pressure-guiding flow path extends axially and is opened inside the intermediate sleeve rod, and is connected to the upper end of the first pressure-guiding flow path; The third pressure-guiding flow path is a multi-directional bent flow channel formed by the intersection of an axial section and at least one radial section, and is formed inside the valve stem; the axial section of the third pressure-guiding flow path is connected to the upper end of the second pressure-guiding flow path, and the radial section of the third pressure-guiding flow path extends radially along the valve stem and forms at least one pressure outlet on the side wall of the valve stem, and the pressure outlet is connected to the pressure-acting chamber.

[0010] As a preferred embodiment, one end of the intermediate sleeve is provided with a groove hole that opens toward the pressure chamber. The groove hole is connected to the upper opening of the second pressure-guiding flow path. The third pressure-guiding flow path has an L-shaped structure, a T-shaped structure, or a multi-cross structure. The radial section of the third pressure-guiding flow path is connected to the pressure chamber through the groove hole.

[0011] As a preferred embodiment, the sealing cover has a concave structure, with a hollow guide post extending axially downward at the center of the cover. The valve stem passes through the hollow guide post axially, and at least one sealing ring is provided between the inner wall of the hollow guide post and the outer wall of the valve stem to form a sliding sealing fit between the valve stem and the sealing cover.

[0012] As a preferred embodiment, the outer peripheral sidewall of the intermediate sleeve is provided with an annular engaging groove, and the inner edge of the balancing diaphragm is fixedly embedded in the annular engaging groove, forming a coaxial linkage with the intermediate sleeve.

[0013] As a preferred embodiment, the valve stem, the intermediate sleeve, the air guide rod, and the valve disc are all detachably and fixedly connected to each other.

[0014] As a preferred embodiment, the detachable fixed connection is a threaded connection structure, comprising: a first threaded opening at the upper end of the intermediate sleeve rod, a first threaded connector at the lower end of the valve stem and mating with the first threaded opening, a second threaded opening at the lower end of the intermediate sleeve rod, a second threaded connector at the upper end of the air guide rod and mating with the second threaded opening, and a third threaded connector at the lower end of the air guide rod. The valve disc is threadedly locked to the third threaded connector, and both ends of the second pressure-guiding flow path extend through the second threaded connector and the third threaded connector.

[0015] As a preferred embodiment, the valve disc includes an upper clamping pad, a valve disc sealing pad, and a lower clamping pad. The valve disc sealing pad mates with the lower end face of the valve port and is clamped between the upper clamping pad and the lower clamping pad. A step is provided on the third threaded section of the air guide rod. The upper clamping pad abuts against the step, and the lower clamping pad is screwed onto the third threaded section by a threaded engagement, thereby clamping and fixing the valve disc sealing pad between the upper clamping pad and the lower clamping pad.

[0016] As a preferred embodiment, the upper pressure chamber is provided with a pressure regulating spring that abuts against the pressure regulating diaphragm. The pressure regulating diaphragm includes a working diaphragm, an upper diaphragm plate, and a lower diaphragm plate. The upper and lower diaphragm plates are fixedly connected to the valve stem in the central region, clamping the working diaphragm between them. A safety diaphragm is also covered on the upper side of the upper diaphragm plate. The safety diaphragm and the outer edge of the working diaphragm are fixedly connected to the valve body. As another preferred embodiment, the top of the valve body is formed with a positioning cavity that extends axially and connects to the upper pressure chamber. The positioning cavity is provided with an adjustment mechanism consisting of a pressure regulating spring, a spring washer, and an adjusting nut. The adjusting nut is movably and adjustablely disposed in the positioning cavity via a thread. The upper end of the pressure regulating spring abuts against the adjusting nut through the spring washer, and its lower end abuts against the central positioning block of the safety diaphragm. The preload applied by the pressure regulating spring to the pressure regulating diaphragm is adjusted by turning the adjusting nut.

[0017] The technical solution of the present invention has the following advantages compared with the prior art: 1. In the wide-range self-balancing pressure regulator provided by the present invention, a sealed cover and a balancing diaphragm are set in the valve body to form a closed pressure action chamber, and the intake pressure is introduced into the chamber through a pressure introduction channel opened inside the valve stem assembly. The air pressure transmission path is short and the adjustment response is rapid. Through the sealed linkage between the balancing diaphragm and the valve stem assembly, the balancing diaphragm elastically deforms under the action of the intake pressure and generates a downward axial thrust on the valve stem assembly. This thrust can at least partially offset the upward force exerted by the intake pressure on the valve disc, greatly reducing the opening resistance of the valve stem assembly and ensuring smooth axial movement of the valve stem assembly without jamming. Since the pressure action chamber is axially sealed and isolated between the lower pressure chamber and the outlet channel, it can prevent the intake pressure from being directly... Impact or excessive force on the pressure regulating diaphragm reduces the risk of fatigue damage to the diaphragm and effectively prevents mutual interference between pressures in multiple chambers, ensuring stable air pressure within the pressure chamber and improving the accuracy of pressure regulation. By employing the above-mentioned structure in synergy, the problems of excessive opening and closing resistance and easy valve jamming and failure under high-pressure conditions caused by the existing valve disc and air intake channel being arranged on the same side are solved. At the same time, the alternating impact and fatigue damage of high-pressure airflow on the pressure regulating diaphragm are eliminated, significantly widening the pressure regulation range. It has the advantages of compact structure, low cost, and high reliability, enabling the pressure regulator to maintain stable operation under high flow and high pressure differential conditions. It has excellent operating condition adaptability and pressure regulation performance, significantly improving valve operation stability, pressure regulation accuracy and flow capacity, and extending valve service life.

[0018] 2. In the wide-range self-balancing pressure regulator provided by this invention, the sealing cover and the balancing diaphragm are fitted together at the end of the valve body opening facing the pressure regulating diaphragm. The valve stem assembly passes through the sealing cover, the valve body opening and the valve port in sequence along the axial direction, and forms a linkage with the balancing diaphragm. This structural layout integrates the pressure-acting chamber into the axial space between the pressure regulating diaphragm and the valve body opening, making full use of the internal space of the valve body, achieving a compact structural design, reducing the overall volume of the valve, improving space utilization, and significantly shortening the path length of the pressure introduction channel formed inside the valve stem. This is beneficial for the rapid response of the intake pressure and the establishment of dynamic balance. The axial layout of this pressure regulator, while achieving a compact structure and convenient assembly, further optimizes the valve stem stress state and gas path response performance, enhancing its operational stability under a wide range of pressure regulation conditions.

[0019] 3. In the wide-range self-balancing pressure regulator provided by this invention, the valve stem assembly adopts a combined structure in which the valve stem, intermediate sleeve, air guide rod, and valve disc are connected sequentially along the axial direction. A pressure introduction channel consisting of first, second, and third pressure-inducing flow paths is formed sequentially inside the air guide rod, intermediate sleeve, and valve stem. By adopting the above-mentioned combined valve stem and segmented pressure-inducing air path design, the pressure introduction channel is completely integrated inside the valve stem assembly, eliminating the need for external pressure-inducing pipelines and avoiding the leakage risk of external pipelines. This achieves fully internal, segmented, sealed transmission of intake pressure to the pressure action chamber, significantly improving the air path sealing performance and operational reliability. Furthermore, the segmented processing and separate forming of the valve stem assembly and flow path greatly reduces the processing difficulty of the slender pressure-inducing channel, effectively improving processing accuracy and production assembly efficiency, facilitating later maintenance, repair, and component replacement. The combined valve stem and segmented pressure-inducing channel work together to improve the operating stability and pressure regulation response performance of the pressure regulator.

[0020] 4. In the wide-range self-balancing pressure regulator provided by this invention, the third pressure-inducing flow path adopts an L-shaped, T-shaped, or multi-cross-shaped multi-directional bending structure with axial and radial intersections. By providing a groove hole with an opening facing the pressure-acting chamber at one end of the intermediate sleeve, the radial section of the third pressure-inducing flow path is connected to the pressure-acting chamber through the groove hole. The advantages of this design are: First, the groove hole forms an annular connecting space around the valve stem, which can accommodate the circumferential angular deviation caused by the screwing angle during the thread assembly of the valve stem and the intermediate sleeve, greatly reducing the assembly accuracy requirements and improving manufacturing tolerance and yield. Second, the groove hole increases the flow cross-sectional area and buffer volume of the airflow, giving it airflow buffering and pressure equalization functions. It can smooth inlet pressure fluctuations, reduce local flow resistance, and ensure that the circumferential force of the balancing diaphragm is uniform and the deformation is stable, thereby achieving a reliable, uniform, and stable built-in pressure-inducing effect.

[0021] 5. In the wide-range self-balancing pressure regulator provided by this invention, the valve stem, intermediate sleeve rod, air guide rod, and valve disc are detachably connected via a threaded structure. This segmented threaded connection design, as the core structural form of the valve stem assembly, has the following advantages: First, by decomposing the long valve stem into multiple independent short parts, the machining difficulty of complex structures such as deep holes and bent flow channels in the internal pressure introduction channel is significantly reduced, effectively controlling the machining tolerance of each flow channel and improving the forming accuracy and production yield of the parts; Second, the coaxial connection of each component via threads ensures the coaxiality and straightness of the valve stem assembly as a whole. Simultaneously, the pressure introduction channel runs through each threaded connection segment, and the end-face clamping force generated by tightening the threads can reliably seal adjacent air passage interfaces, ensuring continuous and unobstructed airflow; Third, this valve stem assembly utilizes the detachable characteristics of the threaded connection, eliminating the need to replace the entire valve stem assembly, significantly reducing maintenance costs and replacement difficulty, and lowering manufacturing costs.

[0022] 6. In the wide-range self-balancing pressure regulator provided by the present invention, the valve stem assembly is composed of a valve stem, an intermediate sleeve rod, and a guide rod. The valve stem, as the upper power transmission component, is directly linked with the pressure regulating diaphragm to accurately transmit the pressure regulating driving force. At the same time, it has a built-in pressure outlet channel to achieve stable delivery of intake pressure to the pressure action chamber. The intermediate sleeve rod, as the core connecting carrier of the middle section, not only realizes the coaxial docking of the valve stem and the guide rod, but also serves as a dedicated mounting base for the inner edge of the balancing diaphragm, enabling the balancing diaphragm and the valve stem assembly to move axially synchronously, ensuring the real-time and effective pressure balancing effect. The guide rod, as the lower pressure acquisition and execution connection component, has a built-in intake pressure channel that can directly acquire high-pressure air from the intake channel. By driving the deformation action of the balancing diaphragm, it helps to reduce the opening resistance of the valve stem assembly. At the same time, a threaded section is provided at the lower end of the guide rod to provide a standardized and high-precision installation and locking foundation for the valve disc. Attached Figure Description

[0023] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below.

[0024] Figure 1 A schematic cross-sectional view of the wide-range self-balancing voltage regulator provided by the present invention; Figure 2 for Figure 1 The diagram shows a partially enlarged structure of the voltage regulator. Figure 1 ; Figure 3 for Figure 1 The diagram shows a partially enlarged structure of the voltage regulator. Figure 2 ; Figure 4 This is a schematic diagram showing the connection between the valve stem assembly and the balance diaphragm of the present invention; Figure 5 This is a schematic diagram of the valve stem assembly of the present invention.

[0025] Explanation of reference numerals in the attached drawings: 1. Valve body; 10. Pressure guide pipe; 11. Upper pressure chamber; 12. Lower pressure chamber; 13. Port; 2. Valve seat; 21. Inlet passage; 22. Outlet passage; 23. Valve port; 3. Pressure regulating diaphragm; 31. Working diaphragm; 32. Upper diaphragm plate; 33. Lower diaphragm plate; 34. Safety diaphragm; 4. Valve stem assembly; 41. Valve stem; 42. Intermediate sleeve rod; 43. Air guide rod; 44. Groove hole; 45. First threaded connector; 46. Second threaded connector; 47. Third threaded connector; 5. Valve disc; 51. Upper clamping pad; 52. Valve disc sealing gasket; 53. Lower clamping pad; 6. Pressure introduction channel; 61. First pressure inlet path; 62. Second pressure inlet path; 63. Third pressure inlet path; 631. Axial section; 632. Radial section; 7. Sealing cover; 71. Hollow guide post; 72. Sealing ring; 8. Balance diaphragm; 9. Pressure acting chamber; 100. Pressure adjusting spring; 101. Spring washer; 102. Adjusting nut. Detailed Implementation

[0026] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0027] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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 invention based on the specific circumstances.

[0029] Example The following is combined Figures 1-5A wide-range self-balancing pressure regulator of the present invention will be described in detail. The wide-range self-balancing pressure regulator of this embodiment includes a valve body 1, a valve seat 2, a pressure regulating diaphragm 3, a valve stem assembly 4, and a pressure guiding pipe 10. The pressure regulating diaphragm 3 is disposed inside the valve body 1 and divides the internal space of the valve body 1 into an upper pressure chamber 11 and a lower pressure chamber 12. The valve seat 2 has an internal air passage structure, which includes an air inlet channel 21, an air outlet channel 22, and a valve port 23 connecting the two. The valve stem assembly 4 is axially movably inserted into the valve body 1 and the valve seat 2. Its upper end is linked with the pressure regulating diaphragm 3, and its lower end is provided with a valve disc 5 for opening and closing the valve port 23. In particular, the valve disc 5 is located on the lower side of the valve port 23 and arranged on the same side as the air inlet channel 21. That is, the air inlet channel 21 and the valve disc 5 are distributed on the lower side of the valve port, and the air outlet channel is distributed on the upper side of the valve port. This structure can avoid the air inlet pressure directly impacting the pressure regulating diaphragm 3 and is suitable for high flow conditions. The lower pressure chamber 12 is connected to the air outlet channel 22 through the pressure guide pipe 10 and is used to feed back the downstream outlet pressure to the lower pressure chamber 12. This is the basic circuit for realizing automatic pressure stabilization.

[0030] To address the issue of the additional closing force exerted by the intake pressure on the valve disc in the same-side structure, which makes it difficult to open the valve disc or even cause it to jam under high pressure, a sealing cover 7 is fixedly installed inside the valve body 1, located below the pressure regulating diaphragm 3. The valve stem assembly 4 passes through the sealing cover 7 axially. A balance diaphragm 8 is provided between the sealing cover 7 and the valve body 1, forming a sealed linkage with the valve stem assembly 4. The balance diaphragm 8 and the sealing cover 7 together form a pressure acting chamber 9, which is axially sealed and isolated between the pressure chamber 12 and the outlet channel 22. A pressure introduction channel 6 is provided inside the valve stem assembly 4. The inlet end of the pressure introduction channel 6 is connected to the intake channel 21, and its outlet end is connected to the pressure acting chamber 9. The balancing diaphragm 8 undergoes elastic deformation under the intake pressure introduced into the pressure chamber 9 by the pressure introduction channel 6, and drives the valve stem assembly 4 to generate a downward axial thrust, so as to at least partially offset the upward force exerted by the intake pressure on the valve disc 5, thereby making the two forces basically balanced, so that the intake pressure no longer becomes a factor that hinders the opening of the valve.

[0031] The above-described implementation method is the core technical solution of this embodiment. By setting a sealing cover 7 and a balance diaphragm 8 inside the valve body 1 to form a closed pressure action chamber 9, and using the pressure introduction channel 6 opened inside the valve stem assembly 4 to introduce the intake pressure into this chamber, the air pressure transmission path is short and the adjustment response is rapid. Through the sealed linkage formed between the balance diaphragm 8 and the valve stem assembly 4, the balance diaphragm 8 elastically deforms under the action of the intake pressure and generates a downward axial thrust on the valve stem assembly 4. This thrust can at least partially offset the upward force exerted by the intake pressure on the valve disc 5, greatly reducing the opening resistance of the valve stem assembly and ensuring that the axial movement of the valve stem assembly 4 is smooth and without jamming. Since the pressure action chamber 9 is axially sealed and isolated between the lower pressure chamber 12 and the outlet channel 22, it can prevent the intake pressure from entering the valve stem assembly. The air pressure no longer directly impacts or excessively acts on the pressure regulating diaphragm 3, reducing the risk of fatigue damage to the diaphragm and effectively preventing mutual interference between multi-chamber pressures. This ensures stable air pressure within the pressure chamber 9, improving the accuracy of pressure regulation. By employing the above-mentioned structure in synergy, the problems of excessive opening and closing resistance and easy valve jamming and failure under high-pressure conditions caused by the existing valve disc 5 and air inlet channel 21 being arranged on the same side are solved. At the same time, the alternating impact and fatigue damage of high-pressure airflow on the pressure regulating diaphragm are eliminated, significantly widening the pressure regulation range. It has the advantages of compact structure, low cost, and high reliability, enabling the pressure regulator to maintain stable operation under high flow and high pressure differential conditions. It has excellent operating condition adaptability and pressure regulation performance, improving the operating stability, pressure regulation accuracy, and flow capacity of the pressure regulator, and extending the service life of the valve.

[0032] Based on the above structure, such as Figures 1-3As shown, the valve body 1 has a through-hole 13 axially opposite to the valve port 23. The sealing cover 7 surrounds the end of the through-hole 13 facing the pressure regulating diaphragm 3. The outer edge of the balancing diaphragm 8 is clamped and fixed between the upper end face of the sealing cover 7 and the through-hole 13. The valve stem assembly 4 passes through the sealing cover 7, the through-hole 13, and the valve port 23 sequentially along the axial direction and is linked with the inner edge of the balancing diaphragm 8. This coaxial alignment arrangement ensures that the valve stem assembly 4, the pressure regulating diaphragm 3, the balancing diaphragm 8, and the valve port 23 are all on the same axial centerline, resulting in higher force transmission efficiency and more sensitive valve adjustment response. The top of the sealing cover 7 forms part of the bottom surface of the pressure chamber 12 and axially supports and separates the pressure chamber 12 from the pressure acting chamber 9. The pressure acting chamber 9 is located at one end of the through-hole 13. When the pressure chamber 9 introduces intake pressure, the balancing diaphragm 8 undergoes elastic deformation toward the port 13, driving the valve stem assembly 4 to generate a downward axial thrust. The port 13 refers to an axial through hole located above the valve port 23 inside the valve body. This structural layout integrates the pressure chamber 9 within the axial space between the pressure regulating diaphragm 3 and the valve body port, making full use of the internal space of the valve body, achieving a compact design, reducing the overall valve volume, and improving space utilization. At the same time, it significantly shortens the path length of the pressure introduction channel formed inside the valve stem, which is beneficial for rapid response and dynamic balance establishment of intake pressure. The axial layout of this pressure regulator, while achieving a compact structure and convenient assembly, optimizes the stress state of the valve stem and the air path response performance, enhancing the operational stability of the pressure regulator under a wide range of pressure regulation conditions.

[0033] The following is combined Figures 2-4 The specific configuration of the valve stem assembly and pressure inlet channel is described in detail: The valve stem assembly 4 includes a valve stem 41, an intermediate sleeve 42, an air guide rod 43, and a valve disc 5 connected sequentially along the axial direction. The upper end of the valve stem 41 is linked with the pressure regulating diaphragm 3, and the valve disc 5 is fixedly connected to the lower end of the air guide rod 43. The pressure introduction channel 6 is not a single channel, but a multi-segment sealed flow path formed inside the valve stem 41, the intermediate sleeve 42, and the air guide rod 43 and in the fitting gap. Specifically, the pressure introduction channel 6 includes a first pressure-inducing flow path 61, a second pressure-inducing flow path 62, and a third pressure-inducing flow path 63 connected sequentially. The first pressure-guiding flow path 61 is axially penetrating within the air guide rod 43, and has a pressure inlet formed at the lower end of the air guide rod 43, which is connected to the air intake channel 21. The second pressure-guiding flow path 62 extends axially within the intermediate sleeve rod 42 and is connected to the upper end of the first pressure-guiding flow path 61. The third pressure-guiding flow path 63 is a multi-directional bent flow channel formed by the intersection of an axial section 631 and at least one radial section 632, and is formed within the valve stem 41. The axial direction of the third pressure-guiding flow path 63... Section 631 is connected to the upper end of the second pressure-guiding flow path 62. The radial section 632 of the third pressure-guiding flow path 63 extends radially along the valve stem and forms at least one pressure outlet on the side wall of the valve stem 41. The pressure outlet is connected to the pressure action chamber 9. This multi-segment sealed flow path forms a sealed connection through the assembly of the valve stem assembly. The air pressure transmission path is short and the flow resistance is small, which can realize real-time synchronous feedback of the intake pressure. Thus, the intake pressure in the intake channel 21 can be transmitted to the pressure action chamber 9, ensuring sensitive and efficient pressure balance regulation. In this structural configuration, the valve stem assembly 4 adopts a combined structure in which the valve stem 41, intermediate sleeve 42, air guide rod 43, and valve disc 5 are connected axially in sequence. A pressure introduction channel 6, consisting of a first pressure-inducing flow path 61, a second pressure-inducing flow path 62, and a multi-directionally bent third pressure-inducing flow path 63, is formed sequentially inside the air guide rod, intermediate sleeve rod, and valve stem. By employing the aforementioned combined valve stem and segmented pressure-inducing channel design, the pressure introduction channel 6 is completely integrated inside the valve stem assembly 4, eliminating the need for external pressure-inducing pipelines and avoiding the risk of leakage from external pipelines. This design achieves fully integrated, segmented sealed transmission of intake pressure to the pressure chamber 9, significantly improving the air circuit sealing and operational reliability. Secondly, by utilizing segmented processing of the valve stem assembly and separate forming of the flow channel, the processing difficulty and tolerance control requirements of the slender pressure-sensing channel are greatly reduced. Each component can be processed independently and then assembled, effectively improving processing accuracy and production assembly efficiency, and facilitating later maintenance, repair, and component replacement. The combined valve stem and segmented pressure-sensing channel work together to improve the operating stability and pressure regulation response performance of the pressure regulator.

[0034] To further improve the reliability of the connection between the third pressure-guiding flow path 63 and the pressure-acting chamber 9 and optimize the airflow state, one end of the intermediate sleeve 42 is provided with a groove hole 44 opening towards the pressure-acting chamber 9. This groove hole 44 is connected to the upper opening of the second pressure-guiding flow path 62. The third pressure-guiding flow path 63 has an L-shaped structure, a T-shaped structure, or a multi-cross structure. The radial section 632 of the third pressure-guiding flow path 63 is connected to the pressure-acting chamber 9 through the groove hole 44. The third pressure-guiding flow path 63 has one radial exit path when it adopts an L-shaped structure, and multiple radial exit paths when it adopts a T-shaped structure or a multi-cross structure. The advantage of this structural design is that, firstly, the groove hole 44 forms an annular connecting space around the valve stem 41, which is suitable for the valve stem. The circumferential angular deviation caused by the engagement angle during the threaded assembly of 41 and the intermediate sleeve rod 42 significantly reduces the assembly accuracy requirements, improves manufacturing tolerance and yield. Secondly, the increased cross-sectional area and buffer volume of the airflow through the groove hole 44 enable it to have airflow buffering and pressure equalization functions, which can smooth the intake pressure fluctuations, reduce local flow resistance, accelerate pressure response, and prevent high-pressure airflow from directly impacting the balance diaphragm 8, ensuring that the balance diaphragm 8 is subjected to uniform circumferential force and stable deformation. Thirdly, based on the multi-structure design of the third pressure-inducing flow path, the optimal flow channel configuration can be flexibly selected according to different pressure regulation flow rates and pressure conditions, taking into account both processing convenience and pressure distribution uniformity, improving the product's adaptability to operating conditions. The above structural settings achieve a reliable, uniform, and stable built-in pressure-inducing effect.

[0035] Further optimized settings, such as Figure 2 As shown, the sealing cover 7 has a concave structure. A hollow guide post 71 extending axially downward is formed at the center of the cover. The valve stem 41 passes through the hollow guide post 71 axially. At least one sealing ring 72 is provided between the inner wall of the hollow guide post 71 and the outer wall of the valve stem 41 to form a sliding seal between the valve stem 41 and the sealing cover 7. This structure realizes the integrated design of guiding the valve stem 41 and sealing the upper part of the pressure chamber 9. The hollow guide post 71, as a long-span guide support structure, provides precise axial guidance for the valve stem 41, ensuring that the valve stem remains aligned with the valve body axis during axial movement, effectively preventing radial wobble and movement jamming, and significantly improving the smoothness of valve stem movement and dynamic response performance.

[0036] The balancing diaphragm 8 is installed using an outer edge clamping and inner edge engaging method: its outer edge is clamped and fixed between the upper end face of the sealing cover 7 and the through-hole 13, and the installation pre-tightening force of the sealing cover 7 achieves a fastener-free seal, with uniform force on the sealing surface; the outer peripheral side wall of the intermediate sleeve 42 is provided with an annular engaging groove, and the inner edge of the balancing diaphragm 8 is fixedly embedded in the annular engaging groove, forming a coaxial linkage with the intermediate sleeve 42. This installation method ensures synchronous axial displacement of the balancing diaphragm 8 and the valve stem assembly 4, and also allows the deformation of the balancing diaphragm 8 to occur axially, ensuring balanced force and stable deformation of the pressure regulating diaphragm, making installation simple and reliable.

[0037] The following is combined Figures 1-2 , Figure 4 The specific installation method of the valve stem assembly 4 is described in detail: the valve stem 41, the intermediate sleeve 42, the air guide rod 43, and the valve disc 5 are all detachably fixedly connected to each other. In a preferred embodiment, the detachable fixed connection is a threaded connection structure, comprising: a first threaded opening at the upper end of the intermediate sleeve 42, a first threaded connector 45 at the lower end of the valve stem 41 and mating with the first threaded opening, a second threaded opening at the lower end of the intermediate sleeve 42, a second threaded connector 46 at the upper end of the air guide rod 43 and mating with the second threaded opening, and a third threaded connector 47 at the lower end of the air guide rod 43. The valve disc 5 is threadedly locked to the third threaded connector 47, and both ends of the second pressure-guiding flow path 62 extend through the second threaded connector 46 and the third threaded connector 47. In summary, the valve stem 41, intermediate sleeve 42, air guide rod 43, and valve disc 5 are detachably connected via a multi-stage threaded structure. This segmented threaded connection design, as the core structural form of the valve stem assembly 4, has the following advantages: First, it decomposes the originally integral long valve stem 41 into multiple independent short parts, significantly reducing the machining difficulty of complex structures such as deep holes and bent flow channels in the internal pressure introduction channel 6, effectively controlling the machining tolerances of each flow channel, and improving the forming accuracy and production yield of parts; Second, the coaxial connection of each component via threads ensures the overall coaxiality and straightness of the valve stem assembly 4. The linearity is such that the pressure inlet channel 6 runs through each threaded connection section. The end face clamping force generated by tightening the threads can achieve reliable sealing of adjacent air passage interfaces without the need for additional sealing elements, ensuring continuous and unobstructed air passage and lossless pressure transmission. Furthermore, this valve stem assembly 4 utilizes the detachable characteristics of the threaded connection, allowing any component in the valve stem assembly to be disassembled and replaced individually when it is worn or fails, without having to replace the entire valve stem assembly. This significantly reduces maintenance costs and replacement difficulty. This threaded connection structure is easy to assemble, has a firm connection, improves the versatility and interchangeability of parts, and reduces manufacturing costs.

[0038] As can be seen from the structural design of the valve stem assembly 4, the valve stem 41, as the upper power transmission component, is directly linked with the pressure regulating diaphragm 3 to accurately transmit the pressure regulating driving force. At the same time, it has a built-in pressure outlet channel to achieve stable delivery of intake pressure to the pressure action chamber 9. The intermediate sleeve 42, as the core connecting carrier of the middle section, not only realizes the coaxial docking of the valve stem 41 and the air guide rod 43 to ensure the overall coaxiality of the valve stem assembly 4, but also serves as a dedicated mounting base for the inner edge of the balance diaphragm 8, so that the balance diaphragm 8 and the valve stem assembly 4 can move axially synchronously to ensure the real-time effectiveness of the pressure balance. The air guide rod 43, as the lower pressure acquisition and execution connection component, has a built-in intake pressure channel that can directly acquire high-pressure air from the intake channel 21. By driving the deformation action of the balance diaphragm 8, it helps to reduce the opening resistance of the valve stem assembly 4. At the same time, a threaded section is set at the lower end of the air guide rod 43 to provide a standardized and high-precision installation and locking foundation for the valve disc.

[0039] In a further preferred configuration, the valve disc 5 includes an upper clamping pad 51, a valve disc sealing pad 52, and a lower clamping pad 53. The valve disc sealing pad 52 mates with the lower end face of the valve port 23 and is clamped between the upper clamping pad 51 and the lower clamping pad 53. A step is provided on the third threaded section of the air guide rod 43. The upper clamping pad 51 abuts against the step, and the lower clamping pad 53 is screwed onto the third threaded section via a threaded engagement, thus clamping and fixing the valve disc sealing pad 52 between the upper clamping pad 51 and the lower clamping pad 53. This structural configuration, relying on the step positioning and threaded locking engagement of the air guide rod 43, can precisely limit the installation position and clamping force of the valve disc sealing pad 52, ensuring the coaxial alignment accuracy of the valve disc 5 and the valve port 23, and improving the sealing consistency during valve opening and closing. Meanwhile, this sandwich-type valve disc 5 structure enables the independent detachable replacement of the valve disc gasket 52. When the valve disc gasket wears or ages due to long-term opening and closing, the seal can be quickly replaced simply by removing and installing the clamping gasket, without having to disassemble the entire valve stem assembly, thus reducing maintenance costs and repair difficulty.

[0040] As an alternative to the aforementioned threaded connection, the valve stem 41, intermediate sleeve 42, and air guide rod 43 in this embodiment can also be detachably fixed using a snap-locking structure. Specifically, at the connection between the valve stem 41 and the intermediate sleeve 42, and at the connection between the intermediate sleeve 42 and the air guide rod 43, mutually cooperating elastic claws and slots are respectively provided. Taking the connection between the intermediate sleeve 42 and the air guide rod 43 as an example: an elastic claw can be provided at the lower end of the intermediate sleeve 42, and a corresponding slot can be provided at the upper end of the air guide rod 43. During assembly, the intermediate sleeve is axially pushed into the air guide rod, causing the elastic claw to be radially compressed. After reaching its position, it elastically resets and locks into the slot to form a self-locking mechanism. Alternatively, the positions of the elastic claw and the slot can be interchanged. When disassembly is required, use a tool or manually press the release tab located on the outside of the jaws to cause the jaws to retract radially and disengage from the slots, thus separating the two components. To ensure a tight seal after connection, O-rings should be installed between each mating end face. The locking force of the snap-fit ​​will press the end faces together to create a seal. This snap-fit ​​connection method is suitable for quick replacement and maintenance of the valve stem assembly, allowing for disassembly and assembly without tools. Those skilled in the art can select the specific installation method for the valve stem assembly based on the above description; other equivalent embodiments will not be elaborated upon here.

[0041] This embodiment combines Figures 1-3The pressure regulating diaphragm 3 in the upper pressure chamber 11 and the adjusting mechanism are described in detail: The upper pressure chamber 11 is provided with a pressure regulating spring 100 that cooperates to press against the pressure regulating diaphragm 3. The pressure regulating diaphragm 3 adopts a multi-layer composite structure, including a working diaphragm 31, an upper diaphragm plate 32 and a lower diaphragm plate 33. The upper diaphragm plate 32 and the lower diaphragm plate 33 are fixedly connected to the valve stem 41 in the central area by means of threads or riveting, and the working diaphragm 31 is clamped between the two. The upper side of the upper diaphragm plate 32 is also covered with a safety membrane. The safety diaphragm 34 and the outer edge of the working diaphragm 31 are fixedly connected to the valve body 1. This pressure regulating diaphragm 3 employs a double-layer composite diaphragm structure formed by the working diaphragm 31 and the working diaphragm 31. This composite diaphragm structure cooperates with the spring pressure regulating mechanism, ensuring a stable effective force-bearing area and reliable force transmission by clamping the working diaphragm 31 with upper and lower pressure plates. This results in balanced force distribution and smooth deformation of the pressure regulating diaphragm 3, and precise synchronization with the valve stem 41's linkage transmission. This effectively avoids localized tearing and misalignment of the diaphragm, significantly improving efficiency. The structural strength and service life of the pressure regulating diaphragm 3 are improved. The safety diaphragm 34 provides safety protection against abnormal overpressure in the medium, preventing instantaneous overload damage and significantly improving valve safety. Further preferably, the top of the valve body 1 has a positioning cavity extending axially and connected to the upper pressure chamber 11. The positioning cavity contains an adjustment mechanism consisting of a pressure regulating spring 100, a spring washer 101, and an adjusting nut 102. The adjusting nut 102 is movably and adjustablely positioned within the positioning cavity via a thread. The upper end of the pressure regulating spring 100 abuts against the adjusting nut 102 via the spring washer 101, and its lower end abuts against the central positioning block of the safety diaphragm 34. By turning the adjusting nut 102, the preload applied by the pressure regulating spring 100 to the pressure regulating diaphragm 3 is adjusted, thereby flexibly setting the valve outlet pressure. The adjustment operation is simple and can adapt to pressure setting requirements under different working conditions, ensuring that the downstream outlet pressure is stably maintained within the set range, thus improving the adjustment accuracy, operational stability, and safety reliability of the pressure regulator.

[0042] The working principle of the voltage regulator in this embodiment will be explained below in conjunction with the above structure: The automatic pressure regulation of this pressure regulator relies on the coordinated operation of two independent and functionally completely different air paths: the pressure introduction channel 6 and the pressure guide pipe 10. The pressure introduction channel 6 and the pressure action chamber 9 form an auxiliary balancing air path, with the pressure source being the upstream intake channel 21. The volume of the pressure action chamber 9 is much smaller than that of the upper pressure chamber 11 and the lower pressure chamber 12, generating a minimal force that only drives the balancing diaphragm 8 to produce a downward axial thrust, offsetting the additional upward closing force of the intake pressure on the valve disc 5 and reducing the opening resistance of the valve stem assembly. It does not participate in the outlet pressure regulation control. The pressure guide pipe 10 and the lower pressure chamber 12 form the main pressure regulating air path, with the pressure source being the outlet of the downstream outlet channel 22. It feeds back the real-time downstream pressure to below the pressure regulating diaphragm 3 and forms a dynamic main balance with the preload of the pressure regulating spring 100 in the upper pressure chamber 11. This directly controls the lifting displacement of the valve stem assembly and the valve opening, and is the core control air path for achieving automatic outlet pressure regulation.

[0043] When the pressure regulator is working, the upstream medium enters the inlet channel 21, and the upstream pressure is simultaneously introduced into the pressure action chamber 9 through the pressure introduction channel 6, so that the valve stem assembly 4 is always in a low-resistance, non-jamming, ready-to-adjust state. When the downstream gas consumption increases and the outlet pressure decreases, the pressure fed back to the lower pressure chamber 12 through the pressure guide pipe 10 decreases. The pressure regulating diaphragm 3 deforms downward under the action of the pressure regulating spring 100, and drives the valve stem assembly 4 to move downward along the axis, increasing the valve opening 23, increasing the inlet flow rate, and causing the outlet pressure to rise. When the downstream gas consumption decreases and the outlet pressure rises, the pressure fed back to the lower pressure chamber 12 through the pressure guide pipe 10 increases, pushing the pressure regulating diaphragm 3 to deform upward, driving the valve stem assembly 4 to move upward along the axis, decreasing the valve opening, reducing the inlet flow rate, and causing the outlet pressure to fall back to the set value. Through the above dynamic balancing process, the valve opening of the pressure regulator can be automatically adjusted to stably maintain the outlet pressure within the set range.

[0044] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A wide-range self-balancing pressure regulator, comprising a valve body (1), a valve seat (2), a pressure regulating diaphragm (3), a valve stem assembly (4), and a pressure guide tube (10), wherein the pressure regulating diaphragm (3) is disposed within the valve body (1) and divides the internal space of the valve body (1) into an upper pressure chamber (11) and a lower pressure chamber (12), wherein the valve seat (2) is provided with an air passage structure, the air passage structure comprising an air inlet passage (21), an air outlet passage (22), and a connection between the two. The valve port (23) is axially movably inserted into the valve body (1) and valve seat (2), with its upper end linked to the pressure regulating diaphragm (3) and its lower end provided with a valve disc (5) for opening and closing the valve port (23). The valve disc (5) is located on the lower side of the valve port (23) and arranged on the same side as the air inlet channel (21). The pressure chamber (12) is connected to the downstream outlet of the air outlet channel (22) through the pressure guide pipe (10). Its features are: A sealing cover (7) is fixedly provided inside the valve body (1) and located below the pressure regulating diaphragm (3). The valve stem assembly (4) passes through the sealing cover (7) axially. A balance diaphragm (8) is provided between the sealing cover (7) and the valve body (1) to form a sealed linkage with the valve stem assembly (4). The balance diaphragm (8) and the sealing cover (7) together form a pressure action chamber (9). The pressure action chamber (9) is axially sealed and isolated between the pressure chamber (12) and the air outlet channel (22). A pressure introduction channel (6) is provided inside the valve stem assembly (4). The inlet end of the pressure introduction channel (6) is connected to the air inlet channel (21), and its outlet end is connected to the pressure action chamber (9).

2. The wide-range self-balancing voltage regulator according to claim 1, characterized in that: The valve body (1) is provided with a through-hole (13) that is axially opposite to the valve port (23). The sealing cover (7) surrounds one end of the through-hole (13) facing the pressure regulating diaphragm (3). The outer edge of the balancing diaphragm (8) is clamped and fixed between the upper end face of the sealing cover (7) and the through-hole (13). The valve stem assembly (4) passes through the sealing cover (7), the through-hole (13) and the valve port (23) in sequence along the axial direction and is linked with the inner edge of the balancing diaphragm (8). The top of the sealing cover (7) forms part of the bottom surface of the pressure chamber (12) and supports and separates the pressure chamber (12) and the pressure action chamber (9) along the axial direction. The pressure action chamber (9) is formed at one end of the through-hole (13).

3. The wide-range self-balancing voltage regulator according to claim 1 or 2, characterized in that: The valve stem assembly (4) includes a valve stem (41), an intermediate sleeve (42), and a guide rod (43) connected sequentially along the axial direction. The valve stem (41) is linked with the pressure regulating diaphragm (3). The valve disc (5) is fixedly connected to the lower end of the guide rod (43). The pressure introduction channel (6) is a multi-segment sealed flow path formed inside the valve stem (41), the intermediate sleeve (42), and the guide rod (43) and in the fitting gap.

4. The wide-range self-balancing voltage regulator according to claim 3, characterized in that: The pressure introduction channel (6) includes a first pressure-introducing flow path (61), a second pressure-introducing flow path (62), and a third pressure-introducing flow path (63) connected in sequence; The first pressure-guiding flow path (61) is axially disposed inside the air guide rod (43), and has a pressure inlet formed at the lower end of the air guide rod (43), which is connected to the air intake channel (21); The second pressure-guiding flow path (62) extends axially and is opened inside the intermediate sleeve (42), and is connected to the upper end of the first pressure-guiding flow path (61); The third pressure-guiding flow path (63) is a multi-directional bent flow channel formed by the intersection of an axial section (631) and at least one radial section (632), and is formed inside the valve stem (41); the axial section (631) of the third pressure-guiding flow path (63) is connected to the upper end of the second pressure-guiding flow path (62), the radial section (632) of the third pressure-guiding flow path (63) extends radially along the valve stem (41) and forms at least one pressure outlet on the side wall of the valve stem (41), and the pressure outlet is connected to the pressure action chamber (9).

5. The wide-range self-balancing voltage regulator according to claim 4, characterized in that: One end of the intermediate sleeve (42) is provided with a groove hole (44) with an opening facing the pressure chamber (9). The groove hole (44) is connected to the upper opening of the second pressure-guiding flow path (62). The third pressure-guiding flow path (63) has an L-shaped structure, a T-shaped structure, or a multi-cross structure. The radial section (632) of the third pressure-guiding flow path (63) is connected to the pressure chamber (9) through the groove hole (44).

6. The wide-range self-balancing voltage regulator according to claim 3, characterized in that: The sealing cover (7) has a concave structure, and a hollow guide post (71) extending axially downward is formed at the center of the cover. The valve stem (41) is arranged to pass through the hollow guide post (71) axially. At least one sealing ring (72) is provided between the inner wall of the hollow guide post (71) and the outer wall of the valve stem (41) so that a sliding sealing fit is formed between the valve stem (41) and the sealing cover (7). The outer peripheral sidewall of the intermediate sleeve (42) is provided with an annular locking groove, and the inner edge of the balance diaphragm (8) is fixedly embedded in the annular locking groove and forms a coaxial linkage with the intermediate sleeve (42).

7. The wide-range self-balancing voltage regulator according to claim 3, characterized in that: The valve stem (41), the intermediate sleeve (42), the air guide rod (43), and the valve disc (5) are all detachably and fixedly connected to each other.

8. The wide-range self-balancing voltage regulator according to claim 7, characterized in that: The detachable fixed connection is a threaded connection structure, which includes: a first threaded port at the upper end of the intermediate sleeve (42), a first threaded connector (45) at the lower end of the valve stem (41) and connected to the first threaded port, a second threaded port at the lower end of the intermediate sleeve (42), a second threaded connector (46) at the upper end of the air guide rod (43) and connected to the second threaded port, and a third threaded connector (47) at the lower end of the air guide rod (43). The valve disc (5) is locked to the third threaded connector (47) by threads. The second pressure-guiding flow path (62) formed in the air guide rod extends through the second threaded connector (46) and the third threaded connector (47) at both ends.

9. The wide-range self-balancing voltage regulator according to claim 8, characterized in that: The valve disc (5) includes an upper clamping pad (51), a valve disc sealing pad (52), and a lower clamping pad (53). The valve disc sealing pad (52) mates with the lower end face of the valve port (23) and is clamped between the upper clamping pad (51) and the lower clamping pad (53). A step is provided on the third threaded section of the air guide rod (43). The upper clamping pad (51) abuts against the step. The lower clamping pad (53) is screwed onto the third threaded section by threaded engagement, and the valve disc sealing pad (52) is clamped and fixed between the upper clamping pad (51) and the lower clamping pad (53).

10. The wide-range self-balancing voltage regulator according to claim 1, characterized in that: The upper pressure chamber (11) is provided with a pressure regulating spring (100) that cooperates to press against the pressure regulating diaphragm (3). The pressure regulating diaphragm (3) includes a working diaphragm (31), an upper diaphragm plate (32) and a lower diaphragm plate (33). The upper diaphragm plate (32) and the lower diaphragm plate (33) are fixedly connected to the valve stem (41) in the central area and the working diaphragm plate (31) is sandwiched between the two. The upper side of the upper diaphragm plate (32) is covered with a safety diaphragm (34). The safety diaphragm (34) and the outer edge of the working diaphragm plate (31) are fixedly connected to the valve body (1). The top of the valve body (1) is formed with a positioning cavity that extends axially and connects to the upper pressure chamber (11). The positioning cavity is provided with an adjustment mechanism consisting of a pressure regulating spring (100), a spring washer (101), and an adjusting nut (102). The adjusting nut (102) is movably and adjustablely disposed in the positioning cavity by means of a thread. The upper end of the pressure regulating spring (100) abuts against the adjusting nut (102) through the spring washer (101), and its lower end abuts against the center positioning block of the safety diaphragm (34).

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