Gas pressure regulator

Abstract

The present application relates to gas transmission and distribution equipment technical field, especially to a kind of gas pressure regulator, comprising: sequentially connected from top to bottom main membrane head, valve body and pilot valve;Pressure regulating assembly, the pressure regulating assembly includes valve seat, valve core and valve rod, the surface of the baffle is provided with installation port, the valve seat is fixedly installed in installation port, and top is provided with valve port, the valve core is slidably arranged in valve port, the bottom of the main membrane head is provided with through port, the valve rod is sealingly slidably inserted into through port, and the bottom end of valve rod penetrates valve port and is fixedly connected with valve core top end by straight rod, the main membrane head is provided with drive component for controlling the vertical movement of valve rod;Anti-wave component is arranged at the bottom of valve core, and the anti-wave component is used to reduce the influence of airflow fluctuation on valve core.The present application can effectively buffer the lateral impact and pulsating disturbance of high-speed airflow on valve core under high pressure difference and large flow conditions by setting anti-wave component at the bottom of valve core.

Description

Technical Field

[0001] This invention relates to the field of gas transmission and distribution equipment technology, and in particular to a gas pressure regulator. Background Technology

[0002] Gas pressure regulators are key equipment in gas transmission and distribution systems. They are mainly used to regulate the high-pressure gas from upstream to the stable pressure required downstream, ensuring the safe and stable operation of downstream gas-using equipment.

[0003] Conventional gas pressure regulators primarily regulate pressure by sensing changes in downstream pressure through a diaphragm, which drives the valve stem to move the valve core within the valve port, thereby changing the valve opening. The valve core of these regulators is mostly frustum-shaped, relying on the vertical movement of the valve stem to achieve a sealing fit with the valve port. They are characterized by simple structure and sensitive response, and are widely used in various gas transmission and distribution scenarios.

[0004] Under high pressure differential and high flow conditions, existing gas pressure regulators generate strong lateral impact forces and pulsating interference on the valve core when high-speed airflow passes through the valve port. The valve core is prone to high-frequency flutter, which not only produces obvious noise and howling, but also aggravates the wear of the sealing surface and shortens the service life of the pressure regulator. At the same time, airflow fluctuations cause the valve core to move unstably and fail to maintain a stable opening, which in turn causes downstream pressure fluctuations, resulting in pressure overshoot or regulation lag, and failing to provide a continuous and stable pressure guarantee for downstream gas-using equipment. Summary of the Invention

[0005] The purpose of this invention is to address the following shortcomings in the prior art: under high pressure differential and high flow conditions, the airflow in existing gas pressure regulators is prone to impact and interference with the valve core, causing valve core flutter, whistling and wear of the sealing surface, and affecting the stability of valve core operation, resulting in downstream pressure fluctuations and reduced regulation accuracy. Therefore, this invention proposes a gas pressure regulator.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A gas pressure regulator, comprising: The main diaphragm head, valve body, and pilot valve are connected sequentially from top to bottom; A pressure regulating assembly includes a valve seat, a frustum-shaped valve core, and a rectangular valve stem. The valve body is divided into an inlet space and an outlet space by a Z-shaped partition. The surface of the partition has an installation port. The valve seat is fixedly installed in the installation port and has a frustum-shaped valve port through the top. The valve core is slidably disposed in the valve port. The bottom of the main diaphragm head has a through-hole that communicates with the valve body. The valve stem is slidably inserted into the through-hole, and the bottom end of the valve stem passes through the valve port and is fixedly connected to the top of the valve core through a straight rod. The main diaphragm head has a drive component for controlling the vertical movement of the valve stem. An anti-fluctuation component is provided at the bottom of the valve core, which is used to reduce the impact of airflow fluctuations on the valve core.

[0007] As a preferred embodiment, the anti-fluctuation component includes two hinged rods and two pairs of telescopic springs. A U-shaped block is symmetrically fixedly installed at the bottom of the valve core. A mounting groove is symmetrically opened at the bottom of the partition plate. A slider is horizontally slidably installed within the mounting groove. A rotating opening is opened at the bottom of the slider. A first rotating shaft is rotatably installed within the U-shaped block, and a second rotating shaft is rotatably installed within the rotating opening. One end of each of the two hinged rods is rotatably sleeved on the two first rotating shafts, and the other end of each of the two hinged rods is rotatably sleeved on the two second rotating shafts. The two telescopic springs are located within the two mounting grooves, and both ends of the telescopic springs are fixedly connected to the groove wall of the mounting groove and the surface of the slider, respectively.

[0008] As a preferred embodiment, a hollow rod connected to itself is fixedly mounted on the surface of the main diaphragm head. The driving component includes an adjusting diaphragm and an adjusting spring fixedly mounted inside the main diaphragm head. The adjusting diaphragm divides the inside of the main diaphragm head into an outlet pressure channel and an atmospheric pressure channel. The opening is used to connect the outlet pressure channel and the air outlet space. A spring seat is slidably provided inside the hollow rod. The adjusting spring is located inside the hollow rod, and its two ends are respectively connected to the adjusting diaphragm and the spring seat. An adjusting seat for controlling the lateral movement of the spring seat is provided at the end of the hollow rod away from the main diaphragm head. A U-shaped seat is fixedly mounted on the side of the adjusting diaphragm away from the adjusting spring. A round shaft is horizontally rotatably mounted inside the U-shaped seat. A rocker arm is rotatably sleeved on the round shaft. A pin is horizontally fixedly mounted inside the outlet pressure channel. The rocker arm is rotatably sleeved on the pin. The bottom end of the rocker arm is hinged to the top end of the valve stem.

[0009] As a preferred embodiment, a hollow column covering the top opening of the valve port is fixedly installed on the top of the valve seat. The cross-section of the hollow column is U-shaped. The valve stem is slidably inserted into the hollow column, and both its front and rear surfaces are in sealed sliding contact with the inner wall of the hollow column. A ventilation channel is formed between the side wall of the valve stem and the inner wall of the hollow column. An opening and closing component for controlling its opening and closing is provided in the ventilation channel.

[0010] As a preferred embodiment, the opening and closing component includes a rotating block, which is composed of an integrally formed semi-circular block and an isosceles triangular block. The rotating block is rotatably disposed within the ventilation channel, and sliding seats are symmetrically fixedly installed within the ventilation channel. The rotating block is located between the two sliding seats, and the arc surface of the semi-circular block is in sealed sliding contact with the adjacent surfaces of the two sliding seats. The rotating block is connected to the hollow column through a mounting component, and the two rotating blocks are controlled to rotate together by a pressing component.

[0011] As a preferred embodiment, the mounting component includes an L-shaped plate fixedly mounted on one side of the hollow column, a round rod fixedly mounted on the surface of the rotating block via a connecting rod, a round opening on the surface of the L-shaped plate, the round rod being rotatably mounted in the round opening, and a mounting block being fixedly sleeved on the round rod, the mounting block being fixedly connected to the L-shaped plate via an elastic component.

[0012] As a preferred embodiment, the elastic component includes a torsion spring sleeved on a round rod, with its two ends fixedly connected to a mounting block and an L-shaped plate, respectively.

[0013] As a preferred embodiment, the pressure-retaining component includes two sliding rods. The surface of the end of the round rod away from the connecting rod is provided with a spiral groove. The groove wall of the mounting groove is provided with a sliding opening that communicates with the air outlet space. An L-shaped sliding plate is slidably installed in the sliding opening. A sealing plate for sealing the sliding opening is fixedly sleeved on the sliding plate. The bottom wall of the sealing plate is in sealing sliding contact with the surface of the partition plate. The two sliding rods are respectively vertically fixedly installed on the top of the two sliding plates, and the top ends of the two sliding rods are respectively slidably arranged in the two spiral grooves.

[0014] As a preferred embodiment, pressure relief ports are provided on both sides of the hollow column, and sliding plates are vertically slidably installed on both sides of the hollow column. Vents are provided on the surface of the sliding plates, and the two pressure relief ports are respectively located on the movement paths of the two vents. Pre-pressure relief components are symmetrically provided on the top of the hollow column, and the two sets of pre-pressure relief components are respectively used to control the vertical movement of the two sliding plates.

[0015] As a preferred embodiment, the pre-depressurization component includes a U-shaped frame fixedly installed on the top of the hollow column, a telescopic rod vertically fixedly installed below the top of the U-shaped frame, and a circular movable block fixedly installed at the moving end of the telescopic rod. The U-shaped frame has vertical slots on both sides, and connecting rods are fixedly installed on both sides of the sliding plate. Each pair of connecting rods passes through the slots on both sides of the U-shaped frame and is fixedly connected to the side wall of the movable block. The two movable blocks are located above the two rotating blocks and on the rotation path of the rotating blocks. The radius of the semicircular block is greater than the height of the isosceles triangular block.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. By setting an anti-fluctuation component at the bottom of the valve core and using a hinged rod in conjunction with a telescopic spring to form a flexible constraint support, it can effectively buffer the lateral impact and pulsation disturbance of high-speed airflow on the valve core under high pressure difference and high flow conditions, suppress high-frequency chatter of the valve core, reduce the collision and wear of the valve core and valve seat sealing surface, reduce operating noise and whistling phenomenon, extend the service life of the pressure regulator, and at the same time stabilize the working opening of the valve core, avoid pressure overshoot and regulation lag problems, ensure the continuous and stable output of downstream gas pressure, and improve the pressure regulation accuracy and gas supply stability. 2. The rotating block, which is integrally formed from a semi-circular block and an isosceles triangular block, has two working postures. When the semi-circular block is facing down and the isosceles triangular block is facing up, the semi-circular block can play an auxiliary role in sealing the gap around the valve port, improving the sealing performance after the valve port is closed. When the isosceles triangular block is facing down and the semi-circular block is facing up, the isosceles triangular block can guide, divert, and break the high-speed gas flow through the valve port, disperse the concentrated airflow, weaken the impact of airflow pulsation, and reduce the disturbance of airflow to the valve core from the source. 3. During the process of rotating the block to achieve two working postures, since the radius of the semicircular block is greater than the height of the isosceles triangle block, it can push and drive the upper moving block to move vertically, so that the vent on the sliding plate and the pressure relief port on the hollow column form a brief alignment and conduction. During the process of the valve core descending and approaching and blocking the valve port, the brief conduction of the pressure relief port can pre-release and equalize the pressure of the upstream and downstream chambers of the valve port in advance, reduce the pressure difference impact before and after the valve core sits down, and avoid water hammer and oscillation in the pipeline caused by hard contact and pressure change. During the process of the valve core descending and separating from the valve port to open the air, the pressure relief port is also briefly connected, which can balance the pressure on both sides of the valve port in advance, reduce the airflow suction and instantaneous impact at the moment the valve core opens, make the valve core opening action smoother and more gentle, and prevent instantaneous overpressure and valve core bounce. 4. Using the vertical displacement of the valve core as the power source, the mechanism sequentially drives the anti-fluctuation structure of the hinge rod, the rotating block to switch postures, the vertical lifting and lowering of the moving block, and the synchronous sliding of the sliding plate. This achieves the linkage of valve core action, rotating block posture switching, auxiliary sealing, flow guidance and stabilization, and dual-stroke short-term pre-pressure relief and equalization. This not only weakens airflow fluctuations at the source but also improves sealing performance and pressure regulation accuracy. At the same time, it achieves buffer pressure equalization during the opening and closing of the valve core, ensuring a tight fit and improving the overall performance and adaptability of the pressure regulator. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of a gas pressure regulator proposed in this invention; Figure 2 This is a partial three-dimensional cross-sectional structural diagram of a gas pressure regulator proposed in this invention; Figure 3 This is a schematic diagram of a partial three-dimensional cross-sectional structure of the valve body in this invention; Figure 4 This is a three-dimensional structural diagram of the partition in this invention; Figure 5 This is a partial bottom-view three-dimensional structural diagram of the partition in this invention; Figure 6 This is a partial three-dimensional structural diagram of the anti-wave component in this invention; Figure 7 This is a partial frontal three-dimensional structural diagram of the partition in this invention; Figure 8This is a partial three-dimensional structural diagram of the rotating block and the pre-depressurization component in this invention; Figure 9 for Figure 7 Enlarged structural diagram at point A in the middle; Figure 10 for Figure 5 Enlarged structural diagram at point B; Figure 11 A partial three-dimensional structural schematic diagram of the valve port when it is open in this invention; Figure 12 A partial three-dimensional structural diagram of the valve port when closed in this invention; Figure 13 A schematic diagram of a partial cross-sectional structure of the valve seat and the hollow column in this invention.

[0018] In the diagram: 1. Main diaphragm head, 2. Valve body, 3. Pilot valve, 4. Valve seat, 5. Valve core, 6. Valve stem, 7. Diaphragm, 8. Valve port, 9. Hinge rod, 10. Telescopic spring, 11. U-shaped block, 12. Mounting groove, 13. Slider, 14. Adjusting diaphragm, 15. Adjusting spring, 16. Hollow rod, 17. Spring seat, 18. Adjusting seat, 19. U-shaped seat, 20. Rocker arm, 21. Pin, 22. Hollow column, 23. Rotating block, 231. Semicircular block, 232. Isosceles triangular block, 24. Sliding seat, 25. L-shaped plate, 26. Round rod, 27. Mounting block, 28. Torsion spring, 29. Slide rod, 30. Spiral groove, 31. Slide opening, 32. Slide plate, 33. Sealing plate, 34. Pressure relief port, 35. Sliding plate, 36. Vent, 37. U-shaped frame, 38. Telescopic rod, 39. Moving block, 40. Connecting rod. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0020] Reference Figures 1-2 A gas pressure regulator, comprising: The main diaphragm head 1, valve body 2, and pilot valve 3 are connected sequentially from top to bottom. The bottom of the main diaphragm head 1 is sealed and fixedly connected to the top of the valve body 2. The pilot valve 3 is used to cooperate with the main diaphragm head 1 to achieve pressure regulation control (this has been disclosed in the Chinese patent with patent number CN213655743U and patent name "Pressure Regulation Structure of Variable Loading Type Pressure Regulator", which belongs to the prior art, and its working principle will not be described in detail here).

[0021] The pressure regulating assembly includes a valve seat 4, a frustum-shaped valve core 5, and a rectangular valve stem 6, such as... Figures 3-4As shown, the valve body 2 is divided into an inlet space and an outlet space by a Z-shaped partition 7. An installation port is provided on the surface of the partition 7, and the valve seat 4 is fixedly installed in the installation port. A frustum-shaped valve port 8 is provided through the top of the partition 7. The valve core 5 is slidably disposed within the valve port 8. A through-hole communicating with the valve body 2 is provided at the bottom of the main diaphragm head 1. The valve stem 6 is slidably inserted into the through-hole, and the bottom end of the valve stem 6 passes through the valve port 8 and is fixedly connected to the top of the valve core 5 via a straight rod. The main diaphragm head 1 is equipped with a drive component for controlling the vertical movement of the valve stem 6. A hollow rod 16 communicating with itself is fixedly installed on the surface of the main diaphragm head 1. The drive component includes an adjusting diaphragm 14 and an adjusting spring 15 fixedly installed within the main diaphragm head 1. The adjusting diaphragm 14 divides the main diaphragm head 1 into an inlet space and an outlet space. The valve is divided into an outlet pressure channel and an atmospheric pressure channel. The opening is used to connect the outlet pressure channel and the outlet space. A spring seat 17 is slidably provided inside the hollow rod 16. An adjusting spring 15 is located inside the hollow rod 16, and the two ends of the adjusting spring 15 are respectively connected to the adjusting diaphragm 14 and the spring seat 17. An adjusting seat 18 for controlling the lateral movement of the spring seat 17 is provided inside the end of the hollow rod 16 away from the main diaphragm head 1. A U-shaped seat 19 is fixedly installed on the side of the adjusting diaphragm 14 away from the adjusting spring 15. A round shaft is horizontally rotatably installed inside the U-shaped seat 19. A rocker arm 20 is rotatably sleeved on the round shaft. A pin 21 is horizontally fixedly installed inside the outlet pressure channel. The rocker arm 20 is rotatably sleeved on the pin 21. The bottom end of the rocker arm 20 is hinged to the top end of the valve stem 6.

[0022] During operation, when the gas enters from the inlet space of the valve body 2, flows through the valve port 8 into the outlet space, the gas pressure in the outlet space is transmitted to the outlet pressure channel of the main diaphragm head 1 through the port. When the outlet pressure changes, the pressure in the outlet pressure channel and the atmospheric pressure in the atmospheric pressure channel form a pressure difference, which drives the regulating diaphragm 14 to move. When the regulating diaphragm 14 moves, it drives the U-shaped seat 19 and the round shaft to move, causing the rocker arm 20 sleeved on the round shaft to rotate around the pin 21. The bottom end of the rocker arm 20 then drives the valve stem 6 to slide vertically along the port. The valve stem 6 then drives the valve core 5 to move synchronously in the valve port 8 through the straight rod, thereby changing the opening of the valve port 8, regulating the gas flow, and keeping the gas pressure in the outlet space stable. At the same time, the spring seat 17 can be controlled to move laterally in the hollow rod 16 through the regulating seat 18, changing the preload of the regulating spring 15, thereby setting the target working pressure of the pressure regulator. The pilot valve 3 cooperates with the main diaphragm head 1 to help stabilize the working state of the regulating diaphragm 14 and improve the stability of the pressure regulation.

[0023] Reference Figures 5-6An anti-fluctuation component is installed at the bottom of the valve core 5 to reduce the impact of airflow fluctuations on the valve core 5. The anti-fluctuation component includes two hinge rods 9 and two pairs of telescopic springs 10. A U-shaped block 11 is symmetrically fixedly installed at the bottom of the valve core 5. A mounting groove 12 is symmetrically opened at the bottom of the partition plate 7. A slider 13 is horizontally slidably installed in the mounting groove 12. A rotating opening is opened at the bottom of the slider 13. A first rotating shaft is rotatably installed in the U-shaped block 11, and a second rotating shaft is rotatably installed in the rotating opening. One end of the two hinge rods 9 is rotatably sleeved on the two first rotating shafts, and the other end of the two hinge rods 9 is rotatably sleeved on the two second rotating shafts. The two telescopic springs 10 are located in the two mounting grooves 12, and the two ends of the telescopic springs 10 are fixedly connected to the groove wall of the mounting groove 12 and the surface of the slider 13, respectively.

[0024] During operation, when the valve core 5 is impacted by airflow or pulsating interference, causing a lateral offset tendency, the U-shaped block 11 at the bottom of the valve core 5 will drive the hinge rod 9 to swing through the first rotating shaft. The hinge rod 9 will then drive the slider 13 to slide horizontally along the mounting groove 12 through the second rotating shaft. During the sliding process, the slider 13 will compress or stretch the corresponding telescopic spring 10. The elastic force of the telescopic spring 10 will act in the opposite direction on the slider 13, and the reaction force will be transmitted back to the valve core 5 through the hinge rod 9, thereby offsetting the lateral impact force of the airflow on the valve core 5 and limiting the lateral offset of the valve core 5. The telescopic spring 10 itself has elastic buffering and damping functions, which can absorb the kinetic energy generated by the small-amplitude high-frequency vibration of the valve core 5, effectively suppressing the high-frequency flutter phenomenon of the valve core 5 and preventing the valve core 5 from continuously shaking.

[0025] When the valve core 5 moves upward with the valve stem 6 and the valve port 8 opening becomes smaller, the valve core 5 moves upward, causing the U-shaped block 11 to move upward. The hinge rod 9 swings accordingly and pushes the slider 13 to slide outward of the mounting groove 12, compressing the telescopic spring 10. The telescopic spring 10 stores elastic force under pressure, and at the same time, it forms a flexible support for the valve core 5 through the hinge rod 9, avoiding hard contact and collision of the valve core 5 at the valve port 8.

[0026] When the valve core 5 moves downward with the valve stem 6 and the valve port 8 opens wider, the valve core 5 moves downward, causing the U-shaped block 11 to move downward. The hinge rod 9 then swings in the opposite direction. The slider 13 returns to the inside of the mounting groove 12 under the elastic force of the telescopic spring 10. The telescopic spring 10 releases its elastic force, which, together with the hinge rod 9, stabilizes the movement posture of the valve core 5, reduces the interference of airflow pulsation on the vertical movement of the valve core 5, and makes the opening and closing action of the valve core 5 more stable.

[0027] Reference Figure 7 A hollow column 22, covering the top opening of the valve port 8, is fixedly installed on the top of the valve seat 4. The cross-section of the hollow column 22 is U-shaped. The valve stem 6 is slidably inserted into the hollow column 22, and both its front and rear surfaces are in sealed sliding contact with the inner wall of the hollow column 22. A ventilation channel is formed between the side wall of the valve stem 6 and the inner wall of the hollow column 22. Figure 8As shown, the ventilation channel is equipped with an opening and closing component for controlling its opening and closing. The opening and closing component includes a rotating block 23, which is composed of an integrally formed semi-circular block 231 and an isosceles triangular block 232. The rotating block 23 is rotatably disposed within the ventilation channel. Sliding seats 24 are symmetrically fixedly installed within the ventilation channel. The rotating block 23 is located between the two sliding seats 24, and the arc surface of the semi-circular block 231 is in sealed sliding contact with the adjacent surfaces of the two sliding seats 24. The contact surfaces of the rotating block 23 with the valve stem 6, the sliding seats 24, and the hollow column 22 are all in sealed contact. The rotating block 23 is connected by a valve stem 6, a sliding seat 24, and a hollow column 22. The mounting component is connected to the hollow column 22, and the two rotating blocks 23 are controlled to rotate together by the pressing component. The mounting component includes an L-shaped plate 25 fixedly installed on one side of the hollow column 22. A round rod 26 is fixedly installed on the surface of the rotating block 23 by a connecting rod. A round opening is opened on the surface of the L-shaped plate 25. The round rod 26 is rotatably installed in the round opening, and a mounting block 27 is fixedly sleeved on the round rod 26. The mounting block 27 is fixedly connected to the L-shaped plate 25 by an elastic component. The elastic component includes a torsion spring 28 sleeved on the round rod 26. The two ends of the torsion spring 28 are fixedly connected to the mounting block 27 and the L-shaped plate 25 respectively.

[0028] Reference Figures 9-10 The pressure-retaining component includes two sliding rods 29. The surface of the round rod 26 away from the connecting rod has a spiral groove 30. The groove wall of the mounting groove 12 has a sliding opening 31 that communicates with the air outlet space. An L-shaped sliding plate 32 is slidably installed in the sliding opening 31. A sealing plate 33 for sealing the sliding opening 31 is fixedly sleeved on the sliding plate 32. The bottom wall of the sealing plate 33 is in sealing sliding contact with the surface of the partition 7. The two sliding rods 29 are respectively vertically fixedly installed on the top of the two sliding plates 32, and the top ends of the two sliding rods 29 are respectively slidably arranged in the two spiral grooves 30.

[0029] Reference Figure 11 When the valve core 5 is in the downward position and has not entered the valve port 8 or blocked the valve port 8, the slider 13 in the mounting groove 12 at the bottom of the partition 7 does not apply lateral pressure to the slide plate 32. At this time, the distance between the two slide plates 32 is the shortest. Under the action of the elastic potential energy of the torsion spring 28, the rotating block 23 maintains the initial set posture, that is, the semicircular block 231 is located above, the isosceles triangular block 232 is facing down, and the two inclined surfaces of the isosceles triangular block 232 form a symmetrical flow channel with the two sliding seats 24. This flow channel is connected to the ventilation channel. With the passage open, the high-speed gas flowing through valve port 8 will circulate through the ventilation channel and the flow channel. The acute angle structure of the isosceles triangular block 232 plays a role in guiding and diverting the high-speed gas, breaking the concentrated airflow into multiple smooth airflows, weakening the intensity of airflow pulsation, reducing the impact and disturbance on valve core 5, and achieving dual flow stabilization in conjunction with anti-fluctuation components. At the same time, the flow channel can balance the gas pressure on both sides of valve stem 6, avoiding excessive pressure on one side that would cause valve stem 6 to tilt, making valve core 5 slide smoothly in valve port 8 and improving pressure regulation accuracy.

[0030] When the downstream gas pressure increases, the regulating diaphragm 14 of the main diaphragm head 1 drives the valve stem 6 to move upward, and the valve core 5 moves upward accordingly, gradually entering the valve port 8 and reducing the flow opening. During this process, the valve core 5 drives the two hinge rods 9 to swing outward synchronously through the bottom U-shaped block 11. The other end of the hinge rod 9 pushes the slider 13 to slide away from the U-shaped block 11 along the mounting groove 12. After the slider 13 slides to a certain stroke, its outer end face contacts the inner end face of the slide plate 32 and continuously applies lateral pressure, pushing the slide plate 32 to slide along the sliding port 31. The sealing plate 33 moves synchronously with the slide plate 32. It always maintains a sealed sliding contact with the surface of the partition plate 7 to prevent gas from passing through the sliding port 31 during the sliding process. When the sliding plate 32 moves, it drives the top sliding rod 29 to move synchronously. The top of the sliding rod 29 slides in the spiral groove 30 of the round rod 26. Through the transmission action of the spiral surface, the linear motion of the sliding rod 29 is converted into the rotation of the round rod 26 around the axis. Since the two sliders 13 slide synchronously and the two sliding rods 29 move synchronously, the two round rods 26 achieve synchronous rotation at the same angle. Then, through the connecting rod, the two rotating blocks 23 are driven to rotate synchronously in the ventilation channel. The torsion spring 28 is twisted and stores elastic potential energy.

[0031] During the rotation of the rotating block 23, the semicircular block 231, which was originally located at the top, will rotate downwards, gradually slide into the ventilation channel, and enter between the two sliding seats 24. Its outer arc surface will make sealing sliding contact with the contact surfaces of the two sliding seats 24, such as... Figure 12 As shown, when the valve core 5 is fully inserted into the valve port 8 and the valve port 8 is sealed, the rotating block 23 will rotate 180° to reach the final posture with the semicircular block 231 facing down and the isosceles triangular block 232 facing up. At this time, the outer arc surface of the semicircular block 231 is tightly fitted with the two sliding seats 24, closing the ventilation channel and effectively sealing the ventilation channel. This forms a double sealing structure with the valve core 5. The valve core 5 achieves the main seal by cooperating with the conical surface of the valve port 8 through its own conical surface, while the semicircular block 231 achieves the auxiliary seal through the annular coverage of its bottom edge. The double sealing structure reinforces each other and greatly improves the overall sealing level of the valve port 8. Even if the sealing surface of the valve core 5 experiences minor wear, the semicircular block 231 can still prevent high-pressure gas leakage and enhance the sealing reliability.

[0032] When the downstream gas pressure decreases, the regulating diaphragm 14 of the main diaphragm head 1 drives the valve stem 6 to move downward, and the valve core 5 moves downward accordingly, gradually disengaging from the valve port 8 and increasing the flow opening. During this process, the valve core 5 drives the hinge rod 9 to swing inward through the U-shaped block 11, and the slider 13 returns to the inside of the mounting groove 12 under the elastic force of the telescopic spring 10. The lateral pressure on the slide plate 32 gradually decreases until it disappears. At this time, the torsion spring 28 releases the stored elastic potential energy, driving the round rod 26 to rotate in the opposite direction. The round rod 26 drives the slide plate 32 to return to the initial position along the slide port 31 with the slide rod 29 through the cooperation of the spiral slide groove 30 and the slide rod 29. At the same time, the round rod 26 drives the rotating block 23 to rotate in the opposite direction through the connecting rod, returning to the initial posture with the semicircular block 231 facing up and the isosceles triangular block 232 facing down. The ventilation channel is reopened, restoring the flow and flow stabilization functions, and preparing for the next pressure regulation action.

[0033] Reference Figures 11-13 Both sides of the hollow column 22 are provided with pressure relief ports 34, and both sides of the hollow column 22 are vertically slidably mounted with sliding plates 35. The surface of the sliding plates 35 is provided with vents 36. The two pressure relief ports 34 are respectively located on the moving paths of the two vents 36. The top of the hollow column 22 is symmetrically provided with pre-pressure relief components. Two sets of pre-pressure relief components are used to control the vertical movement of the two sliding plates 35. The pre-pressure relief components include a U-shaped frame 37 fixedly installed on the top of the hollow column 22, a telescopic rod 38 vertically fixedly installed below the top of the U-shaped frame 37, and a moving rod fixedly installed on the telescopic rod 38. The circular movable block 39 at the end, the U-shaped frame 37 has vertical slots on both sides, and the sliding plate 35 has connecting rods 40 fixedly installed on both sides. Each pair of connecting rods 40 passes through the slots on both sides of the U-shaped frame 37 and is fixedly connected to the side wall of the movable block 39. The two movable blocks 39 are located above the two rotating blocks 23 and on the rotation path of the rotating blocks 23. The radius of the semicircular block 231 is greater than the height of the isosceles triangle block 232, that is, the radius of the semicircular block 231 is greater than the vertical distance from the vertex of the isosceles triangle block 232 to the base shared with the semicircular block 231.

[0034] When the rotating block 23 is in the initial posture of "semicircular block 231 facing up and isosceles triangular block 232 facing down", the top of the semicircular block 231 faces up and is in close contact with the bottom of the moving block 39. Due to the large radius of the semicircular block 231, its protrusion height pushes the moving block 39 to remain in a high position. The telescopic rod 38 is compressed by the pressure of the moving block 39. When the moving block 39 is in a high position, the connecting rod 40 drives the sliding plate 35 to be in the highest stroke position at the same time. At this time, the vent 36 on the sliding plate 35 is located above the pressure relief port 34. The plate surface of the sliding plate 35 covers and seals the pressure relief port 34, and the gas cannot leak through the pressure relief port 34.

[0035] When the valve core 5 moves upward and approaches the sealing valve port 8, the rotating block 23 rotates synchronously under the drive of the pressing component. Its posture gradually changes from "semicircular block 231 facing up, isosceles triangular block 232 facing down" to "semicircular block 231 facing down, isosceles triangular block 232 facing up". During the rotation, the structure abutting against the moving block 39 gradually changes from semicircular block 231 to isosceles triangular block 232. Since the height of the isosceles triangular block 232 is less than the radius of the semicircular block 231, the moving block 39 and the sliding plate 35 will move downward synchronously under the action of gravity. The connecting rod 40 slides vertically along the strip openings on both sides of the U-shaped frame 37. The strip openings play a limiting and guiding role for the connecting rod 40, so that the sliding plate 35 only moves vertically and does not deviate or tilt. During the downward sliding of the sliding plate 35, the distance between the vent 36 and the pressure relief port 34 will gradually approach. When the position of the vent 36 and the pressure relief port 34 is close, the distance between the vent 36 and the pressure relief port 34 will gradually approach. When the valve core 5 and valve port 8 are exactly aligned, they are briefly aligned and connected. The high-pressure gas remaining in the ventilation channel is quickly discharged through the vent 36 and the pressure relief port 34, achieving pre-pressure relief and equalization before the valve port 8 is blocked. This reduces the pressure difference impact between the valve core 5 and the valve port 8. The core of this pre-pressure relief is that when the valve core 5 moves upward, the flow cross-sectional area of ​​the valve port 8 decreases, and the gas flow rate increases sharply, resulting in instantaneous high pressure around the valve port 8 and in the ventilation channel. Even if the valve port 8 and the ventilation channel are still connected, this local high pressure will generate a pressure difference impact at the moment the valve core 5 is blocked. This can easily cause the sealing surfaces of the valve core 5 and the valve port 8 to collide and wear, leading to sealing failure. Pre-pressure relief can be achieved by rotating the block 23 to rotate and drive the sliding plate 35 to slide, so that the vent 36 and the pressure relief port 34 are briefly connected, quickly discharging the high-pressure gas in the channel, balancing the pressure on both sides of the valve port 8 in advance, reducing the impact when the valve core 5 is blocked, and ensuring the reliability of the seal.

[0036] When the rotating block 23 completes a 180° rotation, and the isosceles triangular block 232 faces upward and abuts against the bottom of the moving block 39, the moving block 39 is stably in a low position. The sliding plate 35 slides synchronously to the lowest stroke position. At this time, the vent 36 is located below the pressure relief port 34, and the surface of the sliding plate 35 covers and seals the pressure relief port 34 again, thus terminating the pre-pressure relief action.

[0037] When the valve core 5 moves downward and disengages from the valve port 8, the rotating block 23 flips back to its original position under the action of the torsion spring 28. Its posture gradually returns from "semicircular block 231 facing down, isosceles triangular block 232 facing up" to "semicircular block 231 facing up, isosceles triangular block 232 facing down". During this process, the structure abutting against the moving block 39 gradually switches from isosceles triangular block 232 to semicircular block 231. The radius of semicircular block 231 is larger, and its protrusion height pushes the moving block 39 upward. The telescopic rod 38 is compressed again. When the moving block 39 moves upward, it drives the sliding plate 35 to move upward through the connecting rod 40. As the sliding plate 35 slides upward, the vent 36 will briefly align and connect with the pressure relief port 34 again. At this time, the chamber pressure before the valve port 8 opens is quickly balanced through this channel, reducing the airflow impact at the moment the valve core 5 opens. When the rotating block 23 returns to its initial position and the semicircular block 231 and the moving block 39 are in close contact, the moving block 39 returns to its high position, and the sliding plate 35 is simultaneously at its highest stroke position. The vent 36 is located above the pressure relief port 34, and the sliding plate 35 re-seals the pressure relief port 34. The pre-pressure relief component returns to its initial state, preparing for the next action.

[0038] Throughout the process, the rotation of the rotating block 23 always drives the moving block 39 to switch between high and low positions. The sliding plate 35 rises and falls synchronously with the moving block 39. Only during the middle stroke of the high-low position switching, the vent 36 and the pressure relief port 34 are briefly connected to achieve pre-pressure relief. The initial and final states are kept blocked, which ensures the accuracy of pressure relief and avoids gas leakage.

[0039] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A gas pressure regulator, characterized in that, include: The main diaphragm head (1), valve body (2), and pilot valve (3) are connected sequentially from top to bottom. The pressure regulating assembly includes a valve seat (4), a frustum-shaped valve core (5), and a rectangular valve stem (6). The valve body (2) is divided into an air inlet space and an air outlet space by a Z-shaped partition (7). The partition (7) has an installation port on its surface. The valve seat (4) is fixedly installed in the installation port and has a frustum-shaped valve port (8) through its top. The valve core (5) is slidably disposed in the valve port (8). The bottom of the main diaphragm head (1) has a through-hole that communicates with the valve body (2). The valve stem (6) is sealed and slidably inserted into the through-hole. The bottom end of the valve stem (6) passes through the valve port (8) and is fixedly connected to the top end of the valve core (5) by a straight rod. The main diaphragm head (1) has a drive component for controlling the vertical movement of the valve stem (6). An anti-fluctuation component is provided at the bottom of the valve core (5), which is used to reduce the impact of airflow fluctuations on the valve core (5).

2. A gas pressure regulator according to claim 1, characterized in that, The anti-fluctuation component includes two hinge rods (9) and two pairs of telescopic springs (10). A U-shaped block (11) is symmetrically fixedly installed at the bottom of the valve core (5). A mounting groove (12) is symmetrically opened at the bottom of the partition plate (7). A slider (13) is horizontally slidably installed in the mounting groove (12). A rotating opening is opened at the bottom of the slider (13). A first rotating shaft is rotatably installed in the U-shaped block (11). A second rotating shaft is rotatably installed in the rotating opening. One end of the two hinge rods (9) is rotatably sleeved on the two first rotating shafts respectively. The other end of the two hinge rods (9) is rotatably sleeved on the two second rotating shafts respectively. The two telescopic springs (10) are located in the two mounting grooves (12) respectively, and the two ends of the telescopic springs (10) are fixedly connected to the groove wall of the mounting groove (12) and the surface of the slider (13) respectively.

3. A gas pressure regulator according to claim 1, characterized in that, A hollow rod (16) connected to itself is fixedly installed on the surface of the main membrane head (1). The driving component includes an adjusting diaphragm (14) and an adjusting spring (15) fixedly installed inside the main membrane head (1). The adjusting diaphragm (14) divides the inside of the main membrane head (1) into an outlet pressure channel and an atmospheric pressure channel. The opening is used to connect the outlet pressure channel and the outlet space. A spring seat (17) is slidably provided inside the hollow rod (16). The adjusting spring (15) is located inside the hollow rod (16), and the two ends of the adjusting spring (15) are respectively connected to the adjusting diaphragm (14) and the spring. The spring seat (17) is connected, and the hollow rod (16) is provided with an adjustment seat (18) for controlling the lateral movement of the spring seat (17) at one end away from the main diaphragm head (1). The adjustment diaphragm (14) is fixedly installed with a U-shaped seat (19) on the side away from the adjustment spring (15). A round shaft is horizontally rotatably installed in the U-shaped seat (19), and a rocker arm (20) is rotatably sleeved on the round shaft. A pin (21) is horizontally fixedly installed in the outlet pressure channel. The rocker arm (20) is rotatably sleeved on the pin (21), and the bottom end of the rocker arm (20) is hinged to the top end of the valve stem (6).

4. A gas pressure regulator according to claim 2, characterized in that, The valve seat (4) is fixedly mounted on the top of a hollow column (22) that covers the top opening of the valve port (8). The cross-section of the hollow column (22) is U-shaped. The valve stem (6) is slidably inserted into the hollow column (22), and both its front and rear surfaces are in sealed sliding contact with the inner wall of the hollow column (22). A ventilation channel is formed between the side wall of the valve stem (6) and the inner wall of the hollow column (22). An opening and closing component for controlling its opening and closing is provided in the ventilation channel.

5. A gas pressure regulator according to claim 4, characterized in that, The opening and closing component includes a rotating block (23), which is composed of an integrally formed semi-circular block (231) and an isosceles triangular block (232). The rotating block (23) is rotatably disposed in the ventilation channel. Sliding seats (24) are symmetrically fixedly installed in the ventilation channel. The rotating block (23) is located between the two sliding seats (24), and the arc surface of the semi-circular block (231) is in sealed sliding contact with the side of the two sliding seats (24) that are close to each other. The rotating block (23) is connected to the hollow column (22) through the mounting component, and the two rotating blocks (23) are controlled to rotate together by the pressing component.

6. A gas pressure regulator according to claim 5, characterized in that, The mounting components include an L-shaped plate (25) fixedly mounted on one side of the hollow column (22), a round rod (26) fixedly mounted on the surface of the rotating block (23) via a connecting rod, a round opening on the surface of the L-shaped plate (25), the round rod (26) being rotatably mounted in the round opening, and a mounting block (27) fixedly sleeved on the round rod (26), the mounting block (27) being fixedly connected to the L-shaped plate (25) via an elastic component.

7. A gas pressure regulator according to claim 6, characterized in that, The elastic component includes a torsion spring (28) sleeved on a round rod (26), and the two ends of the torsion spring (28) are fixedly connected to the mounting block (27) and the L-shaped plate (25) respectively.

8. A gas pressure regulator according to claim 6, characterized in that, The pressure-reducing component includes two sliding rods (29). The surface of the round rod (26) away from the connecting rod is provided with a spiral groove (30). The groove wall of the mounting groove (12) is provided with a sliding opening (31) that communicates with the air outlet space. An L-shaped sliding plate (32) is slidably installed in the sliding opening (31). A sealing plate (33) for sealing the sliding opening (31) is fixedly sleeved on the sliding plate (32). The bottom wall of the sealing plate (33) is in sealing sliding contact with the surface of the partition plate (7). The two sliding rods (29) are respectively vertically fixedly installed on the top of the two sliding plates (32), and the top ends of the two sliding rods (29) are respectively slidably arranged in the two spiral grooves (30).

9. A gas pressure regulator according to claim 5, characterized in that, Both sides of the hollow column (22) are provided with pressure relief ports (34), and both sides of the hollow column (22) are vertically slidably mounted with sliding plates (35). The surface of the sliding plates (35) is provided with vents (36). The two pressure relief ports (34) are respectively located on the moving paths of the two vents (36). The top of the hollow column (22) is symmetrically provided with pre-pressure relief components. The two sets of pre-pressure relief components are respectively used to control the vertical movement of the two sliding plates (35).

10. A gas pressure regulator according to claim 9, characterized in that, The pre-depressurization component includes a U-shaped frame (37) fixedly installed on the top of the hollow column (22), a telescopic rod (38) vertically fixedly installed below the top of the U-shaped frame (37), and a circular moving block (39) fixedly installed on the moving end of the telescopic rod (38). The U-shaped frame (37) has vertical slots on both sides. The sliding plate (35) has connecting rods (40) fixedly installed on both sides. Each pair of connecting rods (40) passes through the slots on both sides of the U-shaped frame (37) and is fixedly connected to the side wall of the moving block (39). The two moving blocks (39) are located above the two rotating blocks (23) and on the rotation path of the rotating blocks (23). The radius of the semicircular block (231) is greater than the height of the isosceles triangular block (232).

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