A flow-adjustable gas timing valve

Abstract

This solution discloses a flow-adjustable gas timing valve in the field of safety valve technology, including a valve body with a cavity and inlet and outlet channels on both sides. A transmission mechanism is configured inside the cavity to control the opening and closing of the outlet channel. The inlet channel contains a flow-through assembly, consisting of a first sealing ring, a return spring, a valve core (including a connecting rod and a baffle), a sliding seat (with an inlet hole), a flow-through spring, and an end cap. The first sealing ring is fixed to the end of the inlet channel; the return spring is placed between the first sealing ring and the sliding seat; the baffle has a diameter larger than the outer diameter of the first sealing ring and is located within the return spring but does not contact it; the sliding seat allows gas to pass through; the connecting rod passes through the sliding seat and slides with it; the flow-through spring is sleeved on the connecting rod, with its two ends abutting against the sliding seat and the end cap respectively; the end cap is threaded to the tail of the connecting rod. Furthermore, the valve body is equipped with an adjustment component to adjust the position of the sliding seat relative to the first sealing ring, thereby changing the flow threshold and improving safety performance.

Description

Technical Field

[0001] This invention belongs to the field of safety valve technology, and specifically relates to a flow-adjustable gas timing valve. Background Technology

[0002] In the field of gas safety, such as for natural gas and toxic gases, safety valves (such as timer valves, solenoid valves, and electric valves) play a crucial role when using flow control devices as accessories. When the flow rate increases to the maximum value of the flow control design, or when the outlet pipe becomes detached, causing undervoltage, the flow control device will automatically close the valve to ensure that no safety hazards are caused by overcurrent or undervoltage.

[0003] However, working conditions vary significantly across industries and regions, meaning the required flow thresholds for safety valves will also differ. Existing safety valve products often use fixed flow setpoints, which can lead to variations in flow values ​​across different industries and regions, affecting normal operation and limiting their application areas and scenarios. Continuing to use safety valves with inconsistent flow rates can cause them to automatically shut off due to fluctuations in flow values ​​(which are within normal limits), disrupting users' work and lives. After-sales personnel typically need to disassemble pipelines and replace parts or safety valves to resolve such issues. This disassembly and reinstallation process carries the risk of compromising the pipeline's airtightness, potentially leading to leaks of toxic gases or flammable gases. Furthermore, since parts replacement and safety valve installation require specialized personnel, this significantly increases costs. Summary of the Invention

[0004] The present invention aims to provide a flow-adjustable gas timing valve to solve the problem of fixed flow threshold in current safety valve products.

[0005] This solution discloses a flow-adjustable gas timing valve, comprising a valve body with a cavity inside. An inlet channel and an outlet channel communicating with the cavity are respectively located on opposite sides of the valve body. A transmission mechanism for opening or closing the outlet channel is provided within the cavity. A flow-through assembly is provided within the inlet channel, comprising a first sealing ring, a return spring, a valve core, a sliding seat, a flow-through spring, and an end cap sequentially arranged within the inlet channel. The first sealing ring is fixed to the outlet end of the inlet channel, and the return spring is located between the first sealing ring and the sliding seat, with both ends of the return spring abutting against the valve body. On the wall of the sliding seat, the valve core includes a connecting rod and a circular baffle fixedly connected to the connecting rod. The diameter of the baffle is larger than the outer diameter of the first sealing ring. The sliding seat has evenly distributed air inlets for gas passage. One end of the connecting rod passes through the sliding seat and is slidably connected to it. The baffle is located inside the return spring and there is a gap between the two. The end cap is threaded to the end of the connecting rod away from the return spring. The overcurrent spring is sleeved on the connecting rod, and the two ends of the overcurrent spring abut against the sliding seat and the end cap, respectively. The valve body is provided with an adjusting element for controlling the sliding seat to move closer to or further away from the first sealing ring.

[0006] The working principle and beneficial effects of this scheme are as follows: When it is necessary to reduce the threshold of the overcurrent device, the sliding seat is controlled by the adjusting component to move towards the first sealing ring. The sliding seat drives the valve core, overcurrent spring, and end cap to move towards the first sealing ring, reducing the distance between the baffle end face and the first sealing ring. At this time, if the inlet flow increases, the valve core is pressed in. Because the distance between the baffle end face and the first sealing ring is reduced, the overcurrent spring only needs a smaller flow to achieve contact between the baffle and the first sealing ring, thus closing the valve. Conversely, by controlling the sliding seat to move away from the first sealing ring, the sliding seat, valve core, and overcurrent spring move away from the first sealing ring, increasing the distance between the baffle end face and the first sealing ring. At this time, if the inlet flow increases, the valve core is pressed in. Because the distance between the baffle end face and the first sealing ring is increased, the overcurrent spring needs a larger flow to achieve contact between the baffle and the first sealing ring, thus closing the valve, while the spring elastic modulus remains unchanged. Therefore, the overcurrent threshold can be adjusted by controlling the sliding seat to move closer to or further away from the first sealing ring through the adjusting component.

[0007] Gas enters the cavity of the valve body through the intake channel and the flow component. The gas outlet channel of the valve body is opened or closed by the transmission mechanism. When the gas outlet channel is open, the gas timer valve is open and gas is supplied normally. When the gas outlet channel is closed by the transmission mechanism, the gas timer valve is closed.

[0008] Furthermore, the adjusting component is a flow-adjusting shaft, which is threadedly connected to the valve body. One end of the flow-adjusting shaft extends into the intake channel. The end of the flow-adjusting shaft located within the intake channel is hemispherical, frustum-shaped, or conical. The end of the sliding seat away from the first sealing ring has a chamfer, and the end of the flow-adjusting shaft located within the intake channel abuts against the chamfer of the sliding seat. An adjusting groove is provided at the end of the flow-adjusting shaft away from the intake channel. By configuring the flow-adjusting shaft, during upward / downward movement, the sliding seat can be moved towards / away from the first sealing ring, thereby adjusting the flow threshold of the flow-through device and achieving rapid adjustment of the flow threshold. The adjusting groove facilitates the rotation of the flow-adjusting shaft.

[0009] Furthermore, the outer surface of the valve body is provided with a groove, within which, from bottom to top, are a sealing gasket and a limiting cap. The top of the sealing gasket abuts against the bottom of the limiting cap. One end of the flow-regulating shaft with an adjusting groove is located inside the limiting cap. The top of the limiting cap has an adjusting hole, located directly above the flow-regulating shaft, which extends into the adjusting hole. The bottom of the groove has a first threaded hole, which penetrates the valve body and communicates with the air intake channel. The diameter of the first threaded hole is smaller than the diameter of the groove, and the flow-regulating shaft is threaded into the first threaded hole. The limiting cap and adjusting hole allow the flow-regulating shaft to rotate through the adjusting hole while preventing it from extending beyond the limiting cap, thus avoiding gas leakage due to the flow-regulating shaft detaching from the valve body.

[0010] Furthermore, the regulating shaft is wider at the top and narrower at the bottom. An annular groove is located in the middle of the outer wall of the wider end of the regulating shaft, and a sealing gasket is fitted into the groove. The narrower end of the regulating shaft is threaded into a first threaded hole, extending into the air intake channel and abutting against the chamfer of the sliding seat. A circular adjusting block is integrally formed at the end of the regulating shaft away from the sliding seat; the diameter of the adjusting block is smaller than the diameter of the wider end of the regulating shaft, and an adjusting groove is provided on the adjusting block. By providing an annular groove and a sealing gasket on the outer wall of the wider end of the regulating shaft, gas leakage from the connection between the regulating shaft and the valve body can be effectively prevented, improving the safety and reliability of the gas timer valve. In addition, the design of the wider-than-narrow regulating shaft and the structure of abutting against the chamfer of the sliding seat allow for precise control of the sliding seat's movement distance when the regulating shaft is rotated, thereby achieving precise adjustment of the flow threshold of the flow control device. This meets the different gas flow requirements in different application scenarios, improving the applicability of the gas timer valve. The adjustment groove on the adjustment block allows users to easily rotate it using tools (such as screwdrivers), making flow adjustment more convenient. Furthermore, the diameter of the circular adjustment block is smaller than the diameter of the larger end of the flow control shaft, facilitating operation without compromising the overall structural compactness.

[0011] Furthermore, a retaining ring is integrally formed on the outer wall of the first sealing ring. The diameter of the outlet end of the air inlet channel is smaller than the outer diameter of the retaining ring. One side of the retaining ring is sealed against the inner wall of the outlet end of the valve body, and the end of the return spring away from the sliding seat is sealed against the other side of the retaining ring. The retaining ring helps to improve the stability of the first sealing ring installation, thereby improving the sealing performance.

[0012] Furthermore, the transmission mechanism includes a mounting cover and a rotating shaft. The bottom of the mounting cover has a downwardly protruding mounting block with a horizontal through hole. A push shaft is horizontally slidably connected within the through hole. The push shaft has two coaxial shoulders located on the same side of the mounting block. The mounting cover has a vertical connecting hole, and the rotating shaft is rotatably connected within the connecting hole. The top of the rotating shaft is fixedly connected to the upper cover of the valve. The top of the mounting cover is equipped with a mechanism for driving the upper cover of the valve to deflect. The bottom of the rotating shaft is fixedly connected to the lower cover of the valve. The lower cover of the valve has a U-shaped groove, and the push shaft is engaged within the U-shaped groove. The two shoulders are located on opposite sides of the U-shaped groove. An adjusting spring is sleeved on the push shaft. One end of the adjusting spring is fixedly connected to the mounting block, and the other end abuts against the adjacent shoulder. During operation, the coil spring on the mechanism releases its elasticity, causing the closing plate of the mechanism to deflect the valve cover to a certain extent. Since the valve cover and valve cap are fixedly connected to the two ends of the rotating shaft, the rotating shaft rotates, transmitting the rotational motion to the valve cap. With the cooperation of the adjusting spring and the shoulder, the push shaft moves towards the air inlet end of the valve body, causing the shoulder on the push shaft away from the mounting block to disengage from the air outlet end of the valve body, thus opening the valve. After a preset time, the mechanism stops working, the closing plate disengages from the valve cover, and the push shaft returns to its initial position under the action of the adjusting spring. This then causes the push shaft to move towards the air outlet end of the valve body. The shoulder on the push shaft away from the mounting block seals the air outlet end of the valve body, closing the valve. The U-shaped groove engagement between the push shaft and the valve cap, along with the limiting effect of the shoulder, ensures the accuracy and stability of power transmission, avoiding problems such as power failure or inaccurate output, loosening or detachment of connecting parts, thereby improving the overall reliability of the safety valve.

[0013] Furthermore, an L-shaped baffle is integrally formed on the lower cover of the valve. The end of the baffle away from the lower cover extends to the end of the push shaft away from the lower cover, and the end of the push shaft away from the lower cover abuts against the baffle. During the process of the mechanism driving the rotating shaft to rotate, thereby causing the lower cover of the valve to deflect, the baffle can quickly push the push shaft to one side of the rotating shaft, thus improving its responsiveness. In addition, the adjusting spring cooperates with the baffle to ensure that the push shaft is always subjected to the combined action of the shoulder and the baffle, preventing the push shaft from loosening or falling off.

[0014] Furthermore, the cavity of the valve body is also equipped with an indicator dial, which includes a transparent cover and a base with a central hole. The upper surface of the base has a blind hole, and an opaque indicator plate is fixedly connected to the upper surface of the base. The indicator plate has a clearance hole, and the upper surface of the indicator plate is engraved with pointers, warnings, and operating instructions around the clearance hole. The outer wall of the indicator plate has a notch extending to the clearance hole. A downwardly extending fixing rod is provided at the center of the transparent cover, and the fixing rod is rotatably connected to the central hole via the clearance hole. A transparent engraving is fixedly connected to the fixing rod. The dial is located inside the blind hole and below the indicator dial, with the dial 1.5–2.5 mm from the bottom of the blind hole. The dial has time markings and a coaxial arc-shaped clearance that is coaxial with the fixed rod. The dial has a cut that extends from one end of the clearance to the outer edge of the dial, with the free end of the cut located at the notch. A protective cover is fitted onto the transparent cover. The movement includes a coil spring and a movement shaft for driving the fixed rod. The movement shaft is fixedly connected to the fixed rod, and the base is fixedly connected to the movement.

[0015] Currently, some timer valves rely on purely mechanical mechanisms to display the time status. These products primarily employ two time indication methods: one uses a traditional thin pointer and dial design, making time reading difficult when the pointer is thin and the dial content is complex; the other uses a red semi-transparent component instead of a pointer, which rotates out when the time needs to be indicated. However, this red component primarily relies on a small, protruding pointer to indicate the time, and while the large area of ​​red provides clear visibility, it can easily lead to confusion regarding accurate time indication. Although both time indication methods can achieve good time indication, when applied to specific fields, especially gas timer valves where operating instructions, warnings, and other textual information need to be displayed, the interface must show not only the scale but also the operating methods and warnings. This results in very small fonts and scales, making it difficult for users to quickly and accurately read the time. Users may also easily overlook important warnings, increasing the risk of misoperation and accidents. These problems are more pronounced when the user is at a certain distance from the dial, making the time display unclear and warnings inconspicuous, thus affecting the safe use of the product.

[0016] This design places multiple time scales separately on the main dial, while the pointer, warning messages, and operating instructions are placed on the indicator dial. This allows the pointer, warning messages, operating instructions, and time scales to be set larger for easy viewing. Before use, the base of the indicator dial is fixedly connected to the movement of the mechanical timer valve, and the fixing rod is connected to the movement shaft.

[0017] Initially, the dial is hidden beneath the indicator dial, making the warnings and operating instructions on the indicator dial clearly visible and providing better guidance for safe operation. When the indicator dial is in operation, rotating the transparent cover clockwise causes the dial to rotate, partially obscuring the indicator dial. As the dial rotates out, the time markings on the dial become visible, and the pointer indicates the current time. When the transparent cover is released, the spring in the movement releases its tension, and the movement, under the action of a specific mechanism, begins to rotate the dial and transparent cover in opposite directions. At this point, the indicator dial enters the timekeeping function (countdown).

[0018] In this design, the larger time markers on the dial are gradually covered by an opaque sub-dial throughout the countdown, with fewer and fewer markers displayed, truly embodying the concept of a countdown. The hands are specially designed to be prominent and remain fixed, allowing users to accurately read the remaining time. Furthermore, the dial is transparent, so even when the time markers are rotated above the indicator dial, the warnings and operating instructions on the sub-dial are still visible, providing further reminders to the user and enhancing safety.

[0019] Furthermore, a second threaded hole is provided at the center of the top of the movement shaft, and a fastening screw is threaded into the second threaded hole. A through hole for the movement shaft to pass through is provided along the axial direction of the fixing rod. A guide hole coaxial with the through hole and communicating with it is provided on the top of the transparent cover. The fastening screw passes through the guide hole and is threaded into the second threaded hole. The second threaded hole and the guide hole allow for quick fixing or detachment of the fixing rod from the movement shaft.

[0020] Furthermore, the top of the transparent cover is provided with a circular mounting groove, which is coaxial with the guide hole. The diameter of the mounting groove is larger than that of the guide hole. A second washer is provided inside the mounting groove. A fastening screw passes through the second washer and the guide hole and is fixedly connected to the second threaded hole. A cap is provided inside the mounting groove, and the second washer and the fastening screw are located inside the cap. The mounting groove and the second washer ensure that the fixing rod and the movement shaft are better fixed. The cap prevents the second washer and the fastening screw from being directly exposed, making the top of the time status indicator device more aesthetically pleasing. Attached Figure Description

[0021] Figure 1 This is a perspective view of a flow-adjustable gas timing valve according to an embodiment of the present invention;

[0022] Figure 2 for Figure 1 A longitudinal sectional view;

[0023] Figure 3 for Figure 1 Exploded view;

[0024] Figure 4 for Figure 1 Schematic diagram of the transmission mechanism;

[0025] Figure 5 for Figure 4 Exploded view;

[0026] Figure 6 for Figure 1 Exploded view of the central indicator dial after it is connected to the movement;

[0027] Figure 7 for Figure 6 A diagram showing the state of the indicator dial when it is not in operation;

[0028] Figure 8 for Figure 6 A diagram showing the status of the indicator dial during operation;

[0029] Figure 9 for Figure 1 Exploded view of the intermediate flow-through component after partial connection with the valve body intake channel end;

[0030] Figure 10 for Figure 1 A longitudinal sectional view of the intermediate flow assembly after partial connection with the valve body intake passage. Detailed Implementation

[0031] The following detailed description illustrates the specific implementation method:

[0032] The reference numerals in the accompanying drawings include: valve body A, indicator dial B, operating method B1, pointer B2, warning text B3, time scale B4, outlet connection assembly C, flow assembly D, transmission mechanism E, outlet connector 1, third sealing ring 2, second bushing 3, air outlet passage 4, fourth sealing ring 5, push shaft 6, adjusting spring 7, mounting cover 8, rotating shaft 9, valve closing cover 10, mechanism 11, base 12, scale dial 13, indicator dial 14, transparent cover 15, protective cover 16, cap 17, valve closing cover 18, sealing gasket 19, flow adjustment shaft 20, first sealing ring 21, return spring 22, valve core 23, sliding seat 24, flow spring 25, end cover 26, limit cap 27.

[0033] The basic implementation examples are as follows: Figures 1-3As shown: A flow-adjustable gas timer valve includes a valve body A, which has a cavity. An inlet channel and an outlet channel 4, communicating with the cavity, are respectively provided on opposite sides of the valve body A. A transmission mechanism E for opening or closing the outlet channel 4 of the valve body A is provided within the cavity. An outlet connection assembly C is provided within the outlet channel 4. The outlet connection assembly C includes an outlet connector 1 and a second bushing 3. The second bushing 3 is fixed within the outlet channel 4, and the outlet connector 1 is fixedly connected within the second bushing 3. A third sealing ring 2 is provided at the contact point between the outlet connector 1 and the outlet channel 4 to ensure sealing.

[0034] Transmission mechanism E as attached Figures 4-5 As shown, the device includes a mounting cover 8, a rotating shaft 9, and a mechanism 11 that drives the rotating shaft 9 to deflect. The mounting cover 8 divides the cavity inside the valve body A into upper and lower parts. A fourth sealing ring 5 is provided between the mounting cover 8 and the inner wall of the valve body A to ensure a tight connection. Three columns are fixedly connected to the top of the mounting cover 8, and the mechanism 11 is fixedly connected to the mounting cover 8 through the columns. The bottom of the mounting cover 8 has a downwardly protruding mounting block with a horizontal through hole. A first bushing is provided in the through hole, and a push shaft 6 is horizontally slidably connected in the first bushing. The push shaft 6 has two shoulders coaxial with it, located on the same side of the mounting block. The shoulder away from the mounting block is used to seal the air outlet of the valve body A. The mounting cover 8 has a vertical connecting hole, and the rotating shaft 9 is rotatably connected in the connecting hole. The mounting cover 8 has two annular mounting grooves, and a second sealing ring is fitted inside the mounting grooves. To improve the stability of the rotating shaft 9 during rotation, the upper and lower ends of the mounting cover 8 are integrally formed with connecting shafts. The connecting shafts are coaxial with the connecting holes, and the rotating shaft 9 passes through the connecting shafts and is rotatably connected to them. The top of the rotating shaft 9 is fixedly connected to the upper valve cover 10, and the bottom of the rotating shaft 9 is fixedly connected to the lower valve cover 18. Both the upper valve cover 10 and the lower valve cover 18 are plastic parts. More specifically, both ends of the rotating shaft 9 are D-axis. The upper valve cover 10 and the lower valve cover 18 are provided with D-holes that mate with the D-axis. The rotating shaft 9 is fixedly connected to the upper valve cover 10 and the lower valve cover 18 by locking screws. The locking screws are coaxial with the rotating shaft 9, and a first washer is provided at the connection between the locking screws and the upper valve cover 10 and the lower valve cover 18.

[0035] In addition, the valve lower cover 18 includes a columnar connecting part and a snap-fit ​​part and a baffle integrally formed on the connecting part. The connecting part is provided with a D hole and is fixedly connected to the bottom of the rotating shaft 9. The snap-fit ​​part is "U"-shaped with the open end away from the connecting part. The open end of the snap-fit ​​part is a U-shaped groove. The push shaft 6 is snapped into the U-shaped groove. The two shoulders are located on both sides of the U-shaped groove. An adjusting spring 7 is sleeved on the push shaft 6. One end of the adjusting spring 7 is fixedly connected to the mounting block, and the other end abuts against the shoulder adjacent to it. The baffle is "L"-shaped. The end of the baffle connected to the connecting part is perpendicular to the snap-fit ​​part. The other end of the baffle is parallel to the snap-fit ​​part. The end of the baffle away from the connecting part extends to the end of the push shaft 6 away from the connecting part. The end of the push shaft 6 away from the connecting plate abuts against the baffle.

[0036] The cavity of valve body A is also provided with an indicator dial B, as shown in the attached figure. Figures 6-8 As shown, the device includes a transparent cover 15 and a base 12 with a central hole. The upper surface of the base 12 has a circular blind hole. An opaque indicator disc 14 is fixedly connected to the upper surface of the base 12. Specifically, the indicator disc 14 is glued to the base 12. The indicator disc 14 has a clearance hole, and the upper surface of the indicator disc 14 is engraved with a pointer B2, a warning message B3, and an operating method B1 around the clearance hole. The outer wall of the indicator disc 14 has a notch extending to the clearance hole. A protective cover 16 is fitted onto the transparent cover 15. A downward-extending fixing rod is provided at the center, and the fixing rod is rotatably connected to the center hole via a clearance hole; a transparent dial 13 is fixedly connected to the fixing rod, the dial 13 is located inside the blind hole and below the indicator dial 14, the dial 13 is mm away from the bottom of the blind hole, the dial 13 is provided with a time scale B4, the dial 13 is provided with a coaxial arc-shaped clearance opening coaxial with the fixing rod, the dial 13 is provided with a cut, the cut extends from one end of the clearance opening to the outer edge of the dial 13, and the free end of the cut of the dial 13 is located at the notch.

[0037] The movement 11 includes a coil spring and a movement shaft for driving the fixed rod. The movement shaft is fixedly connected to the fixed rod, and the base 12 is fixedly connected to the movement 11 by a fixing screw. A second threaded hole is provided at the center of the top of the movement shaft, and a fastening screw is threaded into the second threaded hole. A through hole for the movement shaft to pass through is provided along the axial direction of the fixed rod. The top of the transparent cover 15 has a guide hole coaxial with the through hole and the two are connected. The top of the transparent cover 15 has a circular mounting groove, which is coaxial with the guide hole. The diameter of the mounting groove is larger than the diameter of the guide hole. A second washer is provided in the mounting groove. The fastening screw passes through the second washer and the guide hole and is fixedly connected to the second threaded hole. A cap 17 is detachably connected in the mounting groove. The second washer and the fastening screw are located in the cap 17 to improve aesthetics.

[0038] The intake passage is equipped with a flow-through component D, as shown in the attached figure. Figures 9-10As shown, it includes an adjustment component, a valve core 23, a first sealing ring 21, a return spring 22, a flow spring 25, and a sliding seat 24. The air intake channel is a circular channel, and the diameter of the outlet end of the air intake channel is smaller than the diameter of the inlet end. The inner wall of the inlet end of the valve body A is provided with an expansion hole, and the side wall of the inlet end of the expansion hole is chamfered to facilitate the installation of pipes.

[0039] A fixing ring is integrally formed on the outer wall of the first sealing ring 21. One side of the fixing ring is sealed against the inner wall of the air outlet end of the air inlet channel of the valve body A. One end of the return spring 22 is against the other side of the fixing ring, and the other end of the return spring 22 is against the sliding seat 24.

[0040] The sliding seat 24 is cylindrical and located inside the valve body A with a clearance fit between the two, the clearance value being 0 to 0.04 mm. One end of the sliding seat 24 is open, and the outer wall of the open end of the sliding seat 24 is chamfered. The other end of the sliding seat 24 has evenly distributed air inlet holes for gas passage. A fixed post is provided at the center of the sliding seat 24, and the fixed post is coaxial with the sliding seat 24. A guide hole is provided at the center of the fixed post. The open end of the sliding seat 24 faces the expansion hole.

[0041] The valve core 23 includes a connecting rod, an end cap 26, and a circular baffle. The baffle is fixedly connected to the middle of the connecting rod, and the end cap 26 is threaded to one end of the connecting rod. The diameter of the baffle is larger than the outer diameter of the first sealing ring 21. The end of the connecting rod away from the end cap 26 extends through and into the return spring 22. The baffle is located inside the return spring 22 with a gap between them, i.e., the baffle does not contact the return spring 22. The end of the connecting rod connected to the end cap 26 passes through the guide hole of the fixed post and is slidably connected to it. The sliding seat 24 is located between the end cap 26 and the baffle. The overcurrent spring 25 is sleeved on the connecting rod, and the two ends of the overcurrent spring 25 abut against the sliding seat 24 and the end cap 26, respectively. In the initial state, the distance between the baffle and the first sealing ring 21 is 5 mm.

[0042] The regulating assembly includes a flow-adjusting shaft 20, a limit cap 27, and a sealing gasket 19. The top of the valve body A has a circular groove, and the bottom of the groove has a first threaded hole. The first threaded hole penetrates the upper wall of the valve body A and communicates with the air intake passage. The diameter of the first threaded hole is smaller than the diameter of the groove. The flow-adjusting shaft 20 is wider at the top and narrower at the bottom. An annular groove is located in the middle of the outer wall of the larger end of the flow-adjusting shaft 20, and the sealing gasket 19 is fitted into the annular groove. The smaller end of the flow-adjusting shaft 20 is tapered and threaded into the first threaded hole. The smaller end of the flow-adjusting shaft 20 extends into the air intake passage, and the flow-adjusting shaft 20 is located within the air intake passage. One end of the flow regulating shaft 20 rests against the chamfer of the sliding seat 24. A circular adjusting block is integrally formed at the end of the flow regulating shaft 20 away from the sliding seat 24. The diameter of the adjusting block is smaller than the diameter of the larger end of the flow regulating shaft 20, and the adjusting block has a straight adjusting groove. The opening end of the limiting cap 27 faces downwards. The opening of the limiting cap 27 is circular and its diameter is equal to the outer diameter of the larger end of the flow regulating shaft 20. The adjusting block is located inside the limiting cap 27. The top of the limiting cap 27 has an adjusting hole that communicates with its opening and is coaxial with it. The diameter of the adjusting hole is smaller than the outer diameter of the larger end of the flow regulating shaft 20, and the adjusting hole is located directly above the flow regulating shaft 20. The return spring 223 has a length of 15 mm and an elastic coefficient of 6.9 g / mm; the overcurrent spring 256 has a length of 12 mm and an elastic coefficient of 0.2 g / mm.

[0043] The specific implementation process is as follows:

[0044] Install outlet connection assembly C: Fix the second bushing 3 inside the air outlet channel 4, then fix the outlet connector 1 inside the second bushing 3, and ensure that the contact part between the outlet connector 1 and the air outlet channel 4 is provided with a third sealing ring 2 to ensure sealing.

[0045] Install the transmission mechanism E: Install the fourth sealing ring 5 between the mounting cover 8 and the inner wall of the valve body A to ensure a tight connection. Then, fix the core 11 to the top of the mounting cover 8 via the column. Place the first bushing in the through hole of the bottom mounting block of the mounting cover 8, and then slide the push shaft 6 horizontally into the first bushing, ensuring that the two shoulders on the push shaft 6 are on the same side of the mounting block. Rotate the rotating shaft 9 into the vertical connecting hole on the mounting cover 8, and improve the smoothness of the rotation of the rotating shaft 9 through the connecting shaft. Fit the second sealing ring into the mounting groove on the rotating shaft 9. Connect the upper valve cover 10 and the lower valve cover 18 to the two ends of the rotating shaft 9 through the D-axis and D-hole, and fix them with locking screws. At the same time, place the first washer at the connection between the locking screw and the upper valve cover 10 and the lower valve cover 18. The push shaft 6 is snapped into the U-shaped groove of the valve lower cover 18 and fitted with the adjusting spring 7. One end of the adjusting spring 7 is fixed on the side of the mounting block facing the shaft shoulder, and the other end abuts against the shaft shoulder adjacent to it. In the initial state, the shaft shoulder away from the mounting block faces the outlet connector 1 and seals it.

[0046] Install indicator dial B: Attach the opaque indicator dial 14 to the upper surface of the base 12 using adhesive, ensuring the clearance holes, notches, and the engraved pointer B2, warning text B3, and operating method B1 on the indicator dial 14 are accurately positioned. Secure the transparent dial 13 to the fixing rod of the transparent cover 15, positioning it within the blind hole on the upper surface of the base 12 and below the indicator dial 14, maintaining a specific distance between the dial 13 and the bottom of the blind hole. Slide the transparent cover 15 onto the protective cover 16, and secure the fixing rod to the movement shaft via the second threaded hole at the top of the movement shaft, the fastening screw, the second washer, and the guide hole. Finally, install the cap 8 in the mounting slot to improve aesthetics.

[0047] Install the flow-through assembly D: Install the first sealing ring 21 at the outlet end of the air intake channel, ensuring that the fixing ring side on the outer wall of the first sealing ring 21 is sealed against the inner wall of the outlet end of the air intake channel of the valve body A. Install the return spring 22 between the first sealing ring 21 and the sliding seat 24, so that both ends of the return spring 22 abut against the walls of the valve body A and the sliding seat 24 respectively. Install the valve core 23, fix the baffle to the middle of the connecting rod, thread the end cap 26 to one end of the connecting rod, so that the end of the connecting rod away from the end cap 26 extends through and into the return spring 22, the baffle is located inside the return spring 22 with a gap between them, the end of the connecting rod connected to the end cap 26 passes through the guide hole of the fixing post at the center of the sliding seat 24 and slides with it, the flow-through spring 25 is sleeved on the connecting rod, and both ends abut against the sliding seat 24 and the end cap 26 respectively. Install the adjustment assembly, fit the sealing gasket 19 onto the annular groove on the outer wall of the larger end of the flow adjustment shaft 20, thread the tapered part of the smaller end of the flow adjustment shaft 20 into the first threaded hole at the bottom of the groove on the top of the valve body A, so that it extends into the air intake channel and abuts against the chamfer of the sliding seat 24, install the limit cap 27 on the top of the valve body A, so that the adjustment block is located inside the limit cap 27, and the adjustment hole is located directly above the flow adjustment shaft 20.

[0048] In use, when it is necessary to reduce the threshold of the flow control device, a tool (such as a screwdriver) is inserted into the adjustment slot on the adjusting block of the flow control shaft 20, and the flow control shaft 20 is rotated. During the rotation, the smaller tapered end of the flow control shaft 20 pushes the sliding seat 24 towards the first sealing ring 21. The sliding seat 24 drives the valve core 23, the flow spring 25, and the end cover 26 to move towards the first sealing ring 21, thereby reducing the distance between the end face of the baffle and the first sealing ring 21. At this time, if the inlet flow increases, the valve core 23 is pressed in. Since the distance between the end face of the baffle and the first sealing ring 21 is reduced, with the spring elastic modulus remaining unchanged, the flow spring 25 only needs a smaller flow to achieve the contact between the baffle and the first sealing ring 21, thus closing the valve.

[0049] Conversely, when it is necessary to increase the threshold of the overcurrent device, the flow regulating shaft 20 is rotated in the opposite direction, controlling the sliding seat 24 to move away from the first sealing ring 21. This causes the sliding seat 24, valve core 23, and overcurrent spring 25 to move away from the first sealing ring 21, increasing the distance between the end face of the baffle and the first sealing ring 21. If the inlet flow rate increases at this time, the valve core 23 is pressed in. Because the distance between the end face of the baffle and the first sealing ring 21 increases, the overcurrent spring 25 requires a larger flow rate to achieve the contact between the baffle and the first sealing ring 21, thus closing the valve, while keeping the spring's elastic modulus constant.

[0050] Timer function:

[0051] In the initial state, the dial 13 is hidden below the prompt dial 14, making the warning text B3 and operation method B1 on the prompt dial 14 clearly visible, which can better remind the user to perform safe operation.

[0052] When dial B is working, by rotating the transparent cover 15 clockwise, the transparent cover 15 drives the scale 13 to rotate. The scale 13 begins to rotate out and thus partially covers the indicator dial 14. When the scale 13 rotates out, the time scale B4 on the scale 13 is displayed. The time scale B4 corresponding to the pointer B2 is the current time.

[0053] When the transparent cover 15 is released, the coiled spring on the movement 11 begins to release its elasticity. Under the action of a specific mechanism, the movement 11 begins to drive the scale 13 and the transparent cover 15 to rotate in opposite directions. At this time, the indicator dial B begins to enter the timing function (countdown).

[0054] Throughout the countdown, the larger time scale B4 is gradually covered by the opaque indicator dial 14, with fewer and fewer scale markings displayed, truly embodying the concept of a countdown. The pointer B2 remains prominently displayed and fixed, allowing the user to accurately read the remaining time. Simultaneously, the dial 13 is transparent, so even when the time scale B4 is rotated above the indicator dial, the warning message B3 and operating instructions B1 on the indicator dial 14 are still visible, further reminding the user and enhancing safety.

[0055] Valve on / off control:

[0056] When in use, the coil spring on the mechanism 11 releases its elastic force, causing the closing plate of the mechanism 11 to drive the valve cover 10 to deflect to a certain extent. Since the valve cover 10 and the valve cover 18 are fixedly connected to the two ends of the rotating shaft 9, the rotating shaft 9 rotates and transmits the rotation to the valve cover 18. With the cooperation of the adjusting spring 7 and the shoulder, the push shaft 6 will move towards the air inlet end of the valve body A, so that the shoulder on the push shaft 6 away from the mounting block is disengaged from the air outlet end of the valve body A, thereby realizing the opening of the valve.

[0057] After the preset time is reached, the mechanism 11 stops working, the closing plate of the mechanism 11 disengages from the valve cover 10, and the push shaft 6 returns to its initial position under the action of the adjusting spring 7, thereby driving the push shaft 6 to move towards the air outlet of the valve body A. After the shoulder of the push shaft 6 away from the mounting block seals the air outlet of the valve body A, the valve is closed.

[0058] The above descriptions are merely embodiments of the present invention, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A flow-adjustable gas timing valve, comprising a valve body, a cavity within the valve body, an inlet channel and an outlet channel communicating with the cavity on opposite sides of the valve body, and a transmission mechanism for opening or closing the outlet channel of the valve body within the cavity; the inlet channel is provided with a flow-through component, characterized in that: The flow-through assembly includes a first sealing ring, a return spring, a valve core, a sliding seat, a flow-through spring, and an end cap, sequentially arranged within the air intake channel. The first sealing ring is fixed to the air outlet end of the air intake channel. The return spring is located between the first sealing ring and the sliding seat, with its two ends abutting against the walls of the valve body and the sliding seat, respectively. The valve core includes a connecting rod and a circular baffle fixedly connected to the connecting rod. The diameter of the baffle is larger than the outer diameter of the first sealing ring. The sliding seat has evenly distributed air intake holes for gas passage. One end of the connecting rod passes through the sliding seat and is slidably connected to it. The baffle is located inside the return spring, with a gap between them. The end cap is threaded onto the connecting rod at the end furthest from the return spring. The overcurrent spring is sleeved on the connecting rod, with its two ends abutting against the sliding seat and the end cap, respectively. The valve body is provided with an adjusting component for controlling the sliding seat's proximity to or distance from the first sealing ring. The adjusting component is a flow-adjusting shaft, threadedly connected to the valve body. One end of the flow-adjusting shaft extends into the intake channel. The end of the flow-adjusting shaft within the intake channel is hemispherical, frustum-shaped, or conical. The end of the sliding seat furthest from the first sealing ring has a chamfer, and the end of the flow-adjusting shaft within the intake channel abuts against the chamfer of the sliding seat. The end of the flow-adjusting shaft furthest from the intake channel has an adjusting groove. The valve body... The outer surface of the valve body is provided with a groove, and a sealing gasket and a limiting cap are arranged sequentially from bottom to top in the groove. The top of the sealing gasket abuts against the bottom of the limiting cap. One end of the flow-adjusting shaft with an adjustment groove is located inside the limiting cap. The top of the limiting cap has an adjustment hole, which is located directly above the flow-adjusting shaft, and the flow-adjusting shaft extends into the adjustment hole. The bottom of the groove has a first threaded hole, which penetrates the valve body and communicates with the air intake channel. The diameter of the first threaded hole is smaller than the diameter of the groove. The flow-adjusting shaft is threaded into the first threaded hole. The transmission mechanism includes a mounting cover and a rotating shaft. The bottom of the mounting cover has a downwardly protruding mounting block, and the mounting block has a horizontal through hole. A push shaft is horizontally slidably connected to the inner part of the mounting block. The push shaft has two coaxial shoulders located on the same side of the mounting block. The mounting cover has a vertical connecting hole, and the rotating shaft is rotatably connected to the connecting hole. The top of the rotating shaft is fixedly connected to the upper cover of the valve. The top of the mounting cover is equipped with a mechanism for driving the upper cover of the valve to deflect. The bottom of the rotating shaft is fixedly connected to the lower cover of the valve. The lower cover of the valve has a U-shaped groove, and the push shaft is engaged in the U-shaped groove. The two shoulders are located on both sides of the U-shaped groove. An adjusting spring is sleeved on the push shaft. One end of the adjusting spring is fixedly connected to the mounting block, and the other end abuts against the adjacent shoulder.

2. The flow-adjustable gas timing valve according to claim 1, characterized in that: The airflow adjustment shaft is wider at the top and narrower at the bottom. The outer wall of the larger end of the airflow adjustment shaft has an annular groove in the middle, and a sealing gasket is fitted in the annular groove. The smaller end of the airflow adjustment shaft is threaded into the first threaded hole. The smaller end of the airflow adjustment shaft extends into the air intake channel and abuts against the chamfer of the sliding seat. The end of the airflow adjustment shaft away from the sliding seat has a circular adjusting block integrally formed. The diameter of the adjusting block is smaller than the diameter of the larger end of the airflow adjustment shaft, and the adjusting groove is set on the adjusting block.

3. The flow-adjustable gas timing valve according to claim 2, characterized in that: A fixing ring is integrally formed on the outer wall of the first sealing ring. The diameter of the outlet end of the air inlet channel is smaller than the outer diameter of the fixing ring. One side of the fixing ring is sealed against the inner wall of the outlet end of the valve body. The end of the reset spring away from the sliding seat is against the other side of the fixing ring.

4. A flow-adjustable gas timing valve according to any one of claims 1 to 3, characterized in that: An "L"-shaped baffle is integrally formed on the lower cover of the valve. The end of the baffle away from the lower cover of the valve extends to the end of the push shaft away from the lower cover of the valve, and the end of the push shaft away from the lower cover of the valve abuts against the baffle.

5. The flow-adjustable gas timing valve according to claim 4, characterized in that: The valve body's cavity also houses an indicator dial, which includes a transparent cover and a base with a central hole. The upper surface of the base has a blind hole, and an opaque indicator disc is fixedly connected to the upper surface of the base. The indicator disc has a clearance hole, and the upper surface of the indicator disc is engraved with pointers, warnings, and operating instructions around the clearance hole. The outer wall of the indicator disc has a notch extending into the clearance hole. A downward-extending fixing rod is located at the center of the transparent cover, and the fixing rod is rotatably connected to the central hole via the clearance hole. A transparent scale is fixedly connected to the fixing rod. The dial is located inside the blind hole and below the indicator dial, with the dial 1.5 to 2.5 mm from the bottom of the blind hole. The dial has time markings and a coaxial arc-shaped clearance on it. The dial also has a cut that extends from one end of the clearance to the outer edge of the dial, with the free end of the cut located at the notch. A protective cover is fitted onto the transparent cover. The mechanism includes a coil spring and a mechanism shaft for driving the fixed rod. The mechanism shaft is fixedly connected to the fixed rod, and the base is fixedly connected to the mechanism.

6. The flow-adjustable gas timing valve according to claim 5, characterized in that: The center of the top of the movement shaft is provided with a second threaded hole, and a fastening screw is threaded into the second threaded hole. The axis of the fixing rod is provided with a through hole for the movement shaft to pass through. The top of the transparent cover is provided with a guide hole coaxial with the through hole and the two are connected. The fastening screw passes through the guide hole and is threaded into the second threaded hole.

7. A flow-adjustable gas timing valve according to claim 6, characterized in that: The top of the transparent cover is provided with a circular mounting groove, which is coaxial with the guide hole. The diameter of the mounting groove is larger than the diameter of the guide hole. A second washer is provided in the mounting groove. A fastening screw passes through the second washer and the guide hole and is fixedly connected to the second threaded hole. A cap is provided in the mounting groove, and the second washer and the fastening screw are located in the cap.

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