A gas timer valve with automatic reset for overcurrent flow

Abstract

This solution discloses a flow-over-automatic reset gas timing valve in the field of safety valve technology. It includes a valve body with a cavity, and inlet and outlet channels communicating with the cavity on both sides. A flow-over component is installed within the inlet channel, consisting of a flow-over valve core, a reset valve core, and a fixed seat with an inlet passage. A filter seat and a reset seat with a through hole are installed in the inlet channel, with a first sealing ring installed at the end of the reset seat facing the filter seat. The two ends of the flow-over valve core are slidably connected between the filter seat and the reset seat, and connected to the reset seat via a flow-over spring. One end of the reset valve core is slidably connected to the reset seat, and the other end contacts the flow-over valve core and is located at the outlet passage, and is equipped with a reset spring with a spring force less than that of the flow-over spring. When the gas flow returns to normal, this design enables the flow-over component to automatically return to its initial state, thereby ensuring the normal operation of the system. This mechanism helps improve safety and efficiency, ensuring a stable and reliable gas supply.

Description

Technical Field

[0001] This invention belongs to the field of safety valve technology, and specifically relates to a gas timing valve with automatic reset for overflow. Background Technology

[0002] In the field of gas safety, such as for gas and toxic gases, the flow control device plays a crucial role when safety valves (such as timer valves, solenoid valves, and electric valves) use flow control devices as accessories. When the flow rate increases to the maximum value designed for flow control, or when the outlet pipe becomes detached leading to underpressure, or when the pipe pressure is too high, the flow control device will automatically close the valve to ensure that no safety hazards arise due to overflow, underpressure, or overpressure. However, once the flow control device cuts off the gas flow, even if the flow rate returns to normal or the pipe is replaced, external intervention is usually required, along with a reset mechanism, to manually reset the flow control device and restore the safety valve to normal operation. Summary of the Invention

[0003] The present invention aims to provide a gas timing valve with automatic reset for overflow, so as to realize the automatic reset of the overflow component after the gas flow returns to normal.

[0004] This solution discloses an automatic reset gas timer valve with overflow, comprising a valve body with a cavity. 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. An overflow assembly is provided within the inlet channel, comprising an overflow valve core, a reset valve core, and a fixed seat with an inlet passage. A filter seat and a reset seat with a through hole are sequentially fixed within the inlet channel. A first sealing ring is provided at the end of the reset seat facing the filter seat. The two ends of the overflow valve core are slidably connected to the filter seat and the reset seat, respectively. The overflow valve core has an outlet channel for gas passage, and an overflow spring is connected to the overflow valve core, with one end of the overflow spring abutting against the reset seat. One end of the reset valve core is slidably connected to the reset seat, and the other end of the reset valve core abuts against the overflow valve core and is located at the outlet channel. A reset spring is provided on the reset valve core, with one end of the reset spring abutting against the reset seat. The spring force of the reset spring is less than that of the overflow spring.

[0005] The working principle and benefits of this solution are as follows: Since the force of the return spring is less than that of the overcurrent spring, when gas flows into the safety valve inlet from this device, if the flow rate increases, the resulting pressure approaches the force of the return spring, causing the return valve core to move towards the return seat. As the flow rate continues to increase, the resulting pressure exceeds the force of the overcurrent spring, causing the overcurrent valve core to also move towards the return seat until it makes tight contact with the first sealing ring, completing the overcurrent protection and cutting off the gas flow. Because the force of the return spring is less than that of the overcurrent spring, the return valve core is fully pressed in before it contacts the first sealing ring. When the flow rate gradually decreases and returns to its normal value, the overcurrent valve core is simultaneously acted upon by both the overcurrent spring and the return spring, generating sufficient force to overcome the adhesion between the overcurrent valve core and the first sealing ring, completing the automatic reset.

[0006] In addition, when underpressure occurs, the pressure at the outlet decreases or disappears, while the pressure at the inlet remains. At this time, the device cannot complete automatic reset, thus better eliminating the safety hazards caused by gas leakage.

[0007] Furthermore, multiple reset valve cores are provided, and these multiple reset valve cores are arranged in a ring around a reset seat. The reset seat includes a connecting pipe and a fixing ring fixedly connected to the connecting pipe. The fixing ring and the connecting pipe are coaxial, and the end of the connecting pipe away from the filter seat is fixedly connected to the fixing seat. The reset valve cores are slidably connected to the fixing ring. The fixing ring has an equal number of guide tubes as the reset valve cores. The guide tubes extend in the same direction as the connecting pipe and pass through the fixing ring. The reset valve cores are slidably connected inside the guide tubes, and a reset spring abuts against the end of the guide tube facing the filter seat. Reinforcing ribs are evenly distributed at the connection between the connecting pipe and the fixing ring. By setting multiple reset valve cores and circling them around the reset seat, the force exerted by the reset valve cores on the filter valve cores is more uniform. The guide tubes ensure the guiding effect on the reset valve cores while reducing the thickness of the fixing ring, thus reducing production costs. The reinforcing ribs help to improve the service life of the fixing ring.

[0008] Furthermore, the end of the connecting pipe away from the filter seat has a constriction, and a sealing gasket is fitted at the constriction. The fixing seat has a placement groove for cooperating with the sealing gasket. The inner wall of the end of the connecting pipe near the filter seat has a fixing groove for placing the first sealing ring, and the first sealing ring extends outside the fixing groove. The sealing gasket and placement groove help to better ensure the sealing performance at the connection between the reset seat and the fixing seat. The fixing groove can better fix the first sealing ring, and the fact that the first sealing ring extends outside the fixing groove makes the sealing performance better when the flow valve core contacts the first sealing ring, ensuring the gas cut-off effect.

[0009] Furthermore, the flow control valve core includes a connecting rod and a second baffle fixedly connected to the connecting rod. The air outlet is located on the second baffle and is either an air outlet hole or a second notch. A fixing block is fixedly connected inside the connecting pipe, and a gap is left between the fixing block and the inner wall of the connecting pipe to allow gas to pass through. The two ends of the connecting rod are slidably connected to the fixing block and the filter seat, respectively. The flow control spring is sleeved on the connecting rod and is located between the second baffle and the fixing block. The air outlet is a plurality of second notches, which are evenly distributed on the outer edge of the second baffle. The setting of the second notches helps the gas to directly act on the reset valve core through the second notches.

[0010] Furthermore, the reset valve core includes a guide rod and a support plate fixedly connected to one end of the guide rod. The end of the guide rod away from the support plate is slidably connected in the corresponding guide tube. The reset spring is sleeved on the guide rod and is located between the support plate and the guide tube. The support plate abuts against the second notch of the second baffle.

[0011] 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.

[0012] Furthermore, an L-shaped first baffle is integrally formed on the lower cover of the valve. The end of the first 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 first baffle. During the process of the mechanism driving the rotating shaft to rotate, thereby causing the lower cover of the valve to deflect, the first baffle can quickly push the push shaft to move to one side of the rotating shaft, thus improving its responsiveness. In addition, the adjusting spring cooperates with the first baffle, ensuring that the push shaft is always subjected to the combined action of the shaft shoulder and the first baffle, preventing the push shaft from loosening or falling off.

[0013] 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 first notch extending to the clearance hole. A fixing rod extending downward 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 on it, which is coaxial with the fixed rod. 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 first 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.

[0014] 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.

[0015] 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.

[0016] 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).

[0017] 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.

[0018] 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.

[0019] 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

[0020] Figure 1This is a perspective view of a gas timing valve with automatic reset for overflow according to an embodiment of the present invention;

[0021] Figure 2 for Figure 1 A longitudinal sectional view;

[0022] Figure 3 for Figure 1 Exploded view;

[0023] Figure 4 for Figure 1 Schematic diagram of the transmission mechanism;

[0024] Figure 5 for Figure 4 Exploded view;

[0025] Figure 6 for Figure 1 Exploded view of the dial after it is connected to the movement;

[0026] Figure 7 for Figure 6 A diagram showing the state of the indicator dial when it is not in operation;

[0027] Figure 8 for Figure 6 A diagram showing the status of the indicator dial during operation;

[0028] Figure 9 for Figure 1 3D view of the current-carrying component;

[0029] Figure 10 for Figure 9 Exploded view of medium-flow overcurrent components;

[0030] Figure 11 for Figure 9 A longitudinal sectional view. 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 symbol B3, Time scale B4, Outlet connection assembly C, 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, Anti-corrosion 16. Protective cover 17. Cap 18. Lower cover of valve 19. Flow assembly 19. Filter seat 191. Flow valve core 192. Second baffle 1921. Second notch 1922. Flow spring 193. First sealing ring 194. Reset valve core 195. Support plate 1951. Guide rod 1952. Reset spring 196. Reset seat 197. Connecting pipe 1971. Guide pipe 1972. Fixing ring 1973. Sealing gasket 198. Fixing seat 199.

[0033] The basic implementation examples are as follows: Figures 1-3 As shown: A flow overcurrent automatic reset 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 4-5As 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 first 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 shaft 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 fixed to the mounting block, and the other end abuts against the adjacent shaft shoulder. The first baffle is "L"-shaped. The end of the first baffle connected to the connecting part is perpendicular to the snap-fit ​​part. The other end of the first baffle is parallel to the snap-fit ​​part. The end of the first 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 first baffle.

[0036] The cavity of valve body A is also provided with an indicator dial B, as shown in the attached figure. Figures 6-8As 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 first 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 superior 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 first 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 assembly 19, as shown in the attached figure. Figures 9-11 As shown, the device includes a fixed base 199, a reset base 197, a filter base 191, an overflow valve core 192, a reset valve core 195, a first sealing ring 194, a sealing gasket 198, an overflow spring 193, and three reset springs 196. The fixed base 199 is cylindrical, and both ends of the fixed base 199 are chamfered. One end of the fixed base 199 is provided with an air intake channel with a circular cross-section, and the other end of the fixed base 199 is provided with a mounting hole. The diameter of the mounting hole is smaller than the diameter of the air intake channel. The air intake channel is connected to the mounting hole, and the mounting hole, the air intake channel, and the fixed base 199 are coaxial. The fixed base 199 is provided with a mounting groove, which is located at the connection between the air intake channel and the mounting hole.

[0039] The filter base 191 is cylindrical, with an open end and a chamfered end for easy installation. The other end of the filter base 191 has evenly distributed filter holes. A fixing post is located at the center of the bottom of the filter base 191, and a guide hole is located at the center of the fixing post. The filter base 191 is installed into the air intake of the fixing base 199 by a tight fit. The filter base 191 is located at the end of the air intake away from the mounting hole, and the open end of the filter base 191 faces the mounting hole.

[0040] The reset seat 197 includes a connecting tube 1971 and a retaining ring 1973 integrally formed on the connecting tube 1971. The retaining ring 1973 is coaxial with the connecting tube 1971. Three guide tubes 1972 are evenly distributed on the retaining ring 1973. The guide tubes 1972 extend in the same direction as the connecting tube 1971 and pass through the retaining ring 1973. Three reinforcing ribs are evenly distributed at the connection between the connecting tube 1971 and the retaining ring 1973. A cross is fixedly connected inside the connecting tube 1971. The fixing block is shaped like a wire with a connecting hole at its center; one end of the connecting pipe 1971 has a constriction, and the inner wall of the other end of the connecting pipe 1971 has a fixing groove. The first sealing ring 194 is fixed in the fixing groove by adhesive and extends outside the fixing groove; the sealing gasket 198 is sleeved on the constriction of the connecting pipe 1971 and is fixed in the mounting groove by a tight fit. The constriction of the connecting pipe 1971 is fixed in the mounting hole of the fixing seat 199 by a tight fit.

[0041] The flow valve core 192 includes a connecting rod and a second baffle 1921 fixedly connected to the connecting rod. The second baffle 1921 is circular, and its diameter is smaller than the aperture of the opening end of the filter seat 191. Second notches 1922 are evenly distributed on the outer edge of the second baffle 1921 for gas to pass through. The two ends of the connecting rod slide in the guide hole of the fixed column and the connecting hole of the fixed block, respectively. The flow spring 193 is sleeved on the connecting rod and passes through the first sealing ring 194. The flow spring 193 is located between the second baffle 1921 and the fixed block.

[0042] Three reset valve cores 195 are provided. Each reset valve core 195 includes a guide rod 1952 and a support plate 1951 integrally formed at one end of the guide rod 1952. The support plate 1951 is circular. The end of the guide rod 1952 away from the support plate 1951 is slidably connected to the corresponding guide tube 1972. Three reset springs 196 are respectively sleeved on the three guide rods 1952. The reset springs 196 are located between the support plate 1951 and the guide tube 1972. The support plate 1951 abuts against the second notch 1922 of the second baffle 1921. The total elastic force of the three reset springs 196 is less than that of the overcurrent spring 193. The specific implementation process is as follows:

[0043] 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.

[0044] 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.

[0045] Install indicator dial B: Attach the opaque indicator dial 14 to the upper surface of the base 12 using adhesive, ensuring the clearance hole, first notch, and the engraved pointer B2, warning message B3, and operating method B1 on the indicator dial 14 are accurately positioned. Secure the transparent scale 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 scale 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.

[0046] Install the flow-through assembly 19: Install the flow-through assembly 19 in the air intake passage of valve body A, and the filter seat 191 is located on the side of the air intake passage away from the cavity of valve body A.

[0047] In the initial state, the dial 13 is hidden below the indicator dial 14, making the warning text B3 and operating method B1 on the indicator dial 14 clearly visible, which can better guide the user to perform safe operation. The push shaft 6 is in the initial position under the action of the adjusting spring 7, and the shoulder of the push shaft 6 away from the mounting block seals the air outlet of the valve body A, realizing valve closure. The overflow valve core 192 is in the initial position under the action of the overflow spring 193, and the reset valve core 195 is held against the air outlet of the overflow valve core 192 under the action of the reset spring 196.

[0048] In use, rotating the transparent cover 15 clockwise causes the dial 13 to rotate, partially obscuring the indicator dial 14. As the dial 13 rotates out, the time scale B4 on it becomes visible, and the pointer B2 corresponding to the time scale B4 indicates the current time. Releasing the transparent cover 15 releases the spring on the movement 11, causing the movement 11 to rotate the dial 13 and the transparent cover 15 in opposite directions. At this point, the indicator dial B begins its timer function (countdown). Throughout the countdown, the larger time scale B4 is gradually covered by the opaque indicator dial 14, with fewer and fewer scales displayed, truly embodying the concept of a countdown. The pointer B2 remains prominent and fixed, allowing the user to accurately read the remaining time. In addition, the dial 13 is made transparent, so even if the time scale B4 of the dial 13 is rotated out to the top of the indicator, the warning message B3 and the operation method B1 on the prompt dial 14 can still be seen, thus reminding the user again and further improving the safety of use.

[0049] When the coil spring on the mechanism 11 releases its elastic force, it causes the closing plate of the mechanism 11 to deflect the upper valve cover 10 to a certain extent. Since the upper valve cover 10 and the lower valve cover 18 are respectively fixedly connected to the two ends of the rotating shaft 9, the rotating shaft 9 rotates and transmits the rotational motion to the lower valve cover 18. With the cooperation of the adjusting spring 7 and the shoulder, the push shaft 6 is driven to 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 disengages from the air outlet end of the valve body A, thereby opening the valve. At this time, gas flows in from the air inlet channel of the valve body A, passes through the flow assembly 19 and enters the cavity of the valve body A.

[0050] If the gas flow rate increases, the resulting pressure approaches the elastic force of the return spring 196, causing the return valve core 195 to move towards the return seat 197. As the flow rate continues to increase, the resulting pressure exceeds the elastic force of the overcurrent spring 193, causing the overcurrent valve core 192 to also move towards the return seat 197 until it comes into tight contact with the first sealing ring 194, completing the overcurrent protection and cutting off the gas flow. Because the elastic force of the return spring 196 is less than that of the overcurrent spring 193, the return valve core 195 is fully pressed in before the overcurrent valve core 192 contacts the first sealing ring 194. When the flow rate gradually decreases and returns to its normal value, the overcurrent valve core 192 is simultaneously acted upon by both the overcurrent spring 193 and the return spring 196, generating sufficient elastic force to overcome the adsorption force between the overcurrent valve core 192 and the first sealing ring 194, thus completing the automatic reset.

[0051] 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-over-automatic reset gas timer 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-over component, characterized in that: The flow-through assembly includes a flow-through valve core, a reset valve core, and a fixed base with an air inlet. A filter seat and a reset seat with a through hole are sequentially fixedly connected within the air inlet. A first sealing ring is provided at the end of the reset seat facing the filter seat. The two ends of the flow-through valve core are slidably connected to the filter seat and the reset seat, respectively. The flow-through valve core has an air outlet for gas passage, and a flow-through spring is connected to it, with one end of the spring abutting against the reset seat. One end of the reset valve core is slidably connected to the reset seat, and the other end abuts against the flow-through valve core and is located at the air outlet. A reset spring is provided on the reset valve core, with one end abutting against the reset seat. The spring force of the reset spring is less than that of the flow-through spring. The transmission mechanism includes a mounting cover and a rotating shaft. The bottom of the cover has a downwardly protruding mounting block with a horizontal through hole. A push shaft is horizontally slidably connected inside the through hole. The push shaft has two coaxial shoulders located on the same side of the mounting block. The cover has a vertical connecting hole, and the rotating shaft is rotatably connected inside the connecting hole. The top of the rotating shaft is fixedly connected to the upper cover of the valve. The top of the cover has a mechanism for rotating the upper cover of the valve. 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 automatic reset gas timing valve for overcurrent as described in claim 1, characterized in that: The reset valve core is provided in multiple manner, and the multiple reset valve cores are arranged in a ring on the reset seat. The reset seat includes a connecting pipe and a fixing ring fixedly connected to the connecting pipe. The fixing ring and the connecting pipe are coaxial. The end of the connecting pipe away from the filter seat is fixedly connected to the fixing seat. The reset valve core is slidably connected to the fixing ring. The fixing ring is provided with a number of guide tubes equal to the number of reset valve cores. The guide tubes extend in the same direction as the connecting pipe and pass through the fixing ring. The reset valve core is slidably connected inside the guide tube. The reset spring abuts against the end of the guide tube facing the filter seat. Reinforcing ribs are evenly distributed at the connection between the connecting pipe and the fixing ring.

3. The automatic reset gas timing valve for overcurrent as described in claim 2, characterized in that: The end of the connecting pipe away from the filter seat has a constriction, and a sealing gasket is fitted at the constriction. The fixing seat has a placement groove for cooperating with the sealing gasket. The inner wall of the end of the connecting pipe near the filter seat has a fixing groove for placing the first sealing ring, and the first sealing ring extends outside the fixing groove.

4. The automatic reset gas timing valve for overcurrent as described in claim 3, characterized in that: The overflow valve core includes a connecting rod and a second baffle fixedly connected to the connecting rod. The air outlet is set on the second baffle and is an air outlet hole or a second notch. A fixing block is fixedly connected inside the connecting pipe, and a gap is left between the fixing block and the inner wall of the connecting pipe for gas passage. The two ends of the connecting rod are slidably connected to the fixing block and the filter seat, respectively. The overflow spring is sleeved on the connecting rod and is located between the second baffle and the fixing block.

5. The gas timing valve with automatic reset for overcurrent as described in claim 4, characterized in that: The air outlet is a plurality of second notches, which are distributed at the outer edge of the second baffle.

6. The gas timing valve with automatic reset for overcurrent as described in claim 5, characterized in that: The reset valve core includes a guide rod and a support plate fixedly connected to one end of the guide rod. The end of the guide rod away from the support plate is slidably connected in the corresponding guide tube. The reset spring is sleeved on the guide rod and is located between the support plate and the guide tube. The support plate abuts against the second notch of the second baffle.

7. A flow overcurrent automatic reset gas timing valve according to any one of claims 1 to 6, characterized in that: The lower cover of the valve is integrally formed with an "L"-shaped first baffle. The end of the first 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 first baffle.

8. The automatic reset gas timing valve for overcurrent as described in claim 7, 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 first 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 first 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.

9. A gas timing valve with automatic reset for overcurrent flow as described in claim 8, 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.

10. A gas timing valve with automatic reset for overcurrent flow as described in claim 9, 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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