Gas timing valve

Abstract

The present application relates to a kind of gas timing valve in the technical field of safety valve, containing valve body, there is cavity in valve body, its opposite sides are respectively equipped with air inlet, air outlet pipeline communicated with cavity, transmission assembly for opening and closing air outlet pipeline is equipped in cavity.The air outlet pipeline air outlet end is fixedly connected overflow reset device, the device includes button assembly, connector and overflow component in the air inlet passage of connector.Button assembly contains button cap, button guide sleeve and movement shaft, button cap is sleeved in one end of button guide sleeve, button guide sleeve is axially through and is equipped with annular boss.Movement shaft is stepped shaft, smaller end is fixed in button guide sleeve and button cap, reset spring is sleeved, and the both ends of spring are respectively abutted button cap inner top and annular boss;The diameter of larger end is greater than the inner diameter of annular boss, middle part is equipped with annular necking and is equipped with reset sealing ring, and the end away from button cap is conical.Connecting head has through-hole, button guide sleeve is fixed in through-hole, and the reliability of valve core reset after lifting gas overflow can be improved.

Description

Technical Field

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

[0002] In the field of gas safety, including for natural 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 components as accessories. Take a gas timer valve as an example (see attached image). Figure 1 As shown, the flow-through component is installed at the inlet end of the valve body of the gas timer valve, and the end with the filter seat is installed at the inlet end of the valve body. The outlet end of the valve body is connected to a gourd nozzle connector. Between the inlet end and the outlet end of the valve body, there is an opening valve core, a rotating shaft lever, and a rotating shaft that drives the rotating shaft lever to rotate. The rotating shaft is connected to the mechanism, and the mechanism drives the opening valve core to open the valve.

[0003] Overcurrent components (as attached) Figure 8 As shown, the device includes a fixed base with an air intake channel. Inside the air intake channel, there are sequentially arranged a conical sealing ring, a flow spring, a flow valve core, and a filter seat. The conical sealing ring is fixed to the air outlet end of the air intake channel. The flow valve core includes a connecting rod and a conical baffle fixedly connected to the connecting rod. The maximum diameter of the baffle is larger than the maximum inner diameter of the conical sealing ring. The flow spring is sleeved on the connecting rod, and its two ends abut against the wall of the fixed base and the baffle, respectively. The two ends of the connecting rod are slidably connected to the filter seat and the fixed base, respectively. The outer sealing ring is sleeved on the outer wall of the air outlet end of the fixed base.

[0004] When this type of gas timer valve is in use, gas enters from the inlet end of the valve body and passes through the flow-through assembly. When the gas flow is normal, the thrust generated by the gas is less than the elastic force of the flow-through spring, and the flow-through valve core will not move towards the conical sealing ring. However, as the flow continues to increase, the resulting pressure exceeds the elastic force of the flow-through spring, and the flow-through valve core will move towards the conical sealing ring until the flow-through valve core and the conical sealing ring are in tight contact and fit together (as shown in the attached figure). Figure 2 As shown), the gas supply is cut off, achieving overcurrent protection. When the gas flow returns to normal, the overcurrent valve core needs to be manually reset. The mechanism is manually rotated, which drives the shaft, which in turn drives the lever. The lever head then touches the tail of the overcurrent valve core (as shown). Figure 3 (As shown), this allows it to overcome the adhesion force between itself and the conical sealing ring. The lever head of the rotating shaft lever here cannot be made too long or too short. If it is too long, the lever head will be stuck by the overcurrent valve core, and the rotating shaft lever will not be able to reset. If it is too short, the lever head will not be able to touch the overcurrent valve core, and the overcurrent valve core will not be able to reset.

[0005] In actual use, due to differences in overcurrent pressure, assembly errors, and workpiece size, the position of the overcurrent valve core may vary. This can cause the rotating shaft lever to fail to move the overcurrent valve core or for the overcurrent valve core to block the rotating shaft lever from returning, resulting in overcurrent reset failure. Statistically, this occurs in about 3% of cases.

[0006] Therefore, it is essential to develop an overcurrent reset device that further improves the reliability of overcurrent valve core reset. Summary of the Invention

[0007] The present invention aims to provide a gas timing valve to ensure the reliability of the valve core reset after gas overflow.

[0008] To achieve the above objectives, the present invention adopts the following technical solution: a gas timing valve, comprising a valve body, a cavity within the valve body, an inlet pipe and an outlet pipe respectively communicating with the cavity on opposite sides of the valve body, a transmission assembly for opening or closing the outlet pipe of the valve body within the cavity, and an overcurrent reset device fixedly connected to the outlet end of the outlet pipe; the overcurrent reset device includes a button assembly, a connector, and an overcurrent assembly disposed within the inlet channel of the connector, the button assembly including a button cap, a button guide sleeve, and a motion shaft, the button cap being sleeved on one end of the button guide sleeve, and the button... The guide sleeve has a continuous axial direction. The button guide sleeve has an annular boss inside. The moving shaft is a stepped shaft. The smaller end of the moving shaft passes through the button guide sleeve and is fixedly connected to the button cap. A return spring is fitted on the smaller end of the moving shaft. The two ends of the return spring abut against the inner top of the button cap and the annular boss, respectively. The diameter of the larger end of the moving shaft is larger than the inner diameter of the annular boss. The middle of the larger end of the moving shaft has an annular constriction. A return sealing ring is provided at the constriction. The end of the moving shaft away from the button cap is conical. The connector head has a through hole, and the button guide sleeve is fixedly connected to the through hole.

[0009] The principle of this solution is as follows: During operation, the transmission component drives the valve core to open the valve. When the gas flow is too high, causing overflow, the overflow valve core moves towards the conical sealing ring until it is in tight contact with the ring, cutting off the gas supply and closing the valve. Then, manually pressing the button cap causes the moving shaft to descend and touch the overflow valve core, forcing it to spring back to its original position. Upon release, the return spring automatically resets the moving shaft and button cap. Throughout this process, the return sealing ring ensures a tight seal between the moving shaft and the button guide sleeve. The end of the moving shaft furthest from the button cap is conical; even if the overflow valve core's position deviates slightly, it can be pushed back, disengaging from the conical sealing ring.

[0010] Preferably, as an improvement, the outer wall of the button guide sleeve at the end away from the button cap is provided with threads, and the button guide sleeve is threadedly connected to the through hole via the threads. The threaded connection between the button guide sleeve and the through hole on the connector head ensures a tight seal and facilitates installation and removal.

[0011] Preferably, as an improvement, the outer wall of the button guide sleeve is provided with an annular flange coaxial with it, and an annular groove is provided on the side of the annular flange away from the button cap, and a fastening sealing ring is provided in the annular groove. The fastening sealing ring can further ensure the airtightness of the connection between the button guide sleeve and the connector.

[0012] Preferably, as an improvement, the connector includes an inlet connector and an outlet connector. The inlet end of the inlet connector is threadedly connected to the outlet end of the outlet pipe, and the outlet end of the inlet connector is sleeved on the inlet end of the outlet connector. The outlet connector has a shoulder, and a pressure cap is sleeved on the shoulder. The pressure cap is threadedly connected to the outlet end of the inlet connector. The through hole is provided on the outlet connector. The connector includes an inlet connector and an outlet connector, which are detachably connected for easy installation of flow-through components.

[0013] Preferably, as an improvement, the connection between the outlet connector and the inlet connector is provided with an annular groove, and an isolation sealing ring is provided within the groove. The isolation sealing ring helps to further ensure the sealing performance at the connection between the outlet connector and the inlet connector.

[0014] Preferably, as an improvement, the flow-through assembly includes a fixed base with an air intake channel. The fixed base is fixedly connected to the air intake end of the outlet connector. A conical sealing ring, a flow-through spring, a flow-through valve core, and a filter seat are sequentially arranged in the air intake channel of the fixed base. The conical sealing ring is fixed to the air outlet end of the air intake channel. The flow-through valve core includes a connecting rod and a conical baffle fixedly connected to the connecting rod. The maximum diameter of the baffle is larger than the maximum inner diameter of the conical sealing ring. The flow-through spring is sleeved on the connecting rod, and its two ends abut against the wall of the fixed base and the baffle, respectively. The two ends of the connecting rod are slidably connected to the filter seat and the fixed base, respectively. An outer sealing ring is provided at the connection between the fixed base and the outlet connector.

[0015] Preferably, as an improvement, the transmission assembly includes a mounting cover, a rotating shaft, and a mounting base. The mounting cover is fixedly connected to the valve body and divides the internal cavity of the valve body into upper and lower parts. The bottom of the mounting cover has a downwardly protruding mounting block, and the mounting block has a horizontally extending mounting hole. A valve core is horizontally slidably connected within the mounting hole. The valve core includes a push shaft and two first shoulders coaxial with it, the two first shoulders being 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. An upper lever is fixedly connected to the top of the rotating shaft, and a... A rotating shaft lever has a U-shaped groove, in which the push shaft is engaged. Two first shaft shoulders are located on opposite sides of the U-shaped groove. An adjusting spring is fitted on the push shaft, with one end fixedly connected to the mounting block and the other end abutting against the adjacent shaft shoulder. A mounting base is fixedly connected to the top of the mounting cover. A motor and a push screw assembly are mounted on the mounting base. The push screw assembly includes a screw and an outer nut threaded onto the screw. The outer nut has an integrally formed slider that is slidably connected to the mounting base. One end of the screw is fixedly connected to the output shaft of the motor, and the outer nut abuts against the upper lever.

[0016] When the valve is opened, the motor drives the screw to rotate. Because the slider is slidably connected to the mounting base, the outer nut connected to it cannot rotate with the screw, but instead moves along the screw. During this movement, the outer nut pushes the upper lever to rotate, which in turn drives the rotating shaft to rotate. Since the upper lever and the rotating shaft lever are fixedly connected to both ends of the rotating shaft, the rotating shaft's rotational motion transmits the force to the rotating shaft lever. With the cooperation of the adjusting spring and the first shoulder, the push shaft moves towards the air inlet end of the valve body, causing the first 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. The number of rotations of the motor output shaft can precisely control the movement distance of the outer nut, thereby controlling the deflection angle of the upper lever, adjusting the distance between the first shoulder and the air outlet end of the valve body, and achieving precise adjustment of the gas timer valve opening.

[0017] Preferably, as an improvement, a bushing is provided inside the mounting hole, and the push shaft is slidably connected inside the bushing. The bushing provided inside the mounting hole allows the push shaft to contact the bushing during sliding, reducing direct friction between the push shaft and the mounting block and extending the service life of both the push shaft and the mounting block.

[0018] Preferably, as an improvement, the rotating shaft is provided with an annular limiting groove, and a limiting sealing ring is fitted inside the limiting groove. The limiting sealing ring can effectively prevent gas leakage, improve the sealing performance of the safety valve, and ensure safe operation.

[0019] Preferably, as an improvement, a display device is fixedly connected to the top of the valve body. The display device includes a battery compartment and a panel assembly. The panel assembly includes a fixed cover and a panel fixed to its top. A display circuit board and a circuit protection cover are detachably connected in sequence inside the fixed cover. Multiple inserts are evenly distributed on the inner wall of the fixed cover. Multiple "L"-shaped slots that cooperate with the inserts are provided on the outer wall of the battery compartment. The slots extend downward from the top of the outer wall of the battery compartment. The battery compartment is fixedly connected to the top of the valve body. A battery is provided inside the battery compartment. The battery is connected to the display circuit board through a flexible connecting wire. The display circuit board is connected to the motor through a flexible connecting wire.

[0020] In use, the battery box is installed on top of the valve body using screws, and the valve body is installed on the gas pipeline. When the panel orientation needs to be adjusted, rotate the fixing cover to move the insert to the junction of the horizontal and vertical extensions of the slot, pull up the fixing cover to disengage the insert from the slot, thus detaching the panel assembly from the battery box. Then, adjust the position of the panel assembly according to the required orientation, align the insert on the fixing cover with the slot, press the insert down to the bottom of the slot, and rotate the fixing cover to move the insert to the horizontal extension of the slot, thus securing the fixing cover to the battery box.

[0021] Preferably, as an improvement, the panel is provided with a switch button, an "+" button for increasing time, a "-" button for decreasing time, a power indicator light, and an alarm light. The switch button, the "+" button for increasing time, the "-" button for decreasing time, the power indicator light, the alarm light, and the display screen are all mounted or soldered onto the display circuit board. A buzzer is also soldered onto the display circuit board, and they are connected through PCB traces on the circuit board. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of a gas timing valve in the prior art.

[0023] Figure 2 This is a schematic diagram showing the state when the flow valve core and the conical sealing ring are tightly fitted in the prior art.

[0024] Figure 3 This is a schematic diagram illustrating the state of the rotating shaft lever touching the overflow valve core in the existing technology.

[0025] Figure 4 This is a schematic diagram of the structure of a gas timing valve according to Embodiment 1 of the present invention.

[0026] Figure 5 for Figure 4 A longitudinal sectional view.

[0027] Figure 6 for Figure 4 A schematic diagram of the overcurrent reset device.

[0028] Figure 7 for Figure 6 An exploded view of the button component.

[0029] Figure 8 for Figure 6 Exploded view of the current-carrying component.

[0030] Figure 9 for Figure 4 A schematic diagram of the structure after removing the display device.

[0031] Figure 10 for Figure 9 A schematic diagram of a partial explosion.

[0032] Figure 11 for Figure 9 A bottom view of the transverse cross section.

[0033] Figure 12 for Figure 4 A schematic diagram of the structure of the display device.

[0034] Figure 13 for Figure 12 An exploded view of the display device.

[0035] Figure 14 for Figure 12 Exploded view of the middle panel assembly.

[0036] The reference numerals in the accompanying drawings include: valve body A, transmission assembly B, motor B1, mounting base B2, push screw assembly B3, screw B31, outer nut B32, upper lever B4, rotating shaft B5, mounting cover B6, valve core B7, mounting block B8, rotating shaft lever B9, overcurrent reset device C, inlet connector C1, pressure cap C2, isolation sealing ring C3, button assembly C4, reset sealing ring C41, constriction C42, motion shaft C43, button... Button guide sleeve C44, annular flange C45, return spring C46, ​​button cap C47, outlet connector C5, overcurrent assembly C6, filter seat C61, overcurrent valve core C62, overcurrent spring C63, conical sealing ring C64, fixing seat C65, outer sealing ring C66, display device E, panel E1, fixing cover E2, display circuit board E3, circuit protection cover E4, flexible connecting wire E5, battery E6, slot E7, battery box E8, plug block E9. Detailed Implementation

[0037] The following detailed description illustrates the specific implementation method: Example 1 is basically as shown in the appendix. Figures 4-14 As shown: A gas timer valve includes a valve body A, a transmission assembly B, an overcurrent reset device C, and a display device E; the valve body A has a cavity, and an inlet pipe and an outlet pipe communicating with the cavity are respectively provided on opposite sides of the valve body A. Transmission component B (as attached) Figures 9-11As shown, the device includes a mounting cover B6, a rotating shaft B5, and a mounting base B2. The mounting base B2 is mounted on the top of the mounting cover B6 with screws. A motor B1 and a push screw assembly B3 are mounted on the mounting base B2. The push screw assembly B3 includes a screw B31 and an outer nut B32 threaded onto the screw B31. The outer nut B32 has an integrally formed slider, which is located between the outer nut B32 and the motor B1. The slider is slidably connected to the mounting base B2. Specifically, the mounting base B2 has a limiting cavity. The slider is rectangular, and the opposite sides of the slider are in contact with and can slide relative to the walls on both sides of the limiting cavity. The slider and the walls on both sides of the limiting cavity are smooth. One end of the screw B31 is fixedly connected to the output shaft of the motor B1 through a coupling.

[0038] The bottom of the mounting cover B6 has a downwardly protruding mounting block B8. The mounting block B8 has a horizontally extending mounting hole through it. A bushing is installed inside the mounting hole, and a valve core B7 is connected inside the bushing. Specifically, the valve core B7 includes a push shaft and two first shoulders coaxial with it. The push shaft is horizontally slidably connected inside the bushing. The two first shoulders are located on the same side of the mounting block B8. The first shoulder furthest from the mounting block B8 is used to seal the air outlet end of the valve body A (i.e., the air inlet end of the air outlet pipe). The mounting cover B6 has a vertical connecting hole, and a rotating shaft B5 is rotatably connected inside the connecting hole. The rotating shaft B5 has two annular limiting grooves, and limiting sealing rings are fitted inside the limiting grooves. To improve… To ensure the smoothness of the rotation of the high-speed rotating shaft B5, the upper and lower ends of the mounting cover B6 are integrally formed with connecting shafts. The connecting shafts are coaxial with the connecting holes, and the rotating shaft B5 passes through the connecting shafts and is rotatably connected to them. The top of the rotating shaft B5 is fixedly connected to the upper lever B4, and the bottom of the rotating shaft B5 is fixedly connected to the rotating shaft lever B9. More specifically, both ends of the rotating shaft B5 are D-axis. The upper lever B4 and the rotating shaft lever B9 are provided with holes that mate with the D-axis. The rotating shaft B5 is fixedly connected to the upper lever B4 and the rotating shaft lever B9 by screws. The screws are coaxial with the rotating shaft B5, and washers are provided at the connection between the screws and the upper lever B4 and the rotating shaft lever B9. The outer nut B32 abuts against the upper lever B4.

[0039] In addition, the pivot lever B9 includes a columnar connecting part and a snap-fit ​​part and a first baffle integrally formed on the connecting part. The connecting part has a hole and is fixedly connected to the bottom of the pivot B5. 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 groove. The push shaft is snapped into the groove. Two first shoulders are located on both sides of the groove. An adjusting spring is sleeved on the push shaft. The adjusting spring is located between the push shaft and the first shoulders. One end of the adjusting spring is fixedly connected to the mounting block B8, and the other end abuts against the first shoulder adjacent to it. The first baffle is "U" shaped. The end of the first baffle connected to the connecting part is perpendicular to the snap-fit ​​part, and the other end of the first baffle is parallel to the snap-fit ​​part.

[0040] Overcurrent reset device C (as attached) Figure 6As shown, the device includes a button assembly C4, a connector, and a flow-through assembly C6 disposed within the air inlet channel of the connector. The connector includes an inlet connector C1 and an outlet connector C5. The inlet end of the inlet connector C1 is threadedly connected to the outlet end of the outlet pipe. The inlet end of the outlet pipe is connected to a connecting sealing ring coaxial with it. The inlet end of the inlet connector C1 is inserted into the connecting sealing ring to ensure the airtightness of the connection. The outlet end of the inlet connector C1 is sleeved on the inlet end of the outlet connector C5. The outlet connector C5 has a second shoulder, and a pressure cap C2 is sleeved on the second shoulder. The pressure cap C2 is threadedly connected to the outlet end of the inlet connector C1. The connection between the outlet connector C5 and the inlet connector C1 has an annular groove, and an isolation sealing ring C3 is disposed in the groove. The wall of the outlet connector C5 in the middle part has a through hole communicating with its internal channel. The through hole is a threaded hole, and the flow-through assembly C6 is located between the inlet connector C1 and the through hole. Overcurrent component C6 (as attached) Figure 8 As shown, the device includes a fixed seat C65 with an air intake channel. The fixed seat C65 is fixedly connected to the air intake end of the outlet connector C5. The air intake channel of the fixed seat C65 is provided with a conical sealing ring C64, a flow spring C63, a flow valve core C62, and a filter seat C61 in sequence. The conical sealing ring C64 is fixed to the air outlet end of the air intake channel. The flow valve core C62 includes a connecting rod and a conical second baffle fixedly connected to the connecting rod. The maximum diameter of the second baffle is larger than the maximum inner diameter of the conical sealing ring C64. The flow spring C63 is sleeved on the connecting rod, and the two ends of the flow spring C63 abut against the wall of the fixed seat C65 and the second baffle, respectively. The two ends of the connecting rod are slidably connected to the filter seat C61 and the fixed seat C65, respectively. An outer sealing ring C66 is provided at the connection between the fixed seat C65 and the outlet connector C5. The end of the filter seat C61 away from the fixed seat C65 abuts against the wall of the inlet connector C1. Button component C4 (as attached) Figure 7As shown, it includes a button cap C47, a button guide sleeve C44, and a motion shaft C43. The button cap C47 is sleeved on one end of the button guide sleeve C44, and the axial direction of the button guide sleeve C44 is continuous. The button guide sleeve C44 has an annular boss inside. The motion shaft C43 is a stepped shaft. The smaller end of the motion shaft C43 passes through the button guide sleeve C44 and is threaded to the button cap C47. A return spring C46 is sleeved on the smaller end of the motion shaft C43. The two ends of the return spring C46 abut against the inner top of the button cap C47 and the annular boss, respectively. The larger end of the motion shaft C43... The diameter of the moving shaft C43 is larger than the inner diameter of the annular boss. The middle of the larger end of the moving shaft C43 is provided with an annular constriction C42, and a reset sealing ring C41 is provided at the constriction C42. The end of the moving shaft C43 away from the button cap C47 is conical. The outer wall of the button guide sleeve C44 away from the button cap C47 is provided with threads, and the button guide sleeve C44 is connected to the through hole threaded through the threads. The outer wall of the button guide sleeve C44 is provided with an annular flange C45 coaxial with it. The annular flange C45 is provided with an annular groove on the side away from the button cap C47, and a fastening sealing ring is provided in the annular groove.

[0041] Display device E (as attached) Figures 12-14 As shown, the device includes a battery box E8 and a panel E1 assembly. The panel E1 assembly includes a fixing cover E2 and a panel E1 bonded to its top. A display circuit board E3 and a circuit protection cover E4 are detachably connected inside the fixing cover E2. Specifically, the fixing cover E2 has four connecting posts, and the circuit protection cover E4 has four screws detachably connected to it. The circuit protection cover E4 is threadedly connected to the connecting posts via screws. The display circuit board E3 has four arc-shaped clearance openings to avoid the connecting posts, and the display circuit board E3 is threadedly connected to the top inner part of the fixing cover E2 via screws. Four rectangular inserts E9 are evenly distributed on the inner wall of the fixing cover E2, and the four inserts E9 are located on the same circumferential surface. The outer wall of the battery box E8 has four "U"-shaped slots E7 that cooperate with the inserts E9, and the slots E7 extend downwards from the top of the outer wall of the battery box E8. The battery box E8 contains a battery E6, which is connected to the display circuit board E3 via a flexible connecting cable E5.

[0042] Panel E1 is equipped with a switch button, display screen, a time-up button "+", a time-down button "-", a power indicator light, and an alarm light. The switch button, time-up button, time-down button, power indicator light, alarm light, and display screen are all mounted or soldered onto the display circuit board E3. A buzzer is also soldered onto the display circuit board E3. The switch button, time-up button, time-down button, power indicator light, alarm light, display screen, and buzzer are all connected through the traces on the display circuit board E3.

[0043] The specific usage process is as follows: During use, install valve body A on the gas pipeline. When it is necessary to adjust the direction of panel E1, rotate the fixing cover E2 to move the insert E9 to the junction of the horizontal and vertical extensions of slot E7. Pull up the fixing cover E2 to disengage the insert E9 from slot E7, thus disengaging panel E1 from the battery box E8. Then, adjust the position of panel E1 according to the required direction, aligning the insert E9 on the fixing cover E2 with slot E7. Press the insert E9 down to the bottom of slot E7, and rotate the fixing cover E2 to move the insert E9 to the horizontal extension of slot E7, thus fixing the fixing cover E2 to the battery box E8.

[0044] When using display device E, pressing the switch on panel E1 will display the valve opening time, and display circuit board E3 will control motor B1 in valve body A to open the gas timer valve and allow gas to flow. The system defaults to opening the valve in minutes. To increase the time, press the "+" button on panel E1; to decrease the time, press the "-" button. Adjust the time as needed using the "+" and "-" buttons. After the time is set, the gas timer valve will start counting down. When the time reaches zero, the chip timer on display circuit board E3 will send a valve closing signal. This signal will control motor B1 in valve body A to close the gas timer valve and cut off the gas flow. During this period, if valve opening failure, valve closing failure, or motor B1 abnormality occurs, display circuit board E3 will control the alarm light to illuminate, and the display screen will show the error code. A buzzer soldered to display circuit board E3 will emit a "beep" sound as a warning. The display circuit board E3 monitors the voltage of battery E6 in real time to determine the remaining power. When the battery E6 voltage is lower than the set voltage, the power indicator light flashes and the buzzer emits a "beep" sound to alert the user.

[0045] When the valve is opened, the control motor B1 on the display circuit board E3 drives the screw B31 to rotate forward. Because the slider is slidably connected to the mounting base B2, the outer nut B32 connected to it cannot rotate with the screw B31, but instead moves along the screw B31. During this movement, the outer nut B32 pushes the upper lever B4 to rotate, which in turn drives the rotating shaft B5 to rotate. Since the upper lever B4 and the rotating shaft lever B9 are fixedly connected to both ends of the rotating shaft B5, the rotation of the rotating shaft B5 transmits the rotational motion to the rotating shaft lever B9. With the cooperation of the adjusting spring and the first shoulder, the push shaft moves towards the air inlet end of the valve body A, causing the first shoulder on the push shaft, away from the mounting block B8, to disengage from the air outlet end of the valve body A, thus opening the valve. The number of rotations of the output shaft of motor B1 can precisely control the moving distance of the outer nut B32, thereby controlling the deflection angle of the upper lever B4, adjusting the distance between the first shoulder and the air outlet end of the valve body A, and achieving precise adjustment of the gas timer valve opening. During valve opening, if the gas flow is too high and overflow occurs, the overflow valve core C62 moves towards the conical sealing ring C64. After the two come into close contact, manually pressing the button cap C47 causes the motion shaft C43 to descend and touch the overflow valve core C62, forcing it to spring back and reset. Upon release, the motion shaft C43 and the button cap C47 automatically reset under the action of the return spring C46. The end of the motion shaft C43 is beveled to accommodate installation and dimensional errors of the overflow valve core C62 itself, further improving its reset reliability.

[0046] When the gas delivery time reaches the predetermined time, the display circuit board E3 controls the motor B1 to drive the screw B31 to reverse, driving the screw B31 to rotate in the opposite direction until the outer nut B32 no longer applies force to the upward lever B4. The push shaft and the first shoulder return to the initial position under the restoring force of the adjusting spring, and the first shoulder closes the connecting seal ring to close the valve.

[0047] The only difference between Example 2 and Example 1 is that the pivot lever B9 does not include the first baffle. With the overcurrent reset device C, the first baffle is no longer needed to actuate the overcurrent valve core C62, thus eliminating the need for the first baffle.

[0048] In this embodiment, motor B1 is a geared motor manufactured by Shenzhen Dehong Motor Co., Ltd.

[0049] The above descriptions are merely embodiments of the present invention, and common knowledge such as specific technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solutions 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 implementation 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 gas timing valve, comprising a valve body, a cavity within the valve body, an inlet pipe and an outlet pipe communicating with the cavity on opposite sides of the valve body, and a transmission assembly for opening or closing the outlet pipe of the valve body within the cavity, characterized in that: An overcurrent reset device is fixedly connected to the outlet end of the air outlet pipe. The overcurrent reset device includes a button assembly, a connector, and an overcurrent component disposed in the air inlet channel of the connector. The button assembly includes a button cap, a button guide sleeve, and a moving shaft. The button cap is fitted onto one end of the button guide sleeve, and the axial direction of the button guide sleeve is through. An annular boss is provided inside the button guide sleeve. The moving shaft is a stepped shaft. The smaller end of the moving shaft passes through the button guide sleeve and is fixedly connected to the button cap. A reset spring is fitted onto the smaller end of the moving shaft. The two ends of the reset spring abut against the inner top of the button cap and the annular boss, respectively. The diameter of the larger end of the moving shaft is larger than the inner diameter of the annular boss. An annular constriction is provided in the middle of the larger end of the moving shaft, and a reset sealing ring is provided at the constriction. The end of the moving shaft away from the button cap is conical. A through hole is provided on the connector, and the button guide sleeve is fixedly connected to the through hole.

2. A gas timing valve according to claim 1, characterized in that: The outer wall of the button guide sleeve away from the button cap is provided with threads, and the button guide sleeve is threadedly connected to the through hole through the threads.

3. A gas timing valve according to claim 2, characterized in that: The outer wall of the button guide sleeve is provided with an annular flange coaxial with it, and an annular groove is provided on the side of the annular flange away from the button cap, and a fastening sealing ring is provided in the annular groove.

4. A gas timing valve according to claim 3, characterized in that: The connector includes an inlet connector and an outlet connector. The inlet end of the inlet connector is threaded to the outlet end of the outlet pipe, and the outlet end of the inlet connector is sleeved on the inlet end of the outlet connector. The outlet connector has a shoulder, and a pressure cap is sleeved on the shoulder. The pressure cap is threaded to the outlet end of the inlet connector. The through hole is provided on the outlet connector.

5. A gas timing valve according to claim 4, characterized in that: The connection between the outlet connector and the inlet connector is provided with an annular groove, and an isolation sealing ring is provided in the groove.

6. A gas timing valve according to claim 5, characterized in that: The flow-through assembly includes a fixed base with an air intake channel, which is fixedly connected to the air intake end of the outlet connector. The air intake channel of the fixed base contains, in sequence, a conical sealing ring, a flow-through spring, a flow-through valve core, and a filter seat. The conical sealing ring is fixed to the air outlet end of the air intake channel. The flow-through valve core includes a connecting rod and a conical baffle fixedly connected to the connecting rod. The maximum diameter of the baffle is larger than the maximum inner diameter of the conical sealing ring. The flow-through spring is sleeved on the connecting rod, and its two ends abut against the wall of the fixed base and the baffle, respectively. The two ends of the connecting rod are slidably connected to the filter seat and the fixed base, respectively. An outer sealing ring is provided at the connection between the fixed base and the outlet connector.

7. A gas timing valve according to claim 6, characterized in that: The transmission assembly includes a mounting cover, a rotating shaft, and a mounting base. The mounting cover is fixedly connected to the valve body and divides the internal cavity of the valve body into upper and lower parts. The bottom of the mounting cover has a downwardly protruding mounting block, and the mounting block has a horizontally penetrating mounting hole. A valve core is horizontally slidably connected within the mounting hole. The valve core includes a push shaft and two first shoulders coaxial with it, 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. An upper lever is fixedly connected to the top of the rotating shaft, and a rotating shaft lever is fixedly connected to the bottom of the rotating shaft. The rotating shaft lever is provided with a U-shaped groove, and the push shaft is engaged in the U-shaped groove. The two first shaft shoulders are respectively 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 shaft shoulder. The mounting base is fixedly connected to the top of the mounting cover. The mounting base is equipped with a motor and a push screw assembly. The push screw assembly includes a screw and an outer nut threaded onto the screw. The outer nut is integrally formed with a slider, which is slidably connected to the mounting base. One end of the screw is fixedly connected to the output shaft of the motor, and the outer nut abuts against the upper lever.

8. A gas timing valve according to claim 7, characterized in that: A bushing is provided inside the mounting hole, and the push shaft is slidably connected inside the bushing.

9. A gas timing valve according to claim 8, characterized in that: A display device is fixedly connected to the top of the valve body. The display device includes a battery compartment and a panel assembly. The panel assembly includes a fixed cover and a panel fixed to its top. A display circuit board and a circuit protection cover are detachably connected inside the fixed cover. Multiple inserts are evenly distributed on the inner wall of the fixed cover. Multiple "L"-shaped slots that cooperate with the inserts are provided on the outer wall of the battery compartment. The slots extend downward from the top of the outer wall of the battery compartment. The battery compartment is fixedly connected to the top of the valve body. A battery is contained in the battery compartment. The battery is connected to the display circuit board through a flexible connecting wire. The display circuit board is connected to the motor through a flexible connecting wire.

10. A gas timing valve according to claim 9, characterized in that: The panel is equipped with a power switch, an "+" button for increasing time, a "-" button for decreasing time, a power indicator light, and an alarm light. The power switch, the "+" button for increasing time, the "-" button for decreasing time, the power indicator light, the alarm light, and the display screen are all mounted or soldered onto the display circuit board. A buzzer is also soldered onto the display circuit board, and they are connected through PCB traces on the circuit board.

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