Flow self-adaptive gas timing valve

Abstract

The invention discloses a flow self-adaptive gas timing valve in the technical field of safety valves, which comprises a valve body with a cavity, and a gas inlet channel and a gas outlet channel are arranged on two sides of the valve body. And a transmission mechanism is arranged in the cavity. A flow passing assembly is arranged in the air inlet channel and is composed of a flow passing base, a transition assembly and two valve elements. The overflowing base is used for sequentially fixing the filter seat, the overflowing valve core seat and the adjusting valve core seat, and each valve core seat is provided with an overflowing hole and is provided with a sealing ring. The two valve elements comprise guide rods and sealing plates which are provided with overflowing springs and second adjusting springs respectively. The transition assembly comprises a transition sealing ring and a transition base with an opening in one end, is internally connected with a transition baffle in a sliding mode and is supported through a transition spring. And the transition baffle is matched with the transition sealing ring to realize fine control. The design utilizes springs with different elastic forces (an overflow spring gt; and the transition spring is larger than or equal to the second adjusting spring), so that the assembly can be automatically adjusted to a proper position when the flow changes, and the safety and adaptability of the gas valve are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of safety valves, and in particular relates to a flow adaptive gas timing valve. Background Art

[0002] In the field of gas safety such as fuel gas and toxic gas, safety valves (such as timing valves, solenoid valves, electric valves, etc.) play a vital role when using flow components as accessories. When the flow increases to the maximum value of the flow design, or the outlet pipe falls off and causes underpressure, the flow component will automatically close the valve to ensure that there is no safety hazard caused by overcurrent or underpressure.

[0003] However, working conditions vary significantly across industries and regions, meaning that the required safety valve flow thresholds will also vary. Safety valves are usually designed with a fixed flow setting (i.e., their thresholds are fixed), which can lead to false trips in some cases—even when the flow is within a safe and normal range, the valve may incorrectly close, interrupting service and affecting production efficiency or daily life. The traditional solution is to replace the safety valve or its internal flow components, but this is not only costly, but may also damage the original air tightness of the piping system, requiring additional maintenance and inspections. Summary of the invention

[0004] The present invention aims to provide a flow adaptive gas timing valve to improve the versatility of the gas timing valve.

[0005] A flow adaptive gas timing valve in the present scheme comprises a valve body, a cavity is arranged in the valve body, an air inlet channel and an air outlet channel connected to the cavity are arranged on opposite sides of the valve body respectively, and a transmission mechanism for opening or closing the air outlet channel of the valve body is arranged in the cavity; a flow component is arranged in the air inlet channel, and the flow component comprises a flow base, a transition component and two valve cores, a filter seat, a flow valve core seat and an adjusting valve core seat are fixedly connected in sequence in the flow base, and the flow valve core seat and the adjusting valve core seat are both provided with flow holes for gas to pass through , a flow sealing ring is provided in each flow hole, the two valve cores each include a guide rod and a sealing plate for sealing the flow sealing ring, the guide rod is fixedly connected to the center of the sealing plate, a second regulating spring and a flow spring are respectively sleeved on the two guide rods, the two guide rods pass through the two flow sealing rings respectively, one end of the flow spring and the second regulating spring are respectively abutted on the two sealing plates, the other ends of the flow spring and the second regulating spring are respectively abutted on the flow valve core seat and the regulating valve core seat, and the other end of the sealing plate abutted by the flow spring abuts The diaphragm is supported on the filter seat, and the other end of the sealing plate that is supported by the second regulating spring is supported on the flow valve core seat; the transition assembly includes a transition sealing ring and a transition base with an opening at one end, the open end of the transition base is fixedly connected to the end of the flow base away from the filter seat, and the end of the transition base away from the opening is evenly distributed with air outlet holes connected to the opening, a transition baffle is slidably connected in the transition base, a transition spring is supported at the center of the transition baffle, and the other end of the transition spring is supported on the inner bottom wall of the transition base, and the transition sealing ring is located at the regulating valve core seat and the transition baffle, a transition sealing ring is fixedly connected to the end of the regulating valve core seat away from the overflow valve core seat, the end of the transition baffle away from the transition spring is fitted with the transition sealing ring, and through holes are evenly distributed on the transition baffle and are connected with the overflow hole; the contact part between the regulating valve core seat and the transition sealing ring is evenly distributed with air inlet holes, the air inlet holes are connected with the gap between the regulating valve core seat and the overflow valve core seat, the transition sealing ring is evenly distributed with air holes, the air holes are connected with the air inlet holes, the elastic force of the overflow spring is greater than the elastic force of the transition spring ≥ the elastic force of the second regulating spring

[0006] The working principle and beneficial effects of this solution are as follows: the elastic force of the overcurrent spring>the elastic force of the transition spring≥the elastic force of the second adjusting spring. The elastic force of the overcurrent spring is within the maximum overcurrent value allowed by the standard. Exceeding this value can be understood as an abnormal value, which may cause safety hazards. Therefore, the elastic force of the overcurrent spring can be designed according to the maximum value allowed by the area. The overcurrent component is an accessory of the gas timing valve and is installed in the air inlet channel of the gas timing valve. In the initial state, the transition baffle blocks the air hole on the transition sealing ring, so that after the gas flows into the filter seat, it can only pass through the overcurrent sealing ring in the overcurrent valve core seat and the adjusting valve core seat, and then through the through hole on the transition baffle, and finally enter the cavity of the valve body from the air outlet hole on the transition base. When the flow rate increases, when the pressure generated by the airflow gradually increases to the elastic force of the second regulating spring, the guide rod in the regulating valve core seat and the sealing plate connected thereto move toward the side of the transition base until they are tightly fitted with the sealing plate and the flow sealing ring in the regulating valve core seat, cutting off the airflow from there into the cavity of the valve body. If the flow rate does not increase at this time, the flow assembly is in the valve closing state. Because the elastic force of the transition spring is close to the elastic force of the second regulating spring, if the flow rate continues to increase at this time (normal flow rate increase), the airflow enters through the air inlet hole, and then acts on the transition baffle through the air hole on the transition sealing ring. The pressure generated by the airflow can open the transition baffle, causing the transition baffle to move toward one side of the valve body cavity, thereby causing the airflow to enter the valve body cavity from the through hole of the transition baffle, and the gas timing valve is in a normal working state. If the flow rate continues to increase, even greater than the elastic force of the overcurrent spring (based on the above, the elastic force of the overcurrent spring is at the maximum overcurrent value allowed by the standard. When it is greater than the elastic force of the overcurrent spring, it can be determined as an overcurrent caused by a fault), the guide rod and the sealing plate connected to the overcurrent spring are pressed toward the overcurrent sealing ring side until they fit tightly, and the overcurrent component completely blocks the gas from entering the valve body, thereby achieving overcurrent protection.

[0007] This solution uses the mutual cooperation between the over-current spring, the second adjustment spring and the transition spring, combined with the joint action of other components, so that the gas timing valve can work normally within the normal fluctuation range of the gas flow pressure, avoiding the impact of the normal use of users due to the accidental closure, and also avoiding a large number of pipeline maintenance and safety valve replacement caused by the accidental closure of the gas timing valve. In addition, because the over-current component realizes flow self-adaptation, the gas timing valve can be applied to pipe network installation in a larger range and region, greatly improving its versatility.

[0008] Furthermore, an annular boss is integrally formed in the overflow base, and the overflow valve core seat and the regulating valve core seat are fixed on both sides of the boss respectively; the first sealing ring and the fifth sealing ring are respectively provided at the connection between the regulating valve core seat and the overflow valve core seat and the boss; a constriction is provided at the outer edge of the overflow valve core seat away from the filter seat, and the fifth sealing ring is sleeved at the constriction. The setting of the boss makes the installation of the overflow valve core seat and the regulating valve core seat more convenient, and the first sealing ring and the fifth sealing ring make the sealing of the connection between the overflow valve core seat and the regulating valve core seat and the boss better; the constriction facilitates the rapid connection and separation of the fifth sealing ring and the overflow valve core seat, and cooperates with the boss to help better achieve the sealing performance of the connection between the overflow valve core seat and the boss.

[0009] Furthermore, a guide tube is provided at one end of the overflow valve core seat and the regulating valve core seat away from the filter seat, the two guide rods are respectively slidably connected in the two guide tubes, the two guide tubes respectively extend into two overflow sealing rings, and the ends of the overflow spring and the second regulating spring away from the sealing plate are respectively sleeved on the corresponding guide tubes; the two sealing plates are at an equal distance from the corresponding guide tubes, and in the initial state, the end of the guide rod located in the overflow valve core seat away from the filter seat is abutted against the sealing plate between the overflow valve core seat and the regulating valve core seat; an annular groove is provided on the side of the transition sealing ring facing the transition baffle, the air hole is arranged at the groove, and an annular flange used in conjunction with the groove is provided on the transition baffle. The setting of the guide tube helps to improve the stability of the guide rod during movement. The overflow spring and the second adjusting spring are sleeved on the guide tube, which helps to improve the stability of the overflow spring and the second adjusting spring during compression / recovery. The two sealing plates are at an equal distance from the corresponding guide tubes. When the airflow pressure reaches the elastic force of the overflow spring, the overflow spring is compressed, and the two sealing plates respectively block the two overflow sealing rings, thereby achieving a better sealing effect. The coordinated use of the flange and the groove helps to improve the airtightness of the contact between the transition sealing ring and the transition baffle.

[0010] Furthermore, the transition baffle includes a sleeve and an annular retaining ring, the retaining ring is slidably connected in the transition base, the outer wall of the sleeve is evenly distributed with connecting rods, one end of the connecting rod away from the sleeve is fixedly connected to the inner wall of the retaining ring, and the gap between the connecting rod, the sleeve and the inner wall of the retaining ring constitutes the through hole; the sleeve is slidably sleeved on the guide tube of the regulating valve core seat. The retaining ring is slidably connected in the transition base, and the sleeve is slidably sleeved on the guide tube of the regulating valve core seat, so that the retaining ring is subject to dual restrictions of the guide tube and the transition base, thereby improving the sliding stability of the transition baffle.

[0011] Furthermore, the regulating valve core seat includes an annular regulating fixed seat and an regulating cylinder fixedly connected in the regulating fixed seat, the regulating cylinder and the regulating fixed seat are coaxial, the flow hole is arranged at the center of the regulating cylinder and penetrates through it, the air inlet holes are evenly distributed between the regulating cylinder and the regulating fixed seat, the flow sealing ring is fixedly connected in the regulating cylinder, the aperture of the flow hole is larger than the outer diameter of the sleeve, and the sleeve and the regulating cylinder are coaxial; one end of the guide tube is fixedly connected in the regulating cylinder, the transition sealing ring is sleeved on the regulating cylinder, and the flange is arranged on the side of the retaining ring facing the transition sealing ring. In the initial state, the air inlet hole is connected with the air hole, the air hole is blocked by the retaining ring, and the air flow enters the through hole through the flow hole in the regulating cylinder, and then enters the safety valve from the air outlet hole of the transition base. When the pressure reaches the elastic force of the second adjusting spring and is less than the elastic force of the overflow spring, the sealing plate seals the overflow sealing ring in the adjusting cylinder, and the airflow enters the air hole from the air inlet. When the airflow pressure reaches the elastic force of the transition spring, the airflow pushes the retaining ring and the sleeve to move to the side away from the filter seat, so that the airflow flows from the through hole to the air outlet and then enters the safety valve.

[0012] Furthermore, the transmission mechanism includes a mounting cover and a rotating shaft. A mounting block protruding downward is provided at the bottom of the mounting cover. The mounting block is provided with a horizontal through hole. A push shaft is horizontally slidably connected in the through hole. The push shaft is provided with two shoulders coaxial with the shaft, and the two shoulders are located on the same side of the mounting block; a vertical connecting hole is provided on the mounting cover, and the rotating shaft is rotatably connected in the connecting hole. The top of the rotating shaft is fixedly connected to the relevant valve upper cover, and a movement for driving the valve closing upper cover to deflect is installed on the top of the mounting cover. The bottom of the rotating shaft is fixedly connected to the relevant valve lower cover, and the valve closing lower cover is provided with a U-shaped groove, and the push shaft is clamped in the U-shaped groove, and the two shoulders are respectively located on both sides of the U-shaped groove. A first adjusting spring is sleeved on the push shaft, and one end of the first adjusting spring is fixedly connected to the mounting block, and the other end is abutted against the shoulder adjacent to it. When in use, the coil spring on the movement releases elastic force, causing the closing plate of the movement to drive the upper cover of the valve to deflect to a certain extent. Since the upper cover of the valve and the lower cover of the valve are fixedly connected to the two ends of the rotating shaft, the rotating shaft rotates and transmits to the lower cover of the valve at the same time. Under the cooperation of the first adjusting spring and the shoulder, the push shaft will be driven to move toward the air inlet end of the valve body, so that the shoulder of the push shaft away from the mounting block is separated from the contact with the air outlet end of the valve body, thereby opening the valve. After reaching the preset time, the movement stops working, the closing plate of the movement is separated from the upper cover of the valve, and the push shaft returns to the initial position under the action of the first adjusting spring, and then drives the push shaft to move toward the air outlet end of the valve body. After the shoulder of the push shaft away from the mounting block seals the air outlet end of the valve body, the valve is closed. Through the U-shaped groove clamping cooperation between the push shaft and the lower cover of the valve, and the limiting effect of the shoulder, the accuracy and stability of power transmission are ensured, avoiding the problems of power failure or inaccurate output, connection parts falling off, loosening, etc., thereby improving the overall reliability of the safety valve.

[0013] Furthermore, an "L"-shaped first baffle is integrally formed on the valve closing lower cover, and an end of the first baffle away from the valve closing lower cover extends to an end of the push shaft away from the valve closing lower cover, and an end of the push shaft away from the valve closing lower cover abuts against the first baffle. When the movement drives the rotating shaft to rotate, and then drives the valve closing lower cover to deflect, the first baffle can quickly push the push shaft to move to one side of the rotating shaft, thereby improving its responsiveness. In addition, the first adjustment spring cooperates with the first baffle, so that the push shaft is always acted upon by the shaft shoulder and the first baffle, thereby preventing the push shaft from loosening or falling off.

[0014] Furthermore, an indicator dial is also provided in the cavity of the valve body, and the indicator dial includes a transparent cover and a base provided with a center hole, the upper surface of the base is provided with a blind hole, an opaque prompt disk is fixedly connected to the upper surface of the base, an avoidance hole is provided on the prompt disk, a pointer, a warning word and an operation method are engraved on the upper surface of the prompt disk around the avoidance hole, and a first notch extending to the avoidance hole is provided on the outer wall of the prompt disk; a fixing rod extending downward is provided at the center of the transparent cover, and the fixing rod is rotatably connected to the center hole through the avoidance hole; a transparent engraved The dial is located in the blind hole and below the prompt plate, the dial is 1.5 to 2.5 mm away from the bottom of the blind hole, the dial is provided with a time scale, the dial is provided with a relief opening in the shape of an arc coaxial with the fixed rod, the dial is provided with a cutout, the cutout extends from one end of the avoidance opening to the outer edge of the dial, and the free end of the cutout of the dial is located at the first notch; a protective cover is provided on 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] At present, some timing valves are products that rely on pure mechanical mechanisms to drive the time status display. There are two main time indication methods for this type of product: one type uses the traditional thin pointer and dial design. When reading the time, it is difficult to read the time because the pointer is thin and the content of the dial is complex; the other type uses a red translucent part instead of a pointer, and the red part is turned out when the time needs to be indicated, but the red part mainly relies on a protruding small pointer to indicate the time, and although the large area of ​​red can play a significant eye-catching role, it is easy to cause confusion for the accurate indication of the time. Although both time indication methods can achieve time indication well, when they are applied to special fields, especially fields such as gas timing valves that require operation instructions, warnings and other text information, because the same interface needs to display not only the scale, but also the operation method, warnings and other text, the font and scale are very small, and users often find it difficult to read the time quickly and accurately, and are prone to ignore important warnings, thereby increasing the risk of misoperation and the possibility of accidents. These problems are more prominent when the user is at a certain distance from the dial, making the time display unclear and the warning words inconspicuous, which in turn affects the safe use of the product.

[0016] This solution sets more time scales separately on the dial, and then sets the pointer, warning words and operation methods on the indicator dial, so that the pointer, warning words, operation methods and time scales can be set larger for easy viewing. Before use, the base of the indicator dial is fixedly connected to the movement of the mechanical timing valve, and the fixing rod is connected to the movement shaft.

[0017] In the initial state, the dial is hidden under the prompt disk, so that the warning words and operation methods on the prompt disk are clearly visible, which can better remind the user to operate safely. When the indicator dial is working, by rotating the transparent cover clockwise, the transparent cover drives the dial to rotate, and the dial begins to rotate out and then covers part of the prompt disk. When the dial rotates out, the time scale on the dial is displayed, and the time scale corresponding to the pointer is the current timing time. When the transparent cover is released, the coil spring on the movement begins to release its elastic force, and the movement, under the action of a specific mechanism, begins to drive the dial and the transparent cover to rotate in opposite directions. At this time, the indicator dial begins to enter the timing function (countdown).

[0018] In the indicator dial of this solution, during the entire countdown process, the larger time scale is gradually covered by the opaque reminder disk, and the scale display becomes less and less, truly interpreting the concept of countdown. The pointer is specially eye-catching and fixed, so that users can accurately read the corresponding remaining time. In addition, the dial is set to be transparent. Even if the time scale of the dial is rotated out to the top of the indicator disk, the warning words and operation methods on the reminder disk can be seen, thereby reminding the user again and further improving the safety of use.

[0019] Furthermore, a second threaded hole is provided at the center of the top of the movement shaft, a fastening screw is threadedly connected in the second threaded hole, a through hole is provided in the axial direction of the fixing rod for the movement shaft to pass through, a guide hole coaxial with the through hole is provided on the top of the transparent cover and the two are connected, and the fastening screw passes through the guide hole and is threadedly connected to the second threaded hole. By setting the second threaded hole and the guide hole, the fixing rod and the movement shaft can be quickly fixed or separated.

[0020] Furthermore, a circular placement groove is provided on the top of the transparent cover, the placement groove is coaxial with the guide hole, the diameter of the placement groove is larger than the aperture of the guide hole, a second washer is provided in the placement groove, a fastening screw passes through the second washer and the guide hole and is fixedly connected with the second threaded hole, a cap is provided in the placement groove, and the second washer and the fastening screw are located in the cap. The placement groove and the second washer can better ensure that the fixing rod is fixed to the movement shaft, and the cap can prevent the second washer and the fastening screw from being directly exposed to the outside, making the top of the time status indicator more beautiful. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1A three-dimensional diagram of a flow adaptive gas timing valve according to an embodiment of the present invention;

[0022] Figure 2 for Figure 1 A longitudinal cross-sectional view of

[0023] Figure 3 for Figure 1 Exploded diagram of

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

[0025] Figure 5 for Figure 4 Exploded diagram of

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

[0027] Figure 7 for Figure 6 The state diagram of the indicator dial when it is not working;

[0028] Figure 8 for Figure 6 The state diagram of the indicator dial when working;

[0029] Fig. 9 for Figure 1 A three-dimensional diagram of the medium flow component;

[0030] Fig.10 for Fig. 9 Exploded diagram of

[0031] Fig.11 for Fig. 9 A longitudinal cross-sectional view of

[0032] Fig.12 for Fig.10 A three-dimensional view of the center regulating valve core seat. DETAILED DESCRIPTION

[0033] The following is further described in detail through specific implementation methods:

[0034] The reference numerals in the drawings of the specification include: valve body A, indicator dial B, operation method B1, pointer B2, warning word B3, time scale B4, outlet connection assembly C, transmission mechanism E, outlet joint 1, third sealing ring 2, second bushing 3, air outlet channel 4, fourth sealing ring 5, push shaft 6, first adjustment spring 7, installation cover 8, rotating shaft 9, valve closing upper cover 10, movement 11, base 12, dial 13, prompt plate 14, transparent cover 15, protective cover 16, cap 17, valve closing lower cover 18 , flow component D, transition base D1, transition spring D2, transition baffle D3, sleeve D31, retaining ring D32, flange D33, transition sealing ring D4, air hole D41, regulating valve core seat D5, adjusting fixing seat D51, regulating tube D52, air inlet hole D53, flow hole D54, guide tube D55, first sealing ring D6, flow sealing ring D7, guide rod D8, second adjusting spring D9, fifth sealing ring D10, flow spring D11, flow base D12, filter seat D13.

[0035] The embodiment is basically as shown in the attached Figures 1 to 3 As shown: a flow adaptive gas timing valve, including a valve body A, a cavity is provided in the valve body A, an air inlet channel and an air outlet channel 4 connected to the cavity are respectively provided on opposite sides of the valve body A, a transmission mechanism E is provided in the cavity for opening or closing the air outlet channel 4 of the valve body A; an outlet connection component C is provided in the air outlet channel 4, the outlet connection component C includes an outlet joint 1 and a second bushing 3, the second bushing 3 is fixed in the air outlet channel 4, the outlet joint 1 is fixedly connected to the second bushing 3, and a third sealing ring 2 is provided at the contact position between the outlet joint 1 and the air outlet channel 4 to ensure sealing.

[0036] Transmission mechanism E as attached Figures 4-5As shown, it includes a mounting cover 8, a rotating shaft 9 and a movement 11 for driving the rotating shaft 9 to deflect, the mounting cover 8 divides the cavity in the valve body A into two parts, an upper part and an lower part, and a fourth sealing ring 5 is provided between the mounting cover 8 and the inner wall of the valve body A to ensure the airtightness of the connection; three columns are fixedly connected to the top of the mounting cover 8, and the movement 11 is fixedly connected to the mounting cover 8 through the columns, and a downwardly protruding mounting block is provided at the bottom of the mounting cover 8, and a horizontal through hole is provided on the mounting block, and a first bushing is provided in the through hole, and a push shaft 6 is horizontally slidably connected in the first bushing, and two coaxial shoulders are provided on the push shaft 6, and the two shoulders are located on the same side of the mounting block, and the shoulder away from the mounting block is used to seal the air outlet end of the valve body A; a vertical connecting hole is provided on the mounting cover 8, and the rotating shaft 9 is rotatably connected in the connecting hole, and the rotating shaft 9 is Two annular mounting grooves are provided on the top, and a second sealing ring is sleeved in the mounting groove; in order 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 a connecting shaft, the connecting shaft is coaxial with the connecting hole, and the rotating shaft 9 passes through the connecting shaft and is rotatably connected thereto; the top of the rotating shaft 9 is fixedly connected to the relevant valve upper cover 10, and the bottom of the rotating shaft 9 is fixedly connected to the relevant valve lower cover 18, and the valve closing upper cover 10 and the valve closing lower cover 18 are both plastic parts; more specifically, both ends of the rotating shaft 9 are D-axes, and the valve closing upper cover 10 and the valve closing lower cover 18 are both provided with D holes that cooperate with the D-axes, and then the rotating shaft 9 is fixedly connected with the valve closing upper cover 10 and the valve closing lower cover 18 by a locking screw, the locking screw is coaxial with the rotating shaft 9, and a first gasket is provided at the connection between the locking screw and the valve closing upper cover 10 and the valve closing lower cover 18.

[0037] In addition, the valve closing lower cover 18 includes a columnar connecting portion, a clamping portion and a first baffle integrally formed on the connecting portion, the connecting portion is provided with a D hole and fixedly connected to the bottom of the rotating shaft 9; the clamping portion is "U"-shaped and the open end is away from the connecting portion, the open end of the clamping portion is a U-shaped groove, the push shaft 6 is clamped in the U-shaped groove, the two shoulders are respectively located on both sides of the U-shaped groove, the push shaft 6 is sleeved with a first adjusting spring 7, one end of the first adjusting spring 7 is fixedly connected to the mounting block, and the other end is abutted against the shoulder adjacent to it; the first baffle is "L"-shaped, one end of the first baffle connected to the connecting portion is perpendicular to the clamping portion, the other end of the first baffle is parallel to the clamping portion, the end of the first baffle away from the connecting portion extends to the end of the push shaft 6 away from the connecting portion, and the end of the push shaft 6 away from the connecting plate abuts against the first baffle.

[0038] The cavity of the valve body A is also provided with an indicator dial B, as shown in the attached Figures 6 to 8As shown, it comprises a transparent cover 15 and a base 12 with a center hole, the upper surface of the base 12 is provided with a circular blind hole, and an opaque prompt plate 14 is fixedly connected to the upper surface of the base 12. Specifically, the prompt plate 14 is glued to the base 12, and an avoidance hole is provided on the prompt plate 14. A pointer B2, a warning word B3 and an operation method B1 are printed around the avoidance hole on the upper surface of the prompt plate 14, and a first notch extending to the avoidance hole is provided on the outer wall of the prompt plate 14; a protective cover 16 is sleeved on the transparent cover 15, and the center of the transparent cover 15 is provided with a protective cover 16. A fixing rod extending downward is provided at the center, and the fixing rod is rotatably connected to the center hole through the avoidance hole; a transparent dial 13 is fixedly connected to the fixing rod, and the dial 13 is located in the blind hole and below the prompt plate 14, and the dial 13 is mm away from the bottom of the blind hole. A time scale B4 is provided on the dial 13, and an arc-shaped avoidance opening coaxial with the fixing rod is provided on the dial 13. A notch is provided on the dial 13, and the notch extends from one end of the avoidance opening to the outer edge of the dial 13, and the free end of the notch of the dial 13 is located at the first notch.

[0039] The movement 11 includes a coil spring, and the movement 11 also includes a movement shaft for driving a 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 threadedly connected in the second threaded hole. A through hole for the movement shaft to pass through is provided in the axial direction of the fixed rod, and a guide hole coaxial with the through hole is provided at the top of the transparent cover 15, and the two are connected. A circular placement groove is provided at the top of the transparent cover 15, and the placement groove is coaxial with the guide hole, and the diameter of the placement groove is larger than the aperture of the guide hole. A second washer is provided in the placement groove, and 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 placement groove, and the second washer and the fastening screw are located in the cap 17 to improve the aesthetics.

[0040] A flow component D is provided in the air intake passage. Figures 9 to 12 As shown, it includes a flow base D12, a transition assembly and two valve cores, and the flow base D12 is fixedly connected with a filter seat D13, a flow valve core seat and a regulating valve core seat D5 in sequence. Specifically, an annular boss is integrally formed in the flow base D12, and the flow valve core seat and the regulating valve core seat D5 are respectively fixed on both sides of the boss, and the first sealing ring D6 and the fifth sealing ring D10 are respectively provided at the connection between the regulating valve core seat D5 and the flow valve core seat and the boss, and a constriction is provided at the outer edge of the flow valve core seat away from the filter seat D13, and the fifth sealing ring D10 is sleeved on the constriction.

[0041] Both the flow valve core seat and the regulating valve core seat D5 are provided with a flow hole D54 for gas to pass through, and a flow sealing ring D7 is pressed into the flow hole D54. More specifically, a fixing ring is provided on the side wall of the flow hole D54, and the flow sealing ring D7 is provided with an annular protrusion used in conjunction with the fixing ring, so that the fixing ring supports the flow sealing ring D7. The ends of the flow valve core seat and the regulating valve core seat D5 away from the filter seat D13 are both provided with guide tubes D55. Specifically, rods are fixedly connected to the outer wall of the guide tube D55 in a radial manner, and the other end of the rod is fixedly connected to the side wall of the flow hole D54. One end of the guide tube D55 extends into the flow sealing ring D7. The outer diameter of the guide tube D55 is smaller than the aperture of the flow sealing ring D7, and the guide tube D55 is coaxial with the flow hole D54. More specifically, the regulating valve core seat D5 includes an annular regulating fixed seat D51 and an regulating cylinder D52 fixedly connected to the regulating fixed seat D51 through a rod. The regulating cylinder D52 and the regulating fixed seat D51 are coaxial. The flow hole D54 is arranged at the center of the regulating cylinder D52 and penetrates it. Air inlet holes D53 are evenly distributed between the regulating cylinder D52 and the regulating fixed seat D51, and the flow sealing ring D7 is fixedly connected in the regulating cylinder D52.

[0042] The two valve cores each include a guide rod D8 and a sealing plate for sealing an overflow sealing ring D7. The guide rod D8 is fixedly connected at the center of the sealing plate. The two guide rods D8 are respectively sleeved with a second adjusting spring D9 and an overflow spring D11. The two guide rods D8 respectively pass through the two overflow sealing rings D7 and are slidably connected in the corresponding guide tubes D55. One end of the overflow spring D11 and the second adjusting spring D9 are respectively abutted against the two sealing plates. One end of the overflow spring D11 and the second adjusting spring D9 away from the sealing plate are respectively sleeved on the corresponding guide tubes D55. The other end of the sealing plate abutting against the overflow spring D11 abuts against the filter seat D13. The other end of the sealing plate abutting against the second adjusting spring D9 abuts against the guide tube D55 (the guide tube D55 is connected to the overflow valve core seat). The two sealing plates are at an equal distance from the corresponding guide tubes D55. In the initial state, one end of the guide rod D8 located in the overflow valve core seat away from the filter seat D13 abuts against the sealing plate not connected thereto.

[0043] The transition assembly includes a transition sealing ring D4 and a transition base D1 with an opening at one end, the open end of the transition base D1 is fixedly connected to the end of the flow base D12 away from the filter seat D13, and the open end of the transition base D1 is abutted against the end of the adjustment fixing seat D51 away from the filter seat D13; the end of the transition base D1 away from the opening is evenly distributed with air outlet holes connected to the opening, the inner bottom of the transition base D1 is provided with a limiting tube extending toward the open end, and the guide tube D55 close to it is slidably connected in the limiting tube, and a transition baffle D3 is slidably connected in the transition base D1, specifically: the transition baffle D3 includes a sleeve D31 and an annular retaining ring D32, the retaining ring D32 is slidably connected in the transition base D1, and connecting rods are evenly distributed on the outer wall of the sleeve D31, and the end of the connecting rod away from the sleeve D31 is fixedly connected to the inner wall of the retaining ring D32, and the gap between the connecting rod, the sleeve D31 and the inner wall of the retaining ring D32 constitutes a through hole, and the through hole The sleeve D31 is slidably sleeved on the guide tube D55 of the regulating valve core seat D5; a transition spring D2 is sleeved on the sleeve D31, one end of the transition spring D2 is sleeved on the limit tube and abuts against the inner bottom of the transition base D1, and the other end of the transition spring D2 abuts against the retaining ring D32; the transition sealing ring D4 is sleeved on the regulating cylinder D52, and the transition sealing ring D4 is evenly distributed with air holes D41, and the transition sealing ring D4 faces the retaining ring D32. An annular groove is provided on one side of the ring D32, and the air hole D41 is arranged in the groove. The air hole D41 is connected with the air inlet hole D53. The side of the retaining ring D32 facing the transition sealing ring D4 is protruded with an annular flange D33 used in conjunction with the groove; the aperture of the flow hole D54 is larger than the outer diameter of the sleeve D31, and the sleeve D31 is coaxial with the adjusting tube D52; the elastic force of the flow spring D11>the elastic force of the transition spring D2≥the elastic force of the second adjusting spring D9.

[0044] The specific implementation process is as follows:

[0045] Install the outlet connection assembly C: fix the second bushing 3 in the outlet channel 4, then fix the outlet joint 1 in the second bushing 3, and ensure that the contact portion between the outlet joint 1 and the outlet channel 4 is provided with a third sealing ring 2 to ensure sealing.

[0046] 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 the tightness of the connection. Then fix the movement 11 to the top of the mounting cover 8 through the column. Set the first bushing in the through hole of the bottom mounting block of the mounting cover 8, and then connect the push shaft 6 horizontally in the first bushing, and ensure that the two shoulders on the push shaft 6 are on the same side of the mounting block. Rotate the rotating shaft 9 to connect it to the vertical connecting hole on the mounting cover 8, and improve the stability of the rotation of the rotating shaft 9 through the connecting shaft. Sleeve the second sealing ring in the mounting groove on the rotating shaft 9. Match the valve closing upper cover 10 and the valve closing lower cover 18 through the D axis and the D hole, and use the locking screws to fix them at both ends of the rotating shaft 9, and set the first gasket at the connection between the locking screw and the valve closing upper cover 10 and the valve closing lower cover 18. The push shaft 6 is clamped in the U-shaped groove of the valve closing lower cover 18, and the first adjusting spring 7 is put on. One end of the first adjusting spring 7 is fixed on the side of the mounting block facing the shaft shoulder, and the other end is abutted against the shaft shoulder adjacent to it; in the initial state, the shaft shoulder away from the mounting block faces the outlet joint 1 and seals it.

[0047] Install the indicator dial B: glue the opaque reminder disk 14 to the upper surface of the base 12, and ensure that the avoidance hole, the first notch, and the engraved pointer B2, the warning word B3 and the operation method B1 on the reminder disk 14 are accurately positioned. Fix the transparent dial 13 to the fixing rod of the transparent cover 15, and make the dial 13 located in the blind hole on the upper surface of the base 12 and below the reminder disk 14, and keep the dial 13 at a specific distance from the bottom of the blind hole. Put the transparent cover 15 on the protective cover 16, and fix the fixing rod to the movement shaft through the second threaded hole, the fastening screw, the second washer and the guide hole at the top of the movement shaft, and finally install the cover 8 in the placement groove to improve the aesthetics.

[0048] Install the flow component D: Install the flow component D in the air inlet passage of the valve body A.

[0049] In the initial state, the flange D33 of the transition baffle D3 blocks the air hole D41 on the transition sealing ring D4, so that after the gas flows into the filter seat D13, it can only pass through the flow seal D7 in the flow valve core seat and the regulating valve core seat D5, and then pass through the through hole on the transition baffle D3, and finally enter the cavity of the valve body A from the air outlet on the transition base D1. The two sealing plates are in the initial position under the action of the flow spring D11 and the second regulating spring D9, respectively. The end of the guide rod D8 in the flow valve core seat away from the filter seat D13 is against the sealing plate between the flow valve core seat and the regulating valve core seat D5. The scale plate 13 of the indicator dial B is hidden under the prompt plate 14, and the warning words B3 and the operation method B1 on the prompt plate 14 are clearly visible. The push shaft 6 is in the initial position under the action of the first regulating spring 7, and the shaft shoulder on the push shaft 6 away from the mounting block seals the outlet end of the valve body A to achieve valve closing.

[0050] When in use, by rotating the transparent cover 15 clockwise, the transparent cover 15 drives the dial 13 to rotate, and the dial 13 starts to rotate out and then partially blocks the prompt disk 14. When the dial 13 rotates out, the time scale B4 on the dial 13 is displayed, and the time scale B4 corresponding to the pointer B2 is the current timing time. When the transparent cover 15 is released, the coil spring on the movement 11 begins to release its elastic force, and the movement 11, under the action of a specific mechanism, begins to drive the dial 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). During the entire countdown process, the larger time scale B4 is gradually covered by the opaque prompt disk 14, and the scale display becomes less and less, truly interpreting the concept of countdown. The pointer B2 is specially treated to be eye-catching and fixed, and the user can accurately read the corresponding remaining time. In addition, the dial 13 is set to be transparent. Even if the time scale B4 of the dial 13 is rotated to the top of the indicator disk, the warning word B3 and the operation method B1 on the prompt disk 14 can still be seen, thereby reminding the user again and further improving the safety of use.

[0051] When the coil spring on the movement 11 releases its elastic force, the closing plate of the movement 11 drives the closing valve upper cover 10 to deflect to a certain extent. Since the closing valve upper cover 10 and the closing valve lower cover 18 are respectively fixedly connected to the two ends of the rotating shaft 9, the rotating shaft 9 rotates and transmits the rotation to the closing valve lower cover 18. With the cooperation of the first adjusting spring 7 and the shaft shoulder, the push shaft 6 will be driven to move toward the air inlet end of the valve body A, so that the shaft shoulder on the push shaft 6 away from the mounting block is separated from the contact with the air outlet end of the valve body A, thereby realizing the valve opening. At this time, the gas flows in from the air inlet channel of the valve body A and enters the cavity of the valve body A through the flow component D.

[0052] When the flow rate increases, the pressure generated by the airflow gradually increases to the elastic force of the second adjusting spring D9, and the guide rod D8 in the adjusting valve core seat D5 and the sealing plate connected thereto move toward the side of the transition base D1 until they are tightly fitted with the sealing plate and the flow sealing ring D7 in the adjusting valve core seat D5, cutting off the airflow from there into the cavity of the valve body A. If the flow rate no longer increases at this time, the flow component D is in a closed valve state.

[0053] Because the elastic force of the transition spring D2 is close to the elastic force of the second adjusting spring D9, if the flow rate continues to increase at this time (normal flow rate increase), the air flow enters through the air inlet hole D53, and then acts on the transition baffle D3 through the air hole D41 on the transition sealing ring D4. The pressure generated by the air flow can open the transition baffle D3, so that the transition baffle D3 moves to the side of the valve body A cavity, and then the air flow enters the interior of the valve body A cavity from the through hole of the transition baffle D3, and the gas timing valve is in a normal working state.

[0054] If the flow rate continues to increase, even greater than the elastic force of the overcurrent spring D11 (the elastic force of the overcurrent spring D11 is at the maximum overcurrent value allowed by the standard. When it is greater than the elastic force of the overcurrent spring D11, it can be determined as an overcurrent caused by a fault), the guide rod D8 and the sealing plate connected to the overcurrent spring D11 are pressed toward the overcurrent sealing ring D7 until they fit tightly, and the overcurrent component D completely blocks the gas from entering the valve body A, thereby achieving overcurrent protection.

[0055] The above is only an embodiment of the present invention, and the common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the structure of the present invention, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A flow adaptive gas timing valve, comprising a valve body, a cavity is provided in the valve body, an air inlet channel and an air outlet channel connected to the cavity are provided on opposite sides of the valve body, a transmission mechanism for opening or closing the air outlet channel of the valve body is provided in the cavity; a flow component is provided in the air inlet channel, characterized in that: The overflow assembly includes an overflow base, a transition assembly and two valve cores, wherein the overflow base is fixedly connected with a filter seat, an overflow valve core seat and an adjusting valve core seat in sequence, the overflow valve core seat and the adjusting valve core seat are both provided with overflow holes for gas to pass through, and overflow sealing rings are both provided in the overflow holes, and the two valve cores each include a guide rod and a sealing plate for sealing the overflow sealing ring, the guide rod is fixedly connected to the gas outlet at the center of the sealing plate, the two guide rods are respectively sleeved with a second adjusting spring and an overflow spring, the two guide rods respectively pass through the two overflow sealing rings, one end of the overflow spring and the second adjusting spring are respectively abutted against the two sealing plates, the other ends of the overflow spring and the second adjusting spring are respectively abutted against the overflow valve core seat and the adjusting valve core seat, the other end of the sealing plate abutted against the overflow spring abuts against the filter seat, and the other end of the sealing plate abutted against the second adjusting spring abuts against the overflow valve core seat; the transition assembly includes a transition sealing The closure of the present invention is a kind of closure structure, and the closure of the present invention is a kind of closure structure, and the closure of the present invention is a kind of closure structure, and the closure of the present invention is a kind of closure structure.

2. A flow adaptive gas timing valve according to claim 1, characterized in that: An annular boss is integrally formed in the flow base, and the flow valve core seat and the regulating valve core seat are respectively fixed on both sides of the boss; a first sealing ring and a fifth sealing ring are respectively provided at the connection between the regulating valve core seat and the flow valve core seat and the boss; a constriction is provided at the outer edge of the flow valve core seat away from one end of the filter seat, and the fifth sealing ring is sleeved on the constriction.

3. A flow adaptive gas timing valve according to claim 2, characterized in that: The ends of the overflow valve core seat and the regulating valve core seat away from the filter seat are both provided with guide tubes, the two guide rods are respectively slidably connected in the two guide tubes, the two guide tubes are respectively extended into the two overflow sealing rings, the ends of the overflow spring and the second regulating spring away from the sealing plate are respectively sleeved on the corresponding guide tubes; the two sealing plates are at an equal distance from the corresponding guide tubes, and in the initial state, the end of the guide rod in the overflow valve core seat away from the filter seat is abutted against the sealing plate between the overflow valve core seat and the regulating valve core seat; the transition sealing ring is provided with an annular groove on the side facing the transition baffle, the air hole is arranged at the groove, and the transition baffle is provided with an annular flange used in conjunction with the groove.

4. A flow adaptive gas timing valve according to claim 3, characterized in that: The transition baffle includes a sleeve and an annular retaining ring, which is slidably connected to the transition base. Connecting rods are evenly distributed on the outer wall of the sleeve. The end of the connecting rod away from the sleeve is fixedly connected to the inner wall of the retaining ring. The gap between the connecting rod, the sleeve and the inner wall of the retaining ring constitutes the through hole; the sleeve is slidably sleeved on the guide tube of the regulating valve core seat.

5. A flow adaptive gas timing valve according to claim 4, characterized in that: The regulating valve core seat includes an annular regulating fixed seat and an regulating cylinder fixedly connected in the regulating fixed seat, the regulating cylinder and the regulating fixed seat are coaxial, the flow hole is arranged at the center of the regulating cylinder and passes through it, the air inlet holes are evenly distributed between the regulating cylinder and the regulating fixed seat, the flow sealing ring is fixedly connected in the regulating cylinder, the aperture of the flow hole is larger than the outer diameter of the sleeve, and the sleeve is coaxial with the regulating cylinder; one end of the guide tube is fixedly connected in the regulating cylinder, the transition sealing ring is sleeved on the regulating cylinder, and the flange is arranged on the side of the retaining ring facing the transition sealing ring.

6. A flow adaptive gas timing valve according to any one of claims 1 to 5, characterized in that: The transmission mechanism includes a mounting cover and a rotating shaft. A mounting block protruding downward is provided at the bottom of the mounting cover. The mounting block is provided with a horizontal through hole. A push shaft is horizontally slidably connected in the through hole. The push shaft is provided with two shoulders coaxial with the shaft, and the two shoulders are located on the same side of the mounting block; a vertical connecting hole is provided on the mounting cover, and the rotating shaft is rotatably connected in the connecting hole. The top of the rotating shaft is fixedly connected to the relevant valve upper cover, and a movement for driving the valve closing upper cover to deflect is installed on the top of the mounting cover. The bottom of the rotating shaft is fixedly connected to the relevant valve lower cover, and the valve closing lower cover is provided with a U-shaped groove, and the push shaft is clamped in the U-shaped groove, and the two shoulders are respectively located on both sides of the U-shaped groove. A first adjusting spring is sleeved on the push shaft, and one end of the first adjusting spring is fixedly connected to the mounting block, and the other end is abutted against the shoulder adjacent to it.

7. The flow adaptive gas timing valve according to claim 6, characterized in that: An "L"-shaped first baffle is integrally formed on the valve closing lower cover, and one end of the first baffle away from the valve closing lower cover extends to the end of the push shaft away from the valve closing lower cover, and the end of the push shaft away from the valve closing lower cover abuts against the first baffle.

8. The flow adaptive gas timing valve according to claim 7, characterized in that: An indicating dial is also provided in the cavity of the valve body, and the indicating dial comprises a transparent cover and a base provided with a center hole, a blind hole is provided on the upper surface of the base, an opaque prompting plate is fixedly connected to the upper surface of the base, an avoidance hole is provided on the prompting plate, a pointer, a warning word and an operating method are printed around the avoidance hole on the upper surface of the prompting plate, and a first notch extending to the avoidance hole is provided on the outer wall of the prompting plate; a fixing rod extending downward is provided at the center of the transparent cover, and the fixing rod is rotatably connected to the center hole through the avoidance hole; a transparent dial is fixedly connected to the fixing rod The dial is located in the blind hole and below the prompt plate, the dial is 1.5 to 2.5 mm away from the bottom of the blind hole, the dial is provided with a time scale, the dial is provided with a superior arc-shaped avoidance opening coaxial with the fixed rod, the dial is provided with a cutout, the cutout extends from one end of the avoidance opening to the outer edge of the dial, and the free end of the dial cutout is located at the first notch; a protective cover is provided on 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.

9. The flow adaptive gas timing valve according to claim 8, characterized in that: A second threaded hole is provided at the center of the top of the movement shaft, and a fastening screw is threadedly connected to the second threaded hole. A through hole for the movement shaft to pass through is provided in the axial direction of the fixing rod, and a guide hole coaxial with the through hole is provided on the top of the transparent cover and the two are connected, and the fastening screw passes through the guide hole and is threadedly connected to the second threaded hole.

10. The flow adaptive gas timing valve according to claim 9, characterized in that: A circular placement groove is provided on the top of the transparent cover. The placement groove is coaxial with the guide hole. The diameter of the placement groove is larger than the aperture of the guide hole. A second washer is provided in the placement groove. The fastening screw passes through the second washer and the guide hole and is fixedly connected to the second threaded hole. A cover cap is provided in the placement groove. The second washer and the fastening screw are located in the cover cap.

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