Flow-adjustable gas timing valve

Abstract

The invention discloses a flow-adjustable gas timing valve in the technical field of safety valves, which comprises a valve body provided with a cavity, and two sides of the valve body are respectively provided with a gas inlet channel and a gas outlet channel. A transmission mechanism is arranged in the cavity to control opening and closing of the air outlet channel. An overflowing assembly is arranged in the air inlet channel and sequentially comprises a first sealing ring, a reset spring, a valve element (comprising a connecting rod and a blocking disc), a sliding seat (provided with an air inlet hole), an overflowing spring and an end cover. The first sealing ring is fixed at the tail end of the air inlet channel; the reset spring is arranged between the first sealing ring and the sliding seat; the baffle disc is positioned in the reset spring but is not in contact with the reset spring; the sliding seat allows gas to pass through; the connecting rod penetrates through the sliding seat and is in sliding fit with the sliding seat; the overflowing spring sleeves the connecting rod, and two ends of the overflowing spring abut against the sliding seat and the end cover respectively; the end cover is in threaded connection with the tail of the connecting rod. In addition, the valve body is provided with an adjusting piece to adjust the position of the sliding seat relative to the first sealing ring, so that the flow threshold value is changed, and safety performance is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of safety valves, and in particular relates to a flow-adjustable 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 over-current devices as accessories. When the flow increases to the maximum value of the over-current design, or the outlet pipe falls off and causes under-pressure, the over-current device will automatically close the valve to ensure that there is no safety hazard caused by over-current or under-pressure.

[0003] However, the working conditions in different industries and regions vary significantly, which means that the required safety valve flow thresholds will also be different. Existing safety valve products often use fixed flow setting values. When used in different industries and regions, the normal use of the product is often affected by different flow values, which limits the product's use area and application scenarios. If the safety valve product continues to be used, due to the large difference in the flow value of the delivery, the change in the flow value (which is a normal value) will often cause the safety valve to automatically close, affecting the user's work or life. In order to solve such problems, after-sales personnel usually need to remove the pipeline and replace parts or safety valves. There is a risk of damaging the air tightness of the pipeline during the disassembly and reinstallation process, which may cause the leakage of toxic gases or fuel gas; in addition, since the replacement of parts or the installation of safety valves are handled on site by professionals, the cost is greatly increased. Summary of the invention

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

[0005] A flow-adjustable gas timing valve in the present solution 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-through component is arranged in the air inlet channel, and the flow-through component comprises a first sealing ring, a return spring, a valve core, a sliding seat, a flow-through spring and an end cover which are arranged in sequence in the air inlet channel, the first sealing ring is fixed to the air outlet end of the air inlet channel, the return spring is located between the first sealing ring and the sliding seat, and the two ends of the return spring are respectively abutted against the valve body. and the wall of the sliding seat, the valve core includes a connecting rod and a circular baffle fixedly connected to the connecting rod, the diameter of the baffle is larger than the outer diameter of the first sealing ring, the sliding seat is evenly distributed with air inlet holes for gas to pass through, one end of the connecting rod passes through the sliding seat and is slidably connected to the sliding seat, the baffle is located in the reset spring and there is a gap between the two; the end cover is threadedly connected to the end of the connecting rod away from the reset spring, the overflow spring is sleeved on the connecting rod, and the two ends of the overflow spring are respectively abutted against the sliding seat and the end cover; the valve body is provided with an adjusting member for controlling the sliding seat to approach or move away from the first sealing ring.

[0006] The working principle and beneficial effects of this solution are as follows: when the threshold of the flow device needs to be reduced, the sliding seat is controlled by the adjusting member to move toward the first sealing ring, and the sliding seat drives the valve core, the flow spring and the end cover to move toward the first sealing ring, so that the distance between the end face of the baffle and the first sealing ring is reduced. At this time, if the flow rate at the inlet end increases, the valve core is pressed in, because the distance between the end face of the baffle and the first sealing ring is reduced, and under the condition that the elastic modulus of the spring remains unchanged, the flow spring only needs a smaller flow rate to achieve the fit between the baffle and the first sealing ring and close the valve. On the contrary, the sliding seat is controlled by the adjusting member to move away from the first sealing ring, so that the sliding seat, the valve core and the flow spring move away from the first sealing ring, and the distance between the end face of the baffle and the first sealing ring increases. At this time, if the flow rate at the inlet end increases, the valve core is pressed in, because the distance between the end face of the baffle and the first sealing ring increases, and under the condition that the elastic modulus of the spring remains unchanged, the flow spring only needs a larger flow rate to achieve the fit between the baffle and the first sealing ring and close the valve. Therefore, by controlling the sliding seat to approach or move away from the first sealing ring through the adjusting member, the size of the overcurrent threshold can be adjusted.

[0007] The gas enters the cavity of the valve body through the air inlet channel and the flow component, and opens or closes the air outlet channel of the valve body through the transmission mechanism. When the air outlet channel is opened, the gas timing valve is opened and gas is supplied normally; when the air outlet channel is closed by the transmission mechanism, the gas timing valve is closed.

[0008] Furthermore, the regulating member is a flow regulating shaft, which is threadedly connected to the valve body, one end of which extends into the air inlet channel, and the end of which is located in the air inlet channel is hemispherical, truncated or conical, and the end of the sliding seat away from the first sealing ring is provided with a chamfer, and the end of the flow regulating shaft located in the air inlet channel abuts against the chamfer of the sliding seat; the end of the flow regulating shaft away from the air inlet channel is provided with an adjusting groove. Through the setting of the flow regulating shaft, the sliding seat can be driven to move to the side away from / close to the first sealing ring during the upward / downward movement, thereby adjusting the flow threshold of the flow device and realizing rapid adjustment of the flow threshold; and the setting of the adjusting groove facilitates the rotation of the flow regulating shaft.

[0009] Furthermore, the outer surface of the valve body is provided with a groove, and a sealing gasket and a limiting cap are arranged in the groove from bottom to top, the top of the sealing gasket abuts against the bottom of the limiting cap, and one end of the flow regulating shaft provided with an adjustment groove is located in the limiting cap, and the top of the limiting cap is provided with an adjustment hole, and the adjustment hole is located directly above the flow regulating shaft, and the flow regulating shaft extends into the adjustment hole; a first threaded hole is provided at the bottom of the groove, and the first threaded hole passes through the valve body and is connected to the air inlet channel, and the aperture of the first threaded hole is smaller than the aperture of the groove, and the flow regulating shaft is threadedly connected in the first threaded hole. Through the setting of the limiting cap and the adjustment hole, the flow regulating shaft can be rotated through the adjustment hole, and the flow regulating shaft can be prevented from extending out of the limiting cap, so as to avoid the flow regulating shaft from detaching from the valve body and causing gas leakage.

[0010] Furthermore, the flow regulating shaft is larger at the top and smaller at the bottom, and an annular annular groove is provided in the middle of the outer wall of the larger end of the flow regulating shaft, and a sealing gasket is sleeved at the annular groove. The smaller end of the flow regulating shaft is threadedly connected in the first threaded hole, and the smaller end of the flow regulating shaft extends into the air inlet channel and abuts against the chamfer of the sliding seat. The end of the flow regulating shaft away from the sliding seat is integrally formed with a circular adjustment block, and the diameter of the adjustment block is smaller than the diameter of the larger end of the flow regulating shaft, and the adjustment groove is provided on the adjustment block. By providing an annular groove on the outer wall of the larger end of the flow regulating shaft and sleeved with a sealing gasket, it is possible to effectively prevent gas from leaking from the connection between the flow regulating shaft and the valve body, thereby improving the safety and reliability of the gas timing valve. In addition, the design of the flow regulating shaft being larger at the top and smaller at the bottom and the structure abutting against the chamfer of the sliding seat enable the moving distance of the sliding seat to be accurately controlled when the flow regulating shaft is rotated, thereby realizing accurate adjustment of the flow threshold of the flow-through device. Different requirements for gas flow in different usage scenarios are met, and the applicability of the gas timing valve is improved. The adjustment slot on the adjustment block is convenient for users to use tools (such as screwdrivers, etc.) to rotate the adjustment block, making flow adjustment more convenient. At the same time, the diameter of the circular adjustment block is smaller than the diameter of the larger end of the flow adjustment shaft, which is convenient for operation without affecting the compactness of the overall structure.

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

[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 a U-shaped groove is provided on the valve closing lower cover. 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. An adjusting spring is sleeved on the push shaft, and one end of the 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 movement's door-closing piece to drive the valve-closing upper cover to deflect to a certain extent. Since the valve-closing upper cover and the valve-closing lower cover are fixedly connected to the two ends of the rotating shaft, the rotating shaft rotates and transmits to the valve-closing lower cover at the same time. Under the cooperation of the adjusting spring and the shaft shoulder, the push shaft will be driven to move toward the air inlet end of the valve body, so that the shaft shoulder on the push shaft away from the mounting block is separated from the contact with the valve body's air outlet end, thereby opening the valve. After reaching the preset time, the movement stops working, the movement's door-closing piece is separated from the valve-closing upper cover, and the push shaft returns to the initial position under the action of the adjusting spring, and then drives the push shaft to move toward the valve body's air outlet end. After the shaft shoulder on the push shaft away from the mounting block seals the valve body's air outlet end, the valve is closed. Through the U-shaped groove clamping cooperation between the push shaft and the valve-closing lower cover, and the limiting function of the shaft shoulder, the accuracy and stability of power transmission are ensured, avoiding the problems of power failure or inaccurate output, connector detachment, loosening, etc., thereby improving the overall reliability of the safety valve.

[0013] Furthermore, an "L"-shaped baffle is integrally formed on the valve closing lower cover, and the end of the 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 baffle. When the movement drives the rotating shaft to rotate, and then drives the valve closing lower cover to deflect, the baffle can quickly push the push shaft to move to one side of the rotating shaft, thereby improving its responsiveness. In addition, the adjustment spring cooperates with the baffle, so that the push shaft is always under the joint action of the shaft shoulder and the 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, a blind hole is provided on the upper surface of the base, 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 notch extending to the avoidance hole is provided on the outer wall of the prompt disk; a downwardly extending fixing rod 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 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 1 A three-dimensional diagram of a flow-adjustable 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 An exploded view of the intermediate flow component after partial connection with the inlet passage end of the valve body;

[0030] Fig.10 for Figure 1 A longitudinal cross-sectional view of the intermediate flow component after partial connection with the inlet passage end of the valve body. DETAILED DESCRIPTION

[0031] The following is further described in detail through specific implementation methods:

[0032] The figure marks 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 component C, flow component D, transmission mechanism E, outlet joint 1, third sealing ring 2, second bushing 3, air outlet channel 4, fourth sealing ring 5, push shaft 6, 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, cover cap 17, valve closing lower cover 18, sealing gasket 19, flow adjusting shaft 20, first sealing ring 21, reset spring 22, valve core 23, sliding seat 24, flow spring 25, end cover 26, limit cap 27.

[0033] The embodiment is basically as shown in the attached Figures 1 to 3As shown: a flow-adjustable gas timing valve comprises 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 for opening or closing the air outlet channel 4 of the valve body A is provided in the cavity; an outlet connection assembly C is provided in the air outlet channel 4, the outlet connection assembly C comprises 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 in the second bushing 3, and a third sealing ring 2 is provided at the contact portion between the outlet joint 1 and the air outlet channel 4 to ensure sealing.

[0034] Transmission mechanism E as attached Figures 4-5 As 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.

[0035] In addition, the valve closing lower cover 18 includes a columnar connecting portion and a clamping portion and a baffle integrally formed on the connecting portion, the connecting portion is provided with a D hole and is 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, an adjusting spring 7 is sleeved on the push shaft 6, one end of the adjusting spring 7 is fixedly connected to the mounting block, and the other end abuts against the shoulder adjacent to it; the baffle is "L"-shaped, one end of the baffle connected to the connecting portion is perpendicular to the clamping portion, the other end of the baffle is parallel to the clamping portion, the end of the 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 baffle.

[0036] The cavity of the valve body A is also provided with an indicator dial B, as shown in the attached Figures 6 to 8 As 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 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 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 notch.

[0037] 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.

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

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

[0040] The sliding seat 24 is cylindrical, and the sliding seat 24 is located in the valve body A and the two are clearance-matched, with a clearance value of 0 to 0.04 mm; one end of the sliding seat 24 is open, and the outer wall of the open end of the sliding seat 24 is chamfered; the other end of the sliding seat 24 is evenly distributed with air inlet holes for gas passage, and a fixing column is provided at the center of the sliding seat 24, the fixing column is coaxial with the sliding seat 24, and a guide hole is provided at the center of the fixing column; the open end of the sliding seat 24 faces the expansion hole.

[0041] The valve core 23 includes a connecting rod, an end cover 26 and a circular baffle, the baffle is fixedly connected to the middle part of the connecting rod, the end cover 26 is threadedly connected to one end of the connecting rod, and the diameter of the baffle is larger than the outer diameter of the first sealing ring 21; the end of the connecting rod away from the end cover 26 extends through and extends into the reset spring 22, the baffle is located in the reset spring 22 and there is a gap between the two, that is, the baffle does not contact the reset spring 22; the end of the connecting rod connected to the end cover 26 passes through the guide hole of the fixed column and is slidably connected to it, and the sliding seat 24 is located between the end cover 26 and the baffle; the over-current spring 25 is sleeved on the connecting rod, and the two ends of the over-current spring 25 are respectively abutted on the sliding seat 24 and the end cover 26; in the initial state, the distance between the baffle and the first sealing ring 21 is 5 mm.

[0042] The regulating assembly includes a flow regulating shaft 20, a limiting cap 27 and a sealing gasket 19. A circular groove is provided on the top of the valve body A, and a first threaded hole is provided at the bottom of the groove. The first threaded hole penetrates the upper wall of the valve body A and is connected to the air inlet channel. The aperture of the first threaded hole is smaller than the aperture of the groove; the flow regulating shaft 20 is larger at the top and smaller at the bottom, and an annular annular groove is provided in the middle of the outer wall of the larger end of the flow regulating shaft 20. The sealing gasket 19 is sleeved in the annular groove. The smaller end of the flow regulating shaft 20 is conical and threadedly connected to the first threaded hole. The smaller end of the flow regulating shaft 20 extends into the air inlet channel. The flow regulating shaft 20 is located in the air inlet channel One end of the flow regulating shaft 20 is against the chamfer of the sliding seat 24, and a circular regulating block is integrally formed at one end of the flow regulating shaft 20 away from the sliding seat 24. The diameter of the regulating block is smaller than the diameter of the larger end of the flow regulating shaft 20, and a straight-line regulating groove is provided on the regulating block; the opening end of the limiting cap 27 faces downward, and the opening of the opening end of the limiting cap 27 is circular and has a diameter equal to the outer diameter of the larger end of the flow regulating shaft 20. The regulating block is located inside the limiting cap 27, and the top of the limiting cap 27 is provided with an regulating hole connected to the opening and coaxial with the limiting cap 27. The aperture of the regulating hole is smaller than the outer diameter of the larger end of the flow regulating shaft 20, and the regulating hole is located directly above the flow regulating shaft 20. The length of the reset spring 223 is 15mm, and the elastic coefficient is 6.9g / mm; the length of the overcurrent spring 256 is 12mm, and the elastic coefficient is 0.2g / mm.

[0043] The specific implementation process is as follows:

[0044] 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.

[0045] Install the transmission mechanism E: Install the fourth sealing ring 5 between the mounting cover 8 and the inner wall of the valve body A to ensure 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 adjusting spring 7 is put on. One end of the adjusting spring 7 is fixed on the side of the mounting block facing the shaft shoulder, and the other end is abutted on 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.

[0046] 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, notch, and the engraved pointer B2, warning word B3, and 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. Sleeve the transparent cover 15 on the protective cover 16, and fix the fixing rod to the movement shaft through the second threaded hole, fastening screw, second washer and guide hole at the top of the movement shaft, and finally install the cover 8 in the placement groove to improve the aesthetics.

[0047] Install the flow component D: Install the first sealing ring 21 at the outlet end of the air inlet channel, and ensure that one side of the fixed ring on the outer wall of the first sealing ring 21 is tightly pressed against the inner wall of the outlet end of the air inlet channel of the valve body A. Install the reset spring 22 between the first sealing ring 21 and the sliding seat 24, so that the two ends of the reset spring 22 are respectively pressed against the wall of the valve body A and the sliding seat 24. Install the valve core 23, fix the baffle plate to the middle part of the connecting rod, and the end cover 26 is threadedly connected to one end of the connecting rod, so that the end of the connecting rod away from the end cover 26 passes through and extends into the reset spring 22, the baffle plate is located in the reset spring 22 and there is a gap between the two, and the end of the connecting rod connected to the end cover 26 passes through the guide hole of the fixed column at the center of the sliding seat 24 and is slidably connected to it, and the flow spring 25 is sleeved on the connecting rod, and the two ends are respectively pressed against the sliding seat 24 and the end cover 26. Install the adjustment assembly, sleeve the sealing gasket 19 on the annular groove on the outer wall of the larger end of the flow regulating shaft 20, thread the tapered part of the smaller end of the flow regulating shaft 20 into the first threaded hole at the bottom of the groove at the top of the valve body A, so that it extends into the air inlet channel and rests on the chamfer of the sliding seat 24, install the limit cap 27 on the top of the valve body A, so that the adjustment block is located in the limit cap 27, and the adjustment hole is located directly above the flow regulating shaft 20.

[0048] During use, when it is necessary to reduce the threshold of the flow device, use a tool (such as a screwdriver) to insert the adjustment slot on the adjustment block of the flow regulating shaft 20, and rotate the flow regulating shaft 20. During the rotation of the flow regulating shaft 20, the smaller conical part at its end pushes the sliding seat 24 to move toward the first sealing ring 21, and the sliding seat 24 drives the valve core 23, the flow spring 25 and the end cover 26 to move toward the first sealing ring 21, so that the distance between the end face of the baffle and the first sealing ring 21 is reduced. At this time, if the flow rate at the inlet end increases, the valve core 23 is pressed in, and since the distance between the end face of the baffle and the first sealing ring 21 is reduced, when the elastic modulus of the spring remains unchanged, the flow spring 25 only needs a smaller flow rate to achieve the fit between the baffle and the first sealing ring 21 and close the valve.

[0049] On the contrary, when the threshold of the flow device needs to be increased, the flow regulating shaft 20 is rotated in the opposite direction to control the sliding seat 24 to move away from the first sealing ring 21, so that the sliding seat 24, the valve core 23, and the flow spring 25 move away from the first sealing ring 21, and the distance between the end face of the baffle and the first sealing ring 21 increases. At this time, if the flow rate at the inlet end increases, the valve core 23 is pressed in, because the distance between the end face of the baffle and the first sealing ring 21 increases, and when the elastic modulus of the spring remains unchanged, the flow spring 25 needs a larger flow rate to achieve the fit between the baffle and the first sealing ring 21 and close the valve.

[0050] Timing function:

[0051] In the initial state, the scale plate 13 is hidden under the prompt plate 14, so that the warning words B3 and the operation method B1 on the prompt plate 14 are clearly visible, which can better remind the user to perform safe operation.

[0052] When the indicator dial B is working, the transparent cover 15 is rotated clockwise, and the transparent cover 15 drives the dial 13 to rotate. The dial 13 starts to rotate out and then partially covers the prompt plate 14. When the dial 13 is rotated out, the time scale B4 on the dial 13 is displayed, and the pointer B2 corresponds to the time scale B4, which is the current timing time.

[0053] 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).

[0054] During the countdown, the larger time scale B4 is gradually covered by the opaque reminder disk 14, and the scale display becomes less and less, truly interpreting the concept of countdown. The pointer B2 is specially eye-catching and fixed, so that users can accurately read the corresponding remaining time. At the same time, the dial 13 is set to be transparent. Even if the time scale B4 of the dial 13 is rotated out to the top of the indicator disk, the warning words B3 and operation method B1 on the reminder disk 14 can be seen, thereby reminding the user again and further improving the safety of use.

[0055] Valve switch control:

[0056] When in use, the coil spring on the movement 11 releases its elastic force, causing the closing plate of the movement 11 to drive the valve closing upper cover 10 to deflect to a certain extent. Since the valve closing upper cover 10 and the valve closing lower cover 18 are respectively fixedly connected to the two ends of the rotating shaft 9, the rotating shaft 9 rotates and transmits it to the valve closing lower cover 18 at the same time. With the cooperation of the adjusting spring 7 and the shoulder, the push shaft 6 will be driven to move toward the air inlet end of the valve body A, so that the shoulder on the push shaft 6 away from the mounting block is out of contact with the air outlet end of the valve body A, thereby realizing the valve opening.

[0057] After the preset time is reached, the movement 11 stops working, the door closing piece of the movement 11 separates from the valve closing cover 10, and the push shaft 6 returns to the initial position under the action of the adjusting spring 7, thereby driving the push shaft 6 to move toward the air outlet end of the valve body A. The shoulder of the push shaft 6 away from the mounting block seals the air outlet end of the valve body A to achieve valve closing.

[0058] 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-adjustable 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 a first sealing ring, a return spring, a valve core, a sliding seat, an overflow spring and an end cover which are sequentially arranged in the air inlet channel, the first sealing ring being fixed at the air outlet end of the air inlet channel, the return spring being located between the first sealing ring and the sliding seat, the two ends of the return spring being respectively abutted against the walls of the valve body and the sliding seat, the valve core including a connecting rod and a circular baffle plate fixedly connected to the connecting rod, the diameter of the baffle plate being larger than the outer diameter of the first sealing ring, the sliding seat being evenly provided with air inlet holes for gas to pass through, one end of the connecting rod passing through the sliding seat and being slidably connected thereto, the baffle plate being located in the return spring and having a gap therebetween; the end cover being threadedly connected to one end of the connecting rod away from the return spring, the overflow spring being sleeved on the connecting rod, the two ends of the overflow spring being respectively abutted against the sliding seat and the end cover; the valve body is provided with an adjusting member for controlling the sliding seat to approach or move away from the first sealing ring.

2. A flow-adjustable gas timing valve according to claim 1, characterized in that: The adjusting part is a flow adjusting shaft, which is threadedly connected to the valve body, one end of the flow adjusting shaft extends into the air inlet channel, the end of the flow adjusting shaft located in the air inlet channel is hemispherical, truncated cone or conical, the end of the sliding seat away from the first sealing ring is provided with a chamfer, the end of the flow adjusting shaft located in the air inlet channel is abutted against the chamfer of the sliding seat; the end of the flow adjusting shaft away from the air inlet channel is provided with an adjusting groove.

3. The flow-adjustable gas timing valve according to claim 2, characterized in that: The outer surface of the valve body is provided with a groove, and a sealing gasket and a limiting cap are arranged in the groove from bottom to top, the top of the sealing gasket is abutted against the bottom of the limiting cap, the flow regulating shaft is provided with an adjusting groove at one end which is located in the limiting cap, and the top of the limiting cap is provided with an adjusting hole, and the adjusting hole is located directly above the flow regulating shaft, and the flow regulating shaft extends into the adjusting hole; a first threaded hole is provided at the bottom of the groove, and the first threaded hole passes through the valve body and is connected with the air inlet channel, the aperture of the first threaded hole is smaller than the aperture of the groove, and the flow regulating shaft is threadedly connected in the first threaded hole.

4. The flow-adjustable gas timing valve according to claim 3, characterized in that: The flow regulating shaft is larger at the top and smaller at the bottom. An annular groove is provided in the middle of the outer wall of the larger end of the flow regulating shaft, and a sealing gasket is sleeved on the annular groove. The smaller end of the flow regulating shaft is threadedly connected to the first threaded hole. The smaller end of the flow regulating shaft extends into the air inlet channel and abuts against the chamfer of the sliding seat. A circular regulating block is integrally formed at the end of the flow regulating shaft away from the sliding seat. The diameter of the regulating block is smaller than the diameter of the larger end of the flow regulating shaft, and the regulating groove is set on the regulating block.

5. The flow-adjustable gas timing valve according to claim 4, characterized in that: A fixing ring is integrally formed on the outer wall of the first sealing ring, the aperture of the air outlet end of the air inlet passage is smaller than the outer diameter of the fixing ring, one side of the fixing ring is airtightly abutted against the inner wall of the air outlet end of the valve body, and the end of the return spring away from the sliding seat is abutted against the other side of the fixing ring.

6. A flow-adjustable 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 push 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. An adjusting spring is sleeved on the push shaft, and one end of the adjusting spring is fixedly connected to the mounting block, and the other end abuts against the shoulder adjacent to it.

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

8. The flow-adjustable gas timing valve according to claim 7, characterized in that: An indicator dial is also provided in the cavity of the valve body, and the indicator dial includes a transparent cover and a base with a center hole, a blind hole is provided on the upper surface of the base, an opaque reminder disk is fixedly connected to the upper surface of the base, an avoidance hole is provided on the reminder disk, a pointer, a warning word and an operation method are printed around the avoidance hole on the upper surface of the reminder disk, and a notch extending to the avoidance hole is provided on the outer wall of the reminder disk; a downwardly extending fixing rod 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 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-adjustable 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-adjustable 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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