A gas meter on-off control valve with secondary valve opening structure

Abstract

The utility model discloses a kind of gas meter on-off control valve with secondary valve opening structure, the opening and closing cooperation of primary valve core and primary valve seat part, the opening and closing cooperation of secondary valve core part and secondary valve seat part, constitute the secondary valve opening structure of this gas meter on-off control valve, rich the regulation form of gas passage.The first closing position when lift rod is located relative to first perforation, the primary valve core and primary valve seat part are sealed cooperation of abutting, inlet and outlet are not connected;The first open position when lift rod is located relative to first perforation, the primary valve core and primary valve seat part are sealed cooperation of abutting, inlet and outlet are connected by secondary communication hole;Lift rod is located relative to first perforation in first linkage position, primary valve core is located in second open position, inlet and outlet are connected by primary valve seat part port.

Description

Technical Field

[0001] This utility model relates to the field of gas meter on / off control valve technology, specifically to a gas meter on / off control valve with a secondary valve opening structure. Background Technology

[0002] A gas meter motor valve is a device used for gas metering and control. It is typically used in conjunction with a gas meter (coal gas meter) to achieve accurate measurement and safe control of gas flow. Driven by an internal motor, the motor valve opens or closes the gas flow path, thereby controlling the gas supply.

[0003] Gas meter motor valves are widely used in residential, commercial, and industrial gas metering systems, especially in applications requiring remote control or automated management. For example, smart gas meter systems often integrate motor valves to facilitate remote meter reading, billing, control, and safety monitoring.

[0004] The applicant's earlier patent application, application number 202421204176.4, disclosed a gas meter motor valve, which only has two states for controlling the gas flow path: fully open and fully closed, resulting in a single form of gas flow path adjustment. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings and deficiencies of the existing technology and to provide a gas meter on / off control valve with a secondary valve opening structure.

[0006] The technical solution adopted by this utility model is as follows: A gas meter on / off control valve with a secondary valve opening structure includes a valve body, a primary valve core, and a drive mechanism. The valve body is provided with a valve cavity and an inlet and an outlet communicating with the valve cavity. A primary valve seat is provided on the inner wall of the valve body into the valve cavity. The primary valve seat is located between the inlet and the outlet and cooperates with the primary valve core. The primary valve core has a first through hole and a secondary connecting hole extending through it along its axial direction. The first through hole is located at the center of the primary valve core and is fitted with a lifting rod that can move relative to its axial direction. The secondary connecting hole is arranged around the first through hole. The upper end of the primary valve core extends into the valve cavity around the secondary connecting hole, forming a secondary valve seat. The lifting rod is respectively provided with a secondary valve core portion that mates with the secondary valve seat portion and a lower limit portion that is larger than the secondary connecting hole at the upper and lower positions of the primary valve core. The driving mechanism drives the lifting rod to move along the valve cavity axis and has a first closed position relative to the first through hole, in which the secondary valve core portion and the secondary valve seat portion are tightly sealed together; a first open position in which the secondary valve core portion and the secondary valve seat portion have an open gap and the lower limit portion does not abut against the primary valve seat portion; and a first linked position in which the secondary valve core portion and the secondary valve seat portion have an open gap and the upper end of the lower limit portion abuts against the lower end of the primary valve seat portion. When the lifting rod is in the first linkage position relative to the first through hole, the lifting rod and the first-stage valve core form an upward linkage. The driving mechanism drives the lifting rod and the first-stage valve core to rise, and the first-stage valve core has a second open position with an open gap between it and the first-stage valve seat.

[0007] Preferably, a base is fixed on the valve body, the drive mechanism includes a driver and a transmission rod, the lifting rod has a first threaded slot axially extending through its upper end, the lower end of the lifting rod passes into the first threaded slot and its outer circumference has an external thread that forms a threaded engagement with the first threaded slot, and its upper end is rotatably connected to the base. The driver rotates the transmission rod, causing the lifting rod to move axially along the valve cavity.

[0008] Preferably, the drive mechanism further includes a first gear connected to the drive end of the driver, a second gear connected to the transmission rod, and a reduction gear set connected between the first gear and the second gear, wherein the diameter of the second gear is larger than that of the first gear.

[0009] Preferably, the reduction gear set includes at least three different gear shafts, each gear shaft including a large gear section and a small gear section, and each gear shaft meshes sequentially between a first gear and a second gear to form a reduction transmission.

[0010] Preferably, the base extends into the valve cavity with a shaft fixing part, the shaft fixing part is provided with a displacement groove passing through its lower end, the upper end of the lifting rod passes into the displacement groove, and the lower end of the displacement groove has a sealing part that protrudes outward from the outer periphery of the lifting rod and abuts against it.

[0011] Preferably, the sealing part includes a first sealing ring and a second sealing ring arranged axially along the displacement groove and both abutting against the outer periphery of the lifting rod.

[0012] Preferably, a spring is sleeved on the outer periphery of the lower end of the lifting rod. The spring includes a first spring segment connected between the secondary valve core and the upper end face of the primary valve core, and a second spring segment connected between the lower end face of the primary valve core and the upper end face of the lower limit part.

[0013] Preferably, the lifting rod has a second threaded hole groove extending through its lower end in the inner axial direction, and the lower limiting part includes a threaded connection part that extends into and connects to the second threaded hole groove, and a limiting plate part that abuts against the lifting rod and has a size larger than the first through hole.

[0014] The beneficial effects of this utility model are as follows: the opening and closing cooperation between the primary valve core and the primary valve seat, and the opening and closing cooperation between the secondary valve core and the secondary valve seat, constitute the secondary opening structure of the gas meter's on / off control valve, enriching the adjustment forms of the gas passage. When the lifting rod is in the first closed position relative to the first through hole, the primary valve core and the primary valve seat are tightly sealed, and the inlet and outlet are not connected; when the lifting rod is in the first open position relative to the first through hole, the primary valve core and the primary valve seat are tightly sealed, and the inlet and outlet are connected through the secondary connecting hole; when the lifting rod is in the first linked position relative to the first through hole and the primary valve core is in the second open position, the inlet and outlet are connected through the port of the primary valve seat. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, obtaining other drawings based on these drawings without creative effort still falls within the scope of this utility model.

[0016] Figure 1 This is a perspective view of the overall structure of an embodiment of the present utility model; Figure 2 This is a front sectional view of the overall structure of an embodiment of the present utility model; Figure 3 This is an embodiment of the present utility model. Figure 2 Enlarged view of the structure at point A in the middle; Figure 4 This is a partial three-dimensional view of an embodiment of the present utility model; Figure 5 This is an embodiment of the present utility model. Figure 2 Enlarged view of the structure at point B in the middle; In the diagram, 1. Valve body; 2. Primary valve core; 3. Actuator; 4. Lifting rod; 5. Transmission rod; 6. Base; 8. Spring; 11. Valve cavity; 12. Primary valve seat; 21. First through hole; 22. Secondary connecting hole; 23. Secondary valve seat; 41. Secondary valve core; 42. Lower limit; 61. Shaft fixing; 71. First gear; 72. Second gear; 73. Gear shaft; 81. First spring section; 82. Second spring section; 101. Air inlet; 102. Air outlet; 401. First threaded slot; 402. Second threaded slot; 421. Threaded connection; 422. Limiting plate; 611. Displacement groove; 612. First sealing ring; 613. Second sealing ring; 731. Large gear; 732. Small gear. Detailed Implementation

[0017] To make the objectives, technical solutions and advantages of this utility model clearer, the utility model will be described in further detail below with reference to the accompanying drawings.

[0018] It should be noted that all uses of "first" and "second" in the embodiments of this utility model are for the purpose of distinguishing two entities or parameters with the same name but different names. It is clear that "first" and "second" are only for the convenience of expression and should not be construed as limiting the embodiments of this utility model. Subsequent embodiments will not explain this in detail.

[0019] The directional and positional terms used in this utility model, such as "up," "down," "front," "back," "left," "right," "inner," "outer," "top," "bottom," and "side," are merely for reference to the accompanying drawings. Therefore, the directional and positional terms used are for the purpose of explaining and understanding this utility model, and not for limiting the scope of protection of this utility model.

[0020] like Figures 1 to 5 As shown in the figure, a gas meter on / off control valve with a secondary valve opening structure is provided in an embodiment of this utility model. It includes a valve body 1, a primary valve core 2, and a drive mechanism. The valve body 1 is provided with a valve cavity 11 and an inlet 101 and an outlet 102 communicating with the valve cavity 11. A primary valve seat 12 is provided on the inner wall of the valve body 1 into the valve cavity 11. The primary valve seat 12 is located between the inlet 101 and the outlet 102 and cooperates with the primary valve core 2. The primary valve core 2 has a first through hole 21 and a secondary connecting hole 22 extending through it along its axial direction. The first through hole 21 is located at the center of the primary valve core 2 and is fitted with a lifting rod 4 that can move relative to its axial direction. The secondary connecting hole 22 is arranged around the first through hole 21. The upper end of the primary valve core 2 extends into the valve cavity 11 around the secondary connecting hole 22, forming a secondary valve seat portion 23. The lifting rod 4 is provided with a secondary valve core 41 that cooperates with the secondary valve seat 23 above and below the primary valve core 2, and a lower limit part 42 that is larger than the secondary connecting hole 22. The driving mechanism drives the lifting rod 4 to move axially along the valve cavity 11 and has a first closed position relative to the first through hole 21 where the secondary valve core 41 and the secondary valve seat 23 are tightly sealed together, a first open position where there is an open gap between the secondary valve core 41 and the secondary valve seat 23 and the lower limit part 42 does not abut against the primary valve seat 12, and a first linked position where there is an open gap between the secondary valve core 41 and the secondary valve seat 23 and the upper end of the lower limit part 42 abuts against the lower end of the primary valve seat 12. When the lifting rod 4 is in the first linkage position relative to the first through hole 21, the lifting rod 4 and the first-stage valve core 2 form an upward linkage. The driving mechanism drives the lifting rod 4 and the first-stage valve core 2 to rise, and the first-stage valve core 2 has a second open position with an open gap with the first-stage valve seat 12.

[0021] This configuration, through the opening and closing coordination of the primary valve core and the primary valve seat, and the opening and closing coordination of the secondary valve core and the secondary valve seat, constitutes the secondary opening structure of the gas meter's on / off control valve, enriching the adjustment methods of the gas passage. When the lifting rod 4 is in the first closed position relative to the first through hole 21, the primary valve core 2 and the primary valve seat 12 are tightly sealed together, and the inlet 101 and the outlet 102 are not connected; when the lifting rod 4 is in the first open position relative to the first through hole 21, the primary valve core 2 and the primary valve seat 12 are tightly sealed together, and the inlet 101 and the outlet 102 are connected through the secondary connecting hole 22; when the lifting rod 4 is in the first linked position relative to the first through hole 21 and the primary valve core 2 is in the second open position, the inlet 101 and the outlet 102 are connected through the port of the primary valve seat 12.

[0022] A base 6 is fixed on the valve body 1. The driving mechanism includes a driver 3 and a transmission rod 5. The lifting rod 4 has a first threaded slot 401 axially extending through its upper end. The lower end of the lifting rod 4 passes into the first threaded slot 401 and has an external thread on its outer circumference that forms a threaded engagement with the first threaded slot 401. Its upper end is rotatably connected to the base 6. The driver 3 drives the transmission rod 5 to rotate, causing the lifting rod 4 to move axially along the valve cavity 11.

[0023] This design achieves the lifting function of the boom while maintaining a simplified structure, stable connection, and high control precision. The actuator is a rotary actuator, such as a motor or rotary cylinder. The primary valve core 2 has a first protrusion at at least one position around its circumference, and the valve cavity 11 has a corresponding second groove. The first protrusion is located within the second groove, and the second groove restricts the rotation of the first protrusion, allowing the primary valve core 2 to move only axially.

[0024] The drive mechanism also includes a first gear 71 connected to the drive end of the driver 3, a second gear 72 connected to the transmission rod 5, and a reduction gear set connected between the first gear 71 and the second gear 72, wherein the diameter of the second gear 72 is larger than that of the first gear 71.

[0025] This setting improves the accuracy of the opening and closing coordination between the first-stage valve core and the first-stage valve seat, as well as between the second-stage valve core and the second-stage valve seat, thereby amplifying the torque and helping to overcome the resistance to the rotation and lifting of the valve core.

[0026] The reduction gear set includes at least three different gear shafts 73, each gear shaft 73 including a large gear portion 731 and a small gear portion 732, and each gear shaft 73 meshes sequentially between a first gear 71 and a second gear 72 to form a reduction transmission.

[0027] This setting further improves the accuracy of the secondary valve opening structure and makes the valve opening and closing process smoother, reducing wear on the sealing surface caused by excessive opening and closing speed and extending the service life of the valve.

[0028] The base 6 extends into the valve cavity 11 with a shaft fixing part 61. The shaft fixing part 61 is provided with a displacement groove 611 that passes through its lower end. The upper end of the lifting rod 4 passes into the displacement groove 611. The lower end of the displacement groove 611 has a sealing part that protrudes towards the outer periphery of the lifting rod 4 and abuts against it.

[0029] This design prevents gas from entering the base and makes the rotation and lifting of the lifting rod more stable.

[0030] The sealing part includes a first sealing ring 612 and a second sealing ring 613 arranged axially along the displacement groove 611 and both abutting against the outer periphery of the lifting rod 4.

[0031] This design further improves the reliability of the seal and the stability of the lifting rod's rotation and lifting.

[0032] A spring 8 is sleeved on the outer periphery of the lower end of the lifting rod 4. The spring 8 includes a first spring segment 81 connected between the secondary valve core 41 and the upper end face of the primary valve core 2, and a second spring segment 82 connected between the lower end face of the primary valve core 2 and the upper end face of the lower limit part 42.

[0033] With this setting, the lifting rod moves more smoothly relative to the first perforation.

[0034] The lifting rod 4 is provided with a second threaded slot 402 that passes through its lower end. The lower limiting part 42 includes a threaded connection part 421 that extends into and connects to the second threaded slot 402, and a limiting plate part 422 that abuts against the lifting rod 4 and is larger in size than the first through hole 21.

[0035] This design allows for the detachable lower limit section, making it easy to replace if damaged.

[0036] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A gas meter on / off control valve with a secondary opening valve structure, comprising a valve body (1), a primary valve core (2), and a drive mechanism, wherein the valve body (1) is provided with a valve cavity (11) and an inlet (101) and an outlet (102) communicating with the valve cavity (11), and a primary valve seat (12) is provided on the inner wall of the valve body (1) into the valve cavity (11), the primary valve seat (12) being located between the inlet (101) and the outlet (102) and cooperating with the primary valve core (2), characterized in that: The primary valve core (2) has a first through hole (21) and a secondary connecting hole (22) through it along its axial direction. The first through hole (21) is located at the center of the primary valve core (2) and is provided with a lifting rod (4) that can move relative to its axial direction. The secondary connecting hole (22) is arranged around the first through hole (21). The upper end of the primary valve core (2) extends into the valve cavity (11) around the secondary connecting hole (22) and has a secondary valve seat (23). The lifting rod (4) is provided with a secondary valve core (41) that cooperates with the secondary valve seat (23) above and below the primary valve core (2), and a lower limit part (42) with a size larger than the secondary connecting hole (22). The driving mechanism drives the lifting rod (4) to move axially along the valve cavity (11) and has a first closed position relative to the first through hole (21) where the secondary valve core (41) and the secondary valve seat (23) are tightly sealed together; a first open position where there is an open gap between the secondary valve core (41) and the secondary valve seat (23) and the lower limit part (42) does not abut against the primary valve seat (12); and a first linkage position where there is an open gap between the secondary valve core (41) and the secondary valve seat (23) and the upper end of the lower limit part (42) abuts against the lower end of the primary valve seat (12). When the lifting rod (4) is in the first linkage position relative to the first through hole (21), the lifting rod (4) and the first-stage valve core (2) form an upward linkage. The driving mechanism drives the lifting rod (4) and the first-stage valve core (2) to rise, and the first-stage valve core (2) has a second open position with an open gap with the first-stage valve seat (12).

2. The gas meter on / off control valve with a secondary opening valve structure according to claim 1, characterized in that: The valve body (1) is fixed with a base (6). The drive mechanism includes a driver (3) and a transmission rod (5). The lifting rod (4) is axially provided with a first threaded slot (401) that passes through its upper end. The lower end of the lifting rod (4) is inserted into the first threaded slot (401) and its outer circumference has an external thread that forms a threaded fit with the first threaded slot (401). Its upper end is rotatably connected to the base (6). The driver (3) drives the transmission rod (5) to rotate, causing the lifting rod (4) to move axially along the valve cavity (11).

3. A gas meter on / off control valve with a secondary opening valve structure according to claim 2, characterized in that: The drive mechanism also includes a first gear (71) connected to the drive end of the driver (3), a second gear (72) connected to the transmission rod (5), and a reduction gear set connected between the first gear (71) and the second gear (72), wherein the diameter of the second gear (72) is larger than that of the first gear (71).

4. A gas meter on / off control valve with a secondary opening valve structure according to claim 3, characterized in that: The reduction gear set includes at least three different gear shafts (73), each gear shaft (73) including a large gear portion (731) and a small gear portion (732), and each gear shaft (73) meshes sequentially between a first gear (71) and a second gear (72) to form a reduction transmission.

5. A gas meter on / off control valve with a secondary opening valve structure according to claim 2, characterized in that: The base (6) extends into the valve chamber (11) with a shaft fixing part (61). The shaft fixing part (61) is provided with a displacement groove (611) that passes through its lower end. The upper end of the lifting rod (4) passes into the displacement groove (611). The lower end of the displacement groove (611) has a sealing part that protrudes towards the outer periphery of the lifting rod (4) and abuts against it.

6. A gas meter on / off control valve with a secondary opening valve structure according to claim 5, characterized in that: The sealing part includes a first sealing ring (612) and a second sealing ring (613) arranged axially along the displacement groove (611) and both abutting against the outer periphery of the lifting rod (4).

7. A gas meter on / off control valve with a secondary opening valve structure according to any one of claims 1-6, characterized in that: The lower end of the lifting rod (4) is fitted with a spring (8), which includes a first spring segment (81) connected between the secondary valve core (41) and the upper end face of the primary valve core (2), and a second spring segment (82) connected between the lower end face of the primary valve core (2) and the upper end face of the lower limit part (42).

8. A gas meter on / off control valve with a secondary opening valve structure according to any one of claims 1-6, characterized in that: The lifting rod (4) is provided with a second threaded slot (402) that passes through its lower end in the axial direction. The lower limiting part (42) includes a threaded connection part (421) that extends into the second threaded slot (402) and connects to it, and a limiting plate part (422) that abuts against the lifting rod (4) and is larger in size than the first through hole (21).

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