Gas meter on-off control valve

Abstract

The utility model provides an on-off control valve for a gas meter, which belongs to the technical field of valves and comprises a valve body, a valve core, a transmission rod, a driver and a transmission component, the transmission component comprises a gear, a gear disc, a linkage disc part, a spring, two rolling balls and a gear cover, and the gear cover comprises a main plate body and a plurality of elastic clamping arms. A first through hole allowing one end of the transmission rod to penetrate through is formed in the main plate body, the inner diameter of the first through hole is smaller than the outer diameter of the linkage disc part, the multiple clamping arms are arranged on the edge of the main plate body at intervals in the circumferential direction, and protruding block parts are arranged on the inner walls of the clamping arms; the flange part is clamped between the convex block part and the main plate body, so that the linkage disc part is limited in the linkage groove by the main plate body; according to the utility model, the gear cover is clamped with the flange part of the gear disc through the elastic clamping arm, so that the whole assembly and disassembly are convenient, the repair and the maintenance of the transmission assembly are facilitated, and the transmission rod is prevented from being separated from the gear disc due to vibration generated during the operation of the motor.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to an on-off control valve for a gas meter. Background Art

[0002] Gas meter motor valve is a device used for gas metering and control. It is usually used in conjunction with a gas meter (gas meter) to achieve accurate metering and safe control of gas flow. The motor valve is driven by an internal motor to open or close the gas flow path, thereby controlling the gas supply.

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

[0004] The patent with publication number CN208503398U previously applied by the applicant discloses a gear for a motor valve for a gas meter, including a first gear part and a second gear part. A gear cover is provided at the open end of the second gear part. The gear cover includes an annular groove formed on the outer wall of the second gear part and an annular bulge formed on the gear cover. The structure of the gear cover leads to low disassembly and assembly efficiency and low connection strength with the gear. In particular, the vibration generated when the motor is running can easily cause the screw to come out of the gear. Utility Model Content

[0005] The purpose of the utility model is to overcome the shortcomings and deficiencies of the prior art and to provide an on-off control valve for a gas meter.

[0006] The technical scheme adopted by the utility model is as follows: the application provides a gas meter on-off control valve, including a valve body, a valve core, a transmission rod and a driver, the valve body is provided with a valve cavity and an air inlet and an air outlet connected with the valve cavity, the inner wall of the valve body is provided with a valve seat portion toward the valve cavity, and the valve seat portion is located between the air inlet and the air outlet, the valve core is arranged to move axially along the valve cavity, and has a closed state in contact with the valve seat portion and an open state separated from the valve seat portion, the driver switches the valve core between the closed state and the open state through the transmission rod, a transmission assembly is arranged between the transmission rod and the driver, the transmission assembly comprises: a gear, the gear is driven by the driver; a gear plate, the gear plate is provided with an internal tooth portion meshing with the gear on the side facing the gear, and a linkage groove is provided on the side away from the gear, the circumferential direction of the linkage groove The inner wall is provided with a linkage area, and the groove end of the linkage groove is provided with a flange portion; a linkage disk portion, the linkage disk portion is arranged on the transmission rod and is rotatably arranged relative to the linkage groove, and a mounting hole is radially through-arranged on the linkage disk portion; a spring, the spring is arranged in the mounting hole; two rolling balls, the two rolling balls are respectively arranged at both ends of the spring, and under the action of the spring, the rolling balls abut against the linkage area; and a gear cover, the gear cover comprises: a main board body, the main board body is provided with a first through hole for one end of the transmission rod to pass through, the inner diameter of the first through hole is smaller than the outer diameter of the linkage disk portion; a plurality of elastic clamping arms, the plurality of clamping arms are circumferentially spaced at the edge of the main board body, a protrusion portion is provided on the inner wall of the clamping arm, the flange portion is clamped between the protrusion portion and the main board body so that the linkage disk portion is limited in the linkage groove by the main board body.

[0007] The side of the protrusion portion facing the inner tooth portion is provided with a first slope and a second slope with the same slope direction, and the side facing the flange portion is provided with a third slope, the slope direction of the third slope is opposite to that of the first slope, and the side of the first slope close to the flange portion is inclined toward the main board body.

[0008] The slope of the first inclined surface is greater than the slope of the second inclined surface.

[0009] The slope of the first inclined surface is greater than the slope of the third inclined surface.

[0010] The second inclined surface is located on a side close to the inner tooth portion, and its slope length is greater than that of the first inclined surface. One side of the second inclined surface extends to the end of the clamping arm.

[0011] The linkage area includes at least two abutment areas with different inner diameters.

[0012] A transition slope is arranged between adjacent abutment areas with different inner diameters.

[0013] It also includes a machine base connected to the valve body, on which a transmission cavity connected to the valve cavity is arranged, and the valve core isolates the valve cavity from the transmission cavity.

[0014] The valve core comprises:

[0015] A sealing portion, the sealing portion is used to form a sealing match with the valve seat portion, the sealing portion is arranged to move along the axial direction of the valve cavity, and has a closed state in contact with the valve seat portion and an open state separated from the valve seat portion;

[0016] A telescopic portion, wherein the telescopic portion can be telescoped along the axial direction of the valve cavity;

[0017] The positioning part is clamped between the machine base and the valve body.

[0018] It also includes a positioning plate, which is arranged at the connection between the machine base and the valve body, and clamps and fixes the positioning part with the machine base and the valve body. The positioning plate is provided with a second through hole for the transmission rod to pass through.

[0019] The beneficial effects of the utility model are as follows: in the utility model, the gear cover is clamped with the flange of the gear plate by an elastic clamping arm, and the overall disassembly and assembly are convenient, which is conducive to the repair and maintenance of the transmission assembly. At the same time, the connection strength between the transmission rod and the gear plate is ensured, and the transmission rod is prevented from falling out of the gear plate due to the vibration generated when the motor is running. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, without paying creative labor, other drawings obtained based on these drawings still belong to the scope of the utility model.

[0021] Figure 1 It is a cross-sectional view of the on-off control valve of the gas meter in the utility model;

[0022] Figure 2 It is a schematic diagram of the on-off control valve of the gas meter in the utility model;

[0023] Figure 3 It is a cross-sectional view of the structure of the on-off control valve of the gas meter in the utility model;

[0024] Figure 4 It is a cross-sectional view of the transmission rod and part of the transmission assembly in the utility model;

[0025] Figure 5 It is a schematic diagram of the gear cover in the utility model;

[0026] Figure 6 It is a partial cross-sectional view of the gear cover in the utility model;

[0027] Figure 7 It is a schematic diagram of the gear plate in the utility model. DETAILED DESCRIPTION

[0028] The following description provides specific application scenarios and requirements of this specification, with the purpose of enabling those skilled in the art to make and use the contents of this specification. Various local modifications to the disclosed embodiments will be apparent to those skilled in the art, and the general principles defined herein may be applied to other embodiments and applications without departing from the spirit and scope of this specification. Therefore, this specification is not limited to the embodiments shown, but to the widest scope consistent with the claims.

[0029] In the description of the present application, it should be noted that, unless otherwise expressly specified and limited, the terms "longitudinal", "transverse", "radial", "length", "width", "thickness", "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings. These terms are mainly for better describing the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0030] Secondly, the terms "first", "second" and similar words do not indicate any order, quantity or importance, but are only used to distinguish different components and should not be understood as limitations on the embodiments of the present application.

[0031] In addition, the terms "installed", "set", "provided with", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements or components.

[0032] For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0033] Regarding the drawings of the present application, it should be clearly understood that the drawings are for illustration and description purposes only and are not intended to limit the scope of the present specification. It should also be understood that the drawings are not drawn to scale.

[0034] Embodiment 1:

[0035] like Figures 1 to 7As shown, this embodiment provides a gas meter on-off control valve, including a valve body 1, a valve core 2, a transmission rod 3 and a driver 4. The driver 4 can select a rotary driver such as a drive motor and a rotary cylinder according to actual conditions. In this embodiment, a drive motor is preferred. The valve body 1 is provided with a valve cavity 5 and an air inlet 6 and an air outlet 7 connected to the valve cavity 5. The inner wall of the valve body 1 is provided with a valve seat portion 8 in the valve cavity 5, and the valve seat portion 8 is located between the air inlet 6 and the air outlet 7. Secondly, the air inlet 6 can be multiple and arranged along the circumferential side wall of the valve body 1, which can adapt to more working conditions.

[0036] The valve core 2 is arranged to move axially along the valve cavity 5, and has a closed state in contact with the valve seat portion 8 and an open state separated from the valve seat portion 8. The driver 4 switches the valve core 2 between the closed state and the open state through the transmission rod 3. A transmission assembly is arranged between the transmission rod 3 and the driver 4, and the transmission assembly includes: a gear 9, a gear plate 10 and a linkage plate portion 15. The gear 9 is driven to rotate by the driver 4, that is, connected to the output shaft of the driver 4; the gear plate 10 is provided with an inner tooth portion 11 meshing with the gear 9 on the side facing the gear 9, and a linkage groove 12 is provided on the side away from the gear 9, the circumferential inner wall of the linkage groove 12 is provided with a linkage area 13, and the notch end of the linkage groove 12 is provided with a flange portion 1 4; the linkage disk portion 15 is arranged on the transmission rod 3 and is rotatably arranged relative to the linkage groove 12, and a mounting hole 16 is radially provided on the linkage disk portion 15; a spring 17, and the spring 17 is arranged in the mounting hole 16; two balls 18, and the two balls 18 are respectively arranged at the two ends of the spring 17, and under the action of the spring 17, the balls 18 abut against the linkage area 13; when the valve core 2 moves normally in the axial direction of the valve cavity 5, the balls 18 abut against the linkage area 13 so that the linkage disk portion 15 rotates with the gear plate 10; when the movement of the valve core 2 in the axial direction of the valve cavity 5 is limited and the driver 4 continues to drive, the balls 18 slip in the linkage area 13 so that the gear plate 10 idles. Through the above arrangement, the valve has the function of preventing the motor from being blocked and avoiding the driver 4 from being overloaded or overloaded.

[0037] In this embodiment, the transmission assembly also includes a gear cover 19, and the gear cover 19 includes: a main board body 191 and a plurality of elastic clamping arms 21. It should be understood that the plurality is at least two. The main board body 191 is provided with a first through hole 20 for one end of the transmission rod 3 to pass through. The inner diameter of the first through hole 20 is smaller than the outer diameter of the linkage disk portion 15; that is, the linkage disk portion 15 cannot pass through the first through hole 20.

[0038] The plurality of clamping arms 21 are circumferentially spaced at the edge of the main body 191, which can also be understood as being spaced circumferentially along the outer side of the first through hole 20. In this embodiment, four clamping arms 21 are preferably provided, and the intervals between adjacent clamping arms 21 should not be too large to ensure the connection strength between the clamping arms 21 and the gear plate 10. Secondly, a protrusion 22 is provided on the inner wall of the clamping arm 21, and the flange 14 is clamped between the protrusion 22 and the main body 191 so that the linkage disk portion 15 is limited in the linkage groove 12 by the main body 191.

[0039] Through the above arrangement, the gear cover 19 is clamped with the flange 14 of the gear plate 10 through the elastic clamping arm 21, and the overall disassembly and assembly are convenient, which is conducive to the repair and maintenance of the transmission assembly. At the same time, the connection strength between the transmission rod 3 and the gear plate 10 is ensured, and the transmission rod 3 is prevented from falling out of the gear plate 10 due to the vibration generated when the motor is running.

[0040] like Figure 6 As shown, the side of the protrusion portion 22 facing the inner tooth portion 11 is provided with a first inclined surface 23 and a second inclined surface 24 with the same slope, and the side facing the flange portion 14 is provided with a third inclined surface 25, the slope of the third inclined surface 25 is opposite to the slope of the first inclined surface 23, and the side of the first inclined surface 23 close to the flange portion 14 is inclined toward the inside of the main board body 191. It should be understood that the first inclined surface 23, the second inclined surface 24 and the third inclined surface 25 are all arranged in an arc shape along the flange portion 14, wherein the first inclined surface 23 and the second inclined surface 24 can guide the gear plate 10 to be inserted between each clamping arm 21 step by step, and the third inclined surface 25 is convenient for disassembly.

[0041] Furthermore, the slope of the first inclined surface 23 is greater than the slope of the second inclined surface 24 , so that the gear plate 10 can be inserted into each clamping arm 21 more smoothly, thereby improving the assembly efficiency.

[0042] Secondly, the slope of the first bevel 23 is greater than the slope of the third bevel 25 . Under correct circumstances, the difficulty of disassembly is greater than the difficulty of installation, which can also improve the connection strength between the gear plate 10 and the gear cover 19 .

[0043] Secondly, the second bevel 24 is located on the side close to the inner tooth portion 11, and its slope length is greater than the slope length of the first bevel 23. One side of the second bevel 24 extends to the end of the clamping arm 21, which can reduce the area of ​​the end of the clamping arm 21, save the material of the gear plate 10, and reduce the contact area between the clamping arm 21 and the gear plate 10.

[0044] The linkage area 13 includes at least two abutment areas 26 with different inner diameters. A transition slope 27 is provided between adjacent abutment areas 26 with different inner diameters. In this embodiment, four abutment areas are provided in a cross shape, wherein every two abutment areas 26 have the same inner diameter.

[0045] Furthermore, it also includes a base 28 connected to the valve body 1, and a transmission chamber 29 connected to the valve chamber 5 is provided on the base 28. The valve core 2 isolates the valve chamber 5 from the transmission chamber 29 to prevent the medium from entering the transmission chamber 29, thereby extending the service life of the valve.

[0046] Furthermore, the valve core 2 includes: a sealing portion 30, a telescopic portion 31 and a positioning portion 32. The sealing portion 30 is used to form a sealing match with the valve seat portion 8. In this embodiment, the sealing portion 30 is a conical surface. When it is pressed against the valve seat portion 8, the formed seal is more reliable. The sealing portion 30 is arranged to move along the axial direction of the valve cavity 5, and has a closed state in contact with the valve seat portion 8 and an open state separated from the valve seat portion 8; the telescopic portion 31 can be telescoped along the axial direction of the valve cavity 5; the telescopic portion 31 is made of elastic material. In this embodiment, the cross section of the telescopic portion 31 is in a continuous step shape. When the sealing portion 30 moves, the telescopic portion 31 will be compressed or stretched accordingly.

[0047] The positioning portion 32 is clamped between the machine base 28 and the valve body 1 .

[0048] It also includes a positioning plate 33, which is arranged at the connection between the machine base 28 and the valve body 1, and clamps the positioning part 32 with the machine base 28 and the valve body 1. The positioning plate 33 is provided with a second through hole 34 for the transmission rod 3 to pass through. The positioning plate 33 improves the stability of the valve core 2 during operation, thereby improving the reliability of the valve.

[0049] In summary, after reading this detailed disclosure, those skilled in the art will appreciate that the foregoing detailed disclosure may be presented only by way of example and may not be restrictive. Although not explicitly stated herein, those skilled in the art will appreciate that the requirements of this application encompass various reasonable changes, improvements and modifications to the embodiments. These changes, improvements and modifications are intended to be proposed by the present application and are within the spirit and scope of the exemplary embodiments of the present application.

[0050] In addition, it should be understood that in the foregoing description of the embodiments of the present application, in order to help understand a feature and for the purpose of simplifying the present application, the present application combines various features in a single embodiment, drawing or its description. However, this does not mean that the combination of these features is necessary. When reading the present application, it is entirely possible for a person skilled in the art to mark out a part of the devices as a separate embodiment. In other words, the embodiments in the present application can also be understood as the integration of multiple secondary embodiments. This is also true when the content of each secondary embodiment is less than all the features of a single aforementioned disclosed embodiment.

[0051] Finally, it should be understood that the embodiments of the application disclosed herein are explanations of the principles of the embodiments of the present application. Other modified embodiments are also within the scope of the present application. Therefore, the embodiments disclosed in the present application are merely examples and not limitations. Those skilled in the art can adopt alternative configurations according to the embodiments in the present application to implement the application in the present application. Therefore, the embodiments of the present application are not limited to the embodiments accurately described in the application.

Claims

1. A gas meter on-off control valve, comprising a valve body (1), a valve core (2), a transmission rod (3) and a driver (4); the valve body (1) is provided with a valve cavity (5) and an air inlet (6) and an air outlet (7) connected to the valve cavity (5); the inner wall of the valve body (1) is provided with a valve seat portion (8) facing into the valve cavity (5), and the valve seat portion (8) is located between the air inlet (6) and the air outlet (7); the valve core (2) is axially movable along the valve cavity (5), and has a closed state in contact with the valve seat portion (8) and an open state separated from the valve seat portion (8); the driver (4) switches the valve core (2) between the closed state and the open state through the transmission rod (3), characterized in that: A transmission assembly is provided between the transmission rod (3) and the driver (4), and the transmission assembly comprises: A gear (9), wherein the gear (9) is driven by a driver (4); A gear plate (10), wherein the side of the gear plate (10) facing the gear (9) is provided with an inner tooth portion (11) meshing with the gear (9), and the side of the gear plate (10) away from the gear (9) is provided with a linkage groove (12), the circumferential inner wall of the linkage groove (12) is provided with a linkage area (13), and the notch end of the linkage groove (12) is provided with a flange portion (14); A linkage disk portion (15), the linkage disk portion (15) being arranged on the transmission rod (3) and being rotatably arranged relative to the linkage groove (12), and a mounting hole (16) being radially penetratingly arranged on the linkage disk portion (15); A spring (17), wherein the spring (17) is arranged in the mounting hole (16); Two rolling balls (18), the two rolling balls (18) are respectively arranged at two ends of the spring (17), and under the action of the spring (17), the rolling balls (18) abut against the linkage area (13); and a gear cover (19), wherein the gear cover (19) comprises: A main board body (191), wherein the main board body (191) is provided with a first through hole (20) through which one end of the transmission rod (3) can pass, and the inner diameter of the first through hole (20) is smaller than the outer diameter of the linkage disk portion (15); A plurality of elastic clamping arms (21) are circumferentially spaced apart on the edge of a main board body (191); a convex block portion (22) is provided on the inner wall of the clamping arm (21); the flange portion (14) is clamped between the convex block portion (22) and the main board body (191) so that the linkage disk portion (15) is limited by the main board body (191) in the linkage groove (12).

2. A gas meter on-off control valve according to claim 1, characterized in that: The side of the protruding block portion (22) facing the inner tooth portion (11) is provided with a first inclined surface (23) and a second inclined surface (24) having the same slope direction, and the side of the protruding block portion (22) facing the flange portion (14) is provided with a third inclined surface (25), the slope direction of the third inclined surface (25) being opposite to the slope direction of the first inclined surface (23), and the side of the first inclined surface (23) close to the flange portion (14) is inclined toward the inside of the main board body (191).

3. A gas meter on-off control valve according to claim 2, characterized in that: The slope of the first inclined surface (23) is greater than the slope of the second inclined surface (24).

4. A gas meter on-off control valve according to claim 2, characterized in that: The slope of the first inclined surface (23) is greater than the slope of the third inclined surface (25).

5. A gas meter on-off control valve according to claim 2, characterized in that: The second inclined surface (24) is located on a side close to the inner tooth portion (11), and has a slope length greater than that of the first inclined surface (23). One side of the second inclined surface (24) extends to the end of the clamping arm (21).

6. A gas meter on-off control valve according to claim 1, characterized in that: The linkage area (13) comprises at least two abutment areas (26) with different inner diameters.

7. A gas meter on-off control valve according to claim 6, characterized in that: A transition slope (27) is provided between adjacent abutment areas (26) having different inner diameters.

8. The on-off control valve for a gas meter according to claim 1, characterized in that: It also comprises a machine base (28) connected to the valve body (1), a transmission chamber (29) communicating with the valve chamber (5) being arranged on the machine base (28), and the valve core (2) is used to isolate the valve chamber (5) from the transmission chamber (29).

9. A gas meter on-off control valve according to claim 8, characterized in that: The valve core (2) comprises: A sealing portion (30), the sealing portion (30) being used to form a sealing fit with the valve seat portion (8), the sealing portion (30) being arranged to move axially along the valve cavity (5), and having a closed state in contact with the valve seat portion (8) and an open state in separation from the valve seat portion (8); A telescopic portion (31), wherein the telescopic portion (31) can be telescoped along the axial direction of the valve cavity (5); A positioning portion (32) is clamped between the machine base (28) and the valve body (1).

10. A gas meter on-off control valve according to claim 9, characterized in that: The valve body (1) further comprises a positioning plate (33), the positioning plate (33) being arranged at the connection between the machine base (28) and the valve body (1), and clamping and fixing the positioning portion (32) with the machine base (28) and the valve body (1), and the positioning plate (33) being provided with a second through hole (34) for the transmission rod (3) to pass through.

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