An independent sealed position switch structure for a built-in valve in a gas meter
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-22
- Publication Date
- 2026-08-11
AI Technical Summary
[0002]在一些情况下，燃气表内置阀依赖人工检查或压力测试判断密封性，响应延迟；在另一些情况下，燃气表内置阀到位信号开关是机械簧片结构，多是暴露在燃气环境中，长期使用存在被腐蚀风险，导致接触信号出错；还有一些用干簧管作为到位开关的燃气表内置阀容易被外部磁铁操控，存在安全漏洞；还有一些燃气表内置阀使用霍尔传感器作为到位开关成本较高
本申请中，通过开关壳体及橡胶隔离膜片将定簧片、动簧片密封起来，实现到位开关的独立密封；然后将开关壳体安装在燃气表内置阀上，在燃气表内置阀的移动套的边缘底部安装阀芯到位拨杆，在燃气表内置阀密封到位的同时，移动套带动阀芯到位拨杆向上移动至极限，阀芯到位拨杆隔着橡胶隔离膜片拨动动簧片与定簧片接触，实现了到位开关的信号输出功能，本申请成本低廉，输出稳定，使用寿命久。
Smart Images
Figure CN224625396U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of gas meter safety control equipment, and in particular to an independent sealed position switch structure for a built-in valve of a gas meter. Background Technology
[0002] In some cases, the gas meter's built-in valve relies on manual inspection or pressure testing to determine its sealing performance, resulting in a delayed response. In other cases, the gas meter's built-in valve's position signal switch is a mechanical reed structure, which is often exposed to the gas environment and is at risk of corrosion over long-term use, leading to incorrect contact signals. Some gas meter built-in valves that use reed switches as position switches are easily manipulated by external magnets, posing a safety hazard. Still others use Hall effect sensors as position switches, which are costly.
[0003] Therefore, it is necessary to develop an independent sealed position switch structure for the built-in valve of the gas meter to solve the above problems. Utility Model Content
[0004] The purpose of this invention is to design an independent sealed position switch structure for the built-in valve of a gas meter in order to solve the above problems.
[0005] This utility model achieves the above objectives through the following technical solutions: An independent sealed position switch structure for a built-in valve of a gas meter includes: Switch housing; the switch housing is fixedly installed on one side of the built-in valve of the gas meter; a slot is provided on the side of the switch housing facing the movable sleeve of the built-in valve of the gas meter; Rubber isolating diaphragm; the rubber isolating diaphragm is installed in the slot to form a sealed cavity inside the switch housing; The reed support is installed at the bottom of the sealed cavity. Fixed spring; The moving spring; the lower ends of both the fixed spring and the moving spring are mounted on the spring bracket, with the moving spring positioned close to the rubber isolating diaphragm; the fixed spring and the moving spring are connected to the outside via signal lines; a valve core positioning lever is installed at the bottom edge of the moving sleeve of the gas meter's built-in valve, which is used to move the moving spring and the fixed spring through the rubber isolating diaphragm when the moving sleeve reaches the upper limit position, thereby activating the signal.
[0006] The beneficial effects of this utility model are as follows: In this application, the fixed and moving springs are sealed by the switch housing and a rubber isolating diaphragm to achieve independent sealing of the position switch. Then, the switch housing is installed on the built-in valve of the gas meter, and the valve core position lever is installed at the bottom edge of the moving sleeve of the built-in valve. When the built-in valve of the gas meter is sealed in place, the moving sleeve drives the valve core position lever to move upward to its limit. The valve core position lever moves the moving spring to contact the fixed spring through the rubber isolating diaphragm, realizing the signal output function of the position switch. This application is low in cost, stable in output, and has a long service life. Attached Figure Description
[0007] Figure 1 This is a three-dimensional schematic diagram of the shape of the independent sealed position switch; Figure 2 This is a schematic diagram of the internal structure of an independently sealed position switch; Figure 3 This is a schematic diagram of the structure of an independent sealed position switch installed on the built-in valve of a gas meter. Figure 4 This is a schematic diagram of the internal structure of an independently sealed in-place switch installed on the built-in valve of a gas meter.
[0008] In the diagram, 1-Independent sealed position switch, 11-Switch housing, 12-Rubber isolating diaphragm, 13-Metal barrier lever, 14-Spring bracket, 15-Fixed spring, 16-Moving spring, 17-Outlet rubber nail, 2-Gas meter built-in valve; 21-Valve core position lever, 22-Position switch mounting base. Detailed Implementation
[0009] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0010] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.
[0011] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0012] In the description of this utility model, it should be understood that the terms "upper", "lower", "inner", "outer", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use, or the orientation or positional relationship that is commonly understood by those skilled in the art. They are only used to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0013] Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.
[0014] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, terms such as "set" and "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0015] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings.
[0016] like Figure 1 and 3 As shown, a structure for an independent sealed position switch 1 for a built-in valve of a gas meter includes: Switch housing 11; Switch housing 11 is fixedly installed on one side of the built-in valve 2 of the gas meter; The switch housing 11 has a slot on the side facing the movable sleeve of the built-in valve 2 of the gas meter; Rubber isolation diaphragm 12; The rubber isolation diaphragm 12 is installed in the slot by ultrasonic welding to form a sealed cavity in the switch housing 11; Spring support 14; Spring support 14 is installed at the bottom of the sealed cavity; Fixed spring 15; The lower ends of the movable spring 16, fixed spring 15, and movable spring 16 are all mounted on the spring bracket 14, with the movable spring 16 positioned close to the rubber isolation diaphragm 12; the fixed spring 15 and movable spring 16 are respectively connected to the outside via signal lines; a valve core positioning lever 21 is installed at the bottom edge of the movable sleeve of the gas meter's built-in valve 2.
[0017] A metal blocking lever 13 is provided. The lower fixed end of the metal blocking lever 13 is mounted on the switch housing 11, and the upper part of the metal blocking lever 13 is positioned near the outer side of the rubber isolation diaphragm 12. When the valve core positioning lever 21 reaches the upper limit position, it moves the metal blocking lever 13, which, through the rubber isolation diaphragm 12, moves the moving spring 16 to contact the fixed spring 15, thus connecting the signal. The metal blocking lever 13 provides some protection for the rubber isolation diaphragm 12 and also improves the contact reliability of the internal spring when the gas meter's built-in moving device presses down the lever. This is because if the valve core positioning lever 21 directly contacts the rubber isolation diaphragm 12 at a single point, the rubber isolation diaphragm 12 may be crushed and damaged. However, by contacting the rubber isolation diaphragm 12 through the metal blocking lever 13, it becomes a surface contact, making the deformation of the rubber isolation diaphragm 12 controllable and less likely to damage it. This improves the contact reliability of the internal spring when the gas meter's built-in moving device presses down the lever.
[0018] In some embodiments, such as Figure 1-4 As shown, the upper part of the metal blocking lever 13 and the upper part of the moving spring 16 are both tilted toward the moving sleeve side of the built-in valve 2 of the gas meter.
[0019] In some embodiments, such as Figure 1-4 As shown, the upper outer part of the rubber isolation diaphragm 12 is inclined toward the moving sleeve side of the built-in valve 2 of the gas meter.
[0020] In some embodiments, the upper part of the metal barrier tweezers 13, the upper part of the movable spring 16, and the upper outer part of the rubber isolation diaphragm 12 have the same inclined shape. This structural design is intended to ultimately achieve a more stable contact between the fixed spring 15 and the movable spring 16.
[0021] In some embodiments, such as Figure 3-4 As shown, the motor housing of the built-in valve 2 of the gas meter is provided with multiple position switch mounting bases 22, and the lower end of the switch housing 11 is connected to the multiple position switch mounting bases 22 by multiple bolts.
[0022] In some embodiments, such as Figure 2 As shown, a lead-out rubber pin 17 is also embedded on the outer side of the switch housing 11, through which the signal line passes. In this application, after the spring contact is wired, it passes through the lead-out hole of the switch housing 11 and then through the lead-out rubber pin 17, thus realizing the signal line output of the position signal and the interface sealing.
[0023] In some embodiments, such as Figure 4As shown, the valve core positioning lever 21 includes an L-shaped connecting seat and a hemispherical contact head. The first end of the L-shaped connecting seat is connected to the bottom edge of the moving sleeve of the gas meter's built-in valve 2. The bottom of the hemispherical contact head is mounted on the second end of the L-shaped connecting seat. The top spherical surface of the hemispherical contact head is used to actuate the metal blocking plate 13. Through the interaction between the top spherical surface of the hemispherical contact head and the actuating metal blocking plate 13, friction with the metal blocking plate 13 is less likely to affect the upward movement of the valve core of the gas meter's built-in valve 2.
[0024] Working principle: When the built-in valve 2 of the gas meter is closed during operation, the valve core moves upward, driving the valve core positioning lever 21 upward as well. When the valve core reaches the top closed position, the valve core positioning lever 21 fully presses down the metal blocking plate 13. The metal blocking plate 13 presses down the rubber isolation diaphragm 12 and the internal fixed spring 15 and moving spring 16. The fixed spring 15 and moving spring 16 come into contact, the signal is connected, and the closed signal is detected on the outside.
[0025] The above are merely preferred embodiments of this utility model. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model.
Claims
1. A gas meter built-in valve with an independently sealed position switch structure, characterized in that, include: Switch housing; the switch housing is fixedly installed on one side of the built-in valve of the gas meter; a slot is provided on the side of the switch housing facing the movable sleeve of the built-in valve of the gas meter; Rubber isolating diaphragm; the rubber isolating diaphragm is installed in the slot to form a sealed cavity inside the switch housing; The reed support is installed at the bottom of the sealed cavity. Fixed spring; The moving spring; the lower ends of both the fixed spring and the moving spring are mounted on the spring bracket, with the moving spring positioned close to the rubber isolating diaphragm; the fixed spring and the moving spring are connected to the outside via signal lines; a valve core positioning lever is installed at the bottom edge of the moving sleeve of the gas meter's built-in valve, which is used to move the moving spring and the fixed spring through the rubber isolating diaphragm when the moving sleeve reaches the upper limit position, thereby activating the signal.
2. The independent sealed position switch structure for the built-in valve of a gas meter according to claim 1, characterized in that, The independent sealed position switch also includes a metal blocking lever. The lower fixed end of the metal blocking lever is mounted on the switch housing, and the upper part of the metal blocking lever is located near the outer side of the rubber isolation diaphragm.
3. The independent sealed position switch structure for the built-in valve of a gas meter according to claim 2, characterized in that, The upper part of the metal barrier lever and the upper part of the moving spring are both tilted toward the moving sleeve of the built-in valve of the gas meter.
4. The independent sealed position switch structure for the built-in valve of a gas meter according to claim 3, characterized in that, The upper outer part of the rubber diaphragm is tilted toward the moving sleeve of the built-in valve of the gas meter.
5. The independent sealed position switch structure for the built-in valve of a gas meter according to claim 1, characterized in that, The gas meter's built-in valve has multiple position switch mounting bases on its motor housing, and the lower end of the switch housing is connected to the multiple position switch mounting bases by multiple bolts.
6. The independent sealed position switch structure for the built-in valve of a gas meter according to claim 1, characterized in that, The outer side of the switch housing is also fitted with a lead-out rubber pin, through which the signal line passes.
7. The independent sealed position switch structure for the built-in valve of a gas meter according to claim 3, characterized in that, The valve core positioning lever includes an L-shaped connecting seat and a hemispherical contact head. The first end of the L-shaped connecting seat is connected to the bottom edge of the moving sleeve of the built-in valve of the gas meter. The bottom of the hemispherical contact head is installed on the second end of the L-shaped connecting seat. The top spherical surface of the hemispherical contact head is used to actuate the metal blocking lever.