Rotary valve for gas meter

Abstract

The utility model discloses a rotary valve for gas meter, including gas meter main part, the top of gas meter main part is provided with the air inlet, the surface screw thread connection of air inlet has the air pipe, the surface middle part of air pipe is provided with the valve housing, the surface rotation of valve housing is connected with valve stem, the surface fixed connection of valve stem has the identification mechanism, the lower surface sleeve of valve stem is connected with sealing mechanism. This rotary valve for gas meter, through the setting of identification mechanism, when using, manual rotation valve stem makes the indication arrow of valve stem lower surface setting on the angle plate on the valve housing surface rotation, and the user can observe the position of indication arrow on the angle plate to judge the angle size of valve plate inside valve housing, thereby realizes the effect of accurate regulation gas delivery flow, avoids the problem that " over -adjustment " or " under -adjustment " is easy to appear when adjusting, provides the convenience for the user.

Description

Technical Field

[0001] This utility model relates to the field of rotary valve technology for gas meters, and specifically to a rotary valve for gas meters. Background Technology

[0002] In gas meter valve systems, manually operated rotary valves remain widely used in gas system upgrades in older residential areas, small commercial spaces, and some cost-sensitive industrial auxiliary applications due to their advantages such as simple structure, low cost, and lack of external power supply. These valves are operated manually by rotating a knob, which in turn rotates an internal valve plate, changing the relative position of the valve plate to the gas passage, thereby controlling the flow of gas and regulating its flow rate. They are a fundamental and crucial control component in gas supply systems.

[0003] However, in practical applications, the lack of adjustment precision of existing manual rotary valves has long plagued users and maintenance personnel, becoming a prominent shortcoming affecting the safety of gas use and the accuracy of metering.

[0004] A rotary valve device for a gas meter, disclosed in publication number CN208519293U, includes a gas meter body. A valve shaft is inserted into the right side of the valve body, and a mounting component is sleeved on the right side of the valve shaft. A first blind hole is provided on the front side of a second movable block, and a connecting rod is inserted into the first blind hole. The front end of the connecting rod extends into a second blind hole and is connected to a fixing block. A spring is provided on the outer wall of the connecting rod, and a first limiting block is connected to the rear end of the connecting rod. A first semi-circular hole is provided on the front side of the second movable block. By pulling the second movable block, the first and second semi-circular holes separate, thereby allowing the valve wrench to be disassembled. During installation, pulling the second movable block aligns the first and second semi-circular holes with an annular groove. Under the restoring force of the spring, the first and second semi-circular holes lock into the annular groove, facilitating the disassembly and replacement of the valve wrench.

[0005] Currently, the core function of manually operated rotary valves is to precisely control the flow area of ​​the gas passage by changing the rotation angle of the valve plate. Existing valves lack angle indicators, making them prone to "over-adjustment" or "under-adjustment" during adjustment: when the valve needs to be completely closed, insufficient rotation angle results in the valve plate and valve body sealing surfaces not fully contacting each other, leading to micro-gas leakage. Long-term use can easily cause indoor gas concentrations to exceed standards. Excessive rotation, on the other hand, causes excessive pressure between the valve plate and sealing components, accelerating seal wear and shortening the valve's lifespan. Utility Model Content

[0006] The technical problem to be solved by this utility model is as follows: to provide a rotary valve for gas meters that is highly practical, easy to operate, and has a simple structure, thereby solving the problem mentioned in the background art that the valve plate opening and closing angle cannot be accurately controlled, and the sealing and flow stability are affected.

[0007] The objective of this utility model can be achieved through the following technical solutions: A rotary valve for a gas meter includes a gas meter body, an air inlet at the top of the gas meter body, an air inlet pipe threadedly connected to the surface of the air inlet, a valve housing at the center of the surface of the air inlet pipe, a valve stem rotatably connected to the surface of the valve housing, an marking mechanism fixedly connected to the surface of the valve stem, and a sealing mechanism sleeved on the lower surface of the valve stem. The marking mechanism includes an indicator arrow fixedly connected to the surface of the valve stem, and an angle plate is slidably connected to the bottom of the indicator arrow; The sealing mechanism includes an annular sealing ring fitted onto the lower surface of the valve stem, and a support spring is installed inside the annular sealing ring.

[0008] As a further embodiment of this utility model: a valve plate is fixedly connected to one side of the valve stem, and the valve plate is rotatably connected to the inside of the valve housing, so that the valve plate can easily control the flow rate.

[0009] As a further embodiment of this utility model: a rotating handle is fixedly connected to one side of the valve stem, and an anti-slip sleeve is fitted onto the surface of the rotating handle to facilitate anti-slip.

[0010] As a further embodiment of this utility model: a gas outlet is provided on one side edge of the top surface of the gas meter body, and a gas outlet pipe is threadedly connected to the surface of the gas outlet, which facilitates the delivery of gas.

[0011] As a further embodiment of this utility model: a display screen is provided on the surface of the gas meter body, and a button is provided on one side of the display screen, so that the display screen can easily display the readings.

[0012] As a further embodiment of this utility model: a transparent cover is hinged to the upper surface of the gas meter body, the transparent cover being made of acrylic, which facilitates the protection of the display screen.

[0013] As a further embodiment of this utility model: mounting blocks are fixedly connected to both sides of the surface of the gas meter body, and threaded posts are threadedly connected to the surface of the mounting blocks, which facilitates fixing the gas meter body.

[0014] The beneficial effects of this utility model are: 1. With the setting of the marking mechanism, when in use, the valve stem is manually rotated so that the indicator arrow on the lower surface of the valve stem rotates on the angle plate on the surface of the valve shell. The user can observe the position of the indicator arrow on the angle plate in real time to judge the angle of the valve plate inside the valve shell, thereby achieving the effect of accurately adjusting the gas delivery flow rate and avoiding the problem of "over-adjustment" or "under-adjustment" during adjustment, which provides convenience for users.

[0015] 2. By designing the sealing mechanism, during use, the sealing surface is prone to loosening due to long-term friction between the valve stem and the valve housing interface. Therefore, a support spring is installed in the annular sealing ring at the interface. The elastic potential energy provided by the support spring can provide sufficient force to make the annular sealing ring fit tightly against the sealing surface, thereby improving the sealing performance of the annular sealing ring, preventing leakage during long-term use, and extending its service life. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings.

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the signage mechanism of this utility model; Figure 3 This is a schematic diagram of the sealing mechanism of this utility model; Figure 4 This is a schematic diagram of the main structure of the gas meter of this utility model.

[0018] In the diagram: 1. Gas meter body; 2. Gas inlet interface; 3. Gas inlet pipe; 4. Valve housing; 5. Valve stem; 6. Marking mechanism; 601. Indicating arrow; 602. Angle plate; 7. Sealing mechanism; 701. Annular sealing ring; 702. Support spring; 8. Valve plate; 9. Rotating handle; 10. Gas outlet interface; 11. Gas outlet pipe; 12. Display screen; 13. Button; 14. Transparent cover; 15. Mounting block; 16. Threaded post. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0020] like Figure 1-4As shown, a rotary valve for a gas meter includes a gas meter body 1. An air inlet 2 is located on the top of the gas meter body 1. An air inlet pipe 3 is threadedly connected to the surface of the air inlet 2. A valve housing 4 is located in the middle of the surface of the air inlet pipe 3. A valve stem 5 is rotatably connected to the surface of the valve housing 4. An indicator mechanism 6 is fixedly connected to the surface of the valve stem 5. Through the indicator mechanism 6, when in use, manually rotating the valve stem 5 causes an indicator arrow 601 on the lower surface of the valve stem 5 to rotate on an angle plate 602 on the surface of the valve housing 4. The user can observe the position of the indicator arrow 601 on the angle plate 602 in real time to determine the angle of the valve plate 8 inside the valve housing 4, thereby achieving precise adjustment of the gas pressure. The gas delivery flow rate is effectively improved, avoiding the problems of "over-adjustment" or "under-adjustment" during adjustment, thus providing convenience for users. A sealing mechanism 7 is sleeved on the lower surface of the valve stem 5. Due to the long-term friction between the valve stem 5 and the valve housing 4 during use, the sealing surface is prone to loosening. Therefore, a support spring 702 is installed in the annular sealing ring 701 at the interface. The elastic potential energy provided by the support spring 702 can provide sufficient force to make the annular sealing ring 701 fit tightly against the sealing surface, thereby improving the sealing performance of the annular sealing ring 701, preventing leakage during long-term use, and extending its service life. The marking mechanism 6 includes an indicator arrow 601 fixedly connected to the surface of the valve stem 5, and an angle plate 602 is slidably connected to the bottom of the indicator arrow 601; The sealing mechanism 7 includes an annular sealing ring 701 sleeved on the lower surface of the valve stem 5, and a support spring 702 is installed inside the annular sealing ring 701. like Figure 3 As shown, a valve plate 8 is fixedly connected to one side of the valve stem 5. The valve plate 8 is rotatably connected to the inside of the valve housing 4. The valve plate 8 facilitates flow control. like Figure 3 As shown, a rotating handle 9 is fixedly connected to one side of the valve stem 5. An anti-slip sleeve is fitted onto the surface of the rotating handle 9 to prevent slipping. like Figure 4 As shown, a gas outlet 10 is provided on one side edge of the top surface of the gas meter body 1. A gas outlet pipe 11 is threadedly connected to the surface of the gas outlet 10, and the gas outlet pipe 11 facilitates the delivery of gas. like Figure 4 As shown, a display screen 12 is provided on the surface of the gas meter body 1, and a button 13 is provided on one side of the display screen 12. The display screen 12 is convenient for displaying usage parameters. like Figure 1 As shown, a transparent cover 14 is hinged to the upper surface of the gas meter body 1. The transparent cover 14 is made of acrylic and is used to protect the display screen 12. like Figure 1 As shown, mounting blocks 15 are fixedly connected to both sides of the surface of the gas meter body 1. Threaded posts 16 are threadedly connected to the surface of the mounting blocks 15, which facilitates the fixing of the gas meter body 1.

[0021] The working principle of this utility model is as follows: When in use, the valve stem 5 is manually rotated so that the indicator arrow 601 on the lower surface of the valve stem 5 rotates on the angle plate 602 on the surface of the valve housing 4. The user can observe the position of the indicator arrow 601 on the angle plate 602 in real time to judge the angle of the valve plate 8 inside the valve housing 4. During use, due to long-term friction at the interface between the valve stem 5 and the valve housing 4, the sealing surface is prone to loosening. Therefore, a support spring 702 is installed in the annular sealing ring 701 at the interface. The elastic potential energy provided by the support spring 702 can provide sufficient force to make the annular sealing ring 701 fit tightly against the sealing surface.

[0022] The above description provides a detailed account of one embodiment of the present invention. However, this description is merely a preferred embodiment and should not be construed as limiting the scope of the present invention. All equivalent variations and improvements made within the scope of the claims of the present invention should still fall within the patent coverage of the present invention.

Claims

1. A rotary valve for a gas meter, comprising a gas meter body (1), characterized in that: The gas meter body (1) is provided with an air inlet (2) at the top. An air inlet pipe (3) is threadedly connected to the surface of the air inlet (2). A valve housing (4) is provided in the middle of the surface of the air inlet pipe (3). A valve stem (5) is rotatably connected to the surface of the valve housing (4). An marking mechanism (6) is fixedly connected to the surface of the valve stem (5). A sealing mechanism (7) is sleeved on the lower surface of the valve stem (5). The marking mechanism (6) includes an indicator arrow (601) fixedly connected to the surface of the valve stem (5), and an angle plate (602) is slidably connected to the bottom of the indicator arrow (601). The sealing mechanism (7) includes an annular sealing ring (701) sleeved on the lower surface of the valve stem (5), and a support spring (702) is installed inside the annular sealing ring (701).

2. A rotary valve for a gas meter according to claim 1, characterized in that, A valve plate (8) is fixedly connected to one side of the valve stem (5), and the valve plate (8) is rotatably connected to the inside of the valve housing (4).

3. A rotary valve for a gas meter according to claim 1, characterized in that, A rotating handle (9) is fixedly connected to one side of the valve stem (5), and an anti-slip sleeve is fitted onto the surface of the rotating handle (9).

4. A rotary valve for a gas meter according to claim 1, characterized in that, The gas meter body (1) has a gas outlet (10) on one side edge of the top surface, and a gas outlet pipe (11) is threadedly connected to the surface of the gas outlet (10).

5. A rotary valve for a gas meter according to claim 1, characterized in that, The surface of the gas meter body (1) is provided with a display screen (12), and a button (13) is provided on one side of the display screen (12).

6. A rotary valve for a gas meter according to claim 1, characterized in that, The upper surface of the gas meter body (1) is hinged with a transparent cover (14), which is made of acrylic.

7. A rotary valve for a gas meter according to claim 1, characterized in that, The gas meter body (1) has mounting blocks (15) fixedly connected to both sides of its surface, and the mounting blocks (15) have threaded posts (16) threadedly connected to their surfaces.

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