A natural gas flow metering device

Abstract

This utility model relates to the field of flow meter technology, specifically disclosing a natural gas flow metering device, including a flow meter body. A valve stem is located at the upper end of the flow meter body, and a dial is located at the top of the valve stem. Connectors are located on the left and right sides of the flow meter body. A pipe connector is inserted into the end of the connector away from the flow meter body. A sealing sleeve is provided at the connection between the connector and the pipe connector. The sealing sleeve includes a first collar and a second collar. A convex-concave fitting is provided on the facing sides of the first and second collars to prevent them from loosening. After the pipe connector is inserted into the connector, the first and second collars reinforce the seal between the connector and the pipe connector. The convex-concave fitting locks the first and second collars, preventing the connector from falling off the pipe connector and ensuring that the connector and pipe connector will not loosen due to high-frequency vibration of the fluid in the pipeline, thus improving the measurement stability of the metering device.

Description

Technical Field

[0001] This utility model relates to the field of flow meter technology, and in particular to a natural gas flow metering device. Background Technology

[0002] A differential pressure flow meter is an instrument that measures flow rate based on the differential pressure generated by a flow sensing element installed in a pipeline, known fluid conditions, and the geometry of the sensing element and the pipeline.

[0003] For example, patent application number CN201921908811.6 discloses an intelligent flow meter, including a tightening nut, an interface, a retaining ring, a tube body, a marker block, and a scale alarm. A rack is provided on the outer wall of the tube body, and the scale alarm is movably connected to the rack. The tube body has an internal cavity for holding the liquid to be measured, and the marker block is located within the cavity and floats on the surface of the liquid. The retaining ring is inserted into a pre-set groove at the end of the tube body, the interface is placed at the end of the tube body, and the tightening nut is used to thread-fix the interface to the tube body. In this type of flow meter, the pipe connector is connected to an external pipeline by tightening the nut. Because gas passing through the pipeline causes high-frequency vibration, the nut may loosen due to vibration during prolonged operation, leading to loosening at the connection between the pipeline and the pipe head, thus affecting the measurement safety of the metering device. Utility Model Content

[0004] To address the aforementioned problems, this utility model proposes a natural gas flow metering device to overcome the shortcomings of existing devices.

[0005] To achieve the purpose of this utility model, the utility model is implemented through the following technical solution: a natural gas flow metering device, including a flow meter body, a valve stem at the upper end of the flow meter body, a dial at the top of the valve stem, connectors on the left and right sides of the flow meter body, and a pipe connector inserted into the end of the connector away from the flow meter body, with the pipe connector threadedly connected to the connector.

[0006] A sealing sleeve is provided at the connection between the connector and the pipe fitting. The sealing sleeve includes a first ring and a second ring. The first ring is fitted on the outside of the connector and is threadedly connected to a first external thread on the outside of the connector. The second ring is fitted on the outside of the pipe fitting and is threadedly connected to a second external thread on the outside of the pipe fitting.

[0007] The first and second collars are provided with convex and concave fittings on their facing sides to prevent the first and second collars from becoming loose.

[0008] A further improvement is that: the pipe fitting has a threaded post at one end near the connector, the threaded post is fixedly connected to the pipe fitting, the threaded post is screwed into the connector and threadedly connected to the internal thread on the inside of the connector.

[0009] A further improvement is that the convex-concave mating part includes a convex ring and a groove. The convex ring is sleeved on the outside of the connector. The convex ring is fixedly set on the side of the first sleeve ring near the second sleeve ring. The groove is opened on the side of the second sleeve ring near the first sleeve ring. The convex ring mates with the groove. The side of the convex ring is provided with a flange.

[0010] A further improvement is that multiple connecting seats are fixedly provided on the outer sides of the first and second collars, and a handle is provided on the connecting seat, with the handle tangent to the outer circle of the first collar.

[0011] A further improvement is that: an information plate is provided on the front of the flow meter body, and an indicator is provided on the information plate, the surface of which is coated with fluorescent material.

[0012] A further improvement is that: the pipe fitting has an elastic pad B on the side facing the connector, the elastic pad B is fitted on the outside of the threaded post, and the elastic pad B is fixedly connected to the pipe fitting.

[0013] A further improvement is that: an elastic pad A is provided on the side of the first sleeve ring facing the second sleeve ring, the elastic pad A is sleeved on the outside of the convex ring, and the elastic pad A is fixedly connected to the first sleeve ring.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] After the pipe fitting is inserted into the connector, the seal between the connector and the pipe fitting is strengthened by the first and second sets of rings. The convex and concave fittings can lock the first and second sets of rings, thereby preventing the connector and the pipe fitting from falling off. This ensures that the connector and the pipe fitting will not loosen due to the high-frequency vibration of the fluid in the pipeline, and improves the measurement stability of the metering device. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a structural diagram of the main body of the flow meter in this utility model.

[0018] Figure 2 This is a structural diagram of the connector and pipe fitting in this utility model when they are separated.

[0019] Figure 3 This is a structural diagram of the convex ring and groove in this utility model.

[0020] The components are as follows: 1. Flow meter body; 2. Connector; 21. First external thread; 22. Internal thread; 3. Pipe fitting; 31. Threaded post; 32. Second external thread; 4. Sealing sleeve; 41. First collar; 42. Raised ring; 43. Second collar; 44. Groove; 5. Information plate; 6. Indicator mark; 7. Valve stem; 8. Dial; 9. Connecting seat; 10. Handle; 11. Elastic pad A; 12. Elastic pad B. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0022] according to Figure 1 , 2 As shown in Figure 3, this embodiment proposes a natural gas flow metering device, including a flow meter body 1, a valve stem 7 at the upper end of the flow meter body 1, a dial 8 at the top of the valve stem 7, and connectors 2 on the left and right sides of the flow meter body 1. A pipe connector 3 is inserted into the end of the connector 2 away from the flow meter body 1, and the pipe connector 3 is threadedly connected to the connector 2.

[0023] A natural gas pipeline is connected to the left and right ends of the flow meter body 1 via pipe joint 3. A sensing probe is installed inside the flow meter body 1. When fluid filling the pipeline flows past the probe, a high-pressure distribution zone is generated in front of it, with the pressure slightly higher than the static pressure of the pipeline. According to Bernoulli's equation, the fluid velocity increases as it flows past the probe, creating a low-pressure distribution zone behind the probe, with the pressure slightly lower than the static pressure of the pipeline. After the fluid flows past the probe, a partial vacuum is created behind the probe, and vortices appear on both sides of the probe. The flow probe can accurately detect the average differential pressure generated by the average velocity of the fluid, and this is displayed on the dial 8 at the top of the valve stem 7.

[0024] A sealing sleeve 4 is provided at the connection between connector 2 and pipe fitting 3. The sealing sleeve 4 includes a first ring 41 and a second ring 43. The first ring 41 is fitted on the outside of connector 2 and threadedly connected to the first external thread 21 on the outside of connector 2. The second ring 43 is fitted on the outside of pipe fitting 3 and threadedly connected to the second external thread 32 on the outside of pipe fitting 3.

[0025] The first collar 41 and the second collar 43 are provided with concave and convex fittings on their facing sides to prevent the first collar 41 and the second collar 43 from becoming loose.

[0026] After the pipe fitting 3 is inserted into the connector 2, the first ring 41 and the second ring 43 on the outside of the connector 2 are rotated. The first ring 41 will rotate to the connection between the connector 2 and the pipe fitting 3, which strengthens the seal between the connector 2 and the pipe fitting 3. At the same time, the convex and concave fitting at the connection between the first ring 41 and the second ring 43 will lock the first ring 41 and the second ring 43, thereby preventing the connector 2 and the pipe fitting 3 from falling off. This ensures that after the flow meter body 1 has been running for a long time, the connector 2 and the pipe fitting 3 will not loosen due to the high-frequency vibration of the fluid in the pipeline, thus improving the measurement stability of the metering device.

[0027] To facilitate the connection between connector 2 and pipe fitting 3, pipe fitting 3 is fixed to connector 2 via a threaded connection. Specifically, pipe fitting 3 has a threaded post 31 at one end near connector 2. The threaded post 31 is fixedly connected to pipe fitting 3 and screwed into connector 2, where it is threaded into the internal thread 22 on the inner side of connector 2. During installation, simply rotate pipe fitting 3 to screw the threaded post 31 at the end of pipe fitting 3 into the inner side of connector 2.

[0028] Regarding concave-convex mating parts:

[0029] The convex-concave mating part includes a convex ring 42 and a groove 44. The convex ring 42 is sleeved on the outside of the connector 2. The convex ring 42 is fixedly set on the side of the first sleeve ring 41 near the second sleeve ring 43. The groove 44 is opened on the side of the second sleeve ring 43 near the first sleeve ring 41. The convex ring 42 mates with the groove 44. The side of the convex ring 42 is provided with a flange.

[0030] like Figure 3 As shown, the convex ring 42 on the first ring 41 on the left is machined using an eccentric machining process, while the second ring 43 with the groove 44 is machined using a normal center circle. When the first ring 41 and the second ring 43 are rotated, and the convex ring 42 at the end of the first ring 41 is screwed into the groove 44 on the inner side of the second ring 43, the two sides of the convex ring 42 are not symmetrical due to the presence of the flange on the convex ring 42. Therefore, when tightening the second ring 43, the second ring 43 will apply pressure from one side of the convex ring 42, thereby increasing the biting force between the first ring 41 and the connector 2 and the pipe fitting 3, thus achieving the function of locking the first ring 41 and the second ring 43, and improving the connection stability of the connector 2 and the pipe fitting 3.

[0031] To facilitate the rotation of the first and second rings 41 and 43, multiple connecting seats 9 are fixedly provided on the outer sides of the first and second rings 41 and 43. A handle 10 is provided on each connecting seat 9, and the handle 10 is tangent to the outer circle of the first ring 41. The handle 10 is fixed to the first and second rings 41 and 43 via the connecting seats 9. To rotate the first and second rings 41 and 43, simply grasp the handle 10 and rotate it.

[0032] In a preferred embodiment, the flow meter body 1 has an information panel 5 on its front side, and an indicator 6 is provided on the information panel 5. The surface of the indicator 6 is coated with a fluorescent material. The indicator 6 is used to display the flow direction, and its surface is coated with fluorescent material to ensure clear visibility in dim environments.

[0033] To enhance the seal between connector 2 and pipe fitting 3, in a preferred embodiment, pipe fitting 3 is provided with an elastic gasket B12 on the side facing connector 2. The elastic gasket B12 is fitted on the outside of threaded post 31 and is fixedly connected to pipe fitting 3.

[0034] An elastic pad A11 is provided on the side of the first sleeve ring 41 facing the second sleeve ring 43. The elastic pad A11 is fitted over the outside of the convex ring 42 and is fixedly connected to the first sleeve ring 41. The elastic pads A11 and B12 are elastic and can fill the tiny gaps between the connector 2, pipe fitting 3, and the contact surfaces of the first sleeve ring 41 and the second sleeve ring 43, preventing liquid or gas leakage. During pipe connection, slight displacement or deformation may occur due to stress; the elastic deformation capacity of the elastic pads A11 and B12 can compensate for this change and maintain the sealing effect.

[0035] How this application works:

[0036] The natural gas pipeline is connected to the left and right ends of the flow meter body 1 through the pipe joint 3. After the pipe joint 3 is inserted into the connector 2, the first ring 41 and the second ring 43 on the outside of the connector 2 are rotated. The first ring 41 will rotate to the connection between the connector 2 and the pipe joint 3, which strengthens the seal between the connector 2 and the pipe joint 3. At the same time, the convex and concave fitting at the connection between the first ring 41 and the second ring 43 will lock the first ring 41 and the second ring 43, thereby preventing the connector 2 and the pipe joint 3 from falling off. This ensures that after the flow meter body 1 has been running for a long time, the connector 2 and the pipe joint 3 will not loosen due to the high-frequency vibration of the fluid in the pipeline, thus improving the measurement stability of the metering device.

[0037] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0038] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A natural gas flow metering device comprising a flow meter body (1) having a valve stem (7) at its upper end, said valve stem (7) having a dial (8) at its top, characterized in that: The flow meter body (1) has connectors (2) on its left and right sides. A pipe connector (3) is inserted into the end of the connector (2) away from the flow meter body (1). The pipe connector (3) is threadedly connected to the connector (2). A sealing sleeve (4) is provided at the connection between the connector (2) and the pipe joint (3). The sealing sleeve (4) includes a first collar (41) and a second collar (43). The first collar (41) is fitted on the outside of the connector (2) and threadedly connected to a first external thread (21) opened on the outside of the connector (2). The second collar (43) is fitted on the outside of the pipe joint (3) and threadedly connected to a second external thread (32) opened on the outside of the pipe joint (3). The first collar (41) and the second collar (43) are provided with concave and convex fittings on their facing sides to prevent the first collar (41) and the second collar (43) from loosening.

2. A natural gas flow metering device according to claim 1, wherein: The pipe fitting (3) has a threaded post (31) at one end near the connector (2). The threaded post (31) is fixedly connected to the pipe fitting (3). The threaded post (31) is screwed into the connector (2) and threadedly connected to the internal thread (22) opened on the inner side of the connector (2).

3. A natural gas flow metering device according to claim 1, wherein: The convex-concave mating part includes a convex ring (42) and a groove (44). The convex ring (42) is sleeved on the outside of the connector (2). The convex ring (42) is fixedly disposed on the side of the first collar (41) near the second collar (43). The groove (44) is opened on the side of the second collar (43) near the first collar (41). The convex ring (42) mates with the groove (44). The side of the convex ring (42) is provided with a flange.

4. A natural gas flow metering device according to claim 1, wherein: Multiple connecting seats (9) are fixedly provided on the outer side of the first collar (41) and the second collar (43). A handle (10) is provided on the connecting seat (9), and the handle (10) is tangent to the outer circle of the first collar (41).

5. A natural gas flow metering device according to claim 1, wherein: The flow meter body (1) has an information plate (5) on the front, and the information plate (5) has an indicator (6) on it. The surface of the indicator (6) is coated with fluorescent material.

6. A natural gas flow metering device according to claim 2, wherein: The pipe joint (3) has an elastic pad B (12) on the side facing the connector (2). The elastic pad B (12) is fitted on the outside of the threaded post (31) and is fixedly connected to the pipe joint (3).

7. A natural gas flow metering device according to claim 3, wherein: The first collar (41) has an elastic pad A (11) on the side facing the second collar (43). The elastic pad A (11) is fitted on the outside of the convex ring (42) and is fixedly connected to the first collar (41).

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