A pipeline flow metering system

Abstract

This application relates to the field of pipelines, and in particular to a pipeline flow metering system, comprising a pipe body, a ball valve, a pressure reducing valve, and a water meter. The ball valve, pressure reducing valve, and water meter are sequentially and alternately connected to the pipe body. Fluid passes through the ball valve, then sequentially through the pressure reducing valve and the water meter. The pressure reducing valve automatically adjusts the fluid pressure within the pipe body to a set pressure. The arrangement of the pipe body, ball valve, pressure reducing valve, and water meter in this application maintains a linear relationship between impeller speed and flow rate, improves metering accuracy, avoids metering errors caused by pressure fluctuations, and ensures that the water meter is not subjected to prolonged high pressure, preventing aging or detachment of the water meter's sealing ring. This ensures the stability of the water meter's operation and extends its service life.

Description

Technical Field

[0001] This application relates to the field of pipelines, and more particularly to a pipeline flow metering system. Background Technology

[0002] Pipelines are tubular structures used to transport fluids and are widely used in industrial, civil, and municipal applications. Pipelines are typically equipped with ball valves and water meters. Ball valves act as the "master switch" of the pipeline, used to quickly cut off or open the flow of fluid, while water meters are used to measure the cumulative flow of fluid in the pipeline for billing, energy consumption analysis, or process monitoring.

[0003] However, when the water pressure in the pipeline exceeds the rated working pressure of the water meter, the high pressure can easily cause the sealing ring inside the water meter to age or fall off, leading to leakage, accelerating the wear of the water meter, and thus shortening the service life of the water meter. Summary of the Invention

[0004] To address the issue of water meter lifespan, this application provides a pipeline flow metering system.

[0005] This application provides a pipeline flow metering system, which adopts the following technical solution: A pipeline flow metering system includes a pipe body, a ball valve, a pressure reducing valve, and a water meter. The ball valve, pressure reducing valve, and water meter are connected sequentially and at intervals on the pipe body. Fluid passes through the ball valve and then sequentially through the pressure reducing valve and the water meter. The pressure reducing valve automatically adjusts the fluid pressure in the pipe body to a set pressure.

[0006] By adopting the above technical solution, the fluid enters the inner cavity of the pipe through the ball valve and passes through the pressure reducing valve and the water meter in sequence. The pressure reducing valve automatically adjusts the fluid pressure in the pipe to the set pressure. The water meter measures the cumulative flow of the fluid in the pipe. The pressure reducing valve ensures that the fluid passes through the water meter at the designed flow rate by stabilizing the pressure, maintaining the linear relationship between the impeller speed and the flow rate, improving the metering accuracy, avoiding metering errors caused by pressure fluctuations, and ensuring that the water meter is not easily subjected to high pressure for a long time, which could lead to the aging or detachment of the water meter's sealing ring. This ensures the stability of the water meter's operation and extends the service life of the water meter.

[0007] Optionally, a pressure gauge is also included, which is connected to the pipe body and located between the ball valve and the pressure reducing valve. The pressure gauge is used to monitor the pressure of the fluid inside the pipe body.

[0008] By adopting the above technical solution, pressure gauge 1 is installed on the pipe body and is located between the ball valve and the pressure reducing valve. Pressure gauge 1 monitors the pressure at the pipe inlet in real time, thereby ensuring that the system operates within a safe pressure range.

[0009] Optionally, a second pressure gauge is also included, which is connected to the pipe body and located on the side of the water meter away from the pressure reducing valve. The second pressure gauge is used to monitor the pressure of the fluid inside the pipe body.

[0010] By adopting the above technical solution, pressure gauge 2 is installed on the pipe body and is located on the side of the water meter away from the pressure reducing valve. Pressure gauge 2 monitors the outlet pressure after pressure reduction in real time to verify whether the pressure reducing valve is in normal working condition. When the outlet pressure is abnormal, the staff can adjust the pressure reducing valve or troubleshoot the fault in time, thereby improving the safety of the pipeline system.

[0011] Optionally, a filter valve is connected inside the pipe, located between the water meter and the pressure reducing valve, and the filter valve is capable of filtering impurities from the fluid inside the pipe.

[0012] By adopting the above technical solution, the filter valve is installed on the inner wall of the pipe body and is located between the water meter and the pressure reducing valve. The filter valve can filter impurities in the fluid in the pipe body to prevent blockage or damage to downstream equipment. The filter valve is installed after the pressure reducing valve to avoid impurities jamming the valve core of the pressure reducing valve and extend the service life of the pressure reducing valve. The filter valve is located before the water meter, thereby ensuring that the metering accuracy of the water meter is not affected by impurities.

[0013] Optionally, a check valve is connected inside the pipe body. The check valve is located between the water meter and the second pressure gauge, and the check valve allows the fluid inside the pipe body to flow to the second pressure gauge.

[0014] By adopting the above technical solution, the check valve is installed on the inner wall of the pipe body and is located between the water meter and the second pressure gauge. The check valve allows the fluid in the pipe body to flow unidirectionally to the second pressure gauge, preventing the fluid in the pipe body from flowing back, protecting the water meter and filter valve and other equipment from damage caused by backflow impact, maintaining stable system pressure, and avoiding pollution or accidents.

[0015] Optionally, the ball valve includes a valve body, a ball, a valve stem, a rotating ring, a valve seat, and a handle. The valve body has an inlet and an outlet on both sides, both of which are connected to the valve body's internal cavity. The ball is rotatably connected to the inner wall of the valve body's internal cavity. The valve seat is connected to the inner wall of the valve body, and the surface of the valve seat abuts against the surface of the ball to form a seal. An inlet hole is formed on the surface of the ball, penetrating both sides of the ball. One end of the valve stem passes through the surface of the valve body and is connected to the surface of the ball, while the other end of the valve stem is connected to the surface of the handle. The axis of the valve stem and the axis of the inlet hole are perpendicular to each other. The inner wall of the rotating ring is coaxially connected to the outer circumferential surface of the valve body near the outlet. The end of the valve body with the outlet is rotatably connected to the inner wall of a pipe, and the inner wall of the pipe has a coaxially formed rotating cavity for the rotating ring to be embedded in. The surface of the rotating ring abuts against the inner wall of the rotating cavity and limits the valve body to the pipe body.

[0016] By adopting the above technical solution, when the inlet hole connects the inlet and outlet, the fluid enters the valve body cavity through the inlet and enters the pipe body cavity through the outlet. The valve seat surface presses against the ball surface to form a seal, preventing fluid leakage. The operator rotates the handle to drive the valve stem and ball to rotate, achieving precise control of the opening and closing of the ball valve. When the installation position of the pipe body makes it inconvenient for the operator to rotate the handle, the valve body is driven to rotate around the pipe body axis to adjust the direction of the handle, so that the drive end of the handle faces the operator, thereby facilitating the control of the opening and closing of the ball valve. In addition, the rotating ring surface abuts against the inner wall of the rotating cavity and limits the valve body to the pipe body, making it difficult for the ball valve to detach from the pipe body, thereby improving the connection stability between the ball valve and the pipe body.

[0017] Optionally, a sealing assembly is connected between the valve body and the pipe body. The sealing assembly includes a sealing ring. The valve body has a sealing cavity coaxially formed on the outer circumferential surface facing the inner wall of the pipe body for the sealing ring to be embedded. The inner wall of the pipe body has a sealing groove coaxially formed for the sealing ring to be embedded. The inner wall of the sealing cavity and the inner wall of the sealing groove clamp the two sides of the sealing ring to form a seal, and the sealing ring is located on the side of the rotating ring away from the pressure reducing valve.

[0018] By adopting the above technical solution, the sealing ring is located on the side of the rotating ring away from the pressure reducing valve, and the inner wall of the sealing cavity and the inner wall of the sealing groove clamp the two sides of the sealing ring to form a seal, so that the fluid in the pipe body is not easy to overflow from the tightness between the inner wall of the pipe body and the outer peripheral surface of the valve body, thereby improving the stability of the pipeline system operation.

[0019] Optionally, the sealing assembly further includes a limiting ring, a slider, and multiple limiting strips. The limiting ring is coaxially sleeved on the end of the valve body near the inlet, and the limiting ring is located on the side of the sealing ring away from the rotating ring. The slider is connected to the inner wall of the limiting ring. The surface of the valve body has a slide for the slider to slide. The sliding direction of the slider is parallel to the axis of the pipe body. The ends of the multiple limiting strips are connected at intervals around the axis of the limiting ring on the surface of the limiting ring facing the pipe body. The surface of the pipe body has multiple limiting grooves for the ends of the limiting strips to be embedded. The surface of the limiting strips abuts against the inner wall of the limiting grooves and limits the rotation of the valve body on the pipe body.

[0020] By adopting the above technical solution, when it is necessary to adjust the orientation of the valve body, the limiting ring is driven to slide along the surface of the valve body in a direction away from the pipe body, the end of the limiting strip disengages from the limiting groove, the valve body is driven to rotate to a suitable orientation, the limiting ring is driven to slide along the surface of the valve body in a direction closer to the pipe body, the end of the limiting strip is embedded in the limiting groove, the inner wall of the limiting groove abuts against the end face of the limiting strip and limits the rotation of the valve body on the pipe body, thereby improving the stability of the orientation of the valve body on the pipe body, and the slider slides on the inner wall of the slide rail, making it less likely for the limiting ring to deflect on the surface of the valve body, thereby improving the stability of the sliding of the limiting ring on the surface of the valve body.

[0021] Optionally, the sealing assembly further includes an elastic element, one end of which is connected to the inner wall of the slide in the direction of elastic force, and the other end of which is connected to the surface of the slider. The elastic element has the elastic force to drive the slider to slide closer to the tube body, and the end of the limiting strip tends to be embedded in the limiting groove.

[0022] By adopting the above technical solution, the elastic force of the elastic element drives the slider to slide along the inner wall of the slideway towards the tube body, which in turn drives the limiting ring to slide along the surface of the valve body towards the tube body. The end of the limiting strip is embedded in the limiting groove, and the inner wall of the limiting groove abuts against the surface of the limiting strip and limits the rotation of the valve body, making it difficult for the end of the limiting strip to fall out of the limiting groove, thereby further improving the stability of the valve body rotation.

[0023] Optionally, the sealing groove connects multiple limiting grooves, and the end of the limiting strip can pass through the limiting groove, embed itself in the sealing groove, and squeeze the sealing ring surface. The sealing ring is deformed under pressure, and the inner wall of the sealing groove and the inner wall of the sealing cavity abut against both sides of the sealing ring to form a seal.

[0024] By adopting the above technical solution, when the valve body orientation is adjusted, the limiting ring is released, and the elastic force of the elastic element drives the slider to move along the inner wall of the slideway towards the direction closer to the pipe body. This causes the limiting ring to slide along the surface of the valve body towards the direction closer to the pipe body. The end of the limiting strip passes through the limiting groove and is embedded in the sealing groove, squeezing the surface of the sealing ring. The sealing ring is deformed under pressure, and the inner wall of the sealing groove and the inner wall of the sealing cavity press against both sides of the sealing ring to form a seal, further improving the sealing stability between the pipe body and the ball valve.

[0025] In summary, this application includes at least one of the following beneficial technical effects: The configuration of the pipe body, ball valve, pressure reducing valve and water meter maintains the linear relationship between impeller speed and flow rate, improves metering accuracy, avoids metering errors caused by pressure fluctuations, ensures that the water meter is not under high pressure for a long time, which may cause the water meter seal ring to age or fall off, ensures the stability of water meter operation, and thus extends the service life of the water meter. Pressure gauge 1 is set up to monitor the pressure at the pipe inlet in real time, thereby ensuring that the system operates within a safe pressure range; Pressure gauge 2 is set up to monitor the outlet pressure after pressure reduction in real time, verifying whether the pressure reducing valve is in normal working condition. When the outlet pressure is abnormal, the staff can adjust the pressure reducing valve or troubleshoot the fault in time, thereby improving the safety of the pipeline system. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure in an embodiment of this application.

[0027] Figure 2 This is a cross-sectional view of an embodiment of this application.

[0028] Figure 3 yes Figure 2 The enlarged view at point A in the middle mainly shows the sealing components.

[0029] Explanation of reference numerals in the attached drawings: 1. Pipe body; 11. Rotating cavity; 12. Sealing groove; 13. Limiting groove; 2. Ball valve; 21. Valve body; 211. Inlet; 212. Outlet; 213. Sealing cavity; 214. Slide rail; 22. Ball; 221. Inlet hole; 23. Valve stem; 24. Rotating ring; 25. Valve seat; 26. Handle; 3. Pressure reducing valve; 4. Water meter; 5. Pressure gauge one; 6. Pressure gauge two; 7. Filter valve; 8. Check valve; 9. Sealing assembly; 91. Sealing ring; 92. Limiting ring; 93. Sliding block; 94. Elastic element; 95. Limiting strip. Detailed Implementation

[0030] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0031] This application discloses a pipeline flow metering system. (Refer to...) Figure 1 and Figure 2 A pipeline flow metering system includes a pipe body 1, a ball valve 2, a pressure reducing valve 3, a water meter 4, a pressure gauge 5, and a pressure gauge 6. The ball valve 2, pressure gauge 5, pressure reducing valve 3, water meter 4, and pressure gauge 6 are sequentially and alternately connected to the surface of the pipe body 1. Fluid enters the inner cavity of the pipe body 1 through the ball valve 2 and passes sequentially through pressure gauge 5, pressure reducing valve 3, water meter 4, and pressure gauge 6 before being discharged. The ball valve 2 controls the flow of fluid within the pipe body 1. Pressure gauge 5 monitors the pressure at the inlet of the pipe body 1 in real time, ensuring the pipeline system operates within a safe pressure range. The pressure reducing valve 3 automatically adjusts the fluid pressure within the pipe body 1 to a set pressure. The water meter 4 measures the cumulative flow of fluid within the pipe body 1. The pressure reducing valve 3 ensures that the fluid passes through the water meter 4 at the designed flow rate by stabilizing the pressure, maintaining the linear relationship between the impeller speed and flow rate in the water meter 4, improving metering accuracy, avoiding metering errors caused by pressure fluctuations, and ensuring that the water meter 4 is not under high pressure for a long time, which may lead to aging or detachment of the sealing ring of the water meter 4, thus ensuring the stability of the operation of the water meter 4 and extending its service life. The pressure gauge 6 monitors the outlet pressure of the fluid after pressure reduction in the pipe body 1 in real time, verifying whether the pressure reducing valve 3 is in normal working condition. When the outlet pressure is abnormal, the staff can adjust the pressure reducing valve 3 in time or troubleshoot the fault, thereby improving the safety of the pipeline system.

[0032] Reference Figure 1 and Figure 2A filter valve 7 is installed on the inner wall of the pipe body 1. The filter valve 7 is located between the water meter 4 and the pressure reducing valve 3. The filter valve 7 can filter impurities in the fluid inside the pipe body 1, prevent blockage or damage to downstream equipment, avoid impurities from jamming the valve core of the pressure reducing valve 3, extend the service life of the pressure reducing valve 3, and ensure that the metering accuracy of the water meter 4 is not affected by impurities.

[0033] Reference Figure 1 and Figure 2 A check valve 8 is installed on the inner wall of the pipe body 1. The check valve 8 is located between the water meter 4 and the pressure gauge 6. The check valve 8 allows the fluid in the pipe body 1 to flow unidirectionally to the pressure gauge 6, preventing the fluid in the pipe body 1 from flowing back. This protects the water meter 4 and filter valve 7 from damage caused by backflow, maintains the pressure stability of the pipeline system, avoids pollution or accidents, and thus ensures the stability of the pipeline system operation.

[0034] Reference Figure 2 and Figure 3 The ball valve 2 includes a valve body 21, a ball 22, a valve stem 23, a rotating ring 24, a valve seat 25, and a handle 26. The valve body 21 has an inlet 211 and an outlet 212 on both sides along its axial direction, both of which are connected to the inner cavity of the valve body 21. The ball 22 is rotatably connected to the inner wall of the valve body 21, with its outer circumferential surface abutting against the inner wall of the valve body 21 and separating the inlet 211 and outlet 212. An inlet hole 221 is provided on the surface of the ball 22, extending along its own axis through both sides of the ball 22. The valve stem 23... One end of the valve stem 23 passes through the surface of the valve body 21 and is fixed to the surface of the ball 22. The other end of the valve stem 23 is fixed to the surface of the handle 26. The axis of the valve stem 23 and the axis of the valve body 21 are perpendicular to each other, and the axis of the inlet hole 221 and the axis of the valve stem 23 are perpendicular to each other. When the handle 26 is rotated, the ball 22 is driven to rotate on the inner wall of the valve body 21 through the valve stem 23. When the inlet hole 221 connects the inlet 211 and the outlet 212, the fluid enters the inner cavity of the valve body 21 through the inlet 211 and is discharged from the outlet 212 through the inlet hole 221, thereby realizing the opening and closing of the ball valve 2.

[0035] Reference Figure 2 and Figure 3 The valve body 21 has an outlet 212 at one end that is rotatably connected to the inner wall of the pipe body 1. The inner wall of the rotating ring 24 is integrally formed and coaxially fixed to the outer circumferential surface of the valve body 21 facing the inner cavity of the pipe body 1. The inner wall of the pipe body 1 is coaxially provided with a rotating cavity 11 for the rotating ring 24 to be embedded. When the valve body 21 rotates on the pipe body 1, it drives the rotating ring 24 to rotate on the inner wall of the rotating cavity 11. The surface of the rotating ring 24 abuts against the inner wall of the rotating cavity 11 and limits the valve body 21 on the pipe body 1, thereby improving the stability of the ball valve 2 rotating on the pipe body 1.

[0036] Reference Figure 2 and Figure 3A sealing assembly 9 is connected between the valve body 21 and the pipe body 1. The sealing assembly 9 can enhance the sealing performance between the inner wall of the pipe body 1 and the outer circumferential surface of the valve body 21. The sealing assembly 9 includes a sealing ring 91, a limiting ring 92, a slider 93, an elastic element 94, and multiple limiting strips 95. The sealing ring 91 can be made of rubber or silicone. In this embodiment, the sealing ring 91 is made of rubber and has a certain deformation capability. The valve body 21 has a sealing cavity 213 coaxially opened on the outer circumferential surface facing the inner cavity of the pipe body 1 for the inner ring of the sealing ring 91 to be embedded. The sealing cavity 213 is located on the side of the rotating ring 24 away from the pressure reducing valve 3. The inner wall of the pipe body 1 has a sealing groove 12 coaxially opened for the outer ring of the sealing ring 91 to be embedded. The inner wall of the sealing cavity 213 and the inner wall of the sealing groove 12 clamp the two sides of the sealing ring 91 to form a seal, so that the fluid in the pipe body 1 is not easy to overflow from the joint between the inner wall of the pipe body 1 and the outer circumferential surface of the valve body 21, thereby improving the stability of the fluid transported by the pipe body 1.

[0037] Reference Figure 2 and Figure 3 The inner ring of the limiting ring 92 is coaxially sleeved on the end of the valve body 21 near the inlet 211. The limiting ring 92 is located on the side of the sealing ring 91 away from the rotating ring 24. The end of the slider 93 is connected to the inner wall of the limiting ring 92. The surface of the valve body 21 is provided with a slide 214 for the slider 93 to slide. The sliding direction of the slider 93 is parallel to the axis of the valve body 21. The ends of multiple limiting strips 95 are connected at intervals around the axis of the limiting ring 92 on the surface of the limiting ring 92 facing the pipe body 1. The surface of the pipe body 1 is provided with multiple limiting grooves 13 for the ends of the limiting strips 95 to be embedded. The end face of the limiting strip 95 can abut against the inner wall of the limiting groove 13 and limit the rotation of the valve body 21 on the pipe body 1, thereby improving the stability of the ball valve 2 on the pipe body 1.

[0038] Reference Figure 2 and Figure 3 The sealing groove 12 connects to multiple limiting grooves 13. The elastic element 94 can be a compression spring or a tension spring. In this embodiment, the elastic element 94 is a compression spring, which has a certain deformation capability. One end of the elastic element 94 in the elastic direction is connected to the inner wall of the slide 214, and the other end of the elastic element 94 in the elastic direction is connected to the surface of the slider 93 away from the limiting strip 95. The elastic element 94 has the elastic force to drive the slider 93 to slide towards the tube body 1, and the end of the limiting strip 95 passes through the limiting groove 13, embeds itself in the sealing groove 12, and squeezes the sealing ring 91 ring surface.

[0039] Reference Figure 2 and Figure 3When it is necessary to adjust the orientation of the ball valve 2 on the pipe body 1, the limiting ring 92 is pushed to slide away from the pipe body 1 along the surface of the valve body 21, causing the limiting strip 95 to disengage from the limiting groove 13. The limiting effect of the valve body 21 disappears, and the pressure on the sealing ring 91 disappears. The sealing ring 91 rebounds by its own elasticity, driving the valve body 21 to rotate, so that the handle 26 is facing the operator for easy rotation. The limiting ring 92 is released, and the elastic element 94 drives the slider 93 to slide closer to the pipe body 1. The end of the limiting strip 95 passes through the limiting groove 13 and is embedded in the sealing groove 12, squeezing the surface of the sealing ring 91. The surface of the sealing ring 91 is deformed under pressure, and the inner wall of the sealing groove 12 and the inner wall of the sealing cavity 213 are pressed against the two sides of the sealing ring 91 to form a seal, further improving the sealing stability between the pipe body 1 and the ball valve 2.

[0040] The implementation principle of a pipeline flow metering system according to an embodiment of this application is as follows: When the pipeline system is installed, the fluid enters the inner cavity of the pipe body 1 through the ball valve 2 and passes sequentially through pressure gauge 5, pressure reducing valve 3, filter valve 7, water meter 4, check valve 8, and pressure gauge 6 before being discharged. The ball valve 2 is used to control the flow of fluid in the pipe body 1. Pressure gauge 5 monitors the pressure at the inlet of the pipe body 1 in real time, thereby ensuring that the pipeline system operates within a safe pressure range. Pressure reducing valve 3 automatically adjusts the fluid pressure in the pipe body 1 to the set pressure. Filter valve 7 filters impurities in the fluid in the pipe body 1 to prevent blockage or damage to downstream equipment, avoids impurities from jamming the valve core of pressure reducing valve 3, extends the service life of pressure reducing valve 3, and ensures that the metering accuracy of water meter 4 is not affected by impurities. Water meter 4 measures the cumulative flow of fluid in the pipe body 1. Pressure reducing valve 3 ensures that the fluid passes through water meter 4 at the designed flow rate by stabilizing the pressure, maintaining... The linear relationship between impeller speed and flow rate in water meter 4 improves metering accuracy, avoids metering errors caused by pressure fluctuations, and ensures that water meter 4 is not prone to aging or falling off of its sealing ring due to prolonged high pressure. This ensures the stability of water meter 4's operation and extends its service life. The backflow valve directs the fluid in pipe body 1 to pressure gauge 6 in one direction, preventing backflow and protecting water meter 4 and filter valve 7 from damage caused by backflow impact. This maintains stable pipeline system pressure, preventing pollution or accidents and ensuring the stability of pipeline system operation. Pressure gauge 6 monitors the outlet pressure of the fluid after pressure reduction in pipe body 1 in real time, verifying whether pressure reducing valve 3 is in normal working condition. When the outlet pressure is abnormal, staff can adjust pressure reducing valve 3 or troubleshoot the problem in a timely manner, thereby improving the safety of the pipeline system.

[0041] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A pipeline flow metering system, characterized in that: The device includes a pipe body (1), a ball valve (2), a pressure reducing valve (3), and a water meter (4). The ball valve (2), the pressure reducing valve (3), and the water meter (4) are connected to the pipe body (1) in sequence at intervals. The fluid passes through the ball valve (2) and then through the pressure reducing valve (3) and the water meter (4). The pressure reducing valve (3) automatically adjusts the fluid pressure in the pipe body (1) to the set pressure.

2. The pipeline flow metering system according to claim 1, characterized in that: It also includes a pressure gauge (5), which is connected to the pipe body (1) and is located between the ball valve (2) and the pressure reducing valve (3). The pressure gauge (5) is used to monitor the pressure of the fluid in the pipe body (1).

3. The pipeline flow metering system according to claim 2, characterized in that: It also includes a pressure gauge 2 (6), which is connected to the pipe body (1). The pressure gauge 2 (6) is located on the side of the water meter (4) away from the pressure reducing valve (3). The pressure gauge 2 (6) is used to monitor the pressure of the fluid in the pipe body (1).

4. The pipeline flow metering system according to claim 1, characterized in that: A filter valve (7) is connected inside the pipe body (1). The filter valve (7) is located between the water meter (4) and the pressure reducing valve (3). The filter valve (7) can filter impurities in the fluid inside the pipe body (1).

5. A pipeline flow metering system according to claim 3, characterized in that: The pipe body (1) is connected to a check valve (8), which is located between the water meter (4) and the pressure gauge (6). The check valve (8) supplies fluid in the pipe body (1) to flow to the pressure gauge (6).

6. A pipeline flow metering system according to claim 1, characterized in that: The ball valve (2) includes a valve body (21), a ball (22), a valve stem (23), a rotating ring (24), a valve seat (25), and a handle (26). The valve body (21) has an inlet (211) and an outlet (212) on both sides, both of which are connected to the inner cavity of the valve body (21). The ball (22) is rotatably connected to the inner wall of the valve body (21). The valve seat (25) is connected to the inner wall of the valve body (21), and the surface of the valve seat (25) abuts against the surface of the ball (22) to form a seal. The surface of the ball (22) has an inlet hole (221) that penetrates both sides of the ball (22). One end of the valve stem (23) passes through the surface of the valve body (21) and is connected to the surface of the ball (22). The other end of the valve stem (23) is connected to the surface of the handle (26). The axis of the valve stem (23) and the axis of the inlet hole (221) are perpendicular to each other. The inner wall of the rotating ring (24) is coaxially connected to the outer circumferential surface of the valve body (21) near the outlet (212). The end of the valve body (21) with the outlet (212) is rotatably connected to the inner wall of the pipe body (1). The inner wall of the pipe body (1) is coaxially provided with a rotating cavity (11) for the rotating ring (24) to be embedded. The surface of the rotating ring (24) abuts against the inner wall of the rotating cavity (11) and limits the valve body (21) on the pipe body (1).

7. A pipeline flow metering system according to claim 6, characterized in that: A sealing assembly (9) is connected between the valve body (21) and the pipe body (1). The sealing assembly (9) includes a sealing ring (91). The valve body (21) has a sealing cavity (213) coaxially opened on the outer peripheral surface facing the inner wall of the pipe body (1) for the sealing ring (91) to be embedded. The inner wall of the pipe body (1) has a sealing groove (12) coaxially opened for the sealing ring (91) to be embedded. The inner wall of the sealing cavity (213) and the inner wall of the sealing groove (12) clamp the two sides of the sealing ring (91) to form a seal. The sealing ring (91) is located on the side of the rotating ring (24) away from the pressure reducing valve (3).

8. A pipeline flow metering system according to claim 7, characterized in that: The sealing assembly (9) further includes a limiting ring (92), a slider (93), and multiple limiting strips (95). The limiting ring (92) is coaxially sleeved on the end of the valve body (21) near the inlet (211), and the limiting ring (92) is located on the side of the sealing ring (91) away from the rotating ring (24). The slider (93) is connected to the inner wall of the limiting ring (92). The surface of the valve body (21) is provided with a slide rail (2) for the slider (93) to slide. 14) The sliding direction of the slider (93) is parallel to the axis of the tube body (1). The ends of multiple limiting strips (95) are connected at intervals around the axis of the limiting ring (92) on the surface of the limiting ring (92) facing the tube body (1). Multiple limiting grooves (13) are opened on the surface of the tube body (1) for the ends of the limiting strips (95) to be embedded. The surface of the limiting strips (95) abuts against the inner wall of the limiting grooves (13) and limits the valve body (21) to rotate on the tube body (1).

9. A pipeline flow metering system according to claim 8, characterized in that: The sealing assembly (9) further includes an elastic element (94), one end of which is connected to the inner wall of the slide (214) in the elastic direction, and the other end of which is connected to the surface of the slider (93). The elastic element (94) has the elastic force to drive the slider (93) to slide closer to the tube body (1), and the end of the limiting strip (95) tends to be embedded in the limiting groove (13).

10. A pipeline flow metering system according to claim 9, characterized in that: The sealing groove (12) connects to multiple limiting grooves (13). The end of the limiting strip (95) can pass through the limiting groove (13) and be embedded in the sealing groove (12) and squeeze the sealing ring (91) ring surface. The sealing ring (91) is deformed under pressure. The inner wall of the sealing groove (12) and the inner wall of the sealing cavity (213) abut against both sides of the sealing ring (91) to form a seal.

Images