Negative pressure leak detection device for water meter flow channel

Abstract

The utility model relates to the technical field of water meter detection, especially, a water meter flow passage negative pressure leak detection device, its use will be positioned through positioning frame subassembly to multiple water meters, after the multiple input ends of vacuumizing subassembly are communicated with the second end of multiple water meters respectively, after operating sealing assembly seals the first end of multiple water meters, after starting vacuumizing subassembly through the controller, thereby makes the vacuumizing drilling to the internal vacuumizing operation of multiple water meters, thereby detects the leak point of multiple water meters, improves the detection efficiency, including workbench and controller, workbench front end is provided with the controller, still includes positioning frame subassembly, vacuumizing subassembly and sealing assembly, workbench top end is provided with vacuumizing subassembly, positioning frame subassembly and sealing assembly in proper order, positioning frame subassembly is between vacuumizing subassembly and sealing assembly, and positioning frame subassembly is used for positioning multiple water meters, and sealing assembly is used for sealing the first end of multiple water meters.

Description

Technical Field

[0001] This utility model relates to the technical field of water meter testing, and in particular to a negative pressure leak detection device for water meter flow channels. Background Technology

[0002] Water meter (such as) Figure 7 As a key instrument for measuring water flow (as shown), its sealing performance directly affects the accuracy of measurement and the reliability of long-term use. During the production and factory inspection of water meters, rigorous sealing tests must be performed to prevent problems such as inaccurate measurement or corrosion of internal parts due to leakage.

[0003] Currently, the industry widely adopts positive pressure-based testing methods for water meter sealing. For example, the water meter sealing testing device disclosed in Chinese Utility Model Patent No. CN219714639U involves sealing the water meter's outlet with an inflatable balloon, connecting the inlet to an air pump, and injecting positive pressure gas into the water meter. The entire water meter is then immersed in a water tank, and any air bubbles are observed to determine if there is a leak.

[0004] However, this traditional positive pressure immersion testing method has several inherent drawbacks: The operation is cumbersome and inefficient: the water meter needs to be completely immersed in water during the testing process, and it also needs to be taken out and dried after the test, which adds extra operating steps and time, making it difficult to achieve efficient and automated online testing.

[0005] Risk of contamination and damage: If there is a leak in the internal pipeline of the water meter, water may enter the water meter in reverse under positive pressure, causing damage to precision components or water stains, affecting product quality and service life.

[0006] Limited detection sensitivity: For minute leaks, the bubble method relies on human visual observation, which can easily lead to missed detections due to visual fatigue or indistinct bubbles, making it difficult to guarantee the accuracy and consistency of the detection results.

[0007] Unable to simulate specific operating conditions: In actual use, the pipeline system may experience momentary negative pressure due to water hammer or negative pressure suction. The positive pressure detection method cannot effectively simulate and detect the failure mode of "inward suction" leakage of water meters under negative pressure conditions, which can also pollute water quality or affect metering. Utility Model Content

[0008] To solve the above-mentioned technical problems, this utility model provides a water meter flow channel negative pressure leak detection device.

[0009] This utility model discloses a negative pressure leak detection device for water meter flow channels, comprising a workbench and a controller. The controller is located at the front end of the workbench, which also includes a positioning frame assembly, a vacuuming assembly, and a sealing assembly. The vacuuming assembly, positioning frame assembly, and sealing assembly are sequentially arranged at the top of the workbench. The positioning frame assembly is located between the vacuuming assembly and the sealing assembly. The positioning frame assembly is used to position multiple sets of water meters, the sealing assembly is used to seal the first end of the multiple sets of water meters, and the vacuuming assembly is used to perform a vacuuming operation on the inside of the water meters through the second end of the water meters. In use, multiple sets of water meters are positioned by the positioning frame assembly. Then, the multiple input terminals of the vacuuming assembly are connected to the second end of the multiple sets of water meters. Next, the sealing assembly is operated to seal the first end of the multiple sets of water meters. Then, the vacuuming assembly is activated by the controller, thereby causing the vacuuming drill to perform a vacuuming operation on the inside of the multiple sets of water meters, thus detecting leaks in the multiple sets of water meters and improving detection efficiency.

[0010] Preferably, the positioning frame assembly includes an upright plate, a support plate, and positioning seats. The top of the workbench is provided with multiple sets of upright plates, the top of which are all connected to the bottom of the support plate. The top of the support plate is provided with multiple sets of positioning seats at equal intervals, and each set of positioning seats has a positioning groove inside, which is adapted to the water meter. When the water meter is tested, the water meter is placed in the corresponding positioning groove. The upright plate and the support plate cooperate with each other to provide stable support for the multiple sets of water meters through the positioning seats, thereby improving stability.

[0011] Preferably, the vacuum assembly includes a support rod, a suction pipe, a limiting ring, a sealing ring, an internally threaded cap, a gas collecting pipe, a solenoid valve, a vacuum pump, and a pressure sensor. The bottom end of the gas collecting pipe is fitted with a support rod, which is fixedly mounted on the top of the workbench. Multiple sets of suction pipes are arranged on the outer wall of the gas collecting pipe. Each set of suction pipes has a sealing ring at its input end. An internally threaded cap is movably fitted onto the suction pipe, with the sealing ring inside the cap. A solenoid valve is mounted on the suction pipe. A vacuum pump is mounted on the top of the workbench, with its input end connected to the output end of the gas collecting pipe. A pressure sensor is mounted on the suction pipe. The device is used by placing the water meter into the positioning slot, with the second end of the water meter contacting the sealing ring on the suction pipe. The operator then rotates the internal thread cap, connecting it to the external thread on the second end of the water meter, thus connecting the suction pipe input to the second end of the water meter. Simultaneously, the internal thread cap seals the suction pipe input to the second end of the water meter. The controller starts the vacuum pump, evacuating multiple water meters. The controller also closes multiple solenoid valves. Pressure sensors detect the negative pressure inside each water meter; if a leak is detected, the negative pressure reading on the pressure sensor decreases, improving detection efficiency.

[0012] Preferably, the sealing assembly includes a servo electric cylinder, a moving plate, a vertical plate, and sealing heads. The top of the workbench is provided with a vertical plate, and a servo electric cylinder is provided on the vertical plate. The moving end of the servo electric cylinder is provided with a moving plate, and multiple sets of sealing heads are provided at the end of the moving plate away from the servo electric cylinder. The controller operates the servo electric cylinder to extend, thereby causing the moving plate to drive the multiple sets of sealing heads into the inner side of the first end of the water meter, realizing the sealing of the first end of the water meter by the sealing heads and improving the sealing performance.

[0013] Preferably, it also includes an air inlet pipe and an air inlet valve. The air inlet pipe is provided on the air extraction pipe, and the air inlet valve is installed on the air inlet pipe. After the operator has finished testing the water meter, he opens the air inlet valve, so that outside air enters the water meter through the air inlet pipe, restores the positive pressure state inside the water meter, and allows the sealing head to quickly separate from the first end of the water meter, improving the ease of operation.

[0014] Preferably, the workbench also includes supports, with multiple sets of supports provided at the bottom of the workbench; the multiple sets of supports cooperate with each other to provide stable support for the workbench and improve stability.

[0015] Preferably, it also includes a light bar, which is provided on the moving plate and is slidably connected to the vertical plate; the servo electric cylinder drives the moving plate to move stably under the guidance of the light bar, thereby improving stability.

[0016] Preferably, the sealing head is made of rubber.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows: In use, multiple sets of water meters are positioned by the positioning frame assembly, then the multiple input terminals of the vacuum assembly are connected to the second terminals of the multiple sets of water meters respectively, then the sealing assembly is operated to seal the first terminals of the multiple sets of water meters, and then the vacuum assembly is started by the controller, so that the vacuum drill performs a vacuuming operation on the inside of the multiple sets of water meters, thereby detecting the leaks of the multiple sets of water meters and improving the detection efficiency. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the isometric structure of this utility model; Figure 2 This is an exploded structural diagram of the present invention; Figure 3 This is an enlarged structural diagram of the servo electric cylinder and sealing head, etc. Figure 4 This is an enlarged structural diagram of the positioning base and controller, etc. Figure 5 This is an enlarged structural diagram of a vacuum pump and an internal thread cap, among other components. Figure 6 yes Figure 5 A partially enlarged structural diagram of section A in the middle; Figure 7This is an isometric structural diagram of a water meter.

[0019] The following are labels in the attached diagram: 1. Workbench; 2. Controller; 3. Vertical plate; 4. Support plate; 5. Positioning seat; 6. Support rod; 7. Air extraction pipe; 8. Limiting ring; 9. Sealing ring; 10. Internal threaded cap; 11. Air collection pipe; 12. Solenoid valve; 13. Vacuum pump; 14. Pressure sensor; 15. Servo electric cylinder; 16. Moving plate; 17. Vertical plate; 18. Sealing head; 19. Air inlet pipe; 20. Air inlet valve; 21. Support; 22. Light bar; 23. Water meter. Detailed Implementation

[0020] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. This utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of this utility model more thorough and complete.

[0021] Example 1 like Figures 1 to 6 As shown, a water meter flow channel negative pressure leak detection device of the present invention includes a workbench 1 and a controller 2. The controller 2 is provided at the front end of the workbench 1. The workbench 1 also includes a positioning frame assembly, a vacuuming assembly and a sealing assembly. The vacuuming assembly, the positioning frame assembly and the sealing assembly are arranged sequentially at the top of the workbench 1. The positioning frame assembly is located between the vacuuming assembly and the sealing assembly. The positioning frame assembly is used to position multiple sets of water meters 23. The sealing assembly is used to seal the first end of multiple sets of water meters 23. The vacuuming assembly is used to perform a vacuuming operation on the inside of the water meter 23 through the second end of the water meter 23. like Figure 2 and Figure 4 As shown, the positioning frame assembly includes an upright plate 3, a support plate 4, and a positioning seat 5. The top of the workbench 1 is provided with multiple sets of upright plates 3, and the top of each set of upright plates 3 is connected to the bottom of the support plate 4. Multiple sets of positioning seats 5 are provided at equal intervals on the top of the support plate 4. The multiple sets of positioning seats 5 are provided with positioning grooves inside, and the positioning grooves are adapted to the water meter 23. like Figure 2 , Figure 5 and Figure 6As shown, the vacuum assembly includes a support rod 6, a suction pipe 7, a limiting ring 8, a sealing ring 9, an internal thread cap 10, a gas collecting pipe 11, a solenoid valve 12, a vacuum pump 13, and a pressure sensor 14. The bottom end of the gas collecting pipe 11 is provided with the support rod 6, which is fixedly installed on the top of the workbench 1. Multiple sets of suction pipes 7 are provided on the outer wall of the gas collecting pipe 11. Each set of suction pipes 7 has a sealing ring 9 at its input end. The outer wall of the suction pipe 7 is provided with a sealing ring 9. An internal thread cap 10 is movably fitted on the suction pipe 7, with the sealing ring 9 inside the internal thread cap 10. A solenoid valve 12 is provided on the suction pipe 7. A vacuum pump 13 is provided on the top of the workbench 1. The input end of the vacuum pump 13 is connected to the output end of the gas collecting pipe 11. A pressure sensor 14 is provided on the suction pipe 7.

[0022] In this embodiment, when testing the water meter 23, the water meter 23 is placed in the corresponding positioning slot. The upright plate 3 and the support plate 4 cooperate with each other to stably support multiple sets of water meters 23 through the positioning seat 5. The second end of the water meter 23 abuts against the sealing ring 9 on the air extraction pipe 7. Then, the operator rotates the internal thread cap 10, so that the internal thread cap 10 is threadedly connected to the external thread of the second end of the water meter 23, thereby realizing the connection between the input end of the air extraction pipe 7 and the second end of the water meter 23. At the same time, the internal thread cap 10 seals the input end of the air extraction pipe 7 and the second end of the water meter 23. The sealing component is operated to seal the first end of the water meter 23. The vacuum pump 13 is started by the controller 2 to perform a vacuum operation inside multiple sets of water meters 23. Multiple sets of solenoid valves 12 are closed by the controller 2. The pressure sensor 14 detects the negative pressure inside each set of water meters 23. If there is a leak in the water meter 23, the pressure sensor 14 will detect it in real time.

[0023] Example 2 like Figures 1 to 6 As shown, a water meter flow channel negative pressure leak detection device of the present invention includes a workbench 1 and a controller 2. The controller 2 is provided at the front end of the workbench 1. The workbench 1 also includes a positioning frame assembly, a vacuuming assembly and a sealing assembly. The vacuuming assembly, the positioning frame assembly and the sealing assembly are arranged sequentially at the top of the workbench 1. The positioning frame assembly is located between the vacuuming assembly and the sealing assembly. The positioning frame assembly is used to position multiple sets of water meters 23. The sealing assembly is used to seal the first end of multiple sets of water meters 23. The vacuuming assembly is used to perform a vacuuming operation on the inside of the water meter 23 through the second end of the water meter 23. like Figure 2 and Figure 4 As shown, the positioning frame assembly includes an upright plate 3, a support plate 4, and a positioning seat 5. The top of the workbench 1 is provided with multiple sets of upright plates 3, and the top of each set of upright plates 3 is connected to the bottom of the support plate 4. Multiple sets of positioning seats 5 are provided at equal intervals on the top of the support plate 4. The multiple sets of positioning seats 5 are provided with positioning grooves inside, and the positioning grooves are adapted to the water meter 23. like Figure 2 , Figure 5 and Figure 6 As shown, the vacuum assembly includes a support rod 6, a suction pipe 7, a limiting ring 8, a sealing ring 9, an internal thread cap 10, a gas collecting pipe 11, a solenoid valve 12, a vacuum pump 13, and a pressure sensor 14. The bottom end of the gas collecting pipe 11 is provided with a support rod 6, which is fixedly installed on the top of the workbench 1. Multiple sets of suction pipes 7 are provided on the outer wall of the gas collecting pipe 11. Each set of suction pipes 7 has a sealing ring 9 at its input end. The outer wall of the suction pipe 7 is provided with a sealing ring 9. An internal thread cap 10 is movably fitted on the suction pipe 7, with the sealing ring 9 inside the internal thread cap 10. A solenoid valve 12 is provided on the suction pipe 7. A vacuum pump 13 is provided on the top of the workbench 1. The input end of the vacuum pump 13 is connected to the output end of the gas collecting pipe 11. A pressure sensor 14 is provided on the suction pipe 7. like Figure 3 As shown, the sealing assembly includes a servo electric cylinder 15, a moving plate 16, a vertical plate 17, and a sealing head 18. The top of the workbench 1 is provided with a vertical plate 17, and the servo electric cylinder 15 is provided on the vertical plate 17. The moving end of the servo electric cylinder 15 is provided with a moving plate 16, and multiple sets of sealing heads 18 are provided at the end of the moving plate 16 away from the servo electric cylinder 15. It also includes an air intake pipe 19, an air intake valve 20, a support 21, and a light bar 22. The air intake pipe 19 is provided on the air extraction pipe 7, and the air intake valve 20 is installed on the air intake pipe 19. Multiple sets of supports 21 are provided at the bottom of the workbench 1. The light bar 22 is provided on the movable plate 16 and is slidably connected to the vertical plate 17. The sealing head 18 is made of rubber.

[0024] In this embodiment, when testing the water meter 23, the water meter 23 is placed in the corresponding positioning slot. The upright plate 3 and the support plate 4 cooperate with each other to stably support multiple sets of water meters 23 through the positioning seat 5. The second end of the water meter 23 abuts against the sealing ring 9 on the air extraction pipe 7. Then, the operator rotates the internal thread cap 10, so that the internal thread cap 10 is threadedly connected to the external thread of the second end of the water meter 23, thereby realizing the connection between the input end of the air extraction pipe 7 and the second end of the water meter 23. At the same time, the internal thread cap 10 seals the input end of the air extraction pipe 7 and the second end of the water meter 23. The controller 2 operates the servo electric cylinder 15 to extend, so that the moving plate 16 drives multiple sets of water meters 23. The sealing head 18 enters the inner side of the first end of the water meter 23, thereby sealing the first end of the water meter 23. The vacuum pump 13 is started by the controller 2 to perform a vacuum operation inside multiple sets of water meters 23. The controller 2 closes multiple sets of solenoid valves 12. The pressure sensor 14 detects the negative pressure inside each set of water meters 23. If there is a leak in the water meter 23, the pressure sensor 14 will detect it in real time. After the staff has finished inspecting the water meter 23, the air inlet valve 20 is opened, so that outside air enters the water meter 23 through the air inlet pipe 19, so that the water meter 23 is restored to a positive pressure state, and the sealing head 18 is quickly separated from the first end of the water meter 23.

[0025] The controller 2, solenoid valve 12, vacuum pump 13, pressure sensor 14, and servo electric cylinder 15 of the water meter flow channel negative pressure leak detection device of this utility model are commercially available. Technical personnel in this industry only need to install and operate them according to the accompanying instruction manual, without requiring any creative work from those skilled in the art.

[0026] The above description is only a preferred embodiment of the present 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 the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A water meter flow channel negative pressure leak detection device, comprising a workbench (1) and a controller (2), wherein the controller (2) is provided at the front end of the workbench (1), characterized in that, It also includes a positioning frame assembly, a vacuuming assembly and a sealing assembly. The top of the workbench (1) is provided with a vacuuming assembly, a positioning frame assembly and a sealing assembly in sequence. The positioning frame assembly is located between the vacuuming assembly and the sealing assembly. The positioning frame assembly is used to position multiple sets of water meters (23). The sealing assembly is used to seal the first end of multiple sets of water meters (23). The vacuuming assembly is used to perform a vacuuming operation on the inside of the water meter (23) through the second end of the water meter (23).

2. The water meter flow channel negative pressure leak detection device as described in claim 1, characterized in that, The positioning frame assembly includes a vertical plate (3), a support plate (4), and a positioning seat (5). The top of the workbench (1) is provided with multiple sets of vertical plates (3), and the top of each set of vertical plates (3) is connected to the bottom of the support plate (4). The top of the support plate (4) is provided with multiple sets of positioning seats (5) at equal intervals. The positioning seats (5) are provided with positioning grooves inside, and the positioning grooves are adapted to the water meter (23).

3. The water meter flow channel negative pressure leak detection device as described in claim 1, characterized in that, The vacuum assembly includes a support rod (6), a suction pipe (7), a limiting ring (8), a sealing ring (9), an internal thread cap (10), a gas collecting pipe (11), a solenoid valve (12), a vacuum pump (13), and a pressure sensor (14). The bottom end of the gas collecting pipe (11) is provided with a support rod (6), which is fixedly installed on the top of the workbench (1). Multiple sets of suction pipes (7) are provided on the outer side wall of the gas collecting pipe (11). Each set of suction pipes (7) has a sealing ring (9) at its input end. The outer side wall of the suction pipe (7) is provided with a sealing ring (9). An internal thread cap (10) is movably fitted on the suction pipe (7). The sealing ring (9) is inside the internal thread cap (10). A solenoid valve (12) is provided on the suction pipe (7). A vacuum pump (13) is provided on the top of the workbench (1). The input end of the vacuum pump (13) is connected to the output end of the gas collecting pipe (11). A pressure sensor (14) is provided on the suction pipe (7).

4. A negative pressure leak detection device for a water meter flow passage as defined in claim 1 wherein, The sealing assembly includes a servo electric cylinder (15), a moving plate (16), a vertical plate (17), and a sealing head (18). The top of the worktable (1) is provided with a vertical plate (17), and a servo electric cylinder (15) is provided on the vertical plate (17). The moving end of the servo electric cylinder (15) is provided with a moving plate (16), and multiple sets of sealing heads (18) are provided at the end of the moving plate (16) away from the servo electric cylinder (15).

5. The water meter flow channel negative pressure leak detection device as described in claim 3, characterized in that, It also includes an air intake pipe (19) and an air intake valve (20). The air intake pipe (7) is provided with an air intake pipe (19), and the air intake pipe (19) is equipped with an air intake valve (20).

6. The water meter flow channel negative pressure leak detection device as described in claim 1, characterized in that, It also includes supports (21), and multiple sets of supports (21) are provided at the bottom of the workbench (1).

7. A negative pressure leak detection device for a water meter flow passage as defined in claim 4 wherein, It also includes a light bar (22), which is provided on the movable plate (16) and is slidably connected to the vertical plate (17).

8. A negative pressure leak detection device for a water meter flow passage as defined in claim 4 wherein, The sealing head (18) is made of rubber.

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