Multi-pipeline automatic water feeding, water discharging and air exhausting device

Abstract

The utility model provides a multi-pipeline automatic water feeding, water discharging and air exhausting device which comprises a plurality of water inlet valves connected to a water outlet pipe of a water supply pump in parallel, a plurality of water outlet valves connected to a water return pipe of a water tank in parallel, and pipelines to be tested which are connected with the water inlet valves and the water outlet valves in a one-to-one correspondence mode. One end, connected with the to-be-tested pipeline, of each water inlet valve is communicated with a water feeding and discharging unit, one end, connected with the to-be-tested pipeline, of each water outlet valve is communicated with an exhaust unit, each water feeding and discharging unit is connected to a water feeding / discharging pipeline connected with a water tank in parallel, and each exhaust unit is connected to an exhaust pipeline connected with the water tank in parallel. A water feeding pump used for feeding water to the water feeding and discharging units and a water discharging pump used for discharging water to the water feeding and discharging units are connected to the water feeding / discharging pipeline in parallel. According to the utility model, the verification period of multiple pipelines is saved, the operation time of the water supply pump is shortened, the production cost caused by refrigeration is reduced, and the accuracy of metering is ensured not to be interfered by bubbles in the to-be-tested pipeline.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline meter calibration, in particular to a multi-pipeline automatic water supply, drainage and exhaust device. Background Art

[0002] When testing large-diameter pipeline water meters, heat meters, flow meters and other meters to be tested, the pipeline to be tested with the above-mentioned meters installed is usually connected to a detection loop consisting of a water tank, a water supply pump, a water inlet valve, a water outlet valve and corresponding pipelines; during the test, it is necessary to start the water supply pump and the water inlet valve and water outlet valve at both ends of the pipeline to be tested in turn, and enter the calibration process after the pipeline to be tested is filled with water and exhausted.

[0003] Due to the large diameter of the pipeline to be tested, it takes a long time for the water flow to exhaust the entire pipeline. In addition, for some meters under test with flat cavity plates welded inside the meter body, the gap between the meter body and the flat cavity plate increases the time required for exhaust. Especially when calibrating multiple types of meters under test, it is necessary to perform exhaust calibration on the pipelines under test where each type of meter under test is located, resulting in a long operation cycle and low calibration efficiency. In addition, since the water supply pump matched with the large-diameter pipeline detection is a high-power water pump with a fast flow rate, the water flow rubs against the pipe wall during the exhaust process, causing the water temperature to rise. In order to ensure the accuracy of the calibration data, it is necessary to add an additional refrigeration device to the water tank, resulting in an increase in production costs. In addition, when the water in the large flow is directly discharged into the water tank, it is very easy to cause bubbles, and the water containing bubbles will always circulate in the pipeline to be tested. The meters under test mostly use the ultrasonic detection principle, which is very easy to cause deviations in the measurement data. Utility Model Content

[0004] In order to solve the deficiencies of the above-mentioned prior art, the utility model provides a multi-pipeline automatic water supply, drainage and exhaust device, which saves the calibration cycle of multiple pipelines, compresses the operating time of the water supply pump, reduces the production cost caused by refrigeration, and ensures that there are no bubbles in the pipeline to be tested to interfere with the accuracy of measurement.

[0005] The technical solution of the utility model is: a multi-pipe automatic water supply, drainage and exhaust device, comprising a plurality of water inlet valves connected in parallel to the outlet pipe of a water supply pump, a plurality of water outlet valves connected in parallel to the return pipe of a water tank, and pipelines to be tested that are connected to each water inlet valve and each water outlet valve in a one-to-one correspondence, one end of each water inlet valve connected to the pipeline to be tested is connected to a water supply and drainage unit, one end of each water outlet valve connected to the pipeline to be tested is connected to an exhaust unit, each water supply and drainage unit is connected in parallel to a water supply / drainage pipeline connected to a water tank, each exhaust unit is connected in parallel to an exhaust pipeline connected to a water tank, and a water supply pump for supplying water to each water supply and drainage unit and a drainage pump for draining water from each water supply and drainage unit are connected in parallel to the water supply / drainage pipeline. By connecting a plurality of pipelines to be tested in parallel to a detection circuit, and arranging a water supply and drainage unit and an exhaust unit at both ends of the pipeline to be tested, the exhaust operation and the calibration operation of each pipeline to be tested are independent of each other, thereby saving the calibration cycle of multiple pipelines.

[0006] The water supply pump and the drainage pump are end-suction pumps. A low-power end-suction pump is used to independently exhaust the pipeline to be tested, shorten the running time of the water supply pump, minimize the running time of large-flow water supply, and effectively avoid the increase of water temperature and the existence of bubbles in the pipeline to be tested.

[0007] The water supply and drainage unit is a pneumatic ball valve, and the water outlet of the water supply pump and the water inlet of the drainage pump are connected in parallel to the water supply / drainage pipeline via a main water supply valve and a main drainage valve respectively.

[0008] The exhaust unit includes a first exhaust valve and a second exhaust valve arranged in series, and the end of the exhaust pipeline extends to the opening at the top of the water tank. Compared with the design of a single exhaust valve, the exhaust unit composed of double exhaust valves avoids wear and leakage caused by frequent starting and stopping, thereby ensuring the sealing of the exhaust end of each pipeline to be tested.

[0009] The water inlet valve is detachably connected to the pipeline to be tested via a tube clamp, and the water supply and drainage unit is installed on the pipe body connecting the water inlet valve and the tube clamp. The design of the tube clamp improves the convenience of installing the pipeline to be tested on the circuit and improves the verification efficiency.

[0010] The return pipe is located on the side away from the water outlet of the water tank, and the end of the return pipe extends to the bottom of the water tank and has a raised pipe section higher than the water outlet valve. The design of the return pipe and its end can avoid the formation of bubbles in the water tank during the calibration process, thereby ensuring the accuracy of the calibration; the design of the raised pipe section can ensure that the highest point of the return pipe to the water outlet valve is always in a bubble-free state after the first water filling and exhaust, thereby reducing the subsequent exhaust time.

[0011] The beneficial effects of the utility model are as follows: by connecting multiple pipelines to be tested in parallel to the detection circuit, and arranging water supply and drainage units and exhaust units at both ends of the pipelines to be tested, the exhaust operation and calibration operation of each pipeline to be tested are independent of each other, thereby saving the calibration cycle of multiple pipelines; at the same time, a low-power end-suction pump is used to independently exhaust the pipelines to be tested, shortening the operating time of the water supply pump, minimizing the operating time of large-flow water supply, and effectively avoiding the increase of water temperature and the presence of bubbles in the pipelines to be tested. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the utility model.

[0013] Figure numerals: 1, water tank; 2, water supply pump; 3, water outlet pipe; 4, return pipe; 401, lift pipe section; 402, pipeline sight glass; 5, water inlet valve; 6, water outlet valve; 7, pipeline to be tested; 701, inspected meter; 8, water supply / drainage pipeline; 801, water supply branch; 802, drainage branch; 9, pneumatic ball valve; 901, branch water supply valve; 902, branch drainage valve; 10, first exhaust valve; 11, second exhaust valve; 12, exhaust pipeline; 13, water supply pump; 14, drainage pump; 15, main water supply valve; 16, main drainage valve; 17, pipe clamp. DETAILED DESCRIPTION

[0014] In order to enable those skilled in the art to better understand the technical solution in the utility model, the technical solution in the utility model is clearly and completely described below in conjunction with the accompanying drawings. Other embodiments obtained by those skilled in the art without making any creative work should all fall within the protection scope of the utility model.

[0015] like Figure 1 As shown, the utility model provides a multi-pipe automatic water supply, drainage and exhaust device, including a water tank 1, a water supply pump 2, a water outlet pipe 3, a water return pipe 4, a water inlet valve 5, a water outlet valve 6 and a pipeline 7 to be tested with a test meter 701 installed, wherein the connection method between the water tank 1, the water supply pump 2 and the water outlet pipe 3 is the same as that of the prior art, that is, the water outlet pipe 3 is connected to the water outlet of the water tank 1, the water supply pump 2 is installed on the water outlet pipe 3, and in order to avoid the water flow entering the water tank 1 through the return pipe 4, the water return pipe 4 is connected to the return pipe 4, and the return pipe 4 is connected to the return pipe 4. The influence of the water outlet of the water tank 1, the return pipe 4 is located at the side away from the water outlet of the water tank 1 and the end of the return pipe 4 extends to the bottom of the water tank 1; there are multiple water inlet valves 5 and water outlet valves 6, which are respectively connected in parallel to the water outlet pipe 3 of the water supply pump 2 and the return pipe 4 of the water tank 1, and the number of the pipelines 7 to be tested is the same as the number of the water inlet valves 5 and the water outlet valves 6, and the water inlet end and the water outlet end of each pipeline 7 to be tested are respectively connected to each water inlet valve 5 and each water outlet valve 6 in a one-to-one correspondence to form a detection circuit, such as Figure 1As shown, a plurality of the same type of meters 701 to be tested can be installed in series on the same pipeline 7 to be tested, and the types of meters 701 to be tested on different pipelines 7 to be tested are different. In the present embodiment, there are four pipelines 7 to be tested, namely, pipeline A, pipeline B, pipeline C, and pipeline D. In other embodiments, the number of pipelines 7 to be tested can be increased as needed. The end of each water inlet valve 5 connected to the pipeline 7 to be tested is connected to a water supply and drainage unit, and the end of each water outlet valve 6 connected to the pipeline 7 to be tested is connected to an exhaust unit. Each water supply and drainage unit is connected in parallel to a water supply / drainage pipeline 8 connected to a water tank 1, and each exhaust unit is connected in parallel to an exhaust pipeline 12 connected to the water tank 1. A water supply pump 13 for supplying water to each water supply and drainage unit and a drainage pump 14 for draining water from each water supply and drainage unit are connected in parallel to the water supply / drainage pipeline 8. By connecting multiple pipelines 7 to be tested in parallel to the detection circuit, and providing a water supply and drainage unit and an exhaust unit at both ends of the pipelines 7 to be tested, the exhaust operation and the calibration operation of each pipeline 7 to be tested are independent of each other, that is, when the exhaust of pipeline A is completed for the calibration operation, the subsequent pipelines B / C / D can be exhausted, and when the calibration process of pipeline A is completed for drainage and meter removal, the subsequent pipelines B / C / D can be calibrated, thereby saving the testing time of multiple groups of tested meters 701 in multiple pipelines and improving the calibration efficiency.

[0016] Further preferably, the water supply pump 13 and the drainage pump 14 are end suction pumps. Compared with the large flow water supply pump 2 used in the device, the end suction pump has low power, and the corresponding pump has much smaller head and flow. When exhausting, compared with the prior art, the water flow is slowly filled in the pipeline to be tested, rather than a large flow impacting the pipeline, and the corresponding exhaust efficiency is effectively improved. The presence of bubbles in the pipeline 7 to be tested interferes with the test results, and the water flow rate is slow during the exhaust process, and the friction between the water flow and the pipe wall hardly generates heat, so that only in the test process, there is a large flow of water supply, which can effectively reduce the increase in water temperature, thereby reducing the production cost caused by refrigeration.

[0017] like Figure 1 As shown, the water supply and drainage unit is a pneumatic ball valve 9, and the water outlet end of the water supply pump 13 and the water inlet end of the drainage pump 14 are respectively connected in parallel to the water supply / drainage pipeline 8 via the main water supply valve 15 and the main drainage valve 16; the water inlet end of the water supply pump 13 is connected to the side wall of the water tank 1 via a pipeline, and the water outlet end of the drainage pump 14 extends to the upper opening of the water tank 1 via a pipeline. Preferably, the water inlet end pipeline of the water supply pump 13 is arranged close to the water outlet of the water tank 1, and the water outlet end pipeline of the drainage pump 14 is located in the middle of the water tank 1 or away from the water outlet of the water tank 1, so as to reduce the influence of the drainage pump 14 on the water inlet of the water supply pump 2 when draining water.

[0018] Further preferably, the exhaust unit comprises a first exhaust valve 10 and a second exhaust valve 11 arranged in series, and the end of the exhaust pipeline 12 extends to the opening at the top of the water tank 1. The exhaust unit composed of two exhaust valves adopts a one-in-use and one-in-standby working mode, that is, the first exhaust valve 10 is normally open, and the second exhaust valve 11 switches on and off. After a certain period of operation, the second exhaust valve 11 is normally open, and the first exhaust valve 10 switches on and off; thereby avoiding the wear and leakage caused by frequent start and stop of a single valve, and ensuring the sealing of the exhaust end of each pipeline 7 to be tested.

[0019] The water inlet valve 5 is detachably connected to the pipeline 7 to be tested via a tube clamp 17, and the water supply and drainage unit is installed on the pipe body connecting the water inlet valve 5 and the tube clamp 17. The design of the tube clamp 17 improves the convenience of installing the pipeline 7 to be tested on the circuit and improves the verification efficiency.

[0020] In order to ensure that the area from the highest point of the return pipe 4 to the outlet valve 6 is always in a bubble-free state since the first water filling and exhaust, thereby shortening the exhaust time for subsequent pipeline inspection, the return pipe 4 is provided with a raised pipe section 401 higher than the outlet valve 6. A pipeline sight glass 402 is installed on the raised pipe section 401 to facilitate observation of the exhaust condition of the entire detection circuit.

[0021] The device also includes a controller, which is a PLC controller. The water supply pump 2, the water inlet valve 5, the water outlet valve 6, the pipe clamp 17, the water supply pump 13, the drainage pump 14, the pneumatic ball valve 9, the main water supply valve 15, the main drainage valve 16, the first exhaust valve 10 and the second exhaust valve 11 are electrically connected to the PLC controller. The PLC controller is a prior art and is not described in detail here. The above-mentioned valves and pump bodies are automatically or manually switched by the PLC controller to complete the exhaust operation, drainage operation and calibration operation of each pipeline 7 to be tested.

[0022] When implementing the technical solution, a spare pipe is used to connect any corresponding water inlet valve 5 and water outlet valve 6, and the initial water filling and exhaust of the detection circuit is performed. When no bubbles are observed in the pipeline through the pipeline sight glass 402, the water inlet valve 5, the water outlet valve 6 and the water supply pump 2 are closed, and the first exhaust valve 10, the second exhaust valve 11, the pneumatic ball valve 9, the main drain valve 16 and the drain pump 14 corresponding to the spare pipe are opened to drain the spare pipe. After the drainage is completed, the spare pipe is removed. At this time, the outlet pipe 3 between the water tank 1 and the water inlet valve 5 and the return pipe 4 between the highest point of the raised pipe section 401 and the water outlet valve 6 are The four pipelines 7 to be tested, ABCD, with the meters 701 to be tested installed, are placed between the corresponding water inlet valves 5 and water outlet valves 6. The outlet end of the pipeline 7 to be tested is connected to the water outlet valve 6. The inlet end of the pipeline 7 to be tested is connected to the water inlet valve 5 through the pipe clamp 17. Each connection is detachably connected by flanges. The A pipeline is vented. The first exhaust valve 10, the second exhaust valve 11, the pneumatic ball valve 9, the main water supply valve 15 and the water supply pump 13 corresponding to the A pipeline are opened. The water supply pump 13 with a small flow and a small lift drives the water flow to slowly fill the A pipeline. When there is water flow at the end of the exhaust pipeline 12, The A pipeline has been exhausted. At this time, close the first exhaust valve 10, the second exhaust valve 11, the pneumatic ball valve 9, the main water supply valve 15 and the water supply pump 13 corresponding to the A pipeline, open the water inlet valve 5, the water outlet valve 6 and the water supply pump 2 corresponding to the A pipeline, and test each meter 701 in the A pipeline; at the same time, open the first exhaust valve 10, the second exhaust valve 11, the pneumatic ball valve 9, the main water supply valve 15 and the water supply pump 13 corresponding to the B pipeline to exhaust the B pipeline, repeat the above operation, and complete the exhaust of the CD pipeline; after the A pipeline test, close the water inlet valve 5 and The outlet valve 6 opens the water inlet valve 5 and the outlet valve 6 corresponding to the B pipeline to perform the calibration operation of the B pipeline. At the same time, the first exhaust valve 10, the second exhaust valve 11, the pneumatic ball valve 9, the main drain valve 16 and the drain pump 14 corresponding to the A pipeline are opened to drain the A pipeline. After the calibration of the B pipeline is completed, according to the above operation, the C pipeline is calibrated and the B pipeline is drained at the same time. The whole operation process shortens the test time, and the end suction pump with small flow and small lift replaces the water supply pump 2 for exhaust. The water temperature remains basically unchanged, and there are no bubbles in the pipeline 7 to be tested, which ensures the accuracy of the measurement.

Claims

1. Multi-pipe automatic water supply, drainage and exhaust device, characterized in that: It includes a plurality of water inlet valves connected in parallel to the water outlet pipe of a water supply pump, a plurality of water outlet valves connected in parallel to the water return pipe of a water tank, and pipelines to be tested that are respectively connected to the water inlet valves and the water outlet valves in a one-to-one correspondence, wherein one end of each water inlet valve connected to the pipeline to be tested is connected to a water supply and drainage unit, one end of each water outlet valve connected to the pipeline to be tested is connected to an exhaust unit, each water supply and drainage unit is connected in parallel to a water supply / drainage pipeline connected to the water tank, each exhaust unit is connected in parallel to an exhaust pipeline connected to the water tank, and a water supply pump for supplying water to each water supply and drainage unit and a drainage pump for draining water from each water supply and drainage unit are connected in parallel to the water supply / drainage pipeline.

2. The multi-pipe automatic water supply, drainage and exhaust device according to claim 1 is characterized in that: The water supply pump and the drainage pump are end suction pumps.

3. The multi-pipe automatic water supply, drainage and exhaust device according to claim 1 or 2, characterized in that: The water supply and drainage unit is a pneumatic ball valve, and the water outlet of the water supply pump and the water inlet of the drainage pump are connected in parallel to the water supply / drainage pipeline via a main water supply valve and a main drainage valve respectively.

4. The multi-pipe automatic water supply, drainage and exhaust device according to claim 1 or 2, characterized in that: The exhaust unit comprises a first exhaust valve and a second exhaust valve which are arranged in series, and the end of the exhaust pipeline extends to the opening at the top of the water tank.

5. The multi-pipe automatic water supply, drainage and exhaust device according to claim 1 or 2, characterized in that: The water inlet valve is detachably connected to the pipeline to be tested via a tube clamp, and the water supply and drainage unit is installed on a pipe body connecting the water inlet valve and the tube clamp.

6. The multi-pipe automatic water supply, drainage and exhaust device according to claim 1 or 2, characterized in that: The return water pipe is located at a side away from the water outlet of the water tank, the end of the return water pipe extends to the bottom of the water tank and the return water pipe has a raised pipe section higher than the position of the water outlet valve.

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