A water circulation device for pressure testing of municipal water pipes and its usage method

Abstract

The present application relates to a water circulation device for pressure testing of municipal water pipes and a method for using the same. The water circulation device includes a circulation component for connecting to a pipeline and a pressure supplement device for supplementing pressure in the pipeline. The circulation component is provided with a water inlet end and a water outlet end that can be respectively communicated with the pipeline. Both the water inlet end and the water outlet end can be closed. There is at least one water outlet end, and a one-way valve for blocking the test pressure water from flowing into the circulation component is installed on the water outlet end. The present application has the effect of improving the recycling rate of the test pressure water and reducing the waste of water resources.

Description

Technical Field

[0001] The present application relates to the field of municipal water pipe testing, and in particular to a water circulation device for municipal water pipe pressure testing and a method of using the same. Background Art

[0002] Water supply pipeline pressure test is an indispensable part of pressure pipeline engineering. Municipal water supply pipeline pressure test usually adopts water pressure test. Before the water pressure test, the water source connection and drainage plan should be prepared.

[0003] At the top of the upstream of the pipeline test section and the high point of the middle section of the pipeline, there are exhaust valves for exhausting the gas inside the pipeline. A pressure gauge for displaying the internal pressure of the pipeline is also installed on the downstream end of the pipeline.

[0004] After completing the water pressure test on the water supply pipe, the water in the pipe will be drained.

[0005] With respect to the above-mentioned related technologies, the inventors believe that since the capacity of the pipeline test section is relatively large, the water after the test is directly discharged, which has the defect of seriously wasting water resources. Summary of the invention

[0006] In order to improve the problem of water resource waste caused by water pipe pressure testing, the present application provides a water circulation device for municipal water pipe pressure testing and a method of using the same.

[0007] In the first aspect, the present application provides a water circulation device for municipal water pipe pressure testing, which adopts the following technical solution:

[0008] A water circulation device for municipal water pipe pressure testing comprises a circulation component for connecting to the pipeline and a pressure supplementing device for supplementing the pressure in the pipeline. The circulation component is provided with a water inlet and a water outlet which can be respectively connected to the pipeline. Both the water inlet and the water outlet can be closed. At least one water outlet is provided. A one-way valve is installed on the water outlet to cut off the flow of pressure test water to the circulation component.

[0009] By adopting the above technical solution, the circulation component with at least one water outlet can connect at least two pipes at the same time, so that the water in the pipe that has completed the pressure test can be circulated and pumped into the empty pipe to be tested, so that the pressure test water can be recycled, the utilization rate of the pressure test water is improved, and the waste of the pressure test water is greatly reduced. The next pipe is pressurized by the pressure compensation device, so that the inside of the second pipe reaches the rated pressure value of the pressure test, and then the second pipe can be pressure tested.

[0010] Preferably, the circulation component includes a circulation pump, a first water pipe and a second water pipe respectively connected to the water inlet end and the water outlet end of the circulation pump. The end of the water pipe far from the circulation pump can be connected to a pipeline. A first ball valve is installed on the first water pipe, a second ball valve is installed on the second water pipe, and the one-way valve is located between the second ball valve and the circulation pump.

[0011] By adopting the above technical solution, by using the first water pipe and the second water pipe, it is convenient to connect the water circulation device to the pipeline. The first ball valve and the second ball valve can relatively stably block the two water pipes, so as to ensure that the pipeline will not be affected by the water circulation device during the pressure test.

[0012] Preferably, a third water pipe connecting the two is installed between the first water pipe and the second water pipe, and a third ball valve is installed on the third water pipe.

[0013] By adopting the above technical solution, after opening the exhaust component of the second pipeline and opening the third ball valve, the third water pipe connects the first water pipe and the second water pipe, so that the first pipeline and the second pipeline form a communicating vessel, so that part of the pressure test water in the first pipeline can automatically circulate into the second pipeline, reducing the use of the circulation pump. The design is reasonable, saving electric energy and effectively extending the service life of the circulation pump.

[0014] Preferably, a flow switch is installed on the water inlet end of the circulation pump.

[0015] By adopting the above technical solution, the flow value is preset for the flow switch according to the capacity of the pipeline for which the pressure test is completed. When the circulation pump is about to finish pumping the pressure test water, the flow switch cuts off the power supply to the circulation pump, so as to avoid the no-load operation of the circulation pump.

[0016] Preferably, the output end of the pressure supplement device is connected to the first water pipe, and a fourth ball valve is also installed on the first water pipe, and the fourth ball valve is located between the pressure supplement device and the circulation pump.

[0017] By adopting the above technical solution, the pressure supplement device can supplement the pressure of the two pipelines through the first water pipe and the second water pipe respectively. In addition, after the pressure supplement device is connected to the first water pipe, the water circulation device is more integrated and convenient to use.

[0018] Preferably, it further includes a water tank respectively connected to the water inlet end of the circulation component and the pressure supplement device. A fourth water pipe with one end communicating with the water tank is installed on the water tank, the other end of the fourth water pipe is connected to the water inlet end of the circulation component, and a fifth ball valve is installed on the fourth water pipe, and the fifth ball valve is located between the flow switch and the water tank.

[0019] By adopting the above technical solution, when the fifth ball valve is opened, the water in the water tank flows through the fourth water pipe to the circulation pump, so that the pipeline to be tested can be filled with water, so that the pressure required for the test can be achieved in the pipeline to be tested. Using the water tank for water filling is more convenient than using an external water source.

[0020] Preferably, it further includes a filter connected between the flow switch and the fifth ball valve.

[0021] By adopting the above technical solution, the water in the water tank can be filtered and then flow to the circulation pump, which can protect the circulation pump and extend the service life of the circulation pump.

[0022] Preferably, the filter is located between the flow switch and the fourth ball valve.

[0023] By adopting the above technical solution, the filter can filter the pressure test water pumped out from the first pipeline, effectively preventing the sundries contained in the first pipeline from circulating to the circulation pump together with the pressure test water, thereby reducing the loss of the circulation pump.

[0024] Preferably, a pressure gauge is installed on the first water pipe, and the pressure gauge is located between the fourth ball valve and the pressure compensation device.

[0025] By adopting the above technical solution, after the water circulation device is installed on two pipelines, on the premise of recycling the pressure test water, when the pipeline reaches the test standard, connecting the corresponding water pipe and the pipeline can directly reflect the pressure value of the corresponding test water pipe, which is more convenient to use.

[0026] In a second aspect, the present application provides a method for using a water circulation device:

[0027] Step 1: A pressure gauge is connected to the downstream end of the first pipeline. Connect the first water pipe to the downstream end of the first pipeline that has completed the test. Then close the fourth ball valve and the fifth ball valve, and then open the first ball valve, the second ball valve, the third ball valve, and the exhaust components at the upstream ends of the first pipeline and the second pipeline to be filled with water.

[0028] Step 2: When the pressure test water in the first pipeline no longer automatically flows to the second pipeline, close the third ball valve, open the fourth ball valve, and turn on the circulation pump.

[0029] Step 3: When the circulation pump no longer pumps out the pressure test water from the first pipeline, close the first ball valve, open the fifth ball valve, and turn on the pressure compensation device.

[0030] Step 4: When the pressure test water flows out through the exhaust component on the second pipeline, close the exhaust component, and in accordance with the hydrostatic test specification, use the pressure compensation device to continue to inject water and compensate the pressure for the second pipeline, and read the indication of the pressure gauge.

[0031] By adopting the above technical solutions, the pressure test of the water supply pipeline can be carried out quickly and accurately. The overall operation steps are scientific and simple. It can not only make reasonable use of water resources and reduce water waste, but also speed up the overall test process and improve the test efficiency when the pressure test of multiple pipelines is required.

[0032] In summary, the present application includes at least one of the following beneficial technical effects:

[0033] 1. By setting up a circulation component and a pressure compensation device, at least two pipelines can be connected simultaneously, so that the water in the pipeline that has completed the pressure test can be cycled and pumped into the empty pipeline to be tested, thus enabling the recycling of the pressure test water, improving the utilization rate of the pressure test water, and greatly reducing the waste of the pressure test water;

[0034] 2. By setting up a circulation pump, a first water pipe, a second water pipe, a first ball valve and a second ball valve, it is convenient to connect the water circulation device to the pipeline. The first ball valve and the second ball valve can stably block the two water pipes, thus ensuring that the pipeline will not be affected by the water circulation device during the pressure test;

[0035] 3. By setting up a third water pipe and a third ball valve, the first pipeline and the second pipeline form a communicating vessel, so that part of the pressure test water in the first pipeline can automatically circulate into the second pipeline, reducing the use of the circulation pump and effectively prolonging the service life of the circulation pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 is a schematic structural diagram of a water circulation device for a municipal water pipe pressure test in cooperation with a pipeline;

[0037] Figure 2 is a front view of the upstream end of the pipeline;

[0038] Figure 3 is a schematic structural diagram of the water circulation device.

[0039] Description of the reference numerals: 1, pipeline; 101, first pipeline; 102, second pipeline; 11, flange; 12, blind flange; 13, exhaust component; 131, installation pipe; 132, branch pipe; 133, first manual valve; 134, exhaust valve; 135, second manual valve; 2, circulation component; 21, circulation pump; 22, first water pipe; 23, second water pipe; 231, check valve; 24, third water pipe; 25, first ball valve; 26, second ball valve; 27, third ball valve; 28, fourth ball valve; 3, pressure compensation device; 4, flow switch; 5, water tank; 6, fourth water pipe; 7, fifth ball valve; 8, filter; 9, pressure gauge. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0040] The following is combined with the attachedFigures 1-3 Further details of this application will be described below.

[0041] A water circulation device for pressure testing of municipal water pipes disclosed in this application, in combination with Figure 1 , Figure 2 , the two ends of the pipe 1 to be pressure-tested are arranged vertically offset, and the two ends are respectively set as the upstream end and the downstream end. Flange plates 11 are welded on both ends of the pipe 1, flange blind plates 12 connected to the flange plates 11 by bolts, and an exhaust assembly 13 installed on the flange blind plate 12 at the upstream end of the pipe 1 and communicating inside and outside the pipe 1.

[0042] Referring to Figure 2 , the exhaust assembly 13 includes a mounting pipe 131 fixed on the flange blind plate 12 and communicating both sides of the flange blind plate 12, a first manual valve 133 installed on one end of the mounting pipe 131 located outside the pipe 1, an exhaust valve 134 installed on the end of the first manual valve 133 away from the mounting pipe 131, a branch pipe 132 with one end fixed on the mounting pipe 131 and communicating with the mounting pipe 131, and a second manual valve 135 installed on the other end of the branch pipe 132. The manual valve can close the exhaust valve 134 and the branch pipe 132.

[0043] During use, after opening the manual valve, water can be quickly injected into the pipe 1 through the branch pipe 132, thereby effectively accelerating the process of pressure testing of the pipe 1. When injecting water into the pipe 1, the gas in the pipe 1 is discharged through the exhaust valve 134, maintaining the internal air pressure balance of the pipe 1 and facilitating the injection of water into the pipe 1.

[0044] In combination with Figure 1 , Figure 3 , the water circulation device includes a circulation assembly 2 that can be connected to two pipes 1 simultaneously, a flow switch 4 installed at the water inlet end of the circulation assembly 2, and a pressure compensation device 3 connected to the circulation assembly 2 to pressurize the pipe 1. In this embodiment, the pressure compensation device 3 uses a pressure pump, which has the characteristics of simple operation and stable pressure increase and decrease, thus being beneficial for pressure testing of the pipe 1. The water circulation device also includes a water tank 5 that can be connected to both the water inlet end of the circulation assembly 2 and the pressure compensation device 3 and is filled with water, so as to replenish water to the pipe 1. Compared with using an external water source, it can quickly fill the pipe 1 with water at a test site where water diversion is inconvenient, which is beneficial for pressure testing of the pipe 1.

[0045] Referring to Figure 3, the circulation component 2 includes a circulation pump 21 that provides circulation power for the pressure test water, a first water pipe 22 with one end connected to the water inlet end of the circulation pump 21, one end that can be connected to the water inlet end of the circulation pump 21 and the other end detachably connected to the downstream end of the pipeline 1 and communicating with the flange blind plate 12, a second water pipe 23 with one end connected to the water outlet end of the circulation pump 21 and the other end also detachably connected and communicating with the flange blind plate 12, and a third water pipe 24 with both ends fixedly connected and communicating with the first water pipe 22 and the second water pipe 23 respectively.

[0046] After the first water pipe 22 is connected to the downstream end of the first pipeline 101 that has completed the pressure test and the second water pipe 23 is connected to the downstream end of the second pipeline 102 to be tested, after opening the exhaust valve 134 on the second pipeline 102, the third water pipe 24 connects the two pipelines 1 so that the two pipelines 1 form a communicating vessel, enabling a large amount of pressure test water in the first pipeline 101 to flow to the second pipeline 102 until the pressure test water no longer flows to the second pipeline 102 and then stops, thus starting to recycle the pressure test water.

[0047] A check valve 231 for preventing the reverse flow of the pressure test water tank 5 to the circulation pump 21 is installed on the second water pipe 23, which can not only prevent the reverse flow of the pressure test water from damaging the circulation pump 21, reduce the probability of damage to the circulation pump 21, extend its service life, but also keep the internal pressure of the second pipeline 102 to be tested stable.

[0048] The circulation component 2 further includes a first ball valve 25 installed on the first water pipe 22 to close the first water pipe 22, a second ball valve 26 installed on the second pipeline 102 to close the second water pipe 23, and a third ball valve 27 installed on the third water pipe 24 to close the third water pipe 24. After connecting the first water pipe 22 to the pipeline 1, the third ball valve 27 is located on the side of the first ball valve 25 away from the pipeline 1. After connecting the first water pipe 22 and the second water pipe 23 to the pipeline 1, by closing the first ball valve 25 and the second ball valve 26 simultaneously, the circulation component 2 can be pre-connected to the two pipelines 1, facilitating the subsequent circulation of the pressure test water on the premise that the pipeline 1 remains closed.

[0049] Refer to Figure 3 , the circulation component 2 further includes a fourth ball valve 28 installed on a section of the first water pipe 22 close to the circulation pump 21, and the fourth ball valve 28 is located between the circulation pump 21 and the pressure supplement device 3. When the first ball valve 25 is opened, while closing the third ball valve 27 and the fourth ball valve 28, or when the second ball valve 26 and the third ball valve 27 are opened, while closing the first ball valve 25 and the fourth ball valve 28, two closed paths are respectively formed, enabling the pressure supplement device 3 to respectively pressurize and replenish water to the first pipeline 101 and the second pipeline 102.

[0050] Refer to Figure 3, the water tank 5 is connected to the circulation pump 21 through a fourth water pipe 6 with one end communicating with the inside of the water tank 5. The first water pipe 22 is communicated with the fourth water pipe 6 through a fourth ball valve 28. A filter 8 for filtering water is installed at the other end of the fourth water pipe 6, and the filter 8 is connected to the flow switch 4. At the same time, the filter 8 is on the path of the passage where the pressure supplement device 3 is communicated with the fourth ball valve 28, and the fourth ball valve 28 is located between the filter 8 and the pressure supplement device 3. The filter 8 can not only filter the water flowing from the water tank 5 to the circulation pump 21 and then enter the circulation pump 21, but also filter the pressure test water flowing out of the first pipeline 101, so as to effectively avoid the sundries contained in the water from damaging the circulation pump 21 and form a strong protection for the circulation pump 21.

[0051] A fifth ball valve 7 is also installed on the fourth water pipe 6, and the fifth ball valve 7 is located between the filter 8 and the water tank 5. Thus, by operating the fifth ball valve 7, it is easy to control the water flowing out of the water tank 5, and the water replenishment can be controlled according to the actual water replenishment required in the actual aisle.

[0052] Referring to Figure 3 , a pressure gauge 9 for measuring the pressure of the pipeline 1 is also installed on the water circulation pipe device. The pressure gauge 9 is installed on the first pipeline 101, and the pressure gauge 9 is located between the pressure supplement device 3 and the fourth ball valve 28. When performing a pressure test on the pipeline 1, the pressure value inside the pipeline 1 can be obtained by reading the indication of the pressure gauge 9, so as to facilitate the test of the pipeline 1.

[0053] The implementation principle of a water circulation device for municipal water pipe pressure test and its use method in this application embodiment is as follows: The first pipeline 101 that has completed the pressure test and the second pipeline 102 to be tested can be connected through the first water pipe 22 and the second water pipe 23. According to the corresponding pipeline 1, the corresponding ball valve is opened or closed to form a closed state for the pipeline 1 under test. When the test is completed, first, open and close the corresponding ball valve to connect the first pipeline 101 and the second pipeline 102, so that most of the pressure test water automatically flows from the first pipeline 101 to the second pipeline 102; secondly, close and open the corresponding ball valve and turn on the circulation pump 21, then the pressure test water remaining in the first pipeline 101 can continue to flow to the second pipeline 102; finally, through the pressure supplement device 3 and the water tank 5, the second pipeline 102 is pressure-supplemented and water-supplemented to meet the requirements of the pressure test. Compared with directly discharging the pressure test water, the pressure test water can be reasonably utilized, reducing the waste of water resources. The water circulation pipe device is scientifically and reasonably designed, with low overall cost and easy to manufacture. At the same time, the overall volume of the water circulation device is small, which is convenient for carrying and moving at the test site and has strong applicability.

[0054] This application embodiment also discloses a use method of a water circulation device for municipal water pipe pressure test, which includes the following steps:

[0055] Step 1: A pressure gauge 9 is connected to the downstream end of the first pipeline 101. The first water pipe 22 is connected to the downstream end of the first pipeline 101 after the test is completed. Then, the fourth ball valve 28 and the fifth ball valve 7 are closed, and the first ball valve 25, the second ball valve 26, the third ball valve 27, and the exhaust assembly 13 at the upstream end of the first pipeline 101 and the second pipeline 102 to be filled with water are opened.

[0056] Step 2: After the pressure test water in the first pipeline 101 no longer automatically flows into the second pipeline 102, the third ball valve 27 is closed, the fourth ball valve 28 is opened, and the circulation pump 21 is turned on.

[0057] Step 3: After the circulation pump 21 no longer extracts the pressure test water from the first pipeline 101, the first ball valve 25 is closed, the fifth ball valve 7 is opened, and the pressure boosting device 3 is turned on.

[0058] Step 4: After the pressure test water flows out through the exhaust assembly 13 on the second pipeline 102, the exhaust assembly 13 is closed, and in accordance with the water pressure test specification, the pressure boosting device 3 is used to continue to perform stepped water injection and pressure boosting on the second pipeline 102, and the reading of the pressure gauge 9 is taken.

[0059] By using the water circulation device, the pressure test water can be recycled, reducing water resource waste. At the same time, the pressure test of the water supply pipeline 1 can be carried out quickly and accurately. The overall operation steps are scientific and simple. When the pressure test needs to be carried out on multiple pipelines 1, the overall test process can be accelerated, and the working efficiency of the test can be improved.

[0060] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A water circulation device for the pressure test of municipal water pipes, characterized in that: It includes a circulating component (2) for connecting to a pipeline (1), and a pressure supplementing device (3) for supplementing pressure in the pipeline (1). The circulating component (2) is provided with a water inlet end and a water outlet end that can be respectively communicated with the pipeline (1). Both the water inlet end and the water outlet end can be closed, and there is at least one water outlet end. A one-way valve (231) for blocking the test pressure water from flowing into the circulating component (2) is installed on the water outlet end; the circulating component (2) includes a circulating pump (21), and a first water pipe (22) and a second water pipe (23) respectively connected to the water inlet end and the water outlet end of the circulating pump (21). The end of the water pipe far from the circulating pump (21) can be connected to the pipeline (1). A first ball valve (25) is installed on the first water pipe (22), a second ball valve (26) is installed on the second water pipe (23), and the one-way valve (231) is located between the second ball valve (26) and the circulating pump (21); A third water pipe (24) for communicating the two is installed between the first water pipe (22) and the second water pipe (23), and a third ball valve (27) is installed on the third water pipe (24); A flow switch (4) is installed on the water inlet end of the circulating pump (21). The output end of the pressure supplementing device (3) is connected to the first water pipe (22), and a fourth ball valve (28) is also installed on the first water pipe (22). The fourth ball valve (28) is located between the pressure supplementing device (3) and the circulating pump (21); It also includes a water tank (5) respectively connected to the water inlet end of the circulating component (2) and the pressure supplementing device (3). A fourth water pipe (6) with one end communicating with the water tank (5) is installed on the water tank (5). The other end of the fourth water pipe (6) is connected to the water inlet end of the circulating component (2). A fifth ball valve (7) is installed on the fourth water pipe (6). The fifth ball valve (7) is located between the flow switch (4) and the water tank (5).

2. The water circulation device for municipal water pipe pressure test according to claim 1, characterized in that: It also includes a filter (8) connected between the flow switch (4) and the fifth ball valve (7).

3. The water circulation device for municipal water pipe pressure test according to claim 2, characterized in that: The filter (8) is located between the flow switch (4) and the fourth ball valve (28).

4. A water circulation device for municipal water pipe pressure test according to claim 3, characterized in that: A pressure gauge (9) is installed on the first water pipe (22). The pressure gauge (9) is located between the fourth ball valve (28) and the pressure supplementing device (3).

5. A method for using the water circulation device according to any one of claims 1-4, characterized in that: The steps include: Step 1: Connect the first water pipe (22) to the downstream end of the first pipeline (101) that has completed the test. A pressure gauge (9) is installed on the first water pipe (22). Then close the fourth ball valve (28) and the fifth ball valve (7), and open the first ball valve (25), the second ball valve (26), the third ball valve (27), and the exhaust assembly (13) at the upstream end of the first pipeline (101) and the second pipeline (102) to be filled with water; Step 2: After the pressure test water in the first pipeline (101) no longer automatically flows to the second pipeline (102), close the third ball valve (27), open the fourth ball valve (28), and turn on the circulation pump (21); Step 3: After the circulation pump (21) no longer pumps out the pressure test water from the first pipeline (101), close the first ball valve (25), open the fifth ball valve (7), and turn on the pressure compensation device (3); Step 4: After the pressure test water flows out through the exhaust assembly (13) on the second pipeline (102), close the exhaust assembly (13), and continue to perform upgraded water injection and pressure compensation on the second pipeline (102) using the pressure compensation device (3) in accordance with the water pressure test specification, and read the indication of the pressure gauge (9).

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