Rotating wheel pressing operation device for rotating wheel assembly test tool

Abstract

The utility model relates to the technical field of axial flow Kaplan turbines, in particular to a rotating wheel pressurizing operation device for a rotating wheel assembly test tool, which comprises a plurality of pressurizing pipes, a plurality of oil return pipes, a plurality of connecting pipes and a plurality of valves, the head ends of the pressurizing pipes are connected with a servomotor open cavity, a rotating wheel inner cavity and a servomotor closed cavity in a one-to-one manner, and the connecting pipes are connected with the connecting pipes. Oil return pipes are respectively connected to the pressurizing pipes in parallel, one end of each oil return pipe is communicated with the corresponding pressurizing pipe, the other end of each oil return pipe is communicated with the corresponding second connecting pipe after being connected in parallel, and valves are respectively and correspondingly arranged on the pressurizing pipes and the oil return pipes. The device and a test tool form a test system, oil injection and pressure boosting of three cavities can be realized by switching opening and closing of the valves, the problem of pipeline pressure building can be solved by adjusting the opening degree of the valves, all tests can be completed by one-time installation, repeated disassembly and assembly are not needed, the structure is simple, and the test efficiency and the test safety are greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of axial flow Kaplan turbines, and particularly relates to a runner pressure test operation device for a runner assembly test tool. Background Technique

[0002] The units of axial flow Kaplan turbines are generally overhauled once every 8 to 10 years. During the overhaul, the seals of the runner blades and the operating cylinders need to be replaced. Due to the long interval between overhauls and high costs, once oil leakage occurs after the overhaul, it is difficult to handle and the cost of rework is high. Therefore, a tightness pressure test on the runner blade seals and cylinders is a necessary measure to inspect the overhaul quality of the units and ensure the long-term healthy operation of the units after overhaul.

[0003] Currently, after the various parts of the runner assembly test tool are combined and connected, the entire test tool is then connected to the runner body. The opening and closing of the blades are controlled by injecting pressure into the opening cavity and closing cavity of the servomotor through the runner assembly test tool to conduct the blade movement test. After the blade movement test is completed, oil is injected into the inner cavity of the runner to increase the pressure for the blade seal test.

[0004] When using the test tool for the seal test, separate experiments need to be carried out on three chambers. During the process, the operators have been working on the upper part of the runner body. Since working at heights poses certain potential risks, it is not conducive to the safety of the operators. Moreover, during the test process, due to the pressure buildup in the pipelines, situations such as slow oil injection speed and easy loosening and oil leakage at the pipeline joints may occur, causing environmental pollution. At the same time, due to the need to rely on an additional pressure source, integrated operation cannot be carried out, which all affects the on-site construction progress and work efficiency. Content of the Utility Model

[0005] Aiming at the technical problems existing in the background technique, the purpose of the utility model is to provide a runner pressure test operation device for a runner assembly test tool, which forms a test system with the test tool, operates the test system to inject oil and increase the pressure in three chambers, and opens the valve of the replacement device to complete all tests.

[0006] To achieve the above purpose, the technical solution provided by the utility model is as follows:

[0007] A runner pressure test operation device for a runner assembly test tool includes: a pressure pipe, a return pipe, a connecting pipe and a valve. A plurality of the pressure pipes and the return pipes are correspondingly arranged. The head end of the pressure pipe is connected to the opening cavity of the servomotor, the inner cavity of the runner and the closing cavity of the servomotor one by one, and the tail ends are connected in parallel and then communicated with the first connecting pipe. The return pipes are respectively connected in parallel on the pressure pipes. One end of the return pipe is communicated with the pressure pipe, and the other ends are connected in parallel and then communicated with the second connecting pipe. The valves are respectively correspondingly arranged on the pressure pipe and the return pipe.

[0008] Preferably, the pressure pipes include a servomotor opening cavity pressure pipe connected to the servomotor opening cavity through a pipeline, a runner inner cavity pressure pipe connected to the inner cavity of the runner, and a servomotor closing cavity pressure pipe connected to the servomotor closing cavity.

[0009] Preferably, the oil return pipes include a servomotor opening cavity oil return pipe connected in parallel with the servomotor opening cavity pressure pipe, a runner inner cavity oil return pipe connected in parallel with the runner inner cavity pressure pipe, and a servomotor closing cavity oil return pipe connected in parallel with the servomotor closing cavity pressure pipe.

[0010] Preferably, the pressure pipe is connected to the pressure oil pump through the first connecting pipe.

[0011] Preferably, the oil return pipe is connected to the oil return tank through the second connecting pipe.

[0012] The utility model has the following advantages and beneficial effects:

[0013] In the utility model, the device and the test tool are assembled and used to form a test system. Only by switching the opening and closing of the valves can the oil injection and pressure increase of the three cavities be realized, and the problem of pipeline pressure buildup can be solved by the valve opening. The test system can complete all tests after being installed once without repeated disassembly and assembly. The test system has a simple structure, greatly improving the test efficiency and test safety. The device transfers the original high-risk test location to ground operation, ensuring the life safety of the operators and further improving the construction progress. Description of the Drawings

[0014] Figure 1 is a schematic structural diagram of the runner pressure test device shown in the embodiment of the present application;

[0015] Figure 2 is a schematic connection diagram of the test tool and the runner body shown in the embodiment of the present application;

[0016] Reference numerals: 1 - servomotor opening cavity pressure pipe, 2 - servomotor opening cavity oil return pipe, 3 - runner inner cavity pressure pipe, 4 - runner inner cavity oil return pipe, 5 - servomotor closing cavity pressure pipe, 6 - servomotor closing cavity oil return pipe, 7 - first valve, 8 - second valve, 9 - third valve, 10 - fourth valve, 11 - fifth valve, 12 - sixth valve, 13 - pressure gauge, 14 - first connecting pipe, 15 - second connecting pipe, 16 - servomotor opening cavity connecting pipe, 17 - servomotor closing cavity connecting pipe, 18 - inner operation oil pipe connecting pipe, 19 - internal hose structure. Detailed Embodiments

[0017] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some, but not all, of the embodiments of the present utility model.

[0018] Therefore, the following detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the claimed present utility model, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model.

[0019] Embodiment

[0020] As Figure 1 shown, a runner pressure application operation device for a runner assembly test tool includes: a pressure pipe, an oil return pipe, a connecting pipe, and a valve. There are three pressure pipes, including a servomotor opening chamber pressure pipe 1 for connecting with the servomotor opening chamber, a runner inner chamber pressure pipe 3 for connecting with the runner inner chamber, and a servomotor closing chamber pressure pipe 5 for connecting with the servomotor closing chamber. The three pressure pipes are connected to a first connecting pipe 14 through a four-way head and are connected to a pressure oil pump through the first connecting pipe 14. A first valve 7 is installed on the servomotor opening chamber pressure pipe 1, a third valve 9 is installed on the runner inner chamber pressure pipe 3, and a fifth valve 11 is installed on the servomotor closing chamber pressure pipe 5.

[0021] There are 3 oil return pipes corresponding to the pressure pipes, including a servomotor opening chamber oil return pipe 2, a runner inner chamber oil return pipe 4, and a servomotor closing chamber oil return pipe 6. The servomotor opening chamber oil return pipe 2 is in parallel with the servomotor opening chamber pressure pipe 1, the runner inner chamber oil return pipe 4 is in parallel with the runner inner chamber pressure pipe 3, and the servomotor closing chamber oil return pipe 6 is in parallel with the servomotor closing chamber pressure pipe 5. The runner inner chamber oil return pipe 4 is connected to the servomotor opening chamber oil return pipe 2 through a three-way head, and a second connecting pipe 15 is connected to the servomotor opening chamber oil return pipe 2, the servomotor closing chamber oil return pipe 6 through a three-way head. A second valve 8 is installed on the servomotor opening chamber oil return pipe 2, a fourth valve 10 is installed on the runner inner chamber oil return pipe 4, and a sixth valve 12 is installed on the servomotor closing chamber oil return pipe 6.

[0022] As Figure 2 shown, when the test tool is installed, after firmly connecting the internal hose structure 19 with the inner operation oil pipe plug and the inner operation oil pipe connecting pipe 18, the entire test tool is connected to the runner body, and then the runner pressure application operation device is connected. The servomotor opening chamber connecting pipe 16 is connected to the servomotor opening chamber pressure pipe 1 through a pipeline, the servomotor closing chamber connecting pipe 17 is connected to the servomotor closing chamber pressure pipe 5 through a pipeline, and the inner operation oil pipe connecting pipe 18 is connected to the runner inner chamber pressure pipe 3 through a pipeline.

[0023] Before the test, all valves of the runner pressure test operation device are in the closed state. During the test, open the first valve 7 and close the second valve 8. The pressure oil pump injects oil into the opening cavity of the servomotor through the connecting pipe 16 of the servomotor opening cavity to increase the pressure (at this time, the closing cavity of the servomotor to the connecting pipe 17 of the servomotor closing cavity is the oil return pipe, close the fifth valve 11, and open the sixth valve 12 to return oil to the oil return tank) to complete the action of opening the blade; the pressure oil pump injects oil into the closing cavity of the servomotor through the connecting pipe 17 of the servomotor closing cavity to increase the pressure (at this time, the opening cavity of the servomotor to the connecting pipe 16 of the servomotor opening cavity is the oil return pipeline, close the first valve 7, and open the second valve 8 to return oil to the oil return tank) to complete the action of closing the blade. Repeat the opening and closing of the blade multiple times, which is the blade action test.

[0024] After the blade action test is completed, open the third valve 9. The pressure oil pump injects oil into the inner cavity of the runner through the inner operation oil pipe connecting pipe 18 and the inner operation oil pipe, and at the same time, the pressure can also be increased. After the pressure meets the requirements, close the third valve 9 for pressure holding. During the pressure holding process, the oil pump injects oil into the opening cavity of the servomotor through the connecting pipe 16 of the servomotor opening cavity to increase the pressure (at this time, the closing cavity of the servomotor to the connecting pipe 17 of the servomotor closing cavity is the oil return pipe, close the fifth valve 11, and open the sixth valve 12 to return oil to the oil return tank) to complete the action of opening the blade; the pressure oil pump injects oil into the closing cavity of the servomotor through the connecting pipe 17 of the servomotor closing cavity to increase the pressure (at this time, the opening cavity of the servomotor to the connecting pipe 16 of the servomotor opening cavity is the oil return pipeline, close the first valve 7, and open the second valve 8 to return oil to the oil return tank) to complete the action of closing the blade. During the blade action process, check whether there is any leakage at the blade seal and other parts, which is the blade seal test.

[0025] During the test process, adjust the pipeline pressure by adjusting the opening degree of each valve. A pressure gauge 13 is installed correspondingly on the pipeline, and the real-time pressure of the corresponding pipeline is obtained through the pressure gauge 13 to solve the problems such as slow oil injection speed and easy loosening and oil leakage at the pipeline joints caused by pipeline pressure buildup.

[0026] The above is only the preferred embodiment of the present utility model and is not used to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A runner pressure application operation device for a runner assembly test tool, characterized in that Comprising: A pressure pipe, a return oil pipe, a connecting pipe and a valve. A number of the pressure pipes and the return oil pipes are correspondingly arranged. The head end of the pressure pipe is connected one-to-one with the opening cavity of the servomotor, the inner cavity of the runner and the closing cavity of the servomotor through the connecting pipe. The tail ends of a number of the pressure pipes are respectively communicated with a first connecting pipe. A return oil pipe is respectively connected in parallel on each of the pressure pipes. One end of the return oil pipe is communicated with the pressure pipe. The other ends of a number of the return oil pipes are respectively communicated with a second connecting pipe. Valves are respectively arranged on the pressure pipe and the return oil pipe.

2. The runner pressure testing operation device according to claim 1, wherein, The pressure pipe includes a servomotor opening cavity pressure pipe connected to the opening cavity of the servomotor through a pipeline, a runner inner cavity pressure pipe connected to the inner cavity of the runner, and a servomotor closing cavity pressure pipe connected to the closing cavity of the servomotor.

3. The runner pressure testing operation device according to claim 2, wherein The return oil pipe includes a servomotor opening cavity return oil pipe connected in parallel with the servomotor opening cavity pressure pipe, a runner inner cavity return oil pipe connected in parallel with the runner inner cavity pressure pipe, and a servomotor closing cavity return oil pipe connected in parallel with the servomotor closing cavity pressure pipe.

4. The runner pressure test operation device according to claim 1, wherein, The pressure pipe is connected to a pressure oil pump through the first connecting pipe.

5. The runner pressure test operation device according to claim 1, characterized in that The return oil pipe is connected to a return oil tank through the second connecting pipe.

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