A performance detection system for a foam screw pump of a shield tunneling machine and a detection method thereof

Abstract

The application discloses a kind of shield machine foam screw pump performance detection system and control method thereof, comprising: the detection platform for installing the foam screw pump to be measured, and the speed adjusting part for adjusting the rotating speed of foam screw pump is arranged on the detection platform;Support platform is arranged on the detection platform, and support platform is placed with foam tank, and one end of foam tank is communicated with detection pipeline, and detection pipeline is communicated to the end of mounting bracket away from speed adjusting part, and pressure detection assembly and flow detection assembly are arranged on detection pipeline along pipeline, and flow detection assembly and flow detection assembly are electrically connected with control cabinet;Safety pipeline is arranged on foam tank, and first valve group is arranged on safety pipeline.The application simplifies shield machine foam screw pump maintenance process, changes "disassembly repair" to "test evaluation first, then targeted repair", greatly reduces the manpower and material resources investment when foam screw pump is overhauled, saves a lot of maintenance time, and improves the work efficiency of maintenance.

Description

Technical Field

[0001] This invention relates to the field of tunnel boring machine (TBM) maintenance technology, and in particular to a performance testing system and method for a TBM foam screw pump. Background Technology

[0002] A typical tunnel boring machine (TBM) is equipped with 6 or 8 foam screw pumps. Currently, the company performs maintenance on over 100 TBMs annually, with screw pumps requiring significant oversight. During TBM maintenance, intermediate repairs, or major overhauls, screw pumps are disassembled and inspected. After inspection, worn parts and seals are replaced. However, during actual disassembly and inspection, it was discovered that screw pumps with intact structure and function were disassembled a second time and reassembled, requiring seal replacement. This resulted in a waste of materials and labor, causing unnecessary economic losses to the company. Summary of the Invention

[0003] The present invention aims to at least partially solve one of the technical problems in the related art.

[0004] To achieve the above objectives, the present invention proposes a performance testing system for a shield tunneling machine foam screw pump, comprising: a testing platform for mounting the foam screw pump to be tested, wherein the testing platform is provided with a mounting frame for mounting the foam screw pump to be tested, and one end of the mounting frame is provided with a speed regulating component for adjusting the speed of the foam screw pump;

[0005] The testing platform is equipped with a support platform, on which a foam box is placed. One end of the foam box is connected to a testing pipe, which is connected to the end of the mounting frame away from the speed adjustment component. A pressure detection component and a flow detection component are sequentially arranged on the testing pipe along the flow direction of the medium. Both the flow detection component and the flow detection component are electrically connected to a control cabinet. The foam box is provided with an outlet pipe on the side facing the testing platform for connecting to the inlet of the foam screw pump to be tested.

[0006] The foam box is equipped with a safety pipe, and the safety pipe is equipped with a first valve group. The first valve group is normally closed and is used to provide a safety guarantee for the detection pipe. The safety pipe and the detection pipe are connected at the detection pipe position between the flow detection component and the pressure detection component.

[0007] This invention simplifies the maintenance process of the foam screw pump for tunnel boring machines, changing "disassembly and repair" to "testing and evaluating first, and then performing targeted repairs". This effectively reduces the maintenance cost of the screw pump, greatly reduces the manpower and material resources required for the maintenance of the foam screw pump, saves a lot of maintenance time, and improves the efficiency of maintenance work.

[0008] Optionally, the flow detection assembly includes a first flow meter and a second flow meter arranged along the flow direction of the medium in the pipeline, and a second valve group is provided in the detection pipeline near the inlet of the first flow meter.

[0009] Furthermore, a check valve is installed on the detection pipeline near the outlet of the second flow meter.

[0010] Furthermore, the pressure detection assembly includes a pressure gauge and a pressure sensor sequentially arranged on the detection pipe near the mounting bracket along the direction of the medium flow within the pipe.

[0011] Furthermore, the mounting bracket is provided with a speed sensor for detecting the speed of the foam screw pump under test at one end facing the speed adjustment component. The speed sensor is electrically connected to the control cabinet and is located between the speed adjustment component and the mounting bracket.

[0012] Furthermore, the support frame is provided with a fixing bracket for fixing the detection pipe and the safety pipe.

[0013] Furthermore, the first valve assembly includes a first ball valve, a safety valve, and a second ball valve arranged sequentially along the flow direction of the medium in the pipeline.

[0014] Furthermore, the control cabinet includes a user communication module for displaying data and facilitating user operation; a data acquisition module for collecting data from the flow detection component and the pressure detection component; and a PLC industrial control module for calling and processing the data collected by the data acquisition module.

[0015] This invention also provides a testing method for a performance testing system of a shield machine foam screw pump, comprising the following steps:

[0016] S1. Place the foam screw pump to be tested into the mounting bracket and fix it with bolts. According to the nameplate of the foam screw pump, input the model and standard parameters of the screw pump into the user communication module of the control cabinet.

[0017] S2. Before testing, check the connection status of each pipeline and each line, and open the outlet of the foam box and the second valve group of the test pipeline to pre-charge the foam screw pump under test with fluid medium.

[0018] S3. The speed control device regulates the speed of the foam screw pump, and detects the outlet flow rate and pressure of the foam screw pump at different speeds.

[0019] S4. The speed control device is used to regulate the speed of the foam screw pump, and a pressure holding test is performed on the foam screw pump to measure the change in flow rate with speed at a constant pressure.

[0020] S5. Based on the measurement results of S4 and S5, the performance of the screw pump under test is tested and evaluated, an evaluation report is generated, and a targeted maintenance plan is planned and implemented based on the evaluation report.

[0021] Furthermore, during S3, the second valve group is adjusted until the data of the pressure detection component displayed on the control cabinet increases linearly from 0 bar. The flow rate change of the foam screw pump is detected by the flow detection component and displayed on the user communication module of the control cabinet.

[0022] Furthermore, during S4, after adjusting the second valve group to the predetermined pressure value, the speed of the foam screw pump under test is sequentially adjusted to 25%, 30%, 50%, 75%, and 100% of the highest speed by the speed regulating component, and the flow detection component detects the flow rate of the foam screw pump at the corresponding speed setting.

[0023] Furthermore, when regulating the second valve group to achieve pressure regulation, the safety threshold of the safety valve in the first valve group is adjusted to the same threshold as that of the second valve group, and the first ball valve and the second ball valve are in the open state when performing the corresponding detections of S3 and S4.

[0024] Furthermore, after completing step S5, select one or more speed settings from the five speed settings of the foam screw pump (100%, 75%, 50%, 30%, and 25% of the maximum speed) and conduct several random pressure tests. Compare the test results with the evaluation report generated in step S5 to re-examine the evaluation report results.

[0025] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0026] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein:

[0027] Figure 1 This is a schematic diagram of the performance testing system for a shield tunneling machine foam screw pump according to the present invention;

[0028] Figure 2 A simplified schematic diagram of the testing pipeline for a shield machine foam screw pump performance testing system according to the present invention;

[0029] Figure 3 This is a schematic diagram of the method steps for testing the performance of a shield machine foam screw pump according to the present invention.

[0030] Explanation of reference numerals in the attached figures:

[0031] 1. Testing platform; 2. Mounting bracket; 3. Speed ​​regulator; 4. Support platform; 5. Foam box; 6. Testing pipeline; 61. Pressure detection assembly; 611. Pressure gauge; 612. Pressure sensor; 62. Flow detection assembly; 621. First flow meter; 622. Second flow meter; 63. Second valve assembly; 64. Outlet pipeline; 65. Check valve; 7. Safety pipeline; 71. First valve assembly; 711. First ball valve; 712. Safety valve; 713. Second ball valve; 8. Speed ​​sensor; 9. Mounting bracket; 10. Control box. Detailed Implementation

[0032] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0033] This invention provides a performance testing system for a shield tunneling machine foam screw pump, as described below. Figures 1 to 2 To elaborate in detail.

[0034] A performance testing system for a shield tunneling machine foam screw pump includes: a testing platform 1 for mounting the foam screw pump to be tested, a mounting frame 2 for mounting the foam screw pump to be tested is provided on the testing platform 1, and a speed regulating component 3 for adjusting the speed of the foam screw pump is provided at one end of the mounting frame 2. In this embodiment, the speed regulating component 3 is a motor.

[0035] A support platform 4 is provided on the testing platform 1. A foam box 5 is placed on the support platform 4. A testing pipe 6 is connected to one end of the foam box 5. The testing pipe 6 is connected to the end of the mounting frame 2 away from the speed adjustment component 3. A pressure detection component 61 and a flow detection component 62 are arranged sequentially along the flow direction of the medium in the pipe on the testing pipe 6. Both the flow detection component 62 and the flow detection component 62 are electrically connected to a control cabinet. A water outlet pipe 64 is provided on the side of the foam box 5 facing the testing platform 1 for connecting to the inlet of the foam screw pump to be tested.

[0036] A safety pipe 7 is provided on the foam box 5. A first valve group 71 is provided on the safety pipe 7. The first valve group 71 is normally closed and is used to provide a safety guarantee for the detection pipe 6. The safety pipe 7 and the detection pipe 6 are connected to the detection pipe 6 between the flow detection component 62 and the pressure detection component 61. The safety pipe 7 and the detection pipe 6 merge into a single pipe that enters the foam box 5.

[0037] This invention simplifies the maintenance process of the foam screw pump for tunnel boring machines, changing "disassembly and repair" to "testing and evaluating first, and then performing targeted repairs". This effectively reduces the maintenance cost of the screw pump, greatly reduces the manpower and material resources required for the maintenance of the foam screw pump, saves a lot of maintenance time, and improves the efficiency of maintenance work.

[0038] The support frame is equipped with a fixing frame 9 for fixing the detection pipe 6 and the safety pipe 7. The detection pipe 6 and the safety pipe 7 are fixedly connected to the fixing frame 9 by using fixing rings and fixing bolts, thereby preventing the detection pipe 6 and the safety pipe 7 from detaching from the foam box 5 due to vibration after the medium is introduced into the pipe.

[0039] The flow detection assembly 62 includes a first flow meter 621 and a second flow meter 622 arranged along the flow direction of the medium in the pipeline. A second valve group 63 is provided on the detection pipeline 6 near the inlet of the first flow meter 621. The first flow meter 621 and the second flow meter 622 can perform numerical correction and equipment calibration between each other. Furthermore, to prevent backflow of foam medium in the detection pipeline 6, a one-way valve 65 is provided on the detection pipeline 6 near the outlet of the second flow meter 622, located before the confluence of the detection pipeline 6 and the safety pipeline 7, thereby ensuring that the foam medium in the detection pipeline 6 will not backflow, causing changes in the pressure and flow rate within the pipeline.

[0040] The pressure detection assembly 61 includes a pressure gauge 611 and a pressure sensor 612, which are sequentially arranged on the detection pipe 6 near the mounting bracket 2 along the direction of medium flow in the pipe.

[0041] In order to regulate the speed of the screw pump, a speed sensor 8 for detecting the speed of the foam screw pump under test is provided at the end of the mounting bracket 2 facing the speed regulating component 3. The speed sensor 8 is electrically connected to the control cabinet and is located between the speed regulating component 3 and the mounting bracket 2.

[0042] The first valve assembly 71 includes a first ball valve 711, a safety valve 712, and a second ball valve 713 arranged sequentially along the flow direction of the medium in the pipeline. During pressure and flow detection, the safety threshold of the safety valve 712 in the first valve assembly 71 is adjusted to the same threshold as that in the second valve assembly 63, and both the first ball valve 711 and the second ball valve 713 are also in the open state during the pressure holding test. After the test is completed, the threshold of the safety valve 712 is reset to zero, and both the first ball valve 711 and the second ball valve 713 are closed.

[0043] To facilitate staff observation of test results and control of corresponding vertical operations, the control cabinet is located on one side of the foam box 5. The control cabinet includes a user communication module for displaying data and user operation; a data acquisition module for collecting data from the flow detection component 62 and the pressure detection component 61; and a PLC industrial control module for calling and processing the data collected by the data acquisition module.

[0044] This application also provides a testing method for a performance testing system of a shield machine foam screw pump, referring to... Figure 3 This includes the following steps:

[0045] S1. Place the foam screw pump to be tested into the mounting bracket 2 and fix it with bolts. According to the nameplate of the foam screw pump, input the model and standard parameters of the screw pump into the user communication module of the control cabinet.

[0046] S2. Before testing, check the connection status of each pipeline and each line, and open the outlet of foam box 5 and the second valve group 63 of test pipeline 6 to pre-charge the foam screw pump under test with fluid medium.

[0047] S3, the speed control adjustment component 3 adjusts the speed of the foam screw pump, and detects the outlet flow rate and pressure of the foam screw pump at different speeds;

[0048] S4. Control the speed adjustment component 3 to adjust the speed of the foam screw pump, and conduct a pressure holding test on the foam screw pump to measure the change in flow rate with speed at a constant pressure.

[0049] S5. Based on the measurement results of S4 and S5, the performance of the screw pump under test is tested and evaluated, an evaluation report is generated, and a targeted maintenance plan is planned and implemented based on the evaluation report.

[0050] During the S2 process, the connections of the pipelines and lines on the testing platform 1 need to be checked, ensuring that there are no leaks or looseness. Before testing, open the manual ball valves at the outlet of foam box 5 and the inlet of the screw pump to pre-charge the screw pump with fluid medium to prevent dry friction during instantaneous startup.

[0051] When performing S3 and S4, it is necessary to wait until the overall system is running stably before performing numerical tests. The test data before stable operation is filtered out during the data processing.

[0052] When performing S3, the second valve group 63 is adjusted until the data of the pressure detection component 61 displayed on the control cabinet increases linearly from 0 bar. The flow rate change of the foam screw pump is detected by the flow detection component 62 and displayed on the user communication module of the control cabinet.

[0053] When the second valve group 63 is regulated to achieve pressure regulation, the safety threshold of the safety valve 712 in the first valve group 71 is adjusted to the same threshold as that of the second valve group 63, and the first ball valve 711 and the second ball valve 713 are in the open state when performing corresponding detections S3 and S4.

[0054] During S4, after adjusting the second valve group 63 to the predetermined pressure value, the speed of the foam screw pump under test is sequentially adjusted to 25%, 30%, 50%, 75%, and 100% of the highest speed by the speed regulating component 3. The flow detection component 62 detects the flow rate of the foam screw pump at the corresponding speed setting.

[0055] After completing steps S3 and S4, the PLC industrial control module in the control cabinet can process the overall test data and output real-time curves showing the relationship between speed and flow rate, and pressure and flow rate on the AC module. This data is then statistically stored, and operators can observe the test data in real-time on the user's AC module display interface.

[0056] After completing step S5, select one or more speed settings from the five speed settings of the foam screw pump (100%, 75%, 50%, 30%, and 25% of the maximum speed) and conduct several random pressure tests. Compare the test results with the evaluation report generated in step S5 to re-examine the results of the evaluation report.

[0057] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0058] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0059] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A performance testing system for a shield tunneling machine foam screw pump, characterized in that, include: A testing platform for mounting a foam screw pump under test is provided on the testing platform. The testing platform is equipped with a mounting frame for mounting the foam screw pump under test. One end of the mounting frame is equipped with a speed adjustment component for adjusting the speed of the foam screw pump. The testing platform is equipped with a support platform, on which a foam box is placed. One end of the foam box is connected to a testing pipe, which is connected to the end of the mounting frame away from the speed adjustment component. Pressure detection components and flow detection components are sequentially arranged along the flow direction of the medium on the testing pipe. Both the pressure detection components and the flow detection components are electrically connected to a control cabinet. The foam box is provided with an outlet pipe on the side facing the testing platform for connecting to the inlet of the foam screw pump to be tested. The foam box is equipped with a safety pipe, and the safety pipe is equipped with a first valve group. The first valve group is normally closed and is used to provide a safety guarantee for the detection pipe. The safety pipe and the detection pipe are connected at the detection pipe position between the flow detection component and the pressure detection component. The first valve group includes a first ball valve, a safety valve, and a second ball valve arranged sequentially along the flow direction of the medium in the pipeline. When performing pressure and flow detection, the safety threshold of the safety valve is adjusted to the same threshold as that of the second valve group used to regulate pressure on the detection pipeline, and the first ball valve and the second ball valve are in the open state. After the test is completed, the threshold of the safety valve is reset to zero and the first ball valve and the second ball valve are closed.

2. The shield machine foam screw pump performance testing system as described in claim 1, characterized in that, The flow detection assembly includes a first flow meter and a second flow meter arranged along the flow direction of the medium in the pipeline, and a second valve group is provided near the inlet of the first flow meter in the detection pipeline.

3. The shield machine foam screw pump performance testing system as described in claim 2, characterized in that, A check valve is installed on the detection pipeline near the outlet of the second flow meter.

4. The shield machine foam screw pump performance testing system as described in claim 1, characterized in that, The pressure detection assembly includes a pressure gauge and a pressure sensor arranged sequentially along the flow direction of the medium in the pipe near one end of the mounting bracket on the detection pipe.

5. The shield machine foam screw pump performance testing system as described in claim 1, characterized in that, The mounting bracket is provided with a speed sensor for detecting the speed of the foam screw pump under test at one end facing the speed adjustment component. The speed sensor is electrically connected to the control cabinet and is located between the speed adjustment component and the mounting bracket.

6. The shield machine foam screw pump performance testing system as described in claim 1, characterized in that, The support platform is equipped with a fixing frame for fixing the detection pipe and the safety pipe.

7. The shield machine foam screw pump performance testing system according to claim 1, characterized in that, The control cabinet includes a user communication module for displaying data and facilitating user operation; and a data acquisition module for collecting data from the flow detection component and the pressure detection component. A PLC industrial control module used to call and process data acquired by the data acquisition module.

8. A testing method for a performance testing system of a foam screw pump for a tunnel boring machine, characterized in that, The shield machine foam screw pump performance testing system as described in any one of claims 1-7 includes the following steps: S1. Place the foam screw pump to be tested into the mounting bracket and fix it with bolts. According to the nameplate of the foam screw pump, input the model and standard parameters of the screw pump into the user communication module of the control cabinet. S2. Before testing, check the connection status of each pipeline and each line, and open the outlet of the foam box and the second valve group of the test pipeline to pre-charge the foam screw pump under test with fluid medium. S3. The speed control device regulates the speed of the foam screw pump, and detects the outlet flow rate and pressure of the foam screw pump at different speeds. S4. The speed control device is used to regulate the speed of the foam screw pump, and a pressure holding test is performed on the foam screw pump to measure the change in flow rate with speed at a constant pressure. S5. Based on the measurement results of S3 and S4, test and evaluate the performance of the screw pump under test, form an evaluation report, and plan and implement a targeted maintenance plan based on the evaluation report.

9. The testing method for a shield machine foam screw pump performance testing system according to claim 8, characterized in that, When performing S3, the second valve group is adjusted until the data of the pressure detection component on the control cabinet increases linearly from 0 bar. The flow rate change of the foam screw pump is detected by the flow detection component and displayed on the user communication module of the control cabinet.

10. The testing method for a shield machine foam screw pump performance testing system according to claim 8, characterized in that, During S4, after adjusting the second valve group to the predetermined pressure value, the speed of the foam screw pump under test is sequentially adjusted to 25%, 30%, 50%, 75%, and 100% of the maximum speed using the speed regulating component. The flow detection component detects the flow rate of the foam screw pump at the corresponding speed setting.

11. A testing method for a performance testing system of a shield machine foam screw pump according to any one of claims 8-10, characterized in that, When regulating the second valve group to achieve pressure regulation, the safety threshold of the safety valve in the first valve group is adjusted to the same threshold as that of the second valve group, and the first ball valve and the second ball valve are in the open state when performing the corresponding detections of S3 and S4.

12. The testing method for a shield machine foam screw pump performance testing system according to claim 11, characterized in that, After completing step S5, select one or more speed settings from the five speed settings of the foam screw pump (100%, 75%, 50%, 30%, and 25% of the maximum speed) and conduct several random pressure tests. Compare the test results with the evaluation report generated in step S5 to re-examine the results of the evaluation report.

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