A test method for a synchronous double-liquid grouting device

Abstract

The application discloses a kind of synchronous double liquid grouting device test methods, comprising the following steps: layout working condition simulation system connects the inner cavity of synchronous double liquid grouting pipe, and layout power control system connects the piston rod of synchronous double liquid grouting pipe;Load is applied to piston rod by power control system, and working condition simulation system controls piston rod to reciprocate along inner cavity, executes wear test;Different positions of piston rod are locked by power control system, and according to working condition simulation system, pressure oil is output to the inner cavity of synchronous double liquid grouting pipe, and executes pressure leakage test.The beneficial effects of the application: the working scene of the synchronous double liquid grouting device is simulated by the hydraulic system in the application to test the synchronous double liquid grouting device.No need to install real machine, can effectively reduce test cost, also can reduce test difficulty and requirement to test space.

Description

Technical Field

[0001] This application relates to the field of hydraulic technology, and in particular to a test method for a synchronous dual-liquid grouting device. Background Technology

[0002] Traditionally, single-liquid grouting (inert grout, hardenable grout) is commonly used in the synchronous grouting process of shield tunnel construction. However, with the development of technology, synchronous dual-liquid grouting in shield tunnel construction has gradually been promoted. Especially in strata with a water content greater than 30%, highly permeable strata, soft and uneven strata, and with nearby buildings or structures passing through, where settlement control requirements are high, it is recommended to use synchronous dual-liquid grouting or supplement it with special mud-resistant grouts.

[0003] In the process of simultaneous two-liquid grouting, the performance of the grouting device used to perform the simultaneous two-liquid grouting is crucial for feedback on the grouting effect behind the wall and for areas sensitive to ground deformation. Most existing testing methods rely on collecting grouting ratio (grouting quality) and project quality data as testing methods for two-liquid grouting devices and actual machine installation inspections. However, both of these testing methods are not suitable for actual production needs in terms of both volume and testing cost. Summary of the Invention

[0004] One objective of this application is to provide a test method for a synchronous dual-liquid grouting device that can solve at least one of the defects in the aforementioned background art.

[0005] To achieve at least one of the above objectives, the technical solution adopted in this application is as follows: a testing method for a synchronous dual-liquid grouting device, comprising the following steps: 1) setting up a working condition simulation system connected to the inner cavity of the synchronous dual-liquid grouting pipe; 2) setting up a power control system connected to the piston rod of the synchronous dual-liquid grouting pipe; 3) applying a load to the piston rod through the power control system, and controlling the piston rod to reciprocate along the inner cavity through the working condition simulation system, thereby performing a wear resistance test on the synchronous dual-liquid grouting pipe; 4) locking the piston rod at different positions through the power control system, and outputting pressure oil to the inner cavity of the synchronous dual-liquid grouting pipe according to the working condition simulation system, thereby performing a pressure leakage test on the synchronous dual-liquid grouting pipe; 5) calculating the theoretical number of uses of the synchronous dual-liquid grouting pipe based on the data obtained from the wear resistance test and the pressure leakage test.

[0006] Preferably, the synchronous dual-liquid grouting pipe includes a grouting port on the outer side, a cleaning water port on the inner side, and a mortar port in the middle. When performing the wear resistance test of the extended piston rod, the working condition simulation system injects oil into the inner cavity of the synchronous dual-liquid grouting pipe through the grouting port. During the piston rod extension process, if the mortar port is not connected to the grouting port, the working condition simulation system provides working pressure to the inner side of the synchronous dual-liquid grouting pipe through the mortar port and the cleaning water port. If the mortar port is connected to the grouting port, the working condition simulation system performs synchronous dual-liquid grouting through the cleaning water port. The inner side of the pipe provides working pressure; when performing the wear resistance test of the piston rod retraction, if the mortar port and the grouting port are connected, the working condition simulation system injects oil into the inner cavity of the synchronous dual-liquid grouting pipe through the cleaning water port, and the working condition simulation system provides working pressure to the outer side of the synchronous dual-liquid grouting pipe through the mortar port and the grouting port; if the mortar port is not connected to the grouting port, the working condition simulation system injects oil into the inner cavity of the synchronous dual-liquid grouting pipe through the cleaning water port and the mortar port, and the working condition simulation system provides working pressure to the outer side of the synchronous dual-liquid grouting pipe through the grouting port.

[0007] Preferably, a controllable first oil inlet is provided at the grouting port, and a controllable second oil inlet is provided at the cleaning water outlet; the pressure leakage test of the synchronous dual-liquid grouting pipe includes the following process: moving the piston rod to a position close to the front end of the grouting port and locking it, while simultaneously shutting off the mortar outlet; the working condition simulation system supplies oil through the grouting port, and then obtains the pressure leakage amount on the outside of the synchronous dual-liquid grouting pipe through the first oil inlet which is in the open position; the working condition simulation system supplies oil through the cleaning water outlet, and then obtains the pressure leakage amount on the outside of the synchronous dual-liquid grouting pipe through the first oil inlet which is in the open position. The pressure-resistant leakage rate inside the synchronous dual-liquid grouting pipe is obtained through the second oil inlet that is in the open position; the piston rod is moved to the rear end near the cleaning water inlet and locked in position, while maintaining the cut-off of the mortar inlet; the working condition simulation system supplies oil through the grouting inlet, and then obtains the pressure-resistant leakage rate outside the synchronous dual-liquid grouting pipe through the first oil inlet that is in the open position; the working condition simulation system supplies oil through the cleaning water inlet, and then obtains the pressure-resistant leakage rate inside the synchronous dual-liquid grouting pipe through the second oil inlet that is in the open position.

[0008] Preferably, the working condition simulation system includes a first oil tank, a first pump set, a first reversing valve, and three valve oil circuits; the first ends of the three valve oil circuits are respectively connected to the grouting port, the mortar port, and the cleaning water port, and the second ends of the three valve oil circuits are all connected to the first oil tank; the input end of the first pump set is connected to the first oil tank, and the output end of the first pump set is connected to the valve oil circuits connected to the grouting port and the cleaning water port respectively through the first reversing valve; when performing the wear resistance test of the piston rod extension, the first pump set supplies oil to the grouting port, and the valve oil circuits connected to the mortar port and the cleaning water port are used to provide working pressure; when performing the wear resistance test of the piston rod retraction, the valve oil circuits connected to the grouting port and the mortar port are used to provide working pressure; when performing the pressure resistance leakage test, the valve oil circuit connected to the mortar port is shut off for oil discharge; depending on the location of the pressure resistance leakage test, the first pump set switches to supply oil to the grouting port or the cleaning water port through the position of the first reversing valve.

[0009] Preferably, each valve circuit includes a connected control valve and a relief valve; the relief valve is used to provide working pressure when performing wear resistance testing, and the control valve is used to control the opening or closing of the valve circuit; the first reversing valve is disposed between the control valve and the relief valve in the valve circuit connecting the grouting port and the cleaning water port.

[0010] Preferably, the valve oil circuit connected to the mortar inlet and the cleaning water inlet further includes a one-way valve; one end of the one-way valve is connected between the control valve and the overflow valve, and the other end of the one-way valve is connected to the first oil tank; the conduction direction of the one-way valve is towards the synchronous dual-liquid grouting pipe; when performing the wear resistance test of the piston rod retraction, the one-way valve conducts to balance the inner pressure of the synchronous dual-liquid grouting pipe.

[0011] Preferably, the nozzle is connected via a ball valve between the overflow valve and the first directional valve in the valve oil circuit connected to the grouting port; during wear resistance testing and pressure leakage testing, the ball valve is in the closed state; when testing the nozzle, the ball valve is in the open state, and the first directional valve is switched to the closed state; the nozzle is pressure tested by supplying oil to the nozzle through the first pump set and adjusting the overflow pressure of the overflow valve in the valve oil circuit connected to the grouting port.

[0012] Preferably, the power control system includes a second oil tank, a second pump group, a second reversing valve, and a drive cylinder; the input end of the second pump group is connected to the second oil tank; the two ports on the first side of the second reversing valve are respectively connected to the output end of the second pump group and the second oil tank, and the two ports on the second side of the second reversing valve are respectively connected to the rod chamber and the rodless chamber of the drive cylinder through a drive branch; the output end of the drive cylinder is connected to the piston rod; the second reversing valve is adapted to control the output end of the drive cylinder to reciprocate when performing the wear resistance test of the synchronous dual-liquid grouting pipe; the second reversing valve is adapted to cut off the rod chamber and the rodless chamber of the drive cylinder when performing the pressure leakage test of the synchronous dual-liquid grouting pipe.

[0013] Preferably, the power control system further includes a pair of hydraulically controlled check valves and a pair of throttle valves; the two hydraulically controlled check valves are respectively installed in the two drive branches, and the hydraulically controlled ends of the two hydraulically controlled check valves are respectively connected to the other drive branch; the hydraulically controlled check valves are adapted to cut off the rod chamber and rodless chamber of the drive cylinder when performing the pressure leakage test of the synchronous dual-liquid grouting pipe; the two throttle valves are respectively installed in the two drive branches; when performing the wear resistance test of the synchronous dual-liquid grouting pipe, the working speed of the drive cylinder is adjusted by adjusting the opening of the throttle valves.

[0014] Preferably, the wear coefficient K of the synchronous dual-liquid grouting pipe is calculated based on the data obtained from the wear resistance test. W Based on the data obtained from the pressure leakage test of the synchronous dual-liquid grouting pipe, the actual pressure difference ΔP between the two ends of the synchronous dual-liquid grouting pipe is calculated; then the formula for calculating the theoretical number of uses T of the synchronous dual-liquid grouting pipe is:

[0015] ;

[0016] Where Q represents flow rate, F represents normal load, L represents wear path, H represents hardness, A represents contact area, C represents material wear resistance coefficient, W represents working load, and p represents fluid density.

[0017] Compared with the prior art, the beneficial effects of this application are as follows:

[0018] This application uses a hydraulic system to simulate the working scenario of a synchronous dual-liquid grouting device to achieve testing of the device. Compared with traditional testing methods, this application can directly test the synchronous dual-liquid grouting device without the need for actual machine installation, effectively reducing testing costs, difficulty, and space requirements. Simulating actual working conditions better matches real production requirements, effectively ensuring testing accuracy. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall architecture of this application.

[0020] Figure 2 A schematic diagram of the working condition simulation system for conducting wear resistance tests for this application.

[0021] Figure 3 A schematic diagram of the power control system's workflow during wear resistance testing for this application.

[0022] Figure 4 This is a schematic diagram of the overall workflow for conducting a pressure leakage test on the piston rod at the front end for this application.

[0023] Figure 5 This is a table showing the control terminal action status of each valve unit in this application under different test modes.

[0024] In the diagram: Synchronous dual-liquid grouting pipe 100, working condition simulation system 2, first oil tank 21, first pump group 22, first overflow valve 23, ball valve 24, first reversing valve 25, first control valve 26, second control valve 27, second overflow valve 28, third control valve 29, third overflow valve 210, fourth control valve 211, fifth control valve 212, first check valve 213, second check valve 214, power control system 3, second oil tank 31, second pump group 32, fourth overflow valve 33, second reversing valve 34, hydraulic control check valve 35, throttle valve 36, drive cylinder 37, nozzle 400. Detailed Implementation

[0025] The present application will now be further described in conjunction with specific embodiments. It should be noted that, in the description of this specification, the use of terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicates that the 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 should not be construed as necessarily referring 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. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0026] In the description of this application, it should be noted that the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., which indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and should not be construed as limiting the specific protection scope of this application.

[0027] It should be noted that the terms "first," "second," etc., in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0028] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0029] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0030] The terms “comprising” and “having”, and any variations thereof, in the specification and claims of this application are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or device.

[0031] For ease of understanding, a brief description of the specific structure of the synchronous dual-liquid grouting device is provided first. The synchronous dual-liquid grouting device includes a synchronous dual-liquid grouting pipe 100 and a nozzle 400. The synchronous dual-liquid grouting pipe 100 is used to synchronously transport cement (A grout) and quick-setting agent (B grout), allowing them to be instantly mixed and injected at the nozzle 400. The specific structure of the synchronous dual-liquid grouting pipe 100 and the nozzle 400 is well known to those skilled in the art, and therefore will not be described in detail here. Generally, a piston rod, serving as a valve core, is slidably installed in the sealed cavity of the synchronous dual-liquid grouting pipe 100. The function of the piston rod is to draw the two grouts to the outside of the synchronous dual-liquid grouting pipe 100 for output. The inner cavity of the synchronous dual-liquid grouting pipe 100 can be divided into an outer side and an inner side according to the direction of grout injection. The side closer to the injection point is the outer side, and a grouting port is provided at the end of this position. The side farther from the injection point is the inner side, and a cleaning water port is provided at this position for cleaning the inner cavity of the synchronous dual-liquid grouting pipe 100 after grout injection is completed. At the same time, a mortar port that can communicate with the inner cavity is provided in the middle of the synchronous dual-liquid grouting pipe 100 for delivering a fast-setting agent into the inner cavity of the synchronous dual-liquid grouting pipe 100.

[0032] Based on the specific structure of the aforementioned synchronous dual-liquid grouting device, the main objective of this application is to test the synchronous dual-liquid grouting pipe 100 and the nozzle 400. Specifically, the synchronous dual-liquid grouting pipe 100 undergoes wear resistance and pressure leakage tests according to its operating conditions, while the nozzle 400 undergoes pressure tests according to its operating conditions. To facilitate understanding of the technical solution of this application, the specific testing process of the synchronous dual-liquid grouting device will be described in detail below.

[0033] One preferred embodiment of this application, such as Figure 1 As shown, a testing method for a synchronous dual-liquid grouting device includes the following steps: A working condition simulation system 2 is connected to the inner cavity of the synchronous dual-liquid grouting pipe 100, and a power control system 3 is connected to the piston rod of the synchronous dual-liquid grouting pipe 100. A load is applied to the piston rod through the power control system 3, and the working condition simulation system 2 controls the piston rod to reciprocate along the inner cavity, performing a wear resistance test on the synchronous dual-liquid grouting pipe 100. The piston rod is locked at different positions through the power control system 3, and pressure oil is output to the inner cavity of the synchronous dual-liquid grouting pipe 100 according to the working condition simulation system 2, performing a pressure leakage test on the synchronous dual-liquid grouting pipe 100; based on the data obtained from the wear resistance test and the pressure leakage test, the theoretical number of uses of the synchronous dual-liquid grouting pipe 100 is calculated.

[0034] Understandably, during the use of the synchronous dual-liquid grouting pipe 100, if wear occurs—that is, the piston rod (valve core) and the inner cavity reciprocate for a long time, and the gap increases after wear—it causes cross-penetration of the A and B grouts before they reach the predetermined mixing position, resulting in an imbalance in the final mixing ratio and potentially causing blockage of the synchronous dual-liquid grouting pipe 100. Simultaneously, wear of the synchronous dual-liquid grouting pipe 100 may cause wear particles to enter the gap between the piston rod and the embedded part, increasing frictional resistance, causing pressure fluctuations in the hydraulic system, and even potentially preventing the piston rod from closing completely. If leakage occurs in the synchronous dual-liquid grouting pipe 100, it may cause partial leakage of the A and B grouts before they are mixed, also leading to an imbalance in the A and B grout mixing ratio, resulting in a decrease in the strength of the solidified body and failure to meet the settlement control requirements of the shield tunnel. Leakage may also cause the grouting pressure to be unsustainable, resulting in incomplete grout filling and ultimately voids in the grout.

[0035] Therefore, before using the synchronous dual-liquid grouting pipe 100, wear resistance and pressure leakage tests can be conducted. Based on the test results, the service life of the synchronous dual-liquid grouting pipe 100 can be calculated. Specifically, for the use of the synchronous dual-liquid grouting pipe 100, one reciprocating motion of the internal piston rod can be considered as one operation of the synchronous dual-liquid grouting pipe 100. Therefore, the service life of the synchronous dual-liquid grouting pipe 100 can be quantified by the number of uses. Based on the quantification results, the service life of the synchronous dual-liquid grouting pipe 100 can be transformed from a traditional empirical description into a mathematical model, providing data basis for subsequent design selection and spare parts.

[0036] Meanwhile, compared to traditional indirect testing of synchronous dual-liquid grouting devices through engineering quality and actual on-site testing, the technical solution of this application uses a working condition simulation system 2 to simulate the working resistance of the synchronous dual-liquid grouting device during actual use, and a power control system 3 to simulate the load force of the synchronous dual-liquid grouting device during actual use. During testing, only the synchronous dual-liquid grouting pipe 100 needs to be connected to the working condition simulation system 2 and the power control system 3; no actual installation is required, thus effectively reducing testing costs, testing difficulty, and space requirements. Furthermore, the simulation of actual working conditions better matches actual production requirements, effectively ensuring testing accuracy. For ease of understanding, the wear resistance test and pressure leakage test will be described in detail below.

[0037] I. Wear resistance test of synchronous dual-liquid grouting pipe 100.

[0038] In this embodiment, as Figure 1 and Figure 2As shown, since the piston rod's movement includes two actions—extension and retraction—the wear resistance test of the synchronous dual-liquid grouting pipe 100 can be described in two processes: piston rod extension and piston rod retraction. For ease of understanding, the specific working process of the working condition simulation system 2 during piston rod extension and retraction will be described below.

[0039] Initially, the piston rod can be assumed to be in a fully retracted state. At this time, the piston of the piston rod is close to the outer front end of the synchronous dual liquid pipe 100, and the mortar port and the cleaning water port are in a conductive state.

[0040] When performing the piston rod extension wear test, the working condition simulation system 2 injects oil into the outer side of the inner cavity of the synchronous dual-liquid grouting pipe 100 through the grouting port; as the oil enters, the piston rod will extend inward. During the extension process, depending on whether the piston rod passes the mortar port, the piston rod stroke can be divided into a first stroke when the mortar port is not connected to the grouting port, and a second stroke when the mortar port and the grouting port are connected. When the piston rod is in the first stroke, the working condition simulation system 2 can provide working pressure to the inner side of the synchronous dual-liquid grouting pipe 100 through the mortar port and the cleaning water port, thereby simulating the fluid resistance encountered when the piston rod extends. When the piston rod is in the second stroke, the working condition simulation system 2 provides working pressure to the inner side of the synchronous dual-liquid grouting pipe 100 through the cleaning water port, thereby simulating the fluid resistance encountered when the piston rod extends. When the piston rod extends to its maximum stroke, the piston rod extension wear test ends, and the piston rod retraction wear test will be performed next.

[0041] When performing the wear resistance test for piston rod retraction, the piston rod's stroke is reversed: first, a second stroke occurs where the mortar inlet and grouting inlet are connected; then, a first stroke occurs where the mortar inlet and grouting inlet are not connected. During the second stroke, the operating condition simulation system 2 can supply oil to the inner cavity of the synchronous dual-liquid grouting pipe 100 through the cleaning inlet, and simultaneously provide working pressure to the outer side of the synchronous dual-liquid grouting pipe 100 through the mortar inlet and grouting inlet. During the first stroke, the operating condition simulation system 2 can simultaneously supply oil to the inner cavity of the synchronous dual-liquid grouting pipe 100 through both the cleaning inlet and mortar inlet, and at this time, the operating condition simulation system 2 can provide working pressure to the outer side of the synchronous dual-liquid grouting pipe 100 through the grouting inlet. The wear resistance test for piston rod retraction ends when the piston rod retracts to its minimum stroke, i.e., back to its initial position.

[0042] Each completion of the piston rod extension and retraction wear resistance test can be considered as completing one wear resistance test. After each wear resistance test is completed, the number of tests can be accumulated. When the accumulated number of tests reaches the required number of tests, the wear resistance test of the synchronous dual-liquid grouting pipe 100 can be ended.

[0043] In this embodiment, the working condition simulation system 2, which can be used for wear resistance testing and pressure leakage testing, has various specific structures. For ease of understanding, one of these structures will be described in detail below. Figure 1 As shown, the working condition simulation system 2 includes a first oil tank 21, a first pump set 22, a first reversing valve 27, and three valve oil circuits. The first ends of the three valve oil circuits are respectively connected to the grouting port, the mortar port, and the cleaning water port, and the second ends of the three valve oil circuits are all connected to the first oil tank 21. The input end of the first pump set 22 is connected to the first oil tank 21, and the output end of the first pump set 22 is connected to the valve oil circuits connected to the grouting port and the cleaning water port through the first reversing valve 27.

[0044] When performing the wear resistance test with the piston rod extended, the first pump unit 22 supplies oil to the grouting port, and the valve oil circuit connected to the mortar port and the cleaning water port provides the working pressure. When performing the wear resistance test with the piston rod retracted, the valve oil circuit connected to the grouting port and the mortar port provides the working pressure. When performing the pressure leakage test, the valve oil circuit connected to the mortar port is shut off to drain oil; depending on the location of the pressure leakage test, the first pump unit 22 switches the position of the first reversing valve 27 to supply oil to either the grouting port or the cleaning water port.

[0045] It is understood that the specific structure of the first pump unit 22 is well known to those skilled in the art, and therefore will not be described in detail here. For ease of distinction, the three valve oil circuits can be defined as the first valve oil circuit, the second valve oil circuit, and the third valve oil circuit, respectively; wherein, the first valve oil circuit is connected to the grouting port, the second valve oil circuit is connected to the mortar port, and the third valve oil circuit is connected to the cleaning water port. For ease of understanding, the specific working process of the wear resistance test will be described in detail below based on the specific structure of the three valve oil circuits.

[0046] Specifically, each valve circuit includes a connected control valve and a relief valve; the relief valve provides working pressure during wear resistance testing, and the control valve controls the opening or closing of the valve circuit. The first valve circuit includes a first relief valve 23 and a first control valve 26; the first control valve 26 connects to the grouting port at the first end of the first valve circuit, and the first relief valve 23 connects to the first oil tank 21 at the second end of the first valve circuit. The second valve circuit includes a second relief valve 28 and a second control valve 27; the second control valve 27 connects to the mortar inlet at the first end of the second valve circuit, and the second relief valve 28 connects to the first oil tank 21 at the second end of the second valve circuit. The third valve circuit includes a third control valve 29 and a third relief valve 210; the third control valve 29 connects to the cleaning water inlet at the first end of the third valve circuit, and the third relief valve 210 connects to the first oil tank 21 at the second end of the third valve circuit. A first directional valve 25 is installed at the midpoint between the first and second valve circuits, i.e., between the relief valve and the control valve.

[0047] When conducting a wear resistance test on the synchronous dual-liquid grouting pipe 100, such as Figure 1 and Figure 2 As shown, the first control valve 26, the second control valve 27, and the third control valve 29 are all in the open state. The first directional valve 25 can connect the grouting port to the output end of the first pump group 22, and at the same time connect the cleaning water port to the first oil tank 21. Then, after the first pump group 22 is started, the first pump group 22 can supply oil to the grouting port through the open first control valve 26, and then the piston rod can extend.

[0048] When the piston rod is working in the first stroke where the grouting port is not connected to the mortar port, since both the second control valve 27 and the third control valve 29 are in the conducting state, the oil inside the synchronous dual-liquid grouting pipe 100 can flow back to the first oil tank 21 through the second valve oil circuit and the third valve oil circuit. Then, the working pressure can be provided to the inside of the synchronous dual-liquid grouting pipe 100 by adjusting the opening of the second overflow valve 28 and the third overflow valve 210.

[0049] When the piston rod operates in the second stroke where the grouting port and mortar port are connected, the oil inside the synchronous dual-liquid grouting pipe 100 can flow back to the first oil tank 21 through the third valve oil circuit because the third control valve 29 is in the open state. Furthermore, the working pressure can be provided to the inside of the synchronous dual-liquid grouting pipe 100 by adjusting the opening of the third overflow valve 210. Simultaneously, the second overflow valve 28 can be adjusted to ensure sufficient driving force on the outside of the synchronous dual-liquid grouting pipe 100.

[0050] When the piston rod extends to its maximum stroke, it will retract. At this time, the piston rod first works in the second stroke, where the grouting port and mortar port are connected. Since both the first control valve 26 and the second control valve 27 are in the open state at this time, the oil outside the synchronous dual-liquid grouting pipe 100 can flow back to the first oil tank 21 through the first valve oil circuit and the second valve oil circuit. Then, the working pressure can be provided to the outside of the synchronous dual-liquid grouting pipe 100 by adjusting the opening of the first overflow valve 23 and the second overflow valve 28.

[0051] Then, when the piston rod is working in the first stroke when the grouting port and mortar port are not connected, since the first control valve 26 is in the conducting state, the oil outside the synchronous double liquid grouting pipe 100 can flow back to the first oil tank 21 through the first valve oil circuit, and then the working pressure can be provided to the outside of the synchronous double liquid grouting pipe 100 by adjusting the opening of the first overflow valve 23.

[0052] It is understood that there are various types of the first directional valve 25, the first control valve 26, the second control valve 27, and the third control valve 29, and their specific structures and working principles are well known to those skilled in the art, so they will not be described in detail here. In this embodiment, the first directional valve 25 is preferably a Y-type three-position four-way solenoid valve, and the first directional valve 25, the first control valve 26, and the second control valve 27 are preferably two-position two-way solenoid ball valves. The two control terminals that control the valve core of the first directional valve 25 to move left and right can be defined as YVH01a and YVH01b, respectively. When the control terminal YVH01a is energized, the first directional valve 25 can connect the grouting port to the first oil tank 21 and the cleaning water port to the output terminal of the first pump group 22. When the control terminal YVH01b is energized, the first directional valve 25 can connect the grouting port to the output terminal of the first pump group 22 and the cleaning water port to the first oil tank 21. The control terminal of the first control valve 26 can be defined as YV01, the control terminal of the second control valve 27 can be defined as YV02, and the control terminal of the third control valve 29 can be defined as YV03. For the control valves, when the control terminal is energized, the control valve is in a one-way cut-off state, and the cut-off direction is always the oil return direction; when the control terminal is de-energized, the control valve is in a two-way conduction state.

[0053] For ease of understanding, the following describes the operational states of the first directional valve 25, the first control valve 26, and the second control valve 27 during the wear resistance test. Assume the energized control terminal is marked "+", and the de-energized control terminal is marked "-". Figure 5 As shown, during the wear resistance test, the action of control terminal YVH01a is "-", the action of control terminal YVH01b is "+", and the actions of control terminals YV01, YV02 and YV03 are all "-".

[0054] It should be noted that during the piston rod retraction, the first pump unit 22 is connected to the first valve oil circuit, but the first valve oil circuit is used for oil return during this process, therefore the first pump unit 22 needs to be stopped. When the first pump unit 22 is stopped, the inner side of the synchronous dual-liquid grouting pipe 100 cannot be supplied with oil through the first pump unit 22. However, to ensure the piston rod can move normally, the inner side of the synchronous dual-liquid grouting pipe 100 needs to draw oil through the second and third valve oil circuits under negative pressure. Since the overflow valve has unidirectional conductivity, it cannot achieve the above function; therefore, the second and third valve oil circuits need to be improved.

[0055] Specifically, such as Figure 1As shown, the second valve circuit also includes a first check valve 213, and the third valve circuit also includes a second check valve 214. One end of the first check valve 213 is connected between the second relief valve 28 and the second control valve 27, and the other end is connected to the first oil tank 21. One end of the second check valve 214 is connected between the third relief valve 210 and the third control valve 29, and the other end is connected to the first oil tank 21. The first check valve 213 and the second check valve 214 are closed in the return oil direction. Therefore, when the piston rod extends, during the return oil process of the second and third valve circuits, the first check valve 213 and the second check valve 214 can be in the closed state, ensuring the stable operation of the second relief valve 28 and the third relief valve 210. When the piston rod retracts, the first check valve 213 and the second check valve 214 can be opened under the negative pressure inside the synchronous dual-liquid grouting pipe 100, so that the oil in the first oil tank 21 can flow into the inside of the synchronous dual-liquid grouting pipe 100 through the second control valve 27 and the third control valve 29 respectively.

[0056] In this embodiment, the power control system 3, which can be used for wear resistance testing and pressure leakage testing, has various specific structures. For ease of understanding, one of these structures will be described in detail below. Figure 1 As shown, the power control system 3 includes a second oil tank 31, a second pump assembly 32, a second directional valve 34, and a drive cylinder 37. The input end of the second pump assembly 32 is connected to the second oil tank 31; the two ports on the first side of the second directional valve 34 are respectively connected to the output end of the second pump assembly 32 and the second oil tank 31, and the two ports on the second side of the second directional valve 34 are respectively connected to the rod chamber and the rodless chamber of the drive cylinder 37 through a drive branch; the output end of the drive cylinder 37 is connected to the piston rod.

[0057] It should be noted that, to ensure the accuracy of the stroke of the drive cylinder 37, a displacement sensor can be installed on the drive cylinder 37 to monitor its stroke. The specific installation method of the displacement sensor is well-known to those skilled in the art and will not be described in detail here. To complete the test of the synchronous dual-liquid grouting pipe 100, the total stroke of the drive cylinder 37 must be at least equal to the total stroke of the synchronous dual-liquid grouting pipe 100. For ease of control, in this embodiment, it is preferable that the total stroke of the drive cylinder 37 is equal to the total stroke of the synchronous dual-liquid grouting pipe 100. For ease of understanding, the specific working process of the power control system 3 in the wear resistance test of the synchronous dual-liquid grouting pipe 100 will be described in detail below.

[0058] Initially, the piston rod of the synchronous dual-liquid grouting pipe 100 is in a fully retracted state; correspondingly, the drive cylinder 37 is in a fully extended maximum stroke state at this time.

[0059] like Figure 3 As shown, when the first pump group 22 supplies oil to the grouting port of the synchronous dual-liquid grouting pipe 100 to drive the piston rod to extend, the second reversing valve 34 can connect the output end of the second pump group 32 to the rod chamber of the drive cylinder 37, and simultaneously connect the rodless chamber of the drive cylinder 37 to the second oil tank 31. This allows the second pump group 32 to supply oil to the rod chamber of the drive cylinder 37, driving the drive cylinder 37 to retract synchronously with the piston rod's extension. Thus, the movement of the piston rod in the drive cylinder 37 simulates the application of a load.

[0060] When the piston rod reaches its maximum stroke, i.e., when the drive cylinder 37 reaches its minimum stroke, the second directional valve 34 can switch the output end of the second pump set 32 ​​to connect to the rodless chamber of the drive cylinder 37. At this time, the rod chamber of the drive cylinder 37 is connected to the second oil tank 31 through the second directional valve 34. Oil is supplied to the rodless chamber of the drive cylinder 37 by the second pump set 32, causing the drive cylinder 37 to extend, which in turn pushes the piston rod to retract until the drive cylinder 37 reaches its maximum stroke, i.e., the piston rod reaches its minimum stroke.

[0061] Each extension or retraction of the drive cylinder 37 can be considered as completing one wear resistance test. After each wear resistance test is completed, the number of tests can be accumulated. When the accumulated number of tests reaches the required number of tests, the wear resistance test of the synchronous dual-liquid grouting pipe 100 can be terminated.

[0062] It is understood that the specific structure and working principle of the second pump group 32 and the second reversing valve 34 are well-known technologies to those skilled in the art, and therefore will not be described in detail here. In this embodiment, the second reversing valve 34 preferably adopts a Y-type three-position four-way solenoid valve. The two control terminals for controlling the left and right movement of the valve core of the second reversing valve 34 can be defined as YVH02a and YVH02b, respectively. When the control terminal YVH02a is energized, the second reversing valve 34 can connect the output terminal of the second pump group 32 with the rodless chamber of the drive cylinder 37, and at the same time connect the rod chamber of the drive cylinder 37 with the second oil tank 31. When the control terminal YVH02b is energized, the second reversing valve 34 can connect the output terminal of the second pump group 32 with the rod chamber of the drive cylinder 37, and at the same time connect the rodless chamber of the drive cylinder 37 with the second oil tank 31. Then, during the entire wear resistance test of the synchronous dual-liquid grouting pipe 100, if Figure 5 As shown, the control terminals YVH02a and YVH02b of the second reversing valve 34 are alternately energized.

[0063] It should be noted that, in order to ensure the output safety of the second pump set 32, a fourth relief valve 33 can also be installed between the output end of the second pump set 32 ​​and the second oil tank 31. When the pressure of the drive cylinder 37 increases due to an abnormality, the output pressure oil of the second pump set 32 ​​can flow back to the second oil tank 31 through the fourth relief valve 33.

[0064] Understandably, during the wear resistance test, the drive cylinder 37 needs to provide load resistance to the piston rod. There are various ways to achieve this load resistance; in this embodiment, the load resistance is simulated by adjusting the working speed of the drive cylinder 37. There are multiple ways to adjust the working speed of the drive cylinder 37; for ease of understanding, one specific implementation method will be described in detail below.

[0065] Specifically, such as Figure 1 As shown, the power control system 3 also includes a pair of throttle valves 36; the two throttle valves 36 are respectively installed in the two drive branches. When performing the wear resistance test of the synchronous dual-liquid grouting pipe 100, the working speed of the drive cylinder 37 is adjusted by adjusting the opening of the throttle valves 36.

[0066] II. Pressure resistance and leakage test for synchronous dual-liquid grouting pipe 100.

[0067] It is important to know that the pressure leakage test of the synchronous dual-liquid grouting pipe 100 includes a pressure leakage test with the piston rod located at the outer front end and a pressure leakage test with the piston rod located at the inner rear end. Regardless of whether the piston rod is located at the outer front end or the inner rear end, both outer and inner pressure leakage tests are required. For ease of understanding, the pressure leakage test process of the synchronous dual-liquid grouting pipe 100 will be described in detail below.

[0068] In this embodiment, as Figure 1 As shown, a controllable first oil inlet is set at the grouting port, and a controllable second oil inlet is set at the cleaning water inlet. The pressure leakage test for the synchronous dual-liquid grouting pipe 100 includes the following procedures:

[0069] First, move the piston rod to the front end near the grouting port and lock it in place, while simultaneously shutting off the mortar inlet.

[0070] Then, the working condition simulation system 2 supplies oil through the grouting port, and then obtains the pressure resistance leakage of the outside of the synchronous dual liquid grouting pipe 100 through the first oil intake port that is in the conduction state; at this time, the pressure resistance test of the piston rod located at the front end is completed.

[0071] Then, the working condition simulation system 2 supplies oil through the cleaning water port, and then obtains the pressure resistance leakage of the inner side of the synchronous dual liquid grouting pipe 100 through the second oil intake port that is in the conduction position; at this time, the pressure resistance test of the inner side of the piston rod at the front end is completed.

[0072] Then, move the piston rod to the rear end near the cleaning water inlet and lock it in place, while keeping the mortar outlet closed.

[0073] Then, the working condition simulation system 2 supplies oil through the grouting port, and then obtains the pressure resistance leakage of the outside of the synchronous dual liquid grouting pipe 100 through the first oil intake port that is in the conduction state; at this time, the pressure resistance test of the piston rod located at the rear end is completed.

[0074] Finally, the working condition simulation system 2 supplies oil through the cleaning water inlet, and then obtains the pressure resistance leakage of the inner side of the synchronous dual liquid grouting pipe 100 through the second oil inlet that is in the conduction state; at this time, the pressure resistance test of the inner side of the piston rod located at the rear end is completed.

[0075] For ease of understanding, the pressure leakage test process of the synchronous dual-liquid grouting pipe 100 will be described in detail below, taking into account the specific structures of the aforementioned working condition simulation system 2 and power control system 3.

[0076] Pressure leakage test for the plug rod located at the outer front end.

[0077] like Figure 4 As shown, the first pump group 22 can be controlled to supply oil to the cleaning water port through the first reversing valve 25, and then the piston rod will retract until it is fully retracted to the front end position near the outer side. During this process, the second pump group 32 can supply oil to the rodless chamber of the drive cylinder 37 through the second reversing valve 34, so that the drive cylinder 37 can extend synchronously with the piston rod retraction. When the drive cylinder 37 reaches its maximum stroke, the second reversing valve 34 can cut off the drive cylinder 37, so that the drive cylinder 37 is in a position-locked state, and thus the piston rod is also position-locked.

[0078] After the piston rod is locked, the second control valve 27 can be energized to shut off the second valve oil circuit. Then, the first pump group 22 can supply oil to the grouting port through the first reversing valve 25. Since the piston rod is locked, the outer side of the synchronous dual-liquid grouting pipe 100 is under high pressure, so the first oil outlet can be opened to observe the pressure resistance leakage of the outer side of the synchronous dual-liquid grouting pipe 100. Then, the first pump group 22 can supply oil to the cleaning water port through the first reversing valve 25. Since the piston rod is locked, the inner side of the synchronous dual-liquid grouting pipe 100 is under high pressure, so the second oil outlet can be opened to observe the pressure resistance leakage of the inner side of the synchronous dual-liquid grouting pipe 100.

[0079] Pressure leakage test for piston rod located at the inner rear end.

[0080] First, the first pump group 22 can be controlled to supply oil to the grouting port through the first reversing valve 25, thereby extending the piston rod until it is fully extended to the rear end position near the inner side. During this process, the second pump group 32 can supply oil to the rod chamber of the drive cylinder 37 through the second reversing valve 34, so that the drive cylinder 37 can perform a synchronous retraction action as the piston rod extends, until the drive cylinder 37 reaches its minimum stroke. At this point, the second reversing valve 34 can cut off the drive cylinder 37, so that the drive cylinder 37 is in a locked position, thereby locking the piston rod as well.

[0081] After the piston rod is locked, the second control valve 27 can be energized to shut off the second valve oil circuit. Then, the first pump unit 22 can supply oil to the grouting port through the first reversing valve 25. Since the piston rod is locked, the outer side of the synchronous dual-liquid grouting pipe 100 is under high pressure, allowing the first oil outlet to be opened to observe the pressure resistance leakage of the outer side of the synchronous dual-liquid grouting pipe 100. Then, the first pump unit 22 can supply oil to the cleaning water port through the first reversing valve 25. Since the piston rod is locked, the inner side of the synchronous dual-liquid grouting pipe 100 is under high pressure, allowing the second oil outlet to be opened to observe the pressure resistance leakage of the inner side of the synchronous dual-liquid grouting pipe 100.

[0082] Understandably, when conducting a pressure leak test on the outer side of the synchronous dual-liquid grouting pipe 100, oil is continuously supplied to the outer side of the synchronous dual-liquid grouting pipe 100 by the first pump group 22 until the set pressure is reached and then the oil supply stops. At this time, in order to prevent the oil on the outer side of the synchronous dual-liquid grouting pipe 100 from flowing back through the first valve oil circuit, the first valve oil circuit needs to be shut off. That is, during this process, the first control valve 26 is in an energized one-way shut-off state. Similarly, when conducting a pressure leak test on the inner side of the synchronous dual-liquid grouting pipe 100, the third control valve 29 also needs to be in an energized one-way shut-off state.

[0083] For ease of understanding, the following will provide a detailed description of the energization status of each valve unit during the pressure leakage test of the synchronous dual-liquid grouting pipe 100.

[0084] like Figure 5 As shown, when the piston rod is in the outer position of the front end for the pressure test, the action of control terminal YVH01a is "-", the action of control terminal YVH01b is "+", the second directional valve 34 is in the middle position of the cut-off state, the action of control terminal YV01 is "+", the action of control terminal YV02 is "+", and the action of control terminal YV03 is "-".

[0085] When the piston rod is in the inner position of the front end for pressure testing, the action of control terminal YVH01a is "+", the action of control terminal YVH01b is "-", the second directional valve 34 is in the neutral closed state, the action of control terminal YV01 is "-", the action of control terminal YV02 is "+", and the action of control terminal YV03 is "+".

[0086] When the piston rod is in the outer position of the rear end for pressure testing, the action of control terminal YVH01a is "-", the action of control terminal YVH01b is "+", the second directional valve 34 is in the neutral closed state, the action of control terminal YV01 is "+", the action of control terminal YV02 is "+", and the action of control terminal YV03 is "-".

[0087] When the piston rod is in the inner position of the rear end for pressure testing, the action of control terminal YVH01a is "+", the action of control terminal YVH01b is "-", the second directional valve 34 is in the neutral closed state, the action of control terminal YV01 is "-", the action of control terminal YV02 is "+", and the action of control terminal YV03 is "+".

[0088] In this embodiment, there are multiple methods for controlling the conduction of the first oil inlet and the second oil inlet. For ease of understanding, a preferred embodiment will be described in detail below. Figure 1 As shown, the first oil inlet is connected to the grouting port via the fourth control valve 211, and the second oil inlet is connected to the cleaning water inlet via the fifth control valve 212. When performing the wear resistance test of the synchronous dual-liquid grouting pipe 100, both the fourth control valve 211 and the fifth control valve 212 are in the closed state; when performing the pressure leakage test of the synchronous dual-liquid grouting pipe 100, the fourth control valve 211 and the fifth control valve 212 are controlled to open as needed for the test.

[0089] It is understood that the specific structure and working principle of the fourth control valve 211 and the fifth control valve 212 are well known to those skilled in the art, and therefore will not be described in detail here. In this embodiment, the fourth control valve 211 and the fifth control valve 212 are preferably two-position two-way solenoid ball valves. The control terminal of the fourth control valve 211 can be defined as YV04, and the control terminal of the fifth control valve 212 can be defined as YV05. For the control valve, when the control terminal is energized, the control valve is in a one-way cut-off state, and the cut-off direction is always the oil return direction; when the control terminal is de-energized, the control valve is in a two-way conduction state.

[0090] For ease of understanding, the specific actions of the control terminals of the fourth control valve 211 and the fifth control valve 212 during the wear resistance test and pressure leakage test will be described in detail below.

[0091] like Figure 5As shown, during the wear resistance test of the synchronous dual-liquid grouting pipe 100, the action of control terminal YV04 is "+", and the action of control terminal YV05 is "+". When performing the pressure resistance test with the piston rod located on the outer side of the front end, the action of control terminal YV04 is "-", and the action of control terminal YV05 is "+". When performing the pressure resistance test with the piston rod located on the inner side of the front end, the action of control terminal YV04 is "+", and the action of control terminal YV05 is "-". When performing the pressure resistance test with the piston rod located on the outer side of the rear end, the action of control terminal YV04 is "-", and the action of control terminal YV05 is "+". When performing the pressure resistance test with the piston rod located on the inner side of the rear end, the action of control terminal YV04 is "+", and the action of control terminal YV05 is "-".

[0092] It is important to know that during the pressure leakage test of the synchronous dual-liquid grouting pipe 100, the second directional valve 34 needs to be placed in the neutral position for shut-off. As mentioned above, the second directional valve 34 is preferably a Y-type three-position four-way solenoid valve. Therefore, when the second directional valve 34 is switched to the neutral position, the drive cylinder 37 cannot be directly locked by the second directional valve 34. Of course, the type of the second directional valve 34 can also be replaced with an O-type three-position four-way solenoid valve or an M-type three-position four-way solenoid valve to achieve neutral position shut-off. Therefore, for the neutral position shut-off of the second directional valve 34 using the Y-type three-position four-way valve structure, an additional shut-off architecture needs to be designed. For ease of understanding, one specific implementation method will be described in detail below.

[0093] Specifically, such as Figure 1 As shown, the power control system 3 also includes a pair of hydraulically controlled check valves 35; the two hydraulically controlled check valves 35 are respectively installed on two drive branches, and the hydraulically controlled ends of the two hydraulically controlled check valves 35 are respectively connected to the other drive branch. The hydraulically controlled check valves 35 can cut off the backflow to the rod chamber and rodless chamber of the drive cylinder 37 when performing the pressure leakage test of the synchronous dual-liquid grouting pipe 100.

[0094] In this embodiment, the wear coefficient K of the synchronous dual-liquid grouting pipe 100 is calculated based on the data obtained from the wear resistance test. W Based on the data obtained from the pressure leakage test of the synchronous dual-liquid grouting pipe 100, the actual pressure difference ΔP between the two ends of the synchronous dual-liquid grouting pipe 100 is calculated. The formula for calculating the theoretical number of uses T of the synchronous dual-liquid grouting pipe 100 is:

[0095] .

[0096] Where Q represents flow rate, F represents the normal load on the inner cavity of the synchronous dual-liquid grouting pipe 100, i.e. the radial clamping force of the piston rod on the inner wall of the synchronous dual-liquid grouting pipe 100; L represents the wear path, H represents the hardness of the piston rod, A represents the contact area between the piston rod and the inner wall of the synchronous dual-liquid grouting pipe 100, C represents the wear resistance coefficient of the material, W represents the working load, and p represents the fluid density.

[0097] III. Pressure test for nozzle 400.

[0098] like Figure 1 and Figure 5 As shown, the nozzle 400 is connected to the first relief valve 23 and the first directional valve 27 of the first valve oil circuit via a ball valve 24. During the wear resistance test and pressure leakage test of the synchronous dual-liquid grouting pipe 100, the ball valve 24 is in the closed state. After completing the wear resistance test and pressure leakage test of the synchronous dual-liquid grouting pipe 100, when testing the nozzle 400, the ball valve 24 is in the open state, and the first directional valve 27 is switched to the neutral closed state; oil is supplied to the nozzle 400 through the first pump group 22, and the overflow pressure of the first relief valve 23 is adjusted to conduct a pressure test on the nozzle 400.

[0099] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this application. Various changes and modifications can be made to this application without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection claimed by this application is defined by the appended claims and their equivalents.

Claims

1. A test method for a synchronous dual-liquid grouting device, characterized in that, Includes the following steps: The working condition simulation system is connected to the inner cavity of the synchronous dual-liquid grouting pipe, and the power control system is connected to the piston rod of the synchronous dual-liquid grouting pipe. The power control system applies a load to the piston rod, and the working condition simulation system controls the piston rod to reciprocate along the inner cavity to perform the wear resistance test of the synchronous dual-liquid grouting pipe. The piston rod is locked in different positions by the power control system, and pressure oil is output to the inner cavity of the synchronous dual-liquid grouting pipe according to the working condition simulation system to perform the pressure resistance and leakage test of the synchronous dual-liquid grouting pipe. Based on the data obtained from wear resistance tests and pressure leakage tests, the theoretical number of uses of the synchronous dual-liquid grouting pipe is calculated; The synchronous dual-liquid grouting pipe includes a grouting port on the outside, a cleaning water port on the inside, and a mortar port in the middle. When the wear resistance test of the extended piston rod is performed, the working condition simulation system injects oil into the inner cavity of the synchronous dual-liquid grouting pipe through the grouting port; During the extension of the piston rod, if the mortar inlet is not connected to the grouting inlet, the working condition simulation system provides working pressure to the inside of the synchronous dual-liquid grouting pipe through the mortar inlet and the cleaning water inlet; if the mortar inlet is connected to the grouting inlet, the working condition simulation system provides working pressure to the inside of the synchronous dual-liquid grouting pipe through the cleaning water inlet. When the wear resistance test of the piston rod retraction is performed, if the mortar port and the grouting port are connected, the working condition simulation system injects oil into the inner cavity of the synchronous dual-liquid grouting pipe through the cleaning water port, and the working condition simulation system provides working pressure to the outside of the synchronous dual-liquid grouting pipe through the mortar port and the grouting port. If the mortar inlet is not connected to the grouting inlet, the working condition simulation system injects oil into the inner cavity of the synchronous dual-liquid grouting pipe through the cleaning water inlet and the mortar inlet, and the working condition simulation system provides working pressure to the outside of the synchronous dual-liquid grouting pipe through the grouting inlet. A first, controllable oil outlet is provided at the grouting port, and a second, controllable oil outlet is provided at the cleaning water outlet; The pressure leakage test for the synchronous dual-liquid grouting pipe includes the following procedures: Move the piston rod to the front end near the grouting port and lock it in position, while simultaneously shutting off the mortar inlet; The working condition simulation system supplies oil through the grouting port, and then obtains the pressure leakage volume outside the synchronous dual-liquid grouting pipe through the first oil intake port that is in the conduction state. The working condition simulation system supplies oil through the cleaning water inlet, and then obtains the pressure leakage inside the synchronous dual-liquid grouting pipe through the second oil inlet that is in the conduction state. Move the piston rod to the rear end near the cleaning water outlet and lock it in place to keep the mortar outlet closed; The working condition simulation system supplies oil through the grouting port, and then obtains the pressure leakage volume outside the synchronous dual-liquid grouting pipe through the first oil intake port that is in the conduction state. The operating condition simulation system supplies oil through the cleaning water inlet, and then obtains the pressure leakage volume inside the synchronous dual-liquid grouting pipe through the second oil inlet that is in the conduction state.

2. The test method for the synchronous dual-liquid grouting device as described in claim 1, characterized in that, The operating condition simulation system includes a first oil tank, a first pump set, a first reversing valve, and three valve oil circuits; the first ends of the three valve oil circuits are respectively connected to the grouting port, the mortar port, and the cleaning water port, and the second ends of the three valve oil circuits are all connected to the first oil tank; the input end of the first pump set is connected to the first oil tank, and the output end of the first pump set is connected to the valve oil circuits connecting the grouting port and the cleaning water port through the first reversing valve; When the wear resistance test of the extended piston rod is performed, the first pump set supplies oil to the grouting port, and the valve oil circuit connected to the mortar port and the cleaning water port is used to provide working pressure; when the wear resistance test of the retracted piston rod is performed, the valve oil circuit connected to the grouting port and the mortar port is used to provide working pressure. When a pressure leakage test is performed, the valve oil circuit connected to the mortar inlet is shut off to drain oil; depending on the location of the pressure leakage test, the first pump set switches the position of the first reversing valve to supply oil to the grouting port or the cleaning water port.

3. The test method for the synchronous dual-liquid grouting device as described in claim 2, characterized in that, Each valve circuit includes a connected control valve and a relief valve; the relief valve is used to provide working pressure when performing wear resistance testing, and the control valve is used to control the opening or closing of the valve circuit; the first reversing valve is disposed between the control valve and the relief valve in the valve circuit connecting the grouting port and the cleaning water port.

4. The test method for the synchronous dual-liquid grouting device as described in claim 3, characterized in that, The valve oil circuit connected to the mortar inlet and the cleaning water inlet also includes a check valve; One end of the one-way valve is connected between the control valve and the overflow valve, and the other end of the one-way valve is connected to the first oil tank; the conduction direction of the one-way valve is towards the synchronous dual-liquid grouting pipe; During the wear resistance test of the piston rod retraction, the one-way valve is opened to balance the pressure on the inside of the synchronous dual-liquid grouting pipe.

5. The test method for the synchronous dual-liquid grouting device as described in claim 3, characterized in that, The nozzle is connected via a ball valve between the overflow valve and the first reversing valve in the valve oil circuit connected to the grouting port; When performing wear resistance and pressure leakage tests, the ball valve is in the closed state; when performing tests on the nozzle, the ball valve is in the open state, and the first directional valve is switched to the closed state. The pressure test of the nozzle is performed by supplying oil to the nozzle through the first pump set and adjusting the overflow pressure of the overflow valve of the valve oil circuit connected to the grouting port.

6. The test method for the synchronous dual-liquid grouting device as described in any one of claims 1-5, characterized in that, The power control system includes: Second fuel tank; The second pump unit; the input end of the second pump unit is connected to the second oil tank; The drive cylinder; the output end of the drive cylinder is connected to the piston rod; and The second reversing valve; the two ports on the first side of the second reversing valve are respectively connected to the output end of the second pump group and the second oil tank, and the two ports on the second side of the second reversing valve are respectively connected to the rod chamber and the rodless chamber of the driving cylinder through the drive branch; The second reversing valve is adapted to control the output end of the drive cylinder to reciprocate during the wear resistance test of the synchronous dual-liquid grouting pipe; the second reversing valve is adapted to cut off the rod chamber and rodless chamber of the drive cylinder during the pressure leakage test of the synchronous dual-liquid grouting pipe.

7. The test method for the synchronous dual-liquid grouting device as described in claim 6, characterized in that, The power control system also includes a pair of hydraulically controlled check valves and a pair of throttle valves; The two hydraulically controlled check valves are respectively installed on the two drive branches, and the hydraulically controlled ends of the two hydraulically controlled check valves are respectively connected to the other drive branch opposite to each other; the hydraulically controlled check valves are adapted to cut off the rod chamber and rodless chamber of the drive cylinder when performing the pressure leakage test of the synchronous dual-liquid grouting pipe; The two throttle valves are respectively installed in the two drive branches; During the wear resistance test of the synchronous dual-liquid grouting pipe, the working speed of the drive cylinder is adjusted by adjusting the opening of the throttle valve.

8. The test method for the synchronous dual-liquid grouting device as described in claim 1, characterized in that, Based on the data obtained from the wear resistance test of the synchronous dual-liquid grouting pipe, the wear coefficient K of the synchronous dual-liquid grouting pipe is calculated. W ; Based on the data obtained from the pressure leakage test of the synchronous dual-liquid grouting pipe, the actual pressure difference between the two ends of the synchronous dual-liquid grouting pipe is calculated. P; The formula for calculating the theoretical number of uses T of the synchronous dual-liquid grouting pipe is as follows: ； Where Q represents flow rate, F represents normal load, L represents wear path, H represents hardness, A represents contact area, C represents material wear resistance coefficient, W represents working load, and p represents fluid density.

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