Portable drawing experiment device

Abstract

The invention discloses a portable drawing experiment device, which is used for testing the anchoring performance of a mechanical anchor bolt in concrete, and comprises an integrated control box with rollers at the bottom and an annular support frame with a handle, and a micro hydraulic pump station and an electric control module are integrated in the integrated control box. When the integrated control box is used, the hydraulic oil cylinder in the integrated control box is taken out and connected with the annular supporting frame through bolts to form a drawing execution frame, an oil conveying pipe is connected with the hydraulic oil cylinder, and a rapid connector of a displacement sensor cable is rapidly connected with the controller wiring panel in a butt joint mode. The connection of a circuit and a hydraulic oil circuit is completed, the device is assembled, then the mechanical anchor bolt is clamped by a drawing clamp at the end part of the piston rod, and the device is started through a human-computer interaction interface to carry out a drawing experiment. Therefore, the core components of the device are highly integrated, and the device is easy to carry, transfer, assemble and store, and can meet the use requirements of field high-frequency tests.

Description

Technical Field

[0001] This application relates to the technical field of building engineering quality testing equipment, specifically to a portable pull-out test device for testing the anchoring performance of mechanical anchor bolts in concrete. Background Technology

[0002] In the acceptance and routine inspection of mechanical anchors in the construction industry, pull-out force testing of mechanical anchors in concrete substrates is a routine and frequent on-site operation. Traditional pull-out testing devices typically consist of separate hydraulic pump stations, cylinders, support frames, and measuring instruments, which have the following significant drawbacks: 1. The components are scattered, making on-site assembly cumbersome and inefficient; 2. The overall size and weight are large and heavy, making handling and movement inconvenient, especially unsuitable for use in narrow or high-altitude work areas; 3. The loading, pressure holding, and data recording during the testing process are highly dependent on manual operation, making it difficult to guarantee accuracy and consistency, and the level of automation is low.

[0003] Chinese invention patent CN116499885A discloses an anchor bolt pull-out performance testing device, whose hardware architecture includes a manual pump, a hollow jack, and a data acquisition instrument (computer), which are connected by a hose and a signal line. Although it achieves automatic data acquisition compared to traditional mechanical pressure gauge pull-out testers, it still has the following drawbacks:

[0004] 1. Although the parts can be put into a suitcase, the on-site assembly work is huge, prone to errors and time-consuming.

[0005] 2. The loading rate is entirely dependent on the operator's cranking speed when using a manual hydraulic pump. Different people, or even the same person at different times, may not be able to maintain a consistent loading speed. For testing standards that require strict speed control, this will directly affect the scientific validity and comparability of the pull-out force-displacement curve.

[0006] 3. Although data acquisition is achieved, the control is still manual (manual pressurization and monitoring displacement to stop). It does not have "closed-loop control" capability, that is, it cannot automatically adjust the pressure according to the preset loading rate.

[0007] Therefore, although the solutions disclosed in the aforementioned patent documents can achieve automatic data collection and improve the automation level of the equipment to a certain extent, they still suffer from problems such as cumbersome on-site assembly, inconvenient transportation, and difficulty in ensuring test consistency, making it difficult to meet the needs of high-frequency on-site testing. Therefore, it is necessary to propose a new technical solution to address the problems existing in the prior art. Summary of the Invention

[0008] This application provides a portable pull-out testing device to solve the problems of existing pull-out testing devices, such as cumbersome assembly, inconvenient transportation, and difficulty in ensuring test consistency, which makes it difficult to meet the needs of high-frequency on-site testing.

[0009] To achieve the above objectives, this application provides the following technical solution:

[0010] This application provides a portable pull-out testing device, comprising an integrated control box with wheels mounted on the bottom and a pull-out actuator with a handle, wherein:

[0011] The integrated control box houses a miniature hydraulic pump station and an electrical control module within its box-shaped enclosure. The miniature hydraulic pump station includes a hydraulic pump, a drive motor for rotating the hydraulic pump, an oil tank connected to the inlet of the hydraulic pump, and a directional valve connected to the outlet of the hydraulic pump. The directional valve is connected to two oil supply pipes for connecting to hydraulic cylinders. The electrical control module includes a main unit and a controller. The box-shaped enclosure is equipped with a controller wiring panel and a human-machine interface.

[0012] The pulling actuator includes a hydraulic cylinder and an annular support frame detachably connected to the bottom output end of the hydraulic cylinder. The piston rod of the hydraulic cylinder extends vertically downward, and a pulling clamp is installed on the piston rod. The rod chamber and rodless chamber of the hydraulic cylinder are respectively provided with oil delivery interfaces that match the oil delivery pipe. The hydraulic cylinder has a built-in displacement sensor, and the end of the cable of the displacement sensor is provided with a quick interface adapted to the controller wiring panel.

[0013] The hydraulic cylinder, after being separated from the annular support frame, can be housed in the box-shaped outer shell, and a handle is provided on the annular support frame.

[0014] Furthermore, in the above technical solution, the displacement sensor is a magnetostrictive displacement sensor, used to directly detect the displacement of the piston rod.

[0015] Furthermore, pressure sensors are installed on the hydraulic lines of the directional valve and the hydraulic cylinder to detect the working pressure of the cylinder, and the pressure sensors are electrically connected to the controller.

[0016] Furthermore, the pressure sensor is located within the box-shaped housing.

[0017] Furthermore, the human-computer interaction interface is located on the top of the box-shaped outer shell.

[0018] Furthermore, the controller wiring panel is located on the side of the enclosure.

[0019] Furthermore, the casters at the bottom of the box-shaped outer casing are omnidirectional wheels with brakes.

[0020] Furthermore, the human-machine interface is a touch screen embedded in the top of the box-shaped shell. The touch screen is electrically connected to the host machine and is used to set experimental parameters, start / stop the experiment, and display the force-displacement curve and test results in real time.

[0021] Furthermore, the annular support frame includes a top connecting plate and multiple support arms. The top connecting plate is fixedly connected to the bottom flange of the hydraulic cylinder by bolts. The top connecting plate has a clearance hole that allows the piston rod to pass through vertically. The multiple support arms are arranged radially downward and outward from the lower surface of the top connecting plate, and each support arm is provided with a handle.

[0022] Furthermore, the annular support frame also includes a bottom ring that is spaced parallel to the top connecting plate, and the bottom of the support arm is connected to the bottom ring.

[0023] Furthermore, the host computer is an industrial control computer, and the controller is a programmable logic controller or a microcontroller.

[0024] Furthermore, the end of the piston rod is provided with a threaded joint for connecting to the pull-out clamp.

[0025] Furthermore, the quick-connect interface is a flange bolt interface, a snap-fit ​​interface, or a turn-lock interface.

[0026] Furthermore, the outer wall of the integrated control box is provided with a pull rod or pull ring for easy pushing and pulling.

[0027] Compared with the prior art, this application has at least the following beneficial effects:

[0028] 1. This application integrates the power, execution, support, and control units into a compact and portable whole through a highly integrated structural design. Specifically, it includes an integrated control box with wheels at the bottom and a ring support frame with a handle. The integrated control box integrates a micro hydraulic pump station and an electrical control module. The box shell is equipped with a controller wiring panel and a human-machine interface. In use, the hydraulic cylinder in the integrated control box is taken out and bolted to the ring support frame to form a pulling execution frame. The oil supply pipe is connected to the hydraulic cylinder, and the quick interface of the displacement sensor cable is quickly connected to the controller wiring panel to complete the connection of the circuit and hydraulic oil circuit. After the device is assembled, the mechanical anchor bolt pre-embedded in the concrete test block is clamped by the pulling clamp at the end of the piston rod. The pulling test can be carried out by starting the device through the human-machine interface. The pull-out testing device provided in this application integrates core components into a pulley housing and employs a lightweight support frame that allows for quick assembly and disassembly, making the entire device easy to transport, move, and store, especially suitable for use in complex construction sites. Furthermore, the highly integrated structure and quick-access interface design eliminate cumbersome piping connections and instrument assembly steps, improving operational efficiency. Moreover, the application uses an electronic control module to automatically control the experimental process and record data, ensuring good test consistency, eliminating human error, and guaranteeing the objectivity and traceability of test results. Therefore, this application features a simple structure, is easy to move and assemble, and has high operational efficiency, meeting the needs of high-frequency on-site testing.

[0029] 2. This application features casters with brakes at the bottom of the integrated control box, allowing operators to easily move the integrated control box to any test point, greatly reducing the difficulty of handling it over long distances or on complex road conditions. Meanwhile, the ring support frame is an independently designed lightweight truss structure with a dedicated handle, allowing operators to lift it with one hand for precise positioning, realizing a rapid positioning mode that integrates single-person operation, transportation, and on-site operation.

[0030] 3. This application employs a built-in displacement sensor and houses the pressure sensor within a box-type casing. Both the displacement and pressure sensors are integrated with the controller and operating host in the electronic control module, forming a closed-loop control system. During testing, the controller automatically controls the reversing valve and drive motor according to preset parameters (such as loading rate and target load), achieving precise constant-speed loading and completely eliminating the loading curve fluctuations and human errors caused by uneven manual operation rates in traditional manual hydraulic pumps. Simultaneously, the data collected by the sensors in real time is automatically recorded, processed, and used by the operating host to generate a force-displacement curve. The results are automatically determined after the test, eliminating the need for manual observation of instrument readings and manual recording of peak values. This automated process not only ensures a high degree of consistency in loading conditions between multiple tests, resulting in better scientific comparability of the experimental data, but also effectively avoids the lag in manual readings and recording errors, significantly improving the accuracy and objectivity of the test results.

[0031] 4. The directional valve in the miniature hydraulic pump station of this application can be controlled to automatically switch the oil circuit and reset the oil cylinder after a single test, immediately entering the preparation state for the next test. The standardized automatic reset process shortens the test interval and ensures that the initial state of each test is consistent, thereby meeting the actual needs of the construction industry for high-frequency and high-efficiency batch testing of anchor bolts on site. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the embodiments will be briefly described below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. It should be understood that the specific shapes and structures shown in the drawings should not generally be regarded as limiting conditions for implementing this application. For example, based on the technical concepts disclosed in this application and the exemplary drawings, those skilled in the art are able to easily make conventional adjustments or further optimizations to the addition / reduction / classification, specific shapes, positional relationships, connection methods, and size ratios of certain units (components).

[0033] Figure 1 This is a schematic diagram of the structure of the portable pull-out test device provided in this application in an assembled state, as shown in one embodiment.

[0034] Explanation of reference numerals in the attached figures:

[0035] 1. Integrated control box;

[0036] 2. Hydraulic cylinder; 21. Piston rod; 22. Pulling clamp; 23. Displacement sensor cable;

[0037] 3. Circular support frame; 31. Top connecting plate; 32. Support arm; 321. Handle; 33. Bottom ring. Detailed Implementation

[0038] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0039] In the description of this application: unless otherwise stated, "a plurality of" means two or more. The terms "first," "second," etc., in this application are intended to distinguish the objects referred to and do not have any special meaning in terms of technical connotation (e.g., they should not be construed as an emphasis on importance or order). Expressions such as "including," "comprising," and "having" also mean "not limited to" (certain units, components, materials, steps, etc.).

[0040] The terms used in this application, such as "upper," "lower," "left," "right," and "middle," are generally used to facilitate intuitive understanding by referring to the accompanying drawings, and are not absolute limitations on the positional relationships in the actual product. Changes in these relative positional relationships, without departing from the technical concept disclosed in this application, should also be considered within the scope of this application.

[0041] To address the problems existing in the prior art, this application provides a portable pull-out testing device, which is highly integrated, easy to carry, and intelligently and simply operated, thereby improving on-site testing efficiency and data reliability. The structure and usage of this portable pull-out testing device are described in detail below with reference to specific embodiments.

[0042] This application provides a portable pull-out testing device, including an integrated control box 1 with rollers mounted on the bottom and a pull-out actuator with a handle 321.

[0043] The integrated control box 1 houses a miniature hydraulic pump station and an electrical control module within its box-type enclosure. The miniature hydraulic pump station includes a hydraulic pump, a drive motor for rotating the hydraulic pump, an oil tank connected to the inlet of the hydraulic pump, and a directional valve connected to the outlet of the hydraulic pump. The directional valve is connected to two oil supply pipes for connecting to the hydraulic cylinder 2. The electrical control module includes a host computer and a controller. The box-type enclosure is equipped with a controller wiring panel and a human-machine interface.

[0044] like Figure 1 The pulling actuator includes a hydraulic cylinder 2 and an annular support frame 3 detachably connected to the bottom output end of the hydraulic cylinder 2. The piston rod 21 of the hydraulic cylinder 2 extends vertically downward, and a pulling clamp 22 is installed on the piston rod 21. The rod chamber and rodless chamber of the hydraulic cylinder 2 are respectively provided with oil supply interfaces that match the oil supply pipe. The hydraulic cylinder 2 has a built-in displacement sensor, and the end of the displacement sensor cable is provided with a quick interface that is compatible with the controller wiring panel.

[0045] The hydraulic cylinder 2, after being separated from the annular support frame 3, can be stored in a box-type outer shell, and a handle 321 is provided on the annular support frame 3.

[0046] This application integrates a miniature hydraulic pump station, controller, data acquisition instrument, and operating host into a single, movable cabinet, forming an integrated control unit. A ring-shaped support frame 3 supports the hydraulic cylinder 2 above the tested mechanical anchor bolt; this frame is a truss structure that allows for quick detachment from the hydraulic cylinder 2. The sensor cable on the hydraulic cylinder 2 can be connected to the controller's wiring panel via a quick-connect interface. Therefore, this application, through a highly integrated structural design, integrates the power, execution, support, and control units into a compact and portable whole, enabling rapid on-site deployment and one-button intelligent operation, significantly improving the efficiency and convenience of pull-out tests.

[0047] In a preferred embodiment of this application, the directional control valve is a three-position four-way solenoid directional control valve with two working ports, designated as the first working port (Port A) and the second working port (Port B). Port A is connected to the first oil supply pipe, and Port B is connected to the second oil supply pipe. Ports A and B can be selectively connected to the outlet port (Port P) or return port (Port T) of the hydraulic pump via the valve core inside the directional control valve. The first working port of the directional control valve is connected to the rodless chamber port of the hydraulic cylinder 2 via the first oil supply pipe; the second working port of the directional control valve is connected to the rod chamber port of the hydraulic cylinder 2 via the second oil supply pipe.

[0048] Under the pulling condition (piston rod 21 retracts, applying tension to the anchor bolt): the controller controls the reversing valve to switch to the first working position, and the pressure oil output by the hydraulic pump enters the rodless chamber of the oil cylinder through port P → port A → first oil supply pipe. The hydraulic oil in the rod chamber is squeezed by the piston and flows back to the oil tank through the second oil supply pipe → port B of the reversing valve → port T.

[0049] In the reset condition (piston rod 21 extends, ready for the next test): the controller controls the reversing valve to switch to the second working position. The pressure oil output by the hydraulic pump enters the rod chamber of the oil cylinder through port P → port B → second oil supply pipe. The hydraulic oil in the rodless chamber is squeezed by the piston and flows back to the oil tank through the first oil supply pipe → port A of the reversing valve → port T.

[0050] In a preferred embodiment of this application, the box-type outer shell is made of aluminum alloy, and a human-machine interface is provided on its top. The human-machine interface is a touch screen embedded in the top of the box-type outer shell. Operators can naturally view and operate the screen while standing, without bending over or squatting, making it particularly suitable for frequent on-site testing scenarios, thus improving ease of use and comfort. For protection, a protective cover can also be provided for the touch screen.

[0051] In a preferred embodiment of this application, the bottom of the box-type outer shell is equipped with universal wheels with brakes. After reaching the predetermined position, stepping on the brakes will firmly fix the box body, preventing displacement due to accidental collisions during the test and ensuring the overall stability of the equipment during the test.

[0052] In a preferred embodiment of this application, a controller wiring panel is provided on the side of the enclosure, through which all control signals enter and exit. Therefore, this application concentrates all external interfaces (including power supply, signal output, etc.) on the side, resulting in a neat wiring layout and avoiding messy, tangled cables.

[0053] In a preferred embodiment of this application, the displacement sensor is a magnetostrictive displacement sensor built into the hydraulic cylinder 2, used to directly detect the displacement of the piston rod 21. The magnetostrictive sensor has advantages such as non-contact measurement, high resolution, high linearity, and strong anti-interference capability. By embedding it in or directly mounting it on the cylinder, the absolute displacement of the piston rod 21 can be obtained in real time and accurately, avoiding measurement errors caused by mechanical wear, installation deviations, or on-site impacts of external wire-type or photoelectric sensors. This provides accurate feedback signals for closed-loop control, thereby ensuring the authenticity and reliability of the force-displacement curve.

[0054] In a preferred embodiment of this application, a pressure sensor is installed on the hydraulic pipeline connecting the directional valve and the hydraulic cylinder 2 to detect the working pressure of the cylinder. The pressure sensor is electrically connected to the controller. The host computer is an industrial control computer used to run the control software and operating system. The touch screen is used to set experimental parameters, start / stop the experiment, and display the force-displacement curve and test results in real time.

[0055] In this application, the pressure sensor directly detects the real-time oil pressure in the working chamber of the hydraulic cylinder, and the pulling force value can be obtained through conversion. Placing the sensor on the pipeline close to the hydraulic cylinder minimizes the impact of pressure loss along the pipeline on measurement accuracy. The pressure sensor is electrically connected to the controller, allowing the force signal to be acquired in real time and used for closed-loop control (such as constant speed loading). It also provides an accurate data source for automatically recording peak values ​​and plotting force-displacement curves. Simultaneously, the displacement sensor and pressure sensor together form a complete sensing layer. The controller can precisely adjust the actions of the reversing valve and drive motor by comparing the feedback values ​​of displacement and pressure in real time according to the preset target loading rate, thereby achieving fully automatic and highly consistent pull-out testing and completely eliminating subjective errors from manual operation.

[0056] In this application, the pressure sensor is integrated into a box-type housing, effectively preventing damage from impacts during handling or testing, and improving the durability and reliability of the equipment. At the same time, the built-in design reduces the number of field wires, further simplifying the deployment process.

[0057] In this application, compared with ordinary computers, industrial control computers have stronger resistance to shock, dust, and high and low temperatures, making them more suitable for harsh environments such as construction sites.

[0058] In a preferred embodiment of this application, the annular support frame 3 includes a top connecting plate 31 and multiple support arms 32. The top connecting plate 31 is bolted to the bottom flange of the hydraulic cylinder 2. The top connecting plate 31 has pre-drilled clearance holes to allow the piston rod 21 to pass vertically through. The multiple support arms 32 are arranged radially downwards and outwards from the lower surface of the top connecting plate 31, and each support arm 32 is equipped with a handle 321. The radial structure is similar to a tripod or quadruped, providing excellent geometric stability. This layout can evenly transmit the enormous pulling reaction force generated by the hydraulic cylinder 2 to the ground, effectively preventing the equipment from tipping over. Simultaneously, the outwardly extending support arms 32 increase the support span, enabling it to maintain horizontal stability even on uneven ground (such as rough concrete or gravel base).

[0059] In other embodiments, bottom rings 33 can be arranged parallel to each other below the top connecting plate 31. The bottoms of all support arms 32 are welded to the bottom rings 33, and the central hole of the bottom rings 33 forms a receiving space for the mechanical anchor to be tested. The bottom rings 33 connect the bottoms of all support arms 32 into a whole, forming a closed ring frame. This significantly enhances the torsional resistance and overall rigidity of the support frame, prevents the support arms 32 from swinging or deforming relative to each other under stress, and further improves the structural stability during the test.

[0060] In a preferred embodiment of this application, the annular support frame 3 employs three or four foldable support arms 32, which are welded to a bottom ring 33, which is circular. When unfolded, the support arms 32 form a stable radial shape to adapt to uneven ground and ensure horizontal support.

[0061] In a preferred embodiment of this application, the end of the piston rod 21 is provided with a threaded connector for connecting to the pull-out clamp 22. Various pull-out clamps 22 (such as jaw type, through-hole type, and self-locking type) can be prepared in advance for different specifications of anchor bolts (different diameters, different clamping methods). On-site, the corresponding clamp is simply screwed onto the end of the piston rod 21 without the need for special tools, enabling rapid replacement of the actuator end and adapting to diverse testing needs.

[0062] In a preferred embodiment of this application, the end of the displacement sensor cable is provided with a quick-connect interface adapted to the controller wiring panel. The quick-connect interface is a flange bolt interface, a snap-fit ​​interface, or a turn-lock interface.

[0063] In a preferred embodiment of this application, the outer wall of the integrated control box 1 is provided with a pull rod or pull ring for easy pushing and pulling. By adding a pull rod or pull ring to the existing casters at the bottom, the movement of the control box is upgraded from a simple "push / pull" mechanism to a "tow" mode similar to that of a suitcase. Operators can easily drag the control box long distances across the construction site without bending over, making it particularly suitable for rapid relocation on flat surfaces, further reducing labor intensity and improving the equipment's adaptability to various handling scenarios.

[0064] The operation and use process of the portable pull-out testing device provided in this application is as follows:

[0065] 1. Handling and Deployment: Move the integrated control box with casters at the bottom to the test point.

[0066] 2. Install the support frame: Push the piston rod of the hydraulic cylinder down through the clearance hole in the middle of the annular support frame so that its end flange contacts the top connecting plate of the support frame, and fix the cylinder flange to the top connecting plate with bolts.

[0067] 3. Connect the hydraulic oil circuit and sensor circuit: Connect the two oil supply pipes on the directional valve to the oil supply interfaces on the rod chamber and rodless chamber of the hydraulic cylinder, respectively, and connect the cable of the displacement sensor to the controller wiring panel.

[0068] 4. Connect the test piece: Screw the pull clamp onto the end of the piston rod and clamp the mechanical anchor bolt embedded in the concrete test block.

[0069] 5. Intelligent Testing: Set experimental parameters (such as loading rate, target load, etc.) via the touch screen on the top of the integrated control box, and click "Start". The device automatically completes loading, pressure holding, and data acquisition (real-time plotting of force-displacement curves), and automatically judges the results and generates a report.

[0070] Compared with the prior art, the portable pull-out testing device provided in this application has at least the following advantages:

[0071] 1. Extreme portability: By highly integrating the core components into the wheeled housing and using a lightweight support frame that can be quickly disassembled, the entire set of equipment is easy to move, transfer and store, making it particularly suitable for use in complex construction sites.

[0072] 2. High operational efficiency: It eliminates the cumbersome pipe connections and instrument assembly steps. Through quick interfaces and integrated design, it can be used "out of the box". A single person can complete the test preparation in a few minutes.

[0073] 3. Intelligent and accurate: The integrated electronic control system automatically controls the experimental process and records data, eliminating human error and ensuring the objectivity and traceability of test results.

[0074] 4. Compact structure and high reliability: The integrated design reduces exposed pipes and lines, lowers the risk of equipment damage during handling and use, and improves overall reliability.

[0075] Therefore, the portable pull-out testing device provided in this application integrates the hydraulic pump station and electrical control module into a box-type housing with casters. Through a highly integrated and compact design, it solves the problems of scattered components, cumbersome handling, and complicated operation of traditional pull-out instruments, achieving portability, rapid deployment, and intelligent testing. It is particularly suitable for mobile testing operations at construction sites. In addition, the device has a simple overall structure, is easy to assemble and use, has high operating efficiency, can stably control the testing process, can precisely control the testing rate, automatically determine failure, and can achieve dynamic load holding function. The electrical control system, power system, and actuators are highly integrated, enabling flexible movement and simultaneously meeting the needs of anchorage bearing capacity and displacement testing in laboratories and engineering sites.

[0076] The technical features of the above embodiments can be combined in any way (as long as there is no contradiction in the combination of these technical features). For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described; these embodiments not explicitly written should also be considered to be within the scope of this specification.

[0077] The present application has been described in a relatively specific and detailed manner above through general descriptions and specific embodiments. It should be understood that, based on the technical concept of the present application, several conventional adjustments or further innovations can be made to these specific embodiments; however, as long as they do not depart from the technical concept of the present application, the technical solutions obtained by these conventional adjustments or further innovations also fall within the protection scope of the claims of the present application.

Claims

1. A portable pull-out test device, characterized in that, Includes an integrated control box with casters mounted on the bottom and a pull-out actuator with a handle, wherein: The integrated control box houses a miniature hydraulic pump station and an electrical control module within its box-shaped enclosure. The miniature hydraulic pump station includes a hydraulic pump, a drive motor for rotating the hydraulic pump, an oil tank connected to the inlet of the hydraulic pump, and a directional valve connected to the outlet of the hydraulic pump. The directional valve is connected to two oil supply pipes for connecting to hydraulic cylinders. The electrical control module includes a main unit and a controller. The box-shaped enclosure is equipped with a controller wiring panel and a human-machine interface. The pulling actuator includes a hydraulic cylinder and an annular support frame detachably connected to the bottom output end of the hydraulic cylinder. The piston rod of the hydraulic cylinder extends vertically downward, and a pulling clamp is installed on the piston rod. The rod chamber and rodless chamber of the hydraulic cylinder are respectively provided with oil delivery interfaces that match the oil delivery pipe. The hydraulic cylinder has a built-in displacement sensor, and the end of the cable of the displacement sensor is provided with a quick interface adapted to the controller wiring panel. The hydraulic cylinder, after being separated from the annular support frame, can be housed in the box-shaped outer shell, and a handle is provided on the annular support frame.

2. The portable pull-out test apparatus according to claim 1, characterized in that, The displacement sensor is a magnetostrictive displacement sensor, used to directly detect the displacement of the piston rod; Pressure sensors are installed on the hydraulic lines of the directional valve and the hydraulic cylinder to detect the working pressure of the cylinder. The pressure sensors are electrically connected to the controller.

3. The portable pull-out test apparatus according to claim 2, characterized in that, The pressure sensor is located inside the box-shaped housing; The human-computer interaction interface is located on the top of the box-shaped shell; The controller wiring panel is located on the side of the enclosure; The wheels at the bottom of the box-type outer shell are omnidirectional wheels with brakes.

4. The portable pull-out test apparatus according to claim 2, characterized in that, The human-machine interface is a touch screen embedded in the top of the box-shaped shell. The touch screen is electrically connected to the host machine and is used to set experimental parameters, start / stop the experiment, and display the force-displacement curve and test results in real time.

5. The portable pull-out test apparatus according to claim 1, characterized in that, The annular support frame includes a top connecting plate and multiple support arms. The top connecting plate is fixedly connected to the bottom flange of the hydraulic cylinder by bolts. The top connecting plate has a clearance hole that allows the piston rod to pass through vertically. The multiple support arms are arranged radially downward and outward from the lower surface of the top connecting plate, and each support arm is provided with a handle.

6. The portable pull-out test apparatus according to claim 5, characterized in that, The annular support frame also includes a bottom ring that is spaced parallel to the top connecting plate, and the bottom of the support arm is connected to the bottom ring.

7. The portable pull-out test apparatus according to claim 1, characterized in that, The host computer is an industrial control computer, and the controller is a programmable logic controller or a microcontroller.

8. The portable pull-out test apparatus according to claim 1, characterized in that, The piston rod has a threaded connector at its end for connecting to a pull-out clamp.

9. The portable pull-out test apparatus according to claim 1, characterized in that, The quick-connect interface is a flange bolt interface, a snap-fit ​​interface, or a turn-lock interface.

10. The portable pull-out test apparatus according to claim 1, characterized in that, The outer wall of the integrated control box is equipped with a pull rod or pull ring for easy pushing and pulling.

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