A kind of pull-out test device for measuring anchorage force of end hook steel fiber end hook

Abstract

The application discloses a kind of measuring end hook steel fiber end hook anchoring force pull-out test device, it is related to fiber pull-out test device technical field, including testing machine, the bearing seat of being installed to the upper and lower two sides in testing machine interior, the surface of bearing seat is equipped with several metal measuring pieces, the surface of metal measuring piece is equipped with the hole for positioning end hook steel fiber, the device of being provided, can measure the anchoring force at the end hook of end hook steel fiber without pouring matrix, and can obtain the relationship between anchoring force and fiber pull-out displacement according to real-time displacement change, and can eliminate the friction and adhesive force of end hook steel fiber and matrix, measure only rely on the anchoring force provided by end hook deformation, simultaneously can be measured different diameter, different length and different end hook bending frequency end hook steel fiber anchoring force by selecting metal measuring piece with different aperture diameter and different quantity of metal measuring piece.

Description

Technical Field

[0001] This invention relates to the field of fiber pull-out testing equipment, and in particular to a pull-out testing equipment for determining the end hook anchoring force of steel fiber. Background Technology

[0002] Ordinary concrete is widely used in construction projects due to its low cost, ease of molding, and high durability. However, it has drawbacks such as susceptibility to cracking and poor ductility. Adding steel fibers to concrete can improve its mechanical properties. Among commonly used fibers in engineering, hooked steel fibers, due to fiber deformation at the hooks during extraction from the matrix, can effectively exert their reinforcing effect.

[0003] During the process of steel fiber being pulled out of the matrix, the pull-out resistance of the end-hook steel fiber includes not only the bonding and friction between the steel fiber and the matrix, but also the anchoring effect of the end hook. Therefore, measuring the anchoring effect provided by the end hook of the end-hook steel fiber during the pull-out of the steel fiber is of great significance for maximizing the reinforcing effect of the steel fiber. Different end hook shapes provide different anchoring forces. Therefore, measuring the anchoring effect of the end hook of steel fiber with different end hook shapes can determine which shape of end-hook steel fiber has better pull-out resistance. Thus, a pull-out test device for measuring the end hook anchoring force of end-hook steel fiber is proposed. Summary of the Invention

[0004] The purpose of this invention is to solve the above-mentioned problems and provide a device for measuring the anchoring force of steel fiber end hooks that is simple in structure, easy to operate, highly accurate, and reliable. The invention adopts the following technical solution: A pull-out test device for determining the end hook anchoring force of steel fiber end hooks includes a testing machine and a support base installed on the upper and lower sides inside the testing machine. A plurality of metal measuring plates are installed on the surface of the support base. The surface of the metal measuring plates has holes for positioning the end hook steel fibers. The two ends of the end hook steel fibers are respectively housed in the upper and lower metal measuring plates. A positioning component is provided on the surface of the support base. The metal measuring plates are located between the positioning component and the support base. One end of the end hook steel fiber is respectively housed in the upper and lower metal measuring plates.

[0005] Preferably, the hole is located at the center of the surface of the metal measuring plate, and its diameter matches the diameter of the end hook steel fiber. Grooves with the same diameter as the end hook steel fiber are formed on both sides of the metal measuring plate. The end hook steel fiber is slidably installed inside the groove, and auxiliary positioning steel fiber is installed inside the groove.

[0006] Preferably, the positioning component includes an L-shaped connecting plate that is closely attached to the four corners of the surface of the metal measuring piece, and the surface of the support base is provided with an adjustment groove for sliding the L-shaped connecting plate. A pressure plate is rotatably connected to the upper surface of the L-shaped connecting plate on the opposite side through a hinge seat.

[0007] Preferably, positioning grooves are provided on the side surfaces of both pressure plates, and insert plates are slidably connected inside the positioning grooves. A return spring is installed on the side surface of one of the insert plates, and the return spring is fixedly installed on the inner side wall of the positioning groove. A first sliding groove is provided on the upper surface of one of the positioning grooves, and a pull rod that is slidably connected inside the first sliding groove is fixedly installed on the surface of the insert plate.

[0008] Preferably, a sliding frame is fixedly installed on the lower surface of the L-shaped connecting plates on both sides, and an adjusting threaded rod is threaded through the surface of the sliding frame. A belt pulley transmission module is installed on the top of the adjusting threaded rod on both sides through a locking pin. The adjusting threaded rod is rotatably connected to the lower surface of the support base, and the belt pulley transmission module is located inside the support base.

[0009] Preferably, the surface of the pressure plate is provided with a lubrication assembly, the lubrication assembly including an oil reservoir installed on one side of the surface of the pressure plate, the surface of the oil reservoir being connected to a cylinder via an oil supply pipe, a piston plate being slidably connected inside the cylinder, and a push rod being fixedly installed at one end of the piston plate and slidably connected to the side surface of the cylinder, the push rod being fixedly installed on the side surface of the pull rod.

[0010] Preferably, the surface of the cylinder is provided with a corrugated oil drain pipe, and one-way valves are provided at one end of both the corrugated oil drain pipe and the oil delivery pipe. The corrugated oil drain pipe is installed on the surface of the pull rod by a clamp. A magnetic ring is provided on the outer surface of one end of the corrugated oil drain pipe, and a connecting spring is provided inside one end of the corrugated oil drain pipe. A sealing metal ball is connected to one end of the connecting spring.

[0011] Preferably, the inner wall of the hole is provided with a spiral flow groove, and the top of the spiral flow groove is provided with an inflow groove, which is adapted to the corrugated oil drain pipe.

[0012] Preferably, connecting rods are installed on the surfaces of the upper and lower support bases, and a load sensor is connected to one end of each connecting rod. A gripper module is provided on the outer surface of the load sensor, and a connecting rod is clamped inside the gripper module. The gripper module is electrically slidably connected to the inside of the testing machine, and a displacement sensor is provided on the inner wall of the testing machine.

[0013] Compared with the prior art, the beneficial effects of the present invention are: 1. The device provided by the present invention can measure the anchoring force at the end hook of the end hook steel fiber without pouring the substrate, and can obtain the relationship between the anchoring force and the fiber pull-out displacement according to the real-time displacement change. It can also eliminate the friction and adhesion between the end hook steel fiber and the substrate, and measure the anchoring force provided by the deformation of the end hook alone. At the same time, the anchoring force of the end hook steel fiber with different diameters, different lengths and different end hook bending times can be measured by selecting metal measuring plates with different aperture diameters and different numbers of metal measuring plates. 2. By setting up the positioning components, the steel fiber end hook and the metal measuring plate are accurately positioned and firmly fixed. It can be adapted to steel fibers of different sizes and different end hook shapes, ensuring that the force is concentrated on the end hook part during pull-out, avoiding test errors caused by positioning deviation and loosening. 3. Through the coordinated setup of the positioning and lubrication components, quantitative oil lubrication is automatically and synchronously completed during the connection and positioning of the two pressure plates. This combines two independent steps into one, eliminating the need for additional and tedious manual lubrication, significantly shortening the preparation time for a single test. It also avoids problems such as forgetting to lubricate or uneven oil volume that may occur during manual operation. Furthermore, the precise docking of the magnetic ring and the metal measuring plate ensures that the corrugated oil drain pipe and the inflow groove are precisely aligned, guaranteeing the uniformity of lubrication, improving the accuracy of the end hook anchoring force measurement, and avoiding interference from friction on the test results.

[0014] In summary, this invention overcomes the shortcomings of the prior art, enabling the measurement of the anchoring force at the end hook of the end hook steel fiber without casting a substrate. Furthermore, it can obtain the relationship between the anchoring force and the fiber pull-out displacement based on real-time displacement changes. Moreover, it can eliminate the friction and adhesion between the end hook steel fiber and the substrate, measuring the anchoring force provided solely by the deformation of the end hook. Additionally, by selecting metal measuring plates with different aperture diameters and different numbers of metal measuring plates, the anchoring force of end hook steel fibers with different diameters, lengths, and number of end hook bends can be measured. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a front view structural diagram of the present invention; Figure 3 This is a schematic diagram of the structure of the support base and the metal measuring plate in this invention; Figure 4 This is a schematic diagram of the positioning component and the metal measuring plate in this invention; Figure 5 This is a schematic diagram of the structure of the metal measuring plate and the hole in this invention; Figure 6 This is a schematic diagram of the lubrication assembly in this invention; Figure 7 This is a partial structural schematic diagram of the lubrication assembly in this invention; Figure 8 This is a partial structural diagram of the positioning component in this invention; Figure 9 This is a schematic diagram of the structure of the metal measuring plate and gripper module in this invention.

[0017] In the diagram: 1. Testing machine; 2. Support base; 3. Metal measuring plate; 4. End hook steel fiber; 41. Hole; 42. Groove; 43. Auxiliary positioning steel fiber; 5. Positioning assembly; 501. L-shaped connecting plate; 502. Pressure plate; 503. Insert plate; 504. Return spring; 505. Pull rod; 506. Sliding frame; 507. Adjusting threaded rod; 508. Belt pulley drive module; 6. Lubrication components; 601. Oil reservoir; 602. Spool; 603. Piston plate; 604. Push rod; 605. Corrugated oil drain pipe; 606. Magnetic ring; 607. Connecting spring; 608. Sealing metal ball; 609. Spiral flow channel; 610. Inflow channel; 7. Connecting rod; 8. Load sensor; 9. Gripper module; 10. Displacement sensor. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Example 1: Refer to Figures 1 to 9As shown, a pull-out test device for measuring the anchoring force of end hook steel fiber includes a testing machine 1 and a support base 2 installed on the upper and lower sides inside the testing machine 1. Several metal measuring plates 3 are installed on the surface of the support base 2. Holes 41 for positioning end hook steel fibers 4 are opened on the surface of the metal measuring plates 3. The two ends of the end hook steel fibers 4 are respectively accommodated in the upper and lower parts of the metal measuring plates. A positioning component 5 is provided on the surface of the support base 2. The metal measuring plates 3 are located between the positioning component 5 and the support base 2. One end of the end hook steel fiber 4 is respectively accommodated in the upper and lower metal measuring plates 3.

[0020] Specifically, refer to Figure 5 As shown, the hole 41 is located in the center of the surface of the metal measuring piece 3, and its diameter matches the diameter of the end hook steel fiber 4. Grooves 42 with the same diameter as the end hook steel fiber 4 are opened on both sides of the metal measuring piece 3. An auxiliary positioning steel fiber 43 is slidably installed inside the groove 42. The groove 42 and the auxiliary positioning steel fiber 43 have the same diameter, which can help fix the metal measuring piece 3 and further improve the positioning stability.

[0021] Reference Figure 1 , Figure 2 and Figure 9 As shown, connecting rods 7 are installed on the surfaces of the upper and lower support bases 2. One end of the connecting rods 7 is connected to a load sensor 8. A gripper module 9 is provided on the outer surface of the load sensor 8. The connecting rods 7 are clamped and installed inside the gripper module 9. The gripper module 9 is electrically slidably connected to the inside of the testing machine 1. A displacement sensor 10 is provided on the inner wall of the testing machine 1. The load sensor 8 can monitor the load magnitude in real time during the pull-out process, accurately capture the peak value and variation law of the end hook anchoring force, and the displacement sensor 10 can monitor the displacement during the pull-out process, which is convenient for analyzing the deformation characteristics and anchoring failure process of the end hook steel fiber 4.

[0022] Example 2: Refer to Figure 2 , Figure 3 , Figure 6 and Figure 8 As shown, the difference between this embodiment and embodiment 1 is that the positioning component 5 includes an L-shaped connecting plate 501 that is closely attached to the four corners of the surface of the metal measuring piece 3. The surface of the support base 2 is provided with an adjustment groove for sliding the L-shaped connecting plate 501. The upper surface of the opposite L-shaped connecting plate 501 is rotatably connected to a pressure plate 502 through a hinge seat. The pressure plate 502 can press the surface of the metal measuring piece 3, fix the metal measuring piece 3 and the end hook steel fiber 4, and ensure that the metal measuring piece 3 and the support base 2 are tightly attached during the pulling process.

[0023] Specifically, refer to Figure 2 , Figure 3 , Figure 6 and Figure 8As shown, positioning grooves are provided on the side surfaces of both pressure plates 502. Insert plates 503 are slidably connected inside the positioning grooves. A return spring 504 is installed on the side surface of one of the insert plates 503. The return spring 504 is fixedly installed on the inner side wall of the positioning groove. A first sliding groove is provided on the upper surface of one of the positioning grooves. A pull rod 505 is fixedly installed on the surface of the insert plate 503 and slidably connected inside the first sliding groove. The insert plate 503 is slidably connected in the positioning grooves of both pressure plates 502, which can realize the synchronous fixation of both pressure plates 502, avoid the pressure plates 502 from loosening and causing the metal measuring piece 3 to shift, and ensure the smooth test process.

[0024] Specifically, refer to Figure 2 , Figure 3 , Figure 6 and Figure 8 As shown, a sliding frame 506 is fixedly installed on the lower surface of the L-shaped connecting plates 501 on both sides. An adjusting threaded rod 507 is threadedly connected to the surface of the sliding frame 506. A belt pulley transmission module 508 is installed on the top of the adjusting threaded rod 507 on both sides through a locking pin. The adjusting threaded rod 507 is rotatably connected to the lower surface of the support 2. The belt pulley transmission module 508 is set inside the support 2. The sliding frame 506 and the adjusting threaded rod 507 are threadedly engaged, which can drive the L-shaped connecting plate 501 to slide along the adjusting groove, so as to realize the position adjustment of the L-shaped connecting plate 501 and the pressure plate 502, and adapt to different numbers of metal measuring pieces 3.

[0025] Example 3: Reference Figures 5 to 7 As shown, the difference between this embodiment and Embodiments 1 and 2 is that a lubrication assembly 6 is provided on the surface of the pressure plate 502. The lubrication assembly 6 includes an oil reservoir 601 installed on the surface of one side of the pressure plate 502. The surface of the oil reservoir 601 is connected to a cylinder 602 through an oil supply pipe. A piston plate 603 is slidably connected inside the cylinder 602. A push rod 604 is fixedly installed at one end of the piston plate 603 and slidably connected to the side surface of the cylinder 602. The push rod 604 is fixedly installed on the side surface of the pull rod 505. The lubrication assembly 6 can deliver lubricating oil into the hole 41, reduce the friction between the end hook steel fiber 4 and the inner wall of the hole 41, avoid the friction from affecting the accuracy of the end hook anchoring force measurement, and ensure that the test data truly reflects the individual anchoring effect of the end hook.

[0026] Specifically, refer to Figures 5 to 7As shown, a corrugated oil drain pipe 605 is provided on the surface of the cylinder 602. One-way valves are provided at one end of both the corrugated oil drain pipe 605 and the oil delivery pipe. The corrugated oil drain pipe 605 is installed on the surface of the pull rod 505 by a clamp. A magnetic ring 606 is provided on the outer surface of one end of the corrugated oil drain pipe 605. A connecting spring 607 is provided inside one end of the corrugated oil drain pipe 605. A sealing metal ball 608 is connected to one end of the connecting spring 607. The magnetic ring 606 can be adsorbed on the surface of the metal measuring plate 3 to achieve precise docking between the corrugated oil drain pipe 605 and the inflow groove 610, ensuring that all lubricating oil is introduced into the hole 41 for lubrication.

[0027] Specifically, refer to Figures 5 to 7 As shown, a spiral flow groove 609 is provided on the inner wall of the hole 41, and an inflow groove 610 is provided on the top of the spiral flow groove 609. The inflow groove 610 is adapted to the corrugated oil drain pipe 605. The spiral flow groove 609 on the inner wall of the hole 41 can make the lubricating oil evenly distributed on the inner wall of the hole 41, ensuring that the contact surface between the end hook steel fiber 4 and the inner wall of the hole 41 is lubricated, and avoiding test errors caused by excessive local friction.

[0028] A method for determining the pull-out test apparatus for measuring the anchoring force of steel fiber end hooks includes the following steps: S1. Determine the length of the end hook area of ​​the end hook steel fiber 4 as needed. Prepare a metal measuring plate with a total thickness greater than the length of the end hook area of ​​the end hook steel fiber 4. Pass one end of the end hook steel fiber 4 through the hole 41 on the metal measuring plate 3 in sequence until the end hook of the end hook steel fiber 4 is completely placed in the fiber channel formed by the central hole 41 of the metal measuring plate 3. S2. Prepare the metal measuring plate 3, making its total thickness greater than the length of the end hook area of ​​the end hook steel fiber 4. Pass the other end of the end hook steel fiber 4 through the hole 41 on the metal measuring plate 3 in sequence until the end hook of the end hook steel fiber 4 is completely placed in the fiber channel formed by the central hole 41 of the metal measuring plate 3. S3. Prepare four additional auxiliary positioning steel fibers 43, divide the auxiliary positioning steel fibers 43 into two sections from the middle, and place them into the grooves 42 on both sides of the metal measuring plate 3 respectively. S4. The assembled metal measuring plate 3 and end hook steel fiber 4 are fixed on the base 2 by the positioning component 5, and the positioning component 5 passes through the base 2 to fix the metal measuring plate 3 in the corresponding position. At the same time, the end hook steel fiber 4 is lubricated by the lubrication component 6. S5. Install the assembled measuring device onto the testing machine 1 and connect the load sensor 8 and the displacement sensor 10. After installation, fix the lower end of the support base 2 and apply an upward displacement to the upper end until one end of the end hook steel fiber 4 is pulled out from the metal measuring plate 3.

[0029] It should be noted that the metal measuring plate 3 is made of 45 steel, which has high strength, good wear resistance, and can withstand a large number of repeated tests, making it a stable and reliable universal choice. The metal measuring plate 3 is 7cm long and 5cm wide, and its thickness is usually between 0.10-0.25mm. The groove 42 is 3mm deep and its width matches the diameter of the end hook steel fiber 4. This thickness range ensures structural strength while also guaranteeing flexibility, allowing for precise matching of the end hook length of different steel fibers by stacking multiple plates.

[0030] Working principle: In this invention, the operator first prepares a common end-hook steel fiber 4 to be tested. The two ends of the common end-hook steel fiber 4 are passed through a certain number of metal measuring plates 3 through holes 41 to ensure that the end hook area of ​​the common end-hook steel fiber 4 can be completely contained in the holes 41 formed by the metal measuring plates 3. Then, the several metal measuring plates 3 are placed on the surface of the support 2. Then, the adjusting threaded rod 507 is rotated, and the belt pulley transmission module 508 drives the adjusting threaded rods 507 on both sides to rotate synchronously. The sliding frame 506 drives the L-shaped connecting plate 501 to slide along the adjusting groove, so that the top pressure plate 502 is level with the topmost metal measuring plate 3. Pull the pull rod 505, which drives the insert plate 503 to compress the return spring 504. Rotate the pressure plate 502 to press the metal measuring plate 3. Release the pull rod 505, and the return spring 504 pushes the insert plate 503 to engage with the positioning grooves on both sides to fix the pressure plate 502 on the opposite side. During the pulling of the lever 505, the push rod 604 and the piston plate 603 slide along the inside of the cylinder 602, drawing the lubricating oil inside the oil tank 601 into the cylinder 602 through the oil delivery pipe and the one-way valve. During the release of the lever 505, the lubricating oil is discharged through the corrugated oil drain pipe 605 by the movable piston plate 603. The sealing metal ball 608 moves and stretches the connecting spring 607 under the attraction of the magnetic force of the metal measuring plate 3. One end of the corrugated oil drain pipe 605 is in an open state, first passing through the inflow groove 610 and then to the spiral flow groove 609, and is evenly distributed on the inner wall of the hole 41, lubricating the end hook steel fiber 4. When one end of the corrugated oil drain pipe 605 is not in contact with the metal measuring plate 3, the sealing metal ball 608 blocks one end of the corrugated oil drain pipe 605. The magnetic force between the sealing metal ball 608 and the metal measuring plate 3 is greater than the restoring force of the connecting spring 607 set above. At this point, the positioning component 5, the metal measuring plate 3, and the support base 2 are tightly connected without gaps. Prepare four additional auxiliary positioning steel fibers 43. Divide the end hook steel fiber 4 into two sections from the middle and place them into the grooves 42 reserved on both sides of the metal measuring plate 3. After the three components are installed, install one section of the connecting rod 7 into the testing machine 1 and fix the upper and lower devices through the gripper module 9. Start the testing machine 1, and the gripper module 9 drives the upper and lower connecting rods 7 to move synchronously in opposite directions, thereby causing the upper and lower support bases 2 to separate in opposite directions and pull out the end hook steel fiber 4. During the pulling process, the load sensor 8 monitors the pulling load data in real time, and the displacement sensor 10 monitors the displacement data in real time. The test data is recorded synchronously. The pulling continues until the end hook of the end hook steel fiber fails to anchor or the steel fiber is pulled out. Record the maximum load and the corresponding displacement at this time. The relationship curve between the end hook anchoring force and displacement can be plotted using the data collected by the load sensor 8 and the displacement sensor 10. If it is necessary to compare the anchoring force of different end hook shapes, repeat the above steps and carry out multiple sets of comparative tests.

[0031] The control method of this invention is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art. The power supply is also common knowledge in the art. Furthermore, since this invention is mainly used to protect mechanical devices, the control method and circuit connection will not be explained in detail here.

[0032] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A pull-out test device for determining the anchoring force of steel fiber end hooks, comprising a testing machine (1) and a support base (2) installed on the upper and lower sides inside the testing machine (1), characterized in that: The surface of the support base (2) is equipped with several metal measuring plates (3). The surface of the metal measuring plates (3) is provided with holes (41) for positioning the end hook steel fiber (4). The two ends of the end hook steel fiber (4) are respectively housed in the upper and lower parts of the metal measuring plates. The surface of the support base (2) is provided with a positioning component (5). The metal measuring plates (3) are located between the positioning component (5) and the support base (2). The upper and lower sides of the metal measuring plates (3) respectively house one end of the end hook steel fiber (4).

2. The pull-out test device for determining the anchoring force of steel fiber end hooks according to claim 1, characterized in that: The hole (41) is located in the center of the surface of the metal measuring plate (3), and its diameter matches the diameter of the end hook steel fiber (4). The two sides of the metal measuring plate (3) are provided with grooves (42) with the same diameter as the end hook steel fiber (4). The grooves (42) are equipped with auxiliary positioning steel fibers (43).

3. The pull-out test device for determining the anchoring force of steel fiber end hooks according to claim 2, characterized in that: The positioning component (5) slides through the L-shaped connecting plate (501) on the surface of the support base (2). The surface of the support base (2) is provided with an adjustment groove for the sliding of the L-shaped connecting plate (501). The upper surface of the L-shaped connecting plate (501) on the opposite side is rotatably connected to a pressure plate (502) via a hinge seat.

4. The pull-out test device for determining the anchoring force of steel fiber end hooks according to claim 3, characterized in that: The side surfaces of the pressure plates (502) on both sides are provided with positioning grooves. The inside of the positioning grooves is slidably connected to the insert plate (503). A return spring (504) is installed on the side surface of one of the insert plates (503). The return spring (504) is fixedly installed on the inner side wall of the positioning groove. The upper surface of one of the positioning grooves is provided with a first sliding groove. A pull rod (505) that is slidably connected to the inside of the first sliding groove is fixedly installed on the surface of the insert plate (503).

5. The pull-out test device for determining the anchoring force of steel fiber end hooks according to claim 4, characterized in that: Sliding brackets (506) are fixedly installed on the lower surfaces of the L-shaped connecting plates (501) on both sides. Adjusting threaded rods (507) are threadedly connected to the surface of the sliding brackets (506). Belt drive modules (508) are installed on the top of the adjusting threaded rods (507) on both sides through locking pins. The adjusting threaded rods (507) are rotatably connected to the lower surface of the support base (2). The belt drive modules (508) are located inside the support base (2).

6. The pull-out test device for determining the anchoring force of steel fiber end hooks according to claim 3, characterized in that: The surface of the pressure plate (502) is provided with a lubrication assembly (6). The lubrication assembly (6) includes an oil reservoir (601) installed on one side of the surface of the pressure plate (502). The surface of the oil reservoir (601) is connected to a cylinder (602) through an oil supply pipe. A piston plate (603) is slidably connected inside the cylinder (602). A push rod (604) is fixedly installed at one end of the piston plate (603) and slidably connected to the side surface of the cylinder (602). The push rod (604) is fixedly installed on the side surface of the pull rod (505).

7. The pull-out test device for determining the anchoring force of steel fiber end hooks according to claim 6, characterized in that: The surface of the cylinder (602) is provided with a corrugated oil drain pipe (605). One-way valves are provided at one end of both the corrugated oil drain pipe (605) and the oil delivery pipe. The corrugated oil drain pipe (605) is installed on the surface of the pull rod (505) by a clamp. A magnetic ring (606) is provided on the outer surface of one end of the corrugated oil drain pipe (605). A connecting spring (607) is provided inside one end of the corrugated oil drain pipe (605). A sealing metal ball (608) is connected to one end of the connecting spring (607).

8. The pull-out test device for determining the anchoring force of steel fiber end hooks according to claim 7, characterized in that: The inner wall of the hole (41) is provided with a spiral flow groove (609), and the top of the spiral flow groove (609) is provided with an inflow groove (610), which is adapted to the corrugated oil drain pipe (605).

9. The pull-out test device for determining the anchoring force of steel fiber end hooks according to claim 1, characterized in that: Connecting rods (7) are installed on the surfaces of the upper and lower support bases (2). One end of the connecting rods (7) on the upper and lower sides is connected to a load sensor (8). A gripper module (9) is provided on the outer surface of the load sensor (8). The connecting rod (7) is clamped inside the gripper module (9). The gripper module (9) is electrically slidably connected to the inside of the testing machine (1). A displacement sensor (10) is provided on the inner wall of the testing machine (1).

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