A ring-shaped centripetal static and dynamic combined loading test device and its use method

Abstract

The present invention relates to the technical field of static-dynamic combined loading test devices, and is an annular centripetal static-dynamic combined loading test device, comprising a frame structure 1 and a loading cylinder 2, wherein the frame structure 1 is a combined component structure, comprising a first support 12, a second support 13 is arranged inside the first support 12, the first support 12 and the second support 13 are both cylindrical ring structures, and the loading cylinder 2 is embedded in the first support 12 and the second support 13; an upper table 11 is arranged on the upper surface of the first support 12 and the second support 13, and a specimen placement surface 14 to be loaded is arranged on the lower side of the second support 13; an adjusting device 3 is arranged on one side of the loading cylinder 2, and the adjusting device 3 includes a driving device 31; the present invention has the following beneficial effects, namely, an annular centripetal symmetrical and asymmetrical loading test on the specimen can be realized, and loading of impact specimens of different sizes can be realized; the loading bearing range is larger; one-key synchronous adjustment can be realized, and the symmetry of loading is guaranteed to a greater extent.

Description

Technical Field

[0001] The invention relates to the technical field of static and dynamic combined loading test devices, in particular to an annular centripetal static and dynamic combined loading test device and a use method thereof. Background Art

[0002] my country's coal resources have generally entered the deep mining stage. The high stress and strong disturbance in the deep cause the damage of dynamic disasters such as rock burst to become more and more severe. In severe cases, it will cause hundreds of meters of tunnels to shrink and deform instantly, collapse, and damage the support body. In response to this engineering problem, the development of support equipment with anti-impact and anti-impact characteristics is urgently needed in the deep mining stage of mines with dynamic disasters such as rock burst. Among the existing tunnel support equipment, O-type shed supports (annular U-shaped steel supports) and arched gate hydraulic supports are the two most significant and critical types of anti-impact effects in shafts and tunnels. Among them, O-type shed supports are widely used and have a large application volume; arched gate hydraulic supports are the most significant support equipment for improving the strength of tunnel support and enhancing the stability of the support system. The two types of support equipment are both circular tunnel section supports. They must bear the pressure of the surrounding rock inward (into the tunnel) and the impact of the surrounding rock to the inside of the tunnel during sudden impact. If the superimposed load exceeds its bearing capacity, serious deformation, damage or collapse will occur. Therefore, the design and performance research of the anti-impact function of the O-type shed support and arched door hydraulic support requires the test or detection of the superposition of static and dynamic loads (impact) distributed in a circle to simulate the response when subjected to impact in the circular tunnel support state.

[0003] The existing domestic impact testing machines mainly include pendulum impact testing machines, drop hammer impact testing machines, Hopkinson pressure bar impact testing machines, and uniaxial hydraulic impact testing machines. Among them, the pendulum impact testing machine is mainly used to test the impact performance of materials, with a relatively small energy level, generally only a few hundred joules of energy; the metal drop hammer impact testing machine has a relatively wide test range, and the largest test range is the heavy-duty ultra-high drop hammer impact testing machine of the Institute of Comprehensive Protection of Engineering Structures of Hunan University, with an energy level of up to 100,000 joules and a speed of up to 17m / s, but it is also a unidirectional impact; the Hopkinson pressure bar impact testing machine is mainly used for high-speed impact testing of small specimens, with a relatively high bullet impact speed, but a relatively small energy level; the uniaxial hydraulic impact testing machine currently has a tonnage of 650T in China, but it is also limited to unidirectional impact testing. In addition, the British Instron high-speed impact testing machine and the Japanese Shimadzu Shimadzu impact testing machine are both unidirectional impact testing machines.

[0004] From the above, it can be seen that various forms of impact testing machines currently cannot perform circular loading and cannot meet the needs of annular centripetal static and dynamic (impact) loading of circular tunnel section support equipment. Therefore, it is urgently necessary to innovate and invent a new type of annular centripetal loading testing machine to realize static and dynamic loading testing and detection of tunnel section support equipment.

[0005] In addition, to facilitate research, support equipment is usually tested using models of different scales. At the same time, it is also necessary to study the performance differences of different types of support equipment. Therefore, the platform range of the test device needs to have a certain degree of adaptability. Summary of the invention

[0006] The present invention provides an annular centripetal static and dynamic combined loading test device and a method for using the same, which can overcome certain or some defects of the prior art.

[0007] According to the present invention, an annular centripetal static and dynamic combined loading test device comprises a frame structure and a loading cylinder. The frame structure is a combined component structure, comprising a first support, a second support is arranged inside the first support, wherein the first support and the second support are both cylindrical ring structures and are arranged concentrically, and the loading cylinder is embedded in the first support and the second support; at the same time, an upper table is arranged on the upper surface of the first support and the second support, and a loading specimen placement surface for placing a specimen to be loaded is arranged on the lower side of the second support;

[0008] An adjusting device is provided on one side of the loading cylinder, and the adjusting device includes a driving device, a first driving wheel is provided on the shaft of the driving device for synchronous rotation, a second driving wheel is meshed with one side of the first driving wheel, the axis of the second driving wheel is coaxial with the loading cylinder, and a bearing ring capable of synchronous rotation is provided on the inner side of the second driving wheel, the bearing ring is provided between the first support and the second support, and the second driving wheel is provided at a symmetrical position in the middle of the bearing ring. At the same time, the bearing ring is spirally connected to the outer surface of the loading cylinder, and fixing rings are provided on the outer sides of both ends of the bearing ring, and the fixing rings are fixed to the first support and the second support by screws. At the same time, a drag reducing ring is provided between the fixing ring and the bearing ring, and a low-resistance material is provided between the second driving wheel and the fixing ring.

[0009] Preferably, the driving device is connected to a hand wheel, and drives the first driving wheel to rotate by manual rotation.

[0010] Preferably, the axis of the loading cylinder points to the center of the first support and the second support, and a plurality of adjustment devices are provided on the circumference of the frame structure, and the adjustment devices are arranged in a one-to-one correspondence with the loading cylinders.

[0011] Preferably, both the first drive wheel and the second drive wheel are cylindrical gears, and the number of teeth on the first drive wheel is smaller than the number of teeth on the second drive wheel.

[0012] Preferably, the spiral connection between the load-bearing ring and the loading cylinder is achieved through high-strength trapezoidal spiral teeth.

[0013] Preferably, an auxiliary sleeve is provided on the rear side of the loading cylinder, and the auxiliary sleeve includes a guide cylinder, a sliding groove is provided on the inner ring of the guide cylinder, and a sliding block capable of relative sliding is provided in the sliding groove, and the sliding block is fixed to the outer wall of the rear side of the loading cylinder. The auxiliary sleeve also includes a flange for connection, and the flange can cover the fixing screws of the fixing ring. The flange is fixedly connected to the first support through screw holes.

[0014] Preferably, a loading head is provided at the end of the piston rod of the loading cylinder, and the connection between the loading cylinder and the loading head is configured as a ball joint.

[0015] Preferably, the driving device is connected to a motor disposed at the bottom, and the output shaft of the motor synchronously drives the first driving wheel, and the first driving wheel is meshed with the second driving wheel for transmission.

[0016] Preferably, the first drive wheel and the second drive wheel are both configured as bevel gears.

[0017] Preferably, one of the first driving wheels is meshed and driven with multiple second driving wheels simultaneously.

[0018] The present invention also provides a method for using the annular centripetal static and dynamic combined loading test device, comprising the following steps:

[0019] ① The present invention is assembled according to the connection relationship, and equipped with a corresponding hydraulic station. The outer side of each loading cylinder is connected to an accumulator through a solenoid valve, and each accumulator is connected to the hydraulic station through a corresponding control valve, which is used to provide dynamic loading for the specimen to be loaded; at the same time, each loading cylinder is also connected to the hydraulic station through a corresponding control valve to form a static loading circuit, which is used to provide static loading for the specimen to be loaded;

[0020] ② Place the specimen to be loaded on the specimen placement surface, select the loading cylinder to be used according to the test requirements, and adjust the loading cylinder to the appropriate position by turning the hand wheel corresponding to each loading cylinder;

[0021] ③ Accumulate energy in the accumulator connected to the loading cylinder to be used, and stop when the set energy is reached;

[0022] ④Inject hydraulic oil into the loading cylinder through the control system to achieve static loading of the specimen to be loaded. In order to prevent the specimen to be loaded from moving, hydraulic oil can be injected into the loading cylinders to be used at the same time. The respective pipelines are independent, which can further improve the synchronization of loading. The loading stops when the load reaches the set value;

[0023] ⑤ The control system controls the switching state of the solenoid valve between the accumulator and the loading cylinder to quickly provide a large flow to the loading cylinder to form dynamic loading for the specimen to be loaded. Since the accumulator and the loading cylinder are set one-to-one, the solenoid valve is selected as a high-speed response valve, and the dynamic load formed can achieve an impact effect.

[0024] ⑥ By switching the control valve state through the static loading circuit, the loading cylinder can be retracted, and the specimen residue can be removed to complete a loading test.

[0025] Compared with the prior art, the present invention has at least the following beneficial effects:

[0026] 1. The axis of the loading cylinder of the present invention points to the center of the first support and the second support, and multiple loading cylinders are provided on the circumference of the frame structure to achieve centripetal loading;

[0027] 2. The present invention can realize annular centripetal symmetrical and asymmetrical loading tests on the specimen to be loaded by adjusting the adjusting device, and can also realize loading tests on the specimen with impact loads of different sizes under the same loading stroke, thereby increasing adaptability;

[0028] 3. The present invention has a wider loading tolerance range under the condition that the front and rear displacement of the loading cylinder is adjusted to load the test piece with impact loads of different sizes;

[0029] 4. The present invention can realize one-key synchronous adjustment of the front and rear displacement of the loading cylinder, thereby ensuring the symmetry of the loading to a greater extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the main cutaway structure of the present invention;

[0031] Figure 2 for Figure 1 A partial enlarged schematic diagram in the middle;

[0032] Figure 3 It is a schematic diagram of the top view structure of the present invention;

[0033] Figure 4 It is a schematic diagram of the main cutaway structure of the second embodiment of the present invention;

[0034] Figure 5 It is a schematic diagram of the main cutaway structure of the present invention in the third embodiment.

[0035] in:

[0036] 1. Frame structure; 11. Upper table; 12. First support; 13. Second support; 14. Loading specimen placement surface; 2. Loading cylinder; 21. Loading head; 22. Slider; 3. Adjustment device; 31. Drive device; 32. First drive wheel; 33. Second drive wheel; 34. Loading ring; 35. Fixing ring; 36. Drag reduction ring; 37. Handwheel; 38. Motor; 4. Auxiliary sleeve; 41. Guide cylinder; 42. Slide groove; 43. Flange; 44. Screw hole. DETAILED DESCRIPTION

[0037] In order to further understand the content of the present invention, the present invention is described in detail in conjunction with the accompanying drawings and embodiments. It should be understood that the embodiments are only for explaining the present invention and are not intended to limit it.

[0038] Embodiment 1

[0039] like Figures 1 to 4 As shown, an annular centripetal static and dynamic combined loading test device comprises a frame structure 1 and a loading cylinder 2. The frame structure 1 is a combined component structure, which can be a welded component or a bolted component, and comprises a first support 12. A second support 13 is arranged inside the first support 12. The first support 12 and the second support 13 are both cylindrical ring structures and are arranged concentrically. The loading cylinder 2 is embedded in the first support 12 and the second support 13. At the same time, an upper table 11 is arranged on the upper surface of the first support 12 and the second support 13, and a loading specimen placement surface 14 for placing the specimen to be loaded is arranged on the lower side of the second support 13, which is used to place the specimen to be loaded.

[0040] An adjusting device 3 is provided on one side of the loading cylinder 2. The adjusting device 3 includes a driving device 31. A first driving wheel 32 is provided on the shaft of the driving device 31 for synchronous rotation. A second driving wheel 33 is meshed on one side of the first driving wheel 32. The axis of the second driving wheel 33 is coaxial with the loading cylinder 2, and a bearing ring 34 capable of synchronous rotation is provided on the inner side of the second driving wheel 33. The bearing ring 34 is provided between the first support 12 and the second support 13. The second driving wheel 33 is provided at a symmetrical position in the middle of the bearing ring 34. At the same time, the bearing ring 34 is spirally connected to the outer surface of the loading cylinder 2. A fixing ring 35 is provided on the outer side of both ends of the bearing ring 34. The fixing ring 35 is fixed to the first support 12 and the second support 13 by screws. At the same time, a drag reducing ring 36 is provided between the fixing ring 35 and the bearing ring 34 to reduce friction. A low-resistance material is provided between the second driving wheel 33 and the fixing ring 35 to facilitate positioning of the second driving wheel 33 without interfering with rotation.

[0041] The first driving wheel 32 is driven by the rotation of the driving device 31, and the meshed second driving wheel 33 is driven to rotate, and the carrying ring 34 located on the inner side of the second driving wheel 33 and rotating synchronously is also driven to rotate. Since the carrying ring 34 is spirally connected to the outer surface of the loading cylinder 2, when the carrying ring rotates, the loading cylinder 2 also moves back and forth accordingly, so as to realize the loading of test pieces of different models and sizes.

[0042] Preferably, the driving device 31 is connected to a hand wheel 37 , and drives the first driving wheel 32 to rotate by manual rotation, so as to adjust the front and rear displacement of the loading cylinder 2 .

[0043] Preferably, the axis of the loading cylinder 2 points to the center of the first support 12 and the second support 13, and multiple adjustment devices 3 are arranged on the circumference of the frame structure 1, and the adjustment devices 3 are arranged one-to-one with the loading cylinders 2 to form an annular centripetal loading device.

[0044] A plurality of loading cylinders 2 and adjusting devices 3 are provided, and each loading cylinder 2 is adjusted. When the adjustment amount of each loading cylinder 2 is different, annular centripetal symmetric and asymmetric loading of the specimen in loading formation can be achieved.

[0045] Preferably, both the first driving wheel 32 and the second driving wheel 33 are cylindrical gears, and the number of teeth of the first driving wheel 32 is smaller than that of the second driving wheel 33, which is beneficial to driving.

[0046] Preferably, the spiral connection between the load-bearing ring 34 and the loading cylinder 2 is achieved through high-strength trapezoidal spiral teeth, which is beneficial for improving the loading tolerance range of the loading cylinder 2 .

[0047] Preferably, an auxiliary sleeve 4 is provided on the rear side of the loading cylinder 2, and the auxiliary sleeve 4 includes a guide cylinder 41, a slide groove 42 is provided on the inner circle of the guide cylinder 41, and a slider 22 capable of relative sliding is provided in the slide groove 42, and the slider 22 is fixed to the outer wall of the rear side of the loading cylinder 2. The auxiliary sleeve 4 also includes a flange 43 for connection, and the flange 43 can cover the fixing screws of the fixing ring 35. The flange 43 is fixedly connected to the first support 12 through the screw hole 44.

[0048] Such an arrangement avoids relative rotation of the loading cylinder 2 and facilitates the loading cylinder 2 to move forward and backward.

[0049] Preferably, a loading head 21 is provided at the end of the piston rod of the loading cylinder 2 to increase the loading action area. When the connection between the loading cylinder 2 and the loading head 21 is set to a ball joint, a certain degree of eccentric load can be applied to the specimen to improve adaptability. In the drawings of the present application, the loading head 21 is set to be threaded and the pressure sensor 37, and the shape is set to be in plane contact, but it can be set to more than just such a structure. Bolt connection and fixed connection are also within the protection scope of the present application. The loading head 21 set to bullet-shaped contact and U-shaped contact is also within the protection scope of the present application. Among them, the loading head 21 with a U-shaped contact shape can limit the specimen to be loaded, avoid the situation where static loading is required when installing the specimen, and can also effectively prevent the problem of warping of the specimen to be loaded after being deformed under load instead of continuing radial deformation.

[0050] like Figures 1 to 4 As shown, the present invention also provides a method for using the annular centripetal static and dynamic combined loading test device:

[0051] ① The present invention is assembled according to the connection relationship, and equipped with a corresponding hydraulic station. The outer side of each loading cylinder 2 is connected to an accumulator through a solenoid valve, and each accumulator is connected to the hydraulic station through a corresponding control valve, which is used to provide dynamic loading for the specimen to be loaded; at the same time, each loading cylinder 2 is also connected to the hydraulic station through a corresponding control valve to form a static loading circuit, which is used to provide static loading for the specimen to be loaded;

[0052] ② Place the specimen to be loaded on the specimen loading placement surface 14, select the loading cylinder 2 to be used according to the test requirements, and adjust the loading cylinder 2 to a suitable position by turning the hand wheel 37 corresponding to each loading cylinder 2, so as to achieve annular centripetal symmetrical and asymmetrical loading;

[0053] ③ Accumulate energy in the accumulator connected to the loading cylinder 2 to be used, and stop when the set energy is reached;

[0054] ④ The control system injects hydraulic oil into the loading cylinder 2 to realize static loading of the specimen to be loaded. To prevent the specimen to be loaded from moving, the hydraulic oil can be injected into the loading cylinders 2 to be used at the same time. The respective pipelines are independent, which can further improve the synchronization of loading. The loading stops when the load reaches the set value;

[0055] ⑤ The control system controls the switching state of the solenoid valve between the accumulator and the loading cylinder 2, so as to quickly provide a large flow to the loading cylinder 2 to form a dynamic loading for the specimen to be loaded. Since the accumulator and the loading cylinder 2 are set one-to-one, the solenoid valve is selected as a high-speed response valve, and the dynamic load formed can achieve an impact effect.

[0056] ⑥ By switching the control valve state through the static loading circuit, the loading cylinder 2 can be retracted, and the specimen residue can be removed to complete a loading test.

[0057] Working principle or usage process:

[0058] The present invention is assembled according to the connection relationship, and equipped with a corresponding hydraulic station. The outer side of each loading cylinder 2 is connected to an accumulator through an electromagnetic valve, and each accumulator is connected to the hydraulic station through a corresponding control valve, which is used to provide dynamic loading for the specimen to be loaded; at the same time, each loading cylinder 2 is also connected to the hydraulic station through a corresponding control valve, which is used to provide static loading for the specimen to be loaded; the specimen to be loaded is placed on the loading specimen placement surface 14, and the electromagnetic valve on the outer side of each loading cylinder 2 can be controlled to be enabled according to the loading needs, so as to realize whether the loading action position is symmetrical, and further realize symmetrical and asymmetrical loading of the loading position; by turning the hand wheel 37 corresponding to each loading cylinder 2, the loading cylinder 2 is adjusted to a suitable position, which can adapt to loading specimens of different models and sizes, and can also realize symmetrical and asymmetrical loading formed by loading;

[0059] The accumulator connected to the loading cylinder 2 to be used is stored with energy, and stops when the set energy is reached; hydraulic oil is injected into the loading cylinder 2 through the control system to achieve static loading of the specimen to be loaded. In order to prevent the specimen to be loaded from moving, hydraulic oil can be injected into the loading cylinders 2 to be used at the same time. The respective pipelines are independent, which can further improve the synchronization of loading, and stop when the loading load reaches the set value; the control system controls the switching state of the solenoid valve between the accumulator and the loading cylinder 2 to quickly provide a large flow to the loading cylinder 2 to form dynamic loading of the specimen to be loaded. Since the accumulator and the loading cylinder 2 are set one-to-one, the solenoid valve is selected as a high-speed response valve, and the dynamic load formed can achieve an impact effect.

[0060] By switching the control valve state through the static loading circuit, the loading cylinder 2 can be retracted, and the specimen residue can be taken out, thus completing a loading test.

[0061] Embodiment 2

[0062] like Figure 5 As shown, a ring-shaped centripetal static and dynamic combined loading test device is different from the first embodiment in that: the driving device 31 is connected to the motor 38 placed at the bottom, the output shaft of the motor 38 synchronously drives the first driving wheel 32, and the first driving wheel 32 is meshed with the second driving wheel 33 for transmission.

[0063] Meanwhile, the first driving wheel 32 and the second driving wheel 33 are both configured as bevel gears.

[0064] A first driving wheel 32 is meshed with a plurality of second driving wheels 33 for transmission at the same time.

[0065] With such arrangement, multiple loading cylinders 2 are synchronously adjusted to adapt to specimens of different models and sizes to be loaded, which is beneficial to the synchronization of adjustment and realizes absolutely annular concentric symmetrical loading.

[0066] The present invention and its embodiments are described schematically above, and the description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by it and designs a structural method and an embodiment similar to the technical solution without creativity without departing from the purpose of the invention, they shall all fall within the protection scope of the present invention.

Claims

1. An annular centripetal static and dynamic combined loading test device, comprising a frame structure (1) and a loading cylinder (2), characterized in that: The frame structure (1) is a composite structure, comprising a first support (12), a second support (13) being arranged inside the first support (12), wherein the first support (12) and the second support (13) are both cylindrical ring structures and are arranged concentrically, and the loading cylinder (2) is embedded in the first support (12) and the second support (13); at the same time, an upper table (11) is arranged on the upper surface of the first support (12) and the second support (13), and a loading specimen placement surface (14) for placing a specimen to be loaded is arranged on the lower side of the second support (13); An adjusting device (3) is provided on one side of the loading cylinder (2), the adjusting device (3) comprising a driving device (31), a first driving wheel (32) being provided on the shaft of the driving device (31) for synchronous rotation, a second driving wheel (33) being meshed with one side of the first driving wheel (32), the axis of the second driving wheel (33) being coaxial with the loading cylinder (2), and a bearing ring (34) capable of synchronous rotation being provided on the inner side of the second driving wheel (33), the bearing ring (34) being provided between the first support (12) and the second support (1 3), the second driving wheel (33) is arranged at a symmetrical position in the middle of the bearing ring (34), and the bearing ring (34) is spirally connected to the outer surface of the loading cylinder (2), and fixing rings (35) are arranged on the outer sides of both ends of the bearing ring (34), and the fixing rings (35) are fixed to the first support (12) and the second support (13) by screws, and a drag reduction ring (36) is arranged between the fixing ring (35) and the bearing ring (34), and a low-resistance material is arranged between the second driving wheel (33) and the fixing ring (35); A plurality of loading cylinders (2) are provided on the circumference of the frame structure (1), the axes of the loading cylinders (2) point to the centers of the first support (12) and the second support (13), and the adjustment devices (3) and the loading cylinders (2) are provided in a one-to-one correspondence.

2. The annular centripetal static and dynamic combined loading test device according to claim 1, characterized in that: The driving device (31) is connected to a hand wheel (37) and drives the first driving wheel (32) to rotate by manual rotation.

3. The annular centripetal static and dynamic combined loading test device according to claim 2, characterized in that: The first drive wheel (32) and the second drive wheel (33) are both cylindrical gears, and the number of teeth of the first drive wheel (32) is smaller than the number of teeth of the second drive wheel (33).

4. The annular centripetal static and dynamic combined loading test device according to claim 3, characterized in that: The spiral connection between the load-bearing ring (34) and the loading cylinder (2) is achieved through high-strength trapezoidal spiral teeth.

5. The annular centripetal static and dynamic combined loading test device according to claim 4, characterized in that: An auxiliary sleeve (4) is provided on the rear side of the loading cylinder (2), the auxiliary sleeve (4) comprising a guide cylinder (41), a slide groove (42) being provided on the inner ring of the guide cylinder (41), a slider (22) being provided in the slide groove (42) capable of relative sliding, the slider (22) being fixedly arranged on the outer wall of the rear side of the loading cylinder (2), the auxiliary sleeve (4) further comprising a flange (43) for connection, the flange (43) being capable of covering the fixing screws of the fixing ring (35), the flange (43) being fixedly connected to the first support (12) via a screw hole (44).

6. The annular centripetal static and dynamic combined loading test device according to claim 1, characterized in that: A loading head (21) is provided at the end of the piston rod of the loading cylinder (2), and the connection between the loading cylinder (2) and the loading head (21) is configured as a ball joint.

7. The annular centripetal static and dynamic combined loading test device according to claim 1, characterized in that: The driving device (31) is connected to a motor (38) disposed at the bottom, and the output shaft of the motor (38) synchronously drives the first driving wheel (32), and the first driving wheel (32) is meshed with the second driving wheel (33) for transmission.

8. The annular centripetal static and dynamic combined loading test device according to claim 7, characterized in that: The first drive wheel (32) and the second drive wheel (33) are both configured as bevel gears; one of the first drive wheels (32) and a plurality of second drive wheels (33) are meshed and driven simultaneously.

9. A method for using the annular centripetal static and dynamic combined loading test device according to any one of claims 1 to 8, characterized in that: The following steps are involved: ① The device is connected to a corresponding hydraulic station, and each loading cylinder (2) is connected to an accumulator via a solenoid valve on the outside, and each accumulator is connected to the hydraulic station via a corresponding control valve, so as to provide dynamic loading for the specimen to be loaded; at the same time, each loading cylinder (2) is also connected to the hydraulic station via a corresponding control valve, so as to form a static loading circuit, so as to provide static loading for the specimen to be loaded; ② Place the specimen to be loaded on the specimen loading placement surface (14), select the loading cylinder (2) to be used according to the test requirements, and adjust the loading cylinder (2) to a suitable position by turning the hand wheel (37) corresponding to each loading cylinder (2); ③ Accumulate energy in the accumulator connected to the loading cylinder (2) to be used, and stop when the set energy is reached; ④ The control system is used to inject hydraulic oil into the loading cylinder (2) to achieve static loading of the specimen to be loaded. To prevent the specimen to be loaded from moving, the loading cylinders (2) to be used can be injected with hydraulic oil at the same time. The respective pipelines are independent, which can further improve the synchronization of loading. The loading stops when the loading load reaches the set value. ⑤ The control system controls the switching state of the electromagnetic valve between the accumulator and the loading cylinder (2) to quickly provide a large flow to the loading cylinder (2) to form a dynamic load on the specimen to be loaded. Since the accumulator and the loading cylinder (2) are set one-to-one, the electromagnetic valve is selected as a high-speed response valve, so that the dynamic load formed can achieve an impact effect; ⑥ By switching the control valve state through the static loading circuit, the loading cylinder (2) can be retracted, and the specimen residue can be removed to complete a loading test.

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