Gun bore radial impact load experimental equipment

Abstract

The utility model provides gun bore radial impact load experiment equipment, which relates to the technical field of impact dynamic model devices, and comprises a support frame, a pneumatic loading assembly, an acceleration conduit, an impact rod, an energy collection assembly and an impact pressure reverser, the pneumatic loading assembly is connected with the top of the support frame; the acceleration conduit is connected below the pneumatic loading assembly and is located in the support frame; the impact rod is connected into the acceleration guide pipe in a sliding manner; the energy collecting assembly is connected with the bottom of the supporting frame, the energy collecting assembly and the pneumatic loading assembly are oppositely arranged, and the upper portion of the energy collecting assembly makes contact with a test piece; the impact pressure reverser is connected with a blast hole formed in the test piece and is opposite to the bottom end of the impact rod. The utility model solves the problems in the prior art that the loading of radial impact load is difficult to realize and the equipment is easy to damage or the experimental data is inaccurate.

Description

Technical Field

[0001] This utility model relates to the technical field of impact dynamics model devices, and in particular to an experimental device for radial impact load on boreholes. Background Technology

[0002] With the development of experimental equipment, various impact loading devices have been widely used. However, these structures still have some problems in practical use. For example, current impact loading devices on the market usually adopt the traditional axial loading method, which makes it difficult to achieve radial impact loading. This limits their application in studying the propagation law of plane stress waves and crack evolution law of brittle materials. In addition, existing equipment often lacks an effective energy buffering mechanism during loading, which can easily lead to equipment damage or inaccurate experimental data. Utility Model Content

[0003] In view of this, the purpose of this utility model is to provide a radial impact load test device for boreholes, which aims to solve the problems in the prior art that it is difficult to achieve radial impact load loading and that it is easy to cause equipment damage or inaccurate experimental data.

[0004] To achieve the above objectives, the embodiments of this utility model adopt the following technical solutions:

[0005] A radial impact load testing device for boreholes includes: a support frame, a pneumatic loading assembly, an acceleration conduit, an impact rod, an energy harvesting assembly, and an impact pressure transducer. The pneumatic loading assembly is connected to the top of the support frame; the acceleration conduit is connected below the pneumatic loading assembly and located within the support frame; the impact rod is slidably connected within the acceleration conduit; the energy harvesting assembly is connected to the bottom of the support frame and is disposed opposite to the pneumatic loading assembly, with the upper part of the energy harvesting assembly contacting the specimen; the impact pressure transducer is connected to a borehole opened on the specimen and is disposed opposite to the bottom end of the impact rod.

[0006] Furthermore, the pneumatic loading assembly is connected to a nitrogen cylinder.

[0007] Furthermore, the acceleration conduit is detachably connected to the pneumatic loading assembly.

[0008] Furthermore, the impact rod includes a cylindrical section and a frustum section.

[0009] Furthermore, the impact pressure commutator includes a fixed ring and incident rods, with a plurality of incident rods evenly spaced and connected to the fixed ring.

[0010] Furthermore, the incident rod is movably connected to the fixed ring.

[0011] Furthermore, the energy recovery assembly includes at least a base, a limiting groove, a flexible buffer plate, elastic elements, a locking element, and a baffle. A placement platform is connected to the top of the base, the limiting groove is connected inside the base, and multiple elastic elements are spaced apart and connected inside the limiting groove. The lower surface of the flexible buffer plate contacts the top of the elastic elements. Two baffles are connected to the base and are located on both sides of the limiting groove. Multiple elastic elements are spaced apart from top to bottom on the inner side of the baffle. An elastic strip connects the elastic elements to the baffle, and the elastic elements are movably connected inside the side wall of the limiting groove.

[0012] Furthermore, the locking member has an inclined surface on the side near the elastic member.

[0013] Based on the above technical features, the beneficial effects of this utility model are as follows: This utility model provides a borehole radial impact load experimental device, which includes a support frame, a pneumatic loading assembly, an acceleration guide tube, an impact rod, an energy harvesting assembly, and an impact pressure reversing device. It can convert axial impact loads into radial impact loads, and through an inclined plane, transform the vertically downward impact force into a horizontal impact force acting on the borehole wall of the specimen. This realizes the process of converting impact pressure into stress waves in the specimen. Throughout the process, the data acquisition system collects relevant data in real time, effectively completing the borehole radial impact load loading experiment. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the impact rod in this utility model;

[0016] Figure 3 This is a schematic diagram of the impact pressure commutator in this utility model;

[0017] Figure 4 This is a top view of the impact pressure commutator in this utility model;

[0018] Figure 5 This is another top view of the impact pressure commutator in this utility model;

[0019] Figure 6 This is a schematic diagram of the energy recovery component in this utility model.

[0020] In the diagram: 1-Support frame; 2-Pneumatic loading assembly; 201-Nitrogen cylinder; 3-Acceleration conduit; 4-Impact rod; 401-Cylindrical section; 402-Frustum section; 5-Energy harvesting assembly; 501-Base; 502-Limiting groove; 503-Flexible buffer plate; 504-Elastic element; 505-Clocking element; 506-Placement platform; 507-Baffle; 6-Impact pressure reversing device; 601-Fixing ring; 602-Incident rod. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Example

[0023] Please refer to the above as well. Figures 1-6 This utility model provides an experimental device for radial impact load on a borehole, relating to the technical field of impact dynamics model devices. The device includes: a support frame 1, a pneumatic loading assembly 2, an acceleration conduit 3, an impact rod 4, an energy harvesting assembly 5, and an impact pressure reversing device 6. The pneumatic loading assembly 2 is connected to the top of the support frame 1; the acceleration conduit 3 is connected below the pneumatic loading assembly 2 and located within the support frame 1; the impact rod 4 is slidably connected within the acceleration conduit 3; the energy harvesting assembly 5 is connected to the bottom of the support frame 1, and is positioned opposite to the pneumatic loading assembly 2, with its upper part contacting the specimen; the impact pressure reversing device 6 is connected to a borehole on the specimen and is positioned opposite to the bottom end of the impact rod 4.

[0024] It should be noted that this embodiment includes a support frame 1, a pneumatic loading assembly 2, an acceleration conduit 3, an impact rod 4, an energy harvesting assembly 5, and an impact pressure reversing device 6. The support frame 1 connects all the components or parts in the entire device. The acceleration conduit 3 provides an acceleration channel for converting pressure energy into kinetic energy. The impact rod 4 and the impact pressure reversing device 6 convert axial impact loads into radial impact loads. The energy harvesting assembly 5 buffers the impact rod 4, thereby preventing damage to the impact rod 4 and preventing the impact rod 4 from damaging the support frame 1. In use, the specimen with the borehole is placed above the energy harvesting assembly 5 and below the impact rod 4. Then, the impact pressure reversing device 6 is connected to the borehole of the specimen. The pneumatic loading assembly 2 provides high-pressure gas, which passes through the acceleration conduit 3 and pushes the impact rod 4 to accelerate. The impact rod 4 makes center contact with the impact pressure reversing device 6 and converts the vertically downward impact force into a horizontal impact force acting on the borehole wall of the specimen through the inclined plane. This realizes the process of converting the impact pressure into a stress wave in the specimen. Throughout the process, the data acquisition system collects relevant data in real time. Finally, the radial impact load loading experiment of the borehole is effectively completed, solving the problems of difficulty in achieving radial impact load loading and easy damage to equipment or inaccurate experimental data in the existing technology.

[0025] Furthermore, the pneumatic loading assembly 2 is connected to the nitrogen cylinder 201. The pneumatic loading assembly 2 is equipped with a valve and a pressure gauge for observing and controlling the pressure inside the nitrogen cylinder 201 and the cylinder.

[0026] Furthermore, the acceleration conduit 3 is detachably connected to the pneumatic loading assembly 2.

[0027] Preferably, the accelerating conduit 3 is fixedly connected to the support frame 1 by eight steel pipes to ensure the stability of the accelerating conduit 3. Both the accelerating conduit 3 and the impact rod 4 are made of 430 stainless steel. During the experiment, the accelerating conduit 3 and the impact rod 4 are magnetized to make them have the same kind of magnetism, so that the impact rod 4 is always located at the center of the accelerating conduit 3 under the repulsive action of the accelerating conduit 3 when accelerating.

[0028] Further, the impact rod 4 includes a cylindrical section 401 and a frustum section 402. The diameter of the cylindrical section 401 is smaller than the diameter of the acceleration conduit 3, and the smaller diameter end of the frustum section 402 is away from the cylindrical section 401 and opposite to the impact pressure commutator 6. To prevent excessive vertical pressure from being generated when the impact rod 4 contacts the incident rod 602, the slope of the transition section of the frustum section 402 is preferably controlled within 10°. When conducting radial isotropic impact load tests, the following can be adopted: Figure 4 As shown, all incident rods 602 are of uniform length to ensure that the impact load is applied evenly to the borehole wall; when conducting radially anisotropic impact load tests, the following can be adopted: Figure 5As shown, the anisotropic impact load is achieved by adjusting the length of the incident rod 602.

[0029] Furthermore, the impact pressure commutator 6 includes a fixed ring 601 and incident rods 602, with multiple incident rods 602 evenly spaced and connected to the fixed ring 601. The incident rods 602 are movably connected to the fixed ring 601. Figure 4 and Figure 5 As shown, specifically, the circumference of the fixing ring 601 is evenly spaced with a number of connecting through holes. The number of connecting through holes is determined according to experimental requirements. An incident rod 602 is slidably connected within each of the connecting through holes. One end of the incident rod 602 is tapered, with the tapered end facing outward from the fixing ring 601, i.e., the tapered end contacts the borehole wall. Preferably, the top of the tapered end is rounded, with the rounded curvature matching the borehole curvature of the specimen, thus converting the point load into a surface load, increasing the contact area, and preventing damage during impact with the specimen. The contact portion between the incident rod 602 and the impact rod 4 is an inclined surface, with the slope matching that of the impact rod 4. The incident rod 602 is placed in a circular hole on the fixing ring 601. The length of the incident rod 602 can be customized as needed. When performing radial isotropic loading, the same length of incident rod 602 is used; when performing radial anisotropic loading, different lengths of incident rod 602 can be used.

[0030] Furthermore, the energy recovery assembly includes at least a base 501, a limiting groove 502, a flexible buffer plate 503, elastic elements 504, a locking element 505, and a baffle 507. A placement platform 506 is connected to the top of the base 501. The limiting groove 502 is connected inside the base 501. Multiple elastic elements 504 are spaced apart inside the limiting groove 502. The lower surface of the flexible buffer plate 503 contacts the top of the elastic elements 504. Two baffles 507 are connected to the base 501 and are located on both sides of the limiting groove 502. Multiple elastic elements 504 are spaced apart from top to bottom on the inner side of the baffle 507. An elastic strip is connected between the elastic elements 504 and the baffle 507. The elastic elements 504 are movably connected inside the side wall of the limiting groove 502. The locking member 505 has an inclined surface on the side near the elastic member 504. The cross-sectional area of ​​the inclined surface near the elastic member 504 is smaller than the cross-sectional area away from the elastic member 504. That is, when the flexible buffer plate 503 applies a force to the inclined surface, the locking member 505 can move outward away from the elastic member 504. After the flexible buffer plate 503 passes the locking member 505, the locking member 505 moves inward towards the elastic member 504 under the elastic action, thereby preventing the flexible buffer plate 503 from rebounding.

[0031] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A test apparatus for radial impact load on boreholes, characterized in that, include: The device comprises a support frame (1), a pneumatic loading assembly (2), an acceleration conduit (3), an impact rod (4), an energy harvesting assembly (5), and an impact pressure reversing device (6). The pneumatic loading assembly (2) is connected to the top of the support frame (1). The acceleration conduit (3) is connected below the pneumatic loading assembly (2) and located inside the support frame (1). The impact rod (4) is slidably connected inside the acceleration conduit (3). The energy harvesting assembly (5) is connected to the bottom of the support frame (1) and is arranged opposite to the pneumatic loading assembly (2). The energy harvesting assembly (5) contacts the specimen above. The impact pressure reversing device (6) is connected to a borehole on the specimen and is arranged opposite to the bottom of the impact rod (4).

2. The device according to claim 1, characterized in that, The pneumatic loading assembly (2) is connected to a nitrogen cylinder (201).

3. The device according to claim 1, characterized in that, The acceleration conduit (3) is detachably connected to the pneumatic loading assembly (2).

4. The device according to claim 1, characterized in that, The impact rod (4) includes a cylindrical section (401) and a frustum section (402).

5. The device according to claim 1, characterized in that, The impact pressure commutator (6) includes a fixed ring (601) and an incident rod (602), with multiple incident rods (602) evenly spaced and connected to the fixed ring (601).

6. The device according to claim 5, characterized in that, The incident rod (602) is movably connected to the fixed ring (601).

7. The device according to claim 1, characterized in that, The energy harvesting assembly (5) includes at least a base (501), a limiting groove (502), a flexible buffer plate (503), an elastic element (504), a locking element (505), and a baffle (507). A placement platform (506) is connected to the top of the base (501). The limiting groove (502) is connected inside the base (501). Multiple elastic elements (504) are spaced apart inside the limiting groove (502). The lower surface of the flexible buffer plate (503) contacts the top of the elastic element (504). Two baffles (507) are connected to the base (501) and are located on both sides of the limiting groove (502). Multiple elastic elements (504) are spaced apart from top to bottom on the inner side of the baffle (507). An elastic strip is connected between the elastic element (504) and the baffle (507). The elastic element (504) is movably connected inside the side wall of the limiting groove (502).

8. The device according to claim 7, characterized in that, The locking member (505) has an inclined surface on the side near the elastic member (504).

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