CN222812708U - Three-point bending test device of Hopkinson pressure bar system for small components of building materials - Google Patents
Three-point bending test device of Hopkinson pressure bar system for small components of building materials Download PDFInfo
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- CN222812708U CN222812708U CN202421545213.8U CN202421545213U CN222812708U CN 222812708 U CN222812708 U CN 222812708U CN 202421545213 U CN202421545213 U CN 202421545213U CN 222812708 U CN222812708 U CN 222812708U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
本实用新型公开了建筑材料小构件霍普金森压杆系统三点弯曲试验装置，本方案巧妙性通过三点弯曲夹头来进行托持试样，以及利用夹头的一对压头与试样接触配合，再通过霍普金森压杆系统的入射杆施加作用力，使得试样在试验时，其被约束在霍普金森压杆系统的入射杆和与透射杆连接的三点弯曲夹头之间，本方案还巧妙性通过将一对所述压头设置成可拆卸调整间距的结构形式，使得本方案装置可以通过调整一对所述压头的间距来调整对时间的加载间距，其不仅结构简单，且实施可靠、应用灵活，可以应用在建筑材料小构件的动载试验中。
The utility model discloses a three-point bending test device of a Hopkinson pressure bar system for small components of building materials. The scheme ingeniously supports the sample through a three-point bending chuck, and utilizes a pair of pressure heads of the chuck to contact and cooperate with the sample, and then applies a force through an incident rod of the Hopkinson pressure bar system, so that the sample is constrained between the incident rod of the Hopkinson pressure bar system and the three-point bending chuck connected to the transmission rod during the test. The scheme also ingeniously arranges a pair of the pressure heads into a detachable spacing-adjustable structural form, so that the device of the scheme can adjust the time loading spacing by adjusting the spacing of the pair of the pressure heads. It not only has a simple structure, but also is reliable in implementation and flexible in application, and can be applied in dynamic load tests of small components of building materials.
Description
Technical Field
The utility model relates to the field of building material component detection devices, in particular to a three-point bending test device of a Hopkinson pressure bar system of a building material small component.
Background
In various projects today, a great deal of processes for destroying rock, soil and other materials are involved, and the stress waves generated by means of impact rock drilling, blasting, piling and the like can cause unstable destruction of surrounding fractured rock mass. It is therefore necessary to study the fracture behavior of these materials, so some researchers now conduct three-point bending experiments to explore the fracture toughness associated with the materials.
Currently, some researchers have also conducted some experimental studies and proposed some devices for assisting experiments in order to study the convenience and accuracy of the three-point bending experiment, for example, as follows:
(1) The inventor of the Chinese patent application CN201910264386.X designs a rock three-point bending fixture for size effect test, and the three-point bending test of each group of test pieces with larger size change on one fixture can be satisfied by changing a compression roller and a supporting roller to adapt to rock three-point bending tests with various sizes; the pressing head comprises a pressing head part and a supporting part arranged below the pressing head part, wherein the pressing head part comprises a pressing head body and a pressing roller, the pressing roller is arranged at the bottom of the pressing head body, the supporting part comprises supporting rollers, a movable support, a base and a guide rail platform, the two ends of the guide rail platform are respectively provided with one movable support, the movable support is connected with the guide rail platform through the base, the supporting rollers are further arranged on the movable support, and the movable support is symmetrically arranged on the guide platform by taking the pressing head body as a center.
(2) The inventor of Chinese patent application CN202320496157.2 has designed an adjustable three-point bending measuring tool base fulcrum, which comprises a base used as a connecting base, a through groove is formed in the center of the base, sliding grooves are symmetrically formed in the left side and the right side of the through groove, a limiting step is integrally formed in the center of the top of the base, two groups of adjusting parts are arranged and symmetrically connected to the base, the adjusting parts comprise a movable support seat which is slidably connected to the base, a sliding seat which is slidably matched with the sliding grooves is integrally formed in the bottom of the movable support seat, a positioning seat is connected to the front end of the movable support seat, a limiting groove which is matched with the limiting step is formed in the bottom of the positioning seat, a fixed side plate which is symmetrically connected to the front end and the rear end of the base is also provided with a differential head, and a differential head top rod extends to the inner side of the fixed side plate and drives the movable support seat to translate from the top of the base.
(3) The inventors of chinese patent application CN202010990976.3 have deposited great writer, wang Chenlong, jiao Zhiming devised a device that can regulate the temperature and pressure of the liquid or gas environment in which the sample is located, simulating the real environment in which the material is located. So as to enable the semicircular disc three-point bending device to measure the fracture toughness of the material in a warm-pressing environment. The whole device disclosed by the device is of an up-down structure, wherein the pressure head is arranged under the upper support and the lower support, the pressure head and the support are semi-cylindrical, and the axes are parallel to each other. The movable bottom plate is placed in the pressure kettle in an oriented manner, and the support and the sample clamping device for three-point bending are fixed on the bottom plate, so that a sample can be replaced through the movable bottom plate.
(4) The inventors Hu Lingbao, cao Xin, wang Fuzeng, etc. of the chinese patent application cn202210902717.X devised an automatic centering three-point bending test fixture. The clamp is used for extruding the sample placed on the first roller by arranging the extruding part in the middle of the pressure head, and meanwhile, the operating part can drive the sliding support to move under the operation of a user, so that the extruding part is always kept at the center position of the sample. Therefore, the problem that the existing three-point bending clamp does not have an automatic centering function and the position of the pressure head needs to be manually adjusted during a test is solved.
(5) The inventor Shaobing of chinese patent application CN202122930192.4 devised a novel three-point bending jig. The fixture has the advantages that the precision of carrying out fixed extrusion test on the test article is higher, the fixture is more convenient to replace according to the requirement, and the test article is convenient to detect. The clamp disclosed by the utility model comprises two symmetrical clamp and extrusion blocks, and further comprises support columns which are symmetrically arranged, wherein the upper ends of the two support columns are connected with a top plate, the lower ends of the two support columns are connected with support legs, the inner sides of the two support columns are connected with detachable placement tables, the upper side wall of each placement table is connected with a first sliding groove communicated with the two sides of the placement tables, the two ends of each first sliding groove are rotationally provided with a screw rod, the first sliding groove is internally connected with a rotating seat which is sleeved outside the screw rod, the placement tables are provided with a driving mechanism for the rotation of the screw rod, the lower ends of the two clamp are connected with first sliding blocks, the first sliding blocks are sleeved at the two ends of the screw rod through threads, and the first sliding blocks are propped against the inner wall of each first sliding groove.
(6) The inventor Shaobing of the chinese patent application CN202121311030.6 devised a novel self-balancing three-point bending experimental apparatus, which can accurately and automatically level when performing a three-point bending test to obtain more accurate experimental data. The device includes the base, and the top slidable mounting of base has two supports, and the centre gripping is installed the roller mount pad on two supports, and the roller is installed down at the top of roller mount pad, and the top of base is provided with the pressure head, and the screw thread is installed the roller on the pressure head, and goes up the roller and be located between two lower rollers.
In view of the above, most of the existing test devices have the following limitations:
disadvantages of the prior art:
① Most of the three-point bending devices at present are used in static load experiments, and can be applied to dynamic load experiments less frequently;
② At present, when most experimental devices are tested, a test piece is difficult to align with an instrument, and is easy to slide downwards to cause eccentric compression;
③ At present, most of the experimental devices cannot be directly installed on a Hopkinson bar in dynamic load experiments.
Disclosure of Invention
In view of the above, the utility model aims to provide a three-point bending test device of a small-component Hopkinson pressure bar system of a building material, which has the advantages of simple structure, reliable implementation and flexible application.
In order to achieve the technical purpose, the utility model adopts the following technical scheme:
the utility model provides a building material minor component hopkinson depression bar system three-point bending test device, includes the crooked chuck of three-point, crooked chuck of three-point is connected with the transmission pole of hopkinson depression bar system, and cooperates the effort to the sample with the incident pole of hopkinson depression bar system, crooked chuck of three-point includes:
One end surface of the connecting block is connected with a transmission rod of the Hopkinson pressure bar system;
the pressure heads are a pair and are oppositely arranged on the other end face of the connecting block;
The brackets are a pair, and the brackets are oppositely arranged on the other end face of the connecting block and are used for supporting a sample to be tested.
As a possible implementation manner, further, in this embodiment, a first mounting groove corresponding to the end structure of the transmission rod is provided on an end surface of the connection block.
As a preferred implementation option, preferably, the outer peripheral side of the connecting block is provided with a first clamping bolt which is threaded into the first mounting groove and is used for fixedly restraining the end part of the transmission rod in the first mounting groove.
As a preferred implementation option, preferably, the other end face of the connecting block is provided with a mounting block, and a pair of brackets are connected to the mounting block.
As a preferred implementation option, the bracket is preferably in a rod-shaped structure, one ends of a pair of brackets are rotatably connected to the mounting block, and the pair of brackets are respectively used for supporting the lower part of the sample.
As a preferred implementation choice, preferably, in the scheme, a transition block is arranged in the middle of the other end face of the connecting block, and a pair of pressure heads are oppositely arranged on the end face, far away from the connecting block, of the transition block.
As a preferred implementation choice, preferably, the end face, far away from the connecting block, of the transition block is provided with a U-shaped positioning groove, a positioning block is detachably arranged on the U-shaped positioning groove, two ends of the positioning block are symmetrically provided with a plurality of positioning holes which are mutually spaced, and a pair of pressure heads are detachably connected to the positioning holes of the positioning block.
As a preferred implementation choice, preferably, the positioning hole is a rectangular hole, the pressure head is in a shape like a Chinese character 'shan', the middle part of the pressure head is arranged in the positioning hole in a penetrating way, and two sides of the pressure head are respectively attached to the upper end face and the lower end face of the positioning block so as to limit the pressure head to be separated from the positioning block.
As a preferred implementation option, preferably, one side of the pressure head away from the connecting block is of an arc structure.
As a preferred implementation option, preferably, the transition block is connected with the connection block through a bolt, and the positioning block is connected with the transition block through a bolt.
Compared with the prior art, the test sample supporting device has the advantages that the test sample supporting device supports the test sample through the three-point bending clamp, a pair of pressure heads of the clamp are in contact fit with the test sample, and the incident rod of the Hopkinson pressure bar system is used for applying acting force, so that the test sample is restrained between the incident rod of the Hopkinson pressure bar system and the three-point bending clamp connected with the transmission rod during test, the pressure heads are arranged in a structure mode of detachably adjusting the distance, the device can adjust the loading distance of time through adjusting the distance of the pressure heads, and the test sample supporting device is simple in structure, reliable in implementation, flexible in application and applicable to dynamic load tests of small building material components.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a schematic three-dimensional view of a device according to the present embodiment;
FIG. 2 is a schematic view of a three-dimensional view of a simplified implementation of a three-point curved chuck of the present device;
FIG. 3 is a schematic diagram of a three-dimensional view of a simplified implementation of a three-point curved chuck of the apparatus of the present embodiment;
FIG. 4 is a schematic view of a three-dimensional perspective explosion of a schematic implementation of a three-point curved collet of the apparatus of the present embodiment;
fig. 5 is a schematic diagram of a press head of the device according to the present embodiment in a state of being briefly matched with a positioning block.
Detailed Description
The utility model is described in further detail below with reference to the drawings and examples. It is specifically noted that the following examples are only for illustrating the present utility model, but do not limit the scope of the present utility model. Likewise, the following examples are only some, but not all, of the examples of the present utility model, and all other examples, which a person of ordinary skill in the art would obtain without making any inventive effort, are within the scope of the present utility model.
As shown in one of fig. 1 to 4, a three-point bending test device for a small-component hopkinson pressure bar system of a building material according to the present utility model includes a three-point bending chuck 1, wherein the three-point bending chuck 1 is connected with a transmission rod 2 of the hopkinson pressure bar system and cooperates with an incident rod 3 of the hopkinson pressure bar system to apply a force to a sample 4, in this embodiment, the sample is a semicircular structure, a semicircular plane side of the sample cooperates with the three-point bending chuck 1, and a semicircular arc side of the sample contacts with the incident rod 3 of the hopkinson pressure bar system, wherein the three-point bending chuck 1 includes:
A connecting block 11, one end surface of which is connected with a transmission rod 2 of the Hopkinson pressure bar system;
the pressure heads 12 are a pair and are oppositely arranged on the other end face of the connecting block 11;
The pair of brackets 13 is provided, and the pair of brackets 13 is oppositely arranged at the other end face of the connecting block 11 and is used for holding the sample 4 to be tested.
In order to facilitate the cooperation with the transmission rod 2 of the hopkinson pressure rod system, as a possible implementation manner, further, a first mounting groove 111 (with an important point in fig. 3) corresponding to the end structure of the transmission rod 2 is arranged at one end surface of the connection block 11, and in order to improve the connection flexibility, as a preferred implementation option, it is preferable that a first clamping bolt 112 is arranged at the outer periphery side of the connection block 11, penetrating into the first mounting groove 111, and used for fixedly restraining the end of the transmission rod 2 in the first mounting groove 111.
In order to facilitate holding the sample 4, preferably, the other end face of the connecting block 11 is provided with a mounting block 131, and a pair of brackets 13 are connected to the mounting block 131, preferably, the brackets 13 may have a rod-shaped structure, one end of the pair of brackets 13 may be connected to the mounting block 131 in a manner of rotating relative to the rotating shaft 132, and the pair of brackets 13 are respectively used for holding the lower part of the sample 4.
In the installation of the pressure head 12, as a preferred implementation option, preferably, a transition block 14 is arranged in the middle of the other end face of the connecting block 11 in the scheme, the transition block 14 can be fixed on the connecting block 11 through bolts or welding, and a pair of pressure heads 12 are oppositely arranged on the end face of the transition block 14 away from the connecting block 11.
In addition to the above structural form, preferably, in this embodiment, a U-shaped positioning groove 141 is provided on an end surface of the transition block 14 away from the connecting block 11, and a positioning block 15 may be detachably provided on the U-shaped positioning groove 141, and the transition block 14 may be detachably provided with the positioning block 15 by using a bolt.
Because of different structures of different samples 4 and different experimental design conditions, the interval adjustment of a pair of pressure heads 12 can be used for exploring the performance condition of the test piece 4 under different loading intervals, and in order to conveniently adjust the positions of the pressure heads 12, the pressure heads 12 of the scheme can be arranged in a detachable structure, two ends of a positioning block 15 are symmetrically provided with a plurality of mutually-spaced positioning holes 151, the pair of pressure heads 12 are relatively detachably connected to the positioning holes 151 of the positioning block 15, and the positions of the pair of pressure heads 12 can be conveniently adjusted by presetting the positioning holes with corresponding intervals of 40mm, 60mm and 80mm as shown in the combination of fig. 5. The positioning block 15 and the transition block 14 are connected by bolts to facilitate disassembly, so that a positioning block 15 with a preset corresponding spacing of 30mm, 50mm and 70mm can be arranged for easy replacement.
Preferably, in this embodiment, the positioning hole 151 is a rectangular hole, the pressing head 12 is in a mountain shape, and a middle portion of the pressing head 12 is inserted into the positioning hole 151, and two sides of the pressing head 12 are respectively attached to an upper end surface and a lower end surface of the positioning block, so as to limit the pressing head 12 from being separated from the positioning block 15.
In the matching structure of the pressure head 12 and the sample 4, as a preferred implementation choice, preferably, one side of the pressure head 12 away from the connecting block is an arc structure.
When a small building material component is required to be subjected to a three-point bending test, taking a semicircular building material sample as an example, the connecting block 11 can be connected with the transmission rod 2 of the Hopkinson pressure bar system, then the sample 4 is placed on the bracket 13, the semicircular plane side of the sample is in contact fit with the pressure head 12 of the three-point bending chuck 1, the semicircular arc side of the sample is in contact with the incidence rod 3 of the Hopkinson pressure bar system, then the Hopkinson pressure bar system is started, the incidence rod 3 is matched with the transmission rod 2, acting force is generated on the sample 4 on the three-point bending chuck 1, at the moment, the contact part of the incidence rod 3 and the sample 4 forms an acting force point, and the contact part of the pressure head 12 and the sample 4 forms two acting force points, so that the three-point bending test is performed on the sample 4, and three-point bending impact performance data of the sample can be obtained.
The foregoing description is only a partial embodiment of the present utility model, and is not intended to limit the scope of the present utility model, and all equivalent devices or equivalent processes using the descriptions and the drawings of the present utility model or directly or indirectly applied to other related technical fields are included in the scope of the present utility model.
Claims (10)
1. The utility model provides a building material minor component hopkinson depression bar system three-point bending test device, includes the crooked chuck of three-point, crooked chuck of three-point is connected with the transmission pole of hopkinson depression bar system, and cooperates to exert effort to the sample with the incident pole of hopkinson depression bar system, its characterized in that, crooked chuck of three-point includes:
One end surface of the connecting block is connected with a transmission rod of the Hopkinson pressure bar system;
the pressure heads are a pair and are oppositely arranged on the other end face of the connecting block;
The brackets are a pair, and the brackets are oppositely arranged on the other end face of the connecting block and are used for supporting a sample to be tested.
2. The three-point bending test device for the small building material component hopkinson pressure bar system according to claim 1, wherein a first mounting groove which is matched with the end structure of the transmission rod is formed in one end surface of the connecting block.
3. The three-point bending test device for a small building material component hopkinson pressure bar system according to claim 2, wherein the outer circumferential side of the connecting block is provided with a first clamping bolt which is threaded into the first mounting groove and is used for fixedly restraining the end of the transmission rod in the first mounting groove.
4. The three-point bending test device for a small building material component hopkinson pressure bar system according to claim 1, wherein the other end surface of the connecting block is provided with a mounting block, and a pair of brackets are connected to the mounting block.
5. The three-point bending test device for a small building material component hopkinson pressure bar system set forth in claim 4, wherein the brackets are of a rod-like structure, one ends of a pair of the brackets are rotatably connected to the mounting block, and a pair of the brackets are respectively used for holding the lower parts of the test samples.
6. The three-point bending test device for a small building material component hopkinson pressure bar system according to any one of claims 1 to 5, wherein a transition block is arranged in the middle of the other end face of the connecting block, and a pair of pressure heads are oppositely arranged on the end face of the transition block far away from the connecting block.
7. The three-point bending test device for the Hopkinson pressure bar system of the small building material component according to claim 6, wherein the end face, far away from the connecting block, of the transition block is provided with a U-shaped positioning groove, a positioning block is detachably arranged on the U-shaped positioning groove, two ends of the positioning block are symmetrically provided with a plurality of positioning holes which are mutually spaced, and a pair of pressure heads are relatively detachably connected to the positioning holes of the positioning block.
8. The three-point bending test device for the Hopkinson pressure bar system of small building material members according to claim 7, wherein the positioning hole is a rectangular hole, the pressure head is in a mountain shape, the middle part of the pressure head is arranged in the positioning hole in a penetrating way, and two sides of the pressure head are respectively attached to the upper end face and the lower end face of the positioning block so as to limit the pressure head to be separated from the positioning block.
9. The three-point bending test device for the small building material component hopkinson pressure bar system of claim 8, wherein one side of the pressure head away from the connecting block is of an arc-shaped structure.
10. The three-point bending test device for the small building material component hopkinson pressure bar system of claim 7, wherein the transition block is connected with the connecting block through a bolt, and the positioning block is connected with the transition block through a bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202421545213.8U CN222812708U (en) | 2024-07-02 | 2024-07-02 | Three-point bending test device of Hopkinson pressure bar system for small components of building materials |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202421545213.8U CN222812708U (en) | 2024-07-02 | 2024-07-02 | Three-point bending test device of Hopkinson pressure bar system for small components of building materials |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN222812708U true CN222812708U (en) | 2025-04-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202421545213.8U Active CN222812708U (en) | 2024-07-02 | 2024-07-02 | Three-point bending test device of Hopkinson pressure bar system for small components of building materials |
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| Country | Link |
|---|---|
| CN (1) | CN222812708U (en) |
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- 2024-07-02 CN CN202421545213.8U patent/CN222812708U/en active Active
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