CN212871997U - Middle beam loading test device for inorganic binder fatigue test - Google Patents
Middle beam loading test device for inorganic binder fatigue test Download PDFInfo
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- CN212871997U CN212871997U CN202021053534.8U CN202021053534U CN212871997U CN 212871997 U CN212871997 U CN 212871997U CN 202021053534 U CN202021053534 U CN 202021053534U CN 212871997 U CN212871997 U CN 212871997U
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Abstract
The utility model discloses a well roof beam load test device of inorganic binder fatigue test, include: the base mechanism is located at the bottom, the protection mechanism is overlapped on the base mechanism, and the loading mechanism is located on the upper surface of the protection mechanism. The middle beam loading test device for the fatigue test of the inorganic binder is a device which enables stress in the fatigue test to be on one plane, is high in test result precision, is provided with a protection device in the test, protects equipment and workers from being injured under the damage condition, and enables stress to be uniform through flexible support.
Description
Technical Field
The utility model relates to a fatigue test field provides an inorganic binder fatigue test's well roof beam load test device very much.
Background
Semi-rigid base materials are used in highways because of their greater stiffness and greater load spreading capability. The cement stabilized macadam base is an important form of a semi-rigid base, and researches show that fatigue cracking is a main failure mode of a semi-rigid base pavement material, and the actual service life of an asphalt pavement caused by the fatigue cracking is usually shorter than the design life of 6-7 years, even short. The fatigue test is that a dynamic periodic compressive stress load mode of a Havesine wave is applied to a test piece under a certain stress level, the fatigue performance of the material is finally evaluated through the repeated action frequency (namely the fatigue life) of the load, and a basis is provided for the comparison and selection of the performances of the semi-rigid base layer materials of different roads. At present, a traditional cement concrete bending and pulling test device is generally subjected to a middle beam fatigue test after being transformed into a size, a support of the traditional test device is fixed by four-point support and is inflexible, if an error exists in a forming process of a tested piece, the four-point support can cause the bottom surface to be uneven, the stress is not on a plane, and the accuracy of a test result is influenced.
SUMMERY OF THE UTILITY MODEL
In view of this, in order to solve the above-mentioned problem, the utility model aims at providing a well roof beam load test device of inorganic binder fatigue test.
The utility model provides a technical scheme is: a middle beam loading test device for an inorganic binder fatigue test comprises: base mechanism, loading mechanism and protection machanism, base mechanism is located the below, protection machanism overlap joint be in on the base mechanism, loading mechanism is located the protection machanism upper surface, including in the base mechanism: bottom plate, a pressurization axle, three support, two pairs of extension springs and four pairs of spring hanger, every the support passes through bolt fixed connection on the bottom plate, and is a pair of pressurization axle is located threely support upper surface, and parallel placement each other, every a pressurization axle with the junction all is equipped with the steel ball between the support, four pairs of spring hanger is located a pair of respectively pressurization axle both ends department with bottom plate both sides both ends department, two pairs of extension springs are connected respectively at every vertical a pair between the spring hanger, including in the protection machanism: a pair of curb plate, connection diaphragm, fixed axle and displacement sensor fixed axle, connect diaphragm fixed connection between a pair of curb plate, and be located center department, it is a pair of the fixed axle sets up a pair of between the curb plate, and be located connect the diaphragm both sides, displacement sensor fixed axle fixed connection be in connect diaphragm upper surface one end, and the side surface is used for the overlap joint displacement sensor, it has the recess that is used for bearing displacement sensor lower extreme to connect diaphragm upper surface center department processing, including in the loading mechanism: the two-stage compression mechanism comprises a pair of two-stage compression shafts, four pairs of two-stage spring hooks, two pairs of two-stage tension springs, a loading plate, three loading supports and loading heads, wherein the two-stage compression shafts are arranged in parallel, the loading plate is positioned above the two-stage compression shafts, the two-stage compression shafts are connected with the lower surface of the loading plate through the three loading supports, steel balls are arranged at the mutual connection positions, the four-stage compression hooks are fixedly connected to two ends of the two-stage compression shafts and two ends of two sides of the loading plate respectively, and the two pairs of two-stage tension springs are positioned between every vertical pair of the two-stage compression hooks respectively.
Preferably, notches for bearing the second pressurizing shaft are machined at two ends of the upper surface of each side plate.
Further preferably, each of the second pressing shafts has a length longer than a distance between the pair of side plates.
Preferably, each of the first tension spring and the second tension spring is a tension spring with high rigidity.
Further preferably, the length of each tension spring I is smaller than that of each tension spring II.
The utility model provides a well roof beam load test device of inorganic binder fatigue test, one kind makes the atress in fatigue test at a plane, and the test result precision is high, is experimenting and being equipped with protection device, and the protection is injury equipment and staff under the destruction circumstances, and nimble support makes the even device of atress.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and embodiments:
FIG. 1 is a schematic structural diagram of a center sill loading test device for an inorganic binder fatigue test;
FIG. 2 is a perspective view of the bottom plate, the first pressing shaft, the support, the first tension spring and the first spring hook in the center sill loading test device for the fatigue test of the inorganic binder, which are matched with each other;
FIG. 3 is a perspective view of the combination of the second pressing shaft, the second spring hook, the second tension spring, the loading plate, the loading head and the loading support in the inorganic binder fatigue test center sill loading test apparatus;
FIG. 4 is a perspective view of the side plates, the connecting transverse plate, the fixing shaft and the displacement sensor fixing shaft of the center sill loading test device for the fatigue test of the inorganic binder, which are matched with each other;
FIG. 5 is a side sectional view of the first pressing shaft, the support and the steel ball at the joint in the middle beam loading test device for the fatigue test of the inorganic binder;
FIG. 6 is a side view of the bottom plate, the first pressing shaft, the support, the first tension spring and the first spring hook in the center sill loading test device for the fatigue test of the inorganic binder, which are matched with each other;
FIG. 7 is a right side view of the side plate, the fixed shaft, the second pressing shaft, the second spring hook, the second tension spring, the loading plate, the loading head and the loading support in the middle beam loading test device for fatigue testing of inorganic binder, which is matched with each other;
FIG. 8 is a left side view of the side plate, the fixed shaft, the second pressing shaft, the second spring hook, the second tension spring, the loading plate, the loading head and the loading support in the middle beam loading test device for fatigue testing of inorganic binder;
in the figure: 1. a base plate; 2. a first pressure shaft; 3. a support; 4. a first tension spring; 5. a first spring hook; 6. a side plate; 7. connecting the transverse plates; 8. a fixed shaft; 9. a displacement sensor fixing shaft; 10. a second pressure shaft; 11. a second spring hook; 12. a second tension spring; 13. a loading plate; 14. a loading head; 15. And loading the support.
Detailed Description
The invention will be further explained below with reference to specific embodiments, without limiting the invention.
As shown in fig. 1-8, the utility model provides a well roof beam load test device of inorganic binder fatigue test, include: base mechanism, loading mechanism and protection machanism, base mechanism is located the below, protection machanism overlap joint be in on the base mechanism, loading mechanism is located the protection machanism upper surface, including in the base mechanism: bottom plate 1, a pair of pressurization axle 2, three support 3, two pairs of extension springs 4 and four pairs of spring hanger 5, every support 3 passes through bolt fixed connection on bottom plate 1, and is a pair of pressurization axle 2 is located three 3 upper surfaces of support, and parallel placement each other, every pressurization axle 2 with the junction all is equipped with the steel ball between the support 3, and four are right a spring hanger 5 is located a pair of respectively pressurization axle 2 both ends department with 1 both sides both ends department of bottom plate, two pairs of extension spring 4 is connected respectively at every vertical a pair between a spring hanger 5, including in the protection machanism: a pair of curb plate 6, connection diaphragm 7, fixed axle 8 and displacement sensor fixed axle 9, connect diaphragm 7 fixed connection between a pair of curb plate 6, and be located center department, it is a pair of fixed axle 8 sets up a pair of between the curb plate 6, and be located connect diaphragm 7 both sides, displacement sensor fixed axle 9 fixed connection be in connect diaphragm 7 upper surface one end, and the side surface is used for the overlap joint displacement sensor, it has the recess that is used for bearing the displacement sensor lower extreme to connect diaphragm 7 upper surface center department processing, including in the loading mechanism: a pair of second pressurizing shafts 10, four pairs of second spring hooks 11, two pairs of second tension springs 12, a loading plate 13, three loading supports 15 and a loading head 14, wherein the pair of second pressurizing shafts 10 are placed in parallel, the loading plate 13 is positioned above the pair of second pressurizing shafts 10, the pair of second pressurizing shafts 10 are connected with the lower surface of the loading plate 13 through the three loading supports 15, steel balls are arranged at the mutual connection positions, the four pairs of second spring hooks 11 are respectively and fixedly connected with two ends of the pair of second pressurizing shafts 10 and two ends of two sides of the loading plate 13, the two pairs of second tension springs 12 are respectively positioned between each vertical pair of second spring hooks 11, when the device is used, a piece to be measured, namely a road course sample, is placed between the pair of side plates 6 for clamping, wherein the pair of side plates 6 clamp the two ends of the piece to be measured, therefore, when the tested piece is pressed upwards, the middle of the tested piece is broken, the tested piece cannot crack, and the damage to an operator is avoided, wherein the two ends of the pair of side plates 6 are connected through the pair of fixing shafts 8, the distance between the pair of side plates 6 is convenient to limit, so that the protection effect is good, wherein the fixing shafts 8 only play a role of connection, including but not limited to hollow round shafts or solid round shafts, the tested piece is placed on the upper surface of the pair of first pressurizing shafts 2, one first pressurizing shaft 2 is connected with the upper surface of the bottom plate 1 through the support 3, the other first pressurizing shaft 2 is connected with the upper surface of the bottom plate 1 through the pair of supports 3, and the support is more flexible due to the triangular support points compared with four-corner support, wherein the triangular support points can also be of a simple beam type in a building, so that the support is convenient to flexibly support well, wherein, the connecting part between each support 3 and the first pressurizing shaft 2 is provided with a steel ball, which is convenient for bearing the deviation properly when the supporting strength is satisfied, so that the measurement is more flexible, wherein the bottom plate 1 has the function of bearing conveniently, the device is placed in a machine utilizing external pressure conveniently, when a pressure test is carried out, an external pressure machine is required to be connected with a loading head 14 in the device, according to the figure, the loading head 14 is circular, as most of the external pressure machines are applied with hydraulic force, the hydraulic force application end is cylindrical, therefore, the circular loading head 14 is convenient for being sleeved outside the cylindrical of the external hydraulic force application end, the fixation is good, the deviation is avoided, the force application is stable, wherein, two ends of each first pressurizing shaft 2 are connected with the side surface of the bottom plate 1 through a first tension spring 4, the device is convenient to support with three points of three supports 3 together, can only shift up and down, does not shake on the left and right, meets the requirement of uniform force application, and is good in detection, wherein two ends of each first tension spring 4 are connected with the corresponding first pressing shaft 2 or the side surface of the bottom plate 1 through a first spring hook 5, so that the connection is good, two ends of each first pressing shaft 2 are provided with convex cylinders capable of placing the first spring hook 5, and the side surface of the bottom plate 1 is also provided with corresponding convex cylinders, wherein when force is applied, a loading plate 13 and three loading supports 15 are applied to the upper surfaces of a pair of second pressing shafts 10, and the loaded force is transmitted downwards through the pair of second pressing shafts 10, wherein the setting of the three loading supports 15 is the same as the setting principle of the three supports 3, according to the condition shown in figure 1, the three supports 3 and the three loading supports 15 are arranged oppositely, so that the force application is more uniform, wherein the loading plate 13 is only used for fixing the upper ends of the three loading supports 15, so that the force application is uniform, wherein the steel balls which are arranged at the upper end and the lower end of each loading support 15 and between each second pressurizing shaft 10 and the loading plate 13 have the same action as the steel balls between the first pressurizing shaft 2 and the supports 3, so that the flexible force application is realized, because the two ends of each second pressurizing shaft 10 are both longer than the width of the front part of the pair of side plates 6, namely longer than the length of the fixing shaft 8, the second pressurizing shaft 10 is well clamped, the downward force application is convenient, wherein the second tension spring 12 which is arranged between the loading plate 13 and each second pressurizing shaft 10 has the same action as the first tension spring 4 and only plays a role of movable connection, and the two ends of each second tension spring 12 are respectively connected with the side surface of the loading plate 13 and the end surface of the second pressurizing shaft 10 through a second spring hook 11 The connection is the same as the function of the first spring hook 5, only plays a role of facilitating the connection, namely convex cylinders are arranged on the side surface of the loading plate 13 and the end surface of each second pressurizing shaft 10, so that the second spring hook 11 is clamped and stably connected, before force is applied, an external displacement sensor is placed in a round hole in the center of the upper surface of the connecting transverse plate 7, the side surface is lapped on the side surface of a displacement sensor fixing shaft 9 positioned at one end of the upper surface of the connecting transverse plate 7, so that the displacement sensor is well fixed, the connection relation between the displacement sensor fixing shaft 9 comprises but is not limited to binding and the like, wherein the connecting transverse plate 7 is used for connecting the centers of the pair of laminated plates 6 and is also convenient for bearing the displacement sensor, after the displacement sensor is installed, the upper end of the force is downwards extruded and is applied with force through the pair of second pressurizing shafts 10, the two ends of the tested piece are pressed downwards, namely the tested piece is bent downwards in the center, wherein the detection end of the displacement sensor is lapped on the upper surface of the tested piece, so that the deformation quantity of the tested piece generated in the extrusion of different degrees can be detected in the extrusion of different degrees, the detected condition is transmitted to a pre-connected application background, namely an external computer, so that the detection result of each time is displayed on the computer and is convenient to observe, the force application extrusion side view is carried out aiming at each layer in a road structure, the maximum force application condition borne by the tested piece under the condition of different force application conditions is measured, a pressure curve can be drawn through a plurality of experiments of different degrees, the maximum fatigue condition of the tested piece is convenient to know, wherein the tested piece is a reduced version of each layer when an actual road is constructed, the lower end face of each side plate 6 is not overlapped with the first pressurizing shaft 2, so that a gap is reserved to adapt to force application bending and the like.
As can be seen from fig. 1 to 8 of the specification, the two ends of the upper surface of each side plate 6 are respectively provided with a notch for bearing the second pressurizing shaft 10, and the notches are set so as to facilitate the two ends of each second pressurizing shaft 10 to be placed inside the notches, and because most of each second pressurizing shaft 10 is located in the notches, the notches facilitate appropriate restriction on the left and right sides of the second pressurizing shaft 10, thereby preventing the second pressurizing shaft 10 from shifting when downward extrusion force is applied.
As can be seen from fig. 1 to 8 of the specification, the length of each second pressing shaft 10 is longer than the distance between the pair of side plates 6, and because the length is longer than the distance between the pair of side plates 6, the entire lower surface of each second pressing shaft 10 is not overlapped with the upper surface of the measured device to be forced, but the two ends of the second pressing shaft 10 are limited by each pair of notches to be pressed in an overlapping manner, so that the displacement is prevented.
As can be seen from the attached figures 1-8 in the specification, each of the first tension spring 4 and the second tension spring 12 is a tension spring with high rigidity, and is not easy to stretch or bend due to high rigidity, so that the integral connection strength can be ensured when the flexible supporting effect is met.
As can be known from the attached figures 1-8 in the specification, the length of each tension spring 4 is smaller than that of the tension spring 12, the force application end needs to well transfer the force application, so that the proper height is selected, the force application is convenient, the height of the tension spring 4 at the bottom plate 1 at the lower end is near to the height for supporting connection, the installation is saved for a short time, and the support is better attached to the bottom surface and is well fixed.
The embodiments of the present invention are written in a progressive manner, emphasizing the differences of the various embodiments, and similar parts can be referred to each other.
The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
Claims (5)
1. A middle beam loading test device for an inorganic binder fatigue test comprises: base mechanism, loading mechanism and protection machanism, base mechanism is located the below, the protection machanism overlap joint be in on the base mechanism, loading mechanism is located the protection machanism upper surface, its characterized in that, including in the base mechanism: bottom plate (1), one to one add pressure shaft (2), three support (3), two pairs of extension springs (4) and four to spring hanger (5), every support (3) are through bolt fixed connection on bottom plate (1), and is a pair of one add pressure shaft (2) and be located three support (3) upper surface, and parallel placement each other, every add pressure shaft (2) with the junction all is equipped with the steel ball between support (3), four pairs spring hanger (5) are located a pair of respectively add pressure shaft (2) both ends department with bottom plate (1) both sides both ends department, two pairs extension springs (4) are connected respectively at every vertical a pair between spring hanger (5), including in the protection machanism: a pair of curb plate (6), connection diaphragm (7), fixed axle (8) and displacement sensor fixed axle (9), connect diaphragm (7) fixed connection between a pair of curb plate (6) and be located central department, it is a pair of fixed axle (8) set up a pair of between curb plate (6) and be located connect diaphragm (7) both sides, displacement sensor fixed axle (9) fixed connection be in connect diaphragm (7) upper surface one end, and the side surface is used for the overlap joint displacement sensor, it is useful in order to bear to connect diaphragm (7) upper surface center department processing the recess of displacement sensor lower extreme, including in the loading mechanism: the double-spring loading device comprises a pair of second pressurizing shafts (10), four pairs of second spring hooks (11), two pairs of second tension springs (12), a loading plate (13), three loading supports (15) and a loading head (14), wherein the second pressurizing shafts (10) are arranged in parallel, the loading plate (13) is positioned above the second pressurizing shafts (10), the second pressurizing shafts (10) are connected with the lower surface of the loading plate (13) through the three loading supports (15), steel balls are arranged at the connecting positions of the second pressurizing shafts (10) and the loading plate (13), the four pairs of second spring hooks (11) are fixedly connected to two ends of the second pressurizing shafts (10) and two ends of two sides of the loading plate (13), and the two pairs of second tension springs (12) are positioned between every vertical pair of second spring hooks (11).
2. The inorganic binder fatigue test center sill load test device according to claim 1, wherein notches for bearing the second pressing shaft (10) are processed at two ends of the upper surface of each side plate (6).
3. The center sill load test device for the inorganic binder fatigue test as claimed in claim 1, wherein the length of each second pressing shaft (10) is longer than the distance between a pair of the side plates (6).
4. The center sill loading test device for the inorganic binder fatigue test as recited in claim 1, wherein each of the first tension spring (4) and the second tension spring (12) is a tension spring with high rigidity.
5. The center sill loading test device for inorganic binder fatigue test as claimed in claim 1, wherein the length of each tension spring (4) is less than the length of the tension spring (12).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021053534.8U CN212871997U (en) | 2020-06-10 | 2020-06-10 | Middle beam loading test device for inorganic binder fatigue test |
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| CN202021053534.8U CN212871997U (en) | 2020-06-10 | 2020-06-10 | Middle beam loading test device for inorganic binder fatigue test |
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| CN212871997U true CN212871997U (en) | 2021-04-02 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114441323A (en) * | 2021-12-24 | 2022-05-06 | 中国商用飞机有限责任公司北京民用飞机技术研究中心 | Double-acting-cylinder coordinated loading test bed and coordinated loading test method |
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2020
- 2020-06-10 CN CN202021053534.8U patent/CN212871997U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114441323A (en) * | 2021-12-24 | 2022-05-06 | 中国商用飞机有限责任公司北京民用飞机技术研究中心 | Double-acting-cylinder coordinated loading test bed and coordinated loading test method |
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