CN117405512A - Loading test device for synergistic action of double L-shaped beams and parallel four-bar linkages - Google Patents
Loading test device for synergistic action of double L-shaped beams and parallel four-bar linkages Download PDFInfo
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- CN117405512A CN117405512A CN202311352596.7A CN202311352596A CN117405512A CN 117405512 A CN117405512 A CN 117405512A CN 202311352596 A CN202311352596 A CN 202311352596A CN 117405512 A CN117405512 A CN 117405512A
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- 230000002195 synergetic effect Effects 0.000 title claims abstract description 15
- 230000007246 mechanism Effects 0.000 claims abstract description 28
- 229910000831 Steel Inorganic materials 0.000 claims description 53
- 239000010959 steel Substances 0.000 claims description 53
- 230000009977 dual effect Effects 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- -1 polytetrafluoroethylene Polymers 0.000 claims description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 3
- 238000005452 bending Methods 0.000 abstract description 9
- 238000000034 method Methods 0.000 abstract description 9
- 230000008569 process Effects 0.000 abstract description 6
- 230000003068 static effect Effects 0.000 abstract description 5
- 230000009471 action Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 230000001105 regulatory effect Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
Abstract
The invention relates to a loading test device with a double L-shaped beam and parallel four-bar linkage in a synergistic effect. The technical proposal is as follows: the device comprises an L-shaped bottom beam, an L-shaped loading beam, a parallel four-bar mechanism, a portal frame, a pulley lifting mechanism, a horizontal sliding block, a vertical hydraulic jack and a horizontal actuator, wherein the L-shaped bottom beam is arranged on the ground, and the L-shaped loading beam is connected with the L-shaped bottom beam through the parallel four-bar mechanism; the portal frame consists of four upright posts and a top plate, the pulley lifting mechanism is arranged above the top plate, and the horizontal sliding block is arranged below the top plate; the fixed end of the vertical hydraulic jack is fixedly connected with the horizontal sliding block, the free end of the vertical hydraulic jack is fixedly connected with the L-shaped loading beam, and vertical pressure is applied to the test piece through the L-shaped loading beam; the fixed end of the horizontal actuator is fixedly connected with the L-shaped bottom beam, and the free end of the horizontal actuator is fixedly connected with the L-shaped loading beam. The invention can solve the problem of inaccurate results caused by bending of the test piece in the pseudo static test process.
Description
Technical Field
The invention belongs to the field of civil engineering quasi-static force test, and particularly relates to a loading test device for the synergistic effect of a double L-shaped beam and parallel four-bar links.
Background
The quasi-static test is also called as a low-cycle repeated load test, and refers to a static test for applying repeated reciprocating cyclic action to a structure or a structural member, and is a process for repeatedly loading and unloading the structure or the structural member in the forward and reverse directions, so as to simulate the stress characteristic and the deformation characteristic of the structure in reciprocating vibration during earthquake. When a pseudo static test is carried out, a commonly used test device is formed by combining a test stand, a counter-force wall, a portal frame, a reciprocating actuator, a jack and the like. The counterforce wall has important functions in static force test, but has the defects of high cost, complex installation, short service life, limited use space and the like. When a test piece is placed, the height of the L-shaped loading beam is required to be adjusted according to the height of the test piece, and the L-shaped loading Liang Taigao is very complex and has great potential safety hazard. In the quasi-static test process, the test piece can generate horizontal push/pull force and clockwise/anticlockwise bending moment under the action of reciprocating force, and the bending moment can cause the test piece to be bent, so that the test piece is not in line with the stress state of the structure under the action of earthquake. In the quasi-static test process, if the L-shaped beam and the parallel four-bar linkage cannot work cooperatively or are poor in cooperation, the accuracy of the test can be seriously affected.
Disclosure of Invention
The invention provides a loading test device with a synergistic effect of double L-shaped beams and parallel four connecting rods, which can effectively solve the problem of inaccurate results caused by bending of a test piece in a quasi-static test process.
The technical scheme of the invention is as follows:
the loading test device comprises an L-shaped bottom beam, an L-shaped loading beam, a parallel four-bar mechanism, a portal frame, a pulley lifting mechanism, a horizontal sliding block, a vertical hydraulic jack and a horizontal actuator, wherein the long side of the L-shaped bottom beam is arranged on the ground, the L-shaped loading beam is arranged above the L-shaped bottom beam, and the L-shaped loading beam and the L-shaped bottom beam are connected together through the parallel four-bar mechanism; the portal frame consists of four upright posts and a top plate, wherein the four upright posts are arranged on the ground, two upright posts are respectively arranged in front of and behind the long side of the L-shaped bottom beam, and the top plate is arranged at the top ends of the four upright posts; the pulley lifting mechanism is arranged above the top plate, and the horizontal sliding block is arranged below the top plate; the fixed end of the vertical hydraulic jack is fixedly connected with the horizontal sliding block, the free end of the vertical hydraulic jack is fixedly connected with the long side of the L-shaped loading beam, and vertical pressure is applied to the test piece through the L-shaped loading beam; the fixed end of the horizontal actuator is fixedly connected with the short side of the L-shaped bottom beam, and the free end of the horizontal actuator is fixedly connected with the short side of the L-shaped loading beam.
Further, the loading test device with the synergistic effect of the double L-shaped beams and the parallel four connecting rods comprises a connecting hinge A, a connecting hinge B, a connecting hinge C, a connecting hinge D, a connecting hinge E, a connecting hinge F, a connecting rod AC, a connecting rod BD, a connecting rod CE, a connecting rod DF and a connecting beam CD; the connecting hinge A is connected with the connecting rod AC and the L-shaped bottom beam, the connecting hinge B is connected with the connecting rod BD and the L-shaped bottom beam, the connecting hinge C is connected with the connecting rod AC and the connecting rod CE, the connecting hinge D is connected with the connecting rod BD and the connecting rod DF, the connecting hinge E is connected with the connecting rod CE and the L-shaped loading beam, the connecting hinge F is connected with the connecting rod DF and the L-shaped loading beam, and the two ends of the connecting beam CD are the connecting hinge C and the connecting hinge D.
Further, the double L-shaped beam and parallel four-bar linkage load test device has the advantages that the connecting bars AC, the connecting bars BD, the connecting bars CE and the connecting bars DF are I-shaped steel, and the lengths and the section thicknesses of the connecting bars AC, the connecting bars BD, the connecting bars CE and the connecting bars DF are the same; the connecting beam CD is a combined section steel.
Further, the double L-shaped beam and parallel four-bar linkage load test device is characterized in that the upright posts are I-shaped steel, and a base is arranged below the upright posts.
Further, the pulley lifting mechanism comprises a front tripod, a rear tripod, a lapping rod, a pulley block, a rotating spool, a steel strand I, a steel strand II, a steel strand III, a fixed pulley II, a fixed pulley III, a left hook and a right hook; two footings of the front tripod and the rear tripod are fixedly arranged on the top plate, two ends of the lap joint rod are fixedly connected with the top angles of the front tripod and the rear tripod respectively, and the front tripod, the rear tripod and the lap joint rod are combined into a pulley block hanging bracket; the pulley block consists of a fixed pulley I and a movable pulley, and the fixed pulley I is hung on the lap joint rod; the rotating spool is fixedly arranged on the top plate; one end of the steel strand I is fixedly connected with the fixed pulley I, the steel strand I is firstly wound on the movable pulley downwards, then wound on the fixed pulley I upwards, and finally wound on the rotary spool, and the other end of the steel strand I is fixedly connected with the rotary spool; the rotating spool can be manually regulated and controlled, the rotating spool automatically winds the steel strand I on the shaft rod of the L-shaped loading beam when the L-shaped loading beam is lifted, and the rotating spool automatically releases the steel strand I from the shaft rod of the L-shaped loading beam when the L-shaped loading beam is lowered; the fixed pulley I can change the pulling force direction of lifting the L-shaped loading beam, and the movable pulley can save the force of lifting the L-shaped loading beam; the fixed pulley II is fixedly arranged at the left end of the top plate, the fixed pulley III is fixedly arranged at the right end of the top plate, the left hook is fixedly arranged at the left part of the long side of the L-shaped loading beam, and the right hook is fixedly arranged at the right part of the long side of the L-shaped loading beam; one ends of the steel strand II and the steel strand III are fixedly connected with the movable pulley, the other end of the steel strand II is connected with the left hook after passing through the fixed pulley II, and the other end of the steel strand III is connected with the right hook after passing through the fixed pulley III.
Further, the double L-shaped beam and parallel four-bar linkage load test device is characterized in that the lower surface of the top plate is a smooth surface and is provided with a sliding guide rail, the upper surface of the horizontal sliding block is a smooth surface and is provided with a sliding protrusion, and the sliding protrusion and the sliding guide rail are mounted together in a matched mode.
Further, the double L-shaped beam and the parallel four-bar linkage cooperate to form a loading test device, and the smooth surface material is polytetrafluoroethylene.
The beneficial effects of the invention are as follows: the invention solves the prior technical problems that the counterforce wall is complex to install and the use space is limited by replacing the counterforce wall with the short side of the L-shaped bottom beam; the problem of inaccurate results caused by bending of the test piece in the pseudo static test process can be effectively solved by adopting the parallel four-bar mechanism; the problem that a test piece generates clockwise/anticlockwise bending moment under the action of reciprocating force is solved by the cooperative work of the double L-shaped beams and the parallel four-bar mechanism; the problem that the L-shaped beam and the parallel four-bar mechanism cannot work cooperatively or are poor in cooperativity is solved by movably hinging the L-shaped beam with the parallel four-bar mechanism and the connecting rods in the parallel four-bar mechanism; the L-shaped loading beam is lifted by the pulley lifting mechanism, so that a test piece can be conveniently placed, the step of placing the test piece can be effectively simplified, the potential safety hazard is reduced, and the problem of complex operation of placing the test piece is solved. The invention is used for the quasi-static test of the shear wall structure, can also be used for the quasi-static test of components such as a concrete beam, a concrete column, a steel structure truss and the like, and improves the universality.
Drawings
FIG. 1 is a schematic diagram of a load test apparatus in which a dual L-beam cooperates with parallel four-bar linkages;
FIG. 2 is a schematic diagram of a parallel four bar linkage;
FIG. 3 is a schematic diagram of the mounting relationship of the pulley lifting mechanism to the L-shaped load beam;
FIG. 4 is an enlarged view of FIG. 3 at A;
FIG. 5 is an enlarged view of FIG. 4 at B;
FIG. 6 is a schematic diagram of the horizontal slider, vertical hydraulic jack and roof mounting relationship;
FIG. 7 is a schematic diagram of the load test apparatus with dual L-beams cooperating with parallel four-bar linkages.
Detailed Description
1-6, a loading test device with the synergistic effect of double L-shaped beams and parallel four-bar linkages comprises an L-shaped bottom beam 1, an L-shaped loading beam 2, a parallel four-bar linkage 3, a portal frame 4, a pulley lifting mechanism 5, a horizontal sliding block 6, a vertical hydraulic jack 7 and a horizontal actuator 8, wherein the long side of the L-shaped bottom beam 1 is arranged on the ground, the L-shaped loading beam 2 is arranged above the L-shaped bottom beam 1, and the L-shaped loading beam 2 and the L-shaped bottom beam 1 are connected together through the parallel four-bar linkage 3; the portal frame 4 consists of four upright posts and a top plate 4-1, wherein the four upright posts are arranged on the ground, two upright posts are respectively arranged in front of and behind the long side of the L-shaped bottom beam 1, the upright posts are I-shaped steel, a base is arranged below the upright posts, and the top plate 4-1 is arranged at the top ends of the four upright posts; the pulley lifting mechanism 5 is arranged above the top plate 4-1, and the horizontal sliding block 6 is arranged below the top plate 4-1; the fixed end of the vertical hydraulic jack 7 is fixedly connected with the horizontal sliding block 6, the free end of the vertical hydraulic jack 7 is fixedly connected with the long side of the L-shaped loading beam 2, and vertical pressure is applied to the test piece 9 through the L-shaped loading beam 2; the fixed end of the horizontal actuator 8 is fixedly connected with the short side of the L-shaped bottom beam 1, and the free end of the horizontal actuator 8 is fixedly connected with the short side of the L-shaped loading beam 2.
The parallel four-bar mechanism 3 comprises a connecting hinge A3-1, a connecting hinge B3-2, a connecting hinge C3-3, a connecting hinge D3-4, a connecting hinge E3-5, a connecting hinge F3-6, a connecting rod AC3-7, a connecting rod BD3-8, a connecting rod CE3-9, a connecting rod DF3-10 and a connecting beam CD3-11; the connecting hinge A3-1 is connected with the connecting rod AC3-7 and the L-shaped bottom beam 1, the connecting hinge B3-2 is connected with the connecting rod BD3-8 and the L-shaped bottom beam 1, the connecting hinge C3-3 is connected with the connecting rod AC3-7 and the connecting rod CE3-9, the connecting hinge D3-4 is connected with the connecting rod BD3-8 and the connecting rod DF3-10, the connecting hinge E3-5 is connected with the connecting rod CE3-9 and the L-shaped loading beam 2, the connecting hinge F3-6 is connected with the connecting rod DF3-10 and the L-shaped loading beam 2, and the connecting hinges C3-3 and the connecting hinges D3-4 are arranged at two ends of the connecting cross beam CD 3-11. The connecting rods AC3-7, the connecting rods BD3-8, the connecting rods CE3-9 and the connecting rods DF3-10 are all I-shaped steel, and the lengths and the section thicknesses of the connecting rods AC3-7, the connecting rods BD3-8, the connecting rods CE3-9 and the connecting rods DF3-10 are the same; the connecting cross beam CD3-11 is a combined section steel. The connecting hinge needs to be coated with industrial lubricating oil during the test.
The pulley lifting mechanism 5 comprises a front tripod 5-1, a rear tripod 5-2, a connecting rod 5-3, a pulley block, a rotating spool 5-5, a steel strand I, a steel strand II, a steel strand III, a fixed pulley II 5-6, a fixed pulley III 5-7, a left hook 5-8 and a right hook 5-9; two feet of the front tripod 5-1 and the rear tripod 5-2 are fixedly arranged on the top plate 4-1, two ends of the lap joint rod 5-3 are fixedly connected with top angles of the front tripod 5-1 and the rear tripod 5-2 respectively, and the front tripod 5-1, the rear tripod 5-2 and the lap joint rod 5-3 form a pulley block hanging bracket; the pulley block consists of a fixed pulley I5-4-1 and a movable pulley 5-4-2, and the fixed pulley I5-4-1 is hung on the lap joint rod 5-3; the rotating spool 5-5 is fixedly arranged on the top plate 4-1; one end of the steel strand I is fixedly connected with the fixed pulley I5-4-1, the steel strand I is firstly downwards wound on the movable pulley 5-4-2, then upwards wound on the fixed pulley I5-4-1 and finally wound on the rotary spool 5-5, and the other end of the steel strand I is fixedly connected with the rotary spool 5-5; the rotating spool 5-5 can be manually regulated and controlled, when the L-shaped loading beam 2 is lifted, the rotating spool 5-5 automatically winds the steel strand I on the shaft rod of the L-shaped loading beam, and when the L-shaped loading beam 2 is lowered, the rotating spool 5-5 automatically releases the steel strand I from the shaft rod of the L-shaped loading beam; the fixed pulley I5-4-1 can change the pulling force direction of lifting the L-shaped loading beam 2, and the movable pulley 5-4-2 can save the force of lifting the L-shaped loading beam 2; the fixed pulley II 5-6 is fixedly arranged at the left end of the top plate 4-1, the fixed pulley III 5-7 is fixedly arranged at the right end of the top plate 4-1, the left hook 5-8 is fixedly arranged at the left part of the long side of the L-shaped loading beam 2, and the right hook 5-9 is fixedly arranged at the right part of the long side of the L-shaped loading beam 2; one ends of a steel strand II and a steel strand III are fixedly connected with the movable pulley 5-4-2, the other end of the steel strand II is connected with the left hook 5-8 after passing through the fixed pulley II 5-6, and the other end of the steel strand III is connected with the right hook 5-9 after passing through the fixed pulley III 5-7.
The lower surface of the top plate 4-1 is a smooth surface and is provided with a sliding guide rail 4-1-1, the upper surface of the horizontal sliding block 6 is a smooth surface and is provided with a sliding protrusion 6-1, and the sliding protrusion 6-1 and the sliding rail 4-1-1 are matched and installed together; the smooth surface material is polytetrafluoroethylene.
The specific operation steps of the loading test device with the synergistic effect of the double L-shaped beams and the parallel four connecting rods are as follows:
1) Adjusting the upright post position of the portal frame 4 and installing a top plate 4-1; the height of the L-shaped loading beam 2 is adjusted by using a pulley lifting mechanism 5 according to the height of the test piece 9; the test piece 9 is placed between the L-shaped bottom beam 1 and the L-shaped loading beam 2; adjusting the contact position of the L-shaped loading beam 2 and the test piece 9;
one ends of a steel strand II and a steel strand III are fixedly connected with the movable pulley 5-4-2, the other end of the steel strand II is connected with the left hook 5-8 after passing through the fixed pulley II 5-6, and the other end of the steel strand III is connected with the right hook 5-9 after passing through the fixed pulley III 5-7; regulating and controlling the rotary spool 5-5 to enable the steel strand to be wound on the spool, and lifting the L-shaped loading beam 2; placing a test piece 9 and adjusting the position of the test piece 9; regulating and controlling the rotary spool 5-5 to pay out the steel strand wound on the spool, and lowering the L-shaped loading beam 2; the L-shaped loading beam 2 is slowly lowered, and the rotating spool 5-5 is closed after the downward surface of the L-shaped loading beam 2 is attached to the upper surface of the test piece 9; the connection between the steel strand II and the left hook 5-8 and the connection between the steel strand III and the right hook 5-9 are released;
2) A horizontal sliding block 6 and a vertical hydraulic jack 7 are installed; starting a vertical hydraulic jack 7 to adjust the positions of the horizontal sliding block 6 and the vertical hydraulic jack 7; closing the vertical hydraulic jack 7 and installing the horizontal actuator 8; starting a vertical hydraulic jack 7 to apply a vertical load, loading the vertical load to a test requirement load, and keeping the vertical acting force unchanged, so as to realize the effect of applying constant vertical pressure to a test piece 9; opening a horizontal actuator 8 to apply horizontal push-pull force to the L-shaped loading beam 2;
the fixed end of the vertical hydraulic jack 7 is fixed with the lower surface of the horizontal sliding block 6; the vertical hydraulic jack 7 is arranged on the L-shaped loading beam 2; the sliding protrusion 6-1 of the horizontal slider 6 is aligned with the sliding rail 4-1-1 of the top plate 4-1; opening a vertical hydraulic jack 7, and lifting a horizontal sliding block 6 by means of the counter force of the vertical hydraulic jack 7; when the sliding protrusion 6-1 is close to the sliding track 4-1-1, the lifting speed of the horizontal sliding block 6 is reduced, so that the sliding protrusion 6-1 can be clamped into the sliding track 4-1-1; closing the vertical hydraulic jack 7 when the upper surface of the horizontal sliding block 6 is in full contact with the lower surface of the vertical hydraulic jack 7;
3) Under the synergistic effect of the parallel four-bar mechanism 3, the test piece 9 only moves horizontally and does not bend; the horizontal actuator 8 continuously applies repeated reciprocating force to the test piece 9 until the test piece 9 completely loses the bearing capacity or the bearing capacity is reduced to 85% of the limit load, and the vertical hydraulic jack 7 and the horizontal actuator 8 are closed to complete the test.
As shown in FIG. 7, during the test, the L-shaped loading beam 2 generates vertical pressure f under the action of the vertical hydraulic jack 7 1 And f 2 The L-shaped loading beam 2 generates horizontal pushing/pulling force f under the action of the horizontal actuator 8 3 And clockwise/anticlockwise bending moment m 3 The method comprises the steps of carrying out a first treatment on the surface of the Clockwise/anticlockwise bending moment m 3 Will bend the test piece 9, and the parallel four-bar mechanism 3 is required to generate passive force to generate m 3 Balancing off; passive force F 4 、F 5 Can be decomposed into horizontal force f 4x 、f 5x And a vertical force f 4y 、f 5y Wherein f 4y And f 5y Can generate a bending moment m in a counterclockwise direction 4 And m 5 To balance m 3 The method comprises the steps of carrying out a first treatment on the surface of the The connecting rods AC3-7, BD3-8, CE3-9, DF3-10 and CD3-11 are all combined steel columns with large rigidity and variable variationThe shape quantity is small; the connecting beam CD3-11 is parallel to the long side of the L-shaped bottom beam 1 according to the parallelogram method; the connecting rods CE3-9 are parallel to the connecting rods DF3-10 and have the same length, and the long side of the L-shaped loading beam 2 is parallel to the connecting cross beam CD3-11 according to the parallelogram rule; the connecting cross beams CD3-11 are respectively parallel to the long side of the L-shaped bottom beam 1 and the long side of the L-shaped loading beam 2, so that the long side of the L-shaped bottom beam 1 is parallel to the long side of the L-shaped loading beam 2; under the action of the horizontal actuator, the L-shaped loading beam 2 only moves in the horizontal direction, namely the test piece 9 only moves in the horizontal direction and does not bend.
Claims (7)
1. The loading test device is characterized by comprising an L-shaped bottom beam, an L-shaped loading beam, a parallel four-bar mechanism, a portal frame, a pulley lifting mechanism, a horizontal sliding block, a vertical hydraulic jack and a horizontal actuator, wherein the long side of the L-shaped bottom beam is arranged on the ground, the L-shaped loading beam is arranged above the L-shaped bottom beam, and the L-shaped loading beam and the L-shaped bottom beam are connected together through the parallel four-bar mechanism; the portal frame consists of four upright posts and a top plate, wherein the four upright posts are arranged on the ground, two upright posts are respectively arranged in front of and behind the long side of the L-shaped bottom beam, and the top plate is arranged at the top ends of the four upright posts; the pulley lifting mechanism is arranged above the top plate, and the horizontal sliding block is arranged below the top plate; the fixed end of the vertical hydraulic jack is fixedly connected with the horizontal sliding block, and the free end of the vertical hydraulic jack is fixedly connected with the long side of the L-shaped loading beam; the fixed end of the horizontal actuator is fixedly connected with the short side of the L-shaped bottom beam, and the free end of the horizontal actuator is fixedly connected with the short side of the L-shaped loading beam.
2. The loading test device for the synergistic action of the double-L-shaped beam and the parallel four-bar linkage according to claim 1, wherein the parallel four-bar linkage comprises a connecting hinge a, a connecting hinge B, a connecting hinge C, a connecting hinge D, a connecting hinge E, a connecting hinge F, a connecting rod AC, a connecting rod BD, a connecting rod CE, a connecting rod DF and a connecting cross beam CD; the connecting hinge A is connected with the connecting rod AC and the L-shaped bottom beam, the connecting hinge B is connected with the connecting rod BD and the L-shaped bottom beam, the connecting hinge C is connected with the connecting rod AC and the connecting rod CE, the connecting hinge D is connected with the connecting rod BD and the connecting rod DF, the connecting hinge E is connected with the connecting rod CE and the L-shaped loading beam, the connecting hinge F is connected with the connecting rod DF and the L-shaped loading beam, and the two ends of the connecting beam CD are the connecting hinge C and the connecting hinge D.
3. The loading test device for the synergistic action of the double L-shaped beams and the parallel four connecting rods according to claim 2 is characterized in that the connecting rods AC, BD, CE and DF are all I-shaped steel, and the lengths and the section thicknesses of the connecting rods AC, BD, CE and DF are the same; the connecting beam CD is a combined section steel.
4. The loading test device for the synergistic action of the double L-shaped beams and the parallel four-bar linkage as claimed in claim 1, wherein the upright is an I-shaped steel, and a base is arranged below the upright.
5. The loading test device for the synergistic effect of the double-L-shaped beam and the parallel four-bar linkage according to claim 1, wherein the pulley lifting mechanism comprises a front tripod, a rear tripod, a lapping rod, a pulley block, a rotating spool, a steel strand I, a steel strand II, a steel strand III, a fixed pulley II, a fixed pulley III, a left hook and a right hook; two footings of the front tripod and the rear tripod are fixedly arranged on the top plate, two ends of the lap joint rod are fixedly connected with the top angles of the front tripod and the rear tripod respectively, and the front tripod, the rear tripod and the lap joint rod are combined into a pulley block hanging bracket; the pulley block consists of a fixed pulley I and a movable pulley, and the fixed pulley I is hung on the lap joint rod; the rotating spool is fixedly arranged on the top plate; one end of the steel strand I is fixedly connected with the fixed pulley I, the steel strand I is firstly wound on the movable pulley downwards, then wound on the fixed pulley I upwards, and finally wound on the rotary spool, and the other end of the steel strand I is fixedly connected with the rotary spool; the fixed pulley II is fixedly arranged at the left end of the top plate, the fixed pulley III is fixedly arranged at the right end of the top plate, the left hook is fixedly arranged at the left part of the long side of the L-shaped loading beam, and the right hook is fixedly arranged at the right part of the long side of the L-shaped loading beam; one ends of the steel strand II and the steel strand III are fixedly connected with the movable pulley, the other end of the steel strand II is connected with the left hook after passing through the fixed pulley II, and the other end of the steel strand III is connected with the right hook after passing through the fixed pulley III.
6. The loading test device for the synergistic action of the double-L-shaped beam and the parallel four-bar linkage according to claim 1, wherein the lower surface of the top plate is a smooth surface and is provided with a sliding guide rail, the upper surface of the horizontal sliding block is a smooth surface and is provided with a sliding protrusion, and the sliding protrusion and the sliding guide rail are matched and installed together.
7. The dual L-beam and parallel four bar linkage synergistic load test apparatus as claimed in claim 6, wherein the smooth surface material is polytetrafluoroethylene.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311352596.7A CN117405512A (en) | 2023-10-19 | 2023-10-19 | Loading test device for synergistic action of double L-shaped beams and parallel four-bar linkages |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311352596.7A CN117405512A (en) | 2023-10-19 | 2023-10-19 | Loading test device for synergistic action of double L-shaped beams and parallel four-bar linkages |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117405512A true CN117405512A (en) | 2024-01-16 |
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ID=89488389
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311352596.7A Pending CN117405512A (en) | 2023-10-19 | 2023-10-19 | Loading test device for synergistic action of double L-shaped beams and parallel four-bar linkages |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117405512A (en) |
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2023
- 2023-10-19 CN CN202311352596.7A patent/CN117405512A/en active Pending
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