CN110715858A - Automatic pull test device and method for lever block - Google Patents
Automatic pull test device and method for lever block Download PDFInfo
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- CN110715858A CN110715858A CN201810771506.0A CN201810771506A CN110715858A CN 110715858 A CN110715858 A CN 110715858A CN 201810771506 A CN201810771506 A CN 201810771506A CN 110715858 A CN110715858 A CN 110715858A
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- 238000012360 testing method Methods 0.000 title claims abstract description 47
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- 238000010998 test method Methods 0.000 claims abstract description 9
- 230000009471 action Effects 0.000 claims abstract description 4
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 4
- 238000009864 tensile test Methods 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 2
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- 238000010276 construction Methods 0.000 description 3
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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
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Abstract
The invention relates to an automatic pull test device of a lever block and a test method thereof.A ground anchor is arranged at both ends of the lever block to be tested, a shackle is connected on the ground anchor at each end, one end of a hydraulic cylinder is connected with the shackle on the ground anchor at one end, the other end of the hydraulic cylinder is connected with one end of the lever block to be tested, and the other end of the lever block to be tested is connected with the shackle on the ground anchor at the other end; the hydraulic cylinder is respectively connected with the hydraulic station and the electric appliance control system; the hydraulic station supplies hydraulic oil to the hydraulic cylinder to enable the hydraulic cylinder to complete stretching action, and the electric appliance control system adjusts the stretching degree of the hydraulic cylinder, so that loading or unloading of the lever block to be tested is achieved, and a tension test of the lever block is completed. The invention can realize the total loading and unloading time less than or equal to 10min, does not need manpower to load and unload, has convenient operation, is safe and reliable, saves labor force and labor intensity and greatly improves the production efficiency.
Description
Technical Field
The invention belongs to the field of power transmission and transformation line construction, and particularly relates to an automatic pull test device and a test method for a lever block.
Background
The lever block is an important construction machine for the engineering construction of the power transmission line, and the lever block is required to provide safe and reliable tension in application. According to the requirements, before each use, a tensile test (more than 8-15 tons of force) with the rated load of 1.25 times is carried out on each lever hoist so as to ensure the safe use. At present, each transmission and transformation engineering company generally has more than 2000 lever blocks, and a tension test is a difficult problem. The test mechanism of the outsourcing large-tonnage hydraulic tension tester has high cost and low efficiency, and is difficult to meet the use requirement of rapid turnover. Therefore, most of the existing power transmission and transformation companies use two fixtures which are about 5 meters apart, such as the root of a big tree or a heavy fixture, as a tensile foundation, and perform tensile tests in multiple groups, but the following disadvantages exist.
1. The single-group tension test has low working efficiency; the chain hoist needs to be manually moved to load and unload in the stress process, the chain hoist swings about 300 times averagely, and the process time is 30 minutes.
2. The labor intensity is high; one pulling force needs to be manually loaded to move the handle 300 for multiple times, the maximum swinging force is about 55kg, and the physical strength of operators is greatly consumed.
3. The potential safety hazard is large; the manual operation, one table is pulled by force for hundreds of times, so that the table is extremely easy to be injured and has poor safety.
4. If the root of the big tree is utilized, the environment is not protected; the root of the tree is used as a bearing and pulling foundation, generally about 10 tons, the tree is damaged due to large stress, the tree is easy to die, and the environment is not environment-friendly. The existing hydraulic tension test design is expensive and heavy.
Disclosure of Invention
Aiming at the problems of the conventional lever hoist tension test, the invention aims to provide an automatic lever hoist tension test device and a test method thereof.
The purpose of the invention is realized by the following technical scheme:
the automatic pull test device for the lever block comprises shackles, ground anchors, a hydraulic cylinder, a hydraulic station and an electric appliance control system, wherein the ground anchors are respectively arranged at two ends of the lever block to be tested, the ground anchor at each end is connected with the shackles, one end of the hydraulic cylinder is connected with the shackles on the ground anchor at one end, the other end of the hydraulic cylinder is connected with one end of the lever block to be tested, and the other end of the lever block to be tested is connected with the shackles on the ground anchors at the other end; the hydraulic cylinder is respectively connected with the hydraulic station and the electric appliance control system;
wherein: a tension meter is arranged between one end of the hydraulic cylinder and the shackle on the ground anchor at one end;
the ground anchors at the two ends are buried underground and used as the two ends of a tensile test, and at least the force is supported for 15 t; the shackle bears at least 17 t;
the invention discloses a test method of an automatic pull test device of a lever hoist, which comprises the following steps:
burying the ground anchor as two ends of a tension test into the ground, installing a shackle on the ground anchor at each end, sequentially connecting one end of the hydraulic cylinder and a tension meter to the shackle on the ground anchor at one end, connecting two ends of the hand-operated hoist to be tested with the shackle on the ground anchor at the other end of the hydraulic cylinder and the shackle on the ground anchor at the other end of the hydraulic cylinder respectively, and finally connecting the hydraulic cylinder with a hydraulic station and an electric appliance control system respectively; the hydraulic station provides hydraulic oil for the hydraulic cylinder to enable the hydraulic cylinder to complete stretching action, and the electric appliance control system adjusts the stretching degree of the hydraulic cylinder, so that loading or unloading of the lever block to be tested is achieved, and a tension test of the lever block is completed. The method comprises the following specific steps:
A. burying the ground anchor at a set position, and respectively inserting two shackles into connecting holes of the ground anchor at two ends, wherein the shackle at one end is connected with a tension meter, and the tension meter sets a test tension;
B. connecting the hydraulic cylinder to a hydraulic station and an electric appliance control system;
C. connecting the tension meter with one end of a hydraulic cylinder;
D. one end of a lever block to be subjected to a tension test is hung on the hydraulic cylinder, and the other end of the lever block is hung on a shackle which is connected with a ground anchor and is far away from the other end of the tension meter;
E. electrifying the electric appliance control system, and controlling the cylinder body of the hydraulic cylinder to retract through the electric appliance control system so as to realize loading; stopping retracting when the tension meter reaches a preset tension, and maintaining the pressure of the lever block according to a set time; after the pressure maintaining time is up, controlling the hydraulic cylinder to extend, unloading the lever block and completing a tension test;
wherein: after the step D is finished, the chain of the lever block is finished, the chain is prevented from being unsmooth in knotting, and the lever block is tightly taken to straighten the chain;
the total time of loading and unloading of the pull test of the lever hoist is less than or equal to 10 min.
The invention has the advantages and positive effects that:
the invention can realize loading and unloading, the total time is less than or equal to 10min, no manpower is needed for loading and unloading, only one person is needed to operate the device, the operation is convenient, safe and reliable, the labor force and the labor intensity are saved, and the production efficiency is greatly improved.
Drawings
FIG. 1 is a top view of the test apparatus of the present invention;
FIG. 2 is a front view of the structure of the test device of the present invention;
wherein: the device comprises a shackle 1, a ground anchor 2, a tension meter 3, a hydraulic cylinder 4, a hydraulic station 5, an electric appliance control system 6 and a lever block 7.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1 and 2, the testing device of the invention comprises a shackle 1, a ground anchor 2, a tension meter 3, a hydraulic cylinder 4, a hydraulic station 5 and an electric appliance control system 6, wherein the ground anchors 2 are respectively arranged at two ends of a lever block 7 to be tested, the ground anchors 2 at the two ends are respectively buried underground and used as two ends of a tension test, and at least a force bearing part 15t is arranged; the distance between the ground anchors 2 at the two ends of the embodiment is 20 meters. The ground anchor 2 at each end is connected with a shackle 1, and the shackle 1 is inserted into a connecting hole of the ground anchor 2 to bear at least 17 t. A tension meter 3, a hydraulic cylinder 4 and a lever block 7 are sequentially connected between shackles 1 of ground anchors 2 at two ends, namely the shackles 1 on the ground anchors 2 at one end are connected with the tension meter 3, one end of the hydraulic cylinder 4 is connected with the tension meter 3, the other end of the hydraulic cylinder 4 is connected with one end of the lever block 7 to be tested, and the other end of the lever block 7 to be tested is connected with the shackles 1 on the ground anchors 2 at the other end. The hydraulic cylinder 4 is connected with the hydraulic station 5 and the electrical appliance control system 6 respectively, and the electrical appliance control system 6 of the present invention is prior art and will not be described herein again.
According to the invention, the test device selects the shackle 1 which meets the tonnage of the lever hoist tension test, and the types of the shackle are 16t and 17 t; the embodiment is selected to be load bearing 17 t.
The test device of the invention selects the ground anchor 2, and utilizes the existing ground anchor with proper tonnage specification to be respectively embedded into two ends of a tensile test field to be used as a bearing and pulling foundation; the present embodiment uses a 15t model.
In the test device, for the test tension measurement, a tension meter 3 with a shockproof function and a set tension tonnage is selected; the present embodiment uses a 20t model tension meter, which can not only realize the predetermined function but also be low in cost compared with the tension with a sensor.
The test device selects the hydraulic cylinder 4, the hydraulic station 5 and the electric appliance control system 6, selects the hydraulic assembly which meets the tonnage of the lever hoist tension test, and each lever hoist 7 is required to carry out the tension test with the rated load of 1.25 times before being used every time according to the requirement, wherein the tonnage of the hydraulic assembly needs to exceed 15 t.
The tension of the hydraulic cylinder 4 in the testing device can be set through the hydraulic station 5 before the operation according to the tension of the lever hoist, so that the use safety is improved.
The invention discloses a test method of an automatic pull test device of a lever hoist, which comprises the following steps:
burying the ground anchor 2 serving as two ends of a tension test into the ground, installing a shackle 1 on the ground anchor 2 at each end, sequentially connecting one end of a hydraulic cylinder 4 and a tension meter 3 to the shackle 1 on the ground anchor 2 at one end, connecting two ends of a lever block 7 to be tested with the other end of the hydraulic cylinder 4 and the shackle 1 on the ground anchor 2 at the other end respectively, and finally connecting the hydraulic cylinder 4 with a hydraulic station 5 and an electric appliance control system 6 respectively; the hydraulic station 5 is used for providing hydraulic oil for the hydraulic cylinder 4, so that the hydraulic cylinder 4 can complete the telescopic action, and the electric appliance control system 6 is used for adjusting the telescopic degree of the hydraulic cylinder 4, thereby realizing the loading or unloading of the lever block 7 to be tested and completing the tensile test of the lever block 7. The method comprises the following specific steps:
A. burying the ground anchor 2 at a set position, and respectively inserting the two shackles 1 into connecting holes of the ground anchors 2 at two ends, wherein the shackle 1 at one end is connected with a tension meter 3, and the tension meter 3 sets a test tension;
B. connecting the hydraulic cylinder 4 to a hydraulic station 5 and an electric appliance control system 6;
C. connecting a tension meter 3 with one end of a hydraulic cylinder 4;
D. one end of a lever hoist 7 to be subjected to a tension test is hung on the hydraulic cylinder 4, and the other end is hung on a shackle 1 connected with a ground anchor 2 at the other end far away from a tension meter 3; arranging the chain of the lever hoist 7 to avoid unsmooth knotting of the chain, and tightly tying the lever hoist 7 to straighten the chain;
E. electrifying the electric appliance control system 6, and controlling the cylinder body of the hydraulic cylinder 4 to retract through the electric appliance control system 6 so as to realize loading; when the tension meter 3 reaches the preset tension, retracting is stopped, and the pressure of the lever block 7 is maintained according to the set time; and after the pressure maintaining time is up, controlling the hydraulic cylinder 4 to extend, unloading the lever block 7 and completing the tension test.
The total time of loading and unloading of the pull test of the lever hoist 7 is less than or equal to 10 min.
Claims (8)
1. An automatic tensile test device of lever block which characterized in that: the device comprises shackles (1), ground anchors (2), hydraulic cylinders (4), a hydraulic station (5) and an electrical appliance control system (6), wherein the ground anchors (2) are respectively installed at two ends of a lever block (7) to be tested, the shackles (1) are respectively connected to the ground anchors (2) at each end, one end of each hydraulic cylinder (4) is connected with the shackles (1) on the ground anchor (2) at one end, the other end of each hydraulic cylinder is connected with one end of the lever block (7) to be tested, and the other end of the lever block (7) to be tested is connected with the shackles (1) on the ground anchor (2) at the other end; and the hydraulic cylinder (4) is respectively connected with the hydraulic station (5) and the electric appliance control system (6).
2. The lever block automatic tension test device of claim 1, wherein: and a tension meter (3) is arranged between one end of the hydraulic cylinder (4) and the shackle (1) on the ground anchor (2) positioned at one end.
3. The lever block automatic tension test device of claim 1, wherein: the ground anchors (2) at the two ends are buried underground and used as the two ends of a tensile test, and the force is at least supported by 15 t.
4. The lever block automatic tension test device of claim 1, wherein: the shackle (1) bears at least 17t of weight.
5. A test method of the lever hoist automatic tension test device of any one of claims 1 to 4, characterized in that: burying the ground anchor (2) into the ground as two ends of a tensile test, installing a shackle (1) on the ground anchor (2) at each end, sequentially connecting one end of the hydraulic cylinder (4) and the tension meter (3) to the shackle (1) on the ground anchor (2) at one end, connecting two ends of a lever block (7) to be tested with the other end of the hydraulic cylinder (4) and the shackle (1) on the ground anchor (2) at the other end respectively, and finally connecting the hydraulic cylinder (4) with the hydraulic station (5) and the electric appliance control system (6) respectively; the hydraulic station (5) is used for providing hydraulic oil for the hydraulic cylinder (4), so that the hydraulic cylinder (4) completes the telescopic action, and the electric appliance control system (6) is used for adjusting the telescopic degree of the hydraulic cylinder (4), so that the lever block (7) to be tested is loaded or unloaded, and the tension test of the lever block (7) is completed.
6. The test method according to claim 5, characterized in that: the method comprises the following specific steps:
A. burying the ground anchor (2) at a set position, respectively inserting two shackles (1) into connecting holes of the ground anchors (2) at two ends, wherein the shackle (1) at one end is connected with a tension meter (3), and the tension meter (3) is set for testing tension;
B. connecting the hydraulic cylinder (4) to a hydraulic station (5) and an electric appliance control system (6);
C. connecting the tension meter (3) with one end of a hydraulic cylinder (4);
D. one end of a lever hoist (7) to be subjected to a tension test is hung on the hydraulic cylinder (4), and the other end of the lever hoist is hung on a shackle (1) connected with a ground anchor (2) at the other end far away from a tension meter (3);
E. electrifying the electric appliance control system (6), and controlling the cylinder body of the hydraulic cylinder (4) to retract through the electric appliance control system (6) so as to realize loading; when the tension meter (3) reaches a preset tension, retracting is stopped, and the pressure of the lever block (7) is maintained according to a set time; and after the pressure maintaining time is up, controlling the hydraulic cylinder (4) to extend, unloading the lever block (7) and finishing the tension test.
7. The test method according to claim 6, characterized in that: and D, finishing the chain of the lever hoist (7) to avoid unsmooth knotting of the chain, and tightening the lever hoist (7) to straighten the chain.
8. The test method according to claim 6, characterized in that: the total time of loading and unloading of the pull test of the lever hoist (7) is less than or equal to 10 min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810771506.0A CN110715858A (en) | 2018-07-13 | 2018-07-13 | Automatic pull test device and method for lever block |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810771506.0A CN110715858A (en) | 2018-07-13 | 2018-07-13 | Automatic pull test device and method for lever block |
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| CN110715858A true CN110715858A (en) | 2020-01-21 |
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| CN201810771506.0A Pending CN110715858A (en) | 2018-07-13 | 2018-07-13 | Automatic pull test device and method for lever block |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111595570A (en) * | 2020-05-29 | 2020-08-28 | 国网福建省电力有限公司 | Full-automatic lever block static load test device |
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2018
- 2018-07-13 CN CN201810771506.0A patent/CN110715858A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111595570A (en) * | 2020-05-29 | 2020-08-28 | 国网福建省电力有限公司 | Full-automatic lever block static load test device |
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