CN113390724A - Testing device of tripod for photovoltaic support - Google Patents

Testing device of tripod for photovoltaic support Download PDF

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Publication number
CN113390724A
CN113390724A CN202110639172.3A CN202110639172A CN113390724A CN 113390724 A CN113390724 A CN 113390724A CN 202110639172 A CN202110639172 A CN 202110639172A CN 113390724 A CN113390724 A CN 113390724A
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China
Prior art keywords
tripod
stress
upright
personal computer
displacement
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Granted
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CN202110639172.3A
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Chinese (zh)
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CN113390724B (en
Inventor
张小杰
李二斌
韦海峰
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Sungrow Renewables Development Co Ltd
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Sungrow Renewables Development Co Ltd
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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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0001—Type of application of the stress
    • G01N2203/0003—Steady
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0014—Type of force applied
    • G01N2203/0016—Tensile or compressive
    • G01N2203/0019—Compressive
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/003—Generation of the force
    • G01N2203/0042—Pneumatic or hydraulic means
    • G01N2203/0044—Pneumatic means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0058—Kind of property studied
    • G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
    • G01N2203/0075—Strain-stress relations or elastic constants
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/02—Details not specific for a particular testing method
    • G01N2203/06—Indicating or recording means; Sensing means
    • G01N2203/067—Parameter measured for estimating the property
    • G01N2203/0676—Force, weight, load, energy, speed or acceleration
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/02—Details not specific for a particular testing method
    • G01N2203/06—Indicating or recording means; Sensing means
    • G01N2203/067—Parameter measured for estimating the property
    • G01N2203/0682—Spatial dimension, e.g. length, area, angle
    • 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
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy

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  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)

Abstract

The invention discloses a testing device of a tripod for a photovoltaic bracket, which comprises: the base is used for installing the tripod, the bearing beam is arranged on the base, the wind load applying device is arranged on the bearing beam and used for applying wind load to the tripod, and the snow load applying device is arranged on the base and used for applying snow load to the tripod. According to the testing device of the tripod for the photovoltaic bracket, the tripod can be directly installed for testing, the whole testing device of the tripod for the photovoltaic bracket can be repeatedly used, the testing efficiency is improved, and the testing cost is also reduced; meanwhile, the probability of damaging the photovoltaic module is reduced, and the test cost is also reduced; moreover, the test under the wind and snow combined working condition can be carried out.

Description

Testing device of tripod for photovoltaic support
Technical Field
The invention relates to the technical field of photovoltaic power generation, in particular to a testing device of a tripod for a photovoltaic support.
Background
In a photovoltaic power plant, a photovoltaic support is generally used to support a photovoltaic module. In order to ensure reliability, the photovoltaic support needs to be tested to ensure that the performance of the photovoltaic support meets requirements.
At present, a photovoltaic support is mainly tested in a module building mode, specifically, as shown in fig. 1, a tripod 01 and a purlin 02 are used for building the photovoltaic support, a photovoltaic module 03 is installed on the photovoltaic support, and then a sandbag 04 is stacked on the photovoltaic module 03 to simulate wind pressure and snow load so as to perform wind pressure testing and snow load testing; and carrying out wind suction test on the single stress node by adopting a tensile testing machine.
In the testing method, the built module is only suitable for one photovoltaic support and cannot be recycled, so that the testing efficiency is low and the testing cost is high.
In addition, the test is a destructive test, that is, the sandbags 04 stacked on the photovoltaic modules 03 are more prone to damage the photovoltaic modules 03, which also results in higher test cost.
In addition, in the test method, the tensile test of a single stress node cannot completely represent the wind suction test of the whole photovoltaic bracket; the test method can not test under the wind and snow combined working condition; in the test method, test data cannot be stored and analyzed, and whether the photovoltaic support is qualified or not can be analyzed only through experience.
In summary, how to test the tripod for the photovoltaic support to improve the testing efficiency and reduce the testing cost is a problem to be solved by those skilled in the art.
Disclosure of Invention
The invention aims to provide a testing device of a tripod for a photovoltaic bracket, which aims to improve the testing efficiency and reduce the testing cost.
In order to achieve the above purpose, the invention provides the following technical scheme:
a testing device of a tripod for a photovoltaic bracket comprises: the base for installing the tripod, set up in the carrier bar of base, set up in the carrier bar just is used for right the tripod applys the wind-load of wind-load and applys the device, and set up in the base just is used for right the tripod applys the snow-load of snow-load and applys the device.
Optionally, the load beam is configured to be disposed parallel to a force bearing surface of the tripod.
Optionally, the carrier bar is a straight bar, and an included angle between the carrier bar and the horizontal direction is adjustable.
Optionally, the base is provided with a support frame, two ends of the carrier beam are fixed on the support frame, and the heights of the two ends of the carrier beam are adjustable.
Optionally, the support frame comprises: the first upright post and the second upright post are both fixed on the base, the first movable cross beam is detachably fixed on the first upright post, and the second movable cross beam is detachably fixed on the second upright post; one end of the bearing beam is fixed to the first movable cross beam, the other end of the bearing beam is fixed to the second movable cross beam, the position of the first movable cross beam in the height direction of the first upright post is adjustable, and the position of the second movable cross beam in the height direction of the second upright post is adjustable.
Optionally, the support frame further comprises: the first reinforcing cross beam is fixedly connected with the top of the first upright column, the second reinforcing cross beam is fixedly connected with the top of the second upright column, the first lifting sling is arranged on the first reinforcing cross beam, and the second lifting sling is arranged on the second reinforcing cross beam; wherein the first movable beam is moved to a desired position by the first lifting sling and the second movable beam is moved to a desired position by the second lifting sling.
Optionally, the number of the first upright column and the second upright column is at least two;
the support frame still includes: the first reinforcing beam is fixedly connected with the top of the first upright, and/or the second reinforcing beam is fixedly connected with the top of the second upright, and/or the first reinforcing beam is fixedly connected with the first upright and the second upright, and/or the second reinforcing beam is fixedly connected with the first upright and the second upright;
wherein the first reinforcing beam is positioned at the top of the first upright and the second upright, the top of one of the first upright and the second upright is fixedly connected with one end of the second reinforcing beam, and the bottom of the other upright is fixedly connected with the other end of the second reinforcing beam.
Optionally, the tripod is a tripod for a dual-slope assembly, and the carrier beam is deformable so that the carrier beam is arranged in parallel with a stress surface of the tripod for the dual-slope assembly.
Optionally, the base is provided with a support frame, two ends of the carrier beam are both fixed on the support frame, and the heights of the two ends of the carrier beam are both adjustable;
the bearing beam comprises at least two straight beam sections, any two straight beam sections are sequentially distributed along the length direction of the bearing beam, and the adjacent two straight beam sections are hinged.
Optionally, the tripod is a tripod for a dual-slope assembly, and the carrier beam is used for being arranged in parallel with a stress surface of the tripod for the dual-slope assembly.
Optionally, the load beam is V-shaped or inverted V-shaped.
Optionally, the wind load applying device can apply wind pressure load and wind suction load to the tripod; the wind load applying device is arranged on the top side of the tripod, and the snow load applying device is arranged on the bottom side of the tripod.
Optionally, the wind load applying apparatus comprises: the driver can act on the stress nodes of the tripod, and the driver corresponds to the stress nodes one to one.
Optionally, the driver is an air cylinder, and the wind load applying device further includes a first control module for controlling air pressure of each air cylinder;
or the driver is a hydraulic cylinder, and the wind load applying device further comprises a second control module for controlling the hydraulic pressure of each hydraulic cylinder;
or, the driver includes motor and push rod, the push rod can act on the atress node, motor drive the push rod reciprocating motion.
Optionally, the snow load applying apparatus includes: the snow load driving component is used for driving the connecting component to move back and forth; the connecting component and the snow load driving component are in one-to-one correspondence with stress nodes of the tripod.
Optionally, the connecting part is a connecting rope, the base is provided with a pulley, the connecting rope is wound on the pulley to turn to 90 degrees, and the snow-load driving part drives in the horizontal plane.
Optionally, the testing apparatus for a tripod for a photovoltaic support further includes:
the wind load pressure sensor is arranged on the wind load applying device and used for detecting acting force applied to the tripod by the wind load applying device;
and the snow load pressure sensor is arranged on the snow load applying device and used for detecting acting force applied to the tripod by the snow load applying device.
Optionally, the testing apparatus for a tripod for a photovoltaic support further includes: the displacement sensor, the stress sensor and the industrial personal computer;
the displacement sensors and the stress sensors are arranged at stress nodes of the tripod and correspond to the stress nodes one to one;
the displacement sensor is used for detecting the displacement of the tripod at the stress node, and the stress sensor is used for detecting the stress of the tripod at the stress node;
the displacement sensor and the stress sensor are both in communication connection with the industrial personal computer, the industrial personal computer is used for comparing the displacement of the stress node with the set deflection of the tripod, and if the displacement of each stress node is smaller than the set deflection, the industrial personal computer is used for judging that the deflection of the tripod is qualified; if the displacement of at least one stress node is not less than the set deflection, the industrial personal computer is used for judging that the deflection of the tripod is unqualified; the industrial personal computer is used for comparing the stress at the stress nodes with the set yield strength of the tripod, and if the stress at each stress node is smaller than the set yield strength, the industrial personal computer is used for judging that the yield strength of the tripod is qualified; and if the stress at least one stress node is not less than the set yield strength, the industrial personal computer is used for judging that the yield strength of the tripod is unqualified.
Optionally, the industrial personal computer is further configured to store detection values of the displacement sensor and the stress sensor.
Optionally, if the deflection of the tripod is qualified, the industrial personal computer is further configured to obtain the maximum displacement in all the stressed nodes, and if the difference value between the set deflection and the maximum displacement is within a set displacement range, the industrial personal computer is configured to determine that the deflection of the tripod is not over-designed; if the difference value between the set deflection and the maximum displacement is not within the set displacement range, the method is used for judging that the deflection of the tripod is over-designed;
if the deflection of the tripod is unqualified, the industrial personal computer is also used for judging that the stressed node with the displacement not less than the set deflection is a weak position of the tripod;
if the yield strength of the tripod is qualified, the industrial personal computer is further used for obtaining the maximum stress in all the stress nodes, and if the difference value between the set yield strength and the maximum stress is within a set stress range, the industrial personal computer is used for judging that the yield strength of the tripod is not over-designed; if the difference value between the set deflection and the maximum stress is not within the set stress range, judging that the yield strength of the tripod is over-designed;
and if the yield strength of the tripod is unqualified, the industrial personal computer is also used for judging that the stress node with the stress not less than the set yield strength is a weak position of the tripod.
The invention provides a testing device of a tripod for a photovoltaic support, which is characterized in that the testing device is provided with a base, a bearing beam is arranged on the base, a wind load applying device is arranged on the bearing beam, and a snow load applying device is arranged on the base, wherein the base is used for mounting the tripod, the wind load applying device is used for applying wind load to the tripod, and the snow load applying device is used for applying snow load to the tripod. When the tripod needs to be tested, the tripod is fixed on the base, and the test can be completed by applying loads by using the wind load applying device and the snow load applying device. Therefore, the testing device of the tripod for the photovoltaic support provided by the invention can be used for testing the tripod by directly mounting the tripod, and the whole testing device of the tripod for the photovoltaic support can be repeatedly used, so that the testing efficiency is improved, and the testing cost is also reduced.
Meanwhile, the testing device of the tripod for the photovoltaic bracket, provided by the invention, has the advantages that the wind load applying device is used for applying wind load to the tripod, and the snow load applying device is used for applying snow load to the tripod, so that the probability of damaging a photovoltaic assembly is reduced, and the testing cost is also reduced; moreover, the test under the wind and snow combined working condition can be carried out.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic diagram of a tripod for a photovoltaic support provided in the prior art;
fig. 2 is a schematic structural diagram of a testing apparatus for a tripod of a photovoltaic support according to an embodiment of the present invention;
fig. 3 is another schematic structural diagram of a testing device of a tripod for a photovoltaic support according to an embodiment of the present invention;
fig. 4 is another schematic structural diagram of a testing device of a tripod for a photovoltaic support, provided by an embodiment of the present invention;
fig. 5 is a partially enlarged view of a testing device of a tripod for a photovoltaic support according to an embodiment of the present invention;
fig. 6 is a partially enlarged view of a testing device of a tripod for a photovoltaic support according to an embodiment of the present invention;
fig. 7 is a partially enlarged view of a testing device of a tripod for a photovoltaic bracket according to an embodiment of the present invention;
fig. 8 is a flowchart of a work controller in the testing apparatus for a tripod of a photovoltaic support according to the embodiment of the present invention;
fig. 9 is another work flow chart of the industrial control machine in the testing device of the tripod for the photovoltaic bracket according to the embodiment of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 to 4, a testing apparatus for a tripod of a photovoltaic support provided by an embodiment of the present invention includes: the base 1 is used for installing the tripod 4, the bearing beam 7 is arranged on the base 1, the wind load applying device is arranged on the bearing beam 7 and used for applying wind load to the tripod 4, and the snow load applying device is arranged on the base 1 and used for applying snow load to the tripod 4.
It should be noted that the acting force exerted on the tripod 4 by the wind load exerting device is perpendicular to the stress surface of the tripod 4; the acting force applied to the tripod 4 by the snow load applying apparatus acts on the force-bearing surface of the tripod 4 in the vertical direction. The wind load applying device is used for applying wind load to each stress node of the tripod 4, and the snow load applying device is used for applying snow load to each stress node of the tripod 4. Specifically, the position of the tripod 4 for fixing the purlin is a stressed node.
According to the testing device of the tripod for the photovoltaic bracket, provided by the embodiment of the invention, the base 1 is arranged, the bearing beam 7 is arranged on the base 1, the wind load applying device is arranged on the bearing beam 7, and the snow load applying device is arranged on the base 1, wherein the base 1 is used for mounting the tripod 4, the wind load applying device is used for applying wind load to the tripod 4, and the snow load applying device is used for applying snow load to the tripod 4. When the tripod 4 needs to be tested, the tripod 4 is fixed on the base 1, and the test can be completed by applying loads by using a wind load applying device and a snow load applying device. Therefore, the testing device of the tripod for the photovoltaic bracket provided by the invention can be used for testing the tripod 4 by directly mounting the tripod 4, and the whole testing device of the tripod for the photovoltaic bracket can be repeatedly used, so that the testing efficiency is improved, and the testing cost is also reduced.
Meanwhile, according to the testing device of the tripod for the photovoltaic bracket, which is provided by the embodiment of the invention, the wind load applying device is used for applying wind load to the tripod 4, and the snow load applying device is used for applying snow load to the tripod 4, so that the probability of damaging a photovoltaic assembly is reduced, and the testing cost is also reduced; moreover, the test under the wind and snow combined working condition can be carried out.
In order to facilitate the mounting and dismounting of the tripod 4, the base 1 is used for detachably mounting the tripod 4.
In the testing device of the tripod for the photovoltaic bracket, the acting force applied to the tripod 4 by the wind load applying device is perpendicular to the stress surface of the tripod 4, and in order to ensure the force application direction, the bearing beam 7 can be selected to be arranged in parallel with the stress surface of the tripod 4.
In practical application, the bearing surfaces of the load beam 7 and the tripod 4 may be slightly inclined, and are not limited to the above embodiment.
The tripod 4 may be a tripod for a single-slope assembly, as shown in fig. 2-3. In this case, the load beam 7 may be selected to be a straight beam. In order to be suitable for various tripods 4, especially for tripods 4 with different inclination angles, the included angle between the bearing beam 7 and the horizontal direction can be selected to be adjustable. Like this, adjust the contained angle of carrier bar 7 and horizontal direction according to the inclination of tripod 4 to guarantee carrier bar 7 be used for with tripod 4's stress surface parallel arrangement, thereby make whole testing arrangement can be applicable to different inclination's tripod 4.
The inclination angle of the tripod 4 is an angle between a force-bearing surface of the tripod 4 and a horizontal direction.
Specifically, if the tripod 4 is a tripod for a four-row assembly, as shown in fig. 3, the fixing position of the tripod 4 on the base 1 is located at the outer sides of the first upright post 5 and the second upright post 14, and the test of the tripod for a four-row support of 0 to 30 ° can be satisfied by adjusting the included angle between the load beam 7 and the horizontal direction.
In order to prolong the service life and reduce the protection requirement, the testing device of the tripod for the photovoltaic bracket is used indoors. It should be noted that, the height of a general factory building is about 10 meters, which is influenced by the height of the factory building, and the height of the first upright 5 and/or the second upright 14 is about 10 meters, so as to show in fig. 3, when the four rows of components are tested by using the tripod, the inclination angle of the tripod 4 ranges from 0 to 30 degrees; as shown in fig. 2, the inclination angle of the tripod 4 ranges from 0 to 60 ° when the three-row assembly is tested with the tripod.
In the practical application process, in order to expand the measurement range, the testing device of the tripod for the photovoltaic support can be selected to be used outdoors, and at the moment, the heights of the first stand column 5 and the second stand column 14 are not affected by the height of a factory building any more.
The included angle between the bearing beam 7 and the horizontal direction can be adjusted, and various modes exist, such as hinging of one end of the bearing beam 7 and adjustment of the height of the other end of the bearing beam 7; alternatively, the height of both ends of the carrier bar 7 can be adjusted. The latter may be selected for simplicity of construction. Specifically, the base 1 is provided with a support frame, two ends of the carrier beam 7 are fixed on the support frame, and the heights of the two ends of the carrier beam 7 are adjustable.
In order to facilitate height adjustment, the support frame comprises: a first upright 5 and a second upright 14 both fixed to the base 1, a first movable cross member 10 detachably fixed to the first upright 5, and a second movable cross member 15 detachably fixed to the second upright 14; wherein, one end of the carrier beam 7 is fixed on the first movable beam 10, the other end of the carrier beam 7 is fixed on the second movable beam 15, the position of the first movable beam 10 in the height direction of the first upright post 5 is adjustable, and the position of the second movable beam 15 in the height direction of the second upright post 14 is adjustable.
Specifically, the first column 5 is provided with at least two first fixing positions for fixing the first movable beam 10, and any two first fixing positions are sequentially distributed along the vertical direction; the second movable beam 15 is detachably fixed to the second column 14, the second column 14 is provided with at least two second fixing positions for fixing the second movable beam 15, and any two second fixing positions are sequentially distributed along the vertical direction. For example, the first movable cross member 10 is detachably fixed to the first column 5 by a screw connector, and the first fixing position is a fixing hole; the second movable cross member 15 is detachably fixed to the second column 14 by a screw connector, and the second fixing position is a fixing hole.
It is understood that the vertical direction is the height direction of the first upright 5 and also the height direction of the second upright 14.
In the practical application process, two ends of the carrier bar 7 can be directly and detachably fixed on the first upright post 5 and the second upright post 14, the first upright post 5 is provided with at least two fixing positions for fixing the carrier bar 7, and the fixing positions are distributed along the height direction of the first upright post 5 in sequence; the second upright posts 14 are provided with at least two fixing positions for fixing the carrier bar 7, and the fixing positions are distributed in sequence along the height direction of the second upright posts 14. At this time, the first movable beam 10 and the second movable beam 15 need not be provided.
In order to facilitate the adjustment of the height of the first movable beam 10 and the second movable beam 15, as shown in fig. 2 to 4 and 6, the support frame further comprises: a first reinforcing beam 9 fixedly connected with the top of the first upright post 5, a second reinforcing beam 12 fixedly connected with the top of the second upright post 14, a first lifting sling 8 arranged on the first reinforcing beam 9, and a second lifting sling 13 arranged on the second reinforcing beam 12; wherein the first movable beam 10 is moved to a desired position by the first lifting sling 8 and the second movable beam 15 is moved to a desired position by the second lifting sling 13.
It should be noted that, when the first movable beam 10 is moved to the desired position by the first lifting sling 8, the first movable beam 10 and the first upright 5 are fixedly connected, so that the first movable beam 10 is kept at the desired position; when the second movable beam 15 is moved to a desired position by the second lifting sling 13, the second movable beam 15 and the second upright 14 are fixedly connected so that the second movable beam 15 is maintained at the desired position.
The specific types of the first lifting sling 8 and the second lifting sling 13 are selected according to actual needs, for example, the first lifting sling 8 and the second lifting sling 13 are both a chain block or an electric block, which is not limited in this embodiment.
In order to improve the stability of the support frame, the number of the first upright post 5 and the second upright post 14 is at least two. It is understood that any two first uprights 5 are distributed in sequence along the length direction of the first movable beam 10 and any two second uprights 14 are distributed in sequence along the length direction of the second movable beam 15.
For the sake of simplifying the structure, it is preferable that the first upright 5 and the second upright 14 are both two, in this case, the two first uprights 5 are respectively located at both ends of the first movable beam 10, and the two second uprights 14 are respectively located at both ends of the second movable beam 15.
In order to further improve the stability, the support frame further comprises: a first reinforcing beam 9 fixedly connected with the top of the first upright 5, and/or a second reinforcing beam 12 fixedly connected with the top of the second upright 14, and/or a first reinforcing beam 11 fixedly connected with the first upright 5 and the second upright 14, and/or a second reinforcing beam 2 fixedly connected with the first upright 5 and the second upright 14.
The first reinforcing beam 11 is positioned at the top of the first upright 5 and the second upright 14, the top of one of the first upright 5 and the second upright 14 is fixedly connected with one end of the second reinforcing beam 2, and the bottom of the other is fixedly connected with the other end of the second reinforcing beam 2.
Note that the first reinforcing beam 9 and the first movable beam 10 are disposed in parallel, and the second reinforcing beam 12 and the second movable beam 15 are disposed in parallel. The number of the first upright 5, the second upright 14, the first reinforcing beam 11 and the second reinforcing beam 2 is the same. The first reinforcing beam 11 is connected to the first column 5 and the second column 14 located on the same side, and the second reinforcing beam 2 is connected to the first column 5 and the second column 14 located on the same side.
The first column 5 and the second column 14 may be arranged at equal heights or at different heights. In order to reduce material costs, the heights of the first upright 5 and the second upright 14 may be selected to be different, and specifically, the first upright 5 is higher than the second upright 14, or the first upright 5 is lower than the second upright 14.
In practical application, other structures may be optionally provided to enhance the stability of the entire support frame, and are not limited to the above embodiments.
The tripod 4 may be a tripod for a dual-slope assembly, as shown in fig. 4. In order to improve the versatility, the load beam 7 can be deformed so that the load beam 7 is arranged in parallel with the bearing surface of the tripod for the double-slope assembly. It will be appreciated that the base 1 can now be used to mount a tripod for a double-ramp assembly.
Specifically, the base 1 includes a base body, and a first mounting portion 101 and a second mounting portion 102 both fixed to the base body, where the first mounting portion 101 is used to detachably fix a tripod for a dual-slope component, and the second mounting portion 102 is used to detachably fix a tripod for a single-slope component.
It is understood that there are one first mounting portion 101 and two second mounting portions 102. Of course, the number of the first mounting portions 101 and the second mounting portions 102 may be adjusted according to actual needs, and may be selected according to actual needs.
Above-mentioned testing arrangement of tripod for photovoltaic support can test the tripod for the single slope subassembly, also can test the tripod for the dual slope subassembly, has improved the commonality.
Specifically, the first mounting portion 101 is a first mounting column, the cross section of the first mounting column is circular, and the first mounting column is fixedly connected with the double-slope component through a tripod via a hoop 103; wherein, staple bolt 103 is fixed on first erection column, and one side of staple bolt 103 and one side of tripod for the dual-slope subassembly are fixed mutually through fastener detachably, and the opposite side of staple bolt 103 and the opposite side of tripod for the dual-slope subassembly are fixed mutually through fastener detachably.
The second mounting portion 102 is a second mounting column, a cross section of the second mounting column is square, the second mounting column is sleeved with a supporting column of a tripod for a single-slope component, and the second mounting column is detachably and fixedly connected with the supporting column of the tripod for the single-slope component through a fastener.
In practical applications, the first mounting portion 101 and the second mounting portion 102 may also have other structures, and are not limited to the above embodiments.
In order to facilitate the deformation of the bearing beam 7, the base 1 is provided with a support frame, two ends of the bearing beam 7 are fixed on the support frame, and the heights of the two ends of the bearing beam 7 are adjustable; the carrier bar 7 comprises at least two straight beam sections, any two straight beam sections are sequentially distributed along the length direction of the carrier bar 7, and the two adjacent straight beam sections 7 are hinged. In this way, the load beam 7 can be deformed by adjusting the heights of both ends of the load beam 7, for example, the load beam 7 is deformed into a V-shape or an inverted V-shape.
The hinge structure of two adjacent straight beam sections 7 is selected according to actual needs, and this embodiment does not limit this.
For the sake of simplifying the structure, two straight beam sections may be selected, which are a first straight beam section 702 and a second straight beam section 703, respectively, and the first straight beam section 702 and the second straight beam section 703 are hinged by a hinge 701. As shown in fig. 4, the tripod 4 is a tripod for a dual-slope assembly, and the original linear load beam 7 can be changed into a V-shape or an inverted V-shape by adjusting the height of the end of the first straight beam section 702 away from the second straight beam section 703, the height of the end of the second straight beam section 703 away from the straight beam section 702 and the hinge 701, that is, by adjusting the heights of the first movable cross beam 10 and the second movable cross beam 15 and the hinge 701, the load beam 7 is adjusted to the same angle as the tripod 4, and the test of the tripod for the dual-slope assembly can be satisfied.
In the practical application process, the tripod 4 can also be selected as a tripod for a double-slope component, and the bearing beam 7 is only used for being arranged in parallel with the stress surface of the tripod for the double-slope component. At this moment, the testing device of the tripod for the photovoltaic support can only test the tripod for the double-slope component.
The shape of the load beam 7 is selected according to actual needs, for example, the load beam 7 is V-shaped or inverted V-shaped, and this embodiment is not limited thereto.
In order to increase the test items, the above-described wind load applying apparatus can apply wind load and wind suction load to the tripod 4.
Because the wind load applying device is used for applying wind load to each stress node of the tripod 4, the testing device of the tripod for the photovoltaic support can apply wind suction load to all the stress nodes, can test the wind suction load of the whole tripod 4, and improves the reliability of a test result.
Of course, the wind load applying device may be selected to apply only a wind load to the tripod 4 or to apply only a wind absorption load to the tripod, and is not limited to the above limitation.
In order to facilitate the application of load, the above-described wind load applying means is provided on the top side of the tripod 4 and the snow load applying means is provided on the bottom side of the tripod 4. Of course, the positions of the wind load applying device and the snow load applying device may be selectively changed, and are not limited to the above-described embodiment.
The specific type of the wind load applying device is selected according to actual needs. Specifically, as shown in fig. 2 to 5, the wind load applying apparatus includes: and the drivers 6 can act on the stress nodes of the tripod 4, and the drivers 6 correspond to the stress nodes one by one.
When the wind load applying device needs to apply wind suction load, the driver 6 can be fixedly connected with the stress node of the tripod 4. For the convenience of disassembly and assembly, the driver 6 can be detachably and fixedly connected with the stress node of the tripod 4.
The driver 6 may be a cylinder, and it will be understood that a piston rod of the cylinder can act on a stress node of the tripod 4, and the piston rod can reciprocate. The wind load applying device further comprises a first control module for controlling the air pressure of each air cylinder. Therefore, the load applied by each cylinder can be controlled through the first control module, the load applied by each cylinder is convenient to ensure to be the same, and the reliability of the test result is improved.
The driver 6 can also be a hydraulic cylinder, and at the moment, a piston rod of the hydraulic cylinder can act on a stress node of the tripod 4 and can reciprocate. The wind load applying device further comprises a second control module for controlling the hydraulic pressure of each hydraulic cylinder. Therefore, the load applied by each hydraulic cylinder can be controlled through the second control module, the same load applied by each hydraulic cylinder is convenient to ensure, and the reliability of the test result is improved.
The driver 6 may also comprise a motor and a push rod, the push rod being capable of acting on the force-bearing node, the motor driving the push rod to reciprocate. At this time, the load applied by each motor may be controlled by the controller, thereby ensuring that the load applied by each motor is the same.
In practical applications, the wind load applying device may be of other structures, for example, the wind load applying device includes: an action shaft which can act on a stress node of the tripod 4 and drives the action shaft to move in a reciprocating manner; wherein, the action axes correspond to the stress nodes one by one.
The specific type of the snow load applying apparatus described above is designed according to actual needs. Specifically, as shown in fig. 2 and 7, the snow load applying apparatus described above includes: a connecting component 3 fixedly connected with a stress node of the tripod 4, a snow-loaded driving component 16 for driving the connecting component 3 to reciprocate; wherein, the connecting component 3 and the snow load driving component 16 are in one-to-one correspondence with the stress nodes of the tripod 4. Of course, it is also possible to select that only the connecting members 3 correspond one-to-one to the stress nodes of the tripod 4, and the snow drive 16 drives all the connecting members 3 to reciprocate.
For the convenience of disassembly and assembly, the connecting part 3 can be selected to be detachably and fixedly connected with the stress node of the tripod 4.
In order to facilitate the application of snow load, the connecting member 3 is a connecting rope, the base 1 is provided with a pulley 17, the connecting rope passes around the pulley 17 to turn 90 degrees, and the snow load driving member 16 drives in the horizontal plane.
It will be appreciated that the connecting line is divided by the pulley 17 into two parts, one in the horizontal plane and the other in the vertical plane. The snow load driving part 16 drives the connecting rope in the horizontal plane to move in the horizontal plane, so that the connecting rope in the vertical plane is driven to move, and snow load is applied to the tripod 4.
The specific type of the connecting rope is selected according to actual needs, and in order to improve the service life, the connecting rope may be selected as a steel wire rope, which is not limited in this embodiment.
In order to obtain the magnitude of wind load, the testing device of the tripod for the photovoltaic bracket further comprises a wind load pressure sensor arranged on the wind load applying device, and the wind load pressure sensor is used for detecting the acting force applied by the wind load applying device to the tripod 4.
When the wind load applying device can ensure that the wind load of each stress node is the same, the wind load pressure sensor can be selected to be one, for example, the wind load applying device comprises a driver 6 for acting on the stress node of the tripod 4, the drivers 6 correspond to the stress nodes one by one, at this time, the wind load pressure sensor is only arranged on one driver 6, and specifically, the wind load pressure sensor is arranged on one driver 6 located at the end part along the length direction of the tripod 4.
In order to facilitate the acquisition of the snow load, the testing device of the tripod for the photovoltaic bracket further comprises a snow load pressure sensor arranged on the snow load applying device, and the snow load pressure sensor is used for detecting the acting force applied by the snow load applying device to the tripod 4.
When the snow load applying device can ensure that the snow load of each stress node is the same, the snow load pressure sensor may be selected as one, for example, the snow load applying device includes: a connecting component 3 fixedly connected with a stress node of the tripod 4, a snow-loaded driving component 16 for driving the connecting component 3 to reciprocate; wherein, the connecting component 3 and the snow load driving component 16 are in one-to-one correspondence with the stress nodes of the tripod 4. At this time, the snow load pressure sensor is provided only on one connecting member 3, specifically, on one connecting member 3 located at an end in the length direction of the tripod 4.
The types of the wind load pressure sensor and the snow load pressure sensor are selected according to actual needs, and the present embodiment does not limit this.
In order to realize automatic analysis test data, the testing device of the tripod for the photovoltaic bracket further comprises: displacement sensor, stress sensor, and the industrial computer.
The displacement sensors and the stress sensors are both used for being arranged at stress nodes of the tripod 4, and the displacement sensors and the stress sensors are in one-to-one correspondence with the stress nodes; the displacement sensor is used for detecting the displacement of the tripod 4 at the stress node, and the stress sensor is used for detecting the stress of the tripod 4 at the stress node.
The displacement sensor and the stress sensor can monitor the deflection of the tripod 4 and the change of stress in real time, and guide the optimization design through software analysis.
Specifically, the displacement sensor and the stress sensor are in communication connection with an industrial personal computer, the industrial personal computer is used for comparing the displacement at the stress node with the set deflection of the tripod 4, and if the displacement at each stress node is smaller than the set deflection, the industrial personal computer is used for judging that the deflection of the tripod 4 is qualified; if the displacement of at least one stress node is not less than the set deflection, the industrial personal computer is used for judging that the deflection of the tripod 4 is unqualified; the industrial personal computer is used for comparing the stress at the stress node with the set yield strength of the tripod 4, and if the stress at each stress node is smaller than the set yield strength, the industrial personal computer is used for judging that the yield strength of the tripod 4 is qualified; and if the stress at least one stress node is not less than the set yield strength, the industrial personal computer is used for judging that the yield strength of the tripod 4 is unqualified.
It should be noted that, if the deflection of the tripod 4 is qualified and the yield strength of the tripod 4 is qualified, the tripod 4 is qualified; if the deflection of the tripod 4 is not qualified and/or the yield strength of the tripod 4 is not qualified, the tripod 4 is not qualified.
The types of the displacement sensor and the stress sensor are selected according to actual needs, and this embodiment does not limit this. In order to facilitate the detection of the stress, the stress sensor may be selected as a strain gauge. At this moment, the strain gauge needs to cooperate the strain gauge to use, and the strain gauge passes through strain gauge and industrial computer communication connection promptly. The displacement sensor can be in communication connection with an industrial personal computer through a power line.
The data obtained in the test process can provide reference for manufacturing the tripod 4, and the industrial personal computer is also used for storing detection values of the displacement sensor and the stress sensor in order to store test data.
In order to further optimize the technical scheme, in the testing device of the tripod for the photovoltaic bracket, if the deflection of the tripod 4 is qualified, the industrial personal computer is also used for acquiring the maximum displacement in all stress nodes, and if the difference value between the set deflection and the maximum displacement is within the set displacement range, the industrial personal computer is used for judging that the deflection of the tripod 4 is not over-designed; if the difference value between the set deflection and the maximum displacement is not within the set displacement range, the method is used for judging that the deflection of the tripod 4 is over-designed.
In order to further optimize the technical scheme, in the testing device of the tripod for the photovoltaic bracket, if the deflection of the tripod 4 is unqualified, the industrial personal computer is also used for judging that a stress node with the displacement not less than the set deflection is a weak position of the tripod 4;
correspondingly, if the yield strength of the tripod 4 is qualified, the industrial personal computer is also used for acquiring the maximum stress in all stress nodes, and if the difference value between the set yield strength and the maximum stress is in the set stress range, the industrial personal computer is used for judging that the yield strength of the tripod 4 is not over-designed; if the difference value between the set deflection and the maximum stress is not within the set stress range, the method is used for judging that the yield strength of the tripod 4 is over-designed; and if the yield strength of the tripod 4 is unqualified, the industrial personal computer is also used for judging that the stress node with the stress not less than the set yield strength is a weak position of the tripod 4.
In order to describe the industrial personal computer more specifically, the workflow of the industrial personal computer is described below specifically.
As shown in fig. 8, the work flow of the industrial personal computer is as follows:
comparing the displacement at the stressed node with the set deflection of the tripod 4;
if the displacement of each stress node is smaller than the set deflection, the deflection of the tripod 4 is judged to be qualified; if the displacement of at least one stress node is not less than the set deflection, judging that the deflection of the tripod 4 is unqualified and the stress node with the displacement not less than the set deflection is a weak position;
if the deflection of the tripod 4 is qualified, acquiring the maximum displacement in all the stress nodes;
judging whether the difference value between the set deflection and the maximum displacement is within the set displacement range, if so, judging that the deflection of the tripod 4 is not over-designed; if not, the deflection of the tripod 4 is judged to be over-designed.
As shown in fig. 9, the work flow of the industrial personal computer is as follows:
comparing the stress at the stress node with the set yield strength of the tripod 4;
if the stress at each stress node is smaller than the set yield strength, judging that the yield strength of the tripod 4 is qualified; if the stress at least one stress node is not less than the set yield strength, judging that the yield strength of the tripod 4 is unqualified and the stress node with the stress not less than the set yield strength is a weak position;
if the yield strength of the tripod 4 is qualified, acquiring the maximum stress in all stress nodes;
judging whether the difference value between the set yield strength and the maximum stress is within the set stress range, if so, judging that the yield strength of the tripod 4 is not over-designed; if not, the yield strength of the tripod 4 is judged to be over-designed.
In the practical application process, in order to conveniently judge whether the deflection and the yield strength of the tripod 4 are qualified, the industrial personal computer can form a displacement deformation cloud picture according to data detected by the displacement sensor and a stress cloud picture according to data detected by the stress sensor. Therefore, the displacement of the stress point and the set deflection of the tripod 4 can be easily compared through the displacement deformation cloud picture, whether the tripod 4 is over-designed or not can be easily judged, and the weak position of the tripod 4 can be easily judged; through the stress cloud chart, the stress at the stress point and the set yield strength of the tripod 4 can be easily compared, whether the tripod 4 is over-designed or not can be easily judged, and the weak position of the tripod 4 can be easily judged.
It should be noted that the abscissa of the displacement deformation cloud chart is the serial number corresponding to each stress node of the tripod 4, and the ordinate of the displacement deformation cloud chart is the displacement corresponding to each stress node; the abscissa of the stress cloud chart is the serial number corresponding to each stress node of the tripod 4, and the ordinate of the stress cloud chart is the stress corresponding to each stress node.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (20)

1. The utility model provides a testing arrangement of tripod for photovoltaic support which characterized in that includes: the base (1) is used for installing the tripod (4), the bearing beam (7) is arranged on the base (1), the wind load applying device is arranged on the bearing beam (7) and used for applying wind load to the tripod (4), and the snow load applying device is arranged on the base (1) and used for applying snow load to the tripod (4).
2. A testing device according to claim 1, characterized in that the carrier beam (7) is intended to be arranged parallel to the force-bearing surface of the tripod (4).
3. The testing device according to claim 2, characterized in that the carrier beam (7) is a straight beam, and the angle between the carrier beam (7) and the horizontal direction is adjustable.
4. The testing device according to claim 3, characterized in that the base (1) is provided with a support frame, both ends of the carrier beam (7) are fixed on the support frame, and both ends of the carrier beam (7) are adjustable in height.
5. The testing device of claim 4, wherein the support frame comprises: a first upright (5) and a second upright (14) both fixed to the base (1), a first movable cross-beam (10) removably fixed to the first upright (5), and a second movable cross-beam (15) removably fixed to the second upright (14); one end of the bearing beam (7) is fixed to the first movable cross beam (10), the other end of the bearing beam (7) is fixed to the second movable cross beam (15), the position of the first movable cross beam (10) in the height direction of the first upright column (5) is adjustable, and the position of the second movable cross beam (15) in the height direction of the second upright column (14) is adjustable.
6. The testing device of claim 5, wherein the support frame further comprises: the lifting device comprises a first reinforcing cross beam (9) fixedly connected with the top of the first upright column (5), a second reinforcing cross beam (12) fixedly connected with the top of the second upright column (14), a first lifting sling (8) arranged on the first reinforcing cross beam (9), and a second lifting sling (13) arranged on the second reinforcing cross beam (12); wherein the first movable beam (10) is moved to a desired position by the first lifting sling (8) and the second movable beam (15) is moved to a desired position by the second lifting sling (13).
7. The testing device according to claim 5, characterized in that said first upright (5) and said second upright (14) are each at least two;
the support frame still includes: a first reinforcing beam (9) fixedly connected with the top of the first upright (5), and/or a second reinforcing beam (12) fixedly connected with the top of the second upright (14), and/or a first reinforcing beam (11) fixedly connected with the first upright (5) and the second upright (14), and/or a second reinforcing beam (2) fixedly connected with the first upright (5) and the second upright (14);
wherein the first reinforcing beam (11) is positioned at the top of the first upright (5) and the second upright (14), the top of one of the first upright (5) and the second upright (14) is fixedly connected with one end of the second reinforcing beam (2), and the bottom of the other one of the first upright (5) and the second upright (14) is fixedly connected with the other end of the second reinforcing beam (2).
8. A testing device according to claim 3, characterized in that the tripod (4) is a tripod for a double-slope assembly, the carrier beam (7) being deformable so that the carrier beam (7) is intended to be arranged parallel to the force-bearing surface of the tripod for a double-slope assembly.
9. The test device of claim 8,
the base (1) is provided with a support frame, two ends of the bearing beam (7) are fixed on the support frame, and the heights of the two ends of the bearing beam (7) are adjustable;
the bearing beam (7) comprises at least two straight beam sections, any two straight beam sections are sequentially distributed along the length direction of the bearing beam (7), and the adjacent two straight beam sections (7) are hinged.
10. A testing device according to claim 2, characterized in that the tripod (4) is a tripod for a double-slope assembly, and the carrier beam (7) is arranged in parallel with the force-bearing surface of the tripod for a double-slope assembly.
11. A test device according to claim 10, characterized in that the carrier beam (7) is V-shaped or inverted V-shaped.
12. The testing device according to claim 1, characterized in that the wind load exerting device is capable of exerting wind pressure load and wind suction load on the tripod (4);
the wind load applying device is arranged on the top side of the tripod (4), and the snow load applying device is arranged on the bottom side of the tripod (4).
13. The testing device of claim 1, wherein the wind load applying device comprises: the driver (6) can act on the stress node of the tripod (4), and the driver (6) corresponds to the stress node one by one.
14. The test device of claim 13,
the driver (6) is an air cylinder, and the wind load applying device further comprises a first control module for controlling the air pressure of each air cylinder;
or the driver (6) is a hydraulic cylinder, and the wind load applying device further comprises a second control module for controlling the hydraulic pressure of each hydraulic cylinder;
or the driver (6) comprises a motor and a push rod, the push rod can act on the stress node, and the motor drives the push rod to move in a reciprocating mode.
15. The test device of claim 1, wherein the snow load application device comprises: the snow load driving device comprises a connecting part (3) fixedly connected with a stress node of the tripod (4), and a snow load driving part (16) for driving the connecting part (3) to move in a reciprocating manner; the connecting component (3) and the snow load driving component (16) are in one-to-one correspondence with stress nodes of the tripod (4).
16. A test device according to claim 15, characterized in that the connecting member (3) is a connecting rope, the base (1) is provided with a pulley (17), the connecting rope is wound around the pulley (17) to turn 90 °, and the snow-carrying drive member (16) is driven in a horizontal plane.
17. The testing device of claim 1, further comprising:
the wind load pressure sensor is arranged on the wind load applying device and used for detecting acting force applied to the tripod (4) by the wind load applying device;
and the snow load pressure sensor is arranged on the snow load applying device and is used for detecting acting force applied to the tripod (4) by the snow load applying device.
18. The testing device of any one of claims 1-17, further comprising: the displacement sensor, the stress sensor and the industrial personal computer;
the displacement sensors and the stress sensors are both used for being arranged at stress nodes of the tripod (4), and the displacement sensors and the stress sensors are in one-to-one correspondence with the stress nodes;
the displacement sensor is used for detecting the displacement of the tripod (4) at a stress node, and the stress sensor is used for detecting the stress of the tripod (4) at the stress node;
the displacement sensor and the stress sensor are both in communication connection with the industrial personal computer, the industrial personal computer is used for comparing the displacement of the stress node with the set deflection of the tripod (4), and if the displacement of each stress node is smaller than the set deflection, the industrial personal computer is used for judging that the deflection of the tripod (4) is qualified; if the displacement of at least one stress node is not less than the set deflection, the industrial personal computer is used for judging that the deflection of the tripod (4) is unqualified; the industrial personal computer is used for comparing the stress at the stress nodes with the set yield strength of the tripod (4), and if the stress at each stress node is smaller than the set yield strength, the industrial personal computer is used for judging that the yield strength of the tripod (4) is qualified; and if the stress at least one stress node is not less than the set yield strength, the industrial personal computer is used for judging that the yield strength of the tripod (4) is unqualified.
19. The testing device of claim 18, wherein the industrial personal computer is further configured to store detection values of the displacement sensor and the stress sensor.
20. The test device of claim 18,
if the deflection of the tripod (4) is qualified, the industrial personal computer is also used for acquiring the maximum displacement in all the stress nodes, and if the difference value between the set deflection and the maximum displacement is within the set displacement range, the industrial personal computer is used for judging that the deflection of the tripod (4) is not over-designed; if the difference value between the set deflection and the maximum displacement is not within the set displacement range, the method is used for judging that the deflection of the tripod (4) is over-designed;
if the deflection of the tripod (4) is unqualified, the industrial personal computer is also used for judging that the stressed node with the displacement not less than the set deflection is a weak position of the tripod (4);
if the yield strength of the tripod (4) is qualified, the industrial personal computer is further used for obtaining the maximum stress in all the stress nodes, and if the difference value between the set yield strength and the maximum stress is within a set stress range, the industrial personal computer is used for judging that the yield strength of the tripod (4) is not over-designed; if the difference value between the set deflection and the maximum stress is not within the set stress range, the method is used for judging that the yield strength of the tripod (4) is over-designed;
and if the yield strength of the tripod (4) is unqualified, the industrial personal computer is also used for judging that the stress node with the stress not less than the set yield strength is a weak position of the tripod (4).
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