KR20150025134A - Load testing apparatus for lifting lug - Google Patents

Load testing apparatus for lifting lug Download PDF

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Publication number
KR20150025134A
KR20150025134A KR20130102367A KR20130102367A KR20150025134A KR 20150025134 A KR20150025134 A KR 20150025134A KR 20130102367 A KR20130102367 A KR 20130102367A KR 20130102367 A KR20130102367 A KR 20130102367A KR 20150025134 A KR20150025134 A KR 20150025134A
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KR
South Korea
Prior art keywords
load
holding portion
lifting lug
load holding
lifting
Prior art date
Application number
KR20130102367A
Other languages
Korean (ko)
Inventor
이재희
Original Assignee
현대중공업 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 현대중공업 주식회사 filed Critical 현대중공업 주식회사
Priority to KR20130102367A priority Critical patent/KR20150025134A/en
Publication of KR20150025134A publication Critical patent/KR20150025134A/en

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N13/00—Investigating surface or boundary effects, e.g. wetting power; Investigating diffusion effects; Analysing materials by determining surface, boundary, or diffusion effects
    • 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
    • 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
    • G01N2203/0048—Hydraulic means

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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)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)

Abstract

The present invention relates to a load test apparatus for a lifting lug, comprising a first load holding portion including a through hole at both ends thereof, a through hole corresponding to the through hole at both ends thereof, A load holding portion passing through the through hole and the through groove together with a load holding portion and a lifting lug, and a hydraulic ram for lifting the first load holding portion along the through groove at the upper end of the second load holding portion. Therefore, the load testing device for lifting lugs is easy to manufacture and assemble the equipment, has little space limitation in use, and can be quickly tested by a small number of workers.

Description

[0001] LOAD TESTING APPARATUS FOR LIFTING LUG [0002]

The present invention relates to a load test apparatus for a lifting lug, and more particularly, to a load test apparatus for a lifting lug, which is easy to manufacture and assemble equipment, has a limited space limitation in use and can be quickly tested for a lifting lug by a small number of workers To a load test apparatus for a lifting lug.

In general, many vessels are installed in the vessel, and lifting lugs are installed on top of the equipment to repair these vessels. Here, the lifting lug must be able to withstand and fully support the load of the equipment before use. Lifting lugs typically test whether they can lift 1.25 times the designed load through a load test, and only the lifting lugs that have passed the test are issued for use by the operator and are used during line operation.

Korean Utility Model Laid-Open No. 20-2011-0003159 discloses a lifting lug rod test apparatus that can load-test a lifting lug using a compression load cell and a hydraulic cylinder without using a crane or a chain block. Such a lifting lug rod test apparatus can increase the operation rate of the production equipment, can secure the work stability by accurately applying the load, and can work with a minimum number of workers, thereby improving workability.

Korean Utility Model Application Laid-Open No. 20-2009-0010323 discloses a lug mounting structure for block lifting of a ship in which a lug can be quickly installed on a lug fitting member when lifting of a block is required. Such a block lifting lug installation structure of the ship can quickly remove and recover the lug from the lug engagement member, reuse the recovered lug, and remove the existing lug welded to the block without using the welding torch It is not necessary to carry out a separate milling process and it is possible to solve the problem that the coating film of the block is damaged by the welding heat or the leading equipment in the block is damaged.

Korean Public Utility Model No. 20-2011-0003159 Korean Public Utility Model No. 20-2009-0010323

An embodiment of the present invention is to provide a load test apparatus for a lifting lug that is easy to manufacture and assemble equipment, has little space limitation in use, and can quickly test a lifting lug by a small number of workers.

An embodiment of the present invention seeks to provide a load test apparatus for a lifting lug in which the installation of a crane for load testing and an additional lifting lug is unnecessary, thereby reducing the cost.

Among the embodiments, the load test apparatus for a lifting lug includes a first load holding portion including a through hole at both ends thereof, a through groove corresponding to the through hole at both ends thereof, and a second load A load supporting portion passing through the through hole and the through groove with the holding portion and the lifting lug, and a hydraulic ram for lifting the first load holding portion along the through groove at the upper end of the second load holding portion.

In one embodiment, the first load-retaining portion and the second load-retaining portion may be formed in an open form with one side facing the ground.

In one embodiment, the second load holding portion may include a reinforcing member that connects two surfaces of three surfaces to increase the supporting strength.

In one embodiment, the hydraulic ram can be connected to a meter and a hydraulic pump, and the meter can measure the hydraulic pressure of the hydraulic pump.

The load test apparatus for a lifting lug according to an embodiment of the present invention is easy to manufacture and assemble equipment, has little space limitation in use, and can be quickly tested by a small number of operators.

The load test apparatus for a lifting lug according to an embodiment of the present invention does not require the installation of a crane for loading test and additional lifting lugs, thereby reducing the cost.

1 is a view showing a method of measuring a load of a conventional lifting lug.
2 is a perspective view illustrating a load test apparatus for a lifting lug according to an embodiment of the present invention.
3 is a perspective view for explaining an embodiment of the second load holding portion in Fig.
4 is a perspective view illustrating another embodiment of the load test apparatus for the lifting lug shown in Fig.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly explain the present invention, parts not related to the description are omitted, and like parts are denoted by similar reference numerals throughout the specification

1 is a view showing a method of measuring a load of a conventional lifting lug.

1 is a view for explaining a method using a chain block, and FIG. 1B is a view for explaining a method using a crane.

In the method using the chain block shown in FIG. 1A, a tensile meter or a load cell is connected to the chain block, and the load is measured through the additional lug. However, the method using the chain block can be used where the crane is not supported, but the additional lug is required, and the weight of the chain block itself is heavy, so a lot of manpower is required to measure the load of the lifting lug.

In the method using the crane of FIG. 1B, the load display is mounted on the lifting lug, and the load is lifted by a crane. However, the method using the crane has lowered the operation rate of the production equipment and difficulty in applying the correct load during the test preparation and test, resulting in a decrease in safety in operation. In addition, there is a risk that the lifting lug and the load display may be damaged when the crane malfunctions, and the test can be performed only where the crane is supported.

2 is a perspective view illustrating a load test apparatus for a lifting lug according to an embodiment of the present invention.

Referring to FIG. 2, the load testing apparatus 200 for a lifting lug includes a first load holding portion 210, a second load holding portion 220, a load supporting portion 230, and a hydraulic ram 240.

The first load holding portion 210 is formed of a plate whose one surface is directed toward the ground, and a through hole is formed at the same position at both ends. The first load retaining portion 210 has a predetermined height such that the hydraulic ram 240 disposed at the upper ends of the second load retaining portion 220 and the second load retaining portion 220 may be disposed therein Lt; / RTI >

In one embodiment, the diameter of the through-hole may be in the range of 45 mm to 55 mm.

The second load holding portion 220 is disposed inside the first load holding portion 210 and is formed as a plate whose one surface is open toward the ground, May be formed. Here, the second load holding portion 220 may have a constant height so that the lifting lug 10 can be disposed therein.

In one embodiment, the through-hole may be recessed toward the upper end from the lower end of the side surface of the second load holding portion 220. For example, the through-hole may be recessed from the lower side of the second load holding portion 220 formed in the shape of a plate whose one surface facing the ground is opened to the upper end.

In one embodiment, the second load holding portion 220 may be joined to the reinforcing member 320 that connects two surfaces of three surfaces to increase the strength of the support. More specifically, as the hydraulic ram 240 installed at the upper end of the second load holding portion 220 applies a larger amount of force to lift the first load holding portion 210, The second load holding portion 220 may be damaged. As shown in FIG. 3, the reinforcing member 320 connecting between the two side surfaces of the second load holding part 220 may be welded to prevent the damage by the reaction force.

2, the load supporting portion 230 includes through holes formed at both ends of the first load holding portion 210, through grooves formed at both ends of the second load holding portion 220, and lifting lugs 10 in the lateral direction It can be formed in the shape of a through bar.

In one embodiment, the diameter of the load supporting portion 230 may be 25 to 50 mm. Here, as the diameter of the load supporting portion 230 increases, the endurance pressure increases, and the load supporting portion 230 can support a large load.

The hydraulic ram 240 is connected to the hydraulic pump and the meter, and includes a cylinder that rises by receiving hydraulic pressure from the hydraulic pump. More specifically, the hydraulic ram 240 is installed at the upper end of the second load holding portion 220, and can raise the cylinder through the supplied hydraulic pressure to lift up the first load holding portion, and the through hole, Pressure can be transmitted to the lifting lug 10 through the load supporting portion 230 passing through the lug 10. [ Also, the amount of hydraulic pressure applied through the meter connected to the hydraulic ram 240 can be measured to obtain a value required for calculation of the load of the lifting lug 10. Here, the hydraulic ram 240 can increase the diameter of the cylinder in proportion to the magnitude of the load to be measured.

The load test apparatus for a lifting lug 200 is configured to measure the cylinder area of the hydraulic ram 240 installed at the upper end of the second load holding portion 220 and the hydraulic pressure of the hydraulic pump 240 connected to the hydraulic ram 240 The load of the lifting lug 10 can be measured.

4 is a perspective view illustrating another embodiment of the load test apparatus for the lifting lug shown in Fig.

4, the load test apparatus 400 for a lifting lug includes a first load holding portion 410, a second load holding portion 420, a load supporting portion 430, and a hydraulic ram 440. Here, the shapes and functions of the second load holding portion 420 and the load supporting portion 430 are the same as those of the embodiment of FIG.

The first load holding portion 410 is formed of a chain such as a chain and is connected to both ends of the load supporting portion 430. More specifically, the first load holding portion 410 having a chain shape is connected to one end of the load supporting portion 430, the center of the chain is mounted on the upper end of the hydraulic ram 440, (430). ≪ / RTI >

The second load holding portion 420 may be formed as a plate whose one surface is open toward the ground. The second load holding portion 420 may be formed with a through-hole, and may connect two surfaces of the three surfaces of the second load holding portion 420 A reinforcing member for increasing the supporting strength can be joined.

The load supporting portion 430 is connected to the first load holding portion 410 and is formed in a shape of a bar passing through the lifting lug 10 in the through groove formed at both ends of the second load holding portion 420 .

The hydraulic ram 440 is connected to the hydraulic pump and the meter and includes a cylinder which is lifted by receiving hydraulic pressure from the hydraulic pump. The cylinder can form a mounting groove in which the first load holding portion 410 is mounted on the upper end .

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the present invention as defined by the following claims It can be understood that

10: Lifting lugs
200: Load test device for lifting lugs
210: first load holding portion
220: second load holding portion
230: load supporting member
240: Hydraulic Ram
320: reinforcing member

Claims (5)

A first load holding portion including a through hole at both ends thereof;
A second load holding portion including penetrating grooves corresponding to the through holes at both ends and positioned in the first load holding portion;
A load supporting portion passing through the through hole and the through groove together with the lifting lug; And
And a hydraulic ram for lifting the first load holding portion along the through groove at the upper end of the second load holding portion.
2. The apparatus according to claim 1, wherein the first load holding portion and the second load holding portion
Wherein the one surface facing the ground is formed in an open form.
3. The apparatus of claim 2, wherein the second load-
And a reinforcing member for connecting the two surfaces of the three surfaces to increase the strength of the load.
The hydraulic system according to claim 1, wherein the hydraulic ram
Wherein the load test device is connected to the meter and the hydraulic pump.
5. The apparatus of claim 4, wherein the meter
And the hydraulic pressure of the hydraulic pump is measured.
KR20130102367A 2013-08-28 2013-08-28 Load testing apparatus for lifting lug KR20150025134A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR20130102367A KR20150025134A (en) 2013-08-28 2013-08-28 Load testing apparatus for lifting lug

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR20130102367A KR20150025134A (en) 2013-08-28 2013-08-28 Load testing apparatus for lifting lug

Publications (1)

Publication Number Publication Date
KR20150025134A true KR20150025134A (en) 2015-03-10

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20170001511U (en) * 2015-10-21 2017-05-02 삼성중공업 주식회사 Load tester
CN110108545A (en) * 2019-05-17 2019-08-09 河南航天精工制造有限公司 Fixture for the laterally pulled test of lifting lug
CN113820115A (en) * 2021-09-24 2021-12-21 无锡威孚力达催化净化器有限责任公司 Double-shaft lifting lug fatigue performance testing device
KR102479263B1 (en) * 2021-09-15 2022-12-20 김주호 Load testing apparatus

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20170001511U (en) * 2015-10-21 2017-05-02 삼성중공업 주식회사 Load tester
CN110108545A (en) * 2019-05-17 2019-08-09 河南航天精工制造有限公司 Fixture for the laterally pulled test of lifting lug
CN110108545B (en) * 2019-05-17 2021-08-06 河南航天精工制造有限公司 Clamp for transverse traction test of lifting lug
KR102479263B1 (en) * 2021-09-15 2022-12-20 김주호 Load testing apparatus
CN113820115A (en) * 2021-09-24 2021-12-21 无锡威孚力达催化净化器有限责任公司 Double-shaft lifting lug fatigue performance testing device

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