Ice shelf factory static test device and test method

Abstract

A test method for an ice shelf factory static test device, step 1, a variable amplitude cylinder connection seat is set on a vertical plane of a test bench, and the ear plate on the variable amplitude cylinder connection seat is connected to the ear plate on the ice shelf through a pin shaft; the lifting ring is directly sleeved on the ice shelf lifting shaft, and the lifting ring is connected to a tension sensor; the hydraulic pump station is connected to the test cylinder through a pipeline; the tension sensor is connected and fixed to the lifting ring and the test cylinder through a pin shaft respectively; step 2, a manual pump is used to slowly apply pressure, and each time 10% to 15% of the ice shelf test load value is loaded. Step 3, observe the data on the instrument and the data on the pressure gauge. Step 4, slowly load step by step until the test is stopped after the maximum test load capacity of the ice shelf is reached. The present invention can safely and reliably carry out static factory tests of ice shelves with any load, is not affected by the environment, and can be tested in any open place; effectively ensure the validity and accuracy of the measured data, and the service life is more than 20 years.

Description

Technical Field

[0001] The present invention relates to the field of ships, and in particular to an ice shelf factory static test device and a test method. Background Art

[0002] The ice shelf static test device and test method are mainly used for the factory test of the ice shelf of fishing vessels. At present, there are few design cases, especially the corresponding design standards and calculation methods. There is still no mature template internationally and domestically. The ice shelf is subjected to tensile load under load, and tests need to be carried out to verify its structural bearing capacity and assembly characteristics. The common method in China is generally to fix the ice shelf structure on the base of the crane and complete the small-tonnage ice shelf test by hanging heavy objects or weights. The advantage is that it saves the cost of making the test bench. The disadvantage is that it can only complete the small-tonnage ice shelf test, and the operation is cumbersome, the labor intensity of the operator is high, and the efficiency is low. It cannot be applied to large-tonnage ice shelves because it is unsafe and cannot find suitable heavy objects and weights to test, or it cannot find a site or platform that can withstand large-tonnage tensile tests and cannot conduct ice shelf factory tests. The inability of enterprises to conduct ice shelf factory tests means that they do not have the ability to produce such products, which means that they have lost the competitiveness of such products.

[0003] Therefore, there is an urgent need for a test device and test method with a simple structure, large load-bearing capacity, easy production and manufacturing, good interchangeability, stable performance, easy disassembly and assembly, convenient maintenance, simple and safe operation, which can solve both the static factory test of small-tonnage ice shelves and the factory test of large-tonnage ice shelves. Summary of the invention

[0004] The purpose of the present invention is to provide an ice shelf factory static test device and test method, which can solve the problems existing in the above-mentioned prior art and is not only safe and accurate for small-tonnage ice shelf tests, but also for large-tonnage ice shelf factory tests.

[0005] The objective of the present invention is achieved in this way. A static test device for an ice rack factory includes a hydraulic pump station, a tension sensor instrument, and a test bench, and is characterized in that: the test bench is arranged in a stepped manner, and the test cylinder connecting ear at one end of the test cylinder is connected to a connecting plate arranged on the first step of the test bench through a first pin shaft, and a manual pump is arranged on the left side of the connecting plate; the other end of the test cylinder is connected to the tension sensor through a second pin shaft, and the other end of the tension sensor is connected to a lifting ring through a third pin shaft; an ice rack hinge connecting seat is arranged on the horizontal plane of the second step of the test bench, and a variable-length cylinder connecting seat is arranged on the vertical plane of the second step; the other end of the lifting ring is connected to the ice rack, and the other end of the ice rack is connected to the ice rack hinge connecting seat, and the ear plate at one end of the variable-length cylinder connecting seat is connected to the ear plate on the ice rack.

[0006] Preferably: the test bench is welded with DH36 high-strength steel plates, is an integral welded part, and forms a frame structure, which can withstand bending stress ≥5280kN.m, tensile stress ≥3586kN.m, and compressive stress ≥3586kN.m.

[0007] Preferably, the ice shelf hinge connection seat is fixed on the second step of the test bench by welding.

[0008] Preferably, the connecting seat of the variable amplitude oil cylinder is fixed on the test bench by bolt connection.

[0009] Preferably, the tension sensor instrument is connected to the tension sensor via a line interface.

[0010] Preferably, the manual pump is connected to the test oil cylinder via a pipeline and a pipeline joint.

[0011] Preferably, the position error between the center of the vertical plane of the second step of the test bench and the center of the connecting seat of the variable amplitude oil cylinder is 3-5 mm.

[0012] Preferably, the maximum amplitude variation angle of the ice shelf is 100°.

[0013] The present invention is composed of a mechanical structure, a hydraulic system, a transmission system and a control system. It can safely and reliably carry out static factory tests on ice shelves with any load. The operation is safe, simple and convenient, and it is not affected by the environment. It can be placed in any open place for testing. It effectively guarantees the validity and accuracy of the measured data. The designed service life of the ice shelf test device is more than 20 years. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the present invention;

[0015] Figure 2 It is a schematic diagram of the test bench structure in the present invention;

[0016] Figure 3 for Figure 1 A top view of the ice shelf, ice shelf hinge connection seat, and luffing cylinder connection seat installed on the test bench;

[0017] Figure 4 for Figure 1 A-direction view;

[0018] In the figure: 1. Hydraulic pump station; 2. Tension sensor instrument; 3. Manual pump; 4. Test cylinder connection eye; 5. Test cylinder; 6. Test bench; 7. Third pin; 8. Tension sensor; 9. Lifting ring; 10. Ice shelf; 11. Ice shelf hinge connection seat; 12. Boom cylinder connection seat; 13. First step; 14. Second step; 15. Connecting plate; 16. First pin; 17. Second pin. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0020] A static test device for an ice shelf factory includes a hydraulic pump station 1, a tension sensor instrument 2, and a test bench 6, characterized in that: the test bench 6 is arranged in a stepped manner, and the test cylinder connecting ear 4 at one end of the test cylinder 5 is connected to a connecting plate 15 arranged on the first step 13 of the test bench through a first pin shaft, and a manual pump 3 is arranged on the left side of the connecting plate 15; the other end of the test cylinder 5 is connected to the tension sensor 8 through a second pin shaft 17, and the other end of the tension sensor 8 is connected to a lifting ring 9 through a third pin shaft 7; an ice shelf hinge connecting seat 11 is arranged on the horizontal plane of the second step 14 of the test bench, and a variable-length cylinder connecting seat 12 is arranged on the vertical plane of the second step 14; the other end of the lifting ring 9 is connected to the ice shelf 10, and the other end of the ice shelf 10 is connected to the ice shelf hinge connecting seat 11, and the ear plate at one end of the variable-length cylinder connecting seat 12 is connected to the ear plate on the ice shelf 10.

[0021] The test bench is welded with DH36 high-strength steel plates, is an integral welded part, and forms a frame structure, which can withstand bending stress ≥5280kN.m, tensile stress ≥3586kN.m, and compressive stress ≥3586kN.m.

[0022] The ice shelf hinge connection seat 11 is fixed on the second step of the test bench by welding, and is used to fix the ice shelf structure, and is the main force-bearing member during the operation of the ice shelf.

[0023] The luffing oil cylinder connection seat 12 is fixed on the test bench by bolt connection, and is easy to disassemble and has good interchangeability.

[0024] The tension sensor instrument 2 is connected to the tension sensor 8 via a line interface;

[0025] The manual pump 3 is connected to the test oil cylinder 5 via a pipeline and a pipeline joint.

[0026] The position error between the center of the second step 14 of the test bench 6 on the vertical plane and the center of the connecting seat of the variable amplitude oil cylinder is 3-5 mm.

[0027] The maximum amplitude variation angle of the ice shelf 10 is 100°

[0028] A test method for an ice shelf factory static test device, characterized in that: step 1, connecting and fixing various components: a luffing cylinder connection seat is fixed on a vertical plane of a test bench by bolt connection, and a lug plate on the luffing cylinder connection seat is connected to a lug plate on the ice shelf by a pin; a lifting ring is directly sleeved on a lifting shaft of the ice shelf, and the lifting ring is connected to a tension sensor; a hydraulic pump station is directly connected to a test cylinder by a pipeline and a pipeline joint; the tension sensor is respectively connected and fixed to the lifting ring and the test cylinder by a pin;

[0029] Step 2: Use a tension sensor instrument with a digital display model: GGD-338; use a manual pump model: CP-150S, use a pressure gauge with a range of 0~100MPa, adjust the value to 0, operate the manual pump to slowly apply pressure, and gradually load within 10%~15% of the ice shelf test load value each time.

[0030] Step 3: Observe the data on the instrument and the pressure gauge and record them.

[0031] Step 4: Load slowly step by step until the maximum test load-bearing capacity of the ice shelf is reached and then stop the test. During the test, record the data displayed by each instrument.

[0032] Embodiment 1:

[0033] The data on the ice shelf test instrument and pressure gauge on the 82-meter trawl deep-processing fishing vessel are as follows:

[0034] Table 1

[0035] Ice shelf test load value (tons) Pressure on the manual pump pressure gauge (MPa) 10 3 20 6.5 30 10 40 13 45 15 50 17 55 18.5 60 20 65 22 70 24 75 25 80 26

[0036] Operate the manual pump to slowly apply pressure. The test load value of the ice shelf on the 82-meter trawl frozen deep processing fishing vessel is 10%~15% of 80 tons each time.

[0037] During specific implementation, the welding deformation of the test bench and the position of the boom cylinder connecting seat need to be controlled during the manufacture of the device. The position error between the center of the second step of the test bench on the vertical plane and the center of the boom cylinder connecting seat is 3-5mm; the maximum boom angle of the ice shelf is 100°.

[0038] The device of the present invention has been tested on two ice shelves on 82-meter trawl deep-processing fishing vessels. The test process is time-saving, labor-saving, simple, convenient, safe and reliable. It has won unanimous praise from customers. At the same time, it has also greatly enhanced the competitiveness of ice shelf products.

[0039] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An ice shelf factory static test device, comprising a hydraulic pump station (1), a tension sensor instrument (2), and a test bench (6), characterized in that: The test bench (6) is arranged in a stepped manner; a test cylinder connecting ear (4) at one end of the test cylinder (5) is connected to a connecting plate (15) arranged on a first step (13) of the test bench through a first pin shaft, and a manual pump (3) is arranged on the left side of the connecting plate (15); the other end of the test cylinder (5) is connected to a tension sensor (8) through a second pin shaft (17), and the other end of the tension sensor (8) is connected to a lifting ring (9) through a third pin shaft (7); an ice shelf hinge connection seat (11) is arranged on a horizontal plane of the second step (14) of the test bench, and a variable-length cylinder connection seat (12) is arranged on a vertical plane to the second step (14); the other end of the lifting ring (9) is connected to an ice shelf (10), and the other end of the ice shelf (10) is connected to the ice shelf hinge connection seat (11), and the ear plate at one end of the variable-length cylinder connection seat (12) is connected to the ear plate on the ice shelf (10).

2. The ice shelf factory static test device according to claim 1, characterized in that: The test bench is welded with DH36 high-strength steel plates, is an integral welded part, and forms a frame structure, which can withstand bending stress ≥5280kN.m, tensile stress ≥3586kN.m, and compressive stress ≥3586kN.m.

3. The ice shelf factory static test device according to claim 1, characterized in that: The ice shelf hinge connection seat (11) is fixed on the second step of the test bench by welding.

4. The ice shelf factory static test device according to claim 1, characterized in that: The luffing oil cylinder connection seat (12) is fixed on the test bench by bolt connection.

5. The ice shelf factory static test device according to claim 1, characterized in that: The tension sensor instrument (2) and the tension sensor (8) are connected via a line interface.

6. The ice shelf factory static test device according to claim 1, characterized in that: The manual pump (3) is connected to the test oil cylinder (5) via a pipeline and a pipeline joint.

7. The ice shelf factory static test device according to claim 1, characterized in that: The position error between the center of the second step (14) of the test bench (6) on the vertical plane and the center of the boom cylinder connecting seat is 3-5 mm.

8. The ice shelf factory static test device according to claim 1, characterized in that: The maximum amplitude variation angle of the ice shelf (10) is 100°.

9. The test method of the ice shelf factory static test device according to claim 1, characterized in that: Step 1: Connect and fix each component: The boom cylinder connection seat is fixed on the vertical plane of the test bench by bolts, and the ear plate on the boom cylinder connection seat is connected to the ear plate on the ice shelf by a pin; the lifting ring is directly mounted on the ice shelf lifting shaft, and the lifting ring is connected to the tension sensor; the hydraulic pump station is directly connected to the test cylinder through pipelines and pipeline joints; the tension sensor is connected and fixed to the lifting ring and the test cylinder by pins respectively; Step 2: Use a tension sensor instrument with a digital display of model: GGD-338; Use a manual pump of model: CP-150S, and adjust the pressure gauge value with a range of 0~100MPa to 0, operate the manual pump to slowly apply pressure, and gradually load within 10%~15% of the ice shelf test load value each time; Step 3: Observe the data on the instrument and the data on the pressure gauge, and record them; Step 4: Load slowly step by step until the test is stopped after the maximum test bearing capacity of the ice shelf is reached. During the test, record the data displayed by each instrument.

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