Equipment for testing physical properties of thermal insulation material

Abstract

The utility model discloses equipment for testing physical properties of a thermal insulation material, which comprises a main body frame, a tension and compression driving device and a bending driving device, and a working platform for placing an object to be tested is arranged on the main body frame. The two opposite sides of the working platform are provided with stress table surfaces used for fixing the two ends of an object to be tested. The tension and compression driving device is connected with one stress table top and is used for driving the stress table top to be close to or far away from the other stress table top; and the bending driving device is arranged at the bottom of the to-be-tested object. According to the testing equipment provided by the utility model, testing conditions capable of stably setting polyurethane, EPS (Expandable Polystyrene) or similar foam block thermal insulation materials with various sizes are formed through the working table top and the bidirectional stress table top, and integrated compression resistance, tensile resistance and bending resistance performance tests can be carried out at one time, so that the performance testing efficiency is greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to polyurethane material test technical field relates to a device for testing the physical properties of thermal insulation materials. BACKGROUND

[0002] Polyurethane or EPS thermal insulation material is produced by on-line mixing of multi-component raw materials in a continuous foaming process, and the product is suitable for thermal insulation in the building, transportation, petroleum, chemical, power, refrigeration and other industrial sectors, and the temperature is suitable for -164 DEG C to 110 DEG C. In order to independently develop the reliability and effectiveness of low-temperature thermal insulation materials for liquefied gas carriers, it is particularly important to verify the characteristics and physical and mechanical properties of polyurethane, EPS (expandable polystyrene) or similar thermal insulation materials.

[0003] As thermal insulation materials for liquefied gas carriers, the most commonly used are polyurethane foam blocks, EPS (expandable polystyrene) or similar thermal insulation material foam blocks, which at least meet the physical properties of tensile, compressive and bending resistance, and the performance effectiveness at -190 DEG C. The existing equipment and methods for testing the performance of foam block materials tend to test each performance independently, and there is no systematic method or equipment to test the performance of foam block materials uniformly, accurately and efficiently. The brittleness of polyurethane, EPS (expandable polystyrene) or similar thermal insulation material foam blocks is the biggest influencing factor in performance testing, especially how to reasonably fix and reasonably apply force to avoid damage to the thermal insulation material foam blocks and affect the test results. At present, this is still an important problem to be solved. UTILITY MODEL CONTENT

[0004] The utility model discloses in order to overcome the insufficient of prior art, provide a device for testing the physical properties of thermal insulation materials.

[0005] In order to realize the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] A device for testing the physical properties of thermal insulation materials, comprising a main frame, a tension and compression driving device, and a bending driving device, the main frame is provided with a workbench for placing the object to be tested, and the opposite sides of the workbench are provided with force receiving tables for fixing the two ends of the object to be tested. The tension and compression driving device is connected with one of the force receiving tables and is used to drive the force receiving table to move closer to or away from the other force receiving table. The bending driving device is arranged at the bottom of the object to be tested and provides a bending force to the object to be tested relative to one of the force receiving tables.

[0007] Further, the force-receiving platform comprises a first bottom plate and a second bottom plate arranged on opposite sides of the working platform respectively, the first bottom plate is fixedly connected with the main frame, and the second bottom plate is connected with the tension-compression driving device.

[0008] Further, the connecting structure is arranged on opposite ends of the object to be tested, and comprises an end plate and a side plate, the end plate is fixed to the end of the object to be tested, and the side plate is arranged on the side of the object to be tested.

[0009] Further, the outer support is fixedly connected with the end plate, an adjusting bolt is threadedly connected to the outer support, one side plate is fixedly connected with the end plate, and the other side plate is movably connected with the end plate and abuts against one end of the adjusting bolt.

[0010] Further, the tension-compression driving device comprises a first direction servo shaft, a support frame and a sliding rail, the support frame is connected with the second bottom plate, the support frame is slidably connected with the sliding rail, and the telescopic end of the first direction servo shaft is fixedly connected with the support frame.

[0011] Further, the bending driving device comprises a second direction servo shaft, the second direction servo shaft is arranged below the side of the object to be tested close to the second bottom plate, and the telescopic end of the second direction servo shaft abuts against the bottom of the object to be tested.

[0012] Further, the telescopic end of the second direction servo shaft is provided with a horizontal plate, bearing frames are arranged at two ends of the horizontal plate, a roller is arranged on the horizontal plate, and the two ends of the roller are connected with the bearing frames respectively.

[0013] Further, the cross beam is fixedly connected with the main frame, the cross beam is arranged above the side of the object to be tested close to the first bottom plate, and the cross beam abuts against the top of the object to be tested.

[0014] Further, the liquid tank is arranged on the bottom of the working platform and is in contact with the working platform.

[0015] Further, the liquid tank is arranged on the bottom of the working platform and is in contact with the working platform.

[0016] In conclusion, the utility model has the advantages of:

[0017] The utility model provides a test equipment, through the workstation surface and the two -way stress platform surface form to the test condition that polyurethane, EPS (the polystyrene of expandable) or similar heat preservation material bubble piece of many sizes can be stably arranged, can carry out the performance test of compression resistance, tensile resistance, bending resistance in one time, greatly improved the efficiency of performance test, the reasonable connection mode of connecting structure between polyurethane, EPS (the polystyrene of expandable) or similar heat preservation material bubble piece and stress platform surface makes the position and stress of bubble piece in the test more unified and stable even, makes the test result more authenticity, and effectively avoids the negative influence of the fragility of polyurethane, EPS (the polystyrene of expandable) or similar heat preservation material bubble piece, avoids the local damage of heat preservation material bubble piece and equipment connecting part as far as possible to reduce the influence on test result. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the structural schematic diagram of test equipment of the utility model.

[0019] Figure 2 It is Figure 1 It is the structural schematic diagram of another view in another view.

[0020] Figure 3 It is Figure 2 It is the enlarged diagram of A in

[0021] Figure 4 It is Figure 1 It is the sectional structure schematic diagram in

[0022] Figure 5 It is the structural schematic diagram of bending drive arrangement.

[0023] Identification in drawing: 1, main body frame;11, workstation surface;12, first bottom plate;13, second bottom plate;14, crossbeam;21, first direction servo shaft;22, slide rail;23, support frame;3, polyurethane bubble piece;31, end face plate;32, side plate;33, outer support;34, adjusting bolt;4, second direction servo shaft;41, cross plate;42, bearing frame;43, roller;5, ultralow temperature liquid tank. DETAILED DESCRIPTION

[0024] The following will be explained by specific concrete example the embodiment of the utility model, and the person skilled in the art can easily understand other advantages and effects of the utility model from the content disclosed in the specification.The utility model can also be implemented or applied by another different specific embodiment, and each detail in the specification can be based on different viewpoints and applications, and various modifications or changes can be made without departing from the spirit of the utility model.It should be noted that the following examples and features in the examples can be combined with each other without conflict.

[0025] It should be noted that the diagrams provided in the following embodiments only illustrate the basic concept of the present application in a schematic manner, and only show the components related to the present application in the diagrams, not according to the number, shape and size of the components during actual implementation. The shape, number and proportion of each component during actual implementation can be changed arbitrarily, and the component layout pattern can also be more complex.

[0026] All directional indications (such as up, down, left, right, front, back, transverse, longitudinal, etc.) in the embodiments of the present application are only used to explain the relative position relationship, movement condition, etc. between components in a certain specific posture, and if the specific posture changes, the directional indications will also change accordingly.

[0027] Due to installation errors and other reasons, the parallel relationship referred to in the embodiments of the present application may actually be an approximate parallel relationship, and the perpendicular relationship may actually be an approximate perpendicular relationship.

[0028] The present application provides a device for testing the physical properties of thermal insulation materials, specifically, a performance testing device for polyurethane, EPS (expandable polystyrene) or similar thermal insulation materials under continuous foaming production process. In this embodiment, the polyurethane, EPS (expandable polystyrene) or similar foam block thermal insulation material is specifically a cuboid foam block 3 with settable length, width and height dimensions.

[0029] Referring to Figure 1 and Figure 2 , the device comprises a main frame 1, which is a fixed truss structure. The top of the main frame 1 forms a workbench 11 for placing foam blocks 3. The opposite sides of the workbench 11 form a first force receiving table and a second force receiving table, respectively. The foam blocks 3 are arranged between the first force receiving table and the second force receiving table for setting operation.

[0030] The first force receiving table is fixedly arranged and comprises a first bottom plate 12, which is fixedly connected to the main frame 1. One end of the foam block 3 is supported on the first bottom plate 12.

[0031] The second force receiving platform is movably arranged and comprises a second bottom plate 13 driven by a tension and compression driving device. The tension and compression driving device comprises a support frame 23, a slide rail 22 and a first direction servo shaft 21. The second bottom plate 13 is arranged opposite to the first bottom plate 12. The second bottom plate 13 is fixedly connected to the support frame 23. The slide rail 22 is arranged on the main frame 1 and arranged in the same direction along the line between the first bottom plate 12 and the second bottom plate 13. The bottom of the support frame 23 is slidably connected to the slide rail 22, so that the support frame 23 can move along the slide rail 22. Thus, the second bottom plate 13 can move along the slide rail 22 to approach or move away from the first bottom plate 12.

[0032] The movement of the second bottom plate 13 and the support frame 23 on the slide rail 22 is realized by the first direction servo shaft 21. The first direction servo shaft 21 is fixedly arranged on the main frame 1. The telescopic end of the first direction servo shaft 21 is fixedly connected to the support frame 23. The telescopic direction is the same as the direction of the slide rail 22. The end of the telescopic end is provided with a force sensor and a speed sensor to monitor the test data in real time.

[0033] The bubble block 3 to be tested is arranged on the workbench 11 and located between the first bottom plate 12 and the second bottom plate 13. The two ends of the bubble block 3 are fixed to the first bottom plate 12 and the second bottom plate 13 respectively. The driving movement of the second bottom plate 13 by the first direction servo shaft 21 realizes the tension and compression of the bubble block 3, so as to test the tensile and compressive physical properties of the polyurethane or EPS bubble block material.

[0034] Further, one preferred test method comprises arranging displacement scales on the surface of the bubble block 3, which can be linear displacement sensors. One or more linear displacement sensors are fixed on the surface of the bubble block 3 at multiple test positions by adhesion or other fixing methods. When adhesion is used, the two ends of the linear displacement sensor that move relative to each other are respectively adhered to two positions on the bubble block in the test direction. After tension or compression test, the extension distance reading change of the linear displacement sensor is read to obtain the tension or compression performance of the bubble block 3 after tension or compression.

[0035] In order to ensure the reasonable fixing effect of the bubble block 3 to the first bottom plate 12 or the second bottom plate 13, the two ends of the bubble block 3 are respectively provided with connecting structures for connection with the first bottom plate 12 or the second bottom plate 13. For details, please refer to Figure 3The connecting structure comprises an end panel 31 and a side panel 32, the end panel 31 is close to the end face of the bubble block 3 towards the first bottom plate 12 or the second bottom plate 13; the side panel 32 is in L-shaped structure, one side of the L-shaped structure is close to the side wall of the bubble block 3, and the other side is close to the end panel 31, the number of the side panel 32 in one connecting structure is two, and the two side panels are respectively arranged on the opposite sides of the bubble block 3, one of which is a fixed side panel 32 which is fixedly connected with the end panel 31, and the other is a movable side panel 32 which is movably connected with the end panel 31.

[0036] The end panel 31 is provided with a sliding groove, the movable side panel 32 is provided with a sliding part for extending into the sliding groove, the sliding part can be a fixed pin penetrating the movable side panel 32, the cooperation between the sliding part and the sliding groove enables the movable side panel 32 to move along the direction of the sliding groove, that is, the movable side panel 32 moves towards or away from the side wall of the bubble block 3; further, an outer support 33 is provided, the outer support 33 is fixedly connected with the end panel 31, a nut is fixedly arranged on the outer support 33, an adjusting bolt 34 is threadedly connected in the nut, one end of the adjusting bolt 34 abuts against the movable side panel 32, the axial direction of the adjusting bolt 34 is the same as the direction of the sliding groove, and then the adjusting bolt 34 is rotated to push towards the movable side panel 32 along the axial direction of the adjusting bolt 34, so that the movable side panel 32 is abutted against the side wall of the bubble block 3 by the adjusting bolt 34, and the bubble block 3 is clamped and fixed by the movable side panel 32 and the fixed side panel 32.

[0037] In the compression and tension test, the end panel 31 on both sides is respectively detachably fixedly connected with the first bottom plate 12 and the second bottom plate 13, and the connection mode includes but is not limited to the connection by the bolt and the like, so as to ensure the relative position relationship between the bubble block 3 and the double-side bottom plate.

[0038] Further, a bending test driving device is provided, referring to Figure 5 The second direction servo shaft 4 is arranged below the workbench surface 11 and is arranged in the vertical direction, located directly below the bubble block 3 on the side close to the second bottom plate 13, and the workbench surface 11 is provided with a through groove for the extension end of the second direction servo shaft 4 to contact the bubble block 3 upwards; in the bending test, the end panel 31 close to the first bottom plate 12 is fixedly connected with the first bottom plate 12, the second bottom plate 13 is driven by the first direction servo shaft 21 to move away from the corresponding end panel 31, and the extension end of the second direction servo shaft 4 abuts against the bubble block 3 upwards and applies a continuous pushing force, so as to perform the bending test, and the extension end of the second direction servo shaft 4 is also provided with a force sensor and a speed sensor, so as to monitor the test data in real time.

[0039] In order to avoid the interaction force between the telescopic end of the second direction servo shaft 4 and the bubble block 3 being too large to cause local damage to the surface of the bubble block 3 and affect the test results, in the embodiment, the telescopic end of the second direction servo shaft 4 is also provided with a horizontal plate 41, both ends of the horizontal plate 41 are provided with bearing frames 42, a roller 43 is arranged on the horizontal plate 41, and the axial ends of the roller 43 are connected to the bearing frames 42 on both sides respectively, so that the roller 43 can rotate, and the axial direction of the roller 43 is perpendicular to the connecting line direction of the first bottom plate 12 and the second bottom plate 13.

[0040] When the second direction servo shaft 4 is lifted, the outer periphery of the roller 43 is in contact with the bubble block 3, the length of the roller 43 can be adjusted adaptively, and is preferably greater than the width of the bubble block 3, so as to increase the contact area and ensure that the bottom of the bubble block 3 is uniformly stressed, thereby reducing the case that the bubble block is locally damaged due to excessive stress.

[0041] In the embodiment, a cross beam 14 is also arranged near the side of the first bottom plate 12, the cross beam 14 is fixedly connected to the main frame 1, the cross beam 14 is arranged above the bubble block 3 and abuts against the bubble block 3, and on the basis of supporting the end face plate 31 of the bubble block 3 on this side, a vertical support is added, so as to reduce the case that the bubble block 3 is locally pressed and deformed due to excessive stress on this side during the bending resistance test.

[0042] The test temperature range of the device provided in the embodiment can be used at room temperature to -190℃, in order to provide performance test function under extreme temperature condition, in the embodiment, referring to Figure 4 , a plurality of ultra-low temperature liquid tanks 5 are also arranged below the workbench top 11, the inside of the ultra-low temperature liquid tank 5 is a hollow closed cavity structure, a pipeline for pouring liquid nitrogen into the inside is arranged on the side of the ultra-low temperature liquid tank 5, the ultra-low temperature liquid tank 5 directly contacts the bottom of the workbench top 11 to realize heat transfer, and in some embodiments, the materials of the ultra-low temperature liquid tank 5 and the workbench top 11 are stainless steel, which has corrosion resistance and excellent heat conductivity.

[0043] Among them, a plurality of the ultra-low temperature liquid tanks 5 are arranged in an array in the connecting line direction between the first bottom plate 12 and the second bottom plate 13, so that corresponding positions and numbers of the ultra-low temperature liquid tanks 5 can be selected and used for temperature reduction according to the size of the current tested bubble block 3.

[0044] Obviously, the described embodiments are only part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should belong to the scope of protection of the present application.

Claims

1. An apparatus for testing the physical properties of an insulating material, characterized by The utility model provides a test object bending and stretching device, including main body frame (1), tension and compression driving device and bending driving device, worktable surface (11) for placing the object to be tested is arranged on the main body frame (1), the opposite two sides on the worktable surface (11) are provided with the force platform for fixing the both ends of the object to be tested, the tension and compression driving device is connected with one of the force platform, is used for driving the force platform relative to the other force platform relative close or far away, the bending driving device is arranged at the bottom of the object to be tested, and the pushing force that forms relative one of the force platform bending to the object to be tested.

2. The apparatus for testing physical properties of thermal insulation according to claim 1, characterized in that, The force platform includes first bottom plate (12) and second bottom plate (13) arranged on the opposite two sides of the work platform respectively, the first bottom plate (12) is fixedly connected with the main body frame (1), and the second bottom plate (13) is connected with the tension and compression driving device.

3. The apparatus for testing physical properties of thermal insulation according to claim 2, characterized in that, It also includes a connecting structure, the number of the connecting structure is two and is arranged at the opposite two ends of the object to be tested respectively, the connecting structure includes end panel (31) and side plate (32), the end panel (31) is fixed to the end of the object to be tested, the side plate (32) is arranged on the two sides of the object to be tested respectively, and the two end panels (31) are connected with the first bottom plate (12) and the second bottom plate (13) respectively.

4. The apparatus for testing physical properties of thermal insulation according to claim 3, wherein, It also includes an outer support (33), the outer support (33) is fixedly connected with the end panel (31), the outer support (33) is threadedly connected with an adjusting bolt (34), one of the side plates (32) is fixedly connected with the end panel (31), the other side plate (32) is movably connected with the end panel (31) and abuts one end of the adjusting bolt (34).

5. A device for testing physical properties of thermal insulation materials according to any of claims 2-4, characterized in that, The tension and compression driving device includes a first direction servo shaft (21), a support frame (23) and a slide rail (22), the support frame (23) is connected with the second bottom plate (13), the support frame (23) is slidably connected with the slide rail (22), and the telescopic end of the first direction servo shaft (21) is fixedly connected with the support frame (23).

6. An apparatus for testing the physical properties of thermal insulation according to any one of claims 2-4, characterised in that, The bending driving device includes a second direction servo shaft (4), the second direction servo shaft (4) is arranged below the side of the object to be tested close to the second bottom plate (13), and the telescopic end of the second direction servo shaft (4) abuts the bottom of the object to be tested upwards.

7. The apparatus for testing physical properties of thermal insulation according to claim 6, characterized in that, The telescopic end of the second direction servo shaft (4) is provided with a cross plate (41), both ends of the cross plate (41) are provided with bearing frames (42), a roller (43) is arranged on the cross plate (41), and both ends of the roller (43) are connected with the bearing frames (42) respectively.

8. The apparatus for testing physical properties of thermal insulation according to claim 6, wherein, It also includes a cross beam (14), the cross beam (14) is fixedly connected with the main body frame (1), the cross beam (14) is arranged above the side of the object to be tested close to the first bottom plate (12), and the cross beam (14) abuts the top of the object to be tested.

9. The apparatus for testing physical properties of thermal insulation material according to claim 1, wherein, The ultra-low temperature liquid tank (5) is provided with a hollow cavity, is arranged at the bottom of the workbench top (11), and is in contact with the workbench top (11).

10. The apparatus for testing physical properties of thermal insulation material according to claim 9, characterized in that, The number of the ultra-low temperature liquid tank (5) is multiple, and the ultra-low temperature liquid tank (5) is arranged in an array along the connecting line direction of the first bottom plate (12) and the second bottom plate (13).

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