Equipment for testing physical properties of thermal insulation material

Abstract

The invention discloses a thermal insulation material physical property testing device, which comprises a main body frame and a first direction servo shaft, the main body frame is provided with a working table for placing a to-be-tested object, the two opposite sides of the working table are respectively provided with a first bottom plate and a second bottom plate, and the first direction servo shaft is connected with the first direction servo shaft. The first bottom plate is fixedly connected with the main body frame, and the second bottom plate is connected to the first direction servo shaft so as to be driven by the first direction servo shaft to be close to or away from the first bottom plate. According to the test equipment provided by the invention, test 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 performed at one time, so that the performance test efficiency is greatly improved.

Description

Technical Field

[0001] The invention belongs to the technical field of thermal insulation material testing and relates to a device for testing the physical properties of thermal insulation materials. Background Art

[0002] Polyurethane or EPS insulation materials are produced by online mixing and continuous foaming of multi-component raw materials. The products are suitable for thermal insulation in industrial sectors such as construction, transportation, petroleum, chemical industry, electricity, refrigeration, etc., and the temperature is suitable for -164℃ to 110℃. In order to independently develop the reliability and effectiveness of low-temperature insulation materials for liquefied gas ships, it is particularly important to verify the characteristics and physical and mechanical properties of polyurethane, EPS (expandable polystyrene) or similar insulation materials.

[0003] As the thermal insulation material for liquefied gas ships, the most commonly used are polyurethane foam blocks, EPS (expandable polystyrene) or similar thermal insulation material foam blocks, which must at least meet the physical properties of tensile strength, compression strength and bending resistance, as well as performance effectiveness at -190°C. The existing equipment and methods for various performance tests of foam block materials still tend to test each performance independently, and there is no systematic method or equipment that can perform performance tests of foam block materials in a unified, accurate and efficient manner; and 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 apply reasonable force during the test to avoid damage to the thermal insulation material foam blocks and affect the test results, which is still an important problem that needs to be solved urgently. Summary of the invention

[0004] In order to overcome the deficiencies of the prior art, the present invention provides a device for testing the physical properties of thermal insulation materials.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A device for testing the physical properties of thermal insulation materials, comprising a main frame and a first direction servo axis, wherein the main frame is provided with a work surface for placing an object to be tested, and a first bottom plate and a second bottom plate are respectively provided on opposite sides of the work surface, wherein the first bottom plate is fixedly connected to the main frame, and the second bottom plate is connected to the first direction servo axis so as to move closer to or farther away from the first bottom plate under the drive of the first direction servo axis; and further comprising a connecting structure, wherein the number of the connecting structures is two and the connecting structures are respectively provided at opposite ends of the object to be tested, and the connecting structures are respectively connected to the first bottom plate and the second bottom plate.

[0007] Furthermore, the connection structure includes an end panel and a side panel, the end panel is fixed to the end of the object to be tested, the side panels are respectively arranged on both sides of the object to be tested, and the two end panels are respectively connected to the first bottom plate and the second bottom plate.

[0008] Furthermore, it also includes an external bracket, which is fixedly connected to the end panel, and an adjustment bolt is threadedly inserted into the external bracket, one of the side panels is fixedly connected to the end panel, and the other side panel is movably connected to the end panel and abuts against one end of the adjustment bolt.

[0009] Furthermore, it also includes a support frame and a slide rail, the support frame is connected to the second base plate, the support frame is slidably connected to the slide rail, and the telescopic end of the first direction servo axis is fixedly connected to the support frame.

[0010] Furthermore, it also includes a second direction servo axis, which is arranged below the object to be tested close to one side of the second base plate, and the telescopic end of the second direction servo axis presses upward against the bottom of the object to be tested, forming a driving force for the object to be tested to bend relative to the first base plate.

[0011] Furthermore, a transverse plate is provided at the telescopic end of the second direction servo shaft, bearing frames are provided at both ends of the transverse plate, a roller is provided on the transverse plate, and both axial ends of the roller are respectively connected to the bearing frames.

[0012] Furthermore, it also includes a crossbeam, which is fixedly connected to the main frame, and is arranged above the side of the object to be tested close to the first bottom plate, and the crossbeam abuts against the top of the object to be tested.

[0013] Furthermore, it also includes an ultra-low temperature liquid tank, in which a hollow cavity is arranged. The ultra-low temperature liquid tank is arranged at the bottom of the work surface and contacts with the work surface.

[0014] Furthermore, the number of the ultra-low temperature liquid tanks is set to be multiple, and they are arranged in an array along the connection direction of the first bottom plate and the second bottom plate.

[0015] In summary, the present invention is beneficial in that:

[0016] The test equipment provided by the present invention forms test conditions that can stably set up polyurethane, EPS (expandable polystyrene) or similar thermal insulation material foam blocks of various sizes through a work table and a bidirectional force-bearing table, and can perform integrated compression, tension and bending performance tests at one time, greatly improving the efficiency of performance testing; the polyurethane, EPS (expandable polystyrene) or similar thermal insulation material foam blocks and the force-bearing table are reasonably connected through a connecting structure, so that the position and force of the foam blocks in the test are more unified and stable and uniform, making the test results more authentic, and effectively avoiding the negative impact caused by the brittleness of polyurethane, EPS (expandable polystyrene) or similar thermal insulation material foam blocks, and avoiding local damage to the connection part of the thermal insulation material foam blocks and the equipment as much as possible, thereby reducing the impact on the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the testing equipment of the present invention.

[0018] Figure 2 for Figure 1 Schematic diagram of the structure from another perspective.

[0019] Figure 3 for Figure 2 A is an enlarged schematic diagram.

[0020] Figure 4 for Figure 1 Schematic diagram of the cross-section structure in.

[0021] Figure 5 Schematic diagram of the structure of the bending drive device.

[0022] Markings in the figure: 1. Main frame; 11. Work surface; 12. First bottom plate; 13. Second bottom plate; 14. Crossbeam; 21. First direction servo axis; 22. Slide rail; 23. Support frame; 3. Polyurethane or EPS foam block; 31. End panel; 32. Side panel; 33. External bracket; 34. Adjusting bolt; 4. Second direction servo axis; 41. Cross plate; 42. Bearing frame; 43. Roller; 5. Ultra-low temperature liquid tank. DETAILED DESCRIPTION

[0023] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0024] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and thus the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0025] All directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, horizontal, vertical...) are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0026] Due to installation errors and other reasons, the parallel relationship referred to in the embodiments of the present invention may actually be an approximately parallel relationship, and the vertical relationship may actually be an approximately vertical relationship.

[0027] The present invention 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 a continuous foaming production process. In this embodiment, the polyurethane, EPS (expandable polystyrene) or similar foam block thermal insulation material is specifically a rectangular foam block 3 with settable length, width and height dimensions.

[0028] Reference Figure 1 and Figure 2 The device includes a main frame 1, which is a fixed truss structure. The top of the main frame 1 forms a working surface 11 for placing the bubble block 3. The opposite sides of the working surface 11 respectively form a first force-bearing surface and a second force-bearing surface. The bubble block 3 is set between the first force-bearing surface and the second force-bearing surface for setting operation.

[0029] The first force-bearing table surface is fixedly arranged and includes a first bottom plate 12 . The first bottom plate 12 is fixedly connected to the main frame 1 , and one end of the bubble block 3 is supported on the first bottom plate 12 .

[0030] The second force-bearing table surface is movably arranged, and includes a second base plate 13, which is driven by a tension and compression driving device. The tension and compression driving device includes a support frame 23, a slide rail 22 and a first direction servo axis 21. The second base plate 13 is arranged opposite to the first base plate 12. The second base plate 13 is fixedly connected to the support frame 23. The slide rail 22 is arranged on the main frame 1, and the setting direction of the slide rail 22 is the same direction as the connection direction between the first base plate 12 and the second base plate 13. The bottom of the support frame 23 is slidably matched with the slide rail 22, so that the support frame 23 can move along the slide rail 22, and then the second base plate 13 can achieve the approach / distance between the second base plate 13 and the first base plate 12 by moving along the slide rail 22.

[0031] The movement of the second base 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, and the telescopic direction is the same as the direction of the slide rail 22. A force sensor and a speed sensor are arranged at the end of the telescopic end to monitor the test data in real time.

[0032] The bubble block 3 to be tested is arranged on the work surface 11 and is 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 second bottom plate 13 is driven and moved by the first direction servo shaft 21 to realize the pulling / compressing effect on the bubble block 3, thereby testing the tensile / compressive physical properties of the polyurethane or EPS bubble block material.

[0033] Furthermore, one of the preferred testing methods includes setting a displacement ruler on the surface of the bubble block 3, which can be specifically a linear displacement sensor, and fixing one or more linear displacement sensors at multiple test positions on the surface of the bubble block 3 by bonding or other fixing methods. During bonding, the two ends of the linear displacement sensor that move relatively to each other are respectively bonded to two positions on the bubble block along the test direction, so that after the tension or compression test, the change in the telescopic distance reading of the linear displacement sensor is read, and the tensile mark or compression performance of the bubble block 3 after pulling or pressing is obtained.

[0034] In order to ensure the reasonable fixing effect of the bubble block 3 and the first bottom plate 12 or the second bottom plate 13, the two ends of the bubble block 3 are also provided with connecting structures for connecting with the first bottom plate 12 or the second bottom plate 13, referring to Figure 3The connection structure includes an end panel 31 and a side panel 32. The end panel 31 is tightly attached to the end surface of the bubble block 3 facing the first bottom plate 12 or the second bottom plate 13; the side panel 32 is an L-shaped structure, one side of the L-shape of the side panel 32 is tightly attached to the side wall of the bubble block 3, and the other side is tightly attached to the end panel 31. There are two side panels 32 in one connection structure, and they are respectively arranged on opposite sides of the bubble block 3, one of which is a fixed side panel 32, which is fixedly connected to the end panel 31, and the other is a movable side panel 32, which is movably connected to the end panel 31.

[0035] The end panel 31 is provided with a slide groove, and the movable side panel 32 is provided with a sliding portion for extending into the slide groove, and the sliding portion can be a fixing pin penetrated on the movable side panel 32, and the cooperation between the sliding portion and the slide groove enables the movable side panel 32 to move along the slide groove direction, that is, the movable side panel 32 moves in the direction of the side wall of the bubble block 3 close to or away from the bubble block 3; further, an outer bracket 33 is also provided, and the outer bracket 33 is fixedly connected to the end panel 31, and a nut is fixedly provided on the outer bracket 33, and an adjusting bolt 34 is penetrated and threadedly connected in the nut, and one end of the adjusting bolt 34 abuts against the movable side panel 32, and the axial direction of the adjusting bolt 34 is in the same direction as the direction of the slide groove, and then by rotating the adjusting bolt 34, it is pushed toward the movable side panel 32 along its own axial direction, so that the movable side panel 32 is pressed 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.

[0036] In which, during the compression and tensile tests, the end panels 31 on both sides are respectively detachably fixedly connected to the first bottom plate 12 and the second bottom plate 13, and the connection methods include but are not limited to connection through bolts, etc., to ensure the relative position relationship between the bubble block 3 and the double-sided bottom plates.

[0037] Furthermore, a bending test drive device is also provided, referring to Figure 5 , including a second direction servo shaft 4 arranged below the work surface 11, the second direction servo shaft 4 is arranged in the vertical direction and is located directly below the side of the bubble block 3 close to the second bottom plate 13, and a through groove is provided on the work surface 11 for the telescopic end of the second direction servo shaft 4 to contact the bubble block 3 upward; when performing an anti-bending test, the end panel 31 close to the first bottom plate 12 is fixedly connected to the first bottom plate 12, and the second bottom plate 13 is driven away from the corresponding end panel 31 by the first direction servo shaft 21, and the telescopic end of the second direction servo shaft 4 is pressed against the bubble block 3 upward and applies a continuous thrust to perform an anti-bending test, and a force sensor and a speed sensor are also provided at the telescopic end of the second direction servo shaft 4 to monitor the test data in real time.

[0038] In order to avoid excessive interaction force between the telescopic end of the second direction servo shaft 4 and the bubble block 3, which may cause local damage to the surface of the bubble block 3 and affect the test results, in this embodiment, the telescopic end of the second direction servo shaft 4 is also provided with a transverse plate 41, and bearing frames 42 are provided at both ends of the transverse plate 41. A roller 43 is provided on the transverse plate 41, and the axial ends of the roller 43 are respectively connected to the bearing frames 42 on both sides so that the roller 43 can rotate, and the axial direction of the roller 43 is set to be perpendicular to the connecting direction of the first bottom plate 12 and the second bottom plate 13.

[0039] When the second-direction servo shaft 4 is lifted, the outer circumference of the roller 43 contacts the bubble block 3. The length of the roller 43 can be adaptively adjusted, preferably larger 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 evenly stressed, thereby reducing the situation where the bubble block is damaged due to excessive local stress. During the continuous lifting of the second-direction servo shaft 4, the bending of the bubble block 3 will also change the contact position with the roller 43 accordingly. When the rotatability of the roller 43 changes the contact position with the bubble block, the relative action that occurs is the rolling of the roller 43 on the surface of the bubble block, rather than frictional movement. The relative frictional force between the roller 43 and the bubble block is small, thereby further reducing the situation where the bubble block is damaged due to excessive local stress.

[0040] In this embodiment, a cross beam 14 is further provided on the side close to the first bottom plate 12. The cross beam 14 is fixedly connected to the main frame 1. The cross beam 14 is horizontally arranged above the bubble block 3 and abuts against the bubble block 3. A vertical support is added to the support of the end panel 31 of the bubble block 3 on this side. During the bending resistance test, the bubble block 3 is reduced from being squeezed and deformed due to excessive local force on this side.

[0041] The test temperature range of the device provided in this embodiment can be used from room temperature to -190°C. In order to provide performance testing functions under extreme temperature conditions, in this embodiment, reference Figure 4 A plurality of ultra-low temperature liquid tanks 5 are further provided under the work surface 11. The interior of the ultra-low temperature liquid tank 5 is a hollow closed cavity structure. A pipeline for filling liquid nitrogen into the interior is opened on the side of the ultra-low temperature liquid tank 5. The ultra-low temperature liquid tank 5 is in direct contact with the bottom of the work surface 11 to achieve heat transfer. In some embodiments, the ultra-low temperature liquid tank 5 and the work surface 11 are both made of stainless steel, which has corrosion resistance and excellent thermal conductivity.

[0042] Among them, the multiple ultra-low temperature liquid tanks 5 are arranged in an array in the direction of the connection between the first bottom plate 12 and the second bottom plate 13, so that the ultra-low temperature liquid tanks 5 with corresponding positions and quantities can be selected to reduce the temperature according to the size of the bubble block 3 currently being tested.

[0043] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

Claims

1. A device for testing the physical properties of thermal insulation materials, characterized in that: The invention comprises a main frame (1) and a first direction servo axis (21); the main frame (1) is provided with a work surface (11) for placing an object to be tested; two opposite sides of the work surface (11) are provided with a first bottom plate (12) and a second bottom plate (13); the first bottom plate (12) is fixedly connected to the main frame (1); the second bottom plate (13) is connected to the first direction servo axis (21) so as to move closer to or farther from the first bottom plate (12) under the drive of the first direction servo axis (21); and the invention also comprises a connecting structure, the number of the connecting structures is two and they are respectively provided at the opposite ends of the object to be tested; the connecting structures are respectively connected to the first bottom plate (12) and the second bottom plate (13).

2. The device for testing the physical properties of thermal insulation materials according to claim 1, characterized in that: The connection structure comprises an end panel (31) and a side panel (32), wherein the end panel (31) is fixed to an end of the object to be tested, and the side panels (32) are respectively arranged on both sides of the object to be tested, and the two end panels (31) are respectively connected to the first bottom plate (12) and the second bottom plate (13).

3. The device for testing the physical properties of thermal insulation materials according to claim 2, characterized in that: It also includes an outer bracket (33), the outer bracket (33) is fixedly connected to the end panel (31), and an adjusting bolt (34) is threadedly connected to the outer bracket (33), one of the side panels (32) is fixedly connected to the end panel (31), and the other side panel (32) is movably connected to the end panel (31) and abuts against one end of the adjusting bolt (34).

4. A device for testing physical properties of thermal insulation materials according to any one of claim 2, characterized in that: It also includes a support frame (23) and a slide rail (22), wherein the support frame (23) is connected to the second base plate (13), the support frame (23) is slidably connected to the slide rail (22), and the telescopic end of the first direction servo axis (21) is fixedly connected to the support frame (23).

5. A device for testing physical properties of thermal insulation materials according to any one of claim 2, characterized in that: It also comprises a second direction servo shaft (4), which 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) is pressed upward against the bottom of the object to be tested, thereby generating a driving force for the object to be tested to bend relative to the first bottom plate (12).

6. The device for testing the physical properties of thermal insulation materials according to claim 5, characterized in that: A transverse plate (41) is provided at the telescopic end of the second direction servo shaft (4), bearing frames (42) are provided at both ends of the transverse plate (41), a roller (43) is provided on the transverse plate (41), and the axial ends of the roller (43) are respectively connected to the bearing frames (42).

7. The device for testing the physical properties of thermal insulation materials according to claim 5, characterized in that: It also comprises a crossbeam (14), the crossbeam (14) being fixedly connected to the main frame (1), the crossbeam (14) being arranged above the side of the object to be tested close to the first bottom plate (12), and the crossbeam (14) being abutted against the top of the object to be tested.

8. The device for testing the physical properties of thermal insulation materials according to claim 1, characterized in that: It also comprises an ultra-low temperature liquid tank (5), wherein a hollow cavity is arranged in the ultra-low temperature liquid tank (5), and the ultra-low temperature liquid tank (5) is arranged at the bottom of the work surface (11) and is in contact with the work surface (11).

9. The device for testing the physical properties of thermal insulation materials according to claim 8, characterized in that: The number of the ultra-low temperature liquid tanks (5) is set to be multiple, and they are arranged in an array along the connection direction of the first bottom plate (12) and the second bottom plate (13).

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