Thermal insulation material performance testing device

Abstract

The invention relates to the technical field of thermal insulation material detection, in particular to a thermal insulation material performance testing device which comprises a testing box body, a box cover is detachably installed at the upper end of the testing box body, an extrusion guide assembly is arranged in the testing box body, and the extrusion guide assembly comprises a bearing frame fixedly installed on the rear side wall in the testing box body. The output end of the first electric cylinder penetrates through the bearing frame and is fixedly provided with an extrusion base. The lower end face of the extrusion base is provided with an assembly groove. An elastic extrusion assembly is arranged inside and outside the test box body, and the elastic extrusion assembly comprises an elastic extrusion air bag movably mounted in the assembly groove. The extrusion of the elastic extrusion air bag on the extrusion plate is expanded from the middle to the left side and the right side, so that air at the contact part of the thermal insulation material and the hot wire sensor can be extruded out from the middle position to the outer side, the air can be discharged more quickly by optimizing the extrusion mode, and the thermal insulation material and the hot wire sensor can be in a tight contact state more quickly.

Description

Technical Field

[0001] The invention relates to the technical field of thermal insulation material detection, and in particular to a thermal insulation material performance testing device. Background Art

[0002] Thermal insulation materials refer to materials that can effectively resist heat flow transfer, including thermal insulation materials used to keep heat from being lost and thermal insulation materials that prevent external heat from entering. Excellent resistance to heat flow transfer can meet the thermal environment requirements of building spaces or thermal equipment, while greatly saving energy.

[0003] Thermal conductivity is an important indicator to measure the thermal insulation performance of thermal insulation materials. The smaller the thermal conductivity, the better the thermal insulation performance of the material. The hot wire method is usually used to measure the thermal conductivity of thermal insulation materials. The thermal insulation material performance test device is usually composed of a hot wire probe, a power supply, a control unit, a data acquisition, and a processing system. The hot wire probe contains a hot wire and a temperature sensor. The hot wire is used to generate heat and exchange heat with the material being tested, and the temperature sensor is used to measure the temperature change of the hot wire. The power supply and control unit provide a constant current or voltage to the hot wire and control the measurement process. The data acquisition and processing system collects the signal from the hot wire probe and calculates the thermal conductivity of the material.

[0004] In the existing technical solution, the hot wire is embedded or placed in the material to be tested. The heat exchange between the hot wire and the material will cause the temperature of the hot wire to change. By measuring the resistance change of the hot wire, the temperature change of the hot wire can be calculated, thereby obtaining the thermal conductivity of the material. However, when the hot wire is embedded or placed in the material to be tested, if there is poor contact or gaps, heat transfer will be blocked, thereby affecting the measurement of thermal conductivity. Summary of the invention

[0005] The purpose of the present invention is to provide a thermal insulation material performance testing device, in which the elastic extrusion airbag squeezes the extrusion plate from the middle to the left and right sides, so that the air at the contact point between the thermal insulation material and the hot wire sensor can be squeezed out from the middle position to the outside. By optimizing the extrusion method, the air can be discharged faster, and the thermal insulation material and the hot wire sensor can reach a close contact state faster, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a thermal insulation material performance testing device, comprising a test box, a box cover is detachably installed on the upper end of the test box, an extrusion guide assembly is arranged inside the test box, the extrusion guide assembly comprises a carrier frame fixedly installed on the rear side wall inside the test box, a first electric cylinder is fixedly installed on the upper end of the carrier frame, an output end of the first electric cylinder passes through the carrier frame and is fixedly installed with an extrusion seat, and a lower end surface of the extrusion seat is provided with an assembly groove; An elastic extrusion component is commonly provided inside and outside the test box, and the elastic extrusion component includes an elastic extrusion airbag movably installed inside the assembly groove, and storage grooves corresponding to the elastic extrusion airbags are provided on the left and right side walls inside the extrusion seat, and a first spring is fixedly installed inside the storage groove, and the end of the first spring away from the storage groove is fixedly connected to the top plate.

[0007] Preferably, the elastic extrusion assembly further comprises an air pump fixedly mounted on the right side wall of the test box, the output end of the air pump is fixedly connected to an air duct, the air duct is embedded in the inner wall of the test box and the end thereof is connected to the elastic extrusion airbag.

[0008] Preferably, the extrusion guide assembly comprises an extrusion plate slidably mounted at the lower end of the assembly groove, and positioning seats are fixedly mounted on both left and right ends of the upper end surface of the extrusion plate.

[0009] Preferably, a test seat is fixedly installed in the middle position inside the test box, and shrinkage grooves are provided at the four corners of the upper end surface of the test seat and the four corners of the lower end surface of the extrusion seat. A second spring is movably installed inside the shrinkage groove, and a positioning assembly rod is fixedly connected to one end of the second spring away from the shrinkage groove.

[0010] Preferably, a sealing and clamping assembly is provided at the connection between the test box body and the box cover, and the sealing and clamping assembly includes an assembly slot opened at the edge of the upper end surface of the test box body, and a clamping ring matching the assembly slot is fixedly installed at the edge of the lower end surface of the box cover.

[0011] Preferably, a sealed air duct is embedded on the side wall of the assembly slot close to the inside of the test box, and the sealed air duct is communicated with the air ducts.

[0012] Preferably, a connecting valve tube is fixedly connected to the tube wall of the sealed air guide tube close to the inside of the test box, the connecting valve tube penetrates the inner wall of the test box and extends to the inside of the test box, and the connecting valve tube is arranged to be inclined downward.

[0013] Preferably, a test matching assembly is provided on the left side of the test box, and the test matching assembly includes a second electric cylinder fixedly mounted on the left inner wall of the test box, the telescopic end of the second electric cylinder is fixedly connected to a loading frame, and a hot wire sensor is fixedly mounted on the right end of the loading frame.

[0014] Preferably, a cooling and cleaning assembly is arranged on the left side inside the test box and above the test matching assembly. The cooling and cleaning assembly comprises an air supply pipe embedded in the left inner wall of the test box, and the output end of the air supply pipe is fixedly connected to a control valve pipe.

[0015] Preferably, a connecting pipe is fixedly installed at the right end of the control valve pipe, and a jet hole corresponding to the hot wire sensor is opened on the pipe wall of the connecting pipe.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention can elastically extrude the extrusion plate inside the assembly groove through the elastic expansion of the elastic extrusion airbag, so that the extrusion plate can elastically extrude the thermal insulation material. After the thermal insulation material is elastically extruded, the gaps and bubbles inside the thermal insulation material will be compressed, making the material tighter, which helps to reduce the thermal bridge effect and heat loss inside the material, thereby improving the accuracy of the test; during the test process, the thermal insulation material may be deformed due to temperature changes or external forces. The extrusion effect of the elastic extrusion airbag can maintain the stability of the material to prevent it from affecting the test results due to deformation. This stability is crucial for accurately measuring the thermal conductivity of the material.

[0017] 2. The elastic extrusion airbag provided in the present invention expands the extrusion of the extrusion plate from the middle to the left and right sides, so that the air at the contact point between the thermal insulation material and the hot wire sensor can be squeezed out from the middle position to the outside. The extrusion expands from the middle to both sides, which can ensure that the contact between the thermal insulation material and the hot wire sensor is closer and the air gap between the two is reduced. When the air is squeezed out from the middle position to the outside, the thermal bridge effect of the air between the thermal insulation material and the hot wire sensor is reduced, thereby reducing heat loss. By optimizing the extrusion method, the air can be discharged faster, so that the thermal insulation material and the hot wire sensor can reach a close contact state faster.

[0018] 3. The present invention can make the end face of the sealed air duct and the end face of the clamp ring fit each other through the expansion of the sealed air duct, which can further ensure the tightness of the connection between the clamp ring and the assembly slot, and effectively prevent external air or heat from entering the test area through these gaps. Good sealing is the basis of the accuracy of the hot wire method test, and can avoid external factors from interfering with the test results.

[0019] 4. The present invention can spray gas onto the corresponding hot-wire sensor through the air jet hole on the connecting pipe. The hot-wire sensor may cause measurement errors due to heat accumulation or pollution after working for a long time. The gas sprayed from the air jet hole can quickly cool down the hot-wire sensor, thereby eliminating the error caused by heat accumulation. At the same time, the cleaning process can remove pollutants on the surface of the sensor, ensure the cleanliness of the sensor surface, and thus improve the precision and accuracy of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is the overall structural view of the present invention; Figure 2 This is a schematic diagram of the internal structure of the test box of the present invention; Figure 3 This is a schematic diagram of the bottom end surface structure of the box cover of the present invention; Figure 4 This is a schematic diagram of the half-section structure inside the test box of the present invention; Figure 5 This is a schematic diagram of the structure of the connection between the sealed air guide pipe and the cooling and cleaning component of the present invention; Figure 6 This is a schematic diagram of the structure of the extrusion guide assembly of the present invention; Figure 7 It is a schematic diagram of the structure of the elastic extrusion component of the present invention.

[0022] Description of reference numerals: 1. Test box; 2. Box cover; 3. Elastic extrusion assembly; 301. Air pump; 302. Air guide tube; 303. Elastic extrusion airbag; 304. Top plate; 305. First spring; 306. Storage slot; 4. Extrusion guide assembly; 401. Carrying frame; 402. First electric cylinder; 403. Extrusion seat; 404. Assembly slot; 405. Positioning seat; 406. Extrusion plate; 407. Test seat; 408. Contraction slot; 409. Second spring; 410. Positioning assembly rod; 5. Sealing and pressing assembly; 501. Sealing air guide tube; 502. Assembly slot; 503. Clamp ring; 6. Connecting valve pipe; 7. Cooling and cleaning assembly; 701. Air supply pipe; 702. Control valve pipe; 703. Connecting pipe; 704. Jet hole; 8. Test matching assembly; 801. Second electric cylinder; 802. Loading frame; 803. Hot wire sensor. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] The present invention provides a technical solution: See also Figure 1 , Figure 2 , Figures 5 to 7 A thermal insulation material performance testing device comprises a test box 1, a box cover 2 is detachably mounted on the upper end of the test box 1, a test matching assembly 8 is arranged on the left side of the inside of the test box 1, an extrusion guide assembly 4 is arranged inside the test box 1, and the extrusion guide assembly 4 comprises a carrier frame 401 fixedly mounted on the rear side wall inside the test box 1, a first electric cylinder 402 is fixedly mounted on the upper end of the carrier frame 401, an extrusion seat 403 is fixedly mounted on the output end of the first electric cylinder 402 through the carrier frame 401, and the lower end surface of the extrusion seat 403 is opened. An assembly groove 404 is provided, and the extrusion guide assembly 4 includes an extrusion plate 406 slidably mounted at the lower end of the assembly groove 404, and positioning seats 405 are fixedly mounted on both the left and right ends of the upper end surface of the extrusion plate 406, and a test seat 407 is fixedly mounted at the middle position inside the test box 1, and the four corners of the upper end surface of the test seat 407 and the four corners of the lower end surface of the extrusion seat 403 are provided with contraction grooves 408, and a second spring 409 is movably mounted inside the contraction groove 408, and a positioning assembly rod 410 is fixedly connected to one end of the second spring 409 away from the contraction groove 408; An elastic extrusion component 3 is commonly provided inside and outside the test box 1, and the elastic extrusion component 3 includes an elastic extrusion airbag 303 movably mounted inside the assembly groove 404, and storage grooves 306 corresponding to the elastic extrusion airbag 303 are provided on the left and right side walls inside the extrusion seat 403, and a first spring 305 is fixedly installed inside the storage groove 306, and one end of the first spring 305 away from the storage groove 306 is fixedly connected to the top plate 304, and the elastic extrusion component 3 also includes an air pump 301 fixedly mounted on the right side wall of the test box 1, and the output end of the air pump 301 is fixedly connected to an air guide tube 302, and the air guide tube 302 is embedded in the inner wall of the test box 1 and the end thereof is connected to the elastic extrusion airbag 303.

[0025] By adopting the above technical solution, when in use, first open the box cover 2 through the handle, so that the thermal insulation material to be tested can be conveniently placed in the test box 1 for testing. First of all, the sample uniformity of the thermal insulation material itself must be ensured. Before testing, two identical thermal insulation material samples should be fully processed and prepared. When conducting thermal conductivity performance testing, one of the thermal insulation materials is placed on the test seat 407, and the positioning holes opened on the thermal insulation material are aligned with the positioning assembly rods 410 on the test seat 407. The thermal insulation material is placed on the test seat 407. At this time, the hot wire sensor 803 of the test matching component 8 is pushed to the middle position of the thermal insulation material. It should be noted here that when the thermal insulation material is subjected to sample uniformity processing, the sample size after being placed on the test seat 407 is required. After the sample is placed on the test seat 407, the upper end surface of the material and the hot wire sensor 803 are on the same horizontal plane; when one of the thermal insulation materials is placed on the test seat 407, the other thermal insulation material is placed Place it on the positioning seat 405, align the positioning hole on the thermal insulation material with the positioning assembly rod 410 on the positioning seat 405, so that the thermal insulation material can be placed on the positioning seat 405. It should be noted here that when the thermal insulation material is placed, the friction between itself and the positioning assembly rod 410 on the positioning seat 405 is greater than the gravity of the thermal insulation material itself, thereby ensuring that the thermal insulation material is stably placed on the positioning seat 405. The positioning assembly rod 410 ensures that the two pieces of thermal insulation material are aligned with each other during testing, thereby eliminating the test error caused by material position deviation. This precise alignment helps to obtain more accurate test results and makes the test data more reliable; when testing the performance of the material multiple times, the positioning assembly rod 410 can ensure that the conditions and settings of each test are consistent, which helps to establish comparability between different tests, thereby more accurately evaluating the performance differences of the materials; positioning processing through the positioning assembly rod 410 can reduce the adjustment and calibration steps during the test process.

[0026] After both thermal insulation materials are placed, the first electric cylinder 402 on the carrier 401 is started. The carrier 401 can provide stable support for the first electric cylinder 402. The first electric cylinder 402 can push the positioning seat 405 to move downward, so that the extrusion plate 406 on the lower end surface of the positioning seat 405 can squeeze the thermal insulation materials placed on the test seat 407, so that the two thermal insulation materials can fit more closely with the hot wire sensor 803. When the thermal insulation materials and the hot wire sensor 803 fit closely, the heat transfer path can be ensured. The accuracy and consistency of the diameter can improve the accuracy of the test; the close fit can reduce the loss and interference in the heat transfer process, making the test results closer to the true value; the close fit of the thermal insulation material can reduce the test error caused by the gap or misalignment between the materials, which helps to improve the reliability of the test and make the test results more stable and repeatable; the thermal insulation material is fixed by the extrusion plate 406 to ensure that the heat transfer between the materials is more efficient, which helps to reach a stable state faster during the test, thereby shortening the test time and improving the test efficiency. During the extrusion process, the positioning assembly rod 410 can be elastically telescopically moved in the storage slot 306 through the second spring 409. Such a setting can avoid the influence of the positioning assembly rod 410 on the extrusion during the extrusion.

[0027] After the initial cooperation between the positioning seat 405 and the test seat 407, the box cover 2 is placed on the test box body 1, and the air pump 301 is started. The air pump 301 can introduce the outside air into the air guide tube 302, and the air can be introduced into the elastic extrusion airbag 303 through the air guide tube 302. The elastic expansion of the elastic extrusion airbag 303 can elastically squeeze the extrusion plate 406 inside the assembly groove 404, so that the extrusion plate 406 can elastically squeeze the thermal insulation material. After the thermal insulation material is elastically squeezed, the gaps and bubbles inside the thermal insulation material will be compressed, making the material more compact, which helps to reduce the thermal bridge effect and heat loss inside the material, thereby improving the accuracy of the test. By ensuring the material Good contact with the hot wire sensor 803 can reduce errors in the test process and make the test results more reliable. During the test, the thermal insulation material may be deformed due to temperature changes or external forces. The extrusion effect of the elastic extrusion airbag 303 can maintain the stability of the material to prevent it from affecting the test results due to deformation. This stability is crucial for accurately measuring the thermal conductivity of the material. Different thermal insulation materials have different physical properties and structural characteristics. By adjusting the expansion degree of the elastic extrusion airbag 303 and the pressure of the extrusion plate 406, it can adapt to the testing requirements of different materials. This flexibility enables the hot wire method test to be widely used in thermal conductivity tests of various thermal insulation materials.

[0028] When the elastic extrusion airbag 303 is elastically expanded, the expanded elastic extrusion airbag 303 will first squeeze the middle position of the extrusion plate 406, and at the same time, through the continuous elastic expansion of the elastic extrusion airbag 303, the elastic extrusion airbag 303 can squeeze the top plates 304 on both sides, so that the top plates 304 can move to the side away from the elastic extrusion airbag 303 under the action of the elastic extrusion airbag 303, and the movement of the top plate 304 can squeeze the first spring 305, so that the first spring 305 can be contracted into the contraction groove 408, so that the elastic extrusion airbag 303 can squeeze the plate 406. The extrusion of 6 expands from the middle to the left and right sides, so that the air at the contact point between the thermal insulation material and the hot-wire sensor 803 can be squeezed out from the middle position to the outside. The extrusion expands from the middle to the sides, which can ensure that the contact between the thermal insulation material and the hot-wire sensor 803 is closer and the air gap between the two is reduced. When the air is squeezed out from the middle position to the outside, the thermal bridge effect of the air between the thermal insulation material and the hot-wire sensor 803 is reduced, and the heat loss is reduced. By optimizing the extrusion method, the air can be discharged faster, so that the thermal insulation material and the hot-wire sensor 803 can reach a close contact state faster.

[0029] Specifically, Figures 2 to 3 As shown, a sealing and clamping assembly 5 is provided at the connection between the test box body 1 and the box cover 2, and the sealing and clamping assembly 5 includes an assembly slot 502 opened at the edge of the upper end surface of the test box body 1, and a clamping ring 503 matching the assembly slot 502 is fixedly installed at the edge of the lower end surface of the box cover 2. A sealing air guide tube 501 is embedded on the side wall of the assembly slot 502 close to the inside of the test box body 1, and the sealing air guide tube 501 is connected to the air guide tube 302. The sealing air guide tube 501 is fixedly connected to a connecting valve tube 6 on the tube wall close to the inside of the test box body 1, and the connecting valve tube 6 penetrates the inner wall of the test box body 1 and extends to the inside of the test box body 1, and the connecting valve tube 6 is arranged to be inclined downward.

[0030] By adopting the above technical scheme, when the box cover 2 is covered on the test box body 1, the clamping ring 503 will be inserted into the assembly clamping groove 502, so as to ensure the sealing of the connection between the box cover 2 and the test box body 1. When the air pump 301 is working, the air duct 302 and the sealed air duct 501 are connected to each other, so that the air in the air duct 302 can be introduced into the sealed air duct 501. At this time, through the expansion of the sealed air duct 501, the end face of the sealed air duct 501 and the end face of the clamping ring 503 can be made to fit each other, so that the tightness of the connection between the clamping ring 503 and the assembly clamping groove 502 can be further ensured, and the external air or heat can be effectively prevented from entering the test area through these gaps. Good sealing is the basis of the accuracy of the hot wire method test, and can avoid external factors from interfering with the test results. The enhancement of sealing helps to maintain the temperature and heat distribution in the test box 1 stable, reduce heat loss during the test, and the stable test environment can ensure that the heat transfer between the hot wire sensor 803 and the thermal insulation material is more accurate, thereby improving the accuracy of the test results.

[0031] When the test is finished, by connecting the sealed air duct 501 with the connecting valve tube 6, the gas inside the sealed air duct 501 can be sprayed into the test box 1 through the connecting valve tube 6. By spraying a large amount of gas into the test box 1, the hot air generated inside the test box 1 during the test can be squeezed, thereby realizing the exchange of the air inside the test box 1. By quickly exchanging the air inside the test box 1, the environment inside the test box 1 can be kept at room temperature, so that the next performance test experiment can be carried out quickly and conveniently; by quickly exchanging the air inside the test box 1, the preparation time between tests can be shortened, making the test process more efficient, which helps to save test costs and time and improve test efficiency. The thermal conductivity test of thermal insulation materials is sensitive to ambient temperature. By quickly exchanging the air inside the test box 1, the stability and consistency of the test ambient temperature can be ensured, thereby improving the accuracy and reliability of the test.

[0032] Specifically, Figures 3 to 5 As shown, the test matching component 8 includes a second electric cylinder 801 fixedly mounted on the left inner wall of the test box 1, the telescopic end of the second electric cylinder 801 is fixedly connected to a loading frame 802, a hot wire sensor 803 is fixedly mounted on the right end of the loading frame 802, a cooling and cleaning component 7 is arranged on the left side of the interior of the test box 1 and located above the test matching component 8, the cooling and cleaning component 7 includes an air supply pipe 701 embedded in the left inner wall of the test box 1, the output end of the air supply pipe 701 is fixedly connected to a control valve pipe 702, a connecting pipe 703 is fixedly mounted on the right end of the control valve pipe 702, and an air injection hole 704 corresponding to the hot wire sensor 803 is opened on the pipe wall of the connecting pipe 703.

[0033] By adopting the above technical solution, after the thermal insulation material is placed on the test seat 407, the second electric cylinder 801 is started. The operation of the second electric cylinder 801 can drive the loading frame 802 to extend and retract, and the loading frame 802 can drive the hot wire sensor 803 to move and retract. When the thermal conductivity coefficient is tested, the hot wire sensor 803 is pushed to the middle position of the thermal insulation material to ensure the accuracy of the position placement during the thermal conductivity coefficient test. After the test, the second electric cylinder 801 can drive the loading frame 802 to retract, so that the hot wire sensor 803 returns to the initial position; when the hot wire sensor 803 returns to the initial position, the control valve pipe 702 is opened. The gas supply pipe 701 and the sealed gas guide pipe 501 are interconnected, so that the gas inside the gas supply pipe 701 can be transported to the connecting pipe 703 through the control valve pipe 702, and the gas can be sprayed onto the corresponding hot wire sensor 803 through the jet hole 704 on the connecting pipe 703. The hot wire sensor 803 may cause measurement errors due to heat accumulation or pollution after working for a long time; the gas sprayed from the jet hole 704 can quickly cool down the hot wire sensor 803, which can eliminate the error caused by heat accumulation; at the same time, the cleaning process can remove pollutants on the surface of the sensor, ensure the cleanliness of the sensor surface, and thus improve the precision and accuracy of the test.

[0034] Working principle: The thermal insulation material performance testing device also includes a power supply, a control unit, a data acquisition and processing system, etc. The power supply and control unit provide a constant current or voltage for the hot wire and control the measurement process; the data acquisition and processing system collects the signal of the hot wire probe and calculates the thermal conductivity of the material. The above is a prior art solution and will not be described in detail here. When in use, first open the box cover 2 by the handle, so that the thermal insulation material to be tested can be conveniently placed in the test box 1 for testing. First of all, the sample uniformity of the thermal insulation material itself must be ensured. Before the test, two identical thermal insulation material samples should be fully processed and prepared. When performing thermal conductivity performance testing, one of the thermal insulation materials is placed on the test seat 407, and the positioning holes on the thermal insulation material are aligned with the positioning assembly rods 410 on the test seat 407. The thermal insulation material is placed on the test seat 407, and the second electric cylinder 801 is started. The second electric cylinder 801 can drive the loading frame 802 to extend and retract, and the loading frame 802 can drive the hot wire sensor 803 to move. When conducting a thermal conductivity test, the hot wire sensor 803 is pushed to the middle position of the thermal insulation material to ensure the accuracy of the position placement during the thermal conductivity test. After one of the thermal insulation materials is placed on the test seat 407, the other thermal insulation material is placed on the positioning seat 405, and the positioning holes opened on the thermal insulation material are aligned with the positioning assembly rod 410 on the positioning seat 405. In this way, the thermal insulation material can be placed on the positioning seat 405. When both thermal insulation materials are placed, the carrier is started. The first electric cylinder 402 on 401 and the supporting frame 401 can provide stable support for the first electric cylinder 402. The first electric cylinder 402 can push the positioning seat 405 to move downward when working, so that the extrusion plate 406 on the lower end surface of the positioning seat 405 can extrude the thermal insulation material placed on the test seat 407. During the extrusion process, the positioning assembly rod 410 can be elastically telescopically moved in the contraction groove 408 through the second spring 409. Such a configuration can avoid the positioning assembly rod 410 from affecting the extrusion during extrusion.

[0035] After the positioning seat 405 and the test seat 407 are initially matched and squeezed, the box cover 2 is covered on the test box body 1. When the box cover 2 is covered on the test box body 1, the clamp ring 503 will be clamped into the assembly clamping groove 502 to ensure the sealing of the connection between the box cover 2 and the test box body 1. The air pump 301 is started. The air pump 301 can introduce the outside air into the air guide pipe 302. The air guide pipe 302 and the sealed air guide pipe 501 are connected to each other, so that the air in the air guide pipe 302 can be The air is introduced into the sealed air guide tube 501. At this time, the end surface of the sealed air guide tube 501 and the end surface of the clamp ring 503 can be fitted together through the expansion of the sealed air guide tube 501, so that the tightness of the connection between the clamp ring 503 and the assembly slot 502 can be further ensured; the air can be introduced into the elastic extrusion airbag 303 through the air guide tube 302, and the elastic expansion of the elastic extrusion airbag 303 can elastically squeeze the extrusion plate 406 inside the assembly slot 404, so that The extrusion plate 406 can elastically extrude the thermal insulation material; when the elastic extrusion airbag 303 is elastically expanding, the expanded elastic extrusion airbag 303 will first squeeze the middle position of the extrusion plate 406, and at the same time, through the continuous elastic expansion of the elastic extrusion airbag 303, the elastic extrusion airbag 303 can squeeze the top plates 304 on both sides, so that the top plate 304 can move to the side away from the elastic extrusion airbag 303 under the action of the elastic extrusion airbag 303, and the first spring 305 can be squeezed through the movement of the top plate 304, so that the first spring 305 can shrink into the shrinkage groove 408, and the extrusion of the extrusion plate 406 by the elastic extrusion airbag 303 can expand from the middle to the left and right sides, so that the air at the contact point between the thermal insulation material and the hot wire sensor 803 can be squeezed out from the middle position to the outside, and the extrusion expands from the middle to both sides, which can ensure that the contact between the thermal insulation material and the hot wire sensor 803 is closer.

[0036] After the extrusion is fixed, the power supply and control unit provide a constant current or voltage to the hot wire sensor 803 and control the measurement process; the data acquisition and processing system collects the signal of the hot wire probe and calculates the thermal conductivity of the material, thereby completing the thermal conductivity test of the thermal insulation material; when the thermal conductivity test is completed, the air pump 301 is turned off, and the first electric cylinder 402 can work to separate the positioning seat 405, the extrusion plate 406 and the test seat 407, thereby separating the thermal insulation material. At this time, the second electric cylinder 801 can drive the loading rack 802 to contract, so that the hot wire sensor 803 returns to the initial position, and the box cover 2 is opened by the handle, and the air pump 301 is started again. The air pump 301 supplies air to the sealed air duct 501. Through the connection between the sealed air duct 501 and the connecting valve pipe 6, the gas inside the sealed air duct 501 can be sprayed into the test box 1 through the connecting valve pipe 6. By spraying a large amount of gas into the test box 1, the test box 1 can be tested. The hot air generated during the test is squeezed, thereby realizing the exchange of the air inside the test box 1. Through the rapid exchange of the air inside the test box 1, the environment inside the test box 1 can be kept at room temperature, so that the next performance test experiment can be carried out quickly and conveniently. The control valve tube 702 is opened, and the air supply pipe 701 is connected with the sealed air guide pipe 501, so that the gas inside the air supply pipe 701 can be transported to the connecting pipe 703 through the control valve tube 702, and the gas can be sprayed onto the corresponding hot wire sensor 803 through the air injection hole 704 on the connecting pipe 703. The hot wire sensor 803 may cause measurement errors due to heat accumulation or pollution after working for a long time; the gas ejected from the air injection hole 704 quickly cools down the hot wire sensor 803, which can eliminate the error caused by heat accumulation; at the same time, the cleaning process can remove pollutants on the surface of the sensor, ensure the cleanliness of the sensor surface, and thus improve the precision and accuracy of the test.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A thermal insulation material performance testing device, comprising a test box (1), characterized in that: The upper end of the test box (1) is detachably mounted with a box cover (2); an extrusion guide assembly (4) is arranged inside the test box (1); the extrusion guide assembly (4) comprises a support frame (401) fixedly mounted on the rear side wall inside the test box (1); a first electric cylinder (402) is fixedly mounted on the upper end of the support frame (401); an extrusion seat (403) is fixedly mounted on the output end of the first electric cylinder (402) passing through the support frame (401); and a mounting groove (404) is provided on the lower end surface of the extrusion seat (403); An elastic extrusion assembly (3) is disposed on the inside and outside of the test box (1), the elastic extrusion assembly (3) comprising an elastic extrusion airbag (303) movably mounted inside an assembly groove (404), storage grooves (306) corresponding to the elastic extrusion airbag (303) are provided on the left and right side walls inside the extrusion seat (403), a first spring (305) is fixedly mounted inside the storage groove (306), and one end of the first spring (305) away from the storage groove (306) is fixedly connected to a top plate (304).

2. A thermal insulation material performance testing device according to claim 1, characterized in that: The elastic extrusion assembly (3) further comprises an air pump (301) fixedly mounted on the right side wall of the test box (1); the output end of the air pump (301) is fixedly connected to an air guide tube (302); the air guide tube (302) is embedded in the inner wall of the test box (1) and the end thereof is connected to the elastic extrusion airbag (303).

3. A thermal insulation material performance testing device according to claim 1, characterized in that: The extrusion guide assembly (4) comprises an extrusion plate (406) slidably mounted at the lower end of the assembly groove (404), and positioning seats (405) are fixedly mounted on both left and right ends of the upper end surface of the extrusion plate (406).

4. A thermal insulation material performance testing device according to claim 3, characterized in that: A test seat (407) is fixedly installed in the middle position inside the test box (1), and four corners of the upper end surface of the test seat (407) and four corners of the lower end surface of the extrusion seat (403) are provided with contraction grooves (408), and a second spring (409) is movably installed inside the contraction groove (408), and one end of the second spring (409) away from the contraction groove (408) is fixedly connected to a positioning assembly rod (410).

5. A thermal insulation material performance testing device according to claim 1, characterized in that: A sealing and clamping assembly (5) is provided at the connection between the test box body (1) and the box cover (2), the sealing and clamping assembly (5) comprising an assembly slot (502) provided at the edge of the upper end surface of the test box body (1), and a clamping ring (503) matching the assembly slot (502) is fixedly mounted at the edge of the lower end surface of the box cover (2).

6. A thermal insulation material performance testing device according to claim 5, characterized in that: A sealed air guide tube (501) is embedded on the side wall of the assembly slot (502) close to the inside of the test box (1), and the sealed air guide tube (501) and the air guide tube (302) are in communication with each other.

7. A thermal insulation material performance testing device according to claim 6, characterized in that: A connecting valve pipe (6) is fixedly connected to the pipe wall of the sealed air guide pipe (501) close to the interior of the test box (1); the connecting valve pipe (6) penetrates the inner wall of the test box (1) and extends into the interior of the test box (1); the connecting valve pipe (6) is arranged to be inclined downward.

8. A thermal insulation material performance testing device according to claim 1, characterized in that: A test matching assembly (8) is arranged on the left side inside the test box (1), and the test matching assembly (8) comprises a second electric cylinder (801) fixedly mounted on the left inner wall of the test box (1), a telescopic end of the second electric cylinder (801) is fixedly connected to a loading frame (802), and a hot wire sensor (803) is fixedly mounted on the right end of the loading frame (802).

9. A thermal insulation material performance testing device according to claim 8, characterized in that: A cooling and cleaning component (7) is arranged on the left side inside the test box (1) and above the test matching component (8); the cooling and cleaning component (7) comprises an air supply pipe (701) embedded in the left inner wall of the test box (1); the output end of the air supply pipe (701) is fixedly connected to a control valve pipe (702).

10. A thermal insulation material performance testing device according to claim 9, characterized in that: A connecting pipe (703) is fixedly mounted on the right end of the control valve pipe (702), and a jet hole (704) corresponding to the hot wire sensor (803) is opened on the pipe wall of the connecting pipe (703).

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