Production auxiliary equipment and testing methods for testing the strength of heat insulation boards

Abstract

This invention discloses a production auxiliary device and testing method for testing the strength of heat insulation boards. The production auxiliary device includes a conveying mechanism, a pressure sensor, and a controller. The conveying mechanism is used to transport sample heat insulation boards. The pressure sensor is used to collect pressure signals from the sample heat insulation boards in real time and transmit the pressure signals to the controller. The controller is used to receive the pressure signals collected by the pressure sensor and is electrically connected to the start / stop control unit of the conveying mechanism. When the pressure signal received by the controller changes, it issues a command to shut down the conveying mechanism. The production auxiliary device of this invention can obtain the fracture length of the sample heat insulation board. Based on the obtained fracture length, the sample's self-weight resistance strength can be calculated. Furthermore, based on the obtained fracture length and the difference between the location of the maximum bending moment generated by the heat insulation board during actual production and that of the production auxiliary device, the maximum allowable length of the heat insulation board during actual production can be determined, thereby obtaining the relationship between density, maximum allowable length, and maximum strength.

Description

Technical Field

[0001] This invention relates to the field of thermal insulation board production technology, and specifically to a production auxiliary device and testing method for testing the strength of thermal insulation boards. Background Technology

[0002] The nano-insulation board is made of low thermal conductivity nanoparticles as the main body, with added reinforcing fibers and infrared light-blocking agents mixed into a dry powder and molded.

[0003] During mass production in the workshop, the strength of the produced sheets needs to be greater than the strength required to overcome their own weight. Low sheet strength can lead to cracking and breakage during demolding and handling. Higher molding density results in greater strength, but it can also affect thermal insulation performance, so it is necessary to choose an appropriate molding density.

[0004] Therefore, if the relationship between the density, size, and strength of nano-insulation boards can be obtained, the required size and density for the production of nano-insulation boards can be determined. During the production process, the density of nano-insulation boards can be controlled within a reasonable range to ensure that the strength of nano-insulation boards is not too high or too low. Within a suitable range, the insulation performance can be guaranteed without causing problems such as cracking or breakage.

[0005] Currently, there is no relevant technology for studying how to obtain the relationship between the density, size, and strength of nano-insulation panels. Therefore, it is necessary to design a new technology for obtaining the relationship between the density, size, and strength of nano-insulation panels. Summary of the Invention

[0006] The purpose of this invention is to provide a production auxiliary device for testing the strength of a heat insulation board. This production auxiliary device can obtain the fracture length of a sample heat insulation board. Based on the obtained fracture length, the self-weight strength of the sample can be calculated. Furthermore, based on the obtained fracture length and the difference between the location of the maximum bending moment generated by the heat insulation board during actual production and that of the production auxiliary device, the maximum allowable length of the heat insulation board during actual production can be determined, thereby obtaining the relationship between density, maximum allowable length, and maximum strength.

[0007] In addition, the present invention also provides a testing method based on the above-mentioned production auxiliary device.

[0008] This invention is achieved through the following technical solution:

[0009] Production auxiliary equipment for testing the strength of insulation panels includes a conveying mechanism, a pressure sensor, and a controller;

[0010] The conveying mechanism is used to transport the sample heat insulation plate, and the sample heat insulation plate can undergo relative displacement with the conveying mechanism under the transmission action of the conveying mechanism;

[0011] The pressure sensor is used to acquire the pressure signal of the sample heat insulation plate in real time and transmit the pressure signal to the controller;

[0012] The controller is used to receive pressure signals collected by the pressure sensor and is electrically connected to the start / stop control unit of the conveying mechanism. When the pressure signal received by the controller changes, it issues a command to shut down the conveying mechanism.

[0013] The conveying mechanism, pressure sensor, and controller described in this invention all employ existing technologies. The conveying mechanism is used to transfer the sample heat insulation plate until its front end is suspended in mid-air. When the front end of the sample heat insulation plate reaches a certain length in mid-air, the sample heat insulation plate breaks. The conveying speed and transmission time (the interval between the start and stop times of the conveying mechanism) are both obtainable during operation. The controller can determine whether the sample heat insulation plate has broken based on changes in the pressure signal. When the sample heat insulation plate breaks, the pressure signal will change abruptly.

[0014] The production auxiliary device of this invention can determine whether the sample heat insulation plate has broken based on the pressure signal, and stop the conveying mechanism when the sample heat insulation plate breaks. It obtains the conveying speed and time of the conveying mechanism and can directly calculate the fracture length. Therefore, the fracture point of the sample heat insulation plate in the production auxiliary device of this invention is the end of the conveying mechanism (referring to the end in the reverse direction of transmission, for example, attached). Figure 1 In the middle, the conveying mechanism transmits from left to right, so the rightmost end is the end of the conveying mechanism, that is, the air length of the sample heat insulation plate is equal to the transmission distance of the conveying mechanism.

[0015] Therefore, the production auxiliary device described in the invention can accurately obtain the fracture length of the sample insulation board. Based on the obtained fracture length, the sample's self-weight resistance strength can be calculated. Furthermore, based on the obtained fracture length, combined with the difference between the location of the maximum bending moment generated by the production auxiliary device and the actual production of the insulation board, the maximum allowable length of the insulation board during actual production can be determined, thereby obtaining the relationship between density, maximum allowable length, and strength.

[0016] Furthermore, it also includes a fracture length calculation module, a velocity acquisition module, and a timer;

[0017] The speed acquisition module is used to collect the transmission speed of the conveying mechanism and transmit the transmission speed to the fracture length calculation module;

[0018] The timer is used to collect the transmission time of the conveying mechanism and transmit the transmission time to the fracture length calculation module;

[0019] The fracture length calculation module is used to calculate the fracture length x of the sample heat insulation plate based on the transmission speed and transmission time of the conveying mechanism. The fracture length x is equal to the product of the transmission speed and the transmission time.

[0020] Furthermore, it also includes storage units and a strength calculation module;

[0021] The storage unit is used to store the maximum strength calculation data, which includes the fracture length x, the stress point coordinates y of the sample heat insulation plate, the moment of inertia Iz, the length l, the width w, the thickness h, the density ρ, and the gravity coefficient g.

[0022] The strength calculation module is used to obtain the maximum strength calculation data of the storage unit and calculate the maximum strength σ1 of the sample heat insulation plate based on the maximum strength calculation model.

[0023] The maximum intensity calculation model is shown below:

[0024] σ1=M max ·y / I z

[0025] In the formula, σ1 is the maximum strength, with units of Pa and M. max The maximum bending moment is calculated using the following formula: qx 2 / 2, q is the uniform load, q is taken as ρlwh·g / l, ρ is the core material density, the bending moment is in N·m, g is the gravity coefficient, the unit is N / kg; l is the length of the sample insulation board, the unit is mm, w is the width of the sample insulation board, the unit is mm, h is the thickness of the sample insulation board, the unit is mm; y is the stress point coordinate, taken as h / 2; Iz is the moment of inertia, rectangular, taken as wh 3 / 12.

[0026] Furthermore, it also includes a maximum allowable length calculation module, which obtains the fracture length x and calculates the maximum allowable length L based on the fracture length x.

[0027] The formulas for calculating the fracture length x and the maximum allowable length L are derived by considering the difference in the location of the maximum bending moment generated by the insulation board during production auxiliary equipment and actual production:

[0028] x = 0.5L

[0029] like Figure 3 As shown, the sample heat insulation plate on the production auxiliary device of the present invention can be regarded as a cantilever beam, and the maximum bending moment qx is at point D. 2 / 2; however, in actual production of insulation boards, such as Figure 4 As shown, the insulation board can be considered as a simply supported beam, with the maximum bending moment qL at the midpoint l / 2 of AB. 2 / 8, based on the maximum strength σ1, let qx 2 / 2 equals qL 2 / 8, and we get x = 0.5L.

[0030] Furthermore, it also includes a display unit, which is used to display the relationship between the maximum intensity σ1 and the corresponding density ρ and maximum allowable length L.

[0031] Furthermore, a pressure sensor is positioned above the end of the conveying mechanism.

[0032] Furthermore, a baffle is provided at the bottom of the pressure sensor.

[0033] Furthermore, the conveying mechanism is a conveyor belt.

[0034] The testing method based on production auxiliary equipment includes the following steps:

[0035] S1. Prepare the sample heat insulation plate and determine the size and density ρ of the sample heat insulation plate, including the length l, width w and thickness h;

[0036] S2. Place the sample insulation plate on the conveying mechanism, aligning the front end of the sample insulation plate with the end of the conveying mechanism.

[0037] S3. The controller starts the conveying mechanism, which moves the sample heat insulation plate in the conveying direction of the conveying mechanism. The pressure sensor senses the pressure signal in real time and transmits the pressure signal to the controller. When the front end of the sample heat insulation plate reaches a certain length x in the air, the sample heat insulation plate breaks and falls at the end of the conveying mechanism. The control drives the conveying mechanism to stop and records the conveying speed and transmission time of the conveying mechanism.

[0038] S4. Based on the transmission speed and transmission time obtained in step S3, calculate the fracture length x of the sample heat insulation plate;

[0039] S5. Based on the length l, width w, thickness h and density ρ obtained in step S1, and the fracture length x obtained in step S4, the maximum strength σ1 is calculated.

[0040] S6. Based on the fracture length x obtained in step S4; combined with the maximum bending moment M generated by the insulation board during actual production using the production auxiliary equipment; max The positional differences determine the maximum allowable length L of the insulation board during actual production;

[0041] S7. Determine the correspondence between the maximum allowable length L, density ρ, and maximum strength σ1.

[0042] Furthermore, in step S1, multiple samples of the heat insulation board with each standard formula, standard density, and standard thickness are prepared, and the test results are averaged.

[0043] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0044] 1. The production auxiliary device described in the invention can accurately obtain the fracture length of the sample heat insulation board. Based on the obtained fracture length, the sample's self-weight resistance strength can be calculated. Furthermore, based on the obtained fracture length, combined with the difference between the location of the maximum bending moment generated by the heat insulation board during actual production and that of the production auxiliary device, the maximum allowable length of the heat insulation board during actual production can be determined. This allows for the determination of the relationship between density, maximum allowable length, and maximum strength, which can be used to assist production, reduce the cost of pre-production trial production, and improve production efficiency.

[0045] 2. This invention can statistically obtain a database of the minimum molding density required for different sizes of boards under different formulations, which can reduce trial production costs and improve production efficiency in later production.

[0046] 3. By setting a baffle at the bottom of the pressure sensor, the present invention can prevent the sample heat insulation plate placed on the conveying mechanism from tilting up when the front end is too long in the air.

[0047] 4. The production auxiliary device described in this invention is not only simple in structure, but also capable of automated control and data calculation, and has the advantage of being easy to operate. Attached Figure Description

[0048] The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and form part of this application, do not constitute a limitation thereof. In the drawings:

[0049] Figure 1 This is a schematic diagram of the production auxiliary device of the present invention;

[0050] Figure 2 This is a schematic diagram of the production auxiliary device of the present invention when the heat insulation plate breaks;

[0051] Figure 3 This is a schematic diagram showing the heat insulation plate in the production auxiliary device of the present invention as a cantilever beam;

[0052] Figure 4 This is a schematic diagram showing the insulation board being treated as a simply supported beam during the production process.

[0053] Figure 5 This is a logic block diagram of the present invention.

[0054] The attached diagram shows the markings and corresponding component names:

[0055] 1-Pressure sensor, 2-Baffle, 3-Sample heat insulation plate, 4-Transfer mechanism. Detailed Implementation

[0056] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of the present invention are only used to explain the present invention and are not intended to limit the present invention.

[0057] Example 1:

[0058] like Figure 1 , Figure 2 As shown, the production auxiliary device for testing the strength of the insulation board includes a conveying mechanism 4, a pressure sensor 1, and a controller.

[0059] The conveying mechanism 4 is used to convey the sample heat insulation plate 3. The sample heat insulation plate 3 can be relatively displaced with the conveying mechanism 4 under the conveying action of the conveying mechanism 4. The conveying mechanism 4 is used to convey the sample heat insulation plate 3 on it to the point that the front end of the sample heat insulation plate 3 is in a state of being suspended in the air. When the front end of the sample heat insulation plate is suspended in the air for a certain length, the sample heat insulation plate breaks.

[0060] The pressure sensor 1 is used to collect the pressure signal of the sample heat insulation plate 3 in real time and transmit the pressure signal to the controller;

[0061] The controller is used to receive the pressure signal collected by the pressure sensor 1 and is electrically connected to the start / stop control unit of the transmission mechanism 4. When the pressure signal received by the controller changes, it issues a command to shut down the transmission mechanism 4.

[0062] In this embodiment, the pressure sensor 1 is disposed above the end of the conveying mechanism 4; a baffle 2 is disposed at the bottom of the pressure sensor 1; and the conveying mechanism 4 is a conveyor belt.

[0063] In this embodiment, the front end of the sample heat insulation plate 3 is considered to be in mid-air relative to the movement of the sample heat insulation plate 3, such as... Figure 1 The right end of the middle, the end of the transmission mechanism 4 also refers to Figure 1 , Figure 2 The right end of the middle.

[0064] The production auxiliary device described in this embodiment can obtain the transmission speed and transmission time of the conveying mechanism 4. Based on the transmission speed and transmission time, the fracture length x of the sample insulation board 3 can be directly calculated. Based on the obtained fracture length x, the sample's self-weight resistance strength, i.e., the maximum strength σ1, can be calculated. Furthermore, based on the obtained fracture length x, combined with the difference between the location of the maximum bending moment generated by the insulation board during actual production and that of the production auxiliary device, the maximum allowable length L of the insulation board during actual production can be determined. Thus, the relationship between density ρ, maximum allowable length L, and maximum strength σ1 can be obtained. The specific process is as follows:

[0065] S1. Prepare sample heat insulation board 3 and determine the size and density ρ of sample heat insulation board 3. The size includes length l, width w and thickness h. The sample heat insulation board 3 is cut according to the standard size of 100mm*600mm. Multiple samples are prepared for each standard formula, standard density and standard thickness of sample heat insulation board, and the test results are taken as the average value.

[0066] S2. Place the sample heat insulation plate 3 on the conveying mechanism 4, aligning the front end of the sample heat insulation plate 3 with the end of the conveying mechanism 4.

[0067] S3. The controller starts the conveying mechanism 4, so that the sample heat insulation plate 3 moves in the conveying direction of the conveying mechanism 4. The pressure sensor 1 senses the pressure signal in real time and transmits the pressure signal to the controller. When the front end of the sample heat insulation plate 3 is suspended in the air to a certain length x, the sample heat insulation plate 3 breaks and falls at the end of the conveying mechanism 4. The control drives the conveying mechanism 4 to stop and records the conveying speed and conveying time of the conveying mechanism 4.

[0068] S4. Based on the transmission speed and transmission time obtained in step S3, calculate the fracture length x of the sample heat insulation plate 3, where the fracture length x is equal to the product of the transmission speed and the transmission time.

[0069] S5. Based on the length l, width w, thickness h and density ρ obtained in step S1, and the fracture length x obtained in step S4, the maximum strength σ1 is calculated.

[0070] The maximum intensity calculation model is shown below:

[0071] σ1=M max ·y / I z

[0072] In the formula, σ1 is the maximum strength, with units of Pa and M. max The maximum bending moment is calculated using the following formula: qx 2 / 2, q is the uniform load, q is taken as ρlwh·g / l, ρ is the core material density, the bending moment is in N·m, g is the gravity coefficient, the unit is N / kg; l is the length of the sample insulation board, the unit is mm, w is the width of the sample insulation board, the unit is mm, h is the thickness of the sample insulation board, the unit is mm; y is the stress point coordinate, taken as h / 2; Iz is the moment of inertia, rectangular, taken as wh 3 / 12

[0073] S6. Based on the fracture length x obtained in step S4; combined with the maximum bending moment M generated by the insulation board during actual production using the production auxiliary equipment; max The positional differences determine the maximum allowable length L of the insulation board during actual production;

[0074] S7. Determine the correspondence between the maximum allowable length L, density ρ, and maximum strength σ1.

[0075] In this embodiment, the load q and thickness h are obtained by weighing and measuring the thickness of standard plates (600mm*100mm) with different formulations. The sample heat insulation plate 3 is conveyed at a constant speed on the conveyor belt. When the front end of the sample heat insulation plate 3 reaches a certain length x in the air, it will break and fall at the end of the conveyor belt. The pressure value of the pressure sensor 1 will change abruptly, and the conveyor belt will stop. q, h, and x are substituted into the maximum strength calculation model to calculate the maximum strength σ1; and the maximum strength σ1 is calculated based on the fracture length x. Figure 4 The maximum allowable length L of a simply supported beam can be taken as x = 0.5L. The load q is related to the density ρ. Ultimately, the ρ, h, and L data can be collected and a parameter table edited. Under a given formula, the minimum molding density can be determined based on the actual production dimensions of L and h.

[0076] Example 2:

[0077] like Figure 1 , Figure 2 , Figure 5 As shown, this embodiment is based on embodiment 1 and also includes a fracture length calculation module, a velocity acquisition module, and a timer;

[0078] The speed acquisition module is used to collect the transmission speed of the conveying mechanism 4 and transmit the transmission speed to the fracture length calculation module;

[0079] The timer is used to collect the transmission time of the conveying mechanism 4 and transmit the transmission time to the fracture length calculation module;

[0080] The fracture length calculation module is used to calculate the fracture length x of the sample heat insulation plate 3 based on the transmission speed and transmission time of the transmission mechanism 4.

[0081] It also includes storage units and a strength calculation module;

[0082] The storage unit is used to store the maximum strength calculation data, which includes the fracture length x, the stress point coordinates y of the sample heat insulation plate 3, the moment of inertia Iz, the length l, the width w, the thickness h, the density ρ, and the gravity coefficient g.

[0083] The strength calculation module is used to obtain the maximum strength calculation data of the storage unit and calculate the maximum strength σ1 of the sample heat insulation plate 3 based on the maximum strength calculation model.

[0084] It also includes a maximum allowable length calculation module, which obtains the fracture length x and calculates the maximum allowable length L based on the fracture length x;

[0085] It also includes a display unit, which is used to display the relationship between the maximum intensity σ1 and the corresponding density ρ and maximum allowable length L. The display unit may be a display screen.

[0086] In this embodiment, by setting up a fracture length calculation module, a strength calculation module, and a maximum allowable length calculation module, the automatic acquisition and calculation of data from the production auxiliary device can be achieved.

[0087] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

[0088] It should be noted that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of the invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of the invention, should still fall within the scope of the disclosed technical content. Furthermore, terms such as "upper," "lower," "left," "right," and "middle" used in this specification are merely for clarity and not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention.

Claims

1. A production auxiliary device for testing the strength of heat insulation boards, characterized in that, It includes a conveying mechanism (4), a pressure sensor (1), and a controller; The conveying mechanism (4) is used to convey the sample heat insulation plate (3), and the sample heat insulation plate (3) can be relatively displaced with the conveying mechanism (4) under the transmission action of the conveying mechanism (4). The pressure sensor (1) is used to collect the pressure signal of the sample heat insulation plate (3) in real time and transmit the pressure signal to the controller; The controller is used to receive the pressure signal collected by the pressure sensor (1) and is electrically connected to the start / stop control unit of the transmission mechanism (4). When the pressure signal received by the controller changes, it issues a command to shut down the transmission mechanism (4). It also includes a fracture length calculation module, a velocity acquisition module, and a timer; The speed acquisition module is used to collect the transmission speed of the conveying mechanism (4) and transmit the transmission speed to the fracture length calculation module; The timer is used to collect the transmission time of the transmission mechanism (4) and transmit the transmission time to the fracture length calculation module; The fracture length calculation module is used to calculate the fracture length x of the sample heat insulation plate (3) based on the transmission speed and transmission time of the transmission mechanism (4); It also includes storage units and a strength calculation module; The storage unit is used to store the maximum strength calculation data, which includes the fracture length x, the stress point coordinates y, moment of inertia Iz, length l, width w, thickness h, density ρ and gravity coefficient g of the sample heat insulation plate (3); The strength calculation module is used to obtain the maximum strength calculation data of the storage unit and calculate the maximum strength σ1 of the sample heat insulation plate (3) based on the maximum strength calculation model; It also includes a maximum allowable length calculation module, which obtains the fracture length x and calculates the maximum allowable length L based on the fracture length x.

2. The production auxiliary device for testing the strength of a heat insulation board according to claim 1, characterized in that, It also includes a display unit, which is used to display the relationship between the maximum intensity σ1 and the corresponding density ρ and maximum allowable length L.

3. The production auxiliary device for testing the strength of a heat insulation board according to any one of claims 1-2, characterized in that, The pressure sensor (1) is located above the end of the conveying mechanism (4).

4. The production auxiliary device for testing the strength of a heat insulation board according to claim 3, characterized in that, A baffle (2) is provided at the bottom of the pressure sensor (1).

5. The production auxiliary device for testing the strength of a heat insulation board according to any one of claims 1-2, characterized in that, The conveying mechanism (4) is a conveyor belt.

6. A test method based on the production auxiliary device according to any one of claims 1-5, characterized in that, Includes the following steps: S1. Prepare the sample heat insulation plate (3) and determine the size and density ρ of the sample heat insulation plate (3). The size includes the length l, width w and thickness h. S2. Place the sample heat insulation plate (3) on the conveying mechanism (4) so ​​that the front end of the sample heat insulation plate (3) is aligned with the end of the conveying mechanism (4). S3. Start the conveying mechanism (4) through the controller to move the sample heat insulation plate (3) in the direction of the conveying mechanism (4). The pressure sensor (1) senses the pressure signal in real time and transmits the pressure signal to the controller. When the front end of the sample heat insulation plate (3) is suspended in the air to a certain length x, the sample heat insulation plate (3) breaks and falls at the end of the conveying mechanism (4). The control drives the conveying mechanism (4) to stop. Record the transmission speed and transmission time of the conveying mechanism (4). S4. Based on the transmission speed and transmission time obtained in step S3, calculate the fracture length x of the sample heat insulation plate (3); S5. Based on the length l, width w, thickness h and density ρ obtained in step S1, and the fracture length x obtained in step S4, the maximum strength σ1 is calculated. S6. Based on the fracture length x obtained in step S4, determine the maximum allowable length L of the insulation board during actual production by combining the location difference between the production auxiliary device and the location of the insulation board generating the maximum bending moment Mmax during actual production. S7. Determine the correspondence between the maximum allowable length L, density ρ, and maximum strength σ1.

7. The test method according to claim 6, characterized in that, In step S1, multiple samples of each standard formula, standard density, and standard thickness heat insulation board (3) are prepared, and the average value of the test results is taken.

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