Building material sound insulation performance teaching demonstration device

Abstract

The invention discloses a building material sound insulation performance teaching demonstration device which comprises a cabinet body, a partition plate is arranged in the cabinet body, a pressing plate capable of moving close to or away from the partition plate is movably arranged above the partition plate, a plurality of sound insulation cylinders are arranged below the partition plate, and loudspeakers are arranged in the sound insulation cylinders. A push-pull frame is arranged between the partition plate and the pressing plate, a supporting plate used for containing a to-be-detected material is arranged on the push-pull frame, a through hole allowing the sound insulation cylinder to penetrate through is formed in the supporting plate, the supporting plate is connected to the bottom of the push-pull frame through a metal elastic piece, and the supporting plate moves along with the pressing plate to be close to or away from the bottom of the push-pull frame. A sound sensor is arranged on the pressing plate, the sound sensor is located over the sound insulation cylinder, and display screens used for displaying data detected by the sound sensor are arranged on the two sides of the cabinet body. Compared with the prior art, the detection effect on the sound insulation performance of the to-be-detected material can be ensured, and the teaching demonstration effect is enhanced.

Description

Technical Field

[0001] The invention relates to the technical field of teaching tools, in particular to a teaching demonstration device for the sound insulation performance of building materials. Background Art

[0002] Currently, in the teaching demonstration process of the sound insulation performance of building materials, a key step is to test the sound insulation performance of building materials by manually pressing the building materials onto the detection device. However, this operation mode has significant limitations. First, the tightness of manual compression is difficult to control accurately. If sufficient pressure is not reached, the sound may escape through gaps or interfaces that are not completely closed, resulting in inaccurate detection of the sound insulation effect, which in turn affects the effectiveness of the teaching demonstration. Secondly, teachers need to use one hand to continuously press the building materials, which greatly limits their flexibility in teaching explanations, operational demonstrations, and interactions with students, reducing the overall teaching effect. Summary of the invention

[0003] In view of the problem that in the current teaching demonstration of sound insulation performance of building materials, the method of manually pressing the building materials on a detection device to detect the sound insulation performance cannot ensure that the building materials are always in close fit with the detection device, resulting in inaccurate detection of the sound insulation effect and poor teaching demonstration effect, the present invention proposes a teaching demonstration device for the sound insulation performance of building materials.

[0004] The technical solution of the present invention is to disclose a teaching and demonstration device for the sound insulation performance of building materials, comprising a cabinet, a partition is arranged inside the cabinet, a pressure plate is movably arranged above the partition and can move close to or away from the partition, a plurality of sound insulation tubes are arranged below the partition, and a loudspeaker is arranged inside the sound insulation tube; A push-pull frame is provided between the partition plate and the pressing plate, the push-pull frame is provided with a support plate for placing the material to be detected, the support plate is provided with a through hole for the sound insulation tube to pass through, the support plate is connected to the bottom of the push-pull frame through a metal spring sheet, the support plate moves closer to or away from the bottom of the push-pull frame as the pressing plate moves, so that the material to be detected abuts against or separates from the upper opening of the sound insulation tube, a sound sensor is provided on the pressing plate, and the sound sensor is located directly above the sound insulation tube, and display screens for displaying data detected by the sound sensor are provided on both sides of the cabinet; An air bag connected to an air pump is provided on the sound insulation tube, and a sleeve is provided on the bottom surface of the pressure plate. When the material to be detected abuts against the upper opening of the sound insulation tube, the air pump is started to inflate the air bag so that the material to be detected fits the inner wall of the sleeve and the upper opening of the sound insulation tube at the same time.

[0005] Furthermore, the two ends of the partition are respectively fixed on the inner walls on both sides of the cabinet, and the pressure plate is fixed to the partition through a plurality of guide columns, and a spring is provided on the guide column. A first handle is also provided on the upper surface of the pressure plate. Pulling the first handle can make the pressure plate move closer to or away from the partition along the setting direction of the guide column. A positioning block is also provided on the side of the pressure plate, and a buckle that can be engaged with or separated from the positioning block is provided on the cabinet.

[0006] Furthermore, drawer rails connected to the push-pull frame are arranged on both sides of the cabinet, and a second handle is arranged on the push-pull frame, and the push-pull frame can be pulled to enter or exit the cabinet along the setting direction of the drawer rails; Follower wheels are also arranged on both sides of the push-pull frame, and a wedge block cooperating with the follower wheel is arranged on the bottom surface of the pressure plate. When the push-pull frame is located inside the cabinet, the wedge block moves with the pressure plate to abut against or separate from the follower wheel.

[0007] Furthermore, connecting rods are arranged on both sides of the push-pull frame, and a rotating shaft is arranged at one end of the push-pull frame away from the second handle, and the rotating shaft is rotatably arranged between the two connecting rods.

[0008] Furthermore, the push-pull frame is provided with a first magnet on the left and right sides near one end of the second handle, the connecting rod is provided with a second magnet that cooperates with the first magnet, and a stop block is also provided below the first magnet. The stop block abuts against or separates from the connecting rod as the push-pull frame moves axially along the rotating shaft.

[0009] Furthermore, one end of the sound insulation tube is fixed to the inner wall of the bottom of the cabinet, and the other end passes through the partition and is fixed to the partition; The airbag is arranged on the side wall of the sound insulation tube passing through one end of the partition, the air pump is located at the bottom of the partition, and the airbag is connected to the air pump through an air guide tube.

[0010] Furthermore, a photoelectric switch is arranged inside the cabinet, a controller is arranged outside the cabinet, and a sensing block cooperating with the photoelectric switch is arranged at the bottom of the pressing plate. When the sensing block moves with the pressing plate to the position of the photoelectric switch, the photoelectric switch is triggered, and the controller controls the air pump to start, so that the airbag is inflated; The airbag is also provided with an electromagnetic valve. When the induction block moves away from the position of the photoelectric switch along with the movement of the pressure plate, the controller controls the electromagnetic valve to open so that the gas inside the airbag is discharged.

[0011] Furthermore, rotating plates are arranged on both sides of the cabinet, the display screen is arranged on the rotating plates, one end of the rotating plates is connected to the cabinet via a hinge, and the other end of the rotating plates can be in contact with or separated from the cabinet.

[0012] Furthermore, sound insulation cotton is arranged around the outer wall of the sound insulation cylinder.

[0013] Furthermore, a base is arranged below the cabinet, a rotating table is rotatably arranged on the base, and the cabinet is fixed to the rotating table and can rotate on the base along with the rotating table.

[0014] Compared with the prior art, the present invention can press the material to be tested against the sound insulation tube as the pressure plate moves, thereby ensuring the detection effect; the rotatable cabinet combined with the push-pull frame can display the design of the material to be tested, and cooperate with the display screens on both sides of the cabinet to enhance the effect of the teaching demonstration. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0017] Figure 2 It is a schematic diagram of the cabinet structure of the present invention.

[0018] Figure 3 It is a schematic diagram of the pressing plate structure of the present invention.

[0019] Figure 4 It is a schematic diagram of the air pump structure of the present invention.

[0020] Figure 5 It is a schematic diagram of the structure of the sound insulation tube of the present invention.

[0021] Figure 6 It is a schematic diagram of the structure of the pressure plate and the partition plate of the present invention.

[0022] Figure 7 It is a schematic diagram of the wedge block, the induction element and the photoelectric switch structure of the present invention.

[0023] Figure 8 It is a schematic diagram of the push-pull frame structure of the present invention.

[0024] Fig. 9 It is a schematic diagram of the base structure of the present invention.

[0025] Fig.10It is a schematic diagram of the demonstration state structure of the present invention.

[0026] Among them, the cabinet 1; the display screen 11; the buckle 12; the photoelectric switch 13; the rotating plate 14; the controller 15; the partition 2; the air pump 21; the guide column 22; the spring 23; the pressure plate 3; the sound sensor 31; the sleeve 32; the first handle 33; the wedge block 34; the induction block 35; the sound insulation tube 4; the speaker 41; the airbag 42; the sound insulation cotton 43; the push-pull frame 5; the support plate 51; the metal spring 52; the second handle 53; the follower wheel 54; the rotating shaft 55; the first magnet 56; the stop block 57; the connecting rod 58; the second magnet 581; the base 6; the rotating table 61; the material to be detected 7. DETAILED DESCRIPTION

[0027] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0028] Thus, a feature indicated in this specification will be used to illustrate one of the features of an embodiment of the present invention, rather than implying that each embodiment of the present invention must have the described feature. In addition, it should be noted that this specification describes many features. Although some features can be combined together to illustrate possible system designs, these features can also be used in other combinations that are not explicitly described. Thus, unless otherwise stated, the described combinations are not intended to be limiting.

[0029] In the description of the present application, the terms “first” and “second” are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0030] In the description of the present application, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0031] The principle and structure of the present invention are described in detail below with reference to the accompanying drawings and embodiments.

[0032] A teaching and demonstration device for sound insulation performance of building materials comprises a cabinet 1, a partition 2 is arranged inside the cabinet 1, a pressing plate 3 is movably arranged above the partition 2 and can move close to or away from the partition 2, a plurality of sound insulation tubes 4 are arranged below the partition 2, and a loudspeaker 41 is arranged inside the sound insulation tube 4; A push-pull frame 5 is provided between the partition 2 and the pressing plate 3, and a support plate 51 for placing the material to be detected 7 is provided on the push-pull frame 5, and a through hole for the sound insulation tube 4 to pass through is provided on the support plate 51, and the support plate 51 is connected to the bottom of the push-pull frame 5 through a metal spring sheet 52, and the support plate 51 moves closer to or away from the bottom of the push-pull frame 5 as the pressing plate 3 moves, so that the material to be detected 7 abuts against or separates from the upper opening of the sound insulation tube 4, and a sound sensor 31 is provided on the pressing plate 3, and the sound sensor 31 is located directly above the sound insulation tube 4, and display screens 11 for displaying data detected by the sound sensor 31 are provided on both sides of the cabinet 1; An airbag 42 connected to the air pump 21 is provided on the sound insulation tube 4, and a sleeve 32 is provided on the bottom surface of the pressure plate 3. When the material to be tested 7 abuts against the upper opening of the sound insulation tube 4, the air pump 21 is started to inflate the airbag 42, so that the material to be tested 7 fits the inner wall of the sleeve 32 and the upper opening of the sound insulation tube 4 at the same time.

[0033] Furthermore, the two ends of the partition 2 are respectively fixed on the inner walls on both sides of the cabinet 1, and the pressure plate 3 is fixed on the partition 2 through a plurality of guide columns 22. A spring 23 is provided on the guide column 22. A first handle 33 is also provided on the upper surface of the pressure plate 3. Pulling the first handle 33 can make the pressure plate 3 move closer to or away from the partition 2 along the setting direction of the guide column 22. A positioning block is also provided on the side of the pressure plate 3, and a buckle 12 that can be engaged with or separated from the positioning block is provided on the cabinet 1.

[0034] In a specific embodiment, Figures 1 to 8 As shown, a partition 2 is set in the middle section of the cabinet 1, and the two ends of the partition 2 are respectively fixed on the inner walls of the left and right sides of the cabinet 1 to ensure the stability of the partition 2. A pressing plate 3 is set above the partition 2, and the pressing plate 3 is movably mounted on the partition 2. In order to achieve the smooth movement of the pressing plate 3, the pressing plate 3 and the partition 2 are connected by a plurality of guide columns 22, and the pressing plate 3 can move on the guide columns 22. The design of the plurality of guide columns 22 provides a stable movement trajectory for the pressing plate 3 without tilting or shaking. A spring 23 is also set on the guide column 22, so that the pressing plate 3 can move linearly along the setting direction of the guide column 22 when subjected to external force, and can be restored to the initial position by the elastic force of the spring 23 after the external force is released. In addition, in order to improve the convenience of user operation, a positioning block is also set on the outside of the pressing plate 3, and a buckle 12 that can be engaged or separated with the positioning block is set on the cabinet 1. After the user presses the pressing plate 3 down to the desired position, the position of the pressing plate 3 can be fixed by engaging the buckle 12 with the positioning block; and when the user needs to reset the pressing plate 3, the buckle 12 can be simply separated from the positioning block. A first handle 33 is provided at the center of the upper surface of the pressing plate 3. This design allows the user to move the pressing plate 3 up and down to get closer to or away from the partition 2 by applying force to the first handle 33, which improves the user experience.

[0035] Inside the cabinet 1, two sound insulation tubes 4 are arranged in the area below the partition 2, and a speaker 41 is arranged inside each sound insulation tube 4. Each sound insulation tube 4 has an opening at one end facing the partition 2. This design ensures that the sound emitted by the speaker 41 can only be transmitted through the opening above the sound insulation tube 4, effectively reducing the diffusion of the sound, improving the focusing effect of the sound, and facilitating the subsequent detection of the sound.

[0036] In addition, a push-pull frame 5 is provided between the partition plate 2 and the pressing plate 3. A support plate 51 for placing the material to be detected 7 is provided on the push-pull frame 5. A through hole is provided on the support plate 51 for the sound insulation tube 4 to pass through. The support plate 51 is connected to the bottom of the push-pull frame 5 by a metal spring 52. This connection method gives the support plate 51 a certain elasticity and activity space, so that the support plate 51 can move up and down with the movement of the pressing plate 3, thereby driving the material to be detected 7 placed on the support plate 51 to approach or move away from the upper opening of the sound insulation tube 4. Specifically, when the metal spring 52 resets the support plate 51, the rise of the support plate 51 will drive the material to be detected 7 to separate from the sound insulation tube 4, preventing the material to be detected 7 from getting stuck on the sound insulation tube 4, so that the material to be detected 7 is always located above the support plate 51, which is convenient for taking out and putting in the material to be detected 7. A sound sensor 31 is provided on the pressing plate 3, and a sound sensor 31 is provided directly above each sound insulation tube 4, which is used to detect the sound level passing through the material to be tested 7, and the data detected by the sound sensor 31 is displayed on the display screens 11 on both sides of the cabinet 1. Different materials to be tested 7 can be placed on the two sound insulation tubes 4, but the sound emitted by each speaker 41 needs to be strictly consistent, so as to compare the sound insulation performance of different materials to be tested 7.

[0037] In order to further improve the detection accuracy of the sound insulation performance of the material to be tested 7, an air bag 42 connected to the air pump 21 is also provided on the side wall of the upper end of the sound insulation tube 4. When the pressing plate 3 moves downward, the sleeve 32 at the bottom of the pressing plate 3 makes the material to be tested 7 abut against the upper opening of the sound insulation tube 4, and the air pump 21 is immediately started to inflate the air bag 42 until the air bag 42 completely fills the gap between the material to be tested 7 and the side wall of the sound insulation tube 4, so that the material to be tested 7 is tightly fitted with the inner wall of the sleeve 32 and the upper opening of the sound insulation tube 4 at the same time. This design ensures that the sound of the speaker 41 in the sound insulation tube 4 is transmitted only through the material to be tested 7, preventing the sound from escaping from the gap and affecting the detection effect.

[0038] In actual use, when the user presses the pressing plate 3 downward through the first handle 33 and the pressing plate 3 moves toward the partition 2, the pressing plate 3 contacts the support plate 51, so that the material to be detected 7 moves toward the bottom of the push-pull frame 5 together with the support plate 51. In this process, the sound insulation tube 4 will pass through the through hole on the support plate 51 until it contacts the lower bottom surface of the material to be detected 7. And the sleeve 32 guides the material to be detected 7 to abut against the upper opening of the sound insulation tube 4 as the pressing plate 3 is pressed down. At this time, the air pump 21 starts to work and inflates the airbag 42, so that the material to be detected 7 is pressed against the upper opening of the sound insulation tube 4 by the sleeve 32. By engaging the buckle 12 on the cabinet 1 with the positioning block of the pressing plate 3, the position of the pressing plate 3 remains stable and will not be offset. During the detection process, the display screen 11 will display the volume of the sound emitted by the speaker 41 after passing through the material to be detected 7 in the form of decibel value. This data intuitively reflects the sound insulation performance of the material to be detected 7. Such a design makes the teaching demonstration vivid and specific, and is particularly suitable for practical training courses in schools. Students can intuitively feel the difference in sound insulation effects of different materials to be tested 7 (such as various building materials) by observing the data changes on the display screen 11, thereby deepening students' understanding of the sound insulation performance of various building materials.

[0039] Furthermore, drawer rails connected to the push-pull frame 5 are provided on both sides of the cabinet 1, and a second handle 53 is provided on the push-pull frame 5. Pulling the second handle 53 can make the push-pull frame 5 enter or exit the interior of the cabinet 1 along the setting direction of the drawer rails; Follower wheels 54 are also provided on both sides of the push-pull frame 5, and a wedge block 34 cooperating with the follower wheel 54 is provided on the bottom surface of the pressure plate 3. When the push-pull frame 5 is located inside the cabinet 1, the wedge block 34 moves with the pressure plate 3 and abuts against or separates from the follower wheel 54.

[0040] Furthermore, connecting rods 58 are provided on both sides of the push-pull frame 5 , and a rotating shaft 55 is provided at one end of the push-pull frame 5 away from the second handle 53 . The rotating shaft 55 is rotatably provided between the two connecting rods 58 .

[0041] Furthermore, a first magnet 56 is provided on the left and right sides of the push-pull frame 5 near one end of the second handle 53, a second magnet 581 cooperating with the first magnet 56 is provided on the connecting rod 58, and a stop block 57 is also provided below the first magnet 56. The stop block 57 abuts against or separates from the connecting rod 58 as the push-pull frame 5 moves axially along the rotating shaft 55.

[0042] In a specific embodiment, Figure 1 , Figure 6 and Figure 8As shown, drawer rails connected to the push-pull frame 5 are provided on both sides of the inner wall of the cabinet 1, and a second handle 53 is also provided on the side of the push-pull frame 5 away from the inside of the cabinet 1, so that the user can easily pull the push-pull frame 5 out of or into the inside of the cabinet 1 along the direction of the drawer rail by pulling the second handle 53, so as to facilitate the replacement of the material to be tested 7 on the support plate 51. Follower wheels 54 are also provided on both sides of the push-pull frame 5, and wedge blocks 34 matching with the follower wheels 54 are provided on both sides of the bottom of the pressing plate 3. Specifically, when the pressing plate 3 is pressed downward by an external force, the wedge blocks 34 on the bottom surface of the pressing plate 3 will move downward accordingly. At this time, if the push-pull frame 5 is located in the cabinet 1, the follower wheel 54 will roll along the inclined surface at the bottom of the wedge plate, and this movement process will drive the entire push-pull frame 5 to move further into the cabinet 1 along the drawer rail. The push-pull frame 5 can automatically adjust its position when it is pressed downward by the pressure plate 3, thus preventing the push-pull frame 5 from sliding on the drawer rail and causing the push-pull frame 5 to be misaligned with the sound insulation tube 4. This design can ensure that the through hole on the support plate 51 and the material to be tested 7 are directly above the sound insulation tube 4 during testing, thereby ensuring stable testing.

[0043] Among them, connecting rods 58 are arranged on the left and right sides of the push-pull frame 5, and a rotating shaft 55 is arranged at one end of the push-pull frame 5 away from the second handle 53. The rotating shaft 55 is rotatably embedded between the two connecting rods 58, giving the push-pull frame 5 the ability to rotate. In particular, by rotating the push-pull frame 5 downward, the material 7 to be tested placed on the support plate 51 can be conveniently demonstrated. At one end of the push-pull frame 5 close to the second handle 53, a first magnet 56 is installed on the left and right sides respectively, and the first magnet 56 and the second magnet 581 at the corresponding position on the connecting rod 58 attract each other. When the push-pull frame 5 is in a stationary state and does not need to rotate, the mutual adsorption of the first magnet 56 and the second magnet 581 ensures that the push-pull frame 5 can be firmly maintained between the two connecting rods 58, preventing unnecessary displacement. And on the push-pull frame 5, a stop block 57 is arranged below each first magnet 56. The stop block 57 will contact or separate with the connecting rod 58 as the push-pull frame 5 moves along the axial direction of the rotating shaft 55. Specifically, when the push-pull frame 5 rotates upward, the stopper 57 will contact the connecting rod 58, thereby preventing the push-pull frame 5 from rotating upward, ensuring that the push-pull frame 5 can only rotate downward. This is because the support plate 51 is located above the push-pull frame 5. If the push-pull frame 5 rotates upward, the material to be tested 7 on the support plate 51 will fall off. This design can avoid the risk of damage caused by the material to be tested 7 falling off due to accidental rotation of the push-pull frame 5.

[0044] Furthermore, one end of the sound insulation tube 4 is fixed to the inner wall of the bottom of the cabinet 1, and the other end passes through the partition 2 and is fixed on the partition 2; The airbag 42 is arranged on the side wall of the sound insulation tube 4 passing through one end of the partition 2, the air pump 21 is located at the bottom of the partition 2, and the airbag 42 is connected to the air pump 21 through an air guide tube.

[0045] Furthermore, a photoelectric switch is arranged inside the cabinet, a controller is arranged outside the cabinet, and a sensing block cooperating with the photoelectric switch is arranged at the bottom of the pressing plate. When the sensing block moves with the pressing plate to the position of the photoelectric switch, the photoelectric switch is triggered, and the controller controls the air pump to start, so that the airbag is inflated; The airbag is also provided with a solenoid valve. When the induction block moves away from the position of the photoelectric switch as the pressure plate moves, the controller controls the solenoid valve to open to discharge the gas inside the airbag.

[0046] In a specific embodiment, Figures 2 to 7 As shown, two sound insulation tubes 4 are arranged between the bottom of the cabinet 1 and the partition 2, and the upper ends of the two sound insulation tubes 4 are arranged through the partition 2. The air bag 42 is arranged around the side wall of the sound insulation tube 4 passing through one end of the partition 2, and an air pump 21 is arranged at the bottom center of the partition 2. The air pump 21 is located between the two sound insulation tubes 4, and the air bags 42 on the two sound insulation tubes 4 are connected to the air pump 21 through the air guide tube to realize the inflation function of the air bag 42.

[0047] Here, a photoelectric switch 13 is provided inside the cabinet 1, and a controller 15 is provided outside the cabinet 1. A sensing block 35 cooperating with the photoelectric switch 13 is provided at the bottom of the pressing plate 3, and the sensing block 35 is provided on the side of the wedge block 34 facing the inner wall of the cabinet 1. In use, when the pressing plate 3 moves downward and the material 7 to be detected contacts the upper opening of the sound insulation tube 4, the sensing block 35 moves with the pressing plate 3 to the position of the photoelectric switch 13. At this time, the photoelectric switch 13 triggers to transmit a signal to the controller 15, and the controller 15 starts the air pump 21 to inflate the airbag 42, so that the material 7 to be detected is pressed against the upper opening of the sound insulation tube 4. When the material 7 to be detected needs to be replaced, the pressing plate 3 moves upward, and the sensing block 35 moves with the pressing plate 3 and leaves the position of the photoelectric switch 13. At this time, the controller 15 controls the electric valve to open, so that the gas in the airbag 42 is discharged through the electric valve, so that the material 7 to be detected is smoothly separated from the sound insulation tube 4. This design enables the airbag 42 to automatically press or loosen the material to be tested 7 and the sound insulation tube 4 as the pressure plate 3 moves, thereby improving the overall automation level.

[0048] Furthermore, rotating plates 14 are arranged on both sides of the cabinet 1 , and the display screen 11 is arranged on the rotating plates 14 . One end of the rotating plates 14 is connected to the cabinet 1 through a hinge, and the other end of the rotating plates 14 can be in contact with or separated from the cabinet 1 .

[0049] Furthermore, sound insulation cotton 43 is arranged around the outer wall of the sound insulation cylinder 4 .

[0050] Furthermore, a base 6 is provided below the cabinet 1 , a rotating platform 61 is rotatably provided on the base 6 , and the cabinet 1 is fixed to the rotating platform 61 and can rotate on the base 6 along with the rotating platform 61 .

[0051] In a specific embodiment, Figure 5 , Fig. 9 and Fig.10 As shown, rotating plates 14 are provided on both sides of the cabinet 1. These two rotating plates 14 not only serve as supporting structures, but also have display screens 11 thereon, which provide convenience for demonstration. One end of the rotating plate 14 is connected to the side of the cabinet 1 through a hinge, so that the rotating plate 14 can abut or separate from the cabinet 1 as the hinge moves. The display screen 11 is located on the side of the rotating plate 14 facing the inside of the cabinet 1, which plays a role in protecting the display screen 11. When the display screen 11 is not needed, the rotating plate 14 can be rotated to a position that fits the cabinet 1, which not only reduces the occupied space of the present application, but also effectively avoids the risk of accidental collision or damage to the display screen 11. A circle of sound insulation cotton 43 is also provided around the outer wall of the sound insulation tube 4 to further ensure the detection effect of the sound insulation performance of the material 7 to be tested.

[0052] A base 6 is provided below the cabinet 1, and a rotating table 61 is installed on the base 6. The rotating table 61 has a rotating function and can perform circular motion around its center point. The cabinet 1 is fixed on the upper surface of the rotating table 61, so that the cabinet 1 can rotate on the base 6 as the rotating table 61 rotates. Combined with the design that the push-pull frame 5 can rotate downward and demonstrate the material to be tested 7 on the support plate 51, and the display screens 11 on both sides of the cabinet 1, a full range of demonstration effects are formed together. When the cabinet 1 rotates with the rotating table 61, the material to be tested 7 and the display screen 11 on the push-pull frame 5 can face students in different directions as they rotate, thereby enhancing the demonstration effect. Taking the school practical training class as an example, when the teacher needs to demonstrate the material to be tested 7 (such as various building materials) to students in multiple directions, he only needs to push the cabinet 1 to rotate to the desired direction. In this way, no matter where the students sit, they can clearly see the demonstration content, which greatly improves the interactivity and demonstration effect of teaching.

[0053] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A teaching and demonstration device for the sound insulation performance of building materials, comprising a cabinet (1), characterized in that: A partition (2) is arranged inside the cabinet (1); a pressure plate (3) is movably arranged above the partition (2) and can move toward or away from the partition (2); a plurality of sound insulation tubes (4) are arranged below the partition (2); and a loudspeaker (41) is arranged inside the sound insulation tube (4); A push-pull frame (5) is provided between the partition (2) and the pressing plate (3); a support plate (51) for placing the material to be detected (7) is provided on the push-pull frame (5); a through hole for the sound insulation tube (4) to pass through is provided on the support plate (51); the support plate (51) is connected to the bottom of the push-pull frame (5) via a metal spring sheet (52); the support plate (51) moves closer to or farther from the bottom of the push-pull frame (5) as the pressing plate (3) moves, so that the material to be detected (7) abuts against or separates from the upper opening of the sound insulation tube (4); a sound sensor (31) is provided on the pressing plate (3); the sound sensor (31) is located directly above the sound insulation tube (4); and display screens (11) for displaying data detected by the sound sensor (31) are provided on both sides of the cabinet (1); The sound insulation tube (4) is provided with an air bag (42) connected to the air pump (21), and the bottom surface of the pressure plate (3) is provided with a sleeve (32). When the material to be tested (7) abuts against the upper opening of the sound insulation tube (4), the air pump (21) is started to inflate the air bag (42), so that the material to be tested (7) is simultaneously in contact with the inner wall of the sleeve (32) and the upper opening of the sound insulation tube (4).

2. A teaching demonstration device for sound insulation performance of building materials according to claim 1, characterized in that: The two ends of the partition (2) are respectively fixed to the inner walls of both sides of the cabinet (1); the pressing plate (3) is fixed to the partition (2) via a plurality of guide columns (22); a spring (23) is provided on the guide column (22); a first handle (33) is also provided on the upper surface of the pressing plate (3); by pulling the first handle (33), the pressing plate (3) can move toward or away from the partition (2) along the setting direction of the guide column (22); a positioning block is also provided on the side of the pressing plate (3); and a buckle (12) that can be engaged with or separated from the positioning block is provided on the cabinet (1).

3. A teaching demonstration device for sound insulation performance of building materials according to claim 2, characterized in that: Drawer rails connected to the push-pull frame (5) are arranged on both sides of the cabinet (1); a second handle (53) is arranged on the push-pull frame (5); and by pulling the second handle (53), the push-pull frame (5) can enter or exit the interior of the cabinet (1) along the arrangement direction of the drawer rails; The push-pull frame (5) is further provided with follower wheels (54) on both sides, and the bottom surface of the pressure plate (3) is provided with a wedge block (34) that cooperates with the follower wheel (54). When the push-pull frame (5) is located inside the cabinet (1), the wedge block (34) moves with the pressure plate (3) and abuts against or separates from the follower wheel (54).

4. A teaching demonstration device for sound insulation performance of building materials according to claim 3, characterized in that: Connecting rods (58) are provided on both sides of the push-pull frame (5), and a rotating shaft (55) is provided at one end of the push-pull frame (5) away from the second handle (53), and the rotating shaft (55) is rotatably provided between the two connecting rods (58).

5. A teaching demonstration device for sound insulation performance of building materials according to claim 4, characterized in that: The push-pull frame (5) is provided with first magnets (56) on both sides of the left and right sides of one end of the second handle (53); the connecting rod (58) is provided with a second magnet (581) that cooperates with the first magnet (56); and a stop block (57) is further provided below the first magnet (56); the stop block (57) abuts against or separates from the connecting rod (58) as the push-pull frame (5) moves axially along the rotating shaft (55).

6. A teaching demonstration device for sound insulation performance of building materials according to claim 3, characterized in that: One end of the sound insulation tube (4) is fixed to the inner wall of the bottom of the cabinet (1), and the other end passes through the partition (2) and is fixed on the partition (2); The air bag (42) is arranged on the side wall of the sound insulation tube (4) passing through one end of the partition (2), the air pump (21) is located at the bottom of the partition (2), and the air bag (42) is connected to the air pump (21) via an air guide tube.

7. A teaching demonstration device for sound insulation performance of building materials according to claim 6, characterized in that: A photoelectric switch (13) is arranged on the inner side of the cabinet (1), a controller (15) is arranged on the outer side of the cabinet (1), and a sensing block (35) cooperating with the photoelectric switch (13) is arranged on the bottom of the pressing plate (3). When the sensing block (35) moves with the pressing plate (3) to the position of the photoelectric switch (13), the photoelectric switch (13) is triggered, and the controller (15) controls the air pump (21) to start, so that the air bag (42) is inflated; The airbag (42) is also provided with a solenoid valve. When the induction block (35) moves away from the position of the photoelectric switch (13) as the pressure plate (3) moves, the controller (15) controls the solenoid valve to open, so that the gas inside the airbag (42) is discharged.

8. A teaching demonstration device for sound insulation performance of building materials according to claim 1, characterized in that: Rotating plates (14) are arranged on both sides of the cabinet (1), the display screen (11) is arranged on the rotating plates (14), one end of the rotating plates (14) is connected to the cabinet (1) via a hinge, and the other end of the rotating plates (14) can be in contact with or separated from the cabinet (1).

9. A teaching demonstration device for sound insulation performance of building materials according to claim 1, characterized in that: Sound insulation cotton (43) is arranged around the outer wall of the sound insulation cylinder (4).

10. A teaching demonstration device for sound insulation performance of building materials according to claim 1, characterized in that: A base (6) is arranged below the cabinet (1), a rotating platform (61) is rotatably arranged on the base (6), and the cabinet (1) is fixed to the rotating platform (61) and can rotate on the base (6) along with the rotating platform (61).

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