TPU film air permeability detection device capable of adjusting air volume

Abstract

The utility model discloses a TPU film air permeability detection device capable of adjusting air volume, a mounting rack is arranged above a workbench, a frequency conversion fan is arranged on the top of the outer side of the mounting rack, and an air outlet of the frequency conversion fan is communicated with an air blowing pipe arranged on the inner side of the mounting rack through an air outlet pipe; an air speed adjusting mechanism matched with the air blowing pipe is installed in the air blowing pipe and comprises a fixing disc, the fixing disc is connected with the inner wall of the air blowing pipe, a plurality of sets of air outlet holes are formed in the fixing disc, and a rotating disc is rotationally connected to the top end of the fixing disc; and a plurality of sets of moving holes matched with the air outlet holes are formed in the rotating disc, a gear ring is arranged on the outer side of the rotating disc, and the gear ring is meshed with the gear. According to the TPU film air permeability detection device capable of adjusting the air outlet amount, in order to solve the problem that an existing air permeability detection device cannot adjust the air outlet speed, a frequency conversion fan is arranged at the top of the outer side of a mounting frame.

Description

Technical Field

[0001] The utility model relates to the technical field of TPU films, in particular to a TPU film air permeability detection device capable of adjusting the air output. Background Art

[0002] TPU (thermoplastic polyurethane) is gaining increasing popularity due to its superior performance and environmentally friendly design. It can be used as a PVC alternative wherever PVC is used. However, TPU's advantages far outweigh those of PVC. TPU not only boasts exceptional high tension, high tensile strength, toughness, and aging resistance, but is also a proven environmentally friendly material. TPU has been widely used in: footwear, clothing, inflatable toys, water and underwater sports equipment, medical equipment, fitness equipment, car seat materials, umbrellas, luggage, leather bags, etc. TPU film is made from TPU granules through calendering, casting, blown film, coating and other processes. TPU film has been used as fabric for nearly 30 years. Its earliest application was to replace PVC, which people have always believed to have "good appearance and feel". PVC lacks flexibility, plasticizer migration, is not wear-resistant, has poor low-temperature performance, and poor transparency. These have created opportunities for TPU to replace PVC. In addition, TPU provides an excellent soft feel and high surface gloss, and can be processed into the appearance and feel of leather. Due to its scope of use, TPU film needs to be tested for its air permeability during the production process, which requires the use of an air permeability testing device.

[0003] A search revealed an existing air permeability testing device, such as the one in announcement number CN219870851U, which includes a workbench, a backboard, a testing platform, and a negative pressure pump. The workbench is provided with a gas flow sensor, the lower surface of the workbench is provided with a support seat, the upper surface of the workbench is provided with a testing platform, a flow hole is provided in the middle of the testing platform, and the flow hole is located directly above the gas flow sensor. Positioning tubes are symmetrically provided on the testing platform, and the positioning tubes are interconnected with the negative pressure pump. The backboard is provided on the side of the upper surface of the workbench, and a blowpipe is provided on the backboard, and the blowpipe is located above the testing platform. The present invention facilitates rapid positioning of the mask through the coordination between the structures and the effect of negative pressure, thereby reducing the testing time of a single mask.

[0004] In summary, the existing air permeability detection device facilitates rapid positioning and reduces the detection time through the effect of negative pressure. However, the existing air permeability detection device cannot adjust the air outlet speed and cannot understand the air permeability under different wind speeds. Therefore, a TPU film air permeability detection device with adjustable air outlet is proposed. Utility Model Content

[0005] The purpose of the utility model is to provide a TPU film air permeability detection device with adjustable air output, so as to solve the problem that the existing air permeability detection device mentioned in the above background technology cannot adjust the air output speed.

[0006] To achieve the above-mentioned objectives, the utility model provides the following technical solutions: a TPU film air permeability detection device with adjustable air outlet, comprising a workbench, a gas flow sensor is provided in the workbench, and a detection platform is provided on the upper surface of the workbench, a flow hole is provided at the middle position of the detection platform, and the flow hole is directly above the gas flow sensor, a mounting bracket is provided above the workbench, and a variable frequency fan is provided on the top of the outer side of the mounting bracket, the air outlet of the variable frequency fan is connected to the blowing pipe provided on the inner side of the mounting bracket through an air outlet pipe, and a wind speed adjustment mechanism matching it is installed inside the blowing pipe, the wind speed adjustment mechanism comprises a fixed plate, the fixed plate is connected to the inner wall of the blowing pipe, and a plurality of groups of air outlet holes are provided on the fixed plate, the top of the fixed plate is rotatably connected to a rotating plate, and a plurality of groups of movable holes matching the air outlet holes are provided on the rotating plate, a gear ring is provided on the outer side of the rotating plate, and the gear ring is meshed with a gear.

[0007] Preferably, a film limiting mechanism for use with the TPU film is provided on the inner side of the mounting frame.

[0008] Through the above technical solution, it is convenient to limit the TPU film.

[0009] Preferably, the film limiting mechanism includes a first drive motor, and the output end of the first drive motor is connected to a double-groove driving wheel arranged inside the mounting box, the double-groove driving wheel is connected to the driven wheels arranged on both sides through a transmission belt, and the driven wheels are installed on the outside of the screw mechanism, one end of the screw mechanism passes through the inside of the mounting frame and is connected to the sleeve, and a limiting plate is installed at the bottom of the sleeve.

[0010] Through the above technical solution, it is convenient to limit the TPU film.

[0011] Preferably, limiting slides are provided on both sides of the top of the sleeve, and the limiting slides are slidably connected to the limiting rods provided on the inner top of the mounting frame.

[0012] The above technical solution makes it easy to limit the moving direction of the sleeve.

[0013] Preferably, the gear is mounted on the outside of the rotating rod, and one end of the rotating rod is connected to the output end of the second driving motor.

[0014] Through the above technical solution, it is easy to drive the gear to rotate.

[0015] Preferably, the rotating rod is rotatably connected to the inside of the protective cover, and the second drive motor is installed on the outside of the protective cover.

[0016] Through the above technical solution: the rotation stability of the rotating rod is improved.

[0017] Compared with the prior art, the beneficial effects of the utility model are as follows: the TPU film air permeability detection device with adjustable air outlet volume solves the problem that the existing air permeability detection device cannot adjust the air outlet speed. A variable frequency fan is arranged on the top of the outer side of the mounting frame. The air outlet of the variable frequency fan is connected with the blowing pipe arranged on the inner side of the mounting frame through the air outlet pipe, and a wind speed adjustment mechanism matching it is installed inside the blowing pipe. The wind speed adjustment mechanism includes a fixed plate, which is connected to the inner wall of the blowing pipe, and a plurality of groups of air outlet holes are opened on the fixed plate. The top of the fixed plate is rotatably connected to a rotating plate, and a plurality of groups of movable holes matching the air outlet holes are opened on the rotating plate. A gear ring is arranged on the outer side of the rotating plate, and the gear ring is engaged with the gear. By adjusting the second driving motor in the wind speed adjustment mechanism, the movable hole is driven to move, and the movement of the movable hole changes the gap between the movable hole and the air outlet hole, thereby changing the air outlet flow rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall front view cross-sectional structure of the utility model;

[0019] Figure 2 For this utility model Figure 1 A in the middle is an enlarged structural diagram;

[0020] Figure 3 This is a schematic diagram of the wind speed adjustment mechanism structure of the utility model;

[0021] Figure 4 This is a schematic diagram of the wind speed adjustment mechanism of the utility model from a top view.

[0022] In the figure: 1. workbench; 2. gas flow sensor; 3. test bench; 301. flow hole; 4. mounting bracket; 5. variable frequency fan; 501. air outlet pipe; 6. air blowing pipe; 7. wind speed adjustment mechanism; 701. fixed plate; 702. air outlet; 703. rotating plate; 704. moving hole; 705. gear ring; 706. gear; 707. rotating rod; 708. second drive motor; 709. protective cover; 8. TPU film; 9. film limiting mechanism; 901. first drive motor; 902. mounting box; 903. double-groove driving wheel; 904. transmission belt; 905. driven wheel; 906. screw mechanism; 907. sleeve; 908. limiting plate; 909. limiting slide plate; 9091. limiting rod. 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0024] See also Figure 1-4 The utility model provides a technical solution: a TPU film air permeability detection device with adjustable air volume, according to Figure 1 and Figure 2 As shown, a gas flow sensor 2 is provided inside the workbench 1 , and a detection platform 3 is provided on the upper surface of the workbench 1 .

[0025] To further illustrate, the gas flow sensor 2 is an existing technology, and the model can be roughly referred to as AWM43300V. The gas flow sensor 2 can detect the gas flow passing through the TPU film 8, thereby inferring the air permeability of the TPU film 8.

[0026] Specifically, a flow hole 301 is opened in the middle position of the detection table 3, and the flow hole 301 is located directly above the gas flow sensor 2, so that the gas passing through the TPU film 8 can be detected by the gas flow sensor 2. A mounting bracket 4 is provided above the workbench 1, and a film limiting mechanism 9 is provided on the inner side of the mounting bracket 4 for use with the TPU film 8.

[0027] Specifically, the film limiting mechanism 9 includes a first drive motor 901, and the output end of the first drive motor 901 is connected to a double-groove driving wheel 903 arranged inside the installation box 902, and the double-groove driving wheel 903 is connected to the driven wheels 905 arranged on both sides through a transmission belt 904, and the driven wheels 905 are installed on the outside of the screw mechanism 906, one end of the screw mechanism 906 passes through the inside of the mounting frame 4 and is connected to the sleeve 907, and a limiting plate 908 is installed at the bottom of the sleeve 907.

[0028] In a further embodiment, limiting slides 909 are provided on both sides of the top of the sleeve 907, and the limiting slides 909 are slidably connected to the limiting rod 9091 provided on the inner top of the mounting frame 4. Through the above arrangement, the moving direction of the sleeve 907 can be limited, thereby improving the stability of the sleeve 907 during movement.

[0029] To further explain, the film limiting mechanism 9 can limit the position of the TPU film 8 placed on the detection table 3. When the position of the TPU film 8 needs to be limited, the first drive motor 901 is turned on. Under the action of the first drive motor 901, the double-groove driving wheel 903 rotates, thereby driving the driven wheels 905 arranged on both sides to rotate through the transmission belt 904. Under the action of the rotation of the driven wheel 905, the screw mechanism 906 rotates to drive the sleeve 907 to move downward, and the sleeve 907 drives the limiting plate 908 to move downward, so that the limiting plate 908 presses down the TPU film 8, thereby limiting the position of the TPU film 8. A rubber protective layer can be provided at the bottom of the limiting plate 908, thereby providing a certain protection for the TPU film 8.

[0030] according to Figure 1 and Figure 3-4 As shown, a variable frequency fan 5 is provided on the top outside of the mounting frame 4, and the air outlet of the variable frequency fan 5 is connected to the blowing pipe 6 provided on the inner side of the mounting frame 4 through the air outlet pipe 501, and a wind speed adjustment mechanism 7 matching it is installed inside the blowing pipe 6.

[0031] Further explanation: the variable frequency fan 5 is a prior art, and its structure can refer to GR-180A. By setting the variable frequency fan 5, the air volume can be adjusted according to the situation, thereby detecting the air permeability of the TPU film 8 with different air volumes.

[0032] Specifically, the wind speed adjustment mechanism 7 includes a fixed disk 701, which is connected to the inner wall of the blowing pipe 6, and has several groups of air outlet holes 702 on the fixed disk 701. The top of the fixed disk 701 is rotatably connected to a rotating disk 703, and the rotating disk 703 has several groups of movable holes 704 matching the air outlet holes 702. A gear ring 705 is provided on the outside of the rotating disk 703, and the gear ring 705 is engaged with the gear 706.

[0033] Specifically, the gear 706 is installed on the outside of the rotating rod 707, and one end of the rotating rod 707 is connected to the output end of the second drive motor 708. The rotating rod 707 is rotatably connected to the inside of the protective cover 709, and the second drive motor 708 is installed on the outside of the protective cover 709.

[0034] When the wind speed of the blower pipe 6 needs to be adjusted, the second drive motor 708 is turned on. Under the action of the second drive motor 708, the rotating rod 707 drives the gear 706 to rotate, thereby driving the gear ring 705 and the rotating disk 703 to rotate through the gear 706, and the rotating disk 703 drives the movable hole 704 to move. The movement of the movable hole 704 changes the gap between it and the air outlet hole 702, thereby changing the air outlet flow rate.

[0035] The directions or positional relationships indicated by terms such as "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the directions or positional relationships shown in the accompanying drawings. They are merely simplified descriptions for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the protection content of the present invention.

[0036] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A TPU film air permeability detection device with adjustable air output, comprising a workbench (1), characterized in that: A gas flow sensor (2) is provided in the workbench (1), and a detection platform (3) is provided on the upper surface of the workbench (1). A flow hole (301) is provided at the middle position of the detection platform (3), and the flow hole (301) is located directly above the gas flow sensor (2). A mounting frame (4) is provided above the workbench (1), and a variable frequency fan (5) is provided on the top of the outer side of the mounting frame (4). The air outlet of the variable frequency fan (5) is connected to the blowing pipe (6) provided on the inner side of the mounting frame (4) through an air outlet pipe (501), and the blowing pipe (6) is provided with a The wind speed regulating mechanism (7) matched therewith comprises a fixed disk (701), the fixed disk (701) being connected to the inner wall of the blowing pipe (6), and the fixed disk (701) being provided with a plurality of groups of air outlet holes (702), the top end of the fixed disk (701) being rotatably connected to a rotating disk (703), and the rotating disk (703) being provided with a plurality of groups of movable holes (704) matching the air outlet holes (702), and a gear ring (705) being provided on the outer side of the rotating disk (703), and the gear ring (705) being meshed with a gear (706).

2. The TPU film air permeability detection device with adjustable air volume according to claim 1, characterized in that: A film limiting mechanism (9) for use with the TPU film (8) is provided on the inner side of the mounting frame (4).

3. The TPU film air permeability detection device with adjustable air volume according to claim 2, characterized in that: The film limiting mechanism (9) comprises a first driving motor (901), and the output end of the first driving motor (901) is connected to a double-grooved driving wheel (903) provided inside the installation box (902), the double-grooved driving wheel (903) is connected to driven wheels (905) provided on both sides via a transmission belt (904), and the driven wheels (905) are installed outside a screw mechanism (906), one end of the screw mechanism (906) passes through the interior of the installation frame (4) and is connected to a sleeve (907), and a limiting plate (908) is installed at the bottom of the sleeve (907).

4. The TPU film air permeability detection device with adjustable air volume according to claim 3, characterized in that: Limiting slides (909) are provided on both sides of the top of the sleeve (907), and the limiting slides (909) are slidably connected to limiting rods (9091) provided on the top of the inner side of the mounting frame (4).

5. The TPU film air permeability detection device with adjustable air volume according to claim 1, characterized in that: The gear (706) is installed on the outside of the rotating rod (707), and one end of the rotating rod (707) is connected to the output end of the second driving motor (708).

6. The TPU film air permeability detection device with adjustable air volume according to claim 5, characterized in that: The rotating rod (707) is rotatably connected to the inside of the protective cover (709), and the second driving motor (708) is installed outside the protective cover (709).

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