Device for testing air permeability of water-blocking non-woven fabric

Abstract

The utility model discloses a water-blocking non-woven fabric air permeability testing device, which relates to the technical field of air permeability detection, and comprises a bottom plate, holes are formed in the upper end and the lower end of the bottom plate, a first cavity is arranged above the holes, a second cavity is arranged below the first cavity, an air transmission port is arranged in the first cavity, a pressure tester is arranged in the middle of the air transmission port, and a pressure sensor is arranged in the middle of the pressure tester. Four supporting columns are arranged at the lower end of the bottom plate, a supporting frame is erected in the middle of the four supporting columns, four vertical pipes are arranged at the upper end of the bottom plate, two rotating shafts are arranged in the middle of the vertical pipes, a positioning mechanism is arranged at the upper end of the bottom plate, a cutting assembly is arranged at the left ends of the two supporting columns, and an adjusting piece is arranged in the middle of the supporting frame. A first pushing block lifts a first cavity, the specific position of the water-blocking non-woven fabric is tested, the water-blocking non-woven fabric is cut through a blade, and the size is matched for testing; cloth pressure is detected through a spring, when the pressure is exceeded, a transmission rod descends to relieve, and the relaxation degree of the water-blocking non-woven fabric is kept.

Description

Technical Field

[0001] The utility model relates to the technical field of air permeability detection, in particular to an air permeability testing device for water-blocking nonwoven fabrics. Background Art

[0002] Air permeability testing refers to the measurement of a material's permeability to gas. These parameters are crucial for the selection of materials for product development. By comparing the air permeability of different materials, companies can choose appropriate materials to optimize their products, thereby improving product competitiveness. Air permeability testing is an important means to ensure that materials meet specific application requirements and has a direct impact on product quality, safety, and user experience.

[0003] Patent announcement number CN218412196U records a polyester grey cloth air permeability testing device, including a main body, a support column, an electric telescopic rod and a cloth pressing plate. The cloth pressing plate is provided with a rubber ring. When the cloth pressing plate moves down to contact the cloth, the rubber ring is used for buffering to reduce the gap between the cloth and the cloth pressing plate, which is convenient for detection. When the cloth is subjected to gas permeability measurement, the air pressure inside the cloth pressing plate becomes smaller, and the tension of the cloth will be affected by the pressure inside the plate, resulting in inaccurate measurement results. When the cloth size is too large, the cloth needs to be cut, which interferes with the measurement work. The cloth pressing plate cannot adjust its position, and it is difficult to perform air permeability test on the cloth at a specific position.

[0004] Based on this, a water-blocking nonwoven fabric air permeability testing device is now provided, which can eliminate the disadvantages of the existing devices. Utility Model Content

[0005] The utility model aims to provide a device for testing the air permeability of water-blocking nonwoven fabrics to solve the problems in the background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A water-blocking nonwoven fabric air permeability testing device comprises a bottom plate, wherein the upper and lower ends of the bottom plate are both opened, a No. 1 cavity is arranged above the opening, a No. 2 cavity is arranged below the No. 1 cavity, gas transmission ports are arranged inside the No. 1 cavity and the No. 2 cavity, a pressure gauge is arranged in the middle of the gas transmission port, four supporting columns are arranged at the lower end of the bottom plate, a supporting frame is arranged in the middle of the four supporting columns, four vertical pipes are arranged at the upper end of the bottom plate, two rotating shafts are fixedly connected in the middle of two of the vertical pipes, a No. 1 rotating wheel is arranged on the rotating shaft, a positioning mechanism is arranged at the upper end of the bottom plate, a cutting assembly is arranged at the left end of the two supporting columns, and an adjusting member is arranged in the middle of the supporting frame.

[0008] On the basis of the above technical solutions, the present invention also provides the following optional technical solutions:

[0009] In an optional scheme: the positioning mechanism includes a support rod, four support rods are fixedly connected to the base plate around the opening position, two hydraulic rods are provided on the side surfaces of the support rods, the output ends of the two hydraulic rods are fixedly connected to the connecting block, the connecting block is fixedly connected to the No. 2 push block, the four output ends of the No. 2 push blocks are fixedly connected to the fixed block, the lower end of the fixed block is fixedly connected to the No. 1 push block, and the output end of the No. 1 push block is fixedly connected to the No. 1 cavity.

[0010] In an optional scheme: the cutting assembly includes a fixed shaft arranged between the two left support columns, a No. 2 rotating wheel is provided on the fixed shaft, a conveyor belt is provided on the surface of the No. 2 rotating wheel and the No. 1 rotating wheel, a horizontal tube is provided above the No. 2 rotating wheel, the upper end of the horizontal tube is fixedly connected to two vertical tubes, the upper ends of the two vertical tubes are fixedly connected to the bottom surface of the base plate, protective shells are provided at both ends of the horizontal tube, and blades are provided inside the protective shells.

[0011] In an optional scheme: the adjusting member includes a base, the base is fixedly connected to the support frame, the upper end of the base is fixedly connected to four telescopic rods, the upper ends of the telescopic rods are fixedly connected to the support plate, four fixing seats are provided on the upper surface of the support plate, two No. 1 push rods are provided between two fixing seats in the horizontal direction, the fixing seat is fixedly connected to the fixed end of the No. 1 push rod, the output end of the No. 1 push rod is fixedly connected to the fixed end of the No. 2 push rod, the two No. 2 push rod output ends are fixedly connected to the No. 2 cavity, two bases are vertically provided on the support plate, a spring is provided inside the base, a transmission block is provided on the upper end of the spring, and the upper end of the transmission block is fixedly connected to the transmission rod.

[0012] In an optional solution, the distance between the two blades is greater than the width of the conveyor belt.

[0013] In an optional solution: the gas delivery surfaces of the No. 1 cavity and the No. 2 cavity are both provided with sealing rubber rings.

[0014] In an optional solution, the length of the transmission rod is greater than the length of the conveyor belt.

[0015] In an optional solution: the height of the base is greater than the height of the fixing base.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] 1. The utility model positions the No. 1 cavity in a horizontal position by means of a hydraulic rod and a No. 2 push block, and lifts the No. 1 cavity by means of the No. 1 push block, thereby playing a role in measuring a specific position of the water-blocking nonwoven fabric.

[0018] 2. The utility model uses a blade to cut the water-blocking nonwoven fabric, a conveyor belt to transport the water-blocking nonwoven fabric, and an adaptive measurement size to quickly perform the test.

[0019] 3. The utility model detects the fabric pressure in real time through a spring, and when the pressure exceeds the limit, the tension and relaxation of the water-blocking nonwoven fabric is relieved by lowering the transmission rod, so as to keep the tension and relaxation of the water-blocking nonwoven fabric consistent during the measurement process. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the utility model.

[0021] Figure 2 It is a structural schematic diagram of the positioning mechanism of the utility model.

[0022] Figure 3 This is a schematic diagram of the structure of the No. 1 push block and the No. 1 cavity of the utility model.

[0023] Figure 4 This is a schematic diagram of the structure of cavity No. 1 and cavity No. 2 of the utility model.

[0024] Figure 5 It is a structural schematic diagram of the adjusting member of the utility model.

[0025] Figure 6 It is a structural schematic diagram of the cutting assembly of the utility model.

[0026] Figure 7 It is a schematic diagram of the structure of the adjusting transmission rod, transmission block and spring of the utility model.

[0027] Notes on reference numerals: 101. bottom plate, 102. support column, 103. support frame, 104. cavity No. 1, 105. cavity No. 2, 106. vertical pipe, 107. rotating shaft, 108. No. 1 rotating wheel, 109. Pressure gauge, 110. Gas outlet, 111. Sealing rubber ring, 201. Support rod, 202. Hydraulic rod, 203. Connecting block, 204. No. 2 pushing block, 205. Fixed block, 206. No. 1 pushing block, 301. Cross tube, 302. Protective shell, 303. Blade, 304. No. 2 rotating wheel, 305. Fixed shaft, 306. Conveyor belt, 307. Vertical pipe, 401. Support plate, 402. Transmission rod, 403. No. 1 push rod, 404. Fixed seat, 405. Telescopic rod, 406. Base, 407. No. 2 push rod, 408. Transmission block, 409. Base, 410. Spring. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0029] Example 1

[0030] In one embodiment, Figure 1 , Figure 4As shown, a water-blocking nonwoven fabric air permeability testing device comprises a bottom plate 101, wherein the bottom plate 101 has holes at both the upper and lower ends, a first cavity 104 is arranged above the hole, a second cavity 105 is arranged below the first cavity 104, gas delivery ports 110 are arranged inside the first cavity 104 and the second cavity 105, a pressure gauge 109 is arranged in the middle of the gas delivery port 110, four support columns 102 are fixedly connected to the lower end of the bottom plate 101, a support frame 103 is arranged in the middle of the four support columns 102, four vertical pipes 106 are arranged at the upper end of the bottom plate 101, two rotating shafts 107 are fixedly connected in the middle of two of the vertical pipes 106, a first rotating wheel 108 is arranged on the rotating shaft 107, and a plurality of rotating wheels 108 are arranged on the bottom plate 101. A positioning mechanism is provided at the upper end of 01, a cutting assembly is provided at the left end of the two support columns 102, and an adjusting member is provided in the middle of the support frame 103. The bottom plate 101 and the support column 102 provide support for the entire test device. The water-blocking nonwoven fabric is clamped by the No. 1 rotating wheel 108 on the rotating shaft 107, and the cavity is evacuated through the gas delivery port 110 inside the No. 1 cavity 104 and the No. 2 cavity 105 to maintain the vacuum state inside the No. 1 cavity 104 and the No. 2 cavity 105. Gas is input through the gas delivery port 110 in the No. 1 cavity 104, and the gas penetrates from the high-pressure side to the low-pressure side. At this time, the pressure gauge 109 inside the No. 2 cavity 105 performs pressure measurement to record the air permeability of the water-blocking nonwoven fabric;

[0031] In one embodiment, Figure 2 , Figure 3 , Figure 4 As shown, the positioning mechanism includes a support rod 201, four support rods 201 are fixedly connected to the bottom plate 101 around the opening position, and two hydraulic rods 202 are arranged on the side surfaces of the four support rods 201. The output ends of the two hydraulic rods 202 are fixedly connected to the connecting block 203, and the connecting block 203 is fixedly connected to the second push block 204. The output ends of the four second push blocks 204 are fixedly connected to the fixed block 205, and the lower end of the fixed block 205 is fixedly connected to the first push block 206, and the output end of the first push block 206 is fixedly connected to the first cavity 10 4. The support rod 201 provides support, the hydraulic rod 202 pushes the connecting block 203, the connecting block 203 is fixedly connected to the No. 2 pushing block 204, the No. 2 pushing block 204 pushes the fixed block 205, and the No. 1 cavity 104 can move in the horizontal direction through the power provided by the hydraulic rod 202 and the No. 2 pushing block 204, and the No. 1 pushing block 206 is fixedly connected to the No. 1 cavity 104. Through the push of the No. 1 pushing block 206, the No. 1 cavity 104 can move up and down, meeting the conditions for performing air permeability test on a specific part of the water-blocking non-woven fabric;

[0032] In one embodiment, Figure 6As shown, the cutting assembly includes a fixed shaft 305 arranged between the two left support columns 102, a No. 2 rotating wheel 304 is arranged on the fixed shaft 305, a conveyor belt 306 is arranged on the surface of the No. 2 rotating wheel 304 and the No. 1 rotating wheel 108, a transverse tube 301 is arranged above the No. 2 rotating wheel 304, the upper end of the transverse tube 301 is fixedly connected to two vertical tubes 307, the upper ends of the two vertical tubes 307 are fixedly connected to the bottom surface of the bottom plate 101, protective shells 302 are arranged at both ends of the transverse tube 301, blades 303 are arranged inside the protective shell 302, fixed by the fixed shaft 305, the water-blocking non-woven fabric is transported by the conveyor belt 306, and the excess fabric is cut by the blade 303, the distance between the two blades 303 is adapted to the length of the conveyor belt 306, to ensure that the size of the cut water-blocking non-woven fabric meets the test requirements, and protective shells 302 are arranged at both ends of the transverse tube 301 to ensure the safety of the user and reduce the risk of use;

[0033] In one embodiment, Figure 5 , Figure 7 As shown, the adjusting member includes a base 406, the base 406 is fixedly connected to the support frame 201, the upper end of the base 406 is fixedly connected to four telescopic rods 405, the upper ends of the telescopic rods 405 are fixedly connected to the support plate 401, four fixing seats 404 are arranged on the upper surface of the support plate 401, two No. 1 push rods 403 are arranged between two fixing seats 404 in the horizontal direction, the fixing seat 404 is fixedly connected to the fixed end of the No. 1 push rod 403, the output end of the No. 1 push rod 403 is fixedly connected to the fixed end of the No. 2 push rod 407, the output ends of the two No. 2 push rods 407 are fixedly connected to the No. 2 cavity 105, two bases 409 are vertically arranged on the support plate 401, a spring 410 is arranged inside the base 409, a transmission block 408 is arranged on the upper end of the spring 410, and the transmission block 408 The upper end is fixedly connected to the transmission rod 402, and four telescopic rods 405 are fixedly connected to the upper end of the base 406. The telescopic rod 405 clamps the water-blocking non-woven fabric by driving the support plate 401 to move up and down. The No. 1 push rod 403 drives the No. 2 push rod 407 to move horizontally, and the No. 2 push rod 407 pushes the No. 2 cavity 105 to move forward and backward. The No. 1 push rod 403 and the No. 2 push rod 407 cooperate with each other, so that the No. 2 cavity 105 can be positioned in the horizontal plane. A spring 410 is provided inside the base 409. The spring 410 always detects the pressure of the water-blocking non-woven fabric on the transmission rod 402. When the pressure exceeds the bearing range of the spring 410, the transmission rod 402 and the transmission block 408 move downward to relieve the tension and relaxation of the water-blocking non-woven fabric, so that the tension and relaxation of the water-blocking non-woven fabric remain consistent during the test;

[0034] Example 2

[0035] In one embodiment, Figure 4As shown, the gas delivery surfaces of the first cavity 104 and the second cavity 105 are both provided with sealing rubber rings 111, through which the first cavity 104 and the second cavity 105 can better maintain the vacuum state in the cavity during the gas extraction process, thereby ensuring the accuracy of the measurement;

[0036] The above embodiment discloses a device for testing the air permeability of a water-blocking nonwoven fabric, wherein the conveyor belt 306 starts to move by starting the second rotating wheel 304 and the first rotating wheel 108, and the water-blocking nonwoven fabric is placed on the upper surface of the conveyor belt 306. The conveyor belt 306 drives the water-blocking nonwoven fabric to move. When the water-blocking nonwoven fabric moves to the position of the blade 303, the blade 303 cuts the water-blocking nonwoven fabric beyond the range of the conveyor belt 306, and the water-blocking nonwoven fabric is cut. After the water-blocking nonwoven fabric is cut, it moves to the top of the bottom plate 101, and the water-blocking nonwoven fabric is placed on the top of the transmission rod 402. The two ends of the water-blocking nonwoven fabric are respectively clamped between the two groups of No. 1 rotating wheels 108. The two groups of No. 1 rotating wheels 108 move in different directions to keep the water-blocking nonwoven fabric taut. The support plate 401 moves upward through the telescopic rod 405, and the transmission rod 402 lifts the water-blocking nonwoven fabric. The spring 410 starts monitoring The pressure value of the water-blocking nonwoven fabric is measured by using the hydraulic rod 202 and the second push block 204 to move the first cavity 104 horizontally to locate the test position, and the first push block 206 is used to drive the first cavity 104 to move downward. The second cavity 105 is positioned by the first push rod 403 and the second push rod 407, and is spliced ​​with the first cavity 104. The spliced ​​first cavity 104 and the second cavity 105 clamp the water-blocking nonwoven fabric, and the gas transmission port 110 is used to The cavity is evacuated to maintain a vacuum state, and then gas is input into the No. 1 cavity 104, and the gas penetrates from the high-pressure side to the low-pressure side. The pressure gauge 109 inside the No. 2 cavity 105 measures the pressure, and the air permeability of the water-blocking non-woven fabric is judged through the data. During the test, if the pressure in the cavity is too high, the spring 410 contracts, and the transmission rod 402 and the transmission block 408 move downward to relieve the tension of the water-blocking non-woven fabric, thereby ensuring the accuracy of the test results.

[0037] The above is only a specific implementation of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A water-blocking nonwoven fabric air permeability testing device, comprising a bottom plate (101), the bottom plate (101) having holes at both the upper and lower ends, a first cavity (104) being arranged above the holes, a second cavity (105) being arranged below the first cavity (104), gas delivery ports (110) being arranged inside the first cavity (104) and the second cavity (105), a pressure gauge (109) being arranged in the middle of the gas delivery port (110), four support columns (102) being fixedly connected to the bottom plate (101), a support frame (103) being arranged in the middle of the four support columns (102), four vertical pipes (106) being arranged at the top end of the bottom plate (101), two rotating shafts (107) being fixedly connected in the middle of two of the vertical pipes (106), a first rotating wheel (108) being arranged on the rotating shaft (107), and characterized in that: It also includes a positioning mechanism arranged at the upper end of the bottom plate (101), a cutting assembly arranged at the left ends of the two support columns (102), and an adjusting member arranged in the middle of the support frame (103).

2. The water-blocking nonwoven fabric air permeability testing device according to claim 1, characterized in that: The positioning mechanism comprises support rods (201), four support rods (201) are fixedly connected to the bottom plate (101) around the opening position, two hydraulic rods (202) are arranged on the side surfaces of the four support rods (201), the output ends of the two hydraulic rods (202) are fixedly connected to the connecting block (203), the connecting block (203) is fixedly connected to the second pushing block (204), the output ends of the four second pushing blocks (204) are fixedly connected to the fixed block (205), the lower end of the fixed block (205) is fixedly connected to the first pushing block (206), and the output end of the first pushing block (206) is fixedly connected to the first cavity (104).

3. The water-blocking nonwoven fabric air permeability testing device according to claim 1, characterized in that: The cutting assembly comprises a fixed shaft (305) arranged between the two left support columns (102); a second rotating wheel (304) is arranged on the fixed shaft (305); a conveyor belt (306) is arranged outside the second rotating wheel (304) and the first rotating wheel (108); a transverse tube (301) is arranged above the second rotating wheel (304); the upper end of the transverse tube (301) is fixedly connected to two vertical tubes (307); the upper ends of the two vertical tubes (307) are fixedly connected to the bottom surface of the bottom plate (101); protective shells (302) are arranged at both ends of the transverse tube (301); and a blade (303) is arranged inside the protective shell (302).

4. The water-blocking nonwoven fabric air permeability testing device according to claim 1, characterized in that: The adjusting member comprises a base (406), the base (406) is fixedly connected to the support frame, the upper end of the base (406) is fixedly connected to four telescopic rods (405), the upper ends of the telescopic rods (405) are fixedly connected to the support plate (401), the upper surface of the support plate (401) is provided with four fixing seats (404), two No. 1 push rods (403) are provided between two fixing seats (404) in the horizontal direction, and the fixing seats (404) are fixedly connected to the No. 1 push rods (403). ), the output end of the No. 1 push rod (403) is fixedly connected to the fixed end of the No. 2 push rod (407), the output ends of the two No. 2 push rods (407) are fixedly connected to the No. 2 cavity (105), two bases (409) are vertically provided on the support plate (401), a spring (410) is provided inside the base (409), a transmission block (408) is provided at the upper end of the spring (410), and the upper end of the transmission block (408) is fixedly connected to the transmission rod (402).

5. The air permeability testing device for water-blocking nonwoven fabric according to claim 3, characterized in that: The distance between the two blades (303) is greater than the width of the conveyor belt (306).

6. The water-blocking nonwoven fabric air permeability testing device according to claim 1, characterized in that: The gas delivery surfaces of the No. 1 cavity (104) and the No. 2 cavity (105) are both provided with sealing rubber rings (111).

7. The device for testing air permeability of water-blocking nonwoven fabric according to claim 4, characterized in that: The length of the transmission rod (402) is greater than the length of the conveyor belt (306).

8. The device for testing air permeability of water-blocking nonwoven fabric according to claim 4, characterized in that: The height of the base (409) is greater than the height of the fixing base (404).

Images