Device for detecting water seepage resistance of wood fiber and straw fiber composite board
By designing a composite sealing structure and a hydraulic cylinder-driven testing device, the problem of leakage caused by seal wear in the water resistance test of wood fiber and straw fiber composite boards was solved, achieving efficient and accurate water resistance test.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- PUYANG SENDA WOOD IND CO LTD
- Filing Date
- 2026-01-26
- Publication Date
- 2026-04-17
AI Technical Summary
In existing tests on the water resistance of wood fiber and straw fiber composite boards, wear or aging of the seals can lead to inaccurate test results, and water can leak from the edges of the boards, affecting the accuracy of the test results.
A detection device comprising a support component, a sealing component, a limiting component, a buffer component, a transmission component, and a tilting component was designed. It adopts a composite sealing structure of double-layer sealing lip, water-absorbing block, and elastic airbag, combined with hydraulic cylinder drive and buffer structure, to achieve efficient sealing and water droplet cleaning.
It improves the accuracy and efficiency of testing, prevents water from seeping from the edges of the board, ensures the authenticity and reliability of the test data, and prevents deformation and jamming of the composite board due to water seepage.
Smart Images
Figure CN121877692A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of composite board water permeability testing technology, and more specifically, to a device for testing the water permeability resistance of wood fiber and straw fiber composite boards. Background Technology
[0002] Wood fiber and straw fiber composite boards, as a new type of environmentally friendly engineered wood product, are widely used in building decoration, furniture manufacturing, packaging and transportation due to their advantages such as renewable raw materials, low cost and stable mechanical properties. In actual use scenarios, these composite boards often face conditions such as humid environments and rainwater erosion. Their water resistance directly affects the safety and service life of use, and therefore has become one of the core indicators for product quality testing.
[0003] While wood fiber and straw fiber composite boards possess excellent mechanical properties, they also pose a certain risk of water seepage. If the wood fiber and straw fiber composite board has poor water resistance, moisture can easily penetrate into the board, leading to delamination, bulging, and cracking. Therefore, water resistance testing is an indispensable quality control step in the production process of fiber composite boards, directly affecting the product's practicality, durability, and market competitiveness.
[0004] Currently, in the process of testing the water resistance of wood fiber and straw fiber composite boards, a single layer of sealing components such as sealing rings or gaskets is often used to simply seal the edges of the fiber composite board. This lack of sufficient sealing protection makes it easy for high-pressure water to leak from the gaps at the edges of the board during testing, rather than penetrating through the board itself, when the sealing components are worn, aged, or the surface of the board is uneven. This seriously affects the accuracy of the test results and can lead to misjudgments that the fiber board has poor water resistance.
[0005] In view of this, we propose a device for testing the water resistance of wood fiber and straw fiber composite boards. Summary of the Invention
[0006] Technical problem to be solved: The purpose of this invention is to provide a device for testing the water resistance of wood fiber and straw fiber composite boards, which solves the technical problems mentioned in the background art.
[0007] Technical Solution: The present invention provides a device for testing the water resistance of wood fiber and straw fiber composite boards, including a sealing component. The device includes a main body, within which a support assembly for supporting the composite board is provided. Above the support assembly is a first elastic airbag for enclosing the composite board. The main body is provided with a first top plate, a second top plate, and two side top plates for sealing. At the bottom of the first top plate, the second top plate, and the side top plates are sealing airbags for sealing and pressing down on the composite board. Each sealing airbag has a sealing assembly for sealing the gap between the composite board and the sealing airbag. At the bottom of the sealing airbag is a limiting assembly for limiting the sealing assembly. The main body is also provided with a pressure plate for pressing down on the top plate. The tilting component includes a buffer assembly disposed within the main body of the detection device for lifting the top plate. A first gear is fixedly connected to the first top plate, and a second gear is fixedly connected to the side top plate. A first lifting rod is disposed below the first top plate, and a second lifting rod is disposed below the side top plate. Both the first top plate and the side top plate are provided with transmission assemblies for driving the first and second lifting rods upward. The tilting component is disposed on the side of the second top plate.
[0008] As an optional solution to the technical solution of this invention, the main body of the detection device includes a fixed base, the fixed base has a placement cavity inside, the bottom of the fixed base has a water outlet, the top of the fixed base has a water outlet pipe, the top of the water outlet pipe has a pressure booster, the side of the pressure booster has a water delivery pipe, the bottom of the side wall of the water outlet pipe has a first sliding groove, a sliding plate is slidably connected to the first sliding groove, and the inside of the first sliding groove has a first elastic element.
[0009] As an optional solution of the technical solution in this invention document, the slide plate is elastically connected to the inner wall of the first slide groove through the first elastic element, the water outlet pipe is located directly above the water outlet, the size of the water outlet is larger than the size of the water outlet pipe, the pressure plate is fixedly connected to the side wall of the water outlet pipe, the pressure device, the water supply pipe and the slide plate are the same size, the pressure device, the water supply pipe and the slide plate are respectively hinged to the top of the fixed base, the pressure device, the water supply pipe and the slide plate are combined to form a flat plate with a central opening, and the size of the opening is adapted to the size of the support component, the first elastic airbag is fixedly connected to the inner wall of the placement cavity, and the sealing airbag is located above the first elastic airbag.
[0010] As an optional solution of the technical solution in this invention document, the support assembly includes a sealing ring fixedly connected to the bottom of the inner wall of the placement cavity, a support plate and a rotating plate are provided above the sealing ring, a sliding rod is fixedly connected to the side of the rotating plate, and a second sliding groove is provided on the inner wall of the placement cavity. The support plate is U-shaped. The rotating plate is rotatably connected to the inner wall of the support plate. The sliding rod extends through the inner wall of the support plate to both sides of the support plate. The sliding rod is slidably connected to the second sliding groove. The bottom of both the support plate and the rotating plate abuts against the top of the sealing ring. The support plate and the rotating plate are combined to form a flat plate with a central opening, and the size of the opening is adapted to the size of the support assembly. The first elastic airbag is fixedly connected to the inner wall of the placement cavity. The bottom of the first elastic airbag is directly fixedly connected to the top of the support plate and the rotating plate. The rotating plate is made of magnetic material, and the top of the rotating plate is provided with a hydrophobic coating.
[0011] By adopting the above technical solution, the support components are set up to facilitate the tilting of the composite board by ball bearings.
[0012] As an optional solution of the technical solution in this invention document, the sealing component includes a first sealing lip, a water-absorbing block, a barrier block and a second sealing lip disposed at the bottom of the sealing airbag, the top of the second sealing lip is provided with a first cavity, a second elastic airbag is disposed between the sealing airbag and the water-absorbing block, and a first ventilation groove is provided inside the sealing airbag. The water-absorbing block is located between the first sealing lip and the barrier block. The second sealing lip is located on the side of the barrier block away from the water-absorbing block. The first sealing lip is located on the side of the water-absorbing block near the opening. The top of the water-absorbing block abuts against the bottom of the second elastic airbag. The interior of the second elastic airbag is connected to the first cavity through the first ventilation groove. The water-absorbing block is made of water-absorbing and expanding material.
[0013] By adopting the above technical solution and setting up a sealing component, water can be prevented from seeping in from the side, thus ensuring the accuracy of the device's detection.
[0014] As an optional solution of the technical solution in this invention document, the limiting component includes a second ventilation groove and a second cavity disposed inside the sealing airbag. The second cavity is provided with a second elastic element and a first piston rod. A limiting block is fixedly connected to the bottom of the first piston rod. A liquid sensor is disposed at the bottom of the sealing airbag. The first piston rod is elastically connected to the inner wall of the second cavity through the second elastic element. The first piston rod extends through the inner wall of the second cavity to the bottom of the second cavity. The limiting block is located on the side of the second sealing lip away from the blocking block. The liquid sensor is located on the side of the limiting block away from the second sealing lip. The interior of the second cavity is connected to the interior of the second elastic airbag through the second venting groove.
[0015] By adopting the above technical solution, the limiting component can protect the second sealing ring and prevent it from expanding excessively.
[0016] As an optional solution of the technical solution in this invention document, the buffer assembly includes a third sliding groove opened on the top of the fixed seat, the fixed seat is provided with a plurality of third cavities, a lifting plate is slidably connected inside the third sliding groove, a second piston rod is fixedly connected to the bottom of the lifting plate, and a third elastic element is provided inside the third cavity. The third cavity is located below the third slide groove. The second piston rod extends through the inner wall of the third slide groove into the third cavity. The bottom of the second piston rod is elastically connected to the inner wall of the third cavity through a third elastic element. The top of the lifting plate abuts against the bottom of the first top plate, the second top plate, and the side top plate. The first top plate, the second top plate, and the side top plate are slidably connected to the inner wall of the third slide groove. The first top plate, the second top plate, and the two side top plates are staggered.
[0017] By adopting the above technical solution, a buffer component can be set up to cushion the top plate when it is pressed down.
[0018] As an optional solution to the technical solution of this invention, the transmission assembly includes a first transmission gear disposed on the side of the first gear and the second gear, a first rack meshing on the side of the first transmission gear, and three fourth sliding grooves opened inside the fixed base. The first rack is slidably connected to the fourth slide groove. The first rack is L-shaped. The bottoms of the first lifting rod and the second lifting rod are fixedly connected to different transmission components. The top of the first lifting rod is provided with an inclined surface. The three first transmission gears are meshed with the first gear and two second gears respectively on the side away from the first rack. The two second lifting rods are located below both ends of the support plate. The top of the first lifting rod passes through the sealing ring and abuts against the bottom of the support plate. The first rack extends through the inner wall of the fourth slide groove to the top of the fixed seat.
[0019] As an optional solution of the technical solution in this invention document, the tilting component includes a third gear fixedly connected to the second top plate, a second transmission gear meshing with the side of the third gear, a second rack meshing with the side of the second transmission gear away from the third gear, a fifth sliding groove and a rotating groove being provided inside the fixed base, a toothed disc being rotatably connected inside the rotating groove, and a magnetic suction rod being fixedly connected to the top of the toothed disc.
[0020] As an optional solution of the technical solution in this invention document, the second rack is slidably connected to the fifth slide groove, the side of the toothed disc meshes with the second rack, the toothed disc is located below the rotating plate, the top of the magnetic rod is magnetically connected to the bottom of the rotating plate through the sealing ring, the second transmission gear is located above the side of the third gear, and the second rack extends through the inner wall of the fifth slide groove to the top of the fixed seat.
[0021] By adopting the above technical solution, the transmission component and the tilting component are set up to cooperate, which facilitates the tilting of the support plate and the rotating plate, and cleans the water droplets hanging on the bottom of the composite plate.
[0022] Beneficial effects: One or more technical solutions provided in this invention have at least the following technical effects or advantages: 1. The system adopts a linkage structure of the first top plate, the second top plate, the gear rack, and the toothed disc. Simply rotating the top plate can achieve actions such as tilting the support plate, magnetic unlocking, and linkage of the rotating plate. No complicated manual operation is required. This ensures that the sample insertion and removal path is unobstructed, which is suitable for the high-efficiency requirements of industrial batch testing and greatly improves the testing efficiency.
[0023] 2. The inclined design of the support plate with the slide rod as the axis, combined with the magnetic fixing and unlocking linkage of the rotating plate, not only realizes convenient opening of the cover before testing and automatic tilting and bead discharge after testing, but also can accurately reset after the top plate is closed, ensuring the coaxiality deviation of the composite plate, the sealing airbag, and the water outlet pipe, laying a precise foundation for subsequent sealing and pressurization.
[0024] 3. Through the composite sealing structure of double-layer sealing lips, water-absorbing blocks, and elastic airbags, a triple protection of "basic sealing - emergency isolation - expansion compensation" is formed: the first sealing lip achieves initial sealing, the water-absorbing block absorbs water and expands when the first sealing lip fails, fills the gap and compresses the second elastic airbag, drives the second sealing lip to expand and strengthen the seal, blocks edge seepage from the source, avoids falsely high seepage volume caused by factors other than the board itself, avoids edge seepage, and ensures the authenticity of test data.
[0025] 4. In the above sealing structure, a double anti-over-expansion structure of barrier block and limit block is added: the barrier block prevents the water absorption block from over-expanding and hitting the second sealing lip, preventing the sealing lip from deforming and failing; the limit block moves out of support when the second sealing lip expands, which not only ensures the tightness of the sealing lip and the composite plate, but also prevents it from over-expanding and being damaged, thus extending the service life of the sealing component.
[0026] 5. A graded pressurization structure with hydraulic cylinder drive and first elastic element buffer is adopted: the slide plate first flexibly abuts against the composite plate, and then the elastic force of the elastic element applies downward pressure to avoid the composite plate fiber damage and adhesive layer peeling caused by rigid pressurization; at the same time, the pressure plate drives the top plate to compress the sealing airbag, so that the sealing airbag fits more tightly with the composite plate and sealing components, the sealing pressure is evenly distributed, and there is no local micro-leakage.
[0027] 6. After the test, the double bead-discharging structure with the support plate tilting and the rotating plate tilting downwards: the support plate drives the composite plate to tilt, causing the water droplets hanging on the bottom wall to converge towards the sliding rod, and the rotating plate tilts to guide the water droplets hanging on the wall to slide down the surface and be accurately discharged into the collection device through the outlet. This avoids the situation where the water droplets hanging on the bottom surface of the composite plate, which are difficult to detect, are not effectively collected after the test, resulting in low permeable water data and affecting the test results.
[0028] 7. At the same time, the inclined ball bearing structure is a non-contact structure for cleaning the water droplets formed on the wall during the testing of the composite board. It effectively avoids the problems of local deformation and unevenness caused by water seepage at the bottom of the composite board in traditional scraping structures, which can lead to the scraping components getting stuck with the board, causing operational jamming, or even damage to the device. This ensures that the water droplet cleaning action is smooth throughout the process and significantly improves the stability of the cleaning structure.
[0029] 8. Furthermore, the support plate drives the composite plate to tilt in the direction of the slide bar, and with the downward tilting guide of the rotating plate, the water droplets hanging on the bottom of the composite plate converge and slide down in a fixed direction, and finally are accurately discharged into the collection device through the outlet. This achieves directional and concentrated collection of water droplets hanging on the wall, avoiding spillage during the collection process and thus reducing the amount of infiltrated water, ensuring the accuracy and reliability of the test results. Attached Figure Description
[0030] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0031] Figure 1 This is a three-dimensional structural diagram of a device for testing the water resistance of wood fiber and straw fiber composite boards.
[0032] Figure 2 This is a schematic cross-sectional view of the main body of the testing device in the device for testing the water resistance of wood fiber and straw fiber composite boards.
[0033] Figure 3 A device for testing the water resistance of wood fiber and straw fiber composite boards Figure 2 Enlarged structural diagram at point A in the middle.
[0034] Figure 4 A device for testing the water resistance of wood fiber and straw fiber composite boards Figure 2 Enlarged structural diagram at point B.
[0035] Figure 5This is a schematic cross-sectional view of the transmission component in the device for testing the water resistance of wood fiber and straw fiber composite boards.
[0036] Figure 6 This is a schematic cross-sectional view of the support component in the device for testing the water resistance of wood fiber and straw fiber composite boards.
[0037] Figure 7 This is a schematic cross-sectional view of the buffer component in the device for testing the water resistance of wood fiber and straw fiber composite boards.
[0038] Figure 8 This is a three-dimensional structural diagram of the sealing component in the device for testing the water resistance of wood fiber and straw fiber composite boards.
[0039] Figure 9 This is a schematic diagram showing the structural relationship between the first top plate and the first gear in a device for testing the water resistance of wood fiber and straw fiber composite boards.
[0040] Figure 10 This is a three-dimensional structural diagram of the tilting component in the device for testing the water resistance of wood fiber and straw fiber composite boards.
[0041] The following are the labeling instructions in the diagram: 10. Detection device body; 101. Fixing base; 102. Placement cavity; 103. Water outlet pipe; 104. Pressurizer; 105. Water supply pipe; 106. Slide plate; 107. First elastic element; 108. Water outlet; 109. First slide groove; 11. Pressure plate; 12. First elastic airbag; 13. Support assembly; 131. Support plate; 132. Rotating plate; 133. Slide rod; 134. Second slide groove; 135. Sealing ring; 14. First top plate; 15. Second top plate; 16. Side top plate; 17. Sealing airbag; 18. Sealing assembly; 181. First sealing lip; 182. Water absorption block; 183. Barrier block; 184. Second sealing lip; 185. Second elastic airbag; 186. First ventilation groove; 187. First cavity; 19. Limiting assembly; 191. Second vent groove; 192. Second cavity; 193. Second elastic element; 194. First piston rod; 195. Limiting block; 196. Liquid sensor; 20. Buffer assembly; 201. Third slide groove; 202. Lifting plate; 203. Third cavity; 204. Third elastic element; 205. Second piston rod; 21. First gear; 22. Second gear; 23. Transmission assembly; 231. First transmission gear; 232. First rack; 233. Fourth slide groove; 24. First lifting rod; 25. Second lifting rod; 26. Inclining assembly; 261. Third gear; 262. Second transmission gear; 263. Second rack; 264. Fifth slide groove; 265. Rotating groove; 266. Toothless disc; 267. Magnetic suction rod. Detailed Implementation
[0042] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0043] In the description of this invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.
[0044] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or a link; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.
[0045] Reference Figures 1 to 10 This invention provides a device for testing the water resistance of wood fiber and straw fiber composite boards, including a sealing component. The device includes a main body 10, a support assembly 13 for supporting the composite board within the main body 10, a first elastic airbag 12 for wrapping the composite board above the support assembly 13, a first top plate 14, a second top plate 15, and two side top plates 16 for sealing the top of the main body 10, and sealing airbags 17 for sealing and pressing down on the composite board at the bottom of each of the first top plate 14, second top plate 15, and side top plates 16. Sealing components 18 for sealing the gap between the composite board and the sealing airbag 17 are provided on the sealing airbag 17, and a limiting component 19 for limiting the sealing component 18 is provided at the bottom of the sealing airbag 17. A pressure plate 11 for pressing down on the top plate is also provided on the main body 10. The tilting component includes a buffer assembly 20 disposed within the main body 10 of the detection device for lifting the top plate, a first gear 21 fixedly connected to the first top plate 14, a second gear 22 fixedly connected to the side top plate 16, a first lifting rod 24 disposed below the first top plate 14, a second lifting rod 25 disposed below the side top plate 16, a transmission assembly 23 disposed on the sides of both the first top plate 14 and the side top plate 16 for driving the first lifting rod 24 and the second lifting rod 25 upward, and a tilting component 26 disposed on the side of the second top plate 15.
[0046] Reference Figure 1 , Figure 2 and Figure 6 This invention provides a device for testing the water resistance of wood fiber and straw fiber composite boards. The main body 10 of the testing device includes a fixed base 101, a placement cavity 102 is provided inside the fixed base 101, a water outlet 108 is provided at the bottom of the fixed base 101, a water outlet pipe 103 is provided above the fixed base 101, a pressure booster 104 is provided at the top of the water outlet pipe 103, a water delivery pipe 105 is provided on the side of the pressure booster 104, a first sliding groove 109 is provided at the bottom of the side wall of the water outlet pipe 103, a sliding plate 106 is slidably connected to the first sliding groove 109, and a first elastic element 107 is provided inside the first sliding groove 109. The slide plate 106 is elastically connected to the inner wall of the first slide groove 109 via the first elastic member 107. The water outlet pipe 103 is located directly above the water outlet 108. The size of the water outlet 108 is larger than the size of the water outlet pipe 103. The pressure plate 11 is fixedly connected to the side wall of the water outlet pipe 103. The pressurizer 104, the water supply pipe 105, and the slide plate 106 are the same size. The pressurizer 104, the water supply pipe 105, and the slide plate 106 are respectively hinged to the top of the fixed base 101. The pressurizer 104, the water supply pipe 105, and the slide plate 106 are combined to form a flat plate with a central opening. The size of the opening is adapted to the size of the support assembly 13. The first elastic airbag 12 is fixedly connected to the inner wall of the placement cavity 102. The sealing airbag 17 is located above the first elastic airbag 12.
[0047] Reference Figures 2 to 10 This invention provides a device for testing the water resistance of wood fiber and straw fiber composite boards. The support component 13 includes a sealing ring 135 fixedly connected to the bottom of the inner wall of the placement cavity 102. A support plate 131 and a rotating plate 132 are arranged above the sealing ring 135. A sliding rod 133 is fixedly connected to the side of the rotating plate 132. A second sliding groove 134 is provided on the inner wall of the placement cavity 102. The support plate 131 is U-shaped. The rotating plate 132 is rotatably connected to the inner wall of the support plate 131. The sliding rod 133 extends through the inner wall of the support plate 131 to both sides of the support plate 131. The sliding rod 133 is slidably connected to the second sliding groove 134. The bottoms of the support plate 131 and the rotating plate 132 abut against the top of the sealing ring 135. The support plate 131 and the rotating plate 132 are combined to form a flat plate with a central opening. The size of the opening is adapted to the size of the support assembly 13. The first elastic airbag 12 is fixedly connected to the inner wall of the placement cavity 102. The bottom of the first elastic airbag 12 is directly fixedly connected to the top of the support plate 131 and the rotating plate 132. The rotating plate 132 is made of magnetic material, and the top of the rotating plate 132 is provided with a hydrophobic coating.
[0048] Reference Figure 2 , Figure 3 , Figure 8 and Figure 10 This invention provides a device for testing the water resistance of wood fiber and straw fiber composite boards. The sealing component 18 includes a first sealing lip 181, a water-absorbing block 182, a barrier block 183, and a second sealing lip 184 disposed at the bottom of the sealing airbag 17. A first cavity 187 is opened at the top of the second sealing lip 184. A second elastic airbag 185 is disposed between the sealing airbag 17 and the water-absorbing block 182. A first ventilation groove 186 is opened inside the sealing airbag 17. The water-absorbing block 182 is located between the first sealing lip 181 and the barrier block 183. The second sealing lip 184 is located on the side of the barrier block 183 away from the water-absorbing block 182. The first sealing lip 181 is located on the side of the water-absorbing block 182 near the opening. The top of the water-absorbing block 182 abuts against the bottom of the second elastic airbag 185. The interior of the second elastic airbag 185 is connected to the first cavity 187 through the first ventilation groove 186. The material of the water-absorbing block 182 is a water-absorbing and expanding material. The first sealing lip 181, the water-absorbing block 182, the barrier block 183 and the second sealing lip 184 all cover the bottom and one side of the sealing airbag 17. The four sealing airbags 17 are circumferentially distributed around the axis of the water outlet 108, so that the gap between the sealing airbags 17 can be sealed by the sealing assembly 18. The composite sealing structure of double-layer sealing lip, water-absorbing block 182 and second elastic airbag 185 forms a triple protection of "basic sealing - emergency isolation - expansion compensation": the first sealing lip 181 achieves initial sealing, the water-absorbing block 182 absorbs water and expands when the first sealing lip 181 fails, fills the gap and compresses the second elastic airbag 185, drives the second sealing lip 184 to expand and strengthen the seal, blocks edge seepage from the source, avoids falsely high seepage volume caused by factors other than the board itself, avoids edge seepage, and ensures the authenticity of test data.
[0049] Reference Figure 2 , Figure 3 , Figure 8 and Figure 10 This invention provides a device for testing the water resistance of wood fiber and straw fiber composite boards. The limiting component 19 includes a second ventilation groove 191 and a second cavity 192 disposed inside the sealed airbag 17. The second cavity 192 is provided with a second elastic element 193 and a first piston rod 194. The bottom of the first piston rod 194 is fixedly connected to a limiting block 195. The bottom of the sealed airbag 17 is provided with a liquid sensor 196. The first piston rod 194 is elastically connected to the inner wall of the second cavity 192 through the second elastic member 193. The first piston rod 194 extends through the inner wall of the second cavity 192 to the bottom of the second cavity 192. The limiting block 195 is located on the side of the second sealing lip 184 away from the blocking block 183. The liquid sensor 196 is located on the side of the limiting block 195 away from the second sealing lip 184. The interior of the second cavity 192 is connected to the interior of the second elastic airbag 185 through the second venting groove 191.
[0050] Reference Figures 6 to 8 This invention provides a device for testing the water resistance of wood fiber and straw fiber composite boards. The buffer assembly 20 includes a third slide groove 201 opened on the top of the fixed base 101. The fixed base 101 is provided with a plurality of third cavities 203. A lifting plate 202 is slidably connected inside the third slide groove 201. A second piston rod 205 is fixedly connected to the bottom of the lifting plate 202. A third elastic element 204 is provided inside the third cavity 203. The third cavity 203 is located below the third slide groove 201. The second piston rod 205 extends through the inner wall of the third slide groove 201 into the third cavity 203. The bottom of the second piston rod 205 is elastically connected to the inner wall of the third cavity 203 through the third elastic element 204. The top of the lifting plate 202 abuts against the bottom of the first top plate 14, the second top plate 15 and the side top plate 16. The first top plate 14, the second top plate 15 and the side top plate 16 are slidably connected to the inner wall of the third slide groove 201. The first top plate 14, the second top plate 15 and the two side top plates 16 are staggered.
[0051] Reference Figures 2 to 10 This invention provides a device for testing the water resistance of wood fiber and straw fiber composite boards. The transmission component 23 includes a first transmission gear 231 disposed on the side of the first gear 21 and the second gear 22. A first rack 232 meshes with the side of the first transmission gear 231. The fixed base 101 has three fourth sliding grooves 233 inside. The first rack 232 is slidably connected to the fourth slide groove 233. The first rack 232 is L-shaped. The bottoms of the first lifting rod 24 and the second lifting rod 25 are fixedly connected to different transmission components 23. The top of the first lifting rod 24 is provided with an inclined surface. The three first transmission gears 231 are meshed with the first gear 21 and the two second gears 22 on the side away from the first rack 232, respectively. The two second lifting rods 25 are located below both ends of the support plate 131. The top of the first lifting rod 24 passes through the sealing ring 135 and abuts against the bottom of the support plate 131. The first rack 232 extends through the inner wall of the fourth slide groove 233 to the top of the fixed seat 101.
[0052] Reference Figure 9 and Figure 10 This invention provides a device for testing the water resistance of wood fiber and straw fiber composite boards. The tilting component 26 includes a third gear 261 fixedly connected to the second top plate 15. A second transmission gear 262 meshes with the side of the third gear 261. A second rack 263 meshes with the side of the second transmission gear 262 away from the third gear 261. A fifth sliding groove 264 and a rotating groove 265 are provided inside the fixed base 101. A toothed disc 266 is rotatably connected inside the rotating groove 265. A magnetic suction rod 267 is fixedly connected to the top of the toothed disc 266. The second rack 263 is slidably connected to the fifth slide groove 264. The side of the toothed disc 266 meshes with the second rack 263. The toothed disc 266 is located below the rotating plate 132. The top of the magnetic rod 267 passes through the sealing ring 135 and is magnetically connected to the bottom of the rotating plate 132. The second transmission gear 262 is located above the side of the third gear 261. The second rack 263 passes through the inner wall of the fifth slide groove 264 and extends to the top of the fixed seat 101. Meanwhile, the tilting ball bearing structure is a non-contact wall-mounted water droplet cleaning design, which effectively avoids the problems of local deformation and unevenness caused by water seepage at the bottom of the composite board in traditional scraping structures, which can lead to the scraping components getting stuck between the board and the board, causing operational jamming or even damage to the device. This ensures that the wall-mounted water droplet cleaning action is smooth throughout and significantly improves the stability of the cleaning structure.
[0053] This invention provides a device for testing the water resistance of wood fiber and straw fiber composite boards. Its working principle and usage procedure are as follows: First, the first top plate 14 is rotated upwards. This rotation drives the first transmission gear 231, which in turn rotates via the first gear 21. The rotation of the first transmission gear 231 causes the first rack 232 to move upwards within the fourth slide groove 233, thereby causing the first lifting rod 24 below the first top plate 14 to move upwards. This lifts the end of the support plate 131 away from the slide rod 133, causing the support plate 131 to tilt upwards about the slide rod 133 as its axis. The rotating plate 132 is magnetically fixed by the magnetic rod 267, preventing it from moving with the support plate. As 131 rotates, the second top plate 15 rotates upward, which in turn drives the second transmission gear 262 to rotate via the third gear 261. The rotation of the second transmission gear 262 drives the second rack 263, which meshes with it, to move upward. The upward movement of the second rack 263 drives the toothed disc 266, which meshes with it, to rotate, thereby driving the magnetic suction rod 267 downward. The downward pressure releases the magnetic attraction between the magnetic suction rod 267 and the rotating plate 132, causing the support plate 131 to drive the rotating plate 132 upward together and compress the first elastic airbag 12. At this point, the top of the fixing seat 101 is opened. Simply place the pre-treated, cut, edge-sanded, surface-cleaned, moisture-balanced, and edge-sealed wood fiber and straw fiber composite board into the placement cavity 102, positioning it above the support plate 131. Then, close the first top plate 14, the second top plate 15, and the side top plate 16 again, causing the support plate 131 to return to its original position. Figure 2 The position shown indicates that the composite plate is positioned between the sealing airbag 17 and the rotating plate 132. At this time, the bottom of the sealing airbag 17 is in contact with the top of the composite plate, the bottom of the support plate 131 is in contact with the top of the sealing ring 135, and a collection device for collecting seepage water is provided below the outlet 108. Subsequently, the hydraulic cylinder at the top of the pressure booster 104 drives the pressure booster 104 downward, causing the slide plate 106 at the bottom of the water outlet pipe 103 to move closer to the composite board. During this process, the slide plate 106 will first abut against the top of the composite board, and at this time, the bottom of the pressure plate 11 will move to abut against the top of the first top plate 14, the second top plate 15, and the side top plate 16. At this time, the water outlet pipe 103 continues to descend, causing the slide plate 106 to slide upward in the first slide groove 109, compressing the first elastic element 107, so that the slide plate 106 applies downward pressure to the composite board through the elastic force of the first elastic element 107. The pressure plate 11 will also drive the top plate to descend inside the third slide groove 201, compressing the sealing airbag 17 and making the bottom of the sealing airbag 17 and the sealing assembly 18 more compact. The top of the composite plate is attached to enhance the sealing between the sealing airbag 17 and the composite plate, as well as between the sealing airbags 17 and each other. The sealing airbag 17 will also wrap around the water outlet pipe 103 located above the composite plate. During this process, the top plate will press down on the lifting plate 202, causing the second piston rod 205 to descend and compress the third elastic element 204. The first top plate 14 and the side top plate 16 will descend and drive the first lifting rod 24 and the second lifting rod 25 to be retracted into the fourth sliding groove 233 through transmission. The second top plate 15 will descend and cause the second transmission gear 262 and the third gear 261 to disengage directly, avoiding the first lifting rod 24, the second lifting rod 25 and the magnetic suction rod 267 from providing rigid support to the support plate 131 and the rotating plate 132 when the device presses down on the composite plate. Then, the pressurizer 104 is activated so that the water transported in the water supply pipe 105 is pressurized by the pressurizer 104 and injected into the water outlet pipe 103. The water accumulates in the water outlet pipe 103, and the hydraulic pressure gradually increases. Each pressure is maintained for a set time until the critical seepage pressure is detected. During this process, the water at the top of the sample will seep vertically downwards along the pores of the composite plate body in a one-way direction. The seeped water will fall unobstructed through the water outlet pipe 103 into the cone-shaped anti-splash water collection tank below. The seepage volume is then continuously measured in real time by the weighing sensor at the bottom of the water collection tank. When the first sealing lip 181 fails, water will seep through it to the water-absorbing block 182, where it will be absorbed. The water-absorbing block 182 will expand, further compressing the gap between the sealing airbag 17 and the composite plate. Simultaneously, the expansion of the water-absorbing block 182 will compress the second elastic airbag 185, allowing gas from the second elastic airbag 185 to enter the first cavity 187 and the second cavity 192 through the first venting groove 186 and the second venting groove 191, respectively. This causes the second sealing lip 184 to expand and push the first piston rod 194, causing the limiting block 195 to move out of the sealing airbag 17 and support the second sealing lip 184. The limiting block 185 prevents the second sealing lip 184 from over-expanding and keeps it sealed. The blocking block 183 prevents the water-absorbing block 182 from over-expanding and deforming against the second sealing lip 184, thus affecting its sealing performance. When water breaks through the water-absorbing block 182, the second sealing lip 184, and the limiting block 195, it will be detected by the liquid sensor 196 and an alarm will be triggered. At this time, it is necessary to contact the detection and replace the sealing assembly 18 to prevent water from seeping into the collection device from the edge and affecting the detection data results. During the process of opening the device at the end of the test, the upward tilt of the support plate 131 will cause the top composite plate to tilt within the placement cavity 102, causing the water droplets hanging on the bottom of the composite plate to slide towards the slide rod 133. Meanwhile, the downward tilt of the rotating plate 132 will cause the water droplets that fall onto the surface of the rotating plate 132 to slide down along the tilted surface of the rotating plate 132 and be discharged from the outlet 108 into the collection device. This avoids the situation where the water droplets hanging on the wall cause inaccurate permeable water data to be collected, thus affecting the test results.
[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims
1. A device for testing the water resistance of wood fiber and straw fiber composite boards, characterized in that: include A sealing component includes a detection device body, within which a support assembly for supporting a composite panel is disposed. Above the support assembly is a first elastic airbag for wrapping the composite panel. The detection device body is provided with a first top plate, a second top plate, and two side top plates for sealing. At the bottom of the first top plate, the second top plate, and the side top plates, sealing airbags for sealing and pressing down on the composite panel are disposed. Sealing assemblies for sealing the gap between the composite panel and the sealing airbags are disposed on the sealing airbags. A limiting assembly for limiting the sealing assembly is disposed at the bottom of the sealing airbags. A pressure plate for pressing down on the top plate is disposed on the detection device body. The tilting component includes a buffer assembly disposed within the main body of the detection device for lifting the top plate. A first gear is fixedly connected to the first top plate, and a second gear is fixedly connected to the side top plate. A first lifting rod is disposed below the first top plate, and a second lifting rod is disposed below the side top plate. Both the first top plate and the side top plate are provided with transmission assemblies for driving the first and second lifting rods upward. The tilting component is disposed on the side of the second top plate.
2. The device for testing the water resistance of wood fiber and straw fiber composite boards according to claim 1, characterized in that: The main body of the detection device includes a fixed base, the fixed base has a placement cavity inside, the bottom of the fixed base has a water outlet, the top of the fixed base has a water outlet pipe, the top of the water outlet pipe has a pressure booster, the side of the pressure booster has a water delivery pipe, the bottom of the side wall of the water outlet pipe has a first sliding groove, a sliding plate is slidably connected to the first sliding groove, and the inside of the first sliding groove has a first elastic element.
3. The device for testing the water resistance of wood fiber and straw fiber composite boards according to claim 2, characterized in that: The slide plate is elastically connected to the inner wall of the first slide groove through the first elastic element. The water outlet pipe is located directly above the water outlet, and the size of the water outlet is larger than the size of the water outlet pipe. The pressure plate is fixedly connected to the side wall of the water outlet pipe. The pressure booster, water supply pipe, and slide plate are of the same size. The pressure booster, water supply pipe, and slide plate are respectively hinged to the top of the fixed base. The pressure booster, water supply pipe, and slide plate are combined to form a flat plate with a central opening, and the size of the opening is adapted to the size of the support assembly. The first elastic airbag is fixedly connected to the inner wall of the placement cavity, and the sealing airbag is located above the first elastic airbag.
4. The device for testing the water resistance of wood fiber and straw fiber composite boards according to claim 2, characterized in that: The support assembly includes a sealing ring fixedly connected to the bottom of the inner wall of the placement cavity, a support plate and a rotating plate are provided above the sealing ring, a sliding rod is fixedly connected to the side of the rotating plate, and a second sliding groove is provided on the inner wall of the placement cavity. The support plate is U-shaped. The rotating plate is rotatably connected to the inner wall of the support plate. The sliding rod extends through the inner wall of the support plate to both sides of the support plate. The sliding rod is slidably connected to the second sliding groove. The bottom of both the support plate and the rotating plate abuts against the top of the sealing ring. The support plate and the rotating plate are combined to form a flat plate with a central opening, and the size of the opening is adapted to the size of the support assembly. The first elastic airbag is fixedly connected to the inner wall of the placement cavity. The bottom of the first elastic airbag is directly fixedly connected to the top of the support plate and the rotating plate. The rotating plate is made of magnetic material, and the top of the rotating plate is provided with a hydrophobic coating.
5. The device for testing the water resistance of wood fiber and straw fiber composite boards according to claim 1, characterized in that: The sealing assembly includes a first sealing lip, a water-absorbing block, a barrier block, and a second sealing lip disposed at the bottom of the sealing airbag. A first cavity is provided at the top of the second sealing lip. A second elastic airbag is disposed between the sealing airbag and the water-absorbing block. A first ventilation groove is provided inside the sealing airbag. The water-absorbing block is located between the first sealing lip and the barrier block. The second sealing lip is located on the side of the barrier block away from the water-absorbing block. The first sealing lip is located on the side of the water-absorbing block near the opening. The top of the water-absorbing block abuts against the bottom of the second elastic airbag. The interior of the second elastic airbag is connected to the first cavity through the first ventilation groove. The water-absorbing block is made of water-absorbing and expanding material.
6. The device for testing the water resistance of wood fiber and straw fiber composite boards according to claim 5, characterized in that: The limiting component includes a second ventilation groove and a second cavity disposed inside the sealing airbag. The second cavity is provided with a second elastic element and a first piston rod. A limiting block is fixedly connected to the bottom of the first piston rod. A liquid sensor is disposed at the bottom of the sealing airbag. The first piston rod is elastically connected to the inner wall of the second cavity through the second elastic element. The first piston rod extends through the inner wall of the second cavity to the bottom of the second cavity. The limiting block is located on the side of the second sealing lip away from the blocking block. The liquid sensor is located on the side of the limiting block away from the second sealing lip. The interior of the second cavity is connected to the interior of the second elastic airbag through the second venting groove.
7. The device for testing the water resistance of wood fiber and straw fiber composite boards according to claim 2, characterized in that: The buffer assembly includes a third slide groove opened on the top of the fixed base, the fixed base is provided with a plurality of third cavities, a lifting plate is slidably connected inside the third slide groove, a second piston rod is fixedly connected to the bottom of the lifting plate, and a third elastic element is provided inside the third cavity; The third cavity is located below the third slide groove. The second piston rod extends through the inner wall of the third slide groove into the third cavity. The bottom of the second piston rod is elastically connected to the inner wall of the third cavity through a third elastic element. The top of the lifting plate abuts against the bottom of the first top plate, the second top plate, and the side top plate. The first top plate, the second top plate, and the side top plate are slidably connected to the inner wall of the third slide groove. The first top plate, the second top plate, and the two side top plates are staggered.
8. The device for testing the water resistance of wood fiber and straw fiber composite boards according to claim 7, characterized in that: The transmission assembly includes a first transmission gear disposed on the side of the first gear and the second gear, a first rack meshing on the side of the first transmission gear, and three fourth sliding grooves opened inside the fixed base. The first rack is slidably connected to the fourth slide groove. The first rack is L-shaped. The bottoms of the first lifting rod and the second lifting rod are fixedly connected to different transmission components. The top of the first lifting rod is provided with an inclined surface. The three first transmission gears are meshed with the first gear and two second gears respectively on the side away from the first rack. The two second lifting rods are located below both ends of the support plate. The top of the first lifting rod passes through the sealing ring and abuts against the bottom of the support plate. The first rack extends through the inner wall of the fourth slide groove to the top of the fixed seat.
9. The device for testing the water resistance of wood fiber and straw fiber composite boards according to claim 8, characterized in that: The tilting assembly includes a third gear fixedly connected to the second top plate. A second transmission gear meshes with the side of the third gear. A second rack meshes with the side of the second transmission gear away from the third gear. A fifth sliding groove and a rotating groove are provided inside the fixed base. A toothed disc is rotatably connected inside the rotating groove. A magnetic suction rod is fixedly connected to the top of the toothed disc.
10. The device for testing the water resistance of wood fiber and straw fiber composite boards according to claim 9, characterized in that: The second rack is slidably connected to the fifth slide groove, the side of the toothed disc meshes with the second rack, the toothed disc is located below the rotating plate, the top of the magnetic rod is magnetically connected to the bottom of the rotating plate through the sealing ring, the second transmission gear is located above the side of the third gear, and the second rack extends through the inner wall of the fifth slide groove to the top of the fixed seat.