A device for detecting the waterproof performance of building engineering materials

Abstract

The present invention relates to the technical field of detection devices, and discloses a waterproof performance detection device for building engineering materials, including a base. A column is fixedly installed on the upper surface of the base. A rotating shaft is rotatably installed between the inner walls at the top of the column. A rotating block is fixedly installed on the outer surface of the rotating shaft. The other end of the rotating block is fixedly installed with a placement plate, and two limiting grooves are symmetrically formed on the upper surface of the placement plate. Since the elastic force of the second spring is determined in the present invention, the increased weight of the waterproof wooden board relative to before being soaked is determined. By measuring the time required for the waterproof wooden board to absorb the same weight of water, the waterproof performance of the waterproof wooden board can be obtained. When testing the waterproof performance of the waterproof wooden board through this device, the testing process is simple and the accuracy of the tested data is high.

Description

Technical Field

[0001] The present invention relates to the technical field of detection devices, and particularly to a detection device for the waterproof performance of building engineering materials. Background Art

[0002] Building materials are various materials used in construction projects. There are many types of building materials, which can be roughly divided into: inorganic materials, including metallic materials (including ferrous metallic materials and non-ferrous metallic materials) and non-metallic materials (such as natural stones, fired clay products, cement, concrete, and silicate products, etc.); organic materials, including plant-based materials, synthetic polymer materials (including plastics, coatings, adhesives), and asphalt materials; composite materials, including asphalt concrete, polymer concrete, etc., which are generally composed of inorganic non-metallic materials and organic materials. Among them, wooden building materials will be decorated and coated with a waterproof layer on the surface before use, and the waterproof performance of wooden materials will be tested before leaving the factory.

[0003] An existing testing device for the waterproof performance of building materials (Publication No.: CN114894694A) has at least the following drawbacks:

[0004] When the above patent is used, the operator adsorbs the device to the surface of the wooden building material through a suction cup, and then sprays water on the wooden material simultaneously through the inclined water spray head, side water spray head, and top water spray brush provided by the bottom surface spraying mechanism. Then, the humidity is detected through a humidity detection probe. In the above patent, the humidity detection probe and the water spray nozzle are both located inside the same space, and the water mist sprayed by the nozzle will float in the air, resulting in errors when the humidity detection probe detects the humidity, making the data of the waterproof performance detection of the wooden building material inaccurate. Summary of the Invention

[0005] The purpose of the present invention is to solve the drawbacks existing in the prior art, and to propose a detection device for the waterproof performance of building engineering materials.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A waterproof performance detection device for building engineering materials, comprising a base. A column is fixedly installed on the upper surface of the base. A rotating shaft is rotatably installed between the inner walls at the top of the column. A rotating block is fixedly installed on the outer surface of the rotating shaft. The other end of the rotating block is fixedly installed with a placement plate. Two limiting grooves are symmetrically formed on the upper surface of the placement plate. A waterproof wooden board is slidably inserted between the inner walls of the two limiting grooves. A dovetail chute is formed on the upper surface at the middle position of the placement plate. A dovetail slide rail is slidably installed in the inner wall of the dovetail chute. A limiting plate is fixedly installed on the outer surface of the dovetail slide rail near the bottom end. The bottom end of the waterproof wooden board abuts against the upper surface of the limiting plate. An L-shaped rod is fixedly installed at the top end of the dovetail slide rail. A pressing column is fixedly installed on the lower surface of the top end of the L-shaped rod. A second spring is sleeved on the outer surface of the pressing column. The top end of the second spring is fixedly connected to the lower surface of the L-shaped rod. The bottom end of the second spring is fixedly connected to the top end of the placement plate. A pressure sensor is fixedly installed at the top end of the placement plate. The pressure sensor is arranged directly below the pressing column.

[0008] As a further scheme of the present invention, limiting sliding sleeves are fixedly installed on the outer surfaces of the opposite sides of the placement plate. A square sliding rod is slidably installed in the inner wall of the limiting sliding sleeve. A rack is fixedly installed at the bottom end of the square sliding rod. A water receiving box is rotatably installed between the bottom ends of the two racks. The water receiving box is arranged directly below the waterproof wooden board. Blocks are fixedly installed on the outer surfaces of the opposite sides of the placement plate.

[0009] As a further scheme of the present invention, a sliding column is fixedly installed at the top end of the square sliding rod. The bottom end of the sliding column penetrates through the outer surface of the limiting sliding sleeve and is slidably installed therewith. The bottom end of the sliding column abuts against the upper surface of the block. A first spring is sleeved on the outer surface of the sliding column. The top end of the first spring is fixedly connected to the lower surface at the top of the square sliding rod. The bottom end of the first spring is fixedly connected to the upper surface of the limiting sliding sleeve. Two pull ropes are symmetrically and fixedly installed on the upper surface of the water receiving box. The top ends of the two pull ropes are fixedly connected to the bottom end of the placement plate.

[0010] As a further scheme of the present invention, a group of support blocks are fixedly installed in pairs on the outer surfaces of the opposite sides of the placement plate. A group of two support blocks are arranged above the rack. A limiting sliding rod is fixedly installed between the two support blocks in a group. Sliding sleeves are slidably installed on the outer surfaces of the two limiting sliding rods. A cross bar is fixedly installed between the two sliding sleeves. A rubber scraping piece is fixedly installed on the lower surface of the cross bar. The bottom of the rubber scraping piece abuts against the upper surface of the waterproof wooden board.

[0011] As a further solution of the present invention, a set of pulleys are rotatably installed in pairs on the outer surfaces of the opposite sides of the placement plate. A belt is sleeved on the outer surfaces of the two pulleys in a set. The bottom end of the sliding sleeve is fixedly connected to the upper surface of the belt. A gear is fixedly installed at one end of the pulley close to the rack. The gear meshes with the rack. The gear is arranged below the rack. Electromagnets are fixedly installed on the outer surfaces of the placement plate close to the tops of the two square sliding rods. An iron block is fixedly installed at the top end of the square sliding rod.

[0012] As a further solution of the present invention, the fulcrum of the water storage box rotatably installed with the rack is arranged on the outer surface of the two ends of the water storage box far from the pull rope. Limit blocks are fixedly installed on the end faces of the opposite ends of the water storage box. The limit blocks are arranged on the side of the rack far from the pull rope and abut against its outer surface. The limit blocks are arranged above the fulcrum of the water storage box rotatably installed with the rack.

[0013] As a further solution of the present invention, an electric telescopic rod is rotatably installed on the outer surface of the column close to the placement plate. The telescopic end of the electric telescopic rod is rotatably installed on the lower surface of the placement plate close to the bottom end. One end of the rotating shaft penetrates through the outer surface of the column and is fixedly installed with a pointer. A scale is arranged on the outer surface of the column close to the pointer.

[0014] As a further solution of the present invention, rotating arms are fixedly installed on the end faces of the two ends of the rotating shaft. A water spraying pipe is fixedly installed between the outer surfaces of the two rotating arms close to the top ends. A plurality of nozzles are fixedly installed at equal intervals on the outer surface of the water spraying pipe. The nozzles are arranged above the waterproof wooden board. A water pipe joint is fixedly installed on the outer surface of the water spraying pipe. The water pipe joint is communicated with the nozzles through the water spraying pipe.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. Since the elastic force of the second spring is determined, the increased weight of the waterproof wooden board relative to before being soaked is determined. By calculating how much time is required for the waterproof wooden board to absorb the same weight of water, the waterproof performance of the waterproof wooden board can be obtained. When testing the waterproof performance of the waterproof wooden board with this device, the testing process is simple and the accuracy of the test data is high;

[0017] 2. By controlling the extension and retraction movements of the telescopic end of the electric telescopic rod, the placement plate is driven to rotate around the rotating shaft, and the pointer is driven to rotate by the rotating shaft, so that the pointer points to the corresponding position on the dial. Then, the waterproof wooden board with a fixed size after cutting is inserted into the inside of the limit groove, and the bottom end of the waterproof wooden board abuts against the upper surface of the limit plate. Through this device, the inclination angle of the waterproof wooden board can be adjusted to simulate different angles of the waterproof wooden board in actual installation. Since the residence time of rainwater is different at different angles, the waterproof effect of the waterproof wooden board will also vary greatly, which increases the practicability of the detection device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is the overall structural schematic diagram of a waterproof performance detection device for building engineering materials proposed by the present invention;

[0019] Figure 2 is the left-view structural schematic diagram of a waterproof performance detection device for building engineering materials proposed by the present invention;

[0020] Figure 3 is the top-view structural schematic diagram of a waterproof performance detection device for building engineering materials proposed by the present invention;

[0021] Figure 4 is the schematic diagram of the placement plate of a waterproof performance detection device for building engineering materials proposed by the present invention;

[0022] Figure 5 is the left-view schematic diagram of the placement plate of a waterproof performance detection device for building engineering materials proposed by the present invention;

[0023] Figure 6 is the schematic diagram of the dovetail chute of a waterproof performance detection device for building engineering materials proposed by the present invention;

[0024] Figure 7 is the schematic diagram of the rack of a waterproof performance detection device for building engineering materials proposed by the present invention;

[0025] Figure 8 is Figure 5 the partial enlarged schematic diagram at A in

[0026] Figure 9 is Figure 5 the partial enlarged schematic diagram at B in

[0027] In the figure: 1, base; 2, vertical column; 3, rotating block; 4, placing plate; 401, limiting groove; 402, dovetail chute; 403, dovetail slide rail; 404, limiting plate; 5, rotating arm; 6, water spray pipe; 7, nozzle; 8, water pipe joint; 9, dial; 10, pointer; 11, electric telescopic rod; 12, waterproof wooden board; 13, supporting block; 14, limiting slide bar; 15, sliding sleeve; 16, cross bar; 17, rubber wiper; 18, pulley; 19, belt; 20, gear; 21, limiting sliding sleeve; 22, stop block; 23, rack; 24, sliding column; 25, first spring; 26, electromagnet; 27, iron block; 28, water receiving box; 29, pulling rope; 30, limiting block; 31, L-shaped rod; 32, pressing column; 33, pressure sensor; 34, second spring. Detailed implementation manner

[0028] In order to make the technical means, creative features, achieved purposes and functions of the present invention easy to understand, the present invention will be further described below in conjunction with the specific implementation manners.

[0029] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0030] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "provided with", "connection", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0031] Refer to Figures 1-9, a waterproof performance detection device for building engineering materials, comprising a base 1. A column 2 is fixedly installed on the upper surface of the base 1. A rotating shaft is rotatably installed between the inner walls at the top of the column 2. A rotating block 3 is fixedly installed on the outer surface of the rotating shaft. The other end of the rotating block 3 is fixedly installed with a placing plate 4. Two limiting grooves 401 are symmetrically formed on the upper surface of the placing plate 4. A waterproof wooden board 12 is slidably inserted between the inner walls of the two limiting grooves 401. A dovetail chute 402 is formed on the upper surface at the middle position of the placing plate 4. A dovetail slide rail 403 is slidably installed in the inner wall of the dovetail chute 402. A limiting plate 404 is fixedly installed on the outer surface of the dovetail slide rail 403 near the bottom end. The bottom end of the waterproof wooden board 12 abuts against the upper surface of the limiting plate 404. An L-shaped rod 31 is fixedly installed at the top end of the dovetail slide rail 403. A pressing column 32 is fixedly installed on the lower surface of the top end of the L-shaped rod 31. A second spring 34 is sleeved on the outer surface of the pressing column 32. The top end of the second spring 34 is fixedly connected to the lower surface of the L-shaped rod 31. The bottom end of the second spring 34 is fixedly connected to the top end of the placing plate 4. A pressure sensor 33 is fixedly installed at the top end of the placing plate 4. The pressure sensor 33 is arranged directly below the pressing column 32.

[0032] As the time of the waterproof wooden board 12 being watered increases, part of the water will be slowly absorbed into the interior of the waterproof wooden board 12, causing the weight of the waterproof wooden board 12 to gradually increase. When the weight of the waterproof wooden board 12 increases, it will drive the dovetail slide rail 403 to slide downward through the limiting plate 404. The dovetail slide rail 403 drives the pressing column 32 to move downward through the L-shaped rod 31. When the pressing column 32 moves down to contact the pressure sensor 33, an electrical signal will be emitted. The water pump will stop through the electrical signal, so that the nozzle 7 stops spraying water. The operator takes out the waterproof wooden board 12. Since the elastic force of the second spring 34 is determined, the increased weight of the waterproof wooden board 12 relative to before being soaked is determined. By knowing how much time is required for the waterproof wooden board 12 to absorb the same weight of water, the waterproof performance of the waterproof wooden board 12 can be obtained. When testing the waterproof performance of the waterproof wooden board 12 with this device, the testing process is simple and the accuracy of the tested data is high.

[0033] In this embodiment, limiting sliding sleeves 21 are fixedly installed on the outer surfaces of the opposite sides of the placing plate 4. A square sliding rod is slidably installed on the inner wall of the limiting sliding sleeve 21. A rack 23 is fixedly installed at the bottom end of the square sliding rod. A water receiving box 28 is rotatably installed between the bottom ends of the two racks 23. The water receiving box 28 is arranged directly below the waterproof wooden board 12. Stopping blocks 22 are fixedly installed on the outer surfaces of the opposite sides of the placing plate 4. A sliding column 24 is fixedly installed at the top end of the square sliding rod. The bottom end of the sliding column 24 penetrates through the outer surface of the limiting sliding sleeve 21 and is slidably installed therewith. The bottom end of the sliding column 24 abuts against the upper surface of the stopping block 22. A first spring 25 is sleeved on the outer surface of the sliding column 24. The top end of the first spring 25 is fixedly connected to the lower surface of the top of the square sliding rod. The bottom end of the first spring 25 is fixedly connected to the upper surface of the limiting sliding sleeve 21. Two pulling ropes 29 are symmetrically and fixedly installed on the upper surface of the water receiving box 28. The top ends of the two pulling ropes 29 are both fixedly connected to the bottom end of the placing plate 4. The pivot point of the rotational installation of the water receiving box 28 and the rack 23 is arranged on the outer surface of the two ends of the water receiving box 28 far away from the pulling ropes 29. Limiting blocks 30 are fixedly installed on the opposite end faces of the water receiving box 28. The limiting blocks 30 are arranged on the side of the rack 23 far away from the pulling ropes 29 and abut against its outer surface. The limiting blocks 30 are arranged above the pivot point of the rotational installation of the water receiving box 28 and the rack 23.

[0034] When the water receiving box 28 moves downward until the pulling ropes 29 are completely straightened, due to inertia, the water receiving box 28 will continue to move downward. At this time, under the action of the pulling ropes 29, the water receiving box 28 is driven to rotate, so that the water received inside the water receiving box 28 is drained obliquely, facilitating the reset movement of the water receiving box 28. The rotational pivot point of the water receiving box 28 is deviated from the center of gravity position, so that it will reset again under its own gravity.

[0035] In this embodiment, electromagnets 26 are fixedly installed on the outer surfaces of the placing plate 4 near the tops of the two square sliding rods. Iron blocks 27 are fixedly installed at the top ends of the square sliding rods. A set of two supporting blocks 13 are fixedly installed in pairs on the outer surfaces of the opposite sides of the placing plate 4. The set of two supporting blocks 13 is arranged above the rack 23. A limiting sliding rod 14 is fixedly installed between the set of two supporting blocks 13. Sliding sleeves 15 are slidably installed on the outer surfaces of the two limiting sliding rods 14. A cross bar 16 is fixedly installed between the two sliding sleeves 15. A rubber scraping blade 17 is fixedly installed on the lower surface of the cross bar 16. The bottom of the rubber scraping blade 17 abuts against the upper surface of the waterproof wooden board 12. A set of two belt pulleys 18 are rotatably installed in pairs on the outer surfaces of the opposite sides of the placing plate 4. A belt 19 is sleeved on the outer surfaces of the set of two belt pulleys 18. The bottom end of the sliding sleeve 15 is fixedly connected to the upper surface of the belt 19. A gear 20 is fixedly installed at one end of the belt pulley 18 close to the rack 23. The gear 20 meshes with the rack 23. The gear 20 is arranged below the rack 23.

[0036] The electromagnet 26 is demagnetized by an electric signal, so that the iron block 27 is released from the attraction of the electromagnet 26. The water-containing box 28 drives the rack 23 to slide downward, the rack 23 drives the gear 20 to rotate, the gear 20 drives the belt pulley 18 to rotate, and the belt pulley 18 drives the sliding sleeve 15 to slide downward along the outer surface of the limit slide bar 14 through the belt 19. The sliding sleeve 15 drives the rubber wiper 17 to move downward through the cross bar 16 to scrape the residual water on the upper surface of the waterproof wooden board 12 clean. By this device, the weight of the residual water on the surface of the waterproof wooden board 12 is prevented from affecting the water absorbed by the waterproof wooden board 12. When the water is scraped clean and the increased weight of the waterproof wooden board 12 is not enough, the pressure column 32 will leave the pressure sensor 33. At this time, water will be sprayed out again from the nozzle 7. Since the waterproof wooden board 12 is vertical or inclined, the residual water on its surface is less.

[0037] In this embodiment, an electric telescopic rod 11 is rotatably installed on the outer surface of the column 2 close to one side of the placement plate 4. The telescopic end of the electric telescopic rod 11 is rotatably installed on the lower surface of the placement plate 4 close to the bottom end. One end of the rotating shaft penetrates through the outer surface of the column 2 and is fixedly installed with a pointer 10. A scale disk 9 is arranged on the outer surface of the column 2 close to one side of the pointer 10.

[0038] By controlling the extension and retraction movement of the telescopic end of the electric telescopic rod 11, the placement plate 4 is driven to rotate around the rotating shaft, the pointer 10 is driven to rotate through the rotating shaft, so that the pointer 10 points to the corresponding position on the scale disk 9. Then, the waterproof wooden board 12 with a fixed size after cutting is inserted into the inside of the limit groove 401. The bottom end of the waterproof wooden board 12 abuts against the upper surface of the limit plate 404. By this device, the inclination angle of the waterproof wooden board 12 can be adjusted to simulate different angles of the waterproof wooden board 12 in actual installation. Since the residence time of rainwater is different at different angles, the waterproof effect of the waterproof wooden board 12 will also vary greatly, increasing the practicability of the detection device.

[0039] In this embodiment, rotating arms 5 are fixedly installed on the end faces of the two ends of the rotating shaft close to the rotation centers. A water spray pipe 6 is fixedly installed between the outer surfaces of the two rotating arms 5 close to the top ends. A plurality of nozzles 7 are fixedly installed on the outer surface of the water spray pipe 6 at equal intervals. The nozzles 7 are arranged above the waterproof wooden board 12. A water pipe joint 8 is fixedly installed on the outer surface of the water spray pipe 6. The water pipe joint 8 is communicated with the nozzles 7 through the water spray pipe 6.

[0040] The water spray pipe 6 is connected to an external water pump through the water pipe joint 8 and a hose. Then, the water pump is turned on so that the detection water is sprayed from the nozzles 7 onto the outer surface of the waterproof wooden board 12. The sprayed water will slide from the outer surface of the waterproof wooden board 12 close to the top to the inside of the water-containing box 28 at the bottom.

[0041] In this embodiment, the water receiving capacity of the water-containing box 28 can also receive enough water to drive the rack 23 to slide downward when the placement plate 4 is tilted to the maximum angle.

[0042] It should be noted that when the present invention is in use, the operator controls the extension and retraction movement of the telescopic end of the electric telescopic rod 11, drives the placement plate 4 to rotate around the rotating shaft, drives the pointer 10 to rotate through the rotating shaft, makes the pointer 10 point to the corresponding position on the scale disk 9, and then inserts the waterproof wooden board 12 with a fixed size cut into the inside of the limiting groove 401. The bottom end of the waterproof wooden board 12 abuts against the upper surface of the limiting plate 404. The inclination angle of the waterproof wooden board 12 can be adjusted by this device to simulate different angles of the waterproof wooden board 12 in actual installation. Since the residence time of rainwater is different at different angles, the waterproof effect of the waterproof wooden board 12 will also vary greatly, increasing the practicability of the detection device;

[0043] After the waterproof wooden board 12 is placed, the water spray pipe 6 is connected to an external water pump through the water pipe joint 8 and the hose, and then the water pump is turned on so that the detection water is sprayed from the nozzle 7 onto the outer surface of the waterproof wooden board 12. The sprayed water will slide from the outer surface near the top of the waterproof wooden board 12 to the inside of the water receiving box 28 at the bottom. As the time for the waterproof wooden board 12 to be watered increases, part of the water volume will be slowly absorbed into the inside of the waterproof wooden board 12, making the weight of the waterproof wooden board 12 gradually increase. When the weight of the waterproof wooden board 12 increases, it will drive the dovetail slide rail 403 to slide downward through the limiting plate 404. The dovetail slide rail 403 drives the pressure column 32 to move downward through the L-shaped rod 31. When the pressure column 32 moves down to contact the pressure sensor 33, an electric signal will be sent out. The water pump is stopped through the electric signal, so that the nozzle 7 stops spraying water. The operator takes out the waterproof wooden board 12. Since the elastic force of the second spring 34 is determined, the increased weight of the waterproof wooden board 12 relative to before being soaked is determined. By knowing how much time is required for the waterproof wooden board 12 to absorb the same weight of water, the waterproof performance of the waterproof wooden board 12 can be obtained. When testing the waterproof performance of the waterproof wooden board 12 by this device, the testing process is simple and the accuracy of the tested data is high;

[0044] The electromagnet 26 is controlled by an electric signal to release magnetism, so that the iron block 27 is released from the attraction of the electromagnet 26. The water receiving box 28 drives the rack 23 to slide downward. The rack 23 drives the gear 20 to rotate. The gear 20 drives the belt pulley 18 to rotate. The belt pulley 18 drives the sliding sleeve 15 to slide downward along the outer surface of the limiting slide rod 14 through the belt 19. The sliding sleeve 15 drives the rubber wiper 17 to move downward through the cross bar 16 to scrape the residual water on the upper surface of the waterproof wooden board 12 clean. This device prevents the weight of the residual water on the surface of the waterproof wooden board 12 from affecting the water absorbed by the waterproof wooden board 12. When the water is scraped clean and the increased weight of the waterproof wooden board 12 is not enough, the pressure column 32 will leave the pressure sensor 33. At this time, water will be sprayed out from the nozzle 7 again. Since the waterproof wooden board 12 is vertical or inclined, the residual water on its surface is less;

[0045] When the water receiving box 28 moves downward until the pull rope 29 is completely straightened, due to inertia, the water receiving box 28 will continue to move downward. At this time, under the action of the pull rope 29, the water receiving box 28 is driven to rotate, so that the water received inside the water receiving box 28 is drained obliquely, which is convenient for the reset movement of the water receiving box 28. The rotation fulcrum of the water receiving box 28 is deviated from the center of gravity position, and it will reset again due to its own gravity.

[0046] The above shows and describes the basic principle, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed.

Claims

1. A waterproof performance detection device for building engineering materials, comprising a base (1), characterized in that, A column (2) is fixedly installed on the upper surface of the base (1). A rotating shaft is rotatably installed between the inner walls at the top of the column (2). A rotating block (3) is fixedly installed on the outer surface of the rotating shaft. The other end of the rotating block (3) is fixedly installed with a placing plate (4). Two limiting grooves (401) are symmetrically formed on the upper surface of the placing plate (4). A waterproof wooden board (12) is slidably inserted between the inner walls of the two limiting grooves (401). A dovetail chute (402) is formed on the upper surface at the middle position of the placing plate (4). A dovetail slide rail (403) is slidably installed in the inner wall of the dovetail chute (402). A limiting plate (404) is fixedly installed on the outer surface of the dovetail slide rail (403) near the bottom end. The bottom end of the waterproof wooden board (12) abuts against the upper surface of the limiting plate (404). An L-shaped rod (31) is fixedly installed at the top end of the dovetail slide rail (403). A pressing column (32) is fixedly installed on the lower surface of the top end of the L-shaped rod (31). A second spring (34) is sleeved on the outer surface of the pressing column (32). The top end of the second spring (34) is fixedly connected to the lower surface of the L-shaped rod (31), and the bottom end of the second spring (34) is fixedly connected to the top end of the placing plate (4). A pressure sensor (33) is fixedly installed at the top end of the placing plate (4). The pressure sensor (33) is arranged directly below the pressing column (32). As the time of the waterproof wooden board (12) being drenched by water increases, part of the water will be slowly absorbed into the interior of the waterproof wooden board (12), making the weight of the waterproof wooden board (12) gradually increase. When the weight of the waterproof wooden board (12) increases, the dovetail slide rail (403) will be driven to slide downward through the limiting plate (404). The dovetail slide rail (403) drives the pressing column (32) to move downward through the L-shaped rod (31). When the pressing column (32) moves downward to contact the pressure sensor (33), an electrical signal will be emitted, and the water pump will be stopped through the electrical signal, so that the nozzle (7) stops spraying water. The operator takes out the waterproof wooden board (12). Since the elastic force of the second spring (34) is determined, the increased weight of the waterproof wooden board (12) relative to before being soaked is determined. By the time required for the waterproof wooden board (12) to absorb the same weight of water, the waterproof performance of the waterproof wooden board (12) can be obtained.

2. The waterproof performance detection device for a building engineering material according to claim 1, characterized in that, Limiting sliding sleeves (21) are fixedly installed on the outer surfaces of the opposite sides of the placing plate (4). Square sliding rods are slidably installed in the inner walls of the limiting sliding sleeves (21). A rack (23) is fixedly installed at the bottom end of the square sliding rod. A water receiving box (28) is rotatably installed between the bottom ends of the two racks (23). The water receiving box (28) is arranged directly below the waterproof wooden board (12). Blocks (22) are fixedly installed on the outer surfaces of the opposite sides of the placing plate (4).

3. An apparatus for detecting the waterproof performance of building engineering materials according to claim 2, characterized in that, A sliding post (24) is fixedly installed at the top end of the square sliding rod. The bottom end of the sliding post (24) penetrates through the outer surface of the limiting sliding sleeve (21) and is slidably installed thereon. The bottom end of the sliding post (24) abuts against the upper surface of the stop block (22). A first spring (25) is sleeved on the outer surface of the sliding post (24). The top end of the first spring (25) is fixedly connected to the lower surface of the top of the square sliding rod, and the bottom end of the first spring (25) is fixedly connected to the upper surface of the limiting sliding sleeve (21). Two pulling ropes (29) are symmetrically and fixedly installed on the upper surface of the water storage box (28). The top ends of the two pulling ropes (29) are both fixedly connected to the bottom end of the placing plate (4).

4. An apparatus for detecting the waterproof performance of building engineering materials according to claim 3, characterized in that, On the outer surfaces of the opposite sides of the placing plate (4), a group of supporting blocks (13) are fixedly installed in pairs. A group of two supporting blocks (13) in a group are arranged above the rack (23). A limiting sliding rod (14) is fixedly installed between a group of two supporting blocks (13). Sliding sleeves (15) are slidably installed on the outer surfaces of the two limiting sliding rods (14). A cross bar (16) is fixedly installed between the two sliding sleeves (15). A rubber scraping blade (17) is fixedly installed on the lower surface of the cross bar (16). The bottom of the rubber scraping blade (17) abuts against the upper surface of the waterproof wooden board (12).

5. An apparatus for detecting the waterproof performance of building engineering materials according to claim 4, characterized in that, On the outer surfaces of the opposite sides of the placing plate (4), a group of belt pulleys (18) are rotatably installed in pairs. A belt (19) is sleeved on the outer surfaces of a group of two belt pulleys (18). The bottom end of the sliding sleeve (15) is fixedly connected to the upper surface of the belt (19). A gear (20) is fixedly installed at one end of the belt pulley (18) close to the rack (23). The gear (20) meshes with the rack (23). The gear (20) is arranged below the rack (23). Electromagnets (26) are fixedly installed on the outer surfaces of the placing plate (4) close to the tops of the two square sliding rods. An iron block (27) is fixedly installed at the top end of the square sliding rod.

6. The waterproof performance detection device for a building engineering material according to claim 3, characterized in that, The fulcrum of the rotational installation of the water storage box (28) and the rack (23) is arranged on the outer surface of the two ends of the water storage box (28) far away from the pulling ropes (29). Limit blocks (30) are fixedly installed on the end faces of the opposite ends of the water storage box (28). The limit blocks (30) are arranged on the side of the rack (23) far away from the pulling ropes (29) and abut against its outer surface. The limit blocks (30) are arranged above the fulcrum of the rotational installation of the water storage box (28) and the rack (23).

7. An apparatus for detecting the waterproof performance of building engineering materials according to claim 1, characterized in that, An electric telescopic rod (11) is rotatably installed on the outer surface of the column (2) close to one side of the placing plate (4). The telescopic end of the electric telescopic rod (11) is rotatably installed on the lower surface of the placing plate (4) close to the bottom end. One end of the rotating shaft penetrates through the outer surface of the column (2) and is fixedly installed with a pointer (10). A scale disk (9) is arranged on the outer surface of the column (2) close to the pointer (10).

8. An apparatus for detecting the waterproof performance of building engineering materials according to claim 1, characterized in that, Rotating arms (5) are fixedly installed on the end faces of the rotation centers at both ends of the rotating shaft. A water spray pipe (6) is fixedly installed between the outer surfaces of the two rotating arms (5) near the top. A plurality of nozzles (7) are fixedly installed on the outer surface of the water spray pipe (6) at equal intervals. The nozzles (7) are arranged above the waterproof wooden board (12). A water pipe joint (8) is fixedly installed on the outer surface of the water spray pipe (6). The water pipe joint (8) is communicated with the nozzles (7) through the water spray pipe (6).

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