Road and bridge water seepage detection device

Abstract

The invention relates to the technical field of water seepage detection, and discloses a road and bridge water seepage detection device, the road and bridge water seepage detection device comprises a vortex disc mechanism, a water tank and a base, during penetration detection, the vortex disc mechanism, the water tank and the base are sequentially arranged from top to bottom, the water tank is fixed with the base, the vortex disc mechanism is fixed with the water tank, and the vortex disc mechanism is fixed with the base. The base comprises a first base body and a second base body, the first base body is in sliding fit with the second base body, an annular groove is formed in the second base body, an annular extrusion plate is arranged in the annular groove in a sliding mode, the annular extrusion plate is fixed to one end of a connecting column, and the other end of the connecting column is fixed to the first base body. Through the structural design of the vortex disc mechanism, the water tank and the base, the structure of the vertically-arranged high measuring cylinder is changed, the stability is obviously improved, and the stability of the instrument does not need to be guaranteed through a heavy balancing weight.

Description

Technical Field

[0001] The invention relates to the technical field of water seepage detection, and in particular to a road bridge water seepage detection device. Background Art

[0002] Pavement water seepage test is a test method used to evaluate the water seepage performance of pavement. It is mainly used to determine the water seepage coefficient of asphalt mixture pavement and rolled asphalt mixture specimens to test the water seepage performance of the pavement and the mix design of asphalt mixture. By measuring the water seepage coefficient of the pavement, we can understand the water penetration capacity of the pavement material and thus evaluate the water seepage performance of the pavement.

[0003] Road seepage detection requires a road seepage meter. The top of the road seepage meter is equipped with a graduated cylinder to observe the changes in the water in the cylinder. The bottom has a metal base with a counterweight installed on it to ensure the stability of the entire instrument. A circle of sealing material is also required between the base and the road surface to prevent water from seeping out from between the road surface and the base.

[0004] Although the existing pavement water seepage meter has a simple structure and can meet the needs of water seepage detection, it still has many defects. For example, after the base and the road surface are coated with sealing material, it cannot be judged that the road surface and the base are sealed and water will not penetrate from the road surface and the base. The applied sealing material is easy to be applied to the detection position, thus affecting the water seepage effect. These factors will cause errors between the detected water seepage and the actual water seepage, resulting in inaccurate detection results. Summary of the invention

[0005] The present invention aims to provide a road bridge water seepage detection device to solve the problem that the existing water seepage detection device is prone to detection deviation.

[0006] The present invention is achieved through the following technical solutions: A road bridge water seepage detection device includes a vortex mechanism, a water tank and a base. When performing a penetration test, the vortex mechanism, the water tank and the base are arranged in sequence from top to bottom. The water tank is fixed to the base, and the vortex mechanism is fixed to the water tank. The base includes a first seat body and a second seat body. The first seat body and the second seat body are slidably matched. An annular groove is provided on the second seat body. An annular extrusion plate is slidably provided in the annular groove. The annular extrusion plate is fixed to one end of a connecting column, and the other end of the connecting column is fixed to the first seat body. The vortex mechanism includes a measuring tube in a planar spiral shape. One end of the measuring tube is connected to the inside of the water tank, and the other end of the measuring tube is connected to an observation column control mechanism.

[0007] In a possible design, a spring and a locking member are further provided between the first base body and the second base body.

[0008] In a possible design, the locking member includes a second inclined surface opened on the first base body, a first inclined surface opened on the second base body, and a locking roller located between the second inclined surface and the first inclined surface. The second inclined surface and the first inclined surface are both inclined toward the same side. When one side of the second base body is facing the ground, a receiving groove is also provided above the second inclined surface.

[0009] In a possible design, the vortex mechanism also includes a measuring disk and a transparent cover plate. The measuring disk is provided with a planar spiral rectangular groove, in which the measuring tube is fixedly installed. A center hole is provided at the center of the measuring disk, and a plug-in tube is also fixed at the center hole. The end of the measuring tube away from the observation column control mechanism is connected to the plug-in tube.

[0010] In a possible design, the bottom of the water tank is connected to the center of the second seat body, a valve mechanism is provided at the bottom of the water tank, and a plug hole is opened at the top of the water tank, and the plug hole is used to be plugged with the plug tube.

[0011] In a possible design, the valve mechanism includes a valve stem, a fixed partition and a valve opening and closing control plate. The fixed partition is fixed to the water tank, a through hole is opened on the fixed partition, the valve stem is rotatably matched with the fixed partition, and the valve opening and closing control plate is fixed on the valve stem.

[0012] In a possible design, two concentric annular grooves are provided on the second seat body, a detection hole is provided at the center of the second seat body, a sleeve is provided at the bottom of the water tank, one end of the sleeve extends into the detection hole and is in a sliding fit with the second seat body, a first retaining ring sleeve is provided between the annular groove closest to the center position and the detection hole, a sealing ring is fixed at the bottom of the first retaining ring sleeve, and an annular notch is provided between the first retaining ring sleeve and the sealing ring, and the annular notch is located on the side of the first retaining ring sleeve close to the annular groove.

[0013] In a possible design, a second retaining ring sleeve is formed between the two annular grooves, a penetration detection ring is fixedly provided at the middle position of the second retaining ring sleeve, a first shaping ring and a second shaping ring are fixedly provided on both sides of the penetration detection ring, the first shaping ring and the second shaping ring are both made of breathable materials, a third retaining ring sleeve is provided on the outer side of the annular groove, and a penetration seam is also opened at the third retaining ring sleeve.

[0014] In a possible design, the observation column control mechanism includes a liquid storage shell, a movable tube and a central branch tube, the central branch tube and the movable tube are located in the liquid storage shell, the bottom of the central branch tube is fixedly connected to the bottom of the liquid storage shell, the movable tube is slidably connected to the central branch tube, the top of the liquid storage shell is provided with an air hole, the central branch tube is provided with a first liquid drain hole, the movable tube is provided with a second liquid drain hole, the top of the central branch tube is connected to the measuring tube, and the colored liquid in the observation column control mechanism is stored in a chamber formed by the movable tube and the liquid storage shell.

[0015] In a possible design, the formation of the observation water column is controlled by a timer, the observation column control mechanism also includes a battery coil layer fixed to the liquid storage shell, and the movable tube is made of magnetic material.

[0016] Compared with the prior art, the present invention has the following advantages and beneficial effects: The present invention changes the structural design of the traditional road permeability meter measuring cylinder plus base plus counterweight block through the structural design of the vortex mechanism, water tank and base, changes the vertically arranged high measuring cylinder structure, and significantly improves the stability. There is no need to use heavy counterweight blocks to ensure the stability of the instrument, which can save more effort and reduce labor intensity. In addition, the vortex mechanism can also observe the permeability changes of the permeable road surface more clearly and accurately. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the drawings: Figure 1 It is a structural schematic diagram of the present invention; Figure 2 A top view of the scroll after a partial cross-section of the transparent cover in the embodiment; Figure 3 A half-section view of the present invention; Figure 4 for Figure 3 The enlarged view of point A in the middle; Figure 5 It is a structural schematic diagram of the observation column control mechanism in the liquid discharging state; Figure 6 for Figure 3 Enlarged view of point B in the middle. The reference numerals represent: 1-scroll mechanism, 101-measuring tube, 102-measuring disk, 103-transparent cover, 105-plug tube, 106-center hole, 2-water tank, 201-support rib, 3-base, 301-first seat body, 302-second seat body, 4-observation column control mechanism, 401-liquid storage shell, 402-movable tube, 403-battery coil layer, 404-center branch pipe, 405-ventilation hole, 406-center branch pipe, 407-center branch pipe, 408-center branch pipe, 409-center branch pipe, 410-center branch pipe, 411-center branch pipe, 412-center branch pipe, 413-center branch pipe, 414-center branch pipe, 415-center branch pipe, 416-center branch pipe, 417-center branch pipe, 418-center branch pipe, 419-center branch pipe, 420-center branch pipe, 421-center branch pipe, 422-center branch pipe, 423-center branch pipe, 424-center branch pipe, 425-center branch pipe, 426-center branch pipe, 427-center branch pipe, 428-center branch pipe, 429-center branch pipe, 430-center branch pipe, 431-center branch pipe, 432-center branch pipe, 433-center branch pipe, 434-center branch pipe, 435-center branch pipe, 436-center branch pipe, 437-center branch pipe, 438-center branch pipe, 439-center branch pipe, 440-center branch pipe, 441-center branch pipe, 442-center branch pipe, 443-center branch pipe, 444-center branch pipe, 4 6-first drain hole, 407-second drain hole, 5-valve mechanism, 501-valve stem, 502-fixed partition, 503-valve opening and closing control plate, 504-through hole, 6-annular extrusion plate, 7-connecting column, 8-spring, 9-first shaping ring, 10-penetration detection ring, 11-second shaping ring, 12-sealing ring, 13-annular notch, 14-penetration seam, 15-locking roller, 16-first inclined plane, 17-second inclined plane. DETAILED DESCRIPTION

[0018] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments and drawings. The exemplary embodiments of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention.

[0019] Examples, such as Figures 1 to 6 As shown, a road bridge water seepage detection device, this embodiment includes a vortex mechanism 1, a water tank 2 and a base 3. When performing penetration detection, the vortex mechanism 1, the water tank 2 and the base 3 are arranged in sequence from top to bottom, the water tank 2 is fixed to the base 3, the vortex mechanism 1 is fixed to the water tank 2, and the base 3 includes a first seat body 301 and a second seat body 302, the first seat body 301 and the second seat body 302 are slidably matched, the second seat body 302 is provided with an annular groove, and an annular extrusion plate 6 is slidably provided in the annular groove, the annular extrusion plate 6 is fixed to one end of a connecting column 7, and the other end of the connecting column 7 is fixed to the first seat body 301, and the connecting column 7 passes through the second seat body 302. A spring 8 is also provided between the first seat body 301 and the second seat body 302, which overall changes the structural design of the traditional road permeability meter measuring cylinder plus the base 3 and the counterweight block, changes the vertically arranged high measuring cylinder structure, and significantly improves the stability. At the same time, there is no need to use heavy counterweights to ensure the stability of the instrument, which can save effort and reduce labor intensity.

[0020] During the test, the annular groove is filled with sealing material, and then the second seat body 302 on the base 3 is placed with one side facing downward at the test position. Then, the feet are stood on the first seat body 301, and the first seat body 301 drives the annular extrusion plate 6 to move downward through the connecting column 7. The annular extrusion plate 6 presses the sealing material against the ground. Since the sealing material is squeezed by the weight of a person, the sealing effect of the sealing material can be significantly improved. Under the action of the spring 8, during the squeezing process, the spring 8 always pushes the first seat body 301 to contact the ground first, and the blocking of the second seat body 302 can prevent the sealing material from being squeezed into the test area, preventing the sealing material from interfering with the detection of the test area.

[0021] Advantageously, a plurality of connecting columns 7 are provided between the annular extrusion plate 6 and the first seat body 301 , and a plurality of springs 8 are also provided between the second seat body 302 and the first seat body 301 , thereby ensuring smooth sliding between the second seat body 302 and the first seat body 301 .

[0022] It should be noted that the sealing material in the annular groove can be squeezed out by stepping on the first seat body 301, but if the stepping force is removed, under the action of the spring 8, the annular extrusion plate 6 will move in the direction of retracting to the bottom of the annular groove. If the first seat body 301 and the second seat body 302 are not fixed, the squeezed and compressed sealing material will be sucked back into the annular groove, making it difficult to achieve a good sealing effect.

[0023] To this end, a locking member is provided between the first seat body 301 and the second seat body 302, and the locking member includes a second inclined surface 17 provided on the first seat body 301, a first inclined surface 16 provided on the second seat body 302, and a locking roller 15 located between the second inclined surface 17 and the first inclined surface 16. The second inclined surface 17 and the first inclined surface 16 are both inclined toward the same side. When one side of the second seat body 302 faces the ground, a receiving groove is further provided above the second inclined surface 17. When the locking roller 15 rolls into the receiving groove, the second seat body 302 and the first seat body 301 can slide freely. When the locking roller 15 rolls between the first inclined surface 16 and the second inclined surface 17, the second seat body 302 can only move in one direction relative to the first seat body 301, that is, the second seat body 302 can move in the direction of compressing the spring 8, but cannot move in the direction of extending the spring 8. The principle is as follows; refer to Figure 6, when the locking roller 15 is located between the second inclined surface 17 and the first inclined surface 16, if the first seat body 301 remains stationary and the second seat body 302 moves downward (i.e., in the extension direction of the spring 8), the first inclined surface 16 will be blocked by the valve mechanism 5, and the rolling of the valve mechanism 5 will be blocked by the second inclined surface 17, thereby locking it, but it will not be affected when moving in the opposite direction. If you want to extend the first seat body 301, you need to invert the entire base 3, and then press the second seat body 302, and the locking roller 15 will fall into the receiving groove due to gravity, so that there is no locking roller 15 between the first inclined surface 16 and the second inclined surface 17, and the second seat body 302 can automatically extend.

[0024] In this embodiment, the vortex mechanism 1 includes a measuring tube 101 in a planar spiral shape, one end of the measuring tube 101 is connected to the interior of the water tank 2, and the other end of the measuring tube 101 is connected to the observation column control mechanism 4. The observation column control mechanism 4 contains a colored liquid. The observation column control mechanism 4 is used to inject a liquid column into the measuring tube 101. The liquid column serves as an observation water column for observation, and the penetration rate is judged according to the moving speed of the observation water column.

[0025] In this embodiment, the vortex mechanism 1 also includes a measuring disk 102 and a transparent cover plate 103. The measuring disk 102 is provided with a planar spiral rectangular groove, in which the measuring tube 101 is fixedly installed. A center hole 106 is provided at the center of the measuring disk 102, and a plug-in tube 105 is also fixed at the center hole 106. The end of the measuring tube 101 away from the observation column control mechanism 4 is connected to the plug-in tube 105.

[0026] In this embodiment, the bottom of the water tank 2 is connected to the center position of the second seat body 302, and a valve mechanism 5 is provided at the bottom of the water tank 2, through which the opening and closing of the bottom of the water tank 2 can be controlled, and the valve mechanism 5 includes a valve stem 501, a fixed partition 502 and a valve opening and closing control plate 503, the fixed partition 502 is fixed to the water tank 2, a through hole 504 is provided on the fixed partition 502, the valve stem 501 and the fixed partition 502 are rotatably matched, and the valve opening and closing control plate 503 is fixed on the valve stem 501, and the valve opening and closing control plate 503 can be rotated by the valve stem 501 to block the through hole 504, thereby completing the closing of the valve mechanism 5, and rotating the valve stem 501 can also prevent the valve opening and closing control plate 503 from blocking the through hole 504, thereby completing the opening of the valve mechanism 5.

[0027] A plug hole is provided at the top of the water tank 2, and the plug hole is used to plug and cooperate with the plug tube 105 to connect the scroll mechanism 1 with the inside of the water tank 2. A plurality of supporting ribs 201 are fixedly provided inside the water tank 2. The supporting ribs 201 can greatly increase the structural strength of the water tank 2, thereby ensuring that the water tank 2 has sufficient strength to remain unchanged during the pedaling process.

[0028] Advantageously, two concentric annular grooves are provided on the second base body 302, a detection hole is provided at the center of the second base body 302, a sleeve is provided at the bottom of the water tank 2, one end of the sleeve extends into the detection hole and is in a sliding fit with the second base body 302, a first retaining ring sleeve is provided between the annular groove closest to the center and the detection hole, a sealing ring 12 is fixed to the bottom of the first retaining ring sleeve, an annular notch 13 is further provided between the first retaining ring sleeve and the sealing ring 12, the annular notch 13 is located on a side of the first retaining ring sleeve close to the annular groove, when the annular extrusion plate 6 squeezes the sealing material in the annular groove, the bottom of the sealing ring 12 fits against the ground, the sealing material can penetrate more into the annular notch 13, squeezing the sealing ring 12 at the annular notch 13, rather than entering the detection area from below the sealing ring 12, thereby effectively preventing the sealing material from entering the detection area through the annular notch 13 and the sealing ring 12, thereby affecting the penetration detection of the detection area.

[0029] Advantageously, a second retaining ring is formed between the two annular grooves, and a penetration detection ring 10 is fixedly provided in the middle of the second retaining ring. A first shaping ring 9 and a second shaping ring 11 are fixedly provided on both sides of the penetration detection ring 10. The first shaping ring 9 and the second shaping ring 11 are both made of breathable materials. When the annular extrusion plate 6 squeezes the sealing material, the first shaping ring 9 and the second shaping ring 11 can squeeze out the air in the annular groove and have a good shaping effect on the sealing material. The penetration detection ring 10 is used to detect the sealing effect of the annular retaining ring and determine whether water has penetrated the innermost sealing material to detect whether the sealing material is well sealed in this experiment. At the same time, a third retaining ring is provided on the outside of the annular groove, and a penetration seam 14 is provided at the third retaining ring. The penetration seam 14 facilitates the sealing material in the annular groove to be further squeezed into the bottom of the first seat 301, thereby further achieving a sealing effect.

[0030] It should be noted that the measuring tube 101 at the top has a small diameter, generally with an inner diameter of 1 to 3 mm, and the volume inside the tube is limited. Even if the tube is spirally coiled and the overall length is relatively long, the volume of the measuring tube 101 from the observation column control mechanism 4 to the water tank 2 is only 50-150 ml. Generally, penetration testing requires measuring the penetration time of 500 ml of water. For this reason, a new observation water column can be generated at the connection position between the observation column control mechanism 4 and the measuring tube 101 through the observation column control mechanism 4 when the previous observation water column has not yet dripped into the water tank 2, so that the observation of the entire penetration detection test can be completed by observing the water column.

[0031] Based on this, the observation column control mechanism 4 includes a liquid storage shell 401, a movable tube 402 and a central branch tube 404. The central branch tube 404 and the movable tube 402 are located in the liquid storage shell 401. The bottom of the central branch tube 404 is fixedly connected to the bottom of the liquid storage shell 401. The movable tube 402 is slidably connected to the central branch tube 404. The top of the liquid storage shell 401 is provided with an air hole 405. The central branch tube 404 is provided with a first liquid discharge hole 406. The movable tube 402 is provided with a second liquid discharge hole 407. The top of the central branch tube 404 is connected to the measuring tube 101. The colored liquid in the observation column control mechanism 4 is stored in the liquid storage shell 401 by the movable tube 402. 2 and the liquid storage shell 401, when the movable tube 402 slides to the second liquid discharge hole 407 and is connected with the first liquid discharge hole 406, the colored liquid flows from the first liquid discharge hole 406 and the second liquid discharge hole 407 into the central branch pipe 404 and then into the measuring tube 101. When the movable tube 402 moves to the upper end position, the first liquid discharge hole 406 and the second liquid discharge hole 407 are disconnected, so that the measuring tube 101 is connected with the outside atmosphere. During the period from the first liquid discharge hole 406 to the second liquid discharge hole 407 being connected to being disconnected, only a small part of the liquid flows into the measuring tube 101, thereby forming a water column in the measuring tube 101, one end of which can be easily observed.

[0032] Advantageously, the formation of the observation water column is controlled by a timer, and the observation column control mechanism 4 also includes a battery coil layer 403 fixed to the liquid storage shell 401, and the movable tube 402 is made of magnetic material. The sliding of the movable tube 402 can be automatically controlled by the battery coil layer 403, thereby controlling the disconnection state of the connection between the first liquid discharge hole 406 and the second liquid discharge hole 407, and automatically forming an observation water column in the measuring tube 101.

[0033] The detection tube coiled into a flat spiral shape can intuitively and clearly observe the reduction of liquid. Compared with the traditional pavement water seepage meter, the inner wall of the detection tube is soaked with hydrophobic coating. The entire detection tube and the transparent cover 103 are made of transparent material. The upper surface of the transparent cover 103 is marked with scales. The reduced water volume is read by the scale to measure the water permeability of the road surface.

[0034] Working principle: The valve mechanism 5 is closed, and the second seat body 302 is ejected. When the second seat body 302 is in the ejected state, the annular extrusion plate 6 is located at the bottom of the annular groove, and the volume of the annular groove is the largest at this time.

[0035] Fill the annular groove with sealing material, turn the base 3 over so that one side of the second base body 302 faces the ground, find the detection position, align the center position of the base 3 with the detection position, put down the base 3, step on the first base body 301, and extrude the sealing material through the annular extrusion plate 6 to seal.

[0036] Fill water into the water tank 2 from the plug hole on the top of the water tank 2 to ensure that there is enough water in the water tank 2 to complete the sealing test. After the water filling is completed, open the valve mechanism 5, and water begins to seep from the center of the base 3. Then install the vortex mechanism 1, and plug the plug tube 105 into the plug hole on the water tank 2 to keep the vortex mechanism 1 and the water tank 2 fixed.

[0037] Inject colored liquid into the observation column control mechanism 4, move the movable tube 402 downward to connect the first liquid discharge hole 406 with the second liquid discharge hole 407, so that the colored liquid enters the measuring tube 101, and then move the movable tube 402 upward to form an observation water column (such as Figure 2 ).

[0038] An observation water column is generated in the measuring tube 101 at a regular interval through the observation column control mechanism 4. A new observation water column needs to be generated in the measuring tube 101 before the previous observation water column is about to drip into the water tank 2. The data from different observations are used for a composite final analysis to obtain the results of the detection test.

[0039] The cross-section of the measuring tube 101 is small, so the change of water level during infiltration can be more clearly seen, and the change data can be accurately read through the scale on the transparent cover 103. There is enough water in the water tank 2 for the infiltration experiment. A sealed chamber is formed between the top of the water in the water tank 2 and the observation water column, and the negative pressure can drive the movement of the observation water column.

[0040] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A road bridge water seepage detection device, comprising a vortex mechanism (1), a water tank (2) and a base (3), characterized in that: When performing a penetration test, the scroll mechanism (1), the water tank (2) and the base (3) are arranged in sequence from top to bottom, the water tank (2) and the base (3) are fixed, and the scroll mechanism (1) and the water tank (2) are fixed; The base (3) comprises a first base body (301) and a second base body (302), the first base body (301) and the second base body (302) are slidably matched, an annular groove is provided on the second base body (302), an annular extrusion plate (6) is slidably provided in the annular groove, the annular extrusion plate (6) is fixed to one end of a connecting column (7), and the other end of the connecting column (7) is fixed to the first base body (301); The scroll mechanism (1) comprises a planar spiral measuring tube (101), one end of the measuring tube (101) being connected to the interior of a water tank (2), and the other end of the measuring tube (101) being connected to an observation column control mechanism (4).

2. A road and bridge water seepage detection device according to claim 1, characterized in that: A spring (8) and a locking member are also provided between the first seat body (301) and the second seat body (302).

3. A road bridge water seepage detection device according to claim 2, characterized in that: The locking member comprises a second inclined surface (17) formed on the first base body (301), a first inclined surface (16) formed on the second base body (302), and a locking roller (15) located between the second inclined surface (17) and the first inclined surface (16); the second inclined surface (17) and the first inclined surface (16) are both inclined toward the same side; when one side of the second base body (302) is facing the ground, a receiving groove is further provided above the second inclined surface (17).

4. A road and bridge water seepage detection device according to claim 1, characterized in that: The scroll mechanism (1) further comprises a measuring disc (102) and a transparent cover plate (103); the measuring disc (102) is provided with a rectangular groove in a planar spiral shape, the measuring tube (101) is fixedly mounted in the rectangular groove, a center hole (106) is provided at the center of the measuring disc (102), a plug-in tube (105) is also fixed at the center hole (106), and an end of the measuring tube (101) away from the observation column control mechanism (4) is connected to the plug-in tube (105).

5. A road and bridge water seepage detection device according to claim 4, characterized in that: The bottom of the water tank (2) is connected to the center of the second seat body (302), a valve mechanism (5) is provided at the bottom of the water tank (2), and a plug hole is provided at the top of the water tank (2), the plug hole being used for plugging and cooperating with the plug tube (105).

6. A road and bridge water seepage detection device according to claim 5, characterized in that: The valve mechanism (5) comprises a valve stem (501), a fixed baffle (502) and a valve opening and closing control plate (503); the fixed baffle (502) is fixed to the water tank (2); a through hole (504) is provided on the fixed baffle (502); the valve stem (501) and the fixed baffle (502) are rotatably matched; and the valve opening and closing control plate (503) is fixed to the valve stem (501).

7. A road and bridge water seepage detection device according to claim 1, characterized in that: The second seat body (302) is provided with two concentric annular grooves, a detection hole is provided at the center of the second seat body (302), a sleeve is provided at the bottom of the water tank (2), one end of the sleeve extends into the detection hole and is in sliding engagement with the second seat body (302), a first retaining ring sleeve is provided between the annular groove closest to the center and the detection hole, a sealing ring (12) is fixed at the bottom of the first retaining ring sleeve, an annular notch (13) is provided between the first retaining ring sleeve and the sealing ring (12), and the annular notch (13) is located on a side of the first retaining ring sleeve close to the annular groove.

8. A road and bridge water seepage detection device according to claim 7, characterized in that: A second retaining ring sleeve is formed between the two annular grooves, a penetration detection ring (10) is fixedly provided in the middle of the second retaining ring sleeve, a first shaping ring (9) and a second shaping ring (11) are fixedly provided on both sides of the penetration detection ring (10), the first shaping ring (9) and the second shaping ring (11) are both made of breathable materials, a third retaining ring sleeve is provided on the outer side of the annular groove, and a penetration slit (14) is also provided at the third retaining ring sleeve.

9. A road and bridge water seepage detection device according to claim 1, characterized in that: The observation column control mechanism (4) comprises a liquid storage shell (401), a movable tube (402) and a central branch tube (404); the central branch tube (404) and the movable tube (402) are located in the liquid storage shell (401); the bottom of the central branch tube (404) is fixedly connected to the bottom of the liquid storage shell (401); the movable tube (402) is slidably connected to the central branch tube (404); a vent hole (405) is provided at the top of the liquid storage shell (401); a first liquid discharge hole (406) is provided on the central branch tube (404); a second liquid discharge hole (407) is provided on the movable tube (402); the top of the central branch tube (404) is connected to the measuring tube (101); and the colored liquid in the observation column control mechanism (4) is stored in a chamber surrounded by the movable tube (402) and the liquid storage shell (401).

10. A road and bridge water seepage detection device according to claim 9, characterized in that: The formation of the observation water column is controlled by a timer. The observation column control mechanism (4) further comprises a battery coil layer (403) fixed to the liquid storage shell (401). The movable tube (402) is made of magnetic material.

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