A road and bridge seepage detection device

Abstract

The present invention relates to the technical field of seepage detection, and discloses a road and bridge seepage detection device, which is designed to include a vortex disc mechanism, a water tank and a base. When performing seepage detection, the vortex disc 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 disc mechanism is fixed to the water tank. The base includes a first seat body and a second seat body, and the first seat body and the second seat body are slidably matched with each other. An annular groove is formed in the second seat body, and an annular pressing plate is slidably arranged in the annular groove. One end of the annular pressing plate is fixed to a connecting column, and the other end of the connecting column is fixed to the first seat 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, and the stability is significantly improved, and there is no need to use heavy counterweights to ensure the stability of the instrument.

Description

Technical Field

[0001] The present invention relates to the technical field of seepage detection, and particularly to a device for detecting seepage in road bridges. Background Art

[0002] Pavement seepage detection is a detection method used to evaluate the seepage performance of pavements, mainly for measuring the seepage coefficient of asphalt mixture pavements and compacted asphalt mixture specimens to test the seepage performance of pavements and the mix design of asphalt mixtures. By measuring the seepage coefficient of the pavement, the water penetration ability of the pavement material can be understood, thereby evaluating the seepage performance of the pavement.

[0003] Pavement seepage detection requires a pavement seepage meter. There is a graduated measuring cylinder at the top of the pavement seepage meter, which can observe the change of water in the measuring cylinder. There is a metal seat at the bottom, and a counterweight is installed on the metal seat to ensure the stability of the whole instrument. A sealing material needs to be applied in a circle between the base and the pavement to prevent water from seeping out between the pavement and the base.

[0004] Although the existing pavement seepage meters have a simple structure and can meet the seepage detection requirements, there are still many defects. For example, after applying the sealing material between the base and the pavement, it cannot be determined whether the pavement and the base are already sealed and water will not seep through between the pavement and the base. The applied sealing material is likely to be applied to the detection position, thus affecting the seepage effect. These factors will all cause errors between the detected seepage situation and the actual seepage situation, resulting in inaccurate detection results. Summary of the Invention

[0005] The purpose of the present invention is to provide a device for detecting seepage in road bridges to solve the problem that the existing seepage detection devices are prone to deviation in detection.

[0006] The present invention is achieved by the following technical solutions:

[0007] A device for detecting seepage in road bridges includes a scroll mechanism, a water tank and a base. When performing seepage detection, the scroll mechanism, the water tank and the base are arranged in sequence from top to bottom. The water tank is fixed to the base, the scroll mechanism is fixed to the water tank. The base includes a first seat body and a second seat body, and the first seat body and the second seat body are slidably matched with each other. An annular groove is formed in the second seat body, and an annular pressing plate is slidably arranged in the annular groove. One end of the annular pressing plate is fixed to a connecting column, and the other end of the connecting column is fixed to the first seat body. The scroll mechanism includes a measuring tube in a planar spiral shape. One end of the measuring tube is communicated with the inside of the water tank, and the other end of the measuring tube is communicated with an observation column control mechanism.

[0008] In a possible design, a spring and a locking member are further provided between the first seat body and the second seat body.

[0009] In a possible design, the locking member includes a second inclined surface formed on the first seat body, a first inclined surface formed on the second seat body, and a locking roller located between the second inclined surface and the first inclined surface. Both the second inclined surface and the first inclined surface are inclined towards the same side. When the second seat body is in a state where one side faces the ground, a receiving groove is further provided above the second inclined surface.

[0010] In a possible design, the vortex disk mechanism further includes a measuring disk and a transparent cover plate. A rectangular groove in a planar spiral shape is formed on the measuring disk, and the measuring tube is fixedly installed in the rectangular groove. A central hole is formed at the center of the measuring disk, and a connecting tube is fixedly provided at the central hole. One end of the measuring tube away from the observation column control mechanism is communicated with the connecting tube.

[0011] In a possible design, the bottom of the water tank is communicated with the central position of the second seat body. A valve mechanism is provided at the bottom of the water tank. A plugging hole is formed at the top end of the water tank, and the plugging hole is used for plugging and mating with the connecting tube.

[0012] In a possible design, the valve mechanism includes a valve rod, a fixed partition plate, and a valve opening and closing control plate. The fixed partition plate is fixed to the water tank, a through hole is formed on the fixed partition plate, the valve rod is rotatably matched with the fixed partition plate, and the valve opening and closing control plate is fixed on the valve rod.

[0013] In a possible design, two concentric annular grooves are formed on the second seat body. A detection hole is formed at the center of the second seat body. A sleeve is provided at the bottom of the water tank, and one end of the sleeve extends into the detection hole and is slidably matched 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 to the bottom of the first retaining ring sleeve. An annular gap is further formed between the first retaining ring sleeve and the sealing ring, and the annular gap is located on the side of the first retaining ring sleeve close to the annular groove.

[0014] In a possible design, a second retaining ring sleeve is further formed between the two annular grooves. A penetration detection ring is fixedly provided at the middle position of the second retaining ring sleeve. First shaping rings and second shaping rings are fixedly provided on both sides of the penetration detection ring. Both the first shaping ring and the second shaping ring are made of breathable materials. A third retaining ring sleeve is provided outside the annular groove, and a penetration slit is formed at the third retaining ring sleeve.

[0015] In a possible design, the observation column control mechanism includes a liquid storage shell, a movable tube, and a central branch pipe. The central branch pipe and the movable tube are located inside the liquid storage shell. The bottom of the central branch pipe is fixedly connected to the bottom of the liquid storage shell. The movable tube is slidably connected to the central branch pipe. The top of the liquid storage shell is provided with a ventilation hole. The central branch pipe is provided with a first liquid discharge hole, and the movable tube is provided with a second liquid discharge hole. The top of the central branch pipe is communicated with a measuring tube. The colored liquid in the observation column control mechanism is stored in the chamber formed by the enclosure of the movable tube and the liquid storage shell.

[0016] In a possible design, the formation of the observation water column is controlled by a timer. The observation column control mechanism further includes a battery coil layer fixed to the liquid storage shell, and the movable tube is made of a magnetic material.

[0017] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0018] Through the structural design of the vortex disk mechanism, the water tank, and the base, the present invention has overall changed the structural design of the traditional pavement permeameter, which consists of a graduated cylinder, a base, and a counterweight. It has changed the structure of the vertically arranged high graduated cylinder, significantly improving the stability. There is no need to use a heavy counterweight to ensure the stability of the instrument, which can save more effort and reduce the labor intensity. Moreover, the vortex disk mechanism can also more clearly and accurately observe the permeation changes of the permeable pavement. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, form a part of this application, and do not limit the embodiments of the present invention. In the drawings:

[0020] Figure 1 is a schematic structural diagram of the present invention;

[0021] Figure 2 is a top view of the vortex disk after partial cross-section of the transparent cover plate in the embodiment;

[0022] Figure 3 is a half cross-sectional view of the present invention;

[0023] Figure 4 is Figure 3 an enlarged view of part A in

[0024] Figure 5 is a schematic structural diagram of the observation column control mechanism in the liquid discharge state;

[0025] Figure 6 is Figure 3 an enlarged view of part B in

[0026] The components represented by the reference numerals are as follows: 1 - vortex disk mechanism, 101 - measuring tube, 102 - measuring disk, 103 - transparent cover plate, 105 - insertion connecting tube, 106 - central hole, 2 - water tank, 201 - support rib plate, 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 - central branch tube, 405 - ventilation hole, 406 - first liquid discharge hole, 407 - second liquid discharge hole, 5 - valve mechanism, 501 - valve rod, 502 - fixed partition plate, 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 surface, 17 - second inclined surface. Detailed implementation manners

[0027] To make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below in conjunction with embodiments and the accompanying drawings. The illustrative embodiments and descriptions thereof of the present invention are only used to explain the present invention and are not intended to limit the present invention.

[0028] Embodiment, as Figures 1 to 6 shown, a road and bridge water seepage detection device. This embodiment includes a vortex disk mechanism 1, a water tank 2 and a base 3. When performing penetration detection, the vortex disk 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, and the vortex disk mechanism 1 is fixed to the water tank 2. 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 with each other. An annular groove is formed in the second seat body 302, and an annular extrusion plate 6 is slidably arranged in the annular groove. One end of the connecting column 7 is fixed to the annular extrusion plate 6, and the other end of the connecting column 7 is fixed to the first seat body 301. The connecting column 7 penetrates through the second seat body 302. A spring 8 is further arranged between the first seat body 301 and the second seat body 302. Overall, it changes the structural design of the traditional road surface water seepage meter with a measuring cylinder plus a base 3 plus a counterweight block, and changes the structure of the vertically arranged high measuring cylinder, so that the stability is significantly improved. At the same time, there is no need to use a heavy counterweight block to ensure the stability of the instrument, which can be more labor-saving and reduce the labor intensity.

[0029] During detection, the annular groove is filled with a sealing material. Subsequently, one side of the second seat body 302 on the base 3 is placed downward at the detection position. Then, stand with both feet on the first seat body 301. The first seat body 301 drives the annular pressing plate 6 to move downward through the connecting column 7. The annular pressing plate 6 presses the sealing material against the ground. Since the weight of a person is used to press the sealing material, the sealing effect of the sealing material can be significantly improved. Under the action of the spring 8, during the pressing process, the spring 8 always pushes the first seat body 301 to contact the ground first. Blocked by the second seat body 302, the sealing material can be prevented from being squeezed into the detection area, preventing the sealing material from interfering with the detection of the detection area.

[0030] Beneficially, a plurality of the connecting columns 7 are provided between the annular pressing plate 6 and the first seat body 301. Similarly, a plurality of springs 8 are also provided between the second seat body 302 and the first seat body 301, thus ensuring the smoothness of the sliding between the second seat body 302 and the first seat body 301.

[0031] It should be noted that by stepping on the first seat body 301, the sealing material in the annular groove can be extruded. However, if the stepping force is removed, under the action of the spring 8, the annular pressing plate 6 will move back towards the bottom of the annular groove. If the first seat body 301 and the second seat body 302 are not fixed, the extruded and pressed sealing material will be sucked back into the annular groove, making it difficult to achieve a good sealing effect.

[0032] Therefore, a locking member is provided between the first seat body 301 and the second seat body 302. The locking member includes a second inclined surface 17 formed on the first seat body 301, a first inclined surface 16 formed on the second seat body 302, and a locking roller 15 located between the second inclined surface 17 and the first inclined surface 16. Both the second inclined surface 17 and the first inclined surface 16 are inclined towards 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 this 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 unidirectionally 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 the spring 8 extending. The principle is as follows;

[0033] Reference 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., the elongation 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, thus being locked. However, it will not be affected during reverse movement. If you want to make the first seat body 301 extend, you need to invert the entire base 3 and then press the second seat body 302. The locking roller 15 will fall into the receiving groove due to gravity, so 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.

[0034] In this embodiment, the scroll mechanism 1 includes a measuring tube 101 in the shape of a planar spiral. One end of the measuring tube 101 is communicated with the inside of the water tank 2, and the other end of the measuring tube 101 is communicated with the observation column control mechanism 4. The observation column control mechanism 4 stores a colored liquid. The observation column control mechanism 4 is used to inject a liquid column into the measuring tube 101. This liquid column serves as the observation water column for observation, and the seepage rate is judged according to the moving speed of the observation water column.

[0035] In this embodiment, the scroll mechanism 1 further includes a measuring disk 102 and a transparent cover plate 103. A rectangular groove in the shape of a planar spiral is formed on the measuring disk 102, and the measuring tube 101 is fixedly installed in the rectangular groove. A central hole 106 is formed at the center of the measuring disk 102, and an insertion tube 105 is also fixed at the central hole 106. The end of the measuring tube 101 far from the observation column control mechanism 4 is communicated with the insertion tube 105.

[0036] In this embodiment, the bottom of the water tank 2 is communicated with the central position of the second seat body 302. A valve mechanism 5 is provided at the bottom of the water tank 2. The opening and closing of the bottom of the water tank 2 can be controlled through the valve mechanism 5. The valve mechanism 5 includes a valve rod 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 formed on the fixed partition 502. The valve rod 501 is rotationally matched with the fixed partition 502. The valve opening and closing control plate 503 is fixed on the valve rod 501. By rotating the valve rod 501, the valve opening and closing control plate 503 can block the through hole 504, thereby completing the closing of the valve mechanism 5. Rotating the valve rod 501 can also make the valve opening and closing control plate 503 no longer block the through hole 504, thereby completing the opening of the valve mechanism 5.

[0037] An insertion hole is provided at the top of the water tank 2. The insertion hole is used for plugging and mating with the insertion pipe 105 to connect the vortex disk mechanism 1 with the inside of the water tank 2. A plurality of support rib plates 201 are fixedly arranged inside the water tank 2. The support rib plates 201 can greatly increase the structural strength of the water tank 2, so as to ensure that the water tank 2 has sufficient strength to remain unchanged during the trampling process.

[0038] Beneficially, two concentric annular grooves are provided on the second seat body 302. 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 fit with the second seat body 302. A first retaining ring sleeve is provided between the annular groove closest to the center position and the detection hole. A sealing ring 12 is fixed at 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 the side of the first retaining ring sleeve close to the annular groove. When the annular pressing plate 6 presses the sealing material in the annular groove, the bottom of the sealing ring 12 fits with the ground, and the sealing material can penetrate more into the annular notch 13, and the sealing ring 12 is pressed at the annular notch 13, rather than entering the detection area from below the sealing ring 12. Thus, the annular notch 13 and the sealing ring 12 can effectively prevent the sealing material from entering the detection area and affecting the penetration detection of the detection area.

[0039] Beneficially, a second retaining ring sleeve is further formed between the two annular grooves. A penetration detection ring 10 is fixedly arranged at the middle position of the second retaining ring sleeve. First shaping rings 9 and second shaping rings 11 are further fixed on both sides of the penetration detection ring 10. The first shaping rings 9 and the second shaping rings 11 are both made of breathable materials. When the annular pressing plate 6 presses the sealing material, the first shaping rings 9 and the second shaping rings 11 can facilitate the extrusion of the air in the annular groove and at the same time have a good shaping effect on the sealing material. The penetration detection ring 10 is used to detect the sealing effect at the annular retaining ring to judge whether water penetrates through the innermost sealing material to detect whether the sealing material is well sealed in this experiment. At the same time, a third retaining ring sleeve is further provided outside the annular groove. A penetration slit 14 is provided at the third retaining ring sleeve. The penetration slit 14 facilitates the further extrusion of the sealing material in the annular groove at this place under the first seat body 301 to further achieve a sealing effect.

[0040] 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 millimeters, and the volume inside the tube is limited. Even if the tube is coiled in a spiral, the overall length is relatively long, and the volume of the measuring tube 101 from the observation column control mechanism 4 to the water tank 2 is only 50 - 150 milliliters. Generally, for penetration testing, the penetration time of 500 milliliters of water needs to be measured. Therefore, when the previous observation water column has not yet dripped into the water tank 2, the observation column control mechanism 4 can generate a new observation water column at the connection position between the observation column control mechanism 4 and the measuring tube 101, so that the entire penetration detection test can be observed through the observation water column.

[0041] 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 inside 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 a vent hole 405. The central branch tube 404 is provided with a first liquid discharge hole 406, and the movable tube 402 is provided with a second liquid discharge hole 407. The top of the central branch tube 404 is communicated with the measuring tube 101. The colored liquid in the observation column control mechanism 4 is stored in the chamber formed by surrounding the movable tube 402 and the liquid storage shell 401. When the movable tube 402 slides to the position where the second liquid discharge hole 407 is communicated 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 tube 404 and then into the measuring tube 101. When the movable tube 402 moves to the upper position, the connection between the first liquid discharge hole 406 and the second liquid discharge hole 407 is disconnected, so that the measuring tube 101 is communicated with the outside atmosphere. During the period from the connection to the disconnection of the first liquid discharge hole 406 and the second liquid discharge hole 407, only a small part of the liquid flows into the measuring tube 101, so that a water column that can be easily observed is formed in the measuring tube 101.

[0042] Beneficially, the formation of the observation water column is controlled by a timer. The observation column control mechanism 4 further includes a battery coil layer 403 fixed to the liquid storage shell 401. The movable tube 402 is made of a magnetic material. The battery coil layer 403 can automatically control the sliding of the movable tube 402, thereby controlling the connection and disconnection state 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.

[0043] By coiling the detection tube into a planar spiral shape, the reduction of the liquid can be observed intuitively and clearly. Moreover, compared with the height of the traditional road surface seepage meter, the inner wall of the detection tube is impregnated with a hydrophobic coating. The entire detection tube and the transparent cover plate 103 are made of transparent materials. The upper surface of the transparent cover plate 103 is provided with scales, and the reduced water volume is read through the scales, so as to measure the seepage of the road surface.

[0044] Working principle:

[0045] Close the valve mechanism 5 and eject the second seat body 302. When the second seat body 302 is in the ejected state, the annular extrusion plate 6 is at the bottom of the annular groove, and the volume of the annular groove is the largest at this time.

[0046] Fill the annular groove with sealing material, turn the base 3 over, make one side of the second seat body 302 face the ground, find the detection position, align the center position of the base 3 with the detection position, lower the base 3, step on the first seat body 301, and squeeze the sealing material through the annular extrusion plate 6 for sealing.

[0047] Pour water into the water tank 2 from the insertion hole at 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 injection is completed, open the valve mechanism 5, and water seeps from the center of the base 3. Then install the vortex disk mechanism 1, insert the connecting pipe 105 into the insertion hole on the water tank 2, and keep the vortex disk mechanism 1 fixed to the water tank 2.

[0048] Inject colored liquid into the observation column control mechanism 4 to make the movable tube 402 move downward to connect the first liquid discharge hole 406 and the second liquid discharge hole 407, so that the colored liquid enters the measuring tube 101. Subsequently, make the movable tube 402 rise again, and an observable observation water column is formed in the measuring tube 101 (as shown by the black section in Figure 2 ).

[0049] Generate an observation water column in the measuring tube 101 regularly through the observation column control mechanism 4. It is necessary to generate a new observation water column in the measuring tube 101 before the previous observation water column is about to drip into the water tank 2, and use the data of different observations for composite final analysis to obtain the result of the detection test.

[0050] The cross-section of the measuring tube 101 is small, and it is more obvious to see the change in water level during penetration. The change data can be accurately read through the scale on the transparent cover plate 103. There is enough water for the penetration experiment in the water tank 2. A sealed chamber is formed between the water in the water tank 2 and the observation water column above it, and the negative pressure can drive the movement of the observation water column.

[0051] The above specific implementation manners further elaborate on the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above is only the specific implementation manner of the present invention and is not used to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A road and bridge seepage detection device, comprising a vortex disk mechanism (1), a water tank (2) and a base (3), characterized in that, When performing penetration testing, the vortex disk 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), and the vortex disk mechanism (1) is fixed to the water tank (2). The base (3) includes a first base body (301) and a second base body (302). The first base body (301) and the second base body (302) are slidably engaged with each other. An annular groove is formed on the second base body (302), and an annular pressing plate (6) is slidably arranged in the annular groove. One end of the connecting column (7) is fixed to the annular pressing plate (6), and the other end of the connecting column (7) is fixed to the first base body (301). The vortex disk mechanism (1) includes a measuring tube (101) in a planar spiral shape. One end of the measuring tube (101) is communicated with the inside of the water tank (2), and the other end of the measuring tube (101) is communicated with the observation column control mechanism (4). The observation column control mechanism (4) is used to periodically generate a small section of observation water column in the measuring tube (101).

2. The water seepage detection device for road bridges according to claim 1, wherein, A spring (8) and a locking member are further arranged between the first base body (301) and the second base body (302).

3. The water seepage detection device for road bridges according to claim 2, wherein, The locking member includes 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). Both the second inclined surface (17) and the first inclined surface (16) are inclined towards the same side. When the second base body (302) is in a state with one side facing the ground, a receiving groove is further arranged above the second inclined surface (17).

4. The water seepage detection device for road bridges according to claim 1, characterized in that, The vortex disk mechanism (1) further includes a measuring disk (102) and a transparent cover plate (103). A rectangular groove in a planar spiral shape is formed on the measuring disk (102), and the measuring tube (101) is fixedly installed in the rectangular groove. A central hole (106) is formed at the center of the measuring disk (102), and an insertion tube (105) is further fixed at the central hole (106). One end of the measuring tube (101) away from the observation column control mechanism (4) is communicated with the insertion tube (105).

5. The water seepage detection device for road bridges according to claim 4, characterized in that, The bottom of the water tank (2) is communicated with the central position of the second base body (302). A valve mechanism (5) is arranged at the bottom of the water tank (2). An insertion hole is formed at the top end of the water tank (2), and the insertion hole is used for plugging and matching with the insertion tube (105).

6. The water seepage detection device for road bridges according to claim 5, characterized in that, The valve mechanism (5) includes a valve rod (501), a fixed partition plate (502), and a valve opening and closing control plate (503). The fixed partition plate (502) is fixed to the water tank (2). A through hole (504) is formed on the fixed partition plate (502). The valve rod (501) is rotatably engaged with the fixed partition plate (502), and the valve opening and closing control plate (503) is fixed to the valve rod (501).

7. The water seepage detection device for road bridges according to claim 1, characterized in that Two concentric annular grooves are formed on the second body (302). A detection hole is formed at the center of the second 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 fit with the second body (302). A first retaining ring sleeve is provided between the annular groove closest to the center position 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 formed between the first retaining ring sleeve and the sealing ring (12). The annular notch (13) is located on the side of the first retaining ring sleeve close to the annular groove.

8. The water seepage detection device for road bridges according to claim 7, wherein, A second retaining ring sleeve is further formed between the two annular grooves. A penetrant inspection ring (10) is fixedly provided at the middle position of the second retaining ring sleeve. First shaping rings (9) and second shaping rings (11) are fixedly provided on both sides of the penetrant inspection ring (10). The first shaping rings (9) and the second shaping rings (11) are both made of breathable materials. A third retaining ring sleeve is further provided outside the annular groove. A penetration slit (14) is formed at the third retaining ring sleeve.

9. The water seepage detection device for road bridges according to claim 1, characterized in that, The observation column control mechanism (4) includes a liquid storage shell (401), a movable tube (402), and a central branch pipe (404). The central branch pipe (404) and the movable tube (402) are located inside the liquid storage shell (401). The bottom of the central branch pipe (404) is fixedly connected to the bottom of the liquid storage shell (401). The movable tube (402) is slidably connected to the central branch pipe (404). A ventilation hole (405) is provided at the top of the liquid storage shell (401). A first liquid discharge hole (406) is formed on the central branch pipe (404). A second liquid discharge hole (407) is formed on the movable tube (402). The top of the central branch pipe (404) is communicated with a measuring tube (101). The colored liquid in the observation column control mechanism (4) is stored in the chamber formed by surrounding the movable tube (402) and the liquid storage shell (401).

10. The water seepage detection device for road bridges 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 includes a battery coil layer (403) fixed to the liquid storage shell (401). The movable tube (402) is made of a magnetic material.

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