Underwater crack grouting retention rate testing device

Abstract

The invention discloses an underwater crack grouting retention rate testing device, and relates to the field of grouting retention rate test.The underwater crack grouting retention rate testing device comprises a supporting assembly and a testing table top fixed to the supporting assembly, a testing box, a water supply box and a grouting box are arranged on the testing table top, and the water supply box is located on the side face of the testing box and communicates with the testing box through a water inlet pipeline; the other side of the testing box is connected with a purified water tank through a drainage pipeline, the purified water tank is communicated with the water supply tank through a water return pipeline, the grouting box is connected with the height adjusting assembly, the side face of the grouting box is connected with a grouting pipe, and the tail end of the grouting pipe is located at the testing box. (1) the height of the grouting box is adjusted through the height adjusting assembly, so that the grouting pressure is adjusted, and the retention rate under different grouting pressures can be met; (2) simulating the underground water flowing condition through a water inlet pump, and adjusting the height of the model to meet the retention rate under different underground water level conditions; and (3) recycling of water is realized by arranging a purification water tank, and the utilization rate of water resources is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of grouting retention rate testing, in particular to an underwater crack grouting retention rate testing device. BACKGROUND

[0002] In the fields of water conservancy engineering, underground engineering and marine engineering, the existence of underwater cracks can seriously affect the stability and durability of engineering structures, and grouting technology is one of the key means to repair underwater cracks. As a core index for evaluating the grouting effect, the accuracy of the test results of grouting retention rate directly determines the rationality of the grouting scheme and the quality of engineering repair, therefore, it is of great practical significance to develop a reliable underwater crack grouting retention rate testing device.

[0003] At present, the existing underwater crack grouting retention rate testing devices in the industry gradually expose many technical defects in actual application, and are difficult to meet the testing needs in complex engineering scenarios. It is difficult to meet the reality of grouting and simulating groundwater flow. Directly using a large amount of water to simulate the flow of actual groundwater will waste a lot of water resources and is not suitable for implementation in laboratory testing environment. SUMMARY

[0004] The purpose of the present application is to provide an underwater crack grouting retention rate testing device to solve the problems raised in the background art.

[0005] To achieve the above purpose, the present application provides the following technical scheme: An underwater crack grouting retention rate testing device, comprising a support assembly and a testing table fixed on the support assembly, a test box, a water supply tank and a grouting tank are arranged on the testing table, the water supply tank is located on the side of the test box, the water supply tank is communicated with the test box through a water inlet pipeline, the other side of the test box is connected with a purified water tank through a water outlet pipeline, the purified water tank is communicated with the water supply tank through a water return pipeline, the grouting tank is connected with a height adjusting assembly, the grouting tank is connected with a grouting pipe on the side, and the end of the grouting pipe is located in the test box.

[0006] As a further scheme of the present application: the support assembly comprises a support rod, a support sleeve is fixedly connected on the support rod, a support column is slidably connected in the support sleeve, the support column is fixedly connected with the testing table, and a locking bolt for locking the position of the support column is threadedly connected on the side of the support sleeve.

[0007] As a further scheme of the present application: a water inlet pump is connected in the middle of the water inlet pipeline, the end of the water inlet pipeline comprises a main pipeline and a plurality of branch pipelines communicated with the main pipeline, and the branch pipelines are connected to different positions on the side of the test box.

[0008] As a further scheme of the present application: the height adjustment assembly comprises a first screw rod and a guide column, one side of the grouting box is threadedly connected with the first screw rod, the other side of the grouting box is slidably connected with the guide column, and the bottom of the first screw rod is drivingly connected with the power unit.

[0009] As a further scheme of the present application: the grouting box is longitudinally slidably connected with a model placing table, the side of the model placing table is fixedly connected with a pull rod, the test table is rotatably connected with a second screw rod, the side of the second screw rod is threadedly connected with a transmission plate, the pull rod and the transmission plate are connected with a weighing sensor, and the bottom of the second screw rod is drivingly connected with the power unit.

[0010] As a further scheme of the present application: the power unit comprises a driving motor, the output shaft of the driving motor is fixedly connected with a driving gear, the bottom of the first screw rod is fixedly connected with a first driven gear, the bottom of the second screw rod is fixedly connected with a second driven gear, and the driving gear is meshingly connected with the first driven gear or the second driven gear.

[0011] As a further scheme of the present application: the bottom of the test table is further fixedly connected with an electric telescopic rod, the driving motor is fixedly connected with the end of the electric telescopic rod, the side of the test table is fixedly connected with a guide support, and the motor is slidably connected with the guide support.

[0012] As a further scheme of the present application: the inside of the purified water tank is fixedly connected with a longitudinal partition plate, the two sides of the longitudinal partition plate are respectively fixedly connected with a first filter element and a second filter element, and the longitudinal partition plate is uniformly provided with through holes.

[0013] As a further scheme of the present application: the middle of the water return pipeline is connected with a water return pump.

[0014] Compared with the prior art, the present application has the following advantages: ① the present application has simple structure and is convenient to use, the height of the grouting box is adjusted by the height adjustment assembly, so that the grouting pressure is adjusted to meet the retention rate under different grouting pressures; ② the water inflow pump is used to simulate the underground water flow, and the model height is adjusted to meet the retention rate under different underground water levels; ③ the water is recycled by the purified water tank, so that the utilization rate of water resources is improved; and ④ a single driving motor is used to simultaneously drive the rotation of two different screw rods, so that the accuracy of test results is maximized at low cost. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a structure schematic view of a first perspective of a water crack grouting retention rate testing device.

[0016] Figure 2 It is a structure schematic view of a second perspective of a water crack grouting retention rate testing device.

[0017] Figure 3 This is a partially enlarged structural schematic diagram of an underwater crack grout retention rate testing device.

[0018] Figure 4 This is a schematic diagram of the connection structure between the main pipe and the branch pipe in an underwater crack grout retention rate testing device.

[0019] Figure 5 This is a third-view structural schematic diagram of an underwater crack grout retention rate testing device.

[0020] Figure 6 This is a schematic diagram of the connection structure between the electric telescopic rod and the motor in an underwater crack grout retention rate testing device.

[0021] Figure 7 This is a schematic diagram of the internal structure of the purification tank in an underwater crack grout retention rate testing device.

[0022] In the diagram: 1. Support assembly; 2. Test platform; 3. Test chamber; 4. Water supply tank; 5. Grouting tank; 6. Inlet pipe; 7. Drainage pipe; 8. Purified water tank; 9. Return water pipe; 10. Height adjustment assembly; 11. Grouting pipe; 12. Support rod; 13. Support sleeve; 14. Support column; 15. Locking bolt; 16. Inlet pump; 17. Main pipe; 18. Branch pipe; 19. First screw; 20. Guide column; 21. Power unit; 22. Model placement platform; 23. Tie rod; 24. Second screw; 25. Transmission plate; 26. Weighing sensor; 27. Drive motor; 28. Drive gear; 29. ​​First driven gear; 30. Second driven gear; 31. Electric telescopic rod; 32. Guide bracket; 33. Longitudinal partition; 34. First filter element; 35. Second filter element; 36. Return water pump. Detailed Implementation

[0023] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0024] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0025] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0026] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0027] Example 1: Please refer to Figure 1 , Figure 2 and Figure 3 An underwater crack grout retention rate testing device includes a support assembly 1 and a test platform 2 fixed on the support assembly 1. A test chamber 3, a water supply tank 4, and a grouting tank 5 are arranged on the test platform 2. The water supply tank 4 is located on the side of the test chamber 3 and is connected to the test chamber 3 via an inlet pipe 6. A purified water tank 8 is connected to the other side of the test chamber 3 via a drain pipe 7, and the purified water tank 8 is connected to the water supply tank 4 via a return water pipe 9. The grouting tank 5 is connected to a height adjustment assembly 10, and a grouting pipe 11 is connected to the side of the grouting tank 5, with its end located at the test chamber 3. The support assembly 1 includes a support rod 12, a support sleeve 13 fixedly connected to the support rod 12, and a support column 14 slidably connected inside the support sleeve 13. The support column 14 is fixedly connected to the test platform 2, and a locking bolt 15 for locking the position of the support column 14 is threadedly connected to the side of the support sleeve 13.

[0028] Support assembly 1 provides a stable foundation for the entire device. By loosening the locking bolts 15 on the side of the support sleeve 13 on the support rod 12, the support column 14 can be slid up and down to adjust the test platform 2 to a level height that meets operational requirements. Then, tightening the locking bolts 15 locks the position of the support column 14, ensuring that the platform does not wobble during the test. Test box 3 is used to place the model inside to simulate underwater cracks. Water supply tank 4 is used to provide water flow to simulate the flow of groundwater. Grouting tank 5 is used to simulate grouting equipment to fill cracks. By comparing the weight change of the model before and after grouting, the mass of the retained grout is obtained, thereby calculating the retention rate.

[0029] Please see Figure 4 A water pump 16 is connected to the middle of the water inlet pipe 6. The end of the water inlet pipe 6 includes a main pipe 17 and several branch pipes 18 connected to the main pipe 17. The branch pipes 18 are connected to different positions on the side of the test chamber 3. By setting up several branch pipes 18, the water flow entering the test chamber 3 is made closer to the natural state, avoiding excessive local impact force of the water flow and improving the accuracy of the test results.

[0030] Example 2: This example is improved upon the previous example as follows: Please refer to... Figure 5 and Figure 6 The height adjustment assembly 10 includes a first screw 19 and a guide column 20. One side of the grouting box 5 is threadedly connected to the first screw 19, and the other side of the grouting box 5 is slidably connected to the guide column 20. The bottom of the first screw 19 is drivenly connected to the power unit 21. The height adjustment assembly 10 is used to adjust the height of the grouting box 5. Different heights result in different grout pressures, thereby testing the retention rate under different grouting pressures to obtain more test data.

[0031] The grouting box 5 is longitudinally slidably connected to a model placement platform 22. A pull rod 23 is fixedly connected to the side of the model placement platform 22. A second screw 24 is rotatably connected to the test platform 2. A transmission plate 25 is threadedly connected to the side of the second screw 24. A weighing sensor 26 is connected between the pull rod 23 and the transmission plate 25. The bottom of the second screw 24 is connected to the power unit 21 for transmission.

[0032] The rotation of the second screw 24 drives the model placement platform 22 to rise and fall through the transmission plate 25 and the pull rod 23. The model rising and falling is used to simulate the changes in groundwater level under natural conditions, and the retention rate of grout under different groundwater flow conditions can be obtained.

[0033] The power unit 21 includes a drive motor 27, with a drive gear 28 fixedly connected to the output shaft of the drive motor 27. A first driven gear 29 is fixedly connected to the bottom of the first screw 19, and a second driven gear 30 is fixedly connected to the bottom of the second screw 24. The drive gear 28 meshes with either the first driven gear 29 or the second driven gear 30. An electric telescopic rod 31 is also fixedly connected to the bottom of the test platform 2. The drive motor 27 is fixedly connected to the end of the electric telescopic rod 31. A guide bracket 32 ​​is fixedly connected to the side of the test platform 2, and the motor is slidably connected to the guide bracket 32.

[0034] During the extension and retraction of the electric telescopic rod 31, the position of the drive motor 27 changes. When the drive gear 28 meshes with the first driven gear 29 or the second driven gear 30, it drives the first screw 19 or the second screw 24 to rotate, thereby adjusting the height of the corresponding model placement platform 22 or grouting box 5.

[0035] Please see Figure 7 The purified water tank 8 has a longitudinal partition 33 fixedly connected inside. A first filter element 34 and a second filter element 35 are fixedly connected to both sides of the longitudinal partition 33, respectively. Through holes are evenly distributed on the longitudinal partition 33. A return water pump 36 is connected to the middle of the return water pipe 9. Water from the test chamber 3 flows into the purified water tank 8 through the drain pipe 7. The longitudinal partition 33 inside the purified water tank 8 divides the tank into two parts. The water passes through the first filter element 34 and the second filter element 35 in sequence, and then flows back to the supply water tank 4 under the action of the return water pump 36, forming a closed-loop water circulation system and improving the utilization rate of water resources.

[0036] After grouting is completed, the sample is left to stand for a period of time and the water inside the test chamber 3 is drained to ensure grout retention. Then, the weight difference of the model before and after the test is determined by the weighing sensor 26, and the grout retention rate is measured based on the total mass of grouting.

[0037] Working principle: At the bottom of the test platform 2, the electric telescopic rod 31 is fixedly connected to the drive motor 27, and drives the drive motor 27 to slide along the guide bracket 32 ​​to achieve meshing with different driven gears. The water pump 16 of the water inlet pipe 6 is started, and water from the water supply tank 4 is transported to the main pipe 17 through the pipe, and then evenly injected into the test chamber 3 through the branch pipe 18, simulating groundwater flow. To simulate dynamic water flow balance and prevent pollution, the water in the test chamber 3 flows into the purified water tank 8 through the drain pipe 7, is filtered by the filter element, and then returns to the water supply tank 4 under the action of the return water pump 36, forming a closed-loop water circulation.

[0038] The extension and retraction of the electric telescopic rod 31 causes the driving gear 28 to mesh with the second driven gear 30 at the bottom of the second screw 24. At this time, the drive motor 27 is turned on, which drives the model placement platform 22 to change its position, simulating the flow of groundwater at different levels.

[0039] When the driving gear 28 meshes with the first driven gear 29, the height of the grouting box 5 can be adjusted by the first screw 19 to simulate different grouting pressures and test the retention rate.

[0040] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0041] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A device for testing the retention rate of underwater crack grouting, comprising a support assembly (1) and a test platform (2) fixed on the support assembly (1), characterized in that, The test platform (2) is equipped with a test box (3), a water supply tank (4) and a grouting box (5). The water supply tank (4) is located on the side of the test box (3). The water supply tank (4) is connected to the test box (3) through the water inlet pipe (6). The other side of the test box (3) is connected to a purification water tank (8) through the drainage pipe (7). The purification water tank (8) is connected to the water supply tank (4) through the return water pipe (9). The grouting box (5) is connected to the height adjustment component (10). The side of the grouting box (5) is connected to a grouting pipe (11). The end of the grouting pipe (11) is located at the test box (3).

2. The underwater crack grout retention rate testing device according to claim 1, characterized in that, The support assembly (1) includes a support rod (12), a support sleeve (13) is fixedly connected to the support rod (12), a support column (14) is slidably connected inside the support sleeve (13), the support column (14) is fixedly connected to the test platform (2), and a locking bolt (15) for locking the position of the support column (14) is threadedly connected to the side of the support sleeve (13).

3. The underwater crack grout retention rate testing device according to claim 1, characterized in that, The water inlet pipe (6) is connected to a water inlet pump (16) in the middle. The end of the water inlet pipe (6) includes a main pipe (17) and several branch pipes (18) connected to the main pipe (17). The branch pipes (18) are connected to different positions on the side of the test box (3).

4. The underwater crack grout retention rate testing device according to claim 1, characterized in that, The height adjustment assembly (10) includes a first screw (19) and a guide column (20). One side of the grouting box (5) is threadedly connected to the first screw (19), and the other side of the grouting box (5) is slidably connected to the guide column (20). The bottom of the first screw (19) is connected to the power unit (21) for transmission.

5. The underwater crack grout retention rate testing device according to claim 4, characterized in that, The grouting box (5) is longitudinally slidably connected to a model placement platform (22), and a pull rod (23) is fixedly connected to the side of the model placement platform (22). A second screw (24) is rotatably connected to the test platform (2), and a transmission plate (25) is threadedly connected to the side of the second screw (24). A weighing sensor (26) is connected between the pull rod (23) and the transmission plate (25). The bottom of the second screw (24) is connected to the power unit (21) for transmission.

6. The underwater crack grout retention rate testing device according to claim 4 or 5, characterized in that, The power unit (21) includes a drive motor (27), a drive gear (28) is fixedly connected to the output shaft of the drive motor (27), a first driven gear (29) is fixedly connected to the bottom of the first screw (19), and a second driven gear (30) is fixedly connected to the bottom of the second screw (24). The drive gear (28) meshes with the first driven gear (29) or the second driven gear (30).

7. The underwater crack grout retention rate testing device according to claim 6, characterized in that, The bottom of the test platform (2) is also fixedly connected to an electric telescopic rod (31), the drive motor (27) is fixedly connected to the end of the electric telescopic rod (31), and a guide bracket (32) is fixedly connected to the side of the test platform (2), and the motor is slidably connected to the guide bracket (32).

8. The underwater crack grout retention rate testing device according to claim 1, characterized in that, The purified water tank (8) is internally fixedly connected to a longitudinal partition (33), and a first filter element (34) and a second filter element (35) are fixedly connected to both sides of the longitudinal partition (33). Through holes are evenly distributed on the longitudinal partition (33).

9. The underwater crack grout retention rate testing device according to claim 1, characterized in that, A return water pump (36) is connected in the middle of the return water pipe (9).

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