Water conservancy foundation pit water level monitoring equipment

Abstract

The application relates to the technical field of water conservancy water level monitoring, in particular to a water conservancy foundation pit water level monitoring device which has the characteristics of improving the precision and stability of water level monitoring and comprises a mounting plate and a fixing mechanism. A measuring rod penetrates through the inside of the fixing mechanism, the bottom end of the measuring rod is fixedly connected with a floating plate, sliding mechanisms are arranged on the two sides of the floating plate, a side plate is arranged on one side of the sliding mechanism, two groups of extension plates are arranged on the side wall of the side plate, a through hole one is formed in the middle of each extension plate, and a bolt one penetrates through the through holes one of the two groups of extension plates. The side wall of the extension plate is provided with a shielding plate. A through hole two is formed in the bottom of the shielding plate, a turbulence tube is arranged above the through hole two. A fixing plate is arranged in the inside of the shielding plate, a through hole three is formed in the middle of the fixing plate, a bolt two penetrates through the through hole three in the middle of the fixing plate, and a top plate is threadedly installed on the lower part of the bolt two. A force relieving assembly is arranged in the middle of the top plate, and an impact plate is arranged on the lower part of the force relieving assembly.

Description

Technical Field

[0001] This invention relates to the field of water level monitoring technology, specifically to a water level monitoring device for a water foundation pit. Background Technology

[0002] When conducting dewatering construction on foundation pits in urban building complexes, to ensure the safety of existing buildings and underground pipelines outside the pit, it is essential to ensure that the groundwater level outside the pit does not drop below the permissible safe range. Once the groundwater level falls below the safety line, dewatering must be immediately stopped, or groundwater recharge must be carried out outside the pit to ensure the safety of existing buildings. Therefore, it is necessary to monitor the groundwater level outside the foundation pit and near existing buildings. Existing hydraulic foundation pit water level monitoring equipment can only monitor water level values, requiring constant monitoring by personnel to understand changes in the water level. It lacks alarm functions, making it very inconvenient to use. Alternatively, detection equipment with alarm functions may have difficulty adjusting the water level alarm threshold as needed.

[0003] Chinese Utility Model Publication No. CN220339470U discloses a water level monitoring device for a hydraulic foundation pit, including a mounting plate. Two fixing plates are fixedly connected to the front of the mounting plate. A solar panel is fixedly connected to the top of the mounting plate. A first conductive sheet is fixedly connected to the inner surface of the top fixing plate, and a first alarm is fixedly connected to the bottom of the first conductive sheet. A second conductive sheet is fixedly connected to the inner surface of the bottom fixing plate, and a second alarm is fixedly connected to the top of the second conductive sheet. A fixing mechanism is fixedly connected to the front of the mounting plate, and a measuring rod passes through the interior of the fixing mechanism. A limit plate is fixedly connected to the top of the measuring rod, and a floating plate is fixedly connected to the bottom of the measuring rod. Sliding mechanisms are provided on both sides of the floating plate. Two sets of limit components are provided on the surface of the measuring rod. A battery is fixedly connected to the back of the mounting plate. Through the cooperation of the conductive sheets and the alarm, real-time monitoring of the water level in the foundation pit and high / low water level alarms can be achieved.

[0004] However, the floating plate of the device is directly exposed to the water. External wind disturbances, water waves generated by the passage of ships or the movement of aquatic organisms will continuously disturb the floating plate, causing it to float up and down frequently. This seriously affects the accuracy of water level measurement and makes it difficult to meet the high-precision requirements for water level monitoring during foundation pit dewatering construction. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a water level monitoring device for hydraulic foundation pits, which features improved accuracy and stability in water level monitoring.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a water level monitoring device for a hydraulic foundation pit, comprising a mounting plate and a fixing mechanism. A measuring rod is inserted through the fixing mechanism, and a floating plate is fixedly connected to the bottom end of the measuring rod. Sliding mechanisms are provided on both sides of the floating plate, and a side plate is inserted through one side of the sliding mechanism. Two sets of extension plates extend from the side wall of the side plate, and each extension plate has a through hole in its middle. A bolt passes through the through holes of both sets of extension plates. A shielding plate is provided on the side wall of the extension plate, which, in conjunction with the side plate, prevents... The floating plate provides cover; a second through hole is provided at the bottom of the cover plate, and a flow-dispersing pipe is provided above the second through hole, allowing external water to enter the flow-dispersing pipe through the second through hole at the bottom of the cover plate and be turbulent and slowed down by the flow-dispersing pipe; a fixing plate is provided inside the cover plate, and a third through hole is provided in the middle of the fixing plate, through which a second bolt passes, and a top plate is threaded on the lower part of the second bolt; a stress-relief component is provided in the middle of the top plate, and an impact plate is provided below the stress-relief component to reduce the water flow velocity in conjunction with the stress-relief component.

[0007] Furthermore, the impact plate is positioned directly above the baffle tube, and there is a gap between them.

[0008] Furthermore, the turbulence pipe includes a pipe body one, a pipe body two that is inclined at the upper part of the pipe body one to change the water flow, and a drainage pipe body three that is provided at the upper part of the pipe body two.

[0009] Furthermore, the area of ​​the impact plate is larger than the opening area of ​​the tube body three.

[0010] Furthermore, the stress-relieving assembly includes a guide tube disposed in the middle of the top plate, a rod installed inside the guide tube, a shock-absorbing spring disposed at one end of the rod inside the guide tube, and the other end of the shock-absorbing spring being connected to the side wall of the top plate.

[0011] Furthermore, a flange is provided at the upper end of the rod, and a bolt is provided through the flange. A threaded hole is provided on the side of the top plate facing the flange, which is adapted to the bolt. The bolt is threadedly connected to the threaded hole to fix the relative position of the rod and the top plate.

[0012] Furthermore, the shock-absorbing spring is a compression spring, and both ends of the shock-absorbing spring are welded and fixed to the end face of the rod and the side wall of the top plate, respectively.

[0013] Preferably, the rod body and the inner wall of the guide tube are in a damped sliding fit, and the resistance of the damped sliding is less than the maximum elastic force of the shock-absorbing spring.

[0014] Preferably, the outer wall of the impact plate is slidably fitted to the inner wall of the shielding plate.

[0015] Compared with the prior art, the present invention provides a water level monitoring device for hydraulic foundation pits, which has the following beneficial effects: This water level monitoring equipment for hydraulic foundation pits, through the coordinated operation of a flow-decelerating pipe, impact plate, rod, compression spring, and guide pipe, can perform multi-stage deceleration and buffering of the water flow entering the baffle plate and side plate. After the water flow is decelerated three times by the flow-decelerating pipe, it acts on the impact plate. The impact force is transmitted to the compression spring through the rod, where the spring's compression deformation absorbs the energy. The guide pipe ensures the smooth movement of the rod. This effectively weakens the impact of the water flow, making the internal water flow more stable, and thus smoothly supporting the floating plate as the water level rises and falls, improving the accuracy and stability of water level monitoring. Attached Figure Description

[0016] Figure 1 This is a three-dimensional schematic diagram of the present invention; Figure 2 This is a schematic diagram of the structure of the present invention; Figure 3 This is a three-dimensional schematic diagram of the present invention after the side plates have been removed and rotated at a certain angle; Figure 4 This is a three-dimensional schematic diagram of the cooperation between the shield and the baffle tube of the present invention; Figure 5 For the present invention Figure 2 The diagram shows a partially enlarged structural schematic at point A.

[0017] In the diagram: 1. Mounting plate; 2. Fixing mechanism; 3. Measuring rod; 4. Floating plate; 5. Sliding mechanism; 6. Side plate; 7. Bolt 1; 8. Baffle plate; 9. Bolt 2; 10. Top plate; 11. Impact plate; 12. Tube 1; 13. Tube 2; 14. Tube 3; 15. Guide tube; 16. Rod; 17. Compression spring. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] In the prior art, a water level monitoring device for a hydraulic foundation pit includes a mounting plate 1 and a fixing mechanism 2. A measuring rod 3 runs through the inside of the fixing mechanism 2. A floating plate 4 is fixedly connected to the bottom of the measuring rod 3. Sliding mechanisms 5 are provided on both sides of the floating plate 4. A first conductive sheet is fixedly connected to the inner surface of the fixing plate. A first alarm is fixedly connected to the bottom of the first conductive sheet. A second conductive sheet is fixedly connected to the inner surface of the bottom fixing plate. A second alarm is fixedly connected to the top of the second conductive sheet. A limit component is provided on the surface of the measuring rod 3. When the water level drops to a certain depth, the U-shaped plate with conductive function on the top side connects with the first conductive sheet, thereby forming a circuit between the first conductive sheets on both sides. This causes the first alarm to trigger a low water level alarm. Thus, through the setting of the first conductive sheet, the second conductive sheet, the first alarm, and the second alarm, not only can the water level inside the foundation pit be monitored in real time, but alarm processing can also be carried out in the case of low or high water levels, thereby promptly informing people of the water level situation in the foundation pit. This is the prior art and will not be elaborated further here.

[0020] Please see Figure 1 The present invention discloses a water level monitoring device for a hydraulic foundation pit. A side plate 6 is provided through one side of a sliding mechanism 5. The side wall of the side plate 6 extends outward to form two sets of symmetrically distributed extension plates. The two sets of extension plates are arranged in parallel and corresponding in position. A through hole is precisely opened in the middle of each extension plate. A bolt 7 passes through the through hole of the two sets of extension plates from top to bottom, and the two sets of extension plates are fixedly connected by thread locking.

[0021] A baffle plate 8 is fixedly installed on the side wall of the extension plate. The baffle plate 8 and the side plate 6 form an enclosing structure, which can completely cover the floating plate 4 and effectively prevent the floating plate 4 from being disturbed by the external environment or directly impacted by the water flow. A through hole 2 is opened at the bottom of the baffle plate 8. A flow-dispersing pipe is vertically installed directly above the through hole 2. The flow-dispersing pipe and the through hole 2 are coaxially distributed. External water can smoothly enter the interior of the flow-dispersing pipe through the through hole 2. The flow-dispersing structure inside the flow-dispersing pipe achieves the turbulence and deceleration of the water flow, and initially reduces the impact force of the water flow on the mechanism.

[0022] Please see Figure 3 A fixing plate is horizontally arranged inside the baffle plate 8. The fixing plate is tightly fitted and fixedly connected to the inner wall of the baffle plate 8. A through hole three adapted to bolt two 9 is opened in the middle of the fixing plate. After bolt two 9 passes through the through hole three of the fixing plate, a top plate 10 is installed at the bottom by threads. The top plate 10 can be fixed by bolt two 9. A force-relieving component is installed in the middle of the top plate 10. The lower part of the force-relieving component is fixedly connected to the impact plate 11. When the water flow, which has been slowed down by the turbulence pipe, acts on the impact plate 11, the impact plate 11 will transfer the force to the force-relieving component. The buffering effect of the force-relieving component further reduces the water flow velocity, ensuring the stable operation of the sliding mechanism 5 in the water flow environment, and facilitating the stable upward movement of the floating plate 4 for water level measurement.

[0023] The impact plate 11 is precisely positioned above the turbulence pipe, with the two coaxially aligned and spaced appropriately. The water flow, slowed down by the turbulence pipe, will flow smoothly through this gap and act on the impact plate 11, achieving secondary deceleration in conjunction with the force-relieving component, thus ensuring a buffering effect.

[0024] Please see Figure 2-3 The turbulence-inducing pipe is composed of three pipes connected in sequence: pipe body 12, pipe body 23, and pipe body 34. Pipe body 12 extends upward to guide external water to flow vertically upward. Pipe body 23 is inclined and connected to the upper part of pipe body 12. After the water enters the inclined pipe body 23 from pipe body 12, the flow direction changes and impacts the side wall of pipe body 23, achieving initial deceleration through the generated static pressure. Pipe body 34 extends upward and is connected to the upper part of pipe body 23. After the water flow is decelerated by pipe body 213, it enters pipe body 314 and the flow direction changes again, thus achieving secondary deceleration and effectively reducing the water flow velocity.

[0025] The area of ​​the impact plate 11 is larger than the opening area of ​​the pipe body 14, which can fully receive the water flow discharged through the pipe body 14, avoid water overflow, and ensure that the water flow fully acts on the impact plate 11, so as to maximize the buffering and deceleration effect in conjunction with the unloading component.

[0026] Please see Figure 4 The force-relieving assembly includes a guide tube 15 located in the middle of the top plate 10. A rod 16 is fitted inside the guide tube 15. The lower end of the rod 16 is fixedly connected to the impact plate 11, and the upper end extends into the guide tube 15 and is fitted with a shock-absorbing spring. The other end of the shock-absorbing spring is tightly connected to the side wall of the top plate 10, forming an elastic buffer structure. When water flows and impacts the impact plate 11, the impact force is transmitted to the shock-absorbing spring through the rod 16. The spring absorbs the energy of the water flow through compression deformation. At the same time, the guide tube 15 limits and guides the movement of the rod 16 to prevent deviation, thereby stably achieving the removal and buffering of the water flow impact force and further reducing the impact of the water flow on the mechanism.

[0027] Please see Figure 5 The upper end of the rod 16 is integrally formed with a flange, which is coaxially distributed with the rod 16, and several bolts are evenly arranged through the end face of the flange. On the side of the top plate 10 facing the flange, there are threaded holes that are completely matched with the number and specifications of the bolts. During installation, the bolts are passed through the reserved holes of the flange and screwed into the threaded holes. Through the threaded locking fit, the relative position of the rod 16 and the top plate 10 can be accurately fixed, preventing the rod 16 from axially shifting or shaking when subjected to the impact force of water flow.

[0028] The shock-absorbing spring is a compression spring 17, whose two ends are welded to the end face of the rod 16 extending into the guide tube 15 and the inner wall of the top plate 10, respectively. The connection structure is firm and highly stable. When the water flow impacts the impact plate 11 and causes the rod 16 to move axially, the compression spring 17 absorbs the impact force through its own compression deformation, thus achieving the function of force relief and buffering.

[0029] The rod 16 and the inner wall of the guide tube 15 adopt a damped sliding fit, with a uniform contact gap between them. This ensures that the rod 16 moves smoothly along the axial direction of the guide tube 15, preventing external water from seeping into the guide tube 15. At the same time, the resistance of this damped sliding is designed to be less than the maximum elastic force of the shock-absorbing spring. This not only prevents violent shaking when the rod 16 slides, but also ensures that the spring can fully compress and deform under force, effectively playing a buffering and force-dissipating role.

[0030] The outer wall of the impact plate 11 and the inner wall of the baffle plate 8 are in sliding fit, which can limit the radial displacement of the impact plate 11 and ensure that it is always accurately aligned with the pipe opening of the pipe body 14, thus ensuring a stable water flow buffering effect.

[0031] In summary, when using this hydraulic foundation pit water level monitoring equipment, the mounting plate 1 is fixed at the preset position of the foundation pit monitoring point, the fixing mechanism 2 is installed on the mounting plate 1, and then the measuring rod 3 is passed through the fixing mechanism 2, ensuring that the floating plate 4 at the bottom of the measuring rod 3 is stably suspended above the water surface of the foundation pit. The sliding mechanism 5 is installed on both sides of the floating plate 4, and the two sets of extension plates are locked by bolt 7 through the through hole 1 of the extension plate, so that the side plate 6 and the shielding plate 8 form an enclosing structure, completing the assembly and fixing of the sliding mechanism. The entire monitoring equipment is lowered into the foundation pit monitoring area, so that the floating plate 4 floats on the water surface of the foundation pit, and the through hole 2 at the bottom of the shielding plate 8 is immersed in water, ensuring that external water can enter the turbulence pipe through the through hole 2.

[0032] When the water level in the foundation pit changes, the floating plate 4 moves the measuring rod 3 along with the rise and fall of the water level. When the water level drops to a preset value, the U-shaped plate on the measuring rod 3 contacts the first conductive plate to form a circuit, triggering the first alarm to issue a low water level alarm. When the water level rises to a preset value, the U-shaped plate contacts the second conductive plate, triggering the second alarm to issue a high water level alarm. When the water flows, the water body changes direction and slows down three times through the turbulence pipe before acting on the impact plate 11. The impact force is transmitted to the compression spring 17 through the rod 16. The spring is compressed and deformed to absorb energy, achieving buffering and force relief, and ensuring stable operation of the equipment.

[0033] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A water level monitoring device for a hydraulic foundation pit, comprising a mounting plate (1) and a fixing mechanism (2), wherein a measuring rod (3) is inserted through the fixing mechanism (2), a floating plate (4) is fixedly connected to the bottom end of the measuring rod (3), and sliding mechanisms (5) are provided on both sides of the floating plate (4), characterized in that: A side plate (6) is provided through one side of the sliding mechanism (5). Two sets of extension plates are provided on the side wall of the side plate (6). A through hole is opened in the middle of each extension plate. A bolt (7) passes through the through hole of the two sets of extension plates. A shielding plate (8) is provided on the side wall of the extension plate, which cooperates with the side plate (6) to shield the floating plate (4). A through hole is opened at the bottom of the shielding plate (8). A turbulence pipe is provided above the through hole, allowing external water to pass through. The second through hole at the bottom of the baffle plate (8) enters the turbulence pipe, and the flow is slowed down by the turbulence pipe; a fixed plate is provided inside the baffle plate (8), and a third through hole is provided in the middle of the fixed plate. A second bolt (9) passes through the third through hole in the middle of the fixed plate, and a top plate (10) is threaded on the lower part of the second bolt (9); a stress relief component is provided in the middle of the top plate (10), and an impact plate (11) is provided at the lower part of the stress relief component to reduce the flow velocity of the water flow in conjunction with the stress relief component.

2. The water level monitoring equipment for hydraulic foundation pits according to claim 1, characterized in that: The impact plate (11) is positioned directly above the flow-dispersing tube, and there is a gap between the impact plate (11) and the flow-dispersing tube.

3. The water level monitoring equipment for hydraulic foundation pits according to claim 2, characterized in that: The turbulence pipe includes a pipe body one (12), a pipe body two (13) for changing the water flow is inclined at the upper part of the pipe body one (12), and a pipe body three (14) for draining water is provided at the upper part of the pipe body two (13).

4. The water level monitoring equipment for hydraulic foundation pits according to claim 1, characterized in that: The area of ​​the impact plate (11) is greater than the area of ​​the opening of the tube body (14).

5. The water level monitoring equipment for hydraulic foundation pits according to claim 3, characterized in that: The unloading assembly includes a guide tube (15) disposed in the middle of the top plate (10), a rod (16) is installed inside the guide tube (15), a shock-absorbing spring is provided at one end of the rod (16) inside the guide tube (15), and the other end of the shock-absorbing spring is connected to the side wall of the top plate (10).

6. The water level monitoring equipment for hydraulic foundation pits according to claim 5, characterized in that: The upper end of the rod (16) is provided with a flange, and a bolt is provided through the flange. The top plate (10) facing the flange has a threaded hole three that is compatible with the bolt three. The bolt three is threadedly connected to the threaded hole three to fix the relative position of the rod (16) and the top plate (10).

7. The water level monitoring equipment for hydraulic foundation pits according to claim 5, characterized in that: The shock-absorbing spring is a compression spring (17), and the two ends of the shock-absorbing spring are welded and fixed to the end face of the rod (16) and the side wall of the top plate (10), respectively.

8. The water level monitoring equipment for hydraulic foundation pits according to claim 5, characterized in that: The rod (16) and the inner wall of the guide tube (15) are in a damped sliding fit, and the resistance of the damped sliding is less than the maximum elastic force of the shock-absorbing spring.

9. The water level monitoring equipment for hydraulic foundation pits according to claim 1, characterized in that: The outer wall of the impact plate (11) is slidably attached to the inner wall of the shield plate (8).

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