Foundation pit dewatering water level monitoring control device

Abstract

The utility model discloses a foundation pit dewatering water level monitoring control device which comprises a vertical rod, a water level controller, a water pump, a water pump switch and a three-phase alternating current contactor. The water level controller is provided with a first sensor, a second sensor and a third sensor which are used in a matched mode and electrically connected and sequentially fixed to the vertical rod from top to bottom through hoops, the third sensor is arranged at the bottom of a foundation pit and monitors the water level of the bottom of the foundation pit, the first sensor determines the water level line of water pumping at the beginning, and the second sensor determines the water level line of water pumping closing. After the water level is not sensed, the water level controller controls the water pump switch to automatically close the water pump to stop pumping water. According to the utility model, the water level can be stably monitored through the cooperation of the vertical rod and the water level controller, and the defect of unstable floating type water level monitoring is avoided; furthermore, the vertical rod can be supported in an auxiliary mode through the supporting mechanism, the vertical rod is kept vertical and stable, the settling speed of the vertical rod is reduced, and the accuracy and stability of monitoring results are improved.

Description

Technical Field

[0001] This utility model belongs to the field of foundation pit dewatering monitoring technology, and specifically relates to a foundation pit dewatering water level monitoring and control device. Background Technology

[0002] In foundation pit construction, groundwater issues are a frequent problem, affecting not only construction progress but also potentially the stability of the pit. Therefore, using water pumps for dewatering has become a standard construction procedure. However, traditional water pumps lack intelligent control during the pumping process, making them prone to running dry and burning out the motor, resulting in high repair costs. Therefore, there is an urgent need to innovate intelligent methods to improve the safety and efficiency of water pump operation, thereby reducing equipment wear and maintenance costs.

[0003] A search revealed an existing technology announcement number CN 219196011 U for an automatic dewatering and water level monitoring device for foundation pits. This device uses a buoyancy component to automatically detect the water level and is connected to a trigger rod via a traction cable. When the water level is below a safe height, the buoyancy component pulls the trigger rod upward, thus stopping the pump. When the water level is above a safe height, the traction cable loosens, and the trigger rod triggers a switch by its own gravity, thereby starting the pump. This allows for the automatic opening and closing of the pump, with the buoyancy component being pulled by the traction cable.

[0004] This solution has significant drawbacks. First, the buoyancy components need to be lightweight to float on the water surface. Second, to ensure the buoyancy components float, the traction cable must be a soft and lightweight rope to minimize interference with the buoyancy components' buoyancy. Consequently, the buoyancy components will not float and remain fixed in one place as ideally as they would in the water level. In strong winds or rainy weather, they will drift with the wind and move on the water surface. Similarly, the larger the area of ​​the excavation pit, the greater the range of movement of the buoyancy components on the water surface. This will pull on the traction cable and trigger rod, causing the water pump to start and stop more frequently, increasing the load on the water pump motor or even burning it out, thus failing to achieve the effect of automatic start and stop pumping based on water level monitoring. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a pit dewatering water level monitoring and control device that can stably monitor the water level line through the cooperation of the upright and the water level controller, avoiding the drawbacks of unstable floating water level monitoring; furthermore, the support mechanism can provide auxiliary support for the upright, keep the upright vertical and stable, reduce the settlement speed of the upright, and improve the accuracy and stability of the monitoring results.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A pit dewatering water level monitoring and control device includes a pole, a water level controller, a water pump, a water pump switch, and a three-phase AC contactor. The water pump suction inlet is located inside the pit. The water pump switch is electrically connected to the water pump. The water level controller is equipped with a first sensor, a second sensor, and a third sensor, which are used in conjunction with and electrically connected to each other, and are fixed to the pole from top to bottom by clamps. The third sensor is located at the bottom of the pit to monitor the water level at the bottom of the pit, ensuring the effective operation of the water pump. The first sensor determines the initial water level line for pumping. When the set high water level is detected, the water level controller controls the water pump switch to automatically start. A water pump draws water to prevent water accumulation in the foundation pit. A second sensor determines the water level at which pumping should be stopped. If the water level is not detected, the water pump will not run dry to prevent the water level from being too low. The water level controller automatically shuts off the water pump to stop pumping. The clamps are fastened to the uprights with bolts and can be adjusted up and down. The water level controller, three-phase AC contactor, and water pump switch are electrically connected to each other and are located in the control cabinet. A support plate is provided at the bottom of the upright, and a cone is provided at the bottom of the support plate. The support plate and the cone work together to stabilize the position of the upright and prevent premature settlement of the upright, which would cause unstable monitoring data.

[0008] Preferably, the upright has a through hole, which can be used to fix it to the base column by means of expansion bolts or wires.

[0009] Preferably, the support plate is provided with a through groove and a first ear plate. A hinged support plate is provided in the through groove. The support plate is provided with an arc-shaped fixing arm that is hinged to the through groove. The fixing arm is provided with a second ear plate and an insertion hole. When the support plate fits and wraps around the cone head, the end of the fixing arm is inserted and fixed to the first ear plate by a pin. In order to increase the supporting force of the support plate, the second ear plate is inserted and fixed by rotating the fixing arm, thereby making the support plate parallel to the support plate and increasing the supporting area, and reducing the settlement speed.

[0010] Furthermore, the upright is provided with several sets of support mechanisms, including a first support arm, a second support arm, and a first L-shaped plate; the first L-shaped plate is fixed to the upright, the first support arm is rotatably connected to the first L-shaped plate through a pin, the second support arm is slidably connected to the first support arm and can be locked to each other; the end of the first support arm is provided with a support plate, the support plate is provided with a first insertion hole and a second insertion hole; the two sides of the first support arm are provided with limiting plates, the limiting plates are provided with sliding grooves, the side of the first support arm is provided with a third insertion hole and several sets of limiting grooves.

[0011] The second arm has a second L-shaped plate at its end, on which a slidingly connected insert shaft and a fixed shaft are provided. The fixed shaft is inserted into a third insertion hole to fix the first and second arms together and prevent them from sliding. The insert shaft has a wedge-shaped block at its end, and a spring is fitted on the insert shaft. The spring pushes the wedge-shaped block. There is a set of sliding shafts on each side of the end of the second arm, which are located in a sliding groove to allow the second arm to slide on the surface of the first arm. The bottom of the second arm has a baffle plate with a groove at its bottom to provide greater resistance when inserted into the bottom of the pit.

[0012] The advantages of this utility model compared with the prior art are as follows:

[0013] 1) In this solution, the water level can be stably monitored by a water level controller fixed on the pole, avoiding the drawbacks of unstable floating water level monitoring; furthermore, the replacement mechanism can provide auxiliary support for the pole, keeping the pole vertical and ensuring the accuracy and stability of the monitoring results.

[0014] 2) When the upright is inserted into the foundation pit, it can be fixed to the foundation column through the through hole with expansion bolts or wires to maintain stability. In the foundation pit without foundation column, it can also be directly inserted into the foundation pit and fixed with the help of support plate and cone head. In order to further ensure the vertical stability of the upright, the upright can also be supported by the support mechanism.

[0015] When using the support mechanism, firstly, remove the pin from the first L-shaped plate and the second insertion hole, and then insert the first L-shaped plate and the first insertion hole through the pin. This allows the first arm to be kept away from the outer wall of the upright, preventing the end of the first arm from touching the upright and limiting the rotation angle when rotating around the pin. Then, determine the support angle of the first arm and remove the fixed shaft. The second arm slides down the slide along the groove under its own weight. The wedge block will be pushed into the limiting groove by the spring. The use of the wedge block can ensure that the second arm slides down smoothly and prevent the second arm from sliding upward when it touches the pit. Thus, the first arm and the second arm achieve auxiliary support and stability for the upright.

[0016] When the pole is removed from the pit after use and is recycled, the wedge block is lifted and the second support arm is slid up to reset. Then, the second L-shaped plate is fixed by inserting it into the third insertion hole through the fixed shaft. Then, the first L-shaped plate is inserted into the second insertion hole so that the first support arm fits against the pole for easy retraction. Then, the pole and support mechanism are tied together with ropes. It is convenient, quick and easy to transport.

[0017] 3) When working in the foundation pit, if the water level exceeds the first sensor, the water level controller controls the water pump switch to start the water pump to pump water. After the second sensor no longer detects the water level, the water level controller controls the water pump switch to shut off the water pump, avoiding excessive pumping and causing the water pump to run dry. This can achieve automated control, and the water pump can start and stop intelligently without human intervention, improving efficiency and safety, and avoiding the situation where the water pump runs dry due to frequent or inadequate manual observation. Attached Figure Description

[0018] Appendix Figure 1 This is a schematic diagram of the structure of a foundation pit dewatering water level monitoring and control device according to the present invention;

[0019] Appendix Figure 2This is a structural diagram of the pole, the first sensor, the second sensor, and the third sensor;

[0020] Appendix Figure 3 This is a schematic diagram of the second arm;

[0021] Appendix Figure 4 This is a schematic diagram of the first arm;

[0022] Appendix Figure 5 This is a structural diagram of the support plate and support disk;

[0023] Appendix Figure 6 This is a diagram illustrating the effect of using the support plate;

[0024] Appendix Figure 7 This is a schematic diagram of the support plate structure;

[0025] Appendix Figure 8 This is a schematic diagram showing the uprights and support mechanism in operation.

[0026] In the diagram: 1. Upright pole; 101. Through hole; 102. Clamp; 103. Support plate; 104. Conical head; 11. Through groove; 12. First ear plate; 13. Support plate; 131. Fixed arm; 132. Second ear plate; 2. First sensor; 3. Second sensor; 4. Third sensor; 5. Water level controller; 6. Three-phase AC contactor; 7. Water pump switch; 701. Control cabinet; 8. Water pump; 9. Support mechanism; 91. First support arm; 92. Second support arm; 93. First L-shaped plate; 911. Support plate; 912. First insertion hole; 913. Second insertion hole; 914. Limiting plate; 915. Slide groove; 916. Limiting groove; 917. Third insertion hole; 921. Slide shaft; 922. Second L-shaped plate; 923. Insertion shaft; 924. Wedge block; 925. Spring; 926. Fixed shaft; 927. Block plate; 928. Groove. Detailed Implementation

[0027] To facilitate understanding by those skilled in the art, the following is in conjunction with the appendix. Figure 1-8 The technical solution of this utility model will be further described in detail below.

[0028] Example 1:

[0029] A pit dewatering water level monitoring and control device includes a pole 1, a water level controller 5, a water pump 8, a water pump switch 7, and a three-phase AC contactor 6. The water pump suction port is located inside the pit. The water pump switch is electrically connected to the water pump. The water level controller 5 is equipped with a first sensor 2, a second sensor 3, and a third sensor 4, which are used in conjunction with and electrically connected to the pole 1 and are sequentially fixed from top to bottom by clamps 102. The third sensor 4 is located at the bottom of the pit to monitor the water level at the bottom of the pit, ensuring the effective operation of the water pump 8. The first sensor 2 determines the initial water level for pumping. When the set high water level is detected, the water level controller 5 controls the water pump switch 7 to automatically start the water pump 8 to pump water, preventing water accumulation in the pit. The second sensor 3 determines... After the water level line for pumping is closed, and the water level is not detected, to prevent the water pump 8 from running dry due to low water level, the water level controller 5 controls the water pump switch 7 to automatically shut off the water pump 8 to stop pumping. The clamp 102 is fastened to the upright 1 with bolts and can be adjusted up and down. The water level controller 5, the three-phase AC contactor 6, and the water pump switch 7 are electrically connected to each other and are located in the control cabinet 701. The bottom of the upright 1 is provided with a support plate 103, and the bottom of the support plate 103 is provided with a cone head 104. The support plate 103 and the cone head 104 work together to stabilize the position of the upright 1 and prevent the upright 1 from settling too early, which would cause the monitoring data to be unstable. The water level controller 5 is purchased from the market or customized, and the model is HDL300.

[0030] The upright 1 is provided with a through hole 101, which can be fixed to the base column by means of expansion bolts or wires.

[0031] The support plate 103 is provided with a through groove 11 and a first ear plate 12. A hinged support plate 13 is provided in the through groove 11. An arc-shaped fixing arm 131 is provided on the support plate 13, which is hinged to the through groove 11. A second ear plate 132 and an insertion hole are provided on the fixing arm 131. When the support plate 13 fits and wraps around the cone head 104, the end of the fixing arm 131 is inserted and fixed to the first ear plate 12 through a pin. In order to increase the supporting force of the support plate 13, the second ear plate 132 is inserted and fixed to the first ear plate 12 by rotating the fixing arm 131, thereby making the support plate 13 parallel to the support plate 103 and increasing the supporting area, thus reducing the settling speed.

[0032] Example 2: Based on Example 1;

[0033] The upright 1 is provided with several sets of support mechanisms 9, including a first support arm 91, a second support arm 92, and a first L-shaped plate 93; the first L-shaped plate 93 is fixed on the upright 1, the first support arm 91 is rotatably connected to the first L-shaped plate 93 through a pin, and the second support arm 92 is slidably connected to the first support arm 91 and can be locked to each other; the end of the first support arm 91 is provided with a support plate 911, and the support plate 911 is provided with a first insertion hole 912 and a second insertion hole 913; the two sides of the first support arm 91 are provided with limiting plates 914, the limiting plates 914 are provided with sliding grooves 915, the side of the first support arm 91 is provided with a third insertion hole 917 and several sets of limiting grooves 916.

[0034] The second arm 92 has a second L-shaped plate 922 at its end. The second L-shaped plate 922 has a slidingly connected insert shaft 923 and a fixed shaft 926. The fixed shaft 926 is inserted into the third insertion hole 917 to fix the first arm 91 and the second arm 92 together and prevent them from sliding. The insert shaft 923 has a wedge block 924 at its end. The insert shaft 923 has a sleeved spring 925. The spring 925 pushes the wedge block 924. The second arm 92 has a set of sliding shafts 921 on each side of its end. The sliding shafts 921 are located in the sliding groove 915 so that the second arm 92 can slide on the surface of the first arm 91. The bottom of the second arm 92 has a baffle plate 927. The bottom of the baffle plate 927 has a groove 928 to provide greater resistance when inserted into the bottom of the pit.

[0035] In the description of this utility model, unless otherwise stated, the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0036] In summary, the electronic or electrical components, including but not limited to sensors, water level controllers, three-phase AC contactors, water pump switches, and motors, are existing components that were custom-made or purchased. The electrical connections between these components are conventional circuit or electrical connections in the prior art and are not within the scope of protection of this invention.

[0037] The above description is merely an example and illustration of the structure of this utility model. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the structure of the utility model or exceed the scope defined in the claims, they should all fall within the protection scope of this utility model.

Claims

1. A foundation pit dewatering water level monitoring and control device, comprising a pole, a water level controller, a water pump, a water pump switch, and a three-phase AC contactor; characterized in that... The water pump suction inlet is located inside the foundation pit. The water pump switch is electrically connected to the water pump. The water level controller is equipped with a first sensor, a second sensor, and a third sensor, which are used in conjunction with and electrically connected to each other. These sensors are fixed to the uprights from top to bottom by clamps. The third sensor is located at the bottom of the pit to monitor the water level at the bottom of the foundation pit, ensuring that the water pump works effectively. The first sensor determines the water level line at the beginning of pumping. When the set high water level is detected, the water level controller controls the water pump switch to automatically start the water pump to pump water, preventing water accumulation in the foundation pit. The second sensor determines the water level line to stop pumping. When the water level line is no longer detected, to prevent the water level from being too low and causing the water pump to run dry, the water level controller controls the water pump switch to automatically shut off the water pump to stop pumping. The clamps are fastened to the uprights by bolts and can be adjusted up and down. The water level controller, the three-phase AC contactor, and the water pump switch are electrically connected to each other and are located in the control cabinet. A support plate is provided at the bottom of the uprights, and the bottom of the support plate has a cone.

2. The foundation pit dewatering water level monitoring and control device according to claim 1, characterized in that... The upright has a through hole.

3. The foundation pit dewatering water level monitoring and control device according to claim 1, characterized in that... The support plate is provided with a through groove and a first ear plate. A hinged support plate is provided in the through groove. An arc-shaped fixing arm with a hinged through groove is provided on the support plate. The fixing arm is provided with a second ear plate and an insertion hole. When the support plate fits and wraps around the cone head, the end of the fixing arm is inserted and fixed to the first ear plate through a pin. In order to increase the supporting force of the support plate, the second ear plate is inserted and fixed by rotating the fixing arm, thereby making the support plate parallel to the support plate and increasing the supporting area, and reducing the settlement speed.

4. The foundation pit dewatering water level monitoring and control device according to claim 1, characterized in that... The upright is equipped with several sets of support mechanisms, including a first arm, a second arm, and a first L-shaped plate. The first L-shaped plate is fixed to the upright, the first arm is rotatably connected to the first L-shaped plate via a pin, and the second arm is slidably connected to the first arm and can be locked together. The end of the first arm is equipped with a support plate, which has a first insertion hole and a second insertion hole. Limiting plates are provided on both sides of the first arm, which have sliding grooves. The side of the first arm is equipped with a third insertion hole and several sets of limiting grooves. The second arm has a second L-shaped plate at its end, on which a slidingly connected insert shaft and a fixed shaft are provided. The fixed shaft is inserted into a third insertion hole to fix the first arm and the second arm in place so that they no longer slide. The insert shaft has a wedge-shaped block at its end, and a spring is fitted on the insert shaft. The spring pushes the wedge-shaped block. A set of sliding shafts is provided on each side of the end of the second arm. The sliding shafts are located in the sliding groove so that the second arm slides on the surface of the first arm. The bottom of the second arm has a baffle plate with a groove at its bottom.

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