Adaptive foundation pit water level measuring and controlling device

Abstract

The application provides a kind of adaptive foundation pit water level measuring and control device, including vacuum pump and water level height component, water level height component is located in pipe frame, the upper side of pipe frame is equipped with support frame, support frame is equipped with amplification component, water level height component includes float ball and force bar, amplification component includes pivot shaft, toothed plate and gear, float ball is used to detect water level state, force bar and pivot shaft are hinged, pivot shaft is rotatably arranged in support frame, gear is fixed on adjusting component, toothed plate and gear are engaged, adjusting component includes pressing plate and pressure sensor, gear is used to control pressing plate to be pressed on pressure sensor, pressure sensor is connected with vacuum pump through transmission control component.The application is designed ingeniously, can adapt to the change of water level height and the change of water level rising speed in foundation pit, timely adjust the parameters of vacuum pump, ensure the timely and efficient pumping, protect the safety of construction personnel, and has good economic benefit.

Description

Technical Field

[0001] This invention relates to the field of foundation pit technology, and in particular to an adaptive foundation pit water level measurement and control device. Background Technology

[0002] An excavation pit is a pit dug at the foundation design location according to the base elevation and foundation plane dimensions. Before excavation, it is necessary to consider the site conditions and groundwater data, and to carry out waterproofing and drainage work. Usually, the excavation pit wall support method supports the excavation pit and prevents the outer soil layer from collapsing. In addition, the well point method can be used to lower the groundwater level to avoid the water level from being too high and submerging the excavation pit.

[0003] In the prior art, application number CN201911253220.4 proposes a foundation pit water level detection device. This water level detection device is flexible in its use location, easy to carry and move to a new location, and has a simple detection procedure, which can intuitively observe the water level changes in the foundation pit.

[0004] However, it can only observe the water level and cannot adjust the vacuum pump to pump water based on the water level. In addition, the water level control of the foundation pit usually uses the buoyancy valve to judge the water level and pump water at the same time. It cannot judge the rate of water level rise. It can only operate when the water level reaches the set height. When the water level rises quickly, pumping water will not immediately lower the water level, which will affect the condition of the foundation pit. Based on this, we propose a control device for measuring the water level of the foundation pit. Summary of the Invention

[0005] This invention provides an adaptive foundation pit water level monitoring and control device, solving the problems of inaccurate water level monitoring in foundation pits, inability to adjust according to real-time water level changes, and inability to pump water efficiently and timely, thus failing to ensure environmental stability within the foundation pit. To address these technical problems, the technical solution adopted by this invention is: an adaptive foundation pit water level monitoring and control device, comprising a vacuum pump and a water level height component. The water level height component is located within a pipe rack, with a support frame on the upper side of the pipe rack. An amplification component is located within the support frame. The water level height component includes a float and a force transmission rod. The amplification component includes a pivot shaft, a gear plate, and a gear. The float is used to detect the water level status. The force transmission rod and the pivot shaft are hinged. The pivot shaft is rotatably mounted within the support frame. The gear is fixed to an adjustment component, and the gear plate and gear are meshed together. The adjustment component includes a pressure plate and a pressure sensor. The gear controls the pressure plate to press against the pressure sensor. The pressure sensor is connected to the vacuum pump via a transmission control component.

[0006] In the preferred embodiment, a top plate is provided on the lower side of the force transmission rod, the top plate is connected to a float via a pull rod, a first spring is sleeved on the force transmission rod, a strip groove is provided on the lower side of the tube frame, the tube frame is connected to a vacuum pump via a bracket, and a contact switch is provided on the side of the top plate facing the force transmission rod.

[0007] In the preferred embodiment, the top of the force transmission rod is provided with a first sleeve, the upper part of the first sleeve is provided with a second hinge joint, the two sides of the pivot shaft are respectively provided with first telescopic rods, the end of the first telescopic rod near the pipe rack is provided with a first hinge joint, and the first hinge joint and the second hinge joint are hinged together.

[0008] In a preferred embodiment, a first telescopic rod is provided on one side of the pivot shaft, and a slide is provided at the end of the first telescopic rod, with the toothed plate fixed on the toothed plate.

[0009] In a preferred embodiment, the adjustment assembly includes a rotating shaft, with bearings and a support frame connecting the two sides of the rotating shaft respectively. A gear is sleeved on the rotating shaft, and a circular ring and a connecting ring are provided in the middle of the rotating shaft. The circular ring is connected to the rotating shaft through a guide rod, and a slider is slidably mounted on the guide rod. The slider is connected to the connecting ring through a linkage rod, and the connecting ring is rotatably mounted on the sliding ring. The sliding ring is fixed to the inner side of the support frame through a second telescopic rod, and a pressure plate is located on the lower side of the sliding ring.

[0010] In the preferred embodiment, a second spring is provided between the slider and the rotating shaft. The second spring is sleeved on the guide rod. The two sides of the linkage rod are respectively hinged to the slider and the connecting ring. A follower plate is inserted into the bottom of the sliding ring. The follower plate is connected to the pressure plate through a third spring.

[0011] In the preferred embodiment, the guide rod is provided with grooves on both sides, a flying disc is fitted on the guide rod, the flying disc is provided with symmetrical protrusions, the protrusions and the grooves are slidably connected, and the flying disc is also provided with a fixing groove for fixing the second spring.

[0012] In a preferred embodiment, a second sleeve is provided in the middle of the guide rod, a first threaded hole is provided through the second sleeve, a second threaded hole is provided in the upper part of the rotating shaft, and a screw is inserted into the first threaded hole and the second threaded hole.

[0013] In the preferred embodiment, the connecting ring is connected to the sliding ring via a connecting component. The connecting ring is provided with a force transmission groove. The connecting component includes two opposing semi-ring clamps. The inner side of the semi-ring clamps is provided with an alignment groove. The semi-ring clamps and the connecting ring are engaged. An extension plate is provided on one side of the alignment groove. The extension plate is provided with a through hole. The sliding ring is provided with a third threaded hole. Screws are inserted into the through hole and the third threaded hole.

[0014] In the preferred embodiment, the bottom of the semi-ring clamp is provided with a contact surface, and the contact surface is provided with a plug and a locking hole respectively. A step is provided between the extension plate and the semi-ring clamp. A retaining ring is provided on the upper part of the sliding ring, and a relief groove is provided on one side of the retaining ring. The third threaded hole is evenly distributed on the retaining ring along the circumference.

[0015] The beneficial effects of this invention are as follows: This invention uses a float to sense and monitor the water level in the foundation pit, then uses an amplification component to adjust the water level changes, and then transmits the data to an adjustment component. The linear motion of the float along the height direction is transformed into the circular motion of the rotating shaft. The adjustment component then converts the circular motion into linear motion. The pressure sensor then converts the pressure signal into a drive signal based on the change of the follower plate. The speed of the vacuum pump is controlled by the transmission control component, thereby adapting to the rising speed of the water level in the foundation pit, ensuring sensitive and efficient pumping, and requiring no personnel to be on duty throughout the process, thus ensuring the safety of the operators. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 This is a schematic diagram of the pipe rack connection enlargement assembly structure of the present invention;

[0019] Figure 3 This is a schematic diagram of the adjustment component structure of the present invention, state one;

[0020] Figure 4 This is a schematic diagram of the adjustment component structure of the present invention, state two;

[0021] Figure 5 This is a schematic diagram of the internal structure of the water level height component of the present invention, state one;

[0022] Figure 6 This is a schematic diagram of the internal structure of the water level height component of the present invention, state two;

[0023] Figure 7 This is a schematic diagram of the follower plate's movement structure according to the present invention;

[0024] Figure 8 This is a schematic diagram showing the connection between the enlarged component and the force transmission rod inside the support frame of the present invention;

[0025] Figure 9 yes Figure 8 A schematic diagram of the exploded structure;

[0026] Figure 10 This is a schematic diagram of the adjustment component structure of the present invention, state three;

[0027] Figure 11 yes Figure 10 A top-down view;

[0028] Figure 12 yes Figure 10 Front view diagram;

[0029] Figure 13 yes Figure 10 A left-view diagram;

[0030] Figure 14 yes Figure 10 Schematic diagram of the exploded structure, state one;

[0031] Figure 15 yes Figure 10 Schematic diagram of the exploded structure, state two;

[0032] Figure 16 This is a schematic diagram of the rotating shaft mounting connecting ring and sliding ring structure of the present invention;

[0033] Figure 17 yes Figure 16 Schematic diagram of the exploded structure, state one;

[0034] Figure 18 yes Figure 16 The schematic diagram of the explosion structure, state two.

[0035] In the diagram: 1. Pipe rack; 2. Strip groove; 3. Bracket; 4. Vacuum pump; 5. Support frame; 6. Water level assembly; 601. Float; 602. Tie rod; 603. Top plate; 604. Force transmission rod; 605. First sleeve; 606. First spring; 607. Second hinge joint; 7. Amplification assembly; 701. Pivot shaft; 702. First telescopic rod; 703. Gear plate; 704. Slide carriage; 705. First hinge joint; 706. Adjustment assembly; 8. Rotating shaft; 801. Guide rod; 802. Ring; 803. Slider; 804. Second spring; 805. Linkage rod; 806. Connecting ring; 807. Sliding ring; 808. Second telescopic rod; 809. 9; Follower plate 810; Third spring 811; Pressure plate 812; Pressure sensor 813; Second sleeve 814; First threaded hole 815; Slide groove 816; Flying disc 817; Protrusion 818; Fixing groove 819; Force transmission groove 820; Second threaded hole 821; Third threaded hole 822; Retaining ring 823; Clearance groove 824; Transmission control component 9; Connecting component 10; Semi-ring clamp 1001; Alignment groove 1002; Extension plate 1003; Through hole 1004; Step 1005; Insert rod 1006; Locking hole 1007; Contact surface 1008; Screw 11; Bearing 12. Detailed Implementation

[0036] like Figure 1-9In this invention, an adaptive foundation pit water level monitoring and control device includes a vacuum pump 4 and a water level height component 6. The water level height component 6 is located inside a pipe frame 1. A support frame 5 is provided on the upper side of the pipe frame 1. An amplification component 7 is provided inside the support frame 5. The water level height component 6 includes a float 601 and a force transmission rod 604. The amplification component 7 includes a pivot shaft 701, a toothed plate 703, and a gear 705. The float 601 is used to detect the water level status. The force transmission rod 604 and the pivot shaft 701 are hinged. The pivot shaft 701 is rotatably installed inside the support frame 5. The gear 705 is fixed on an adjustment component 8. The toothed plate 703 and the gear 705 are meshed together. The adjustment component 8 includes a pressure plate 812 and a pressure sensor 813. The gear 705 is used to control the pressure plate 812 to press against the pressure sensor 813. The pressure sensor 813 is connected to the vacuum pump 4 through a transmission control component 9. This structure allows water to enter the bottom of the pipe rack 1, and the float 601 can sense changes in the water level in the pit. When the water level rises, the float rises simultaneously with the water surface, thereby lifting the force transmission rod 604 to actuate, forming a lever that converts the rising speed into the rotational speed of the adjustment component 8, thus controlling the position of the pressure plate 812. The pressure sensor 813 obtains the pressure magnitude of the pressure plate 812, and then adjusts the working parameters of the vacuum pump 4 through the transmission control component 9. The entire process requires no human intervention, adaptively adjusting the height of the water level in the pit, and promptly pumping water out of the pit, making it safe and efficient overall. During use, if the water level in the pit rises faster, the rotational speed of the shaft will be faster, the pressure of the pressure plate on the pressure sensor will be greater, and the pumping speed of the vacuum pump will be faster. Conversely, if the water level rises slower, the opposite will occur. The invention calculates the water level rise rate per unit time, rather than the water level at any given moment, solving the problem that if pumping is only performed after reaching a set height, and the water level rises too quickly, pumping will not be able to lower the water level.

[0037] In the preferred embodiment, a top plate 603 is provided on the lower side of the force transmission rod 604. The top plate 603 is connected to the float 601 via a tie rod 602. A first spring 606 is sleeved on the force transmission rod 604. A strip groove 2 is provided on the lower side of the pipe rack 1. The pipe rack 1 is connected to the vacuum pump 4 via a bracket 3. A contact switch is provided on the side of the top plate 603 facing the force transmission rod 604. This structure allows water to enter the strip groove 2, thereby improving the ability to sense the water level. Two pipes on the vacuum pump 4 lead to the inside and outside of the pit. The support frame 5 is erected on the ground outside the pit, and the pipe rack 1 is placed inside the pit.

[0038] In a preferred embodiment, the top of the force transmission rod 604 is provided with a first sleeve 605, and the upper part of the first sleeve 605 is provided with a second hinge joint 607. First telescopic rods 702 are respectively provided on both sides of the pivot shaft 701. The end of the first telescopic rod 702 near the pipe rack 1 is provided with a first hinge joint 706, and the first hinge joint 706 and the second hinge joint 607 are hinged together. This structure allows the contact switch located on the top plate 603 to be triggered when it contacts the first sleeve 605, thus issuing an alarm to warn personnel. Since the distance from the pivot shaft to the toothed plate is longer than the distance from the pivot shaft to the straight rod, the lever formed by the pivot shaft and the first telescopic rod can amplify the effect of rising water levels, setting a warning height.

[0039] In the preferred embodiment, a first telescopic rod 702 is provided on one side of the pivot shaft 701, and a slide 704 is provided at the end of the first telescopic rod 702. A toothed plate 703 is fixed on the toothed plate 703. This structure ensures a stable overall connection, prevents the first telescopic rod 702 from jamming, and guarantees high control accuracy of the force transmission rod 604. The distance from the pivot shaft 701 to the toothed plate 703 is longer than the distance from the pivot shaft 701 to the straight rod 604. This difference in length ratio increases the moving distance of the toothed plate 703. The pivot shaft 701 and the first telescopic rod 702 form a lever. The slide 704 consists of two vertical plates, and the first telescopic rod 702 passes between the two vertical plates. The slide 704 is fixedly installed on the inner wall of the support frame 5.

[0040] In this embodiment, the float 601 is made of a hollow metal sphere. The float 601 floats up due to the water level inside the pipe rack 1. The surface of the top plate 603 is slidably connected to the pipe rack 1, and the top of the sleeve 605 is fixedly connected to the pipe rack 1. When the water level in the pit is low, the height of the float 601 is fixed. The float 601 pulls down the top plate 603 by its own weight through the tension 602, and at the same time stretches the first spring 606. When the water level in the pit rises, water enters the bottom of the pipe rack 1 and the strip groove 2, and the float 601 rises with the water surface. At this time, the first spring 606 will retract to keep the pull rod 602 in a taut state. The pipe rack 1 limits the movement of the pull rod 602. The helical spring 606 pulls the top plate 603 upward. When the contact switch on the top plate 603 contacts the sleeve 605... When the top plate 603 moves upward, it will drive the force transmission rod 604 to move upward. The straight rod 604 drives the toothed plate 703 to move downward using the first telescopic rod 702. The slide 704 controls the sliding path of the toothed plate 703. The first telescopic rod 702 avoids jamming during sliding. Since the distance from the pivot shaft 701 to the toothed plate 703 is longer than the distance from the pivot shaft 701 to the force transmission rod 604, the lever formed by the pivot shaft 701 and the first telescopic rod 702 allows the toothed plate 703 to move a longer distance than the force transmission rod 604, thereby amplifying the effect of the rising water level. The toothed plate 703 then drives the slide 704 to trigger the adjustment component 8, setting a height for warning. At the same time, the amplification component 7 converts the rising water level speed into rotational speed.

[0041] like Figure 10-18 In the preferred embodiment, the adjusting assembly 8 includes a rotating shaft 801. The two sides of the rotating shaft 801 are connected to a support frame 5 via bearings 12. A gear 705 is fitted onto the rotating shaft 801. A circular ring 803 and a connecting ring 807 are located in the middle of the rotating shaft 801. The circular ring 803 is connected to the rotating shaft 801 via a guide rod 802. A slider 804 slides on the guide rod 802. The slider 804 is connected to the connecting ring 807 via a linkage rod 806. The connecting ring 807 is rotatably mounted on a sliding ring 808. The sliding ring 808 is fixed to the inner side of the support frame 5 via a second telescopic rod 809. A pressure plate 812 is located below the sliding ring 808. The bearings 12 are mounted on the support frame 5, ensuring smooth and stable rotation of the rotating shaft 801. This structure allows the rotating shaft 801 to rotate under the drive of the gear 705. The rotation generates centrifugal force, which causes the slider 804 to shift, thereby adjusting the position of the connecting ring 807. Since the second telescopic rod 809 is fixed inside the support frame 5, the sliding ring 808 can rotate. At this time, the sliding ring 808 can only move along the axial direction of the rotating shaft 801, thereby pushing and changing the position of the pressure plate 812, which in turn changes the force of the pressure plate 812 pressing on the pressure sensor 813. At this time, the transmission control component 9 adjusts the working state of the vacuum pump 4 according to the signal obtained by the pressure sensor 813.

[0042] In a preferred embodiment, a second spring 805 is provided between the slider 804 and the rotating shaft 801. The second spring 805 is sleeved on the guide rod 802. The two sides of the linkage rod 806 are respectively hinged to the slider 804 and the connecting ring 807. A follower plate 810 is inserted into the bottom of the sliding ring 808. The follower plate 810 is connected to the pressure plate 812 through a third spring 811. With this structure, the sliding ring 808 drives the follower plate 810 to move. The follower plate 810 uses the third spring 811 to make the pressure plate 812 and the pressure sensor 813 contact and squeeze. The faster the water level rises, the greater the pressure of the pressure plate 812 on the pressure sensor 813, and the faster the vacuum pump 4 pumps water. Conversely, the slower the water level rises, the faster the water level rises. The calculation measures the water level rise rate per unit time, rather than the water level at the current moment. This solves the problem that if pumping is only performed after reaching a set height, and the water level rises too quickly, pumping will not be able to lower the water level.

[0043] In the preferred embodiment, guide rod 802 has grooves 816 on both sides, and a flying disc 817 is fitted onto guide rod 802. The flying disc 817 has symmetrical protrusions 818, which are slidably connected to the grooves 816. The flying disc 817 also has a fixing groove 819 for fixing the second spring 805. This structure allows the flying disc 817 to rotate during the rotation of the shaft. Due to its own weight, the flying disc 817 tends to move away from the shaft 801 under centrifugal force, thus squeezing the second spring 805 and pushing the slider 804. The slider 804 then exerts a more significant pulling effect on the connecting ring 807. The flying disc 817 solves the problem that when the rotation speed is within a certain range, the slider 804 may not move actively, resulting in a weak pulling effect on the connecting ring 807. Therefore, it can improve the response speed of the slider 804 under the rotation of the shaft 801, ensuring high overall detection accuracy and more precise control.

[0044] In a preferred embodiment, a second sleeve 814 is provided in the middle of the guide rod 802, and a first threaded hole 815 is provided through the second sleeve 814. A second threaded hole 821 is provided on the upper part of the rotating shaft 801, and a screw 11 passes through the first threaded hole 815 and the second threaded hole 821. This structure makes the installation and removal of the ring 803 convenient and efficient, while also reducing manufacturing requirements. The size and weight of the ring 803 can be adjusted as needed, ensuring higher detection accuracy.

[0045] In a preferred embodiment, the connecting ring 807 is connected to the sliding ring 808 via the connecting assembly 10. The connecting ring 807 is provided with a force transmission groove 820. The connecting assembly 10 includes two opposing semi-ring clamps 1001. The inner side of the semi-ring clamps 1001 is provided with an alignment groove 1002. The semi-ring clamps 1001 and the connecting ring 807 are engaged. An extension plate 1003 is provided on one side of the alignment groove 1002. The extension plate 1003 is provided with a through hole 1004. The sliding ring 808 is provided with a third threaded hole 822. The screw 11 passes through the through hole 1004 and the third threaded hole 822. This structure ensures that the connecting ring 807 and the sliding ring 808 are not fixedly connected, and the sliding ring 808 is not driven to rotate by the connecting ring 807, thus ensuring its own positional stability. The semi-ring clamp 1001 is made of polytetrafluoroethylene, which is self-lubricating, reducing frictional damage to the surface when the connecting ring 807 rotates, reducing heat, and avoiding structural deformation. The semi-ring clamp 1001 only transmits the axial movement of the connecting ring 807, and its cooperation with the second telescopic rod 809 isolates the rotational transmission of the connecting ring 807, ensuring stable control of the follower plate 810.

[0046] In the preferred embodiment, the bottom of the semi-ring clamp 1001 is provided with a contact surface 1008, and the contact surface 1008 is provided with a plug rod 1006 and a locking hole 1007 respectively. A step 1005 is provided between the extension plate 1003 and the semi-ring clamp 1001. A retaining ring 823 is provided on the upper part of the sliding ring 808. A relief groove 824 is provided on one side of the retaining ring 823. The third threaded hole 822 is evenly distributed on the retaining ring 823 along the circumference. This structure allows the two semi-ring clamps 1001 to fit together through the contact surface 1008, while the insertion rod 1006 and the locking hole 1007 are interlocked and locked together, ensuring a stable overall connection. This guarantees that when the connecting ring 807 is engaged, the two end faces along the axis of the rotating shaft 801 are coplanar, avoiding vibration and unstable force transmission. It also makes the whole unit easy to install and disassemble. The clearance groove 824 also reduces weight, lowering the cantilever stress on the second telescopic rod 809, resulting in better overall working condition. The follower plate 810 also supports the sliding ring 808 from below, ensuring balanced overall force and good long-term working performance.

[0047] The above embodiments are merely preferred technical solutions of the present invention and should not be considered as limitations on the present invention. The scope of protection of the present invention should be limited to the technical solutions described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the scope of protection of the present invention.

Claims

1. An adaptive foundation pit water level monitoring and control device, characterized in that: The utility model provides a kind of water level control system, including vacuum pump (4) and water level height component (6), water level height component (6) is located in pipe frame (1), the upper side of pipe frame (1) is equipped with support frame (5), support frame (5) is equipped with amplification component (7) inside, water level height component (6) includes float ball (601) and force transmission rod (604), amplification component (7) includes pivot shaft (701), toothed plate (703) and gear (705), float ball (601) is used to detect water level state, force transmission rod (604) and pivot shaft (701) are hinged, pivot shaft (701) rotatably be provided in support frame (5), gear (705) is fixed on adjusting component (8), toothed plate (703) and gear (705) are engaged connection, adjusting component (8) includes pressing plate (812) and pressure sensor (813), gear (705) is used to control pressing plate (812) and press on pressure sensor (813), pressure sensor (813) is connected by transmission control component (9) and vacuum pump (4); The faster the water level rises, the greater the pressure of the pressing plate (812) on the pressure sensor (813), and the faster the vacuum pump (4) pumps water. Adjusting component (8) includes shaft (801), shaft (801) both sides are connected by bearing (12) and support frame (5) respectively, gear (705) is sleeved on shaft (801), shaft (801) is equipped with ring (803) and cooperation ring (807) in the middle, ring (803) is connected by guide rod (802) and shaft (801), guide rod (802) is equipped with sliding block (804) on the upper side, sliding block (804) is connected by linkage rod (806) and cooperation ring (807), cooperation ring (807) rotatably be provided on sliding ring (808), sliding ring (808) is fixed on the inner side of support frame (5) by second telescopic rod (809), pressing plate (812) is arranged on the lower side of sliding ring (808); Guide rod (802) both sides are equipped with sliding groove (816) respectively, guide rod (802) is sleeved with flying disc (817), flying disc (817) is symmetrically equipped with convex (818) on the upper side, convex (818) and sliding groove (816) are slidably connected, flying disc (817) is also equipped with fixed groove (819) of fixed second spring (805).

2. The self-adapting foundation pit water level measuring and control device according to claim 1, characterized in that: The lower side of force transmission rod (604) is provided with a top plate (603), the top plate (603) is connected by a pull rod (602) and a float ball (601), a first spring (606) is sleeved on the force transmission rod (604), a strip-shaped groove (2) is arranged on the lower side of the pipe frame (1), the pipe frame (1) is connected by a support (3) and a vacuum pump (4), and a contact switch is arranged on the side of the top plate (603) facing the force transmission rod (604).

3. The self-adapting foundation pit water level measuring and control device according to claim 2, characterized in that: The top of the force transmission rod (604) is provided with a first sleeve (605), the upper part of the first sleeve (605) is provided with a second hinge joint (607), the both sides of the pivot shaft (701) are respectively provided with a first telescopic rod (702), the end of the first telescopic rod (702) close to the pipe frame (1) is provided with a first hinge joint (706), and the first hinge joint (706) is hinged with the second hinge joint (607).

4. The self-adapting foundation pit water level measuring and control device according to claim 1, characterized in that: The hinge shaft (701) is provided with a first telescopic rod (702) on one side, and the end of the first telescopic rod (702) is provided with a sliding frame (704), and a toothed plate (703) is fixedly arranged on the toothed plate (703).

5. The self-adapting foundation pit water level measuring and control device according to claim 1, characterized in that: The second spring (805) is sleeved on the guide rod (802), the linkage rod (806) is hingedly connected with the sliding block (804) and the cooperation ring (807) on two sides, the sliding ring (808) is provided with a follower plate (810) at the bottom, and the follower plate (810) is connected through the third spring (811) and the pressing plate (812).

6. The self-adapting foundation pit water level measuring and control device according to claim 1, characterized in that: The middle part of the guide rod (802) is provided with a second sleeve (814), the first threaded hole (815) is arranged through the second sleeve (814), the upper part of the rotating shaft (801) is provided with a second threaded hole (821), and the screw (11) is arranged in the first threaded hole (815) and the second threaded hole (821).

7. The self-adapting foundation pit water level measuring and control device according to claim 1, characterized in that: The cooperation ring (807) is connected with the sliding ring (808) through the connecting assembly (10), the cooperation ring (807) is provided with a force transmission groove (820), the connecting assembly (10) comprises two half ring clamping plates (1001) oppositely arranged, the inner side of the half ring clamping plate (1001) is provided with a positioning groove (1002), the half ring clamping plate (1001) and the cooperation ring (807) are clamped, the outer extension plate (1003) is arranged on one side of the positioning groove (1002), the through hole (1004) is arranged on the outer extension plate (1003), the third threaded hole (822) is arranged on the sliding ring (808), and the screw (11) is arranged in the through hole (1004) and the third threaded hole (822).

8. The self-adapting foundation pit water level measuring and control device according to claim 7, characterized in that: The bottom of the half ring clamping plate (1001) is provided with a contact surface (1008), the contact surface (1008) is provided with an insertion rod (1006) and a locking hole (1007), respectively, the outer extension plate (1003) and the half ring clamping plate (1001) are provided with a step (1005), the upper part of the sliding ring (808) is provided with a blocking ring (823), the side of the blocking ring (823) is provided with a avoiding groove (824), and the third threaded hole (822) is uniformly distributed on the blocking ring (823) in the circumferential direction.

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