A device for treating defects of foundation piles of engineering structures

Abstract

A device for treating defects in pile foundations of engineering structures includes a voltage-stabilized power supply, a power switch, a cylinder, an electric push rod, an electric pulverizer, a water pump, an air compressor, and a solenoid valve. It also has an electric support mechanism, a control mechanism, and a detection mechanism; the electric telescopic rods of multiple sets of electric support mechanisms are respectively installed on the inner two side ends of the cylinder, and the movable rod is installed on the front outer end of the piston rod of the electric telescopic rod; there is a support plate in the inner middle part of the cylinder, the first set of electric push rods is installed at the lower end of the support plate, and the electric pulverizer is installed at the lower end of the piston rod of the first set of electric push rods; the solenoid valve, the water pump, and the air compressor are connected; the detection mechanism is installed inside the cylinder, and the power switch, the voltage-stabilized power supply, and the control mechanism are installed in the component box. The present invention can conveniently clean the clay, sediment, etc. located at the lower end of the pile foundation by high-speed water flow impact, and can automatically cut and crush the clay and sediment, etc. at the lower end of the pile foundation, which is conducive to the clay or sediment under the pile foundation being completely cleaned.

Description

Technical Field

[0001] The invention relates to the technical field of construction equipment, in particular to a device for processing defects of foundation piles of engineering structures. Background Art

[0002] At present, in the construction of known engineering buildings (such as bridge foundation piles and house foundation piles), if the clay or sediment at the bottom of the foundation pile (the sediment at the bottom of the pile is found by sampling equipment during acceptance) and the clay and sediment mixture are not cleaned up during the construction operation, the bottom of the foundation pile after construction will bring instability factors to the foundation pile due to sediment and other reasons. The foundation pile will have the probability of tilting or sinking due to insufficient and uneven force due to the sediment at the bottom, which brings great hidden dangers to the safe use of the engineering buildings built on the foundation pile. In the existing technology, the clay or sediment at the bottom of the foundation pile cannot be handled, which will have an adverse effect on the safety and stability of the foundation pile. Summary of the invention

[0003] In order to overcome the disadvantages of the existing engineering construction that when the clay or sediment, as well as the mixture of clay and sediment at the bottom of the pile is not cleaned up during the construction operation, the bottom of the pile after construction will bring instability to the pile due to sediment and other reasons, and the pile will tilt or sink due to insufficient and uneven force on the sediment at the bottom, which will bring great hidden dangers to the safe use of the engineering buildings built on the pile. The present invention provides a device for processing defects of engineering structure piles, which can conveniently clean the clay, sediment, etc. at the bottom of the pile with high-speed water flow impact under the joint action of relevant mechanisms, and can automatically cut and crush the clay and sediment, etc. at the bottom of the pile, which is beneficial to the cleaning of all the clay or sediment under the pile, and the whole process is intelligent, which brings convenience to the staff.

[0004] The technical solution adopted by the present invention to solve its technical problem is:

[0005] A device for processing defects in pile foundations of engineering structures, comprising a voltage-stabilizing power supply, a power switch, a cylinder, an electric push rod, an electric pulverizer, a water pump, an air compressor, and a solenoid valve, characterized in that it also comprises an electric support mechanism, a control mechanism, and a detection mechanism; the upper and lower ends of the cylinder are open structures, and an upper cover is installed at the upper end of the cylinder; the electric support mechanism has multiple sets of the same, each set of the electric support mechanism comprises an electric telescopic rod and a movable rod, the electric telescopic rods of the multiple sets of electric support mechanisms are respectively installed at the inner two side ends of the cylinder, and the movable rod of each set of the electric support mechanism is installed at the front outer end of the piston rod of the electric telescopic rod of each set of the electric support mechanism; a support plate is installed at the inner middle part of the cylinder, and the support plate has a water-permeable port at a distance therebetween, there are two sets of electric push rods, the upper end of the first set of electric push rods is installed at the lower end of the support plate, and the upper end of the electric pulverizer is installed at the lower end of the piston rod of the first set of electric push rods ; A connecting pipe is installed at one end of the upper cover of the cylinder, and there are two solenoid valves. The liquid outlet end of the water pump is connected to one end of the first solenoid valve, the other end of the first solenoid valve is connected to the first end of a three-way pipe, the second end of the three-way pipe is connected to one end of the second solenoid valve, the other end of the second solenoid valve is connected to the exhaust pipe of the air compressor, and the third end of the three-way pipe is connected to the connecting pipe; the detection mechanism includes two fixed pipes, a hose, and a switch device. The shell of the second set of electric push rods is installed inside the cylinder, the first fixed pipe is installed at the other end of the upper cover and its upper part is located outside the upper cover, the upper end of the second fixed pipe is connected to the piston rod of the second set of electric push rods, the hose is sleeved between the lower end of the first fixed pipe and the upper end of the second fixed pipe and the hose has a certain length margin, and the switch device is installed outside the lower end of the second fixed pipe; the power switch, voltage-stabilized power supply, and control mechanism are installed in the component box.

[0006] Furthermore, the voltage-stabilized power supply is an AC-to-DC switching power supply module.

[0007] Furthermore, the first set and the second set of electric push rods are electric telescopic rods.

[0008] Furthermore, the solenoid valve is a normally closed valve core solenoid valve.

[0009] Furthermore, the control mechanism includes a time-controlled switch and a power switch. The time-controlled switch is a microcomputer time-controlled switch. One end of the power switch is connected to the positive power input end of the time-controlled switch.

[0010] Furthermore, the switch device of the detection mechanism includes an outer shell, a micro switch and a movable plate, the upper end of the movable plate is installed at the lower end of the button of the micro switch, the shell of the micro switch is installed at the lower end of the outer shell, and the outer shell is installed outside the lower end of the second fixed tube.

[0011] The beneficial effect of the present invention is that before the present invention is used, the inspectors inspect the defects of the pile foundations of the constructed engineering structures (such as various bridge pile foundations). During the inspection, when the clay and sediment thickness at the bottom of the pile is found to be too thick through the drilling sampling equipment, which affects the safety of the engineering buildings on the pile foundation, the geological drilling rig is first used to drill holes (with a cylindrical pit of a certain depth) around the pile body of the pile foundation, and then the present invention is placed in the drilled hole. The inspectors can firmly fix the cylinder in the hole by controlling the working mode of the six sets of electric telescopic rods and making the movable rods close to the inner side end of the hole, thereby ensuring the subsequent operation. When cleaning the sediment and clay in the pit, the control mechanism will control the electric crusher to gradually descend in height to crush the sediment and clay at the lower end of the drilled pit, and at the same time, the high-pressure water flow output by the water pump will impact the sediment and clay in the hole, so that the water flow will drive water, clay, sediment, etc., and flow out of the cylinder with the first fixed pipe. In the present invention, the staff can control the working mode of the second set of electric push rods to make the lower end of the second fixed pipe close to the lower end of the drilled hole, ensuring that all the water in the pit can be discharged to the outside of the cylinder; when the water in the hole is about to be discharged, the staff can control the compressed air output by the air compressor to blow out the remaining water in the hole, so that the subsequent pouring of concrete can achieve a good effect. Finally, the staff fills the drill hole with cement slurry and flattens the cement slurry at the hole. After the cement slurry solidifies at the bottom of the pile and in the drill hole, it can better stabilize the foundation pile, making the construction on the foundation pile safer. Based on the above, the present invention has good application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0013] Figure 1 It is a schematic diagram of the overall and local enlarged structure of the present invention.

[0014] Figure 2 It is a circuit diagram of the present invention. DETAILED DESCRIPTION

[0015] Figure 1As shown in, a device for treating defects in pile foundations of engineering structures comprises a voltage-stabilized power supply 1, a power switch 2, a cylinder 3, waterproof electric push rods 41 and 42, a waterproof electric pulverizer 5, a waterproof water pump 11, an air compressor (not shown in the figure), solenoid valves 71 and 72, and an electric support mechanism, a control mechanism 9, and a detection mechanism; the upper and lower ends of the cylinder 3 are open structures, and the upper end of the cylinder 3 has an upper cover 31 installed by a screw and nut, and a semicircular lifting ring 32 is welded to the middle of the upper end of the upper cover 31; the electric support mechanism has six identical sets, each set of the electric support mechanism includes a waterproof electric telescopic rod 61 and a movable rod 62, wherein the outer shells of the electric telescopic rods 61 of the three sets of electric support mechanisms are horizontally installed on the left side of the cylinder 3 at a certain distance from top to bottom. The outer shells of the electric telescopic rods 61 of the other three sets of electric support mechanisms are horizontally installed at the right inner end of the cylinder body at a certain distance from top to bottom, and the piston rods of the six sets of electric telescopic rods 61 are respectively led out through the six openings on both sides of the cylinder body 3 to the left and right parts of the outer end of the cylinder body 3 (the front end of the outer shell of the electric telescopic rod 61 and the opening are sealed to prevent the water in the cylinder body 3 from overflowing from the opening), and the movable rod 62 of each set of electric support mechanisms is vertically installed at the front outer end of the piston rod of the electric telescopic rod 61 of each set of electric support mechanisms; a circular support plate 33 is welded to the inner middle part of the cylinder body 3, and the support plate 33 has a plurality of openings at a certain distance as water permeable ports 331 (facilitating water to enter the bottom of the cylinder body), and there are two sets of electric push rods, the first set of electric push rods 41 The upper end of the shell is vertically installed on the middle part of the lower end of the support plate 33 through a screw nut, and the upper end of the shell of the electric pulverizer 5 is vertically installed on the lower end of the piston rod of the first set of electric push rods 41 through a screw nut; a connecting pipe 34 is welded to the right end of the upper cover of the cylinder 3, there are two waterproof solenoid valves, the liquid inlet end of the water pump 11 is connected to the tap water pipe or water tank through a hose, the liquid outlet end of the water pump 11 is connected to one end of the first solenoid valve 71 through a threaded connection, the other end of the first solenoid valve 71 is connected to the first end of a three-way pipe 73 through a threaded connection, the second end of the three-way pipe 73 is connected to one end of the second solenoid valve 72 through a threaded connection, the other end of the second solenoid valve 72 is connected to the exhaust pipe of the air compressor through a hose, and the third end of the three-way pipe 73 is connected to the connecting pipe 34 through a hose; the detection mechanism includes two fixed The outer shell of the second electric push rod 42 is vertically installed at the left end of the middle part of the cylinder 3 through a screw nut and is located on the support plate 33. The first fixed tube 81 is welded to the left end of the upper cover 31 and its upper part is located outside the upper cover 31. The outer side of the upper end of the second fixed tube 81 is connected to the lower end of the piston rod of the second set of electric push rods 42 through a screw nut. The rubber hose 82 is sleeved between the lower end of the first fixed tube 81 and the upper end of the second fixed tube 81 and the rubber hose 82 has a certain length margin. The switch device 83 is installed on the left part outside the lower end of the second fixed tube 81; there are seven power switches 2, and the power switch 2, the voltage-stabilized power supply 1, and the control mechanism 9 are installed in the component box 10, and the component box 10 is installed in the electrical control box;The wires connected to the electric pulverizer, electric push rod, electric telescopic rod and switch equipment are led out through the right sealed opening at the upper end of the cylinder. The switch equipment of the detection mechanism includes an outer shell 831, a micro switch 832 and a circular movable plate 833. The upper end of the middle part of the movable plate 833 is bonded to the lower end of the button of the micro switch 832. The shell of the micro switch 832 is installed at the lower end of the outer shell 831. The outer shell 831 is installed on the left part outside the lower end of the second fixed tube 81.

[0016] Figure 2 As shown, the voltage stabilizer A1 is a finished product of a 220V / 24V / 2KW AC 220V to DC 24V switching power supply module. The first set of electric push rods M2 and the second set of electric push rods M1 are finished products of electric telescopic rods with a working voltage of DC 24V and a model of DYTZ-C. The motor power of the first set of electric push rods M2 is 200W, and the motor power of the second set of electric push rods M1 is 100W. After the piston rods of the electric telescopic rods M1 and M2 move downward or upward to the stop point, the motor of the electric telescopic rod will stop working under the action of the internal limit switch of the electric telescopic rod. Only when the reverse power is input, the electric telescopic rod will work again. The working voltage of the electric pulverizer M3 is AC 220V and the power is 3KW; the working voltage of the water pump M5 is AC 220V and the power is 2KW; the solenoid valves DC1 and DC2 are normally closed valve core solenoid valves with a working voltage of DC 24V and a power of 3W. The electric telescopic rod MN of the six sets of electric support mechanisms is a finished electric telescopic rod with a working voltage of DC 24V and a model of DYTZ-C. The motor power of the electric telescopic rod is 100W. The control mechanism includes a time switch A2 and a toggle power switch K2. The toggle power switch K2 and seven power switches are installed on a circuit board in a component box. The handles of the toggle power switch K2 and the seven power switches are located outside the eight openings at the front end of the component box 10. One end of the toggle power switch K2 is connected to the positive power input terminal 1 of the time switch A2. The time switch A2 is a microcomputer time switch finished product of model KG316T. The microcomputer time switch finished product has a liquid crystal display screen, and also has seven cancel / restore, time adjustment, minute adjustment, week adjustment, automatic / manual, timing, and clock buttons, as well as two power input terminals 1 and 2, and two power output terminals 3 and 4. After power is turned on, the numbers displayed on the liquid crystal screen can be set by the user by operating the seven buttons respectively to set the time for the two power output terminals 3 and 4 to output power. The microcomputer time switch finished product has a memory function. As long as no secondary setting adjustment is performed, a power outage of the external power supply will not cause the internally set time program to change.

[0017] Figure 1 , 2As shown, the two poles of the 220V AC power supply and the power input terminals 1 and 2 of the voltage-stabilized power supply A1, the AC power input terminals 1 and 2 of the first power switch S5 and the seventh power switch S4 are connected via wires. The power output terminals 3 and 4 of the voltage-stabilized power supply A1 and the power input terminals 1 and 2 of the second power switch S6, the third power switch S7, the fourth power switch S1, the fifth power switch S2, and the sixth power switch S3, as well as the power input terminal of the control mechanism, the other end of the power switch K2, and the negative power input terminal 2 of the time-controlled switch A2 are connected via wires. The power output terminals 3 and 4 of the first power switch S5 are connected to the power input terminals of the water pump M5 via wires, respectively. The power output terminals 3 and 4 of the second power switch S6 and the third power switch S7 are connected to the power input terminals of the first solenoid valve DC1 and the second solenoid valve DC2 via wires, respectively. The two power output terminals 3 and 4, 5 and 6 of the fourth power switch S1 are connected to the positive and negative and negative and negative-positive power input terminals of the six sets of electric telescopic rods MN via wires, respectively. The two power output terminals 3 and 4, 5 and 6 of the fifth power switch S2 are connected to the positive and negative and negative-positive power input terminals of the second set of electric push rods M1 via wires. The power input ends are connected via wires respectively, the micro power switch K1 of the switching device is connected in series between the 5th pin of one power output end of the fifth power switch S2 and the positive power input end of the second set of electric push rods M1 via wires; the 3rd and 4th pins of one power output end of the sixth power switch S3 and the positive and negative power input ends of the first set of electric push rods M2 are connected via wires respectively, the 3rd and 4th pins of the power output end time control switch A2 of the control mechanism and the negative and positive power input ends of the first set of electric push rods M2 are connected via wires respectively; the power output end of the seventh power switch S4 and the two ends of the power input of the electric grinder M3 are connected via wires respectively.

[0018] Figure 1 , 2As shown, after the 220V AC power enters the power input end of the voltage stabilizer A1, the voltage stabilizer A1 will output a stable 24V DC power supply at its 3 and 4 pins under the action of its internal circuit, and enter the power input ends 1 and 2 of the second power switch S6, the third power switch S7, the fourth power switch S1, the fifth power switch S2, and the sixth power switch S3 and the power input end of the control mechanism, so that the above-mentioned power switches and the control mechanism are in an energized working state. Before the use of the present invention, the inspector inspects the defects of the piles of the built engineering structure (such as various bridge piles). During the inspection, when the drilling sampling equipment finds that the thickness of the clay and sediment at the bottom of the pile is too thick, which affects the safety of the engineering building on the pile, the geological drill is first used to drill oblique holes (columnar pits with a certain depth) around the pile body of the pile, and then the cylinder 3 is placed in the drilled hole (the lower part of the cylinder 3 is located at the bottom of the hole). After the cylinder 3 is put into the hole, the staff turns the toggle handle of the power switch S1 to the right, so that the 1 and 2 pins and the 5 and 6 pins of the power switch S1 are connected respectively, so that the 24V power supply will enter the negative and positive power input terminals of the electric telescopic rods MN of the six sets of electric support mechanisms, so that the piston rods of the electric telescopic rods MN of the six sets of electric support mechanisms will move forward and outward, and drive the movable rod 62 to move forward. The movable rods 62 of the six sets of electric support mechanisms are in tight contact with both sides of the inner wall of the hole, which can firmly fix the cylinder 3 in the hole and ensure the subsequent operation (to prevent the cylinder 3 from being displaced when the subsequent electric crusher M3 and the like are working). After the cylinder is fixed, the staff turns off the power switch S1 and turns on the power switch S6, so that the solenoid valve DC1 is energized to work and its internal valve core is opened, and then the power switch S5 is turned on, so that the water pump M5 is energized to work and pump external water into the cylinder 3 to flush and clean the sediment and clay in the pit in the lower part of the cylinder. After the high-pressure water pumped into the cylinder 3 by the water pump M5 impacts the sediment and clay in the hole, it flows out of the cylinder through the two fixed pipes 81, and the water flow takes the sediment and clay out of the hole. While the water flow impacts the sediment and clay in the hole, the staff turns on the power switches K2 and S4, so the time switch A2 is in the power-on working state (at the same time, the electric crusher M3 is in the power-on working state to crush the sediment and clay in the hole); after the time switch A2 is powered on, it will output power for 2 seconds every 5 seconds under the action of its internal circuit and the output power time of the 3rd and 4th pins set by the technicians. Therefore, the 24V power output of the 3rd and 4th pins of the time switch A2 will enter the negative and positive power input terminals of the electric push rod M2. When the electric push rod M2 is powered on, its piston rod drives the electric crusher M3 to descend to a certain height every 5 seconds to gradually crush the sediment and clay in the hole from top to bottom. Due to the crushing effect of the electric crusher M3, it is more conducive for the sediment and clay in the hole to be impacted by the water flow and then discharged out of the cylinder 3.

[0019] Figure 1 , 2As shown, in actual situations, according to the on-site conditions, the staff will generally shut down the electric crusher M3 after working for 3 minutes (and turn off the power of the electric push rod M2. The piston rod of the electric push rod M2 drives the electric crusher M3 to descend by about 10 cm, which can fully meet the needs). The crushing operation within 3 minutes can effectively remove the sediment and clay at the lower end of the hole (the power switches S4 and K2 can also be turned off in advance). After a period of time, when the sediment and clay in the hole are cleaned up (the water discharged through the fixed pipe 81 is no longer turbid), the staff turns off the power switches S6, S5, S4, and K2 (the solenoid valve DC1 loses power and does not work, the water pump M5 loses power and does not work, the electric grinder M3 loses power and does not work, and the electric push rod M2 loses power and does not work), and then turns the handle of the power switch S2 to the right, so that the 1st and 2nd feet and the 5th and 6th feet of the power switch S2 are connected respectively, so that the 24V power supply will enter the negative and positive power input terminals of the electric push rod M1, and the electric push rod M1 will be powered and work, and its piston rod will drive the second fixed pipe 81 to move downward (the two fixed pipes 81 are connected by a hose 82 and have a length margin, so the second fixed pipe 81 can move downward), so that the lower end of the second fixed pipe 81 can contact the lower end of the hole, ensuring that the compressed air output by the subsequent air compressor can discharge the remaining water to the outside of the cylinder 3. In actual situations, when the second fixed tube 81 descends, the switch device 83 descends synchronously. When the movable plate 833 contacts the lower end of the hole, the second fixed tube 81 continues to descend, and the button of the micro switch K1 is disconnected due to the obstruction of the movement of the movable plate 833. Since the power switch K1 is connected in series between the 5th pin of the power switch S2 and the positive power input terminal of the electric push rod M1, the electric push rod M1 will lose power and stop working after the movable plate 833 contacts the ground, preventing the electric push rod M1 from working all the time to push the switch device and the second fixed tube 81 downward, causing damage to the switch device and the second fixed tube 81. The second fixed pipe 81 is lowered to the position. After about one minute, the staff turns on the power switch S7. Then, the solenoid valve DC2 is powered on and the internal valve core is opened. The compressed air output by the air compressor enters the cylinder 3 through the pipeline and flows out through the second fixed pipe 81, the hose 82, and the first fixed pipe 81. At the same time, the flowing air brings the remaining water in the lower end of the cylinder out of the cylinder 3, ensuring the need for subsequent concrete pouring. When the remaining water is discharged, the staff turns the toggle handle of the power switch S1 to the left, so that the 1 and 2 pins and the 3 and 4 pins of the power switch S1 are connected respectively. In this way, the 24V power supply will enter the positive and negative power input terminals of the electric telescopic rod MN of the six sets of electric support mechanisms. Then, the electric telescopic rod MN of the six sets of electric support mechanisms is powered on and its piston rod drives the movable rod 62 to move inward and open the distance between the two side walls in the hole (turn off the power switch S1 after opening the distance). In this way, the staff can lift the cylinder out of the hole through the lifting ring 32 with a lifting tool.After the cylinder 3 is taken out from the hole, the staff fills the hole with cement slurry and flattens the cement slurry at the hole. After the cement slurry solidifies at the bottom of the pile and in the hole, it stabilizes the pile better and makes the construction on the pile safer. For the convenience of next use, after the cylinder 3 is taken out from the hole, the staff turns the toggle handle of the power switch S3 to the left, so that the 24V power supply enters the positive and negative power input terminals of the electric push rod M2, and then the electric push rod M2 drives the electric crusher M3 to rise to the initial position, and then turns off the power switch S3; at the same time, the staff turns the handle of the power switch S2 to the left, so that the 24V power supply enters the positive and negative power input terminals of the electric push rod M1 through the 1, 2 feet and 3, 4 feet of the power switch S1, and the electric push rod M1 is powered on to drive the second fixed pipe 81 to move upward to the initial position, and then turns off the power switch S2.

[0020] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes that fall within the meaning and scope of the equivalent elements of the claims are included in the present invention.

[0021] In addition, it should be understood that although the present specification is described according to the implementation mode, the implementation mode does not only include an independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A device for treating defects in pile foundations of engineering structures, comprising a voltage-stabilizing power supply, a power switch, a cylinder, an electric push rod, an electric pulverizer, a water pump, an air compressor, and a solenoid valve, characterized in that It also has an electric support mechanism, a control mechanism, and a detection mechanism; the upper and lower ends of the cylinder are open structures, and an upper cover is installed on the upper end of the cylinder; the electric support mechanism has multiple sets of the same, each set of electric support mechanism includes an electric telescopic rod and a movable rod, and the electric telescopic rods of the multiple sets of electric support mechanisms are respectively installed on the inner two side ends of the cylinder, and the movable rod of each set of electric support mechanism is installed on the front outer end of the piston rod of the electric telescopic rod of each set of electric support mechanism; a support plate is installed on the inner middle part of the cylinder, and the support plate has a water permeable port at a distance therebetween, and there are two sets of electric push rods, the upper end of the first set of electric push rods is installed on the lower end of the support plate, and the upper end of the electric pulverizer is installed on the lower end of the piston rod of the first set of electric push rods; a connecting pipe is installed at one end of the cylinder cover, and there are two solenoid valves, the liquid outlet end of the water pump is connected to one end of the first solenoid valve, the other end of the first solenoid valve is connected to the first end of a three-way pipe, the second end of the three-way pipe is connected to one end of the second solenoid valve, the other end of the second solenoid valve is connected to the exhaust pipe of the air compressor, and the third end of the three-way pipe is connected to the connecting pipe; the detection The detection mechanism includes two fixed tubes, a hose and a switch device. The shell of the second set of electric push rods is installed inside the cylinder. The first fixed tube is installed at the other end of the upper cover and its upper part is located outside the upper cover. The upper end of the second fixed tube is connected to the piston rod of the second set of electric push rods. The hose is sleeved between the lower end of the first fixed tube and the upper end of the second fixed tube and the hose has a certain length margin. The switch device is installed outside the lower end of the second fixed tube; the power switch, the voltage-stabilized power supply and the control mechanism are installed in the component box; the voltage-stabilized power supply is an AC-to-DC switching power supply module; the first set of electric push rods and the second set of electric push rods are electric telescopic rods; the solenoid valve is a normally closed valve core solenoid valve; the control mechanism includes a time-controlled switch and a power switch. The time-controlled switch is a microcomputer time-controlled switch, and one end of the power switch is connected to the positive power input end of the time-controlled switch; the switch device of the detection mechanism includes an outer shell, a micro switch and a movable plate. The upper end of the movable plate is installed at the lower end of the button of the micro switch, the shell of the micro switch is installed at the lower end of the outer shell, and the outer shell is installed outside the lower end of the second fixed tube.

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