Hydroelectric generator set runner chamber concrete removal system and method of use

Abstract

The water turbine generator set runner chamber concrete removal system and method, it includes lower annular track, upper annular track, lifting tower and drive module, the upper annular track is installed on the upper side of the lower annular track, the lifting tower is longitudinally connected with the lower annular track and the upper annular track through the drive module at both ends, the lifting tower can do annular motion along the inner circumference of the lower annular track and the upper annular track under the drive of the drive module, the lifting tower is installed with lifting module, the lifting module is installed with mechanical arm, the mechanical arm is installed with high-pressure spray gun, the high-pressure water is effectively applied to the concrete surface of the specified position of the runner chamber through the high-pressure spray gun, the stable, accurate, automatic, remote and multi-angle concrete removal is realized.The water turbine generator set runner chamber concrete removal system can effectively reduce the manpower investment, reduce the risk of personnel edge and air operation, realize the high efficiency, high precision, small vibration, small abandoned slag particle and green environmental protection removal of runner chamber concrete.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of large-scale water turbine generator unit reconstruction construction high-end equipment, mainly relates to a water turbine generator unit runner chamber concrete removal system and a use method, and is suitable for the removal construction of a water turbine generator unit runner chamber concrete. BACKGROUND

[0002] During the reconstruction of a 170MW unit of a certain large-scale hydropower station, the original runner chamber second-stage concrete needs to be removed, the minimum size of the inner diameter of the runner chamber shell is 11.00 meters, the maximum outer diameter to be reached during the removal is 13.5 meters, and the maximum diameter of the top individual position reaches 14.6 meters. The removal area has a height range of 6.16 meters, and the bottom elevation is 32.8 meters. At present, the removal construction methods commonly used in the industry mainly include manual mechanical methods, such as the use of mechanical equipment such as air picks, rock drills, and hydraulic splitting machines. However, this method has low efficiency, high risk of open-air operations, and high dust and noise, which poses a risk to occupational health. In the face of large-size runner chamber concrete removal, this method requires a large amount of manpower and a long construction period, and it is difficult to meet the on-site construction needs of large-scale water turbine unit reconstruction.

[0003] In view of the problems of manual removal operations, a paper entitled “CH Power Plant No. 1 Water Turbine Generator Unit Runner Chamber Reconstruction Practice” was published in the journal “Guangdong Water Resources and Hydropower” in November 2014, Issue 11. In the paper, it is also disclosed that during the reconstruction of the runner chamber, the old runner chamber needs to be removed. Since this unit is only 36MW, the removal operation is divided into three steps: steel panel, rib plate cutting and removal, and concrete drilling and breaking. The entire construction process still mainly relies on manual cutting, drilling, and concrete breaking operations. There are still problems such as high construction difficulty and large amount of manual work, which cannot be applied to the reconstruction of 170MW units.

[0004] Similarly, in view of the problems of manual removal operations, the paper “High-pressure Water Jet Breaking Runner Chamber Special Mechanical Design and Construction Technology Research” was published by the China Railway Engineering Equipment Group Co., Ltd. in the journal “Construction Technology” in April 2021. The paper discloses that high-pressure water jet breaking is used to break the concrete of the runner chamber structure, and a high-pressure water jet breaking robot is designed for runner chamber concrete breaking construction operations. The high-pressure water jet breaking robot is divided into a bearing platform, a breaking robot, a lifting and hoisting device, and auxiliary equipment. The bearing platform is connected to the top flange surface of the fixed guide vane, and the overall weight of the bearing device is borne by the bearing platform. The middle support connecting column of the bearing platform is connected to the lifting platform below, and the high-pressure water jet breaking robot works on the lifting platform. The lifting and hoisting device is placed on the bearing platform to lift the lifting platform and hoist the soil, and other auxiliary equipment including a high-pressure water jet generating device and a ventilation device is also placed on the bearing platform.

[0005] The special machine has the following problems in specific use:

[0006] (1) Since the diameter of the large runner chamber is a variable-diameter structure, the lifting platform with the above-mentioned fixed structure cannot well adapt to the change in diameter;

[0007] (2) Since the height to be removed of the large runner chamber is high, directly setting the connecting column at the central part of the runner chamber, the bottom of which is a cantilever structure, will shake and cannot guarantee the stability during the operation;

[0008] (3) The high-pressure water jet breaking robot used is a relatively independent structure and is supported on the lifting platform, and during the specific operation, the accurate control of the breaking and removing position of the robot cannot be realized;

[0009] (4) The relatively independent control structure is used between different modules of the above-mentioned special machine, and during the operation, full-automatic breaking operation cannot be realized.

[0010] In addition, in view of the problem of manual removal operation, China Railway Science and Technology Group Co., Ltd. discloses a runner chamber cutting and removing construction process in CN112692537A, which mainly uses a water jet as the main body of cutting and adopts a block type cutting operation mode to cut and remove the runner chamber concrete. However, this removal process can only stay in theory and has not been implemented, and there are still many details to be overcome during the specific implementation, and it cannot be practically applied to the removal of the runner chamber concrete of the existing hydroelectric generator set. SUMMARY

[0011] The technical problem to be solved by the present application is to solve the problems in the above background art and provide a runner chamber concrete removal system for a hydroelectric generator set. This equipment is based on the structural characteristics of the large hydroelectric generator set runner chamber and uses automatic high-pressure water jet removal technology to realize full-range mechanized remote automatic removal of the runner chamber concrete.

[0012] Another technical problem to be solved by the present application is to provide a use method of the runner chamber concrete removal system for the hydroelectric generator set.

[0013] In order to realize the above technical features, the water turbine generator set runner chamber concrete removal system comprises a lower annular track, an upper annular track, a lifting tower, a driving module, a lifting module, a mechanical arm and a high-pressure spray gun, the upper annular track is installed above the lower annular track, the lifting tower is longitudinally and slidingly connected with the lower annular track and the upper annular track through the driving module at both ends, the lifting tower can make annular motion along the inner circumference of the lower annular track and the upper annular track under the driving of the driving module, the lifting module is installed on the lifting tower, the mechanical arm is installed on the lifting module, and the high-pressure spray gun is installed on the mechanical arm, the lower annular track can be radially supported on the inner wall of the lower tail water pipe on the lower side of the runner chamber, and the upper annular track can be axially supported at the upper fixed guide vane of the runner chamber.

[0014] The lower annular track comprises a lower track ring, a plurality of lower support rods are annularly and uniformly arranged on the outer circumference of the lower track ring, and the length of the lower support rod can be adjusted.

[0015] The upper annular track comprises an upper track ring, a plurality of upper support rods are annularly and uniformly arranged on the outer circumference of the upper track ring, and a support column is longitudinally connected to the end of the upper support rod away from the upper track ring.

[0016] The lifting tower is a rectangular steel column structure, the lifting module is slidingly sleeved on the lifting tower, a rack is longitudinally arranged on the lifting tower, and the gear of the driving device on the lifting module is engaged with the rack, so that the lifting module is driven to move up and down along the lifting tower.

[0017] The driving module comprises a connecting seat, one side of the connecting seat is fixedly installed with the lifting tower, the other side is installed with a pinch roller set, the driving module located on the lower annular track is rotationally and limitingly connected with the lower track ring through the pinch roller set, and the driving module located on the upper annular track is rotationally and limitingly connected with the upper track ring through the pinch roller set.

[0018] The inner ring of the lower track ring of the lower annular track and the inner ring of the upper track ring of the upper annular track are respectively installed with an inner gear ring, a hydraulic motor is installed at the bottom or the top of the lifting tower, a transmission shaft is rotationally installed in the lifting tower in the longitudinal direction, the output shaft of the hydraulic motor is connected and driven with the transmission shaft, a transmission gear is installed on the transmission shaft at the position corresponding to the inner gear ring of the lower track ring and the upper track ring, and the transmission gear is engaged with the inner gear ring.

[0019] The mechanical arm comprises a variable-diameter module, a rotating module and a transverse movement module, the variable-diameter module is a sliding table structure, the fixed side of the sliding table structure is fixedly installed with the lifting module, the movable side of the sliding table structure is connected with the rotating module, the upper side output end of the rotating module is installed with a transverse movement rail of the transverse movement module, a transverse movement rack is arranged on the transverse movement rail, a V-shaped wheel set is installed on the lower side of the support plate, the support plate is slidably installed on the transverse movement rail through the V-shaped wheel set, a transverse movement motor is further installed on the support plate, a gear is installed on the output shaft of the transverse movement motor, the gear is in meshing transmission with the transverse movement rack, and the high-pressure spray gun is installed on the support plate.

[0020] The high-pressure water pump station is further provided, the water outlet of the high-pressure water pump station is connected with the water inlet of the high-pressure spray gun through a high-pressure water hose, and a high-pressure overflow valve is connected in series in the high-pressure water hose.

[0021] The hydraulic station is further provided, and the hydraulic station is connected with the driving module and the hydraulic executing element on the mechanical arm through a hydraulic oil pipe.

[0022] The use method of the concrete removal system of the runner chamber of the hydroelectric generating set comprises the following steps:

[0023] Step 1: the lower annular track is welded and assembled at the lower side of the runner chamber and the draft tube cone section, the lower support rod is abutted against the inner wall of the draft tube cone section, the upper annular track is welded and assembled at the upper side of the runner chamber and the stay vane, the support column is welded and abutted against the stay vane, the bottom is welded with the lower lining plate of the seat ring, the lifting tower is assembled between the upper annular track and the lower annular track from bottom to top, the lifting module is hoisted, the lifting module is inserted into the lifting tower and adjusted to the lowermost end, the variable-diameter module, the rotating module and the transverse movement module of the mechanical arm are sequentially installed, the high-pressure spray gun is installed on the support plate of the transverse movement module, the hydraulic oil pipe of the hydraulic station is connected with the driving module and the hydraulic executing element on the mechanical arm, and the electric control cable is connected with the motor reducer in the lifting module; the lifting tower, the lifting module and the mechanical arm are remotely controlled through the electric control system or the remote controller to operate;

[0024] Step 2: the high-pressure water hose is connected with the water outlet of the high-pressure water pump station, the high-pressure water hose is connected with the water inlet of the high-pressure spray gun through the high-pressure overflow valve, the start and stop of the high-pressure water pump station and the opening and closing of the high-pressure overflow valve are controlled through the electric control system or the remote controller to control the high-pressure water output;

[0025] Step 3: before the concrete removal system of the runner chamber of the hydroelectric generating set starts to work, the power connection of the high-pressure water pump station and the hydraulic station control cabinet is checked, the motor phase sequence and the cable power are ensured to be correct, the high-pressure water hose connection and the surrounding protection are checked, the hydraulic oil pipe and the electric control cable are checked to be in good condition, the hydraulic station is started and tested, and the circumferential movement of the lifting tower, the up-down movement of the lifting module and the rotating or swinging movement of the high-pressure spray gun are checked;

[0026] Step 4: Turn on the high-pressure water pump station, hydraulic station in turn, adjust the driving module through the electric control system or remote controller, make the lifting tower rotate around the lower annular track and the upper annular track, make the lifting module move to the removal position along the lifting tower, then control the variable diameter module, the rotating module and the transverse module to adjust the high-pressure spray gun to the required height, target distance and angle for removing the concrete, the construction personnel remotely control the high-pressure overflow valve to be turned on through the electric control system or the remote controller, the high-pressure water is sprayed out from the high-pressure spray gun, the high-pressure spray gun reciprocates and continuously acts on the concrete surface to realize the removal of the concrete in the specified area, when the concrete in the area is removed, the high-pressure overflow valve is turned off, the water pressure in the high-pressure water hose is unloaded, the position of the high-pressure spray gun is adjusted to the next removal area, and the operation of step 4 is repeated until the removal is completed, wherein the variable diameter module is used to control the distance between the head of the high-pressure spray gun and the inner wall of the concrete, the rotating module is used to control the angle between the high-pressure spray gun and the inner wall of the concrete, and the transverse module is used to control the left and right reciprocating movement of the high-pressure spray gun.

[0027] Step 5: After the removal of the runner chamber concrete is completed, the water source and the power source are cut off, the remaining water in the high-pressure water pump station is emptied, the lifting module is lowered to the lowest part of the lifting tower, the hydraulic oil pipe, the electric control cable and the high-pressure water hose are disassembled, the high-pressure spray gun, the transverse module, the rotating module, the variable diameter module and the lifting module are disassembled in turn, the lifting tower is disassembled from top to bottom, the driving module installed on the lower annular track is disassembled, the upper annular track is disassembled, the upper support rod and the support column are disassembled, the lower annular track is disassembled, and the lower support rod is disassembled.

[0028] The present application has the following beneficial effects:

[0029] 1) The lower annular track is supported radially with the inner wall of the draft tube cone pipe on the lower side of the runner chamber, and the upper annular track is supported at the fixed guide vane on the upper side of the runner chamber, so that the system has a stable structure, the lifting tower can move in a ring shape along the inner circumference of the lower annular track and the upper annular track under the drive of the driving module, the lifting module can move up and down on the lifting tower, the mechanical arm provides a suitable target distance and angle for the high-pressure spray gun, and the removal of the runner chamber concrete is stable, accurate, automatic, remote and multi-angle.

[0030] 2) The lower annular track and the upper annular track do not need to be attached to the construction platform to realize full coverage of the removal range of the runner chamber, compared with the annular track attached to the construction platform, the present application has a larger operation space, lower load and vibration requirements for the construction platform, is convenient for on-site operation, and saves the manufacturing and economic cost of the construction platform.

[0031] 3) through high pressure spray gun high pressure water effective action to the runner room designated location concrete surface, efficient, high quality completion of the concrete removal. The runner room concrete removal system of the hydroelectric generating set can effectively reduce the labor input, reduce the risk of personnel edge open operation, realize the runner room concrete high efficiency, high precision, small vibration, small abandoned slag particles, green environmental protection demolition. BRIEF DESCRIPTION OF DRAWINGS

[0032] The application will be further described below in conjunction with the drawings and examples.

[0033] Figure 1 The system structure diagram of the application is shown in the figure.

[0034] Figure 2 The system structure diagram of the application is shown in the figure.

[0035] Figure 3 The system structure diagram of the application is shown in the figure. Figure 2 The system structure diagram of the application is shown in the figure.

[0036] Figure 4 The system structure diagram of the application is shown in the figure.

[0037] Figure 5 The system structure diagram of the application is shown in the figure.

[0038] Figure 6 The system structure diagram of the application is shown in the figure. Figure 4 The system structure diagram of the application is shown in the figure.

[0039] Figure 7 The system structure diagram of the application is shown in the figure.

[0040] In the figure: lower annular track 100, lower track ring 110, lower support rod 120, inner ring gear 130.

[0041] Upper annular track 200, upper track ring 210, upper support rod 220, support column 230.

[0042] Lifting tower 300, rack 310, hydraulic motor 320, transmission shaft 330.

[0043] Drive module 400, connecting seat 410, pinch roller group 420, transmission gear 430.

[0044] Lifting module 500.

[0045] Mechanical arm 600, variable diameter module 610, rotation module 620, horizontal moving track 630, horizontal moving rack 640, V-shaped wheel group 650, support plate 660, horizontal moving motor 670.

[0046] High pressure spray gun 700.

[0047] High pressure water pump station 800, high pressure water hose 810, high pressure overflow valve 820;

[0048] Hydraulic station 900, hydraulic oil pipe 910, electric control cable 920. DETAILED DESCRIPTION

[0049] The embodiments of the present application will be further described below with reference to the drawings.

[0050] Example one:

[0051] Referring to Figures 1-7 , the water turbine generator set runner chamber concrete removal system, it includes the lower annular track 100, the upper annular track 200, the lifting tower 300 and the drive module 400, the upper annular track 200 is installed above the lower annular track 100, the lifting tower 300 is longitudinally connected with the lower annular track 100 and the upper annular track 200 through the drive module 400 at both ends, the lifting tower 300 can make annular motion along the inner circumference of the lower annular track 100 and the upper annular track 200 under the drive of the drive module 400, the lifting module 500 is installed on the lifting tower 300, the mechanical arm 600 is installed on the lifting module 500, and the high-pressure spray gun 700 is installed on the mechanical arm 600;The lower annular track 100 can be radially supported on the inner wall of the lower side draft tube of the runner chamber, and the upper annular track 200 can be axially supported at the upper side fixed guide vane of the runner chamber.

[0052] The lower annular track 100 is radially supported on the inner wall of the lower side draft tube of the runner chamber, and the upper annular track 200 is supported at the upper side fixed guide vane of the runner chamber, so that the system has a stable structure, the lifting tower 300 can make annular motion along the inner circumference of the lower annular track 100 and the upper annular track 200 under the drive of the drive module 400, the lifting module 500 can move up and down on the lifting tower 300, the mechanical arm 600 provides the high-pressure spray gun 700 with appropriate target distance and angle, and realizes automatic removal of the runner chamber concrete. The high-pressure spray gun 700 effectively acts high-pressure water on the concrete surface of the specified position of the runner chamber, and the removal of the concrete is completed efficiently and with high quality. The water turbine generator set runner chamber concrete removal system can effectively reduce the labor input, reduce the risk of personnel edge and air operation, realize efficient, high-precision, small-vibration, small-particle, green and environmentally-friendly removal of the runner chamber concrete.

[0053] Referring to Figure 1 , the lower annular track 100 includes a lower track ring 110, a plurality of lower support rods 120 are uniformly distributed and installed on the outer circumference of the lower track ring 110, and the length of the lower support rod 120 can be adjusted. Preferably, the length adjustment of the lower support rod 120 can be realized by cooperating a forward and reverse pressure nut with a forward and reverse thread rod, or by a jack.

[0054] Referring to Figure 1 The upper ring track 200 comprises an upper track ring 210, and a plurality of upper support rods 220 are evenly arranged on the outer circumferential ring of the upper track ring 210. The upper support rods 220 are longitudinally connected with support columns 230 at the ends away from the upper track ring 210. During installation, the bottom of the support column 230 is welded with the lower lining plate of the seat ring, and the support column 230 is welded and fixed against the fixed guide vane.

[0055] The lower support rods 120 and the upper support rods 220 provide stable support for the lower track ring 110 and the upper track ring 210.

[0056] Referring to Figure 1 The lifting tower 300 is a rectangular steel column structure, and the lifting module 500 is sleeved on the lifting tower 300 and slides on the lifting tower 300. The lifting tower 300 is longitudinally provided with a rack 310, and the gear of the driving device on the lifting module 500 is engaged with the rack 310, so as to drive the lifting module 500 to move up and down along the lifting tower 300. The structure is simple and stable. Specifically, the lifting module 500 is internally provided with a plurality of groove-shaped wheel sets at the four corners of the lifting tower 300. The lifting module 500 slides along the lifting tower 300 through the groove-shaped wheel sets. The driving device on the lifting module 500 is a plurality of motor reducers or hydraulic motors. The output shaft of the driving device is provided with a gear, and the gear is engaged with the rack 310. The lifting module 500 slides up and down along the lifting tower 300 through the driving device.

[0057] Referring to Figure 3 The driving module 400 comprises a connecting seat 410, one side of which is fixedly installed with the lifting tower 300, and the other side is installed with a pinch roller set 420. The driving module 400 located at the lower ring track 100 is rotationally limited connected with the lower track ring 110 through the pinch roller set 420, and the driving module 400 located at the upper ring track 200 is rotationally limited connected with the upper track ring 210 through the pinch roller set 420. The driving module 400 can drive the pinch roller set 420 to rotate, so that the lifting tower 300 moves in a ring shape along the inner circumferences of the lower ring track 100 and the upper ring track 200. Specifically, the pinch roller set 420 comprises a plurality of pinch rollers arranged in an up-down manner.

[0058] In the preferred scheme, referring to Figure 5 and Figure 3The inner ring of the lower track ring 110 of the lower annular track 100 and the inner ring of the upper track ring 210 of the upper annular track 200 are respectively provided with an inner gear ring 130, the bottom or top of the lifting tower 300 is provided with a hydraulic motor 320, the inside of the lifting tower 300 is longitudinally penetrated and rotatably provided with a transmission shaft 330, the output shaft of the hydraulic motor 320 is connected with the transmission shaft 330 for transmission, the transmission shaft 330 is provided with a transmission gear 430 at the position corresponding to the inner gear ring 130 of the lower track ring 110 and the upper track ring 210, and the transmission gear 430 is engaged with the inner gear ring 130. The transmission shaft 330 is driven to rotate by the hydraulic motor 320, so as to drive the transmission gear 430 to rotate, thereby driving the lifting tower 300 to rotate in a circle. The upper and lower drive modules 400 are simultaneously driven to operate by the transmission shaft 330, so that the synchronization is better, and the lifting tower 300 rotates in a circle more stably.

[0059] Referring to Figure 1 , 6 , 7, the mechanical arm 600 comprises a variable-diameter module 610, a rotating module 620 and a transverse movement module, the variable-diameter module 610 is a linear slide structure, the fixed side of the linear slide structure is fixedly installed with the lifting module 500, the movable side of the linear slide structure is connected with the rotating module 620, the upper side output end of the rotating module 620 is installed with a transverse movement track 630 of the transverse movement module, the transverse movement track 630 is provided with a transverse movement rack 640, the lower side of a support plate 660 is installed with a V-shaped wheel set 650, the support plate 660 is slidably installed on the transverse movement track 630 through the V-shaped wheel set 650, the support plate 660 is further installed with a transverse movement motor 670, a gear is installed on the output shaft of the transverse movement motor 670, the gear is engaged with the transverse movement rack 640 for transmission, and the high-pressure spray gun 700 is installed on the support plate 660. By arranging the variable-diameter module 610, the rotating module 620 and the transverse movement module, the high-pressure spray gun 700 can adapt to the curved surface structure in the runner chamber and can adjust the optimal target distance and angle for the high-pressure spray gun 700.

[0060] Specifically, the movable side of the variable-diameter module 610 is driven by a hydraulic motor, the rotating module 620 can adopt a structure that an inner gear ring is engaged with a gear, the gear is driven to rotate by a hydraulic motor, so as to drive the inner gear ring to rotate, or a worm gear reducer is adopted, the worm is driven to rotate by a hydraulic motor, so as to drive the turbine to rotate, and the transverse movement track 630 of the transverse movement module is fixedly installed on one side of the inner gear ring or the turbine. The transverse movement track 630 is a rectangular track, the V-shaped wheels of the V-shaped wheel set 650 clamp the transverse movement track 630 from both sides, the gear on the transverse movement motor 670 is engaged with the transverse movement rack 640 for transmission, so as to drive the high-pressure spray gun 700 to reciprocate along the transverse movement track 630. The variable-diameter module 610 is used for changing the removal radius and the target distance.

[0061] Referring to Figure 1The water turbine generator set runner chamber concrete removal system further comprises a high-pressure water pump station 800, the water outlet of the high-pressure water pump station 800 is connected with the water inlet of the high-pressure spray gun 700 through a high-pressure water hose 810, and the high-pressure water hose 810 is connected with a high-pressure overflow valve 820 in series. The high-pressure pump station 800 provides high-pressure water for the high-pressure spray gun 700.

[0062] Referring to Figure 1 Further comprising a hydraulic station 900, the hydraulic station 900 is connected with the driving module 400 and the hydraulic actuating cylinder on the mechanical arm 600 through a hydraulic oil pipe 910. The hydraulic station 900 provides power for various hydraulic actuating elements of the system.

[0063] In use, the lower support rod 120 of the lower annular track 100 is supported on the lower side draft tube cone section of the runner chamber, the support column 230 of the upper annular track 200 is back to the fixed guide vane and is welded with the lower lining plate of the seat ring, the lower support rod 120 and the upper support rod 220 respectively point to the center of the runner chamber, and are sequentially installed on the upper and lower annular tracks.

[0064] The driving module 400 on the lower side (at the lower annular track 100) is installed on the lower track ring 110, and the bottom bolts are tightened so that the pinch roller group 200 of the lower driving module 400 is in close contact with the track. The lifting tower 300 is installed on the basis of the lower driving module 400, the lifting tower 300 is assembled from bottom to top between the upper annular track 200 and the lower annular track 100, the bolt locking connection is used between tower sections to ensure close fitting and no lateral displacement.

[0065] The lifting module 500 is hoisted before the lifting tower and the driving module 400 on the upper side (at the upper annular track 200) are folded, and the limiting screw on the lifting module 500 is adjusted to be in close contact with the rack 310 of the lifting tower 300.

[0066] The driving module 400 on the upper side is installed so that the moving parts thereof are in close contact with the upper track ring 210, and the gear is driven by the hydraulic motor 320, the transmission shaft 330 connected with the spline and the shaft coupling synchronously drives the gear, so that the lifting tower 300 moves 360° synchronously along the upper annular track and the lower annular track. The upper and lower annular tracks are adjusted in levelness, roundness and height so that the lifting tower can smoothly run on the track.

[0067] The variable-diameter module 610 is fixedly connected with the lifting module 500, and the variable-diameter module 610 achieves the purpose of changing the removal radius by rack driving guide rail. The rotating module 620 is installed on the variable-diameter module 610, and the rotating shaft is driven by the hydraulic motor to realize the orientation change of the high-pressure spray gun 700 in the horizontal direction and the vertical direction, so as to meet the operation needs in multiple directions in the concrete removal process. The transverse track 630 of the transverse module is installed on the rotating module 620.

[0068] The high-pressure spray gun 700 is installed on the support plate 660, the transverse rail 630 is a rectangular rail, the V-shaped wheels of the V-shaped wheel set 650 clamp the transverse rail 630 from both sides, the gear on the transverse motor 670 is engaged with the transverse rack 640 to drive the transverse motor 670 to drive the movement of the high-pressure spray gun 700 on the transverse rail 630.

[0069] The hydraulic station 900 is a mobile hydraulic drive station, which is driven by electricity, and the oil is pressurized to a high-pressure state by a motor-driven hydraulic pump, and is transmitted to a hydraulic valve group as an inlet of a hydraulic oil pipe. The mobile hydraulic drive station is connected with the drive module 400 and the actuator moving parts on the mechanical arm 600 through the hydraulic oil pipe 910 and the electric control cable 920 to drive and control, so as to realize the movement of the mechanical arm 600 in different directions and the demolition work at different angles.

[0070] The electric control system is integrated with the hydraulic station 900, the display of the electric control system is used to display the related data of each controller, the position feedback can be realized, and the electric control system is wirelessly connected with the remote controller receiver to realize the demolition work in the two operation modes of the wireless remote control and the automatic control of the runner chamber concrete.

[0071] The high-pressure water of the main machine of the high-pressure water pump station 800 after pressurization is connected with the high-pressure spray gun 700 through the high-pressure water hose 810, the hydraulic high-pressure overflow valve 820 and the high-pressure spray gun 700, and the opening and closing of the high-pressure overflow valve 820 is controlled by the hydraulic station 900 to control the output of the high-pressure water.

[0072] Embodiment two:

[0073] The use method of the runner chamber concrete demolition system of the hydroelectric generating set comprises the following steps:

[0074] Step 1: the lower annular rail 100 is welded and assembled at the lower side of the draft tube cone section of the runner chamber, the lower support rod 120 is abutted against the inner wall of the draft tube cone section, the upper annular rail 200 is welded and assembled at the upper side of the fixed guide vane of the runner chamber of the hydroelectric generating set, the support column 230 of the upper annular rail 200 is welded against the fixed guide vane, the bottom is welded with the lower lining plate of the seat ring, the lifting tower 300 is assembled between the upper annular rail 200 and the lower annular rail 100 from bottom to top, the lifting module 500 is hoisted, the lifting module 500 is inserted into the lifting tower 300 and adjusted to the lowermost end, the variable-diameter module 610, the rotating module 620 and the transverse module of the mechanical arm 600 are sequentially installed, the high-pressure spray gun 700 is installed on the support plate 660 of the transverse module, the hydraulic oil pipe 910 of the hydraulic station 900 is connected with the hydraulic actuator on the drive module 400 and the mechanical arm 600, and the electric control cable 920 is connected with the motor reducer in the lifting module 500; the lifting tower 300, the lifting module 500 and the mechanical arm 600 are remotely controlled by the electric control system or the remote controller.

[0075] Step 2: Connect the high-pressure water hose 810 to the water outlet of the high-pressure water pump station 800, and connect the high-pressure water hose 810 to the water inlet of the high-pressure spray gun 700 through the high-pressure overflow valve 820. Control the start and stop of the high-pressure water pump station 800 and the opening and closing of the high-pressure overflow valve 820 to control the output of high-pressure water through the electric control system or remote controller.

[0076] Step 3: Before the water turbine generator set runner room concrete removal system starts operation, check the power connection of the high-pressure water pump station 800 and the hydraulic station 900 control cabinet, ensure that the motor phase sequence is correct and the cable power is correct; check the connection of the high-pressure water hose 810 and the surrounding protection; check the hydraulic oil pipe 910 and the electric control cable 920; start the hydraulic station 900 and test run, check the circumferential movement of the lifting tower 300, the up and down movement of the lifting module 500, the rotation or swing movement of the high-pressure spray gun 700.

[0077] Step 4: Turn on the high-pressure water pump station 800 and the hydraulic station 900 in turn, adjust the drive module 400 through the electric control system or remote controller, make the lifting tower 300 rotate around the lower and upper annular tracks 100 and 200, make the lifting module 500 move along the lifting tower 300 to the removal position, and then control the variable diameter module 610, the rotation module 620 and the transverse module to adjust the high-pressure spray gun 700 to the required height, target distance and angle for removing concrete; the construction personnel remotely control the high-pressure overflow valve 820 to be turned on through the electric control system or remote controller, high-pressure water is sprayed from the high-pressure spray gun 700, the high-pressure spray gun 700 reciprocates and continuously acts on the concrete surface to realize the removal of concrete in the specified area; when the concrete removal in the area is completed, turn off the high-pressure overflow valve 820, unload the water pressure in the high-pressure water hose 810, adjust the position of the high-pressure spray gun 700 to the next removal area, and repeat the operation of step 4 until the removal is completed; wherein the variable diameter module 610 is used to control the distance between the head of the high-pressure spray gun 700 and the inner wall of the concrete, the rotation module 620 is used to control the angle between the high-pressure spray gun 700 and the inner wall of the concrete, and the transverse module is used to control the left and right reciprocating movement of the high-pressure spray gun 700.

[0078] Step 5: After the runner room concrete removal is completed, cut off the water and power supply, empty the remaining water in the high-pressure water pump station 800, lower the lifting module 500 to the lowest part of the lifting tower 300, and then disassemble the hydraulic oil pipe 910, the electric control cable 920 and the high-pressure water hose 810. Disassemble the high-pressure spray gun 700, the transverse module, the rotation module 620, the variable diameter module 610 and the lifting module 500 in turn, disassemble the lifting tower 49 from top to bottom, disassemble the drive module 400 installed on the lower annular track 100, disassemble the upper annular track 200, disassemble the upper support rod 220 and the support column 230, disassemble the lower annular track 100, and disassemble the lower support rod 120.

Claims

1. A concrete removal system for the turbine runner chamber of a hydroelectric generator set, characterized in that: It includes a lower annular track (100), an upper annular track (200), a lifting tower (300), a drive module (400), a lifting module (500), a robotic arm (600), and a high-pressure spray gun (700). The upper annular track (200) is installed above the lower annular track (100). The two ends of the lifting tower (300) are longitudinally slidably limited to the lower annular track (100) and the upper annular track (200) through the drive module (400), respectively. The lifting tower (300) is located in the drive module. Driven by (400), it can make a circular motion along the inner circumference of the lower annular track (100) and the upper annular track (200). The lifting tower (300) is equipped with a lifting module (500), the lifting module (500) is equipped with a robotic arm (600), and the robotic arm (600) is equipped with a high-pressure spray gun (700). The lower annular track (100) can be radially supported with the inner wall of the tailwater pipe on the lower side of the impeller chamber, and the upper annular track (200) can be axially supported at the fixed guide vane on the upper side of the impeller chamber. The robotic arm (600) includes a variable diameter module (610), a rotation module (620), and a transverse module. The variable diameter module (610) is a slide structure. The fixed side of the slide structure is fixed to the lifting module (500), and the movable side of the slide structure is connected to the rotation module (620). The upper output end of the rotation module (620) is equipped with the transverse track (630) of the transverse module. The transverse track (630) is provided with a transverse rack (640). The lower side of the support plate (660) is equipped with a V-shaped wheel set (650). The support plate (660) is slidably mounted on the transverse track (630) through the V-shaped wheel set (650). The support plate (660) is also equipped with a transverse motor (670). The output shaft of the transverse motor (670) is equipped with a gear. The gear meshes with the transverse rack (640) for transmission. The high-pressure spray gun (700) is mounted on the support plate (660). The lower annular track (100) includes a lower track ring (110), and a number of lower support rods (120) are evenly distributed around the outer circumference of the lower track ring (110). The length of the lower support rods (120) can be adjusted by extension and retraction. The upper annular track (200) includes an upper track ring (210), and several upper support rods (220) are evenly distributed around the outer circumference of the upper track ring (210). A support column (230) is longitudinally connected to one end of the upper support rod (220) away from the upper track ring (210). The lifting tower (300) is a rectangular steel column structure. The lifting module (500) is slidably mounted on the lifting tower (300). The lifting tower (300) is longitudinally provided with a rack (310). The gear of the driving device on the lifting module (500) meshes with the rack (310), thereby driving the lifting module (500) to move up and down along the lifting tower (300). The drive module (400) includes a connecting seat (410). One side of the connecting seat (410) is fixed to the lifting tower (300), and the other side is equipped with a clamping wheel set (420). The drive module (400) located on the lower ring track (100) is connected to the lower track ring (110) for rotational limitation through the clamping wheel set (420), and the drive module (400) located on the upper ring track (200) is connected to the upper track ring (210) for rotational limitation through the clamping wheel set (420).

2. The concrete removal system for the turbine generator runner chamber according to claim 1, characterized in that: The inner ring of the lower track ring (110) of the lower annular track (100) and the inner ring of the upper track ring (210) of the upper annular track (200) are respectively equipped with internal gear rings (130). A hydraulic motor (320) is installed at the bottom or top of the lifting tower (300). A drive shaft (330) is rotatably installed longitudinally through the interior of the lifting tower (300). The output shaft of the hydraulic motor (320) is connected to the drive shaft (330) for transmission. A transmission gear (430) is installed on the drive shaft (330) at the corresponding internal gear ring (130) of the lower track ring (110) and the upper track ring (210). The transmission gear (430) meshes with the internal gear ring (130).

3. The concrete removal system for the turbine generator runner chamber according to claim 2, characterized in that: It also includes a high-pressure water pump station (800), the outlet of which is connected to the inlet of a high-pressure spray gun (700) via a high-pressure water hose (810), and the high-pressure water hose (810) is connected in series with a high-pressure overflow valve (820).

4. The concrete removal system for the turbine generator runner chamber according to claim 3, characterized in that: It also includes a hydraulic station (900), which is connected to the hydraulic actuators on the drive module (400) and the robotic arm (600) via hydraulic oil pipes (910).

5. The method of using the concrete removal system for the turbine generator runner chamber as described in claim 4, characterized in that, Includes the following steps: Step 1: Weld and assemble the lower ring track (100) on the tailrace cone section below the turbine runner chamber. The lower support rod (120) abuts against the inner wall of the tailrace cone section. Weld and assemble the upper ring track (200) at the fixed guide vane on the upper side of the turbine runner chamber. Weld the support column (230) against the fixed guide vane and weld the bottom to the lower liner of the seat ring. Assemble the lifting tower (300) from bottom to top between the upper ring track (200) and the lower ring track (100). Hoist the lifting module (500), insert the lifting module (500) into the lifting tower (300) and adjust it to the lowest position. Install the variable diameter module (610), rotation module (620), and lateral movement module of the robotic arm (600) in sequence. Install the high-pressure spray gun (700) on the support plate (660) of the lateral movement module. Connect the hydraulic oil pipe (910) of the hydraulic station (900) to the hydraulic actuators on the drive module (400) and the robotic arm (600) respectively. Connect the electrical control cable (920) to the motor reducer in the lifting module (500). Remotely control the operation of the lifting tower (300), lifting module (500), and robotic arm (600) through the electrical control system or remote controller. Step 2: Connect the high-pressure water hose (810) to the outlet of the high-pressure water pump station (800). The high-pressure water hose (810) is connected to the inlet of the high-pressure spray gun (700) via the high-pressure overflow valve (820). Control the start and stop of the high-pressure water pump station (800) and the opening and closing of the high-pressure overflow valve (820) through the electrical control system or remote control to control the output of high-pressure water. Step 3: Before starting the concrete demolition system for the turbine generator set runner chamber, check the power connection of the control cabinets of the high-pressure water pump station (800) and hydraulic station (900) to ensure that the motor phase sequence and cable power are correct; check the connection of the high-pressure water hose (810) and the surrounding protection; check the integrity of the hydraulic oil pipe (910) and electrical control cable (920); start the hydraulic station (900) and test run it, and check the circumferential movement of the lifting tower (300), the up and down movement of the lifting module (500), and the rotation or swinging movement of the high-pressure spray gun (700); Step 4: Turn on the high-pressure water pump station (800) and hydraulic station (900) in sequence. Adjust the drive module (400) through the electrical control system or remote control to make the lifting tower (300) rotate around the lower ring track (100) and upper ring track (200), so that the lifting module (500) moves along the lifting tower (300) to the demolition position. Then control the diameter changing module (610), rotation module (620) and lateral movement module to adjust the high-pressure spray gun (700) to the appropriate height, target distance and angle for demolishing concrete. The construction personnel remotely control the high-pressure overflow valve (820) through the electrical control system or remote control, and the high-pressure water is discharged from the high-pressure spray gun ( The high-pressure spray gun (700) is ejected and reciprocates, continuously acting on the concrete surface to remove the concrete in the designated area. When the concrete in the designated area is removed, the high-pressure overflow valve (820) is closed, the water pressure in the high-pressure water hose (810) is unloaded, the position of the high-pressure spray gun (700) is adjusted to the next removal area, and the operation of step 4 is repeated until the removal is completed. Among them, the variable diameter module (610) is used to control the distance between the head of the high-pressure spray gun (700) and the inner wall of the concrete, the rotation module (620) is used to control the angle between the high-pressure spray gun (700) and the inner wall of the concrete, and the transverse module is used to control the reciprocating movement of the high-pressure spray gun (700) left and right. Step 5: After the concrete of the turbine chamber is removed, cut off the water and power supply, drain the remaining water in the high-pressure water pump station (800), lower the lifting module (500) to the lowest point of the lifting tower (300), disassemble the hydraulic oil pipe (910), electrical control cable (920) and high-pressure water hose (810), and disassemble the high-pressure spray gun (700), lateral movement module, rotation module (620), diameter changing module (610) and lifting module (500) in sequence, disassemble the lifting tower (49) from top to bottom, disassemble the drive module (400) installed on the lower ring track (100), disassemble the upper ring track (200), disassemble the upper support rod (220) and support column (230), disassemble the lower ring track (100), and disassemble the lower support rod (120).

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