Pre-supporting device for reservoir vertical shaft excavation

Abstract

The utility model relates to a pre-supporting device for reservoir vertical shaft excavation. The pre-supporting device comprises an annular supporting assembly and a plurality of radial supporting assemblies. The annular supporting assembly comprises a plurality of supporting units, the multiple supporting units are sequentially connected end to end to define a rotating cavity, the multiple radial supporting assemblies are all arranged in the rotating through cavity, the outer walls of the multiple radial supporting assemblies abut against the inner circumferential wall of the rotating through cavity, and the multiple radial supporting assemblies are arranged at intervals in the center line direction of the rotating through cavity; the multiple supporting units are arranged to be spliced into the annular supporting assembly, when the whole pre-supporting device is transported, the multiple hollow supporting units are directly transported, concrete is filled when the pre-supporting device reaches a reservoir, the firmness of the pre-supporting device is not affected, the carrying weight is reduced, and transportation is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of water conservancy projects, in particular to a pre-support device for excavating a reservoir shaft. Background Art

[0002] At present, a vertical shaft is a well-shaped pipe with an upright cave wall. It is actually a collapsed funnel. Its plane outline is square, long or irregularly circular. The shaft wall is steep and almost upright. Vertical shafts are widely used in water intake, water diversion, ventilation, slag removal and air supply in water conservancy and hydropower projects. Vertical shaft construction has the characteristics of small footprint and less interference with surrounding construction. The vertical shafts in reservoir projects are used for drainage, mud removal and groundwater level detection.

[0003] The construction of the vertical shaft is a very important part of the entire reservoir project and is directly related to the overall operation effect of the reservoir. Therefore, it is necessary to strictly follow the design plan to ensure construction quality and safety. In actual construction, the construction environment and the actual situation of the reservoir must be fully considered, and the vertical shaft construction plan must be scientifically and reasonably formulated to ensure the construction quality and effect of the vertical shaft.

[0004] However, the existing reservoir shaft excavation pre-support device is heavy and difficult to transport. In addition, during installation, it is subject to resistance from water and soil, resulting in low installation efficiency and affecting the subsequent construction process. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a pre-support device for reservoir shaft excavation, which has the advantages of reducing weight and facilitating transportation; at the same time, it improves installation efficiency and construction efficiency.

[0006] The above-mentioned utility model object of the present invention is achieved through the following technical solutions: The present invention provides a pre-support device for excavation of a reservoir shaft, comprising an annular support assembly and multiple radial support assemblies; the annular support assembly comprises multiple support units, and the multiple support units are connected end to end in sequence to form a rotating cavity, and the multiple radial support assemblies are all arranged in the rotating cavity, and the outer walls of the multiple radial support assemblies are all in contact with the inner circumferential wall of the rotating cavity, and the multiple radial support assemblies are spaced apart along the center line direction of the rotating cavity.

[0007] Preferably, the pre-support device for excavation of a reservoir shaft provided by the present invention comprises a support frame and a soil drilling mechanism, a first U-shaped portion and a second U-shaped portion are respectively provided on opposite sides of the outer surface of the support frame, a first sealing strip is provided in the first U-shaped portion, a second sealing strip is provided in the second U-shaped portion, a filling cavity is provided at the top of the support frame, the filling cavity extends downward along the center line direction of the rotating cavity, a fixed partition is provided in the filling cavity, the fixed partition is provided near the bottom end of the filling cavity, and the fixed partition separates the filling cavity into a first cavity and a second cavity The fixed partition is provided with a through hole, which extends along the center line direction of the rotating through cavity. A connecting sleeve is provided in the first cavity, and the bottom end of the connecting sleeve is inserted into the through hole, and the connecting sleeve is communicated with the second cavity. The top end of the drilling mechanism passes through the second cavity and the connecting sleeve in sequence and extends to the outside. The top end of the drilling mechanism is used to be connected to an external drive motor, and the bottom end of the drilling mechanism extends downward along the center line direction of the rotating through cavity to the outside. The drilling mechanism can rotate relative to the support frame. The first cavity is used for injecting concrete.

[0008] Preferably, the pre-support device for excavating a vertical shaft of a reservoir provided by the present invention comprises a soil drilling mechanism comprising a first gear, a connecting rotating rod, two transmission units arranged opposite to each other, and three soil drilling units, the first gear being arranged in the second chamber, the first gear being able to rotate relative to the support frame, the first gear being arranged corresponding to the connecting sleeve, a connecting piece being provided at the top end of the first gear, the connecting piece being inserted into the bottom end of the connecting sleeve, the connecting piece being able to rotate relative to the connecting sleeve, the bottom end of the connecting rotating rod being inserted into the connecting sleeve, the bottom end of the connecting rotating rod being inserted into the connecting piece, the top end of the connecting rotating rod extending to the outside along the center line direction of the rotating through cavity, the top end of the connecting rotating rod being used to be connected to the driving motor, the connecting The rotating rod can rotate relative to the connecting sleeve; the two transmission units are both arranged in the second chamber, and the two transmission units are respectively arranged on opposite sides of the first gear, and the two transmission units are both meshed with the first gear. The first gear can drive the transmission unit to rotate, and the top of the transmission unit is rotatably connected to the bottom end of the fixed partition; the three drilling units are respectively arranged at the bottom end of the first gear and the bottom end of the two transmission units, the top end of the drilling unit passes through the bottom end of the support frame and is inserted into the second chamber, and is connected to the bottom end of the transmission unit or the bottom end of the first gear, the bottom end of the drilling unit extends downward to the outside along the center line direction of the connecting sleeve, and the drilling unit can rotate relative to the support frame.

[0009] Preferably, the pre-support device for reservoir shaft excavation provided by the present invention, the transmission unit includes a second gear and a third gear, the second gear and the third gear are both arranged in the second chamber, the first gear, the second gear and the third gear are arranged in sequence, the first gear and the third gear are both engaged with the second gear, the second gear is rotatably connected to the bottom end of the fixed partition through a rotating shaft, and the third gear is rotatably connected to the bottom end of the fixed partition through a rotating shaft; the soil drilling unit is arranged at the bottom end of the third gear.

[0010] Preferably, the pre-support device for excavation of a reservoir shaft provided by the present invention, the soil drilling unit includes a vertical cone rod and a spiral plate, the top end of the vertical cone rod passes through the bottom end of the support frame and is inserted into the second chamber, and is connected to the bottom end of the third gear or the bottom end of the first gear, the bottom end of the vertical cone rod extends downward to the outside along the center line direction of the connecting sleeve, and the vertical cone rod can rotate relative to the support frame; the spiral plate is arranged on the outer peripheral wall near the bottom end of the vertical cone rod, and the spiral plate is located outside the support frame.

[0011] Preferably, in the pre-support device for reservoir shaft excavation provided by the present invention, the first U-shaped portion in the support frame is adapted to the second U-shaped portion in the adjacent support frame, and the first U-shaped portion in the support frame is buckled and connected to the second U-shaped portion in the adjacent support frame.

[0012] Preferably, in the pre-support device for reservoir shaft excavation provided by the present invention, the first sealing strip and the second sealing strip are both made of silicone rubber.

[0013] Preferably, the pre-support device for reservoir shaft excavation provided by the present invention, the radial support assembly includes a connecting ring and a plurality of abutting units, the plurality of abutting units are all arranged on the outer peripheral wall of the connecting ring, the plurality of abutting units are arranged at intervals along the circumference of the connecting ring, one end of the abutting unit is connected to the outer peripheral wall of the connecting ring, the other end of the abutting unit extends outward along the radial direction of the connecting ring, and the end of the top unit facing away from the connecting ring is used to abut against the inner peripheral wall of the rotating cavity.

[0014] Preferably, the pre-support device for reservoir shaft excavation provided by the present invention, the abutting unit includes a telescopic cylinder and an arc-shaped support plate, the cylinder barrel of the telescopic cylinder is connected to the outer peripheral wall of the connecting ring, the end of the piston rod of the telescopic cylinder is connected to one side of the arc-shaped support plate, the arc-shaped support plate is adapted to the inner peripheral wall of the rotating cavity, and the side of the arc-shaped support plate facing away from the telescopic cylinder is used to abut against the inner peripheral wall of the rotating cavity.

[0015] Preferably, in the pre-support device for reservoir shaft excavation provided by the present invention, a plurality of lifting rings are provided on the top surface of the connecting ring, and the plurality of lifting rings are arranged at intervals along the circumference of the connecting ring.

[0016] In summary, the beneficial technical effects of the present invention are as follows: the pre-support device for reservoir shaft excavation provided by the present application includes an annular support assembly and multiple radial support assemblies; the annular support assembly includes multiple support units, and the multiple support units are connected end to end in sequence to form a rotating cavity, and the multiple radial support assemblies are all arranged in the rotating cavity, and the outer walls of the multiple radial support assemblies are all in contact with the inner circumferential wall of the rotating cavity, and the multiple radial support assemblies are arranged at intervals along the center line direction of the rotating cavity; by arranging multiple support units to form an annular support assembly, when transporting the entire pre-support device, multiple hollow support units are directly transported, and then filled with concrete when arriving at the reservoir, which neither affects the sturdiness of the pre-support device nor reduces the carrying weight, making transportation convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of the pre-support device for reservoir shaft excavation provided by the embodiment of the utility model. Figure 1 .

[0018] Figure 2 This is a schematic diagram of the overall structure of the pre-support device for reservoir shaft excavation provided by the embodiment of the utility model. Figure 2 .

[0019] Figure 3 It is a top view of a pre-support device for reservoir shaft excavation provided by an embodiment of the utility model.

[0020] Figure 4 yes Figure 3 Enlarged view of point A in the middle.

[0021] Figure 5 It is a cross-sectional view of a support unit in a pre-support device for reservoir shaft excavation provided by an embodiment of the utility model.

[0022] Figure 6 yes Figure 5 Enlarged view of point B in the middle.

[0023] Figure 7 It is a structural schematic diagram of a radial support device in a pre-support device for reservoir shaft excavation provided by an embodiment of the utility model.

[0024] In the figure, 1, pre-support device; 10, annular support assembly; 11, rotating cavity; 12, support unit; 121, support frame; 1211, first U-shaped portion; 1212, second U-shaped portion; 1213, first sealing strip; 1214, second sealing strip; 1215, filling cavity; 1216, first chamber; 1217, second chamber; 1218, fixed partition; 1219, connecting sleeve; 122, drill Soil mechanism; 1221, first gear; 1222, connecting rod; 1223, transmission unit; 1224, second gear; 1225, third gear; 1226, soil drilling unit; 1227, vertical cone rod; 1228, spiral plate; 1229, connecting piece; 20, radial support assembly; 21, connecting ring; 211, lifting ring; 22, top unit; 221, telescopic cylinder; 222, arc support plate. DETAILED DESCRIPTION

[0025] The present invention will be described in further detail below with reference to the accompanying drawings.

[0026] Reference Figures 1 to 3 The utility model discloses a pre-support device 1 for excavating a vertical shaft of a reservoir, comprising an annular support assembly 10 and a plurality of radial support assemblies 20; the annular support assembly 10 comprises a plurality of support units 12, and the plurality of support units 12 are connected end to end in sequence to form a rotating cavity 11, and the plurality of radial support assemblies 20 are all arranged in the rotating cavity, and the outer walls of the plurality of radial support assemblies 20 are all in contact with the inner circumferential wall of the rotating cavity, and the plurality of radial support assemblies 20 are arranged at intervals along the center line direction of the rotating cavity; on the one hand, by arranging a plurality of support units 12 to form an annular support assembly 10, the carrying weight is reduced and transportation is convenient; on the other hand, by arranging the radial support assemblies 20, the soil in the inner cavity of the annular support assembly 10 is prevented from being damaged by excessive pressure from the soil and water on the outer side after the soil in the inner cavity of the annular support assembly 10 is dug out, thereby improving the supporting effect of the annular support assembly 10.

[0027] Specifically, the center lines of the plurality of radial support assemblies 20 are arranged parallel to the center line of the rotating through cavity. In some practicable embodiments, the center lines of the radial support assemblies 20 and the center line of the rotating through cavity are arranged collinearly.

[0028] The construction process of the pre-support device 1 for reservoir shaft excavation provided in this embodiment is as follows: concrete is injected into a plurality of support units 12, and after the concrete solidifies, the support unit 12 with concrete is lifted by a crane. After the target area for vertical excavation is determined, the crane drives the support unit 12 to move above the target area, and the support unit 12 is inserted into the ground to a preset depth, with the top of the support unit 12 above the water surface; the above steps are repeated until the plurality of support units 12 are spliced into an annular support assembly 10, and the annular support assembly 10 is pre-supported; the soil inside the annular support assembly 10 is excavated to a predicted depth by a well digging device, and the radial support assembly 20 is lifted and lowered into the rotating cavity by a crane, and the outer wall of the radial support assembly 20 is against the inner circumferential wall of the rotating cavity; the well digging device is continued to be used to dig downward, and a radial support assembly 20 is used for support each time the predicted depth is reached until the well is completed.

[0029] Continue to refer to Figures 4 to 6 In this embodiment, the support unit 12 includes a support frame 121 and a soil drilling mechanism 122. A first U-shaped portion 1211 and a second U-shaped portion 1212 are respectively provided on opposite sides of the outer surface of the support frame 121. A first sealing strip 1213 is provided in the first U-shaped portion 1211, and a second sealing strip 1214 is provided in the second U-shaped portion 1212. A filling cavity 1215 is provided at the top of the support frame 121. The filling cavity 1215 extends downward along the center line of the rotating cavity 11. A fixed partition 1218 is provided in the filling cavity 1215. The fixed partition 1218 is provided near the bottom end of the filling cavity 1215. The fixed partition 1218 divides the filling cavity 1215 into a first chamber 1216 and a second chamber 1217. A through hole is provided on the fixed partition 1218. The through hole extends along the center line of the rotating cavity. The centerline direction of the rotating cavity is extended, and a connecting sleeve 1219 is provided in the first chamber 1216. The bottom end of the connecting sleeve 1219 is inserted in the through hole, and the connecting sleeve 1219 is communicated with the second chamber 1217; the top of the drilling mechanism 122 passes through the second chamber 1217 and the connecting sleeve 1219 in turn and extends to the outside. The top of the drilling mechanism 122 is used to be connected to an external drive motor, and the bottom end of the drilling mechanism 122 extends downward to the outside along the centerline direction of the rotating cavity, and the drilling mechanism 122 can rotate relative to the support frame 121; the first chamber 1216 is used for injecting concrete; by arranging the first sealing strip 1213 and the second sealing strip 1214, the first sealing strip 1213 and the second sealing strip 1214 are used to block the water outside the annular support assembly 10 from flowing into the inner cavity, so as to facilitate subsequent well digging construction.

[0030] Specifically, the top surface of the connecting sleeve 1219 and the top surface of the support frame 121 are located in the same plane, and the center line of the connecting sleeve 1219 is arranged parallel to the center line of the rotating cavity.

[0031] The fixed partition 1218 is arranged parallel to the horizontal plane, the through hole is opened at the geometric center position of the fixed partition 1218, and the bottom end of the connecting sleeve 1219 is inserted into the through hole.

[0032] by Figure 5 Taking the shown orientation as an example, the first U-shaped portion 1211 is located on the left side of the support frame 121, and the second U-shaped portion 1212 is located on the right side of the support frame 121, wherein the opening direction of the first U-shaped portion 1211 is toward one side of the radial support assembly 20, and the opening direction of the second U-shaped portion 1212 is away from one side of the radial support assembly 20.

[0033] Furthermore, in this embodiment, the first U-shaped portion 1211 in the support frame 121 is adapted to the second U-shaped portion 1212 in its adjacent support frame 121, and the first U-shaped portion 1211 in the support frame 121 is connected to the second U-shaped portion in its adjacent support frame 121 by snapping; by setting the first U-shaped portion 1211 and the second U-shaped portion 1212, it is convenient to connect multiple support units 12 in sequence.

[0034] For the convenience of description, two adjacent support frames 121 are taken as an example for explanation below.

[0035] Continue to refer to Figure 4 ,by Figure 4 Taking the shown orientation as an example, two adjacent support frames 121 include a first support frame 121 and a second support frame 121, the right side plate of the first U-shaped portion 1211 on the first support frame 121 is inserted into the second U-shaped portion 1212 on the second support frame 121, and the left side plate of the second U-shaped portion 1212 on the second support frame 121 is inserted into the first U-shaped portion 1211 on the first support frame 121, the right side plate of the first U-shaped portion 1211 on the first support frame 121 abuts against the inner side wall of the second U-shaped portion 1212 on the second support frame 121, and the left side plate of the second U-shaped portion 1212 on the second support frame 121 abuts against the inner side wall of the first U-shaped portion 1211 on the first support frame 121.

[0036] Among them, the right side plate of the first U-shaped part 1211 on the first support frame 121 contacts the second sealing strip 1214 in the second U-shaped part 1212 on the second support frame 121, and the left side plate of the second U-shaped part 1212 on the second support frame 121 contacts the first sealing strip 1213 in the first U-shaped part 1211 on the first support frame 121.

[0037] For example, the first sealing strip 1213 and the second sealing strip 1214 can be made of silicone rubber. Of course, the first sealing strip 1213 and the second sealing strip 1214 can also be made of nitrile rubber.

[0038] Continue to refer to Figure 5 and Figure 6In this embodiment, the soil drilling mechanism 122 includes a first gear 1221, a connecting rod 1222, two transmission units 1223 arranged opposite to each other, and three soil drilling units 1226. The first gear 1221 is arranged in the second chamber 1217. The first gear 1221 can rotate relative to the support frame 121. The first gear 1221 is corresponding to the connecting sleeve 1219. A connecting piece 1229 is provided at the top of the first gear 1221. The connecting piece 1229 is inserted at the bottom end of the connecting sleeve 1219. The connecting piece 1229 can rotate relative to the support frame 121. The connecting sleeve 1219 rotates, the bottom end of the connecting rotating rod 1222 is inserted into the connecting sleeve 1219, the bottom end of the connecting rotating rod 1222 is inserted into the connecting piece 1229, the top end of the connecting rotating rod 1222 extends to the outside along the center line direction of the rotating cavity, the top end of the connecting rotating rod 1222 is used to connect to the driving motor, and the connecting rotating rod 1222 can rotate relative to the connecting sleeve 1219; the driving motor is used to drive the connecting rotating rod 1222 to rotate, and the connecting rotating rod 1222 drives the first gear 1221 to rotate through the connecting piece 1229.

[0039] Specifically, the connecting rod 1222 and the connecting piece 1229 are pluggable and connected, and the center line of the connecting rod 1222 is set parallel to the center line of the connecting sleeve 1219. In some feasible methods, the center line of the connecting rod 1222 and the center line of the connecting sleeve 1219 are set collinearly.

[0040] Among them, the connecting member 1229 can be a bearing. During use, the center line of the bearing is arranged collinearly with the center line of the connecting sleeve 1219, the outer peripheral wall of the outer ring of the bearing abuts against the inner peripheral wall of the connecting sleeve 1219, and the bottom end of the connecting rotating rod 1222 is inserted into the inner ring of the bearing. The bottom surface of the inner ring of the bearing is connected to the top surface of the first gear 1221. During use, the connecting rotating rod 1222 rotates to drive the inner ring of the bearing to rotate, and the inner ring of the bearing drives the first gear 1221 to rotate.

[0041] In this embodiment, the two transmission units 1223 are both arranged in the second chamber 1217, and the two transmission units 1223 are respectively arranged on opposite sides of the first gear 1221. The two transmission units 1223 are both meshed with the first gear 1221, and the first gear 1221 can drive the transmission units 1223 to rotate. The top of the transmission unit 1223 is rotatably connected to the bottom end of the fixed partition 1218; the three drilling units 1226 are respectively arranged at the bottom end of the first gear 1221 and the two transmission units 122 3, the top end of the soil drilling unit 1226 passes through the bottom end of the support frame 121 and is inserted into the second chamber 1217, and is connected to the bottom end of the transmission unit 1223 or the bottom end of the first gear 1221. The bottom end of the soil drilling unit 1226 extends downward to the outside along the center line direction of the connecting sleeve 1219, and the soil drilling unit 1226 can rotate relative to the support frame 121. By providing the soil drilling unit 1226, the speed of inserting the support frame 121 into the water body and the soil body is improved, thereby improving the construction efficiency.

[0042] Furthermore, in this embodiment, the transmission unit 1223 includes a second gear 1224 and a third gear 1225, and the second gear 1224 and the third gear 1225 are both arranged in the second chamber 1217, and the first gear 1221, the second gear 1224 and the third gear 1225 are arranged in sequence, and the first gear 1221 and the third gear 1225 are both engaged with the second gear 1224, and the second gear 1224 is rotatably connected to the bottom end of the fixed partition 1218 through a rotating shaft, and the third gear 1225 is rotatably connected to the bottom end of the fixed partition 1218 through a rotating shaft; the drilling unit 1226 is arranged at the bottom end of the third gear 1225.

[0043] Specifically, the center line of the second gear 1224 and the center line of the third gear 1225 are both arranged parallel to the center line of the first gear 1221 .

[0044] Among them, the center line of the rotating shaft and the center line of the rotating shaft are both set parallel to the center line of the connecting sleeve 1219, the top end of the rotating shaft is rotatably connected to the bottom end of the fixed partition 1218, the bottom end of the rotating shaft is connected to the top of the second gear 1224, the top end of the rotating shaft is rotatably connected to the bottom end of the fixed partition 1218, and the bottom end of the rotating shaft is connected to the top of the third gear 1225.

[0045] Specifically, the top end of the soil drilling unit 1226 passes through the bottom end of the support frame 121 and is inserted into the second chamber 1217 and connected to the bottom end of the third gear 1225 .

[0046] Furthermore, in this embodiment, the soil drilling unit 1226 includes a vertical cone rod 1227 and a spiral plate 1228. The top of the vertical cone rod 1227 passes through the bottom end of the support frame 121 and is inserted into the second chamber 1217 and is connected to the bottom end of the third gear 1225 or the bottom end of the first gear 1221. The bottom end of the vertical cone rod 1227 extends downward to the outside along the center line direction of the connecting sleeve 1219, and the vertical cone rod 1227 can rotate relative to the support frame 121. The spiral plate 1228 is arranged on the outer peripheral wall near the bottom end of the vertical cone rod 1227, and the spiral plate 1228 is located outside the support frame 121; by arranging the vertical cone rod 1227 and the spiral plate 1228, the driving motor is used to drive the vertical cone rod 1227 and the spiral plate 1228 to rotate so that the support frame 121 can be inserted into the water body and the soil body more quickly, thereby making the assembly between multiple support frames 121 faster and more efficient, thereby improving the construction efficiency of the pre-support device 1.

[0047] Specifically, the center line of the vertical tapered rod 1227 is arranged parallel to the center line of the first gear 1221 . In some practicable embodiments, the center line of the vertical tapered rod 1227 is arranged colinearly with the center line of the first gear 1221 or the center line of the third gear 1225 .

[0048] The construction process of the pre-support device 1 for reservoir shaft excavation provided in this embodiment is as follows: first, concrete is injected into the first chambers 1216 of multiple support frames 121. After the concrete solidifies, the connecting rod 1222 is installed in the connecting piece 1229, and the support frame 121 is lifted by a crane. The top of the connecting rod 1222 is connected to the driving motor. After the target area for shaft excavation is determined, the crane drives the support frame 121 to move above the target area, and then the lifting equipment is used to push the support frame 121 downward. At the same time, the driving motor drives the connecting rod 1222 to rotate, so that the vertical cone rod 1227 and the spiral plate 1228 rotate until the support frame 121 moves down to the preset depth, and The top of the support frame 121 is higher than the water surface. The connecting rotating rod 1222 is removed and concrete is injected into the inner cavity of the connecting sleeve. The above operation is repeated for the remaining support frames 121 until multiple support frames 121 are spliced into an annular support assembly 10, which is pre-supported by the annular support assembly 10; then the soil inside the annular support assembly 10 is excavated to the predicted depth using well digging equipment, and the radial support assembly 20 is hoisted into the annular support assembly 10 using a crane, and each telescopic cylinder 221 is started to make the arc support plate 222 rest against the inner wall of the rotating cavity, and the well digging equipment is continued to dig downward. Every time the predicted depth is reached, a radial support assembly 20 is used for support until the well is completed.

[0049] Continue to refer to Figure 7In this embodiment, the radial support assembly 20 includes a connecting ring 21 and a plurality of abutting units 22. The plurality of abutting units 22 are all arranged on the outer peripheral wall of the connecting ring 21. The plurality of abutting units 22 are arranged at intervals along the circumference of the connecting ring 21. One end of the abutting unit 22 is connected to the outer peripheral wall of the connecting ring 21, and the other end of the abutting unit 22 extends outward along the radial direction of the connecting ring 21. The end of the top unit facing away from the connecting ring 21 is used to abut against the inner peripheral wall of the rotating cavity.

[0050] During use, the center line of the connecting ring 21 is arranged parallel to the center line of the rotating cavity. In some feasible embodiments, the center line of the connecting ring 21 is arranged collinearly with the center line of the rotating cavity.

[0051] Furthermore, in this embodiment, the push-up unit 22 includes a telescopic cylinder 221 and an arc-shaped support plate 222. The cylinder barrel of the telescopic cylinder 221 is connected to the outer peripheral wall of the connecting ring 21, and the end of the piston rod of the telescopic cylinder 221 is connected to one side of the arc-shaped support plate 222. The arc-shaped support plate 222 is adapted to the inner peripheral wall of the rotating cavity, and the side of the arc-shaped support plate 222 facing away from the telescopic cylinder 221 is used to push against the inner peripheral wall of the rotating cavity.

[0052] Specifically, the piston rod of the telescopic cylinder 221 extends along the radial direction of the connecting ring 21 , and one end of the piston rod of the telescopic cylinder 221 away from the connecting ring 21 is connected to the arc-shaped support plate 222 .

[0053] Furthermore, in this embodiment, a plurality of hanging rings 211 are provided on the top surface of the connecting ring 21 , and the plurality of hanging rings 211 are arranged at intervals along the circumference of the connecting ring 21 .

[0054] The construction process of the pre-support device 1 for reservoir shaft excavation provided in this embodiment is as follows:

[0055] 1. Concrete is poured into the first chambers 1216 of the multiple support frames 121.

[0056] 2. After the concrete solidifies, the bottom end of the connecting rod 1222 is inserted into the connecting sleeve 1219 and installed on the connecting piece 1229. The support frame 121 with concrete is lifted by a crane, and the top of the connecting rod 1222 is connected to the drive motor. After determining the target area for shaft excavation, the crane drives the support frame 121 to move above the target area, and then the lifting equipment is used to push the support frame 121 downward. At the same time, the drive motor drives the connecting rod 1222 to rotate, causing the vertical cone rod 1227 and the spiral plate 1228 to rotate until the support frame 121 moves down to the preset depth and the top of the support frame 121 is above the water surface. The connecting rod 1222 is removed and concrete is injected into the inner cavity of the connecting sleeve.

[0057] Specifically, when the support frame 121 is installed in the target area, the driving motor connected to the connecting rod 1222 drives the first gear 1221 to rotate, the first gear 1221 drives the second gear 1224 to rotate, and the second gear 1224 drives the third gear 1225 to rotate, so that the vertical cone rod 1227 and the spiral plate 1228 rotate. When the support frame 121 enters the water body and the soil, the vertical cone rod 1227 and the spiral plate 1228 enter first. Under the rotation of the vertical cone rod 1227 and the spiral plate 1228, the support frame 121 can be inserted into the water body and the soil faster, thereby improving the construction efficiency of the pre-support device 1. After the first support frame 121 is installed, the connecting rod 1222 is removed from the connecting piece 1229 and concrete is injected into the inner cavity of the connecting sleeve.

[0058] 3. Repeat the installation process of step 2 above for the remaining support frames 121. During installation, the first U-shaped portion 1211 on the second support frame 121 should be inserted into the second U-shaped portion 1212 on the first support frame 121 until all the support frames 121 are installed, and the second U-shaped portion 1212 on the last support frame 121 is inserted into the first U-shaped portion 1211 on the first support frame 121, so that all the support frames 121 form a ring. Then, concrete is injected into the inner cavity of the connecting sleeve in all the support frames 121. Under the joint support of the concrete in the first chamber 1216 and the concrete in the connecting sleeve, the firmness of the annular support assembly 10 is improved. Through the engagement of the first U-shaped portion 1211 and the second U-shaped portion 1212, and the sealing effect of the first sealing strip 1213 and the second sealing strip 1214, water outside the annular support assembly 10 is blocked from flowing into the inner cavity, which facilitates subsequent well digging construction. When transporting the entire pre-support device 1, multiple hollow support frames 121 are directly transported and then filled with concrete when arriving at the reservoir. This does not affect the firmness of the pre-support device 1, reduces the carrying weight, and is more convenient for transportation.

[0059] 4. Use the well digging equipment to excavate the soil inside the annular support assembly 10 to the predicted depth, and use the crane to lift the radial support assembly 20 into the rotating cavity. The outer wall of the radial support assembly 20 abuts against the inner wall of the rotating cavity.

[0060] Among them, the soil inside the annular support assembly 10 is excavated to the predicted depth by using well digging equipment, and the radial support assembly 20 is hoisted into the rotating cavity by using a crane, and each telescopic cylinder 221 is started to make the arc support plate 222 rest against the inner wall of the rotating cavity.

[0061] Specifically, a lifting rope is fixed to the lifting ring 211, and then the radial support assembly 20 is lifted by a crane so that the radial support assembly 20 is on the central axis of the annular support assembly 10. Every time the excavation reaches the predicted depth, the radial support assembly 20 is placed in the rotating cavity, and all the telescopic cylinders 221 are started to extend it, so that the arc support plate 222 is against the inner wall of the rotating cavity. Multiple telescopic cylinders 221 and arc support plates 222 are used to make the radial support assembly 20 radially support the annular support assembly 10 to prevent the soil and water outside the annular support assembly 10 from exerting excessive pressure on the annular support assembly 10 after the soil in the annular rotating cavity is dug out, thereby improving the support effect of the annular support assembly 10.

[0062] 5. Continue to dig downward using the well digging equipment, using a radial support assembly 20 for support each time the predicted depth is reached until the well is completed.

[0063] The pre-support device 1 for reservoir shaft excavation provided in the present application includes an annular support assembly 10 and multiple radial support assemblies 20; the annular support assembly 10 includes multiple support units 12, and the multiple support units 12 are connected end to end in sequence to form a rotating cavity 11, and the multiple radial support assemblies 20 are all arranged in the rotating cavity, and the outer walls of the multiple radial support assemblies 20 are all in contact with the inner circumferential wall of the rotating cavity, and the multiple radial support assemblies 20 are arranged at intervals along the center line direction of the rotating cavity; by arranging multiple support units 12 to form an annular support assembly 10, when transporting the entire pre-support device 1, multiple hollow support units 12 are directly transported, and then filled with concrete when arriving at the reservoir, which does not affect the sturdiness of the pre-support device 1, reduces the carrying weight, and facilitates transportation.

[0064] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus comprising the element.

[0065] Finally, it should be noted that the above embodiments are merely examples for the purpose of illustrating the present invention and are not intended to limit the embodiments. Those skilled in the art will readily appreciate that other variations or modifications based on the above description are possible. It is not necessary and impossible to provide an exhaustive list of all possible embodiments. However, any obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A pre-support device for reservoir shaft excavation, characterized by: It includes an annular support assembly and a plurality of radial support assemblies; The annular support assembly includes a plurality of support units, wherein the plurality of support units are sequentially connected end to end to form a rotating cavity, wherein the plurality of radial support assemblies are disposed in the rotating cavity, wherein the outer walls of the plurality of radial support assemblies abut against the inner circumferential wall of the rotating cavity, and the plurality of radial support assemblies are spaced apart along the centerline direction of the rotating cavity; The support unit includes a support frame and a soil drilling mechanism, a first U-shaped portion and a second U-shaped portion are respectively provided on opposite sides of the outer surface of the support frame, a first sealing strip is provided in the first U-shaped portion, and a second sealing strip is provided in the second U-shaped portion, a filling cavity is provided at the top of the support frame, the filling cavity extends downward along the center line direction of the rotating cavity, a fixed partition is provided in the filling cavity, the fixed partition is provided near the bottom end of the filling cavity, the fixed partition divides the filling cavity into a first chamber and a second chamber, a through hole is provided on the fixed partition, the through hole extends along the center line direction of the rotating cavity, a connecting sleeve is provided in the first chamber, the bottom end of the connecting sleeve is inserted into the through hole, and the connecting sleeve is communicated with the second chamber; The top end of the soil drilling mechanism sequentially passes through the second chamber and the connecting sleeve and extends to the outside. The top end of the soil drilling mechanism is used to be connected to an external drive motor. The bottom end of the soil drilling mechanism extends downwardly along the center line of the rotating cavity and to the outside. The soil drilling mechanism is capable of rotating relative to the support frame. The first chamber is used for injecting concrete.

2. The pre-support device for reservoir shaft excavation according to claim 1, characterized in that: The soil drilling mechanism includes a first gear, a connecting rotating rod, two transmission units arranged opposite to each other, and three soil drilling units, the first gear is arranged in the second chamber, the first gear can rotate relative to the support frame, the first gear is arranged corresponding to the connecting sleeve, the top of the first gear is provided with a connecting piece, the connecting piece is inserted in the bottom end of the connecting sleeve, the connecting piece can rotate relative to the connecting sleeve, the bottom end of the connecting rotating rod is inserted in the connecting sleeve, the bottom end of the connecting rotating rod is inserted in the connecting piece, the top end of the connecting rotating rod extends to the outside along the center line direction of the rotating cavity, the top end of the connecting rotating rod is used to be connected to the driving motor, and the connecting rotating rod can rotate relative to the connecting sleeve; The two transmission units are both disposed in the second chamber, and are respectively disposed on opposite sides of the first gear. The two transmission units are both meshed with the first gear, and the first gear is capable of driving the transmission units to rotate. The top end of the transmission unit is rotatably connected to the bottom end of the fixed partition. The three soil drilling units are respectively arranged at the bottom end of the first gear and the bottom end of the two transmission units. The top end of the soil drilling unit passes through the bottom end of the support frame and is inserted into the second chamber, and is connected to the bottom end of the transmission unit or the bottom end of the first gear. The bottom end of the soil drilling unit extends downward to the outside along the center line direction of the connecting sleeve, and the soil drilling unit can rotate relative to the support frame.

3. The pre-support device for reservoir shaft excavation according to claim 2, characterized in that: The transmission unit includes a second gear and a third gear, the second gear and the third gear are both arranged in the second chamber, the first gear, the second gear and the third gear are arranged in sequence, the first gear and the third gear are both engaged with the second gear, the second gear is rotatably connected to the bottom end of the fixed partition through a rotating shaft, and the third gear is rotatably connected to the bottom end of the fixed partition through a rotating shaft; the soil drilling unit is arranged at the bottom end of the third gear.

4. The pre-support device for reservoir shaft excavation according to claim 3, characterized in that: The soil drilling unit includes a vertical tapered rod and a spiral plate. The top end of the vertical tapered rod passes through the bottom end of the support frame and is inserted into the second chamber and connected to the bottom end of the third gear or the bottom end of the first gear. The bottom end of the vertical tapered rod extends downward to the outside along the center line direction of the connecting sleeve, and the vertical tapered rod can rotate relative to the support frame. The spiral plate is arranged on the outer peripheral wall close to the bottom end of the vertical cone rod, and the spiral plate is located outside the support frame.

5. The pre-support device for reservoir shaft excavation according to claim 1, characterized in that: The first U-shaped portion in the support frame is matched with the second U-shaped portion in the adjacent support frame, and the first U-shaped portion in the support frame is buckled and connected with the second U-shaped portion in the adjacent support frame.

6. The pre-support device for reservoir shaft excavation according to claim 1, characterized in that: The first sealing strip and the second sealing strip are both made of silicone rubber.

7. The pre-support device for reservoir shaft excavation according to claim 1, characterized in that: The radial support assembly includes a connecting ring and a plurality of abutting units, wherein the plurality of abutting units are arranged on the outer peripheral wall of the connecting ring, and the plurality of abutting units are arranged at intervals along the circumference of the connecting ring. One end of the abutting unit is connected to the outer peripheral wall of the connecting ring, and the other end of the abutting unit extends outward along the radial direction of the connecting ring. The end of the abutting unit facing away from the connecting ring is used to abut against the inner peripheral wall of the rotating cavity.

8. The pre-support device for reservoir shaft excavation according to claim 7, characterized in that: The pushing unit includes a telescopic cylinder and an arc-shaped support plate, the cylinder barrel of the telescopic cylinder is connected to the outer peripheral wall of the connecting ring, the end of the piston rod of the telescopic cylinder is connected to one side of the arc-shaped support plate, the arc-shaped support plate is adapted to the inner peripheral wall of the rotating cavity, and the side of the arc-shaped support plate facing away from the telescopic cylinder is used to push against the inner peripheral wall of the rotating cavity.

9. The pre-support device for reservoir shaft excavation according to claim 7, characterized in that: A plurality of hanging rings are arranged on the top surface of the connecting ring, and the plurality of hanging rings are arranged at intervals along the circumference of the connecting ring.

Images