A multi-tool reaming device

Abstract

A multi-cutter reaming device is applied to the occasion of efficient cutting in hole, can be used for deep hole cutting, without the help of large equipment, multiple cutters can cut at the same time, easy to operate, save manpower, improve the reaming efficiency. The device is composed of hole fixing system, reaming depth feeding system, cutter diameter changing system and cutter system. The lower end of the hole fixing system is connected with the telescopic hydraulic cylinder, the telescopic hydraulic cylinder is connected with the rotary motor platform, and the rotary motor platform is connected with the cutter diameter changing system. The large plane support plate is tightly attached to the inner wall of the hole under the action of the hole fixing hydraulic cylinder, so that the whole device remains stable. The reaming depth is determined by the feeding hydraulic cylinder. When working, under the action of the cutter extension electric cylinder, the cutter diameter changing system will unfold downward, the rotary motor will make the cutter system installed on the cutter plane support plate start to rotate and cut, and the reaming diameter can be monitored in real time by the diameter displacement sensor.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of power transmission tower foundation excavation, and relates to a power transmission tower base excavation reaming technology, in particular to a multi-cutter reaming device, which realizes high-efficiency reaming cutting without the aid of large equipment, and meets the technical requirements of power transmission tower foundation excavation. BACKGROUND

[0002] The power transmission tower is a main support unit for overhead power transmission lines. It not only needs to carry heavy transmission conductors at a sufficient safe height from the ground, but also can withstand various natural disasters. It is very sensitive to inclination deformation and has high requirements for uneven settlement of the foundation. The commonly used structural form of the power transmission tower foundation is an independent foundation, an enlarged foundation and a pile foundation, and the structural form of the power transmission tower mainly adopts a steel structure. However, in some northern regions, there are more coal mines, and there are goaf areas underground. Therefore, the conventional power transmission tower and foundation structure is difficult to adapt to the ground movement in the goaf area, and may cause the power transmission tower to tilt or even overturn. The original scheme is to drill a hole with a depth of 10 meters and a diameter of 1.8 meters from the ground to the underground to fix the power transmission tower foundation. However, due to the above reasons, it is currently necessary to expand the original hole with a diameter of 1.8 meters to a hole with a diameter of 2.4 meters at a depth of about 8 meters, and the depth of the hole is 2 meters. In this way, the method of increasing the diameter of the hole at the bottom and increasing the diameter of the base hole can increase the firmness of the tower base and prevent the tower from tilting. There are great technical difficulties in expanding the diameter of the underground hole, and large reaming equipment is mostly used to realize hole reaming. However, the power transmission tower is mostly on the uphill in the wild, and the terrain is complex and the environment is harsh, so it is difficult to directly use large equipment. At present, the pile foundation reaming of the power transmission tower mostly uses small excavators, loaders and other small operating equipment, and on this basis, the equipment such as Luoyang shovel is modified to realize pile foundation excavation, and the hole is expanded by manual reaming. The manual excavation method has hidden dangers such as efficiency and personnel safety, so it is urgent to solve the equipment technology of power transmission tower reaming excavation.

[0003] In order to solve the demand for expanding the diameter of the underground hole, large equipment is mostly relied on, such as the automatic variable-diameter reaming drill disclosed in the Chinese patent with the authorization announcement number CN101315021B and the authorization announcement date of 2011.11.02, which needs to rely on the force of the drilling machine to open the variable-diameter connecting rod mechanism during work, and the cutter is installed on the connecting rod mechanism, so the cutting efficiency is not high. Similarly, the hydraulic reaming circulating drilling machine and the reaming pile construction process disclosed in the Chinese patent with the authorization announcement number CN104763328B and the authorization announcement date of 2017.03.08 use a large equipment such as a crane to support a guide rail through a hydraulic column, and the reaming tool is installed on the guide rail, and the hydraulic drive reaming bit is used for reaming. Therefore, this kind of method must rely on large equipment such as a crane and a drilling machine, and cannot be used in the environment of power transmission tower reaming cutting.

[0004] Some prior art does not rely on large equipment, but there are problems inside the device, such as the Chinese invention patent with the authorization announcement number CN102003146B and the authorization announcement date of 2012.12.12 discloses a full hydraulic reamer, the inner end of the reamer wing is equipped with an incomplete gear, the gear is engaged with the internal structure rack, the displacement of the pump is changed to expand the wing, although it does not rely on large equipment, but the operation of the device is relatively complex, and the pump pressure and the drilling pressure need to be controlled at the same time to work normally. Moreover, when using this device, the device will fall into several limit steel balls through pressure to work normally, and a steel ball needs to be thrown into the drill pipe from the ground to block the oil way at the end. In a deep hole, the inertia of the thrown steel ball is large, and if the thrown steel ball is large, other parts and the device are easily damaged, the stability and reliability of the whole device are affected, and thus the device cannot work normally. Similarly, the Chinese invention patent with the authorization announcement number CN 104806170A and the authorization announcement date of 2015.07.29 discloses a drilling and coal mining large-diameter reamer bit, which can realize variable-diameter reaming, but the structure is relatively complex, different oil pressures need to be strictly controlled to execute actions, and the oil pressure needs to control the steel ball to execute actions, and misoperation is easily caused. Also, the Chinese invention patent with the authorization announcement number CN 107083923B and the authorization announcement date of 2019.02.19 discloses a variable-diameter reaming drilling tool, which controls the position of the cam through hydraulic oil to open the reaming cutter, but the structure of the drilling tool is relatively complex, the requirements are high, the device contains multiple sealing rings, pistons and springs, and the cutter is easily damaged and has high cost because the cutter is inlaid with diamond composite pieces.

[0005] Most of the existing underground hole reaming is large equipment, which cannot meet the application requirements of the power transmission tower. Therefore, a multi-cutter reaming device is proposed, which can ream in the established vertical hole, meet the small excavation requirements of the power transmission tower, and can be used as an accessory, which is suitable for most tower construction in northern China. SUMMARY

[0006] In view of the deficiencies and defects of the above prior art, the purpose of the present application is to provide a multi-cutter reaming device, which solves the problems of the prior art, such as complex structure, few reaming mechanisms, low cutting efficiency, and the need to rely on heavy equipment. Especially when the hole is deep, it is difficult to achieve high-efficiency cutting effect.

[0007] In order to solve the above problems, the present application adopts the following technical solutions:

[0008] A multi-cutter reaming device, comprising a hole fixing system, a reaming depth feeding system, a cutter variable-diameter system and a cutter system.

[0009] The hole fixing system comprises a double-acting single-piston rod hydraulic cylinder, four large plane support plates, four large connecting rod shafts, a cross slider, four small connecting rods, and four small connecting rod shafts. The cross slider and the piston rod of the hydraulic cylinder are connected by bolts. The small connecting rods and the cross slider are connected by the small connecting rod shafts. The small connecting rods and the large plane support plates are connected by the large connecting rod shafts. When the hydraulic cylinder extends, the four small connecting rods act obliquely downward, and then the four small connecting rods push the four large plane support plates to act outward, so that the four large plane support plates are attached to the inner wall of the hole, the device is fixed at a certain position in the hole, and the device remains in a stable state.

[0010] The hole expansion depth feeding system comprises a telescopic hydraulic cylinder and a rotary motor platform. The telescopic hydraulic cylinder is a double-acting single-piston rod hydraulic cylinder. The piston rod of the telescopic hydraulic cylinder is connected to the rotary motor platform by bolts. The rotary motor is fixed on the rotary motor platform by bolts. The brush is fixed on the rotary motor platform by bolts. The rotary motor shaft is connected to the tool diameter changing system by bolts, so that the rotary motor platform and the tool diameter changing system are connected together. The telescopic hydraulic cylinder piston rod drives the rotary motor platform to act up and down as a whole. The rotary motor rotates in the forward direction to drive the tool system to rotate.

[0011] Preferably, the tool diameter changing system comprises a servo electric cylinder, an intermediate fixed disc, four tool plane support plates, four tool plane support plate connecting rods, and a piston rod slider. The piston rod slider is fixed on the piston rod of the servo electric cylinder. The tool plane support plate connecting rods are connected to the piston rod slider and the tool plane support plates by hinges, respectively. The slide rails on the tool plane support plates are matched with the slide rails on the intermediate fixed disc, so that when the piston rod slider slides downward, the tool plane support plates slide out along the slide rails.

[0012] Preferably, the tool system comprises four cutting tools and four soil retaining plates. Each tool plane support plate contains a tool and a soil retaining plate. The cutting tools are fixed on the tool plane support plates by bolts. The cutting tools contain cutting edges one and two. The cutting edge one of the tool one is responsible for cutting the two sides in the hole, and the cutting edge two is responsible for cutting the bottom side in the hole. The cutting edge one and the cutting edge two jointly complete the cutting task. The soil retaining plates are responsible for making the soil cut by the cutting tools fall down.

[0013] The depth displacement sensor is fixed on the lower plane plate of the hole fixing system by bolts. The probe of the depth displacement sensor contacts the upper plane plate of the rotary motor. Therefore, the distance information of the telescopic hydraulic cylinder extending downward can be monitored in real time by the depth displacement sensor, so that the hole expansion depth information can be clearly understood.

[0014] The diameter displacement sensor is fixed on the plane plate of the servo electric cylinder through bolts, the diameter displacement sensor probe contacts the initial position of the servo electric cylinder piston rod, the axial distance information of the servo electric cylinder piston rod monitored in real time through the diameter displacement sensor, so that the diameter information of the reaming is monitored in proportion, so that the reaming effect is better understood.

[0015] The present application has the technical features of:

[0016] The tool system contains a plurality of tools, the tool system is complete in function, and the cutting effect is good.

[0017] The extension and retraction of the tool diameter changing system rely on the extension and retraction of the servo electric cylinder, and the action is fast and reliable, and the stability is high.

[0018] The structure and shape of the tool system can be replaced and installed on the tool plane support plate, and multi-situation cutting reaming is realized.

[0019] The hole internal fixation system is driven by a hydraulic cylinder, and is stable in support.

[0020] Compared with the prior art, the present application has the beneficial technical effects of:

[0021] (1) The device has simple structure, does not need to rely on heavy equipment, can share energy with existing iron tower construction equipment such as excavators, and can be used as an accessory to meet the requirements of iron tower field excavation operation.

[0022] (2) The designed multi-tool reaming device adopts an electric cylinder (or hydraulic cylinder) to change the diameter, can meet the requirements of reaming of different sizes, and the reaming shape is controllable, can adapt to various complex environments, and improves the reaming cutting efficiency.

[0023] (3) The device is simple to operate, saves manpower, and reduces personnel safety hazards. DETAILED DESCRIPTION

[0024] Figure 1 It is a schematic view of the multi-tool reaming device of the present application.

[0025] Figure 2 It is a structure diagram of the tool diameter changing system of the present application.

[0026] Figure 3 It is an expanded structure diagram of the tool diameter changing system of the present application.

[0027] Figure 4 It is a closed structure diagram of the tool diameter changing system of the present application.

[0028] Figure 5 It is a structure diagram of the tool system of the present application.

[0029] Figure 6 It is a structure diagram of the servo electric cylinder of the present application.

[0030] Figure 7 is the structure diagram of the hole fixing system of the present application.

[0031] Figure 8 is the structure diagram of the feeding hydraulic cylinder of the present application.

[0032] Figure 9 is the working structure diagram of the hole fixing hydraulic cylinder and telescopic hydraulic cylinder of the present application.

[0033] Figure 10 is the structure diagram of the rotary motor platform of the present application.

[0034] Figure 11 is the structure diagram of the intermediate fixing disc of the present application.

[0035] Figure 12 is the structure diagram of the cutter plane support plate of the present application.

[0036] Figure 13 is the structure diagram of the depth displacement sensor of the present application.

[0037] Figure 14 is the structure diagram of the diameter displacement sensor of the present application.

[0038] The meanings of the respective labels in the figure are as follows: 1-hole fixing system, 2-feeding hydraulic cylinder, 3-rotary motor platform, 4-electric brush, 5-cutter diameter changing system, 6-cutter system.

[0039] 101-upper plane plate, 102-hole fixing hydraulic cylinder, 103-platform connecting column, 104-hole fixing hydraulic cylinder piston rod, 105-large connecting rod shaft, 106-small connecting rod shaft, 107-lower plane plate, 108-hole fixing cylinder oil inlet one, 109-hole fixing cylinder oil inlet two, 1010-connecting hard rod, 1011-cross slide block, 1012-small connecting rod, 1013-large plane support plate.

[0040] 201-oil inlet A, 202-telescopic hydraulic cylinder body, 203-oil inlet B, 204-telescopic hydraulic cylinder piston rod.

[0041] 301-rotary motor upper plane plate, 302-rotary motor, 303-rotary motor platform connecting column, 304-rotary motor lower plane plate, 305-fixed platform, 306-rotary motor shaft.

[0042] 4-electric brush.

[0043] 501-Upper plane plate of variable diameter system, 502-Servo electric cylinder, 503-Connecting column, 504-Piston rod of servo electric cylinder, 505-Piston rod slider, 506-Revolute I, 507-Tool plane support plate connecting rod, 508-Revolute II, 509-Tool plane support plate, 510-Middle fixed disc.

[0044] 5101-T-shaped guide rail.

[0045] 5902-U-shaped slide rail.

[0046] 601-Cutting tool, 602-Soil retaining plate.

[0047] 6101-Primary cutting edge, 6102-Secondary cutting edge.

[0048] 701-Depth displacement sensor wiring port, 702-Depth displacement sensor measurement probe.

[0049] 801-Diameter displacement sensor wiring port, 802-Diameter displacement sensor measurement probe. Specific implementation method

[0050] The specific content of the present application is further explained in detail in combination with the drawings and examples. The implementation range of the present application is not limited to this. Any equivalent transformation based on the technical scheme of the present application falls within the protection scope of the present application.

[0051] As Figures 1 to 14 shown is the overall result diagram and part structure diagram of the present application, the present example shows a multi-tool reaming device for realizing multi-tool high-efficiency reaming cutting in deep hole without the help of large equipment. The device mainly includes hole fixing system 1, telescopic hydraulic cylinder 2, rotary motor platform 3, brush 4, tool variable diameter system 5, tool system 6, depth displacement sensor 7, diameter displacement sensor 8.

[0052] The hole fixing system 1 includes upper plane plate 101, hole fixing hydraulic cylinder 102, platform connecting column 103, hole fixing hydraulic cylinder piston rod 104, large connecting rod shaft 105, small connecting rod shaft 106, lower plane plate 107, hole fixing cylinder oil inlet one 108, hole fixing cylinder oil inlet two 109, connecting hard rod 1010, cross slide 1011, small connecting rod 1012, large plane support plate 1013, the working principle of the hole fixing hydraulic cylinder 102 is as shown in Figure 9, the hole support oil cylinder oil circuit switching can be realized by operating the reversing valve, the P port of the reversing valve 1014 is connected with the hydraulic pump, the T port of the reversing valve 1014 is connected with the oil tank, the A port is connected with the rodless cavity of the hole support oil cylinder, and the B port is connected with the rod cavity of the hole support oil cylinder, when the reversing valve 1014 is located at the right position, the P port of the reversing valve 1014 is communicated with the A port, and the T port is communicated with the B port, when the hydraulic pump supplies oil, the piston rod 104 of the hole support hydraulic cylinder 102 extends downward, when the reversing valve 1014 is located at the left position, the P port of the reversing valve is communicated with the B port, and the T port is communicated with the A port, when the hydraulic pump supplies oil, the piston rod 104 of the hole support hydraulic cylinder 102 retracts upward, if the oil pressure of the whole hydraulic system exceeds the set oil pressure, the hydraulic oil will flow back to the oil tank through the overflow safety valve 100, the upper plane plate 101 and the lower plane plate 107 are connected through the platform connecting column 103, the cross slider 1011 is connected with the piston rod 104 of the hole support hydraulic cylinder through bolts, so that the cross slider 1011 can realize the up-down extension action with the piston rod 104, the small connecting rod 1012 is connected with the cross slider 1011 through the small connecting rod shaft 106, so that when the cross slider 1011 acts, the small connecting rod 1012 rotates around the small connecting rod shaft 106, and the large plane support plate 1013 is connected with the small connecting rod 1012 through the large connecting rod shaft 105, so as to realize the outward extension with the action of the small connecting rod.

[0053] The telescopic hydraulic cylinder 2 comprises an oil inlet A 201, a telescopic hydraulic cylinder body 202, an oil inlet B 203 and a telescopic hydraulic cylinder piston rod 204, the telescopic hydraulic cylinder piston rod 204 is connected with the lower rotary motor platform 3 through bolts, the telescopic hydraulic cylinder 2 is a double-acting single-piston rod hydraulic cylinder, the oil inlet A 201 and the oil inlet B 203 are respectively connected with the deep hole external oil pipe, and the working principle is as Figure 9The P port of the reversing valve 205 is connected with the hydraulic pump, the T port of the reversing valve 205 is connected with the oil tank, the A port of the reversing valve 205 is connected with the rodless cavity of the telescopic hydraulic cylinder, the B port of the reversing valve 205 is connected with the rod cavity of the hole-fixed hydraulic cylinder, when the reversing valve 205 is located at the right position, the P port and the A port of the reversing valve 205 are communicated, the T port and the B port are communicated, when the hydraulic pump supplies oil, the telescopic hydraulic cylinder piston rod 204 extends downward, when the reversing valve 205 is located at the left position, the P port and the B port are communicated, the T port and the A port are communicated, when the hydraulic pump supplies oil, the telescopic hydraulic cylinder piston rod 204 retracts upward, if the oil pressure of the whole hydraulic system exceeds the set oil pressure, the hydraulic oil will flow back to the oil tank through the overflow safety valve 100. When the reversing valve 205 is located at the right position, the telescopic hydraulic cylinder oil inlet A201 is connected with the oil, the telescopic hydraulic cylinder piston rod 204 extends stably, the oil returns to the oil tank through the telescopic hydraulic cylinder oil port B203, the lower part is pushed to extend downward, the lower cutter 601 is gradually cut to expand the hole, until the expansion hole depth reaches the predetermined depth. When the predetermined depth is reached, the oil supply to the oil inlet A201 is stopped, the oil supply to the oil inlet B203 is supplied, the telescopic hydraulic cylinder piston rod 204 retracts upward, the telescopic hydraulic cylinder 2 returns to the oil tank through the oil inlet A201, until the piston rod 204 is completely retracted, and the whole device returns to the initial position.

[0054] The rotating motor platform 3 comprises a rotating motor upper plane plate 301, a rotating motor 302, a rotating motor platform connecting column 303, a rotating motor lower plane plate 304, a brush 4, a fixed platform 305, and a rotating motor shaft 306. The rotating motor 302 is fixed on the rotating motor lower plane plate 304 by bolts. The upper plane plate and the lower plane plate are connected by the rotating motor platform connecting column 303. The brush 4 is fixed on the rotating motor upper plane plate 301 by bolts, which aims to provide power supply for the servo cylinder motor 5201 of the cutter diameter changing system 5. The fixed platform 305 is connected with the rotating motor shaft 306 by bolts. The rotating motor shaft 306 is connected with the cutter diameter changing system 5 by bolts, so that the cutter diameter changing system 5 rotates around the fixed platform 305 together with the cutter system 6. The rotating motor platform 3, the brush 4, the cutter diameter changing system 5, and the cutter system 6 will move with the extension and retraction of the telescopic hydraulic cylinder 2.

[0055] The tool diameter changing system 5 includes a diameter changing system upper plane plate 501, a servo electric cylinder 502, a connecting column 503, a servo electric cylinder piston rod 504, a piston rod sliding block 505, a rotating shaft one 506, a tool plane support plate connecting rod 507, a rotating shaft two 508, a tool plane support plate 509, an intermediate fixed disc 510, the servo electric cylinder 502 is fixed on the diameter changing system upper plane plate 501 by bolts, the piston rod sliding block 505 is connected with the servo electric cylinder piston rod 504 by bolts, and the piston rod sliding block 505 can slide downward with the servo electric cylinder piston rod 504 extending, one end of the tool plane support plate connecting rod 507 is connected with the piston rod sliding block 505 through the rotating shaft one 506, and the tool plane support plate connecting rod 507 can rotate with the rotating shaft one 506, the other end of the tool plane support plate connecting rod 507 is connected with the tool plane support plate 509 through the rotating shaft two 508, and the tool plane support plate connecting rod 507 can also rotate with the rotating shaft two 508, the intermediate fixed disc 510 is connected with the diameter changing system upper plane plate 501 through the connecting column 503, and the tool plane support plate 509 realizes sliding action through cooperation of the tool plane support plate U-shaped sliding rail 5902 and the T-shaped guide rail 5101 on the intermediate fixed disc 510, so that the tool plane support plate connecting rod 507 realizes pushing the tool plane support plate 509 to extend when the servo electric cylinder piston rod 504 extends downward.

[0056] The tool system 6 includes four cutting tools 601 and four soil blocking plates 602, each cutting tool 601 is fixed on the tool plane support plate 509 by bolts, and each soil blocking plate 602 is welded on each tool plane support plate 509, the cutting tool includes a main cutting edge 6101 and an auxiliary cutting edge 6102, the main cutting edge 6101 is mainly responsible for cutting the soil layers on both sides of the hole, the auxiliary cutting edge 6102 is responsible for cutting the soil layer on the bottom side of the hole and also assists the main cutting edge 6101 in cutting, and the soil blocking plate 602 is responsible for making the cut soil fall down smoothly and avoiding affecting the cutting work of the tool.

[0057] The depth displacement sensor 7 is fixed on the hole inner fixing system 1 lower plane plate 107 by bolts, one end 701 of the depth displacement sensor 7 is connected with a wire, the other end 702 is connected with the rotating motor upper plane plate 301, so that the distance information of the telescopic oil cylinder extending downward can be monitored by the depth displacement sensor 7 in real time, and the hole expansion depth information can be clearly understood.

[0058] The diameter displacement sensor 8 is fixed on the diameter changing system upper plane plate 501 of the diameter changing system 5 by bolts, one end 801 of the diameter displacement sensor 8 is connected, the other end 802 contacts the initial position of the servo electric cylinder piston rod 504, so that the axial distance information of the servo electric cylinder piston rod 504 can be monitored in real time by the diameter displacement sensor 8, according to the axial distance information of the linear displacement sensor 8, the diameter information of the reaming can be obtained according to the proportion, and the reaming effect can be better understood.

[0059] The device of the application is used,

[0060] In the first step, a hole is drilled by a drilling machine, the drilling depth should be deeper than the required depth, in order to make the reaming cutting soil fall down, the device is placed into the predetermined position of the deep hole which needs to be reamed by connecting the hard rod 1010 through the external device;

[0061] In the second step, oil is supplied to the hole fixed oil cylinder inlet two 109, the oil pressure is obtained according to G=4μPA, wherein G is the weight of the whole device, A is the cross-sectional area of the hole fixed hydraulic cylinder piston rod 104, μ is the friction coefficient under this condition, so that the piston rod 104 is stretched downward under the push of high pressure oil, the cross slide 1011 is stretched with the stretching, four small connecting rods 1012 are pushed to move obliquely downward, four large plane support plates 1013 are pushed to stretch outward and expand, when the hole fixed hydraulic cylinder piston rod 104 reaches the limit position, the movement stops, at this time, the four large plane support plates 1013 form a complete plane ring and are tightly attached to the inner wall of the hole, which can bear a large load, the whole device is fixed at a position, high pressure oil needs to be continuously supplied to the hole fixed hydraulic cylinder 102 through the hole fixed oil cylinder inlet two 109, and the oil is returned to the oil tank through the hole fixed oil cylinder inlet one 108;

[0062] In the third step, the rotating motor 302 is started, the diameter changing system 5 and the tool system 6 start to rotate around the fixed platform 305, further, the oil inlet A201 of the telescopic hydraulic cylinder 2 is continuously supplied with oil, the telescopic hydraulic cylinder piston rod 204 is steadily stretched downward, the servo electric cylinder 502 is started, the servo electric cylinder piston rod 504 is stretched, the plane support plate 509 is pushed to stretch outward along the T-shaped guide rail 5101 of the middle fixed disc 510, the cutting tool 601 rotates with the plane support plate 509, the soil cutting during reaming falls into the deep hole which has been drilled, and the reaming depth increases with the stretching of the telescopic hydraulic cylinder piston rod 204;

[0063] Fourth step, when the hole depth reaches the specified requirements, the servo motor 5201 is reversed, the servo cylinder rod 504 is retracted, the cutter flat support plate link 507 rotates inward with the shaft 508, the cutter flat support plate 509 is retracted with the cutter flat support plate link 507, at this time the telescopic hydraulic cylinder rod 204 is fully extended, the rotary motor 302 is closed, and the oil inlet B 203 of the telescopic cylinder is supplied with oil, the oil is returned to the tank through the oil inlet A 201, so that the entire device moves upward with the telescopic hydraulic cylinder rod 204, when the rod 204 is fully retracted, stop supplying oil to the telescopic cylinder 2, at this time the hole fixed cylinder oil inlet one 108 is supplied with oil, the oil is returned to the tank through the hole fixed cylinder oil inlet two 109, the hole support hydraulic cylinder rod 104 is gradually retracted, the cross slider 1011 is retracted, the four small connecting rods 1012 are retracted obliquely upward, the four large flat support plates 1013 are retracted to the original state, when the hole support hydraulic cylinder rod 104 is fully retracted, all elements return to the original state, at this time the device is retracted through the connecting hard rod 1010, and the specified action is completed.

[0064] It should be noted that the above-mentioned embodiments are illustrative of the technical solutions of the present application and are not limiting, and equivalent replacements or other modifications made by those skilled in the art according to existing technologies, as long as they do not exceed the ideas and scope of the technical solutions of the present application, should be included in the rights and scope required by the present application.

Claims

1. A multiple cutter reaming device, characterized by, It comprises a hole fixing system, a telescopic hydraulic cylinder, a rotary motor platform, a cutter diameter changing system, a cutter system, a depth displacement sensor and a diameter displacement sensor; The rotary motor platform (3) comprises a rotary motor upper plane plate (301), a rotary motor (302), a rotary motor platform connecting column (303), a rotary motor lower plane plate (304), a brush (4), a fixed platform (305), and a rotary motor shaft (306); The cutter diameter changing system (5) comprises a diameter changing system upper plane plate (501), a servo electric cylinder (502), a connecting column (503), a servo electric cylinder piston rod (504), a piston rod sliding block (505), a rotating shaft I (506), a cutter plane support plate connecting rod (507), a rotating shaft II (508), a cutter plane support plate (509), and an intermediate fixed disc (510). The servo electric cylinder (502) is fixed on the diameter changing system upper plane plate (501) by bolts. One end of the cutter plane support plate connecting rod (507) is connected with the piston rod sliding block (505) through the rotating shaft I (506), so that the cutter plane support plate connecting rod (507) can rotate with the rotating shaft I (506). The other end of the cutter plane support plate connecting rod (507) is connected with the cutter plane support plate (509) through the rotating shaft II (508), so that the cutter plane support plate connecting rod (507) can also rotate with the rotating shaft II (508). The cutter plane support plate (509) can slide through the cooperation of the cutter plane support plate U-shaped sliding rail (5902) and the T-shaped guide rail (5101) on the intermediate fixed disc (510). The cutter system (6) comprises four cutting tools (601) and four soil blocking plates (602). Each cutting tool (601) is fixed on the cutter plane support plate (509) by bolts. Each soil blocking plate (602) is welded on each cutter plane support plate (509). The soil blocking plate (602) is responsible for making the cut soil fall down smoothly, avoiding affecting the cutting work of the cutting tool. The cutting tool comprises a main cutting edge (6101) and an auxiliary cutting edge (6102). The main cutting edge (6101) is mainly responsible for cutting the soil layer on both sides of the hole. The auxiliary cutting edge (6102) is responsible for cutting the soil layer on the bottom side of the hole and also assists the main cutting edge (6101) in cutting. The multi-cutter hole expanding device adopts the diameter changing of the servo electric cylinder (502), which can meet the requirements of hole expansion of different sizes and shapes. The rotary motor shaft (306) is connected with the cutter diameter changing system (5) by bolts, so that the cutter diameter changing system (5) and the cutter system (6) can rotate around the fixed platform (305), realizing the rotary cutting action of the cutter. The rotary motor upper plane plate (301) and the rotary motor lower plane plate (304) are connected through the rotary motor platform connecting column (303). The rotary motor platform (3), the brush (4), the cutter diameter changing system (5), and the cutter system (6) move downward and upward as a whole with the extension and retraction of the telescopic hydraulic cylinder (2). The piston rod slider (505) is connected with the servo motor cylinder piston rod (504) through the bolt, and realizes downward sliding with the extension of the servo motor cylinder piston rod (504); The intermediate fixed disc (510) is connected with the variable diameter system upper plane plate (501) through the connecting column (503); When the servo motor cylinder piston rod (504) extends downward, the cutter plane support plate connecting rod (507) realizes pushing the cutter plane support plate (509) to perform the extension action through the cooperation of the cutter plane support plate U-shaped slide rail (5902) and the T-shaped guide rail (5101) on the intermediate fixed disc (510); The extension and retraction of the cutter variable diameter system (5) rely on the extension and retraction of the servo motor cylinder (502); When the telescopic hydraulic cylinder piston rod (204) extends stably, the oil liquid returns to the tank through the telescopic hydraulic cylinder oil port B (203), pushes the lower part to extend downward, and the lower cutting tool (601) gradually cuts and expands the hole until the expansion depth reaches the predetermined depth; The depth displacement sensor (7) is fixed on the lower plane plate (107) of the hole fixing system (1) through bolts, one end (701) of the depth displacement sensor (7) is connected, the other end (702) contacts the rotary motor upper plane plate (301), and is used for monitoring the distance information of the downward extension of the telescopic oil cylinder; The diameter displacement sensor (8) is fixed on the variable diameter system upper plane plate (501) of the cutter variable diameter system (5) through bolts, one end (801) of the diameter displacement sensor (8) is connected, the other end (802) contacts the initial position of the servo motor cylinder piston rod (504), and is used for monitoring the axial distance information of the servo motor cylinder piston rod (504); The multi-cutter hole expanding device obtains the diameter information of the hole expansion according to the axial distance information.

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