Large-diameter reaming device for deep hole

Abstract

A big diameter expansion device for deep hole is applied to the occasion where it is inconvenient to use large equipment and big diameter cutting is needed, which is convenient to carry, saves manpower and cost, and improves the expansion efficiency. The device is composed of hole fixing system, expansion depth feeding system, expansion tool platform and expansion tool system. The device only needs to be connected with the hole fixing system outside the hole, the lower end of the hole fixing system is connected with the feeding hydraulic cylinder, the feeding hydraulic cylinder is connected with the rotary motor platform, and the rotary motor platform is connected with the expansion tool platform. The big 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 expansion depth is determined by the feeding hydraulic cylinder. When working, the cutter sliding sleeve will act downward under the action of the stretching electric cylinder, the cutter gear will also rotate outward, so that the expansion spiral cutter opens, the whole device rotates and cuts under the action of the rotary motor, and the expansion diameter can also 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 and reaming technology, in particular to a large-diameter reaming device for deep holes, which can realize efficient reaming and cutting without the aid of large equipment and meet the technical requirements of power transmission tower foundation excavation. BACKGROUND

[0002] A 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 needs to withstand various natural disasters. It is very sensitive to inclination deformation and has high requirements for uneven settlement of the foundation. The commonly used structure of the power transmission tower foundation is an independent foundation, an enlarged foundation, and a pile foundation. The structure 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. The depth of this hole is 2 meters. In this way, the method of increasing the diameter of the hole at the bottom of the base can increase the firmness of the tower base and prevent the tower from overturning. 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, most power transmission towers are on slopes 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 the equipment is modified on the basis of the equipment to realize pile foundation excavation and artificial reaming.

[0003] To solve the demand for expanding the diameter of the underground hole, many existing technologies rely on heavy equipment. For example, a hydraulic variable-diameter reaming drill bit of a long spiral drilling machine is disclosed in Chinese Utility Model Patent No. CN210178271U, authorized on March 24, 2020. The drill bit is installed on a long spiral drill rod, but the long spiral drill rod and other elements are hoisted and fixed by heavy equipment such as a crane to work normally. Similarly, a hydraulic reaming circulating drilling machine and a reaming pile construction process are disclosed in Chinese Invention Patent No. CN104763328B, authorized on March 8, 2017. The reaming tool is installed on the guide rail supported by the hydraulic column through the large equipment such as the crane, and the hydraulic drive reaming drill bit can ream the hole, so this method must rely on heavy equipment such as a crane and cannot be used in power transmission tower reaming and cutting.

[0004] There are also some prior art without the help of heavy equipment, but the device structure has problems, such as the Chinese utility model patent with the authorization announcement number CN 203008787U and the authorization announcement date of 2013.06.19 discloses a hydraulic mechanical type while drilling variable diameter reaming drill bit, which is opened by the pressure of hydraulic oil through the piston system, but this device contains many parts such as large spring, small spring, upper shell, middle shell, lower shell and the structure is too complex, and the oil pressure control requirement is relatively high, different oil pressure should overcome different spring force to work, which is easy to misoperation or not to achieve the ideal expected effect, and this device is generally suitable for small variable diameter occasions, if it is a large variable diameter occasion, it is not easy to install a large drill bit on this structure. There are also some like the Chinese invention patent with the authorization announcement number CN 102003146B and the authorization announcement date of 2012.12.12 discloses a full hydraulic reamer, the inner end of the reamer wing is installed with an incomplete gear, the gear is engaged with the internal structure rack, the reamer wing is opened by changing the displacement of the pump, although it does not need to rely on heavy equipment, but the structure of the device is 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, it will fall into several limit steel balls through pressure to work normally, and a steel ball needs to be put into the drill pipe from the ground to block the oil way at the end, in the deep hole, the inertia of the steel ball is large, if the drill bit is large, the steel ball to be put in is also large, which is easy to damage other parts and the device, affecting the stability and reliability of the whole device, so that it cannot work normally.

[0005] Most of the existing underground hole reaming is large equipment, which cannot meet the application requirements of the power transmission tower. Therefore, a large variable diameter reaming device for deep hole 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, 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 large variable diameter reaming device for deep hole with simple structure, which solves the problems of high cost, complex structure, the need for heavy equipment, low reaming efficiency and other problems of the prior art. Especially when the hole is deep, it is difficult to achieve ideal reaming effect.

[0007] In order to solve the above problems, the technical scheme of the present application is adopted to realize:

[0008] A large variable diameter reaming device for deep hole, comprising a hole fixing system, a reaming depth feeding system, a reaming cutter platform, a reaming cutter system, a depth displacement sensor and a diameter displacement sensor.

[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, so when the hydraulic cylinder extends, the four small connecting rods act respectively to the obliquely downward, then the four small connecting rods push the four large plane support plates to act respectively to the outside, so that the four large plane support plates are attached to the inner wall of the hole, the device is fixed in the hole at a certain position, and the device remains in a stable state.

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

[0011] Preferably, the hole expansion cutter platform comprises upper and lower plane plates, a cutter extension electric cylinder, a cutter sliding sleeve and a cutter sliding sleeve guide rail, the cutter extension electric cylinder is installed on the plane plate of the hole expansion cutter platform by bolts, the piston rod of the cutter extension electric cylinder is connected to the cutter sliding sleeve by bolts, the cutter sliding sleeve can act up and down with the extension and contraction of the piston rod, the two sides of the cutter sliding sleeve are provided with inclined teeth, the module and pressure angle parameters of the two cutter gears are the same as those of the teeth of the cutter sliding sleeve, so that the two cutter gears are engaged with the two sides of the cutter sliding sleeve respectively, so that the two cutter gears can rotate on the cutter sliding sleeve, the cutter sliding sleeve can act on the cutter sliding sleeve guide rail, the sliding sleeve guide rail is fixed to the lower plane plate of the hole expansion cutter platform by bolts, the cutter sliding sleeve is connected to the cutter sliding sleeve guide rail by a key, and the cutter sliding sleeve guide rail can assist the cutter sliding sleeve to slide.

[0012] Preferably, the hole expansion cutter system comprises two hole expansion spiral cutters and two cutter gears, the hole expansion spiral cutter comprises a cutting edge I and a cutting edge II, the hole expansion spiral cutter is fixed to the cutter gear by bolts, so that the hole expansion spiral cutter can retract inwardly when the cutter gear rotates inwardly, and the hole expansion spiral cutter can expand outwardly when the cutter gear rotates outwardly, the cutting edge I of the hole expansion spiral cutter is mainly responsible for cutting the two sides of the hole, and the cutting edge II of the hole expansion spiral cutter is mainly responsible for cutting the lower side of the hole, so that the whole cutting action is completed smoothly.

[0013] The depth displacement sensor is fixed on the lower flat plate of the reaming cutter platform through bolts, the probe of the depth displacement sensor contacts the upper flat plate of the rotary motor, and therefore the distance information that the hydraulic oil cylinder extends downward can be monitored in real time by the depth displacement sensor, so that the reaming depth information can be clearly understood.

[0014] The diameter displacement sensor is fixed on the upper flat plate of the reaming cutter platform through bolts, the probe of the diameter displacement sensor contacts the initial position of the piston rod of the cutter extending electric cylinder, and therefore the axial distance information of the piston rod of the cutter extending electric cylinder monitored in real time by the diameter displacement sensor can be proportionally monitored to the diameter information of the reaming, so that the reaming effect can be better understood.

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

[0016] The extension and retraction of the reaming cutter rely on the extension and retraction of the cutter extending electric cylinder, the action is fast and reliable, and the reaming efficiency is high.

[0017] The hole fixing system is driven by the hydraulic oil cylinder, is stable in support, and therefore the reaming precision of the cutter is high.

[0018] The structure and shape of the reaming cutter can be replaced and then installed in the device, so that multi-situation cutting reaming can be realized.

[0019] Compared with the prior art, the present application has the beneficial technical effects of:

[0020] (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.

[0021] (2) The large-diameter reaming device for deep holes designed in the present application adopts an electric cylinder (or a hydraulic oil cylinder) to change the diameter, can meet the requirements of reaming of different sizes, can adapt to various complex environments, and improves the reaming cutting efficiency.

[0022] (3) The device is simple to operate, saves labor, and can realize large-diameter reaming cutting. DETAILED DESCRIPTION

[0023] Figure 1 is a schematic view of the large-diameter reaming device of the present application.

[0024] Figure 2 is a structural view of the reaming cutter platform of the present application.

[0025] Figure 3 is a structural view of the cutter system of the present application.

[0026] Figure 4 is an expanded structural view of the cutter system of the present application.

[0027] Figure 5Is the invention of the tool system closed structure diagram.

[0028] Figure 6 Is the invention of the hole fixation system structure diagram.

[0029] Figure 7 Is the invention of the feed hydraulic cylinder structure diagram.

[0030] Figure 8 Is the invention of the hole fixation hydraulic cylinder and feed hydraulic cylinder working structure diagram.

[0031] Figure 9 Is the invention of the rotary motor platform structure diagram.

[0032] Figure 10 Is the invention of the extension tool electric cylinder structure diagram.

[0033] Figure 11 Is the invention of the depth displacement sensor structure diagram.

[0034] Figure 12 Is the invention of the diameter displacement sensor structure diagram.

[0035] The meaning of each label in the figure is: 1-hole fixation system, 2-feed hydraulic cylinder, 3-rotary motor platform, 4-brush, 5-reaming tool platform, 6-reaming tool system, 7-depth displacement sensor, 8-diameter displacement sensor;

[0036] 101-hole fixation system upper plane plate, 102-hole fixation hydraulic cylinder, 103-platform connecting column, 104-piston rod, 105-large connecting rod shaft, 106-small connecting rod shaft, 107-hole fixation system lower plane plate, 108-oil inlet one, 109-oil inlet two, 1010-connection hard rod, 1011-cross slide, 1012-small connecting rod, 1013-large plane support plate;

[0037] 201-oil inlet A, 202-feed hydraulic cylinder body, 203-oil inlet B, 204-feed hydraulic cylinder piston rod;

[0038] 301-rotary motor upper plane plate, 302-rotary motor, 303-platform connecting column, 304-rotary motor lower plane plate, 305-fixed platform, 306-rotary motor shaft;

[0039] 4-brush;

[0040] 501-reaming tool platform upper plane plate, 502-extension tool electric cylinder, 503-extension tool electric cylinder piston rod, 504-tool sliding sleeve, 505-tool sliding sleeve slot, 506-plane connecting column, 507-tool sliding sleeve guide rail, 508-reaming tool platform lower plane plate;

[0041] 601 - tool gear, 602 - reaming screw tool, 603 - cutting edge one, 604 - cutting edge two;

[0042] 701 - depth displacement sensor connection port, 702 - depth displacement sensor measurement probe;

[0043] 801 - diameter displacement sensor connection port, 802 - diameter displacement sensor measurement probe. Specific implementation method

[0044] The specific content of the present application is further explained in detail below in combination with the drawings and examples. The implementation range of the present application is not limited to this. Any equivalent transformation made on the basis of the technical solutions of the present application falls within the protection scope of the present application.

[0045] As Figures 1 to 12 The overall result diagram and part structure diagram of the present application are shown in the figure. The present example is a large-diameter reaming device for deep hole, which is used to realize high-efficiency large-diameter reaming cutting. The device mainly includes hole fixing system 1, feeding hydraulic cylinder 2, rotary motor platform 3, brush 4, reaming tool platform 5, reaming tool system 6, depth displacement sensor 7, and diameter displacement sensor 8.

[0046] The hole fixing system 1 includes hole fixing system 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, hole fixing system lower plane plate 107, cross slider 108, support cylinder oil inlet two 109, connecting hard rod 1010, cross slider 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 8, the operation of the reversing valve 1014 can realize the extension and retraction of the piston rod 104 of the hole fixing hydraulic cylinder 102, 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 fixing hydraulic cylinder, and the B port is connected with the rod cavity of the hole fixing hydraulic cylinder. When the reversing valve 1014 is located at the right position, the P port of the reversing valve 1014 is in communication with the A port, and the T port is in communication with the B port. When the hydraulic pump supplies oil, the piston rod 104 of the hole fixing hydraulic cylinder 102 extends downward. When the reversing valve 1014 is located at the left position, the P port of the reversing valve is in communication with the B port, and the T port is in communication with the A port. When the hydraulic pump supplies oil, the piston rod 104 of the hole fixing hydraulic cylinder 102 retracts upward. If the oil pressure of the entire 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 of the hole fixing system and the lower plane plate 107 of the hole fixing system are connected through the platform connecting column 103. The cross slider 1011 is connected with the piston rod 104 of the hole fixing hydraulic cylinder through bolts, so that the cross slider 1011 can move up and down with the piston rod 104 of the hole fixing hydraulic cylinder. 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 moves, the small connecting rod 1012 rotates around the small connecting rod shaft 106. The large plane support plate 1013 is connected with the small connecting rod 1012 through the large connecting rod shaft 105, so that it can extend outward with the movement of the small connecting rod.

[0047] The feeding hydraulic cylinder 2 includes an oil inlet A201, a feeding hydraulic cylinder body 202, an oil inlet B203, and a feeding hydraulic cylinder piston rod 204. The feeding hydraulic cylinder piston rod 204 is connected with the lower rotary motor platform 3 through bolts. The feeding hydraulic cylinder 2 is a double-acting single-piston rod hydraulic cylinder. The oil inlet A201 and the oil inlet B203 are respectively connected with the deep hole external oil pipe. The working principle is as follows Figure 8, the operation of the reversing valve 205 can realize the switching of the oil circuit, the 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, and 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 of the reversing valve 205 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 204 of the feeding hydraulic cylinder 2 extends downward, when the reversing valve 205 is located at the left position, the P port 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 204 of the feeding hydraulic cylinder 2 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 feeding hydraulic cylinder oil inlet A201 is connected with the oil, the piston rod 204 of the feeding hydraulic cylinder 2 extends stably, the oil returns to the oil tank through the feeding hydraulic cylinder oil port B203, the lower part of the whole device is pushed to extend downward, and the hole-expanding spiral tool 602 cuts and expands the hole gradually until the hole-expanding depth reaches the predetermined depth. When the predetermined depth is reached, the reversing valve is located at the left position, the oil supply to the oil inlet A201 is stopped, the oil supply to the oil inlet B203 is supplied, the piston rod 204 of the feeding hydraulic cylinder retracts upward, the feeding hydraulic cylinder 2 returns to the oil tank through the oil inlet A201, and the piston rod 204 of the feeding hydraulic cylinder retracts completely, and the whole device returns to the original position.

[0048] 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 through bolts. The rotating motor upper plane plate and the rotating motor lower plane plate are connected through the rotating motor platform connecting column 303. The brush 4 is fixed on the rotating motor upper plane plate 301 through bolts, so as to provide power supply for the feeding hydraulic cylinder 502 of the hole-expanding tool platform 5. The fixed platform 305 is connected with the rotating motor shaft 306 through bolts. The rotating motor shaft 307 is connected with the hole-expanding tool platform 5 through bolts, so that the hole-expanding tool platform 5 rotates around the fixed platform 305 together with the hole-expanding tool system 6. The rotating motor platform 3, the hole-expanding tool platform 5, and the hole-expanding tool system 6 move with the extension and retraction of the feeding hydraulic cylinder 2.

[0049] The reaming cutter platform 5 includes a reaming cutter platform upper flat plate 501, an extension cutter electric cylinder 502, an extension cutter electric cylinder piston rod 503, a cutter sliding sleeve 504, a cutter sliding sleeve groove 505, a flat connecting column 506, a cutter sliding sleeve guide rail 507, and a reaming cutter platform lower flat plate 508, the extension cutter electric cylinder 502 is bolted on the reaming cutter platform upper flat plate 501, the extension cutter electric cylinder piston rod 503 is connected with the cutter sliding sleeve 504 through bolts, the flat connecting column 506 is fixed on the cutter sliding sleeve guide rail 507 through bolts, the flat connecting column 506 is in interference fit with the cutter sliding sleeve groove 505 through keys, so that the cutter sliding sleeve 504 can move along the cutter sliding sleeve guide rail 507 with the extension and retraction of the extension cutter electric cylinder piston rod 503, the cutter sliding sleeve guide rail 507 plays a role in auxiliary supporting the cutter sliding sleeve 504, both cutter gears 601 can realize rotary motion on the cutter sliding sleeve 504, and the reaming cutter platform upper flat plate 501 is connected with the reaming cutter platform lower flat plate 508 through the flat connecting column 506.

[0050] The reaming cutter system 6 includes two cutter gears 601 and two reaming spiral cutters 602, the reaming spiral cutter 602 includes a cutting edge one 603 and a cutting edge two 604, the reaming spiral cutter 602 is fixed on the cutter gear 601 through welding or bolts, the cutting edge one 603 of the reaming spiral cutter 602 is mainly responsible for the lower side cutting action of the hole, the cutting edge two 604 of the reaming spiral cutter 602 is mainly responsible for the two side cutting actions of the hole, so that the whole cutting action is smoothly completed, when the extension cutter electric cylinder piston rod 503 extends downward or retracts upward, the reaming spiral cutter 602 of the reaming cutter system 6 will be respectively opened outward or retracted inward.

[0051] The depth displacement sensor 7 is fixed on the hole fixing system lower flat plate 107 of the hole fixing system 1 through bolts, one end 701 of the depth displacement sensor 7 is connected with a wire, the other end 702 is connected with the rotary motor upper flat plate 301, so that the distance information of the downward extension of the feed hydraulic cylinder can be monitored in real time by the depth displacement sensor 7, so that the reaming depth information can be clearly understood.

[0052] The diameter displacement sensor 8 is fixed on the reaming cutter platform upper flat plate 501 through bolts, one end 801 of the diameter displacement sensor 8 is connected with a wire, the other end 802 is connected with the initial position of the extension cutter electric cylinder piston rod 503, so that the axial distance information of the extension cutter electric cylinder piston rod 503 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.

[0053] When the device of the present application is used,

[0054] First step, use the drill to drill a hole, the hole depth should be deeper than the required depth, in order to make the reaming cutting soil fall down, use external device through the connection hard rod 1010 to put the device into the predetermined position which needs to be reamed in the already drilled deep hole;

[0055] Second step, the oil inlet two 109 of the hole fixed hydraulic cylinder 102 is connected with the oil, the oil pressure is calculated according to G = 4 μPA, where 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 hole fixed hydraulic cylinder piston rod 104 is stretched out under the push of high pressure oil, the cross slide 1011 is stretched out, the four small connecting rods 1012 are pushed to move obliquely downward, the four large plane support plates 1013 are pushed to stretch out and expand, when the hole fixed hydraulic cylinder piston rod 104 reaches the limit position, it will stop moving, at this time, the four large plane support plates 1013 form a complete plane ring, which is tightly attached to the inner wall of the hole, and can bear a large load, the whole device is fixed at a certain position, the high pressure oil needs to be continuously connected with the hole fixed hydraulic cylinder 102 through the oil inlet two 109, and the oil is returned to the oil tank through the oil inlet two 108;

[0056] Third step, start the rotary motor 302, make the reaming cutter platform 5 and the reaming cutter system 6 rotate around the fixed platform 305, further, continuously connect the oil inlet A201 of the feeding hydraulic cylinder 2 with oil, the feeding hydraulic cylinder piston rod 204 will steadily stretch out, start the cutter extension electric cylinder 502, the cutter extension electric cylinder piston rod 503 will stretch out, the piston rod 503 will push the cutter sliding sleeve 504 to move downward along the plane connecting column 506, the cutter gear 601 will rotate outward from top to bottom, the reaming spiral cutter 602 will open, close the cutter extension electric cylinder 502, at this time, the reaming spiral cutter 602 will rotate and cut, the reaming diameter will gradually increase, the reaming diameter can be obtained through the diameter displacement sensor 8, the reaming depth will gradually feed downward with the stretching out of the feeding hydraulic cylinder piston rod 204, at this time, the reaming depth can be obtained according to the depth displacement sensor 7, the reaming cutting soil will fall into the already drilled deep hole, the reaming depth will always increase with the stretching out of the feeding hydraulic cylinder piston rod 204;

[0057] Fourthly, when the reaming depth reaches the specified requirement, activate the reverse extension electric cylinder 502, causing the piston rod 503 of the extension electric cylinder to retract upwards. The tool sleeve 504 will move upwards, and the tool gear 601 will rotate inwards from bottom to top along with the tool sleeve 504, causing the reaming spiral tool 602 to gradually retract. When the reaming spiral tool 602 is fully retracted, close the extension electric cylinder 502. At this time, the piston rod 204 of the feed hydraulic cylinder has also fully extended. Turn off the rotary motor 302, and simultaneously introduce oil into the oil inlet B203 of the feed hydraulic cylinder. The oil will return to the oil tank through the oil inlet A201, causing the entire device to move inwards as the piston rod 204 of the feed hydraulic cylinder retracts. In the above action, when the piston rod 204 of the feed hydraulic cylinder is fully retracted, the supply of oil to the feed hydraulic cylinder 2 stops. At this time, oil is introduced into the other oil inlet 108 of the fixed cylinder in the hole. The oil returns to the oil tank through the oil inlet 109. The piston rod 104 of the fixed hydraulic cylinder in the hole will gradually retract, and the cross slider 1011 will retract accordingly. The four small connecting rods 1012 will retract diagonally upward. The four large flat support plates 1013 will return to their original state as the small connecting rods 1012 retract. When the piston rod 104 of the fixed hydraulic cylinder in the hole is fully retracted, all components return to their original state. At this time, the predetermined action is completed by the retraction device of the connecting rigid rod 1010.

[0058] It should be noted that the above-described embodiments are illustrative of the technical solution of the present invention and not limiting thereof. Equivalent substitutions or other modifications made by those skilled in the art based on existing technology, as long as they do not exceed the concept and scope of the technical solution of the present invention, should be included within the rights and scope claimed by the present invention.

Claims

1. A deep hole reamer with a large diameter variable diameter, characterized in that, It includes an in-hole fixing system, a feed hydraulic cylinder, a reversing valve, a rotary motor platform, a reaming tool platform, a reaming tool system, a depth displacement sensor, and a diameter displacement sensor; The in-hole fixing system (1) includes an in-hole fixing system lower plane plate (107); The rotary motor platform (3) includes a rotary motor upper flat plate (301) and a rotary motor (302); The reaming tool platform (5) includes a top plate (501) on the reaming tool platform, a tool extension electric cylinder (502), a tool extension electric cylinder piston rod (503), a tool sleeve (504), a tool sleeve groove (505), a planar connecting column (506), a tool sleeve guide rail (507), and a bottom plate (508) on the reaming tool platform. The tool extension electric cylinder (502) is bolted to the top plate (501) on the reaming tool platform. The tool extension electric cylinder piston rod (503) is connected to the tool sleeve (504) by bolts. The tool sleeve guide rail (507) is bolted to the reaming tool. On the lower flat plate (508) of the platform, the tool sleeve guide rail (507) is press-fitted with the tool sleeve groove (505) by a key, so that the tool sleeve (504) moves up and down along the tool sleeve guide rail (507) as the piston rod (503) of the extension electric cylinder moves with the extension and retraction. The tool sleeve guide rail (507) plays the role of auxiliary support for the tool sleeve (504). Both tool gears (601) can rotate on the tool sleeve (504). The upper flat plate (501) of the reaming tool platform and the lower flat plate (508) of the reaming tool platform are connected by a flat connecting column (506). The reaming tool system (6) includes two tool gears (601) and two reaming spiral tools (602). The reaming spiral tool (602) includes a first cutting edge (603) and a second cutting edge (604). The reaming spiral tool (602) is fixed to the tool gears (601) by welding or bolting. The first cutting edge (603) and the second cutting edge (604) of the reaming spiral tool (602) together enable the entire cutting work to be completed smoothly. When the piston rod (503) of the extension electric cylinder extends downward or retracts upward, the reaming spiral tool (602) of the reaming tool system (6) will open outward or retract inward respectively. The first cutting edge (603) of the hole-reaming spiral cutter (602) is responsible for the cutting action on the lower side of the hole, and the second cutting edge (604) of the hole-reaming spiral cutter (602) is responsible for the cutting action on both sides of the hole. The deep hole reaming device with large diameter change adopts the electric cylinder (502) for diameter change; When the tool sleeve (504) moves up and down along the tool sleeve guide rail (507) as the piston rod (503) of the extension electric cylinder extends and retracts, the two tool gears (601) rotate on the tool sleeve (504); When the tool gear (601) rotates outward about the vertical rotation axis as the tool sleeve (504) moves downward, the reaming spiral tool (602) opens; When the reversing valve (205) is in the right position, when oil is introduced into the oil inlet A (201) of the feed hydraulic cylinder, the piston rod (204) of the feed hydraulic cylinder extends smoothly, and the oil returns to the oil tank through the oil inlet B (203) of the feed hydraulic cylinder, pushing the lower part to extend downward. The hole-expanding spiral cutter (602) then gradually cuts and expands the hole until the hole-expanding depth reaches the predetermined depth. The rotary motor (302) is fixed to the rotary motor platform (3) by bolts. When the rotary motor (302) is in working state, the reaming tool platform (3) rotates. The depth displacement sensor (7) is fixed to the lower plane plate (107) of the hole fixing system (1) by bolts. One end (701) of the depth displacement sensor (7) is wired, and the other end (702) contacts the upper plane plate (301) of the rotary motor. The depth displacement sensor (7) is used to monitor the distance information of the downward extension of the feed hydraulic cylinder (2). The diameter displacement sensor (8) is fixed to the flat plate (501) on the reaming tool platform by bolts. One end (801) of the diameter displacement sensor (8) is wired, and the other end (802) contacts the initial position of the piston rod (503) of the extension electric cylinder, which is used to obtain the axial distance information of the piston rod (503) of the extension electric cylinder. The deep hole reaming device with a large diameter change obtains the diameter information of the reamed hole based on the axial distance information.

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