Power system for swinging type casing drilling machine and swinging type casing drilling machine

Abstract

A power system comprises two main pumps, two pile grinding oil cylinders and two lifting oil cylinders. Wherein the first main pump is communicated with the first pile grinding oil cylinder through a first pile grinding control valve and is also communicated with the first lifting oil cylinder through a first lifting control valve; the second main pump is communicated with a second pile grinding oil cylinder through a second pile grinding control valve and is also communicated with a second lifting oil cylinder through a second lifting control valve; an oil inlet path between the first pile grinding control valve and the first pile grinding oil cylinder is communicated with an oil return path between the second pile grinding control valve and the second pile grinding oil cylinder, and an oil return path between the first pile grinding control valve and the first pile grinding oil cylinder is communicated with an oil inlet path between the second pile grinding control valve and the second pile grinding oil cylinder; an oil inlet path between the first lifting control valve and the first lifting oil cylinder is communicated with an oil inlet path between the second lifting control valve and the second lifting oil cylinder, and an oil return path between the first lifting control valve and the first lifting oil cylinder is communicated with an oil return path between the second lifting control valve and the second lifting oil cylinder.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of engineering machinery, in particular to a power system for a swing casing drill rig and a swing casing drill rig using the same. BACKGROUND

[0002] The swing casing drill rig is a commonly used pile foundation construction equipment, which works by pressing a sleeve into the ground, then discharging the soil and rock inside the sleeve, then grouting into the sleeve to form a pile body, and finally pulling the sleeve up to leave the pile body.

[0003] The swing casing drill rig usually uses a cylinder power system to realize the above operations. The power system of most swing casing drill rigs includes at least two clamping cylinders, at least two pile grinding cylinders, and at least two lifting cylinders. When working, the sleeve is positioned by the two clamping cylinders, then the sleeve is repeatedly rotated by the two pile grinding cylinders, and the sleeve is pressed down by the lifting cylinders, so that the sleeve is gradually pressed into the ground. After the pile body is formed, the sleeve is pulled out by the lifting cylinders.

[0004] In the above power system, since the number of each type of cylinder is at least two, at least two main pumps are usually used as power sources, and at least two control valve groups are correspondingly used to control the oil supply of the cylinders by the main pumps. For example Figure 1 As shown in the figure, a power system of an existing swing casing drill rig includes a first clamping cylinder A1, a second clamping cylinder A2, a first pile grinding cylinder B1, a second pile grinding cylinder B2, a first lifting cylinder C1, a second lifting cylinder C2, a first main pump P1, a second main pump P2, and six control valves V1-V6 corresponding to the above six cylinders respectively; wherein the control valves V1-V3 constitute a first control valve group J1, the first main pump P1 is in fluid communication with the first clamping cylinder A1, the first pile grinding cylinder B1, and the first lifting cylinder C1 through the control valves V1-V3 respectively, the control valves V4-V6 constitute a second control valve group J2, and the second main pump P2 is in fluid communication with the second clamping cylinder A2, the second pile grinding cylinder B2, and the second lifting cylinder C2 through the control valves V4-V6 respectively. In order to facilitate the return of hydraulic oil, the above six control valves V1-V6 usually adopt Y-type valves.

[0005] Figure 1When the power system is in operation, the control valves V1 and V4 control the first and second main pumps P1 and P2 to provide hydraulic oil to the first and second clamping oil cylinders A1 and A2, respectively, to drive the first and second clamping oil cylinders A1 and A2 to clamp a sleeve (not shown in the figure). The first and second pile grinding oil cylinders B1 and B2 are in transmission connection with the sleeve, and the extension and retraction directions of the first and second pile grinding oil cylinders B1 and B2 are perpendicular to the axial direction of the sleeve and tangent to the side surface of the sleeve. When the pile grinding operation is performed, the control valves V2 and V5 control the first and second main pumps P1 and P2 to provide hydraulic oil to the first and second pile grinding oil cylinders B1 and B2, respectively, and by adjusting the flow directions of the control valves V2 and V5, the flow directions of the hydraulic oil in the first and second pile grinding oil cylinders B1 and B2 are opposite to each other, so that the first and second pile grinding oil cylinders B1 and B2 move in opposite directions, and then the sleeve is twisted by being rubbed from left and right. The first and second lifting oil cylinders C1 and C2 are in transmission connection with the sleeve, and the extension and retraction directions of the first and second lifting oil cylinders C1 and C2 are parallel to the axial direction of the sleeve. When the lifting operation is performed, the control valves V3 and V6 control the first and second main pumps P1 and P2 to provide hydraulic oil to the first and second lifting oil cylinders C1 and C2, respectively, and by adjusting the flow directions of the control valves V3 and V6, the flow directions of the hydraulic oil in the first and second lifting oil cylinders C1 and C2 are the same, so that the first and second lifting oil cylinders C1 and C2 move in the same direction, and then the sleeve is driven to be pressed down or lifted. Based on the above principle, the necessary functions of the swing type casing drilling rig can be realized.

[0006] In practical applications, Figure 1 The power system also has obvious defects. For example, because the working pressure required for the pile grinding operation is usually smaller than the working pressure required for the lifting operation, when each main pump is used to supply oil to the pile grinding oil cylinder and the lifting oil cylinder in fluid communication therewith, the hydraulic oil will all flow into the pile grinding oil cylinder due to the pressure difference, and cannot be supplied to the lifting oil cylinder. That is, the power system can only alternately use the pile grinding oil cylinder and the lifting oil cylinder to perform the pile grinding operation and the lifting operation, and cannot simultaneously use the pile grinding oil cylinder and the lifting oil cylinder to perform the pile grinding operation and the lifting operation, respectively, which obviously reduces the work efficiency. If the pressure difference between the working pressures required for the pile grinding operation and the lifting operation is to be eliminated, complex control of the opening degree of the control valve is required, which is difficult to implement and is not conducive to accurately matching the pile grinding speed and the lifting speed.

[0007] In some other existing power systems of swing type casing drilling rigs, one control valve group is used to specially control the pile grinding operation, and another control valve group is used to specially control the lifting operation, that is, in the pile grinding operation, the control valve group for the pile grinding operation is used, and in the lifting operation, the control valve group for the lifting operation is used. Figure 1The second pile driving oil cylinder B2 and the corresponding control valve V4 of the power system shown are moved to the first control valve group J1, and the first main pump P1 is in fluid communication with the second pile driving oil cylinder B2 through the control valve V4; the first lifting oil cylinder C1 and the corresponding control valve V3 are moved to the second control valve group J2, and the second main pump P2 is in fluid communication with the first lifting oil cylinder C1 through the control valve V3; the rest is the same as the power system shown in Figure 1 Such a design eliminates the use of the same main pump to supply oil to the pile driving oil cylinder and the lifting oil cylinder at the same time, and the pressure difference problem shown in Figure 1 The power system shown above does not occur, but its defect is that only one main pump can be used for pile driving or lifting operation, that is, only one main pump is used as the power source, which is half of the power of the power system shown in Figure 1

[0008] Therefore, it is necessary to provide a more novel power system for a swing-type casing drilling rig to solve the above technical problems. SUMMARY

[0009] Based on the above problems in the prior art, the purpose of the present application is to provide a power system for a swing-type casing drilling rig and a swing-type casing drilling rig to improve work efficiency and power, and facilitate the adaptability of pile driving speed and lifting speed.

[0010] An embodiment of one aspect of the present application provides a power system for a swing-type casing drilling rig, comprising a first main pump, a second main pump, a first pile driving control valve, a second pile driving control valve, a first lifting control valve, a second lifting control valve, a first pile driving oil cylinder and a second pile driving oil cylinder for driving the rotation of the sleeve of the swing-type casing drilling rig, and a first lifting oil cylinder and a second lifting oil cylinder for driving the lifting of the sleeve of the swing-type casing drilling rig; the first main pump is in fluid communication with the first pile driving oil cylinder through the first pile driving control valve, and is also in fluid communication with the first lifting oil cylinder through the first lifting control valve; the second main pump is in fluid communication with the second pile driving oil cylinder through the second pile driving control valve, and is also in fluid communication with the second lifting oil cylinder through the second lifting control valve; a first oil inlet oil passage between the first pile driving control valve and the first pile driving oil cylinder is in fluid communication with a second oil return oil passage between the second pile driving control valve and the second pile driving oil cylinder, a first oil return oil passage between the first pile driving control valve and the first pile driving oil cylinder is in fluid communication with a second oil inlet oil passage between the second pile driving control valve and the second pile driving oil cylinder; a third oil inlet oil passage between the first lifting control valve and the first lifting oil cylinder is in fluid communication with a fourth oil inlet oil passage between the second lifting control valve and the second lifting oil cylinder, and a third oil return oil passage between the first lifting control valve and the first lifting oil cylinder is in fluid communication with a fourth oil return oil passage between the second lifting control valve and the second lifting oil cylinder.​

[0011] In an embodiment, the power system further comprises a first clamp control valve, a second clamp control valve, a first clamp cylinder for fixing the position of the sleeve, and a second clamp cylinder, the first main pump is in fluid communication with the first clamp cylinder through the first clamp control valve, and the second main pump is in fluid communication with the second clamp cylinder through the second clamp control valve.

[0012] In an embodiment, the power system further comprises a sub-pump and an adjusting cylinder, the sub-pump is in fluid communication with the adjusting cylinder and the first main pump in sequence.

[0013] In an embodiment, the first pile driving control valve and the second lifting control valve are Y-type valves, and the second pile driving control valve and the first lifting control valve are O-type valves.

[0014] In an embodiment, the power system has a preset first single-function state, a second single-function state, and a double-function state; in the first single-function state, the first pile driving control valve and the second pile driving control valve are opened, and the first lifting control valve and the second lifting control valve are closed, so as to control the power system to drive only the rotation of the sleeve; in the second single-function state, the first pile driving control valve and the second pile driving control valve are closed, and the first lifting control valve and the second lifting control valve are opened, so as to control the power system to drive only the lifting of the sleeve; in the double-function state, the first pile driving control valve and the second lifting control valve are opened, and the second pile driving control valve and the first lifting control valve are closed, so as to control the power system to drive the rotation and the lifting of the sleeve at the same time.

[0015] Another aspect of the preferred embodiment of the present application provides a swing type casing drilling machine, comprising a sleeve and the power system provided by the foregoing embodiment, the first pile driving cylinder and the second pile driving cylinder are in driving connection with the sleeve, and the first lifting cylinder and the second lifting cylinder are in driving connection with the sleeve.

[0016] In an embodiment, the extension and retraction directions of the first pile driving cylinder and the second pile driving cylinder are perpendicular to the axial direction of the sleeve and tangent to the side surface of the sleeve.

[0017] In an embodiment, the extension and retraction directions of the first lifting cylinder and the second lifting cylinder are parallel to the axial direction of the sleeve.

[0018] In an embodiment, the swivel casing drill rig further comprises a first clamping control valve, a second clamping control valve, a first clamping oil cylinder, a second clamping oil cylinder, a base, and a clamping seat arranged on the base, the sleeve is sequentially arranged in the clamping seat and the base, the first clamping oil cylinder is arranged in the clamping seat and used for fixing and positioning the sleeve, the second clamping oil cylinder is arranged in the base and used for fixing and positioning the sleeve, the first main pump is in fluid communication with the first clamping oil cylinder through the first clamping control valve, and the second main pump is in fluid communication with the second clamping oil cylinder through the second clamping control valve.

[0019] In an embodiment, the first pile grinding oil cylinder and the second pile grinding oil cylinder are arranged on the base and in transmission connection with the side of the clamping seat, and the first lifting oil cylinder and the second lifting oil cylinder are arranged on the base and in transmission connection with the bottom of the clamping seat.

[0020] Compared with the prior art, the power system provided by the above-mentioned embodiments of the present application is in fluid communication between the first oil inlet oil way and the second oil return oil way, in fluid communication between the first oil return oil way and the second oil inlet oil way, in fluid communication between the third oil inlet oil way and the fourth oil inlet oil way, and in fluid communication between the third oil return oil way and the fourth oil return oil way, so that the pile grinding operation and the lifting operation can be simultaneously performed, which not only improves the overall work efficiency and power, is beneficial to the adaptability of the pile grinding speed and the lifting speed, and improves the operation convenience.

[0021] Compared with the prior art, the swivel casing drill rig provided by the above-mentioned embodiments of the present application improves the work efficiency and the operation convenience through the power system provided by the above-mentioned embodiments, can drive the sleeve to simultaneously rotate and lift, and is beneficial to the adaptability of the pile grinding speed and the lifting speed. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0023] Figure 1 is a structural schematic diagram of a prior power system for a swivel casing drill rig.

[0024] Figure 2 is a structural schematic diagram of a power system for a swivel casing drill rig provided by a preferred embodiment of the present application.

[0025] Figure 3 is a structural side view schematic diagram of a swivel casing drill rig provided by a preferred embodiment of the present application.

[0026] Figure 4 is a preferred embodiment of the present application, which is a structure top view of a swing type casing drive. DETAILED DESCRIPTION

[0027] The specific embodiments of the present application will be described in detail hereinafter with reference to the drawings. It should be pointed out that the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the description of the present application, all the other embodiments obtained by those skilled in the art without any creative work under the premise that the scope of protection of the present application.

[0028] In the description of the present application, unless otherwise explicitly specified and limited, the terms "arrange", "mount", "connect" and the like should be understood in a broad sense, for example, can be fixedly connected, or can be detachably connected, or integrally connected; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium. For those skilled in the art, the specific meanings of the above terms can be understood according to the specific circumstances.

[0029] The terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product of the present application is usually placed, and are only for the convenience of description and simplification of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0030] The terms "first", "second", "third" and the like are only for distinguishing similar attributes of elements, and do not indicate or imply relative importance or a particular order.

[0031] The terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, in addition to including the listed elements, other elements not explicitly listed can also be included.

[0032] Please refer to Figure 2A preferred embodiment of the present application provides a power system for a swing casing drill rig, comprising a first main pump 1, a second main pump 2, a first pile driving control valve 3, a second pile driving control valve 4, a first lifting control valve 5, a second lifting control valve 6, a first pile driving cylinder 8 and a second pile driving cylinder 9 for driving a sleeve 7 of the swing casing drill rig to rotate, a first lifting cylinder 10 and a second lifting cylinder 11 for driving the sleeve 7 of the swing casing drill rig to lift; the first main pump 1 is in fluid communication with the first pile driving cylinder 8 through the first pile driving control valve 3, and is also in fluid communication with the first lifting cylinder 10 through the first lifting control valve 5; the second main pump 2 is in fluid communication with the second pile driving cylinder 9 through the second pile driving control valve 4, and is also in fluid communication with the second lifting cylinder 11 through the second lifting control valve 6; a first oil inlet oil way 12 between the first pile driving control valve 3 and the first pile driving cylinder 8 is in fluid communication with a second oil return oil way 15 between the second pile driving control valve 4 and the second pile driving cylinder 9, a first oil return oil way 13 between the first pile driving control valve 3 and the first pile driving cylinder 8 is in fluid communication with a second oil inlet oil way 14 between the second pile driving control valve 4 and the second pile driving cylinder 9; a third oil inlet oil way 16 between the first lifting control valve 5 and the first lifting cylinder 10 is in fluid communication with a fourth oil inlet oil way 18 between the second lifting control valve 6 and the second lifting cylinder 11, a third oil return oil way 17 between the first lifting control valve 5 and the first lifting cylinder 10 is in fluid communication with a fourth oil return oil way 19 between the second lifting control valve 6 and the second lifting cylinder 11.

[0033] When the pile grinding operation and the lifting operation are simultaneously performed, the first pile grinding control valve 3 is opened, the second pile grinding control valve 4 is closed, the first pile grinding control valve 3 controls the first main pump 1 to provide hydraulic oil to the first pile grinding oil cylinder 8, because the first pile grinding control valve 3 and the first pile grinding oil cylinder 8 are in fluid communication through the first oil inlet oil way 12, the second pile grinding control valve 4 and the second pile grinding oil cylinder 9 are in fluid communication through the second oil return oil way 15, the first pile grinding control valve 3 and the first pile grinding oil cylinder 8 are in fluid communication through the first oil return oil way 13, the second pile grinding control valve 4 and the second pile grinding oil cylinder 9 are in fluid communication through the second oil inlet oil way 14, so that the first pile grinding control valve 3 controls the first main pump 1 to provide hydraulic oil to the second pile grinding oil cylinder 9, the flow direction of the hydraulic oil is adjusted through the first pile grinding control valve 3, so that the flow directions of the hydraulic oil in the first pile grinding oil cylinder 8 and the second pile grinding oil cylinder 9 are opposite, thereby the first pile grinding oil cylinder 8 and the second pile grinding oil cylinder 9 move reversely, and then the sleeve 7 is twisted to rotate; the first lifting control valve 5 is closed, the second lifting control valve is opened, the second lifting control valve controls the second main pump P2 to provide hydraulic oil to the second lifting oil cylinder 11, because the first lifting control valve 5 and the first lifting oil cylinder 10 are in fluid communication through the third oil inlet oil way 16, the second lifting control valve 6 and the second lifting oil cylinder 11 are in fluid communication through the fourth oil inlet oil way 18, the first lifting control valve 5 and the first lifting oil cylinder 10 are in fluid communication through the third oil return oil way 17, the second lifting control valve 6 and the second lifting oil cylinder 11 are in fluid communication through the fourth oil return oil way 19, so that the second lifting control valve 6 controls the second main pump P2 to provide hydraulic oil to the first lifting oil cylinder 10, the flow direction of the hydraulic oil is adjusted through the second lifting control valve 6, so that the flow directions of the hydraulic oil in the first lifting oil cylinder 10 and the second lifting oil cylinder 11 are same, thereby the first lifting oil cylinder 10 and the second lifting oil cylinder 11 move in the same direction, and then the sleeve 7 is driven to press down or lift. By closing the second pile grinding control valve 4 and closing the first lifting control valve 5, there is no hydraulic oil pressure difference in the pile grinding operation and the lifting operation, so that the pile grinding operation and the lifting operation can be simultaneously performed.

[0034] By controlling the first pile grinding control valve 3, the second pile grinding control valve 4, the first lifting control valve 5 and the second lifting control valve 6, the pile grinding operation and the lifting operation can be simultaneously performed, which not only improves the overall work efficiency and power, is beneficial to the adaptability of the pile grinding speed and the lifting speed, but also improves the operation convenience.

[0035] In an embodiment, the power system further comprises a first clamping control valve 20, a second clamping control valve 21, a first clamping oil cylinder 22 and a second clamping oil cylinder 23 for fixing and positioning the sleeve 7, the first main pump 1 is in fluid communication with the first clamping oil cylinder 22 through the first clamping control valve 20, and the second main pump 2 is in fluid communication with the second clamping oil cylinder 23 through the second clamping control valve 21.

[0036] As Figure 2As shown, the first clamping control valve 20 and the second clamping control valve 21 respectively control the first main pump 1 and the second main pump 2 to provide hydraulic oil to drive the first clamping cylinder 22 and the second clamping cylinder 23 to clamp the sleeve 7. By providing the first clamping cylinder 22 and the second clamping cylinder 23, when switching between clamping by the first clamping cylinder 22 and clamping by the second clamping cylinder 23, it is ensured that both are clamped at the same time and then released, eliminating the situation of simultaneous release. This effectively prevents the casing from falling when pulling out the casing after drilling, thereby improving construction safety.

[0037] like Figure 2 As shown, in one embodiment, the power system further includes an auxiliary pump 24 and a regulating cylinder 25. The auxiliary pump 24 is in fluid communication with the regulating cylinder 25 and the first main pump 1. The auxiliary pump 24 and the regulating cylinder 25 provide a buffering and auxiliary power transmission function for the power system, thereby improving the overall stability of the power system.

[0038] In one embodiment, the first pile grinding control valve 3 and the second lifting control valve 6 are Y-type valves, and the second pile grinding control valve 4 and the first lifting control valve 5 are O-type valves.

[0039] In one embodiment, the power system has a preset first single-function state, a second single-function state, and a dual-function state. In the first single-function state, the first and second pile grinding control valves 3 and 4 are open, and the first and second lift control valves 5 and 6 are closed, so that the power system only drives the sleeve 7 to rotate. In the second single-function state, the first and second pile grinding control valves 3 and 4 are closed, and the first and second lift control valves 5 and 6 are open, so that the power system only drives the sleeve 7 to rise and fall. In the dual-function state, the first and second lift control valves 3 and 6 are open, and the second and first lift control valves 4 and 5 are closed, so that the power system simultaneously drives the sleeve 7 to rotate and rise. This helps meet the needs of use under various working conditions and improves overall adaptability.

[0040] The working principle of the power system provided in this application is as follows:

[0041] When the power system is working, the first clamping control valve 20 and the second clamping control valve 21 respectively control the first main pump 1 and the second main pump 2 to provide hydraulic oil to drive the first clamping cylinder 22 and the second clamping cylinder 23 to clamp the sleeve 7.

[0042] In the first single-function state, the first and second pile grinding control valves 3 and 4 are opened, the first and second lifting control valves 5 and 6 are closed, the first and second pile grinding control valves 3 and 4 control the first and second main pumps 1 and P2 to provide hydraulic oil to the first and second pile grinding oil cylinders 8 and 9 respectively, the flow direction of the hydraulic oil is adjusted by the first and second pile grinding control valves 3 and 4, the flow directions of the hydraulic oil in the first and second pile grinding oil cylinders 8 and 9 are opposite, the first and second pile grinding oil cylinders 8 and 9 move in opposite directions, the sleeve 7 is twisted to rotate, and the flow of the first and second main pumps 1 and P2 is fully utilized in the pile grinding operation, thereby improving the work efficiency.

[0043] In the second single-function state, the first and second pile grinding control valves 3 and 4 are closed, the first and second lifting control valves 5 and 6 are opened, the first and second lifting control valves 5 and 6 control the first and second main pumps 1 and P2 to provide hydraulic oil to the first and second lifting oil cylinders 10 and 11 respectively, the flow direction of the hydraulic oil is adjusted by the first and second lifting control valves 5 and 6, the flow directions of the hydraulic oil in the first and second lifting oil cylinders 10 and 11 are the same, the first and second lifting oil cylinders 10 and 11 move in the same direction, the sleeve 7 is driven to be pressed down or lifted, and the flow of the first and second main pumps 1 and P2 is fully utilized in the lifting operation, thereby improving the work efficiency.

[0044] In the double-function state, the first pile grinding control valve 3 and the second lifting control valve 6 are opened, the second pile grinding control valve 4 and the first lifting control valve 5 are closed, the first pile grinding control valve 3 controls the first main pump 1 to provide hydraulic oil to the first pile grinding oil cylinder 8, the first oil inlet oil way 12 is in fluid communication with the second oil return oil way 15, the first oil return oil way 13 is in fluid communication with the second oil inlet oil way 14, so that the first pile grinding control valve 3 controls the first main pump 1 to provide hydraulic oil to the second pile grinding oil cylinder 9, the flow direction of the hydraulic oil is adjusted by the first pile grinding control valve 3, the flow directions of the hydraulic oil in the first and second pile grinding oil cylinders 8 and 9 are opposite, the first and second pile grinding oil cylinders 8 and 9 move in opposite directions, the sleeve 7 is twisted to rotate; the second lifting control valve controls the second main pump P2 to provide hydraulic oil to the second lifting oil cylinder 11, the third oil inlet oil way 16 is in fluid communication with the fourth oil inlet oil way 18, the third oil return oil way 17 is in fluid communication with the fourth oil return oil way 19, so that the second lifting control valve 6 controls the second main pump P2 to provide hydraulic oil to the first lifting oil cylinder 10, the flow direction of the hydraulic oil is adjusted by the second lifting control valve 6, the flow directions of the hydraulic oil in the first and second lifting oil cylinders 10 and 11 are the same, the first and second lifting oil cylinders 10 and 11 move in the same direction, and the sleeve 7 is driven to be pressed down or lifted.

[0045] Please refer to Figures 3-4Another embodiment of the present application provides a swinging casing drilling rig, including a sleeve 7 and the power system provided in the aforementioned embodiment, the first pile grinding cylinder 8 and the second pile grinding cylinder 9 are transmission-connected to the sleeve 7, and the first lifting cylinder 10 and the second lifting cylinder 11 are transmission-connected to the sleeve 7.

[0046] The swing casing drilling rig provided in the present application improves work efficiency and operational convenience through the power system provided by the aforementioned embodiment, and can drive the sleeve to rotate and lift at the same time, which is beneficial to the adaptability of the pile drilling speed and the lifting speed.

[0047] In one embodiment, the extension and retraction directions of the first and second pile grinding cylinders 8 and 9 are perpendicular to the axial direction of the sleeve 7 and tangent to the side surfaces of the sleeve 7. This is beneficial to ensure the smooth progress of the pile grinding operation and improve the overall stability.

[0048] In one embodiment, the extension and retraction directions of the first lifting cylinder 10 and the second lifting cylinder 11 are parallel to the axial direction of the sleeve 7. This is beneficial to ensure the smooth progress of the lifting operation and improve the overall stability.

[0049] like Figure 3 As shown, in one embodiment, the swing casing drilling rig also includes a first clamping control valve 20, a second clamping control valve 21, a first clamping cylinder 22, a second clamping cylinder 23, a base 200, and a clamping seat 100 arranged on the base 200, the sleeve 7 is sequentially passed through the clamping seat 100 and the base 200, the first clamping cylinder 22 is arranged in the clamping seat 100 and is used to fix the sleeve 7 in position, the second clamping cylinder 23 is arranged in the base 200 and is used to fix the sleeve 7 in position, the first main pump 1 is fluidically connected to the first clamping cylinder 22 through the first clamping control valve 20, and the second main pump 2 is fluidically connected to the second clamping cylinder 23 through the second clamping control valve 21.

[0050] like Figure 3 As shown, in one embodiment, the first and second grinding cylinders 8 and 9 are disposed on the base 200 and are in transmission connection with the side surfaces of the clamping base 100, while the first and second lifting cylinders 10 and 11 are disposed on the base 200 and are in transmission connection with the bottom of the clamping base 100. This facilitates driving the clamping base 100 to rotate and lift, thereby driving the sleeve 7 to rotate and lift, avoiding damage caused by directly driving the sleeve 7 and improving its service life.

[0051] The working principle of the swing casing drilling rig provided in this application is as follows:

[0052] When the swing casing drill rig works, the first clamping control valve 20 and the second clamping control valve 21 control the first main pump 1 and the second main pump 2 to provide hydraulic oil respectively to drive the first clamping oil cylinder 22 in the clamp seat 100 and the second clamping oil cylinder 23 in the base 200 to clamp the sleeve 7. The first pile grinding oil cylinder 8 and the second pile grinding oil cylinder 9 are arranged on the base 200 and are in transmission connection with the side of the clamp seat 100, the extension and retraction directions of the first pile grinding oil cylinder 8 and the second pile grinding oil cylinder 9 are perpendicular to the axial direction of the sleeve 7 and are tangent to the side of the sleeve 7, and the first lifting oil cylinder 10 and the second lifting oil cylinder 11 are arranged on the base 200 and are in transmission connection with the bottom of the clamp seat 100, the extension and retraction directions of the first lifting oil cylinder 10 and the second lifting oil cylinder 11 are parallel to the axial direction of the sleeve 7.

[0053] In the first single-function state, the first pile grinding control valve 3 and the second pile grinding control valve 4 are opened, the first lifting control valve 5 and the second lifting control valve 6 are closed, the first pile grinding control valve 3 and the second pile grinding control valve 4 control the first main pump 1 and the second main pump P2 to provide hydraulic oil to the first pile grinding oil cylinder 8 and the second pile grinding oil cylinder 9 respectively, the flow direction of the hydraulic oil is adjusted through the first pile grinding control valve 3 and the second pile grinding control valve 4, the flow directions of the hydraulic oil in the first pile grinding oil cylinder 8 and the second pile grinding oil cylinder 9 are opposite, so that the first pile grinding oil cylinder 8 and the second pile grinding oil cylinder 9 move reversely, and then the clamp seat 100 is rubbed to rotate, the sleeve 7 is rotated with the clamp seat 100 due to being clamped, and the flow of the first main pump 1 and the second main pump P2 is fully utilized in the pile grinding operation, and the work efficiency is improved.

[0054] In the second single-function state, the first pile grinding control valve 3 and the second pile grinding control valve 4 are closed, the first lifting control valve 5 and the second lifting control valve 6 are opened, the first lifting control valve 5 and the second lifting control valve 6 control the first main pump 1 and the second main pump P2 to provide hydraulic oil to the first lifting oil cylinder 10 and the second lifting oil cylinder 11 respectively, the flow direction of the hydraulic oil is adjusted through the first lifting control valve 5 and the second lifting control valve 6, the flow directions of the hydraulic oil in the first lifting oil cylinder 10 and the second lifting oil cylinder 11 are the same, so that the first lifting oil cylinder 10 and the second lifting oil cylinder 11 move in the same direction, and then the clamp seat 100 is driven to press down or lift, so as to drive the sleeve 7 to press down or lift, the flow of the first main pump 1 and the second main pump P2 is fully utilized in the lifting operation, and the work efficiency is improved.

[0055] In the dual-function state, the first grinding control valve 3 and the second lifting control valve 6 are opened, the second grinding control valve 4 and the first lifting control valve 5 are closed, the first grinding control valve 3 controls the first main pump 1 to provide hydraulic oil to the first grinding oil cylinder 8, because the first oil inlet oil way 12 is in fluid communication with the second oil return oil way 15, and the first oil return oil way 13 is in fluid communication with the second oil inlet oil way 14, so that the first grinding control valve 3 controls the first main pump 1 to provide hydraulic oil to the second grinding oil cylinder 9, and the flow direction of the hydraulic oil is adjusted through the first grinding control valve 3, so that the flow directions of the hydraulic oil in the first grinding oil cylinder 8 and the second grinding oil cylinder 9 are opposite, thereby making the first grinding oil cylinder 8 and the second grinding oil cylinder 9 move reversely, and further making the clamp seat 100 rotate to make the sleeve 7 rotate; the second lifting control valve controls the second main pump P2 to provide hydraulic oil to the second lifting oil cylinder 11, because the third oil inlet oil way 16 is in fluid communication with the fourth oil inlet oil way 18, and the third oil return oil way 17 is in fluid communication with the fourth oil return oil way 19, so that the second lifting control valve 6 controls the second main pump P2 to provide hydraulic oil to the first lifting oil cylinder 10, and the flow direction of the hydraulic oil is adjusted through the second lifting control valve 6, so that the flow directions of the hydraulic oil in the first lifting oil cylinder 10 and the second lifting oil cylinder 11 are same, thereby making the first lifting oil cylinder 10 and the second lifting oil cylinder 11 move in the same direction, and further driving the clamp seat 100 to press down or lift, thereby driving the sleeve 7 to press down or lift.

[0056] The above merely illustrates the specific implementation of the present application, but the protection scope of the present application is not limited to this. Any changes or replacements within the technical range disclosed by the present application can be easily thought by those skilled in the art, and should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A power system for a swing casing drilling rig, characterized in that: The invention comprises a first main pump (1), a second main pump (2), a first pile grinding control valve (3), a second pile grinding control valve (4), a first lifting control valve (5), a second lifting control valve (6), a first pile grinding cylinder (8) and a second pile grinding cylinder (9) for driving the sleeve (7) of the swing-type casing drilling rig to rotate, and a first lifting cylinder (10) and a second lifting cylinder (11) for driving the sleeve (7) of the swing-type casing drilling rig to lift and lower; the first main pump (1) is in fluid communication with the first pile grinding cylinder (8) through the first pile grinding control valve (3), and is also in fluid communication with the first lifting cylinder (10) through the first lifting control valve (5); the second main pump (2) is in fluid communication with the second pile grinding cylinder (9) through the second pile grinding control valve (4), and is also in fluid communication with the second lifting cylinder (11) through the second lifting control valve (6); the first pile grinding control valve (3) is in fluid communication with the first pile grinding cylinder (8) and is also in fluid communication with the first lifting cylinder (10) through the first lifting control valve (5); The first oil inlet circuit (12) between the first pile grinding cylinder (8) is fluidically connected to the second oil return circuit (15) between the second pile grinding control valve (4) and the second pile grinding cylinder (9); the first oil return circuit (13) between the first pile grinding control valve (3) and the first pile grinding cylinder (8) is fluidically connected to the second oil inlet circuit (14) between the second pile grinding control valve (4) and the second pile grinding cylinder (9); the third oil inlet circuit (16) between the first lift control valve (5) and the first lift cylinder (10) is fluidically connected to the fourth oil inlet circuit (18) between the second lift control valve (6) and the second lift cylinder (11); the third oil return circuit (17) between the first lift control valve (5) and the first lift cylinder (10) is fluidically connected to the fourth oil return circuit (19) between the second lift control valve (6) and the second lift cylinder (11).

2. The power system according to claim 1, wherein: The power system further includes a first clamping control valve (20), a second clamping control valve (21), a first clamping cylinder (22) and a second clamping cylinder (23) for fixing the sleeve (7) in position, the first main pump (1) is fluidically connected to the first clamping cylinder (22) through the first clamping control valve (20), and the second main pump (2) is fluidically connected to the second clamping cylinder (23) through the second clamping control valve (21).

3. The power system according to claim 1, wherein: The power system further comprises an auxiliary pump (24) and a regulating oil cylinder (25), wherein the auxiliary pump (24) is fluidically connected to the regulating oil cylinder (25) and the first main pump (1) in sequence.

4. The power system according to claim 1, wherein: The first pile grinding control valve (3) and the second lifting control valve (6) are Y-type valves, and the second pile grinding control valve (4) and the first lifting control valve (5) are O-type valves.

5. The power system according to claim 4, characterized in that: The power system has a preset first single-function state, a second single-function state, and a dual-function state; in the first single-function state, the first pile grinding control valve (3) and the second pile grinding control valve (4) are opened, and the first lifting control valve (5) and the second lifting control valve (6) are closed, so as to control the power system to only drive the sleeve (7) to rotate; in the second single-function state, the first pile grinding control valve (3) and the second pile grinding control valve (4) are closed, and the first lifting control valve (5) and the second lifting control valve (6) are opened, so as to control the power system to only drive the sleeve (7) to rise and fall; in the dual-function state, the first pile grinding control valve (3) and the second lifting control valve (6) are opened, and the second pile grinding control valve (4) and the first lifting control valve (5) are closed, so as to control the power system to simultaneously drive the sleeve (7) to rotate and rise and fall.

6. A swing casing drilling rig, characterized in that: The invention comprises a sleeve (7) and a power system according to any one of claims 1 to 5, wherein the first pile grinding cylinder (8) and the second pile grinding cylinder (9) are transmission-connected to the sleeve (7), and the first lifting cylinder (10) and the second lifting cylinder (11) are transmission-connected to the sleeve (7).

7. The swing casing drilling rig according to claim 6, wherein: The telescopic directions of the first pile grinding cylinder (8) and the second pile grinding cylinder (9) are perpendicular to the axial direction of the sleeve (7) and are tangent to the side surface of the sleeve (7).

8. The swing casing drilling rig according to claim 6, wherein: The telescopic directions of the first lifting oil cylinder (10) and the second lifting oil cylinder (11) are parallel to the axial direction of the sleeve (7).

9. The swing casing drilling rig according to claim 6, wherein: The swing casing drilling rig further comprises a first clamping control valve (20), a second clamping control valve (21), a first clamping oil cylinder (22), a second clamping oil cylinder (23), a base (200), and a clamping seat (100) arranged on the base (200); the sleeve (7) is sequentially passed through the clamping seat (100) and the base (200); the first clamping oil cylinder (22) is arranged in the clamping seat (100) and is used to fix the sleeve (7) in position; the second clamping oil cylinder (23) is arranged in the base (200) and is used to fix the sleeve (7) in position; the first main pump (1) is fluidically connected to the first clamping oil cylinder (22) through the first clamping control valve (20); and the second main pump (2) is fluidically connected to the second clamping oil cylinder (23) through the second clamping control valve (21).

10. The swing casing drilling rig according to claim 9, wherein: The first pile grinding cylinder (8) and the second pile grinding cylinder (9) are arranged on the base (200) and are transmission-connected to the side of the clamping seat (100); the first lifting cylinder (10) and the second lifting cylinder (11) are arranged on the base (200) and are transmission-connected to the bottom of the clamping seat (100).

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