WO2023151196A1

WO2023151196A1 - Hydraulic system and rotary drilling rig

Info

Publication number: WO2023151196A1
Application number: PCT/CN2022/091413
Authority: WO
Inventors: 马强; 董炳坤; 张翔
Original assignee: 北京三一智造科技有限公司
Priority date: 2022-02-14
Filing date: 2022-05-07
Publication date: 2023-08-17
Also published as: CN216767908U

Abstract

A hydraulic system and a rotary drilling rig. The hydraulic system comprises: a main pump (10); an auxiliary valve group (20), an inlet (21) thereof being in communication with the main pump; a winch motor (30), a working oil port (22) of the auxiliary valve group being in communication with a working oil port of the winch motor by means of a first oil path (40), so as to control forward and reverse rotation of the winch motor; a control valve group (70) provided on a first oil path so as to selectively control on/off of the winch motor and the auxiliary valve group; and a plurality of oil cylinders (50), which are arranged in parallel on a second oil path (60), the second oil path being in communication with the working oil port of the auxiliary valve group by means of the control valve group. According to the hydraulic system and the rotary drilling rig, by providing a control valve group, the number of auxiliary valve groups is reduced, and the size of the auxiliary valve group is reduced, so that the space of a chassis is increased without increasing the cost of the chassis; moreover, the hydraulic system can be suitable for both a standard rotary drilling construction method and a CFA construction method (or other construction methods), so that the hydraulic system can be compatible with different construction methods of rotary drilling rigs.

Description

Hydraulic system and rotary drilling rig

Cross References to Related Applications

This application claims the priority of the Chinese patent application with the application number 202220295434.9 and the title of the invention "a hydraulic system and rotary drilling rig" submitted to the China Patent Office on February 14, 2022, the entire contents of which are incorporated in this application by reference middle.

technical field

The present application relates to the technical field of engineering machinery, in particular to a hydraulic system and a rotary drilling rig.

Background technique

The multi-process rotary drilling rig is the main development direction of the pile driver at present. As the main control system of construction machinery, the hydraulic system needs to meet the functional requirements and fast switching requirements of the multiplex method. In the multi-function rotary drilling rig in the prior art, the hydraulic system needs to be provided with multiple auxiliary valve groups to meet the hydraulic control of different actuators. However, the chassis space of the rotary drilling rig is limited, so that the chassis cannot be applied to the standard rotary drilling method and the CFA (Continuous Flight Auger) method (the full name is the continuous drilling pile and grouting construction method of the auger drilling tool).

Contents of the invention

One of the purposes of the present application is to provide a hydraulic system to overcome the defect that the multi-function rotary drilling rig in the prior art cannot be compatible with different construction methods.

In order to solve the above problems, the application provides a hydraulic system, including: main pump; auxiliary valve group, whose inlet is connected with the main pump; hoist motor, the working oil port of the auxiliary valve group is connected to the hoist motor through the first oil circuit The working oil port is connected to control the forward and reverse rotation of the winch motor; the control valve group is set on the first oil circuit to selectively control the on-off of the winch motor and the auxiliary valve group; multiple oil cylinders, multiple oil cylinders It is arranged in parallel on the second oil circuit, and the second oil circuit communicates with the working oil port of the auxiliary valve group through the control valve group.

Optionally, the winch motor includes a first working oil port and a second working oil port, and the working oil ports of the auxiliary valve group include a third working oil port and a fourth working oil port; the first oil circuit includes the first working oil port The first branch oil circuit that communicates with the third working oil port, and the second oil branch circuit that connects the second working oil port with the fourth working oil port; the control valve group includes the first branch oil circuit connected in series with the first oil branch An on-off valve and a second on-off valve connected in series on the second branch oil circuit.

Optionally, the first on-off valve and the second on-off valve are electromagnetic on-off valves.

Optionally, the control valve group further includes: a shuttle valve, the first inlet of the shuttle valve communicates with the third working oil port, the second inlet of the shuttle valve communicates with the fourth working oil port, and the outlet of the shuttle valve communicates with the second oil passage connected.

Optionally, the hydraulic system further includes: a plurality of oil cylinder reversing valves, the second oil passage is connected to the oil inlet of each oil cylinder reversing valve, and each oil cylinder is correspondingly connected to each oil cylinder reversing valve.

Optionally, a balance valve is provided between at least one oil cylinder and its corresponding oil cylinder reversing valve.

Optionally, the auxiliary valve group is a pilot hydraulic control reversing valve group.

Optionally, the auxiliary valve group includes: an auxiliary valve body, on which an inlet and a working oil port of the auxiliary valve group are arranged; a pilot pump, which is connected to the control end of the auxiliary valve body through a pilot oil circuit; There are pilot valves and handle directional valves for directional oil supply control on the control side of the main body of the auxiliary valve.

Another object of the present application is to provide a rotary drilling rig, which overcomes the defect that the multi-work method rotary drilling rig in the prior art cannot be compatible with different construction methods.

The present application also provides a rotary drilling rig, including the above-mentioned hydraulic system.

Optionally, the main pump and the auxiliary valve group are arranged on the chassis of the rotary drilling rig.

This application has the following advantages:

With the hydraulic system of the present application, a control valve group is arranged between the first oil circuit and the second oil circuit.

When the standard rotary digging method is required, the control valve group connects the working oil port of the auxiliary valve group with the first oil circuit, so that the winch motor runs.

When the CFA method (or other methods) is required, the control valve group makes the working oil port of the auxiliary valve group communicate with the second oil circuit (or connects the outlet of the auxiliary valve group with the first oil circuit and the second oil circuit at the same time) , so that multiple oil cylinders are extended or retracted.

The hydraulic system can be applied to both the standard rotary drilling method and the CFA method (or other methods).

In the above structure, by setting the control valve group, the number of auxiliary valve groups is reduced, and the volume of the auxiliary valve group is reduced at the same time, so that the hydraulic system as a whole occupies less space.

In the above structure, since the hydraulic system occupies less space, the space of the chassis can be increased without increasing the cost of the chassis.

Therefore, the technical solution of the present application solves the defects that the chassis cost of the multifunctional rotary drilling rig in the prior art is relatively high and cannot be compatible with different construction methods.

Description of drawings

In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the specific embodiments or prior art. Obviously, the accompanying drawings in the following description The figures show some implementations of the present application, and those skilled in the art can obtain other figures based on these figures without any creative effort.

Fig. 1 shows the structural representation of the hydraulic system of the present application;

Fig. 2 shows the schematic structural view of the auxiliary valve group in Fig. 1;

FIG. 3 shows a schematic structural diagram of the control valve group of the auxiliary valve group in FIG. 1 .

Explanation of reference signs:

10. Main pump; 20. Auxiliary valve group; 201. Main body of auxiliary valve; 202. Pilot pump; 203. Pilot oil circuit; 204. Pilot valve; 205. Handle reversing valve; 21. Inlet; 22. Working oil port; 221, the third working oil port; 222, the fourth working oil port; 30, hoist motor; 31, the first working oil port; 32, the second working oil port; 40, the first oil circuit; 41, the first branch Oil circuit; 42, second branch oil circuit; 50, oil cylinder; 60, second oil circuit; 70, control valve group; 71, first on-off valve; 72, second on-off valve; 73, shuttle valve; 731 , the first inlet; 732, the second inlet; 733, the outlet; 80, the reversing valve of the oil cylinder; 90, the balance valve.

Detailed ways

The technical solutions of the present application will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are some of the embodiments of the present application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

In the description of this application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the application and simplification of the description, rather than indicating or implying that the referred device or element must have a specific orientation, use a specific orientation construction and operation, therefore should not be construed as limiting the application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and should not be construed as indicating or implying relative importance.

In the description of this application, it should be noted that unless otherwise specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary, and it may be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in this application according to specific situations.

In addition, the technical features involved in the different embodiments of the present application described below may be combined as long as they do not constitute a conflict with each other.

As shown in FIGS. 1 to 3 , the hydraulic system of the rotary drilling rig in this embodiment includes a main pump 10 , a winch motor 30 , an auxiliary valve group 20 , a plurality of oil cylinders 50 and a control valve group 70 . Wherein, the main pump 10 communicates with the inlet 21 of the auxiliary valve group 20 . The winch motor 30 communicates with the working oil port 22 of the auxiliary valve group 20 through the first oil passage 40 to control the forward and reverse rotation of the winch motor 30 . The control valve group 70 is disposed on the first oil passage 40 , and the control valve group 70 can selectively control the on-off of the winch motor 30 and the auxiliary valve group 20 . A plurality of oil cylinders 50 are arranged in parallel on the second oil passage 60 , and the second oil passage 60 communicates with the working oil port of the auxiliary valve group 20 through the control valve group 70 .

With this embodiment, a control valve group 70 is provided between the first oil passage 40 and the second oil passage 60 . When the standard rotary digging method is required, the control valve group 70 communicates the working oil port 22 of the auxiliary valve group 20 with the first oil passage 40 , so that the winch motor 30 operates. When the CFA method (or other methods) needs to be carried out, the control valve group makes the working oil port 22 of the auxiliary valve group 20 communicate with the second oil passage 60 (or makes the outlet of the auxiliary valve group 20 communicate with the first oil passage 40 and the second oil passage 40 and the second oil passage 60). The oil passages 60 are communicated at the same time), and then the multiple oil cylinders 50 are extended or retracted. In the above structure, by setting the control valve group 70, the quantity of the auxiliary valve group 20 is reduced, and the volume of the auxiliary valve group 20 is reduced, and the chassis space is increased without increasing the chassis cost. At the same time, the hydraulic system can be applied to the standard rotary drilling method and the CFA method (or other methods). Therefore, this embodiment solves the defects that the chassis cost of the multi-function rotary drilling rig in the prior art is relatively high and cannot be compatible with different construction methods.

It should be noted that, in conjunction with FIG. 2, it can be seen that the inlet 21 of the auxiliary valve group 20 refers to the oil inlet port of the auxiliary valve group 20, and the working oil port 22 of the auxiliary valve group 20 refers to the oil outlet of the auxiliary valve group 20. mouth. In this embodiment, the auxiliary valve group 20 is a three-position seven-way reversing valve. Those skilled in the art can understand that the main function of the auxiliary valve group 20 in this embodiment is to control the flow of the main oil circuit. broken. At the same time, a pipeline is arranged in the auxiliary valve group 20 to throttle the main oil circuit.

It should be noted that the hoisting motor 30 in this embodiment refers to a mechanism that drives the hoisting drum to rotate. The hoisting motor 30 is used to drive the power head and the drilling tool to rise and lower, so that the rotary drilling rig can perform standard rotary drilling methods.

It should be noted that the oil cylinder 50 in this embodiment refers to an oil cylinder provided to drive an additional actuator provided in the CFA method. For example, the CFA method includes a CFA power head, and the oil cylinder 50 can drive the CFA power head to pressurize. Those skilled in the art can select the specific number of oil cylinders 50 according to the components set in the CFA method.

Of course, the above-mentioned oil cylinder 50 is not limited to driving the actuators in the CFA method, the oil cylinder 50 can drive the actuators in other methods, or the oil cylinder 50 can also drive the actuators in the standard rotary drilling method.

As shown in FIG. 1 and FIG. 3 , in this embodiment, the second oil passage 60 is connected to the first oil passage 40 , the control valve group 70 includes an on-off valve, and the on-off valve is arranged on the first oil passage 40 . And the on-off valve is located between the winch motor 30 and the connecting point of the first oil passage 40 and the second oil passage 60 .

Specifically, one end of the second oil passage 60 is connected to the first oil passage 40 , and the other end communicates with the oil cylinder 50 . That is, after the hydraulic oil flowing out from the working oil port 22 of the auxiliary valve group 20 flows to the connection point of the first oil circuit 40 and the second oil circuit 60, it can continue to flow into the first oil circuit 40 or flow into the second oil circuit. Road 60.

Optionally, the on-off valve in this embodiment is a two-position two-way reversing valve. Those skilled in the art can understand with reference to FIG. 3 that when the on-off valve is switched between two positions, the first oil passage 40 can be turned on or off. When the first oil passage 40 is turned on, hydraulic oil can flow from the first oil passage 40 into the winch motor 30 . When the first oil passage 40 is cut off, hydraulic oil cannot flow from the first oil passage 40 into the hoist motor 30 .

As shown in FIGS. 1 to 3 , in this embodiment, the winch motor 30 includes a first working oil port 31 and a second working oil port 32 , and the working oil port 22 of the auxiliary valve group 20 includes a third working oil port 221 And the fourth working oil port 222. The above-mentioned first oil passage 40 includes a first oil distribution passage 41 connecting the first working oil port 31 with the third working oil port 221 , and a second oil branch passage 41 connecting the second working oil port 32 with the fourth working oil port 222 . Oil distribution circuit 42. Optionally, the control valve group 70 includes a first on-off valve 71 connected in series to the first oil distribution passage 41 and a second on-off valve 72 connected in series to the second oil distribution passage 42 .

As shown in Fig. 1 and Fig. 3, in this embodiment, the winch motor 30 is a hydraulic motor, and the first oil passage 40 is two arranged in parallel, that is, the first oil distribution passage 41 and the second oil distribution passage 42 . The control valve group 70 also includes a shuttle valve 73, the first inlet 731 and the second inlet 732 of the shuttle valve 73 are respectively connected to the first oil distribution circuit 41 and the second oil distribution circuit 42, and the outlet of the shuttle valve 73 is connected to the second oil circuit. 60 connections.

Optionally, the first inlet 731 of the shuttle valve 73 communicates with the third working oil port 221 , and the second inlet 732 of the shuttle valve 73 communicates with the fourth working oil port 222 .

Specifically, the hydraulic motor has two oil inlets, so correspondingly, there are two first oil passages 40 , that is, a first oil distribution passage 41 and a second oil distribution passage 42 . When hydraulic oil is fed into the first oil distribution passage 41 , the hydraulic motor can be controlled to rotate forward (or reversely), so that the reel of the hoisting mechanism rotates forwardly (or reversely). When the hydraulic oil is fed into the second oil distribution passage 42, the hydraulic motor can be controlled to reverse (or forward) and then the reel of the hoisting mechanism is reversed (or forward).

Optionally, as shown in FIG. 2 , the third working oil port 221 and the fourth working oil port 222 of the auxiliary valve group 20 are respectively connected to the first oil distribution passage 41 and the second oil distribution passage 42 . Those skilled in the art can understand with reference to FIG. 2 that when the spool of the auxiliary valve group 20 is at the left position, the hydraulic oil flows into the first oil distribution passage 41; when the spool of the auxiliary valve group 20 is at the right position, the hydraulic oil It flows into the second oil distribution passage 42 .

Optionally, as shown in FIG. 3 , the shuttle valve 73 has two inlets and one outlet, and its function is to selectively connect the two inlets with the outlet. Therefore, no matter which first oil passage 40 the hydraulic oil flows in from, it can flow into the second oil passage 60 from the shuttle valve 73 .

As shown in Figure 3, in this embodiment, the hydraulic system also includes a plurality of oil cylinder reversing valves 80, the second oil circuit 60 is connected to the oil inlet of each oil cylinder reversing valve 80, and each oil cylinder 50 is reversing with each oil cylinder. Valve 80 is correspondingly connected. Specifically, the multiple oil cylinder reversing valves 80 are adapted to control the actions (extend or retract) of the multiple oil cylinders 50 .

Specifically, seven oil cylinders 50 are provided in this embodiment, and oil cylinder reversing valves are 80-position six-way on-off valves. Two of the oil cylinders 50 are connected in parallel and then connected with a one-way off-valve, thereby realizing the action of one six-way off-valve controlling seven oil cylinders.

Those skilled in the art can understand with reference to FIG. 1 , that each connecting and breaking spool is a three-position, four-way reversing valve. When the spool is in the neutral position, the second oil passage 60 and the oil cylinder 50 are blocked, and when the spool is in the upper or lower position respectively, the push rod of the oil cylinder 50 stretches out or retracts.

As shown in FIG. 1 , in this embodiment, a balance valve 90 is provided between at least one oil cylinder 50 and its corresponding oil cylinder reversing valve 80 . The balance valve 90 is suitable for controlling the pressure of the hydraulic oil entering the oil cylinder 50, so as to make the movement of the oil cylinder 50 more stable.

As shown in FIG. 1 and FIG. 2 , in this embodiment, the auxiliary valve group 20 includes an auxiliary valve main body 201 , and the auxiliary valve main body 201 includes the aforementioned inlet 21 and working oil port 22 . The auxiliary valve group 20 also includes a pilot pump 202 , and the pilot pump 202 is connected to the control end of the auxiliary valve main body 201 through a pilot oil passage 203 . Specifically, the auxiliary valve main body 201 is a hydraulic control reversing valve. The pilot pump 202 is adapted to provide pilot pressure for the reversing of the auxiliary valve body 201 . Optionally, the hydraulic system further includes a pilot valve 204 and a handle reversing valve 205 , and the pilot valve 204 and the handle reversing valve 205 are arranged on the pilot oil circuit 203 .

This embodiment also provides a rotary drilling rig, including the above-mentioned hydraulic system. Optionally, the main pump 10 and the auxiliary valve group 20 are arranged on the chassis of the rotary drilling rig. Meanwhile, the pilot pump 202, the pilot valve 204 and the handle reversing valve 205 are all arranged on the chassis of the rotary drilling rig. Optionally, the auxiliary valve group 20 includes an auxiliary valve main body 201, a pilot pump 202, a pilot oil circuit 203, a pilot valve 204 and a handle reversing valve 205, all of which are arranged on the chassis of the rotary drilling rig. The above arrangement can ensure the versatility of the chassis and the convenience of operating mode switching, and can control the cost. The rotary drilling rig in this example can realize the installation of standard rotary drilling operation (i.e. utilizing power head and drilling tool to carry out drilling operation) and long spiral CFA operation (i.e. continuous drilling pile and grouting construction method of auger drilling tool), so Some of the above-mentioned hydraulic motors and oil cylinders are used in the standard rotary excavation mode, some are used in the CFA mode, and some are used in both operation modes. Due to the versatility of the chassis of the rotary drilling rig, users can choose to require two operation modes or one operation mode. It can be seen from Fig. 1 that a group of spools on the auxiliary valve group 20 cooperate with the control valve group 70 and the oil cylinder reversing valve 80 to achieve the effect of controlling the action of one motor and seven oil cylinders.

According to the above description, the technical solution of this patent application has the following advantages:

1. Through the reasonable selection and layout of the hydraulic system, a chassis hydraulic system is provided to ensure that the chassis hydraulic system is applicable to both the standard rotary digging method and the CFA method. When the hydraulic system adapts to different construction methods, the number of auxiliary valve groups is not increased, the number of hydraulic components is small, and the space occupied is small, so the chassis cost is not increased;

2. Based on the chassis hydraulic system above, a hydraulic control system suitable for multi-process rotary drilling rigs has been developed;

3. Make full use of the ability of the auxiliary valve group, through the integration of oil cylinders and motors that operate at different times, and through the use of electromagnetic on-off valves and on-off valves, a control system in which one auxiliary valve group spool controls one motor and seven oil cylinders is realized to meet the Requirements for the construction and use of multi-process rotary drilling rigs;

4. Reduce the cost of the auxiliary valve group, reduce the volume of the auxiliary valve group and increase the chassis space.

Apparently, the above-mentioned embodiments are only examples for clear description, rather than limiting the implementation. For those of ordinary skill in the art, other changes or changes in different forms can be made on the basis of the above description. It is not necessary and impossible to exhaustively list all the implementation manners here. However, the obvious changes or changes derived therefrom are still within the scope of protection of the present application.

Claims

A hydraulic system, characterized in that it comprises:

main pump (10);

Auxiliary valve group (20), the inlet (21) of which communicates with the main pump (10);

The hoist motor (30), the working oil port (22) of the auxiliary valve group (20) communicates with the working oil port of the hoist motor (30) through the first oil passage (40), so as to be able to control the Hoist motor (30) forward and reverse;

A control valve group (70), arranged on the first oil passage (40), to selectively control the on-off of the winch motor (30) and the auxiliary valve group (20);

A plurality of oil cylinders (50), the plurality of oil cylinders (50) are arranged in parallel on the second oil passage (60), and the second oil passage (60) passes through the control valve group (70) and the auxiliary valve The working oil ports (22) of the group (20) are connected.
The hydraulic system according to claim 1, characterized in that, the winch motor (30) includes a first working oil port (31) and a second working oil port (32), and the auxiliary valve group (20) Working oil port (22) comprises the 3rd working oil port (221) and the 4th working oil port (222);

The first oil passage (40) includes a first oil branch passage (41) connecting the first working oil port (31) with the third working oil port (221), and connecting the second working oil port The oil port (32) communicates with the second oil branch circuit (42) of the fourth working oil port (222);

The control valve group (70) includes a first on-off valve (71) connected in series to the first oil distribution circuit (41) and a second on-off valve (71) connected in series to the second oil distribution circuit (42). On-off valve (72).
The hydraulic system according to claim 2, characterized in that, the first on-off valve (71) and the second on-off valve (72) are electromagnetic on-off valves.
The hydraulic system according to claim 2, characterized in that, the control valve group (70) further comprises:

A shuttle valve (73), the first inlet (731) of the shuttle valve (73) communicates with the third working oil port (221), the second inlet (732) of the shuttle valve (73) communicates with the The fourth working oil port (222) communicates, and the outlet (733) of the shuttle valve (73) communicates with the second oil passage (60).
The hydraulic system according to any one of claims 1 to 4, further comprising:

A plurality of oil cylinder reversing valves (80), the second oil circuit (60) is connected to the oil inlet of each of the oil cylinder reversing valves (80), and each of the oil cylinders (50) is reversing with each of the oil cylinders Valve (80) is connected accordingly.
The hydraulic system according to claim 5, characterized in that a balance valve (90) is provided between at least one of the oil cylinders (50) and the oil cylinder reversing valve (80) corresponding thereto.
The hydraulic system according to any one of claims 1 to 4, characterized in that the auxiliary valve group (20) is a pilot hydraulic control reversing valve group.
The hydraulic system according to claim 7, characterized in that, the auxiliary valve group (20) comprises:

An auxiliary valve main body (201), on which the inlet (21) and the working oil port (22) of the auxiliary valve group (20) are arranged;

A pilot pump (202), which is connected to the control end of the auxiliary valve main body (201) through a pilot oil circuit (203);

Wherein, the pilot oil passage (203) is provided with a pilot valve (204) and a handle reversing valve (205) for controlling the reversing oil supply to the control end of the auxiliary valve body (201).
A rotary drilling rig, characterized in that it comprises the hydraulic system according to any one of claims 1 to 8.
The rotary drilling rig according to claim 9, characterized in that, the main pump (10) and the auxiliary valve group (20) are arranged on the chassis of the rotary drilling rig.