A hybrid power system for rotary drilling rig and rotary drilling rig

Abstract

This invention discloses a hybrid power system for a rotary drilling rig and a rotary drilling rig in the field of rotary drilling rig technology. The system includes a battery module and a plug-in module, a power generation module, an electric drive module, a hydraulic drive module, and a vehicle power module, all connected to the battery module. The plug-in module and the power generation module are used to charge the battery module when its power is insufficient. The electric drive module is used to obtain electrical energy from the battery module to drive the main winch or to convert the mechanical energy of the main winch during lowering into electrical energy and store it in the battery module. The hydraulic drive module is used to obtain electrical energy from the battery module to drive the main pump in the hydraulic system of the whole machine. The main pump is used to drive the power head motor and the walking device. The vehicle power module is used to obtain electrical energy from the battery module to power the electronic heat dissipation device and the vehicle power supply. The various modules of the system are installed independently. It has the characteristics of flexible and simple structural layout, high reliability, and low emissions.

Description

Technical Field

[0001] The invention belongs to the technical field of rotary drilling rigs, and in particular relates to a rotary drilling rig hybrid power system and a rotary drilling rig. Background Art

[0002] The rotary drilling rig is a type of engineering machinery for pile construction. With its outstanding performance in the construction of various large-scale pile foundations, it has been increasingly widely used. As a continuously operating construction equipment, the continuous high-emission working conditions of the rotary drilling rig urgently need to be improved. The main working mechanisms of the rotary drilling rig include the power head, main winch, travel, rotation, pressurization, auxiliary winch, etc. Among them, the power head and main winch are the working mechanisms with the longest continuous working time, and the working time can account for more than 80% of the entire working time of the rotary drilling rig. At the same time, they are also the working mechanisms with the largest output power, the highest fuel consumption, and the highest working performance requirements. In the prior art, the hybrid rotary drilling rig has high emissions, complex structure, and unreasonable layout, resulting in poor flexibility and stability of the rotary drilling rig. Summary of the invention

[0003] In order to solve the deficiencies in the prior art, the present invention provides a rotary drilling rig hybrid power system and a rotary drilling rig, which have the characteristics of flexible and simple structural arrangement, high reliability, low emission, etc.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is:

[0005] In a first aspect, a hybrid power system for a rotary drilling rig is provided, comprising: a battery module; a plug-in module and a power generation module are respectively connected to the battery module, and are used to charge the battery module when the battery module is low on power; an electric drive module is connected to the battery module, and is used to obtain electric energy from the battery module to drive a main winch or convert the mechanical energy when the main winch is lowered into electric energy and store it in the battery module; a hydraulic drive module is connected to the battery module, and is used to obtain electric energy from the battery module to drive a main pump in the hydraulic system of the whole machine, and the main pump is used to drive a power head motor and a walking device; a vehicle power module is connected to the battery module, and is used to obtain electric energy from the battery module to power an electronic heat dissipation device and a vehicle power supply; the plug-in module, the power generation module, the electric drive module, the hydraulic drive module and the vehicle power module are independent of each other.

[0006] Furthermore, the power generation module includes an engine and a generator driven by the engine, and the electric energy generated by the generator is stored in the battery module via a rectifier.

[0007] Furthermore, the electric drive module includes a first motor, the first motor is electrically connected to the battery module through a first inverter, and the first motor is transmission-connected to the main winch.

[0008] Furthermore, the hydraulic drive module includes a second motor, the second motor is electrically connected to the battery module via a second inverter, and the second motor is transmission-connected to the main pump.

[0009] Furthermore, the vehicle power module includes a DC module, an electronic heat dissipation device and a vehicle power supply, and the electronic heat dissipation device and the vehicle power supply are electrically connected to the battery module through the DC module respectively.

[0010] Furthermore, it also includes a control module, which is respectively connected to the battery module, the power generation module, the electric drive module, the hydraulic drive module, and the vehicle power module, and is used for signal transmission and control between various modules of the whole machine; wherein the battery module sends battery power and battery temperature signals to the control module; wherein the control module sends control instructions to the power generation module, and when it is in the power generation condition, it is used to control the engine speed and generator current in the power generation module, so that the engine maintains working in the optimal fuel working area; at the same time, the power generation module feeds back the engine speed, engine fuel consumption, generator current, and generator temperature signals to the control module; wherein the control module sends control instructions to the electric drive module, and when it is in the main winch lifting condition, it is used to control the speed of the first motor in the electric drive module. , current signal, to realize the lifting action of the main winch; when in the main winch lowering condition, the main winch reversely drags the first motor to generate electricity under the action of load, and stores the electric energy in the battery module, and the control module is used to control the speed and current signal of the first motor to prevent the main winch from stalling and falling; at the same time, the electric drive module feeds back the operating parameters of the electric drive module to the control module; wherein, the control module sends a control instruction to the hydraulic drive module to control the speed and current signal of the second motor in the hydraulic drive module, so as to provide a power input that matches the power demand of the hydraulic system; at the same time, the hydraulic drive module feeds back the operating parameters of the hydraulic drive module to the control module; wherein, the control module sends a control instruction to the vehicle power module to control the working state of electrical components on the vehicle including the electronic heat dissipation device.

[0011] Furthermore, the operating parameters of the electric drive module include rotation speed, current, temperature and main winch speed signal; the operating parameters of the hydraulic drive module include rotation speed, current, temperature and main pump pressure signal.

[0012] Furthermore, the first motor and the second motor are both permanent magnet synchronous motors.

[0013] Furthermore, the power input of the whole vehicle is provided by any one or a combination of two of the battery module, the plug-in module and the power generation module.

[0014] In a second aspect, a rotary drilling rig is provided, wherein the rotary drilling rig is equipped with a rotary drilling rig hybrid power system as described in the first aspect.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] (1) The present invention is characterized in that the plug-in module, the power generation module, the electric drive module, the hydraulic drive module and the vehicle power module are independently installed. The plug-in module and the power generation module are respectively connected to the battery module to charge the battery module when the battery module is low on power; the electric drive module is connected to the battery module to obtain electric energy from the battery module to drive the main winch or convert the mechanical energy when the main winch is lowered into electric energy and store it in the battery module; the hydraulic drive module is connected to the battery module to obtain electric energy from the battery module to drive the main pump in the hydraulic system of the whole machine, and the main pump is used to drive the power head motor and the walking device; the vehicle power module is connected to the battery module to obtain electric energy from the battery module to power the electronic heat dissipation device and the vehicle power supply; compared with the traditional engine drive, this system uses electric energy to replace part of the fuel, and has the characteristics of flexible and simple structure layout, high reliability, low emissions, etc.

[0017] (2) Compared with pure electric direct drive, the system of the present invention has a power generation function to prevent the crawler from being unable to move and unable to reach the destination when the battery power is insufficient;

[0018] (3) Compared with the electric drive head, the power head device of the present invention is driven by a hydraulic motor, which can achieve rapid start-stop reversal, making the impact of the drill bit when it stops rotating left and right more powerful, which is more conducive to the power head to throw away the soil. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The present invention provides a system structure block diagram of a rotary drilling rig hybrid power system. DETAILED DESCRIPTION

[0020] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0021] Embodiment 1:

[0022] like Figure 1As shown, a hybrid power system of a rotary drilling rig includes: a battery module; a plug-in module and a power generation module are respectively connected to the battery module, and are used to charge the battery module when the battery module is low on power; an electric drive module is connected to the battery module, and is used to obtain electric energy from the battery module to drive the main winch or convert the mechanical energy when the main winch is lowered into electric energy and store it in the battery module; a hydraulic drive module is connected to the battery module, and is used to obtain electric energy from the battery module to drive the main pump in the hydraulic system of the whole machine, and the main pump is used to drive the power head motor and the walking device; a vehicle power module is connected to the battery module, and is used to obtain electric energy from the battery module to power the electronic heat dissipation device and the vehicle power supply; the plug-in module, the power generation module, the electric drive module, the hydraulic drive module and the vehicle power module are independent of each other.

[0023] The power generation module includes an engine, a generator, and a rectifier. The engine is mechanically connected to the generator, and the generator is electrically connected to the rectifier.

[0024] The electric drive module includes an inverter 1 (first inverter), a motor 1 (first motor), and a main hoisting device. The inverter 1 is electrically connected to the motor 1, and the motor 1 is mechanically connected to the main hoisting device.

[0025] Among them, the hydraulic drive module includes an inverter 2 (a second inverter), a motor 2 (a second motor), a main pump, a power head device, a traveling device and other working devices. The inverter 2 is electrically connected to the motor 2, the motor 2 is mechanically connected to the main pump, and the main pump is hydraulically connected to the power head device, the traveling device and other working devices.

[0026] Among them, the vehicle power module includes a DC module, an electronic heat dissipation device, and a vehicle power supply, and the DC module is electrically connected to the electronic heat dissipation device and the vehicle power supply respectively.

[0027] Each module of the system is installed independently.

[0028] The vehicle power input can be provided by any one or a combination of battery module, plug-in module and power generation module. When the battery power is sufficient, the vehicle is powered by the battery; when the battery power is insufficient, the engine can generate electricity or an external power supply can be used for charging; when the main winch is lowered, the main winch reverses and pulls the motor 1 to generate electricity, storing the electricity in the battery module.

[0029] The power output of the whole vehicle is provided by motor 1 and motor 2, wherein motor 1 is used to drive the main winch; motor 2 is used to drive the hydraulic system of the whole machine, especially to drive the power head motor.

[0030] The generator, motor 1 and motor 2 are all permanent magnet synchronous motors, which have the advantages of small size and light weight.

[0031] The system also includes: a control module, which is respectively connected to the battery module, the power generation module, the electric drive module, the hydraulic drive module, and the vehicle power module, and is used for signal transmission and control between the various modules of the whole machine.

[0032] Among them, the battery module sends signals such as battery power and battery temperature to the control module;

[0033] The control module sends control instructions to the power generation module. When in power generation mode, it is used to control the engine speed, generator current, etc., so that the engine can operate in the optimal fuel working area. At the same time, the power generation module feeds back signals such as engine speed, engine fuel consumption, generator current, and generator temperature to the control module.

[0034] Among them, the control module sends control instructions to the electric drive module. When in the main winch lifting condition, it is used to control the speed, current and other signals of the motor 1 to realize the main winch lifting action; when in the main winch lowering condition, under the action of negative load, the main winch reversely drags the motor 1 to generate electricity and stores the electric energy in the battery module. The control module is used to control the speed, current and other signals of the motor 1 to prevent the main winch from stalling and falling. At the same time, the electric drive module feeds back the speed, current, temperature, main winch speed and other signals of the motor 1 to the control module.

[0035] The control module sends control instructions to the hydraulic drive module to control the speed, current and other signals of the motor 2, thereby providing power input that matches the power requirements of the hydraulic system. At the same time, the hydraulic drive module feeds back the speed, current, temperature, main pump pressure and other signals of the motor 2 to the control module.

[0036] Among them, the control module sends control instructions to the vehicle power module to control the working status of electrical components such as electronic heat dissipation devices on the vehicle.

[0037] Compared with traditional engine drive, this system uses electricity to replace part of the fuel, and the overall emission of the machine is low; compared with pure electric direct drive, this system has the function of power generation to prevent the crawler from being unable to move and reach the destination when the battery is insufficient; compared with the electric drive power head, the power head device is driven by a hydraulic motor, which can achieve fast start-stop switching, making the impact of the drill bit when it rotates left and right and pauses more powerful, which is more conducive to the power head to throw off the soil; in terms of structural layout, the electric drive module and the power generation module are arranged independently, and the two are electrically connected, making the layout of the whole machine convenient and flexible.

[0038] Embodiment 2:

[0039] Based on the hybrid power system of a rotary drilling rig described in the first embodiment, this embodiment provides a rotary drilling rig, and the rotary drilling rig is equipped with the hybrid power system of a rotary drilling rig described in the first embodiment.

[0040] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A hybrid power system for a rotary drilling rig, characterized in that: include: Battery modules; The plug-in module and the power generation module are respectively connected to the battery module, and are used to charge the battery module when the battery module is low on power; The electric drive module is connected to the battery module and is used to obtain electric energy from the battery module to drive the main winch or convert the mechanical energy when the main winch is lowered into electric energy and store it in the battery module; The hydraulic drive module is connected to the battery module and is used to obtain electrical energy from the battery module to drive the main pump in the hydraulic system of the whole machine, and the main pump is used to drive the power head motor and the walking device; The vehicle power module is connected to the battery module and is used to obtain electric energy from the battery module to power the electronic heat dissipation device and the vehicle power supply; The plug-in module, power generation module, electric drive module, hydraulic drive module and vehicle power module are independent of each other; It also includes a control module, which is connected to the battery module, the power generation module, the electric drive module, the hydraulic drive module, and the vehicle power module respectively, and is used for signal transmission and control between the modules of the whole machine; Among them, the battery module sends battery power and battery temperature signals to the control module; The control module sends control instructions to the power generation module. When in power generation mode, the control instructions are used to control the engine speed and generator current in the power generation module so that the engine can operate in the optimal fuel working area. At the same time, the power generation module feeds back the engine speed, engine fuel consumption, generator current, and generator temperature signals to the control module. Among them, the control module sends a control instruction to the electric drive module. When it is in the main winch lifting condition, it is used to control the speed and current signal of the first motor in the electric drive module to realize the main winch lifting action; when it is in the main winch lowering condition, the main winch reversely drags the first motor to generate electricity under the load, and stores the electric energy in the battery module. The control module is used to control the speed and current signal of the first motor to prevent the main winch from stalling and falling; at the same time, the electric drive module feeds back the electric drive module operation parameters to the control module; The control module sends a control instruction to the hydraulic drive module to control the speed and current signal of the second motor in the hydraulic drive module, thereby providing a power input that matches the power demand of the hydraulic system; at the same time, the hydraulic drive module feeds back the operating parameters of the hydraulic drive module to the control module; Among them, the control module sends control instructions to the vehicle power module to control the working status of electrical components on the vehicle including the electronic heat dissipation device.

2. A rotary drilling rig hybrid power system according to claim 1, characterized in that: The power generation module includes an engine and a generator driven by the engine. The electric energy generated by the generator is stored in the battery module via a rectifier.

3. A rotary drilling rig hybrid power system according to claim 1, characterized in that: The electric drive module includes a first motor, the first motor is electrically connected to the battery module through a first inverter, and the first motor is connected to the main winch transmission.

4. A rotary drilling rig hybrid power system according to claim 1, characterized in that: The hydraulic drive module includes a second motor, the second motor is electrically connected to the battery module through a second inverter, and the second motor is transmission-connected to the main pump.

5. The hybrid power system of a rotary drilling rig according to claim 1, characterized in that: The vehicle power module includes a DC module, an electronic heat dissipation device and a vehicle power supply, and the electronic heat dissipation device and the vehicle power supply are electrically connected to the battery module through the DC module respectively.

6. A rotary drilling rig hybrid power system according to claim 1, characterized in that: The operating parameters of the electric drive module include speed, current, temperature and main winch speed signal; the operating parameters of the hydraulic drive module include speed, current, temperature and main pump pressure signal.

7. The hybrid power system of a rotary drilling rig according to claim 1, characterized in that: The first motor and the second motor are both permanent magnet synchronous motors.

8. The hybrid power system of a rotary drilling rig according to claim 1, characterized in that: The power input of the whole vehicle is provided by any one or a combination of battery module, plug-in module and power generation module.

9. A rotary drilling rig, characterized in that: The rotary drilling rig is equipped with a rotary drilling rig hybrid power system according to any one of claims 1 to 8.

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