Electric drive type transformed car frame structure of hydraulic system of horizontal directional drilling machine

Abstract

The utility model discloses an electrically-driven modified trolley structure of a hydraulic system of a horizontal directional drilling machine. The electrically-driven modified trolley structure comprises a trolley, a push-pull motor, a push-pull speed reducer, a rotating motor, a rotating speed reducer, a transmission case and a rotating shaft, the push-and-pull motor, the push-and-pull speed reducer, the rotating motor, the rotating speed reducer, the transmission case and the gear are all mounted on the vehicle platform; the output end of the push-pull motor is connected with the input end of the push-pull speed reducer, the output end of the push-pull speed reducer is connected with a gear shaft of the gear, and the gear is meshed with a rack arranged on the drilling machine large frame. The output end of the rotating motor is connected with the input end of the transfer case, the output end of the transfer case is connected with the input end of the rotating speed reducer, the output end of the rotating speed reducer is connected with the input end of the transmission case, and the output end of the transmission case is connected with the rotating shaft. The electric drive type drilling machine has the advantages that an existing hydraulic drive type horizontal directional drilling machine is transformed into the electric drive type drilling machine, and the problems that the size of an existing hydraulic drive type drilling machine is not matched with the size of an electric drive type drilling machine, and the rotating speed and the output torque of a newly-added motor are different from those of an original hydraulic motor are solved. And the equipment cost can be greatly reduced.

Description

Technical Field

[0001] The utility model relates to the field of drilling equipment, in particular to an electrically driven transformation platform structure of a hydraulic system of a horizontal directional drilling rig. Background Art

[0002] Horizontal directional drilling rig is a trenchless technology product, which is widely used in the laying or renewal of pipelines such as water supply, gas, electricity, telecommunications, natural gas, and oil. The existing horizontal directional drilling rig is hydraulically driven, which requires chemical energy to be converted into mechanical energy and then into hydraulic energy. There is an extra level of energy conversion, and there is a certain amount of energy loss. In addition, the horizontal directional drilling rig is not in full load working state for a long time. Most of the time, only 10-30% of the load is working, and the larger the tonnage of the drilling rig, the more low-load working state it has. In order to keep the hydraulic system working normally, the hydraulic system drilling rig has been in a high-pressure circulation state of hydraulic oil, and the energy loss is very large. Under low load conditions of the drilling rig, energy loss accounts for at least 70%. And the proportion of drilling rig fuel consumption in the cost of directional drilling projects is also rising, accounting for about 10-15% of the total cost. When the electric drive drilling rig is connected to the grid, it will only consume electricity when the electrical equipment is working, and it will not always consume fuel like a diesel-liquid generator. When the generator is used for power supply, the equipment considers two working modes of single / dual generator power supply. When the load is low, a single generator can drive the drilling rig to work normally. When the load is heavy, an additional generator is added to provide power. Therefore, the purpose of energy saving and consumption reduction can be achieved by flexibly switching between these two power supply modes.

[0003] Against the backdrop of environmental protection and energy transformation, the electric-drive transformation of horizontal directional drilling rigs is not only a technological innovation, but also a concrete practice of the concept of sustainable development.

[0004] At present, diesel hydraulic horizontal directional drilling rigs are still the mainstream products in the market. A few horizontal directional drilling rig manufacturers have developed and produced a few electric drive drilling rigs, all of which are based on the idea of ​​new research and development, new systems and new architectures. However, the purchase of new electric drive horizontal directional drilling rigs requires costs, and it will also cause the replaced hydraulic horizontal directional drilling rigs to be idle. By reusing and renovating traditional hydraulic horizontal directional drilling rigs, replacing traditional fuel hydraulic systems with electric drive systems can not only significantly reduce emissions and noise, but also improve the operating efficiency and reliability of the equipment. However, there are currently few electric drive horizontal directional drilling rigs that are transformed from old diesel hydraulic horizontal directional drilling rigs on the market.

[0005] At present, the existing technology is mainly the newly developed electric drive horizontal directional drilling rig. In terms of design, they are relatively mature technologies. However, for the electric drive transformation of diesel hydraulic drilling rigs, the original drilling rigs to be transformed must be reused, and the following problems need to be solved:

[0006] 1) The size of the electric motor and the hydraulic motor is different. Since the hydraulic motor is small in size and the original drilling rig hydraulic motor is compact, it is difficult to replace it with an electric motor.

[0007] 2) Due to the difference in drilling speed and output torque between electric motors and hydraulic motors, the reduction ratio and transmission ratio of the original drilling rig reducer are different. The original reducer should be used as much as possible, and a reducer that meets the transmission ratio of the motor should be made with as little modification as possible.

[0008] 3) The main purpose of the electric drill is to reduce energy consumption and thus reduce construction costs. According to the different usage scenarios of the electric drill, the electric drill can achieve different levels of energy saving and consumption reduction. Summary of the invention

[0009] The utility model aims to provide an electrically driven transformation platform structure for the hydraulic system of a horizontal directional drilling rig in view of the deficiencies of the prior art, so as to transform the hydraulic system of the existing drilling rig into an electrically driven system.

[0010] The technical solution adopted by the utility model is: a vehicle platform structure for electrically driven transformation of the hydraulic system of a horizontal directional drilling rig, comprising a vehicle platform, a push-pull motor, a push-pull reducer, a rotary motor, a rotary reducer, a transmission box and a rotary shaft;

[0011] The push-pull motor, push-pull reducer, rotary motor, rotary reducer, transmission box and gear are all installed on the platform; the output end of the push-pull motor is connected to the input end of the push-pull reducer, the output end of the push-pull reducer is connected to the axle of the gear, and the gear is meshed with the rack provided on the drilling rig frame;

[0012] The output end of the rotary motor is connected to the input end of the transfer case, the output end of the transfer case is connected to the input end of the rotary reducer, the output end of the rotary reducer is connected to the input end of the transmission case, and the output end of the transmission case is connected to the rotary shaft.

[0013] According to the above scheme, there are four groups of rotating motors, including two groups of rotating motors A and two groups of rotating motors B, corresponding to which are two rotating reducers A and two rotating reducers B. The four rotating reducers are arranged in groups of two on both sides of the transmission box, wherein the rotating reducer A is located on the left side of the transmission box, and the rotating reducer B is located on the right side of the transmission box.

[0014] According to the above scheme, a transfer case A is arranged on the left side of the two rotary reducers A; two sets of rotary motors A are arranged on the front and rear sides of the transmission case, the output end of the rotary motor A is connected to the input end of the transfer case A, the output end of the transfer case A is connected to the input end of the rotary reducer A, and the rotary reducer A is arranged on the left side of the transmission case.

[0015] According to the above scheme, a transfer case B is arranged on the right side of the two rotary reducers B; the two sets of rotary motors B are arranged on the right side of the transmission case, the output end of the rotary motor B is connected to the input end of the transfer case B, the transfer case B is arranged on the right side of the rotary reducer B, the output end of the transfer case B is connected to the input end of the rotary reducer B, and the output end of the rotary reducer B is connected to the input end of the transmission case.

[0016] The beneficial effects of the utility model are as follows: the utility model transforms the existing hydraulically driven horizontal directional drilling rig into an electric-driven drilling rig, and overcomes the problem of mismatch between the existing hydraulic-driven drilling rig and the electric-driven drilling rig in size by adding and / or adjusting the transfer case in the platform structure; and by adding a first-stage reduction to the original reducer to make the speed and output torque of the newly added motor different from the original hydraulic motor, compared with directly purchasing an electric-driven drilling rig, it can greatly reduce equipment costs, improve construction efficiency, and reduce equipment maintenance work. There are a large number of traditional hydraulic drilling rigs on the market, and the technical solution described in the utility model has broad prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a front view of the platform structure before the drilling rig is modified in this embodiment.

[0018] Figure 2 It is a top view of the present embodiment before modification.

[0019] Figure 3 It is the left view before the modification of this embodiment.

[0020] Figure 4 It is the right side view before transformation of this embodiment.

[0021] Figure 5 It is the front view after the modification of this embodiment.

[0022] Figure 6 It is a top view after the modification of this embodiment.

[0023] Figure 7 It is the left view after the transformation of this embodiment.

[0024] Figure 8 It is the right side view after the modification of this embodiment.

[0025] Fig. 9 It is a three-dimensional schematic diagram after the transformation of this embodiment.

[0026] Figures 5 to 8In the middle: 1. Push-pull motor; 2. Brake; 3. Push-pull reducer (used to connect with push-pull motor); 4. Gear; 5. Rotating motor A (two rotating motors in the middle); 6. Rotating motor B (two rotating motors on the right end); 7. Rotating reducer A (used to connect with rotating motor A); 8. Transfer case A (used to connect with rotating motor A); 9. Transfer case B; 10. Rotating reducer B (used to connect with rotating motor B); 11. Rotating shaft; 12. Transmission box; 13. Car platform.

[0027] Figure 1 to Figure 4 In: 4, gear; 11, rotating shaft; 12, transmission box; 13, platform; 14, push-pull hydraulic motor; 15, rotating hydraulic motor; 16, push-pull reducer; 17, rotating reducer. DETAILED DESCRIPTION

[0028] In order to better understand the present invention, the present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0029] Example

[0030] The original horizontal directional drilling rigs (hereinafter referred to as the original drilling rigs) are all fully hydraulic drilling rigs. The hydraulic system includes hydraulic motors for pushing, pulling and rotating, related hydraulic pipelines and solenoid valves, etc. The power is mainly driven by the diesel engine to drive the hydraulic pump to rotate, and the power is transmitted to the hydraulic motor through high-pressure hydraulic oil. The hydraulic motor is connected to the push-pull reducer, and the push-pull reducer drives the push-pull gear to realize the forward and backward movement of the platform relative to the drilling rig frame (the drilling rig frame is provided with a rack meshing with the gear); the hydraulic motor is connected to the rotary reducer, and the rotary reducer drives the reduction box gear to realize the rotation of the reduction box main shaft, thereby realizing various functions such as loading and unloading drill rods on the drilling rig.

[0031] This embodiment transforms the hydraulic system of a DD625 horizontal directional drilling rig by replacing its original hydraulic system with an electric drive system. The original rig has a push and pull force of 283 tons and a maximum torque of 108,500 Nm. The transformation plan is to change the hydraulic transmission system of the original rig to a motor drive. The reducer of the original rig transmission is retained, and in principle, the transmission force is not increased.

[0032] A method for electrically driving a hydraulic system of a horizontal directional drilling rig, the method comprising the following steps:

[0033] Step 1: Calculate the output speed and output torque of the newly added motor according to the functions and related parameters of the hydraulic motor in the original drilling rig hydraulic system, and select the appropriate model of motor.

[0034] In this embodiment, based on the principle of reuse, the original drilling rig uses four sets of rotary reducers plus hydraulic motors to realize its rotary function, where the rotary reduction ratio is 1:40; the push-pull walking uses four sets of walking reducers plus hydraulic motors to realize its push-pull walking function, where the push-pull walking reduction ratio is 1:25. Since the motor speed is much higher than the original hydraulic motor speed, in order to reduce the speed, a set of 1:5 reducers is added on the basis of the original reducer, and the total reduction ratio reaches 1:125; that is, the reducer of the newly added motor adds one stage of reduction to make the speed adapt to the speed of the original drilling rig.

[0035] 1) Calculate the relevant parameters of the motor used to drive the drilling rig to rotate and determine the output speed of the rotating motor.

[0036] In this embodiment, the relevant parameters of the original drilling rig rotation action are: the transfer case reduction ratio is 1:40; the maximum torque of the rotation action is 224KNM; the maximum speed of the rotation action is 67.5RPM; the rated speed of the rotation action is 112KNM; the rated torque of the rotation action is 37.5RPM. The final requirement of the rotation torque is: the maximum output torque is not less than 100000Nm, and the rated speed is 30rpm.

[0037] In this embodiment, the original drilling rig hydraulic system includes four rotating machine positions (installing four hydraulic motors originally used to drive the drilling rig to rotate), which can be used for four motors to work simultaneously. According to the reduction ratio calculation, the motor speed is between 1000rpm-1500rpm, and the output torque is 625Nm. The motor with a rotation speed of 1000rpm has a final output speed of 25rpm; the motor with a rotation speed of 1500rpm has a final output speed of 37.5rpm.

[0038] 2) Calculate the relevant parameters of the motor used to drive the drilling rig to push and pull, and determine the output torque of the push and pull motor.

[0039] In this embodiment, the relevant parameters of the push-pull action of the original drilling rig are: transfer case reduction ratio: 1st speed ratio (1:5) (preliminary consideration, customizable and changeable), 2nd speed ratio (1:25); the maximum push-pull force of the push-pull action is 4000KN; the maximum speed of the push-pull action is 21.6RPM; the rated speed of the push-pull part is 12RPM; the rated push-pull force of the push-pull part is 2622KN; the pitch circle diameter is 320mm, corresponding to a travel distance of 1m per revolution.

[0040] The drilling rig track length is about 10m, and the entire journey is required to be controlled within 1.5 minutes, so the output speed is not less than 6.7rpm.

[0041] In this embodiment, the original drilling rig hydraulic system includes four push-pull walking positions (four hydraulic motors originally used to drive the drilling rig to push and pull walking are installed), and 4 push-pull motors can be used to replace the hydraulic motors to work simultaneously. According to the reduction ratio calculation, the motor speed is 1000rpm and the walking speed is 8m / min. Taking a single motor outputting 50 tons of thrust as an example, the motor output torque requirement is 627Nm. For example, 75 tons of thrust, the motor output torque requirement is 940Nm. For example, 100 tons of thrust, the motor output torque requirement is 1254Nm.

[0042] (3) According to the output speed and torque of the motor, and taking into account the motor performance and price parameters, the motor is selected and the original reducer is modified to add a first-stage reduction.

[0043] In this embodiment, according to the design requirements, motor performance and motor price, it is planned to use the Langgao horizontal directional drilling rig special motor, model YQW3-225C2-10A-RA2; the inverter matching the motor adopts the Huichuan vehicle-mounted inverter, model ICMD10 series dual drive (LD32); and the matching Huichuan vehicle-mounted rectifier unit, model CMR10-250.

[0044] Step 2: Plan the overall electronic control process and power circuit diagram.

[0045] Based on the selected motor and the control requirements for the motor (control of speed, torque, etc.), design the overall motor control solution, and make the motor control flow chart and power system diagram.

[0046] In the utility model, the speed and torque of the motor are controlled so that the drilling rig can realize the functions of rotation and push-pull walking to meet the production requirements. In this embodiment, the design and production of the motor control scheme, the motor control flow chart and the power system diagram can all adopt existing conventional technologies.

[0047] In the utility model, the power supply of the modified drilling rig can adopt a single / dual generator power supply mode. The specific method is: the power supply interface of the drilling rig is designed to be two selectable modes, and at the rear end of the interface, all the electrical equipment of the drilling rig is divided into two groups, and the cables used by each group of electrical equipment are relatively independent and not connected to each other. When a single generator is selected for power supply, both groups of electrical equipment are connected there; when dual generators are selected for power supply, the two groups of electrical equipment are isolated from each other and are powered by a generator respectively, and will not be affected by whether the frequency of the AC power is synchronized.

[0048] Step 3: Disassemble some components of the hydraulic system of the original drilling rig, including the hydraulic motor, all hydraulic oil pipelines and valves.

[0049] In this embodiment, eight hydraulic motors, all hydraulic oil pipelines, solenoid valves, and control circuits corresponding to the solenoid valves of the original drilling rig are disassembled.

[0050] Step 4: Inspect, maintain or repair the remaining mechanical parts of the original drilling rig hydraulic system.

[0051] In the utility model, the mechanical parts retained are mainly the frame and transmission parts in the original drilling rig, such as the reducer and the gear rack for the drilling rig to travel.

[0052] Step 5: Make processed parts and purchase motors and supporting components, including rectifiers, motor drivers, etc.

[0053] The processing parts in the utility model include planetary gears for increasing the reduction ratio and a transmission box for separating the motor.

[0054] Step 6: Measure the size of the hydraulic motor on the original drilling rig platform, plan the location of the newly added motor, and complete the assembly of the platform structure of the horizontal directional drilling rig hydraulic system electric drive transformation. In the present utility model, when the space for installing the hydraulic motor in the original drilling rig is insufficient to install the motor, it is solved by adjusting and / or adding a transfer case.

[0055] The hydraulic system of the drilling rig is installed on the platform structure, and the platform can move relative to the drilling rig frame. Figures 1 to 4 As shown, the push-pull hydraulic motor 14, the push-pull reducer 16, the rotary hydraulic motor 15, the rotary reducer 17, and the gear 4 are all installed on the platform 13. The push-pull hydraulic motor 14 is connected to the axle of the gear 4 through the push-pull reducer 16. The gear 4 is meshed with the rack provided on the drilling rig frame. The push-pull hydraulic motor 14 drives the gear 4 to rotate through the push-pull reducer 16 and the gear axle to realize the forward and backward movement of the platform 13; the rotary hydraulic motor 15 transmits power to the rotary shaft 11 through the rotary reducer 17 and the transmission box 12, and the rotary hydraulic motor 15 drives the rotary shaft 11 to rotate.

[0056] The structure of the platform after the original drilling rig is transformed into an electric drive type is as follows Figures 5 to 8 As shown. Figures 1 to 4 The hydraulic motor and the matching pipeline valve (the pipeline valve is not shown) are installed in the original installation position of the hydraulic motor.

[0057] In this embodiment, the dimensions of each hydraulic motor of the original drilling rig are 200×100×150mm, while the dimensions of the motor are 500×500×600mm, which is much larger. The spatial structure of the hydraulic system of the original drilling rig is difficult to meet the installation requirements of the motor: 1. The two rotating motors at the far right (i.e. Figure 7 The rotating motor B6 in the original drilling rig uses a hydraulic motor, and two reducers (i.e. Figure 7The center distance of the rotating reducer B10 in the middle is only 360mm, which cannot meet the requirements of placing the motors in parallel), that is, two transfer cases B9 are placed front and back to solve the problem; and the rotating motor in the middle (that is Figure 7 In addition to this problem, there is also the problem of insufficient space on the left side (if the horizontally installed motor does not turn, it will conflict with the longitudinally installed motor and cannot be installed). Therefore, on the basis of adding the transfer case A8, the motor is also reversed (that is, Figure 7 The two rotating motors A5 in the vehicle are used to meet the assembly space requirements. The modified vehicle connection structure is as follows:

[0058] A vehicle platform structure for electric drive transformation of a hydraulic system of a horizontal directional drilling rig, comprising a vehicle platform 13, a push-pull motor 1, a push-pull reducer 3, a rotary motor, a rotary reducer, a transmission box 12 and a rotary shaft 11;

[0059] The push-pull motor 1, the push-pull reducer 3, the rotary motor, the rotary reducer, the transmission box 12 and the gear are all installed on the platform 13; the output end of the push-pull motor 1 is connected to the input end of the push-pull reducer 3, the output end of the push-pull reducer 3 is connected to the axle of the gear, and the gear is meshed with the rack provided on the drilling rig frame;

[0060] The output end of the rotary motor is connected to the input end of the transfer case, the output end of the transfer case is connected to the input end of the rotary reducer, the output end of the rotary reducer is connected to the input end of the transmission case 12, and the output end of the transmission case 12 is connected to the rotating shaft 11.

[0061] The walking function principle is: the push-pull motor 1 drives the axle of the gear to rotate through the push-pull reducer 3, and the gear rotates accordingly and meshes with the rack on the drilling rig frame, thereby realizing the forward and backward walking of the platform 13.

[0062] The principle of the rotation function is: the rotating motor transmits power to the rotating shaft 11 through the rotating reducer and the transmission box 12, thereby driving the rotating shaft 11 to rotate; this is common knowledge in the industry and will not be repeated here.

[0063] In this embodiment, there are four groups of push-pull motors 1, which are arranged opposite to each other in pairs and located at the left end of the platform 13. Each push-pull motor 1 is respectively configured with a push-pull reducer 3; at least one group of push-pull motors 1 is configured with a brake 2.

[0064] In this embodiment, there are four groups of rotating motors, including two groups of rotating motors A5 and two groups of rotating motors B6, corresponding to which are two rotating reducers A7 and two rotating reducers B10. The four rotating reducers are arranged in groups of two on both sides of the transmission box 12, wherein the rotating reducer A7 is located on the left side of the transmission box 12, and the rotating reducer B7 is located on the right side of the transmission box 12.

[0065] In this embodiment, a transfer case A8 is provided on the left side of the two rotary reducers A7; two sets of rotary motors A5 are respectively provided on the front and rear sides of the transmission case 12, the output end of the rotary motor A5 is connected to the input end of the transfer case A8, and the output end of the transfer case A8 is connected to the input end of the rotary reducer A7, and the rotary reducer A7 is provided on the left side of the transmission case 12 (i.e., one end close to the push-pull motor 1).

[0066] In this embodiment, a transfer case B9 is provided on the right side of the two rotary reducers B8; the two sets of rotary motors B6 are both provided on the right side of the transmission case 12, the output end of the rotary motor B6 is connected to the input end of the transfer case B9, the transfer case B9 is provided on the right side of the rotary reducer B10, the output end of the transfer case B9 is connected to the input end of the rotary reducer B10, and the output end of the rotary reducer B10 is connected to the input end of the transmission case 12.

[0067] In this embodiment, the modified push-pull reducer and rotary reducer are both modified based on the original drilling rig reducer by adding a stage of reduction in accordance with design requirements.

[0068] Step 7. Match the corresponding connection cables according to the electrical equipment.

[0069] Step 8: Equipment debugging. After qualified debugging, it can be put into production.

[0070] The drilling rig is debugged after the transformation to make its performance meet the requirements.

[0071] In this embodiment, relevant parameters of the drilling rig before and after modification are shown in Table 1.

[0072] Table 1 Related parameters of drilling rig before and after transformation

[0073]

[0074] The relevant parameters in Table 1 are all conventional parameters in the industry and will not be repeated here.

[0075] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0076] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. However, any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An electrically driven transformation platform structure for a hydraulic system of a horizontal directional drilling rig, characterized in that: It includes a platform, a push-pull motor, a push-pull reducer, a rotary motor, a rotary reducer, a transmission box and a rotary shaft; The push-pull motor, push-pull reducer, rotary motor, rotary reducer, transmission box and gear are all installed on the platform; the output end of the push-pull motor is connected to the input end of the push-pull reducer, the output end of the push-pull reducer is connected to the axle of the gear, and the gear is meshed with the rack provided on the drilling rig frame; The output end of the rotary motor is connected to the input end of the transfer case, the output end of the transfer case is connected to the input end of the rotary reducer, the output end of the rotary reducer is connected to the input end of the transmission case, and the output end of the transmission case is connected to the rotary shaft.

2. The platform structure according to claim 1, characterized in that: There are four groups of rotating motors, including two groups of rotating motors A and two groups of rotating motors B, corresponding to which are two rotating reducers A and two rotating reducers B. The four rotating reducers are arranged in groups of two on both sides of the transmission box, wherein the rotating reducer A is located on the left side of the transmission box, and the rotating reducer B is located on the right side of the transmission box.

3. The platform structure according to claim 2, characterized in that: A transfer case A is arranged on the left side of the two rotary reducers A; two sets of rotary motors A are arranged on the front and rear sides of the transmission case, the output end of the rotary motor A is connected to the input end of the transfer case A, and the output end of the transfer case A is connected to the input end of the rotary reducer A, and the rotary reducer A is arranged on the left side of the transmission case.

4. The platform structure according to claim 1, characterized in that: A transfer case B is arranged on the right side of the two rotary reducers B; the two sets of rotary motors B are arranged on the right side of the transmission case, the output end of the rotary motors B is connected to the input end of the transfer case B, the transfer case B is arranged on the right side of the rotary reducer B, the output end of the transfer case B is connected to the input end of the rotary reducer B, and the output end of the rotary reducer B is connected to the input end of the transmission case.

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