CN204099302U - Rotary drilling rig master winch floating type controlled system and rotary drilling rig - Google Patents
Rotary drilling rig master winch floating type controlled system and rotary drilling rig Download PDFInfo
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- CN204099302U CN204099302U CN201420501026.XU CN201420501026U CN204099302U CN 204099302 U CN204099302 U CN 204099302U CN 201420501026 U CN201420501026 U CN 201420501026U CN 204099302 U CN204099302 U CN 204099302U
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Abstract
The utility model discloses a kind of rotary drilling rig master winch floating type controlled system and rotary drilling rig, this rotary drilling rig master winch floating type controlled system comprises main winch motor, switch valve and back pressure apparatus, and main winch motor has the first hydraulic fluid port and the second hydraulic fluid port; Switch valve connects the first hydraulic fluid port and the second hydraulic fluid port respectively, and controls the break-make of oil circuit between the first hydraulic fluid port and the second hydraulic fluid port; Back pressure apparatus and switch valve are connected on the oil circuit between the first hydraulic fluid port and the second hydraulic fluid port, be communicated with oil circuit and disconnect oil circuit when the hydraulic fluid pressure of its filler opening is less than scheduled pressure value when the hydraulic fluid pressure of its filler opening is more than or equal to scheduled pressure value.The utility model is in rotary drilling rig floating control drilling rod decentralization process, can effectively avoid because the state of incomplete tensioning appears in wire rope, prevent steel cable flexible from wearing and tearing and disorder cable, ensure that wire rope normally works, extend its working life, reduce the probability ruptured because of master winch steel rope abrasion, improve the Security that construction is produced.
Description
Technical field
The utility model relates to engineering machinery field, particularly a kind of rotary drilling rig master winch floating type controlled system and rotary drilling rig.
Background technique
Rotary drilling rig is a kind of soil taking hole forming filling pile construction machinery, it comprises master winch, pressurization device, unit head, drilling rod, drilling tool etc., drive drilling rod and drilling tool to transfer to working position by master winch during work, then drive drilling rod and drilling tool to hole downwards by pressurization device and unit head.
Usually, churning driven chance is provided with master winch floating system, it is mainly used for rotary drilling rig and performs when creeping into work, two hydraulic fluid ports of main winch motor are communicated with, main winch motor is in quick condition, thus the deadweight of drilling rod and drilling tool can be utilized to drive main winch motor to rotate, realize drilling rod and automatically transfer.The deadweight that master winch floating system make use of drill rod boring tool is pressurizeed, and saves pressurization energy consumption, simple and reliable, and well solves the problem of master winch and pressurization device co-ordination.
But, when master winch floating system makes main winch motor be in quick condition, drilling rod lowering velocity is determined by the deadweight of drilling rod and drilling tool and the resistance that is subject to thereof usually, when drilling construction stratum condition is changeable, the resistance meeting frequent variations be subject in drilling tool drilling process, the speed causing drilling rod to be transferred is unstable, sometimes fast and sometimes slow, and now because main winch motor is in quick condition, main winch motor is completely uncontrolled with drilling rod motion, causes master winch wire rope can occur the situation of incomplete tensioning along with the change of speed below drilling rod.This is easy to cause steel cable flexible to wear and tear and disorder cable, affects the wire rope normal work and use life-span, can cause master winch wire cable rupture time serious, cause security incident.
Model utility content
In view of this, the utility model provide on the one hand a kind of rotary drilling rig master winch floating type controlled system its can automatically control master winch and transfer, and effectively can solve the incomplete tensioning problem of master winch wire rope in floating decentralization process, promote the working security of rotary drilling rig.
On the one hand, the utility model provides a kind of rotary drilling rig master winch floating type controlled system, comprising: main winch motor, and described main winch motor has the first hydraulic fluid port and the second hydraulic fluid port; Switch valve, described switch valve connects described first hydraulic fluid port and described second hydraulic fluid port respectively, and controls the break-make of oil circuit between described first hydraulic fluid port and described second hydraulic fluid port; Be communicated with oil circuit when the hydraulic fluid pressure of its filler opening is more than or equal to scheduled pressure value and disconnect the back pressure apparatus of oil circuit when the hydraulic fluid pressure of its filler opening is less than described scheduled pressure value, described back pressure apparatus and described switch valve are connected on the oil circuit between described first hydraulic fluid port and described second hydraulic fluid port.
Further, described back pressure apparatus is back pressure valve.
Further, described back pressure valve is automatically controlled ratio back pressure valve; Described rotary drilling rig master winch floating type controlled system also comprises the first controller of the back pressure value for regulating described back pressure valve, and described first controller is connected with the control end of described back pressure valve.
Further, described first controller is also connected with the input device of the control information for inputting described back pressure valve.
Further, the pulling force sensor of the second controller controlling positive/negative turn of described main winch motor and detection master winch lineoutofservice signal pull is also comprised; Described second controller is connected with described pulling force sensor, and controls positive/negative turn of described main winch motor according to the value of thrust of the detection of described pulling force sensor.
Further, described switch valve is solenoid directional control valve, and the control end of described solenoid directional control valve is connected with described second controller, and described second controller controls the commutation of described solenoid directional control valve according to the value of thrust of the detection of described pulling force sensor.
Further, also comprise flow control valve, described flow control valve is arranged on the oil circuit between described switch valve and described first hydraulic fluid port and/or described second hydraulic fluid port, and contacts with described back pressure apparatus.
Further, also comprise the 3rd controller, described flow control valve is operated proportional flow control valve, and described 3rd controller is connected with the control end of described operated proportional flow control valve.
Further, described operated proportional flow control valve is proportional velocity regulating valve.
On the other hand, the utility model also provides a kind of rotary drilling rig, and it is provided with the rotary drilling rig master winch floating type controlled system as above described in any one.
The oil circuit of rotary drilling rig master winch floating type controlled system of the present utility model between main winch motor first hydraulic fluid port and the second hydraulic fluid port arranges back pressure apparatus, oil circuit is set up certain pressure, thus provide pretightening force for master winch wire rope.In rotary drilling rig floating control drilling rod decentralization process, can effectively avoid because the state of incomplete tensioning appears in wire rope, prevent steel cable flexible from wearing and tearing and disorder cable, ensure that wire rope normally works, extend its working life, reduce the probability ruptured because of master winch steel rope abrasion, improve the Security that construction is produced.
Rotary drilling rig of the present utility model is provided with above-mentioned rotary drilling rig master winch floating type controlled system, thus also has identical technique effect, repeats no more.
Accompanying drawing explanation
The accompanying drawing forming a part of the present utility model is used to provide further understanding of the present utility model, and schematic description and description of the present utility model, for explaining the utility model, is not formed improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 provides a kind of structural representation of rotary drilling rig master winch floating type controlled system for the utility model embodiment;
Fig. 2 provides a kind of structural representation of rotary drilling rig master winch floating type controlled system for another embodiment of the utility model.
Description of reference numerals
1-main winch motor; 2-switch valve; 3-back pressure apparatus; 4-flow control valve.
Embodiment
It should be noted that, when not conflicting, the embodiment in the utility model and the feature in embodiment can combine mutually.Below with reference to the accompanying drawings and describe the utility model in detail in conjunction with the embodiments.
The structural representation of the rotary drilling rig master winch floating type controlled system that Fig. 1 provides for the utility model embodiment.For ease of describing, the back pressure valve in this embodiment is described with the form of relief valve.This rotary drilling rig master winch floating type controlled system comprises main winch motor 1, it has the first hydraulic fluid port and the second hydraulic fluid port, a switch valve 2 is provided with between first hydraulic fluid port and the second hydraulic fluid port, this switch valve 2 directly connects the first hydraulic fluid port and the second hydraulic fluid port by oil circuit, thus control the break-make of oil circuit between the first hydraulic fluid port and the second hydraulic fluid port, as shown in Figure 1, this switch valve 2 is preferably two position and four-way reversing valves; This rotary drilling rig master winch floating type controlled system also comprises a back pressure apparatus 3, and switch valve 2 is connected in series on the oil circuit between the first hydraulic fluid port of main winch motor 1 and the second hydraulic fluid port, this back pressure apparatus 3 is communicated with oil circuit when its inlet pressure is more than or equal to certain scheduled pressure value, and disconnect oil circuit when the hydraulic fluid pressure of its filler opening is less than this scheduled pressure value, as shown in Figure 1, this back pressure apparatus 3 illustrates with the form of relief valve.
When rotary drilling rig needs master winch to float, switch valve 2 is communicated with the oil circuit between the first hydraulic fluid port of main winch motor 1 and the second hydraulic fluid port, now, drilling rod relies on self gravitation to drive main winch motor 1 to rotate, due to the oil circuit between the first hydraulic fluid port and the second hydraulic fluid port being also provided with back pressure apparatus 3, therefore, when the pressure at the filler opening place of back pressure apparatus 3 on this oil circuit reaches scheduled pressure value, ability conducting between first hydraulic fluid port and the second hydraulic fluid port, main winch motor 1 could be rotated, and then realizes rotary drilling rig floating control drilling rod and transfer.Back pressure apparatus 3 be arranged so that the oil circuit between the first hydraulic fluid port and the second hydraulic fluid port can keep certain pressure, thus master winch wire rope can be made in floating control drilling rod decentralization process to have a pretightening force upwards, wire rope can be kept to be in pre-strained state all the time.
Therefore, in floating control decentralization process, master winch wire rope creeps into downwards along with drilling rod and releases from master winch reel, when drilling rod runs into formation resistance inequality, drilling rod lowering velocity frequent variations can be caused, if the resistance run into is less, then master winch wire rope can be in pre-strained state because of the existence of pretightening force, if the resistance run into is larger, the pulling force of drilling rod to master winch wire rope is significantly reduced, cause that the hydraulic fluid pressure between the first hydraulic fluid port of main winch motor 1 and the second hydraulic fluid port on oil circuit is also corresponding significantly to be reduced, once pressure is less than scheduled pressure value, then back pressure apparatus 3 disconnects oil circuit, main winch motor 1 cannot be rotated, prevent master winch wire rope from continuing to transfer, thus master winch wire rope also can be made to a certain extent to keep tensioning state.Therefore, this rotary drilling rig master winch floating type controlled system is in rotary drilling rig floating control drilling rod decentralization process, can effectively avoid because the state of incomplete tensioning appears in wire rope, prevent steel cable flexible from wearing and tearing and disorder cable, ensure that wire rope normally works, extend its working life, reduce the probability ruptured because of master winch steel rope abrasion, improve the Security that construction is produced.
Those skilled in the art should be understood that, the effect of the back pressure apparatus 3 in this embodiment is that the oil circuit before its filler opening sets up certain pressure (being more than or equal to scheduled pressure value), and when force value reaches scheduled pressure value just conducting oil circuit, make main winch motor be in quick condition.Therefore, when rotary drilling rig floating control drilling rod is transferred, if the first hydraulic fluid port oil-feed of main winch motor 1, the second hydraulic fluid port is fuel-displaced, then its filler opening should be connected the second hydraulic fluid port of main winch motor 1 by the back pressure apparatus 3 in this embodiment, is namely this kind of situation shown in Fig. 1; Otherwise then its filler opening is connected the first hydraulic fluid port of main winch motor 1 by back pressure apparatus 3.
In addition, above-mentioned scheduled pressure value is the force value according to factor settings such as the model of rotary drilling rig and actual conditionss, the selection of this scheduled pressure value should meet can enable drilling rod rely on deadweight to realize floating transferring, again for master winch wire rope provides certain pretightening force.
In this embodiment, although switch valve 2 is preferably solenoid directional control valve, be more preferably two four-way electromagnetic reversing valves, in other embodiments, also can select other forms of switch valve, back pressure apparatus 3 in this embodiment have employed the form of relief valve, in other embodiments, other can also be adopted can to realize the back pressure valve of above-mentioned functions, as Decompression valves, the valve body forms such as one-way valve, certainly, except adopting back pressure valve, the form of pressure transducer and solenoid directional control valve combination can also be adopted, such as pressure transducer is connected with the control end of solenoid directional control valve, oil circuit is off during the work of solenoid directional control valve original position, pressure transducer gathers the hydraulic fluid pressure in the front oil duct of selector valve filler opening, if hydraulic fluid pressure is more than or equal to scheduled pressure value, then control selector valve commutation conducting oil circuit, otherwise keep or commutate as the original position of selector valve.
Implementation hereafter for back pressure valve as back pressure apparatus 3, continues to introduce in more detail this rotary drilling rig master winch floating type controlled system embodiment.
As the optimal way of this embodiment, this back pressure valve is preferably automatically controlled ratio back pressure valve, this rotary drilling rig master winch floating type controlled system also comprises the first controller (not shown), this first controller is connected with the control end of this automatically controlled ratio back pressure valve, for regulating the back pressure value of this automatically controlled ratio back pressure valve, be applicable to the rotary drilling rig of different model, different drilling rods or different operating modes to enable this rotary drilling rig master winch floating type controlled system.
Conveniently the back pressure value of operator to automatically controlled ratio back pressure valve adjusts, above-mentioned first controller is also connected with input device, for inputting the control information of automatically controlled ratio back pressure valve, this input device is preferably arranged in operator cabin control zone, as touch-control entr screen etc.
In addition, as another preferred version of this embodiment, this rotary drilling rig master winch floating type controlled system also comprises the second controller (not shown) controlling positive/negative turn of main winch motor, and detect the pulling force sensor of master winch lineoutofservice signal pull, second controller is connected with pulling force sensor, and the value of thrust according to pulling force sensor controls positive/negative turn of main winch motor.Further, this second controller is also connected with the control end of the solenoid directional control valve as switch valve, controls solenoid directional control valve commutation according to the value of thrust of pulling force sensor, namely controls the float function of opening or closing rotary drilling rig.
Below for the rotary drilling rig master winch floating type controlled system in above-described embodiment, describe its working principle in detail.
When rotary drilling rig ACTIVE CONTROL master winch and lowering drill pipes time, if drilling rod contacts to earth first, the pulling force of master winch wire rope changes, and after thus contacting to earth, the pulling force of master winch wire rope can be less than the deadweight of drilling rod.Pulling force sensor detects the pulling force of master winch wire rope in real time, and the value of thrust of detection is passed to second controller, when the value of thrust detected is less than drilling rod deadweight, is then considered as drilling rod and contacts to earth, second controller then controls to commutate as the solenoid directional control valve of switch valve 2, opens floating control function; After this, main winch motor is conducted oneself with dignity by drilling rod and is driven, along with drilling rod creeps into downwards, hydraulic fluid pressure between main winch motor second hydraulic fluid port and back pressure valve on oil circuit increases gradually, when hydraulic fluid pressure reaches scheduled pressure value, i.e. during the cracking pressure of back pressure valve, the oil circuit between back pressure valve conducting first hydraulic fluid port and the second hydraulic fluid port, main winch motor enters quick condition, and drilling rod carries out floating control and transfers state.
Transfer in control procedure at drill rod floating, certain pressure is had due to the oil circuit of back pressure valve between the first hydraulic fluid port and the second hydraulic fluid port being set up, therefore there is certain pulling force all the time in master winch wire rope, pretightening force namely mentioned above, make wire rope be in pre-strained state.
If in the process, when drilling rod is subject to the resistance increase on stratum, if resistance is less, then master winch wire rope can be in pre-strained state because of the existence of pretightening force, if the resistance run into is comparatively large, the pulling force of drilling rod to master winch wire rope is significantly reduced, back pressure apparatus 3 disconnects oil circuit, main winch motor 1 cannot be rotated, prevent master winch wire rope from continuing to transfer, master winch wire rope thus also can be made to a certain extent to keep tensioning state.If for a certain reason, cause master winch wire rope to occur incomplete tensioning state, pulling force sensor detects its pulling force and is less than warp value of thrust, then second controller control main winch motor rotates backward, and is packed up by master winch wire rope, until steel wire tensioning.Wherein, warp value of thrust is different situations according to equipment and default pulling force threshold value, once master winch wire rope is less than this pulling force threshold value, then can be judged as that incomplete tensioning state appears in master winch wire rope.
So far can find out, above-described embodiment not only can by arranging back pressure apparatus 3 on the oil circuit between first hydraulic fluid port and the second hydraulic fluid port of main winch motor, so that for master winch wire rope provides pretightening force, can also when there is incomplete tensioning state in master winch wire rope, control main winch motor is reversed, master winch wire rope is strained, thus can effectively avoid because the state of incomplete tensioning appears in wire rope, prevent steel cable flexible from wearing and tearing and disorder cable, ensure that wire rope normally works, extend its working life, reduce the probability ruptured because of master winch steel rope abrasion, improve the Security that construction is produced.
The utility model also provides rotary drilling rig master winch floating type controlled system another preferred embodiment, as shown in Figure 2, compared with a upper embodiment, the preferred embodiment is on the basis of a upper embodiment, oil circuit between main winch motor 1 first hydraulic fluid port and the second hydraulic fluid port sets up flow control valve 4, and this flow control valve 4 and back pressure apparatus 3 has been contacted access in oil circuit.In order to can the aperture of control flow check control valve 4, to regulate the hydraulic fluid flow rate of oil circuit between the first hydraulic fluid port and the second hydraulic fluid port, flow control valve 4 in this embodiment is preferably operated proportional flow control valve, and the control end of operated proportional flow control valve is connected with the 3rd controller (not shown), as preferably, 3rd controller also can be connected with the input device in main frame operator cabin control zone, and convenient operation personnel input information with the aperture of control ratio flow control valve.As shown in Figure 2, this operated proportional flow control valve is preferably proportional velocity regulating valve.
The object of setting up flow control valve 4 is in order to the hydraulic fluid flow rate by oil circuit between adjustment first hydraulic fluid port and the second hydraulic fluid port, realize under master winch quick condition, control the speed that drilling rod creeps into downwards, avoid in the downward rate of penetration of drilling rod too fast, prevent from meeting obstructions suddenly when drilling rod fast drilling, cause wire rope to occur incomplete tensioning state.On the other hand, in practice of construction process, when rotary drilling rig ACTIVE CONTROL drilling rod is transferred, drilling rod there will be the situation of touching hole wall, thus there is false erroneous judgement of contacting to earth, if now system or artificial judgment are that drilling rod contacts to earth, and open floating control function accordingly, then be easy to cause drilling rod to hurtle down with the speed of freely falling body, accidents caused, setting up flow control valve in the present embodiment, drilling rod falling speed can be controlled by regulating the flow in oil circuit, effectively avoid drilling rod to fall too fast, try to avert accidents.
Correspondingly, the utility model embodiment also provides a kind of rotary drilling rig, and it is provided with any one rotary drilling rig master winch floating type controlled system above-mentioned.This rotary drilling rig has master winch floating type controlled system same as described above, therefore also has beneficial effect same as described above, repeats no more.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (10)
1. a rotary drilling rig master winch floating type controlled system, is characterized in that, comprising:
Main winch motor, described main winch motor has the first hydraulic fluid port and the second hydraulic fluid port;
Switch valve, described switch valve connects described first hydraulic fluid port and described second hydraulic fluid port respectively, and controls the break-make of oil circuit between described first hydraulic fluid port and described second hydraulic fluid port;
Be communicated with oil circuit when the hydraulic fluid pressure of its filler opening is more than or equal to scheduled pressure value and disconnect the back pressure apparatus of oil circuit when the hydraulic fluid pressure of its filler opening is less than described scheduled pressure value, described back pressure apparatus and described switch valve are connected on the oil circuit between described first hydraulic fluid port and described second hydraulic fluid port.
2. rotary drilling rig master winch floating type controlled system according to claim 1, is characterized in that, described back pressure apparatus is back pressure valve.
3. rotary drilling rig master winch floating type controlled system according to claim 2, is characterized in that, described back pressure valve is automatically controlled ratio back pressure valve;
Described rotary drilling rig master winch floating type controlled system also comprises the first controller of the back pressure value for regulating described back pressure valve, and described first controller is connected with the control end of described back pressure valve.
4. rotary drilling rig master winch floating type controlled system according to claim 3, is characterized in that, described first controller is also connected with the input device of the control information for inputting described back pressure valve.
5. rotary drilling rig master winch floating type controlled system as claimed in any of claims 1 to 4, is characterized in that, also comprises the second controller controlling positive/negative turn of described main winch motor and the pulling force sensor detecting master winch lineoutofservice signal pull; Described second controller is connected with described pulling force sensor, and controls positive/negative turn of described main winch motor according to the value of thrust that described pulling force sensor detects.
6. rotary drilling rig master winch floating type controlled system according to claim 5, it is characterized in that, described switch valve is solenoid directional control valve, the control end of described solenoid directional control valve is connected with described second controller, and described second controller controls the commutation of described solenoid directional control valve according to the value of thrust that described pulling force sensor detects.
7. rotary drilling rig master winch floating type controlled system according to claim 6, it is characterized in that, also comprise flow control valve, described flow control valve is arranged on the oil circuit between described switch valve and described first hydraulic fluid port and/or described second hydraulic fluid port, and contacts with described back pressure apparatus.
8. rotary drilling rig master winch floating type controlled system according to claim 7, is characterized in that, also comprises the 3rd controller, and described flow control valve is operated proportional flow control valve, and described 3rd controller is connected with the control end of described operated proportional flow control valve.
9. rotary drilling rig master winch floating type controlled system according to claim 8, is characterized in that, described operated proportional flow control valve is proportional velocity regulating valve.
10. a rotary drilling rig, is characterized in that, is provided with the rotary drilling rig master winch floating type controlled system in claim 1 to 9 described in any one.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420501026.XU CN204099302U (en) | 2014-09-01 | 2014-09-01 | Rotary drilling rig master winch floating type controlled system and rotary drilling rig |
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| CN201420501026.XU CN204099302U (en) | 2014-09-01 | 2014-09-01 | Rotary drilling rig master winch floating type controlled system and rotary drilling rig |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104713786A (en) * | 2015-03-17 | 2015-06-17 | 项俊俊 | Device for detecting strength of diamond grinding disk |
| CN108423589A (en) * | 2018-04-04 | 2018-08-21 | 三重工股份有限公司 | Winch floats system and rotary drilling rig for rotary drilling rig |
| CN110104576A (en) * | 2019-06-04 | 2019-08-09 | 上海中联重科桩工机械有限公司 | Rotary drilling rig master winch control system and rotary drilling rig |
| CN110173483A (en) * | 2019-06-28 | 2019-08-27 | 北京三一智造科技有限公司 | Hydraulic system and rotary drilling rig |
| CN110329936A (en) * | 2019-06-27 | 2019-10-15 | 三一重机有限公司 | Tension structure, static pressure board-plugging device wirerope elevator structure and static pressure board-plugging device |
| WO2020057254A1 (en) * | 2018-09-20 | 2020-03-26 | 徐州徐工基础工程机械有限公司 | Hoisting steel wire rope automatic tensioning control system and diaphragm wall grab bucket machine |
| CN111577715A (en) * | 2020-05-31 | 2020-08-25 | 北京三一智造科技有限公司 | Winch tension control device, rotary drilling rig and winch tension control method |
| CN114620631A (en) * | 2022-05-12 | 2022-06-14 | 徐州徐工基础工程机械有限公司 | Steel wire rope protection control system and method for rotary drilling rig |
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2014
- 2014-09-01 CN CN201420501026.XU patent/CN204099302U/en active Active
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104713786A (en) * | 2015-03-17 | 2015-06-17 | 项俊俊 | Device for detecting strength of diamond grinding disk |
| CN104713786B (en) * | 2015-03-17 | 2017-09-01 | 项俊俊 | Diamond disk intensity detecting device |
| CN108423589A (en) * | 2018-04-04 | 2018-08-21 | 三重工股份有限公司 | Winch floats system and rotary drilling rig for rotary drilling rig |
| WO2020057254A1 (en) * | 2018-09-20 | 2020-03-26 | 徐州徐工基础工程机械有限公司 | Hoisting steel wire rope automatic tensioning control system and diaphragm wall grab bucket machine |
| CN110104576A (en) * | 2019-06-04 | 2019-08-09 | 上海中联重科桩工机械有限公司 | Rotary drilling rig master winch control system and rotary drilling rig |
| CN110329936A (en) * | 2019-06-27 | 2019-10-15 | 三一重机有限公司 | Tension structure, static pressure board-plugging device wirerope elevator structure and static pressure board-plugging device |
| CN110173483A (en) * | 2019-06-28 | 2019-08-27 | 北京三一智造科技有限公司 | Hydraulic system and rotary drilling rig |
| CN110173483B (en) * | 2019-06-28 | 2024-01-23 | 北京三一智造科技有限公司 | Hydraulic system and rotary drilling rig |
| CN111577715A (en) * | 2020-05-31 | 2020-08-25 | 北京三一智造科技有限公司 | Winch tension control device, rotary drilling rig and winch tension control method |
| CN114620631A (en) * | 2022-05-12 | 2022-06-14 | 徐州徐工基础工程机械有限公司 | Steel wire rope protection control system and method for rotary drilling rig |
| CN114620631B (en) * | 2022-05-12 | 2022-07-22 | 徐州徐工基础工程机械有限公司 | Steel wire rope protection control system and method for rotary drilling rig |
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