Safety control type drilling machine and control method thereof

Abstract

The invention relates to the technical field of anchor rod drilling machines, and discloses a safety control type drilling machine and a control method thereof.The safety control type drilling machine comprises a seat ring, an inner ring and an outer gear ring, the inner ring and the outer gear ring are connected into the seat ring and rotationally connected in a sleeved mode, and the outer gear ring is rotationally connected with the seat ring; the seat ring is rotationally connected with a left worm and a right worm which are meshed with the outer gear ring, the left worm and the right worm are symmetrically arranged left and right along the seat ring, the left worm is connected with a left hydraulic motor, the right worm is connected with a right hydraulic motor, and the left hydraulic motor and the right hydraulic motor are each provided with a liquid inlet end and a liquid outlet end; the seat ring is connected with an oil way switching valve, the oil way switching valve is connected with a first hydraulic pipe and a second hydraulic pipe, the liquid inlet end of the left hydraulic motor and the liquid outlet end of the right hydraulic motor are communicated with the first hydraulic pipe, and the liquid outlet end of the left hydraulic motor and the liquid inlet end of the right hydraulic motor are communicated with the second hydraulic pipe. The anchor rod drilling machine solves the problem that in the prior art, safety is prone to occurring in the using process of the anchor rod drilling machine.

Description

Technical Field

[0001] The invention relates to the technical field of anchor drilling rigs, and in particular to a safety-controlled drilling rig and a control method thereof. Background Art

[0002] As a special type of drilling equipment, anchor drilling rigs are mainly used in earthwork engineering, tunnel engineering, geotechnical engineering, etc. The structure of anchor drilling rigs mostly includes the main body of the drilling rig (foundation, rotating head, control center, anchor support arm, etc.), cleaning components (including wind bars, pumps, compressors, etc.), drill rods, drill bits, etc. At present, the structure of the anchor drilling rig mainly includes crawler chassis, lower rotating mechanism, lower outrigger, lower operating mechanism, counterweight structure, lower luffing mechanism, boom, upper luffing mechanism, upper rotating mechanism, upper operating mechanism and power head propulsion mechanism. When working, the lower luffing mechanism and the boom are used to adjust the height position of the upper rotating mechanism, and then the upper luffing mechanism and the upper rotating mechanism are used to adjust the angle position of the anchor, and finally the power head propulsion mechanism is used to drive the anchor drilling.

[0003] The existing upper rotating mechanism is mainly composed of a rotating support structure, and the internal structure mainly includes an upper rotating platform, a seat ring, an inner ring, an outer gear ring and a power device, wherein the upper rotating platform is rotatably connected to the upper variable amplitude mechanism, the seat ring and the inner ring are fixedly connected to the upper rotating platform, the outer gear ring is coaxially rotatably connected to the seat ring and the inner ring, the upper operating mechanism is connected to the outer gear ring, and rollers are provided between the outer gear ring and the seat ring, and between the outer gear ring and the inner ring, so that the entire upper rotating mechanism can also withstand the gravity of the upper operating mechanism when rotating. The power device is mainly used to drive the outer gear ring to rotate relative to the seat ring and the inner ring, so as to adjust the angle of the anchor rod. The existing power device is mainly composed of a driver and a worm connected to each other, and the worm is meshed with the teeth provided on the outer wall of the outer gear ring. The driver generally adopts a hydraulic motor. When the hydraulic motor rotates in different directions, the outer gear ring can be used to drive the entire upper operating mechanism and the anchor rod to rotate.

[0004] Although the existing driving equipment can drive the upper operating mechanism and anchor rods to rotate, in actual use, since only a drive and a worm are provided on the seat ring to drive the outer gear ring to rotate, during the use project, if the worm gear becomes abnormal or damaged, the outer gear ring will be suspended and rotate freely. At this time, since the upper operating mechanism is at a high height from the ground and there are construction personnel on the upper operating mechanism, when the outer gear ring is suspended and rotates freely, it will pose a great threat to the safety of the construction personnel in the upper operating mechanism. Therefore, it is necessary to improve the existing power equipment to improve the safety of the anchor rod drilling construction process. Summary of the invention

[0005] The present invention aims to provide a safety-controlled drilling rig and a control method thereof, so as to solve the safety problems that are prone to occur during the use of the anchor drilling rig in the prior art.

[0006] To solve the above problems, the present invention adopts the following technical scheme: a safety-controlled drilling rig, comprising a seat ring and an inner ring and an outer gear ring connected to the seat ring and rotatably connected to each other, the outer gear ring being rotatably connected to the seat ring, the inner ring being fixedly connected to the seat ring, a left worm and a right worm being rotatably connected to the seat ring and meshing with the outer gear ring, the left worm and the right worm being symmetrically arranged along the seat ring, a left hydraulic motor being connected to the left worm, a right hydraulic motor being connected to the right worm, and a liquid inlet end and a liquid outlet end being provided on both the left hydraulic motor and the right hydraulic motor; an oil circuit switching valve being connected to the seat ring, a first hydraulic pipe and a second hydraulic pipe being connected to the oil circuit switching valve, the liquid inlet end of the left hydraulic motor and the liquid outlet end of the right hydraulic motor being connected to the first hydraulic pipe, and the liquid outlet end of the left hydraulic motor and the liquid inlet end of the right hydraulic motor being connected to the second hydraulic pipe.

[0007] The principle and beneficial effects of the present scheme are as follows: in the present application, the left worm and the right worm are connected by rotating on the seat ring, and the left worm and the right worm are symmetrically arranged along the left and right sides of the seat ring. During use, the left worm and the right worm can both drive the outer gear ring to rotate, and the outer gear ring is subjected to symmetrical forces during the process of driving the outer gear ring to rotate, thereby increasing the stability during operation; at the same time; when any one of the left worm and the right worm fails or is damaged, the left worm and the right worm can block the outer gear ring from two directions, thereby realizing self-locking of the outer gear ring, preventing the outer gear ring from rotating at will, and improving the safety of the upper operating mechanism.

[0008] In addition, in the present application, an oil circuit switching valve is provided, and the first hydraulic pipe and the second hydraulic pipe are connected to the oil circuit switching valve, and the first hydraulic pipe and the second hydraulic pipe are used to supply and drain the left hydraulic motor and the right hydraulic motor, so that the first hydraulic pipe, the left hydraulic motor, the oil hydraulic motor, and the second hydraulic pipe form a connection loop, and the liquid inlet end of the left hydraulic motor and the liquid outlet end of the right hydraulic motor are connected to the first hydraulic pipe, and the liquid outlet end of the left hydraulic motor and the liquid inlet end of the right hydraulic motor are connected to the second hydraulic pipe, that is, the liquid supply direction of the left hydraulic motor and the right hydraulic motor is always in opposite rotation, so during use, the left worm and the right worm are always in the state of opposite rotation direction, thereby driving the outer gear ring to rotate normally and stably. When the oil circuit switching valve switches to the liquid supply direction of the first hydraulic pipe and the second hydraulic pipe, the outer gear ring can be rotated in different directions, and finally the position of the entire upper operating mechanism in the prior art is adjusted, and the structure is simple and easy to control.

[0009] At the same time, in the present application, since the liquid inlet end of the left hydraulic motor and the liquid outlet end of the right hydraulic motor are connected to the first hydraulic pipe, and the liquid outlet end of the left hydraulic motor and the liquid inlet end of the right hydraulic motor are connected to the second hydraulic pipe, when designing the oil supply pipeline, the left hydraulic motor and the right hydraulic motor are located on the same side of the seat ring. Compared with setting the left hydraulic motor and the right hydraulic motor on different sides of the seat ring respectively, the distance between the left hydraulic motor and the right hydraulic motor in the present application is closer, and the first hydraulic pipe and the second hydraulic pipe can be conveniently arranged, while effectively reducing the total length of the first hydraulic pipe and the second hydraulic pipe, effectively reducing the cost; more importantly, the left hydraulic motor and the right hydraulic motor are set on the same side of the seat ring. When setting the first hydraulic pipe and the second hydraulic pipe, the length of the liquid supply pipeline and the return pipeline connected to the left hydraulic motor and the right hydraulic motor can be conveniently controlled to be the same, so that in the process of supplying liquid using the oil circuit switching valve, the left hydraulic motor and the right hydraulic motor can work synchronously, and the hydraulic pressure of the entire liquid circuit is more uniform and stable, further improving the stability of the rotation of the outer gear ring and the stability of the entire system.

[0010] Preferably, as an improvement, the first hydraulic pipe is connected to a first hydraulic sensor, the second hydraulic pipe is connected to a second hydraulic sensor, the seat ring is connected to an alarm and a controller, and the controller is electrically connected to the first hydraulic sensor, the second hydraulic sensor and the alarm at the same time.

[0011] In this solution, when the left worm and / or the right worm fails or is damaged, the pressure in the first hydraulic pipe and / or the second hydraulic pipe will increase. The first hydraulic sensor and the second hydraulic sensor are used to detect the pressure in the first hydraulic pipe and the second hydraulic pipe respectively. When the left worm and / or the right worm fails or is damaged, the corresponding hydraulic sensor can quickly detect the abnormal signal. After receiving the abnormal signal, the controller controls the alarm to stop the operation and troubleshoot.

[0012] Preferably, as an improvement, the seat ring is connected with a braking mechanism for preventing the outer gear ring from rotating, a sliding cavity is provided on the seat ring, the braking mechanism is slidably connected in the sliding cavity, and a driving mechanism is provided on the seat ring for driving the braking mechanism to slide along the sliding cavity.

[0013] In the present scheme, a driving mechanism is utilized to drive the braking mechanism to slide in the sliding cavity. When the left worm and the right worm are in normal use, the braking mechanism is away from the outer gear ring, and the outer gear ring can rotate normally at this time. When the left worm and / or the right worm fails, the driving mechanism drives the braking mechanism to slide to a state connected with the outer gear ring, and the braking mechanism is utilized to prevent the outer gear ring from continuing to rotate. Combined with the self-locking function of the left and right worms on the outer gear ring, the outer gear ring can be braked stably, thereby further improving safety. At the same time, in the present scheme, since a braking mechanism is added, when a mechanical failure occurs, the braking effect of the braking mechanism on the outer gear ring can effectively reduce the gravity of the upper operating mechanism, the power head propulsion mechanism and the user on the left and right worms in the prior art, thereby providing auxiliary protection for the left and right worms.

[0014] Preferably, as an improvement, the braking mechanism comprises a sliding seat and an elastic reset member, the sliding seat is provided with braking teeth meshing with the outer gear ring, and the elastic reset member is connected between the seat ring and the sliding seat.

[0015] In this solution, a brake tooth is provided on the slide seat. When the outer gear ring needs to be braked, it is only necessary to push the slide seat close to the outer gear ring so that the brake tooth engages with the teeth on the outer gear ring. The slide seat can be used to brake the outer gear ring. The structure is simple and the slide seat structure can withstand a large force, thereby effectively braking the outer gear ring.

[0016] Preferably, as an improvement, the slide seat is provided with a liquid inlet and a liquid outlet connected to the sliding chamber, the driving mechanism includes a first pressure relief pipe, a second pressure relief pipe and a drain pipe, the first pressure relief pipe is connected between the liquid inlet and the first hydraulic pipe, the second pressure relief pipe is connected between the liquid inlet and the second hydraulic pipe, the drain pipe is connected to the liquid outlet, a switch valve electrically connected to the controller is connected to the drain pipe, and overflow valves are fixedly connected to the first pressure relief pipe and the second pressure relief pipe.

[0017] In the present solution, the driving mechanism includes a first pressure relief pipe, a second pressure relief pipe and a drain pipe. The first pressure relief pipe is connected between the liquid inlet and the first hydraulic pipe, and the second pressure relief pipe is connected between the liquid inlet and the second hydraulic pipe. When the left worm and / or the right worm fails or is damaged, the internal hydraulic pressure of the first hydraulic pipe and / or the second hydraulic pipe will increase significantly. When the pressure exceeds the overflow pressure of the overflow valve, the high-pressure oil in the first pressure relief pipe and / or the second hydraulic pipe will pass through the first pressure relief pipe and / or the second pressure relief pipe and flow into the sliding cavity through the liquid inlet. The braking mechanism approaches and brakes the outer gear ring under the pressure of the oil pressure. When the fault is eliminated, the switch valve is controlled to open by the controller to discharge the hydraulic oil in the sliding cavity, and the elastic reset member in the braking mechanism drives the braking mechanism to disengage from the outer gear ring.

[0018] In this solution, the braking mechanism is directly connected to the first hydraulic pipe and the second hydraulic pipe. When the left worm gear and / or the right worm gear fails or is damaged, the pressure in the first hydraulic pipe and / or the second hydraulic pipe increases significantly. On the one hand, the hydraulic sensor on the corresponding pipeline can quickly detect the hydraulic abnormality and alarm. On the other hand, by setting an overflow valve, when the pressure in the first hydraulic pipe and / or the second hydraulic pipe increases to a certain level, the pressure is automatically released to avoid pipe burst due to excessive pressure, thereby reducing safety risks. In addition, the overflowing high-pressure oil flows into the sliding cavity, automatically pushing the braking mechanism to brake the outer gear ring. The braking can be automatically completed without additional detection and control, thereby effectively improving the braking effect of the outer gear ring.

[0019] Preferably, as an improvement, the first pressure relief pipe and the second pressure relief pipe are both fixedly connected with a one-way valve, and the one-way valve is located between the overflow valve and the liquid inlet.

[0020] In this solution, by fixing one-way valves on both the first pressure relief pipe and the second pressure relief pipe, mutual influence between the high-pressure oil in the first pressure relief pipe and the second pressure relief pipe is avoided, so that the operation of the overflow valve is more stable and the entire oil circuit system is also more stable.

[0021] Preferably, as an improvement, the sliding seat is slidably connected with an adjustment seat along the tangential direction of the outer gear ring on one side of the sliding seat facing the outer gear ring, the braking tooth is arranged on the adjustment seat, and an elastic support member is connected between the adjustment seat and the sliding seat.

[0022] In this solution, an adjustment seat is arranged on the sliding seat, and the adjustment seat slides along the tangential direction of the outer gear ring. Therefore, when the sliding seat is pushed close to the outer gear ring by the overflowing high-pressure oil, even if the brake teeth and the teeth on the outer side of the outer gear ring are not in a state of mutual meshing, the adjustment seat can be pushed to slide relative to the sliding seat when subjected to the squeezing force of the outer gear ring, so that the brake teeth automatically mesh with the teeth of the outer gear ring, thereby avoiding violent collision between the brake teeth and the outer gear ring, thereby protecting both the brake teeth and the outer gear ring.

[0023] Preferably, as an improvement, a sliding hole is opened on the sliding seat, and a guide rod that slides with the sliding hole is fixedly connected to the adjusting seat, and the elastic support member includes a left support spring and a right support spring that are sleeved on the guide rod, and the adjusting seat is located between the left support spring and the right support spring.

[0024] In this solution, the cooperation of the guide rod and the sliding hole makes the sliding of the adjustment seat relative to the sliding seat smoother, and after the adjustment seat slides to engage with the outer gear ring, the setting of the guide rod can withstand a larger force, so that the adjustment seat can have a good braking effect on the outer gear ring; at the same time, the elastic support member in this solution includes a left support spring and a right support spring, so that the left and right sides of the adjustment seat can be elastically supported, and the adjustment seat and the outer gear ring can form a good engagement when the corresponding outer gear ring rotates in different directions.

[0025] Preferably, as an improvement, the first hydraulic pipe is connected to a first flow regulating valve, and the second hydraulic pipe is connected to a second flow regulating valve.

[0026] In this solution, a first flow regulating valve is connected to the first hydraulic pipe, and a second flow regulating valve is connected to the second hydraulic pipe. The flow regulating valve is used to adjust the oil supply speed, so that the speed of the corresponding hydraulic motor is adjusted, and finally the speed of the outer ring gear is adjusted, so that the speed of the upper operating mechanism in the prior art is adjusted.

[0027] A control method for a safety-controlled drilling rig, comprising the safety-controlled drilling rig, wherein the control method is as follows: In normal use, the first hydraulic pipe connected to the oil circuit switching valve is used to supply or drain liquid to the liquid inlet end of the left hydraulic motor and the liquid outlet end of the right hydraulic motor, and the second hydraulic pipe is used to supply or drain liquid to the liquid outlet end of the left hydraulic motor and the liquid inlet end of the right hydraulic motor. The oil circuit switching valve is used to control the liquid inlet or drain of the first hydraulic pipe and the second hydraulic pipe, thereby controlling the forward or reverse rotation of the left worm and the right worm, and controlling the forward or reverse rotation of the outer gear ring; When the left worm and / or the right worm is abnormal, the left worm and the right worm cooperate to lock the outer gear ring, the pressure in the first hydraulic pipe and / or the second hydraulic pipe increases, the first hydraulic sensor and / or the second hydraulic sensor detects a high-pressure signal, and the controller controls the alarm to sound after receiving the high-pressure signal; at the same time, the overflow valve on the first hydraulic pipe and / or the second hydraulic pipe opens, and the high-pressure oil in the first hydraulic pipe and / or the second hydraulic pipe enters the sliding chamber, and the brake mechanism slides to a meshing state with the outer gear ring under the action of the high-pressure oil in the sliding chamber, and the brake mechanism brakes the outer gear ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of Embodiment 1 of the present invention.

[0029] Figure 2 It is a schematic diagram of an upward viewing angle of an embodiment of the present invention.

[0030] Figure 3 It is a top sectional view along the plane where the axes of the left worm and the right worm are located according to the first embodiment of the present invention.

[0031] Figure 4 for Figure 3 A partial enlarged view of position A in the middle.

[0032] Figure 5 This is a schematic diagram of the liquid circuit control system in Example 1 of the present invention.

[0033] Figure 6 The same as in the second embodiment of the present invention Figure 3 A partial enlarged view of position A in the middle.

[0034] Figure 7 This is a schematic diagram of the liquid circuit control system in Example 3 of the present invention. DETAILED DESCRIPTION

[0035] The following is further described in detail through specific implementation methods: The figure marks in the drawings of the specification include: lower support seat 1, upper rotating seat 2, seat ring 3, sliding chamber 301, inner ring 4, outer gear ring 5, mounting seat 6, left worm 7, right worm 8, left hydraulic motor 9, right hydraulic motor 10, oil circuit switching valve 11, first hydraulic pipe 12, second hydraulic pipe 13, first hydraulic sensor 14, second hydraulic sensor 15, alarm 16, controller 17, slide seat 18, brake tooth 19, return spring 20, first pressure relief pipe 21, second pressure relief pipe 22, drain pipe 23, switch valve 24, overflow valve 25, one-way valve 26, adjustment seat 27, guide rod 28, left support spring 29, right support spring 30.

[0036] Embodiment 1 This embodiment is as shown in the attached Figure 1 and Figure 2 As shown: A safety control drilling rig includes a lower support seat 1 and an upper rotating seat 2, combined with Figure 3 The lower support seat 1 is welded with a disc-shaped seat ring 3, and the seat ring 3 is coaxially provided with an inner ring 4 and an outer gear ring 5 which are mutually sleeved, the inner ring 4 is located in the outer gear ring 5, and the inner gear ring is fixedly connected to the lower support seat 1 by bolts, and the upper rotating seat 2 is fixedly connected to the top of the outer gear ring 5 by bolts; at the same time, in this embodiment, rollers are arranged between the outer gear ring 5 and the inner ring 4, and between the outer gear ring 5 and the seat ring 3, so that the outer gear ring 5 can stably rotate relative to the seat ring 3 and the inner ring 4. Since the arrangement of rollers belongs to the prior art, the structural form of the rollers will not be repeated here.

[0037] Combination Figure 1 and Figure 3 A mounting seat 6 is integrally formed on the outer side of the seat ring 3. There are two mounting seats 6 and the two mounting seats 6 are symmetrically arranged along the seat ring 3. The left mounting seat 6 is rotatably connected to the left worm 7 through a bearing, and the right mounting seat 6 is rotatably connected to the right worm 8 through a bearing. The left worm 7 and the right worm 8 are also symmetrically arranged relative to the seat ring 3. The left worm 7 and the right worm 8 are both meshed with the teeth on the outer side of the outer gear ring 5. When in use, the left worm 7 and the right worm 8 rotate in opposite directions at the same time, which can drive the outer gear ring 5 to rotate and make the upper rotating seat 2 connected to the top of the outer gear ring 5 rotate.

[0038] like Figure 1As shown, the left worm 7 is fixedly connected to a left hydraulic motor 9 by bolts, and the right worm 8 is fixedly connected to a right hydraulic motor 10 by bolts. The left hydraulic motor 9 and the right hydraulic motor 10 are located on the same side of the seat ring 3; at the same time, combined with Figure 3 and Figure 4 The seat ring 3 is fixedly connected with an oil circuit switching valve 11 by screws. The oil circuit switching valve 11 adopts a three-position four-way electro-hydraulic reversing valve, which uses an electromagnetic reversing valve as a pilot to control the flow direction of the liquid. The oil circuit switching valve 11 is connected to a first hydraulic pipe 12 and a second hydraulic pipe 13. The inlet end of the left hydraulic motor 9 and the outlet end of the right hydraulic motor 10 are connected to the first hydraulic pipe 12, and the outlet end of the left hydraulic motor 9 and the inlet end of the right hydraulic motor 10 are connected to the second hydraulic pipe 13. For example, the oil circuit switching valve 11 is used to input hydraulic oil into the first hydraulic pipe 12, and the second hydraulic pipe 13 is controlled to return oil. In this process, the left worm 7 and the right worm 8 rotate in opposite directions, and under the driving action of the left worm 7 and the right worm 8, the outer gear ring 5 rotates in one direction (for example, clockwise); when the oil circuit switching valve 11 switches the oil supply direction, the second hydraulic pipe 13 serves as the oil supply pipe and the first hydraulic pipe 12 serves as the oil return pipe. At this time, the outer gear ring 5 rotates in another direction (for example, counterclockwise), so the oil circuit switching valve 11 is used to control the rotation direction of the outer gear ring 5.

[0039] In this embodiment, combined with Figure 1 , Figure 2 , Figure 3 and Figure 5 A first hydraulic sensor 14 is fixedly mounted on the first hydraulic pipe 12, a second hydraulic sensor 15 is fixedly mounted on the second hydraulic pipe 13, an alarm 16 and a controller 17 are fixedly connected to the seat ring 3 by screws (of course, the controller 17 can also be arranged in the control room of the anchor drilling rig of the prior art), the controller 17 is electrically connected to the first hydraulic sensor 14, the second hydraulic sensor 15 and the alarm 16 at the same time, the first hydraulic sensor 14 is used to monitor the oil pressure in the first hydraulic pipe 12, and the second hydraulic sensor 15 is used to monitor the oil pressure in the second hydraulic pipe 13, when the first hydraulic sensor 14 or the second hydraulic sensor 15 detects a high pressure signal, the controller 17 controls the alarm 16 to alarm after receiving the high pressure signal, thereby reminding the construction personnel of the equipment failure. The alarm 16 can be a combination of sound and alarm light, and it is a conventional technology that the controller 17 is not used to receive the detection signal of the hydraulic sensor and control the alarm 16 to alarm, and its principle and detailed structure are not repeated here.

[0040] Combination Figure 3 and Figure 4, a brake mechanism for preventing the outer gear ring 5 from rotating is connected to the seat ring 3, a sliding cavity 301 is provided on the seat ring 3, the brake mechanism is slidably connected to the sliding cavity 301, and a driving mechanism for driving the brake mechanism to slide along the sliding cavity 301 is provided on the seat ring 3. In this embodiment, the brake mechanism includes a slide 18 and an elastic reset member, the slide 18 is provided with a brake tooth 19 meshing with the outer gear ring 5, the elastic reset member is a reset spring 20, and the reset spring 20 is located between the slide 18 and the seat ring 3. When the slide 18 is not subjected to external force, the slide 18 is in a state of being away from the outer gear ring 5 without braking; the slide 18 is provided with a liquid inlet and a liquid outlet connected to the sliding cavity 301, and the driving mechanism includes a first pressure relief pipe 21, a second pressure relief pipe 22 and a liquid discharge pipe 23, and the first pressure relief pipe 21 is connected to the liquid inlet and the first pressure relief pipe 22. The hydraulic pipe 12 is connected to the second pressure relief pipe 22, which is connected between the liquid inlet and the second hydraulic pipe 13. The discharge pipe 23 is connected to the liquid outlet. The discharge pipe 23 is connected to a switch valve 24 electrically connected to the controller 17. The first pressure relief pipe 21 and the second pressure relief pipe 22 are both fixedly connected to an overflow valve 25. At the same time, in order to avoid mutual influence of the oil pressure between the first pressure relief pipe 21 and the second pressure relief pipe 22, a one-way valve 26 is fixedly connected to the first pressure relief pipe 21 and the second pressure relief pipe 22, and the one-way valve 26 is located between the overflow valve 25 and the liquid inlet.

[0041] In this embodiment, since the left worm 7 and the right worm 8 are connected to the seat ring 3, the left worm 7 and the right worm 8 are used to drive the outer gear ring 5 to rotate, and the left worm 7 and the right worm 8 are symmetrically arranged relative to the seat ring 3, the stability of the driving of the outer gear ring 5 is effectively improved, so that the outer gear ring 5 rotates more smoothly; at the same time, since the left hydraulic motor 9 and the right hydraulic motor 10 are located on the same side of the seat ring 3, the two are arranged close to each other, so that when the first hydraulic pipe 12 and the second hydraulic pipe 13 are set, the first hydraulic pipe 12 and the second hydraulic pipe 13 are controlled. 2 and the second hydraulic cylinder are close in length and have a shorter total length, which is not only conducive to reducing the cost of pipelines, but also can ensure the synchronization of the driving of the left worm 7 and the right worm 8, thereby improving the stability of the driving of the outer ring gear 5; in addition, in this embodiment, since the left worm 7 and the right worm 8 are provided, the self-locking characteristics of the worm are utilized. When any of the left worm 7 and the right worm 8 fails or is damaged, the outer ring gear 5 can be locked under the joint action of the left worm 7 and the right worm 8, thereby avoiding the dangerous situation of the outer ring gear 5 being suspended and rotating at will.

[0042] In addition, in the present embodiment, when any of the left worm 7 and the right worm 8 fails or is damaged, for example, when the left worm 7 fails or is abnormal, the oil pressure in the first hydraulic pipe 12 rises significantly, and the first hydraulic sensor 14 detects a high pressure signal at this time. The controller 17 receives the high pressure signal and controls the alarm 16 to sound an alarm. At the same time, when the pressure in the first hydraulic pipe 12 and / or the second hydraulic pipe 13 rises to the overflow pressure of the overflow pipe, the overflow valve 25 opens, so that the high pressure oil flows from the first pressure relief pipe 21 and / or the second pressure relief pipe 22 into the sliding chamber 301 through the liquid inlet. Under the action of the high pressure oil, the slide 18 slides relative to the seat ring 3 and approaches the outer gear ring 5, so that the brake teeth 19 on the slide 18 mesh with the teeth on the outer gear ring 5. The slide 18 is used to brake the outer gear ring 5. Combined with the resistance of the left worm 7 and the right worm 8 to the outer gear ring 5, the outer gear ring 5 can stably stop rotating when the equipment fails, thereby ensuring the safety of the equipment and construction personnel.

[0043] A safety control drilling rig, comprising the above-mentioned safety control drilling rig, wherein the control method thereof is as follows: In normal use, the first hydraulic pipe 12 connected to the oil circuit switching valve 11 is used to supply or drain liquid to the liquid inlet end of the left hydraulic motor 9 and the liquid outlet end of the right hydraulic motor 10, and the second hydraulic pipe 13 is used to supply or drain liquid to the liquid outlet end of the left hydraulic motor 9 and the liquid inlet end of the right hydraulic motor 10. The oil circuit switching valve 11 is used to control the liquid inlet or liquid discharge of the first hydraulic pipe 12 and the second hydraulic pipe 13. For example, when the first hydraulic pipe 12 is filled with liquid and the second hydraulic pipe 13 is draining oil, the outer gear ring 5 rotates clockwise (of course, it can also rotate counterclockwise) under the common driving force of the left worm 7 and the right worm 8, and when the rotation direction of the outer gear ring 5 needs to be switched, it is only necessary to switch the oil supply direction of the oil circuit switching valve 11 to drive the outer gear ring 5 to rotate in the opposite direction.

[0044] When the left worm 7 and / or the right worm 8 are abnormal, the left worm 7 and the right worm 8 cooperate to lock the outer gear ring 5, the pressure in the first hydraulic pipe 12 and / or the second hydraulic pipe 13 increases, the first hydraulic sensor 14 and / or the second hydraulic sensor 15 detects a high-pressure signal, and the controller 17 controls the alarm 16 to sound an alarm after receiving the high-pressure signal; at the same time, the overflow valve 25 on the first hydraulic pipe 12 and / or the second hydraulic pipe 13 opens, and the high-pressure oil in the first hydraulic pipe 12 and / or the second hydraulic pipe 13 enters the sliding chamber 301, and the brake mechanism slides to a meshing state with the outer gear ring 5 under the action of the high-pressure oil in the sliding chamber 301, and the brake mechanism brakes the outer gear ring 5.

[0045] Embodiment 2 The difference between the second embodiment and the first embodiment is that: Figure 6As shown, an adjustment seat 27 is slidably connected to the side of the slide seat 18 facing the outer gear ring 5 along the tangent direction of the outer gear ring 5, the brake tooth 19 is arranged on the adjustment seat 27, and an elastic support member is connected between the adjustment seat 27 and the slide seat 18. Specifically, a receiving groove is formed on the slide seat 18, and a sliding hole is formed on the side wall of the receiving groove along the tangent direction of the outer gear ring 5. A guide rod 28 that slidably cooperates with the sliding hole is fixedly connected to the adjustment seat 27 by welding or screws. There are two guide rods 28. The elastic support member includes a left support spring 29 and a right support spring 30 sleeved on the guide column. The adjustment seat 27 is located between the left support spring 29 and the right support spring 30, so that both sides of the adjustment seat 27 can be supported by elastic force.

[0046] In this embodiment, an adjustment seat 27 is slidably arranged on the slide 18. When the left worm 7 and / or the right worm 8 fails or is damaged and the outer gear ring 5 is locked, when the slide 18 approaches the outer gear ring 5 under the action of the high-pressure oil in the sliding chamber 301, the brake teeth 19 may not be in a state of being directly facing and meshing with the teeth on the outer gear ring 5. At this time, when the brake teeth 19 are close to and mesh with the teeth on the outer gear ring 5, it is easy to cause wear of the brake teeth 19 and the teeth on the outer gear ring 5. In this embodiment, the adjustment seat 27 is slidably connected to the slide 18. Therefore, even if the aforementioned brake teeth 19 are not in a state of being directly facing and meshing with the teeth on the outer gear ring 5, when the adjustment seat 27 contacts the outer gear ring 5 and is squeezed, the adjustment seat 27 can automatically slide relative to the slide 18 to make the brake teeth 19 mesh with the teeth on the outer gear ring 5, thereby reducing the situation of violent collision and damage between the brake teeth 19 and the teeth of the outer gear ring 5, and playing a good protective role for the brake teeth 19 and the teeth of the outer gear ring 5. Of course, in order for the adjustment seat 27 and the slide seat 18 to effectively brake the outer gear ring 5, the distance of the lateral unidirectional sliding of the adjustment seat 27 relative to the slide seat 18 is greater than or equal to half of the tooth pitch on the outer gear ring 5 and less than the tooth pitch on the outer gear ring 5.

[0047] Embodiment 3 The difference between the third embodiment and the second embodiment is that: Figure 7 As shown, in this embodiment, a first flow regulating valve is installed and connected on the first hydraulic pipe 12, and a second flow regulating valve is installed and connected on the second hydraulic pipe 13, and the first flow regulating valve and the second flow regulating valve are integrated with the one-way valve 26. A one-way throttle valve (i.e., a first one-way throttle valve and a second one-way throttle valve) is used to adjust the oil flow rate of the oil circuit system through the first flow regulating valve and the second flow regulating valve, thereby controlling the rotation speed of the left worm 7 and the right worm 8, and finally adjusting the rotation speed of the outer gear ring 5 during use.

[0048] The above is only an embodiment of the present invention, and the common knowledge such as the known specific technical solutions and / or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A safety control drilling rig, comprising a seat ring and an inner ring and an outer gear ring connected to the seat ring and rotatably connected to each other, the outer gear ring is rotatably connected to the seat ring, and the inner ring is fixedly connected to the seat ring, characterized in that: The seat ring is rotatably connected with a left worm and a right worm meshing with the outer gear ring. The left worm and the right worm are symmetrically arranged along the seat ring. The left worm is connected with a left hydraulic motor, and the right worm is connected with a right hydraulic motor. Both the left hydraulic motor and the right hydraulic motor are provided with a liquid inlet and a liquid outlet. The seat ring is connected with an oil circuit switching valve, and the oil circuit switching valve is connected with a first hydraulic pipe and a second hydraulic pipe. The liquid inlet of the left hydraulic motor and the liquid outlet of the right hydraulic motor are connected to the first hydraulic pipe, and the liquid outlet of the left hydraulic motor and the liquid inlet of the right hydraulic motor are connected to the second hydraulic pipe.

2. A safety-controlled drilling rig according to claim 1, characterized in that: The first hydraulic pipe is connected to a first hydraulic sensor, the second hydraulic pipe is connected to a second hydraulic sensor, the seat ring is connected to an alarm and a controller, and the controller is electrically connected to the first hydraulic sensor, the second hydraulic sensor and the alarm at the same time.

3. A safety-controlled drilling rig according to claim 2, characterized in that: The seat ring is connected with a brake mechanism for preventing the outer gear ring from rotating. The seat ring is provided with a sliding cavity in which the brake mechanism is slidably connected. The seat ring is provided with a driving mechanism for driving the brake mechanism to slide along the sliding cavity.

4. A safety-controlled drilling rig according to claim 3, characterized in that: The brake mechanism comprises a sliding seat and an elastic reset member. The sliding seat is provided with brake teeth meshing with the outer gear ring. The elastic reset member is connected between the seat ring and the sliding seat.

5. A safety-controlled drilling rig according to claim 4, characterized in that: The slide seat is provided with a liquid inlet and a liquid outlet connected to the sliding cavity, and the driving mechanism includes a first pressure relief pipe, a second pressure relief pipe and a drain pipe, the first pressure relief pipe is connected between the liquid inlet and the first hydraulic pipe, the second pressure relief pipe is connected between the liquid inlet and the second hydraulic pipe, the drain pipe is connected to the liquid outlet, a switch valve electrically connected to the controller is connected to the drain pipe, and overflow valves are fixedly connected to the first pressure relief pipe and the second pressure relief pipe.

6. A safety-controlled drilling rig according to claim 5, characterized in that: The first pressure relief pipe and the second pressure relief pipe are both fixedly connected with a one-way valve, and the one-way valve is located between the overflow valve and the liquid inlet.

7. A safety-controlled drilling rig according to claim 6, characterized in that: The side of the slide seat facing the outer gear ring is slidably connected with an adjustment seat along the tangent direction of the outer gear ring. The brake teeth are arranged on the adjustment seat. An elastic support member is connected between the adjustment seat and the slide seat.

8. A safety-controlled drilling rig according to claim 7, characterized in that: The sliding seat is provided with a sliding hole, the adjusting seat is fixedly connected with a guide rod which slides with the sliding hole, the elastic support member comprises a left support spring and a right support spring which are sleeved on the guide rod, and the adjusting seat is located between the left support spring and the right support spring.

9. A safety-controlled drilling rig according to claim 4, characterized in that: It also includes a base, the first hydraulic pipe is connected to a first flow regulating valve, and the second hydraulic pipe is connected to a second flow regulating valve.

10. A control method for a safety-controlled drilling rig, characterized in that: A safety-controlled drilling rig comprising any one of claims 4 to 9, wherein the control method is as follows: In normal use, the first hydraulic pipe connected to the oil circuit switching valve is used to supply or drain liquid to the liquid inlet end of the left hydraulic motor and the liquid outlet end of the right hydraulic motor, and the second hydraulic pipe is used to supply or drain liquid to the liquid outlet end of the left hydraulic motor and the liquid inlet end of the right hydraulic motor. The oil circuit switching valve is used to control the liquid inlet or drain of the first hydraulic pipe and the second hydraulic pipe, thereby controlling the forward or reverse rotation of the left worm and the right worm, and controlling the forward or reverse rotation of the outer gear ring; When the left worm and / or the right worm is abnormal, the left worm and the right worm cooperate to lock the outer gear ring, the pressure in the first hydraulic pipe and / or the second hydraulic pipe increases, the first hydraulic sensor and / or the second hydraulic sensor detects a high-pressure signal, and the controller controls the alarm to sound after receiving the high-pressure signal; at the same time, the overflow valve on the first hydraulic pipe and / or the second hydraulic pipe opens, and the high-pressure oil in the first hydraulic pipe and / or the second hydraulic pipe enters the sliding chamber, and the brake mechanism slides to a meshing state with the outer gear ring under the action of the high-pressure oil in the sliding chamber, and the brake mechanism brakes the outer gear ring.

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