Linkage control system and control method for water exploring drilling machine of normally-open type clamp holder

Abstract

The invention belongs to the technical field of hydraulic transmission and control. In order to solve the problem that due to the fact that an existing normally-open type clamp does not have normally-closed kinetic energy, a water exploring drilling machine has the risk of rod sliding in the working condition of obliquely upward drilling, the water exploring drilling machine linkage control system of the normally-open type clamp and the control method are provided, and the control system comprises the clamp, a chuck, a motor and a feeding oil cylinder. The clamping device further comprises a first electromagnetic reversing valve, a second electromagnetic reversing valve, a clamp holder normally-closed valve set and a hydraulic pump station, a feeding and retracting switching control oil way and a forward rotation and reverse rotation switching control oil way are formed in the clamping device, and the clamp holder normally-closed valve set communicates with the feeding and retracting switching control oil way to achieve clamping and loosening of the clamp holder. Normally-closed control over the normally-open type clamp holder is achieved, rod sliding is avoided when inclined holes are drilled upwards, oil can flow into the clamp holder and the chuck by controlling the state of the feeding oil cylinder to control the different states of the clamp holder and the chuck, drilling, rod adding, rod collecting and rod disassembling of the drilling machine are achieved, and operation convenience is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of hydraulic transmission and control, and in particular relates to a linkage control system and a control method for a water exploration drilling rig of a normally open clamp. Background Art

[0002] The current clamps of water exploration drilling rigs are divided into normally closed and normally open types. The normally closed type is that the clamp is in a normally closed state under the action of a spring. The normally closed clamp is used in the working condition of the water exploration drilling rig drilling obliquely upward. When the water exploration drilling rig stops due to the addition of drill rods or other reasons, the clamp can clamp the drill rod to prevent the rod from slipping. When the installation space of the whole machine is limited, in order to reduce the height of the whole machine, the height of the clamp needs to be reduced, so it is designed as a normally open clamp. There is no spring in the normally open clamp, and hydraulic control is required to realize the normally closed function of the clamp.

[0003] The existing normally open clamp does not have the normally closed kinetic energy, which causes the risk of the rod slipping when the water exploration drill is drilling obliquely upward, posing a safety hazard. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a water exploration drilling rig linkage control system and control method having a normally open clamp with a normally closed function and capable of preventing the water exploration drilling rig from slipping when drilling obliquely upward.

[0005] The first aspect of the present invention provides a linkage control system for a water exploration drilling rig with a normally open clamp, comprising a clamp, a chuck, a motor and a feed cylinder, and also comprising a first electromagnetic reversing valve, a second electromagnetic reversing valve, a normally closed valve group of the clamp and a hydraulic pump station;

[0006] The first electromagnetic reversing valve is connected to the hydraulic pump station and the feed cylinder. The internal oil circuits of the first electromagnetic reversing valve and the feed cylinder are combined to form a feed and retraction switching control oil circuit. The normally closed valve group of the clamper is connected to the feed cylinder. The clamping and releasing of the clamper are realized through the feed and retraction switching control oil circuit.

[0007] The second electromagnetic reversing valve is connected to the hydraulic pump station and the motor. The internal oil circuits of the second electromagnetic reversing valve and the motor are combined to form a forward and reverse switching control oil circuit. The chuck rotates synchronously with the forward and reverse switching control oil circuit, and the chuck is loosened and clamped through the feed and retraction switching control oil circuit.

[0008] The hydraulic pump station is used to provide a fluid medium of a predetermined pressure and a predetermined flow rate to a water exploration drilling rig with a normally open clamp.

[0009] Optionally, the normally closed valve group of the clamp includes a first one-way valve, a first hydraulically controlled one-way valve, a second one-way valve, a third one-way valve, a second hydraulically controlled one-way valve, a fourth one-way valve, a manual positioning reversing valve, a throttle valve, a hydraulically controlled reversing valve and a pressure reducing valve;

[0010] The oil inlet of the first one-way valve is connected to the oil outlet of the pressure reducing valve, the control port of the first hydraulically controlled one-way valve is connected to the control ports of the throttle valve and the hydraulically controlled reversing valve, the control port of the second hydraulically controlled one-way valve is connected to the b3 port of the manual positioning reversing valve, the oil inlet of the fourth one-way valve is connected to the a3 port of the manual positioning reversing valve, the a3 port of the manual positioning reversing valve is connected to the control port of the hydraulically controlled reversing valve, and the oil outlet of the hydraulically controlled reversing valve is connected to the oil inlet of the pressure reducing valve.

[0011] Optionally, the normally closed valve group of the clamp has 9 ports, namely: port T2, port P2, port P, port E, port D, port C, port B, port A and port T;

[0012] The T2 port is connected to the c3 port of the manual positioning reversing valve, the P2 port is connected to the d3 port of the manual positioning reversing valve, the P port is connected to the oil inlet of the hydraulically controlled reversing valve, the E port is connected to the clamping side B1 of the clamper, the oil outlet of the first one-way valve and the oil outlet of the first hydraulically controlled one-way valve, the D port is connected to the release side A1 of the clamper and the a3 port of the manual positioning reversing valve, the C port is connected to the clamping side A2 of the chuck, the oil outlet of the second one-way valve, the oil outlet of the third one-way valve and the oil outlet of the fourth one-way valve, the B port is connected to the control port of the first hydraulically controlled one-way valve, the A port is connected to the oil inlet of the third one-way valve, and the T port is connected to the hydraulic pump station, the release side B2 of the chuck, the control port C3 of the motor and the throttle valve.

[0013] Optionally, the a1 port of the first solenoid reversing valve, the a2 port of the second solenoid reversing valve and the P port are connected in parallel and connected to the oil outlet of the hydraulic pump station, and the d1 port of the first solenoid reversing valve and the d2 port of the second solenoid reversing valve are connected in parallel and connected to the oil return port of the hydraulic pump station.

[0014] Optionally, the oil circuit led out from the port b1 of the first electromagnetic reversing valve is connected to the rod chamber of the feed cylinder and the port T2 of the normally closed valve group of the clamp through two branches respectively;

[0015] The oil path led out from the C1 port of the first electromagnetic reversing valve is connected to the rodless chamber of the feed cylinder and the P2 port of the normally closed valve group of the clamp through two branches.

[0016] Optionally, the oil path led out from port b2 of the second electromagnetic reversing valve is connected to ports A3 and B of the reverse side of the motor respectively through two branches;

[0017] The oil path led out from the C2 port of the second electromagnetic reversing valve is connected to the B3 and A ports on the positive rotation side of the motor respectively through two branches.

[0018] Optionally, it also includes a pressure gauge and a relief valve, the pressure gauge is connected to the oil inlet of the relief valve, and the oil outlet of the relief valve is connected to the hydraulic pump station.

[0019] A second aspect of the present invention provides a linkage control method for a water exploration drilling rig of a normally open clamp, which is based on a linkage control system for a water exploration drilling rig of a normally open clamp as described in any one of the above, and comprises the following steps:

[0020] The feed and retraction switching control oil circuit includes a feed oil circuit and a retraction oil circuit, and the forward and reverse switching control oil circuit includes a forward drilling oil circuit and a reverse oil circuit;

[0021] S1. When drilling, the feed oil circuit and the forward oil circuit need to be connected, and the manual positioning reversing valve is switched to the parallel position. At this time, the clamp is loosened, the chuck clamps the drill rod, the feed oil cylinder drives the chuck to advance, and the motor rotates forward to drive the chuck and the drill rod to drill forward;

[0022] S2. When adding a rod, the retraction oil circuit needs to be connected, the second electromagnetic reversing valve is switched to the middle position, the motor stops rotating, the clamp clamps the drill rod, the chuck is loosened, the feed cylinder drives the chuck to retract, the drill rod is installed, and the above step S1 is repeated to connect the new drill rod to the previous drill rod;

[0023] S3. When retracting the rod, the retraction oil circuit needs to be connected, and the manual positioning reversing valve is switched to the cross position, the clamp is loosened, the chuck clamps the drill rod, and the feed cylinder drives the chuck and the drill rod to retract;

[0024] S4. When removing the rod, the reverse oil circuit needs to be connected. The motor reverses to drive the drill rod to reverse, and the drill rod is removed.

[0025] Optionally, the b1 port of the first electromagnetic reversing valve in the feed oil circuit is connected to the rod chamber of the feed oil cylinder;

[0026] In the retracting oil circuit, the c1 port of the first electromagnetic reversing valve is connected to the rodless chamber of the feed oil cylinder;

[0027] In the forward oil circuit, the port b2 of the second electromagnetic reversing valve is connected to the reverse side A3 of the motor;

[0028] In the reverse oil circuit, the c2 port of the second electromagnetic reversing valve is connected to the forward rotation side B3 of the motor.

[0029] Optionally, the pressure on the clamping side B1 of the clamp is released through the hydraulic control port of the first hydraulically controlled one-way valve through the throttle valve or the motor oil return line;

[0030] The pressure at the control port of the first hydraulically controlled one-way valve and the control port of the hydraulically controlled reversing valve is released through the oil return pipeline of the feed cylinder;

[0031] The pressure on the clamping side A2 of the chuck is discharged back to the hydraulic pump station through the hydraulic control port of the second hydraulic control one-way valve and the manual positioning reversing valve.

[0032] Compared with the prior art, the technical solution provided by the embodiment of the present invention has the following beneficial effects:

[0033] An embodiment of the present invention provides a linkage control system and control method for a water exploration drilling rig with a normally open clamp. This control system connects the hydraulic pump station and the feed cylinder by setting a first electromagnetic reversing valve. The internal oil circuits of the first electromagnetic reversing valve and the feed cylinder are combined to form a feed and retraction switching control oil circuit. The second electromagnetic reversing valve is connected to the hydraulic pump station and the motor. The internal oil circuits of the second electromagnetic reversing valve and the motor are combined to form a forward and reverse switching control oil circuit. The normally closed valve group of the clamp is set to be connected to the feed cylinder, and the clamping and loosening of the clamp are achieved through the feed and retraction switching control oil circuit, thereby realizing normally closed control of the normally open clamp, enabling the drilling rig to keep the clamp clamping the drill rod when adding a rod, thereby solving the risk of the rod slipping when the normally open clamp water exploration drilling rig drills inclined holes upward.

[0034] This control method implements linkage control. It only needs to control the reversing of the first electromagnetic reversing valve, that is, control the state of the feed cylinder, so that the oil can flow to the clamp and the chuck, thereby controlling the different states of the clamp and the chuck, realizing the drilling, rod adding, rod collecting and rod unloading processes of the drilling rig, and improving the convenience of operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0036] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0037] Figure 1 A schematic structural diagram of a water exploration drilling rig with a normally open clamp according to an embodiment of the present invention;

[0038] Figure 2 A diagram of a linkage control system for a water exploration drilling rig with a normally open clamp according to an embodiment of the present invention;

[0039] Figure 3 This is a control system diagram of the normally closed valve group of the clamper described in an embodiment of the present invention.

[0040] Among them, 1. Clamp; 2. Chuck; 3. Motor; 4. Feed cylinder; 5. First solenoid reversing valve; 6. Second solenoid reversing valve; 7. Clamp normally closed valve group; 7.1. First one-way valve; 7.2. First hydraulically controlled one-way valve; 7.3. Second one-way valve; 7.4. Third one-way valve; 7.5. Second hydraulically controlled one-way valve; 7.6. Fourth one-way valve; 7.7. Manual positioning reversing valve; 7.8. Throttle valve; 7.9. Hydraulically controlled reversing valve; 7.10. Pressure reducing valve; 8. Pressure gauge; 9. Overflow valve; 10. Hydraulic pump station. DETAILED DESCRIPTION

[0041] In order to more clearly understand the above-mentioned objectives, features and advantages of the present invention, the scheme of the present invention will be further described below. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0042] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present invention, rather than all of the embodiments.

[0043] Reference Figures 1 to 3 As shown, the first aspect of this embodiment provides a linkage control system for a water exploration drilling rig with a normally open clamp, including a clamp 1, a chuck 2, a motor 3 and a feed cylinder 4, and also includes a first solenoid reversing valve 5, a second solenoid reversing valve 6, a clamp normally closed valve group 7 and a hydraulic pump station 10.

[0044] Among them, the first solenoid reversing valve 5 is connected to the hydraulic pump station 10 and the feed cylinder 4, and the internal oil circuits of the first solenoid reversing valve 5 and the feed cylinder 4 are combined to form a feed and retraction switching control oil circuit. The normally closed valve group 7 of the clamp is connected to the feed cylinder 4, and the clamping and loosening of the clamp 1 are realized through the feed and retraction switching control oil circuit; the second solenoid reversing valve 6 is connected to the hydraulic pump station 10 and the motor 3, and the internal oil circuits of the second solenoid reversing valve 6 and the motor 3 are combined to form a forward and reverse switching control oil circuit. The chuck 2 rotates synchronously with the forward and reverse switching control oil circuit, and the loosening and clamping of the chuck 2 are realized through the feed and retraction switching control oil circuit; the hydraulic pump station 10 is used to provide a fluid medium with a predetermined pressure and a predetermined flow rate for a normally open clamp water exploration drilling rig.

[0045] Specifically, this embodiment implements normally closed control on the normally open clamp, which enables the drill rig to keep the clamp 1 clamping the drill rod when adding rods, thereby solving the risk of rod slipping when the normally open clamp water exploration drill rig drills inclined holes upward.

[0046] Reference Figure 3As shown, the clamper normally closed valve group 7 includes a first non-return valve 7.1, a first hydraulically controlled non-return valve 7.2, a second non-return valve 7.3, a third non-return valve 7.4, a second hydraulically controlled non-return valve 7.5, a fourth non-return valve 7.6, a manual positioning reversing valve 7.7, a throttle valve 7.8, a hydraulically controlled reversing valve 7.9 and a pressure reducing valve 7.10; the oil inlet of the first non-return valve 7.1 is connected to the oil outlet of the pressure reducing valve 7.10, and the oil inlet of the first hydraulically controlled non-return valve 7.2 is connected to the oil outlet of the pressure reducing valve 7.10. The control port is communicated with the control ports of the throttle valve 7.8 and the hydraulically controlled reversing valve 7.9, the control port of the second hydraulically controlled one-way valve 7.5 is communicated with the b3 port of the manual positioning reversing valve 7.7, the oil inlet of the fourth one-way valve 7.6 is communicated with the a3 port of the manual positioning reversing valve 7.7, the a3 port of the manual positioning reversing valve 7.7 is communicated with the control port of the hydraulically controlled reversing valve 7.9, and the oil outlet of the hydraulically controlled reversing valve 7.9 is communicated with the oil inlet of the pressure reducing valve 7.10.

[0047] Reference Figure 2 As shown, the normally closed valve group 7 of the clamper has 9 interfaces, namely: port T2, port P2, port P, port E, port D, port C, port B, port A and port T; port T2 is connected to port C3 of the manual positioning reversing valve 7.7, port P2 is connected to d3 of the manual positioning reversing valve 7.7, port P is connected to the oil inlet of the hydraulic control reversing valve 7.9, port E is connected to the clamping side B1 of the clamper 1, the oil outlet of the first check valve 7.1 and the oil outlet of the first hydraulic control check valve 7.2, port D is connected to the clamp The release side A1 of the holder 1 is connected to the a3 port of the manual positioning reversing valve 7.7, the C port is connected to the clamping side A2 of the chuck 2, the oil outlet of the second one-way valve 7.3, the oil outlet of the third one-way valve 7.4 and the oil outlet of the fourth one-way valve 7.6, the B port is connected to the control port of the first hydraulically controlled one-way valve 7.2, the A port is connected to the oil inlet of the third one-way valve 7.4, and the T port is connected to the hydraulic pump station 10, the release side B2 of the chuck 2, the control port C3 of the motor 3 and the throttle valve 7.8.

[0048] Furthermore, the a1 port of the first solenoid reversing valve 5 , the a2 port and the P port of the second solenoid reversing valve 6 are connected in parallel and connected to the oil outlet of the hydraulic pump station 10 , and the d1 port of the first solenoid reversing valve 5 and the d2 port of the second solenoid reversing valve 6 are connected in parallel and connected to the oil return port of the hydraulic pump station 10 .

[0049] In some embodiments, the oil circuit led out from the b1 port of the first solenoid reversing valve 5 is connected to the rod chamber of the feed cylinder 4 and the T2 port of the clamp normally closed valve group 7 through two branches; the oil circuit led out from the c1 port of the first solenoid reversing valve 5 is connected to the rodless chamber of the feed cylinder 4 and the P2 port of the clamp normally closed valve group 7 through two branches.

[0050] In other embodiments, the oil circuit led out from the b2 port of the second solenoid reversing valve 6 is connected to the reverse side A3 and B port of the motor 3 respectively through two branches; the oil circuit led out from the c2 port of the second solenoid reversing valve 6 is connected to the forward side B3 and A port of the motor 3 respectively through two branches.

[0051] Of course, this control system also includes a pressure gauge 8 and a relief valve 9 . The pressure gauge 8 is connected to the oil inlet of the relief valve 9 , and the oil outlet of the relief valve 9 is connected to the hydraulic pump station 10 .

[0052] A second aspect of the present embodiment provides a linkage control method for a water exploration drilling rig of a normally open clamp, which is completed based on a linkage control system for a water exploration drilling rig of a normally open clamp described in any one of the above items, and includes the following steps:

[0053] The feed and retraction switching control oil circuit includes a feed oil circuit and a retraction oil circuit, and the forward and reverse switching control oil circuit includes a forward drilling oil circuit and a reverse oil circuit;

[0054] S1. When drilling, the feed oil circuit and the forward oil circuit need to be connected, and the manual positioning reversing valve 7.7 is switched to the parallel position. At this time, the clamp 1 is loosened, the chuck 2 clamps the drill rod, the feed oil cylinder 4 drives the chuck 2 to advance, and the motor 3 rotates forward to drive the chuck 2 and the drill rod to rotate forward for drilling;

[0055] S2, when adding a rod, the retraction oil circuit needs to be connected, the second electromagnetic reversing valve 6 is switched to the middle position, the motor 3 stops rotating, the clamp 1 clamps the drill rod, the chuck 2 is loosened, the feed cylinder 4 drives the chuck 2 to retract, the drill rod is installed, and the above step S1 is repeated to connect the new drill rod to the previous drill rod;

[0056] S3, when retracting the rod, the retraction oil circuit needs to be connected, and the manual positioning reversing valve 7.7 is switched to the cross position, the clamp 1 is released, the chuck 2 clamps the drill rod, and the feed cylinder 4 drives the chuck 2 and the drill rod to retract;

[0057] S4. When removing the rod, the reverse oil circuit needs to be connected. The motor 3 reverses to drive the drill rod to reverse, and the drill rod is removed.

[0058] In the feed oil circuit, the b1 port of the first solenoid reversing valve 5 is connected to the rod chamber of the feed cylinder 4; in the retraction oil circuit, the c1 port of the first solenoid reversing valve 5 is connected to the rodless chamber of the feed cylinder 4; in the forward oil circuit, the b2 port of the second solenoid reversing valve 6 is connected to the reverse side A3 of the motor 3; in the reverse oil circuit, the c2 port of the second solenoid reversing valve 6 is connected to the forward side B3 of the motor 3.

[0059] The pressure on the clamping side B1 of the clamper 1 is released through the hydraulic control port of the first hydraulically controlled one-way valve 7.2 via the throttle valve 7.8 or the return oil pipeline of the motor 3; the pressure at the control port of the first hydraulically controlled one-way valve 7.2 and the control port of the hydraulically controlled reversing valve 7.9 is released through the return oil pipeline of the feed cylinder 4; the pressure on the clamping side A2 of the chuck 2 is released back to the hydraulic pump station 10 through the hydraulic control port of the second hydraulically controlled one-way valve 7.5 via the manual positioning reversing valve 7.7.

[0060] The specific operation is as follows: to achieve drilling, the motor 3 only needs to rotate to drive the chuck 2 to rotate, and at the same time, the drill rod is clamped by the chuck 2 and rotates together, and the drill rod drives the drill bit to drill. Specifically, start the hydraulic pump station 10, switch the manual positioning reversing valve 7.7 to the parallel position, install the drill rod, switch the first electromagnetic reversing valve 5 to the cross position, the oil flows in from the a1 port of the switched first electromagnetic reversing valve 5, flows out from the b1 port of the switched first electromagnetic reversing valve 5, enters through the A4 port of the feed cylinder 4, pushes the piston rod of the feed cylinder 4 to extend, the oil flows out from the B4 port of the feed cylinder 4, enters the manual positioning reversing valve 7.7 through the P2 port and the d3 port of the manual positioning reversing valve 7.7, flows out through the a3 port of the manual positioning reversing valve 7.7, one way enters the A2 port of the chuck 2 through the fourth one-way valve 7.6, the chuck 2 clamps the drill rod, and the other way enters the A1 port of the clamp 1, the loosening side of the clamp 1, in order to maintain the clamping When the drill pipe is loosened, the pressure at the B1 port of the clamp 1 needs to be relieved. At this time, the oil at the a3 port of the manual positioning reversing valve 7.7 flows to the hydraulic control reversing valve 7.9 and the first hydraulic control non-return valve 7.2. The control port of the first hydraulic control non-return valve 7.2 has pressure, which makes the first hydraulic control non-return valve 7.2 open, and the hydraulic control reversing valve 7.9 is blocked in the right position. At this time, the pressure at the B1 port of the clamp 1 is relieved through the first hydraulic control non-return valve 7.2 and the throttle valve 7.8, or through the E port, flows through the B port, and is relieved along the return oil pipe of the motor 3. At this time, the chuck 2 clamps the drill pipe, the clamp 1 is loosened, and the second electromagnetic reversing valve 6 is switched to the cross position, so that the oil enters the motor 3 through the b2 port of the second electromagnetic reversing valve 6 and the A3 port of the motor 3. The motor 3 rotates forward to drive the drill pipe to drill.

[0061] When a drill rod is fed and drilled, the second electromagnetic reversing valve 6 is switched to the middle position, the motor 3 stops rotating, and the first electromagnetic reversing valve 5 is switched to the parallel position. The oil flows to the rodless chamber of the feed cylinder 4 through the c1 port of the first electromagnetic reversing valve 5, pushing the piston rod to retract, and the oil flows out from the rod chamber of the feed cylinder 4, enters the manual positioning reversing valve 7.7 through the T2 port, flows out through the b3 port of the manual positioning reversing valve 7.7, and flows into the second hydraulically controlled one-way valve 7.5. The control port of the second hydraulically controlled one-way valve 7.5 has pressure, so that the second hydraulically controlled one-way valve 7.5 is opened, and the pressure on the clamping side A2 of the chuck 2 is discharged back to the hydraulic pump station 10 through the second hydraulically controlled one-way valve 7.5 and the T2 port. At this time, the chuck 2 is relaxed, there is no pressure at the P2 port, there is no pressure at the control ports of the hydraulically controlled reversing valve 7.9 and the first hydraulically controlled non-return valve 7.2, the hydraulically controlled reversing valve 7.9 and the first hydraulically controlled non-return valve 7.2 are reset, and the oil in the hydraulic pump station 10 directly enters the clamping side B1 of the clamp 1 through the hydraulically controlled reversing valve 7.9 and the pressure reducing valve 7.10, and the pressure at the loosening side A1 of the clamp 1 is released to the hydraulic pump station 10 through the D port and the P2 port. At this time, the chuck 2 is relaxed, the clamp 1 clamps the drill rod and does not move, the feed cylinder 4 retreats, and drives the chuck 2 to retreat synchronously. When the chuck 2 and the feed cylinder 4 retreat to the installation position, the drill rod can be installed again, and the above steps can be repeated to achieve rod addition.

[0062] When retracting the rod, the chuck 2 needs to clamp the drill rod, the clamp 1 is relaxed, and the feed cylinder 4 is retracted, thereby bringing the drill rod back. Specifically, the hydraulic pump station 10 is started, the second electromagnetic reversing valve 6 is still in the middle position, the manual positioning reversing valve 7.7 is switched to the cross position, and the first electromagnetic reversing valve 5 is switched to the parallel position. The oil flows through the c1 port of the first electromagnetic reversing valve 5 to the B4 port of the feed cylinder 4, that is, the oil enters from the rodless cavity of the feed cylinder 4, pushing the piston rod to retract, and the oil flows out from the A4 port of the feed cylinder 4, flows out through the b3 port of the manual positioning reversing valve 7.7, flows to the A2 port of the chuck 2, that is, the clamping side of the chuck 2, and flows to the hydraulically controlled reversing valve 7.9 and the first hydraulically controlled one-way valve. In valve 7.2, there is pressure at the control port of the first hydraulically controlled non-return valve 7.2, so that the first hydraulically controlled non-return valve 7.2 is opened, and the hydraulically controlled reversing valve 7.9 is blocked in the right position. At this time, the pressure at the B1 port of the clamp 1 is released through the first hydraulically controlled non-return valve 7.2 and the throttle valve 7.8, or flows through the E port, passes through the B port, and is released along the return oil pipe of the motor 3. At this time, the clamp 1 is relaxed, the chuck 2 clamps the drill rod, and the feed cylinder 4 retreats to drive the chuck 2 to retreat, realizing the rod collection. The drill rods are connected by threads. Repeat this operation to retract all the drill rods.

[0063] When unloading the drill rod, the chuck 2 needs to be operated to clamp the drill rod, the clamp 1 needs to be clamped, and the motor 3 needs to be reversed, so that the drill rod can be removed. Specifically, the manual positioning reversing valve 7.7 is still in the cross position, and the second electromagnetic reversing valve 6 is switched to the parallel position. The oil flows out through the reversing side A3 of the motor 3 and enters the clamping side A2 of the chuck 2 through the second one-way valve 7.3. At this time, the chuck 2 clamps the drill rod, and the reversal of the motor 3 drives the chuck 2 to reverse, so that the drill rod clamped by the chuck 2 is reversed, and the separation from the previous drill rod is achieved. The second electromagnetic reversing valve 6 is switched to the middle position, the motor 3 stops rotating, and the first electromagnetic reversing valve 5 is switched to the cross position. The oil flows out through the rodless chamber of the feed cylinder 4. At this time, the manual positioning reversing valve 7.7 is still in the cross position, so the oil enters the second The hydraulic control port of the hydraulic control check valve 7.5, the second hydraulic control check valve 7.5 is opened, and the pressure on the clamping side A2 of the chuck 2 is released through the second hydraulic control check valve 7.5. At this time, the chuck 2 is in a relaxed state. The pressure at the control port of the hydraulic control reversing valve 7.9 and the control port of the first hydraulic control check valve 7.2 is released through the positioning reversing valve 7.7 along the return oil pipeline of the feed cylinder 4. The oil in the hydraulic pump station 10 directly enters the clamping side B1 of the clamp 1 through the hydraulic control reversing valve 7.9 and the pressure reducing valve 7.10. The clamp 1 clamps the drill rod, and the feed cylinder 4 drives the chuck 2 in the relaxed state to move toward the clamp 1. One end of the drill rod clamped by the clamp 1 passes through the chuck 2. Repeat the above steps to remove all the drill rods.

[0064] In the prior art, the clamp 1, chuck 2, motor 3 and feed cylinder 4 need to be controlled separately. The control method provided in this embodiment performs linkage control. It only needs to control the reversing of the first electromagnetic reversing valve 5, that is, control the state of the feed cylinder 4, so that the oil can flow to the clamp 1 and the chuck 2 to control the different states of the clamp 1 and the chuck 2, thereby realizing drilling, adding rods, collecting rods and unloading rods of the drilling rig, thereby improving the convenience of operation.

[0065] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0066] The above description is only a specific embodiment of the present invention, so that those skilled in the art can understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments described herein, but should conform to the widest scope consistent with the principles and novel features invented herein.

Claims

1. A linkage control system for a water exploration drilling rig with a normally open clamp, comprising a clamp (1), a chuck (2), a motor (3) and a feed cylinder (4), characterized in that: It also includes a first electromagnetic reversing valve (5), a second electromagnetic reversing valve (6), a clamper normally closed valve group (7) and a hydraulic pump station (10); The first electromagnetic reversing valve (5) is connected to the hydraulic pump station (10) and the feed oil cylinder (4); the internal oil circuits of the first electromagnetic reversing valve (5) and the feed oil cylinder (4) are combined to form a feed and retraction switching control oil circuit; the clamper normally closed valve group (7) is connected to the feed oil cylinder (4); and the clamping and releasing of the clamper (1) are realized through the feed and retraction switching control oil circuit; The second electromagnetic reversing valve (6) is connected to the hydraulic pump station (10) and the motor (3); the internal oil circuits of the second electromagnetic reversing valve (6) and the motor (3) are combined to form a forward and reverse switching control oil circuit; the chuck (2) rotates synchronously with the forward and reverse switching control oil circuit, and the chuck (2) is loosened and clamped through the feed and retraction switching control oil circuit; The hydraulic pump station (10) is used to provide a fluid medium with a predetermined pressure and a predetermined flow rate to a water exploration drilling rig with a normally open clamp.

2. The linkage control system of a water exploration drilling rig with a normally open clamp according to claim 1, characterized in that: The clamper normally closed valve group (7) comprises a first one-way valve (7.1), a first hydraulically controlled one-way valve (7.2), a second one-way valve (7.3), a third one-way valve (7.4), a second hydraulically controlled one-way valve (7.5), a fourth one-way valve (7.6), a manual positioning reversing valve (7.7), a throttle valve (7.8), a hydraulically controlled reversing valve (7.9) and a pressure reducing valve (7.10); The oil inlet of the first one-way valve (7.1) is communicated with the oil outlet of the pressure reducing valve (7.10), the control port of the first hydraulically controlled one-way valve (7.2) is communicated with the control ports of the throttle valve (7.8) and the hydraulically controlled reversing valve (7.9), the control port of the second hydraulically controlled one-way valve (7.5) is communicated with the b3 port of the manual positioning reversing valve (7.7), the oil inlet of the fourth one-way valve (7.6) is communicated with the a3 port of the manual positioning reversing valve (7.7), the a3 port of the manual positioning reversing valve (7.7) is communicated with the control port of the hydraulically controlled reversing valve (7.9), and the oil outlet of the hydraulically controlled reversing valve (7.9) is communicated with the oil inlet of the pressure reducing valve (7.10).

3. The linkage control system of a water exploration drilling rig with a normally open clamp according to claim 2, characterized in that: The clamper normally closed valve group (7) has 9 ports, namely: port T2, port P2, port P, port E, port D, port C, port B, port A and port T; The T2 port is connected to the c3 port of the manual positioning reversing valve (7.7), the P2 port is connected to the d3 port of the manual positioning reversing valve (7.7), the P port is connected to the oil inlet port of the hydraulic control reversing valve (7.9), the E port is connected to the clamping side B1 of the clamp (1), the oil outlet port of the first check valve (7.1) and the oil outlet port of the first hydraulic control check valve (7.2), the D port is connected to the release side A1 of the clamp (1) and the a3 port of the manual positioning reversing valve (7.7), The C port is in communication with the clamping side A2 of the chuck (2), the oil outlet of the second one-way valve (7.3), the oil outlet of the third one-way valve (7.4) and the oil outlet of the fourth one-way valve (7.6); the B port is in communication with the control port of the first hydraulically controlled one-way valve (7.2); the A port is in communication with the oil inlet of the third one-way valve (7.4); and the T port is in communication with the hydraulic pump station (10), the release side B2 of the chuck (2), the control port C3 of the motor (3) and the throttle valve (7.8).

4. The linkage control system of a water exploration drilling rig with a normally open clamp according to claim 3, characterized in that: The a1 port of the first electromagnetic reversing valve (5), the a2 port of the second electromagnetic reversing valve (6) and the P port are connected in parallel and connected to the oil outlet of the hydraulic pump station (10); the d1 port of the first electromagnetic reversing valve (5) and the d2 port of the second electromagnetic reversing valve (6) are connected in parallel and connected to the oil return port of the hydraulic pump station (10).

5. The linkage control system of a water exploration drilling rig with a normally open clamp according to claim 3, characterized in that: The oil path led out from the port b1 of the first electromagnetic reversing valve (5) is connected to the rod chamber of the feed oil cylinder (4) and the port T2 of the clamper normally closed valve group (7) through two branches respectively; The oil path led out from the C1 port of the first electromagnetic reversing valve (5) is connected to the rodless chamber of the feed cylinder (4) and the P2 port of the clamper normally closed valve group (7) respectively through two branches.

6. The linkage control system of a water exploration drilling rig with a normally open clamp according to claim 3, characterized in that: The oil path leading out of the port b2 of the second electromagnetic reversing valve (6) is connected to the ports A3 and B of the reverse side of the motor (3) respectively through two branches; The oil path leading out of the C2 port of the second electromagnetic reversing valve (6) is connected to the forward rotation side B3 and A ports of the motor (3) respectively through two branches.

7. The linkage control system of a water exploration drilling rig with a normally open clamp according to claim 1, characterized in that: It also includes a pressure gauge (8) and a relief valve (9), wherein the pressure gauge (8) is connected to the oil inlet of the relief valve (9), and the oil outlet of the relief valve (9) is connected to the hydraulic pump station (10).

8. A method for controlling a water exploration drilling rig with a normally open clamp, based on the water exploration drilling rig linkage control system of a normally open clamp as claimed in any one of claims 2 to 7, characterized in that: The following steps are involved: The feed and retraction switching control oil circuit includes a feed oil circuit and a retraction oil circuit, and the forward and reverse switching control oil circuit includes a forward drilling oil circuit and a reverse oil circuit; S1. When drilling, the feed oil circuit and the forward oil circuit need to be connected, and the manual positioning reversing valve (7.7) is switched to the parallel position. At this time, the clamp (1) is loosened, the chuck (2) clamps the drill rod, the feed oil cylinder (4) drives the chuck (2) to advance, and the motor (3) rotates forward to drive the chuck (2) and the drill rod to rotate forward for drilling; S2, when adding a drill rod, the retraction oil circuit needs to be connected, the second electromagnetic reversing valve (6) is switched to the middle position, the motor (3) stops rotating, the clamp (1) clamps the drill rod, the chuck (2) is loosened, the feed oil cylinder (4) drives the chuck (2) to retract, the drill rod is installed, and the above step S1 is repeated to connect the new drill rod to the previous drill rod; S3, when retracting the rod, the retraction oil circuit needs to be connected, and the manual positioning reversing valve (7.7) is switched to the cross position, the clamp (1) is released, the chuck (2) clamps the drill rod, and the feed cylinder (4) drives the chuck (2) and the drill rod to retract; S4. When removing the rod, the reverse oil circuit must be connected, and the motor (3) reverses to drive the drill rod to reverse, and the drill rod is removed.

9. The linkage control method for a water exploration drilling rig of a normally open clamp according to claim 8, characterized in that: In the feed oil circuit, the port b1 of the first electromagnetic reversing valve (5) is connected to the rod chamber of the feed oil cylinder (4); In the retraction oil circuit, the c1 port of the first electromagnetic reversing valve (5) is connected to the rodless chamber of the feed oil cylinder (4); The port b2 of the second electromagnetic reversing valve (6) in the forward oil circuit is connected to the reverse side A3 of the motor (3); In the reverse oil circuit, the c2 port of the second electromagnetic reversing valve (6) is connected to the forward rotation side B3 of the motor (3).

10. The linkage control method of a water exploration drilling rig with a normally open clamp according to claim 9, characterized in that: The pressure on the clamping side B1 of the clamp (1) is released through the hydraulic port of the first hydraulically controlled one-way valve (7.2) via the throttle valve (7.8) or the oil return line of the motor (3); The pressure at the control port of the first hydraulically controlled one-way valve (7.2) and the control port of the hydraulically controlled reversing valve (7.9) is released through the oil return pipeline of the feed oil cylinder (4); The pressure on the clamping side A2 of the chuck (2) is discharged back to the hydraulic pump station (10) through the hydraulic control port of the second hydraulic control check valve (7.5) and the manual positioning reversing valve (7.7).

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