Electro-hydraulic control system for disc brake of drilling machine

Abstract

The invention relates to the technical field of drilling rig winch equipment, in particular to an electro-hydraulic control system for a disc brake of a drilling rig, which comprises an oil source, an oil tank, safety tongs and a safety tongs control oil way, the safety tongs are connected with the oil source and the oil tank through the safety tongs control oil way, a safety tongs oil return oil way is connected to the safety tongs control oil way in parallel, and the safety tongs oil return oil way is connected with the safety tongs and the oil tank. The safety tongs oil return oil way is connected to the safety tongs control oil way in parallel, the oil way used for pressure relief of the safety tongs is added, the response speed of the safety tongs is increased, the braking effect can be achieved more quickly, and the safety performance is improved.

Description

Technical Field

[0001] The invention relates to the technical field of drilling rig winch equipment, and in particular to an electro-hydraulic control system for drilling rig disc brakes. Background Art

[0002] At present, hydraulic disc brakes have been widely used on the winches of drilling rig equipment. The hydraulic disc brakes control the working brake and parking brake of the winch, and in an emergency, the winch must be emergency braked. During the drilling construction process, there are occasional emergencies (such as power failure of the main motor, loss of the winch's hovering function, etc.). The hydraulic disc brake must be quickly put into emergency braking to ensure the safety of personnel and equipment, which requires the hydraulic disc brake system to respond quickly.

[0003] In the related technology, the electro-hydraulic control system of the hydraulic disc brake is connected in series through an emergency brake solenoid valve and a pneumatically controlled reversing valve control circuit, and the main circuit of the pneumatically controlled reversing valve is connected in series with a parking brake solenoid valve. The emergency brake solenoid valve and the parking brake solenoid valve are simultaneously de-energized to control the safety clamp and the hydraulically controlled reversing valve to release pressure. Although the safety clamp and the working clamp braking can be achieved, the safety clamp pressure relief speed is slow, which can easily cause safety accidents. Summary of the invention

[0004] The technical problem to be solved by the present invention is that when emergency braking is implemented, the pressure relief speed of the safety clamp is slow, which easily causes safety accidents.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] First, an electro-hydraulic control system for a drilling rig disc brake is provided, which includes an oil source, an oil tank, a safety clamp and a safety clamp control oil circuit; the safety clamp is connected to the oil source and the oil tank through the safety clamp control oil circuit, a safety clamp return oil circuit is connected in parallel to the safety clamp control oil circuit, and the safety clamp return oil circuit connects the safety clamp and the oil tank.

[0007] Further; also includes a pneumatic control reversing valve, a first electromagnetic reversing valve and a second electromagnetic reversing valve, the safety clamp oil return circuit includes a first oil return circuit;

[0008] The first electromagnetic reversing valve and the air-controlled reversing valve are connected in series on the safety clamp control oil circuit, and the second electromagnetic reversing valve is arranged on the first oil return oil circuit and connected in parallel with the first electromagnetic reversing valve.

[0009] Further, the first oil return oil circuit includes oil circuit L1, oil circuit L3, oil circuit L4 and oil circuit L8 connected in sequence, the oil circuit L1 is connected to the safety clamp, the oil circuit L8 is connected to the oil tank, and the second solenoid reversing valve is arranged on the oil circuit L4;

[0010] The safety clamp control oil circuit includes a third oil return circuit connecting the safety clamp and the oil tank, the third oil return circuit includes oil circuit L1, oil circuit L3, oil circuit L6 and oil circuit L7 connected in sequence, the oil circuit L7 is connected to the oil tank, and the first electromagnetic reversing valve and the air-controlled reversing valve are connected in series on the oil circuit L6.

[0011] Furthermore, the first electromagnetic reversing valve is connected to the oil circuit L8.

[0012] Furthermore, it also includes a third electromagnetic reversing valve, the safety clamp oil return circuit also includes a second oil return circuit, and the third electromagnetic reversing valve is arranged on the second oil return circuit.

[0013] Furthermore, the second oil return circuit includes oil circuit L1, oil circuit L2 and oil circuit L9 which are connected in sequence, the oil circuit L1 is connected to the safety clamp, the oil circuit L9 is connected to the oil tank, and the third electromagnetic reversing valve is arranged on the oil circuit L9.

[0014] Furthermore; the safety clamp control oil circuit includes an oil inlet circuit connecting the safety clamp and the oil source, the oil inlet circuit includes oil circuit L1, oil circuit L3, oil circuit L6 and oil circuit L11 connected in sequence, the oil circuit L1 is connected to the safety clamp, the oil circuit L11 is connected to the oil source, the oil circuit L11 is provided with a pressure switch and a fourth sensor, and the oil circuit L6 is provided with a fifth sensor.

[0015] Further, it also includes a left working clamp and a left control oil circuit connected to the left working clamp, the left control oil circuit includes an oil circuit L23, an oil circuit L21, an oil circuit L18 and an oil circuit L17 connected to the oil source P3 interface, a second hydraulically controlled reversing valve is provided on the oil circuit L21, the second hydraulically controlled reversing valve is connected to a left working clamp control module, the left working clamp control module is connected to the oil tank through the oil circuit L10, and the X3 interface of the second hydraulically controlled reversing valve is connected to the safety clamp control oil circuit through the oil circuit L5;

[0016] A third pressure sensor is installed on the oil circuit L23 of the left control oil circuit close to the left working clamp.

[0017] Further; it also includes a right working clamp and a right control oil circuit connected to the right working clamp, the right control oil circuit includes an oil circuit L22 connected to the oil source P2 interface, an oil circuit L20, an oil circuit L15 and an oil circuit 14, the oil circuit L20 is provided with a first hydraulically controlled reversing valve, the first hydraulically controlled reversing valve is connected to a right working clamp control module, the right working clamp control module is connected to the oil tank through the oil circuit L10, and the X2 interface of the first hydraulically controlled reversing valve is connected to the safety clamp control oil circuit through the oil circuit L5;

[0018] A second pressure sensor is installed on the oil circuit L22 of the right control oil circuit close to the oil circuit working pliers.

[0019] Further; also includes a working clamp control module, the working clamp control module is connected to the oil source P1 interface through the oil circuit L11 and the oil circuit L12, the working clamp control module is connected to the G2 interface of the left working clamp control module and the G1 interface of the right working clamp control module through the oil circuit L13;

[0020] A first pressure sensor is installed on the oil circuit L1 of the safety gear control oil circuit close to the safety gear.

[0021] The present invention has the following beneficial effects: the present invention connects the safety clamp oil return oil circuit in parallel with the safety clamp control oil circuit, and the safety clamp oil return oil circuit connects the safety clamp with the oil tank, thereby increasing the oil circuit for the safety clamp pressure relief, ensuring that in the case of emergency braking, the pressure in the safety clamp can be quickly released, achieving the effect of emergency braking and improving the safety performance;

[0022] In addition, the setting of multiple oil circuits also makes the system respond quickly and have high safety, and the multiple oil circuits do not affect each other. When certain equipment fails, the system can still operate stably. Through the parallel connection of the first solenoid reversing valve and the second solenoid reversing valve, the safety of the system is greatly improved, and the response speed of the hydraulic system during emergency braking of the system is effectively improved, making the system more stable and reliable to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] 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, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0024] Figure 1 This is the emergency braking state diagram of this embodiment;

[0025] Figure 2 This is a working braking state diagram of this embodiment;

[0026] Figure 3 is a parking brake state diagram of this embodiment;

[0027] Figure 4 This is a table of power gain and loss states under three different working conditions: working brake, parking brake and emergency brake in this embodiment.

[0028] 1-Oil source system, 2-Oil circuit control system, 21-Electromagnetic air control valve, 22-Air control reversing valve, 23-First electromagnetic reversing valve, 24-Second electromagnetic reversing valve, 25-First hydraulic control reversing valve, 26-Second hydraulic control reversing valve, 27-Working clamp control module, 28-Right working clamp control module, 29-Left working clamp control module, 210-Pressure switch, 211-Fourth pressure sensor, 212-Fifth pressure sensor, 213-First pressure gauge, 214-Second pressure gauge, 215-Third pressure gauge , 216-first quick-change connector, 217-second quick-change connector, 218-third quick-change connector, 3-remote control system, 31-third solenoid reversing valve, 32.1-first pressure sensor, 32.2-second pressure sensor, 32.3-third pressure sensor, 33-fourth quick-change connector, 34-fifth quick-change connector, 35-sixth quick-change connector, 36-safety clamp, 37-right working clamp, 38-left working clamp, 41-first hydraulic hose, 42-second hydraulic hose, 43-third hydraulic hose;

[0029] L1-the fourth quick-change connector 33 is connected to the safety clamp 36 in the oil circuit;

[0030] L2-the B port of the third electromagnetic reversing valve 31 is connected to the oil circuit of the safety clamp 36;

[0031] L3-Port B of the first electromagnetic reversing valve 23 is connected to the first quick-change connector 216 for oil circuit connection;

[0032] L4-the B port of the first electromagnetic reversing valve 23 and the B port of the second electromagnetic reversing valve 24 are connected to the oil circuit;

[0033] L5 - control oil circuit of the first hydraulically controlled reversing valve 25 and the second hydraulically controlled reversing valve 26 (the X2 port of the first hydraulically controlled reversing valve 25 and the X3 port of the second hydraulically controlled reversing valve 26 are connected to the B port of the first electromagnetic reversing valve 23);

[0034] L6-the B port of the air-controlled reversing valve 22 and the P port of the first electromagnetic reversing valve 23 are connected to the oil circuit;

[0035] L7 - oil return circuit where the T port of the air-controlled reversing valve 22 is connected to the T port of the oil tank;

[0036] L8 - oil return circuit connecting the T port of the first electromagnetic reversing valve 23 and the T port of the second electromagnetic reversing valve 24 to the T port of the oil tank;

[0037] L9 - oil return circuit connecting the T port of the third electromagnetic reversing valve 31 and the T2 port of the oil tank;

[0038] L10 - oil return circuit connecting the T port of the right working clamp control module 28 and the T port of the left working clamp control module 29 with the T port of the oil tank;

[0039] L11-the oil source P1 port is connected to the P port of the air-controlled reversing valve 22;

[0040] L12-the oil source P1 port is connected to the P port of the working clamp control module 27;

[0041] L13-the G port of the right working clamp control module 28 and the G port of the left working clamp control module 29 are connected to the A port of the working clamp control module 27 through the oil circuit;

[0042] L14 - oil circuit connecting the oil source P2 and the SP1 port of the right working clamp control module 28;

[0043] L15 - oil source P2 is connected to the B port of the first hydraulically controlled reversing valve 25;

[0044] L16-the BR1 port of the right working clamp control module 28 is connected to the A port of the first hydraulically controlled reversing valve 25;

[0045] L17 - oil circuit connecting the oil source P3 and the SP2 port of the left working clamp control module 29;

[0046] L18 - oil source P3 is connected to port B of the second hydraulically controlled reversing valve 26;

[0047] L19 - the BR2 port of the left working clamp control module 29 is connected to the A port of the second hydraulically controlled reversing valve 26 through an oil circuit;

[0048] L20-the P port of the first hydraulically controlled reversing valve 25 is connected to the oil circuit of the second quick-change connector 217;

[0049] L21-the P port of the second hydraulically controlled reversing valve 26 is connected to the oil circuit of the third quick-change connector 218;

[0050] L22-the fifth quick-change connector 34 is connected to the oil circuit with the right working pliers 37;

[0051] L23-The sixth quick-change connector 35 is connected to the left working pliers 38 through the oil circuit. DETAILED DESCRIPTION

[0052] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below through specific implementation modes in conjunction with the accompanying drawings.

[0053] It should be noted that all directional indications in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between various components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0054] In addition, in the present invention, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0055] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0056] The present invention provides an electro-hydraulic control system for a drilling rig disc brake, such as Figure 1 As shown, it includes an oil source system 1, an oil circuit control system 2 and a remote control system 3.

[0057] In this embodiment, the remote control system 3 includes a left working clamp 38, a right working clamp 37 and a safety clamp 36. When the left and right working clamps are depressurized, they are in a released state. Conversely, when there is pressure in the left and right working clamps, they are in a braking state. When the safety clamp 36 is depressurized, it is in a braking state. When there is pressure in the safety clamp 36, it is in a released state.

[0058] The oil source system 1 comprises an oil source and an oil tank, wherein the oil source is connected to the left working clamp 38 , the right working clamp 37 and the safety clamp 36 , and the oil tank is connected to the left working clamp 38 , the right working clamp 37 and the safety clamp 36 .

[0059] The oil circuit control system 2 includes a left control oil circuit, a right control oil circuit and a safety clamp control oil circuit.

[0060] Specifically, the left control oil circuit includes oil circuit L23, oil circuit L21, oil circuit L18 and oil circuit L17 connected to the oil source P3 interface, oil circuit L23, oil circuit L21, oil circuit L19, left working clamp control module 29 and oil circuit L10 connected to the oil tank T interface, wherein oil circuit L17 is connected to the left working clamp control module 29.

[0061] Furthermore, a second hydraulically controlled reversing valve 26 is provided on the oil circuit L21, and the oil circuit L18 and the oil circuit L19 are connected to the second hydraulically controlled reversing valve 26; the interface BR2 of the left working clamp control module 29 is connected to the oil circuit L19, the interface SP2 of the left working clamp control module 29 is connected to the oil circuit L17, and the interface T of the left working clamp control module 29 is connected to the oil circuit L10.

[0062] The right control oil circuit includes oil circuit L22, oil circuit L20, oil circuit L15 and oil circuit L14 connected to the oil source P2 interface, and oil circuit L22, oil circuit L20, oil circuit L16, the right working clamp control module 28 and oil circuit L10 connected to the oil tank T interface, wherein oil circuit L14 is connected to the right working clamp control module 28.

[0063] Furthermore, a first hydraulically controlled reversing valve 25 is provided on the oil circuit L20, and the oil circuit L15 and the oil circuit L16 are connected to the first hydraulically controlled reversing valve 25; the interface BR1 of the right working clamp control module 28 is connected to the oil circuit L16, the interface SP1 of the right working clamp control module 28 is connected to the oil circuit L14, and the interface T of the right working clamp control module 28 is connected to the oil circuit L10.

[0064] The left and right working clamp control modules are hydraulically controlled three-position three-way reversing valves in the prior art, which will not be described in detail here.

[0065] The safety gear control oil circuit includes oil circuit L1, oil circuit L3, oil circuit L6 and oil circuit L11 connected to the oil source P1 interface;

[0066] The oil circuit L1, oil circuit L3, oil circuit L4 and oil circuit L8 connected to the interface of the oil tank T1 constitute the first oil return circuit;

[0067] The oil circuit L1, oil circuit L2 and oil circuit L9 connected to the interface of the oil tank T2 form the second oil return circuit;

[0068] The oil circuit L1, oil circuit L3, oil circuit L6 and oil circuit L7 connected to the interface of the oil tank T constitute a third oil return circuit.

[0069] It can be seen that the safety clamp 36 has three oil return lines connected to the oil tank. When an emergency occurs, the safety clamp 36 can be depressurized through at least three oil return lines, that is, the braking state, which can achieve the effect of fast pressure relief and quick response. In addition, the first oil return line, the second oil return line and the third oil return line are independent of each other. If a certain oil return line fails, the other oil return lines can still work normally, ensuring emergency braking and improving the safety of the system.

[0070] Specifically, a first solenoid reversing valve 23 is provided on the oil circuit L3, and the oil circuit L6 and the oil circuit L8 are connected to the first solenoid reversing valve 23. In some embodiments, the first solenoid reversing valve 23 can also be directly connected to L7 to drain oil. A second solenoid reversing valve 24 is connected in parallel to the first solenoid reversing valve 23, and the second solenoid reversing valve 24 is connected to the oil circuit L3 through the oil circuit L4, and the oil circuit L8 is connected to the second solenoid reversing valve 24. The parallel redundant connection method ensures that when the first solenoid reversing valve 23 fails, the second solenoid reversing valve 24 can still have a pressure relief effect.

[0071] The oil circuit L6 is connected to a gas-controlled reversing valve 22 , and the oil circuits L7 and L11 are connected to the gas-controlled reversing valve 22 .

[0072] A third electromagnetic reversing valve 31 is provided on the oil circuit L2 , wherein the oil circuit L9 is connected to the third electromagnetic reversing valve 31 .

[0073] In this embodiment, Figure 1 As shown, when an emergency occurs, the electromagnet YV14 of the first electromagnetic reversing valve 23 and the electromagnet YV15 of the second electromagnetic reversing valve 24 lose power at the same time. At this time, the first electromagnetic reversing valve 23 and the second electromagnetic reversing valve 24 work in the right position. At this time, the oil circuit L3 and the oil circuit L4 are connected with the oil circuit L8. At this time, the oil circuit L1, the oil circuit L3, the oil circuit L4 and the oil circuit L8 are connected with the oil tank T1 interface, that is, there is no pressure. At this time, the safety clamp is depressurized and the safety clamp is in the braking state;

[0074] like Figure 2 As shown in FIG. 1 , when the electromagnets YV14 and YV15 are energized at the same time, the first electromagnetic reversing valve 23 and the second electromagnetic reversing valve 24 work in the left position. At this time, the oil circuits L1, L3 and L4 are connected to the oil circuit L6. Therefore, the oil pressure in the safety clamp is determined by the oil circuit L6. Figure 2 As shown, the air-controlled reversing valve 22 works in the right position, and the oil circuit L6 is connected to the oil circuit L7, so that the safety clamp reaches the state of pressure relief, that is, the braking state; Figure 2 As shown, the air-controlled reversing valve 22 works so that the oil circuit L6 is connected to the oil circuit L11 in the left position. Under the action of the oil source pressure, the safety clamp is under pressure at this time, and is in a non-braking state, that is, a brake-released state.

[0075] The electromagnet YV16 of the third electromagnetic reversing valve 31 loses power, and the working position of the third electromagnetic reversing valve 31 is in the right position. At this time, the oil circuits L1, L2 and L9 are connected, and the pressure relief state is also reached. The safety clamp is in the braking state, that is, the braking state; when the electromagnet YV16 is energized, the working position of the third electromagnetic reversing valve 31 is in the left position. At this time, the oil circuit L2 is disconnected from the oil circuit L9, so that the oil circuit L2 is in the pressure maintaining state.

[0076] In order to better control the air-controlled reversing valve 22, the X1 interface of the air-controlled reversing valve 22 is connected to the electromagnetic air-controlled valve 21. When the electromagnet YV13 of the electromagnetic air-controlled valve 21 is energized, the electromagnetic air-controlled valve 21 works in the right position, and the X1 interface of the air-controlled reversing valve 22 is ventilated. At this time, the air-controlled reversing valve 22 works in the left position, and the oil circuit L6 is connected to the oil circuit L11. When the electromagnet YV13 loses power, the electromagnetic air-controlled valve 21 works in the left position, X1 is deflated, the air-controlled reversing valve 22 works in the right position, and the oil circuit L6 is connected to the oil circuit L7 to reach a pressure relief state.

[0077] like Figure 1 As shown, the safety clamp is in the braking state, that is, the brake state. At this time, the electromagnets YV13, YV14, YV15 and YV16 are de-energized, and the corresponding air-controlled reversing valve 22, the first solenoid reversing valve 23, the second solenoid reversing valve 24 and the third solenoid reversing valve 31 are all in the right position. The oil circuits L1, L2 and L9 are connected to the oil tank, the oil circuits L1, L3, L4 and L8 are connected to the oil tank, and the oil circuit L6 is connected to the oil circuit L7.

[0078] If in the braking state, originally in the power-off state, the first solenoid reversing valve 23 should be in the right position, but the first solenoid reversing valve 23 fails and it still remains in the left position. At this time, the oil circuit L6 is connected with the oil circuit L3. Since the oil circuit L6 and the oil circuit L7 are connected, the corresponding oil circuit L3 is connected to the oil tank through the oil circuit L6, which can still achieve the pressure relief effect.

[0079] If the rig is in parking state, that is, the drilling rig is not working or the driller temporarily leaves the operating console, press the parking brake button to apply the brake to prevent the traveling block from falling.

[0080] At this time Figure 3 As shown, the solenoid valve YV13 is energized, so that the solenoid air-controlled valve 21 works in the right position and the air-controlled reversing valve 22 works in the left position; the solenoid valves YV14, YV15, and YV16 are de-energized, so that the first solenoid reversing valve 23, the second solenoid reversing valve 24, and the third solenoid reversing valve 31 all work in the right position; in this way, the pressure oil circuit L1 and the oil circuit L3 of the safety clamp can return to the oil tank through the oil circuits L8 and L9, so that the safety clamp brakes.

[0081] For details, see Figure 4 As shown, "+" means powered on and "-" means powered off.

[0082] In order to better control the left and right working calipers and to better perform the braking state, the X2 interface of the first hydraulically controlled reversing valve 25 and the X3 interface of the second hydraulically controlled reversing valve 26 are connected to the oil circuit L3 through the oil circuit L5.

[0083] like Figure 1As shown, when there is no pressure in the oil circuit L3, the first hydraulically controlled reversing valve 25 and the second hydraulically controlled reversing valve 26 are both operated in the right position through the oil circuit L5. At this time, the oil circuit L15 is connected with the oil circuit L20, that is, the right working caliper is connected with the oil source P2 interface, and the right working caliper is in the braking state, that is, the braking state, and the oil circuit L18 is connected with the oil circuit L21, that is, the left working caliper is connected with the oil source P3 interface, and the left working caliper is in the braking state, that is, the braking state.

[0084] That is, when the safety caliper is in the braking state, the left and right working calipers can also be in the braking state through the oil circuit L5.

[0085] In normal working conditions, the left and right working clamps and the safety clamps do not need to brake. Figure 3 As shown, electromagnets YV13, YV14, YV15 and YV16 are all energized, the electromagnetic air-controlled valve 21 works in the right position, the air-controlled reversing valve 22, the first electromagnetic reversing valve 23, the second electromagnetic reversing valve 23 and the third electromagnetic reversing valve 31 all work in the left position. At this time, the P1 interface of the oil source supplies oil, and the safety clamp is supplied with pressure through the oil circuit L11, the oil circuit L6, the oil circuit L3 and the oil circuit L1, so that it reaches the brake release state.

[0086] The corresponding left working clamp control module 29 and right working clamp control module 28 are also connected to the working clamp control module 27, wherein the A interface of the working clamp control module 27 is connected to the G1 interface of the right working clamp control module 28 and the G2 interface of the left working clamp control module 29 through the oil circuit L13, wherein the G1 interface and the G2 interface are control interfaces, which can control the oil pressure input from the SP1 interface and the SP2 interface to the BR1 interface and the BR2 interface, and the P interface of the working clamp control module 27 is connected to the oil circuit L11 through the oil circuit L12. When the P1 interface is supplied with oil, the G1 interface and the G2 interface of the left and right working clamp control modules are supplied with oil through the oil circuit L11, the oil circuit L12, the working clamp control module 27 and the oil circuit L13, so as to control the oil pressure flowing out from the BR1 and BR2 interfaces, and at the same time, the L interface of the working clamp control module 27 is connected to the oil tank.

[0087] like Figure 2 As shown, when all the clamps are in the brake-released state, the oil circuit L5 is full of pressure. At this time, the first hydraulically controlled reversing valve 25 and the second hydraulically controlled reversing valve 26 are both working in the left position, and the oil circuits flowing out from the BR1 interface and the BR2 interface are respectively connected to the oil circuit L20 and the oil circuit L21, so that pressure can exist in both the left and right working clamps. The working clamp control module 27 controls the size of the hydraulic oil pressure entering the G2 and G1 interfaces of the left and right working clamp control modules, so that the BR2 / BR1 ports of the left / right working clamp control modules output pressures of different sizes, thereby obtaining different braking torques.

[0088] Under normal working conditions, there is no need to supply oil to the left and right working clamp control modules, that is, the left and right working clamps will not brake, ensuring the normal operation of the device.

[0089] like Figure 1 As shown, the oil circuit L1 is connected to the oil circuit L3 via a first hydraulic hose 41 , wherein both ends of the first hydraulic hose 41 are connected via a first quick-change connector 216 and a fourth quick-change connector 33 .

[0090] The oil circuit L22 and the oil circuit L20 are connected via a second hydraulic hose 42 , and both ends of the second hydraulic hose 42 are connected via a second quick-change connector 217 and a fifth quick-change connector 34 .

[0091] The oil circuit L23 and the oil circuit L21 are connected via a third hydraulic hose 43 , and both ends of the third hydraulic hose 43 are connected via a third quick-change connector 218 and a sixth quick-change connector 35 .

[0092] In order to better detect the working status of the left and right working clamps and the safety clamps and the entire control system, a first pressure sensor 32.1 is installed on the oil circuit L1, a second pressure sensor 32.2 is installed on the oil circuit L22, a third pressure sensor 32.3 is installed on the oil circuit L23, a fourth pressure sensor 211 is installed on the oil circuit L11, and a fifth pressure sensor 212 is installed on the oil circuit L6.

[0093] A first pressure gauge 213 is installed on the oil circuit L3 , a second pressure gauge 214 is installed on the oil circuit L20 , and a third pressure gauge 215 is installed on the oil circuit L21 .

[0094] A pressure switch 210 is installed on the oil circuit L11.

[0095] It should be understood that the above description of the specific embodiments of the present invention is only for illustrating the technical route and features of the present invention, and its purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly, but the present invention is not limited to the above specific implementation methods. Any changes or modifications made within the scope of the claims of the present invention should be included in the protection scope of the present invention.

Claims

1. An electro-hydraulic control system for a drilling rig disc brake, characterized in that: It includes an oil source, an oil tank, a safety clamp (36) and a safety clamp control oil circuit; The safety clamp (36) is connected to the oil source and the oil tank via the safety clamp control oil circuit, a safety clamp oil return oil circuit is connected in parallel to the safety clamp control oil circuit, and the safety clamp oil return oil circuit connects the safety clamp (36) and the oil tank.

2. The electro-hydraulic control system for a drilling rig disc brake according to claim 1, characterized in that: It also includes a pneumatically controlled reversing valve (22), a first electromagnetic reversing valve (23) and a second electromagnetic reversing valve (24), and the safety clamp oil return circuit includes a first oil return circuit; The first electromagnetic reversing valve (23) and the air-controlled reversing valve (22) are connected in series on the safety clamp control oil circuit, and the second electromagnetic reversing valve (24) is arranged on the first oil return oil circuit and is connected in parallel with the first electromagnetic reversing valve (23).

3. The electro-hydraulic control system for drilling rig disc brake according to claim 2, characterized in that: The first oil return oil circuit comprises an oil circuit L1, an oil circuit L3, an oil circuit L4 and an oil circuit L8 which are connected in sequence, the oil circuit L1 is connected to the safety clamp, the oil circuit L8 is connected to the oil tank, and the second electromagnetic reversing valve (24) is arranged on the oil circuit L4; The safety clamp control oil circuit comprises a third oil return oil circuit connecting the safety clamp and the oil tank, the third oil return oil circuit comprises an oil circuit L1, an oil circuit L3, an oil circuit L6 and an oil circuit L7 which are connected in sequence, the oil circuit L7 is connected to the oil tank, and the first electromagnetic reversing valve (23) and the air-controlled reversing valve (22) are connected in series on the oil circuit L6.

4. The electro-hydraulic control system for drilling rig disc brake according to claim 3, characterized in that: The first electromagnetic reversing valve (23) is connected to the oil circuit L8.

5. An electro-hydraulic control system for a drilling rig disc brake according to any one of claims 1 to 4, characterized in that: It also includes a third electromagnetic reversing valve (31), the safety clamp oil return circuit also includes a second oil return circuit, and the third electromagnetic reversing valve (31) is arranged on the second oil return circuit.

6. The electro-hydraulic control system for drilling rig disc brake according to claim 5, characterized in that: The second oil return oil circuit comprises an oil circuit L1, an oil circuit L2 and an oil circuit L9 which are connected in sequence, the oil circuit L1 is connected to the safety clamp, the oil circuit L9 is connected to the oil tank, and the third electromagnetic reversing valve (31) is arranged on the oil circuit L9.

7. The electro-hydraulic control system for drilling rig disc brake according to claim 1, characterized in that: The safety clamp control oil circuit comprises an oil inlet oil circuit connecting the safety clamp and the oil source, the oil inlet oil circuit comprises an oil circuit L1, an oil circuit L3, an oil circuit L6 and an oil circuit L11 which are connected in sequence, the oil circuit L1 is connected to the safety clamp (36), the oil circuit L11 is connected to the oil source, a pressure switch (210) and a fourth sensor (211) are arranged on the oil circuit L11, and a fifth sensor (212) is arranged on the oil circuit L6.

8. The electro-hydraulic control system for drilling rig disc brake according to claim 1, characterized in that: It also comprises a left working clamp (38) and a left control oil circuit connected to the left working clamp (38), the left control oil circuit comprising an oil circuit L23, an oil circuit L21, an oil circuit L18 and an oil circuit L17 connected to an oil source P3 interface, a second hydraulically controlled reversing valve (26) is arranged on the oil circuit L21, the second hydraulically controlled reversing valve (26) is connected to a left working clamp control module (29), the left working clamp control module (29) is connected to an oil tank via an oil circuit L10, and an X3 interface of the second hydraulically controlled reversing valve (26) is connected to the safety clamp control oil circuit via an oil circuit L5; A third pressure sensor (32.3) is installed on the oil circuit L23 of the left control oil circuit close to the left working pliers.

9. The electro-hydraulic control system for drilling rig disc brake according to claim 1, characterized in that: It also comprises a right working clamp (37) and a right control oil circuit connected to the right working clamp (37), wherein the right control oil circuit comprises an oil circuit L22 connected to an oil source P2 interface, an oil circuit L20, an oil circuit L15 and an oil circuit 14, wherein a first hydraulically controlled reversing valve (25) is arranged on the oil circuit L20, wherein the first hydraulically controlled reversing valve (25) is connected to a right working clamp control module (28), wherein the right working clamp control module (28) is connected to an oil tank via the oil circuit L10, and an X2 interface of the first hydraulically controlled reversing valve (25) is connected to the safety clamp control oil circuit via the oil circuit L5; A second pressure sensor (32.2) is installed on the oil circuit L22 of the right control oil circuit close to the oil circuit working pliers.

10. The electro-hydraulic control system for drilling rig disc brake according to claim 1, characterized in that: It also includes a working clamp control module (27), the working clamp control module (27) is connected to the oil source P1 interface through oil circuits L11 and L12, and the working clamp control module is connected to the G2 interface of the left working clamp control module (29) and the G1 interface of the right working clamp control module (28) through oil circuit L13; A first pressure sensor (32.1) is installed on the oil circuit L1 of the safety clamp control oil circuit close to the safety clamp.

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