Drilling machine hydraulic system and drilling machine

Abstract

The utility model belongs to the technical field of drilling machines, and discloses a drilling machine hydraulic system and a drilling machine, the drilling machine hydraulic system comprises a first liquid path, a second liquid path and a communication liquid path, the first liquid path comprises a first pump, a first working valve and a propulsion motor, and an oil return port of the first pump is communicated with an oil inlet of the first working valve; a working oil port a1 of the first working valve communicates with the oil inlet end of the propulsion motor, the second liquid path comprises a second pump, a second working valve and a rotary motor, an oil return port of the second pump communicates with an oil inlet of the second working valve, a working oil port b1 of the second working valve communicates with the oil inlet end of the rotary motor, and the communicating liquid path comprises a communicating oil pipe, an overflow valve and a one-way valve. The overflow valve and the one-way valve are arranged on the communicating oil pipe; the drilling machine comprises the drilling machine hydraulic system and further comprises a drill bit connected with the rotary motor through a planetary reducer. According to the drilling machine hydraulic system and the drilling machine, the energy utilization rate is effectively improved, oil consumption is reduced, and the heating value of the hydraulic system is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of drilling rigs, in particular to a drilling rig hydraulic system and a drilling rig. Background Art

[0002] A drilling rig hydraulic system in the prior art Figure 1 As shown, it comprises two fluid circuits. The first fluid circuit includes a first pump 11', a first working valve 12', and a propulsion motor 13'. The second fluid circuit includes a second pump 21', a second working valve 22', and a swing motor 23'. The oil inlet of the first pump 11' is connected to the oil tank, the oil outlet of the first pump 11' is connected to the oil inlet of the first working valve 12', and the working oil port of the first working valve 12' is connected to the propulsion motor 13'. The oil inlet of the second pump 21' is connected to the oil tank, the oil outlet of the second pump 21' is connected to the oil inlet of the second working valve 22', and the working oil port of the second working valve 22' is connected to the swing motor 23'. The swing motor 23' is connected to the drill bit of the drilling rig via a reducer. The swing motor 23' typically uses a large-displacement cable motor, and the reducer is typically a parallel shaft reducer 24'. It can be seen from the above hydraulic structure that the two fluid circuits are independent of each other. When the hydraulic oil inside each fluid circuit exceeds the flow required by the working components inside the series oil circuit, the excess flow directly overflows back to the oil tank, which will cause energy loss in the hydraulic system. Utility Model Content

[0003] The purpose of the utility model is to provide a drilling rig hydraulic system and a drilling rig, which have a simple structure and can effectively improve the energy utilization rate of the drilling rig hydraulic system and reduce fuel consumption.

[0004] To achieve this purpose, the present invention adopts the following technical solutions:

[0005] A drilling rig hydraulic system includes a first fluid circuit, a second fluid circuit and a connecting fluid circuit; wherein,

[0006] The first fluid circuit includes a first pump, a first working valve, and a propulsion motor, wherein the oil outlet of the first pump is connected to the oil inlet of the first working valve, and the working oil port a1 of the first working valve is connected to the oil inlet of the propulsion motor; the second fluid circuit includes a second pump, a second working valve, and a swing motor, wherein the oil outlet of the second pump is connected to the oil inlet of the second working valve, and the working oil port b1 of the second working valve is connected to the oil inlet of the swing motor;

[0007] The communication oil path comprises a communication oil pipe, an overflow valve and a one-way valve, a first end of the communication oil pipe is communicated with a communication pipeline between the first working valve and the propulsion motor, a second end of the communication oil pipe is communicated with a communication pipeline between the second working valve and the rotary motor, the overflow valve and the one-way valve are both arranged on the communication oil pipe, and the one-way valve is configured to unidirectionally guide the communication oil pipe from the first liquid path to the second liquid path.

[0008] Preferably, the one-way valve and the overflow valve are arranged in sequence from the first end to the second end of the communication oil pipe.

[0009] Preferably, the rotary motor is connected with a planetary reducer.

[0010] Preferably, the rotary motor is a gear motor.

[0011] Preferably, the first working valve is a three-position four-way directional valve, an oil outlet end of the propulsion motor is communicated with a working oil port b2 of the first working valve, and a return oil port of the first working valve is communicated with an oil tank.

[0012] Preferably, the second working valve is a three-position four-way directional valve, an oil outlet end of the rotary motor is communicated with a working oil port b2 of the second working valve, and a return oil port of the second working valve is communicated with an oil tank.

[0013] Preferably, the first working valve and the second working valve are both electromagnetic directional valves, manual directional valves or hydraulic directional valves.

[0014] Preferably, a first oil pipe is communicated between a working oil port a1 of the first working valve and a liquid inlet end of the propulsion motor, a second oil pipe is communicated between a working oil port b1 of the second working valve and a liquid inlet end of the rotary motor, a first end of the communication oil pipe is communicated with the first oil pipe, and a second end of the communication oil pipe is communicated with the second oil pipe.

[0015] Preferably, the rotary motor is connected with a planetary reducer.

[0016] A drilling machine comprises the drilling machine hydraulic system of any one of the above, and further comprises a drill bit, the rotary motor is connected with the drill bit through the planetary reducer.

[0017] Beneficial effects:

[0018] The drilling machine hydraulic system provided by the utility model is provided with a communication liquid path capable of being communicated between the first liquid path and the second liquid path. Specifically, the communication liquid path comprises an oil pipe, an overflow valve and a check valve, the first end of the communication oil pipe is communicated with the communication pipeline between the first working valve and the propulsion motor, the second end of the communication oil pipe is communicated with the communication pipeline between the second working valve and the rotary motor, and the overflow valve and the check valve are arranged on the communication oil pipe, and the check valve is unidirectionally communicated with the communication oil pipe from the first liquid path to the second liquid path. When the drill bit of the drilling machine performs the conventional rock drilling work, the pressure of the propulsion motor and the rotary motor rises, the pressure of the propulsion motor rises but is not higher than the set pressure of the overflow valve, the overflow valve is not opened, and the flow of the first pump and the second pump is not combined.

[0019] The drilling machine provided by the utility model applies the drilling machine hydraulic system, can effectively improve the energy utilization rate of the drilling machine hydraulic system, and effectively reduces the oil consumption. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a schematic view of the drilling machine hydraulic system provided in the prior art;

[0021] Figure 2 It is a schematic view of the drilling machine hydraulic system provided by the utility model.

[0022] In the drawing:

[0023] 11', first pump; 12', first working valve; 13', propulsion motor;

[0024] 21', second pump; 22', second working valve; 23', rotary motor; 24', parallel shaft speed reducer;

[0025] 11, first pump; 12, first working valve; 13, propulsion motor; 14, first oil pipe;

[0026] 21, second pump; 22, second working valve; 23, rotary motor; 24, planetary speed reducer; 25, second oil pipe;

[0027] 31, communication oil pipe; 32, overflow valve; 33, check valve;

[0028] 4, oil tank. DETAILED DESCRIPTION

[0029] The utility model will be described further in detail below in combination with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the utility model, and not to limit the utility model. In addition, it should be noted that, in order to facilitate the description, only the part related to the utility model is shown in the drawings, not all structures.

[0030] In the description of the utility model, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0031] In the utility model, unless otherwise explicitly specified and limited, the first feature is "on" or "below" the second feature, which can include direct contact between the first and second features, or indirect contact between the first and second features through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0032] In the description of the embodiment, the terms "up", "down", "right", etc. The orientation or position relationship shown in the drawing is only for the convenience of description and simplification of operation, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" are only used to distinguish in the description, and have no special meaning.

[0033] The embodiment provides a drilling rig hydraulic system. Refer to Figure 2As shown, the drilling rig hydraulic system includes a first fluid circuit, a second fluid circuit, and a connecting fluid circuit. The first fluid circuit includes a first pump 11, a first working valve 12, and a propulsion motor 13. The oil outlet of the first pump 11 is connected to the oil inlet of the first working valve 12, and the working oil port a1 of the first working valve 12 is connected to the oil inlet of the propulsion motor 13. The second fluid circuit includes a second pump 21, a second working valve 22, and a swing motor 23. The oil outlet of the second pump 21 is connected to the oil inlet of the second working valve 22, and the working oil port b1 of the second working valve 22 is connected to the oil inlet of the swing motor 23. The connecting fluid circuit includes a connecting oil pipe 31, a relief valve 32 and a one-way valve 33. The first end of the connecting oil pipe 31 is connected to the connecting pipe between the first working valve 12 and the propulsion motor 13, and the second end of the connecting oil pipe 31 is connected to the connecting pipe between the second working valve 22 and the rotary motor 23. The relief valve 32 and the one-way valve 33 are both arranged on the connecting oil pipe 31. The one-way valve 33 is configured to unidirectionally guide the connecting oil pipe 31 from the first fluid circuit to the second fluid circuit.

[0034] In this embodiment, the drilling rig hydraulic system is equipped with a connecting fluid circuit that connects the first and second fluid circuits. Specifically, the connecting fluid circuit includes a fluid pipe, a relief valve 32, and a check valve 33. The first end of the connecting fluid pipe 31 connects the first working valve 12 to the propulsion motor 13, while the second end of the connecting fluid pipe 31 connects the second working valve 22 to the swing motor 23. Both the relief valve 32 and the check valve 33 are located on the connecting fluid pipe 31. The check valve 33 provides one-way flow from the first fluid circuit to the second fluid circuit. During normal rock drilling, the pressure in the propulsion motor 13 and the swing motor 23 increases. If the pressure in the propulsion motor 13 increases but does not exceed the set pressure of the relief valve 32, the relief valve 32 does not open, and the flows from the first pump 11 and the second pump 21 do not merge. When the drill bit is drilling hard rock, the propulsion speed slows down, and the pressure of the propulsion motor 13 rises to exceed the set pressure of the relief valve 32. The relief valve 32 opens, and the hydraulic oil exceeding the overflow pressure can be transported from the first liquid circuit to the second liquid circuit through the connecting pipeline to supply to the rotary motor 23, so that this part of the hydraulic oil can be fully utilized, which can effectively improve the energy utilization rate of the drilling rig hydraulic system and effectively reduce fuel consumption.

[0035] Specifically, by providing the one-way valve 33 , the one-way flow of the hydraulic oil can be effectively ensured, and the backflow of the hydraulic oil can be prevented.

[0036] In this embodiment, the one-way valve 33 and the relief valve 32 are arranged sequentially from the first end to the second end of the connecting oil pipe 31. This arrangement ensures that the hydraulic oil flowing to the relief valve 32 flows in a single direction, preventing the return flow of some oil from affecting the operation of the relief valve 32.

[0037] In the embodiment, the rotary motor 23 is connected with the planetary reducer 24, and the rotary motor 23 is a gear motor. In the existing hydraulic system, the parallel shaft reducer is commonly used as the speed reducer, and the trochoidal motor is commonly used as the rotary motor 23. The parallel shaft reducer has a small speed ratio, and thus a large ratio between the displacement of the rotary motor 23 and the displacement of the second pump 21 is required. Finally, the speed ratio of the parallel shaft reducer and the speed ratio between the rotary motor 23 and the second pump 21 are combined to obtain the final required speed ratio. At this time, the load of the rotary motor 23 is large, and the output speed of the rotary motor 23 is low. The trochoidal motor has low efficiency under the condition of low speed and large load. Therefore, the efficiency of the hydraulic system is low during operation, and the heat generation of the hydraulic system is large, so that the oil consumption of the system is high, and the reliability of the hydraulic system is low. In the embodiment, the gear motor with small displacement is matched with the planetary reducer 24 with large speed ratio. At this time, the speed ratio between the displacement of the second pump 21 and the displacement of the gear motor is small, the load of the gear motor is low, and the speed of the gear motor is in the high efficiency zone. At this time, the efficiency of the gear motor can be above 0.92. The speed ratio of the planetary reducer 24 is large, so that the final speed ratio obtained is basically the same as that obtained by the traditional matching mode, but the transmission efficiency of the whole system is effectively improved.

[0038] In the embodiment, the first working valve 12 is a three-position four-way directional valve, and the oil outlet of the propulsion motor 13 is communicated with the working oil port b2 of the first working valve 12, and the oil return port of the first working valve 12 is communicated with the oil tank 4. Specifically, when the right position of the first working valve 12 is in the working position, the oil inlet of the first working valve 12 is communicated with the working oil port a1, and the oil return port of the first working valve 12 is communicated with the working oil port a2; when the left position of the first working valve 12 is in the working position, the oil inlet of the first working valve 12 is communicated with the working oil port a2, and the oil return port of the first working valve 12 is communicated with the working oil port a1.

[0039] In the embodiment, the second working valve 22 is a three-position four-way directional valve, and the oil outlet of the rotary motor 23 is communicated with the working oil port b2 of the second working valve 22, and the oil return port of the second working valve 22 is communicated with the oil tank 4. Specifically, when the right position of the second working valve 22 is in the working position, the oil inlet of the second working valve 22 is communicated with the working oil port b1, and the oil return port of the second working valve 22 is communicated with the working oil port b2; when the left position of the second working valve 22 is in the working position, the oil inlet of the second working valve 22 is communicated with the working oil port b2, and the oil return port of the second working valve 22 is communicated with the working oil port b1.

[0040] In the embodiment, the first working valve 12 and the second working valve 22 are both electromagnetic directional valves. In this way, the response of the valve body when switching the working position is reliable and rapid.

[0041] Specifically, the first oil pipe 14 is communicated between the working oil port a1 of the first working valve 12 and the inlet of the propulsion motor 13, the second oil pipe 25 is communicated between the working oil port b1 of the second working valve 22 and the inlet of the rotary motor 23, the first end of the communication oil pipe 31 is communicated with the first oil pipe 14, and the second end of the communication oil pipe 31 is communicated with the second oil pipe 25. Specifically, when the pressure of the propulsion motor 13 rises to exceed the set pressure of the overflow valve 32, the overflow valve 32 is opened, and the flow path of the hydraulic oil exceeding the overflow pressure is the first oil pipe 14, the communication oil pipe 31, the second oil pipe 25 in turn, and is delivered to the inlet of the rotary motor 23 through the second oil pipe 25.

[0042] In the embodiment, the inlet of the first pump 11 and the inlet of the second pump 21 are both communicated with the oil tank 4, so that the backflow hydraulic oil is finally returned to the oil tank 4.

[0043] The embodiment also provides a drilling machine, which comprises the drilling machine hydraulic system and a drill bit. The rotary motor 23 is connected with the drill bit through the planetary reducer 24. The drilling machine uses the drilling machine hydraulic system, so that the drilling machine has the beneficial effects of the drilling machine hydraulic system, that is, the energy utilization rate of the drilling machine hydraulic system is effectively improved, the oil consumption is reduced, and the heat generation of the hydraulic system is reduced.

[0044] Obviously, the above embodiment of the utility model is only for the purpose of clear illustration, and is not a limitation on the embodiments of the utility model. For those skilled in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the utility model. Here, it is unnecessary and impossible to enumerate all the embodiments. Any modification, equivalent substitution and improvement within the spirit and principle of the utility model should be included in the protection scope of the utility model claim.

Claims

1. A drilling rig hydraulic system, characterized by, The hydraulic system comprises a first liquid path, a second liquid path and a communication liquid path. The first liquid path comprises a first pump (11), a first working valve (12) and a propulsion motor (13), an oil outlet of the first pump (11) is communicated with an oil inlet of the first working valve (12), and a working oil port a1 of the first working valve (12) is communicated with an oil inlet end of the propulsion motor (13); the second liquid path comprises a second pump (21), a second working valve (22) and a rotary motor (23), an oil outlet of the second pump (21) is communicated with an oil inlet of the second working valve (22), and a working oil port b1 of the second working valve (22) is communicated with an oil inlet end of the rotary motor (23); The communication liquid path comprises a communication oil pipe (31), an overflow valve (32) and a one-way valve (33), a first end of the communication oil pipe (31) is communicated with a communication pipeline between the first working valve (12) and the propulsion motor (13), a second end of the communication oil pipe (31) is communicated with a communication pipeline between the second working valve (22) and the rotary motor (23), the overflow valve (32) and the one-way valve (33) are both arranged on the communication oil pipe (31), and the one-way valve (33) is configured to unidirectionally guide the communication oil pipe (31) from the first liquid path to the second liquid path.

2. The rig hydraulic system of claim 1, wherein, The one-way valve (33) and the overflow valve (32) are sequentially arranged from the first end to the second end of the communication oil pipe (31).

3. The drilling rig hydraulic system of claim 1, wherein, The rotary motor (23) is connected with a planetary reducer (24).

4. The drilling rig hydraulic system of claim 1, wherein, The rotary motor (23) is a gear motor.

5. The drilling rig hydraulic system of claim 1, wherein, The first working valve (12) is a three-position four-way reversing valve, an oil outlet end of the propulsion motor (13) is communicated with a working oil port b2 of the first working valve (12), and a return oil port of the first working valve (12) is communicated with an oil tank (4).

6. The drilling rig hydraulic system of claim 1, wherein, The second working valve (22) is a three-position four-way reversing valve, an oil outlet end of the rotary motor (23) is communicated with a working oil port b2 of the second working valve (22), and a return oil port of the second working valve (22) is communicated with the oil tank (4).

7. The drilling rig hydraulic system of claim 1, wherein, The first working valve (12) and the second working valve (22) are both electromagnetic reversing valves, manual reversing valves or hydraulic control reversing valves.

8. The rig hydraulic system of claim 1, wherein, A first oil pipe (14) is communicated between the working oil port a1 of the first working valve (12) and the liquid inlet end of the propulsion motor (13), a second oil pipe (25) is communicated between the working oil port b1 of the second working valve (22) and the liquid inlet end of the rotary motor (23), the first end of the communication oil pipe (31) is communicated with the first oil pipe (14), and the second end of the communication oil pipe (31) is communicated with the second oil pipe (25).

9. The rig hydraulic system of claim 1, wherein, The rotary motor (23) is connected with a planetary reducer (24).

10. A rig characterized by, The hydraulic system comprises a drill bit, and the rotary motor (23) is connected with the drill bit through the planetary reducer (24).

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