Search

CN-122014698-A - Energy-saving hydraulic control system suitable for multiple machines and single machine double pumps

CN122014698ACN 122014698 ACN122014698 ACN 122014698ACN-122014698-A

Abstract

The invention provides an energy-saving hydraulic control system suitable for a single machine with multiple machines, which relates to the technical field of petroleum drilling and comprises a single machine double pump group, a parallel reversing valve group and a multi-way output valve group, wherein the single machine double pump group comprises a main motor, a main pump and a slave pump, the main motor drives the main pump and the slave pump to rotate, an input port of the parallel reversing valve group is connected with output ports of the main pump and the slave pump and is used for limiting the outlet pressure of the main pump and the slave pump and controlling the flow direction of hydraulic oil in the multi-way output valve group, and an input port of the multi-way output valve group is connected with an output port of the parallel reversing valve group and is used for controlling the output of the hydraulic oil from different output ports. The invention adopts the double pumps which are connected with the main motor in a transmission way, the double pumps are coaxially connected in series with the auxiliary pump, the output of the main pump and the auxiliary pump is controlled in a manual reversing way, and meanwhile, the energy-saving output of the main pump and the auxiliary pump is realized by utilizing the load feedback of the machine tool, so that the invention is suitable for the working requirements of various hydraulic machine tools, and has simple and convenient operation and wide applicability.

Inventors

  • LIU ZHIGANG
  • JIANG YONGBING
  • SHEN HUI
  • SHI YUYING

Assignees

  • 江苏如石机械股份有限公司

Dates

Publication Date
20260512
Application Date
20260120

Claims (8)

  1. 1. The energy-saving hydraulic control system suitable for the single machine and the double pumps of the multiple machines is characterized by comprising a single machine double pump group (3), a parallel operation reversing valve group (4) and a multi-way output valve group (5); The single-machine double-pump set (3) comprises a main motor (3.1), and a main pump (3.2) and a slave pump (3.3) which are electrically connected with the main motor, wherein the main motor (3.1) drives the main pump (3.2) and the slave pump (3.3) to rotate, and the main pump (3.2) and the slave pump (3.3) are used for absorbing hydraulic oil from an oil tank (1) and conveying the hydraulic oil to the parallel operation reversing valve set (4); the input port of the parallel operation reversing valve group (4) is connected with the output ports of the main pump (3.2) and the slave pump (3.3), and is used for limiting the outlet pressure of the main pump (3.2) and the slave pump (3.3) and controlling the flow direction of hydraulic oil in the multi-way output valve group; And an input port of the multi-way output valve group (5) is connected with an output port of the parallel operation reversing valve group (4) and is used for controlling the output of hydraulic oil from different output ports.
  2. 2. The energy-saving hydraulic control system suitable for single machine double pumps of multiple machines according to claim 1, wherein the parallel operation reversing valve group (4) comprises a manual reversing valve (4.5), a first one-way valve (4.1) and a second one-way valve (4.2), and the multi-way output valve group comprises a first hydraulic reversing valve (5.1) and a second hydraulic reversing valve (5.2); the hydraulic oil of the main pump is connected to the high-pressure input port of the first hydraulic control reversing valve (5.1) through the first one-way valve (4.1), and the hydraulic oil of the slave pump is connected to the high-pressure input port of the second hydraulic control reversing valve (5.2) through the second one-way valve (4.2).
  3. 3. The energy-saving hydraulic control system suitable for the single machine double pump of the multi-machine according to claim 2, wherein the first hydraulic control reversing valve (5.1) and the second hydraulic control reversing valve (5.2) comprise two control ports, the manual reversing valve (4.5) comprises two control ends, the two control ends are respectively correspondingly connected with the two control ports of the first hydraulic control reversing valve (5.1) and the second hydraulic control reversing valve (5.2), and the hydraulic oil is output in a shunt way after being controlled by the manual reversing valve.
  4. 4. The energy-saving hydraulic control system suitable for the single machine double pump of the multi-machine according to claim 3, wherein the multi-way output valve group (5) further comprises a first pressure reducing valve (5.4), a second pressure reducing valve (5.3) and a throttle valve (5.5), wherein the first pressure reducing valve (5.4) is used for adjusting the output pressure of the output port P3, the second pressure reducing valve (5.3) is used for adjusting the output pressure of the output port P2, and the output ports of the first hydraulic control reversing valve (5.1) and the second hydraulic control reversing valve (5.2) are also load pressure ports; One path of hydraulic oil output port on the left side of the first hydraulic control reversing valve (5.1) is connected to the output port P3 through the first pressure reducing valve (5.4), one path of hydraulic oil output port on the right side of the first hydraulic control reversing valve (5.1) is connected to the output port P2 through the second pressure reducing valve (5.3), and the other path of hydraulic oil output port is connected to the output port P1 through the throttle valve (5.5); the hydraulic oil output port on the left side of the second hydraulic control reversing valve (5.2) is a closed port, the slave pump is in a low-pressure standby state, no hydraulic oil is output, the hydraulic oil on the right side of the second hydraulic control reversing valve (5.2) is directly connected to the output port P2, and the hydraulic oil output port of the second hydraulic control reversing valve (5.2) is connected with the load feedback port of the slave pump.
  5. 5. A single machine double pump energy saving hydraulic control system according to claim 3, wherein the multi-way output valve set (5) further comprises a shuttle valve (12), the hydraulic oil output port on the left side of the first hydraulic control reversing valve (5.1) is connected with the first input port of the shuttle valve (12), the hydraulic oil output port on the right side of the first hydraulic control reversing valve is connected with the second input port of the shuttle valve (12), and the output port of the shuttle valve (12) is connected with the main pump load feedback port.
  6. 6. The energy-saving hydraulic control system suitable for single machine double pumps of multiple machines according to claim 5, characterized in that the reversing of the first hydraulic reversing valve (5.1) and the second hydraulic reversing valve (5.2) is controlled by the manual reversing valve (4.5); When the manual reversing valve (4.5) is at the left position, the first hydraulic reversing valve (5.1) and the second hydraulic reversing valve (5.2) are simultaneously reversed to the left position, and hydraulic oil is output from the output port P3, so that medium-pressure medium-flow output is realized; When the manual reversing valve (4.5) is at the right position, the first hydraulic reversing valve (5.1) and the second hydraulic reversing valve (5.2) are simultaneously reversed to the right position, hydraulic oil of the first hydraulic reversing valve is respectively output from P1 and P2 to realize high-pressure small-flow output, hydraulic oil of the second hydraulic reversing valve is directly output from an output port P2, and at the moment, hydraulic oil output from the output port P2 is simultaneously output from a main pump and a slave pump to realize medium-pressure large-flow output.
  7. 7. The energy-saving hydraulic control system suitable for single machine double pumps with multiple machines according to claim 6, wherein when the manual reversing valve (4.5) is in the middle position, the first hydraulic reversing valve (5.1) and the second hydraulic reversing valve (5.2) have no control oil input, at this time, the first hydraulic reversing valve (5.1) and the second hydraulic reversing valve (5.2) are in the middle position, and the main pump and the slave pump are in a low-pressure standby state and have no hydraulic oil output.
  8. 8. The energy-saving hydraulic control system suitable for the single machine with multiple machines and double pumps according to claim 1 is characterized in that hydraulic oil output by the output ports P1, P2 and P3 is respectively input to corresponding external oil return ports after being used by the hydraulic machines, and the hydraulic oil of the external oil return ports is cooled by an air cooler (7) and filtered by an oil return filter (8) and then returns to the oil tank (1).

Description

Energy-saving hydraulic control system suitable for multiple machines and single machine double pumps Technical Field The invention relates to the technical field of petroleum drilling, in particular to an energy-saving hydraulic control system suitable for multiple machines and single machines. Background In the petroleum drilling and repairing operation process, the conventional hydraulic control system is particularly commonly used, and hydraulic machines suitable for the hydraulic control system are single and have no load feedback output. Meanwhile, in the long-time continuous operation process, the working system can generate heat, so that the use of the hydraulic element is seriously affected. Disclosure of Invention The present invention is directed to a single machine, dual pump, and energy-efficient hydraulic control system for solving one or more of the above-mentioned problems. The energy-saving hydraulic control system comprises a single machine double pump unit, a parallel operation reversing valve unit and a multi-way output valve unit, wherein the single machine double pump unit comprises a main motor, a main pump and a slave pump which are electrically connected with the main motor, the main motor drives the main pump and the slave pump to rotate, and the main pump and the slave pump are used for absorbing hydraulic oil from an oil tank and conveying the hydraulic oil to the parallel operation reversing valve unit; the input port of the multi-way output valve group is connected with the output port of the parallel operation reversing valve group and is used for adjusting the output pressure of the machine, feeding back the output load and controlling the output of hydraulic oil from different output ports. Preferably, the parallel operation reversing valve group comprises a manual reversing valve, a first one-way valve 1 and a second one-way valve, and the multi-way output valve group comprises an output valve block, a first hydraulic control reversing valve and a second hydraulic control reversing valve which are arranged on the top surface of the output valve block; the hydraulic oil of the main pump is connected to the high-pressure input port of the first hydraulic control reversing valve through the first one-way valve, and the hydraulic oil of the slave pump is connected to the high-pressure input port of the second hydraulic control reversing valve through the second one-way valve. Preferably, the first hydraulic control reversing valve and the second hydraulic control reversing valve both comprise two control ports, the manual reversing valve comprises two control ends, the two control ends are respectively and correspondingly connected with the two control ports of the first hydraulic control reversing valve and the second hydraulic control reversing valve, and hydraulic oil is output in a branching way after being controlled by the manual reversing valve. Preferably, the parallel operation reversing valve group comprises a first overflow valve and a second overflow valve, wherein the first overflow valve is a master pump relief valve and is used for limiting the highest pressure of the master pump, and the second overflow valve is a slave pump relief valve and is used for limiting the highest pressure of the slave pump. Preferably, the multi-way output valve group further comprises a first pressure reducing valve, a second pressure reducing valve and a throttle valve, wherein the first pressure reducing valve is used for adjusting the output pressure of the P3 output port, and the second pressure reducing valve is used for adjusting the output pressure of the P2 output port; One path of hydraulic oil output port on the left side of the first hydraulic control reversing valve is connected to the output port P3 through a second pressure reducing valve, and the other path of hydraulic oil output port on the right side of the first hydraulic control reversing valve is connected to the output port P2 through a throttle valve; The left hydraulic oil output port of the second hydraulic control reversing valve is a closed port, the slave pump is in a low-pressure standby state, no hydraulic oil is output, the right hydraulic oil of the second hydraulic control reversing valve is directly connected to the output port P2, and the hydraulic oil output port of the second hydraulic control reversing valve 2 is connected with a load feedback port of the slave pump. Preferably, the multi-way output valve group further comprises a shuttle valve, the hydraulic oil output port on the left side of the first hydraulic control reversing valve is connected with the first input port of the shuttle valve, the hydraulic oil output port on the right side of the first hydraulic control reversing valve is connected with the second input port of the shuttle valve, and the output port of the shuttle valve is connected with the load feedback port of the main pump. Preferably, the reversing of the first hydrauli