Pump-valve combined electro-hydraulic switching control system

Abstract

The present invention relates to a pump-valve combined electro-hydraulic switching control system, comprising a rotary oil pump, a left-feed travel oil pump, a right-feed travel oil pump, a left travel motor and a right travel motor, wherein the rotary oil pump is connected to the rotary motor oil circuit, the left-feed travel oil pump is connected to the left travel motor oil circuit via a first travel switching valve, and the right-feed travel oil pump is connected to the right travel motor oil circuit via a second travel switching valve; further comprising a confluence switching switch, a confluence oil pump and a confluence switching valve; the confluence oil pump is connected to the confluence switching valve oil circuit, the confluence switching valve is respectively connected to the rotary motor and the feed motor oil circuits, the first travel switching valve is also connected to the feed motor oil circuit, and the second travel switching valve is also connected to the feed motor oil circuit. The present invention integrates the travel, feed and rotary circuits of a trenchless drilling rig to achieve confluence, and adds confluence control, thereby improving the utilization rate of the oil pump and reducing the cost and weight of the oil pump.

Description

Technical Field

[0001] The invention relates to an electro-hydraulic system of a trenchless drilling rig, and in particular to a pump-valve combined electro-hydraulic switching control system. Background Art

[0002] Trenchless construction refers to the use of various rock and soil drilling equipment and technical means to lay, replace and repair various underground pipelines in the case of excavating a very small part of the surface through guiding and directional drilling. It will not hinder traffic, damage green spaces and vegetation, or affect the normal life and work order of shops, hospitals, schools and residents. It solves the interference of traditional excavation construction on residents' lives, as well as the damage and adverse effects on traffic, the environment and the foundations of surrounding buildings.

[0003] The crawler movement of the trenchless drilling rig, the feeding of the power head and the rotation of the power head spindle all require the use of a hydraulic oil pump to drive. In order to ensure the smooth progress of drilling, the travel oil pump, the feeding oil pump and the rotary oil pump are all high-power oil pumps.

[0004] In the actual working process, trenchless drilling rigs will encounter different working conditions. The hydraulic circuits of existing trenchless drilling rigs such as walking, feeding and rotation are independent of each other. Therefore, the oil pump will be idle when performing different operations.

[0005] However, a high-power oil pump will undoubtedly lead to a higher cost and a heavier weight of the trenchless drilling rig; and an idle oil pump will result in a lower utilization rate of the oil pump. Summary of the invention

[0006] The purpose of the present invention is to provide a pump-valve combined electro-hydraulic switching control system to integrate the hydraulic circuits of a trenchless drilling rig such as traveling, feeding and rotating, to achieve confluence, and to add confluence control, so as to achieve confluence operation of the oil pump when performing specific operations, meet the flow and pressure of the oil, ensure smooth drilling, improve the utilization rate of the oil pump, and reduce the cost and weight of the oil pump.

[0007] In order to achieve the above object, the present invention provides the following technical solutions:

[0008] A pump-valve combined electro-hydraulic switching control system, comprising a rotary oil pump, a left-travel feed oil pump, a right-travel feed oil pump, a first travel switching valve, a second travel switching valve, a rotary motor, a feed motor, a left-travel motor and a right-travel motor, wherein the rotary oil pump is connected to the rotary motor oil circuit, the left-travel feed oil pump is connected to the left-travel motor oil circuit via the first travel switching valve, and the right-travel feed oil pump is connected to the right-travel motor oil circuit via the second travel switching valve; further comprising a confluence switching switch, a confluence oil pump, a confluence switching valve and a controller; the confluence oil pump is connected to the confluence switching valve oil circuit, the confluence switching valve is respectively connected to the rotary motor and feed motor oil circuits, the first travel switching valve is also connected to the feed motor oil circuit, and the second travel switching valve is also connected to the feed motor oil circuit.

[0009] Furthermore, it also includes a travel switching switch, a feed handle, a rotation handle, a left travel handle, and a right travel handle.

[0010] Furthermore, the controller is electrically connected to the travel switching switch, the merging switching switch, the feed handle, the slewing handle, the left travel handle, the right travel handle, the slewing oil pump, the feed left travel oil pump, the feed right travel oil pump, the merging oil pump, the first travel switching valve, the second travel switching valve, and the merging switching valve.

[0011] Furthermore, the outlet end of the merging switching valve is connected in parallel with the E-port end of the first traveling switching valve and the E-port end of the second traveling switching valve.

[0012] Furthermore, the confluence switching valve, the first travel switching valve and the second travel switching valve are all two-position six-way electromagnetic reversing valves.

[0013] The beneficial effects of the present invention are: a pump-valve combined electro-hydraulic switching control system integrates the hydraulic circuits of the travel, feed and rotation of the trenchless drilling rig to achieve confluence, and adds a confluence switching switch, a confluence oil pump, and a confluence switching valve to achieve confluence control. When performing specific operations, it can achieve the confluence operation of multiple oil pumps to meet the required oil flow and pressure, ensure the smooth drilling, improve the utilization rate of the oil pump, and reduce the cost and weight of the oil pump, which is conducive to reducing the total cost of the trenchless drilling rig. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the hydraulic system principle of a pump-valve combined electro-hydraulic switching control system of the present invention.

[0015] Figure 2 This is a schematic diagram of the control module principle of a pump-valve combined electro-hydraulic switching control system of the present invention.

[0016] In the figure: 1. Travel switching switch; 2. Converging switching switch; 3. Feed handle; 4. Rotating handle; 51. Left travel handle; 52. Right travel handle; 6. Rotating oil pump; 7. Feed left travel oil pump; 8. Feed right travel oil pump; 9. Converging oil pump; 101. First travel switching valve; 102. Second travel switching valve; 11. Converging switching valve; 12. Controller; 13. Rotating motor; 14. Feed motor; 15. Left travel motor; 16. Right travel motor. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0018] refer to Figure 1 and Figure 2 , a pump-valve combined electro-hydraulic switching control system, comprising a rotary oil pump 6, a left-feed travel oil pump 7, a right-feed travel oil pump 8, a first travel switching valve 101, a second travel switching valve 102, a rotary motor 13, a feed motor 14, a left-feed travel motor 15 and a right-feed travel motor 16, wherein the rotary oil pump 6 is connected to the rotary motor 13 oil circuit, the left-feed travel oil pump 7 is connected to the left-feed travel motor 15 oil circuit via the first travel switching valve 101, and the right-feed travel oil pump 8 is connected to the right-feed travel motor 16 oil circuit via the second travel switching valve 102; further comprising a confluence switching switch 2, a confluence oil pump 9, a confluence switching valve 11 and a controller 12; the confluence switching switch 2 is used to control the valve block action of the confluence switching valve 11, the confluence oil pump 9 and the confluence switching valve 11 The confluence oil pump 9 is connected to the oil circuit, and the confluence switching valve 11 is connected to the oil circuits of the rotary motor 13 and the feed motor 14 respectively. The confluence switching valve 11 is used to control the oil supply direction of the confluence oil pump 9, so that the oil supply of the confluence oil pump 9 can be switched between the rotary motor 13 and the feed motor 14, thereby realizing confluence rotation and confluence feeding;

[0019] The first travel switching valve 101 is also connected to the oil circuit of the feed motor 14. The first travel switching valve 101 controls the oil supply direction of the left travel oil pump 7, so that the oil supply of the left travel oil pump 7 can be switched between the feed motor 14 and the left travel motor 15, thereby realizing the combined feeding and the travel of the left crawler of the drilling rig. The second travel switching valve 102 is also connected to the oil circuit of the feed motor 14. The second travel switching valve 102 is used to control the oil supply direction of the right travel oil pump 8, so that the oil supply of the right travel oil pump 8 can be switched between the feed motor 14 and the right travel motor 16, thereby realizing the combined feeding and the travel of the right crawler of the drilling rig.

[0020] It also includes a travel switching switch 1, a feed handle 3, a slewing handle 4, a left travel handle 51, and a right travel handle 52. The travel switching switch 1 is used to control the first travel switching valve 101 and the second travel switching valve 102; the feed handle 3 is used to control the feed action of the drilling rig power head, the slewing handle 4 is used to control the main shaft rotation of the drilling rig power head, and the left travel handle 51 and the right travel handle 52 respectively control the actions of the left track and the right track of the drilling rig.

[0021] The controller 12 is electrically connected to the travel switch 1, the merging switch 2, the feed handle 3, the slewing handle 4, the left travel handle 51, the right travel handle 52, the slewing oil pump 6, the feed left travel oil pump 7, the feed right travel oil pump 8, the merging oil pump 9, the first travel switching valve 101, the second travel switching valve 102, and the merging switching valve 11 respectively. The controller 12 is located in the electrical control box of the drilling rig and is used for signal acquisition, data analysis and electrical signal output to achieve automatic control.

[0022] The outlet end of the merging switching valve 11 is connected in parallel with the E-port end of the first travel switching valve 101 and the E-port end of the second travel switching valve 102 to achieve merging and ensure that multiple switching controls have no influence on each other.

[0023] The confluence switching valve 11 , the first travel switching valve 101 and the second travel switching valve 102 are all two-position six-way electromagnetic reversing valves.

[0024] The working principle of the present invention is:

[0025] When the travel switch 1 and the merging switch 2 are both closed, the first travel switch valve 101, the second travel switch valve 102 and the merging switch valve 11 are all closed. Figure 1 In the state shown, the oil supply of the confluence oil pump 9 of the hydraulic part is merged into the rotary oil pump 6 through the confluence switching valve 11, realizing the confluence oil supply to the rotary motor 13, and then realizing the main shaft force rotation of the drilling rig power head to adapt to specific working conditions; the feed left travel oil pump 7 and the feed left travel oil pump 8 are merged to realize the confluence oil supply to the feed motor 14, and then realize the feeding action of the drilling rig power head to adapt to specific working conditions. At this time, the rotary handle 4 controls the rotary oil pump 6 and the confluence oil pump 9 through the controller 12 to be responsible for the rotary action. The feed handle 3 controls the feed left travel oil pump 7 and the feed right travel oil pump 8 through the controller 12 to be responsible for the feeding action. The crawler of the drilling rig does not move. This is the rotary confluence mode.

[0026] When the travel switch 1 is closed but the confluence switch 2 is open, the first travel switch valve 101 and the second travel switch valve 102 are closed, and the confluence switch valve 11 is opened; in the hydraulic part, the confluence oil pump 9 is disconnected from the rotary oil pump 6 through the confluence switch valve 11 and then merged with the feed left travel oil pump 7 and the feed left travel oil pump 8, that is, the confluence oil pump 9 supplies oil to the feed motor 14 through the confluence switch valve 11, and the feed left travel oil pump 7 and the feed left travel oil pump 8 simultaneously supply oil to the feed motor 14 to realize confluence feeding; at this time, the rotary handle 4 controls the rotary oil pump 6 through the controller 12 to be responsible for the rotary action, and the feed handle 3 controls the feed left travel oil pump 7 and the feed left travel oil pump 8 and the confluence oil pump 9 through the controller 12 to be responsible for the feeding action. The crawler of the drilling rig does not move. At this time, it is the feeding confluence mode.

[0027] When the travel switch 1 is turned on, regardless of whether the confluence switch 2 is turned on or not, the hydraulic confluence oil pump 9 is forcibly merged into the rotary oil pump 6, that is, the confluence oil pump 9 supplies oil to the rotary motor 13 through the confluence switching valve 11, and the left travel oil pump 7 and the left travel oil pump 8 are separated by the first travel switching valve 101 and the second travel switching valve 102. At this time, the left travel handle 51 and the right travel handle 52 respectively control the left travel oil pump 7 to supply oil to the left travel motor 15 and the left travel oil pump 8 to supply oil to the right travel motor 16, and finally realize the walking of the left crawler and the right crawler of the drilling rig, and the drilling rig moves. The controller 12 shields the feed handle 3 and the rotary handle 4 signals. At this time, it is the drilling rig walking mode.

[0028] In the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it 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. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] The above embodiments are used to further illustrate the present invention, but the present invention is not limited to these specific embodiments. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be understood to be within the protection scope of the present invention.

Claims

1. A pump-valve combined electro-hydraulic switching control system, comprising a rotary oil pump (6), a left-moving feed oil pump (7), a right-moving feed oil pump (8), a first travel switching valve (101), a second travel switching valve (102), a rotary motor (13), a feed motor (14), a left-moving motor (15) and a right-moving motor (16), wherein the rotary oil pump (6) is connected to an oil circuit of the rotary motor (13), the left-moving feed oil pump (7) is connected to an oil circuit of the left-moving feed motor (15) via the first travel switching valve (101), and the right-moving feed oil pump (8) is connected to an oil circuit of the right-moving feed motor (16) via the second travel switching valve (102); Features: It also includes a merging switch (2), a merging oil pump (9), a merging switching valve (11) and a controller (12); the merging oil pump (9) is connected to the oil circuit of the merging switching valve (11), the merging switching valve (11) is respectively connected to the oil circuits of the rotary motor (13) and the feed motor (14), the first travel switching valve (101) is also connected to the oil circuit of the feed motor (14), and the second travel switching valve (102) is also connected to the oil circuit of the feed motor (14); the merging switching valve (11) is used to control the oil supply direction of the merging oil pump (9), so that the oil supply of the merging oil pump (9) can be switched between the rotary motor (13) and the feed motor (14); the first travel switching valve (101) controls the oil supply direction of the feed left travel oil pump (7), so that the oil supply of the feed left travel oil pump (7) can be switched between the feed motor (14) and the left travel motor (15); The second travel switching valve (102) is used to control the oil supply direction of the right travel oil pump (8) so that the oil supply of the right travel oil pump (8) can be switched between the feed motor (14) and the right travel motor (16).

2. A pump-valve combined electro-hydraulic switching control system according to claim 1, Features: It also includes a travel switch (1), a feed handle (3), a rotation handle (4), a left travel handle (51), and a right travel handle (52).

3. A pump-valve combined electro-hydraulic switching control system according to claim 2, Features: The controller (12) is electrically connected to the travel switching switch (1), the merging switching switch (2), the feed handle (3), the swing handle (4), the left travel handle (51), the right travel handle (52), the swing oil pump (6), the feed left travel oil pump (7), the feed right travel oil pump (8), the merging oil pump (9), the first travel switching valve (101), the second travel switching valve (102), and the merging switching valve (11).

4. A pump-valve combined electro-hydraulic switching control system according to claim 3, Features: The merging switching valve (11), the first travel switching valve (101) and the second travel switching valve (102) are all two-position six-way electromagnetic reversing valves; the outlet end of the merging switching valve (11) is connected in parallel with the E port end of the first travel switching valve (101) and the E port end of the second travel switching valve (102) to achieve merging.

5. A combined pump-valve electro-hydraulic switching control system according to claim 1, characterized in that: the confluence switching valve (11), the first travel switching valve (101) and the second travel switching valve (102) are all two-position six-way electromagnetic directional control valves.

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