CN216589342U - Oil circuit control system of punching equipment, hydraulic system and punching equipment - Google Patents

Oil circuit control system of punching equipment, hydraulic system and punching equipment Download PDF

Info

Publication number
CN216589342U
CN216589342U CN202122925847.9U CN202122925847U CN216589342U CN 216589342 U CN216589342 U CN 216589342U CN 202122925847 U CN202122925847 U CN 202122925847U CN 216589342 U CN216589342 U CN 216589342U
Authority
CN
China
Prior art keywords
oil
drilling
control system
assembly
valve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202122925847.9U
Other languages
Chinese (zh)
Inventor
黄志文
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guangdong Diaohuang Intelligent Technology Co ltd
Original Assignee
Guangdong Diaohuang Intelligent Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Guangdong Diaohuang Intelligent Technology Co ltd filed Critical Guangdong Diaohuang Intelligent Technology Co ltd
Priority to CN202122925847.9U priority Critical patent/CN216589342U/en
Application granted granted Critical
Publication of CN216589342U publication Critical patent/CN216589342U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Earth Drilling (AREA)

Abstract

The utility model relates to the technical field of punching equipment, and discloses an oil way control system of punching equipment, which comprises a plurality of adjusting components, a plurality of oil cylinders for driving the adjusting components to move, a plurality of proportional valves for controlling the flow of an oil way, a plurality of reversing valves for changing the direction of the oil way and an intelligent control module, wherein the intelligent control module is electrically connected with a plurality of electromagnetic valves, and the intelligent control module controls the electromagnetic valves to work through preset instructions. And an oil way control system of the punching equipment controls the stretching of the oil cylinder and drives the punching equipment to be adjusted to the position to be punched. The drilling machine has the advantages that the working range of the drilling equipment is enlarged, the drilling machine is suitable for various drilling environments, the driving is stable, the driving speed is high, and the stability and the operation flexibility of the drilling equipment are enhanced.

Description

Oil circuit control system of punching equipment, hydraulic system and punching equipment
Technical Field
The utility model relates to the technical field of punching equipment, in particular to an oil way control system of the punching equipment, a hydraulic system and the punching equipment.
Background
A drilling device in the field of engineering machinery, which is generally a wheel type drilling machine (rock drill) comprises a travelling mechanism, a simple hydraulic angle adjusting mechanism arranged on the travelling mechanism, drilling equipment and a drill boom, and can drill and pile on a hard road surface.
However, the wheel type drilling machine usually adjusts the direction and angle of the drill boom through a control system, when in use, the direction of the drill bit can only be adjusted through the traveling device and the link mechanism, the swing is small, a long time is required for alignment during construction, the direction adjusting capability is poor, a side swing mechanism is not provided, the drilling range is also limited, and the drilling angle has certain limitation, so that the drilling machine cannot be constructed on bad road conditions such as an inclined road surface. In addition, the control system usually completes the positioning of the drill boom through a manual operation valve, a logic valve, a hydraulic valve and the like, but the control method has various pipelines, frequent faults and easy leakage; in addition, a plurality of parts and the punching speed of the punching equipment cannot be intelligently adjusted, so that the working time is too long, and a large amount of time cost and labor cost are wasted.
SUMMERY OF THE UTILITY MODEL
In view of the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is to provide an oil path control system of a rock drilling apparatus, a hydraulic system and a rock drilling apparatus.
In order to achieve the purpose, the utility model provides an oil path control system of a punching device, which comprises a plurality of adjusting assemblies, a plurality of oil cylinders for driving the adjusting assemblies to move, a plurality of electromagnetic valves connected with the oil cylinders, and an intelligent control module, wherein the adjusting assemblies are used for controlling the actions of the punching device, the oil cylinders are used for driving the adjusting assemblies to move, the electromagnetic valves comprise a plurality of proportional valves for controlling the flow of an oil path and a plurality of reversing valves for changing the direction of the oil path, the intelligent control module is electrically connected with the electromagnetic valves, and the intelligent control module controls the electromagnetic valves to work through preset instructions. And an oil way control system of the punching equipment controls the stretching of the oil cylinder and drives the punching equipment to be adjusted to the position to be punched.
Optionally, in an embodiment, the drilling device includes a walking device and a drilling device, and the walking device is hinged with the drilling device through a carriage; the adjustment assembly includes: drilling equipment adjustment subassembly and walking equipment adjustment subassembly, drilling equipment adjustment subassembly includes: the drill boom swinging assembly is used for controlling the drill boom to move; the drilling arm pitching assembly is used for controlling the lifting of the drilling arm; the propelling beam is used for carrying out stroke compensation on the drill boom; a carriage swing assembly for adjusting the position of the drill boom; a carriage pitch assembly for adjusting the drill arm angle.
Optionally, in an embodiment, the walking device adjusting assembly includes a track leveling assembly, the track leveling assembly includes a left leveling cylinder and a right leveling cylinder, and the left leveling cylinder is connected to the right leveling cylinder.
Optionally, the walking device adjusting assembly further comprises a support leg, wherein the support leg extends out during the operation of the drilling device and retracts in the walking process.
Optionally, the combination proportional valve is powered on before the reversing valve is powered off before the proportional valve is powered on.
Optionally, the push beam assembly comprises a two-way hydraulic lock formed by two one-way pilot operated valves.
Optionally, the reversing valve is a three-position four-way solenoid valve.
Optionally, the proportional valve is a constant-pressure-difference pressure-reducing valve.
The utility model also discloses a hydraulic system which comprises the oil way control system of any one of the punching devices.
The utility model also discloses a punching device, which comprises the oil circuit control system of any one of the punching devices.
According to the technical scheme provided by the utility model, the expansion and contraction of each oil cylinder are controlled through a plurality of electromagnetic valves of an oil way control system and an intelligent control system, and the positions of a drill boom and a hole drilling are automatically adjusted; for the control system of current equipment of making a hole, the linkage is more direct, and the adjustment boom is more nimble to the hole site of making a hole, need not artifical manual demand that just can satisfy the diversified drilling of drill carriage, saves a large amount of human costs when being favorable to promoting drilling efficiency.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the application, are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. It is obvious that the drawings in the following description are only some embodiments of the application, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:
fig. 1 is a schematic structural diagram of an oil passage control system of a drilling apparatus according to an embodiment of the present application.
100, an oil way control system of a drilling device; 110. an adjustment assembly; 111. a boom swing assembly; 112. a feed beam; 113. a carriage swing assembly; 114. a carriage pitch assembly; 115. a boom pitch assembly; 116. a track leveling assembly; 117. a leg assembly; 120. an oil cylinder; 121. a left leveling cylinder; 122. a right leveling cylinder; 123. a drill boom swing cylinder; 124. a drill boom pitch cylinder; 125. a push beam cylinder; 126. a carriage swing cylinder; 127. a carriage pitch cylinder; 128. a support oil cylinder; 130. a proportional valve; 140. a diverter valve; 150. and (4) hydraulic locking.
Detailed Description
In order to facilitate an understanding of the utility model, the utility model is described in more detail below with reference to the accompanying drawings and specific examples. It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may be present. As used herein, the terms "vertical," "horizontal," "left," "right," "inner," "outer," and the like are used for descriptive purposes only. In the description of the present invention, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating relative importance or as implying any number of technical features indicated. Thus, unless otherwise specified, a feature defined as "first", "second", may explicitly or implicitly include one or more of that feature; "plurality" means two or more. The terms "comprises" and any variations thereof, are intended to cover a non-exclusive inclusion, which may exist or add one or more other features, integers, steps, operations, elements, components, and/or combinations thereof.
Furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be construed broadly, as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or through both elements. All technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Furthermore, the technical features mentioned in the different embodiments of the utility model described below can be combined with each other as long as they do not conflict with each other.
Referring to fig. 1, the present application provides an oil path control system 100 for a drilling apparatus, where the drilling apparatus includes a traveling apparatus and a drilling apparatus; the walking device is hinged with the drilling device through a sliding frame; the oil path control system comprises a plurality of adjusting assemblies 110, an oil cylinder 120 for driving each adjusting assembly 110 to move, a plurality of proportional valves 130 for controlling the flow of oil paths, a plurality of reversing valves 140 for changing the direction of the oil paths and a plurality of hydraulic control valves; the oil circuit control system controls the oil cylinder 120 to extend and retract, and drives the drilling equipment to adjust to an accurate position to be drilled. Wherein, drilling equipment adjustment assembly includes: a boom swing assembly 111 for controlling boom movement; a boom pitch assembly 115 for controlling the boom to rise and fall; a feed beam 112 for stroke compensation of the drill boom; a carriage swing assembly 113 for adjusting the boom position; a carriage pitch assembly 114 for adjusting the boom angle. The walking device adjustment assembly includes a track leveling assembly 116 and a leg assembly 117 that extends during operation of the rock drilling device and retracts during walking of the rock drilling device.
The oil path control system 100 of the drilling equipment in the embodiment of the application further includes an intelligent control module, which is electrically connected to the reversing valve 140, the hydraulic control valve and the proportional valve 130, and controls each electromagnetic valve to work through a preset instruction; the monitoring module of the intelligent control module is used for monitoring the load and the drilling environment of the drilling equipment and adjusting the torque, the rotating speed and the direction of the drilling equipment according to different conditions according to signals of the monitoring module; and when dangerous condition appears, each solenoid valve of the punching equipment is automatically suspended to work, so that the punching equipment is automatically stopped, and the operation safety is provided while the punching equipment is prevented from being damaged.
The oil cylinders 120 of each adjusting assembly 110 are connected in series, and each adjusting assembly comprises a plurality of reversing valves 140, including a first reversing valve 1-1, a second reversing valve 1-2, a third reversing valve 1-3, a fourth reversing valve 1-4, a fifth reversing valve 1-5, a sixth reversing valve 1-6 and a seventh reversing valve 1-7, and forms an oil supply pipeline with an oil inlet P4 and an oil outlet pipeline with an oil outlet T4, so that a plurality of oil paths are formed;
when the power is on, the reversing valve 140 is firstly powered on, the first oil path passes through the first reversing valve 1-1, the port D101 on the left side of the first reversing valve 1-1 is powered on, oil enters the first proportional valve 130 through the port A1, the oil inlet flow is kept unchanged by V1 and C1, the drill boom swing oil cylinder 123 is driven to retract in the stroke according to the flow set by the proportional valve 130, and the drill boom swings in a translation mode. When the left side D101 of the first reversing valve 1-1 is not electrified and the first reversing valve D102 is electrified, oil enters the first proportional valve 130 through the port B1, flows through the V2-C2 and controls the drill boom swing oil cylinder 123 to extend out in the process by setting the oil quantity through the proportional valve 130, and drives the drill boom to swing in a translation mode.
The second oil path passes through a second reversing valve 1-2, and enters a hydraulic control valve of the propulsion beam 112 assembly through an A2 port when the left side D103 is electrified; oil flows from the V1 to the C1 through a one-way hydraulic control valve to drive the oil cylinder 120 of the push beam 112, and the oil is discharged through the C2 and the V2; on the contrary, when the right side D104 is electrified, oil flows from the V2 to the C2 through a port B2 through a one-way hydraulic control valve to drive the oil cylinder 120 of the push beam 112, and oil is discharged through the C1 and the V1; the expansion and contraction of the oil cylinder 120 of the push beam 112 depends on the oil amount between the oil outlet and the oil inlet; when the oil outlet is larger than the oil inlet, the push beam 112 reversely extends or retracts the oil cylinder 120. The two one-way hydraulic control valves form a two-way hydraulic lock 150, and when the two sides D103 and D104 are not electrified, namely oil supply is stopped, the working state of the oil cylinder 120 of the push beam 112 is unchanged.
When holes need to be drilled on a certain inclined plane or near the edge, the push beam 112 needs to be compensated to a certain inclined position and angle, and the drill boom moves along with the main boom pitching assembly 115 when the drill boom is driven to ascend or descend, so that the positioning speed of the drill boom is increased, and the working range is widened. The hydraulic lock 150 can be arranged to better realize the safe locking of the oil cylinder 120 of the push beam 112 and the pressure overflow safety protection along with the swing limit of the main arm.
The third oil path passes through a third reversing valve 1-3, a port D105 on the left side of the third reversing valve 1-3 is electrified, oil enters a second proportional valve 130 through a port A3, the oil inlet flow is kept unchanged by C1 and V1, and a sliding frame swing oil cylinder 126120 is driven to retract according to the flow set by the proportional valve 130 to drive the sliding frame to swing. When the left side D105 of the third reversing valve 1-3 is not electrified and the third reversing valve D106 is electrified, oil enters the second proportional valve 130 through the port B1, flows through the port V2 to the port C2 and controls the drill boom swing oil cylinder 123 to extend according to the oil quantity set by the proportional valve 130, and drives the sliding frame to swing in a translation mode.
The fourth oil path drives the oil cylinder 127 of the carriage pitch component 114 to extend and retract through a fourth reversing valve 1-4 and a third proportional valve 130, and the fifth oil path drives the oil cylinder 127 of the boom pitch component 115 to extend and retract through a fifth reversing valve 1-5 and a fourth proportional valve 130; the sixth oil path drives the oil cylinder 120 of the track leveling component 116 of the walking equipment to stretch and retract through a sixth reversing valve 1-6 and a fifth proportional valve 130; the seventh oil path extends and retracts through the seventh reversing valve 1-7 and the oil cylinder 128 of the supporting leg assembly 117 of the sixth proportional valve 130; the principle is the same as that of the first and third oil paths, and is not described herein.
Specifically, the plurality of reversing valves are three-position four-way solenoid valves, the first reversing valve, the third reversing valve and the fifth reversing valve are normally-off three-position four-way solenoid valves, and the second reversing valve and the fourth reversing valve are normally-on three-position four-way solenoid valves.
According to the oil path control system 100 of the punching equipment, whether each corresponding adjusting assembly 110 needs to operate or not is controlled through the three-position four-way electromagnetic valve which is electrified first, then the electricity of the combined proportional valve 130 is switched on, hydraulic oil with adjustable proportion is output, namely adjustable hydraulic pressure is output, so that the movement of each corresponding adjusting assembly 110 is driven, and the stroke and speed of the movement of the adjusting assembly 110 are controlled; like this can be better adaptation in the drilling equipment to different hydraulic pressure force's demand at the drilling in-process, can adjust different output pressure in real time according to the demand at the drilling in-process, make the drilling process of drilling rig 200 more smooth and easy, the efficiency of drilling is higher, and the hole of chisel out is more beautiful, accords with the requirement more.
Further, the track leveling assembly 116 includes a left leveling cylinder 121 and a right leveling cylinder 122, and the left leveling cylinder 121 is connected to the right leveling cylinder 122.
When the chassis of the rock drilling equipment meets the conditions of uneven or pothole and inclined road surfaces, the walking equipment can automatically keep balance through the track leveling component 116, through on-off control of the sixth reversing valve and the fifth proportional valve 130, when the walking road surfaces are uneven, one oil cylinder 121 is compressed, oil liquid flows to the other oil cylinder 122 through the fifth proportional valve 130 and the one-way valve, and the other oil cylinder 122 correspondingly extends out, so that a floating vehicle body is balanced. Of course, the left leveling cylinder 121 and the right leveling cylinder 122 can also be independently extended and retracted to keep the balance of the rock drilling equipment. If the D11 on the left side of the sixth reversing valve 1-6 is electrified, oil enters the fifth proportional valve 130 through the A6 port, the V1 is communicated with the C1, the oil quantity set by the proportional valve 130 is given, and the left leveling oil cylinder 121 contracts; the oil is communicated to the right leveling cylinder 122, and the right leveling cylinder 122 correspondingly extends out.
The walking device adjusting assembly 110 further comprises a leg assembly 117 for controlling the extension and retraction of the legs, wherein the leg assembly 117 is positioned at two sides of the walking device and extends out when the punching device works and retracts back in the walking process.
More specifically, the proportional valve 130 of the oil path control system 100 of the drilling equipment of the present application is a constant-pressure-difference pressure-reducing valve, which stabilizes the pressure difference between the left end and the right end in the oil cylinder 120, and ensures that the flow rate passing through the proportional valve 130 is kept unchanged, thereby ensuring that the process of the driving adjustment assembly 110 meets the range of adjustment requirements, and enabling the drill boom to accurately and quickly reach the position to be drilled.
In an embodiment, the punching apparatus further includes an intelligent control system including a data monitoring and processing device, and the oil path control system 100 of the punching apparatus further includes a monitoring oil path for monitoring data of hydraulic oil in each hydraulic component; and the monitoring oil circuit is internally provided with a monitoring unit, such as a pressure monitoring unit, a flow monitoring unit, a temperature monitoring unit and the like, and the monitoring unit is electrically connected with the data monitoring and processing device.
The working condition in the hydraulic system is monitored through the monitoring oil way, various data of the work are transmitted to the data monitoring and processing device to be recorded and displayed, if the data are abnormal, the abnormal data are processed in time, the operation of the drilling machine under a normal state is guaranteed, the drilling machine is prevented from being broken down or accidents are prevented, and therefore the smooth drilling is guaranteed.
The embodiment of the application also discloses a hydraulic system, which comprises the oil path control system 100 of any one of the drilling devices.
The embodiment of the application also discloses a punching device, which comprises the oil path control system 100 of any one of the punching devices.
The oil circuit control system 100 of the punching equipment can meet the drilling angle and the requirement of various punching equipment by driving each adjusting assembly 110 through a plurality of oil circuits, simplifies a hydraulic system, reduces hydraulic oil leakage, and improves the reliability and the stability of the oil circuit control system. The hydraulic control system is also suitable for various equipment needing to be controlled, driven and adjusted to work in a hydraulic mode, such as cranes, forklifts, excavators and the like.
The above examples are only intended to illustrate the technical solution of the present invention, and not to limit it; within the idea of the utility model, also technical features in the above embodiments or in different embodiments may be combined, steps may be implemented in any order, and there are many other variations of the different aspects of the utility model as described above, which are not provided in detail for the sake of brevity; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (10)

1. An oil path control system of a drilling apparatus, comprising:
a plurality of adjustment assemblies for controlling the action of the rock drilling apparatus;
the oil cylinders are used for driving the adjusting components to move;
a plurality of solenoid valves connected to the oil cylinder, the solenoid valves include:
the proportional valve is used for controlling the flow of the oil way;
the reversing valve is used for changing the direction of an oil path;
the intelligent control module is electrically connected with the plurality of electromagnetic valves;
the intelligent control module controls the electromagnetic valves to work through a preset instruction; the oil circuit control system controls the oil cylinder to stretch and retract, and drives the hole drilling equipment to the position to be drilled.
2. The oil circuit control system of a drilling device as claimed in claim 1, wherein the drilling device comprises a walking device and a drilling device, the walking device is hinged with a drilling arm of the drilling device through a carriage; the adjustment subassembly includes drilling equipment adjustment subassembly and walking equipment adjustment subassembly, drilling equipment adjustment subassembly includes:
the drill boom swinging assembly is used for controlling the drill boom to move;
the drilling arm pitching assembly is used for controlling the drilling arm to lift;
the propelling beam is used for carrying out stroke compensation on the drill boom;
a carriage swing assembly for adjusting the position of the drill boom;
a carriage pitch assembly for adjusting the drill arm angle.
3. The oil circuit control system of a drilling device as recited in claim 2, wherein the walking device adjustment assembly comprises a track leveling assembly, the track leveling assembly comprises a left leveling cylinder and a right leveling cylinder, and the left leveling cylinder is connected to the right leveling cylinder.
4. The oil control system of a rock drilling apparatus of claim 2, wherein the walking apparatus adjustment assembly includes a leg assembly that extends during operation of the rock drilling apparatus and retracts during walking.
5. The oil circuit control system of a drilling device as claimed in claim 2, wherein the reversing valve is powered on before the proportional valve, and the proportional valve is powered off before the reversing valve.
6. An oil control system of a rock drilling apparatus as claimed in claim 2, wherein the push beam assembly includes a two-way hydraulic lock formed by two one-way hydraulic control valves.
7. The oil path control system of a rock drilling apparatus as claimed in claim 1, wherein the change valve is a three-position four-way solenoid valve.
8. The oil control system of a rock drilling apparatus as claimed in claim 1, wherein the proportional valve is a constant-pressure-difference pressure-reducing valve.
9. A hydraulic system, characterized in that it comprises an oil control system of a drilling apparatus according to any one of claims 1-8.
10. A rock drilling apparatus comprising an oil control system of any one of claims 1 to 8.
CN202122925847.9U 2021-11-24 2021-11-24 Oil circuit control system of punching equipment, hydraulic system and punching equipment Active CN216589342U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202122925847.9U CN216589342U (en) 2021-11-24 2021-11-24 Oil circuit control system of punching equipment, hydraulic system and punching equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202122925847.9U CN216589342U (en) 2021-11-24 2021-11-24 Oil circuit control system of punching equipment, hydraulic system and punching equipment

Publications (1)

Publication Number Publication Date
CN216589342U true CN216589342U (en) 2022-05-24

Family

ID=81650018

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202122925847.9U Active CN216589342U (en) 2021-11-24 2021-11-24 Oil circuit control system of punching equipment, hydraulic system and punching equipment

Country Status (1)

Country Link
CN (1) CN216589342U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116906386A (en) * 2023-09-12 2023-10-20 临工重机股份有限公司 Engineering machinery control system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116906386A (en) * 2023-09-12 2023-10-20 临工重机股份有限公司 Engineering machinery control system

Similar Documents

Publication Publication Date Title
US10604915B2 (en) Hydraulic system and hydraulic control method for construction machine
CN216589342U (en) Oil circuit control system of punching equipment, hydraulic system and punching equipment
CN113882459B (en) Excavator energy recovery system and excavator
CN108223467B (en) Hydraulic system for full-hydraulic crawler-type reverse circulation engineering driller
CN107500142B (en) Beam lifting machine
CN104074816B (en) A kind of milling machine Control system of gate and milling machine
CN109235534A (en) A kind of hydraulic crawler excavator multipath hydraulic system
JP2009155893A (en) Dozer device of shovel
CN201932890U (en) Leveling and controlling device for operation bucket
CN105805067A (en) Device for applying force to multiple points of steel supporting shaft synchronously
CN211472677U (en) Telescopic chassis and excavator
CA2826271A1 (en) Lift system with follower system
CN111237294A (en) Hydraulic system of walking pile driver
JP2008019910A (en) Hydraulic control system of working machine
CN104929997B (en) Engineering machinery hydraulic circuit
CN211082435U (en) Electro-hydraulic control valve
CN104033107A (en) Drilling equipment and drill arm
CN210599687U (en) Digital control hydraulic working system of loader
CN209309030U (en) A kind of Multifunction shuttle conveyer energy-saving hydraulic control system
CN110886737A (en) Electro-hydraulic control valve
CN104891341B (en) A kind of follow-up hydraulic mast control system
CN211648625U (en) Manual electronic control multi-way valve assembly, hydraulic system and tire type track-laying crane
CN211143153U (en) Engineering vehicle movable arm vibration reduction system
KR101551059B1 (en) Electric hydraulic actuator controling system for excavator
CN209276041U (en) A kind of novel and multifunctional crane

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant