CN107386996A - A kind of horizontal directional drilling machine vice sequential-controlled hydraulic system - Google Patents

A kind of horizontal directional drilling machine vice sequential-controlled hydraulic system Download PDF

Info

Publication number
CN107386996A
CN107386996A CN201710825237.7A CN201710825237A CN107386996A CN 107386996 A CN107386996 A CN 107386996A CN 201710825237 A CN201710825237 A CN 201710825237A CN 107386996 A CN107386996 A CN 107386996A
Authority
CN
China
Prior art keywords
vice
oil
mouths
cylinder
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.)
Granted
Application number
CN201710825237.7A
Other languages
Chinese (zh)
Other versions
CN107386996B (en
Inventor
王鹏
张忠海
陈以田
张继光
刘娜
吕伟祥
韩立华
张永华
李明
甘立
秦长剑
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.)
Xuzhou XCMG Foundation Construction Machinery Co Ltd
Original Assignee
Xuzhou XCMG Foundation Construction Machinery 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 Xuzhou XCMG Foundation Construction Machinery Co Ltd filed Critical Xuzhou XCMG Foundation Construction Machinery Co Ltd
Priority to CN201710825237.7A priority Critical patent/CN107386996B/en
Publication of CN107386996A publication Critical patent/CN107386996A/en
Application granted granted Critical
Publication of CN107386996B publication Critical patent/CN107386996B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B19/00Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
    • E21B19/16Connecting or disconnecting pipe couplings or joints
    • E21B19/165Control or monitoring arrangements therefor
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/16Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
    • F15B11/17Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors using two or more pumps
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • General Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)

Abstract

The invention discloses a kind of horizontal directional drilling machine vice sequential-controlled hydraulic system, main pump passes through flexible pipe and overflow valve pipeline connection, simultaneously with solenoid valve block P1 mouth pipeline connections, solenoid valve block exports A1, B1 by flexible pipe respectively with preceding vice clamping cylinder A, B mouths connect, solenoid valve block oil-out A2 is connected with rear vice clamping cylinder B mouths and vice rotary oil cylinder A mouths respectively by flexible pipe, sequence valve oil inlet C by pipeline respectively with solenoid valve block oil-out B2, vice clamping cylinder A mouth pipeline connections afterwards, sequence valve oil-out D is connected by pipeline with vice rotary oil cylinder oil inlet B, the next automatic swivel shackle of vice rotary oil cylinder of vice folder after realization, vice rotary oil cylinder automatically resets simultaneously for vice release action afterwards, simplify manual steps, improve efficiency of construction.

Description

A kind of horizontal directional drilling machine vice sequential-controlled hydraulic system
Technical field
The present invention relates to a kind of horizontal directional drill machine hydraulic system, and in particular to a kind of horizontal directional drilling machine vice order is controlled Hydraulic system processed, belong to Directional drilling techniques field.
Background technology
In horizontal directional drilling machine work progress, moved along a straight line by hydraulic pump drive hydraulic jack, drive vice clamping with Vice switching mechanism realizes that preceding vice clamping and release, rear vice clamping and release, rear vice spinning reduction act, and each action control is equal It is controlled by individually switch, operating staff need to constantly operate three switches to complete to add or take out when changing drilling rod every time Drilling rod acts.
In the prior art, preceding vice clamping and release, rear vice clamping and release, rear vice spinning reduction are opened by one respectively One magnetic valve of control is closed to realize corresponding actions, operation is cumbersome, have impact on efficiency of construction.
The content of the invention
Purpose:In order to overcome the deficiencies in the prior art, the present invention provides a kind of horizontal directional drilling machine vice order Hydraulic system is controlled, is solved because preceding vice clamping and release, rear vice clamping and release, rear vice spinning reduction are respectively by a switch One magnetic valve of control come realize corresponding actions cause to operate it is loaded down with trivial details, it is simple in construction the problem of low construction efficiency, reduce assembling Difficulty.
Technical scheme:In order to solve the above technical problems, the technical solution adopted by the present invention is:
A kind of horizontal directional drilling machine vice sequential-controlled hydraulic system, it is characterised in that:Including main pump, overflow valve, solenoid valve block, Sequence valve, preceding vice clamping cylinder, rear vice clamping cylinder, vice rotary oil cylinder, main pump and overflow valve pipeline connection, while with Solenoid valve block P1 mouth pipeline connections, solenoid valve block outlet A1, B1 connect with preceding vice clamping cylinder A, B mouth respectively, solenoid valve block Oil-out A2 connects with rear vice clamping cylinder B mouths and vice rotary oil cylinder A mouths respectively, and sequence valve oil inlet C passes through pipeline point Do not revolved with solenoid valve block oil-out B2, rear vice clamping cylinder A mouth pipeline connections, sequence valve oil-out D by pipeline and vice Turn oil cylinder oil inlet mouth B connections.
Preferably, described horizontal directional drilling machine vice sequential-controlled hydraulic system, it is characterised in that:Described Sequence valve is adjustable sequence valve, and its setup pressure value can step-less adjustment.
Preferably, described horizontal directional drilling machine vice sequential-controlled hydraulic system, it is characterised in that:Described Check valve built in sequence valve, for realizing the normal oil return of vice rotary oil cylinder, without independent external hose.
Described horizontal directional drilling machine vice sequential-controlled hydraulic system, it is characterised in that:The main pump by flexible pipe with Overflow valve pipeline connection.
Described horizontal directional drilling machine vice sequential-controlled hydraulic system, it is characterised in that:The solenoid valve block outlet A1, B1 is connected with preceding vice clamping cylinder A, B mouth respectively by flexible pipe.
Described horizontal directional drilling machine vice sequential-controlled hydraulic system, it is characterised in that:The solenoid valve block oil-out A2 is connected with rear vice clamping cylinder B mouths and vice rotary oil cylinder A mouths respectively by flexible pipe.
Described horizontal directional drilling machine vice sequential-controlled hydraulic system, it is characterised in that:Vice clamps dynamic after operation When making, rear vice clamping cylinder control magnetic valve Y14 obtains electric, pump discharge B oil circuits vice clamping after the entrance of solenoid valve block B2 mouths Oil cylinder A mouths and sequence valve oil-feed C mouths, after clamping drilling rod pressure reaches sequence valve setup pressure value, sequence valve is opened, C oral fluids The existing automatic turning shackle of force feed vice rotary oil cylinder B causes for gossip after sequence valve enters.
After operation after vice release action, rear vice clamping cylinder control magnetic valve Y13 obtains electric, pump discharge B oil circuits warp Solenoid valve block A2 mouths enter rear vice clamping cylinder A mouths and rear vice rotary oil cylinder B causes for gossip now reset simultaneously, while rear vice rotation Turn oil cylinder B mouth oil circuit and realize oil return through built-in check valve in sequence valve.
Beneficial effect:Horizontal directional drilling machine vice sequential-controlled hydraulic system provided by the invention, by solenoid valve block Add sequence valve between rear vice rotary oil cylinder pipeline, on the one hand when after vice clamping cylinder control magnetic valve Y14 obtain it is electric Afterwards, pump discharge B oil circuits vice clamping cylinder A mouths and sequence valve oil-feed C mouths after the entrance of solenoid valve block B2 mouths, when clamping drilling rod pressure After power reaches sequence valve setup pressure value, sequence valve is opened, the vice rotary oil cylinder B causes for gossip after sequence valve enters of C oral fluids force feed Existing automatic turning shackle, on the other hand when after vice clamping cylinder control magnetic valve Y13 obtain it is electric after, pump discharge B oil circuits are through electromagnetism Valve group A2 mouths enter rear vice clamping cylinder A mouths and rear vice rotary oil cylinder B causes for gossip now reset simultaneously, while rear vice rotation oil Cylinder B mouths oil circuit realizes oil return through built-in check valve in sequence valve.Due to this set hydraulic system than normal fluid pressure system processing when One group of sequence valve of more assemblings is only needed, while solenoid valve block is reduced to two by three, corresponding controlling switch is reduced to two by three It is individual, the difficulty of assembling is greatly reduced, system architecture is simple, process and assemble is convenient, reliable and practical.
Brief description of the drawings
Fig. 1 is the hydraulic schematic diagram of the present invention.
In figure:1st, main pump, 2, overflow valve, 3, solenoid valve block, 4, sequence valve, 5, preceding vice clamping cylinder I, 6, preceding vice folder Locking oil cylinder II, 7, rear vice clamping cylinder I, 8, rear vice clamping cylinder II, 9, rear vice rotary oil cylinder.
Embodiment
The present invention is further described with reference to specific embodiment.
As shown in figure 1, a kind of horizontal directional drilling machine vice sequential-controlled hydraulic system, including main pump 1, main pump 1 is by soft Pipe and the pipeline connection of overflow valve 2, while export A1, B1 with the P1 mouth pipeline connections of solenoid valve block 3, solenoid valve block 3 and pass through flexible pipe point Do not connected with preceding vice clamping cylinder I 5, preceding vice clamping cylinder II 6 A, B mouth, the oil-out A2 of solenoid valve block 3 passes through flexible pipe point Do not connected with rear vice clamping cylinder I 7, the B mouths of rear vice clamping cylinder II 8 and the A mouths of vice rotary oil cylinder 9, in addition to order Valve 4, the oil inlet C of sequence valve 4 are clamped with the oil-out B2 of solenoid valve block 3, rear vice clamping cylinder I 7, rear vice respectively by pipeline The A mouth pipeline connections of oil cylinder II 8, the oil-out D of sequence valve 4 are connected by pipeline with the oil inlet B of vice rotary oil cylinder 9.
Further, check valve built in sequence valve 4, the normal oil return of the B mouths of vice rotary oil cylinder 9 can be achieved, without individually outer Connect flexible pipe.
The course of work of the present invention is as follows:The oil-out of main pump 1 is connected by flexible pipe with the oil inlet of overflow valve 2 first, together When with the P1 mouth pipeline connections of solenoid valve block 3, then by solenoid valve block 3 export A1, B1 by flexible pipe respectively with preceding vice clamp oil Cylinder I 5, preceding vice clamping cylinder II 6 A, B mouth connection, while the oil-out A2 of solenoid valve block 3 by flexible pipe respectively with rear vice folder Locking oil cylinder I 7, the B mouths of rear vice clamping cylinder II 8 and the connection of the A mouths of vice rotary oil cylinder 9, again lead to the oil inlet C of sequence valve 4 Cross pipeline respectively with the oil-out B2 of solenoid valve block 3, rear vice clamping cylinder I 7, the A mouth pipeline connections of rear vice clamping cylinder II 8, The oil-out D of sequence valve 4 is connected by pipeline with the oil inlet B of vice rotary oil cylinder 9 simultaneously.When vice pinching action after operation, Vice clamping cylinder control magnetic valve Y14 is obtained electric afterwards, pump discharge B oil circuits vice clamping cylinder A after the entrance of solenoid valve block B2 mouths Mouth and sequence valve oil-feed C mouths, after clamping drilling rod pressure reaches sequence valve setup pressure value, sequence valve is opened, C oral fluids force feed warp Sequence valve enters the existing automatic turning shackle of rear vice rotary oil cylinder B causes for gossip, and after operation after vice release action, rear vice clamps Oil cylinder control magnetic valve Y13 obtain it is electric, pump discharge B oil circuits through solenoid valve block A2 mouths entrance after vice clamping cylinder A mouths and after vice Rotary oil cylinder B causes for gossip are now resetted simultaneously, while rear vice rotary oil cylinder B mouths oil circuit is realized back through built-in check valve in sequence valve Oil.Whole process need to only operate preceding vice clamping and rear vice pinching action, vice rotary oil cylinder auto-action, solve Vice operating process is cumbersome, the problem of low construction efficiency.
Described above is only the preferred embodiment of the present invention, it should be pointed out that:For the ordinary skill people of the art For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should It is considered as protection scope of the present invention.

Claims (8)

  1. A kind of 1. horizontal directional drilling machine vice sequential-controlled hydraulic system, it is characterised in that:Including main pump(1), overflow valve(2)、 Solenoid valve block(3), sequence valve(4), preceding vice clamping cylinder(5、6), rear vice clamping cylinder(7、8), vice rotary oil cylinder (9), main pump(1)With overflow valve(2)Pipeline connection, while and solenoid valve block(3)P1 mouth pipeline connections, solenoid valve block(3)Outlet A1, B1 respectively with preceding vice clamping cylinder(5、6)A, B mouths connect, solenoid valve block(3)Oil-out A2 clamps oil with rear vice respectively Cylinder(7、8)B mouths and vice rotary oil cylinder(9)A mouths connect, sequence valve(4)Oil inlet C by pipeline respectively with solenoid valve block(3) Oil-out B2, rear vice clamping cylinder(7、8)A mouth pipeline connections, sequence valve(4)Oil-out D rotates oil by pipeline and vice Cylinder(9)Oil inlet B is connected.
  2. 2. horizontal directional drilling machine vice sequential-controlled hydraulic system according to claim 1, it is characterised in that:Described is suitable Sequence valve(4)For adjustable sequence valve, its setup pressure value can step-less adjustment.
  3. 3. horizontal directional drilling machine vice sequential-controlled hydraulic system according to claim 1, it is characterised in that:Described is suitable Sequence valve(4)Built-in check valve, for realizing the normal oil return of vice rotary oil cylinder.
  4. 4. horizontal directional drilling machine vice sequential-controlled hydraulic system according to claim 1, it is characterised in that:The main pump (1)Pass through flexible pipe and overflow valve(2)Pipeline connection.
  5. 5. horizontal directional drilling machine vice sequential-controlled hydraulic system according to claim 1, it is characterised in that:The electromagnetism Valve group(3)Export A1, B1 by flexible pipe respectively with preceding vice clamping cylinder(5、6)A, B mouths connect.
  6. 6. horizontal directional drilling machine vice sequential-controlled hydraulic system according to claim 1, it is characterised in that:The electromagnetism Valve group(3)Oil-out A2 by flexible pipe respectively with rear vice clamping cylinder(7、8)B mouths and vice rotary oil cylinder(9)A mouths connect.
  7. 7. horizontal directional drilling machine vice sequential-controlled hydraulic system according to claim 1, it is characterised in that:After operation During vice pinching action, it is electric that rear vice clamping cylinder controls magnetic valve Y14 to obtain, and pump discharge B oil circuits enter through solenoid valve block B2 mouths Vice clamping cylinder A mouths and sequence valve oil-feed C mouths afterwards, after clamping drilling rod pressure reaches sequence valve setup pressure value, sequence valve Open, the existing automatic turning shackle of C oral fluids force feed vice rotary oil cylinder B causes for gossip after sequence valve enters.
  8. 8. horizontal directional drilling machine vice sequential-controlled hydraulic system according to claim 1, it is characterised in that:After operation After vice release action, it is electric that rear vice clamping cylinder controls magnetic valve Y13 to obtain, and pump discharge B oil circuits enter through solenoid valve block A2 mouths Vice clamping cylinder A mouths and rear vice rotary oil cylinder B causes for gossip now reset simultaneously afterwards, while rear vice rotary oil cylinder B mouths oil circuit warp Built-in check valve realizes oil return in sequence valve.
CN201710825237.7A 2017-09-14 2017-09-14 Sequential control hydraulic system of horizontal directional drilling machine vice Active CN107386996B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710825237.7A CN107386996B (en) 2017-09-14 2017-09-14 Sequential control hydraulic system of horizontal directional drilling machine vice

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710825237.7A CN107386996B (en) 2017-09-14 2017-09-14 Sequential control hydraulic system of horizontal directional drilling machine vice

Publications (2)

Publication Number Publication Date
CN107386996A true CN107386996A (en) 2017-11-24
CN107386996B CN107386996B (en) 2023-08-29

Family

ID=60349770

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201710825237.7A Active CN107386996B (en) 2017-09-14 2017-09-14 Sequential control hydraulic system of horizontal directional drilling machine vice

Country Status (1)

Country Link
CN (1) CN107386996B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113187416A (en) * 2021-05-14 2021-07-30 徐州徐工基础工程机械有限公司 Auxiliary shackle device and method for power head of horizontal directional drilling machine
CN113719248A (en) * 2021-06-24 2021-11-30 江苏徐工工程机械研究院有限公司 Clamp synchronous control system, clamp device and drilling machine
CN114151028A (en) * 2021-11-08 2022-03-08 上海中联重科桩工机械有限公司 Sleeve clamping device and full-sleeve full-slewing drilling machine
CN114151397A (en) * 2021-11-08 2022-03-08 上海中联重科桩工机械有限公司 Sleeve clamping device and full-sleeve full-slewing drilling machine

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201705206U (en) * 2010-06-24 2011-01-12 湖南一品重机股份有限公司 Drilling machine clamp holder
CN202627997U (en) * 2012-06-27 2012-12-26 山东山推机械有限公司 Clamping and unscrewing system for horizontal directional drilling machine
CN202627992U (en) * 2012-06-27 2012-12-26 山东山推机械有限公司 Drilling rod lifting and descending system of horizontal directional drilling rig
CN202832301U (en) * 2012-09-12 2013-03-27 东莞市神龙机械科技有限公司 Drilling machine hydraulic system
CN104675343A (en) * 2015-01-30 2015-06-03 徐州徐工基础工程机械有限公司 Safety control device for regulating pressures of jaw vices of horizontal directional drilling machine
CN207194849U (en) * 2017-09-14 2018-04-06 徐州徐工基础工程机械有限公司 A kind of horizontal directional drilling machine vice sequential-controlled hydraulic system

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201705206U (en) * 2010-06-24 2011-01-12 湖南一品重机股份有限公司 Drilling machine clamp holder
CN202627997U (en) * 2012-06-27 2012-12-26 山东山推机械有限公司 Clamping and unscrewing system for horizontal directional drilling machine
CN202627992U (en) * 2012-06-27 2012-12-26 山东山推机械有限公司 Drilling rod lifting and descending system of horizontal directional drilling rig
CN202832301U (en) * 2012-09-12 2013-03-27 东莞市神龙机械科技有限公司 Drilling machine hydraulic system
CN104675343A (en) * 2015-01-30 2015-06-03 徐州徐工基础工程机械有限公司 Safety control device for regulating pressures of jaw vices of horizontal directional drilling machine
CN207194849U (en) * 2017-09-14 2018-04-06 徐州徐工基础工程机械有限公司 A kind of horizontal directional drilling machine vice sequential-controlled hydraulic system

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113187416A (en) * 2021-05-14 2021-07-30 徐州徐工基础工程机械有限公司 Auxiliary shackle device and method for power head of horizontal directional drilling machine
CN113719248A (en) * 2021-06-24 2021-11-30 江苏徐工工程机械研究院有限公司 Clamp synchronous control system, clamp device and drilling machine
CN113719248B (en) * 2021-06-24 2024-04-30 江苏徐工工程机械研究院有限公司 Clamp synchronous control system, clamp device and drilling machine
CN114151028A (en) * 2021-11-08 2022-03-08 上海中联重科桩工机械有限公司 Sleeve clamping device and full-sleeve full-slewing drilling machine
CN114151397A (en) * 2021-11-08 2022-03-08 上海中联重科桩工机械有限公司 Sleeve clamping device and full-sleeve full-slewing drilling machine
CN114151397B (en) * 2021-11-08 2024-04-09 上海中联重科桩工机械有限公司 Casing clamping device and full casing full-circle drilling machine

Also Published As

Publication number Publication date
CN107386996B (en) 2023-08-29

Similar Documents

Publication Publication Date Title
CN107386996A (en) A kind of horizontal directional drilling machine vice sequential-controlled hydraulic system
CN102491174B (en) Crane, method for controlling tension of steel wire rope and hydraulic system
CN206158631U (en) Utilize accuse to press automatic distribution manifold's of well drilling accuse and press drilling system
WO2015055042A1 (en) Rotatory energy recycling control device for hydraulic excavator
CN207194849U (en) A kind of horizontal directional drilling machine vice sequential-controlled hydraulic system
CN107013709A (en) A kind of four-way reversing valve
CN103628519A (en) Excavator rotation brake energy recovery system
CN207391839U (en) A kind of drainer for washer and washing machine
CN205423366U (en) Power unit type full -hydraulic drilling machine's double pump open circuit hydraulic system
CN106907376A (en) The electrohydraulic control method of electrohydraulic control system, engineering machinery and pivoting support
CN104675343B (en) A kind of pressure controlled safety control of horizontal directional drilling machine vice
CN207513968U (en) Metal beam block pre-chopped machine hydraulic system
WO2024036970A1 (en) Micro-angle stepping control method for hydraulic motor
CN207246144U (en) Two-restriction formula underground drill rig multiple directional control valve
CN202970675U (en) Hydraulic control system for rotary expansion device of rotary drilling rig
CN107503999A (en) Metal beam block pre-chopped machine hydraulic system
CN202023744U (en) Water circulation system for water ring vacuum pump
CN108724065A (en) A kind of hydraulic valve installation complementary locating formations
CN206816581U (en) A kind of coiling machine movable supporting rotating hydraulic control loop
CN108194302A (en) The big pump compound pump valve of front end strong inverse flow low-resistance
CN204627464U (en) The pressure controlled safety control of horizontal directional drilling machine vice
CN208010978U (en) Multistation signal with transmission arm opens fuel path switch conversion control device
CN207777320U (en) The curved pin telescopic control device of double-station oil circuit tandem
CN207361845U (en) Ultrafiltration membrane pipe automatic dredging device
CN207892906U (en) A kind of all hydraulic caterpillar reverse circulation engineering drilling rig dedicated integrated valve group

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant