CN103883578A - Novel hydraulic control system for sliding gate - Google Patents
Novel hydraulic control system for sliding gate Download PDFInfo
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- CN103883578A CN103883578A CN201410065227.4A CN201410065227A CN103883578A CN 103883578 A CN103883578 A CN 103883578A CN 201410065227 A CN201410065227 A CN 201410065227A CN 103883578 A CN103883578 A CN 103883578A
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Abstract
The invention relates to a novel hydraulic control system for a sliding gate. An automatic control loop, a manual control loop and an emergency shutdown loop control a sliding gate hydraulic cylinder, and are isolated from one another; the automatic control loop is isolated from the emergency closed loop through a second two-position four-way electromagnetic directional valve; and the manual control loop is isolated from the emergency closed loop through a fourth high-pressure ball valve, a fifth high-pressure ball valve, a sixth high-pressure ball valve and a seventh high-pressure ball valve. The novel hydraulic control system for the sliding gate is provided with a control loop for a first two-position electromagnetic directional valve, a third one-way valve and a fourth one-way valve, and the sliding gate hydraulic cylinder can be automatically closed by the loop when an electrical system is out of work; and the novel hydraulic control system also comprises a control loop for a second two-position electromagnetic directional valve and a hydraulic control one-way valve, and a high-pressure oil source can be reliably closed by the loop when the sliding gate hydraulic cylinder is assembled or disassembled. The novel hydraulic control system for the sliding gate has the advantages that the novel hydraulic control system is simple in structure, high in using reliability and convenient to maintain; an electrical control mode is simple; and the safety of a system is outstanding.
Description
Technical field
The invention belongs to and smelt control technique field, be specifically related to a kind of Novel sliding mouth of a river hydraulic control system.
Background technique
Both at home and abroad for the oil hydraulic cylinder control device in the slide gate nozzle hydraulics field of continuous casting steel machine, mainly contain following problem at present:
1, slide gate nozzle oil hydraulic cylinder only has electric operation mode, can not manually-operable slide gate nozzle oil hydraulic cylinder under power down mode normally open and close;
2, slide gate nozzle oil hydraulic cylinder has the control of many group hydrovalves, but for not isolation between the hydrovalve of emergency cut-off and other hydrovalves, thereby can not work reliably for the hydrovalve of emergency cut-off in the state of accident;
3, in slide gate nozzle oil hydraulic cylinder mounting point and slide gate nozzle oil hydraulic cylinder normal operation position, identical for controlling the pressure size of slide gate nozzle oil hydraulic cylinder, easily because operator's operate miss, cause accident in the time that slide gate nozzle oil hydraulic cylinder is installed to open, thereby cause molten steel outflow, occur larger industrial accident.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of Novel sliding mouth of a river hydraulic control system, and to overcome, the operator scheme existing in prior art is single, there is no isolation between hydraulic control valve group, control the defect that pressure size is identical and Safety performance is not high of oil hydraulic cylinder.
For addressing the above problem, technological scheme of the present invention is:
A kind of Novel sliding mouth of a river hydraulic control system, comprises principal pressure pipeline and return tube, and wherein principal pressure pipeline P hydraulic fluid port is provided with pressure gauge, and connects by principal pressure tube and tube road B; Return tube T mouth is connected with pipeline A through return tube; Pipeline A, B are connected with two chambeies of slide gate nozzle oil hydraulic cylinder by the first high-pressure rubber pipe, the second high-pressure rubber pipe respectively, and described pipeline principal pressure pipeline P hydraulic fluid port is connected with reduction valve pressure hydraulic fluid port P by the first high-pressure ball valve respectively and is connected with the pressure hydraulic fluid port P5 of the first 3-position 4-way solenoid directional control valve, be connected, be connected with the pressure hydraulic fluid port P7 of the second 3-position 4-way solenoid directional control valve by Pilot operated check valve with the pressure hydraulic fluid port P6 of the second two four-way electromagnetic reversing valves by flow controller.
Described principal pressure pipeline P hydraulic fluid port is connected with accumulator by the first high-pressure ball valve, the second one-way valve, the second high-pressure ball valve respectively, then is connected with the pressure hydraulic fluid port P1 of hand-operated direction valve by the first high-pressure ball valve, the second one-way valve successively; Be connected with the pressure hydraulic fluid port P2 of the first two solenoid directional control valves by the first high-pressure ball valve, the second one-way valve successively again;
Control port A1, the B1 of described hand-operated direction valve is respectively by the first stacking type hydraulic control check valve, the first overlapping throttle valve, the first pressure measuring tie-in, and the second pressure measuring tie-in, the 4th high-pressure ball valve, the 5th high-pressure ball valve are connected with pipeline A, B.
Control port A2, the B2 of described the first two solenoid directional control valves is respectively by the 3rd one-way valve), the 4th one-way valve, the 3rd pressure measuring tie-in, the 4th pressure measuring tie-in, the 6th high-pressure ball valve, the 7th high-pressure ball valve are connected with pipeline A, B.
Control port A5, the B5 of described the first 3-position 4-way solenoid directional control valve is connected with pressure hydraulic fluid port P4, the oil return inlet T 4 of the second two four-way electromagnetic reversing valves by second stacking type hydraulic control check valve the second overlapping throttle valve respectively;
Control port A3, the B3 of described the first two four-way electromagnetic reversing valves is connected with pressure hydraulic fluid port P4, the oil return inlet T 4 of the second two four-way electromagnetic reversing valves;
Control port A7, the B7 of described the second 3-position 4-way solenoid directional control valve is connected with pressure hydraulic fluid port P4, the oil return inlet T 4 of the second two four-way electromagnetic reversing valves by the 3rd stacking type hydraulic control check valve, the 3rd overlapping throttle valve the 5th pressure measuring tie-in, the 6th pressure measuring tie-in respectively;
Control port A4, the B4 of described the second two four-way electromagnetic reversing valves is connected with pipeline A, B by the 6th high-pressure ball valve, the 7th high-pressure ball valve respectively.
Described return tube is connected with pressure relay through third high pressure ball valve, one-way valve.
Described principal pressure pipeline is connected with return tube through the second one-way valve, the second high-pressure ball valve, relief valve.
Described Pilot operated check valve is connected with principal pressure pipeline, Pilot operated check valve drain tap is connected with return tube, Pilot operated check valve control port be connected with the control port B6 of the second two four-way electromagnetic reversing valves.
Technique scheme comprises automatic control loop, manual control loop and emergency cut-off loop; Isolation respectively between each loop, wherein between automatic control loop and emergency cut-off loop by the second two four-way electromagnetic reversing valve isolation, manually between control loop and emergency cut-off loop, isolate by the 4th high-pressure ball valve, the 5th high-pressure ball valve, the 6th high-pressure ball valve, the 7th high-pressure ball valve.
technique effect of the present invention and advantage are as follows:
1. the present invention is made up of automatic control loop, manually control loop and emergency cut-off loop.In automatic control loop, by the decompression control of relief circuit, for the earth pressure release in the time that oil hydraulic cylinder is installed, after earth pressure release, operator can install slide gate nozzle oil hydraulic cylinder easily; By the Decompression Controlling in Decompression Controlling loop, operator can install oil hydraulic cylinder safely and reliably in slide gate nozzle oil hydraulic cylinder mounting point; By high voltage control loop, slide gate nozzle oil hydraulic cylinder can normally be opened in working position and close, and can also guarantee operator's closing pressure oil circuit reliably in the time of the oil hydraulic cylinder of slide gate nozzle oil hydraulic cylinder mounting point simultaneously, avoids causing great industrial accident; In emergency cut-off loop, can under the state of electrical system and hydraulic system fails, close reliably slide gate nozzle oil hydraulic cylinder by controlling this group loop, there will not be industrial accident; Manually, in the situation that electrical system breaks down, manually controlling the opening and closing of slide gate nozzle oil hydraulic cylinder by this group loop of manually-operable in control loop, improve the reliability of system works, reduce the disorderly closedown time, improve the reliability of system.Wherein between automatic control loop, manually control loop and emergency cut-off loop, can isolate reliably.
The present invention have simple in structure, electric controling mode is simple, operational safety is high, security of system is given prominence to, be convenient to the features such as maintenance.
Accompanying drawing explanation
below in conjunction with embodiment's accompanying drawing, the present invention is described further.
Fig. 1 is structural representation of the present invention.
Reference character is:
The 101-the first high-pressure ball valve, the 102-the second high-pressure ball valve, 103-third high pressure ball valve, the 104-the four high-pressure ball valve, the 105-the five high-pressure ball valve, the 106-the six high-pressure ball valve, the 107-the seven high-pressure ball valve, the 201-the first one-way valve, the 202-the second one-way valve, the 203-the three one-way valve, the 204-the four one-way valve, 3-pressure gauge, 4-accumulator, 5-relief valve, 6-pressure relay, 7-hand-operated direction valve, , 8-one-way valve, the 801-the first stacking type hydraulic control check valve, the 802-the second stacking type hydraulic control check valve, the 803-the three stacking type hydraulic control check valve, the 901-the first overlapping throttle valve, the 902-the second overlapping throttle valve, the 903-the three overlapping throttle valve, the 1001-the first pressure measuring tie-in, the 1002-the second pressure measuring tie-in, the 1003-the three pressure measuring tie-in, the 1004-the four pressure measuring tie-in, the 1005-the five pressure measuring tie-in, the 1006-the six pressure measuring tie-in, 1101-the first two solenoid directional control valve, 1102-the second two solenoid directional control valve, 1201-the first two four-way electromagnetic reversing valve, 1202-the second two four-way electromagnetic reversing valve, 13-reduction valve, the 1401-the first 3-position 4-way solenoid directional control valve, the 1402-the second 3-position 4-way solenoid directional control valve, 15-flow controller, 16-Pilot operated check valve, the 1701-the first high-pressure rubber pipe, the 1702-the second high-pressure rubber pipe, 18-slide gate nozzle oil hydraulic cylinder.
Embodiment
Embodiment 1,1 describes in detail by reference to the accompanying drawings.
A kind of Novel sliding mouth of a river hydraulic control system, comprises principal pressure pipeline and return tube, and wherein principal pressure pipeline P hydraulic fluid port is provided with pressure gauge 3, and connects by principal pressure tube and tube road B; Return tube T mouth is connected with pipeline A through return tube; Pipeline A, B are connected with two chambeies of slide gate nozzle oil hydraulic cylinder 18 by the first high-pressure rubber pipe 1701, the second high-pressure rubber pipe 1702 respectively, and described pipeline principal pressure pipeline P hydraulic fluid port is connected with the pressure hydraulic fluid port P of reduction valve 13 by the first high-pressure ball valve 101 respectively and is connected with the pressure hydraulic fluid port P5 of the first 3-position 4-way solenoid directional control valve 1401, be connected, be connected with the pressure hydraulic fluid port P7 of the second 3-position 4-way solenoid directional control valve 1402 by Pilot operated check valve 16 with the pressure hydraulic fluid port P6 of the second two four-way electromagnetic reversing valves 1102 by flow controller 15.
This scheme has realized the automatic control of slide gate nozzle oil hydraulic cylinder, simple in structure, practical.
Embodiment 2; 1 describe by reference to the accompanying drawings.
Described principal pressure pipeline P hydraulic fluid port is connected with accumulator 4 by the first high-pressure ball valve 101, the second one-way valve 202, the second high-pressure ball valve 102 respectively, then is connected with the pressure hydraulic fluid port P1 of hand-operated direction valve 7 by the first high-pressure ball valve 101, the second one-way valve 202 successively; Be connected with the pressure hydraulic fluid port P2 of the first two solenoid directional control valves 1101 by the first high-pressure ball valve 101, the second one-way valve 202 successively again;
Control port A1, the B1 of described hand-operated direction valve 7 is connected with pipeline A, B by the first stacking type hydraulic control check valve 801, the first overlapping throttle valve 901, the first pressure measuring tie-in 1001, the second pressure measuring tie-ins 1002, the 4th high-pressure ball valve 104, the 5th high-pressure ball valve 105 respectively.3. Novel sliding as claimed in claim 2 mouth of a river hydraulic control system, is characterized in that: described in
Control port A2, the B2 of the first two solenoid directional control valves 1101 is connected with pipeline A, B by the 3rd one-way valve 203, the 4th one-way valve 204, the 3rd pressure measuring tie-in 1003, the four pressure measuring tie-in 1004, the six high-pressure ball valves 106, the 7th high-pressure ball valve 107 respectively.
Control port A5, the B5 of described the first 3-position 4-way solenoid directional control valve 1401 is connected with pressure hydraulic fluid port P4, the oil return inlet T 4 of the second two four-way electromagnetic reversing valves 1202 by the second stacking type hydraulic control check valve 802, the second overlapping throttle valve 902 respectively;
Control port A3, the B3 of described the first two four-way electromagnetic reversing valves 1201 is connected with pressure hydraulic fluid port P4, the oil return inlet T 4 of the second two four-way electromagnetic reversing valves 1202;
Control port A7, the B7 of described the second 3-position 4-way solenoid directional control valve 1402 is connected with pressure hydraulic fluid port P4, the oil return inlet T 4 of the second two four-way electromagnetic reversing valves 1202 by the 3rd stacking type hydraulic control check valve 803, the 3rd overlapping throttle valve 903, the 5th pressure measuring tie-in 1005, the 6th pressure measuring tie-in 1006 respectively;
Control port A4, the B4 of described the second two four-way electromagnetic reversing valves 1202 is connected with pipeline A, B by the 6th high-pressure ball valve 106, the 7th high-pressure ball valve 107 respectively.
Described return tube is connected with pressure relay 6 through third high pressure ball valve 103, one-way valve 8.
Described principal pressure pipeline is connected with return tube through the second one-way valve 202, the second high-pressure ball valve 102, relief valve 5.
Described Pilot operated check valve 16 is connected with principal pressure pipeline, Pilot operated check valve 6 drain taps are connected with return tube, Pilot operated check valve 16 control ports be connected with the control port B6 of the second two four-way electromagnetic reversing valves 1102.
Wherein:
Pressure relay 6 is reported to the police for the low-pressure of accumulator accident oil sources;
Hand-operated direction valve 7 is for manually controlling opening and cutting out of slide gate nozzle oil hydraulic cylinder 18;
The first two solenoid directional control valves 1101 are for emergency cut-off electric and hydraulic system off-position lower slider mouth of a river oil hydraulic cylinder;
The first two four-way electromagnetic reversing valves 1201 are for the earth pressure release of slide gate nozzle oil hydraulic cylinder;
The second two four-way electromagnetic reversing valves 1202 are for the isolation between slide gate nozzle oil hydraulic cylinder automatic control loop and emergency cut-off loop;
The automatic control during for the installation and removal of slide gate nozzle oil hydraulic cylinder of reduction valve 13, the first 3-position 4-way solenoid directional control valve 1401, this pressure capable of regulating, guarantees the safe and reliable of system;
The second 3-position 4-way solenoid directional control valve 1402 normally opens and cuts out for slide gate nozzle oil hydraulic cylinder.
below by the concrete operation method of this control system, the technical problem of solution of the present invention is described.
The present invention is in the time of normal work, by control the first two solenoid directional control valves 1101 electric, the second two four-way electromagnetic reversing valves 1202 electric, the first two four-way electromagnetic reversing valve 1201 dead electricity, the second two solenoid directional control valves 1102 electric, the electromagnet a that controls respectively the second 3-position 4-way solenoid directional control valve 1402 obtains electric, and slide gate nozzle oil hydraulic cylinder is normally closed; The electromagnet b that controls respectively the second 3-position 4-way solenoid directional control valve 1402 obtains electric, and slide gate nozzle oil hydraulic cylinder is normally opened; Thereby realize the normal work of slide gate nozzle oil hydraulic cylinder.
The present invention is in the time of normal work, in the time that electrical system breaks down, by closing the 6th high-pressure ball valve 106, the 7th high-pressure ball valve 107, open the 4th high-pressure ball valve 104, the 5th high-pressure ball valve 105, operator operate respectively hand-operated direction valve 7, control respectively slide gate nozzle oil hydraulic cylinder and normally open and close; Thereby realize slide gate nozzle oil hydraulic cylinder and normally open and close work under electrical malfunction, reduce the disorderly closedown time, improve the reliability of system.
When the present invention installs in slide gate nozzle oil hydraulic cylinder mounting point and dismantles oil hydraulic cylinder, by control the first two solenoid directional control valves 1101 electric, the second two four-way electromagnetic reversing valves 1202 electric, the first two four-way electromagnetic reversing valve 1201 dead electricity, the second two solenoid directional control valve 1102 dead electricity, the electromagnet a that controls respectively the first 3-position 4-way solenoid directional control valve 1401 obtains electric, and slide gate nozzle oil hydraulic cylinder low pressure is closed; The electromagnet b that controls respectively the first 3-position 4-way solenoid directional control valve 1401 obtains electric, and slide gate nozzle oil hydraulic cylinder low pressure is opened; Thereby realize the leakage test before Auto-mounting, dismounting and the use of slide gate nozzle oil hydraulic cylinder in the time of mounting point.
When the present invention installs in slide gate nozzle oil hydraulic cylinder mounting point and dismantles oil hydraulic cylinder, by control the first two solenoid directional control valves 1101 electric, the second two four-way electromagnetic reversing valves 1202 electric, the second two solenoid directional control valve 1102 dead electricity, control the first two four-way electromagnetic reversing valves 1201 electric, the off-load of slide gate nozzle oil hydraulic cylinder; Thereby realize, the off-load of slide gate nozzle oil hydraulic cylinder in the time of mounting point installed, dismounting.
The present invention is in the time that slide gate nozzle electrical system and hydraulic oil source all break down, the second two automatic dead electricity of four-way electromagnetic reversing valve 1202, the first two automatic dead electricity of solenoid directional control valve 1101, slide gate nozzle oil hydraulic cylinder uses the pressure oil-source of accumulator 4, controlling slide gate nozzle oil hydraulic cylinder automatic emergency closes, flowing of molten steel can be not out of control, guaranteed the trouble free service of system.
, under the state of electrical system and the normal work of hydraulic pressure oil supply system slide gate nozzle oil hydraulic cylinder is normally opened and closing control by the known automatic control loop being formed by relief circuit, pressure reducing circuit and high tension loop of above-mentioned explanation.Wherein, by relief circuit, operator can install slide gate nozzle oil hydraulic cylinder easily; By pressure reducing circuit, operator can be safely at oil hydraulic cylinder mounting point handling slide gate nozzle oil hydraulic cylinder; By high tension loop, operator can normally open and close slide gate nozzle oil hydraulic cylinder, can also in the time of handling slide gate nozzle oil hydraulic cylinder, close high pressure fuel source simultaneously, and the safety of assurance system and reliable, avoids occurring industrial accident.
Emergency cut-off control, under the state of electrical system and the inefficacy of hydraulic pressure oil supply system, is carried out to slide gate nozzle oil hydraulic cylinder in emergency cut-off loop, prevents industrial accident.Manually control loop, under the state of electrical system and the inefficacy of hydraulic pressure oil supply system, carries out normal opening and closing to slide gate nozzle oil hydraulic cylinder and controls, and reduces because systematic failures causes shutdown the reliability of raising system.
The parts that the present embodiment does not describe in detail and structure belong to well-known components and common structure or the conventional means of the industry, here not narration one by one.
Claims (7)
1. a Novel sliding mouth of a river hydraulic control system, comprises principal pressure pipeline and return tube, and wherein principal pressure pipeline P hydraulic fluid port is provided with pressure gauge (3), and connects by principal pressure tube and tube road B, return tube T mouth is connected with pipeline A through return tube, pipeline A, B is respectively by the first high-pressure rubber pipe (1701), the second high-pressure rubber pipe (1702) is connected with two chambeies of slide gate nozzle oil hydraulic cylinder (18), it is characterized in that: described pipeline principal pressure pipeline P hydraulic fluid port is connected and is connected with the pressure hydraulic fluid port P5 of the first 3-position 4-way solenoid directional control valve (1401) with the pressure hydraulic fluid port P of reduction valve (13) by the first high-pressure ball valve (101) respectively, be connected with the pressure hydraulic fluid port P6 of the second two four-way electromagnetic reversing valves (1102) by flow controller (15), be connected with the pressure hydraulic fluid port P7 of the second 3-position 4-way solenoid directional control valve (1402) by Pilot operated check valve (16).
2. Novel sliding as claimed in claim 1 mouth of a river hydraulic control system, it is characterized in that: described principal pressure pipeline P hydraulic fluid port is connected with accumulator (4) by the first high-pressure ball valve (101), the second one-way valve (202), the second high-pressure ball valve (102) respectively, then be connected with the pressure hydraulic fluid port P1 of hand-operated direction valve (7) by the first high-pressure ball valve (101), the second one-way valve (202) successively; Be connected with the pressure hydraulic fluid port P2 of the first two solenoid directional control valves (1101) by the first high-pressure ball valve (101), the second one-way valve (202) successively again;
Control port A1, the B1 of described hand-operated direction valve (7) is respectively by the first stacking type hydraulic control check valve (801), the first overlapping throttle valve (901), the first pressure measuring tie-in (1001), and the second pressure measuring tie-in (1002), the 4th high-pressure ball valve (104), the 5th high-pressure ball valve (105) are connected with pipeline A, B.
3. Novel sliding as claimed in claim 2 mouth of a river hydraulic control system, is characterized in that: described in
Control port A2, the B2 of the first two solenoid directional control valves (1101) is respectively by the 3rd one-way valve (203), the 4th one-way valve (204), the 3rd pressure measuring tie-in (1003), the 4th pressure measuring tie-in (1004), the 6th high-pressure ball valve (106), the 7th high-pressure ball valve (107) are connected with pipeline A, B.
4. Novel sliding as claimed in claim 3 mouth of a river hydraulic control system, is characterized in that: control port A5, the B5 of described the first 3-position 4-way solenoid directional control valve (1401) is connected with pressure hydraulic fluid port P4, the oil return inlet T 4 of the second two four-way electromagnetic reversing valves (1202) by the second stacking type hydraulic control check valve (802), the second overlapping throttle valve (902) respectively;
Control port A3, the B3 of described the first two four-way electromagnetic reversing valves (1201) is connected with pressure hydraulic fluid port P4, the oil return inlet T 4 of the second two four-way electromagnetic reversing valves (1202);
Control port A7, the B7 of described the second 3-position 4-way solenoid directional control valve (1402) is connected with pressure hydraulic fluid port P4, the oil return inlet T 4 of the second two four-way electromagnetic reversing valves (1202) by the 3rd stacking type hydraulic control check valve (803), the 3rd overlapping throttle valve (903), the 5th pressure measuring tie-in (1005), the 6th pressure measuring tie-in (1006) respectively;
Control port A4, the B4 of described the second two four-way electromagnetic reversing valves (1202) is connected with pipeline A, B by the 6th high-pressure ball valve (106), the 7th high-pressure ball valve (107) respectively.
5. as the Novel sliding mouth of a river hydraulic control system as described in one of any in claim 1-4, it is characterized in that: described return tube is connected with pressure relay (6) through third high pressure ball valve (103), one-way valve (8).
6. Novel sliding mouth of a river hydraulic control system as described in claim 5, is characterized in that: described principal pressure pipeline is connected with return tube through the second one-way valve (202), the second high-pressure ball valve (102), relief valve (5).
7. Novel sliding mouth of a river hydraulic control system as claimed in claim 6, is characterized in that: described Pilot operated check valve (16) is connected with principal pressure pipeline, Pilot operated check valve (16) drain tap is connected with return tube, Pilot operated check valve (16) control port be connected with the control port B6 of the second two four-way electromagnetic reversing valves (1102).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410065227.4A CN103883578B (en) | 2014-02-26 | 2014-02-26 | A kind of slide gate nozzle hydraulic control system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410065227.4A CN103883578B (en) | 2014-02-26 | 2014-02-26 | A kind of slide gate nozzle hydraulic control system |
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| CN103883578A true CN103883578A (en) | 2014-06-25 |
| CN103883578B CN103883578B (en) | 2016-08-17 |
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| CN105508316A (en) * | 2014-09-26 | 2016-04-20 | 宝钢工程技术集团有限公司 | Hydraulic fault protection based hydraulic device for downwards pressing sector section and application method thereof |
| CN110030222A (en) * | 2019-05-16 | 2019-07-19 | 中冶赛迪工程技术股份有限公司 | Its hydraulic system of a kind of differential hydraulic control loop of fluid control valve and application |
| CN110102730A (en) * | 2019-04-18 | 2019-08-09 | 宣化钢铁集团有限责任公司 | A kind of crystallizer pouring procedure |
| CN111550629A (en) * | 2020-05-09 | 2020-08-18 | 中国船舶重工集团公司第七一六研究所 | Emergency release device suitable for ship loading and unloading arm |
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| CN111550629A (en) * | 2020-05-09 | 2020-08-18 | 中国船舶重工集团公司第七一六研究所 | Emergency release device suitable for ship loading and unloading arm |
| CN111550629B (en) * | 2020-05-09 | 2024-05-03 | 中国船舶集团有限公司第七一六研究所 | Emergency disengaging gear suitable for ship loading and unloading arm |
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| Publication number | Publication date |
|---|---|
| CN103883578B (en) | 2016-08-17 |
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