CN109176949B - Cutter head moving hydraulic system of pressure limiting type underwater pelletizer and application method thereof - Google Patents
Cutter head moving hydraulic system of pressure limiting type underwater pelletizer and application method thereof Download PDFInfo
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- CN109176949B CN109176949B CN201811200403.5A CN201811200403A CN109176949B CN 109176949 B CN109176949 B CN 109176949B CN 201811200403 A CN201811200403 A CN 201811200403A CN 109176949 B CN109176949 B CN 109176949B
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- 238000000034 method Methods 0.000 title claims abstract description 11
- 239000003921 oil Substances 0.000 claims description 92
- 230000001105 regulatory effect Effects 0.000 claims description 20
- 239000010720 hydraulic oil Substances 0.000 claims description 11
- 230000005611 electricity Effects 0.000 claims 2
- 238000012797 qualification Methods 0.000 abstract description 4
- 239000002245 particle Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004886 head movement Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/02—Making granules by dividing preformed material
- B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
- B26D1/01—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
- B26D1/04—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a linearly-movable cutting member
- B26D1/06—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a linearly-movable cutting member wherein the cutting member reciprocates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D5/00—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
- B26D5/08—Means for actuating the cutting member to effect the cut
- B26D5/12—Fluid-pressure means
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Shearing Machines (AREA)
Abstract
The invention discloses a cutter head moving hydraulic system of a pressure limiting type underwater granulator and a using method thereof, wherein the system comprises a motor, an oil pump, a first channel, a second channel, an oil tank, an oil cylinder and a cutter head, the oil pump is connected with the motor, the inlet end of the oil pump is communicated with the oil tank, one end of the first channel and one end of the second channel are both communicated with the outlet end of the oil pump, the other end of the first channel is communicated with a first cavity of the oil cylinder, a first overflow valve communicated with the oil tank is arranged on the first channel, the other end of the second channel can be communicated with a second cavity of the oil cylinder through an electromagnetic reversing valve, a second overflow valve communicated with the oil tank is arranged on the second channel, a pressure difference is arranged between the first channel and the second channel, and one end of the cutter head is fixed at one end of a piston rod of the oil cylinder. According to the invention, a hydraulic system is used for replacing a pneumatic system, so that the stability of a cutter head moving mechanism is greatly improved, and the product qualification rate is improved.
Description
Technical Field
The invention relates to the technical field of hydraulic systems, in particular to a pressure limiting type underwater pelletizer cutterhead moving hydraulic system and a using method thereof.
Background
The cutter head moving mechanism is an important process part of the underwater granulator, raw materials enter a die after being heated and then are extruded into a water chamber, the raw materials are cooled and then cut into particles by a cutter, and the shape and the size of the particles are directly determined by the stability of the cutter head moving mechanism.
The traditional cutter head moving mechanism is controlled by a pneumatic system, gas can be compressed, and at the moment of pressure fluctuation, the instantaneous gas can be compressed to cause unstable cutter head movement due to larger peak pressure, so that the size of cutting particles is different, and the product percent of pass is reduced.
Disclosure of Invention
The invention aims to provide a cutter head moving hydraulic system of a pressure limiting type underwater pelletizer and a using method thereof, so as to solve the problems in the prior art, greatly improve the stability of a disc moving mechanism and improve the qualification rate of products.
In order to achieve the above object, the present invention provides the following solutions:
the invention provides a pressure limiting type underwater pelletizer cutterhead movable hydraulic system which comprises a motor, an oil pump, a first channel, a second channel, an oil tank, an oil cylinder and a cutterhead, wherein the oil pump is connected with the motor, the inlet end of the oil pump is communicated with the oil tank, one end of the first channel and one end of the second channel are both communicated with the outlet end of the oil pump, the other end of the first channel is communicated with a first cavity of the oil cylinder, a first overflow valve communicated with the oil tank is arranged on the first channel and is used for adjusting the pressure in the first channel, the other end of the second channel can be communicated with a second cavity of the oil cylinder through an electromagnetic reversing valve, a second overflow valve communicated with the oil tank is arranged on the second channel and is used for adjusting the pressure in the second channel, a pressure difference exists between the first channel and the second channel, and one end of the cutterhead is fixed at one end of a piston rod of the oil cylinder.
Preferably, a first speed regulating valve is arranged on the first channel between the first overflow valve and the oil pump; and a second speed regulating valve is arranged on the second channel between the second overflow valve and the oil pump.
Preferably, a first pressure sensor and a first pressure gauge are arranged on the first channel between the first speed regulating valve and the first cavity, and a first pressure gauge switch is arranged between the first pressure gauge and the first channel; the second pressure sensor and the second pressure gauge are arranged on the second channel between the second speed regulating valve and the second cavity, and a second pressure gauge switch is arranged between the second pressure gauge and the second channel.
Preferably, the first channel between the first speed regulating valve and the oil pump and the second channel between the second speed regulating valve and the oil pump are all communicated with the oil pump through a main channel, a pressure measuring joint and a third overflow valve are arranged on the main channel and communicated with the oil tank, the pressure measuring joint is used for being connected with a pressure gauge, the third overflow valve is used for setting the highest safety limiting pressure, and a one-way valve is arranged between the third overflow valve and the oil pump.
Preferably, the second relief valve is a proportional relief valve, and the relief pressure of the second relief valve is automatically adjusted by a program.
Preferably, the oil pump is communicated with a P port of the electromagnetic directional valve, the second cavity is communicated with an A port of the electromagnetic directional valve, and the oil tank is communicated with a T port of the electromagnetic directional valve.
Preferably, coolers are arranged between the first overflow valve and the oil tank and between the second overflow valve and the oil tank.
Preferably, the oil cylinders are double-rod hydraulic cylinders, at least three oil cylinders are arranged, and a plurality of oil cylinders are uniformly distributed along the circumferential direction of the cutterhead and are arranged in parallel.
Preferably, the pressure difference is + -1 to + -3 MPa.
The invention also provides a use method of the hydraulic system for moving the cutterhead of the pressure limiting type underwater granulator, the oil pump is used for pumping out hydraulic oil, the hydraulic oil enters a first channel and a second channel through a one-way valve, pressure oil in the first channel enters a first cavity of an oil cylinder, an electromagnetic reversing valve is electrified, hydraulic oil in the second channel enters a second cavity of the oil cylinder through an opening A of the electromagnetic reversing valve, the pressure of the first channel is manually set through a first overflow valve, the pressure of the second channel is automatically set through a second overflow valve, when the oil cylinder needs to drive the cutterhead to move leftwards, the pressure difference between the first channel and the second channel is kept at-2 MPa until the cutterhead contacts the surface of a mould, when the cutterhead needs to retract, the oil cylinder moves rightwards to the tail end, when a host computer needs to retract quickly, the electromagnetic reversing valve is electrified, the pressure in the second channel is directly communicated with the oil cylinder through a opening T of the electromagnetic reversing valve, and the pressure in the second channel is 0, and the oil cylinder drives the cutterhead to retract quickly.
Compared with the prior art, the invention has the following technical effects: the hydraulic system is used for replacing a pneumatic system, and because the liquid can not be compressed, the pressure is more stable, and the optimized hydraulic system has the functions of protecting against overhigh forward pressure and compensating for overlow reverse pressure, so that the stability of the cutter head moving mechanism is greatly improved, and the product percent of pass is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a cutter head moving hydraulic system of a pressure limiting type underwater pelletizer;
wherein: the hydraulic oil pump comprises a motor, an oil pump, a 3-one-way valve, a 4-pressure measuring connector, a 5-first speed regulating valve, a 6-first overflow valve, a 7-first pressure gauge, an 8-first pressure gauge switch, a 9-first pressure sensor, a 10-second speed regulating valve, a 11-second overflow valve, a 12-second pressure gauge, a 13-second pressure gauge switch, a 14-second pressure sensor, a 15-electromagnetic directional valve, a 16-third overflow valve, a 17-oil cylinder, a 18-first cavity, a 19-second cavity, a 20-oil cylinder piston rod, a 21-cutter disc, a 22-die, a 23-first channel, a 24-second channel and a 25-oil tank.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by a person skilled in the art based on the embodiments of the invention without any inventive effort, are intended to fall within the scope of the invention.
In the description of the present invention, it should be understood that the terms "upper," "lower," "left," and "right" indicate orientations or positional relationships based on the orientations and positional relationships illustrated in the drawings, merely to facilitate the description of the structures and operation, and do not indicate or imply that the parts referred to must have a particular orientation, operate in a particular orientation, and thus are not to be construed as limiting the invention.
The invention aims to provide a cutter head moving hydraulic system of a pressure limiting type underwater pelletizer and a using method thereof, so as to solve the problems in the prior art, greatly improve the stability of a disc moving mechanism and improve the qualification rate of products.
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
As shown in fig. 1: the embodiment provides a cutter head moving hydraulic system of a pressure limiting type underwater pelletizer, which comprises a motor 1, an oil pump 2, a first channel 23, a second channel 24, an oil tank 25, an oil cylinder 17 and a cutter head 21. The oil pump 2 is connected to the motor 1, and an inlet end of the oil pump 2 communicates with the oil tank 25. One end of the first channel 23 and one end of the second channel 24 are both communicated with the outlet end of the oil pump 2, the other end of the first channel 23 is communicated with the first cavity 18 of the oil cylinder 17, the first channel 23 is provided with a first overflow valve 6 communicated with an oil tank 25, and the first overflow valve 6 is used for adjusting the pressure in the first channel 23. The other end of the second channel 24 can be communicated with the second cavity 19 of the oil cylinder through the electromagnetic directional valve 15, a second overflow valve 11 communicated with an oil tank 25 is arranged on the second channel 24, and the second overflow valve 11 is used for adjusting the pressure in the second channel 24. The adjustment of the first relief valve 6 and the second relief valve 11 may be performed either manually or electrically. The second relief valve 11 is preferably a proportional relief valve, and the relief pressure of the second relief valve 11 is automatically adjusted by a program. Coolers are arranged between the first overflow valve 6, the second overflow valve 11 and the oil tank 25, and hydraulic oil in the first channel 23 and the second channel 24 can return to the oil tank 25 after being cooled. The first passage 23 and the second passage 24 have a pressure difference therebetween, specifically, the pressure difference is preferably ±1 to ±3MPa, more preferably ±2MPa. One end of the cutterhead 21 is fixed to one end of a piston rod of the oil cylinder 17, and the other end of the cutterhead 21 faces the die 22, so that the cutterhead 21 can be in contact with the die 22. The cylinders 17 are preferably double-rod hydraulic cylinders, the number of the cylinders 17 is at least three, more preferably three, and the three cylinders 17 are uniformly distributed along the circumferential direction of the cutterhead 21 and are arranged in parallel. A first speed regulating valve 5 is arranged on a first channel 23 between the first overflow valve 6 and the oil pump 2, and a second speed regulating valve 10 is arranged on a second channel 24 between the second overflow valve 11 and the oil pump 2.
A first pressure sensor 9 and a first pressure gauge 7 are arranged on a first channel 23 between the first speed regulating valve 5 and the first cavity 18, and a first pressure gauge switch 8 is arranged between the first pressure gauge 7 and the first channel 23 and used for detecting the pressure of the first channel 23. A second pressure sensor 14 and a second pressure gauge 12 are arranged on a second channel 24 between the second speed regulating valve 10 and the second cavity 19, and a second pressure gauge switch 13 is arranged between the second pressure gauge 12 and the second channel 24 and used for detecting the pressure of the second channel 24. The first channel 23 between the first speed regulating valve 5 and the oil pump 2 and the second channel 24 between the second speed regulating valve 10 and the oil pump 2 are both communicated with the oil 2 through a main channel, a pressure measuring joint 4 and a third overflow valve 16 communicated with an oil tank 25 are arranged on the main channel, the pressure measuring joint 4 can be connected with a pressure gauge for detecting the pressure of the main channel, the third overflow valve 16 is used for setting the highest safe limiting pressure, the highest safe limiting pressure is preferably 7MPa, and a one-way valve 3 is arranged between the third overflow valve 16 and the oil pump 2. The oil pump 2 is communicated with the P port of the electromagnetic directional valve 15, the second cavity 19 is communicated with the A port of the electromagnetic directional valve 15, and the oil tank 25 is communicated with the T port of the electromagnetic directional valve 15.
The embodiment also provides a use method of the hydraulic system for moving the cutterhead of the pressure limiting underwater pelletizer, the oil pump 2 pumps hydraulic oil out, the hydraulic oil enters the first channel 23 and the second channel 24 through the one-way valve 3 simultaneously, pressure oil in the first channel 23 enters the first cavity 18 of the oil cylinder 17, the electromagnetic directional valve 15 is electrified, hydraulic oil in the second channel 24 enters the second cavity 19 of the oil cylinder 17 through an A port of the electromagnetic directional valve 15, the pressure of the first channel 23 is manually set through the first overflow valve 6, the pressure of the second channel 24 is automatically set through the second overflow valve 11, when the oil cylinder 17 needs to drive the cutterhead 21 to move leftwards, the pressure difference between the first channel 23 and the second channel 24 is kept to be-2 MPa, specifically, the pressure of the first channel 23 is set to be 4MPa, the pressure of the second channel 24 is set to be 6MPa until the cutterhead 21 contacts the surface of the die 22, when the cutterhead needs to be powered, specifically, the pressure difference between the first channel 23 is kept to be 4MPa, the pressure of the second channel 24 is set to be 2MPa, the second channel 24 is set to be quickly retracted to the right through the electromagnetic directional valve 15, and the electromagnetic directional valve 25 is required to be quickly retracted to be in the end of the oil cylinder 17 to be in the state of the main machine, and the electromagnetic directional valve is required to be quickly retracted to be in the end of the second channel 21 to be in the state of the electromagnetic directional valve 25, and the main machine is in the state when the second channel is required to be quickly retracted to be in the end to be in the state 0.
According to the cutter head moving hydraulic system of the pressure limiting type underwater pelletizer, a hydraulic system is used for replacing a pneumatic system, and because liquid cannot be compressed, the pressure is more stable, the optimized hydraulic system has the functions of protecting against overhigh forward pressure and compensating for overlow reverse pressure, so that the stability of a cutter head moving mechanism is greatly improved, and the product qualification rate is improved.
The principles and embodiments of the present invention have been described in this specification with reference to specific examples, the description of which is only for the purpose of aiding in understanding the method of the present invention and its core ideas; also, it is within the scope of the present invention to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the invention.
Claims (8)
1. A pressure limiting type underwater pelletizer cutterhead moving hydraulic system is characterized in that: the oil pump is connected with the motor, the inlet end of the oil pump is communicated with the oil tank, one end of the first channel and one end of the second channel are both communicated with the outlet end of the oil pump, the other end of the first channel is communicated with a first cavity of the oil cylinder, a first overflow valve communicated with the oil tank is arranged on the first channel and used for adjusting the pressure in the first channel, the other end of the second channel can be communicated with a second cavity of the oil cylinder through an electromagnetic reversing valve, a second overflow valve communicated with the oil tank is arranged on the second channel and used for adjusting the pressure in the second channel, a pressure difference is arranged between the first channel and the second channel, and one end of the cutterhead is fixed at one end of a piston rod of the oil cylinder; the number of the oil cylinders is at least three, and a plurality of the oil cylinders are uniformly distributed along the circumferential direction of the cutterhead and are arranged in parallel; a first speed regulating valve is arranged on the first channel between the first overflow valve and the oil pump; a second speed regulating valve is arranged on the second channel between the second overflow valve and the oil pump; the first channel between the first speed regulating valve and the oil pump and the second channel between the second speed regulating valve and the oil pump are communicated with the oil pump through a main channel; the overflow pressure of the second overflow valve is automatically adjusted through a program; the oil pump is communicated with the P port of the electromagnetic directional valve, the second cavity is communicated with the A port of the electromagnetic directional valve, and the oil tank is communicated with the T port of the electromagnetic directional valve.
2. The pressure limiting type underwater pelletizer cutter head moving hydraulic system of claim 1, wherein: a first pressure sensor and a first pressure gauge are arranged on the first channel between the first speed regulating valve and the first cavity, and a first pressure gauge switch is arranged between the first pressure gauge and the first channel; the second pressure sensor and the second pressure gauge are arranged on the second channel between the second speed regulating valve and the second cavity, and a second pressure gauge switch is arranged between the second pressure gauge and the second channel.
3. The pressure limiting type underwater pelletizer cutter head moving hydraulic system of claim 1, wherein: the main channel is provided with a pressure measuring joint and a third overflow valve communicated with the oil tank, the pressure measuring joint is used for being connected with a pressure gauge, the third overflow valve is used for setting the highest safety limiting pressure, and a one-way valve is arranged between the third overflow valve and the oil pump.
4. The pressure limiting type underwater pelletizer cutter head moving hydraulic system of claim 1, wherein: the second overflow valve is a proportional overflow valve.
5. The pressure limiting type underwater pelletizer cutter head moving hydraulic system of claim 1, wherein: and coolers are arranged between the first overflow valve and the oil tank as well as between the second overflow valve and the oil tank.
6. The pressure limiting type underwater pelletizer cutter head moving hydraulic system of claim 1, wherein: the oil cylinder is a double-rod hydraulic cylinder.
7. The pressure limiting type underwater pelletizer cutter head moving hydraulic system of claim 1, wherein: the pressure difference is +/-1 to +/-3 MPa.
8. A method of using the pressurized underwater pelletizer cutter head moving hydraulic system of claim 3, wherein: the oil pump beats hydraulic oil, get into first passageway and second passageway simultaneously through the check valve, hydraulic oil in the first passageway gets into the first cavity of hydro-cylinder, the electromagnetic directional valve gets into the electricity, hydraulic oil in the second passageway gets into the second cavity of hydro-cylinder through the A mouth of electromagnetic directional valve, the pressure of first passageway is set for through first overflow valve is manual, the pressure of second passageway is set for through second overflow valve is automatic, when the hydro-cylinder needs to drive the blade disc to move left, keep the pressure differential between first passageway and the second passageway to be-2 MPa, until the blade disc contacts the mould surface, when the blade disc needs to withdraw, set for the pressure differential between first passageway and the second passageway to be 2MPa, the hydro-cylinder moves right to the end, when the host computer breaks down, the blade disc needs to withdraw fast, the electromagnetic directional valve loses electricity, the pressure in the second passageway is 0 through the T mouth direct and the oil tank of electromagnetic directional valve, the quick withdrawal of the blade disc is driven to the hydro-cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811200403.5A CN109176949B (en) | 2018-10-16 | 2018-10-16 | Cutter head moving hydraulic system of pressure limiting type underwater pelletizer and application method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811200403.5A CN109176949B (en) | 2018-10-16 | 2018-10-16 | Cutter head moving hydraulic system of pressure limiting type underwater pelletizer and application method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109176949A CN109176949A (en) | 2019-01-11 |
| CN109176949B true CN109176949B (en) | 2024-01-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811200403.5A Active CN109176949B (en) | 2018-10-16 | 2018-10-16 | Cutter head moving hydraulic system of pressure limiting type underwater pelletizer and application method thereof |
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| Country | Link |
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| CN (1) | CN109176949B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201056039Y (en) * | 2007-11-21 | 2008-05-07 | 刘土法 | Granule device of submerged granule cutter |
| CN201833622U (en) * | 2010-08-09 | 2011-05-18 | 合肥锻压机床有限公司 | Hydraulic press with debugging function and hydraulic system thereof |
| CN202500839U (en) * | 2012-03-08 | 2012-10-24 | 大连元利流体技术有限公司 | Pneumatic-hydraulic control system for underwater granule-cutting of large granulator |
| CN205136165U (en) * | 2015-11-05 | 2016-04-06 | 长城重型机械制造有限公司 | Hydraulic pressure loading system |
| CN205838429U (en) * | 2016-06-27 | 2016-12-28 | 宝鸡石油机械有限责任公司 | Hydraulic disc type braking deivce for winch |
| CN208826849U (en) * | 2018-10-16 | 2019-05-07 | 大连华东液压件有限公司 | A kind of votage limit type underwater pelletizer cutterhead movable hydraulic system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009066974A (en) * | 2007-09-14 | 2009-04-02 | Kobe Steel Ltd | Underwater cutting and granulating method, and underwater cut granulator |
-
2018
- 2018-10-16 CN CN201811200403.5A patent/CN109176949B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201056039Y (en) * | 2007-11-21 | 2008-05-07 | 刘土法 | Granule device of submerged granule cutter |
| CN201833622U (en) * | 2010-08-09 | 2011-05-18 | 合肥锻压机床有限公司 | Hydraulic press with debugging function and hydraulic system thereof |
| CN202500839U (en) * | 2012-03-08 | 2012-10-24 | 大连元利流体技术有限公司 | Pneumatic-hydraulic control system for underwater granule-cutting of large granulator |
| CN205136165U (en) * | 2015-11-05 | 2016-04-06 | 长城重型机械制造有限公司 | Hydraulic pressure loading system |
| CN205838429U (en) * | 2016-06-27 | 2016-12-28 | 宝鸡石油机械有限责任公司 | Hydraulic disc type braking deivce for winch |
| CN208826849U (en) * | 2018-10-16 | 2019-05-07 | 大连华东液压件有限公司 | A kind of votage limit type underwater pelletizer cutterhead movable hydraulic system |
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| Publication number | Publication date |
|---|---|
| CN109176949A (en) | 2019-01-11 |
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