CN110541406A - Oil cylinder supporting device of double-cylinder rear-pull type hydraulic press - Google Patents
Oil cylinder supporting device of double-cylinder rear-pull type hydraulic press Download PDFInfo
- Publication number
- CN110541406A CN110541406A CN201910825350.4A CN201910825350A CN110541406A CN 110541406 A CN110541406 A CN 110541406A CN 201910825350 A CN201910825350 A CN 201910825350A CN 110541406 A CN110541406 A CN 110541406A
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- China
- Prior art keywords
- cylinder
- oil cylinder
- double
- type hydraulic
- pull type
- 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.)
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Links
- 239000003921 oil Substances 0.000 claims abstract description 35
- 239000010721 machine oil Substances 0.000 claims abstract description 23
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 12
- 239000010959 steel Substances 0.000 claims abstract description 12
- 210000004907 gland Anatomy 0.000 claims description 9
- 230000003014 reinforcing effect Effects 0.000 claims description 8
- 244000208734 Pisonia aculeata Species 0.000 claims description 7
- 238000003825 pressing Methods 0.000 claims description 7
- 230000000903 blocking effect Effects 0.000 claims description 4
- 239000010720 hydraulic oil Substances 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B7/00—Barrages or weirs; Layout, construction, methods of, or devices for, making same
- E02B7/20—Movable barrages; Lock or dry-dock gates
- E02B7/40—Swinging or turning gates
- E02B7/42—Gates of segmental or sector-like shape with horizontal axis
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/20—Other details, e.g. assembly with regulating devices
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Actuator (AREA)
Abstract
The invention discloses a double-cylinder rear-pull type hydraulic machine oil cylinder supporting device which comprises a double-cylinder rear-pull type hydraulic machine oil cylinder and a gate pier side wall, wherein a rectangular steel plate is pre-embedded in the position, close to a top platform, of the gate pier side wall, a rotating supporting seat is fixedly installed on the rectangular steel plate, the front end of the double-cylinder rear-pull type hydraulic machine oil cylinder is rotatably connected with an arc door, and the middle rear part of the double-cylinder rear-pull type hydraulic machine oil cylinder is fixedly connected with the rotating supporting seat. The cantilever hinge shaft of the invention is connected with the spherical hinge inner ring on the wheel type fixed seat to form a rotating body, the wheel type fixed seat forms a fixed body with the oil cylinder supporting base through a bolt or a screw, and when the piston rod of the double-cylinder rear-pull type hydraulic machine oil cylinder is contracted, the rotating body is rotationally connected with the fixed body through the spherical hinge, therefore, when in use, the double-cylinder rear-pull type hydraulic machine oil cylinder can be higher than a gate pier, and because the overhang part of the double-cylinder rear-pull type hydraulic machine oil cylinder is positioned at the side of a gate hole, the traffic is not influenced, the height of the gate pier is not required to.
Description
Technical Field
The invention relates to a double-cylinder rear-pull type hydraulic press oil cylinder supporting device, and belongs to the technical field of hydroelectric hydraulic engineering.
Background
for a double-cylinder rear-pull hydraulic machine, a hydraulic cylinder of the double-cylinder rear-pull hydraulic machine is generally provided with an end part hinged supporting device, the cylinder supporting device is generally provided with an integrally fixed cylinder structure, the structure is simple to manufacture and convenient to install, the application is wider in engineering, but the height of a gate pier needs to meet the requirement of placing and fixing the cylinder supporting device, so the height of the gate pier is generally higher than the outer edge of the cylinder supporting device by more than 0.5m, for some engineering with lower gate pier height, the center of the cylinder supporting device is higher than the platform elevation at the top of the gate pier, the upper part of the gate pier needs to be provided with a concrete pier fixed cylinder supporting device which is exposed out of a dam face, the attractiveness of dam face arrangement is poor, dam face traffic is sometimes even influenced, and if the height of the gate pier is integrally lifted, the dam face arrangement attractiveness and the dam. Therefore, the existing technology is still not perfect and needs to be further improved.
Disclosure of Invention
the invention aims to provide a double-cylinder rear-pull type hydraulic press oil cylinder supporting device to overcome the defects in the prior art.
The technical scheme of the invention is as follows: the double-cylinder rear-pull type hydraulic machine oil cylinder supporting device comprises a double-cylinder rear-pull type hydraulic machine oil cylinder and a gate pier side wall, wherein a rectangular steel plate is pre-embedded in the position, close to a top platform, of the gate pier side wall, a rotating supporting seat is fixedly installed on the rectangular steel plate, the front end of the double-cylinder rear-pull type hydraulic machine oil cylinder is rotatably connected with an arc door, and the middle rear portion of the double-cylinder rear-pull type hydraulic machine oil cylinder is fixedly connected with the rotating supporting seat.
Further, the rotation supporting seat comprises an oil cylinder supporting base fixedly connected to a rectangular steel plate, a cantilever hinge shaft is connected to the oil cylinder supporting base in a rotating mode, the cantilever hinge shaft is connected with the oil cylinder supporting base in a rotating mode through a spherical hinge, a sleeve is arranged at the end portion of the cantilever hinge shaft, a fixing barrel is sleeved on the middle rear portion of the oil cylinder of the double-cylinder pull-back type hydraulic machine, the fixing barrel is fixed to the oil cylinder of the double-cylinder pull-back type hydraulic machine in a welding mode, the sleeve is sleeved outside the fixing barrel, a blocking head is arranged at one end of the fixing barrel, an annular groove is formed in the outer wall of the other end of the fixing barrel, one end of the sleeve is in contact with the blocking head, the other end of the sleeve is in contact with two semicircular pressing plates embedded into the annular groove.
Furthermore, the spherical hinge is composed of a spherical hinge inner ring and a spherical hinge outer ring which are matched with each other, the center of the oil cylinder supporting base is fixedly connected with a wheel type fixing seat, transparent covers are symmetrically fixed on two sides of the wheel type fixing seat through screws, the spherical hinge outer ring is installed between the transparent covers on the two sides, the cantilever hinge shaft is composed of an outer end small shaft section, a middle shaft section and an inner end large shaft section, the inner end large shaft section and the sleeve are integrated, the spherical hinge inner ring is sleeved on the middle shaft section, the spherical hinge inner ring is in rotating fit with the spherical hinge outer ring, a shaft stopping sleeve is sleeved on the outer end small shaft section, a circular gland is arranged at the outer end of the shaft stopping sleeve, and the circular gland is fixed on the end part of the outer end small shaft section through screws.
Furthermore, the oil cylinder supporting base comprises a basic circular plate and a cylinder body welded on the basic circular plate, a supporting circular plate is welded on the inner wall of the cylinder body, a group of inner reinforcing ribs are uniformly welded on the lower portion, located in the cylinder body, of the supporting circular plate, and a group of outer reinforcing ribs are uniformly welded on the outer portion of the cylinder body.
furthermore, the side wall of the cylinder is uniformly provided with operation holes.
Furthermore, the wheel type fixing seat is composed of an annular convex body and an L-shaped annular connecting body connected to the circumference of the annular convex body.
Due to the adoption of the technical scheme, the invention has the advantages that: the middle rear part of the double-cylinder rear-pull hydraulic machine oil cylinder is fixed through the sleeve, the sleeve and the cantilever hinge shaft are of an integrated structure, the cantilever hinge shaft and the spherical hinge inner ring on the wheel type fixing seat are connected into a rotating body, the spherical hinge outer ring is fixed on the wheel type fixing seat through the transparent cover, the wheel type fixing seat and the oil cylinder supporting base form a fixing body through bolts or screws, when a piston rod of the double-cylinder rear-pull hydraulic machine oil cylinder is contracted, the rotating body is rotatably connected with the fixing body through the spherical hinge formed by the spherical hinge inner ring and the spherical hinge outer ring, therefore, the double-cylinder rear-pull hydraulic machine oil cylinder can be higher than a brake pier when in use, and as the outer suspension part of the double-cylinder rear-pull hydraulic machine oil cylinder is positioned on the side of a brake hole, traffic is not; the tail end of the cantilever hinge shaft is fixedly connected with a circular gland which can effectively prevent the stop shaft sleeve from loosening, so that the cantilever hinge shaft on the sleeve can be effectively prevented from being separated from the fixed seat in the rotation process of the double-cylinder pull-back type hydraulic press oil cylinder, and the reliability of the device is improved; in addition, the cantilever hinge shaft adopts a stepped shaft, so that the assembly is convenient.
Drawings
FIG. 1 is a schematic structural view of the arc door of the present invention in a closed state;
FIG. 2 is a structural diagram illustrating an open state of the arc door according to the present invention;
FIG. 3 is a cross-sectional view A-A of FIG. 1;
FIG. 4 is a cross-sectional view B-B of FIG. 3;
FIG. 5 is a cross-sectional view C-C of FIG. 3;
FIG. 6 is a cross-sectional view D-D of FIG. 3;
FIG. 7 is a cross-sectional view E-E of FIG. 5;
FIG. 8 is a schematic view showing a connection structure of the cylinder support base and the hinge shaft;
Fig. 9 is a schematic structural view of a hinge shaft;
FIG. 10 is a schematic structural view of a stationary barrel;
Figure 11 is a cross-sectional view of the wheel mount;
FIG. 12 is a front view of the cylinder support base;
FIG. 13 is a top view of FIG. 12;
FIG. 14 is a cross-sectional view I-I of FIG. 12;
FIG. 15 is a top view of a semi-circular platen;
fig. 16 is a sectional view G-G of fig. 15.
Description of reference numerals: 1-double-cylinder rear-pull type hydraulic machine oil cylinder, 2-top platform, 3-gate pier side wall, 4-rectangular steel plate, 5-rotating supporting seat, 6-oil cylinder supporting base, 7-cantilever hinge shaft, 8-sleeve, 9-retaining head, 10-annular groove, 11-fixed cylinder, 12-screw, 13-semicircular pressing plate, 14-chamfer, 15-small shaft section, 16-middle shaft section, 17-large shaft section, 18-spherical hinge, 19-transparent cover, 20-wheel type fixing seat, 21-shaft-stopping sleeve, 22-circular pressing cover, 23-cylinder, 24-basic circular plate, 25-supporting circular plate, 26-external reinforcing rib, 27-internal reinforcing rib, 28-annular convex body, 29-section L-shaped annular connecting body, 30-screw hole, 31-bolt, 32-operation hole, 33-spherical hinge inner ring and 34-spherical hinge outer ring.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings and examples.
The embodiment of the invention comprises the following steps: the structural schematic diagram of the oil cylinder supporting device of the double-cylinder rear-pull type hydraulic press is shown in fig. 1-2 and comprises a double-cylinder rear-pull type oil cylinder 1 and a gate pier side wall 3, a rectangular steel plate 4 is pre-embedded in the position, close to a top platform 2, of the gate pier side wall 3, a rotating supporting seat 5 is fixedly installed on the rectangular steel plate 4, the front end of the double-cylinder rear-pull type oil cylinder 1 is rotatably connected with an arc door, and the middle rear portion of the double-cylinder rear-pull type oil cylinder 1 is fixedly connected with the rotating supporting seat 5.
Referring to fig. 3 to 10, the rotary support base 5 includes an oil cylinder support base 6 fixedly connected to a rectangular steel plate 4, a cantilever hinge shaft 7 is rotatably connected on the oil cylinder supporting base 6, the cantilever hinge shaft 7 is rotatably connected with the oil cylinder supporting base 6 through a spherical hinge 18, the end part of the cantilever hinge shaft 7 is provided with a sleeve 8, the middle rear part of the double-cylinder rear-pull type hydraulic machine oil cylinder 1 is sleeved with a fixed cylinder body 11, and the fixed cylinder 11 is welded and fixed with the oil cylinder 1 of the double-cylinder rear-pull hydraulic press, the sleeve 8 is sleeved outside the fixed cylinder 11, a stop 9 is arranged at one end of the fixed cylinder body 11, an annular groove 10 is arranged on the outer wall of the other end of the fixed cylinder body 11, one end of the sleeve 8 is in contact with the stop head 9, the other end of the sleeve 8 is in contact with two semicircular pressing plates 13 embedded into the annular groove 10, and the semicircular pressing plates 13 are fixedly connected to the end part of the sleeve 8 through screws 12; referring to fig. 15 and 16, chamfers 14 are provided on both sides of the inner diameter of the semicircular pressure plate 13.
Referring to fig. 3, 8 and 9, the ball hinge 18 is composed of a ball hinge inner ring 33 and a ball hinge outer ring 34 which are mutually matched, the center of the oil cylinder supporting base 6 is fixedly connected with a wheel type fixing seat 20, transparent covers 19 are symmetrically fixed on two sides of the wheel type fixing seat 20 through screws 12, the ball hinge outer ring 34 is installed between the transparent covers 19 on the two sides, the cantilever hinge shaft 7 is composed of an outer end small shaft section 15, a middle shaft section 16 and an inner end large shaft section 17, the inner end large shaft section 17 and the sleeve 8 are integrated into a whole, the ball hinge inner ring 33 is sleeved on the middle shaft section 16, the ball hinge inner ring 33 is rotatably matched with the ball hinge outer ring 34, a stop shaft sleeve 21 is sleeved on the outer end small shaft section 15, a circular gland 22 is arranged at the outer end of the stop shaft sleeve 21, and the circular gland 22 is fixed on the end part of the outer end small shaft section 15 through the screws.
Referring to fig. 11, the wheel-type fixing base 20 is composed of an annular protrusion 28 and an L-shaped annular connecting body 29 connected to the circumference of the annular protrusion 28.
referring to fig. 12 to 14, the cylinder support base 6 includes a basic circular plate 24 and a cylinder 23 welded on the basic circular plate 24, a supporting circular plate 25 is welded on the inner wall of the cylinder 23, a set of inner reinforcing ribs 27 is uniformly welded on the lower portion of the supporting circular plate 25 in the cylinder 23, and a set of outer reinforcing ribs 26 is uniformly welded on the outer portion of the cylinder 23; the side wall of the cylinder 23 is uniformly provided with operation holes 32. Referring to fig. 8, the cylindrical body 23 and the support ring plate 25 are provided with screw holes 30 corresponding to the sectional L-shaped annular connecting bodies 29, and the sectional L-shaped annular connecting bodies 29 are fixedly connected to the cylindrical body 23 and the support ring plate 25 by screws 12 or bolts 31. When the bolt 31 is wrenched, the operation can be performed from the operation hole 32.
the middle rear part of the double-cylinder rear-pull type hydraulic machine oil cylinder 1 is fixed through the sleeve 8, the sleeve 8 and the cantilever hinge shaft 7 are of an integrated structure, the cantilever hinge shaft 7 and a spherical hinge inner ring 33 on the wheel type fixed seat 20 are connected to form a rotating body, a spherical hinge outer ring 34 is fixed on the wheel type fixed seat 20 through a transparent cover 19, the wheel type fixed seat 20 and an oil cylinder supporting base 6 form a fixed body through a bolt 31 or a screw 12, when a piston rod of the double-cylinder rear-pull type hydraulic machine oil cylinder 1 is contracted, the rotating body is rotationally connected with the fixed body through a spherical hinge 18 formed by the spherical hinge inner ring 33 and the spherical hinge outer ring 34, therefore, the double-cylinder rear-pull type hydraulic machine oil cylinder 1 can be higher than a brake pier when in use, and because the overhang part of the double-cylinder rear-pull type hydraulic machine oil cylinder 1 is positioned on the side of a; the circular gland 22 is fixedly connected to the tail end of the cantilever hinge shaft 7, and the circular gland 22 can effectively prevent the stop shaft sleeve 21 from loosening, so that the cantilever hinge shaft 7 on the sleeve 8 of the double-cylinder pull-back type hydraulic press oil cylinder 1 can be effectively prevented from being separated from the fixed seat 20 in the rotating process, and the reliability of the device is improved; in addition, the cantilever hinge shaft 7 adopts a stepped shaft, so that the assembly is convenient.
Claims (6)
1. the utility model provides a draw formula hydraulic press hydro-cylinder supporting arrangement behind double-cylinder, draws formula hydraulic press hydro-cylinder (1) and gate pier side wall (3) behind the double-cylinder, its characterized in that: a rectangular steel plate (4) is embedded in a position, close to a top platform (2), on a gate pier side wall (3), a rotating supporting seat (5) is fixedly installed on the rectangular steel plate (4), the front end of a double-cylinder rear-pull type hydraulic machine oil cylinder (1) is rotatably connected with an arc door, and the middle rear portion of the double-cylinder rear-pull type hydraulic machine oil cylinder (1) is fixedly connected with the rotating supporting seat (5).
2. The double cylinder rear pull type hydraulic press oil cylinder supporting device according to claim 1, characterized in that: the rotary supporting seat (5) comprises an oil cylinder supporting base (6) fixedly connected to a rectangular steel plate (4), a cantilever hinge shaft (7) is rotatably connected to the oil cylinder supporting base (6), the cantilever hinge shaft (7) is rotatably connected with the oil cylinder supporting base (6) through a spherical hinge (18), a sleeve (8) is arranged at the end of the cantilever hinge shaft (7), a fixed cylinder body (11) is sleeved on the middle rear portion of the double-cylinder pull-back type hydraulic oil cylinder (1), the fixed cylinder body (11) is welded and fixed with the double-cylinder pull-back type hydraulic oil cylinder (1), the sleeve (8) is sleeved outside the fixed cylinder body (11), a blocking head (9) is arranged at one end of the fixed cylinder body (11), an annular groove (10) is formed in the outer wall of the other end of the fixed cylinder body (11), one end of the sleeve (8) is in contact with the blocking head (9), and the other end of the sleeve (8) is in contact with two semicircular pressing plates (13) embedded into the annular groove (10), and the semicircular pressing plate (13) is fixedly connected to the end part of the sleeve (8) through a screw (12).
3. The double cylinder rear pull type hydraulic press oil cylinder supporting device according to claim 2, characterized in that: the spherical hinge (18) is composed of a spherical hinge inner ring (33) and a spherical hinge outer ring (34) which are mutually matched, the center of the oil cylinder supporting base (6) is fixedly connected with a wheel type fixed seat (20), transparent covers (19) are symmetrically fixed on two sides of the wheel type fixed seat (20) through screws (12), a spherical hinge outer ring (34) is arranged between the transparent covers (19) at the two sides, the cantilever hinge shaft (7) is composed of an outer end small shaft section (15), a middle shaft section (16) and an inner end large shaft section (17), the inner end large shaft section (17) is integrated with the sleeve (8), a spherical hinge inner ring (33) is sleeved on the middle shaft section (16), the spherical hinge inner ring (33) is rotationally matched with the spherical hinge outer ring (34), the outer end small shaft section (15) is sleeved with a shaft stopping sleeve (21), the outer end of the shaft stopping sleeve (21) is provided with a circular gland (22), and the circular gland (22) is fixed on the end part of the outer end small shaft section (15) through a screw (12).
4. The double cylinder pullback hydraulic press oil cylinder support device according to claim 2 or 3, characterized in that: the oil cylinder supporting base (6) comprises a basic circular plate (24) and a cylinder (23) welded on the basic circular plate (24), a supporting circular plate (25) is welded on the inner wall of the cylinder (23), a group of inner reinforcing ribs (27) are uniformly welded on the lower portion, located on the supporting circular plate (25), of the cylinder (23), and a group of outer reinforcing ribs (26) are uniformly welded on the outer portion of the cylinder (23).
5. the double cylinder rear pull type hydraulic press oil cylinder supporting device according to claim 4, characterized in that: the side wall of the cylinder body (23) is uniformly provided with operation holes (32).
6. The double cylinder rear pull type hydraulic press oil cylinder supporting device according to claim 2, characterized in that: the wheel type fixed seat (20) is composed of an annular convex body (28) and an L-shaped annular connecting body (29) connected to the circumference of the annular convex body (28).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910825350.4A CN110541406B (en) | 2019-09-02 | 2019-09-02 | Oil cylinder supporting device of double-cylinder back-pulling hydraulic machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910825350.4A CN110541406B (en) | 2019-09-02 | 2019-09-02 | Oil cylinder supporting device of double-cylinder back-pulling hydraulic machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110541406A true CN110541406A (en) | 2019-12-06 |
| CN110541406B CN110541406B (en) | 2024-03-26 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910825350.4A Active CN110541406B (en) | 2019-09-02 | 2019-09-02 | Oil cylinder supporting device of double-cylinder back-pulling hydraulic machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110541406B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6058666A (en) * | 1997-08-31 | 2000-05-09 | Lin; Wei-Hwang | Twin-axis prestressed single-tee beam with lower flange and process of construction |
| CN106120667A (en) * | 2016-08-25 | 2016-11-16 | 中国电建集团贵阳勘测设计研究院有限公司 | The method for embedding of a kind of twin-tub suspended hydraulic Oil cylinder supporting seat and structure |
| CN109371926A (en) * | 2018-12-10 | 2019-02-22 | 中国电建集团贵阳勘测设计研究院有限公司 | A kind of rear pull type hydraulic press branch free bearing structure |
| CN209307972U (en) * | 2018-12-10 | 2019-08-27 | 中国电建集团贵阳勘测设计研究院有限公司 | A kind of rear pull type hydraulic press branch free bearing structure |
| CN211340705U (en) * | 2019-09-02 | 2020-08-25 | 中国电建集团贵阳勘测设计研究院有限公司 | Oil cylinder supporting mechanism of double-cylinder rear-pull type hydraulic press |
-
2019
- 2019-09-02 CN CN201910825350.4A patent/CN110541406B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6058666A (en) * | 1997-08-31 | 2000-05-09 | Lin; Wei-Hwang | Twin-axis prestressed single-tee beam with lower flange and process of construction |
| CN106120667A (en) * | 2016-08-25 | 2016-11-16 | 中国电建集团贵阳勘测设计研究院有限公司 | The method for embedding of a kind of twin-tub suspended hydraulic Oil cylinder supporting seat and structure |
| CN109371926A (en) * | 2018-12-10 | 2019-02-22 | 中国电建集团贵阳勘测设计研究院有限公司 | A kind of rear pull type hydraulic press branch free bearing structure |
| CN209307972U (en) * | 2018-12-10 | 2019-08-27 | 中国电建集团贵阳勘测设计研究院有限公司 | A kind of rear pull type hydraulic press branch free bearing structure |
| CN211340705U (en) * | 2019-09-02 | 2020-08-25 | 中国电建集团贵阳勘测设计研究院有限公司 | Oil cylinder supporting mechanism of double-cylinder rear-pull type hydraulic press |
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| Publication number | Publication date |
|---|---|
| CN110541406B (en) | 2024-03-26 |
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