CN111044377A - Loading oil cylinder test device capable of moving up and down in reaction well and test method - Google Patents
Loading oil cylinder test device capable of moving up and down in reaction well and test method Download PDFInfo
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- CN111044377A CN111044377A CN201911090189.7A CN201911090189A CN111044377A CN 111044377 A CN111044377 A CN 111044377A CN 201911090189 A CN201911090189 A CN 201911090189A CN 111044377 A CN111044377 A CN 111044377A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0048—Hydraulic means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/026—Specifications of the specimen
- G01N2203/0262—Shape of the specimen
- G01N2203/0278—Thin specimens
- G01N2203/0282—Two dimensional, e.g. tapes, webs, sheets, strips, disks or membranes
Abstract
The invention relates to a loading oil cylinder test device capable of moving up and down in a reaction well, which comprises a hydraulic loading system and matched auxiliary equipment; the hydraulic loading system comprises a T-shaped groove, a T-shaped plate, a sliding arm, a loading oil cylinder, a fixed hinge plate, a movable hinge plate, a distribution beam and a connecting plate; the T-shaped plate is provided with a T-shaped groove and is connected with the counter-force well through a third bolt hole; the T-shaped plate is connected with the loading oil cylinder through a connecting plate, T-shaped screw holes are formed in four corners of the connecting plate, and the T-shaped screw holes are connected with T-shaped bolts in the T-shaped grooves in a matched mode; the loading oil cylinder is provided with a sliding arm capable of moving transversely, the front end of the loading oil cylinder is connected with a fixed hinge plate, the front end of the fixed hinge plate is connected with a movable hinge plate, and the front end of the movable hinge plate is connected with a distribution beam; the auxiliary equipment comprises a displacement sensor, a load sensor and an oil cylinder hanging beam. The invention has the beneficial effects that: this device has set up T type groove and T template, can realize loading device's reciprocating through dismouting T type bolt, simple structure.
Description
Technical Field
The invention belongs to the technical field of hydraulic control, and relates to a loading oil cylinder test device and a test method, in particular to a loading oil cylinder test device capable of moving up and down in a reaction well and a test method.
Background
With the increasing development of urban infrastructure and the further development of underground space, underground transportation becomes an indispensable public transportation component of many cities, so that the research on the structural safety and mechanical properties of subway shield tunnels has great significance.
Therefore, at home and abroad, related researches are mainly carried out by adopting methods such as a reduced-size model test and a full-size model test, however, in the reduced-size model test, the reliability of the test is influenced by a reduced-size effect, the limitation of the performance of a model material is influenced, and a certain difference often exists between an experimental result and an actual situation. And the field test in the aspect of bearing capacity cannot be carried out in the operation subway tunnel. Therefore, more and more scholars choose to simulate real conditions using full-scale testing. For the foot size test, the structural performance of the loading device and the loading mode directly influence the test result. In order to better simulate the flexible soil and water pressure on the tunnel segment under the real condition, the counter force device usually applies pressure on the segment through the loading head, but cannot directly act on the segment through the rigid contact of the loading oil cylinder or the jack. The point of action of a typical arcuate loading head must be in the middle of the tube sheet. At present, segments with various sizes are widely used, such as Hanshao SG-4 standard shield segments, Jinhua-Yiwu-Dongyang urban area rail traffic engineering, Jinhua station-Shuangxi west road station region, Ningbo city rail traffic No. 1 line first-stage engineering TJ-II standard Zernian station-drum building station region, and Beijing subway No. 12 line 02 standard Changchun bridge station-people university station region, wherein the ring width is 1.2 m; the tunnel shield concrete segment for Qingdao subway No. 8 line, the tunnel shield segment for Western-style subway No. 6-5, the tunnel shield segment for Western-style subway No. 9-7, the tunnel segment for Guangzhou No. 8-2, and the ring width from Hangzhou to Lingan intercity railway engineering high and new garden district station to high and green region all reach 1.5 m. However, the loading oil cylinder of the traditional device is fixed, and the traditional device cannot adapt to pipe pieces with different ring widths.
In summary, the existing loading cylinder has insufficient functions, and in order to solve the above problems, an improved technology is needed.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a loading oil cylinder testing device capable of moving up and down in a reaction well and a testing method.
The loading oil cylinder test device capable of moving up and down in the reaction well comprises a hydraulic loading system and matched auxiliary equipment; the hydraulic loading system comprises a T-shaped groove, a T-shaped plate, a sliding arm, a loading oil cylinder, a fixed hinge plate, a movable hinge plate, a distribution beam and a connecting plate; the T-shaped plate is provided with a T-shaped groove and is connected with the counter-force well through a third bolt hole; the T-shaped plate is connected with the loading oil cylinder through a connecting plate, T-shaped screw holes are formed in four corners of the connecting plate, and the T-shaped screw holes are connected with T-shaped bolts in the T-shaped grooves in a matched mode; the loading oil cylinder is provided with a sliding arm capable of moving transversely, the front end of the loading oil cylinder is connected with a fixed hinge plate, the front end of the fixed hinge plate is connected with a movable hinge plate, and the front end of the movable hinge plate is connected with a distribution beam; the auxiliary equipment comprises a displacement sensor, a load sensor, an oil cylinder hanging beam, a hanging beam pulley and a chain block.
Preferably, the method comprises the following steps: the cross section of the T-shaped plate is T-shaped and adopts an integral cast steel structure.
Preferably, the method comprises the following steps: and third bolt holes are formed in two sides of the T-shaped plate.
Preferably, the method comprises the following steps: the T-shaped groove and the connecting plate are fixedly connected through a T-shaped bolt and a nut, and the T-shaped groove is matched with a T-shaped screw hole in the connecting plate.
Preferably, the method comprises the following steps: the middle part of the connecting plate is provided with a circle of first bolt holes, and the connecting plate is connected with a loading oil cylinder through the first bolt holes.
Preferably, the method comprises the following steps: and a circle of second bolt holes are formed in the joint of the fixed hinge plate and the movable hinge plate and are connected through high-strength bolts.
Preferably, the method comprises the following steps: the movable hinge plate is a detachable universal bearing spherical hinge structure.
Preferably, the method comprises the following steps: the oil cylinder hanging beam is fixed on the counter-force wall through a bolt, and the hanging beam pulley is fixed on a guide rail at the lower part of the oil cylinder hanging beam; the lower end of the hanging beam pulley and the upper end and the lower end of the loading oil cylinder are both provided with hollow circular ring structures, and the hollow circular ring structures can be connected with hooks at the upper end and the lower end of the chain block; the chain block mainly comprises a chain, a chain wheel and a hook.
The test method of the loading oil cylinder test device capable of moving up and down in the reaction well comprises the following steps:
1) duct piece entering and assembling: before the test is started, firstly, hoisting the duct piece required by the test into a reaction well and installing the duct piece;
2) installing a test instrument: fixing a required sensor on the duct piece, connecting a lead with a modulator and connecting the lead with a console main control computer;
3) the adjusting device comprises: adjusting the position of the loading oil cylinder according to the size of the segment; firstly loosening the T-shaped bolt, moving the loading oil cylinder up and down to adjust the position of the loading oil cylinder, and then fixing the T-shaped bolt and the nut so as to fix the position of the loading oil cylinder; sequentially adjusting the loading oil cylinders to be adjusted;
4) acquiring data: the main control computer receives the sensing parameter from the modulator and outputs the required data automatically in the form of chart table and the like;
5) and (3) disassembling a duct piece instrument: and (4) recovering the position of the loading oil cylinder, disconnecting the lead, taking down the sensor on the segment, dismounting the segment and hoisting out.
The invention has the beneficial effects that:
1) the device has simple structure and convenient operation;
compare in traditional loading device, this device has set up T type groove and T template, can realize reciprocating of loading device through dismouting T type bolt, simple structure to can effectually compensate the shortcoming of traditional device. The device is also provided with a set of oil cylinder in-situ calibration device which can be used for calibrating the oil cylinder and the sensor, and the calibration device can slide up and down along the T-shaped plate and is used for calibrating different oil cylinders.
2) The device is stable and reliable and is safe to use;
compare in traditional loading device, this device can satisfy the requirement of not unidimensional section of jurisdiction through reciprocating of loading cylinder, and traditional loading device can only satisfy the section of jurisdiction of single size, can only take methods such as cushion when facing not unidimensional section of jurisdiction, however methods such as cushion not only make experiment preparation loaded down with trivial details in earlier stage, still can cause the influence to the reliability of test data, more have the potential safety hazard. The mechanical structure performance of the device is stable, and the device is not only simple to operate, but also stable and safe.
3) The device has wide applicability and meets various test requirements;
compare in traditional loading device, this device has set up 54 loading hydro-cylinders, and each hydro-cylinder can all exert oneself alone for this device can form 54 ways of independent control, satisfies operating mode requirements such as eccentric loading uninstallation, logical seam staggered joint are assembled, and this is that traditional loading devices such as surrounding type and opposite-pulling can't satisfy.
Drawings
FIG. 1 is a schematic diagram of a loading cylinder test device capable of moving up and down in a reaction well;
FIG. 2 is a schematic diagram of the up-and-down movement of a loading cylinder;
FIG. 3 is a detailed structure diagram of the loading device;
FIG. 4 is a schematic view of a hoist boom;
fig. 5 is a schematic view of the chain block.
Description of reference numerals: the device comprises a T-shaped groove 1, a T-shaped plate 2, a sliding arm 3, a loading oil cylinder 4, a fixed hinge plate 5, a movable hinge plate 6, a distribution beam 7, a displacement sensor 8, a load sensor 9, a T-shaped screw hole 10, a first bolt hole 11, a second bolt hole 12, an oil cylinder hanging beam 13, a hanging beam pulley 14, a chain block 15, a chain 16, a chain wheel 17, a connecting plate 99 and a third bolt hole 98.
Detailed Description
The present invention will be further described with reference to the following examples. The following examples are set forth merely to aid in the understanding of the invention. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
As shown in fig. 1, the loading cylinder testing device capable of moving up and down in the reaction well comprises a hydraulic loading system and auxiliary equipment, wherein the hydraulic loading system comprises a T-shaped groove 1, a T-shaped plate 2, a sliding arm 3, a loading cylinder 4, a fixed hinged plate 5, a movable hinged plate 6, a distribution beam 7 and a connecting plate 99, and the auxiliary equipment comprises a displacement sensor 8, a load sensor 9, a cylinder hanging beam 13, a hanging beam pulley 14, a chain block 15, an auxiliary mounting bracket, a test piece vertical loading device, a servo motor, a servo oil source, a main control computer, an oil tank, an oil pipe, a cable, an oil pipe ditch, a water collecting ditch and the like. The main body reaction wall is poured by high-strength reinforced concrete, and 3 layers of 54 anchor plates are arranged on the periphery of the main body reaction wall and used for fixing a loading system. 18 loading oil cylinders 4 are uniformly fixed in a ring shape, and the centers of two adjacent loading oil cylinders are separated by 20 degrees. And set up the steel cat ladder on the main part counterforce wall, make things convenient for the discrepancy of experimenter and the field of advancing and retreating of some material part consumptions. The T-shaped plate 2 is of an integral cast steel structure, the cross section of the T-shaped plate is T-shaped, and the section structure is beneficial to force transmission and structural stability when being pressed. T type groove 1 is opened along vertical direction on the T template 2 for the height of adjustment and fixed T type bolt and nut, all carries out the machining and guarantees the roughness in periphery and the inslot. The sliding arm 3 can adapt to the horizontal movement of the loading oil cylinder 4, thereby adapting to duct pieces with different diameters and ensuring that the output force can be loaded on the duct pieces. The hinge plate at the front end of the loading oil cylinder 4 is of a detachable universal bearing spherical hinge structure, and can directly load a test piece or load the test piece through a distribution beam 7.
As shown in fig. 2, the heads of the four T-bolts are embedded in the T-shaped groove 1, and the stems of the T-bolts pass through the four T-bolt holes 10 on the connecting plate 99 and are fixed on the connecting plate 99 by nuts. The loading oil cylinder 4 can move up and down, the four T-shaped bolts on the connecting plate 99 are loosened, the connecting plate 99 and the loading oil cylinder 4 are not fixed at the moment and can slide up and down in the T-shaped groove 1, the four T-shaped bolts on the connecting plate 99 are fixed after the loading oil cylinder 4 moves to a required position, and the connecting plate 99 is fixed at the moment, so that the loading oil cylinder 4 can slide up and down. For example, at this time, the ring width of the segment corresponding to the position of the loading cylinder 4 is 1.2m, and when the ring width of the segment is adjusted to be suitable for 1.5m, the four T-shaped bolts on the connecting plate 99 are firstly loosened, the chain 16 on the chain block 15 is pulled, so that the chain block 15 drives the loading cylinder 4 and the connecting plate 99 to ascend by 15cm, the four T-shaped bolts on the connecting plate 99 are fixed, and at this time, the loading position of the loading cylinder 4 is suitable for the segment with the ring width of 1.5 m. The device meets the requirements of the pipe pieces with different ring width sizes.
As shown in FIG. 3, the middle of the connecting plate 99 is provided with a circle of first bolt holes 11, and the plurality of high-strength bolts can effectively disperse the stress in the vertical direction, thereby not only greatly enhancing the structural strength, but also effectively prolonging the structural life and facilitating the replacement of a small number of bolts in the later period. Four T-shaped screw holes 10 are formed in the connecting plate 99, two lower T-shaped bolts mainly bear pressure under the no-load condition, two upper T-shaped bolts mainly bear tension, the structure is effectively stable, meanwhile, the strength of the nut is high, the mounting and dismounting are convenient, the upper height and the lower height of the loading oil cylinder 4 can be conveniently and effectively adjusted, and the loading point is located in the center of the duct piece. A fixed hinge plate 5 and a movable hinge plate 6 are connected through a second bolt hole 12 by using a high-strength bolt, the fixed hinge plate 5 and the movable hinge plate 6 are matched for use, and when a loading roller at the front end is not in the vertical direction or has a certain angle, fine adjustment of angle deviation can be carried out in the same radial plane relative to a certain radial direction, so that the loading oil cylinder 4 is protected.
As shown in fig. 4, the oil cylinder hanging beam 13 is fixed on the reaction wall by bolts, the hanging beam pulley 14 is fixed on a guide rail under the oil cylinder hanging beam 13, and the position of the guide rail can be adjusted arbitrarily and fixed at any position. The lower end of the hanging beam pulley 14 and the upper end and the lower end of the loading oil cylinder 4 are both provided with hollow circular ring structures which can be connected with hooks at the upper end and the lower end of the chain block 15. The hanging beam pulley 14 is matched with the chain block 15 and used for hoisting the loading oil cylinder 4.
As shown in fig. 5, the chain 16 is provided at the left and right ends of the chain block 15, when the heavy object is lifted upwards, the chain 16 is pulled clockwise to rotate the chain wheel 17, when the heavy object is lifted downwards, the chain 16 is pulled counterclockwise, the brake seat is separated from the brake pad, the ratchet wheel is static under the action of the pawl, and the gear shaft drives the lifting chain wheel to move in the opposite direction, so that the heavy object is lifted stably.
The test method of the loading oil cylinder test device capable of moving up and down in the reaction well comprises the following steps:
1) duct piece entering and assembling: before the test is started, the pipe piece required by the test is firstly hoisted into the reaction well and installed.
2) Installing a test instrument: and fixing a required sensor on the duct piece, and connecting a wire with a modulator and a console main control computer.
3) The adjusting device comprises: and adjusting the position of the loading oil cylinder 4 according to the size of the segment. Firstly, the T-shaped bolt is loosened, the loading oil cylinder 4 is moved up and down to adjust the position, and then the T-shaped bolt and the nut are adjusted to fix the position of the loading oil cylinder 4. And adjusting all required loading oil cylinders in sequence.
4) Acquiring data: the main control computer receives the sensing parameter from the modulator and outputs the required data automatically in the form of chart table and the like.
5) And (3) disassembling a duct piece instrument: and (4) recovering the position of the loading oil cylinder, disconnecting the lead, taking down the sensor on the segment, dismounting the segment and hoisting out.
The device is also provided with a set of oil cylinder in-situ calibration device which can be used for calibrating the oil cylinder and the sensor, and the calibration device can slide up and down along the T-shaped plate 2 and is used for calibrating different oil cylinders.
Claims (9)
1. The utility model provides a loading hydro-cylinder test device that can reciprocate in reaction well which characterized in that: the hydraulic loading system comprises a hydraulic loading system and auxiliary equipment; the hydraulic loading system comprises a T-shaped groove (1), a T-shaped plate (2), a sliding arm (3), a loading oil cylinder (4), a fixed hinge plate (5), a movable hinge plate (6), a distribution beam (7) and a connecting plate (99); a T-shaped groove (1) is formed in the T-shaped plate (2), and the T-shaped plate (2) is connected with the reaction well through a third bolt hole (98); the T-shaped plate (2) is connected with the loading oil cylinder (4) through a connecting plate (99), T-shaped screw holes (10) are formed in four corners of the connecting plate (99), and the T-shaped screw holes (10) are connected with T-shaped bolts in the T-shaped grooves (1) in a matched mode; the loading oil cylinder (4) is provided with a sliding arm (3), the front end of the loading oil cylinder (4) is connected with a fixed hinged plate (5), the front end of the fixed hinged plate (5) is connected with a movable hinged plate (6), and the front end of the movable hinged plate (6) is connected with a distribution beam (7); the matched auxiliary equipment comprises a displacement sensor (8), a load sensor (9), an oil cylinder hanging beam (13), a hanging beam pulley (14) and a chain block (15).
2. The loading cylinder test device capable of moving up and down in the reaction well according to claim 1, characterized in that: the cross section of the T-shaped plate (2) is T-shaped.
3. The loading cylinder test device capable of moving up and down in the reaction well according to claim 1, characterized in that: and third bolt holes (98) are formed in two sides of the T-shaped plate (2).
4. The loading cylinder test device capable of moving up and down in the reaction well according to claim 1, characterized in that: the T-shaped groove (1) is fixedly connected with the connecting plate (99) through a T-shaped bolt and a nut, and the T-shaped groove (1) is matched with a T-shaped screw hole (10) on the connecting plate (99).
5. The loading cylinder test device capable of moving up and down in the reaction well according to claim 1, characterized in that: the middle part of the connecting plate (99) is provided with a circle of first bolt holes (11), and the connecting plate (99) is connected with the loading oil cylinder (4) through the first bolt holes (11).
6. The loading cylinder test device capable of moving up and down in the reaction well according to claim 1, characterized in that: the joint of the fixed hinged plate (5) and the movable hinged plate (6) is provided with a circle of second bolt holes (12) which are connected through high-strength bolts.
7. The loading cylinder test device capable of moving up and down in the reaction well according to claim 1, characterized in that: the movable hinge plate (6) is a detachable universal bearing spherical hinge structure.
8. The loading cylinder test device capable of moving up and down in the reaction well according to claim 1, characterized in that: the oil cylinder hanging beam (13) is fixed on the reaction wall through a bolt, and the hanging beam pulley (14) is fixed on a guide rail at the lower part of the oil cylinder hanging beam (13); the lower end of the hanging beam pulley (14) and the upper end and the lower end of the loading oil cylinder (4) are respectively provided with a hollow circular ring structure, and the hollow circular ring structures are connected with hooks at the upper end and the lower end of a chain block (15); the chain block (15) mainly comprises a chain (16), a chain wheel (17) and a hook.
9. A method for testing a loading cylinder test device which can move up and down in a reaction well according to claim 1, which is characterized in that: the method comprises the following steps:
1) duct piece entering and assembling: before the test is started, firstly, hoisting the duct piece required by the test into a reaction well and installing the duct piece;
2) installing a test instrument: fixing a sensor meter on the duct piece, connecting a lead with a modulator and connecting the modulator with a console main control computer;
3) the adjusting device comprises: adjusting the position of the loading oil cylinder (4) according to the size of the segment; firstly loosening the T-shaped bolt, moving the loading oil cylinder (4) up and down to adjust the position of the loading oil cylinder, and then fixing the T-shaped bolt and the nut so as to fix the position of the loading oil cylinder (4); sequentially adjusting the loading oil cylinders (4) to be adjusted;
4) acquiring data: the main control computer receives the sensing parameter from the modulator and outputs the required data automatically in the form of chart table and the like;
5) and (3) disassembling a duct piece instrument: and (4) recovering the position of the loading oil cylinder (4), disconnecting the lead, taking down the sensor on the segment, dismounting the segment and hoisting out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911090189.7A CN111044377A (en) | 2019-11-08 | 2019-11-08 | Loading oil cylinder test device capable of moving up and down in reaction well and test method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911090189.7A CN111044377A (en) | 2019-11-08 | 2019-11-08 | Loading oil cylinder test device capable of moving up and down in reaction well and test method |
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| CN111044377A true CN111044377A (en) | 2020-04-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911090189.7A Pending CN111044377A (en) | 2019-11-08 | 2019-11-08 | Loading oil cylinder test device capable of moving up and down in reaction well and test method |
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| CN101131342A (en) * | 2006-08-25 | 2008-02-27 | 同济大学 | Tunnel lining component high-temperature mechanical property testing system |
| CN102012338A (en) * | 2010-12-15 | 2011-04-13 | 山东大学 | Composite flexible uniform pressure loading device suitable for geomechanical model test |
| CN203118325U (en) * | 2012-12-29 | 2013-08-07 | 北京铁路电气化学校 | Elevator traction machine installation and maintenance practical training apparatus |
| CN103592116A (en) * | 2013-11-21 | 2014-02-19 | 中国建筑股份有限公司 | Loaded oil cylinder positioning system of shield segment testing machine |
| CN105651614A (en) * | 2016-01-25 | 2016-06-08 | 西南交通大学 | Experiment loading device for shield segment and straight beam |
| CN105938067A (en) * | 2016-04-12 | 2016-09-14 | 中国建筑股份有限公司 | External loading type shield segment mechanical property testing machine and testing method thereof |
| CN205786075U (en) * | 2016-06-13 | 2016-12-07 | 中国建筑股份有限公司 | The hydraulic power system of external load formula shield duct piece testing machine for mechanical properties |
| CN208270343U (en) * | 2018-05-04 | 2018-12-21 | 广东建准检测技术有限公司 | A kind of shield duct piece anti-bending strength detection device of adjustable load distribution |
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2019
- 2019-11-08 CN CN201911090189.7A patent/CN111044377A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101131342A (en) * | 2006-08-25 | 2008-02-27 | 同济大学 | Tunnel lining component high-temperature mechanical property testing system |
| CN102012338A (en) * | 2010-12-15 | 2011-04-13 | 山东大学 | Composite flexible uniform pressure loading device suitable for geomechanical model test |
| CN203118325U (en) * | 2012-12-29 | 2013-08-07 | 北京铁路电气化学校 | Elevator traction machine installation and maintenance practical training apparatus |
| CN103592116A (en) * | 2013-11-21 | 2014-02-19 | 中国建筑股份有限公司 | Loaded oil cylinder positioning system of shield segment testing machine |
| CN105651614A (en) * | 2016-01-25 | 2016-06-08 | 西南交通大学 | Experiment loading device for shield segment and straight beam |
| CN105938067A (en) * | 2016-04-12 | 2016-09-14 | 中国建筑股份有限公司 | External loading type shield segment mechanical property testing machine and testing method thereof |
| CN205786075U (en) * | 2016-06-13 | 2016-12-07 | 中国建筑股份有限公司 | The hydraulic power system of external load formula shield duct piece testing machine for mechanical properties |
| CN208270343U (en) * | 2018-05-04 | 2018-12-21 | 广东建准检测技术有限公司 | A kind of shield duct piece anti-bending strength detection device of adjustable load distribution |
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