CN109296381B - Belt mud scraper of shield machine - Google Patents
Belt mud scraper of shield machine Download PDFInfo
- Publication number
- CN109296381B CN109296381B CN201811252418.6A CN201811252418A CN109296381B CN 109296381 B CN109296381 B CN 109296381B CN 201811252418 A CN201811252418 A CN 201811252418A CN 109296381 B CN109296381 B CN 109296381B
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- 238000007790 scraping Methods 0.000 claims abstract description 74
- 230000001360 synchronised effect Effects 0.000 claims description 28
- 230000005641 tunneling Effects 0.000 claims description 24
- 230000000694 effects Effects 0.000 abstract description 18
- 239000003921 oil Substances 0.000 description 83
- 238000010276 construction Methods 0.000 description 14
- 230000003028 elevating effect Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 239000004927 clay Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000010720 hydraulic oil Substances 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 239000002893 slag Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000010727 cylinder oil Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/12—Devices for removing or hauling away excavated material or spoil; Working or loading platforms
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/12—Devices for removing or hauling away excavated material or spoil; Working or loading platforms
- E21D9/13—Devices for removing or hauling away excavated material or spoil; Working or loading platforms using hydraulic or pneumatic conveying means
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention provides a shield machine belt mud scraper, which belongs to the technical field of shield machines and comprises a fixed seat, wherein the fixed seat is arranged on a belt fixing frame of a shield machine, and a cavity with an upward opening is arranged in the fixed seat; a mud scraping plate inserted in the cavity; the top of the lifting device is connected with the scraper, the bottom of the lifting device is arranged on the belt fixing frame or the fixing seat and is used for driving the scraper to move up and down, and the lifting device is electrically connected with the control system; be provided with the stopper that is used for preventing taking place the skew about the scraper when reciprocating on the lateral wall of scraper, be provided with on the lateral wall of fixing base and be used for holding the stopper and supply stopper gliding slip constant head tank from top to bottom, the stopper passes slip constant head tank and extends outside the fixing base. The invention provides a shield machine belt mud scraper, which aims to solve the technical problems that the existing mud scraping plate has poor mud scraping effect and the distance between the mud scraping plate and a belt cannot be adjusted.
Description
Technical Field
The invention belongs to the technical field of shield machinery, and particularly relates to a shield machine belt mud scraper.
Background
In the process of pushing the earth pressure balance shield machine, the muck is conveyed to a muck truck stopped on a track through a belt conveyor. In the process of conveying the dregs, the dregs are easy to adhere to the belt, the dregs are seriously splashed and drop along with the operation of the belt, a large amount of dregs are accumulated at the joint of the trailer, the construction safety can be influenced when the dregs drop down, the construction of workers is also influenced, the sanitation condition of a tunnel is worsened, various equipment, especially electric elements, can be greatly damaged, and the service life is reduced. The cleaning of dregs is relatively troublesome, influences the construction progress, and can waste a large amount of woven bags, improves construction cost etc.
In the tunneling process of some stratum components mainly including clay silt, fine sand and the like, the phenomenon of binding the belt by the slag soil is unavoidable, and in this case, a scraper is required to clean the belt. The belt mud scraping plate which is commonly adopted on the earth pressure balance shield machine is a lower layer belt inner side triangular mud scraping plate at a driven wheel and a nylon mud scraping plate with a driving wheel, and cannot achieve a good mud scraping effect, so that the phenomenon of mud sticking on the outer layer of the lower layer belt is serious, slag soil is caused to fall seriously in a tunnel, a belt roller is bonded seriously, a thicker mud film is formed, larger friction resistance is generated in the belt rotating process, the torque of a belt driving motor is increased, overload of the belt motor is easily caused, overload alarm of a frequency converter is caused, a circuit breaker trips frequently, and unnecessary electrical faults are caused. In addition, the scraper is generally connected with the shield machine through bolts, and the distance between the scraper and the belt can not be adjusted after the scraper is installed, so that the shield machine is inconvenient to use.
Disclosure of Invention
The invention aims to provide a belt mud scraper of a shield machine, and aims to solve the technical problems that the existing mud scraper is poor in mud scraping effect and the distance between the mud scraper and a belt cannot be adjusted.
In order to achieve the above purpose, the invention adopts the following technical scheme: the utility model provides a shield constructs quick-witted belt mud scraper, include: the fixed seat is arranged on a belt fixing frame of the shield machine, and a cavity with an upward opening is arranged in the fixed seat;
a mud scraping plate inserted in the cavity;
the top of the lifting device is connected with the scraper, the bottom of the lifting device is arranged on the belt fixing frame or the fixing seat and used for driving the scraper to move up and down, and the lifting device is electrically connected with the control system.
Further, be provided with on the lateral wall of the scraper and be used for preventing the scraper takes place the stopper of horizontal migration when reciprocating, be provided with on the lateral wall of fixing base and be used for holding the stopper and confession the stopper gliding slip constant head tank from top to bottom, the stopper passes the slip constant head tank and extend outside the fixing base.
Further, the lifting device is connected with the scraper through a mounting seat arranged on the scraper.
Further, the fixing base comprises a main body and mounting plates symmetrically arranged on two sides of the main body, the mounting plates are fixedly connected with the belt fixing frame, the main body is a U-shaped groove with an upward opening, the U-shaped groove is the cavity, and the lifting device is arranged on the mounting plates.
Further, the stopper be with the bolt of mud scraping plate threaded connection, elevating gear is the pneumatic cylinder, the pneumatic cylinder is two, and set up respectively the both ends of mud scraping plate, the pneumatic cylinder top with mud scraping plate is connected, and the bottom sets up the belt mount or on the fixing base, just the pneumatic cylinder with control system electricity is connected.
Further, the control system comprises a main oil supply pipeline and a synchronous oil circuit which are mutually communicated, one end of the main oil supply pipeline is communicated with the oil tank through a pressure reducing valve, the other end of the main oil supply pipeline is communicated with one end of the synchronous oil circuit through a hydraulic control one-way valve, the synchronous oil circuit is respectively communicated with rodless cavities of two hydraulic cylinders, rod cavities of two hydraulic cylinders are respectively communicated with the oil tank through three-position four-way electromagnetic reversing valves, and the three-position four-way electromagnetic reversing valves are electrically connected with an electric control system.
Further, the synchronous oil circuit comprises a first branch and a second branch which are respectively communicated with rodless cavities of the two hydraulic cylinders, and the first branch and the second branch are respectively communicated with the hydraulic control one-way valve through a synchronous valve.
Further, the main oil supply pipeline comprises a first oil supply pipeline, a second oil supply pipeline and a third oil supply pipeline which are mutually connected in parallel, the first oil supply pipeline is provided with a cartridge valve, an oil inlet of the cartridge valve is communicated with the oil tank through the pressure reducing valve, an oil outlet of the cartridge valve is communicated with an oil inlet of the hydraulic control one-way valve, and a control port of the cartridge valve is communicated with the synchronous valve; the second oil supply pipeline is provided with a manual hydraulic control valve, an oil inlet of the manual hydraulic control valve is communicated with the oil tank through the pressure reducing valve, and an oil outlet of the manual hydraulic control valve is communicated with an oil inlet of the hydraulic control one-way valve through a one-way valve; the third oil supply pipeline is an oil supply pipeline which is sequentially connected with the pressure reducing valve, the three-position four-way electromagnetic reversing valve and the hydraulic control one-way valve in series.
Further, the electric control system comprises a first switch, a first relay, a second switch and a second relay, wherein a coil of the first relay, a first electromagnet of the three-position four-way electromagnetic reversing valve, a normally open contact of the first relay and the first switch are sequentially connected in series to form a first power supply loop for controlling the conduction or closing of a first valve body of the three-position four-way electromagnetic reversing valve, a coil of the second relay, a second electromagnet of the three-position four-way electromagnetic reversing valve, a normally open contact of the second relay and the second switch are sequentially connected in series to form a second power supply loop for controlling the conduction or closing of a second valve body of the three-position four-way electromagnetic reversing valve, and the first power supply loop and the second power supply loop are further respectively electrically connected with a power supply through micro-breaking switches.
Further, the first power supply loop and the second power supply loop are also electrically connected with the micro-disconnection through emergency stop switches respectively.
The shield tunneling machine belt mud scraper provided by the invention has the beneficial effects that: compared with the prior art, the shield machine belt mud scraper improves the mud scraping device of the upper belt and the lower belt of the existing shield machine, and is arranged in a mode of combining a fixing seat, a mud scraping plate and a lifting device. The lifting device is arranged to realize adjustability of the distance between the scraper and the lower belt of the shield tunneling machine, so that a control system or a user can quickly and indirectly adjust the gap between the scraper and the lower belt according to specific conditions after the top of the scraper is worn, and the mud scraping effect of the shield tunneling machine belt mud scraper is ensured to be always in a good state and excellent in stability. The lifting device is arranged in two, so that the stability of stress at two ends of the mud scraping plate is ensured, and meanwhile, the mud scraping effect consistency of different areas of the lower belt is ensured. The setting of fixing base makes the mud scraping plate can not take place back and forth swing or can only swing in very little interval (namely in the width scope of cavity) when using, has effectively avoided down the phenomenon emergence that mud scraping plate takes place to offset by a wide margin influence mud scraping effect when the belt slime is more thereupon, and then has ensured the good mud scraping effect of mud scraping plate, has reduced the risk that elevating gear takes place to damage simultaneously in the use.
Through experiments, the shield machine belt mud scraper provided by the invention has the advantages that the belt is basically not dropped with dregs in the pushing process of the shield machine, the belt is not damaged, the construction efficiency is improved, the construction safety of personnel is ensured, the failure rate of some equipment is greatly reduced, and the construction can be smoothly carried out. In summary, by the shield machine belt mud scraper provided by the invention, belt dregs under the shield machine can be effectively eliminated, normal construction of constructors is ensured, a tunnel is clean, all parts on the shield machine are not damaged, and construction efficiency is improved. The equipment is particularly suitable for clay silt, silt and fine sand strata, and has a large popularization space.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments or the description of the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic structural view of a belt scraper of a shield tunneling machine according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a front view structure of a shield tunneling machine belt scraper after being installed according to an embodiment of the present invention;
FIG. 3 is a schematic side view of a shield tunneling machine belt scraper according to an embodiment of the present invention after installation;
fig. 4 is a schematic diagram of a hydraulic principle of a control system of a belt scraper of a shield tunneling machine according to an embodiment of the present invention;
fig. 5 is a schematic circuit diagram of an electronic control system according to an embodiment of the present invention.
In the figure: 1. a fixing seat; 11. a main body; 12. a mounting plate; 2. a control system; 21. a main oil supply line; 211. a first oil supply line; 212. a second oil supply line; 213. a third oil supply line; 22. synchronous oil paths; 221. a first branch; 222. a second branch; 223. a synchronizing valve; 23. a hydraulically controlled one-way valve; 24. three-position four-way electromagnetic reversing valve; 25. an oil tank; 26. a cartridge valve; 27. a manual pilot operated valve; 28. a one-way valve; 29. a pressure reducing valve; 3. a cavity; 4. a mud scraping plate; 5. an electric control system; 51. a first power supply loop; 52. a second power supply loop; 6. a limiting block; 7. sliding positioning groove; 8. a lifting device; 9. a mounting base; 10. a belt fixing frame; 13. and a lower belt.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Referring to fig. 1 to 3, a belt scraper for a shield tunneling machine according to an embodiment of the present invention will be described. The shield machine belt mud scraper comprises a fixed seat 1, wherein the fixed seat 1 is arranged on a belt fixing frame 10 of a shield machine, and a cavity 3 with an upward opening is arranged in the fixed seat 1; a scraper 4 inserted into the cavity 3; the top of the lifting device 8 is connected with the mud scraping plate 4, the bottom of the lifting device is arranged on the belt fixing frame 10 or the fixing seat 1 and used for driving the mud scraping plate 4 to move up and down, and the lifting device 8 is electrically connected with the control system 2.
When the shield machine is used, the fixing seat 1 is installed on the belt fixing frame 10, the mud scraping plate 4 is inserted into the cavity 3 of the fixing seat 1, the lifting device 8 is fixed on the belt fixing frame 10 or the fixing seat 1, after the position is installed, the height of the lifting device 8 is controlled through the control system 2, the top of the mud scraping plate 4 is abutted against the lower belt 13 of the shield machine, then the belt rotates along with the abutting, and the mud scraping plate 4 scrapes mud on the lower belt 13. When the top of the scraper 4 is worn, the height of the lifting device 8 is further adjusted so that the scraper 4 again abuts against the lower belt 13. When the scraper 4 needs to be replaced, the height of the lifting device 8 is reduced, and the scraper 4 is detached for replacement.
Compared with the prior art, the shield machine belt mud scraper improves the mud scraping device of the upper and lower belts 13 of the existing shield machine, and is arranged in a mode of combining the fixing seat 1, the mud scraping plate 4 and the lifting device 8. The lifting device 8 is arranged to realize the adjustability of the distance between the mud scraping plate 4 and the lower belt 13 of the shield tunneling machine, so that the control system 2 or a user can quickly adjust the gap between the mud scraping plate 4 and the lower belt 13 according to specific conditions after the top of the mud scraping plate 4 is worn, and the mud scraping effect of the belt mud scraper of the shield tunneling machine is ensured to be always in a good state and excellent in stability. The setting of fixing base 1 makes the mud scraping plate 4 can not take place back and forth swing or can only swing in very little interval (i.e. in the width scope of cavity 3) when using, has effectively avoided down belt 13 slime to take place the phenomenon that the mud scraping plate 4 takes place to offset by a wide margin influence mud scraping effect thereupon when more, and then has ensured the good mud scraping effect of mud scraping plate 4, has reduced the risk that elevating gear 8 takes place to damage simultaneously in the use.
Through field tests, the shield machine belt mud scraper provided by the invention has the advantages that the belt is basically not dropped with dregs in the pushing process of the shield machine, the belt is not damaged, the construction efficiency is improved, the construction safety of personnel is ensured, the failure rate of some equipment is greatly reduced, and the construction can be smoothly carried out. In summary, by the shield machine belt mud scraper provided by the invention, belt dregs under the shield machine can be effectively eliminated, normal construction of constructors is ensured, a tunnel is clean, all parts on the shield machine are not damaged, and construction efficiency is improved. The equipment is particularly suitable for clay silt, silt and fine sand strata, and has a large popularization space.
The lifting device 8 in this embodiment may be a lifting device that is available in the market such as a hydraulic cylinder, an electric cylinder, and a pneumatic cylinder, and can be automatically controlled to lift by the control system 2.
As a specific embodiment of the shield tunneling machine belt mud scraper provided by the invention, referring to fig. 1 and 2, a limit block 6 for preventing the mud scraper 4 from shifting left and right when moving up and down is arranged on the side wall of the mud scraper 4, a sliding positioning groove 7 for accommodating the limit block 6 and allowing the limit block 6 to slide up and down is arranged on the side wall of the fixed seat 1, and the limit block 6 passes through the sliding positioning groove 7 and extends out of the fixed seat 1.
The setting of stopper 6 and slip constant head tank 7 makes the mud scraping plate 4 not take place left and right deviation when reciprocating under elevating gear 8's drive, and then has ensured that the area of contact of mud scraping plate 4 and lower belt 13 is fixed unchangeable, has ensured the stability of mud scraping plate 4 mud scraping effect, has ensured elevating gear 8 atress's stability simultaneously, has guaranteed its longer life.
As a specific embodiment of the belt scraper for a shield tunneling machine provided by the present invention, referring to fig. 1 to 3, the lifting device 8 is connected to the scraper 4 through a mounting seat 9 provided on the scraper 4.
The setting of mount pad 9 makes elevating gear 8 and scraper 4 can be connected steadily, and can not receive the restriction of scraper 4 own width, installs more convenient and fast.
In this embodiment, the mounting seat 9 is detachably connected with the mud scraper 4 and the lifting device 8 respectively, so that the convenience of operation when the mud scraper 4 or the lifting device 8 is mounted or replaced is effectively improved. In this embodiment, the length of the scraper 4 is greater than the length of the fixing base 1, and the mounting base 9 is disposed outside the fixing base 1.
As a specific embodiment of the shield tunneling machine belt mud scraper provided by the invention, referring to fig. 1 to 3, a fixing seat 1 comprises a main body 11 and mounting plates 12 symmetrically arranged on two sides of the main body 11, wherein the mounting plates 12 are fixedly connected with a belt fixing frame 10, the main body 11 is a U-shaped groove with an upward opening, the U-shaped groove is a cavity 3, and a lifting device 8 is arranged on the mounting plates 12. Lifting device 8 installs on fixing base 1, and the producer of being convenient for assembles equipment and carries out whole sales or transport at the mill, and this arrangement has effectively improved the convenience of equipment transportation and transport, has reduced spare part simultaneously and has left the risk of being responsible.
In this embodiment, the mounting plate 12 is detachably and fixedly connected to the belt fixing frame 10 by bolts.
As a specific embodiment of the shield tunneling machine belt mud scraper provided by the invention, referring to fig. 1 to 3, the limiting block 6 is a bolt in threaded connection with the mud scraper 4, the lifting device 8 is two hydraulic cylinders, the two hydraulic cylinders are respectively arranged at two ends of the mud scraper 4, the top of the hydraulic cylinder is connected with the mud scraper 4, the bottom of the hydraulic cylinder is arranged on the belt fixing frame 10 or the fixing seat 1, and the hydraulic cylinder is electrically connected with the control system 2.
The stopper 6 adopts the bolt, has realized the stopper 6 and has scraped the detachable connection of mud board 4, and the user of being convenient for takes out or adorns mud board 4 from fixing base 1 as required. Meanwhile, the limiting block 6 adopts bolts, and the versatility of the limiting block 6 is further improved. When the equipment is normally used, the bolts can be used as a limiting block 6 which can move up and down along with the mud scraping plate 4 without being screwed; when lifting device 8 breaks down and needs to be changed, can screw up the bolt for the mud scraping plate 4 is fixed on fixing base 1, and the bolt can be used as the mounting of mud scraping plate 4 and fixing base 1 at this moment, and this arrangement has effectively increased lifting device 8 installation and during the dismantlement convenience and the security of operation.
The lifting device 8 adopts a hydraulic cylinder, the materials are convenient to obtain, the jacking force to the mud scraping plate 4 is large enough, and the better mud scraping effect of the mud scraping plate 4 can be ensured. The two lifting devices 8 ensure the stability of stress at the two ends of the mud scraping plate 4, and ensure the consistency of mud scraping effects of different areas of the lower belt 13.
As a specific implementation manner of the shield tunneling machine belt mud scraper provided by the invention, referring to fig. 4, a control system 2 comprises a main oil supply pipeline 21 and a synchronous oil circuit 22 which are mutually communicated, one end of the main oil supply pipeline 21 is communicated with an oil tank 25 through a pressure reducing valve 29, the other end of the main oil supply pipeline 21 is communicated with one end of the synchronous oil circuit 22 through a hydraulic control one-way valve 23, the synchronous oil circuit 22 is respectively communicated with rodless cavities of two hydraulic cylinders, the rod cavities of the two hydraulic cylinders are respectively communicated with the oil tank 25 through a three-position four-way electromagnetic reversing valve 24, and the three-position four-way electromagnetic reversing valve 24 is electrically connected with an electric control system 5.
When the mud scraping plate 4 needs to be lifted, the electronic control system 5 controls the right side of the three-position four-way electromagnetic directional valve 24 to be conducted, the main oil supply pipeline 21 is conducted, hydraulic oil in the oil tank 25 is supplied to the synchronous oil path 22 through the hydraulic control one-way valve 23, the synchronous oil path 22 divides the oil path and then synchronously supplies oil to rodless cavities of two hydraulic cylinders, the two hydraulic cylinders are controlled to synchronously lift, and the hydraulic oil in the rod cavities in the hydraulic cylinders flows back to the oil tank 25 through the three-position four-way electromagnetic directional valve 24. When the mud scraper 4 works, the electric control system 5 controls the middle position of the three-position four-way electromagnetic directional valve 24 to work, so that an oil way of the hydraulic system is blocked, and the height of the hydraulic cylinder is kept stable. When the mud scraping plate 4 needs to be replaced, the electric control system 5 controls the left side of the three-position four-way electromagnetic directional valve 24 to be conducted, the system starts to supply oil to the rod cavity of the hydraulic cylinder, and hydraulic oil in the rod-free cavity of the hydraulic cylinder flows back into the oil tank 25 through the hydraulic control one-way valve 23 and the three-position four-way electromagnetic directional valve 24 in sequence.
As a specific embodiment of the belt mud scraper of the shield tunneling machine provided by the invention, referring to fig. 4, the synchronous oil path 22 includes a first branch 221 and a second branch 222 which are respectively communicated with rodless cavities of two hydraulic cylinders, and the first branch 221 and the second branch 222 are respectively communicated with the hydraulic control check valve 23 through a synchronous valve 223. According to the invention, the synchronous control of the two hydraulic cylinders is realized through the arrangement of the synchronous oil way 22, and the consistency of stress at the two ends of the mud scraping plate 4 is ensured.
The synchronous valve 223 in this embodiment may be a two-way synchronous valve or a throttle valve existing in the market, so long as the hydraulic flow rates and the flow rates of the first branch 221 and the second branch 222 are consistent.
As a specific implementation manner of the shield tunneling machine belt mud scraper provided by the invention, referring to fig. 4, a main oil supply pipeline 21 comprises a first oil supply pipeline 211, a second oil supply pipeline 212 and a third oil supply pipeline 213 which are mutually connected in parallel, a cartridge valve 26 is arranged on the first oil supply pipeline 211, an oil inlet of the cartridge valve 26 is communicated with an oil tank 25 through a pressure reducing valve 29, an oil outlet of the cartridge valve 26 is communicated with an oil inlet of a hydraulic control one-way valve 23, and a control port of the cartridge valve 26 is communicated with a synchronous valve 223; the second oil supply pipeline 212 is provided with a manual hydraulic control valve 27, an oil inlet of the manual hydraulic control valve 27 is communicated with the oil tank 25 through a pressure reducing valve 29, and an oil outlet of the manual hydraulic control valve 27 is communicated with an oil inlet of the hydraulic control one-way valve 23 through a one-way valve 28; the third oil supply pipeline 213 is an oil supply pipeline which is sequentially connected in series with the pressure reducing valve 29, the three-position four-way electromagnetic directional valve 24 and the hydraulic control one-way valve 23.
As a specific implementation manner of the shield tunneling machine belt mud scraper provided by the invention, referring to fig. 5, the electric control system 5 comprises a first switch, a first relay, a second switch and a second relay, wherein a coil of the first relay, a first electromagnet of the three-position four-way electromagnetic directional valve 24, a normally open contact of the first relay and the first switch are sequentially connected in series to form a first power supply loop 51 for controlling the first valve body of the three-position four-way electromagnetic directional valve 24 to be conducted or closed, a coil of the second relay, a second electromagnet of the three-position four-way electromagnetic directional valve 24, a normally open contact of the second relay and the second switch are sequentially connected in series to form a second power supply loop 52 for controlling the second valve body of the three-position four-way electromagnetic directional valve 24 to be conducted or closed, and the first power supply loop 51 and the second power supply loop 52 are further respectively electrically connected with a power supply through micro-breaking switches.
In the present invention, three oil supply lines (i.e., a first oil supply line 211, a second oil supply line 212, and a third oil supply line 213) connected in parallel are provided, and these three oil supply lines represent three hydraulic cylinder control modes, respectively: automatic control, manual control and electrohydraulic control modes. The working principle of the three control modes is as follows:
1. automatic control mode
After the installation of each part in the shield machine belt mud scraper is finished, in order to realize automatic control, firstly, the tension of the belt in the shield machine is adjusted to achieve an ideal slag discharging effect; next, the pressure of the cylinder rodless chamber is determined according to the good mud scraping effect formed by the mud scraping plate 4 and the lower belt 13, thereby determining the pressure difference between the pressure reducing valve 29 and the cartridge valve 26. When the mud scraping plate 4 is worn, a certain gap is formed between the mud scraping plate and the lower belt 13, the cartridge valve 26 detects that the pressure of the rodless cavity of the hydraulic cylinder is reduced, at the moment, oil enters the rodless cavity of the two hydraulic cylinders after passing through the pressure reducing valve 29 to open the cartridge valve 26, an oil path flows to the position of the hydraulic control one-way valve 23 and is shunted by the synchronous valve 223 until the oil pressure of the rodless cavity reaches a set standard, and at the moment, the cartridge valve 26 is closed, so that automatic control is realized. This setting makes control system 2 can realize the automated inspection of pneumatic cylinder pressure, and whether the automatic detection of wearing and tearing take place for mud scraping plate 4 promptly to after mud scraping plate 4 wearing and tearing, automatic control elevating gear 8 (pneumatic cylinder) drive mud scraping plate 4 rise, thereby realized shield machine belt mud scraper and the automatic detection and the adjustment of interval down between belt 13, improved the holistic degree of automation of equipment, improved work efficiency, guaranteed the good steady mud scraping effect of equipment.
2. Manual control mode
The oil path leading from the auxiliary hydraulic system flows through the pressure reducing valve 29 to reach the manual hydraulic control valve 27, the manual hydraulic control valve 27 is pressed down, the oil path is communicated up and down, and the oil path passes through the one-way valve 28, the hydraulic control one-way valve 23 and the synchronous valve 223 and then reaches the rodless cavity of the hydraulic cylinder, so that the hydraulic cylinder drives the mud scraping plate 4 and the upper limiting block 6 thereof to vertically ascend along the sliding positioning groove 7 until a good mud scraping effect is achieved.
3. Electrohydraulic control mode
The 24V power supply voltage is introduced, the micro-break switch F1 is switched on, the emergency stop switch S1 is in a normal state, the button of the first switch SB1 is pressed, the coil of the first relay K1 is powered on, the normally open contact of the first relay K1 is closed, the first electromagnet Y1 of the three-position four-way electromagnetic reversing valve 24 is powered on, the first valve body (namely the right valve body) is conducted, oil enters the rodless cavity of the hydraulic cylinder after passing through the three-position four-way electromagnetic reversing valve 24, the hydraulic control one-way valve 23 and the synchronous valve 223, and the hydraulic cylinder drives the mud scraping plate 4 and the upper limiting block 6 thereof to vertically rise along the sliding positioning groove 7 until a good mud scraping effect is achieved. When the scraper 4 needs to be replaced, a second switch (namely a descending button) is pressed down, a coil of the second relay K2 is powered on, a normally open contact of the second relay K2 is closed, a second electromagnet Y2 of the three-position four-way electromagnetic reversing valve 24 is powered on, a second valve body (namely a left valve body) is conducted, an oil path flows to a rod cavity of the hydraulic cylinder, simultaneously reaches the hydraulic control one-way valve 23, and the hydraulic control one-way valve 23 is opened, so that an oil return oil path is formed by a rodless cavity of the hydraulic control one-way valve, flows to the oil tank 25, and the hydraulic cylinder drives the hydraulic cylinder
The mud scraping plate 4 descends, and the mud scraping plate 4 with the same specification is replaced.
Wherein, micro-switch can adopt C65N 1P C6A type Schneider miniature circuit breaker, and first switch and second switch can adopt ZB4-BW333 type button switch, and first relay and second relay can adopt 34.7024.0010 type Finder 24V relay.
As a specific embodiment of the shield tunneling machine belt mud scraper provided by the present invention, referring to fig. 5, the first power supply loop 51 and the second power supply loop 52 are also electrically connected to the micro-break through a scram switch, respectively.
The arrangement of the emergency stop switch is convenient for stopping the operation immediately after the equipment fails, and prevents damage or loss expansion. The emergency stop switch can be ZB4-BS844 type push-button switch.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (5)
1. The shield constructs quick-witted belt mud scraper, its characterized in that includes:
the fixed seat (1) is arranged on a belt fixing frame (10) of the shield machine, and a cavity (3) with an upward opening is arranged in the fixed seat (1);
a mud scraping plate (4) inserted into the cavity (3);
the top of the lifting device (8) is connected with the mud scraping plate (4), the bottom of the lifting device is arranged on the belt fixing frame (10) or the fixing seat (1) and is used for driving the mud scraping plate (4) to move up and down, and the lifting device (8) is electrically connected with the control system (2);
a limiting block (6) used for preventing the left-right offset of the scraper (4) when the scraper (4) moves up and down is arranged on the side wall of the fixed seat (1), a sliding positioning groove (7) used for accommodating the limiting block (6) and allowing the limiting block (6) to slide up and down is arranged on the side wall of the fixed seat (1), and the limiting block (6) penetrates through the sliding positioning groove (7) and extends out of the fixed seat (1);
the lifting device (8) is a hydraulic cylinder, the number of the hydraulic cylinders is two, the two hydraulic cylinders are respectively arranged at two ends of the mud scraping plate (4), the top of each hydraulic cylinder is connected with the mud scraping plate (4), the bottom of each hydraulic cylinder is arranged on the belt fixing frame (10) or the fixing base (1), and the hydraulic cylinders are electrically connected with the control system (2);
the control system (2) comprises a main oil supply pipeline (21) and a synchronous oil circuit (22) which are mutually communicated, one end of the main oil supply pipeline (21) is communicated with an oil tank (25) through a pressure reducing valve (29), the other end of the main oil supply pipeline (21) is communicated with one end of the synchronous oil circuit (22) through a hydraulic control one-way valve (23), the synchronous oil circuit (22) is respectively communicated with rodless cavities of two hydraulic cylinders, rod cavities of the two hydraulic cylinders are respectively communicated with the oil tank (25) through three-position four-way electromagnetic reversing valves (24), and the three-position four-way electromagnetic reversing valves (24) are electrically connected with the electric control system (5);
the synchronous oil circuit (22) comprises a first branch circuit (221) and a second branch circuit (222) which are respectively communicated with rodless cavities of the two hydraulic cylinders, and the first branch circuit (221) and the second branch circuit (222) are respectively communicated with the hydraulic control one-way valve (23) through a synchronous valve (223);
the main oil supply pipeline (21) comprises a first oil supply pipeline (211), a second oil supply pipeline (212) and a third oil supply pipeline (213) which are mutually connected in parallel, a cartridge valve (26) is arranged on the first oil supply pipeline (211), an oil inlet of the cartridge valve (26) is communicated with the oil tank (25) through the pressure reducing valve (29), an oil outlet of the cartridge valve (26) is communicated with an oil inlet of the hydraulic control one-way valve (23), and a control port of the cartridge valve (26) is communicated with the synchronous valve (223); the second oil supply pipeline (212) is provided with a manual hydraulic control valve (27), an oil inlet of the manual hydraulic control valve (27) is communicated with the oil tank (25) through the pressure reducing valve (29), and an oil outlet of the manual hydraulic control valve (27) is communicated with an oil inlet of the hydraulic control one-way valve (23) through a one-way valve (28); the third oil supply pipeline (213) is an oil supply pipeline which is sequentially connected with the pressure reducing valve (29), the three-position four-way electromagnetic reversing valve (24) and the hydraulic control one-way valve (23) in series.
2. The shield tunneling machine belt scraper of claim 1 wherein: the lifting device (8) is connected with the scraper (4) through a mounting seat (9) arranged on the scraper (4).
3. The shield tunneling machine belt scraper of claim 2 wherein: the fixing seat (1) comprises a main body (11) and mounting plates (12) symmetrically arranged on two sides of the main body (11), wherein the mounting plates (12) are fixedly connected with the belt fixing frame (10), the main body (11) is a U-shaped groove with an upward opening, the U-shaped groove is the cavity (3), and the lifting device (8) is arranged on the mounting plates (12).
4. The shield tunneling machine belt scraper of claim 1 wherein: the electric control system (5) comprises a first switch, a first relay, a second switch and a second relay, a coil of the first relay, a first electromagnet of the three-position four-way electromagnetic reversing valve (24), a normally open contact of the first relay and the first switch are sequentially connected in series to form a first power supply loop (51) for controlling the conduction or closing of a first valve body of the three-position four-way electromagnetic reversing valve (24), a coil of the second relay, a second electromagnet of the three-position four-way electromagnetic reversing valve (24), a normally open contact of the second relay and the second switch are sequentially connected in series to form a second power supply loop (52) for controlling the conduction or closing of a second valve body of the three-position four-way electromagnetic reversing valve (24), and the first power supply loop (51) and the second power supply loop (52) are further respectively electrically connected with a power supply through micro-breaking switches.
5. The shield tunneling machine belt scraper of claim 4 wherein: the first power supply loop (51) and the second power supply loop (52) are also electrically connected with the micro-disconnection through emergency stop switches respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811252418.6A CN109296381B (en) | 2018-10-25 | 2018-10-25 | Belt mud scraper of shield machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811252418.6A CN109296381B (en) | 2018-10-25 | 2018-10-25 | Belt mud scraper of shield machine |
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| Publication Number | Publication Date |
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| CN109296381A CN109296381A (en) | 2019-02-01 |
| CN109296381B true CN109296381B (en) | 2023-09-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811252418.6A Active CN109296381B (en) | 2018-10-25 | 2018-10-25 | Belt mud scraper of shield machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109779926B (en) * | 2019-03-14 | 2023-11-07 | 中铁六局集团有限公司 | Control circuit of automatic water pumping device and automatic water pumping device |
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