CN107448430B - All-hydraulic tunnel drilling machine multi-way reversing valve - Google Patents
All-hydraulic tunnel drilling machine multi-way reversing valve Download PDFInfo
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- CN107448430B CN107448430B CN201710852615.0A CN201710852615A CN107448430B CN 107448430 B CN107448430 B CN 107448430B CN 201710852615 A CN201710852615 A CN 201710852615A CN 107448430 B CN107448430 B CN 107448430B
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- 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
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
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- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
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Abstract
The invention discloses a multi-way reversing valve of a full-hydraulic tunnel drilling machine, which comprises a rotary valve plate, a switching valve plate, a feeding valve plate and a tail plate valve plate which are sequentially connected; the rotary valve plate is used for connecting a forward oil inlet and a reverse oil inlet of a rotary motor of the tunnel drilling machine; the feeding valve plate and the tail plate valve plate are used for controlling the extension and retraction of the feeding oil cylinder; the switching valve plate comprises a three-position five-way valve and a three-position six-way valve, wherein the three-position five-way valve is a hydraulic control reversing valve and is used for respectively connecting a main pump and an auxiliary pump of the tunnel drilling machine, an oil inlet of the hydraulic chuck, and a clamping oil port and a loosening oil port of the clamp holder; when the three-position six-way valve is in the upper position, the three-position five-way valve is in the upper position when the rotary motor is reversed, so that the clamp holder is opened to realize automatic screwing of the drill rod; and when the three-position six-way valve is in the lower position, the three-position six-way valve is used for opening the hydraulic control one-way valve to enable the feed oil cylinder to float so as to release the drill rod. The beneficial effects are that: compact structure, few pipeline connection, difficult leakage, low power loss and high system efficiency.
Description
Technical Field
The invention relates to a multi-way reversing valve, in particular to a multi-way reversing valve of a full-hydraulic tunnel drilling machine.
Background
The tunnel drilling machine is a drilling machine for drilling in an underground tunnel, and is mainly used for engineering construction such as deep geological exploration, gas drainage, water injection and drainage, ventilation and the like in the tunnel. The main structure is as follows: the power head provided with the hydraulic chuck is connected with the propulsion cylinder, the clamp holder consists of two semicircular slips, one slip is fixed, the other slip can move, and the two slips are pressed together under the action of the disc spring. The working mode is as follows: the multi-way valve rotates the reversing of the handle, the power head rotates, so that the hydraulic chuck clamps the drill rod to rotate, meanwhile, the two slips of the clamp holder are opened, the drill rod is loosened, the pushing handle pushes forwards to reverse, and the power head advances under the action of the pushing oil cylinder to drill; after a drill rod is driven in, the pushing handle returns to the middle position, the power head stops advancing, the rotating handle returns to the middle position, the power head stops rotating, the chuck is opened, and meanwhile, the two slips of the clamp holder clamp the driven drill rod, so that the falling is prevented. And a drill rod is additionally arranged at the tail part of the drill rod, the pushing handle is pulled back for reversing, the power head is retreated to the tail part, and the drill rod is continuously additionally arranged for circularly drilling. The clamping and opening of the chuck and the clamping and opening of the clamp are controlled by a control valve group.
The prior drilling multi-way valve mainly has two defects: firstly, the drilling valve and the control valve group are two valves, which are connected through a plurality of pipelines, occupy a large space and are easy to generate leakage points; secondly, when the drilling is stopped, the drill rod is clamped by the two slips tightly pressed by the disc spring of the clamp holder, and when the drill rod is too much, the pressing force of the disc spring is insufficient, so that the drill rod can slide down.
Disclosure of Invention
The invention aims to solve the technical problem of providing the multi-way reversing valve of the full-hydraulic tunnel drilling machine, which has the advantages of compact structure, less pipeline connection, difficult leakage, small power loss and high system efficiency.
The technical scheme of the invention is as follows:
a multi-way reversing valve of a full-hydraulic tunnel drilling machine comprises a rotary valve plate, a switching valve plate, a feeding valve plate and a tail plate valve plate which are connected in sequence; the rotary valve plate is used for connecting a forward oil inlet and a reverse oil inlet of a rotary motor of the tunnel drilling machine; the feeding valve plate and the tail plate valve plate are used for controlling the extension and retraction of the feeding oil cylinder;
the switching valve plate comprises a three-position five-way valve and a three-position six-way valve, the three-position five-way valve is a hydraulic control reversing valve and comprises an oil inlet P2, working oil ports A3, A4 and B4, an internal oil return port T1, an internal oil inlet C2 and internal control oil ports K1, K2 and K5 for controlling the action of a valve rod of the valve plate, and the internal oil inlet C2 is communicated with the oil inlet P1 and the oil inlet P2 of the rotary valve plate through one-way valve respectively and is used for being connected with a main pump and a secondary pump of the tunnel drilling machine respectively; the working oil port A3 is used for connecting an oil inlet of a hydraulic chuck of the tunnel drilling machine, and the working oil ports A4 and B4 are respectively used for connecting a clamping oil port and a loosening oil port of a clamp holder of the tunnel drilling machine;
when the three-position five-way valve is in the middle position, the internal oil inlet C2 is communicated with the working oil ports A3 and A4, and the working oil port B4 is communicated with the internal oil return port T1, so as to realize tripping of a drill rod during tripping; when the three-position five-way valve is in an upper position, the internal oil inlet C2 is communicated with the working oil ports A3 and B4, and the working oil port A4 is communicated with the internal oil return port T1, so that clamping of the hydraulic chuck and loosening of the clamp holder during tripping are realized; when the three-position five-way valve is in the lower position, the internal oil inlet C2 is communicated with the working oil port A4, and the working oil ports A3 and B4 are communicated with the internal oil return port T1 so as to enable the hydraulic chuck to be loosened and the clamp holder to be clamped;
the three-position six-way valve comprises working oil ports A1 ', B1', A2 'and B2', and control oil ports K3 and K4, wherein the working oil port A1 'is communicated with a working oil port A1 arranged on the rotary valve plate through the internal control oil port K1 and an internal oil passage, the working oil port B1' is communicated with a working oil port B1 arranged on the rotary valve plate sequentially through the internal control oil port K2, a one-way valve I and an internal oil passage, the working oil port A2 'is communicated with an oil inlet of a hydraulic control one-way valve arranged on a tailboard valve plate, and the working oil port B2' is communicated with an oil outlet B2 arranged on the feed valve plate; the control oil port K3 is communicated with a control oil port of the hydraulic control one-way valve, and the control oil port K4 is communicated with the internal control oil port K5;
when the three-position six-way valve is in an upper position, the control oil port K4 is communicated with the working oil port B2 ', the working oil ports A1' and B1 'are communicated, the control oil port K3 and the working oil port A2' are cut off, and the three-position five-way valve is in an upper position when the rotary motor is reversed, so that the clamp holder is opened to realize automatic rotary connection of the drill rod; when the three-position six-way valve is in the lower position, the control oil port K4 is communicated with the working oil port A2 ', the control oil port K3 is communicated with the working oil port B1', and the working oil ports A1 'and B2' are cut off; for opening the pilot operated check valve to float the feed cylinder for tripping the drill pipe.
As a further preferable mode, when the three-position six-way valve is in the middle position, the control oil port K4 is communicated with the working oil port B2 ', the control oil port K3 is communicated with the working oil port B1', and the working oil ports A1 'and A2' are cut off.
As a further preferable aspect, the rotary valve plate includes a four-position five-way valve, and the four-position five-way valve includes an oil inlet P1, working oil ports A1 and B1, an oil return port T, and an internal working oil port C1; the oil inlet P1 is used for connecting a main pump of the tunnel drilling machine, and the working oil ports A1 and B1 are respectively used for connecting a forward oil inlet and a reverse oil inlet of a rotary motor of the tunnel drilling machine.
As a further preferable mode, when the four-position five-way valve is in the middle position, the oil inlet P1 is communicated with the working oil ports A1 and B1 and the internal working oil port C1, and the oil return port T is cut off; when the four-position five-way valve is in the first upper position, the oil inlet P1 is communicated with the working oil port A1, the working oil port B1 is communicated with the internal working oil port C1, and the oil return port T is cut off; when the four-position five-way valve is in the second upper position, the oil inlet P1 is communicated with the working oil port A1, the working oil port B1 is communicated with the oil return port T, and the internal working oil port C1 is cut off; when the four-position five-way valve is in the lower position, the oil inlet P1 is communicated with the working oil port B1, the working oil port A1 is communicated with the internal working oil port C1, and the oil return port T is cut off.
As a further preferred aspect, the feeding valve plate includes a three-position four-way valve, the three-position four-way valve includes an oil inlet P2 ', working oil ports A2' and B2, and an oil return port T, the oil inlet P2 'is respectively communicated with the oil inlet P2 and the internal working oil port C1 through internal oil passages, the working oil port A2' is respectively communicated with the working oil port A2 'and an oil inlet of a pilot operated check valve provided on the tail plate valve plate through internal oil passages, and the working oil port B2 is communicated with the working oil port B2' through internal oil passages for connecting a rodless cavity of a feeding cylinder of the tunnel drilling machine.
Preferably, the tail plate valve plate comprises a tail plate valve body and the hydraulic control one-way valve arranged on the valve body, and the tail plate valve body is provided with a working oil port A2 for connecting a rod cavity of a feed oil cylinder of the tunnel drilling machine.
As a further preferable mode, a sequence valve is arranged between the oil inlet P2 and the oil inlet P2', and is used for providing oil with certain pressure for an inner oil inlet C2 of the three-position five-way valve, so that certain oil pressure is ensured to be always provided in a clamping oil cavity of the tunnel drilling machine clamp holder to clamp a drill rod, and the drill rod is prevented from sliding down.
As a further preference, a main relief valve is provided on the rotary valve plate between the oil inlet P1 and the oil return T, for preventing the system from being damaged by too high oil pressure entering the interior of the system.
As a further preferable aspect, the four-position five-way valve is a manual reversing valve.
As a further preferable aspect, the three-position six-way valve is a manual reversing valve.
As a further preferred aspect, the three-position four-way valve is a manual reversing valve.
The beneficial effects of the invention are as follows:
1. the working state of the three-position five-way valve in the switching valve plate can be automatically controlled through the forward and reverse rotation of the rotary valve plate control motor and the three-position six-way valve, so that the clamping and loosening of the hydraulic chuck and the clamp holder can be automatically controlled according to the forward and reverse rotation of the hydraulic motor, the structure is compact, the pipeline connection is less, the leakage is difficult, the power loss is small, and the system efficiency is high.
2. The operation handles are few, and only three operation handles can be operated, so that centralized control is easy to realize, and the reliability of a host can be improved.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic structural diagram of the present invention.
Fig. 3 is a schematic structural diagram of the switch valve plate in fig. 1.
Fig. 4 is a cross-sectional view A-A of fig. 3.
In the figure: the valve comprises a rotary valve plate 1, a switching valve plate 2, a feeding valve plate 3, a tail plate valve plate 4, a main overflow valve 5, a four-position five-way valve 6, a check valve I7, a rotary motor 8, a hydraulic chuck 9, a clamp holder 10, a feeding cylinder 11, an unloading valve 12, a hydraulic control check valve 13, a sequence valve 14, a three-position four-way valve 15, a check valve III 16, a three-position six-way valve 17, a three-position five-way valve 18, a check valve II 19, an adjusting rod 20, a return spring 21, a valve cover 22, a switching valve body 23, a hydraulic control valve rod 24, a sealing plug 25, an annular oil cavity I26, a pressing plate 27, a limiting column 28, an annular oil cavity II 29, an oil return channel 30 and an oil way 31.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1 and 2, the multi-way reversing valve of the full-hydraulic tunnel drilling machine comprises a rotary valve plate 1, a switching valve plate 2, a feeding valve plate 3 and a tail plate valve plate 4 which are sequentially connected through bolts; the rotary valve plate 1 is used for connecting a forward oil inlet and a reverse oil inlet of a rotary motor 8 of the tunnel drilling machine so as to control the forward rotation and the reverse rotation of the rotary motor 8; the switching valve block 2 is used for controlling clamping and loosening of the hydraulic chuck 9 and the clamp holder 10 of the tunnel drilling machine during drilling and tripping, and the feeding valve block 3 and the tail plate valve block 4 are used for controlling extension and contraction of the feeding oil cylinder 11.
The rotary valve plate 1 comprises a four-position five-way valve 6 arranged on the rotary valve body and comprises an oil inlet P1, working oil ports A1 and B1, an oil return port T and an internal working oil port C1. The oil inlet P1 is led out from the surface of the rotary valve body and is used for connecting a main pump of the tunnel drilling machine; the working oil ports A1 and B1 are led out from the surface of the rotary valve body and are respectively used for connecting with a forward oil inlet and a reverse oil inlet of a rotary motor 8 of the tunnel drilling machine. When the four-position five-way valve 6 is in the middle position, the oil inlet P1 is communicated with the working oil ports A1 and B1 and the internal working oil port C1, and the oil return port T is cut off; when the four-position five-way valve 6 is in the first upper position, the oil inlet P1 is communicated with the working oil port A1, the working oil port B1 is communicated with the internal working oil port C1, and the oil return port T is cut off; when the four-position five-way valve 6 is in the second upper position, the oil inlet P1 is communicated with the working oil port A1, the working oil port B1 is communicated with the oil return port T, and the internal working oil port C1 is cut off; when the four-position five-way valve 6 is in the lower position, the oil inlet P1 is communicated with the working oil port B1, the working oil port A1 is communicated with the internal working oil port C1, and the oil return port T is cut off. A main overflow valve 5 is connected between the oil inlet P1 and the oil return port T on the rotary valve body and is used for preventing the system from being damaged due to the too high oil pressure entering the system.
The switching valve plate 2 comprises a three-position five-way valve 18 and a three-position six-way valve 17 which are arranged on a switching valve body 23, the three-position five-way valve 18 is a hydraulic control reversing valve and comprises a hydraulic control valve rod 24 arranged in the switching valve body 23, an oil inlet P2, working oil ports A3, A4 and B4, an internal oil return port T1, an internal oil inlet C2 and internal control oil ports K1, K2 and K5 for controlling the action of the valve rod are arranged on the switching valve body 23. As shown in fig. 3 and 4, a limit post 28 is mounted at one end of the pilot operated valve rod 24 in the switching valve body 23 through sliding clearance fit, and the outer end of the limit post 28 is limited in a sealing manner through a pressing plate 27 fixed on the switching valve body 23. The outer end of the limiting column 28 is provided with a positioning shaft shoulder, an annular oil cavity I26 is formed between the positioning shaft shoulder and the step of the inner hole of the switching valve body 23, annular gaps communicated with the annular oil cavity I26 are respectively formed between the outer edge of the positioning shaft shoulder and the inner hole of the switching valve body 23 and between the outer end of the positioning shaft shoulder and the pressing plate 27, and the inner control oil port K2 is communicated with the annular oil cavity I26 and used for guiding oil to push the hydraulic control valve rod 24 to enable the three-position five-way valve 18 to move to the middle position so as to release during drilling. An annular groove is formed in the front of the limiting column 28, an annular oil cavity II 29 is formed between the annular groove and the inner hole of the switching valve body 23, the internal control oil port K1 is communicated with the annular oil cavity II 29, a central hole is formed in the inner end of the limiting column 28, the central hole is communicated with the annular oil cavity II 29 through a radial hole, and oil is used for being led in to push the hydraulic control valve rod 24 to move to the left end so that the three-position five-way valve 18 is in upper conduction. One end of a central hole on the hydraulic control valve rod 24, which corresponds to the limit column 28, is connected with a sealing plug 25, an oil return passage 30 is arranged on the hydraulic control valve rod 24, and the oil return passage 30 is formed by a central hole on the hydraulic control valve rod 24 and radial holes respectively arranged at two ends of the central hole and is used for conducting the working oil port A4 and the internal oil return port T1 when the three-position five-way valve 18 is in an upper position. The other end of the hydraulic control valve rod 24 penetrates out of the switching valve body 23, a valve cover 22 is fixed on the switching valve body 23 corresponding to the other end of the hydraulic control valve rod 24, an adjusting rod 20 is connected in the valve cover 22 through threads, the inner end of the adjusting rod 20 is clamped in a central hole of the hydraulic control valve rod 24, and a reset spring 21 is sleeved on the adjusting rod 20 and positioned in the valve cover 22 and used for resetting the hydraulic control valve rod 24. The switching valve body 23 and the valve housing 22 are provided with an oil passage 31 for communicating the internal control port K5 with the inner cavity of the valve housing 22.
The internal oil inlet C2 is communicated with the oil inlet P1 of the rotary valve plate 1 and the oil inlet P2 through a one-way valve II 19, a one-way valve III 16 and an internal oil duct arranged in the valve body respectively and is used for connecting a main pump and a secondary pump of the tunnel drilling machine respectively. The working oil port A3 is led out from the surface of the switching valve body 23 and is used for connecting with an oil inlet of the hydraulic chuck 9 of the tunnel drilling machine; the working oil ports A4 and B4 are respectively led out from the surface of the switching valve body 23 and are used for respectively connecting the clamping oil port and the loosening oil port of the tunnel drilling machine clamp holder 10. The oil return port T is connected with the switching valve body through an internal oil duct, and the internal oil return port T1 is connected with the rotary valve body through an internal oil duct.
When the three-position five-way valve 18 is in the middle position, the internal oil inlet C2 is communicated with the working oil ports A3 and A4, the working oil port B4 is communicated with the internal oil return port T1, and the oil with higher pressure in the main pump and the auxiliary pump sequentially passes through the corresponding one-way valve II 19 or one-way valve III 16, the internal oil inlet C2 and the working oil ports A3 and A4 to respectively enter the oil inlet of the hydraulic chuck 9 and the clamping oil port of the clamp holder 10, so as to realize the tripping of a drill rod during the tripping. When the three-position five-way valve 18 is in an upper position, the internal oil inlet C2 is communicated with the working oil ports A3 and B4, the working oil port A4 is communicated with the internal oil return port T1, and oil with higher pressure in the main pump and the auxiliary pump sequentially passes through the corresponding one-way valve II 19 or one-way valve III 16, the internal oil inlet C2 and the working oil ports A3 and B4 respectively enter the oil inlet of the hydraulic chuck 9 and the loosening oil port of the clamp holder 10, so that clamping of the hydraulic chuck 9 and loosening of the clamp holder 10 are realized. When the three-position five-way valve 18 is in the lower position, the internal oil inlet C2 is communicated with the working oil port A4, the working oil ports A3 and B4 are communicated with the internal oil return port T1, and the oil with higher pressure in the main pump and the auxiliary pump enters the clamping oil port of the clamp 10 through the corresponding one-way valve ii 19 or iii 16 and the internal oil inlet C2 and the working oil port A4, so that the hydraulic chuck 9 is loosened and the clamp 10 is clamped.
The three-position six-way valve 17 comprises working oil ports A1 ', B1', A2 'and B2', and control oil ports K3 and K4, wherein the working oil port A1 'is communicated with the working oil port A1 arranged on the rotary valve plate 1 through the internal control oil port K1 and an internal oil duct, the working oil port B1' is communicated with the working oil port B1 arranged on the rotary valve plate 1 through the internal control oil port K2, a one-way valve I7 and an internal oil duct in sequence, the working oil port A2 'is communicated with an oil inlet of a hydraulic control one-way valve 13 arranged on the tail plate valve plate 4, and the working oil port B2' is communicated with an oil outlet B2 arranged on the feed valve plate 3; the control oil port K3 is communicated with the control oil port of the hydraulic control one-way valve 13, and the control oil port K4 is communicated with the internal control oil port K5.
When the three-position six-way valve 17 is in an upper position, the control oil port K4 is communicated with the working oil port B2 ', the working oil ports A1 ' and B1 ' are communicated, the control oil port K3 and the working oil port A2 ' are cut off, the internal control oil port K5 returns oil and auxiliary oil inlet are reset through the control oil port K4 and the working oil port B2 ', and the internal control oil port K2 is communicated with the internal control oil port K1 through the working oil ports B1 ' and A1 ' in sequence, so that the three-position five-way valve 18 is in an upper position when the rotary motor 8 is reversed, and the clamp 10 is opened to realize automatic rotary connection of a drill rod. When the three-position six-way valve 17 is in the lower position, the control oil port K4 is communicated with the working oil port A2 ', the control oil port K3 is communicated with the working oil port B1', and the working oil ports A1 'and B2' are cut off; the internal control oil port K5 is communicated with the working oil port A2' sequentially through the control oil port K4 and is used for realizing oil return and auxiliary oil inlet reset of the three-position five-way valve 18 during the tripping; the working oil port B1' is communicated with the control oil port K3 and is used for opening the hydraulic control one-way valve 13 to float the feed oil cylinder 11 so as to release the drill rod. When the three-position six-way valve 17 is in the middle position, the control oil port K4 is communicated with the working oil port B2 ', the control oil port K3 is communicated with the working oil port B1', and the working oil ports A1 'and A2' are cut off.
The feeding valve plate 3 comprises a three-position four-way valve 15, and comprises an oil inlet P2 ', working oil ports A2', B2 and an oil return port T, wherein the oil inlet P2 'is respectively communicated with the oil inlet P2 and the internal working oil port C1 through internal oil channels, the working oil port A2' is respectively communicated with the working oil port A2 'and an oil inlet of a hydraulic control one-way valve 13 arranged on the tail plate valve plate 4 through internal oil channels, and the working oil port B2 is communicated with the working oil port B2' through internal oil channels and is used for connecting a rodless cavity of the feeding oil cylinder 11 of the tunnel drilling machine. When the three-position four-way valve 15 is in the middle position, the oil inlet P2 ', the working oil ports A2', B2 and the oil return port T are all communicated with each other; when the three-position four-way valve 15 is in an upper position, the oil inlet P2 'is communicated with the working oil port A2', and the working oil port B2 is communicated with the oil return port T; when the three-position four-way valve 15 is in the lower position, the oil inlet P2 'is communicated with the working oil port B2, and the working oil port A2' is communicated with the oil return port T.
The tail plate valve block 4 comprises a tail plate valve body and the hydraulic control one-way valve 13 arranged on the valve body, and a working oil port A2 is arranged on the tail plate valve body and used for being connected with a rod cavity of the tunnel drilling machine feeding oil cylinder 11. The working oil port A2 is communicated with one end of an oil outlet of the hydraulic control one-way valve 13 through an internal oil passage, an unloading valve 12 is arranged between one end of the oil outlet of the hydraulic control one-way valve 13 and an oil return port T on the tailboard valve body, and a control oil port of the unloading valve 12 is communicated with the working oil port B2 through an internal oil passage.
A sequence valve 14 is connected between the oil inlet P2 and the oil inlet P2', and the sequence valve 14 is mounted on the switching valve body and is used for providing oil with a certain pressure for an inner oil inlet C2 of the three-position five-way valve 18, so that a certain oil pressure is always provided in a clamping oil cavity of the gallery drilling machine clamp 10 to clamp a drill rod, and the drill rod is prevented from sliding down.
The four-position five-way valve 6, the three-position four-way valve 15 and the three-position six-way valve 17 are all manual reversing valves.
When the hydraulic motor stops rotating, the rotary valve plate 1 and the feeding valve plate 3 are both in the middle position, the feeding oil cylinder 11 stops moving, the oil output by the auxiliary pump enters the three-position five-way valve 18 through the internal oil inlet C2, so that the three-position five-way valve 18 is in the lower position, and the internal oil inlet C2 is communicated with the working oil port A4 at the moment, so that the entering oil is guided into the clamping disc spring in the auxiliary clamp 10 in the clamping oil cavity of the clamp 10, the clamp 10 clamps the drill rod strongly, and the drill rod can be effectively prevented from sliding down.
When a drill rod needs to be driven in, the three-position six-way valve 17 is manually switched to the upper position, then the rotary valve plate 1 is controlled to be in the second upper position, so that the hydraulic motor rotates positively, and meanwhile oil discharged from the working oil port A1 enters the three-position five-way valve 18 through the internal control oil port K1 to push the valve rod to move downwards, so that the three-position five-way valve 18 is in the upper position; at this time, the oil with higher pressure in the main pump and the auxiliary pump sequentially enters the oil inlet of the hydraulic chuck 9 and the release oil port of the clamp holder 10 through the internal oil inlet C2 and the working oil ports A3 and B4 respectively, so that the hydraulic chuck 9 clamps the drill rod, the clamp holder 10 releases the drill rod, and the drill rod is driven by the hydraulic chuck 9 and the hydraulic motor to rotate clockwise; the feeding valve plate 3 is manually controlled to be in an upper position, at the moment, oil output by the auxiliary pump sequentially enters the feeding valve plate 3 through the sequence valve 14 and the oil inlet P2 ', and then enters a rod cavity of the feeding oil cylinder 11 through the working oil port A2' and the hydraulic control one-way valve 13, so that the feeding oil cylinder 11 drives a rotary drill rod to advance;
when the feed cylinder 11 advances to the maximum stroke, the feed valve plate 3 returns to the neutral position, the feed cylinder 11 stops advancing, and the rotary motor 8 returns to the neutral position, and the hydraulic motor stops rotating. At this time, the pressure of the internal control oil port K1 is released, the three-position five-way valve 18 automatically resets and is in a lower position under the action of a reset spring, so that the clamp holder 10 is clamped, the hydraulic chuck 9 is loosened, and then the feed valve plate 3 is controlled to be in a lower position, so that the feed oil cylinder 11 drives the chuck to retreat; when the feeding cylinder 11 retreats to the maximum stroke, the drilling process is repeated, so that the drill rod can be sequentially driven in.
When the drill is started, the three-position six-way valve 17 is manually switched to the lower position, then the rotary valve plate 1 is controlled to be in the second upper position, so that the hydraulic motor rotates positively, and meanwhile, oil discharged from the working oil port A1 enters the three-position five-way valve 18 through the internal control oil port K1 to push the valve rod to move downwards, so that the three-position five-way valve 18 is in the upper position; at this time, the oil with higher pressure in the main pump and the auxiliary pump sequentially enters the oil inlet of the hydraulic chuck 9 and the release oil port of the clamp holder 10 through the internal oil inlet C2 and the working oil ports A3 and B4 respectively, so that the hydraulic chuck 9 clamps the drill rod, the clamp holder 10 releases the drill rod, and the drill rod is driven by the hydraulic chuck 9 and the hydraulic motor to rotate clockwise; the feeding valve plate 3 is manually controlled to be in a lower position, and at the moment, oil output by the auxiliary pump sequentially enters the feeding valve plate 3 through the sequence valve 14 and the oil inlet P2', and then enters the rodless cavity of the feeding oil cylinder 11 through the working oil port B2, so that the feeding oil cylinder 11 drives a rotary drill rod to retreat.
When the feed cylinder 11 retreats to the maximum stroke, the feed valve plate 3 returns to the neutral position, the feed cylinder 11 stops retreating, and the rotary motor 8 returns to the neutral position, and the hydraulic motor stops rotating. At the moment, the pressure of the internal control oil port K1 is released, the three-position five-way valve 18 is automatically reset and is in a lower position under the action of a reset spring, so that the clamp holder 10 is clamped, and the hydraulic chuck 9 is loosened; then the rotary valve plate 1 is controlled to the lower position, so that the hydraulic motor rotates anticlockwise, oil output by the working oil port B1 enters the control oil port K2 and the working oil port B1' simultaneously through the one-way valve I7, the hydraulic one-way valve 13 is opened through the three-position six-way valve 17, the three-position five-way valve 18 is positioned in the middle position, oil with higher pressure in the main pump and the auxiliary pump sequentially enters the oil inlet of the hydraulic chuck 9 and the clamping oil port of the clamp holder 10 respectively through the inner oil inlet C2 and the working oil ports A3 and A4, so that the hydraulic chuck 9 and the clamp holder 10 clamp drill rods simultaneously, and the last drill rod clamped by the hydraulic chuck 9 rotates reversely under the drive of the hydraulic motor, so that the drill rod can be tripped from the previous drill rod, and simultaneously, the feed oil cylinder 11 is automatically retreated at the tripping time due to the opening of the hydraulic one-way valve 13, and the damage is avoided.
When the last section of drill rod is completely disconnected, the rotary valve plate is switched to the middle position, the hydraulic control motor stops rotating, the three-position five-way valve 18 automatically resets to the lower position under the action of the reset spring, so that the clamp holder 10 is clamped, the hydraulic chuck 9 is loosened, and the last section of drill rod falls off by self weight; then controlling the feed valve plate 3 to the lower position, so that the feed oil cylinder 11 drives the chuck to advance; when the feeding cylinder 11 advances to the maximum stroke, the above-mentioned tripping process is repeated, and the drill rod can be sequentially taken out.
Although embodiments of the present invention have been disclosed above, it is not limited to the details and embodiments shown and described, it is well suited to various fields of use for which the invention would be readily apparent to those skilled in the art, and accordingly, the invention is not limited to the specific details and illustrations shown and described herein, without departing from the general concepts defined in the claims and their equivalents.
Claims (10)
1. A multi-way reversing valve of a full-hydraulic tunnel drilling machine is characterized in that: comprises a rotary valve block, a switching valve block, a feeding valve block and a tail plate valve block which are connected in sequence; the rotary valve plate is used for connecting a forward oil inlet and a reverse oil inlet of a rotary motor of the tunnel drilling machine; the feeding valve plate and the tail plate valve plate are used for controlling the extension and retraction of the feeding oil cylinder;
the switching valve plate comprises a three-position five-way valve and a three-position six-way valve, the three-position five-way valve is a hydraulic control reversing valve and comprises an oil inlet P2, working oil ports A3, A4 and B4, an internal oil return port T1, an internal oil inlet C2 and internal control oil ports K1, K2 and K5 for controlling the action of a valve rod of the valve plate, and the internal oil inlet C2 is communicated with the oil inlet P1 and the oil inlet P2 of the rotary valve plate through one-way valve respectively and is used for being connected with a main pump and a secondary pump of the tunnel drilling machine respectively; the working oil port A3 is used for connecting an oil inlet of a hydraulic chuck of the tunnel drilling machine, and the working oil ports A4 and B4 are respectively used for connecting a clamping oil port and a loosening oil port of a clamp holder of the tunnel drilling machine;
when the three-position five-way valve is in the middle position, the internal oil inlet C2 is communicated with the working oil ports A3 and A4, and the working oil port B4 is communicated with the internal oil return port T1, so as to realize tripping of a drill rod during tripping; when the three-position five-way valve is in an upper position, the internal oil inlet C2 is communicated with the working oil ports A3 and B4, and the working oil port A4 is communicated with the internal oil return port T1, so that clamping of the hydraulic chuck and loosening of the clamp holder during tripping are realized; when the three-position five-way valve is in the lower position, the internal oil inlet C2 is communicated with the working oil port A4, and the working oil ports A3 and B4 are communicated with the internal oil return port T1 so as to enable the hydraulic chuck to be loosened and the clamp holder to be clamped;
the three-position six-way valve comprises working oil ports A1 ', B1', A2 'and B2', and control oil ports K3 and K4, wherein the working oil port A1 'is communicated with a working oil port A1 arranged on the rotary valve plate through the internal control oil port K1 and an internal oil passage, the working oil port B1' is communicated with a working oil port B1 arranged on the rotary valve plate sequentially through the internal control oil port K2, a one-way valve I and an internal oil passage, the working oil port A2 'is communicated with an oil inlet of a hydraulic control one-way valve arranged on a tailboard valve plate, and the working oil port B2' is communicated with an oil outlet B2 arranged on the feed valve plate; the control oil port K3 is communicated with a control oil port of the hydraulic control one-way valve, and the control oil port K4 is communicated with the internal control oil port K5;
when the three-position six-way valve is in an upper position, the control oil port K4 is communicated with the working oil port B2 ', the working oil ports A1' and B1 'are communicated, the control oil port K3 and the working oil port A2' are cut off, and the three-position five-way valve is in an upper position when the rotary motor is reversed, so that the clamp holder is opened to realize automatic rotary connection of the drill rod; when the three-position six-way valve is in the lower position, the control oil port K4 is communicated with the working oil port A2 ', the control oil port K3 is communicated with the working oil port B1', and the working oil ports A1 'and B2' are cut off; for opening the pilot operated check valve to float the feed cylinder for tripping the drill pipe.
2. The all-hydraulic tunnel drilling machine multi-way reversing valve according to claim 1, wherein: when the three-position six-way valve is in the middle position, the control oil port K4 is communicated with the working oil port B2 ', the control oil port K3 is communicated with the working oil port B1', and the working oil ports A1 'and A2' are cut off.
3. The all-hydraulic tunnel drilling machine multi-way reversing valve according to claim 1, wherein: the rotary valve plate comprises a four-position five-way valve, wherein the four-position five-way valve comprises an oil inlet P1, working oil ports A1 and B1, an oil return port T and an internal working oil port C1; the oil inlet P1 is used for connecting a main pump of the tunnel drilling machine, and the working oil ports A1 and B1 are respectively used for connecting a forward oil inlet and a reverse oil inlet of a rotary motor of the tunnel drilling machine.
4. The all-hydraulic tunnel drilling machine multi-way reversing valve according to claim 3, wherein: when the four-position five-way valve is in the middle position, the oil inlet P1 is communicated with the working oil ports A1 and B1 and the internal working oil port C1, and the oil return port T is cut off; when the four-position five-way valve is in the first upper position, the oil inlet P1 is communicated with the working oil port A1, the working oil port B1 is communicated with the internal working oil port C1, and the oil return port T is cut off; when the four-position five-way valve is in the second upper position, the oil inlet P1 is communicated with the working oil port A1, the working oil port B1 is communicated with the oil return port T, and the internal working oil port C1 is cut off; when the four-position five-way valve is in the lower position, the oil inlet P1 is communicated with the working oil port B1, the working oil port A1 is communicated with the internal working oil port C1, and the oil return port T is cut off.
5. The all-hydraulic tunnel drilling machine multi-way reversing valve according to claim 1, wherein: the feeding valve plate comprises a three-position four-way valve, the three-position four-way valve comprises an oil inlet P2 ', a working oil port A2 ', a working oil port B2 ', and an oil return port T, the oil inlet P2 ' is respectively communicated with the oil inlet P2 and the internal working oil port C1 through internal oil channels, the working oil port A2 ' is respectively communicated with the working oil port A2 ' and the oil inlet of a hydraulic control one-way valve arranged on the tail plate valve plate through internal oil channels, and the working oil port B2 is communicated with the working oil port B2 ' through internal oil channels for connecting a rodless cavity of a feeding oil cylinder of the tunnel drilling machine.
6. The all-hydraulic tunnel drilling machine multi-way reversing valve according to claim 1, wherein: the tail plate valve block comprises a tail plate valve body and the hydraulic control one-way valve arranged on the valve body, and a working oil port A2 is arranged on the tail plate valve body and used for being connected with a rod cavity of a feed oil cylinder of the tunnel drilling machine.
7. The multi-way reversing valve of the full-hydraulic tunnel drilling machine according to claim 5, wherein the multi-way reversing valve is characterized in that: and a sequence valve is arranged between the oil inlet P2 and the oil inlet P2', and is used for providing oil with certain pressure for an inner oil inlet C2 of the three-position five-way valve, so that certain oil pressure is always provided in a clamping oil cavity of the tunnel drilling machine clamp holder to clamp a drill rod, and the drill rod is prevented from sliding down.
8. The all-hydraulic tunnel drilling machine multi-way reversing valve according to claim 3 or 4, characterized in that: and a main overflow valve is arranged between the oil inlet P1 and the oil return port T on the rotary valve plate and used for preventing the system from being damaged due to the fact that the oil pressure entering the system is too high.
9. The all-hydraulic tunnel drilling machine multi-way reversing valve according to claim 3 or 4, characterized in that: the four-position five-way valve is a manual reversing valve.
10. The all-hydraulic tunnel drilling machine multi-way reversing valve according to claim 1, wherein: the three-position six-way valve is a manual reversing valve.
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| CN110513057B (en) * | 2019-08-07 | 2020-10-16 | 中煤科工集团西安研究院有限公司 | Suspension type underground drill rig shackle device and method |
| CN110778557B (en) * | 2019-11-14 | 2024-05-10 | 锦州力特液压科技有限公司 | Multi-way reversing valve of multifunctional tunnel drilling machine |
| CN112780627B (en) * | 2021-03-03 | 2022-12-20 | 徐州威世泽机电设备有限公司 | Multi-way valve and hydraulic system |
| CN113847295B (en) * | 2021-10-18 | 2023-11-10 | 中煤科工集团重庆研究院有限公司 | Hydraulic control system and control method for coal mine linkage drilling machine |
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