CN211039203U - Multi-way reversing valve of multifunctional tunnel drilling machine - Google Patents
Multi-way reversing valve of multifunctional tunnel drilling machine Download PDFInfo
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- CN211039203U CN211039203U CN201921967580.6U CN201921967580U CN211039203U CN 211039203 U CN211039203 U CN 211039203U CN 201921967580 U CN201921967580 U CN 201921967580U CN 211039203 U CN211039203 U CN 211039203U
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Abstract
A multi-way reversing valve of a multifunctional underground drill rig comprises an oil inlet valve block, a rotary valve block, a shuttle valve block, a feed valve block and a switching valve block, wherein the switching valve block comprises a third reversing valve, a fourth reversing valve, a differential oil cylinder and a one-way valve, a clamping oil port A3, a loosening oil port B3 and a chuck oil port A4, a P port of the third reversing valve is communicated with a clamping oil port A3, P ' and P ' ports of the third reversing valve are respectively communicated with control oil ports at two ends of the fourth reversing valve correspondingly, an A port of the third reversing valve is communicated with an A port of a second reversing valve arranged in the feed valve block, a B port of the third reversing valve is communicated with a working oil port A1 through the one-way valve, the fourth reversing valve is a three-position five-way hydraulic control reversing valve, the P port of the fourth reversing valve is communicated with an oil port A of the shuttle valve, the A port A4 of the chuck oil port, the A ' and B ports of the second reversing valve are respectively communicated with a clamping oil port A3 and a B3 of the loosening oil port A, the differential oil port of the fourth reversing valve.
Description
Technical Field
The utility model relates to a multichannel switching-over valve, in particular to multi-functional gallery rig multichannel switching-over valve.
Background
The tunnel drilling machine is a drilling machine for drilling in an underground tunnel, and is mainly used for engineering construction of 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 feeding oil cylinder, the 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 handle to change direction, the power head rotates to enable the hydraulic chuck to clamp the drill rod to rotate, meanwhile, two slips of the clamp holder are opened, the drill rod is loosened, the handle is pushed forward to change direction, the power head advances under the action of the pushing oil cylinder to drill; after a drill rod is driven in, the handle is pushed back to the middle position, the power head stops advancing, the handle is rotated back to the middle position, the power head stops rotating, and the two slips of the clamp holder clamp the driven drill rod to prevent the drill rod from falling. And a drill rod is additionally arranged at the tail part of the drill rod, the push handle is pulled backwards for reversing, the hydraulic chuck is loosened, the power head is retreated to the tail part, and the drill is circularly drilled by continuously additionally arranging the drill rod. The clamping and the opening of the chuck and the clamping and the opening of the clamper are controlled by a control valve group.
The conventional drilling multi-way valve has the problem that a drill rod slides down in the drilling process, the reason is that a power head starts to rotate, a chuck and a clamp holder act simultaneously, the chuck needs a stroke when being clamped from loosening, the clamp holder is changed from clamping into loosening, the drill rod can be immediately loosened, and the drill rod can slide down for a certain distance in the time difference to cause danger.
The chinese utility model patent publication No. CN207246144U discloses a double-tight multichannel reversing valve for tunnel drilling machine, which comprises an oil inlet valve plate, a rotary valve plate, a shuttle valve plate, a feed valve plate and a switching valve plate which are connected in sequence; the oil inlet valve plate is used for connecting a main pump of the tunnel drilling machine and an oil tank; the rotary valve plate is used for connecting the oil inlet P1 and the oil return port T1 with a forward and reverse oil inlet of a rotary motor of the gallery drilling machine; the feeding valve plate is used for controlling the extension and retraction of the feeding oil cylinder; the switching valve plate comprises a three-position four-way manual reversing valve, a two-position three-way manual reversing valve I, a two-position three-way manual reversing valve II, a two-position three-way hydraulic control reversing valve, a two-position four-way hydraulic control reversing valve, a balance valve and a shuttle valve; the switching valve piece is provided with a feed cylinder pushing oil port A2, a clamp clamping oil port A4, a clamp releasing oil port B4, a chuck oil port A3 and an oil return port T2.
The problems with such a diverter valve are as follows: 1. the switching valve block adopts three manual reversing valves, namely a three-position four-way manual reversing valve, a two-position three-way manual reversing valve I and a two-position three-way manual reversing valve II to control the drilling-up and drilling-down working conditions of the tunnel drilling machine and the actions of the clamp holder and the chuck, the structure is complex, the operation is complex, and the drilling efficiency during operation is influenced; 2. the switching valve block adopts a two-position three-way hydraulic control reversing valve and a two-position four-way hydraulic control reversing valve to respectively cooperate with a two-position three-way manual reversing valve I and a two-position three-way manual reversing valve II to control the actions of a clamp holder and a chuck of the tunnel drilling machine, the structure is complex, the operation is complex, and the operation efficiency is influenced. 3. In addition, the drill rod needs to be connected with a cooling water pipe for water cooling in the drilling process, and the cooling water pipe is connected to the last section of drill rod; when the hydraulic motor starts to rotate forwards, the clamp holder is changed into an open state, so that a drill rod cannot be additionally arranged between the clamp holder and the hydraulic chuck, the drill rod can only be additionally arranged at the lowest end behind the hydraulic chuck, the water pipe which is connected before each drill rod is added needs to be firstly detached, the water pipe is reconnected after the drill rod is additionally arranged, and drilling efficiency is greatly reduced.
Disclosure of Invention
The utility model aims to solve the technical problem of providing a multi-way reversing valve of a multifunctional underground drill rig, which has simple structure and simple operation and can improve the operation efficiency, and the valve not only can ensure that a drill rod is always clamped, thereby avoiding the drill rod from sliding off; and can realize when the hydraulic motor is unloaded corotation, the holder keeps the clamping state to the realization is installed the drilling rod additional in front of the hydraulic chuck, avoids all demolising the water pipe when adding the drilling rod at every turn.
The technical scheme of the utility model as follows:
a multi-way reversing valve of a multifunctional underground drill rig comprises an oil inlet valve plate, a rotary valve plate, a shuttle valve plate, a feed valve plate and a switching valve plate which are sequentially connected; the oil inlet valve plate is provided with an oil inlet P1 and an oil return port T1 and is used for connecting a main pump and an oil tank of the underground drill rig; the rotary valve plate is used for connecting the oil inlet P1 and the oil return port T1 with a forward and reverse oil inlet of a hydraulic motor of the underground drill rig; the feeding valve plate is used for controlling the extension and retraction of the feeding oil cylinder; it is characterized in that:
the switching valve plate comprises a third reversing valve, a fourth reversing valve, a differential oil cylinder and a one-way valve; a clamping oil port A3, a loosening oil port B3 and a chuck oil port A4 which are arranged on the valve plate;
the third reversing valve is a three-position six-way reversing valve, a P port of the third reversing valve is communicated with the clamping oil port A3 through an internal oil duct, P 'ports and P' ports of the third reversing valve are respectively communicated with control oil ports M, N at two ends of the fourth reversing valve correspondingly, an A port of the third reversing valve is communicated with an A port of a second reversing valve arranged in the feeding valve sheet, and a B port of the third reversing valve is communicated with a working oil port A1 arranged on the rotary valve sheet through the internal oil duct and the check valve; when the pressure of the working oil port A1 is higher than the pressure of the port B of the third reversing valve, the one-way valve is opened; the port P1' of the third reversing valve is communicated with the port B of the second reversing valve; the device is used for selecting the drill-tripping or drill-lowering working condition of the tunnel drilling machine and the adding position of the drill rod;
the fourth reversing valve is a three-position five-way hydraulic control reversing valve, a port P of the fourth reversing valve is communicated with a shuttle valve oil outlet A arranged in a shuttle valve sheet through an internal oil duct, a port A of the fourth reversing valve is communicated with a chuck oil port A4, and a port A' and a port B of the fourth reversing valve are respectively correspondingly communicated with a clamping oil port A3 and a loosening oil port B3; the hydraulic chuck is used for controlling the actions of the clamp and the hydraulic chuck;
the differential oil cylinder is arranged at one end of a control oil port M of the fourth reversing valve, a rod cavity of the differential oil cylinder is communicated with the control oil port M, a rodless cavity oil port L of the differential oil cylinder is communicated with a working oil port B1 arranged on the rotary valve plate through an internal oil duct, and the fourth reversing valve is in a neutral balance state when the hydraulic motor rotates in a no-load forward mode.
Preferably, the shuttle valve plate comprises a shuttle valve, a sequence valve and an oil inlet P2 for connecting the auxiliary pump of the underground drill rig; two oil inlets S1 and S2 of the shuttle valve are respectively and correspondingly communicated with the oil inlets P1 and P2 through internal oil passages; the sequence valve is connected between the oil inlet P2 and the port P of the second reversing valve through an internal oil passage.
Preferably, a check valve plate is further arranged between the feeding valve plate and the switching valve plate, the check valve plate comprises a double-control balance valve arranged in the valve plate and a working oil port B2 arranged on the valve plate, the port B of the second reversing valve is communicated with a working oil port B2 through the double-control balance valve and an internal oil duct, an internal control oil port K1 of the double-control balance valve is communicated with a working oil port A1 on the rotary valve plate through the internal oil duct, and an internal control oil port K2 of the double-control balance valve is communicated with a working oil port A2 on the feeding valve plate through the internal oil duct.
Further preferably, when the third direction switching valve is at the neutral position, P, P ' and P ' ports thereof are in communication with each other, and A, B, P1 ' ports thereof are blocked, respectively; when the third direction-changing valve 14 is at the upper position, the port P is closed, the port P ' is communicated with the port A, the port P ' is communicated with the port B and is communicated with the port P1 ' through a throttling groove arranged on the valve rod; when the third direction valve 14 is in the lower position, the ports P and B are closed, the port P ' is connected to the port P1 ', and the port P ' is connected to the port a; oil discharged by the fourth reversing valve enters oil cavities at two ends of a valve rod of the fourth reversing valve 15 through the third reversing valve 14 in the middle position, and the fourth reversing valve 15 is in the middle position balance state under the action of equal oil pressure at two ends; the hydraulic chuck is used for realizing that the clamp and the hydraulic chuck are in a clamping state so as to install a drill rod in front of the hydraulic chuck.
Preferably, when the fourth reversing valve is in the neutral position, the port P is respectively communicated with the port A and the port A', and the port B is communicated with the port T; when the fourth reversing valve is positioned at the upper position, the port P is respectively communicated with the port A and the port B, and the port A' is communicated with the port T; when the fourth direction-changing valve is at down position, its P port is communicated with A' port, and its A, B ports are communicated with T port.
Preferably, the rotary valve plate comprises a first reversing valve and working oil ports A1 and B1 arranged on the surface of the valve plate; the first reversing valve is a three-position six-way reversing valve, a P port and a P 'port of the first reversing valve are communicated with each other and are communicated with the oil inlet P1 through an internal oil duct, a T port of the first reversing valve is communicated with the oil return port T1 through the internal oil duct, a A, B port of the first reversing valve is respectively communicated with the working oil ports A1 and B1 through the internal oil duct, and a P1' port of the first reversing valve is communicated with a P port of the second reversing valve through the internal oil duct; the working oil ports A1 and B1 are respectively used for connecting a reverse rotation oil inlet and a forward rotation oil inlet of a hydraulic motor of the underground drill rig.
More preferably, when the first direction valve is at the neutral position, the ports P and P1 'are connected, the ports A, B are connected with the ports T, and the ports P' are disconnected; when the first reversing valve is positioned at an upper position, the port P and the port P1 'are cut off, the port P' is communicated with the port B, and the port A is communicated with the port T; when the first change valve is at lower position, its P port and P1 'port are closed, its P' port and A port are communicated, and its B port and T port are communicated.
Preferably, the feeding valve plate comprises the second reversing valve and a working oil port A2 arranged on the valve plate; the internal structure of the second reversing valve is completely the same as that of the first reversing valve, a port P and a port P 'are communicated with each other, a port T and a port P1' are respectively communicated with the oil return port T1 through an internal oil duct, and a port A is communicated with the working oil port A2 through an internal oil duct; the working oil port A2 is used for connecting a rodless cavity of the feeding oil cylinder.
Preferably, the first, second and third directional control valves are hydraulic directional control valves, and a group of control oil ports are led out from two sides of the rotary valve plate, the feeding valve plate and the switching valve plate respectively and are used for being connected with a pilot valve to control the directional control of the directional control valves.
More preferably, a relief valve is provided between the port P of the second direction switching valve and the oil return port T1 to restrict the oil pressure entering the second direction switching valve.
The utility model has the advantages that:
1. the switching valve plate comprises a third reversing valve, a fourth reversing valve, a differential oil cylinder and a one-way valve, the third reversing valve is a three-position six-way reversing valve, and the third reversing valve is used for controlling and selecting the drill-up or drill-down working condition of the tunnel drilling machine and selecting the adding position of a drill rod; the structure is simpler, the operation is simpler and more convenient, and the working efficiency can be effectively improved; the clamp and the hydraulic chuck clamp the drill rod simultaneously when the drilling machine stops rotating; when the power head starts to rotate, the hydraulic chuck is always clamped only by opening the clamp, so that the drill rod is prevented from sliding down when the states of the clamp and the hydraulic chuck are switched.
2. The fourth reversing valve 15 is a three-position five-way hydraulic control reversing valve, a port P of the fourth reversing valve is communicated with an oil outlet A of the shuttle valve 9 through an internal oil duct, a port A of the fourth reversing valve is communicated with a chuck oil port A4 through the internal oil duct, and a port A' and a port B of the fourth reversing valve are respectively and correspondingly communicated with a clamping oil port A3 and a loosening oil port B3 through the internal oil duct; the hydraulic chuck is used for controlling the actions of the clamp and the hydraulic chuck; therefore, the valve can ensure that the drill rod is always clamped by the clamp or the hydraulic chuck, and the drill rod is prevented from sliding off; and the cooperation through third switching-over valve and fourth switching-over valve can realize when the unloaded corotation of hydraulic motor, the holder keeps the clamping state to the realization is installed the drilling rod additional in front of the hydraulic chuck, avoids all demolising the water pipe when adding the drilling rod at every turn, has further improved the operating efficiency.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a bottom view of fig. 1.
Fig. 3 is a left side view of fig. 2.
Fig. 4 is a hydraulic schematic diagram of the present invention.
In the figure: the hydraulic control valve comprises an oil inlet valve plate 1, a rotary valve plate 2, a shuttle valve plate 3, a feeding valve plate 4, a one-way valve plate 5, a switching valve plate 6, a main overflow valve 7, a first reversing valve 8, a shuttle valve 9, a sequence valve 10, an overflow valve 11, a second reversing valve 12, a one-way valve 13, a third reversing valve 14, a fourth reversing valve 15, a double-control balance valve 16, a differential oil cylinder 17, a hydraulic motor 18, a feeding oil cylinder 19, a clamp 20 and a hydraulic chuck 21.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
As shown in fig. 1-4, the utility model relates to a multi-way reversing valve for a multi-functional tunnel drilling machine, which comprises an oil inlet valve plate 1, a rotary valve plate 2, a shuttle valve plate 3, a feeding valve plate 4, a one-way valve plate 5 and a switching valve plate 6 which are connected in sequence through bolts; the oil inlet valve plate 1 is used for connecting oil inlet and total oil return of a main pump; the rotary valve plate 2 is used for connecting a forward oil inlet and a reverse oil inlet of a hydraulic motor 18 of the tunnel drilling machine, so that forward rotation and reverse rotation of the hydraulic motor 18 are controlled; the switching valve plate 6 is used for controlling the clamping and the loosening of a hydraulic chuck 21 and a clamper 20 of the tunnel drilling machine during drilling and tripping, and the feeding valve plate 4 is used for controlling the expansion and contraction of the feeding oil cylinder 19.
The oil inlet valve plate 1 comprises a main overflow valve 7 arranged in the valve plate, and an oil inlet P1 and an oil return port T1 which are arranged on the surface of the valve plate, wherein the oil inlet P1 and the oil return port T1 are respectively used for connecting a main pump and an oil tank of the gallery drilling machine; the main overflow valve 7 is connected between the oil inlet P1 and the oil return port T1 through an internal oil passage arranged in the oil inlet valve plate 1, and is used for preventing the system from being damaged due to overhigh oil pressure entering the system.
The rotary valve plate 2 comprises a first reversing valve 8 arranged in the valve plate and working oil ports A1 and B1 arranged on the surface of the valve plate. The first reversing valve 8 is a three-position six-way reversing valve, a P port and a P 'port of the first reversing valve are communicated with each other and are communicated with the oil inlet P1 through an internal oil duct, a T port of the first reversing valve is communicated with the oil return port T1 through an internal oil duct, a A port and a B port of the first reversing valve are respectively communicated with the working oil ports A1 and B1 through internal oil ducts, and a P1' port of the first reversing valve is communicated with a P port of the second reversing valve 12 arranged in the feeding valve block 4 through an internal oil duct penetrating through the shuttle valve block 3. The working oil ports A1 and B1 are respectively used for connecting a reverse rotation oil inlet and a forward rotation oil inlet of the hydraulic motor 18 of the underground drill rig.
When the first direction valve 8 is at the neutral position, the ports P and P1 'are communicated, the ports A, B are communicated with the ports T, and the ports P' are closed. When the first direction valve 8 is at the upper position, the port P and the port P1 'are cut off, the port P' is communicated with the port B, and the port A is communicated with the port T. When the first direction valve 8 is at the lower position, the port P and the port P1 'are closed, the port P' is communicated with the port a, and the port B is communicated with the port T.
The shuttle valve plate 3 comprises a shuttle valve 9 and a sequence valve 10 which are arranged in the valve plate, and an oil inlet P2 which is arranged on the surface of the valve plate; two oil inlets S1 and S2 of the shuttle valve 9 are respectively and correspondingly communicated with the oil inlets P1 and P2 through internal oil passages, and an oil outlet A of the shuttle valve 9 is communicated with a port P of a fourth reversing valve 15 arranged in the switching valve plate 6 through the internal oil passages. The oil inlet P2 is used for connecting an auxiliary pump of a tunnel drilling machine; the sequence valve 10 is connected between the oil inlet P2 and the port P of the second reversing valve of the feed valve plate 4 through an internal oil passage, and when the oil pressure of the oil inlet P2 reaches a certain pressure, the sequence valve 10 is pushed open to be communicated with the port P of the second reversing valve, the opening pressure of the sequence valve 10 is 8MPa, and the sequence valve is used for providing oil with a certain pressure for the shuttle valve 9, so that a certain oil pressure is always provided in a clamping oil cavity of the gallery drilling machine clamp 20 to clamp a drill rod, and the drill rod is prevented from sliding down.
The feeding valve plate 4 comprises a second reversing valve 12 arranged in the valve plate, and a working oil port A2 and a speed regulating port K which are arranged on the valve plate. The second reversing valve 12 is a three-position six-way reversing valve, the internal structure of the second reversing valve is completely the same as that of the first reversing valve 8, a port P and a port P 'are communicated with each other, a port T and a port P1' are respectively communicated with the oil return port T1 through an internal oil duct, a port A is communicated with the working oil port A2 through the internal oil duct, and a port B is communicated with the double-control balance valve 16 arranged in the one-way valve plate 5 through the internal oil duct. The working oil port A2 is used for connecting a rodless cavity of the feeding oil cylinder 19; the speed regulating port K is communicated with a port B of the second reversing valve 12 through an internal oil passage and is used for regulating the speed of the feeding oil cylinder 19 by an external throttle valve.
The check valve plate 5 comprises a double-control balance valve 16 arranged in the valve plate and a working oil port B2 arranged on the valve plate. The working oil port B2 is communicated with the port B of the second directional valve 12 through the double control balance valve 16 and the internal oil passage, and is used for connecting the rod cavity of the feed cylinder 19. The double-control balance valve 16 is a balance valve with two internal control oil ports K1 and K2, an internal control oil port K1 of the double-control balance valve is communicated with a working oil port a1 on the rotary valve plate 2 through an internal oil duct, and an internal control oil port K2 of the double-control balance valve is communicated with a working oil port a2 on the feed valve plate 4 through an internal oil duct, and the internal control oil ports K2 and the working oil port a2 are respectively used for controlling the opening of.
The switching valve plate 6 comprises a third reversing valve 14, a fourth reversing valve 15, a differential oil cylinder 17 and a one-way valve 13 which are arranged in the valve plate, and a clamping oil port A3, a loosening oil port B3, a chuck oil port A4 and an oil return port T2 which are arranged on the valve plate. The clamping oil port A3 and the loosening oil port B3 are respectively used for connecting a clamping cavity oil port and a loosening cavity oil port of the gripper 20; the chuck oil port A4 is used for connecting an oil inlet cavity of the hydraulic chuck 21; oil return port T2 is used to connect to a tank to allow the hydraulic chuck 21 and clamp 20 to release oil.
The third reversing valve 14 is a three-position six-way reversing valve, a P port of the third reversing valve is communicated with the clamping oil port A3 through an internal oil passage arranged in the switching valve plate 6, a P 'port and a P' port of the third reversing valve are respectively communicated with two control oil ports M, N of the fourth reversing valve 15 through the internal oil passage, an a port of the third reversing valve is communicated with an a port of the second reversing valve 12 through the internal oil passage, a B port of the third reversing valve is communicated with an a port of the first reversing valve 8, namely a working oil port a1 through the internal oil passage and the check valve 13, and when the pressure of the a port of the first reversing valve 8 is higher than that of the B port of the third reversing valve 14, the check valve 13 is opened, so that the B port of the third reversing valve 14 can be supplied with oil through the; otherwise the non-return valve 13 is blocked. The port P1' of the third direction valve 14 is communicated with the port B of the second direction valve 12 through an internal oil passage; the device is used for controlling and selecting the pulling-out working condition or the pulling-down working condition of the underground drill rig and selecting the adding position of the drill rod.
When the third direction valve 14 is at the neutral position, P, P ' and P ' ports thereof are in communication with each other, and A, B, P1 ' ports thereof are blocked, respectively; when the third direction-changing valve 14 is at the upper position, the port P is closed, the port P ' is communicated with the port A, the port P ' is communicated with the port B and is communicated with the port P1 ' through a throttling groove arranged on the valve rod; when the third direction valve 14 is in the lower position, ports P and B are closed, port P ' is connected to port P1 ', and port P ' is connected to port a.
The fourth reversing valve 15 is a three-position five-way hydraulic control reversing valve, a port P of the fourth reversing valve is communicated with an oil outlet A of the shuttle valve 9 through an internal oil duct, a port T of the fourth reversing valve is communicated with an oil return port T2, a port A of the fourth reversing valve is communicated with a chuck oil port A4 through the internal oil duct, and a port A' and a port B of the fourth reversing valve are respectively and correspondingly communicated with a clamping oil port A3 and a loosening oil port B3 through the internal oil duct; for controlling the action of the gripper and the hydraulic chuck.
When the fourth reversing valve 15 is in the middle position, the port P is respectively communicated with the port A and the port A', and the port B is communicated with the port T; when the fourth reversing valve 15 is at the upper position, the port P is respectively communicated with the port A and the port B, and the port A' is communicated with the port T; when the fourth direction valve 15 is at the lower position, the port P is connected to the port a', and the ports a and B are connected to the port T.
The differential oil cylinder 17 is arranged at one end of a control oil port M of the fourth reversing valve 15, a rod cavity of the differential oil cylinder 17 is communicated with the control oil port M through a cavity at one end of a valve rod of the fourth reversing valve 15, a rodless cavity oil port L of the differential oil cylinder 17 is communicated with the working oil port B1 through an internal oil duct, and the control oil port M, N is respectively arranged at two ends of a valve rod of the fourth reversing valve 15 and used for controlling the reversing of the fourth reversing valve 15.
The first reversing valve, the second reversing valve and the third reversing valve are respectively hydraulic control reversing valves, a group of control oil ports a1 and b1 are led out from two sides of the rotary valve plate of the first reversing valve, a group of control oil ports a2 and b2 are led out from two sides of the feed valve plate of the second reversing valve, and a group of control oil ports a3 and b3 are led out from two sides of the switching valve plate of the third reversing valve and are respectively used for being connected with pilot valves to control reversing of the first reversing valve, the second reversing valve and the third reversing valve. A relief valve is connected between the port P of the second direction valve 12 and the oil return port T1 through an internal oil passage to restrict the oil pressure entering the second direction valve 12.
When the underground drill rig is in a stop state in the working process, the first reversing valve 8, the second reversing valve 12, the third reversing valve 14 and the fourth reversing valve 15 are all in neutral positions, at the moment, the hydraulic motor 18 stops rotating, and the feeding oil cylinder 19 stops moving. The hydraulic oil of the main pump enters from an oil inlet P1, passes through the first reversing valve 8 and the second reversing valve 12, reaches an oil return port T1 and returns to the oil tank; the auxiliary pump hydraulic oil enters from an oil inlet P2, rises to 8MPa pressure, opens the sequence valve 10, and returns to the oil tank after passing through the second reversing valve 12; the pressure of 8MPa is transmitted to the fourth reversing valve through the shuttle valve 9 and respectively reaches the two control oil ports M, N of the fourth reversing valve 15 through the third reversing valve, at the moment, the fourth reversing valve 15 is in a middle position due to the fact that the pressures of two ends of the valve rod are equal, meanwhile, hydraulic oil discharged through the fourth reversing valve 15 respectively enters a clamping oil cavity of the hydraulic clamp holder 20 and the hydraulic chuck 21 through the clamping oil port A3 and the chuck oil port A4, the hydraulic clamp holder 20 and the hydraulic chuck 21 respectively clamp the drill rod strongly, and the drill rod can be effectively prevented from slipping.
When the drilling state is entered, if a drill rod adding mode is adopted, the third reversing valve 14 is switched to the upper position through the corresponding pilot valve, the first reversing valve 8 is switched to the upper position through the corresponding pilot valve, main pump oil drives the hydraulic motor 18 to rotate forward through the first reversing valve 8, the oil reaching the working oil port B1 reaches the rodless cavity oil port L of the differential oil cylinder 17 through the internal oil passage at the same time, the cylinder rod of the differential oil cylinder 17 is pushed to move downwards, the fourth reversing valve 15 is pushed to be reversed to the upper position, the pressure oil at the oil outlet A of the shuttle valve respectively reaches the loosening oil port B3 and the chuck oil port A4 through the fourth reversing valve 15, the gripper 20 is loosened, the hydraulic chuck 21 clamps the drill rod to start to rotate forward, the second reversing valve 12 is switched to the upper position through the corresponding pilot valve, the sequence valve 10 is opened by the auxiliary pump oil, sequentially flows through the second reversing valve 12 and the double control balance valve 16 to reach the working oil port B2 and enters the rod cavity of the feeding oil cylinder 19, and the drill rod driven by.
When the feed cylinder 19 moves forward to the maximum stroke, the second reversing valve 12 returns to the middle position through the corresponding pilot valve, the feed cylinder 19 stops moving forward, the first reversing valve 8 returns to the middle position at the same time, and the hydraulic motor 18 stops rotating, at the same time, the rodless cavity oil port L of the differential cylinder 17 realizes pressure release through the first reversing valve 8, the fourth reversing valve 15 automatically returns to the middle position under the action of an internal return spring, so that the gripper 20 clamps the drill rod, a drill rod is screwed and installed at the tail of the drilled drill rod, then the second reversing valve 12 is switched to the lower position, oil entering from the oil inlet 539P 2 enters through the first reversing valve 8 and the oil inlet P2, the oil enters through the sequence valve 10 and flows through the second reversing valve 12 to the working oil port A2 and enters the rodless cavity of the feed cylinder 19, meanwhile, the control oil port N of the third reversing valve 14 of the oil output through the second reversing valve 12 reaches the fourth reversing valve 15, the control oil port N of the upper double-control reversing valve 14 reaches the fourth reversing valve 15, the working oil port A2 and the feed cylinder 19 returns to the feed cylinder 19 through the fourth reversing valve 12, and the feed cylinder 19 is opened, and the feed cylinder is controlled by the feed cylinder 19, the feed cylinder 21, the feed cylinder is released, the feed cylinder 14, and the feed cylinder is released, the feed cylinder 14 is released, and the feed cylinder is released, and the.
When the hydraulic chuck 21 and the gripper 20 clamp the drill rod simultaneously due to the fact that the fourth reversing valve is in the middle position, the system pressure rises immediately, when the pressure of the rodless cavity L is higher than the pressure of the control oil port A, the cylinder rod of the differential cylinder 17 is pushed to move downwards, the fourth reversing valve 15 is pushed to move upwards, the hydraulic chuck 21 and the gripper 20 clamp the drill rod simultaneously due to the fact that the fourth reversing valve is in the middle position, the system pressure rises immediately, when the pressure of the rodless cavity L is higher than the pressure of the control oil port M, the cylinder rod of the differential cylinder 17 is pushed to move downwards, the fourth reversing valve 15 is pushed to move upwards, the pressure of the rod-less cavity L is higher than the pressure of the control oil port M, the pressure of the rod-free cavity 2 is pushed to release the hydraulic pressure of the second reversing valve 3519A, the hydraulic chuck 15 and the hydraulic control oil port B of the second reversing valve 15 is released, the hydraulic cylinder 15 is enabled to release the hydraulic pressure of the second reversing valve 3519, the hydraulic cylinder rod-free hydraulic cylinder is enabled to release the hydraulic cylinder, the hydraulic cylinder clamp the hydraulic chuck 21 and the hydraulic cylinder clamp the hydraulic cylinder 19, the hydraulic cylinder clamp the hydraulic oil port B19 is enabled to release the hydraulic cylinder, the hydraulic cylinder 19, the hydraulic cylinder clamp the hydraulic cylinder 23 is enabled to release the hydraulic cylinder, the hydraulic cylinder clamp hydraulic cylinder, the hydraulic cylinder is enabled to release the hydraulic cylinder, the hydraulic cylinder clamp the hydraulic cylinder is enabled to release the hydraulic cylinder, the hydraulic cylinder is enabled to release the hydraulic cylinder, the hydraulic.
When the feed cylinder 19 advances to the maximum stroke, the second reversing valve 12 is switched back to the middle position, the feed cylinder 19 stops advancing, the first reversing valve 8 is switched back to the middle position, and the hydraulic motor 18 stops rotating, at the moment, the rodless cavity oil port L of the differential cylinder 17 releases pressure through the first reversing valve, the fourth reversing valve 15 automatically returns to the middle position under the action of an internal return spring, so that the gripper 20 clamps the drill rod, then the first reversing valve 8 is switched to the lower position, the main pump oil drives the motor 18 to rotate reversely through the first reversing valve 8, at the moment, the rodless cavity oil port L has no pressure, the two control oil ports M, N of the fourth reversing valve 15 are communicated with the shuttle valve oil port A, the pressure is equal to the shuttle valve oil port A, so that the pressure of the upper cavity and the lower cavity of the fourth reversing valve 15 is balanced and still at the middle position, so that the hydraulic chuck 21 and the gripper 20 clamp the drill rod at the same time, and the last drill rod clamped by the hydraulic chuck 21 is driven by the hydraulic motor 18 to rotate reversely, so that.
At this time, the oil output from the port a of the first directional control valve 8 simultaneously enters the internal control oil port K1 through the internal oil passage, so that the double control balance valve 16 is opened, and therefore the feed cylinder 19 is in a floating state, and the feed cylinder 19 automatically retreats while tripping, thereby avoiding damaging the trip. After the front and rear drill rods are tripped, the first reversing valve 8 is switched to the middle position, and the hydraulic motor 18 stops reversing; then the second reversing valve 12 is switched to the lower position, oil entering from the oil inlet P1 is converged at the position P of the second reversing valve by the first reversing valve 8 and oil entering from the oil inlet P2 by the sequence valve 10 and jointly flows through the second reversing valve 12 to enter a rodless cavity of the feeding oil cylinder 19, and simultaneously reaches an internal control oil port K2 to open the double control balance valve 16, so that the feeding oil cylinder 19 drives the hydraulic chuck and the last drill rod clamped by the hydraulic chuck to retreat; in the process, the upper cavity and the lower cavity of the fourth reversing valve 15 are balanced in stress and still in a middle position; that is, the hydraulic chuck 21 holds the last drill rod and retreats, and the holder 20 clamps the front drill rod without sliding.
When the feeding cylinder 19 retreats to the maximum stroke, the second reversing valve 12 is cut back to the middle position, the feeding cylinder 19 stops advancing, a drill rod is additionally arranged at the tail of a drill rod clamped by a clamp in front of the hydraulic chuck 21, the first reversing valve 8 is switched to the upper position, main pump oil passes through the first reversing valve 8 to drive the hydraulic motor 18 to rotate forward, the last drill rod clamped by the hydraulic chuck 21 is separated from the front drill rod, the hydraulic motor 18 can drive the last drill rod to idle under low pressure, meanwhile, the oil reaching the working oil port B1 reaches the rodless chamber oil port L of the differential cylinder 17 through the internal oil passage, at the same time, two control oil ports M, N of the fourth reversing valve 15 are both communicated with the shuttle valve oil outlet A, namely, the control oil port M is equal to the shuttle valve A pressure, the pressure reaching the rodless chamber oil port L is lower, the differential oil cylinder 17 cannot be pushed to move downward, therefore, the hydraulic chuck 21 and the differential oil cylinder 20 clamp the drill rod simultaneously, the second reversing valve 12 is switched to the upper position, the auxiliary pump opens the sequence valve 10, the sequence valve flows through the second reversing valve 12, the balance valve, the balancing valve, the working oil cylinder 17, the hydraulic cylinder reaches the working oil port B, the hydraulic cylinder 19 is driven by the hydraulic cylinder clamp, the hydraulic cylinder clamp is loosened, the hydraulic cylinder 19 is driven by the hydraulic cylinder clamp, the hydraulic cylinder clamp hydraulic cylinder 19, the hydraulic cylinder clamp is loosened, the hydraulic cylinder 19 is controlled by the hydraulic cylinder clamp, the hydraulic cylinder clamp hydraulic cylinder 19, the hydraulic cylinder 12 is loosened, the hydraulic cylinder 12, the hydraulic.
When the drill bit enters a drill pulling state, the third reversing valve 14 is switched to a lower straight line conducting position, then the first reversing valve 8 is switched to be positioned at an upper position, main pump oil passes through the first reversing valve 8 to drive the hydraulic motor 18 to rotate forwards, meanwhile, the oil reaching the working oil port B1 reaches the rodless cavity oil port L of the differential oil cylinder 17 through an internal oil duct, a cylinder rod of the differential oil cylinder 17 moves downwards to push the fourth reversing valve 15 to reverse to the upper position, pressure oil at the shuttle valve oil outlet A respectively reaches the loosening oil port B3 and the disc oil port A4 through the fourth reversing valve 15 to loosen the clamp holder 20, the chuck 21 clamps the drill rod to start rotating forwards, then the second reversing valve 12 is switched to a lower position, the auxiliary pump oil opens the sequence valve 10, flows through the second reversing valve 12 to the working oil port A2 in sequence and enters the rodless cavity of the feed oil cylinder 19, and simultaneously, high-pressure oil discharged through the second reversing valve 12 reaches the internal control oil port K2 to open the balance valve 16 to enable the feed oil cylinder 19 to withdraw the rotary.
When the feeding oil cylinder 19 retreats to the maximum stroke, the second reversing valve 12 is switched to the middle position, the feeding oil cylinder 19 stops retreating, meanwhile, the first reversing valve 8 is switched back to the middle position, the hydraulic motor 18 stops rotating, at the moment, the pressure of the rodless cavity oil port L of the differential oil cylinder 17 is released, the fourth reversing valve 15 automatically returns to the middle position under the action of an internal return spring, the gripper 20 clamps a drill rod, then the first reversing valve 8 is switched to the lower position, the hydraulic motor 18 rotates reversely, the last drill rod clamped by the hydraulic chuck 21 is driven by the hydraulic motor 18 to rotate reversely, so that the drill rod and the previous drill rod can be tripped, oil output by the first reversing valve 8 enters an internal control oil port K1 through an internal oil duct, the double-control balance valve 16 is opened, the feeding oil cylinder 19 is in a floating state, the feeding oil cylinder 19 retreats automatically while tripping, and the phenomenon that the tripping is avoided.
When the last section of drill rod is completely disconnected, the first reversing valve 8 is switched to the middle position, and the hydraulic control motor 18 stops rotating; switching the second reversing valve 12 to an upper position, wherein oil entering from an oil inlet P1 passes through the first reversing valve 8, is converged with oil entering from an oil inlet P2 through the sequence valve 10, flows through the second reversing valve 12 and the double-control balance valve 16 together, and enters a rod cavity of the feeding oil cylinder 19 through a working oil port B2; meanwhile, the high-pressure oil discharged by the second reversing valve 12 flows through the third reversing valve 14 at the lower position to reach the control oil port N of the fourth reversing valve, so that the fourth reversing valve 15 is reversed to the lower position, and the oil in the hydraulic chuck 21 flows to the oil return port T2 through the fourth reversing valve 15 and is released by an oil return tank, so that the hydraulic chuck 21 loosens the drill rod; thereby leading the feed oil cylinder 19 to drive the hydraulic chuck to advance; when the feeding oil cylinder 19 advances to the maximum stroke, the drill pulling process is repeated, and the drill rods can be taken out in sequence.
While the embodiments of the invention have been described above, it is not intended to be limited to the details shown, or described, but rather to cover all modifications, which would come within the scope of the appended claims, and all changes which come within the meaning and range of equivalency of the art are therefore intended to be embraced therein.
Claims (10)
1. A multi-way reversing valve of a multifunctional underground drill rig comprises an oil inlet valve plate, a rotary valve plate, a shuttle valve plate, a feed valve plate and a switching valve plate which are sequentially connected; the oil inlet valve plate is provided with an oil inlet P1 and an oil return port T1 and is used for connecting a main pump and an oil tank of the underground drill rig; the rotary valve plate is used for connecting the oil inlet P1 and the oil return port T1 with a forward and reverse oil inlet of a hydraulic motor of the underground drill rig; the feeding valve plate is used for controlling the extension and retraction of the feeding oil cylinder; the method is characterized in that:
the switching valve plate comprises a third reversing valve, a fourth reversing valve, a differential oil cylinder and a one-way valve; a clamping oil port A3, a loosening oil port B3 and a chuck oil port A4 which are arranged on the valve plate;
the third reversing valve is a three-position six-way reversing valve, a port P of the third reversing valve is communicated with the clamping oil port A3 through an internal oil duct, ports P 'and P' of the third reversing valve are respectively correspondingly communicated with control oil ports M, N at two ends of the fourth reversing valve, a port A of the third reversing valve is communicated with a port A of a second reversing valve arranged in the feeding valve sheet, and a port B of the third reversing valve is communicated with a working oil port A1 arranged on the rotary valve sheet through the internal oil duct and the one-way valve; when the pressure of the working oil port A1 is higher than the pressure of the port B of the third reversing valve, the one-way valve is opened; the port P1' of the third reversing valve is communicated with the port B of the second reversing valve; the device is used for selecting the drill-tripping or drill-lowering working condition of the tunnel drilling machine and the adding position of the drill rod;
the fourth reversing valve is a three-position five-way hydraulic control reversing valve, a port P of the fourth reversing valve is communicated with a shuttle valve oil outlet A arranged in a shuttle valve sheet through an internal oil duct, a port A of the fourth reversing valve is communicated with a chuck oil port A4, and a port A' and a port B of the fourth reversing valve are respectively correspondingly communicated with a clamping oil port A3 and a loosening oil port B3; the hydraulic chuck is used for controlling the actions of the clamp and the hydraulic chuck;
the differential oil cylinder is arranged at one end of a control oil port M of the fourth reversing valve, a rod cavity of the differential oil cylinder is communicated with the control oil port M, a rodless cavity oil port L of the differential oil cylinder is communicated with a working oil port B1 arranged on the rotary valve plate through an internal oil duct, and the fourth reversing valve is in a neutral balance state when the hydraulic motor rotates in a no-load forward mode.
2. The multi-purpose underground drill rig multi-way reversing valve of claim 1, wherein: the shuttle valve plate comprises a shuttle valve, a sequence valve and an oil inlet P2 for connecting an auxiliary pump of the tunnel drilling machine; two oil inlets S1 and S2 of the shuttle valve are respectively and correspondingly communicated with the oil inlets P1 and P2 through internal oil passages; the sequence valve is connected between the oil inlet P2 and the port P of the second reversing valve through an internal oil passage.
3. The multi-purpose underground drill rig multi-way reversing valve of claim 2, wherein: the one-way valve plate is further arranged between the feeding valve plate and the switching valve plate and comprises a double-control balance valve arranged in the valve plate and a working oil port B2 arranged on the valve plate, the port B of the second reversing valve is communicated with a working oil port B2 through the double-control balance valve and an internal oil duct, an internal control oil port K1 of the double-control balance valve is communicated with a working oil port A1 on the rotary valve plate through the internal oil duct, and an internal control oil port K2 of the double-control balance valve is communicated with a working oil port A2 on the feeding valve plate through the internal oil duct.
4. The multi-purpose underground drill rig multi-way reversing valve of claim 1, wherein: when the third reversing valve is in a middle position, P, P ' and P ' ports of the third reversing valve are mutually communicated, and A, B, P1 ' ports of the third reversing valve are respectively cut off; when the third reversing valve (14) is positioned at an upper position, the P port is cut off, the P ' port is communicated with the A port, and the P ' port is communicated with the B port and is communicated with the P1 ' port through a throttling groove arranged on the valve rod; when the third reversing valve (14) is in the lower position, the port P and the port B are cut off, the port P ' is communicated with the port P1 ', and the port P ' is communicated with the port A; oil discharged by the fourth reversing valve enters oil cavities at two ends of a valve rod of the fourth reversing valve through the third reversing valve in the middle position, and the fourth reversing valve (15) is in the middle position balance state under the action of equal oil pressure at two ends; the hydraulic chuck is used for realizing that the clamp and the hydraulic chuck are in a clamping state so as to install a drill rod in front of the hydraulic chuck.
5. The multi-purpose underground drill rig multi-way reversing valve of claim 1 or 4, wherein: when the fourth reversing valve is positioned at the middle position, the port P is respectively communicated with the port A and the port A', and the port B is communicated with the port T; when the fourth reversing valve is positioned at the upper position, the port P is respectively communicated with the port A and the port B, and the port A' is communicated with the port T; when the fourth direction-changing valve is at down position, its P port is communicated with A' port, and its A, B ports are communicated with T port.
6. The multi-purpose underground drill rig multi-way reversing valve of claim 1 or 3, wherein: the rotary valve plate comprises a first reversing valve and working oil ports A1 and B1 arranged on the surface of the valve plate; the first reversing valve is a three-position six-way reversing valve, a P port and a P 'port of the first reversing valve are communicated with each other and are communicated with the oil inlet P1 through an internal oil duct, a T port of the first reversing valve is communicated with the oil return port T1 through the internal oil duct, a A, B port of the first reversing valve is respectively communicated with the working oil ports A1 and B1 through the internal oil duct, and a P1' port of the first reversing valve is communicated with a P port of the second reversing valve through the internal oil duct; the working oil ports A1 and B1 are respectively used for connecting a reverse rotation oil inlet and a forward rotation oil inlet of a hydraulic motor of the underground drill rig.
7. The multi-purpose underground drill rig multi-way reversing valve of claim 6, wherein: when the first reversing valve is positioned at the middle position, the P port of the first reversing valve is communicated with the P1 ', the A, B ports of the first reversing valve are communicated with the T port, and the P' port of the first reversing valve is closed; when the first reversing valve is positioned at an upper position, the port P and the port P1 'are cut off, the port P' is communicated with the port B, and the port A is communicated with the port T; when the first change valve is at lower position, its P port and P1 'port are closed, its P' port and A port are communicated, and its B port and T port are communicated.
8. The multi-purpose underground drill rig multi-way reversing valve of claim 3, wherein: the feeding valve plate comprises the second reversing valve and a working oil port A2 arranged on the valve plate; the internal structure of the second reversing valve is completely the same as that of the first reversing valve, a port P and a port P 'are communicated with each other, a port T and a port P1' are respectively communicated with the oil return port T1 through an internal oil duct, and a port A is communicated with the working oil port A2 through an internal oil duct; the working oil port A2 is used for connecting a rodless cavity of the feeding oil cylinder.
9. The multi-purpose underground drill rig multi-way reversing valve of claim 7 or 8, wherein: the first reversing valve, the second reversing valve and the third reversing valve are respectively hydraulic control reversing valves, and a group of control oil ports are led out from two sides of the rotary valve plate, the feeding valve plate and the switching valve plate respectively and are respectively used for being connected with a pilot valve to control reversing of the reversing valves.
10. The multi-purpose underground drill rig multi-way reversing valve of claim 8, wherein: a relief valve is provided between port P of the second direction valve and the oil return port T1 to limit the oil pressure entering the second direction valve.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921967580.6U CN211039203U (en) | 2019-11-14 | 2019-11-14 | Multi-way reversing valve of multifunctional tunnel drilling machine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921967580.6U CN211039203U (en) | 2019-11-14 | 2019-11-14 | Multi-way reversing valve of multifunctional tunnel drilling machine |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110778557A (en) * | 2019-11-14 | 2020-02-11 | 锦州力特液压科技有限公司 | Multi-way reversing valve of multifunctional tunnel drilling machine |
| CN113847295A (en) * | 2021-10-18 | 2021-12-28 | 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 |
-
2019
- 2019-11-14 CN CN201921967580.6U patent/CN211039203U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110778557A (en) * | 2019-11-14 | 2020-02-11 | 锦州力特液压科技有限公司 | Multi-way reversing valve of multifunctional tunnel drilling machine |
| 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 |
| CN113847295A (en) * | 2021-10-18 | 2021-12-28 | 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 |
| 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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