CN218439986U - Multi-way valve for underground drill rig - Google Patents

Abstract

The utility model discloses a multi-way valve for a tunnel drilling machine, which comprises a valve body, wherein a large pump oil inlet, a small pump oil inlet and an oil return port are arranged on the valve body, a power head motor reversing valve connected between the large pump oil inlet and the oil return port and a push-pull oil cylinder reversing valve, a chuck oil cylinder reversing valve and a clamp holder reversing valve which are sequentially connected in series between the small pump oil inlet and the oil return port are arranged in the valve body; and a confluence assembly for converging the pressure oil flowing into the oil inlet of the large pump to the oil inlet of the small pump is also arranged in the valve body. According to the multi-way valve for the underground drill rig, pressure oil of a large pump oil inlet is introduced into a small pump oil inlet through the flow combining component in the valve body, flow combining is achieved, whether flow combining is conducted or not is selected through the power head motor reversing valve, the moving speed of a piston rod of a push-pull oil cylinder is adjusted according to working conditions, the structure is compact, the size is reduced, the weight is lightened, the number of hydraulic elements is reduced, and the operation reliability of the multi-way valve component is guaranteed.

Description

Multi-way valve for underground drill rig

Technical Field

The utility model belongs to the technical field of the multiple unit valve technique and specifically relates to a multiple unit valve for tunnel drilling machine is related to.

Background

The tunnel drilling machine is a drilling machine for drilling in an underground tunnel, and is mainly used for engineering construction of deep address exploration, gas drainage, water injection and drainage, ventilation and the like in the tunnel. The main structure is as follows: the unit head that is equipped with hydraulic chuck is connected with feed cylinder, and the holder comprises two semicircle slips, and a tile is fixed, and another slips can remove, and under the effect of dish spring, two slips compress tightly together, and its working method is: the multi-way valve is trained and transmitted by a handle to change direction, the power head rotates to enable a hydraulic chuck to clamp a drill rod to rotate, two slips of a water-through clamp holder are opened, the drill rod is loosened, the handle is pushed forward to change direction, and the power head moves forward to drill under the action of a push-pull oil cylinder; 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 in the stomach 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 opening of the chuck and the clamping and opening of the clamper are controlled by a control valve housing.

In order to control the operation of a power head motor, a push-pull oil cylinder, a chuck oil cylinder and a clamp holder, in the prior art, for example, the Chinese utility model patent with the publication number of CN201763715U discloses an integrated valve of a tunnel drilling machine, which comprises a shunting oil inlet valve group arranged at one end and an oil return valve group arranged at the other end, wherein a series-type overload reversing valve group, a common reversing valve group and a confluence reversing valve group are sequentially arranged between the shunting oil inlet valve group and the oil return valve group from left to right; the valve banks are communicated with each other through parallel channels, a middle channel, a low-pressure channel and an external pipeline which are arranged on the side face, so that a complete hydraulic control oil way is formed, the weight is reduced by 40%, the working pressure is improved by 50%, the allowable flow is increased by 58%, various performances of the underground drilling machine valve are obviously improved, and the application range is wide.

However, in the operation process of the integrated valve controlled drilling machine, the integrated valve does not have the function of integrated confluence, and in order to achieve the effect of fast and slow switching of the push-pull oil cylinder, a reversing valve is usually required to be arranged outside the integrated valve, and pressure oil entering the integrated valve is controlled through the reversing valve to achieve the function of speed switching.

Accordingly, there is a need for an improved multi-way valve for a tunnel boring machine in the prior art.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the defect that exists among the prior art, provide a compact structure in order to reduce occupation space, reduce weight and improve the multichannel valve for gallery rig of reliability.

In order to realize the technical effects, the utility model adopts the technical scheme that: a multi-way valve for a tunnel drilling machine comprises a valve body, wherein a large pump oil inlet, a small pump oil inlet and an oil return port are formed in the valve body, a power head motor reversing valve connected between the large pump oil inlet and the oil return port, and a push-pull oil cylinder reversing valve, a chuck oil cylinder reversing valve and a clamp reversing valve which are sequentially connected in series between the small pump oil inlet and the oil return port are arranged in the valve body; and a confluence assembly for converging the pressure oil flowing into the oil inlet of the large pump to the oil inlet of the small pump is further arranged in the valve body.

In the multi-way valve assembly for the underground drill rig in the technical scheme, a large pump oil inlet and a small pump oil inlet on a valve body are respectively used for connecting two hydraulic pumps, wherein the output power of the hydraulic pump (hereinafter referred to as a large pump) communicated with the large pump oil inlet is 60kw, the output power of the hydraulic pump (hereinafter referred to as a small pump) communicated with the small pump oil inlet is generally 12kw, and an oil return port on the valve body is used for being communicated with an oil tank; two control ports of the reversing valve of the power head motor are a power head control port A and a power head control port B respectively and are communicated with two working cavities of the power head motor respectively; similarly, two control ports of the reversing valve of the push-pull oil cylinder are a push-pull control port A and a push-pull control port B respectively and are communicated with a rod cavity and a rodless cavity of the push-pull oil cylinder respectively; two control ports of the chuck cylinder reversing valve are a chuck control port A and a chuck control port B respectively and are communicated with a rod cavity and a rodless cavity of the chuck cylinder respectively; the two control ports of the gripper reversing valve are a gripper control port A and a gripper control port B which are respectively communicated with the two working cavities of the gripper.

When the tunnel drilling machine operates, the large pump conveys pressure oil in the oil tank to an oil inlet of the large pump, the pressure oil enters the power head motor reversing valve to control the power head motor to rotate forwards or reversely, and the pressure oil in the power head motor reversing valve flows into the oil tank through an oil return port; because the push-pull oil cylinder reversing valve, the chuck oil cylinder reversing valve and the clamp reversing valve are connected in series, when the small pump runs, pressure oil in the oil tank is simultaneously conveyed to the push-pull oil cylinder reversing valve, the chuck oil cylinder reversing valve and the clamp reversing valve, so that the composite action of the push-pull oil cylinder, the chuck oil cylinder and the clamp is realized; when the reversing valve of the power head motor does not need to use pressure oil, the pressure oil conveyed to the oil inlet of the large pump by the large pump is conveyed to the oil inlet of the small pump by the confluence assembly, and at the moment, the pressure oil is converged with the pressure oil at the oil inlet of the small pump and enters the reversing valve of the push-pull oil cylinder to control the piston rod of the push-pull oil cylinder to move forwards and backwards more quickly.

Compared with the prior art at the outside switching-over valve that sets up of multiple unit valve subassembly, the utility model discloses a pressure oil that the big pump transmission was confluent with the pressure oil of little pump transmission at the inside confluence subassembly that sets up of valve body, on the basis that satisfies push-and-pull hydro-cylinder piston rod speed switching adjustment, make a whole set of multiple unit valve control system structure compacter, occupation space is littleer, shorten the tube coupling length simultaneously, the whole weight of multiple unit valve has been reduced, make the integrated level higher, and because the confluence subassembly sets up inside the valve body, the steady operation of confluence subassembly has been guaranteed, the reliability has been improved, avoid the confluence subassembly to suffer destruction, guarantee its steady operation, switch over at a slow speed with the realization push-and-pull hydro-cylinder piston rod translation rate.

Preferably, the confluence assembly comprises a confluence pipeline, two ends of the confluence pipeline are respectively communicated with the oil inlet of the big pump and the oil inlet of the small pump, and the confluence pipeline is provided with a one-way valve.

Preferably, through adopting above-mentioned technical scheme, utilize the confluence pipeline with big pump oil inlet and little pump oil inlet intercommunication, the circulation direction of pressure oil in the confluence pipeline is restricted through the check valve on the confluence pipeline simultaneously for pressure oil can only realize converging from big pump oil inlet to little pump oil inlet intercommunication, avoids the pressure oil flow direction big pump oil inlet that little pump oil inlet got into.

Preferably, an overflow valve communicated between the oil inlet of the big pump and the oil return port is arranged in the valve body so as to limit the oil inlet pressure of the oil inlet of the big pump.

By adopting the technical scheme, the overflow valve is utilized to limit the oil inlet pressure of the oil inlet of the large pump, so that the oil pressure in the valve body is stabilized within a safe pressure range, and after the pressure exceeds the set pressure of the overflow valve, the pressure oil exceeding the safe pressure part flows back to the oil tank through the oil return port, so that the safe and stable operation of the multi-way valve is ensured.

Preferably, the valve body is provided with a large pump pressure measuring port and a small pump pressure measuring port which are respectively communicated with the large pump oil inlet and the small pump oil inlet, and the large pump pressure measuring port and the small pump pressure measuring port are respectively used for connecting the first hydraulic pump and the second hydraulic pump.

Through adopting above-mentioned technical scheme, utilize and connect first hydraulic pump and second hydraulic pump respectively at big pump pressure measurement mouth and little pump pressure measurement mouth to detect the pressure oil pressure that detects big pump oil inlet and little pump oil inlet respectively, make things convenient for operating personnel to judge and carry out relevant operation afterwards.

Preferably, the valve body is further provided with a first oil drainage port and a second oil drainage port which are communicated with an outlet of the push-pull oil cylinder reversing valve and an outlet of the chuck oil cylinder reversing valve respectively.

By adopting the technical scheme, the first oil drainage port and the second oil drainage port are utilized to introduce the oil drainage of other hydraulic control elements into the multi-way valve, and the oil drainage flows back to the oil tank after confluence, so that the multi-way valve is more compact in structure and beneficial to saving space.

Preferably, the valve body comprises a power head motor control valve casing, a push-pull oil cylinder control valve casing, a chuck oil cylinder control valve casing and a clamp control valve casing which are sequentially connected, and the power head motor reversing valve, the push-pull oil cylinder reversing valve, the chuck oil cylinder reversing valve and the clamp reversing valve are respectively arranged on the power head motor control valve casing, the push-pull oil cylinder control valve casing, the chuck oil cylinder control valve casing and the clamp control valve casing.

Through adopting above-mentioned technical scheme, set up power head motor switching-over valve, push-and-pull hydro-cylinder switching-over valve, chuck hydro-cylinder switching-over valve and holder switching-over valve respectively in the power head motor control valve casing that corresponds, push-and-pull hydro-cylinder control valve casing, chuck hydro-cylinder control valve casing and holder control valve casing, make things convenient for the equipment production of this multiple unit valve, be convenient for the troubleshooting trouble of being convenient for simultaneously to after the multiple unit valve breaks down, can in time find the hydraulic component that produces the trouble, improve gallery rig's maintenance work efficiency.

Preferably, the unit head motor control valve casing is back to one side of push-and-pull oil cylinder control valve casing is provided with big pump control valve casing, be provided with little pump control valve casing between unit head motor control valve casing and the push-and-pull oil cylinder control valve casing, big pump oil inlet with the oil return opening set up in on the big pump control valve casing, little pump oil inlet set up in on the little pump control valve casing.

By adopting the technical scheme, the multi-way valve is convenient to assemble and produce, and meanwhile, the oil inlet fault of the large pump, the oil inlet fault of the small pump and the oil return fault of the multi-way valve can be conveniently checked, so that the multi-way valve can safely and stably operate.

Preferably, the large pump control valve casing, the power head motor control valve casing, the small pump control valve casing, the push-pull cylinder control valve casing, the chuck cylinder control valve casing and the gripper control valve casing are connected by a double-threaded screw and nuts in threaded fit with both ends of the double-threaded screw.

Through adopting above-mentioned technical scheme, make things convenient for dismantling between a plurality of hydraulic component of valve body to be connected to this multiple unit valve's fast assembly, simultaneously, partial hydraulic component among them damages the back, can change fast, with the normal steady operation that guarantees the gallery and creeps into.

Preferably, the power head motor reversing valve, the push-pull oil cylinder reversing valve, the chuck oil cylinder reversing valve and the gripper reversing valve are all three-way four-position reversing valves.

By adopting the technical scheme, the power head motor reversing valve, the push-pull oil cylinder reversing valve, the chuck oil cylinder reversing valve and the clamp reversing valve are conveniently operated, so that the rapid control is realized.

Preferably, the valve body is provided with a first reserved port and a second reserved port which are respectively communicated with the two power head control ports of the power head motor reversing valve.

By adopting the technical scheme, the first reserved port and the second reserved port are utilized to facilitate the upgrading operation of a subsequent hydraulic system, so that other hydraulic elements can be connected according to the requirement of a hydraulic control system on the basis of the original multi-way valve, and the connection of the hydraulic elements and the multi-way valve is completed.

To sum up, the utility model discloses multichannel valve for gallery rig compares with prior art, closes the subassembly through the valve body and introduces the little pump oil inlet with the pressure oil of big pump oil inlet, realizes the confluence to whether utilize unit head motor switching-over valve to select to converge, with the removal rate of adjusting push-and-pull hydro-cylinder piston rod according to operating mode needs, make the structure compacter in order to reduce the volume and lighten weight, and reduce hydraulic component quantity, and guarantee the reliability of multichannel valve subassembly operation.

Drawings

Fig. 1 is a front view of the present invention;

fig. 2 is a front view of the present invention;

fig. 3 is a side view of the present invention;

fig. 4 is a schematic diagram of the oil circuit of the present invention;

in the figure: 100. the hydraulic control system comprises a valve body, 101, a large pump oil inlet, 102, a small pump oil inlet, 103, an oil return port, 104, a large pump pressure measuring port, 105, a small pump pressure measuring port, 106, a first oil drainage port, 107, a second oil drainage port, 108, a first reserved port, 109, a second reserved port, 200, a power head motor reversing valve, 201, a power head control port A,202, a power head control port B,300, a chuck cylinder reversing valve, 301, a chuck control port A,302, a chuck control port B,400, a clamp reversing valve, 401, a clamp control port A,402, a clamp control port B,500, a converging pipeline, 600, a one-way valve, 700, an overflow valve, 800, a power head valve casing motor control port, 900, a chuck cylinder control port, 110, a clamp control valve casing, 120, a large pump control valve casing, 130, a small pump control valve casing, 140, a double-headed screw, 150, a nut, 160, a push-pull cylinder reversing valve, 161, 162, push-pull control port B,170 and push-pull cylinder control port.

Detailed Description

The following description will further describe embodiments of the present invention with reference to the accompanying drawings and examples. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.

As shown in fig. 1-4, the utility model discloses a multi-way valve for gallery drilling machine, including valve body 100, be provided with big pump oil inlet 101, little pump oil inlet 102 and oil return opening 103 on the valve body 100, wherein big pump oil inlet 101 is used for connecting the hydraulic pump (hereinafter referred to as "big pump") that output is 60kw, little pump oil inlet 102 is used for connecting the hydraulic pump (hereinafter referred to as "little pump") that output is 12kw, oil return opening 103 is used for connecting the oil tank, when this multi-way valve uses, big pump and little pump are carried the pressure oil in the oil tank to the valve body 100 in through big pump oil inlet 101 and little pump oil inlet 102 respectively, and the pressure oil after finishing using flows back to the oil tank in through oil return opening 103.

The valve body 100 is internally provided with a power head motor reversing valve 200, a push-pull oil cylinder reversing valve 160, a chuck oil cylinder reversing valve 300 and a clamp reversing valve 400, and the power head motor reversing valve 200, the push-pull oil cylinder reversing valve 160, the chuck oil cylinder reversing valve 300 and the clamp reversing valve 400 are all three-way four-position reversing valves; the push-pull cylinder directional valve 160, the chuck cylinder directional valve 300, and the gripper directional valve 400 are connected in series to form a serial line, and the power head motor directional valve 200 is connected in parallel to the serial line. The interface connection structure of the four three-way four-position reversing valves is as follows:

an inlet of a power head motor reversing valve 200 is communicated with a large pump oil inlet 101, an outlet of the power head motor reversing valve is communicated with an oil return port 103, and two control ports are a power head control port A201 and a power head control port B202 which are respectively communicated with two working cavities of a power head motor; an inlet of a reversing valve 160 of the push-pull oil cylinder is communicated with an oil inlet 102 of the small pump, an outlet of the reversing valve is communicated with an oil return port 103, and two control ports are a push-pull control port A161 and a push-pull control port B162 which are respectively communicated with a rod cavity and a rodless cavity of the push-pull oil cylinder; an oil inlet of the chuck cylinder reversing valve 300 is communicated with an oil inlet 102 of the small pump, an outlet of the chuck cylinder reversing valve is communicated with an oil return port 103, and two control ports are a chuck control port A301 and a chuck control port B302 which are respectively communicated with a rod cavity and a rodless cavity of the chuck cylinder; the inlet of the gripper reversing valve 400 is communicated with the oil inlet 102 of the small pump, the outlet of the gripper reversing valve is communicated with the oil return port 103, and the two control ports are respectively a gripper control port A401 and a gripper control port B402 which are respectively communicated with the two working cavities of the gripper.

The valve body 100 is also internally provided with a confluence assembly, the confluence assembly is used for converging pressure oil flowing into the large pump oil inlet 101 to the small pump oil inlet 102, the confluence assembly comprises a confluence pipeline 500, two ends of the confluence pipeline 500 are respectively communicated with the large pump oil inlet 101 and the small pump oil inlet 102, the confluence pipeline 500 is provided with a one-way valve 600, an inlet of the one-way valve 600 is adjacent to the large pump oil inlet 101, and an outlet of the one-way valve is adjacent to the small pump oil inlet 102.

When the multi-way valve is used for the underground drill rig, the large pump conveys pressure oil in the oil tank to the oil inlet 101 of the large pump, and the pressure oil at the oil inlet 101 of the large pump drives a power head motor to rotate forwards or turn over through the power head control port A201 and the power head control port B202; the small pump conveys pressure oil in the oil tank to the oil inlet 102 of the small pump, the pressure oil drives the piston rod of the push-pull oil cylinder to move forwards or backwards through the push-pull control port A161 and the push-pull control port B162, similarly, the pressure oil drives the piston rod of the chuck oil cylinder to move forwards or backwards through the chuck control port A301 and the chuck control port B302, and the pressure oil drives the clamp to move through the clamp control port A401 and the clamp control port B402. When the valve core of the power head motor reversing valve 200 moves to the central position, namely the inlet of the power head motor reversing valve is communicated with the outlet of the power head motor reversing valve, and the power head control port A201 and the power head control port B202 are closed, the power head motor reversing valve 200 does not use pressure oil at the large pump oil inlet 101 at this time, the large pump keeps a running state, the pressure oil in the oil tank flows along the confluence pipeline 500 after passing through the large pump oil inlet 101, the pressure oil is prevented from flowing backwards or flowing backwards by the check valve 600, so that the pressure oil entering at the large pump oil inlet 101 is converged with the pressure oil at the small pump oil inlet 102, confluence is completed, the piston rod of the push-pull oil cylinder is controlled to move forwards and backwards more quickly by the push-pull control port A161 and the push-pull control port B162, and the movement speed of the piston rod of the push-pull oil cylinder can be increased by confluence of the two pressure oils. Therefore, when the device runs, the power head motor reversing valve 200 can control whether pressure oil at the large pump oil inlet 101 and the small pump oil inlet 102 is converged or not so as to control the movement speed of the piston rod of the push-pull oil cylinder, realize high-speed and low-speed switching and meet the use requirements of different working conditions.

Compared with the structure and the mode that set up the switching-over valve outside the multiple unit valve in order to realize speed switching among the prior art, the utility model discloses in, the pressure oil of big pump oil inlet 101 department and the pressure oil of little pump oil inlet 102 department are joined together through the confluence subassembly that sets up in valve body 100 inside, carry out the speeding with the motion to push-and-pull oil cylinder piston rod, whether the confluence is carried out to the unit head motor switching-over valve 200 selection that sets up in valve body 100 through the operation, so that when the system operation, the operator can realize the speed governing function of push-and-pull oil cylinder piston rod according to the operating mode needs of difference, and compare in prior art, this multichannel control system structure for tunnel boring machine is compacter, the volume reduces to original 50%, the quantity of hydraulic component has been reduced simultaneously, in order to alleviate hydraulic system's weight, it is about 50kg to actually subtract heavy, make a whole set of hydraulic system highly integrated, this multiple unit valve operational reliability has been promoted by a wide margin.

Specifically, the utility model discloses the theory of operation of multiple unit valve as follows:

(1) When the valve core of the power head motor reversing valve 200 is reversed leftwards, pressure oil entering from the oil inlet 101 of the large pump enters a working cavity at one end of the power head motor through a power head control port A201, meanwhile, pressure oil in the working cavity at the other end of the power head motor enters a power head control port B202 and returns to an oil tank through an oil return port 103, and the power head motor rotates forwards; when the valve core of the power head motor reversing valve 200 is reversed to the right, pressure oil entering from the oil inlet 101 of the large pump enters a working cavity at one end of the power head motor through a power head control port B202, meanwhile, pressure oil in the working cavity at the other end of the power head motor enters a power head control port A201 and returns to an oil tank through an oil return port 103, and the power head motor rotates reversely; when the valve core of the power head motor reversing valve 200 moves to the central position, the inlet of the power head motor reversing valve is closed, meanwhile, the channels between the power head control port A201 and the power head control port B202 are closed, the working cavities at the two ends of the power head motor are closed and are in a static state, and at the moment, the power head motor reversing valve 200 does not use pressure oil of the large pump oil inlet 101;

(2) When the valve core of the reversing valve 160 of the push-pull oil cylinder is reversed to the left, pressure oil entering from the oil inlet 102 of the small pump enters a rod cavity of the push-pull oil cylinder through the push-pull control port A161 to push a piston rod of the push-pull oil cylinder to retreat and perform retreating action, and meanwhile, the pressure oil in a rodless cavity of the push-pull oil cylinder returns to an oil tank from an oil return port 103 after entering a push-pull control port B162; when the valve core of the reversing valve 160 of the push-pull oil cylinder is reversed to the right, pressure oil entering from the oil inlet 102 of the small pump enters a rodless cavity of the push-pull oil cylinder through the push-pull control port B162, a piston rod of the push-pull oil cylinder is pushed to extend out to move forward, and meanwhile, the pressure oil in the rodless cavity of the push-pull oil cylinder returns to an oil tank from the oil return port 103 after entering the push-pull control port A161; when the valve core of the reversing valve 160 of the push-pull oil cylinder moves to the central position, the inlet is closed, the channel between the push-pull control port A161 and the push-pull control port B162 is closed, the rod cavity and the rodless cavity of the push-pull oil cylinder are closed, and the push-pull oil cylinder is in a static state, namely the push-pull oil cylinder of the execution element does not act;

(3) When the valve core of the chuck oil cylinder reversing valve 300 is reversed leftwards, pressure oil entering from the oil inlet 102 of the small pump enters a rod cavity of the chuck oil cylinder through a chuck control port A301, a piston rod of the chuck oil cylinder is pushed to retreat to do retreating action, and meanwhile, the pressure oil in a rodless cavity of the chuck oil cylinder returns to an oil tank from an oil return port 103 after entering a chuck control port B302; when the valve core of the chuck oil cylinder reversing valve 300 is reversed to the right, pressure oil entering from the oil inlet 102 of the small pump enters a rodless cavity of the chuck oil cylinder through a chuck control port B302, a piston rod of the chuck oil cylinder is pushed to extend out to move forward, and meanwhile, the pressure oil in the rodless cavity of the chuck oil cylinder returns to an oil tank from an oil return port 103 after entering a chuck control port A301; when the valve core of the chuck cylinder reversing valve 300 moves to the central position, the inlet of the valve core is closed, meanwhile, the channel between the chuck control port A301 and the chuck control port B302 is closed, the rod cavity and the rodless cavity of the chuck cylinder are closed, and the chuck cylinder is in a static state, namely, the executing element does not act;

(4) When the valve core of the gripper reversing valve 400 is reversed leftwards, pressure oil entering from the oil inlet 102 of the slave pump enters a working cavity at one end of the gripper through a gripper control port A401, meanwhile, pressure oil in the working cavity at the other end of the gripper enters a gripper control port B402 and returns to an oil tank through an oil return port 103, and the gripper performs clamping action; when the valve core of the gripper reversing valve 400 is reversed to the right, pressure oil entering from the oil inlet 101 of the large pump enters a working cavity at one end of the gripper through a gripper control port B402, meanwhile, pressure oil in the working cavity at the other end of the gripper enters a gripper control port A401 and returns to an oil tank through an oil return port 103, and the gripper performs loosening motion; when the valve core of the gripper reversing valve 400 moves to the central position, the inlet of the valve core is closed, meanwhile, the channels between the gripper control port A401 and the gripper control port B402 are closed, the working chambers at the two ends of the gripper are closed and are in a static state, namely, the gripper of the executing element does not act;

(5) When the valve core of the power head motor reversing valve 200 is in the central position, that is, the power head motor reversing valve 200 does not use the pressure oil of the large pump oil inlet 101, if the valve core of the push-pull oil cylinder reversing valve 160 is reversed left or right at this time, the pressure oil at the large pump oil inlet 101 does not enter the inlet of the power head motor reversing valve 200, but flows along the pipeline of the confluence pipeline 500, and after passing through the one-way valve 600, the pressure oil is converged with the pressure oil at the small pump oil inlet 102, after the two pressure oils are converged, the pressure oil enters the rod cavity (or rodless cavity) of the push-pull oil cylinder through the inlet of the push-pull oil cylinder reversing valve 160, so as to push the piston rod of the push-pull oil cylinder to move rapidly, that is, the forward (or backward) speed of the piston rod of the execution element push-pull oil cylinder is changed, so as to meet the requirements of different working conditions (mainly, during drilling or drilling, the two pressure oils are converged, so as to accelerate the forward and backward speeds of the piston rod of the push-pull oil cylinder, so as to improve the drilling and drilling efficiency, while the two pressure oils are normally shunted, so as to ensure the normal speed of the piston rod of the push-pull oil cylinder is pushed.

The overflow valve 700 is further arranged in the valve body 100, the inlet of the overflow valve 700 is communicated with the large pump oil inlet 101, the outlet of the overflow valve 700 is communicated with the oil return port 103, the oil pressure in the valve body 100 can be limited through the overflow valve 700 and is stabilized within a set safe pressure range of the overflow valve 700, when the pressure exceeds the set pressure, part of pressure oil flows to an oil tank through the oil return port 103 in the pressure oil entering from the large pump oil inlet 101, and therefore the oil pressure in the valve body 100 is reduced, and safe and stable operation of the multi-way valve is guaranteed.

An overflow valve 700 communicated between the large pump oil inlet 101 and the oil return opening 103 is arranged in the valve body 100 to limit the oil inlet pressure of the large pump oil inlet 101.

The valve body 100 is also provided with a large pump pressure measuring port 104 and a small pump pressure measuring port 105, wherein the large pump pressure measuring port 104 is communicated with the large pump oil inlet 101 and is used for connecting a first hydraulic gauge to measure the oil pressure entering the large pump oil inlet 101; the small pump pressure measuring port 105 is communicated with the small pump oil inlet 102 and is used for being connected with a second hydraulic gauge so as to measure oil pressure entering the small pump oil inlet 102. In the operation process of the multi-way valve, by measuring the oil pressure at the oil inlet 101 of the large pump and the oil pressure at the oil inlet 102 of the small pump, an operator can conveniently observe the oil pressure condition in the valve body 100 to perform corresponding operation (for example, when the oil pressure at the oil inlet 102 of the small pump is too small, the output power of the small pump is increased), and the safe and stable operation of the underground drill rig is ensured.

The valve body 100 is further provided with a first oil drainage port 106 and a second oil drainage port 107, wherein the first oil drainage port 106 is communicated with an outlet of the push-pull oil cylinder reversing valve 160, and the second oil drainage port 107 is communicated with an outlet of the chuck oil cylinder reversing valve 300.

After the design is adopted, the oil drainage of other hydraulic control elements can be introduced into the valve body 100 of the multi-way valve through the first oil drainage port 106 and the second oil drainage port 107, so that the oil drainage flows into an oil tank through the oil return port 103 after confluence, and thus, the multi-way valve hydraulic system is more compact in structure and saves space.

The valve body 100 is further provided with a first reserved port 108 communicated with the power head control port A201 and a second reserved port 109 communicated with the power head control port B202. The first reserved port 108 and the second reserved port 109 are arranged to facilitate upgrading of the hydraulic system, access of the multi-way valve to other execution elements is facilitated, and the action of accessing the execution elements is controlled through the power head motor reversing valve 200.

The main structure of the valve body 100 comprises a large pump control valve casing 120, a power head motor control valve casing 800, a small pump control valve casing 130, a push-pull oil cylinder control valve casing 170, a chuck oil cylinder control valve casing 900 and a clamp control valve casing 110 which are connected in sequence; accordingly, the power head motor reversing valve 200 is disposed on the power head motor control valve housing 800, the push-pull cylinder reversing valve 160 is disposed on the push-pull cylinder control valve housing 170, the chuck cylinder reversing valve 300 is disposed on the chuck cylinder control valve housing 900, and the gripper reversing valve 400 is disposed on the gripper control valve housing 110, respectively.

Big pump control valve casing 120, unit head motor control valve casing 800, little pump control valve casing 130, push-and-pull cylinder control valve casing 170, chuck cylinder control valve casing 900 and holder control valve casing 110's inboard is run through there is double-threaded screw 140, double-threaded screw 140's the equal screw-thread fit in both ends has nut 150, nut 150 through in the double-threaded screw 140 both ends rotates, reduce the interval of both ends nut 150, in order to control valve casing 120 with big pump, unit head motor control valve casing 800, little pump control valve casing 130, push-and-pull cylinder control valve casing 170, chuck cylinder control valve casing 900 and holder control valve casing 110 press from both sides tight fit.

Big pump oil inlet 101, oil return opening 103 and big pump pressure measurement port 104 all set up on big pump control valve casing 120, little pump oil inlet 102 and little pump pressure measurement port 105 all set up on little pump control valve casing 130, and first reservation mouth 108 and second reservation mouth 109 set up respectively in the both ends of unit head motor switching-over valve 200, and first draining port 106 and second draining port 107 set up respectively on push-and-pull cylinder control valve casing 170 and chuck cylinder control valve casing 900.

Through adopting above-mentioned structure, big pump control valve casing 120, unit head motor control valve casing 800, little pump control valve casing 130, push-and-pull oil cylinder control valve casing 170, chuck cylinder control valve casing 900 and holder control valve casing 110 realize convenient the connection of dismantling through screw-thread fit's double-end screw 140 and nut 150, when convenient the equipment concatenation, be convenient for troubleshooting, so that at the actual motion in-process, in time look for the part of department damage in this multiple unit valve, and dismantle fast and change the damage part, guarantee the work efficiency of gallery rig operation when reducing cost of maintenance.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the technical principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.

Claims (10)

1. The utility model provides a multiple unit valve for tunnel drilling machine, includes valve body (100), be provided with big pump oil inlet (101), little pump oil inlet (102) and oil return opening (103) on valve body (100), its characterized in that:

a power head motor reversing valve (200) connected between the large pump oil inlet (101) and the oil return opening (103) and a push-pull oil cylinder reversing valve (160), a chuck oil cylinder reversing valve (300) and a clamp reversing valve (400) which are sequentially connected in series between the small pump oil inlet (102) and the oil return opening (103) are arranged in the valve body (100);

and a converging assembly for converging the pressure oil flowing into the large pump oil inlet (101) into the small pump oil inlet (102) is also arranged in the valve body (100).

2. The multi-way valve for an underground boring machine of claim 1, wherein: the confluence assembly comprises a confluence pipeline (500) with two ends respectively communicated with the big pump oil inlet (101) and the small pump oil inlet (102), and a one-way valve (600) is arranged on the confluence pipeline (500).

3. The multi-way valve for an underground boring machine of claim 1, wherein: an overflow valve (700) communicated between the big pump oil inlet (101) and the oil return port (103) is arranged in the valve body (100) to limit the oil inlet pressure of the big pump oil inlet (101).

4. The multi-way valve for an underground boring machine of claim 1, wherein: the hydraulic control valve is characterized in that a large pump pressure measuring port (104) and a small pump pressure measuring port (105) which are communicated with the large pump oil inlet (101) and the small pump oil inlet (102) respectively are arranged on the valve body (100), and the large pump pressure measuring port (104) and the small pump pressure measuring port (105) are used for being connected with a first hydraulic pump and a second hydraulic pump respectively.

5. The multi-way valve for an underground boring machine of claim 1, wherein: and the valve body (100) is also provided with a first oil drainage port (106) and a second oil drainage port (107) which are respectively communicated with the outlet of the push-pull oil cylinder reversing valve (160) and the outlet of the chuck oil cylinder reversing valve (300).

6. The multi-way valve for an underground boring machine of claim 1, wherein: the valve body (100) comprises a power head motor control valve casing (800), a push-pull oil cylinder control valve casing (170), a chuck oil cylinder control valve casing (900) and a clamp holder control valve casing (110) which are sequentially connected, wherein the power head motor reversing valve (200), the push-pull oil cylinder reversing valve (160), the chuck oil cylinder reversing valve (300) and the clamp holder reversing valve (400) are respectively arranged on the power head motor control valve casing (800), the push-pull oil cylinder control valve casing (170), the chuck oil cylinder control valve casing (900) and the clamp holder control valve casing (110).

7. The multi-way valve for an underground boring machine of claim 6, wherein: one side of unit head motor control valve casing (800) back to push-and-pull oil cylinder control valve casing (170) is provided with big pump control valve casing (120), be provided with between unit head motor control valve casing (800) and push-and-pull oil cylinder control valve casing (170) little pump control valve casing (130), big pump oil inlet (101) with oil return opening (103) set up in on big pump control valve casing (120), little pump oil inlet (102) set up in on little pump control valve casing (130).

8. The multi-way valve for an underground boring machine of claim 7, wherein: the large pump control valve casing (120), the power head motor control valve casing (800), the small pump control valve casing (130), the push-pull oil cylinder control valve casing (170), the chuck oil cylinder control valve casing (900) and the clamp control valve casing (110) are connected through a double-threaded screw (140) and nuts (150) in threaded fit with two ends of the double-threaded screw (140).

9. The multi-way valve for an underground boring machine of claim 1, wherein: the power head motor reversing valve (200), the push-pull oil cylinder reversing valve (160), the chuck oil cylinder reversing valve (300) and the clamp reversing valve (400) are all three-way four-position reversing valves.

10. The multi-way valve for an underground boring machine of claim 9, wherein: and a first reserved opening (108) and a second reserved opening (109) which are respectively communicated with the two power head control openings of the power head motor reversing valve (200) are formed in the valve body (100).

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