CN118328035A - Safety device for power head, control method and drilling machine - Google Patents
Safety device for power head, control method and drilling machine Download PDFInfo
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- CN118328035A CN118328035A CN202410303025.2A CN202410303025A CN118328035A CN 118328035 A CN118328035 A CN 118328035A CN 202410303025 A CN202410303025 A CN 202410303025A CN 118328035 A CN118328035 A CN 118328035A
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Abstract
The invention provides a safety device for a power head, a control method and a drilling machine, which comprise a quick-rotation multi-way valve, a quick-rotation handle, a rotary motor, a slow-rotation multi-way valve, a slow-rotation handle, a brake valve group and a safety interlocking valve group, wherein the safety interlocking valve group comprises five oil inlets, P1 and P2 are communicated with an oil outlet A, B of the quick-rotation handle, P3 and P4 are communicated with an oil outlet A, B of the slow-rotation handle, an oil inlet a is communicated with an outlet A of the brake valve group, outlet oil A1 and A2 are communicated with control oil ports a and b of the quick-rotation multi-way valve, oil outlets A3 and A4 are communicated with control oil ports a and b of the slow-rotation multi-way valve, and an oil outlet b is communicated with an oil inlet Br of the brake. Through the reasonable configuration of the safety interlocking valve group, according to the characteristics of the coal mine directional drilling machine in the construction, the rotation action of the power head and the bidirectional interlocking of the brake oil path are realized, and the problem that the brake is damaged due to the fact that the drilling machine is easy to operate by mistake, so that the construction efficiency is affected is solved.
Description
Technical Field
The invention relates to the field of hydraulic control systems, in particular to a safety device for a power head, a control method and a drilling machine.
Background
In the existing directional drilling machine for coal mines, a power head rotating device and a brake device are driven and controlled by a hydraulic system, a power head motor drives a rotating speed reducer to rotate, the rotating speed reducer is transmitted to a pinion of a rotating box body, and the rotating speed reducer is reduced through a gear box and finally transmitted to a main shaft. Usually, due to the limited space, the power head has a compact structure, and the brake is arranged at the pinion shaft of the power head rotating box body. Back-to-back arrangement is formed with the power head rotation motor speed reducer.
However, the transmission torque at the position has the functions of speed reduction and torque increase due to the fact that the transmission torque passes through the rotary speed reducer, the transmission torque is large, and the brake only needs to meet the reactive torque of the drill rod in the directional drilling construction process, so that the numerical value is small. If the brake is enlarged, a large waste is caused, so the braking torque of the brake is generally smaller, and the brake is generally a static brake, so that dynamic braking cannot be realized. The power head is easy to interfere with the action of the brake when rotating, and the driller needs to pay special attention during the operation process. The scheme adopts a mode of adding unidirectional locking, so that rotation is not performed in the working process of the brake, but the problem is not thoroughly solved, the misoperation phenomenon still exists, and the increasingly complex construction site requirements cannot be met.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a safety device for a power head, a control method and a drilling machine.
In order to solve the problems in the prior art, the invention discloses a safety device for a power head, which comprises: the oil tank T, a quick-rotation multi-way valve, a quick-rotation handle, a rotation motor, a slow-rotation multi-way valve, a slow-rotation handle, a brake valve group and a safety interlocking valve group which are respectively connected with the oil tank T; the safety interlocking valve group is provided with an oil inlet P1, an oil inlet P2, an oil inlet P3, an oil inlet P4 and an oil inlet a, and an oil outlet A1, an oil outlet A2, an oil outlet A3, an oil outlet A4 and an oil outlet b; the quick rotating handle and the slow rotating handle are respectively provided with an oil outlet A and an oil outlet B; the fast rotation multi-way valve and the slow rotation multi-way valve are respectively provided with a control oil port a and a control oil port b; the brake is provided with an oil inlet Br; the brake valve group is provided with an outlet A; an oil inlet P1 and an oil inlet P2 of the safety interlocking valve group are respectively connected with an oil outlet A and an oil outlet B of the quick rotating handle; an oil inlet P3 and an oil inlet P4 of the safety interlocking valve group are respectively connected with an oil outlet A and an oil outlet B of the slow rotation handle; an oil inlet a of the safety interlocking valve bank is connected with an outlet A of the brake valve bank; the oil outlet A1 and the oil outlet A2 of the safety interlocking valve group are respectively connected with a control oil port a and a control oil port b of the fast rotation multipath valve; the oil outlet A3 and the oil outlet A4 of the safety interlocking valve group are respectively connected with a control oil port a and a control oil port b of the slow rotation multipath valve; and an oil outlet b of the safety interlocking valve group is connected with an oil inlet Br of a brake, one end of a rotary motor is connected with the brake, and the other end of the rotary motor is respectively connected with a fast rotary multi-way valve and a slow rotary multi-way valve.
Further, the safety interlocking valve group is provided with a first two-position three-way reversing valve, a second two-position three-way reversing valve, a third two-position three-way reversing valve, a fourth two-position three-way reversing valve and a fifth two-position three-way reversing valve; each two-position three-way reversing valve is provided with a P port, an A port, an a port and a T port; the port P of the first two-position three-way reversing valve is connected with an oil inlet P1, and the port A is connected with an oil outlet A1; the P port of the second two-position three-way reversing valve is connected with an oil inlet P2, and an oil inlet a and an oil outlet A2; the port P of the third two-position three-way reversing valve is connected with an oil inlet P3, and the port A is connected with an oil outlet A3; the port P of the fourth two-position three-way reversing valve is connected with an oil inlet P4, and the port A is connected with an oil outlet A4; the P port of the fifth two-position three-way reversing valve is connected with an oil inlet a, and the A port is connected with an oil outlet b; the a ports of the first two-position three-way reversing valve, the second two-position three-way reversing valve, the third two-position three-way reversing valve and the fourth two-position three-way reversing valve are connected with each other and are commonly connected with the A port of the fifth two-position three-way reversing valve; the T port of each two-position three-way reversing valve is connected with an oil tank T.
Further, the safety interlocking valve group is also provided with a first shuttle valve, a second shuttle valve and a third shuttle valve; each shuttle valve is provided with a c port; one end of the first shuttle valve is connected with an A port of the first two-position three-way reversing valve, and the other end of the first shuttle valve is connected with an A port of the second two-position three-way reversing valve; one end of the second shuttle valve is connected with an A port of the third two-position three-way reversing valve, and the other end of the second shuttle valve is connected with an A port of the fourth two-position three-way reversing valve; one end of the third shuttle valve is connected with the c port of the first shuttle valve, and the other end of the third shuttle valve is connected with the c port of the second shuttle valve; and the port c of the third shuttle valve is connected with the port a of the fifth two-position three-way reversing valve.
Further, the hydraulic control system further comprises a first pump, and oil inlets P of the brake valve group, the fast rotating handle and the slow rotating handle are connected with the oil tank T through the first pump.
Further, the first pump is connected with an overflow valve.
Further, the device also comprises a second pump and a third pump; an oil inlet P of the quick-rotation multi-way valve is connected with an oil tank T through a second pump; the slow rotation multi-way valve is connected with the oil tank T through a third pump.
Further, the device also comprises a fast rotation pressure gauge and a slow rotation pressure gauge; the fast rotation pressure gauge is connected with the fast rotation multi-way valve; and the slow rotation pressure gauge is connected with the slow rotation multi-way valve.
Accordingly, the control method of the safety device for the power head comprises the following steps:
When the drilling machine is ready to start directional drilling construction, a brake control handle is pushed, an oil inlet P of a brake valve bank is communicated with an outlet A, a control oil way is transmitted to an oil inlet a of a safety interlocking valve bank through a pipeline, at the moment, a two-position three-way reversing valve is positioned at the right position under the action of a spring, pressure oil of the oil inlet a is divided into two paths of oil after passing through a fifth two-position three-way reversing valve, one path of oil enters an oil inlet Br of a brake through an oil outlet b, so that the brake enters a braking state, a gear box gear shaft is held tightly, and a braking function is realized; the other path is simultaneously connected to the port a of the first two-position three-way reversing valve, the second two-position three-way reversing valve, the third two-position three-way reversing valve and the fourth two-position three-way reversing valve, so that the four two-position three-way reversing valves overcome spring force to realize reversing simultaneously, the left position after reversing enters a working state, the oil outlet A1, the oil outlet A2, the oil outlet A3 and the oil outlet A4 of the safety interlocking valve group after reversing are communicated with the port T through the port A of the first two-position three-way reversing valve, the port A of the second two-position three-way reversing valve, the port A of the third two-position three-way reversing valve and the port A of the fourth two-position three-way reversing valve, and the port T is connected with an oil tank, and therefore the fast rotation multipath valve is in an unloading state with the control oil port a and the control oil port b of the slow rotation multipath valve, and at the moment, the oil inlet P1, the oil inlet P2, the oil inlet P3 and the oil inlet P4 are respectively blocked through the first two-position three-way reversing valve, the second two-way reversing valve, the third two-position three-way reversing valve and the action output of the fast rotation handle and the slow rotation handle are cut off.
Accordingly, the control method of the safety device for the power head comprises the following steps:
When the brake handle, the fast rotating handle and the slow rotating handle are not operated, an oil inlet Br of the brake is communicated with an oil tank T through a brake valve group, so that the brake is in a default loosening state, and at the moment, the fast rotating handle or the slow rotating handle realizes normal operation of the power head;
when the brake handle, the fast rotating handle and the slow rotating handle are not operated, the oil outlet A1, the oil outlet A2, the oil outlet A3 and the oil outlet A4 are respectively communicated with the T ports of the two-position three-way reversing valves, the brake handle is normally operated, and the brake is freely released and braked;
When the brake handle is operated firstly and the fast rotating handle or the slow rotating handle is not operated, an oil inlet Br of the brake is communicated with an oil inlet P of the brake valve group through an outlet A of the brake valve group, so that an oil inlet Br of the brake is communicated with pressure oil, and the brake is in a braking state;
When the quick rotating handle or the slow rotating handle is operated firstly and the brake handle is not operated, the pressure of one oil port among the oil port A1, the oil port A2, the oil port A3 and the oil port A4 is increased and is transmitted to the control oil port a or the control oil port b of the quick rotating multi-way valve or the slow rotating multi-way valve, so that the quick rotating multi-way valve or the slow rotating multi-way valve is switched, meanwhile, control oil flows to the port a of the fifth two-position three-way switching valve through the first shuttle valve, the second shuttle valve and the third shuttle valve to enable the valve to be switched, the port A of the fifth two-position three-way switching valve is communicated with the port T after the switching, meanwhile, the port A of the fifth two-position three-way switching valve is connected with the oil inlet Br of the brake, and the oil inlet Br of the brake is connected with the oil tank T, and therefore the brake is completely free.
Correspondingly, the drilling machine is provided with the safety device for the power head.
The invention has the beneficial effects that:
Through the reasonable configuration of the safety interlocking valve group, according to the characteristics of the coal mine directional drilling machine in the construction, the rotation action of the power head and the bidirectional interlocking of the brake oil path are realized, and the problem that the brake is damaged due to the fact that the drilling machine is easy to operate by mistake, so that the construction efficiency is affected is solved.
Drawings
FIG. 1 is a hydraulic schematic of a safety device for a power head of the present invention;
FIG. 2 is a schematic diagram of a safety interlock valve block of the present invention;
Reference numerals:
1. The hydraulic system comprises a first pump, 2, an overflow valve, 3, a second pump, 4, a fast rotation pressure gauge, 5, a fast rotation multi-way valve, 6, a rotation motor, 7, a brake, 8, a brake valve group, 9, a safety interlocking valve group, 10, a fast rotation handle, 11, a slow rotation handle, 12, a slow rotation pressure gauge, 13, a slow rotation multi-way valve, 14, a third pump, 15, a first two-position three-way reversing valve, 16, a second two-position three-way reversing valve, 17, a third two-position three-way reversing valve, 18, a fourth two-position three-way reversing valve, 19, a fifth two-position three-way reversing valve, 20, a first shuttle valve, 21, a second shuttle valve, 22 and a third shuttle valve.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present invention, and are not intended to limit the scope of the present invention.
As shown in fig. 1, the safety device for a power head of the present invention includes: the hydraulic control system comprises an oil tank T, a quick-rotation multi-way valve 5, a quick-rotation handle 10, a rotation motor 6, a slow-rotation multi-way valve 13, a slow-rotation handle 11, a brake 7, a brake valve group 8 and a safety interlocking valve group 9; the quick-rotation multi-way valve 5, the quick-rotation handle 10, the rotary motor 6, the slow-rotation multi-way valve 13, the slow-rotation handle 11, the brake 7, the brake valve group 8 and the safety interlocking valve group 9 are all provided with an oil return port T which is connected with an oil tank T; the safety interlocking valve group 9 is provided with an oil inlet P1, an oil inlet P2, an oil inlet P3, an oil inlet P4 and an oil inlet a, and an oil outlet A1, an oil outlet A2, an oil outlet A3, an oil outlet A4 and an oil outlet b; the quick rotating handle 10 and the slow rotating handle 11 are respectively provided with an oil outlet A and an oil outlet B; the fast rotation multi-way valve 5 and the slow rotation multi-way valve 13 are respectively provided with a control oil port a and a control oil port b; the brake 7 is provided with an oil inlet Br; the brake valve group 8 is provided with an outlet A; the oil inlet P1 and the oil inlet P2 of the safety interlocking valve group 9 are respectively connected with the oil outlet A and the oil outlet B of the quick rotating handle 10; the oil inlet P3 and the oil inlet P4 of the safety interlocking valve group 9 are respectively connected with the oil outlet A and the oil outlet B of the slow rotation handle 11; an oil inlet a of the safety interlocking valve group 9 is connected with an outlet A of the brake valve group 8; the oil outlet A1 and the oil outlet A2 of the safety interlocking valve group 9 are respectively connected with a control oil port a and a control oil port b of the quick-rotation multi-way valve 5; the oil outlet A3 and the oil outlet A4 of the safety interlocking valve group 9 are respectively connected with a control oil port a and a control oil port b of the slow rotation multi-way valve 13; an oil outlet b of the safety interlocking valve group 9 is connected with an oil inlet Br of the brake 7, one end of the rotary motor 6 is connected with the brake 7, and the other end of the rotary motor is respectively connected with the fast rotary multi-way valve 5 and the slow rotary multi-way valve 13.
The safety device for the power head further comprises a first pump 1, and oil inlets P of the brake valve group 8, the fast rotating handle 10 and the slow rotating handle 11 are all connected with an oil tank T through the first pump 1. The first pump 1 is connected with an overflow valve 2 for controlling an oil path for the whole machine. Further comprising a second pump 3 and a third pump 14; an oil inlet P of the quick-rotation multi-way valve 5 is connected with an oil tank T through a second pump 3; the slow-rotation multiplex valve 13 is connected to the tank T via a third pump 14. Also comprises a fast rotation pressure gauge 4 and a slow rotation pressure gauge 12; the fast rotation pressure gauge 4 is connected with a fast rotation multi-way valve 5; the slow rotation pressure gauge 12 is connected with a slow rotation multi-way valve 13.
The power head quick-rotation multi-way valve 5 is controlled by a quick-rotation handle 10, and the power head slow-rotation multi-way valve 13 is controlled by a slow-rotation handle 11. The fast-rotation multi-way valve controls the power head to rotate when drilling normally, and the slow-rotation multi-way valve controls the power head to rotate slowly and is used for special working conditions such as rotation angle modulation and the like when directional drilling working conditions. All are "O" functions, i.e. neutral locking.
The brake valve group 8 comprises a pressure reducing valve and a manual reversing valve, wherein the pressure reducing valve is used for adjusting the pressure of a brake oil port, and the manual reversing valve is used for controlling the brake to switch between two states, namely a braking state and a releasing state.
The fast rotation multi-way valve 5 and the slow rotation multi-way valve 13 can be common multi-way valves or proportional multi-way valves.
As shown in fig. 2, the safety interlocking valve group 9 adopted by the invention is provided with a first two-position three-way reversing valve 15, a second two-position three-way reversing valve 16, a third two-position three-way reversing valve 17, a fourth two-position three-way reversing valve 18 and a fifth two-position three-way reversing valve 19; each two-position three-way reversing valve is provided with a P port, an A port, an a port and a T port; the port P of the first two-position three-way reversing valve 15 is connected with an oil inlet P1, and the port A is connected with an oil outlet A1; the P port of the second two-position three-way reversing valve 16 is connected with an oil inlet P2, and an oil inlet a and an oil outlet A2; the port P of the third two-position three-way reversing valve 17 is connected with an oil inlet P3, and the port A is connected with an oil outlet A3; the port P of the fourth two-position three-way reversing valve 18 is connected with an oil inlet P4, and the port A is connected with an oil outlet A4; the P port of the fifth two-position three-way reversing valve 19 is connected with an oil inlet a, and the A port is connected with an oil outlet b; the ports a of the first two-position three-way reversing valve 15, the second two-position three-way reversing valve 16, the third two-position three-way reversing valve 17 and the fourth two-position three-way reversing valve 18 are interconnected and commonly connected with the port A of the fifth two-position three-way reversing valve 19; the T port of each two-position three-way reversing valve is connected with an oil tank T.
The safety interlocking valve group 9 adopted by the invention is also provided with a first shuttle valve 20, a second shuttle valve 21 and a third shuttle valve 22; each shuttle valve is provided with a c port; one end of the first shuttle valve 20 is connected with an A port of the first two-position three-way reversing valve 15, and the other end of the first shuttle valve is connected with an A port of the second two-position three-way reversing valve 16; one end of the second shuttle valve 21 is connected with an A port of the third two-position three-way reversing valve 17, and the other end of the second shuttle valve is connected with an A port of the fourth two-position three-way reversing valve 18; one end of the third shuttle valve 22 is connected with the c port of the first shuttle valve 20, and the other end is connected with the c port of the second shuttle valve 21; the port of the third shuttle valve 22c is connected with the port a of the fifth two-position three-way reversing valve 19.
The first two-position three-way reversing valve 15, the second two-position three-way reversing valve 16, the third two-position three-way reversing valve 17, the fourth two-position three-way reversing valve 18, the fifth two-position three-way reversing valve 19, the first shuttle valve 20, the second shuttle valve 21 and the third shuttle valve 22 are all plug-in type, so that space is saved.
Based on the safety device for the power head, the safety device is used for multi-degree-of-freedom tunnel drilling, and the control methods under two scenes before drilling and during drilling are respectively provided:
Embodiment one:
When the drilling machine is ready to start directional drilling construction, a brake control handle is pushed firstly, a middle two-position three-way manual valve of the brake valve group 8 is reversed, an oil inlet P of the brake valve group 8 is communicated with an outlet A after reversing, a control oil way is transmitted to an oil inlet a of the safety interlocking valve group 9 through a pipeline, at the moment, the two-position three-way reversing valve 19 is at a default position, namely at a right position under the action of a spring, pressure oil of the oil inlet a is divided into two paths of oil after passing through a fifth two-position three-way reversing valve 19, one path of oil enters an oil inlet Br of a brake 7 through an oil outlet b, so that the brake enters a braking state, and a gear box gear shaft is held tightly, so that a braking function is realized; the other path is simultaneously connected to the port a of the first two-position three-way reversing valve 15, the second two-position three-way reversing valve 16, the third two-position three-way reversing valve 17 and the fourth two-position three-way reversing valve 18, so that the four two-position three-way reversing valves overcome spring force and simultaneously realize reversing, the left position after reversing enters a working state, the oil outlet A1, the oil outlet A2, the oil outlet A3 and the oil outlet A4 of the safety interlocking valve 9 after reversing are respectively dead through the port A of the first two-position three-way reversing valve 15, the port A of the second two-position three-way reversing valve 16, the port T of the third two-position three-way reversing valve 17 and the port T of the fourth two-position three-way reversing valve 18, and the port T is connected with an oil tank, thereby realizing that the control oil port a and the control oil port b of the fast-rotation multiway valve 5 and the slow-rotation multiway valve 13 are in an unloading state, and the oil inlet P1, the oil inlet P2, the oil inlet P3 and the oil inlet P4 are respectively dead through the first two-position three-way reversing valve 15, the second two-position three-way reversing valve 16, the third two-way reversing valve 17 and the fourth two-position three-way reversing valve 18, the fast rotation handle 10 and the slow rotation motion of the rotation handle 10 are cut off, and the rotation speed is ensured.
Embodiment two:
When the drilling machine rotates normally, the brake handle can be operated without action, and the operation is similar to the operation described above and is not described in detail. The rotary action of the power head and the bidirectional interlocking of the brake oil path are realized, and the problem that the brake is damaged and the construction efficiency is affected due to the fact that a drilling machine is easy to operate by mistake in the prior art is solved.
The specific implementation control method comprises the following four control modes:
In the first mode, when the brake handle, the fast rotating handle 10 and the slow rotating handle 11 are not operated, an oil inlet Br of the brake 7 is communicated with an oil tank T through a brake valve group 8, so that the brake is in a default loosening state, and at the moment, the fast rotating handle 10 or the slow rotating handle 11 realizes normal operation of the power head;
in the second mode, when the brake handle, the fast rotating handle 10 and the slow rotating handle 11 are not operated, the oil outlet A1, the oil outlet A2, the oil outlet A3 and the oil outlet A4 are respectively communicated with the T ports of the two-position three-way reversing valves, the brake handle is normally operated, and the brake 7 is freely released and braked;
In the third mode, when the brake handle is operated firstly and the fast rotating handle 10 or the slow rotating handle 11 is not operated, an oil inlet Br of the brake 7 is communicated with an oil inlet P of the brake valve group 8 through an outlet A of the brake valve group 8, so that an oil inlet Br of the brake 7 is communicated with pressure oil, and the brake is in a braking state;
When the quick rotating handle 10 or the slow rotating handle 11 is operated firstly and the brake handle is not operated, the pressure of one oil port among the oil port A1, the oil port A2, the oil port A3 and the oil port A4 is increased, and is transmitted to the quick rotating multi-way valve 5 or the slow rotating multi-way valve 13 to control the oil port a or the control oil port b, so that the reversing of the quick rotating multi-way valve 5 or the slow rotating multi-way valve 13 is realized, meanwhile, the control oil flows to the port of the fifth two-position three-way reversing valve 19a through the first shuttle valve 20, the second shuttle valve 21 and the third shuttle valve 22 to enable the port to be reversed, the port A of the fifth two-position three-way reversing valve 19 is communicated with the port T after reversing, and meanwhile, the port A of the fifth two-position three-way reversing valve 19 is connected with the oil port Br of the brake 7 to realize that the oil port Br of the brake 7 is connected with the oil tank T, so that the brake is completely free.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Also in the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. And in the drawings of the present invention, the filling patterns are only for distinguishing the layers, and are not limited in any way.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. A safety device for a power head, comprising: the oil tank T, a quick-rotation multi-way valve (5), a quick-rotation handle (10), a rotary motor (6), a slow-rotation multi-way valve (13), a slow-rotation handle (11), a brake (7), a brake valve group (8) and a safety interlocking valve group (9) are respectively connected with the oil tank T; the safety interlocking valve group (9) is provided with an oil inlet P1, an oil inlet P2, an oil inlet P3, an oil inlet P4 and an oil inlet a, and an oil outlet A1, an oil outlet A2, an oil outlet A3, an oil outlet A4 and an oil outlet b; the quick rotating handle (10) and the slow rotating handle (11) are respectively provided with an oil outlet A and an oil outlet B; the fast rotation multi-way valve (5) and the slow rotation multi-way valve (13) are respectively provided with a control oil port a and a control oil port b; the brake (7) is provided with an oil inlet Br; the brake valve group (8) is provided with an outlet A; an oil inlet P1 and an oil inlet P2 of the safety interlocking valve group (9) are respectively connected with an oil outlet A and an oil outlet B of the quick rotating handle (10); an oil inlet P3 and an oil inlet P4 of the safety interlocking valve group (9) are respectively connected with an oil outlet A and an oil outlet B of the slow rotating handle (11); an oil inlet a of the safety interlocking valve group (9) is connected with an outlet A of the brake valve group (8); an oil outlet A1 and an oil outlet A2 of the safety interlocking valve group (9) are respectively connected with a control oil port a and a control oil port b of the quick-rotation multi-way valve (5); an oil outlet A3 and an oil outlet A4 of the safety interlocking valve group (9) are respectively connected with a control oil port a and a control oil port b of the slow rotation multi-way valve (13); an oil outlet b of the safety interlocking valve group (9) is connected with an oil inlet Br of a brake (7), one end of a rotary motor (6) is connected with the brake (7), and the other end of the rotary motor is respectively connected with a fast rotary multi-way valve (5) and a slow rotary multi-way valve (13).
2. Safety arrangement for a power head according to claim 1, characterized in that the safety interlock valve group (9) is provided with a first two-position three-way reversing valve (15), a second two-position three-way reversing valve (16), a third two-position three-way reversing valve (17), a fourth two-position three-way reversing valve (18) and a fifth two-position three-way reversing valve (19); each two-position three-way reversing valve is provided with a P port, an A port, an a port and a T port; the port P of the first two-position three-way reversing valve (15) is connected with an oil inlet P1, and the port A is connected with an oil outlet A1; the P port of the second two-position three-way reversing valve (16) is connected with an oil inlet P2, and an oil outlet A2 of the oil inlet a; the port P of the third two-position three-way reversing valve (17) is connected with an oil inlet P3, and the port A is connected with an oil outlet A3; the port P of the fourth two-position three-way reversing valve (18) is connected with an oil inlet P4, and the port A is connected with an oil outlet A4; a P port of the fifth two-position three-way reversing valve (19) is connected with an oil inlet a, and an A port is connected with an oil outlet b; the ports a of the first two-position three-way reversing valve (15), the second two-position three-way reversing valve (16), the third two-position three-way reversing valve (17) and the fourth two-position three-way reversing valve (18) are interconnected and are commonly connected with the port A of the fifth two-position three-way reversing valve (19); the T port of each two-position three-way reversing valve is connected with an oil tank T.
3. Safety arrangement for a power head according to claim 2, characterized in that the safety interlock valve group (9) is further provided with a first shuttle valve (20), a second shuttle valve (21) and a third shuttle valve (22); each shuttle valve is provided with a c port; one end of the first shuttle valve (20) is connected with an A port of the first two-position three-way reversing valve (15), and the other end of the first shuttle valve is connected with an A port of the second two-position three-way reversing valve (16); one end of the second shuttle valve (21) is connected with an A port of the third two-position three-way reversing valve (17), and the other end of the second shuttle valve is connected with an A port of the fourth two-position three-way reversing valve (18); one end of the third shuttle valve (22) is connected with the c port of the first shuttle valve (20), and the other end of the third shuttle valve is connected with the c port of the second shuttle valve (21); the c port of the third shuttle valve (22) is connected with the a port of the fifth two-position three-way reversing valve (19).
4. Safety device for a power head according to claim 1, characterized in that it further comprises a first pump (1), the oil inlets P of the brake valve group (8), the fast rotation handle (10) and the slow rotation handle (11) being connected to the oil tank T by the first pump (1).
5. Safety device for a power head according to claim 4, characterized in that the first pump (1) is connected with an overflow valve (2).
6. Safety device for a power head according to claim 1, characterized in that it further comprises a second pump (3) and a third pump (14); an oil inlet P of the quick-rotation multi-way valve (5) is connected with an oil tank T through a second pump (3); the slow-rotation multi-way valve (13) is connected with the oil tank T through a third pump (14).
7. The safety arrangement for a power head according to claim 1, further comprising a fast rotation pressure gauge (4) and a slow rotation pressure gauge (12); the fast rotation pressure gauge (4) is connected with the fast rotation multi-way valve (5); the slow rotation pressure gauge (12) is connected with the slow rotation multi-way valve (13).
8. The control method of the safety device for the power head according to claim 2, characterized in that:
When the drilling machine is ready to start directional drilling construction, a brake control handle is pushed, an oil inlet P of a brake valve group (8) is communicated with an outlet A, a control oil way is transmitted to an oil inlet a of a safety interlocking valve group (9) through a pipeline, at the moment, a two-position three-way reversing valve (19) is positioned at the right position under the action of a spring, pressure oil of the oil inlet a is divided into two paths of oil after passing through a fifth two-position three-way reversing valve (19), one path of oil enters an oil inlet Br of a brake (7) through an oil outlet b, so that the brake enters a braking state, and a gear shaft of a gear box body is held tightly, so that a braking function is realized; the other path is simultaneously connected to an a port of a first two-position three-way reversing valve (15), a second two-position three-way reversing valve (16), a third two-position three-way reversing valve (17) and a fourth two-position three-way reversing valve (18), so that the four two-position three-way reversing valves overcome spring force to realize reversing simultaneously, the left position after reversing enters a working state, an oil outlet A1, an oil outlet A2, an oil outlet A3 and an oil outlet A4 of a safety interlocking valve group (9) after reversing are respectively communicated with a T port through the first two-position three-way reversing valve (15), the second two-position three-way reversing valve (16), the third two-position three-way reversing valve (17) and the fourth two-position three-way reversing valve (18), and the T port is connected with an oil tank, thereby realizing that a control oil port a and a control oil port b of a fast-rotation multiway valve (5) and a slow-rotation multiway valve (13) are in an unloading state, and an oil inlet P1, an oil inlet P2, an oil inlet P3 and an oil inlet P4 are respectively communicated with a fast-position three-way reversing valve (18) through the first two-position three-way reversing valve (15), the second two-way reversing valve (16), the third two-position three-way reversing valve (17) and the fourth two-way reversing valve (17) and the handle (11) are rotated and slowly.
9. A control method of a safety device for a power head according to claim 3, characterized in that:
When the brake handle, the fast rotating handle (10) and the slow rotating handle (11) are not operated, an oil inlet Br of the brake (7) is communicated with an oil tank T through a brake valve group (8) to enable the brake to be in a default loosening state, and at the moment, the fast rotating handle (10) or the slow rotating handle (11) realizes normal operation of the power head;
When the brake handle, the fast rotating handle (10) and the slow rotating handle (11) are not operated, the oil outlet A1, the oil outlet A2, the oil outlet A3 and the oil outlet A4 are respectively communicated with the T ports of the two-position three-way reversing valves, the brake handle is normally operated, and the brake (7) is freely released and braked;
when the brake handle is operated firstly and the fast rotating handle (10) or the slow rotating handle (11) is not operated, an oil inlet Br of the brake (7) is communicated with an oil inlet P of the brake valve group (8) through an outlet A of the brake valve group (8), so that an oil inlet Br of the brake (7) is communicated with pressure oil, the brake is in a braking state, meanwhile, the oil passage controls a first two-position three-way reversing valve (15), a second two-position three-way reversing valve (16), a third two-position three-way reversing valve (17) and a fourth two-position three-way reversing valve (18) through an oil outlet b of the safety interlocking valve group (9), and accordingly an oil outlet A1, an oil outlet A2, an oil outlet A3 and an oil outlet A4 are respectively communicated with T ports of the two-position three-way reversing valves, and are in a closed state with the oil inlets P1, P2, P3 and P4 connected with the fast rotating handle (10) and the slow rotating handle (11), and the action output of the fast rotating handle (10) and the slow rotating handle (11) is cut off;
When the quick rotating handle (10) or the slow rotating handle (11) is operated firstly and the brake handle is not operated, the pressure of one oil port among the oil port A1, the oil port A2, the oil port A3 and the oil port A4 is increased, the pressure is transmitted to the control oil port a or the control oil port b of the quick rotating multi-way valve (5) or the slow rotating multi-way valve (13), the reversing of the quick rotating multi-way valve (5) or the slow rotating multi-way valve (13) is realized, meanwhile, the control oil flows to the port a of the fifth two-position three-way reversing valve (19) through the first shuttle valve (20), the second shuttle valve (21) and the third shuttle valve (22) to enable the oil to be reversed, the port A of the fifth two-position three-way reversing valve (19) is communicated with the port T after reversing, and meanwhile, the port A of the fifth two-position three-way reversing valve (19) is connected with the oil port Br of the brake (7), so that the Br of the oil inlet of the brake (7) is connected with the oil tank T, and the brake is completely free.
10. A drilling machine, characterized in that the drilling machine is provided with a safety device for a power head according to any one of claims 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410303025.2A CN118328035A (en) | 2024-03-18 | 2024-03-18 | Safety device for power head, control method and drilling machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410303025.2A CN118328035A (en) | 2024-03-18 | 2024-03-18 | Safety device for power head, control method and drilling machine |
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| Publication Number | Publication Date |
|---|---|
| CN118328035A true CN118328035A (en) | 2024-07-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410303025.2A Pending CN118328035A (en) | 2024-03-18 | 2024-03-18 | Safety device for power head, control method and drilling machine |
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| Country | Link |
|---|---|
| CN (1) | CN118328035A (en) |
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- 2024-03-18 CN CN202410303025.2A patent/CN118328035A/en active Pending
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