CN117646750A - Roofbolter and hydraulic propulsion system thereof - Google Patents
Roofbolter and hydraulic propulsion system thereof Download PDFInfo
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- CN117646750A CN117646750A CN202311367811.0A CN202311367811A CN117646750A CN 117646750 A CN117646750 A CN 117646750A CN 202311367811 A CN202311367811 A CN 202311367811A CN 117646750 A CN117646750 A CN 117646750A
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- 230000001105 regulatory effect Effects 0.000 claims abstract description 27
- 239000011435 rock Substances 0.000 claims abstract description 21
- 230000001276 controlling effect Effects 0.000 claims abstract description 4
- 230000001970 hydrokinetic effect Effects 0.000 claims description 6
- 238000003860 storage Methods 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 3
- 238000005452 bending Methods 0.000 abstract description 6
- 239000007788 liquid Substances 0.000 abstract description 5
- 239000003921 oil Substances 0.000 description 37
- 238000005553 drilling Methods 0.000 description 7
- 239000010720 hydraulic oil Substances 0.000 description 7
- 239000000428 dust Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000004873 anchoring Methods 0.000 description 3
- 230000008093 supporting effect Effects 0.000 description 3
- 238000005422 blasting Methods 0.000 description 2
- 238000009530 blood pressure measurement Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
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Abstract
The invention discloses an jumbolter and a hydraulic propulsion system thereof, comprising: the propulsion valve group is used for controlling the propulsion oil cylinder to advance and retreat and is provided with a pressure limiting valve; the pushing cylinder is provided with a rodless cavity communicated with a first port of the pushing valve group, and a rod cavity communicated with a second port of the pushing valve group; the voltage regulating module includes: the throttling piece is connected in series between the first port of the propulsion valve group and the rodless cavity of the propulsion oil cylinder; and the pressure control valve is associated with the throttling element, amplifies the pressure difference between the inlet and the outlet of the throttling element, and is connected with the propulsion valve group pressure limiting valve in parallel. During normal operation, the oil liquid of the propulsion valve group reaches the propulsion cylinder after being throttled by the throttling piece. When the hard rock is drilled, the speed is reduced, the flow is reduced, the pressure difference generated at the two ends of the throttling element is small, the pressure acting on the pressure control valve is small, the conduction value of the pressure control valve is small, namely, the pressure control valve is unloaded when the hard rock is met, the unloading of the valve group is pushed, the pushing pressure is reduced, and the phenomena of bending a drill rod and bending the drill rod are avoided.
Description
Technical Field
The invention relates to the technical field of hydraulic control elements, in particular to an anchor rod drilling machine and a hydraulic propulsion system thereof.
Background
The anchor rod drilling machine is also called an anchoring drilling machine, is a main drilling tool and key equipment in the working process of using an anchor rod for supporting a coal mine tunnel, and has outstanding advantages in the aspects of improving the supporting effect, reducing the supporting cost, accelerating the roadway forming speed, reducing the auxiliary transportation quantity, reducing the labor intensity, improving the utilization rate of the section of the tunnel and the like.
Based on the advantages, the anchor rod assembly is also used for landslide and dangerous rock anchoring engineering in various geological disaster prevention and treatment of hydropower stations, railways and highway slopes, is particularly suitable for high slope rock anchoring engineering, is also suitable for construction of urban deep foundation pit supports, anti-floating anchors, foundation grouting reinforcement engineering holes, blasting holes of blasting engineering, high-pressure jet grouting piles, tunnel pipe shed support holes and the like, and can be used for conveniently and omnidirectionally constructing by slightly changing power heads.
As shown in fig. 1, the jumbolter mainly comprises a drill rod and a hydraulic system, wherein the hydraulic system comprises a propulsion valve group 0200 and a propulsion oil cylinder 0100, a piston rod of the propulsion oil cylinder 0100 is connected with a propulsion slide rail, and a user adjusts the propulsion valve group 0200 through an operation handle 0202, so that the propulsion pressure of the propulsion oil cylinder 0100 is controlled.
When the jumbolter acts on the wall bodies with different hardness, the propelling pressure and the speed of the drill rod need to be adjusted at any time. If the adjustment is not performed, when facing the hard rock wall, the situation that the drill rod is turned in situ, the drill rod is ground, and even the drill rod is bent and broken because the drill rod is not moved to the wall exists.
When the drill rod is propped against hard rock, the propelling pressure can be increased, and hydraulic oil delivered to the propelling oil cylinder 0100 is unloaded through the pressure limiting valve 0201 of the propelling valve group 0200. Specifically, when the pressure value of the hydraulic oil reaches the safety pressure of the pressure limiting valve, the hydraulic oil is unloaded through the pressure limiting valve 0201. In order to ensure the normal operation of the propulsion valve group 0200, the safety pressure of the pressure limiting valve 0201 is relatively high, so that the hydraulic oil can be unloaded only when reaching the safety pressure, and the safety of the drill rod is affected because the hydraulic oil cannot be unloaded if the pressure is not reached.
Therefore, how to provide a hydraulic propulsion system of a jumbolter so as to reduce the pressure requirement during unloading and ensure the safety of a drill rod is a technical problem to be solved by a person skilled in the art.
Disclosure of Invention
In view of the above, the invention provides a hydraulic propulsion system of an jumbolter, which is used for reducing the pressure requirement during unloading and ensuring the safety of a drill rod. In addition, the invention also provides the jumbolter with the hydraulic propulsion system.
In order to achieve the above purpose, the present invention provides the following technical solutions:
a hydraulic propulsion system for a roof bolter, comprising:
a propulsion valve block having a pressure limiting valve;
the rodless cavity of the pushing oil cylinder is communicated with the first port of the pushing valve group, the rod cavity of the pushing oil cylinder is communicated with the second port of the pushing valve group, and the piston rod of the pushing oil cylinder is connected with the pushing sliding rail to drive the drill rod to drill;
the pressure regulating module, the pressure regulating module includes: the throttle valve is connected in series between the first port of the propulsion valve group and the rodless cavity of the propulsion oil cylinder; the pressure control valve is connected with the throttling element and amplifies the pressure difference between the inlet and the outlet of the throttling element, and the pressure control valve is connected with the pressure limiting valve in parallel; when the drill rod works normally, the conducting pressure of the pressure control valve is larger than the safety pressure of the pressure limiting valve; when the drill rod drills hard rock, the conducting pressure of the pressure control valve is smaller than the safety pressure of the pressure limiting valve, and the propulsion valve group is unloaded through the pressure control valve.
Preferably, in the hydraulic propulsion system of the roof bolter, the propulsion valve group includes:
the first port of the propulsion control module is communicated with the rodless cavity of the propulsion oil cylinder, the second port of the propulsion control module is communicated with the rod cavity of the propulsion oil cylinder, and the pressure limiting valve is integrated in the propulsion control module;
and the handle is used for controlling the propulsion control module.
Preferably, in the hydraulic propulsion system of the roof bolter, the pressure control valve includes:
the control assembly comprises a shell and a piston which is positioned in the shell and moves axially, a first port of the shell is opposite to an upper acting surface of the piston and is communicated with an inlet of the throttling element; the second port of the shell is opposite to the lower acting surface of the piston and communicated with the outlet of the throttling element;
the overflow assembly comprises a valve sleeve and a valve core positioned in the valve sleeve, the valve core is propped against the piston, the lower acting surface is positioned between the upper acting surface and the valve core, and the area of the cross section between the upper acting surface and the lower acting surface of the piston is larger than the area of the cross section of the valve core; the outlet of the overflow assembly is communicated with the oil storage part; the U port of the propulsion valve group is communicated with the U port of the overflow assembly; the overflow assembly is connected with the pressure limiting valve in parallel.
Preferably, in the hydraulic propulsion system of the roof bolter, the control assembly and the overflow assembly are integrated.
Preferably, in the hydraulic propulsion system of a roof bolter, the pressure regulating module further includes:
and the overflow valve is connected with the overflow assembly in series and is connected between the overflow assembly and the U port of the propulsion valve group.
Preferably, in the hydraulic propulsion system of the jumbolter, the area of the cross section between the acting surfaces of the piston is three times the area of the valve core.
Preferably, in the hydraulic propulsion system of the jumbolter, the piston comprises a first small-diameter section, a large-diameter section and a second small-diameter section which are sequentially connected, two ends of the large-diameter section are respectively provided with two acting surfaces of the piston, the second small-diameter section can be propped against the valve core, and the diameter of the second small-diameter section is the same as that of the valve core.
Preferably, in the hydraulic propulsion system of a roof bolter, the pressure regulating module further includes:
the one-way valve is connected with the throttling piece in parallel, and the conduction direction of the one-way valve is from the outlet of the throttling piece to the inlet of the throttling piece.
Preferably, in the hydraulic propulsion system of the roof bolter, the plurality of throttle members are provided, any one of the throttle members is connected in series between the propulsion valve group and the rodless cavity of the propulsion cylinder, and the throttle members connected in series are communicated with the pressure regulating module.
A roof bolter comprising a hydraulic propulsion system, wherein the hydraulic propulsion system is any one of the hydraulic propulsion systems described above.
The invention provides a hydraulic propulsion system of an jumbolter, which is characterized in that a pressure regulating module is connected in series between a propulsion valve group and a propulsion oil cylinder, and the pressure regulating module comprises a throttling piece and a pressure control valve which are connected in series. When the jumbolter works normally, the oil liquid of the propulsion valve group reaches the propulsion oil cylinder after being throttled by the throttling piece. When the jumbolter drills hard rock, the drill rod is difficult to walk, the forced speed is reduced, the flow is reduced, the pressure difference generated at the two ends of the throttling element is reduced, the pressure acting on the pressure control valve is small and is equivalent to the conduction value of the pressure control valve to be small, so that when the hard rock wall is met, the pressure control valve is unloaded, namely the unloading of the propulsion valve group is realized, the propulsion pressure of the propulsion valve group is reduced, and the phenomena of drill rod bending and drill rod bending caused by the fact that the drill rod is not moved when the hard rock wall is met can be effectively avoided.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic structural view of a hydraulic propulsion system of a roof bolter disclosed in a prior art embodiment;
FIG. 2 is a schematic structural view of a hydraulic propulsion system of the roof bolter disclosed in an embodiment of the present application;
FIG. 3 is a hydraulic schematic of the hydraulic propulsion system of the roof bolter disclosed in the embodiments of the present application;
FIG. 4 is an exploded view of a pressure regulating module of the hydraulic propulsion system of the roof bolter disclosed in an embodiment of the present application;
FIG. 5 is an exploded view of another orientation of a pressure regulating module of the hydrokinetic thrust system of the roof bolter disclosed in the embodiments of the present application;
FIG. 6 is a disassembled view of a pressure control valve of the pressure regulating module disclosed in an embodiment of the present application;
FIG. 7 is a cross-sectional view of a pressure control valve of the pressure regulating module disclosed in an embodiment of the present application;
fig. 8 is another directional cross-sectional view of a pressure control valve of a pressure regulating module disclosed in an embodiment of the present application.
Detailed Description
The invention discloses a hydraulic propulsion system of an anchor rod drilling machine, which is used for reducing the pressure requirement during unloading and ensuring the safety of a drill rod. In addition, the invention also discloses an jumbolter with the hydraulic propulsion system.
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The terms "first" and "second" are used below for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature.
As shown in fig. 2 and 3, a hydraulic propulsion system of an jumbolter is disclosed herein, comprising a propulsion valve block 200, a propulsion cylinder 100 and a pressure regulating module 300.
The rodless cavity of the propulsion cylinder 100 is communicated with a first port (a port in the figure) of the propulsion valve group 200, the rod cavity of the propulsion cylinder 100 is communicated with a second port (B port in the figure) of the propulsion valve group 200, and a piston rod of the propulsion cylinder 100 is connected with a propulsion slide rail to drive a drill rod to drill.
The push valve block 200 has a pressure limiting valve 201 and a handle 202. The user adjusts the push valve block 200 by operating the handle 202 as described above, thereby controlling the push pressure of the push cylinder 100. When the drill rod is propped against hard rock, the propelling pressure is increased, and hydraulic oil delivered to the propelling cylinder 100 is unloaded through the pressure limiting valve 201 of the propelling valve group 200.
In the embodiment of the application, a pressure regulating module 300 is added between the propulsion cylinder 100 and the propulsion valve group 200, and the pressure value of hydraulic oil delivered to the propulsion cylinder 100 when the drilling rod is jacked to hard rock is regulated by the pressure regulating module 300.
Specifically, the pressure regulating module 300 includes a throttle 302 and a pressure control valve 305. Wherein the throttle 302 is connected in series between the first port of the push valve block 200 and the rodless cavity of the push cylinder 100. As shown in fig. 2, the orifice 302 is connected to the A1 to A2 channels.
In some embodiments, the restriction 302 is an orifice.
A pressure control valve 305 is associated with the throttle 302, the pressure control valve 305 being capable of amplifying the pressure difference between the inlet and outlet of the throttle 302, the pressure control valve 305 being connected in parallel with the pressure limiting valve 201; when the drill rod works normally, the conducting pressure of the pressure control valve 305 is larger than the safety pressure of the pressure limiting valve 201; when the drill rod drills hard rock, the conducting pressure of the pressure control valve 305 is smaller than the safety pressure of the pressure limiting valve 201, and the propulsion valve group 200 is unloaded through the pressure control valve 305.
It should be noted that, when the jumbolter works normally, the oil in the propulsion valve group 200 reaches the propulsion cylinder 100 after being throttled by the throttle member 302. When the jumbolter drills to hard rock, the drill rod is difficult to drill, the forced speed is reduced, when the flow rate is reduced (the lower speed is, the smaller flow rate is), the pressure difference generated at the two ends of the throttling element 302 is small, the pressure acting on the pressure control valve 305 is small, and the pressure equivalent to the conduction value of the pressure control valve 305 is small, so that when the drill is performed, a rock wall with high hardness is encountered, the pressure control valve 305 is unloaded, namely the unloading of the propulsion valve group 200 is realized, the propelling pressure is small, and the phenomena of drill rod bending and drill rod bending caused by the fact that the drill rod is not moved when the hard rock wall is encountered can be effectively avoided.
The oil in the propulsion valve block 200 cannot reach the propulsion cylinder 100, so that no liquid from A1 to A2 flows, i.e. no pressure difference exists between the inlet and the outlet of the throttle 302, and the liquid can be quickly depressurized through the pressure control valve 305.
As can be seen from the above description, the present application monitors the differential pressure of the oil pressure delivered to the propulsion cylinder 100 by the propulsion valve group 200 by adding the throttling element 302, and the pressure control valve 305 is connected in parallel with the pressure limiting valve 201, so that the unloading of the oil through the pressure control valve 305 or the pressure limiting valve 201 can be realized.
In order to avoid that the oil liquid conveyed to the propulsion cylinder 100 by the propulsion valve group 200 is unloaded through the pressure control valve 305 when the drill rod normally works, in the application, the conducting pressure of the pressure control valve 305 is set to be larger than the safety pressure of the pressure limiting valve 201 when the pressure difference between the front and the rear of the throttling element is amplified, and the highest pressure limiting of the system is independent of the pressure regulating module 300 when the drill rod normally works, and mainly depends on the pressure limiting valve 201, so that the normal work of the drill rod is ensured.
When the drill rod drills to hard rock, the conducting pressure of the pressure control valve 305 is smaller than the safety pressure of the pressure limiting valve 201, so that the oil conveyed to the propulsion valve group 200 by the propulsion oil cylinder 100 is directly decompressed through the pressure control valve 305, and unloading of the propulsion valve group 200 is further achieved. Because the conducting pressure of the pressure control valve 305 is smaller than the safety pressure of the pressure limiting valve 201, the hydraulic pressure quickly reaches the pressure, the problem that the drill rod is bent or even broken due to long-time drilling when the drill rod drills to hard rock is avoided, and the installability of the drill rod is ensured.
After unloading, the propelling speed and propelling pressure are smaller, but the device can still work slowly, when a current hard rock wall section breaks through, the hardness of the rock wall is reduced, the propelling speed can be automatically improved, and the working efficiency under working conditions can be effectively ensured.
The structure of the voltage regulating module will be described in detail with reference to fig. 2 to 8.
In some embodiments, the push valve block 200 includes: the first port (a port in the figure) of the propulsion control module is communicated with the rodless cavity of the propulsion cylinder 100, and the second port (B port in the figure) of the propulsion control module is communicated with the rod cavity of the propulsion cylinder 100. In addition, the propulsion valve set 200 further includes an oil inlet module, a rotation control module, a tail module, and the like, and the specific structure and connection relation of the propulsion valve set 200 are not described in detail herein, and reference may be made to the structure of the conventional propulsion valve set 200.
The pressure limiting valve 201 is integrated into the propulsion control module.
The inlet of the throttle 302 described above communicates with a first port of the propulsion control module and a second port of the throttle 302 communicates with the rodless cavity of the propulsion cylinder 100.
As shown in connection with fig. 7 and 8, the pressure control valve 305 includes a control assembly and a relief assembly. The relief assembly is connected in parallel with the pressure limiting valve, and the control assembly is connected to the relief assembly, which in some embodiments is integrated into one piece.
The control assembly comprises a housing and a piston 30511 located within the housing, a first port P1 of the housing being opposite an upper active surface of the piston 30511 and in communication with an inlet of the throttle 302; the second port P2 of the housing is opposite the lower active surface of the piston 30511 and communicates with the outlet of the restriction 302.
The relief assembly includes a valve housing 30501 and a valve spool 30502 positioned within the valve housing 30501, the valve spool 30502 is in abutment with the piston 3051, a lower active surface is positioned between an upper active surface and the valve spool 30502, and an area of a cross section between the upper active surface and the lower active surface of the piston 3053 is greater than an area of a cross section of the valve spool 30502.
The control assembly is connected to the throttle member 302 and the cross-sectional area of the piston 30511 is set to be larger than the cross-sectional area of the spool 30502, so that the differential pressure acting on the pressure control valve 305 by the throttle member 302 is amplified, i.e., the pressure value required when the pressure control valve 305 is turned on is increased.
The pressure differential between the inlet and outlet of the orifice 302 determines the force on the piston of the pressure control valve, which acts on the spool, affecting the pressure at which the spool is conducting through the variation in the cross-sectional area of the piston and the cross-sectional area of the spool.
Taking the example that the cross-sectional area between the acting surfaces of the piston 30511 is three times the area of the spool 30502, it is possible to achieve a three-fold increase in the pressure value required when the pressure control valve 305 is turned on.
The outlet of the overflow assembly is communicated with an oil storage part, and the oil storage part is an oil tank. The pressure control valve in some embodiments is a cylinder type pressure control valve.
The pressure outlet port, e.g., U port, of the push valve block 200 communicates with the U port of the overflow assembly.
The detailed structure of the pressure control valve 305 is further described with reference to fig. 6 to 8:
the relief assembly of the pressure control valve 305 includes: valve housing 30501, valve core 30502, orifice 30503, and lower spring 30504.
The valve body 30502 has an orifice 30503 therein to regulate the oil pressure at the outlet of the valve body 30502, and a valve housing 30501 is provided outside the valve body 30502 so that the valve body 30502 can move in the axial direction of the valve housing 30501. The lower spring 30504 is sleeved on one end of the valve core 30502 away from the throttle hole 30503.
The valve sleeve 30501 is provided with an overflow port which is communicated with the oil cylinder; the valve sleeve 30501 has a U-port, and the U-port of the valve sleeve 30501 communicates with the U-port of the propulsion valve block 200.
The control assembly includes: the oil cylinder mounting disc 30505, the first connecting piece 30506, the relief valve extension rod 3057, the oil cylinder lower cover 30508, the oil cylinder body 30509, the second connecting piece 30510, the piston 30511, the oil cylinder upper cover 30512, the spring seat 30513, the oil cylinder dust cover 30514, the upper spring 30515 and the third connecting piece.
The cylinder mounting disc 30505, the cylinder lower cover 30508, the cylinder body 30509 and the cylinder upper cover 30512 are integrally connected through the second connecting piece 30510, the cylinder dust cover 30510 and the cylinder upper cover 30512 are connected through the third connecting piece 30516, the housing disclosed in the above embodiment is formed, and the piston 30511 is located at the center of the housing and abuts against the valve core 30502 through the overflow valve extension rod 30307.
The cylinder mounting plate 30505 has a first port P1 and a second port P2; the cylinder lower cover 30508 and the cylinder block 30509 have passages communicating with the first port P1 and the second port P2, respectively.
The piston 30511 includes a first small-diameter section, a large-diameter section, and a second small-diameter section that are sequentially connected, two ends of the large-diameter section are two acting surfaces of the piston 30511 respectively, the second small-diameter section can be abutted against the valve core 30502, and the diameter of the second small-diameter section is the same as that of the valve core 30502.
The large diameter section is positioned in the oil cylinder body 30509, the first small diameter section is positioned in the oil cylinder upper cover 30512, the second small diameter section is positioned in the oil cylinder lower cover 30508, and the overflow valve extension rod 30307 is positioned in the oil cylinder mounting disc 30505.
The cylinder dust cover 30510 has an upper spring 30515 therein, and the upper spring 30515 is telescopically mounted between the spring seat 30513 of the first small diameter section and the bottom of the cylinder dust cover 30510.
In summary, the upper spring 30515, the piston 30111, the relief valve extension 3007, and the spool 30502 are disposed in order in the axial direction.
The foregoing discloses a specific structure of the pressure control valve 305, and those skilled in the art will understand that the structure of the pressure control valve 305 may be set according to different needs, so long as the relief pressure can be changed in combination with the pressure difference of the throttling element 302 and all the relief pressures are within the protection range.
As shown in connection with fig. 3 to 5, the pressure regulating module 300 in the present application further includes a mounting base 301, an overflow valve 306, a check valve 304, and a plug 303.
Wherein the relief valve 306, the pressure control valve 305, the check valve 304, and the throttle 302 are all mounted on the mounting base 301.
Relief valve 306 is connected in series with the relief assembly of pressure control valve 305 and is connected between the relief assembly and the U port of push valve block 200. Specifically, the relief valve 306 communicates with the U port of the valve housing 30501. The relief valve 306 is set to a minimum value when it is initially installed and can be manually adjusted at any time when emergency needs arise.
The check valve 304 is connected in parallel with the throttle 302, and the direction of conduction of the check valve 304 is from the outlet of the throttle 302 to the inlet of the throttle 302. The oil in the rodless cavity of the thrust cylinder 100 may return to the thrust valve bank 200 through the check valve 304.
The plug 303 is used to plug the pressure measurement function port or the like on the mounting base 301. The function and arrangement position of the through holes formed on the mounting base 301 can be set according to different requirements, and are all within the protection range.
The pressure taps are shown here as M1, M2, M3 and Pu1 and Pu2, respectively.
In some embodiments, the number of throttles 302 is multiple, and any one of the throttles 302 is in series between the propulsion valve block 200 and the rodless cavity of the propulsion cylinder 100, with the series of throttles 302 in communication with the pressure regulating module 300. The throttle 302 is stored by making another hole in the mounting base 301 for replacement of the throttle 302.
In addition, the embodiment of the application also discloses a jumbolter, which comprises a hydraulic propulsion system, and the hydraulic propulsion system is the hydraulic propulsion system disclosed in the embodiment, so that the jumbolter with the hydraulic propulsion system has all the technical effects and is in a protection range.
As used in the specification and in the claims, the terms "a," "an," "the," and/or "the" are not specific to a singular, but may include a plurality, unless the context clearly dictates otherwise. In general, the terms "comprises" and "comprising" merely indicate that the steps and elements are explicitly identified, and they do not constitute an exclusive list, as other steps or elements may be included in a method or apparatus. The inclusion of an element defined by the phrase "comprising one … …" does not exclude the presence of additional identical elements in a process, method, article, or apparatus that comprises an element.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A hydraulic propulsion system for a roof bolter, comprising:
a propulsion valve block having a pressure limiting valve;
the rodless cavity of the propulsion oil cylinder is communicated with the first port of the propulsion valve group, the rod cavity of the propulsion oil cylinder is communicated with the second port of the propulsion valve group, and the piston rod of the propulsion oil cylinder is connected with the propulsion sliding rail to drive the drill rod to drill;
the pressure regulating module, the pressure regulating module includes: the throttling piece is connected in series between the first port of the propulsion valve group and the rodless cavity of the propulsion oil cylinder; the pressure control valve is connected with the throttling piece and amplifies the pressure difference between an inlet and an outlet of the throttling piece, and the pressure control valve is connected with the pressure limiting valve in parallel; when the drill rod works normally, the conducting pressure of the pressure control valve is larger than the safety pressure of the pressure limiting valve; when the drill rod drills hard rock, the conducting pressure of the pressure control valve is smaller than the safety pressure of the pressure limiting valve, and the propulsion valve group is unloaded through the pressure control valve.
2. The hydrokinetic propulsion system of a roof bolter of claim 1, wherein the propulsion valve block comprises:
the first port of the propulsion control module is communicated with the rodless cavity of the propulsion oil cylinder, and the second port of the propulsion control module is communicated with the rod cavity of the propulsion oil cylinder; the pressure limiting valve is integrated in the propulsion control module;
and the handle is used for controlling the propulsion control module.
3. The hydrokinetic propulsion system of a roof bolter of claim 1, wherein the pressure control valve comprises:
the control assembly comprises a shell and a piston which is positioned in the shell and moves axially, a first port of the shell is opposite to an upper acting surface of the piston and is communicated with an inlet of the throttling element; the second port of the shell is opposite to the lower acting surface of the piston and communicated with the outlet of the throttling element;
the overflow assembly comprises a valve sleeve and a valve core positioned in the valve sleeve, the valve core is propped against the piston, the lower acting surface is positioned between the upper acting surface and the valve core, and the area of the cross section between the upper acting surface and the lower acting surface of the piston is larger than the area of the cross section of the valve core; the outlet of the overflow assembly is communicated with the oil storage part; the U port of the propulsion valve group is communicated with the U port of the overflow assembly; the overflow assembly is connected with the pressure limiting valve in parallel.
4. A hydraulic propulsion system according to claim 3 wherein the control assembly and the overflow assembly are integrated.
5. The hydrokinetic propulsion system of the jumbolter of claim 3, wherein the pressure regulating module further comprises:
and the overflow valve is connected with the overflow assembly in series and is connected between the overflow assembly and the U port of the propulsion valve group.
6. A hydraulic propulsion system according to claim 3, wherein the cross-sectional area between the active surfaces of the pistons is three times the area of the spool.
7. The hydraulic propulsion system of a roof bolter of claim 3, wherein the piston comprises a first small diameter section, a large diameter section and a second small diameter section which are sequentially connected, two ends of the large diameter section are respectively provided with two acting surfaces of the piston, the second small diameter section can be propped against the valve core, and the diameter of the second small diameter section is the same as the diameter of the valve core.
8. The hydrokinetic propulsion system of the jumbolter of claim 3, wherein the pressure regulating module further comprises:
the one-way valve is connected with the throttling piece in parallel, and the conduction direction of the one-way valve is from the outlet of the throttling piece to the inlet of the throttling piece.
9. The hydrokinetic thrust system of a roof bolter of any of claims 1 to 8, wherein the throttle is a plurality and any of the throttles is connected in series between the thrust valve block and a rodless cavity of the thrust cylinder, and the throttles in series are in communication with the pressure regulating module.
10. A roof bolter comprising a hydraulic propulsion system, wherein the hydraulic propulsion system is as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311367811.0A CN117646750B (en) | 2023-10-20 | Roofbolter and hydraulic propulsion system thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311367811.0A CN117646750B (en) | 2023-10-20 | Roofbolter and hydraulic propulsion system thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117646750A true CN117646750A (en) | 2024-03-05 |
| CN117646750B CN117646750B (en) | 2024-07-12 |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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