CN217354977U - Power head hydraulic control system and drilling machine - Google Patents
Power head hydraulic control system and drilling machine Download PDFInfo
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- CN217354977U CN217354977U CN202221003805.8U CN202221003805U CN217354977U CN 217354977 U CN217354977 U CN 217354977U CN 202221003805 U CN202221003805 U CN 202221003805U CN 217354977 U CN217354977 U CN 217354977U
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Abstract
The utility model discloses a unit head hydraulic control system and rig, unit head hydraulic control system includes oil tank, oil pump, two first proportion switching-over valves and propulsion cylinder, the oil pump with the oil tank is connected, two first proportion switching-over valve all is provided with first oil inlet P1 and first oil return T1, one of them first proportion switching-over valve is provided with first working opening A1, another one first proportion switching-over valve is provided with first working opening B1, first oil inlet P1 with oil pump connection, first oil return T1 with the oil tank is connected, propulsion cylinder have the pole chamber with first working opening A1 is connected, propulsion cylinder's no pole chamber with first working opening B1 is connected. According to the utility model discloses a unit head hydraulic control system and rig, control original paper is less, and then makes whole control process comparatively simple, and control accuracy is higher.
Description
Technical Field
The utility model relates to a rig structure, in particular to unit head hydraulic control system and rig.
Background
As shown in fig. 1, a conventional power head hydraulic control system mainly includes an oil tank 100, a thrust pump 900, a thrust multi-way valve 904, and a thrust cylinder 400, where the thrust pump 900 is communicated with an oil inlet of the thrust multi-way valve 904, the oil tank 100 is communicated with an oil return port of the thrust multi-way valve 904, one working port of the thrust multi-way valve 904 is communicated with a rod cavity of the thrust cylinder 400, another working port of the thrust multi-way valve 904 is communicated with a rodless cavity of the thrust cylinder 400, and a piston rod of the thrust cylinder 400 is used for connecting the power head. The propulsion pump 900 delivers the oil into the rodless cavity, and when the oil in the rod cavity correspondingly flows back into the oil tank 100, the piston rod of the propulsion oil cylinder 400 can slide outwards to control the power head to move forwards, otherwise, the power head can be controlled to move backwards.
The existing power head hydraulic control system has the following disadvantages: in order to improve the stability of the power head when moving forward, a back pressure valve 901 needs to be arranged to generate a certain oil return resistance for the oil return of the propulsion cylinder 400. In order to adapt to different rock hardness, a proportional relief valve 902 is required to adjust the boost pressure. In order to facilitate the connection and disconnection of the drill rod, a floating solenoid valve 903 is needed to make the piston of the thrust cylinder 400 in a floating state when the drill rod is connected and disconnected. In conclusion, the conventional power head hydraulic control system has various control elements, so that the whole control process is complex and the control precision is low.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the first aspect the utility model provides a unit head hydraulic control system, the control original paper is less, and then makes whole control process comparatively simple, and control accuracy is higher.
Furthermore, the second aspect the utility model discloses still provide a be provided with unit head hydraulic control system's rig.
According to the utility model discloses unit head hydraulic control system of the first aspect embodiment, include:
an oil tank;
the oil pump is connected with the oil tank;
two first proportional reversing valves are respectively provided with a first oil inlet P1 and a first oil return port T1, one of the first proportional reversing valves is provided with a first working port A1, the other first proportional reversing valve is provided with a first working port B1, the first oil inlet P1 is connected with the oil pump, and the first oil return port T1 is connected with the oil tank;
and a rod cavity of the propulsion oil cylinder is connected with the first working port A1, and a rodless cavity of the propulsion oil cylinder is connected with the first working port B1.
According to the utility model discloses unit head hydraulic control system has following technological effect at least:
the piston rod of the propulsion oil cylinder can slide outwards or inwards by reversing the two first proportional reversing valves, and the piston rod of the propulsion oil cylinder can control the power head to move forwards or backwards. According to the utility model discloses unit head hydraulic control system, at first, first proportion switching-over valve can the proportional control flow, and then can adjust the pressure that impels hydro-cylinder oil feed end and return oil end, when the unit head gos forward, can adjust the first proportion switching-over valve that is connected with the pole chamber, so that the backward flow resistance improves, thereby can improve the stationarity that the unit head when gos forward, when rock hardness is higher, can adjust the first proportion switching-over valve of connecting no pole chamber, so that oil feed pressure improves, thereby can improve propulsion pressure. Secondly, when the drill rod needs to be connected and disconnected, the corresponding first proportional reversing valve is reversed, the rod cavity and the rodless cavity are communicated with the oil tank, oil pressure does not exist on two sides of the piston of the propulsion oil cylinder, the piston is in a floating state, and therefore the drill rod is convenient to connect and disconnect. The utility model discloses set up two first proportional reversing valves and can realize required a plurality of functions when the unit head back-and-forth movement, control original paper is less, and whole control process is comparatively simple, and control accuracy is higher.
According to the utility model discloses a some embodiments, unit head hydraulic control system still includes:
the two second proportional reversing valves are respectively provided with a second oil inlet P2 and a second oil return port T2, one of the second proportional reversing valves is provided with a second working port A2, the other second proportional reversing valve is provided with a second working port B2, the second oil inlet P2 is connected with the oil pump, and the second oil return port T2 is connected with the oil tank;
and one of the oil ports of the rotary motor is connected with the second working port A2, the other oil port of the rotary motor is connected with the second working port B2, and the rotary motor is in transmission connection with the power head so as to control the rotation of the power head.
According to some embodiments of the utility model, the oil pump is provided with total oil inlet pipe, first oil inlet P1 with second oil inlet P2 all connects total oil inlet pipe, the oil tank is provided with total oil return pipe, first oil return port T1 with second oil return port T2 all connects total oil return pipe.
According to some embodiments of the utility model, first proportional reversing valve with second proportional reversing valve all is connected with the pilot valve, the pilot valve is used for controlling first proportional reversing valve or the operation of second proportional reversing valve.
According to the utility model discloses a some embodiments, always advance oil pipe with always return and be provided with the load feedback valve between the oil pipe, the load feedback valve with oil pump connection.
According to some embodiments of the invention, the load feedback valve is connected to the pilot valve.
According to the utility model discloses a some embodiments, always advance oil pipe and be provided with the oil delivery pipe, the oil delivery pipe is provided with the relief pressure valve, the pilot valve set up in the oil delivery pipe with always return between the oil pipe, and follow the direction of delivery of oil delivery pipe, the pilot valve is located the rear of relief pressure valve.
According to some embodiments of the invention, a filter is provided between the pilot valve and the oil delivery pipe.
According to the utility model discloses a some embodiments, unit head hydraulic control system is provided with the valve body, the case of first proportion switching-over valve the case of second proportion switching-over valve the case of pilot valve the case of load feedback valve and the case of relief pressure valve all install in the valve body.
According to the utility model discloses the rig of second aspect embodiment is provided with the basis the utility model discloses the first aspect embodiment the unit head hydraulic control system.
According to the utility model discloses rig has following technological effect at least:
a plurality of functions required by the forward and backward movement of the power head can be realized by arranging two first proportional reversing valves, fewer control elements are needed, the whole control process is simpler, and the control precision is higher.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic diagram of a conventional hydraulic control system for a power head;
FIG. 2 is a schematic view of the overall structure of the present invention;
FIG. 3 is a schematic diagram of hydraulic control of the propulsion cylinder;
FIG. 4 is a schematic diagram of the hydraulic control of the swing motor;
FIG. 5 is a schematic view of one of the first proportional reversing valves;
FIG. 6 is a schematic view of one of the second proportional reversing valves;
reference numerals:
an oil tank 100, a main oil return pipe 101; an oil pump 200, a main oil inlet pipe 201, a load feedback valve 202, an oil delivery pipe 203, a pressure reducing valve 204 and a filter 205; a first proportional reversing valve 300; a thrust cylinder 400; a second proportional reversing valve 500; a swing motor 600; a pilot valve 700; a valve body 800; a boost pump 900, a back pressure valve 901, a proportional overflow valve 902, a float solenoid valve 903, and a boost multi-way valve 904.
Detailed Description
Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, merely for convenience of description and simplification of the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more than two, and "a plurality" means two or more than two unless otherwise specified.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The following describes a power head hydraulic control system and a drilling machine according to an embodiment of the present invention with reference to fig. 2 to 6. The drill of the utility model can be a down-the-hole drill or other common drills needing to use a drill rod.
According to the utility model discloses unit head hydraulic control system of first aspect embodiment, as shown in fig. 2 and 3, include:
a fuel tank 100;
an oil pump 200 connected to the oil tank 100;
two first proportional directional control valves 300, each of which is provided with a first oil inlet P1 and a first oil return port T1, wherein one of the first proportional directional control valves 300 is provided with a first working port a1, the other first proportional directional control valve 300 is provided with a first working port B1, the first oil inlet P1 is connected with the oil pump 200, and the first oil return port T1 is connected with the oil tank 100;
the rod chamber of the propulsion cylinder 400 is connected to the first working port a1 of one of the first proportional directional valves 300, and the rodless chamber of the propulsion cylinder 400 is connected to the first working port B1 of the other first proportional directional valve 300.
In this embodiment, the piston rod of the thrust cylinder 400 can be slid outward or inward by reversing the two first proportional reversing valves 300, and the piston rod of the thrust cylinder 400 can thereby control the power head to move forward or backward. According to the utility model discloses unit head hydraulic control system, at first, first proportion switching-over valve 300 can the proportional control flow, and then can adjust thrust cylinder 400 oil feed end and the pressure that returns the oil end, for example, when the unit head gos forward, can adjust the first proportion switching-over valve 300 that is connected with the pole chamber, so that the backward flow resistance improves, thereby can improve the stationarity when the unit head gos forward, when rock hardness is higher, can adjust the first proportion switching-over valve 300 of connecting no pole chamber, so that oil feed pressure improves, thereby can improve propulsive pressure. Secondly, when the drill rod needs to be connected and disconnected, the corresponding first proportional reversing valve 300 is reversed, so that the rod cavity and the rodless cavity are communicated with the oil tank 100, oil pressure does not exist on two sides of the piston of the propulsion oil cylinder 400, the piston is in a floating state, and the drill rod is convenient to connect and disconnect. The utility model discloses set up two first proportional reversing valve 300 and can realize required a plurality of functions when the unit head back-and-forth movement, the control original paper is less, and whole control process is comparatively simple, and control accuracy is higher.
An oil inlet end of the oil pump 200 is connected to the oil tank 100, and an oil outlet end of the oil pump 200 is connected to the first oil inlet P1 of the first proportional directional control valve 300. In the two first proportional directional control valves 300, the first working port B1 of the first proportional directional control valve 300 is connected with the rodless cavity of the thrust cylinder 400, the first working port a1 of the second first proportional directional control valve 300 is connected with the rod cavity of the thrust cylinder 400, the oil pump 200 inputs oil into the rodless cavity of the thrust cylinder 400 through the first proportional directional control valve 300, and the oil in the rod cavity of the thrust cylinder 400 flows back into the oil tank 100 through the second first proportional directional control valve 300, so that the piston rod of the thrust cylinder 400 slides outwards to push the power head to move forwards. After the two first proportional directional valves 300 are reversed, the oil pump 200 inputs oil into the rod cavity of the propulsion oil cylinder 400 through the second first proportional directional valve 300, and the oil in the rodless cavity of the propulsion oil cylinder 400 flows back into the oil tank 100 through the first proportional directional valve 300, so that the piston rod of the propulsion oil cylinder 400 slides inwards to drive the power head to retreat, and the forward and backward movement of the power head is realized. The first proportional reversing valve 300 may be a three-position, three-way reversing valve. Proportional reversing valve is the more common valve in hydraulic system, can commutate and adjust flow, just the utility model discloses do not improve proportional reversing valve's structure, consequently first proportional reversing valve 300's structure and theory of operation are no longer repeated here.
In some embodiments of the present invention, as shown in fig. 2, fig. 4 and fig. 6, the power head hydraulic control system further includes two second proportional directional control valves 500 and a rotary motor 600, the two second proportional directional control valves 500 are both provided with a second oil inlet P2 and a second oil return port T2, one of the second proportional directional control valves 500 is provided with a second working port a2, the other second proportional directional control valve 500 is provided with a second working port B2, the second oil inlet P2 is connected with the oil pump 200, the second oil return port T2 is connected with the oil tank 100, one of the oil ports of the rotary motor 600 is connected with the second working port a2 of the one of the second proportional directional control valves 500, the other oil port of the rotary motor 600 is connected with the second working port B2 of the other second proportional directional control valve 500, and the rotary motor 600 is in transmission connection with the power head for controlling the rotation of the power head. When the power head drills, the power head needs to move back and forth, and also needs to rotate around the axis of the power head, the power head is generally driven by the rotary motor 600, the rotary motor 600 is generally provided with two oil ports, when the first oil port is used for feeding oil, and the second oil port is used for discharging oil, the power head can be controlled to rotate towards one direction, and when the second oil port is used for feeding oil, and the first oil port is used for discharging oil, the power head can be controlled to rotate towards the other direction. In this embodiment, similar with propulsion cylinder 400, set up two second proportional reversing valves 500, not only can control the direction of rotation of unit head, can control the rotation moment of torsion of unit head moreover, in addition, an oil pump 200 can control propulsion cylinder 400 and swing motor 600 operation, compares in controlling respectively through two pumps, and the structure is simpler, and it is more convenient to use, and the practicality is better. It should be noted that the structure and operation of the second proportional directional valve 500 are the same as those of the first proportional directional valve 300, and therefore, the detailed description thereof is omitted.
In some embodiments of the present invention, as shown in fig. 2 to fig. 6, the oil pump 200 is provided with a main oil inlet pipe 201, the main oil inlet pipe 201 is connected to the first oil inlet P1 and the second oil inlet P2, the oil tank 100 is provided with a main oil return pipe 101, and the main oil return pipe 101 is connected to the first oil return port T1 and the second oil return port T2. In this embodiment, set up and always advance oil pipe 201 and can carry fluid to first proportional reversing valve 300 and second proportional reversing valve 500 in, set up and always return oil pipe 101 and can make fluid among first proportional reversing valve 300 and the second proportional reversing valve 500 flow back to in the oil tank 100, and need not set up a plurality of pipelines, the structure is simpler, and it is more convenient to overhaul. It should be noted that a working port of the first proportional directional valve 300 is provided with a first connection pipe connected to the thrust cylinder 400, a working port of the second proportional directional valve 500 is provided with a second connection pipe connected to the swing motor 600, and safety valves may be provided between the first connection pipe and the main oil return pipe 101 and between the second connection pipe and the main oil return pipe 101.
In some embodiments of the present invention, as shown in fig. 2 to 4, the first proportional directional valve 300 and the second proportional directional valve 500 are both connected with a pilot valve 700, and the pilot valve 700 is used to control the operation of the first proportional directional valve 300 or the second proportional directional valve 500. Specifically, when the pilot valve 700 is activated, the pilot valve 700 can control the operation of the corresponding first proportional directional valve 300 or second proportional directional valve 500. In this embodiment, the pilot valve 700 is provided, so that not only the operation of the first proportional directional valve 300 or the second proportional directional valve 500 is controlled more conveniently, but also the control precision is higher. It should be noted that the pilot valve 700 is a relatively common valve in the hydraulic system, and can control the operation of other valves, and the utility model discloses do not improve the structure of pilot valve 700, therefore the structure and the theory of operation of pilot valve 700 are no longer repeated herein.
In some embodiments of the present invention, as shown in fig. 2, a load feedback valve 202 is disposed between the main oil inlet pipe 201 and the main oil return pipe 101, and the load feedback valve 202 is connected to the oil pump 200. The load feedback valve 202 is generally provided with a pressure sensor, the pressure sensor can sense the hydraulic pressure in the hydraulic pipeline and transmit the sensed hydraulic pressure value to the load feedback valve 202, the load feedback valve 202 is connected with a variable control mechanism on the oil pump 200 and correspondingly feeds back the variable control mechanism, and the variable control mechanism of the oil pump 200 can further adjust the output power of the oil pump 200, so that the hydraulic pressure in the hydraulic pipeline reaches a proper range. It should be noted that the load feedback valve 202 is a valve that is commonly used in a hydraulic system, and the present invention does not improve the structure of the load feedback valve 202, so the structure and the operation principle of the load feedback valve 202 are not described herein again. A feedback line may be provided between the load feedback valve 202 and the variable control mechanism on the oil pump 200, and a safety valve may be provided between the feedback line and the main return pipe 101.
In some embodiments of the present invention, as shown in fig. 2, a pilot valve 700 is connected to the load feedback valve 202. In this embodiment, the operation of the load feedback valve 202 is also controlled by the pilot valve 700, which not only facilitates the use, but also improves the control accuracy.
In some embodiments of the present invention, as shown in fig. 2, the main oil inlet pipe 201 is provided with the oil delivery pipe 203, the oil delivery pipe 203 is provided with the pressure reducing valve 204, the pilot valve 700 is disposed between the oil delivery pipe 203 and the main oil return pipe 101, and along the conveying direction of the oil delivery pipe 203, the pilot valve 700 is located behind the pressure reducing valve 204. In this embodiment, the pilot valve 700 is controlled to operate through fluid, and the total oil inlet pipe 201 divides a part of fluid to enter into the oil feeding branch pipe 203, and delivers to the pilot valve 700 after reducing the pressure through the reducing valve 204, and then can avoid the hydraulic pressure that the pilot valve 700 received too big and cause the damage. The pilot valve 700 may be controlled to operate by other means, such as an electric pilot valve 700.
In some embodiments of the present invention, as shown in fig. 2 to 4, a filter 205 is disposed between the pilot valve 700 and the oil distribution pipe 203. The filter 205 is arranged, so that the oil is filtered before entering the pilot valve 700, and then impurities in the oil can be prevented from entering the pilot valve 700 to block the pilot valve 700.
In some embodiments of the present invention, as shown in fig. 2, the power head hydraulic control system is provided with a valve body 800, and the valve core of the first proportional directional valve 300, the valve core of the second proportional directional valve 500, the valve core of the pilot valve 700, the valve core of the load feedback valve 202, and the valve core of the pressure reducing valve 204 are all installed in the valve body 800. A plurality of case are installed and are formed the multiple unit valve in a valve body 800, and then hydraulic control system's structure is simple more compact, and the dismouting is more convenient.
According to the utility model discloses the rig of second aspect embodiment is provided with the basis the utility model discloses the unit head hydraulic control system of first aspect embodiment. The hydraulic control system of the power head is provided with the two first proportional reversing valves 300, so that a plurality of functions required by the forward and backward movement of the power head can be realized, fewer control elements are required, the whole control process is simpler, and the control precision is higher.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A power head hydraulic control system, comprising:
an oil tank;
the oil pump is connected with the oil tank;
two first proportional reversing valves are respectively provided with a first oil inlet P1 and a first oil return port T1, one of the first proportional reversing valves is provided with a first working port A1, the other first proportional reversing valve is provided with a first working port B1, the first oil inlet P1 is connected with the oil pump, and the first oil return port T1 is connected with the oil tank;
the rod cavity of the propulsion oil cylinder is connected with the first working port A1, and the rodless cavity of the propulsion oil cylinder is connected with the first working port B1.
2. The powerhead hydraulic control system of claim 1, further comprising:
two second proportional directional control valves are respectively provided with a second oil inlet P2 and a second oil return port T2, one of the second proportional directional control valves is provided with a second working port A2, the other second proportional directional control valve is provided with a second working port B2, the second oil inlet P2 is connected with the oil pump, and the second oil return port T2 is connected with the oil tank;
and one of the oil ports of the rotary motor is connected with the second working port A2, the other oil port of the rotary motor is connected with the second working port B2, and the rotary motor is in transmission connection with the power head so as to control the rotation of the power head.
3. The power head hydraulic control system of claim 2, wherein the oil pump is provided with a main oil inlet pipe, the first oil inlet P1 and the second oil inlet P2 are both connected with the main oil inlet pipe, the oil tank is provided with a main oil return pipe, and the first oil return port T1 and the second oil return port T2 are both connected with the main oil return pipe.
4. The power head hydraulic control system of claim 3, wherein the first proportional directional valve and the second proportional directional valve are both connected with a pilot valve, and the pilot valve is used for controlling the first proportional directional valve or the second proportional directional valve to operate.
5. The power head hydraulic control system of claim 4, wherein a load feedback valve is disposed between the main oil inlet pipe and the main oil return pipe, and the load feedback valve is connected to the oil pump.
6. The powerhead hydraulic control system of claim 5, wherein the load feedback valve is connected to the pilot valve.
7. The power head hydraulic control system of claim 6, wherein the main oil inlet pipe is provided with an oil delivery pipe provided with a pressure reducing valve, and the pilot valve is provided between the oil delivery pipe and the main oil return pipe and located behind the pressure reducing valve in a conveying direction of the oil delivery pipe.
8. The powerhead hydraulic control system of claim 7, wherein a filter is disposed between the pilot valve and the oil delivery line.
9. The power head hydraulic control system of claim 7, wherein the power head hydraulic control system is provided with a valve body, and the valve spool of the first proportional directional valve, the valve spool of the second proportional directional valve, the valve spool of the pilot valve, the valve spool of the load feedback valve, and the valve spool of the pressure reducing valve are all mounted in the valve body.
10. A drilling rig, characterized in that a power head hydraulic control system according to any one of claims 1-9 is provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221003805.8U CN217354977U (en) | 2022-04-27 | 2022-04-27 | Power head hydraulic control system and drilling machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221003805.8U CN217354977U (en) | 2022-04-27 | 2022-04-27 | Power head hydraulic control system and drilling machine |
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| Publication Number | Publication Date |
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| CN217354977U true CN217354977U (en) | 2022-09-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202221003805.8U Active CN217354977U (en) | 2022-04-27 | 2022-04-27 | Power head hydraulic control system and drilling machine |
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| CN (1) | CN217354977U (en) |
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2022
- 2022-04-27 CN CN202221003805.8U patent/CN217354977U/en active Active
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