CN214837444U - Hydraulic system of anchor rod machine and anchor rod machine - Google Patents
Hydraulic system of anchor rod machine and anchor rod machine Download PDFInfo
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- CN214837444U CN214837444U CN202120472631.9U CN202120472631U CN214837444U CN 214837444 U CN214837444 U CN 214837444U CN 202120472631 U CN202120472631 U CN 202120472631U CN 214837444 U CN214837444 U CN 214837444U
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Abstract
The utility model discloses an anchor rod machine hydraulic system and anchor rod machine relates to hydraulic equipment technical field, and the main objective realizes anchor rod machine hydraulic system's high-low speed switching under the prerequisite of not adjusting the multiple unit valve flow. The hydraulic system of the anchor rod machine comprises a pump station; the working oil port of the multi-way valve is connected with an actuating element; the speed regulating valve group comprises a first reversing valve and a one-way throttle valve, and a first oil outlet and a second oil outlet of the first reversing valve are respectively communicated with a first oil inlet of the multi-way valve; an inlet of the one-way throttle valve is communicated with the pump station, a second oil inlet is communicated with the pump station through a pipeline, and an outlet of the one-way throttle valve is communicated with a third oil inlet of the first reversing valve; the first station is arranged in a way that the second oil inlet is communicated with the first oil outlet when the first station is opened; the second station is set to be communicated with the second oil outlet through a third oil inlet when the valve is opened.
Description
Technical Field
The utility model belongs to the technical field of the hydraulic equipment technique and specifically relates to a stock machine hydraulic system and stock machine are related to.
Background
At present, the anchor rod machine positioning drilling hole is generally remotely operated through the same group of multi-way valves, and the operation safety is improved.
However, during remote control operation, because the opening of the valve core of the multi-way valve set cannot be controlled by the remote controller to linearly change, the speed is too high when the bolting machine is finely adjusted and positioned, accurate positioning is difficult to realize, repeated positioning is needed, and the working efficiency is reduced; and, when carrying out the fine motion and drawing a design and punching a hole after the location is confirmed, the stock machine rotation speed is very fast easily leads to the drilling position to take place the skew, if the flow reduction rate through adjusting the multichannel valves, though can ensure that the position in hole does not take place the skew when drawing a design and punching a hole, nevertheless it is lower not only to creep into work efficiency at the stock machine drilling in-process, and the drilling rod easily takes place bending deformation, lead to the drilling rod can't bore rock or coal seam, and simultaneously, the stock machine fast and the slow speed switch all need adjust the multichannel valve at every turn, and the operation is time-consuming, and the work efficiency is reduced.
SUMMERY OF THE UTILITY MODEL
In view of this, the embodiment of the utility model provides an anchor rod machine hydraulic system and anchor rod machine, the main objective realizes under the prerequisite of not adjusting the multiple unit valve flow, realizes anchor rod machine hydraulic system's high-low speed switching.
In order to achieve the above object, the embodiment of the present invention mainly provides the following technical solutions:
on the one hand, the embodiment of the utility model provides an anchor rod machine hydraulic system, include:
a pump station;
the multi-way valve comprises a first oil inlet and a working oil port, and the working oil port is connected with an executing element;
the speed regulating valve group comprises a first reversing valve and a one-way throttle valve, the first reversing valve comprises a second oil inlet, a third oil inlet, a first oil outlet and a second oil outlet, and the first oil outlet and the second oil outlet are respectively communicated with the first oil inlet; an inlet of the one-way throttle valve is communicated with the pump station, the second oil inlet is communicated with the pump station through a pipeline, and an outlet of the one-way throttle valve is communicated with the third oil inlet;
the first reversing valve is provided with a first station and a second station;
the first station is set to be opened, and the second oil inlet is communicated with the first oil outlet;
the second station is set to be opened, and the third oil inlet is communicated with the second oil outlet.
Further, the one-way throttle valve includes an orifice that communicates with an outlet of the one-way throttle valve; the opening degree of the throttling opening can be adjusted.
Further, the bolter hydraulic system still includes:
the second reversing valve comprises a fourth oil inlet, an oil return port and a third oil outlet;
the first reversing valve further comprises a pilot liquid through port, and the pilot liquid through port is communicated with the third oil outlet;
the second reversing valve has a third station and a fourth station;
the third station is set to be opened, the fourth oil inlet is communicated with the third oil outlet, and the first station is opened;
and the fourth station is set to be opened, and the oil return port is communicated with the third oil outlet to open the second station.
Further, the multi-way valve further comprises a fourth oil outlet, and the fourth oil outlet is communicated with the fourth oil inlet.
Further, the second reversing valve is a remote control valve.
Further, the speed regulating valve group comprises a fifth oil inlet and a fifth oil outlet;
an inlet of the one-way throttle valve is connected with the pump station through the fifth oil inlet;
the pipeline is communicated with the fifth oil inlet;
the first oil outlet and the second oil outlet are respectively communicated with the first oil inlet through the fifth oil outlet.
Furthermore, the second reversing valve is an electromagnetic reversing valve, and the electromagnetic reversing valve is a two-position four-way electromagnetic reversing valve.
Further, the first reversing valve is a two-position four-way reversing valve.
On the other hand, the embodiment of the utility model provides a still provide an anchor rod machine, including aforementioned anchor rod machine hydraulic system.
Further, the executing element comprises a bolter body, a propelling oil cylinder, a swinging oil cylinder and a rotating oil cylinder;
the working oil ports comprise a first working oil port, a second working oil port, a third working oil port and a fourth working oil port;
the anchor rod machine body is connected with the first working oil port, the pushing oil cylinder is connected with the second working oil port, the swinging oil cylinder is connected with the third working oil port, and the rotating oil cylinder is connected with the fourth working oil cylinder.
Borrow by above-mentioned technical scheme, the utility model discloses following beneficial effect has at least:
in the technical scheme provided by the embodiment of the utility model, when the first reversing valve is in the first station in the switching speed regulating valve group, the second oil inlet and the first oil outlet of the first reversing valve are communicated, so that the first oil inlet of the multi-way valve is directly communicated with the pump station through a pipeline, at the moment, no throttling exists in the speed regulating valve group, all oil flowing into the speed regulating valve group from the pump station can be conveyed to an executing element through the multi-way valve, and at the moment, the quick propelling drilling and the quick moving positioning hole searching of the bolting machine can be realized; when the first reversing valve is switched to be positioned at the second station, the third oil inlet of the first reversing valve is communicated with the second oil outlet so as to enable the first oil inlet to be communicated with the pump station through the one-way throttle valve, the oil flowing into the speed regulating valve group is throttled through the one-way throttle valve at the moment, the oil flowing into the speed regulating valve group cannot completely flow to the first oil inlet of the multi-way valve, so that the flow rate of the multi-way valve conveyed to an execution element is insufficient, the speed of the execution element is reduced, the slow fine tuning positioning hole searching and the slow sampling punching hole punching of the anchor rod machine can be realized at the moment, and the flow rate of the multi-way valve does not need to be adjusted, namely, the technical scheme provided by the embodiment of the utility model can realize the fast rough positioning of the anchor rod machine by greatly moving under the premise of not adjusting the flow rate of the multi-way valve by switching the station of the first reversing valve, can also be switched to the slow fine tuning positioning, the sample punching hole punching of the anchor rod machine can be slowly rotated, and the drilling can be quickly propelled by switching, so that the operation is simple, the time is saved, and the working efficiency is improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
fig. 1 is a schematic structural diagram of a hydraulic system of a bolting machine according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of the speed regulating valve group in fig. 1.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below with reference to the drawings in the preferred embodiments of the present invention. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are only some, but not all embodiments of the invention. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention. Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
In the description of the present embodiment, it is to be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore, should not be construed as limiting the scope of the present embodiment.
As shown in fig. 1 and 2, an embodiment of the present invention provides a hydraulic system of a bolting machine, including a pump station 1; the multi-way valve 2 (which can be operated manually), the multi-way valve 2 comprises a first oil inlet P2 and a working oil port, the working oil port is connected with an actuating element, and the actuating element can comprise at least one of a bolter body 5, a propulsion oil cylinder 6, a swing oil cylinder 7 and a rotating oil cylinder 8; the speed regulating valve group 3 comprises a first reversing valve 31 and a one-way throttle valve 32, the one-way throttle valve 32 comprises a one-way valve and a throttle valve which are connected in parallel, the first reversing valve 31 comprises a second oil inlet a1, a third oil inlet a3, a first oil outlet a2 and a second oil outlet a4, and the first oil outlet a2 and the second oil outlet a4 are respectively communicated with a first oil inlet P2; an inlet X of the one-way throttle valve 32 is communicated with the pump station 1, a second oil inlet a1 is communicated with the pump station 1 through a pipeline 9, an outlet of the one-way throttle valve 32 is communicated with a third oil inlet a3, and the first reversing valve 31 is provided with a first station and a second station; when the first reversing valve 31 is in the first station, the second oil inlet a1 is communicated with the first oil outlet a2, and the first oil inlet P2 is communicated with the pump station 1 through the pipeline 9; when the first reversing valve 31 is in the second station, the third oil inlet a3 is communicated with the second oil outlet a4, and the first oil inlet P2 is communicated with the pump station 1 through the one-way throttle valve 32.
In the hydraulic system of the bolting machine provided by the embodiment of the utility model, when a first reversing valve is positioned at a first station in a switching speed regulating valve group, a second oil inlet and a first oil outlet of the first reversing valve are communicated so as to enable a first oil inlet of a multi-way valve to be directly communicated with a pump station through a pipeline, no throttling exists in the speed regulating valve group at the moment, oil flowing into the speed regulating valve group from the pump station can be completely conveyed to an executing element through the multi-way valve, and quick propelling drilling and quick moving positioning hole searching of the bolting machine can be realized at the moment; when the first reversing valve is switched to be positioned at the second station, the third oil inlet of the first reversing valve is communicated with the second oil outlet so as to enable the first oil inlet to be communicated with the pump station through the one-way throttle valve, the oil flowing into the speed regulating valve group is throttled through the one-way throttle valve at the moment, the oil flowing into the speed regulating valve group cannot completely flow to the first oil inlet of the multi-way valve, so that the flow rate of the multi-way valve conveyed to an execution element is insufficient, the speed of the execution element is reduced, the slow fine tuning positioning hole searching and the slow sampling punching hole punching of the anchor rod machine can be realized at the moment, and the flow rate of the multi-way valve does not need to be adjusted, namely, the technical scheme provided by the embodiment of the utility model can realize the fast rough positioning of the anchor rod machine by greatly moving under the premise of not adjusting the flow rate of the multi-way valve by switching the station of the first reversing valve, can also be switched to the slow fine tuning positioning, the sample punching hole punching of the anchor rod machine can be slowly rotated, and the drilling can be quickly propelled by switching, so that the operation is simple, the time is saved, and the working efficiency is improved.
It should be noted that, when the first direction valve 31 is located at the first station, the operating speed of the actuator is determined by the opening degree of the multi-way valve 2, therefore, before the operation, the multi-way valve 2 can be adjusted to the required opening degree according to the requirement of the working condition, so that the actuator can reach the required operating speed, and further the bolting machine can move the bolting machine by a large margin to perform quick rough positioning and quickly advance the drilling, and after the multi-way valve 2 is adjusted, the multi-way valve 2 is not adjusted any more in the whole operation process.
In the embodiment of the present invention, the opening of the one-way throttle valve 32 determines the execution speed of the execution element, and in order to improve the fine-tuning positioning accuracy of the bolting machine and ensure that the sample punching hole is not deviated, in an optional embodiment, the one-way throttle valve 32 includes a choke, which is communicated with the outlet of the one-way throttle valve 32; the opening degree of the throttling opening can be adjusted. Therefore, in the operation process, the opening of the throttling opening of the one-way throttle valve 32 can be gradually adjusted until the fine adjustment positioning and the slow sampling and punching speed of the executing element are adjusted to be suitable for the required working condition, and after the one-way throttle valve 32 is adjusted, the low-speed hydraulic system of the anchor rod machine is established, so that the operation is convenient, and the precision is high.
In an optional embodiment, the hydraulic system of the bolter may further include a second direction valve, and the second direction valve 4 includes a fourth oil inlet P0, an oil return T0, and a third oil outlet B0; the first reversing valve 31 can further comprise a pilot liquid through port K1, and the pilot liquid through port K1 is communicated with the third oil outlet B0; the second reversing valve 4 has a third station and a fourth station; when the second reversing valve 4 is in the third station, the fourth oil inlet P0 is communicated with the third oil outlet B0, so that the second oil inlet a1 is communicated with the first oil outlet a 3; when the second reversing valve 4 is in the fourth position, the oil return port T0 is communicated with the third oil outlet B0, so that the third oil inlet a3 is communicated with the second oil outlet a 4.
In the above embodiment, the first direction valve 31 in the speed regulating valve group 3 may be a pilot operated direction valve, and when the second direction valve 4 is in the third position, the fourth oil inlet P0 is communicated with the third oil outlet B0, external oil can flow to the pilot liquid through port K1 of the first reversing valve through the fourth oil inlet P0 and the third oil outlet B0, the pressure of the pilot liquid through port K1 of the first reversing valve 31 is not zero, so that the second oil inlet a1 and the first oil outlet a2 of the first reversing valve 31 are communicated, so that the first oil inlet P2 of the multi-way valve 2 is directly communicated with the pump station 1 through the pipeline 9, in the process, the speed regulating valve group 3 has no throttling, the flow of the oil flowing into the speed regulating valve group 3 is the same as that of the oil flowing out of the speed regulating valve group 3, and if the loss of the oil along the process is ignored, the flow output by the pump station 1 can be completely transmitted to an execution element through the speed regulating valve group 3 and the multi-way valve 2; when the second reversing valve 4 is in the fourth position, the oil return port T0 is communicated with the third oil outlet B0, so that the pilot liquid through port K1 of the first reversing valve is communicated with the oil return port T0, the oil return port T0 is communicated with the oil tank, at this time, the pressure of the pilot liquid through port K1 of the first reversing valve 31 is zero, the other end of the first reversing valve 31 is reset by a spring of the first reversing valve 31, so that the third oil inlet a3 is communicated with the second oil outlet a4, so that the oil output by the pump station 1 needs to flow to the multi-way valve 2 after throttling by the one-way throttle valve 32, and the working speed of the actuating element is reduced.
In the above embodiment, by arranging the second reversing valve 4, an operator can switch the high-speed and the low-speed of the hydraulic system by switching the station of the second reversing valve 4 without switching the station of the first reversing valve 31 in the speed regulating valve group 3, and the operation is simpler and more convenient.
In an alternative embodiment, the multi-way valve may further comprise a fourth oil outlet Z, and the fourth oil outlet Z is communicated with a fourth oil inlet P0 of the second direction valve 4. In this embodiment, the second reversing valve 4 is supplied with oil through the fourth oil outlet Z of the multi-way valve 2, so that when the second reversing valve 4 is located at the fourth station, the fourth oil outlet Z of the multi-way valve 2 supplies oil to the pilot liquid through port K1 of the first reversing valve 31 through the second reversing valve 4, and an external oil supply mode is not needed to supply oil to the second reversing valve 4, which not only can reduce the cost, but also can save the occupied space of the hydraulic system.
In an optional embodiment, the second reversing valve 4 may be a remote control valve, so that the switching between the high speed and the low speed of the hydraulic system of the bolting machine can be remotely switched, the operation safety of constructors is improved, and the operation is simple and convenient.
In an alternative embodiment, referring to fig. 1 and 2, the speed valve group 3 may include a fifth oil inlet P and a fifth oil outlet P1; an inlet X of the one-way throttle valve 32 is connected with the pump station 1 through a fifth oil inlet P; the pipeline 9 is also communicated with the fifth oil inlet P, and the first oil outlet a2 and the second oil outlet a4 are respectively communicated with the first oil inlet P2 through the fifth oil outlet P1, so that the oil output from the pump station 1 flows into the speed regulating valve group 3, and the oil flows from the speed regulating valve group 3 to the multi-way valve 2.
In an alternative embodiment, the second direction valve 4 may be an electromagnetic direction valve, and the electromagnetic direction valve may be a two-position four-way electromagnetic direction valve, so that the switching between the high speed and the low speed of the hydraulic system of the bolter may be achieved by controlling the electromagnetic direction valve, specifically, referring to fig. 1, after the pump station 1 is started, a button of the electromagnetic direction valve is pressed, the electromagnetic direction valve is in the third station, the fourth oil inlet P0 port is communicated with the third oil outlet B0 port, and further, the fourth oil outlet Z of the multi-way valve 2 is communicated with the pilot liquid through port K1 of the first direction valve 31; the button of the electromagnetic reversing valve is pressed to reset, the electromagnetic reversing valve is located at a fourth station, an oil return port T0 is communicated with a third oil outlet B0, a pilot liquid through port K1 of the first reversing valve 31 is communicated with an oil return port T0 of the second reversing valve 4, the pressure of the pilot liquid through port K1 of the first reversing valve 31 is zero at the moment, the other end of the first reversing valve 31 is reset through a spring of the first reversing valve 31, so that the third oil inlet a3 is communicated with the second oil outlet a4, and the operation is simple and convenient.
In an optional embodiment, the first reversing valve 31 in the speed regulating valve group 3 can be a two-position four-way hydraulic control reversing valve, so that the use is more convenient.
In an alternative embodiment, a pipeline may be led out from the outlet end of the one-way throttle valve 32, and a pressure gauge may be arranged on the pipeline, and the pressure gauge may be used to detect the system pressure so as to prompt an operator whether the system has a fault, so that the use is more convenient.
The embodiment of the utility model provides a still provide an anchor rod machine, including aforementioned anchor rod machine hydraulic system.
The embodiment of the utility model provides a roof bolter, including roof bolter hydraulic system, among this hydraulic system, when switching over the first switching-over valve in the speed governing valves and being in first station, the second oil inlet and the first oil-out of first switching-over valve communicate to make the first oil inlet of multiple unit valve directly communicate with the pump station through the pipeline, do not have the throttle in the speed governing valves this moment, the fluid that flows into the speed governing valves from the pump station can all be carried to the executive component through the multiple unit valve, can realize the quick propulsion drilling and the quick removal location of roof bolter this moment and seek the hole; when the first reversing valve is switched to be positioned at the second station, the third oil inlet of the first reversing valve is communicated with the second oil outlet so as to enable the first oil inlet to be communicated with the pump station through the one-way throttle valve, the oil flowing into the speed regulating valve group is throttled through the one-way throttle valve at the moment, the oil flowing into the speed regulating valve group cannot completely flow to the first oil inlet of the multi-way valve, so that the flow rate of the multi-way valve conveyed to an execution element is insufficient, the speed of the execution element is reduced, the slow fine tuning positioning hole searching and the slow sampling punching hole punching of the anchor rod machine can be realized at the moment, and the flow rate of the multi-way valve does not need to be adjusted, namely, the technical scheme provided by the embodiment of the utility model can realize the fast rough positioning of the anchor rod machine by greatly moving under the premise of not adjusting the flow rate of the multi-way valve by switching the station of the first reversing valve, can also be switched to the slow fine tuning positioning, the sample punching hole punching of the anchor rod machine can be slowly rotated, and the drilling can be quickly propelled by switching, so that the operation is simple, the time is saved, and the working efficiency is improved.
In an alternative embodiment, the actuating elements may include the bolter body 5, the thrust cylinder 6, the swing cylinder 7, and the rotation cylinder 8; the working oil ports of the multi-way valve 2 can comprise a first working oil port, a second working oil port, a third working oil port and a fourth working oil port; the anchor rod machine body 5 is connected with the first working oil port, the pushing oil cylinder 6 is connected with the second working oil port, the swinging oil cylinder 7 is connected with the third working oil port, and the rotating oil cylinder 8 is connected with the fourth working oil cylinder.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (10)
1. A bolter hydraulic system, comprising:
a pump station;
the multi-way valve comprises a first oil inlet and a working oil port, and the working oil port is connected with an executing element;
the speed regulating valve group comprises a first reversing valve and a one-way throttle valve, the first reversing valve comprises a second oil inlet, a third oil inlet, a first oil outlet and a second oil outlet, and the first oil outlet and the second oil outlet are respectively communicated with the first oil inlet; an inlet of the one-way throttle valve is communicated with the pump station, the second oil inlet is communicated with the pump station through a pipeline, and an outlet of the one-way throttle valve is communicated with the third oil inlet;
the first reversing valve is provided with a first station and a second station;
the first station is set to be opened, and the second oil inlet is communicated with the first oil outlet;
the second station is set to be opened, and the third oil inlet is communicated with the second oil outlet.
2. The bolter hydraulic system as recited in claim 1,
the one-way throttle valve comprises a throttle orifice which is communicated with an outlet of the one-way throttle valve;
the opening degree of the throttling opening can be adjusted.
3. The bolter hydraulic system as recited in claim 1, further comprising:
the second reversing valve comprises a fourth oil inlet, an oil return port and a third oil outlet;
the first reversing valve further comprises a pilot liquid through port, and the pilot liquid through port is communicated with the third oil outlet;
the second reversing valve has a third station and a fourth station;
the third station is set to be opened, the fourth oil inlet is communicated with the third oil outlet, and the first station is opened;
and the fourth station is set to be opened, and the oil return port is communicated with the third oil outlet to open the second station.
4. The bolter hydraulic system as recited in claim 3,
the multi-way valve further comprises a fourth oil outlet, and the fourth oil outlet is communicated with the fourth oil inlet.
5. The bolter hydraulic system as recited in claim 3,
the second reversing valve is a remote control valve.
6. The bolter hydraulic system as recited in claim 1,
the speed regulating valve group comprises a fifth oil inlet and a fifth oil outlet;
an inlet of the one-way throttle valve is connected with the pump station through the fifth oil inlet;
the pipeline is communicated with the fifth oil inlet;
the first oil outlet and the second oil outlet are respectively communicated with the first oil inlet through the fifth oil outlet.
7. The bolter hydraulic system as recited in claim 3,
the second reversing valve is an electromagnetic reversing valve, and the electromagnetic reversing valve is a two-position four-way electromagnetic reversing valve.
8. The bolter hydraulic system as recited in claim 1,
the first reversing valve is a two-position four-way reversing valve.
9. A bolter, comprising:
the bolter hydraulic system as defined in any one of claims 1 to 8.
10. The bolter of claim 9,
the executing element comprises an anchor rod machine body, a propelling oil cylinder, a swinging oil cylinder and a rotating oil cylinder;
the working oil ports comprise a first working oil port, a second working oil port, a third working oil port and a fourth working oil port;
the anchor rod machine body is connected with the first working oil port, the pushing oil cylinder is connected with the second working oil port, the swinging oil cylinder is connected with the third working oil port, and the rotating oil cylinder is connected with the fourth working oil cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120472631.9U CN214837444U (en) | 2021-03-04 | 2021-03-04 | Hydraulic system of anchor rod machine and anchor rod machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120472631.9U CN214837444U (en) | 2021-03-04 | 2021-03-04 | Hydraulic system of anchor rod machine and anchor rod machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214837444U true CN214837444U (en) | 2021-11-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120472631.9U Active CN214837444U (en) | 2021-03-04 | 2021-03-04 | Hydraulic system of anchor rod machine and anchor rod machine |
Country Status (1)
| Country | Link |
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| CN (1) | CN214837444U (en) |
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2021
- 2021-03-04 CN CN202120472631.9U patent/CN214837444U/en active Active
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