Roof bolter drilling and retreating control system and digging and anchoring complete equipment

Abstract

The invention discloses a roof bolter drilling and retreating control system and digging and anchoring complete equipment, comprising a manual hydraulic control proportional multi-way valve, an automatic drilling and retreating control valve group, a drilling motor, a stroke valve and a working oil cylinder, the manual hydraulic control proportional multi-way valve comprises a control oil way, a first hydraulic control valve group and a second hydraulic control valve group, the stroke valve is connected with the drilling motor and the automatic drilling and retreating control valve set, and the automatic drilling and retreating control valve set is used for conveying control oil to a hydraulic control port of the first hydraulic control valve set and a working inlet hydraulic control port of the second hydraulic control valve set so as to maintain the automatic drilling state. Or the control oil is respectively conveyed to the hydraulic control port of the first hydraulic control valve group and the working return hydraulic control port of the second hydraulic control valve group so as to activate and maintain the automatic drill return state, or the control oil is conveyed to the oil tank so as to activate and maintain the drill stop state; the roof bolter can be controlled to automatically drill, automatically retreat after automatic drilling is completed and automatically stop drilling after automatic retreat is completed, the automation degree is high, the labor intensity of workers is low, and the operation efficiency of the roof bolter is high.

Description

Technical Field

[0001] This invention relates to the field of coal mine construction technology, and in particular, to a control system for a bolting machine's drilling and retraction. Furthermore, this invention also relates to a complete set of bolting and excavation equipment including the aforementioned bolting machine's drilling and retraction control system. Background Technology

[0002] The complete set of tunneling and anchoring equipment mainly includes an integrated tunneling and anchoring machine, a hydraulic anchor bolt trolley for coal mines, and a belt conveyor for coal mines. The integrated tunneling and anchoring machine completes the coal breaking and loading processes, and also provides roof and sidewall anchor bolt support; the hydraulic anchor bolt trolley completes the remaining roof anchor bolt support, anchor cable support, and uniform transfer; the belt conveyor transfers the coal to the belt conveyor, completing the continuous transportation process. During coal mine operations, the complete set of tunneling and anchoring equipment enables simultaneous tunneling, anchoring, and transfer in the working roadway, reducing the labor intensity and workload of workers and improving the efficiency of coal mining operations.

[0003] To further reduce the labor intensity of operators, Chinese invention patent application CN113494498A discloses a drilling control system for anchor bolting machines and an onboard anchor bolting machine. The control system includes a manual hydraulic proportional multi-way valve and an automatic drilling control valve group, with the multi-way valve comprising a first and a second valve body. When the first valve body switches to the working position, some oil flows through the first valve body and the first chamber to the second chamber, causing the drilling motor to rotate forward. After the oil flows into the first chamber, at least a portion of the oil enters the first hydraulic directional valve in the automatic drilling control valve group to switch the first hydraulic directional valve to the open position. When the second valve body switches to the working position, some oil enters the working cylinder, causing the working cylinder to advance. Another portion of the oil flows to the first hydraulic directional valve. When the first hydraulic directional valve is in the open position, at least a portion of the oil flowing from the second valve body to the first hydraulic directional valve flows back to the control chambers of the first and second valve bodies, keeping both the first and second valve bodies in the working position. This enables automated drilling and reduces the labor intensity of the workers.

[0004] However, in practical applications, after drilling is completed, workers need to manually operate the retraction and stop drilling actions. Therefore, workers need to constantly monitor the operation of the anchor bolting machine, resulting in relatively low automation, relatively high labor intensity, and relatively low work efficiency. Summary of the Invention

[0005] This invention provides a control system for drilling and retracting of an anchor bolting machine and a complete set of drilling and anchoring equipment to solve the technical problems of low automation level of anchor bolting machine control system, high labor intensity of workers, and low operating efficiency of anchor bolting machine.

[0006] According to one aspect of the present invention, a drilling and retraction control system for an anchor bolting machine is provided, comprising a manual hydraulic proportional multi-way valve, an automatic drilling and retraction control valve assembly, a drilling motor, a stroke valve, and a working cylinder. The manual hydraulic proportional multi-way valve includes a control oil circuit connected to the automatic drilling and retraction control valve assembly for supplying control oil to the automatic drilling and retraction control valve assembly; a first hydraulic valve assembly connected to both the automatic drilling and retraction control valve assembly and the drilling motor for supplying working oil to the drilling motor to drive the drilling motor to rotate forward and supplying control oil to the automatic drilling and retraction control valve assembly; and a working cylinder connected to both the automatic drilling and retraction control valve assembly and the working cylinder for supplying working oil to the working cylinder to drive the drilling motor. The second hydraulic control valve group, which supplies control oil to the automatic drilling and retraction control valve group, has stroke valves connected to both the drilling motor and the automatic drilling and retraction control valve group. When drilling is completed, these valves connect the drilling motor and the automatic drilling and retraction control valve group to terminate automatic drilling and activate automatic retraction. The automatic drilling and retraction control valve group supplies control oil to the hydraulic control ports of the first and second hydraulic control valve groups to maintain automatic drilling, or to the hydraulic control ports of the first and second hydraulic control valve groups to activate and maintain automatic retraction, or to the oil tank to activate and maintain a stopped drilling state.

[0007] As a further improvement to the above technical solution:

[0008] Furthermore, the automatic drilling and retraction control valve assembly includes a hydraulically controlled directional valve one connected to the control oil circuit; a one-way hydraulically controlled valve one connected to the hydraulic control port of the hydraulically controlled directional valve one and the control oil circuit respectively; a one-way hydraulically controlled valve two connected to the hydraulic control port of the hydraulically controlled directional valve one and the oil tank respectively; a sequence valve connected to the hydraulic control port of the one-way hydraulically controlled valve two and the rod-side oil circuit of the working cylinder respectively; a hydraulically controlled directional valve two connected to the hydraulically controlled directional valve one and whose hydraulic control port is connected to the rodless-side oil circuit of the working cylinder; and a valve connected to the hydraulically controlled directional valve one and... The hydraulic control directional valve three, connected to the working and retracting hydraulic control ports of the second hydraulic control valve group; the hydraulic control directional valve four, connected to the hydraulic control directional valve two and connected to the working inlet hydraulic control port of the second hydraulic control valve group; the hydraulic control directional valve five, connected to the first hydraulic control valve group and connected to the hydraulic control port of the hydraulic control directional valve four; the check valve one, connected to the stroke valve and connected to the hydraulic control ports of the hydraulic control directional valve three and the hydraulic control ports of the hydraulic control directional valve five respectively; and the shuttle valve, connected to the hydraulic control port of the first hydraulic control valve group and connected to the hydraulic control directional valve four and the check valve one respectively.

[0009] Furthermore, the control system also includes a manual directional valve disposed between the one-way hydraulic control valve and the control oil circuit and connected to the hydraulic control port of the one-way hydraulic control valve. The manual directional valve includes an upper working position for connecting the one-way hydraulic control valve and the control oil circuit, a middle working position for connecting the control oil circuit and the oil tank, a lower working position for connecting the hydraulic control port of the one-way hydraulic control valve and the control oil circuit and connecting the one-way hydraulic control valve and the control oil circuit, and a return elastic element for applying an elastic force to return the upper working position or the lower working position to the middle working position.

[0010] Furthermore, the automatic drilling and retraction control valve group also includes a pressure reducing valve located between the working inlet hydraulic control port and the hydraulic control directional valve four of the second hydraulic control valve group.

[0011] Furthermore, the automatic drilling and retraction control valve assembly also includes a check valve II for unloading oil, arranged side-by-side with the pressure reducing valve.

[0012] Furthermore, the control system also includes a one-way hydraulic control valve three, which is connected to the hydraulic control port and the hydraulic control directional valve four, for automatically conveying deslag removal water during drilling.

[0013] Furthermore, the control system also includes a ball valve arranged in parallel with the one-way hydraulic valve for manually controlling the flow rate of the slag removal water.

[0014] Furthermore, the control system also includes balance valves that are connected to the rod-side oil passage and the rodless-side oil passage of the working cylinder, respectively.

[0015] Furthermore, the working cylinder is provided with multiple cylinders, and the rod chambers of two adjacent working cylinders are connected, as are the rodless chambers of two adjacent working cylinders.

[0016] According to another aspect of the present invention, a complete set of anchor drilling equipment is also provided, which includes the above-described anchor drilling and retraction control system.

[0017] The present invention has the following beneficial effects:

[0018] The anchor bolting machine drilling and retraction control system of the present invention, during anchor bolting machine operation, respectively operates the first hydraulic control valve group and the second hydraulic control valve group in the manual hydraulic proportional multi-way valve. The first hydraulic control valve group supplies working oil to the drilling motor to drive it to rotate forward and supplies control oil to the automatic drilling and retraction control valve group. Simultaneously, the second hydraulic control valve group supplies working oil to the rodless chamber of the working cylinder to drive it to advance. Through the oil passage of the rodless chamber of the working cylinder, it supplies control oil to the automatic drilling and retraction control valve group, which in turn supplies control oil to the automatic drilling and retraction control valve group. The automatic drilling and retraction control valve group then supplies control oil to the first hydraulic control valve group. The drilling motor rotates forward synchronously with the working cylinder's feed valve at the hydraulic control port of the first hydraulic control valve group and the working hydraulic control port of the second hydraulic control valve group. This maintains the automatic drilling state and achieves the automatic drilling function. When automatic drilling reaches its limit position, the stroke valve is triggered. The stroke valve connects the drilling motor and the automatic retraction control valve group, causing the drilling motor to supply control oil to the automatic retraction control valve group. The automatic retraction control valve group then supplies control oil to the hydraulic control ports of the first and second hydraulic control valve groups respectively. At this time, the working position of the first hydraulic control valve group remains unchanged, while the working position of the second hydraulic control valve group switches to supply oil to the rod chamber of the working cylinder. The working oil drives the working cylinder to retract and supplies control oil to the automatic drill retraction control valve group through the rod chamber of the working cylinder. The forward rotation of the drilling motor is synchronized with the retraction of the working cylinder to activate and maintain the automatic drill retraction state, realizing the function of automatic drill retraction after automatic drilling is completed. When the automatic drill retraction reaches the limit position, the second hydraulic control valve group supplies control oil with a pressure greater than the set pressure to the automatic drill retraction control valve group through the rodless chamber oil circuit of the working cylinder. The automatic drill retraction control valve group then supplies the control oil to the oil tank, and the first and second hydraulic control valve groups reset to the initial working position. The drilling motor and the working cylinder stop operating to activate the automatic drill retraction control valve group. It maintains the drilling in a stopped state and achieves the function of automatically stopping drilling after automatic retraction. This solution uses a manual hydraulic proportional multi-way valve, an automatic drilling and retraction control valve group, a drilling motor, a stroke valve, and a working cylinder. After manually operating the manual hydraulic proportional multi-way valve to start the anchor bolting machine, it can control the anchor bolting machine to automatically drill, automatically retract the drill after automatic drilling, and automatically stop drilling after automatic retraction. That is, after the anchor bolting machine is started, no manual attention is required to achieve automatic drilling and retraction operations. Compared with existing technologies, it has a high degree of automation, low labor intensity for workers, high operating efficiency of the anchor bolting machine, strong practicality, and is suitable for widespread promotion and application.

[0019] In addition to the objectives, features, and advantages described above, the present invention has other objectives, features, and advantages. The invention will now be described in further detail with reference to the figures. Attached Figure Description

[0020] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0021] Figure 1 This is a control principle diagram of the anchor bolting machine drilling and retraction control system according to a preferred embodiment of the present invention;

[0022] Figure 2 This is a control principle diagram of the automatic drilling and retraction control valve group in the anchor bolting machine drilling and retraction control system of a preferred embodiment of the present invention.

[0023] Legend:

[0024] 10. Manual hydraulic proportional multi-way valve; 11. Control oil circuit; 12. First hydraulic valve group; 13. Second hydraulic valve group; 20. Automatic drilling and retraction control valve group; 201. Hydraulic directional valve one; 202. Hydraulic directional valve two; 203. Hydraulic directional valve three; 204. Hydraulic directional valve four; 205. Hydraulic directional valve five; 21. One-way hydraulic valve one; 22. One-way hydraulic valve two; 23. Sequence valve; 24. One-way valve one; 25. Shuttle valve; 26. Pressure reducing valve; 27. One-way valve two; 30. Drilling motor; 40. Stroke valve; 50. Working cylinder; 60. Manual directional valve; 70. One-way hydraulic valve three; 80. Ball valve; 90. Balance valve. Detailed Implementation

[0025] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered below.

[0026] like Figure 1 As shown, the anchor bolting machine drilling and retraction control system of this embodiment includes a manual hydraulic proportional multi-way valve, an automatic drilling and retraction control valve group, a drilling motor, a stroke valve, and a working cylinder. The manual hydraulic proportional multi-way valve includes a control oil circuit connected to the automatic drilling and retraction control valve group for supplying control oil to the automatic drilling and retraction control valve group; a first hydraulic valve group connected to both the automatic drilling and retraction control valve group and the drilling motor for supplying working oil to the drilling motor to drive the drilling motor to rotate forward and supplying control oil to the automatic drilling and retraction control valve group; and a working cylinder connected to both the automatic drilling and retraction control valve group and the working cylinder for supplying working oil to the working cylinder to drive the working cylinder to rotate forward. The second hydraulic control valve group supplies control oil to the automatic drilling and retraction control valve group. The stroke valves are connected to the drilling motor and the automatic drilling and retraction control valve group respectively. When drilling is completed, the drilling motor and the automatic drilling and retraction control valve group are connected to stop the automatic drilling and activate the automatic retraction. The automatic drilling and retraction control valve group is used to supply control oil to the hydraulic control port of the first hydraulic control valve group and the working hydraulic control port of the second hydraulic control valve group to maintain the automatic drilling state, or to supply control oil to the hydraulic control port of the first hydraulic control valve group and the working retraction hydraulic control port of the second hydraulic control valve group to activate and maintain the automatic retraction state, or to supply control oil to the oil tank to activate and maintain the stop drilling state.

[0027] like Figure 1 As shown, specifically, in the anchor bolting machine drilling and retraction control system of the present invention, during anchor bolting machine operation, the first hydraulic control valve group 12 and the second hydraulic control valve group 13 in the manual hydraulic proportional multi-way valve 10 are respectively activated. This causes the first hydraulic control valve group 12 to supply working oil to the drilling motor 30 to drive the drilling motor 30 to rotate forward and supply control oil to the automatic drilling and retraction control valve group 20. Simultaneously, the second hydraulic control valve group 13 supplies working oil to the rodless chamber of the working cylinder 50 to drive the working cylinder 50 to advance. Through the oil passage of the rodless chamber of the working cylinder 50, control oil is supplied to the automatic drilling and retraction control valve group 20. Furthermore, the control oil passage 11 supplies control oil to the automatic drilling and retraction control valve group 20, which then supplies the control oil... The oil is supplied to the hydraulic control port of the first hydraulic control valve group 12 and the working hydraulic control port of the second hydraulic control valve group 13, respectively. At this time, the drilling motor 30 rotates forward and moves synchronously with the working cylinder 50 to maintain the automatic drilling state and realize the automatic drilling function. When the automatic drilling reaches the limit position, the stroke valve 40 is triggered. The stroke valve 40 connects the drilling motor 30 and the automatic drilling and retraction control valve group 20, so that the drilling motor 30 supplies control oil to the automatic drilling and retraction control valve group 20. The automatic drilling and retraction control valve group 20 then supplies control oil to the hydraulic control port of the first hydraulic control valve group 12 and the working and retraction hydraulic control ports of the second hydraulic control valve group 13, respectively. At this time, the working position of the first hydraulic control valve group 12 remains unchanged, and the second hydraulic control valve group 13 switches to operation. The first hydraulic control valve group 12 and the second hydraulic control valve group 13 supply working oil to the rod chamber of the working cylinder 50 to drive the working cylinder 50 to retract. The working cylinder 50 then supplies control oil to the automatic retraction control valve group 20 through the rod chamber. The drilling motor 30 rotates forward synchronously with the working cylinder 50 to activate and maintain the automatic retraction state, achieving the function of automatic retraction after drilling is completed. When the automatic retraction reaches the limit position, the second hydraulic control valve group 13 supplies control oil exceeding the set pressure to the automatic retraction control valve group 20 through the rodless chamber oil passage of the working cylinder 50. The automatic retraction control valve group 20 then supplies the control oil to the oil tank. The first hydraulic control valve group 12 and the second hydraulic control valve group 13 reset to their initial working positions, and the drilling motor 30... The working cylinder 50 stops moving to activate and maintain the stopped drilling state, realizing the function of automatically stopping drilling after automatic retraction. This solution uses a manual hydraulic proportional multi-way valve 10, an automatic drilling and retraction control valve group 20, a drilling motor 30, a stroke valve 40, and a working cylinder 50. After manually operating the manual hydraulic proportional multi-way valve 10 to start the anchor bolting machine, it can control the anchor bolting machine to automatically drill, automatically retract the drill after automatic drilling, and automatically stop drilling after automatic retraction. That is, after the anchor bolting machine is started, no manual attention is required to realize automatic drilling and retraction operations. Compared with the existing technology, it has a high degree of automation, low labor intensity of workers, high operating efficiency of anchor bolting machine, strong practicality, and is suitable for widespread promotion and application.

[0028] It should be understood that when no control oil is supplied with hydraulic pressure at the hydraulic control port of the first hydraulic control valve group 12, the first hydraulic control valve group 12 returns to its initial position under the action of elastic preload, that is, the first hydraulic control valve group 12 is a directional valve with spring reset function.

[0029] It should be understood that when there is no control oil supplying hydraulic pressure to the working inlet or working outlet of the second hydraulic control valve group 13, the second hydraulic control valve group 13 returns to its initial position under the action of the return spring preload. That is, the second hydraulic control valve group 13 is a directional valve with spring reset function.

[0030] like Figure 1 and Figure 2 As shown, in this embodiment, the automatic drilling and retraction control valve group 20 includes a hydraulic control directional valve 201 connected to the control oil circuit 11, a one-way hydraulic control valve 21 connected to the hydraulic control port of the hydraulic control directional valve 201 and the control oil circuit 11, a one-way hydraulic control valve 22 connected to the hydraulic control port of the hydraulic control directional valve 201 and the oil tank, a sequence valve 23 connected to the hydraulic control port of the one-way hydraulic control valve 22 and the rod chamber oil circuit of the working cylinder 50, a hydraulic control directional valve 202 connected to the hydraulic control directional valve 201 and whose hydraulic control port is connected to the rodless chamber oil circuit of the working cylinder 50, and a hydraulic control directional valve 202 connected to the hydraulic control directional valve 201 and connected to the rodless chamber oil circuit of the working cylinder 50. The second hydraulic control valve group 13 is connected to the working and retracting hydraulic control ports of the hydraulic control valve three 203, the hydraulic control directional valve four 204 is connected to the hydraulic control directional valve two 202 and is connected to the working inlet hydraulic control port of the second hydraulic control valve group 13, the hydraulic control directional valve five 205 is connected to the first hydraulic control valve group 12 and is connected to the hydraulic control port of the hydraulic control directional valve four 204, the stroke valve 40 is connected to the hydraulic control port of the hydraulic control directional valve three 203 and the hydraulic control port of the hydraulic control directional valve five 205 respectively, and the shuttle valve 25 is connected to the hydraulic control port of the first hydraulic control valve group 12 and is connected to the hydraulic control directional valve four 204 and the check valve one 24 respectively.

[0031] like Figure 1 and Figure 2As shown, specifically, the automatic drilling control valve group 20 achieves automatic drilling as follows: When the first hydraulic control valve group 12 is moved to the upper position, when port A of the first hydraulic control valve group 12 supplies working oil to the drilling motor 30, a branch of control oil flows through port A1 of the automatic drilling control valve group 20, hydraulic control directional valve five 205, and acts on the hydraulic control port of hydraulic control directional valve four 204, so that hydraulic control directional valve four 204 switches to the left position and is in a conducting state; when the second hydraulic control valve group 13 is moved to the upper position... In operation, the A port of the second hydraulic control valve group 13 supplies working oil to the rodless chamber of the working cylinder 50, and a branch of control oil is split off and acts on the hydraulic control port of the hydraulic control directional valve 202 via the A2 port of the automatic drilling retraction control valve group 20, so that the hydraulic control directional valve 202 switches to the right position and is in the conducting state; the Z port of the control oil circuit 11 outputs two control oils, one of which acts on the hydraulic control port of the hydraulic control directional valve 201 via the ZC port of the automatic drilling retraction control valve group 20 and the one-way hydraulic control valve 21. This switches the hydraulic directional valve 201 to the left position, making it conductive. At this time, hydraulic directional valves 201, 202, and 204 are all conductive. The other control oil output from the Z port of control oil circuit 11 flows through the Z port of the automatic drilling retraction control valve group 20, hydraulic directional valves 201, 202, and 204, shuttle valve 25, and the CA1 port of the automatic drilling retraction control valve group 20, flowing towards the first hydraulic valve group 12. The hydraulic control port is used to keep the first hydraulic control valve group 12 in the current working position, and the water flows through the Z port of the automatic drilling and retraction control valve group 20, the hydraulic control reversing valve one 201, the hydraulic control reversing valve two 202, the hydraulic control reversing valve four 204 and the CA2 port of the automatic drilling and retraction control valve group 20 to the working hydraulic control port of the second hydraulic control valve group 13, so that the second hydraulic control valve group 13 is kept in the current working position, the drilling motor 30 rotates forward and the working cylinder 50 moves synchronously to maintain the automatic drilling state and realize the automatic drilling function.

[0032] like Figure 1 and Figure 2As shown, the working principle of the automatic drilling retraction control valve group 20 for automatic drilling retraction is as follows: After the automatic drilling reaches the limit position and triggers the stroke valve 40, the pressure oil of the drilling motor 30 flows through the stroke valve 40 and the S port of the automatic drilling retraction control valve group 20 to the one-way valve 24. The one-way valve 24 then divides the oil into four paths. One path of pressure oil acts on the hydraulic control port of the hydraulic control directional valve 5 205, causing the hydraulic control directional valve 5 205 to switch to the upper position and be closed. This results in the release of the oil from the hydraulic control port of the hydraulic control directional valve 4 204, causing the hydraulic control directional valve 4 204 to switch to the right position and be closed, thus releasing the logic pressure oil that maintains automatic drilling. Another path of pressure oil acts on the working and retraction hydraulic control port of the second hydraulic control valve group 13 through the CB2 port of the automatic drilling retraction control valve group 20. The second hydraulic control valve group 13 switches to the lower position to change the... When the hydraulic oil delivery direction is changed, so that the A port of the second hydraulic control valve group 13 delivers working oil to the rod chamber of the working cylinder 50; one pressure oil flows through the shuttle valve 25 and the CA1 port of the automatic drilling and retraction control valve group 20 to the hydraulic control port of the first hydraulic control valve group 12, so that the first hydraulic control valve group 12 is maintained in the current working position; another pressure oil acts on the hydraulic control port of the hydraulic control directional valve 203, and the hydraulic control directional valve 203 switches to the left position and is in the conducting state; at this time, the hydraulic control directional valve 201 and the hydraulic control directional valve 203 are in the conducting state, and the control oil output from the Z port of the control oil circuit 11 is supplemented into the logic pressure oil that maintains the automatic drilling and retraction through the Z port of the automatic drilling and retraction control valve group 20, the hydraulic control directional valve 201, and the hydraulic control directional valve 203, so as to activate and maintain the automatic drilling and retraction state, and realize the function of automatic drilling and retraction after automatic drilling is completed.

[0033] like Figure 1 and Figure 2 As shown, the working principle of the automatic drilling retraction control valve group 20 to achieve automatic drilling stop is as follows: When the automatic drilling retraction reaches the limit position, when the A port of the second hydraulic control valve group 13 delivers working oil to the rod chamber of the working cylinder 50, a control oil is separated and sequentially opens the sequence valve 23 and the one-way hydraulic control valve 22 through the B2 port of the automatic drilling retraction control valve group 20. At this time, the control oil of the hydraulic control port of the hydraulic control reversing valve 201 flows back to the oil tank through the one-way hydraulic control valve 22 and the L port of the automatic drilling retraction control valve group 20. The hydraulic control reversing valve 201 switches to the right position and is in the closed state. The control oil flowing in through the Z port of the automatic drilling retraction control valve group 20 cannot replenish the logic pressure oil that maintains the automatic drilling retraction. The first hydraulic control valve group 12 and the second hydraulic control valve group 13 are reset to the initial working position. The drilling motor 30 and the working cylinder 50 stop working to activate and maintain the automatic drilling stop state, realizing the function of automatic drilling stop after automatic drilling retraction is completed.

[0034] It should be understood that when the control oil acts on the hydraulic port of the hydraulic directional valve, the hydraulic valve will switch its operating position when the supplied hydraulic pressure is greater than the preload of the return spring.

[0035] like Figure 1 As shown, in this embodiment, the control system further includes a manual directional valve 60 disposed between the one-way hydraulic control valve 21 and the control oil circuit 11 and connected to the hydraulic control port of the one-way hydraulic control valve 21. The manual directional valve 60 includes an upper working position for connecting the one-way hydraulic control valve 21 and the control oil circuit 11, a middle working position for connecting the control oil circuit 11 and the oil tank, a lower working position for connecting the hydraulic control port of the one-way hydraulic control valve 21 and the control oil circuit 11 and connecting the one-way hydraulic control valve 21 and the control oil circuit 11, and a return elastic member for applying an elastic force to return the upper working position or the lower working position to the middle working position.

[0036] Specifically, by operating the manual reversing valve 60, the automatic drilling retraction or automatic drilling stop can be activated. In the actual operation of the anchor bolting machine, the automatic drilling retraction needs to be activated by operating the manual reversing valve 60 to improve operational safety. In addition, the automatic drilling stop can be activated by operating the manual reversing valve to realize the emergency stop function and ensure personal safety.

[0037] like Figure 1 and Figure 2 As shown, the working principle of the automatic retraction drilling activated by the manual directional valve 60 is as follows: When the manual directional valve 60 is moved to the upper working position, one path of control oil supplied by the Z port of the control oil circuit 11 acts on the hydraulic control port of the hydraulic directional valve 201 through the manual directional valve 60, the ZC port of the automatic retraction drilling control valve group 20, and the one-way hydraulic control valve 21, so that the hydraulic directional valve 201 switches to the left position and is in the conducting state; the other path of control oil supplied by the Z port of the control oil circuit 11 is supplied to the hydraulic directional valve 201 through the Z port of the automatic retraction drilling control valve group 20, and then splits into two paths, one of which goes through the hydraulic directional valve 202. 2. The automatic drilling and retraction function is activated by the hydraulic control directional valve 204. Another path acts on the hydraulic control port of the hydraulic control directional valve 201 to keep the hydraulic control directional valve 201 in the left position. After no longer applying force to the manual directional valve 60, the return elastic element causes the manual directional valve 60 to return from the upper working position to the middle working position. Another path of control oil delivered by the Z port of the control oil circuit 11 passes through the Z port of the automatic drilling and retraction control valve group 20 and acts on the hydraulic control port of the hydraulic control directional valve 201 to keep the hydraulic control directional valve 201 in the left position, so that the automatic drilling and retraction function remains activated.

[0038] like Figure 1 and Figure 2As shown, the working principle of the automatic drilling stop activated by the manual directional valve 60 is as follows: when the manual directional valve 60 is moved to the lower working position, part of the control oil output from the Z port of the control oil circuit 11 acts on the one-way hydraulic control valve 21 through the manual directional valve 60 and the JT port of the automatic drilling retraction control valve group 20, so as to open the one-way hydraulic control valve 21. The control oil of the hydraulic control port of the hydraulic directional valve 201 flows back to the oil tank through the one-way hydraulic control valve 21, the ZC port of the automatic drilling retraction control valve group 20 and the manual directional valve 60. The hydraulic directional valve 201 switches to the right position and is in the closed state, so that the automatic drilling retraction is kept in the inactive state, thereby realizing the emergency stop function.

[0039] like Figure 2 As shown, in this embodiment, the automatic drilling retraction control valve group 20 further includes a pressure reducing valve 26 disposed between the working feed hydraulic control port of the second hydraulic control valve group 13 and the hydraulic control directional valve four 204. Specifically, the control oil output from the hydraulic control directional valve four 204 flows to the working feed hydraulic control port of the second hydraulic control valve group 13 via the pressure reducing valve 26, so as to control the oil pressure at the working feed hydraulic control port of the second hydraulic control valve group 13 through the pressure reducing valve 26, thereby adjusting the working feed speed.

[0040] like Figure 2 As shown, in this embodiment, the automatic drilling and retraction control valve group 20 also includes a second check valve 27 for unloading oil, arranged side by side with the pressure reducing valve 26. Specifically, when the working cylinder 50 does not need automatic feeding, the control oil at the feed hydraulic control port of the second hydraulic control valve group 13 can be unloaded through the second check valve 27 to achieve the switching of the working position of the second hydraulic control valve group 13.

[0041] like Figure 1 As shown, in this embodiment, the control system also includes a one-way hydraulic control valve 70, whose hydraulic control port is connected to the hydraulic control directional valve 204, for automatically supplying deslag removal water during drilling. Specifically, during automatic drilling, the hydraulic control directional valve 204 is in the conducting state to supply control oil to the hydraulic control port of the one-way hydraulic control valve 70, thereby opening the one-way hydraulic control valve 70 so that deslag removal water can be automatically supplied through the one-way hydraulic control valve 70, ensuring smooth drilling operations.

[0042] like Figure 1 As shown, in this embodiment, the control system also includes a ball valve 80 arranged in parallel with the one-way hydraulic control valve 70 for manually controlling the flow rate of the deslagging water. Specifically, when the one-way hydraulic control valve 70 is blocked or the flow rate is too low, the opening of the ball valve 80 can be adjusted to manually control the flow and volume of the deslagging water, thereby further ensuring the smooth operation of drilling.

[0043] like Figure 1As shown, in this embodiment, the control system also includes a balance valve 90 connected to the rod-side oil passage and the rodless-side oil passage of the working cylinder 50, respectively. Specifically, when the manual hydraulic proportional multi-way valve 10 stops supplying oil, the balance valve 90 keeps the working cylinder 50 in its original working state.

[0044] like Figure 1 As shown, in this embodiment, multiple working cylinders 50 are provided, with the rod-side chambers of two adjacent working cylinders 50 connected and the rodless chambers of two adjacent working cylinders 50 connected. Specifically, by the joint action of multiple working cylinders 50, the load borne by a single working cylinder 50 is reduced while ensuring working power, thereby preventing the working cylinder 50 from being damaged due to excessive load and extending its service life.

[0045] The anchor bolting equipment of this embodiment includes the aforementioned anchor bolting machine drilling and retraction control system. Specifically, by adopting the aforementioned anchor bolting machine drilling and retraction control system in the anchor bolting equipment, the system can automatically control the anchor bolting machine to drill after startup, automatically retract the drill after drilling is completed, and automatically stop drilling after retraction. This greatly improves the degree of automation, reduces the labor intensity of workers, increases work efficiency, and is highly practical, making it suitable for widespread promotion and application.

[0046] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

[0047] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0048] This document uses specific examples to illustrate the principles and implementation methods of this application. The examples are merely for the purpose of helping to understand the method and core ideas of this application. The above descriptions are only preferred embodiments of this application. It should be noted that due to the limitations of written expression, and the existence of an infinite number of specific structures, those skilled in the art can make various improvements, modifications, or variations without departing from the principles of this application, and can also combine the above technical features in an appropriate manner. These improvements, modifications, variations, or combinations, or the direct application of the concept and technical solution of this application to other situations without modification, should all be considered as protected by this application.

Claims

1. A control system for drilling and retracting of an anchor bolting machine, characterized in that, The system includes a manual hydraulic proportional multi-way valve (10), an automatic drilling and retraction control valve assembly (20), a drilling motor (30), a stroke valve (40), and a working cylinder (50). The manual hydraulic proportional multi-way valve (10) includes a control oil circuit (11) connected to the automatic drilling and retraction control valve assembly (20) for supplying control oil to the automatic drilling and retraction control valve assembly (20); a first hydraulic valve assembly (12) connected to both the automatic drilling and retraction control valve assembly (20) and the drilling motor (30) for supplying working oil to the drilling motor (30) to drive the drilling motor (30) to rotate forward and supplying control oil to the automatic drilling and retraction control valve assembly (20); and a working cylinder (50) connected to both the automatic drilling and retraction control valve assembly (20) and the working cylinder (50) for supplying working oil to the working cylinder (50) to drive the working cylinder (50). 50) The second hydraulic control valve group (13) supplies control oil to the automatic drilling and retraction control valve group (20) and the stroke valve (40) is connected to the drilling motor (30) and the automatic drilling and retraction control valve group (20) respectively. It is used to connect the drilling motor (30) and the automatic drilling and retraction control valve group (20) when drilling is completed, so as to end the automatic drilling and activate the automatic retraction. The automatic drilling and retraction control valve group (20) is used to supply control oil to the hydraulic control port of the first hydraulic control valve group (12) and the working hydraulic control port of the second hydraulic control valve group (13) respectively to maintain the automatic drilling state, or to supply control oil to the hydraulic control port of the first hydraulic control valve group (12) and the working retraction hydraulic control port of the second hydraulic control valve group (13) respectively to activate and maintain the automatic retraction state, or to supply control oil to the oil tank to activate and maintain the stop drilling state.

2. The anchor bolting machine drilling and retraction control system according to claim 1, characterized in that, The automatic drilling retraction control valve assembly (20) includes a hydraulic control directional valve one (201) connected to the control oil circuit (11), a one-way hydraulic control valve one (21) connected to the hydraulic control port of the hydraulic control directional valve one (201) and the control oil circuit (11), a one-way hydraulic control valve two (22) connected to the hydraulic control port of the hydraulic control directional valve one (201) and the oil tank, a sequence valve (23) connected to the hydraulic control port of the one-way hydraulic control valve two (22) and the rod chamber oil circuit of the working cylinder (50), a hydraulic control directional valve two (202) connected to the hydraulic control directional valve one (201) and whose hydraulic control port is connected to the rodless chamber oil circuit of the working cylinder (50), and a hydraulic control directional valve two (202) connected to the hydraulic control directional valve one (201) and connected to the second hydraulic control valve. The hydraulic control valve group (13) consists of a hydraulic control valve three (203) connected to the hydraulic control port of the working and retracting hydraulic control valve group (13), a hydraulic control valve four (204) connected to the hydraulic control valve two (202) and connected to the working and inlet hydraulic control port of the second hydraulic control valve group (13), a hydraulic control valve five (205) connected to the first hydraulic control valve group (12) and connected to the hydraulic control port of the hydraulic control valve four (204), a check valve one (24) connected to the stroke valve (40) and connected to the hydraulic control port of the hydraulic control valve three (203) and the hydraulic control port of the hydraulic control valve five (205) respectively, and a shuttle valve (25) connected to the hydraulic control port of the first hydraulic control valve group (12) and connected to the hydraulic control valve four (204) and the check valve one (24) respectively.

3. The anchor bolting machine drilling and retraction control system according to claim 2, characterized in that, The control system also includes a manual directional valve (60) disposed between the one-way hydraulic control valve (21) and the control oil circuit (11) and connected to the hydraulic control port of the one-way hydraulic control valve (21). The manual directional valve (60) includes an upper working position for connecting the one-way hydraulic control valve (21) and the control oil circuit (11), a middle working position for connecting the control oil circuit (11) and the oil tank, a lower working position for connecting the hydraulic control port of the one-way hydraulic control valve (21) and the control oil circuit (11) and connecting the one-way hydraulic control valve (21) and the control oil circuit (11), and a return elastic member for applying an elastic force to return the upper working position or the lower working position to the middle working position.

4. The anchor bolting machine drilling and retraction control system according to claim 2, characterized in that, The automatic drilling and retraction control valve group (20) also includes a pressure reducing valve (26) located between the working hydraulic control port of the second hydraulic control valve group (13) and the hydraulic control directional valve four (204).

5. The anchor bolting machine drilling and retraction control system according to claim 4, characterized in that, The automatic drilling control valve assembly (20) also includes a check valve (27) for unloading oil, which is arranged side by side with the pressure reducing valve (26).

6. The anchor bolting machine drilling and retraction control system according to any one of claims 1-5, characterized in that, The control system also includes a one-way hydraulic control valve three (70) connected to the hydraulic control port and the hydraulic control directional valve four (204) for automatically conveying deslag removal water during drilling.

7. The anchor bolting machine drilling and retraction control system according to claim 6, characterized in that, The control system also includes a ball valve (80) arranged in parallel with the one-way hydraulic control valve (70) for manually controlling the flow rate of the slag removal water.

8. The anchor bolting machine drilling and retraction control system according to any one of claims 1-5, characterized in that, The control system also includes a balance valve (90) that is connected to the rod-side oil passage and the rodless-side oil passage of the working cylinder (50), respectively.

9. The anchor bolting machine drilling and retraction control system according to any one of claims 1-5, characterized in that, Multiple working cylinders (50) are provided, and the rod chambers of two adjacent working cylinders (50) are connected, and the rodless chambers of two adjacent working cylinders (50) are connected.

10. A complete set of tunneling and anchoring equipment, characterized in that, Includes the anchor bolting machine drilling and retraction control system as described in any one of claims 1-9.

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