A multi-mechanism interlocking electro-hydraulic control valve group and control system

Abstract

The present invention provides a multi-mechanism interlocking electro-hydraulic control valve group and control system, which belongs to the technical field of electro-hydraulic control systems. The multi-mechanism interlocking electro-hydraulic control valve group includes a flameproof electromagnetic reversing valve, a flameproof electromagnetic ball valve, a shuttle valve I, a shuttle valve II, a pressure sensor I, a pressure sensor II, a pressure sensor III, a pressure sensor IV, a hydraulically controlled ball valve I, a hydraulically controlled ball valve II, a joint seat, a plug, and a valve block. The flameproof electromagnetic reversing valve adopts a three-position four-way valve with a Y-type mid-position function. The flameproof electromagnetic ball valve, the shuttle valve I, the shuttle valve II, the hydraulically controlled ball valve I, and the hydraulically controlled ball valve II are all normally closed, which has higher reliability in the case of power failure and will not cause malfunction. On the basis of not affecting the functions and space requirements of each mechanism, the present invention not only effectively solves the interlocking problem between mechanisms of multiple different operating modes, but also eliminates the occurrence of safety accidents caused by the operator's negligence and forgetting to operate the interlocking device, thereby improving the safety production level of coal mines.

Description

Technical Field

[0001] The invention belongs to the technical field of electro-hydraulic control systems, and specifically discloses a multi-mechanism interlocking electro-hydraulic control valve group and a control system. Background Art

[0002] In order to improve production efficiency, most coal mines use multifunctional all-in-one machines, such as all-in-one mining and anchoring machines, which integrate this machine, temporary support, anchor drill and other mechanisms. The power sources of each mechanism are interconnected. If interlocking measures are not adopted, the mechanisms will operate simultaneously and collide during operation, which will seriously affect the safety of the operation. Due to the limitations of functions, space and other requirements, the operation methods of each mechanism are different: electro-hydraulic dual control, electric control, manual control, etc. This leads to complex interlocking methods and potential safety hazards. The interlocking methods currently used mainly include hydraulic control switching valves, ball valves, mechanical locking devices, etc. In actual operations, safety accidents caused by operators forgetting to operate one of the interlocking devices due to negligence often occur. Coal mine safety production is a top priority, and this problem needs to be solved urgently. Summary of the invention

[0003] The present invention provides a multi-mechanism interlocking electro-hydraulic control valve group and control system, which not only effectively solves the interlocking problem between mechanisms with multiple different operating modes without affecting the functions and space requirements of each mechanism, but also prevents the occurrence of safety accidents caused by operators' negligence and forgetting to operate the interlocking device, thereby improving the safety production level of coal mines.

[0004] The present invention provides a multi-mechanism interlocking electro-hydraulic control valve group, including an electromagnetic reversing valve, an electromagnetic ball valve, a shuttle valve I, a shuttle valve II, a hydraulically controlled ball valve I, and a hydraulically controlled ball valve II; the oil inlet of the electromagnetic reversing valve is used to connect the pilot liquid, the working port A is divided into two ways, the first way is used to connect the pilot liquid oil inlet of the mechanism IV, and the second way is connected to the oil inlet A of the shuttle valve I, the working port B is divided into two ways, the first way is connected to the oil inlet B of the shuttle valve I, and the second way is connected to the pilot port of the hydraulically controlled ball valve I; the electromagnetic ball valve The oil inlet is used to connect the pilot fluid, and the oil outlet is divided into two routes, the first route is used to connect the pilot fluid inlet of mechanism III, and the second route is connected to the oil inlet A of shuttle valve II; the oil inlet B of shuttle valve II is connected to the oil outlet of shuttle valve I, and the oil outlet is connected to the pilot port of hydraulically controlled ball valve II; the oil inlet of hydraulically controlled ball valve I is used to connect to the power source, and the oil outlet is used to connect to the main valve oil inlet of mechanism I; the oil inlet of hydraulically controlled ball valve II is used to connect to the power source, and the oil outlet is used to connect to the main valve oil inlet of mechanism II.

[0005] Furthermore, the above-mentioned multi-mechanism interlocked electro-hydraulic control valve group also includes a pressure sensor I for detecting the oil pressure at the oil outlet of the hydraulic control ball valve I, a pressure sensor II for detecting the first oil pressure of the electromagnetic reversing valve working port A, a pressure sensor III for detecting the first oil pressure of the electromagnetic ball valve, and a pressure sensor IV for detecting the oil pressure at the oil outlet of the hydraulic control ball valve II.

[0006] Furthermore, the electromagnetic reversing valve is a flameproof electromagnetic reversing valve, which adopts a three-position four-way valve with a Y-type mid-position function; the electromagnetic ball valve is a flameproof electromagnetic ball valve, and the flameproof electromagnetic ball valve, shuttle valve I, shuttle valve II, hydraulically controlled ball valve I, and hydraulically controlled ball valve II are all normally closed.

[0007] Furthermore, the explosion-proof electromagnetic reversing valve, the explosion-proof electromagnetic ball valve, the shuttle valve I, the shuttle valve II, the pressure sensor I, the pressure sensor II, the pressure sensor III, the pressure sensor IV, the hydraulically controlled ball valve I, and the hydraulically controlled ball valve II are all installed on the valve block; the surface of the valve block is provided with connector seats, which are respectively the oil inlet connector P port of the power source, the oil inlet connector PX port of the pilot liquid, the connector P2 port of the oil inlet port of the main valve of mechanism I, the connector P1 port of the oil inlet port of the main valve of mechanism II, the connector PX2 port of the pilot liquid inlet port of mechanism III, and the connector PX1 port of the pilot liquid inlet port of mechanism IV; the first way of the working port A of the explosion-proof electromagnetic reversing valve is connected to the PX1 port, the first way of the oil outlet of the explosion-proof electromagnetic ball valve is connected to the PX2 port, the oil outlet of the hydraulically controlled ball valve I is connected to the P2 port, and the oil outlet of the hydraulically controlled ball valve II is connected to the P1 port.

[0008] Furthermore, the valve block is provided with a plug-in hole I, a plug-in hole II, an oil hole group I, an oil hole group II, a process hole, and a plug-in hole III; a hydraulically controlled ball valve I and a hydraulically controlled ball valve II are installed in a plug-in hole I, a shuttle valve I and a shuttle valve II are installed in a plug-in hole II, the oil hole group I is connected to the oil port of the explosion-proof electromagnetic reversing valve, the oil hole group II is connected to the oil port of the explosion-proof electromagnetic ball valve, the plug-in hole III is installed with a pressure sensor I, a pressure sensor II, a pressure sensor III and a pressure sensor IV, and the process hole connects the plug-in hole I, the plug-in hole II, the oil hole group I, the oil hole group II and the plug-in hole III; the joint seat is installed on the port of the process hole located on the surface of the valve block.

[0009] The present invention provides a multi-mechanism interlocking electro-hydraulic control system, comprising an operation box, a PLC control box mechanism I, a mechanism II, a mechanism III, a mechanism IV and the multi-mechanism interlocking electro-hydraulic control valve group; the mechanism I and the mechanism II are both manually controlled, and the opening and closing require the opening and closing of the main oil circuit; the mechanism III is electro-hydraulic dual-control, the mechanism IV is electrically controlled, and the opening and closing require the opening and closing of the pilot fluid; the PLC control box is electrically connected to the operation box, the electromagnetic ball valve and the electromagnetic reversing valve respectively.

[0010] Furthermore, the PLC control box is provided with three working modes;

[0011] The first working mode: the solenoid Ⅰ of the electromagnetic ball valve is energized, the electromagnetic ball valve opens, and the pilot fluid is divided into two paths after passing through the electromagnetic ball valve. The first path directly enters mechanism Ⅲ, and the second path passes through the shuttle valve Ⅱ and then opens the hydraulic control ball valve Ⅱ to allow the high-pressure oil to enter mechanism Ⅱ through the hydraulic control ball valve Ⅱ. At this time, mechanism Ⅱ and mechanism Ⅲ can act at the same time, while mechanism Ⅰ and mechanism Ⅳ cannot act without oil source;

[0012] The second working mode: the solenoid II of the electromagnetic reversing valve is energized and reversed, the oil inlet is connected to the working port B, and the pilot fluid is divided into two paths after passing through the electromagnetic reversing valve. The first path passes through the shuttle valve I and then through the shuttle valve II to open the hydraulic control ball valve II to allow the high-pressure oil to enter the mechanism II through the hydraulic control ball valve II. The second path directly opens the hydraulic control ball valve I to allow the high-pressure oil to enter the mechanism I through the hydraulic control ball valve I. At this time, the mechanism I and the mechanism II can act at the same time, and the mechanism III and the mechanism IV cannot act without the oil source;

[0013] The third working mode: the electromagnet III of the electromagnetic reversing valve is energized and reversed, the oil inlet is connected to the working port A, and the pilot fluid is divided into two paths after passing through the electromagnetic reversing valve. The first path directly enters the mechanism IV, and the second path passes through the shuttle valve I and then through the shuttle valve II to open the hydraulic control ball valve II to allow the high-pressure oil to enter the mechanism II through the hydraulic control ball valve II. At this time, the mechanism II and the mechanism IV can act at the same time, and the mechanism I and the mechanism III cannot act without oil source.

[0014] The present invention provides a multi-mechanism interlocking electro-hydraulic control system, comprising an operation box, a PLC control box mechanism I, a mechanism II, a mechanism III, a mechanism IV and the multi-mechanism interlocking electro-hydraulic control valve group; the mechanism I and the mechanism II are both manually controlled, and the opening and closing require the opening and closing of the main oil circuit; the mechanism III is electro-hydraulic dual-control, and the mechanism IV is electrically controlled, and the opening and closing require the opening and closing of the pilot fluid; the PLC control box is electrically connected to the operation box, the electromagnetic ball valve, the electromagnetic reversing valve, the pressure sensor I, the pressure sensor II, the pressure sensor III, and the pressure sensor IV respectively.

[0015] Furthermore, the PLC control box is provided with three working modes;

[0016] The first working mode: the solenoid Ⅰ of the electromagnetic ball valve is energized, the electromagnetic ball valve is opened, and the pilot fluid is divided into two paths after passing through the electromagnetic ball valve. The first path directly enters mechanism Ⅲ, and the second path passes through the shuttle valve Ⅱ and opens the hydraulic control ball valve Ⅱ to allow the high-pressure oil to enter mechanism Ⅱ through the hydraulic control ball valve Ⅱ. At this time, mechanism Ⅱ and mechanism Ⅲ can act at the same time, and mechanism Ⅰ and mechanism Ⅳ cannot act without oil source; at the same time, pressure sensor Ⅲ and pressure sensor Ⅳ must have electrical signals fed back to the PLC control box together. If it is other electrical signal combinations, an alarm fault will be issued;

[0017] The second working mode: the solenoid II of the electromagnetic reversing valve is electrically reversed, the oil inlet is connected to the working port B, and the pilot fluid is divided into two paths after passing through the electromagnetic reversing valve. The first path passes through the shuttle valve I and then through the shuttle valve II to open the hydraulic control ball valve II to allow the high-pressure oil to enter the mechanism II through the hydraulic control ball valve II. The second path directly opens the hydraulic control ball valve I to allow the high-pressure oil to enter the mechanism I through the hydraulic control ball valve I. At this time, the mechanism I and the mechanism II can act at the same time, and the mechanism III and the mechanism IV cannot act without the oil source; at the same time, the pressure sensor I and the pressure sensor IV must have electrical signals fed back to the PLC control box together. If it is other electrical signal combinations, an alarm fault will be issued;

[0018] The third working mode: the electromagnet III of the electromagnetic reversing valve is energized and reversed, the oil inlet is connected to the working port A, and the pilot fluid is divided into two paths after passing through the electromagnetic reversing valve. The first path directly enters the mechanism IV, and the second path passes through the shuttle valve I and then through the shuttle valve II to open the hydraulic control ball valve II to allow the high-pressure oil to enter the mechanism II through the hydraulic control ball valve II. At this time, the mechanism II and the mechanism IV can act at the same time, and the mechanism I and the mechanism III cannot act without the oil source; at the same time, the pressure sensor II and the pressure sensor IV must have electrical signals fed back to the PLC control box together. If it is other electrical signal combinations, an alarm fault will be issued.

[0019] The present invention has the following beneficial effects:

[0020] 1. The multi-mechanism interlocking electro-hydraulic control valve group logically connects the solenoid valve, hydraulic control valve and shuttle valve through the valve block, and integrates various operation modes into a unified electrical signal control, which is not only safe but also easy to operate;

[0021] 2. The valve block is the basis of the multi-mechanism interlocking electro-hydraulic control valve group, which organically combines various valves and sensors to form a complete logical control. Various channels can be changed according to the function and mechanism function;

[0022] 3. The multi-mechanism interlocking electro-hydraulic control system contains a multi-mechanism interlocking electro-hydraulic control valve group, an operation box and a PLC control box, forming a closed-loop system with feedback self-detection, which has high reliability. The mode switching method requires shutdown and restart, which is highly safe;

[0023] In summary, the system integrates various operating modes of the mechanism into a unified electrical signal control through a logic control valve group, and adds feedback closed-loop control and a reasonable mode switching method, which improves the interlocking reliability and safety. On the basis of not affecting the functions and space requirements of each mechanism, it not only effectively solves the interlocking problem between mechanisms with multiple different operating modes, but also eliminates the occurrence of safety accidents caused by the operator's negligence and forgetting to operate the interlocking device, thereby improving the safety production level of coal mines. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 It is the structural diagram of the multi-mechanism interlocking electro-hydraulic control valve group;

[0026] Figure 2 It is the principle diagram of the multi-mechanism interlocking electro-hydraulic control valve group;

[0027] Figure 3 This is the main view of the multi-mechanism interlocking electro-hydraulic control valve group;

[0028] Figure 4 It is a top view of the multi-mechanism interlocking electro-hydraulic control valve group;

[0029] Figure 5 It is a bottom view of the multi-mechanism interlocking electro-hydraulic control valve group;

[0030] Figure 6 This is the left view of the multi-mechanism interlocking electro-hydraulic control valve group;

[0031] Figure 7 It is the right view of the multi-mechanism interlocking electro-hydraulic control valve group;

[0032] Figure 8 The internal structure diagram of the valve block;

[0033] Fig. 9 It is the schematic diagram of the multi-mechanism interlocking electro-hydraulic control system;

[0034] Icons: 1 flameproof solenoid reversing valve; 2 flameproof solenoid ball valve; 3 shuttle valve Ⅰ; 4 shuttle valve Ⅱ; 5 pressure sensor Ⅰ; 6 pressure sensor Ⅱ; 7 pressure sensor Ⅲ; 8 pressure sensor Ⅳ; 9 hydraulically controlled ball valve Ⅰ; 10 hydraulically controlled ball valve Ⅱ; 11 connector seat; 12 plug; 13 valve block; 14.1 electromagnet I; 14.2 electromagnet II; 14.3 electromagnet III; 15 insertion hole Ⅰ; 16 insertion hole Ⅱ; 17 oil hole group Ⅰ; 18 oil hole group Ⅱ; 19 process hole; 20 insertion hole Ⅲ; 21 operation box; 22 PLC control box; 23 multi-mechanism interlocking electro-hydraulic control valve group; 24 mechanism Ⅰ; 25 mechanism Ⅱ; 26 mechanism Ⅲ; 27 mechanism Ⅳ. DETAILED DESCRIPTION

[0035] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] Example 1

[0037] This embodiment provides a multi-mechanism interlocking electro-hydraulic control valve group 23, including an electromagnetic reversing valve, an electromagnetic ball valve, a shuttle valve I3, a shuttle valve II4, a pressure sensor I5, a pressure sensor II6, a pressure sensor III7, a pressure sensor IV8, a hydraulically controlled ball valve I9, a hydraulically controlled ball valve II10, a connector seat 11, a plug 12, and a valve block 13. The electromagnetic reversing valve is a flameproof electromagnetic reversing valve 1, which adopts a three-position four-way valve with a Y-type mid-position function. The electromagnetic ball valve is a flameproof electromagnetic ball valve 2, and the flameproof electromagnetic ball valve 2, the shuttle valve I3, the shuttle valve II4, the hydraulically controlled ball valve I9, and the hydraulically controlled ball valve II10 are all normally closed, which has higher reliability in the case of power failure and will not cause malfunction.

[0038] The oil inlet of the explosion-proof electromagnetic reversing valve 1 is used to connect the pilot liquid, and the working port A is divided into two ways. The first way is used to connect the pilot liquid oil inlet of mechanism IV27, and the second way is connected to the oil inlet A of shuttle valve I3. The working port B is divided into two ways. The first way is connected to the oil inlet B of shuttle valve I3, and the second way is connected to the pilot port of hydraulic control ball valve I9; the oil inlet of the explosion-proof electromagnetic ball valve 2 is used to connect the pilot liquid, and the oil outlet is divided into two ways. The first way is used to connect the pilot liquid oil inlet of mechanism III26, and the second way is connected to the oil inlet A of shuttle valve II4; the oil inlet B of shuttle valve II4 is connected to the oil outlet of shuttle valve I3, and the oil outlet is connected to the pilot port of hydraulic control ball valve II10; the oil inlet of hydraulic control ball valve I9 ​​is ​​used to connect the power source, and the oil outlet is used to connect the main valve oil inlet of mechanism I24; the oil inlet of hydraulic control ball valve II10 is used to connect the power source, and the oil outlet is used to connect the main valve oil inlet of mechanism II25.

[0039] Pressure sensor Ⅰ5 is used to detect the oil pressure at the oil outlet of hydraulic control ball valve Ⅰ9, pressure sensor Ⅱ6 is used to detect the first oil pressure of working port A of explosion-proof electromagnetic reversing valve 1, pressure sensor Ⅲ7 is used to detect the first oil pressure of explosion-proof electromagnetic ball valve 2, and pressure sensor Ⅳ8 is used to detect the oil pressure at the oil outlet of hydraulic control ball valve Ⅱ10.

[0040] The valve block 13 is the main frame of the multi-mechanism interlocking electro-hydraulic control valve group 23. The valve block 13 is provided with a plug hole Ⅰ15, a plug hole Ⅱ16, an oil hole group Ⅰ17, an oil hole group Ⅱ18, a process hole 19, and a plug hole Ⅲ20; the plug hole Ⅰ15 is installed with a hydraulic control ball valve Ⅰ9 and a hydraulic control ball valve Ⅱ10, the plug hole Ⅱ16 is installed with a shuttle valve Ⅰ3 and a shuttle valve Ⅱ4, the oil hole group Ⅰ17 is connected to the oil port of the explosion-proof electromagnetic reversing valve 1, the oil hole group Ⅱ18 is connected to the oil port of the explosion-proof electromagnetic ball valve 2, the plug hole Ⅲ20 is installed with a pressure sensor Ⅰ5, a pressure sensor Ⅱ6, a pressure sensor Ⅲ7 and a pressure sensor Ⅳ8, and the process hole 19 is installed according to the schematic diagram ( Figure 2 )Connect the insertion hole Ⅰ15, the insertion hole Ⅱ16, the oil hole group Ⅰ17, the oil hole group Ⅱ18, and the insertion hole Ⅲ20 to realize the interlocking function of the valve group.

[0041] The connector seat 11 is installed on the port of the process hole 19 located on the surface of the valve block 13, which are respectively the oil inlet connector P port of the power source, the oil inlet connector PX port of the pilot fluid, the connector P2 port of the main valve oil inlet port of mechanism I 24, the connector P1 port of the main valve oil inlet port of mechanism II 25, the connector PX2 port of the pilot fluid oil inlet port of mechanism III 26 and the connector PX1 port of the pilot fluid oil inlet port of mechanism IV 27.

[0042] The first line of the working port A of the explosion-proof electromagnetic reversing valve 1 is connected to the PX1 port, the first line of the oil outlet of the explosion-proof electromagnetic ball valve 2 is connected to the PX2 port, the oil outlet of the hydraulic control ball valve Ⅰ9 is connected to the P2 port, and the oil outlet of the hydraulic control ball valve Ⅱ10 is connected to the P1 port.

[0043] Specifically, the flameproof electromagnetic reversing valve 1 is installed on the upper left part of the upper surface of the valve block 13 with screws, the flameproof electromagnetic ball valve 2 is installed on the upper right part of the upper surface of the valve block 13 with screws, the shuttle valve I3 and the shuttle valve II4 are installed on the middle part of the upper surface of the valve block 13, the pressure sensor I5 is installed on the left surface of the valve block 13, the pressure sensor II6 and the pressure sensor III7 are installed on the lower part of the upper surface of the valve block 13, the pressure sensor IV8 is installed on the right surface of the valve block 13, and the hydraulically controlled ball valve I9 ​​and the hydraulically controlled ball valve II10 are installed on the middle and lower part of the upper surface of the valve block 13. A plurality of joint seats 11 are installed on the front and right surfaces of the valve block 13, and a plurality of plugs 12 are installed on the upper, front, rear, left and right surfaces of the valve block 13, respectively.

[0044] Example 2

[0045] This embodiment provides a multi-mechanism interlocking electro-hydraulic control system, including an operation box 21, a PLC control box 22, a mechanism I 24, a mechanism II 25, a mechanism III 26, a mechanism IV 27, and a multi-mechanism interlocking electro-hydraulic control valve group 23 described in Example 1; the PLC control box 22 is electrically connected to the operation box 21, the flameproof electromagnetic reversing valve 1, the flameproof electromagnetic ball valve 2, the pressure sensor I 5, the pressure sensor II 6, the pressure sensor III 7, and the pressure sensor IV 8. The different operation modes of each mechanism are unified into an electrical control mode through the multi-mechanism interlocking electro-hydraulic control valve group 23, and the signal output is completed by the operation box 21 and the PLC control box 22 to form an interlocking control system.

[0046] The P port of the multi-mechanism interlocking electro-hydraulic control valve group 23 is connected to the power source, the PX port is connected to the pilot fluid, the P2 port is connected to the oil inlet of the main valve of mechanism Ⅰ24, the P1 port is connected to the oil inlet of the main valve of mechanism Ⅱ25, the PX2 port is connected to the pilot fluid oil inlet of mechanism Ⅲ26, and the PX1 port is connected to the pilot fluid oil inlet of mechanism Ⅳ27. Mechanism Ⅰ24, mechanism Ⅲ26, and mechanism Ⅳ27 are mutually self-locking, and mechanism Ⅱ25 can act simultaneously with any one of mechanisms Ⅰ24, mechanism Ⅲ26, and mechanism Ⅳ27. Mechanism Ⅰ24 and mechanism Ⅱ25 are both manually controlled, and the main oil circuit (from the P port) must be turned on and off for opening and closing; mechanism Ⅲ26 is electro-hydraulic dual control, and mechanism Ⅳ27 is electronically controlled, and opening and closing only requires turning on and off the pilot fluid (from the PX port) is sufficient.

[0047] The functions of each component in the whole system are described as follows.

[0048] The flameproof electromagnetic reversing valve 1 mainly plays the role of switching two pilot fluids.

[0049] The flameproof electromagnetic ball valve 2 mainly plays the role of opening and closing the third pilot fluid.

[0050] The shuttle valve is of plug-in type. The shuttle valve Ⅰ3 is connected to the flameproof electromagnetic reversing valve 1, and then connected to the flameproof electromagnetic ball valve 2 through the shuttle valve Ⅱ4; it mainly plays the role of pilot liquid pressure logic control.

[0051] The pressure sensor is a threaded plug-in oil pressure sensor, which detects the pressure of oil ports PX1, PX2, P1, and P2 respectively, and feeds back the pressure signal to the PLC control box 22 for logical comparison; it mainly plays the role of valve group fault self-detection.

[0052] The hydraulically controlled ball valve is of cartridge type. The hydraulically controlled ball valve Ⅰ9 is connected to high-pressure oil, and the pilot port is connected to one pilot fluid. The hydraulically controlled ball valve Ⅱ10 is connected to high-pressure oil, and the pilot port is connected to three pilot fluids through a shuttle valve group. It mainly controls the opening and closing of the high-pressure main oil circuit.

[0053] The connector seat 11 mainly serves to connect the mechanism, the hydraulic valve group and the power source.

[0054] The plug 12 is a straight pipe thread plug, which mainly serves to seal the process hole.

[0055] The operation box 21 can control the electrical system of the whole machine. It has three working modes, corresponding to different mechanisms respectively. It mainly plays the role of operating the interlocking mode of the switching mechanism.

[0056] The PLC control box 22 is the core processing component. The program is designed according to the working mode of the whole machine, and can control the action of the valve group and analyze and process the feedback pressure signal.

[0057] The working process of the whole system is described as follows.

[0058] When working, first select the working mode on the operation box 21 and then start the whole machine switch to ensure that the operable signal of each mechanism is unique. If the mode is switched during work, the whole machine will automatically stop.

[0059] The PLC control box 22 is provided with three working modes.

[0060] The first working mode: the electromagnet Ⅰ14.1 of the electromagnetic ball valve is energized, the electromagnetic ball valve opens, and the pilot fluid is divided into two paths after passing through the electromagnetic ball valve. The first path directly enters the mechanism Ⅲ26, and the second path passes through the shuttle valve Ⅱ4 and opens the hydraulic control ball valve Ⅱ10 to allow the high-pressure oil to enter the mechanism Ⅱ25 through the hydraulic control ball valve Ⅱ10. At this time, the mechanism Ⅱ25 and the mechanism Ⅲ26 can act at the same time, and the mechanism Ⅰ24 and the mechanism Ⅳ27 cannot act without oil source; at the same time, the pressure sensor Ⅲ7 and the pressure sensor Ⅳ8 must have electrical signals fed back to the PLC control box 22 together. If it is other electrical signal combinations, an alarm fault will be issued and the valve group must be checked.

[0061] The second working mode: the electromagnet Ⅱ14.2 of the electromagnetic reversing valve is electrically reversed, the oil inlet is connected to the working port B, and the pilot fluid is divided into two paths after passing through the electromagnetic reversing valve. The first path passes through the shuttle valve Ⅰ3 and then through the shuttle valve Ⅱ4 to open the hydraulic control ball valve Ⅱ10 to allow the high-pressure oil to enter the mechanism Ⅱ25 through the hydraulic control ball valve Ⅱ10. The second path directly opens the hydraulic control ball valve Ⅰ9 to allow the high-pressure oil to enter the mechanism Ⅰ24 through the hydraulic control ball valve Ⅰ9. At this time, the mechanism Ⅰ24 and the mechanism Ⅱ25 can act at the same time, and the mechanism Ⅲ26 and the mechanism Ⅳ27 cannot act without oil source; at the same time, the pressure sensor Ⅰ5 and the pressure sensor Ⅳ8 must have electrical signals fed back to the PLC control box 22 together. If it is other electrical signal combinations, an alarm fault will be issued and the valve group must be checked.

[0062] The third working mode: the electromagnet Ⅲ14.3 of the electromagnetic reversing valve is electrically reversed, the oil inlet is connected to the working port A, and the pilot fluid is divided into two paths after passing through the electromagnetic reversing valve. The first path directly enters the mechanism Ⅳ27, and the second path passes through the shuttle valve Ⅰ3 and then through the shuttle valve Ⅱ4 to open the hydraulic control ball valve Ⅱ10 to allow the high-pressure oil to enter the mechanism Ⅱ25 through the hydraulic control ball valve Ⅱ10. At this time, the mechanism Ⅱ25 and the mechanism Ⅳ27 can be operated at the same time, and the mechanism Ⅰ24 and the mechanism Ⅲ26 cannot be operated without oil source; at the same time, the pressure sensor Ⅱ6 and the pressure sensor Ⅳ8 must have electrical signals fed back to the PLC control box 22 together. If it is other electrical signal combinations, an alarm fault will be issued and the valve group must be checked.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A multi-mechanism interlocking electro-hydraulic control valve group, characterized in that: It includes a solenoid reversing valve, a solenoid ball valve, a shuttle valve I (3), a shuttle valve II (4), a hydraulically controlled ball valve I (9), and a hydraulically controlled ball valve II (10); The oil inlet of the electromagnetic reversing valve is used to connect the pilot fluid. The working port A is divided into two paths, the first path is used to connect the pilot fluid oil inlet of mechanism IV (27), and the second path is connected to the oil inlet A of shuttle valve I (3). The working port B is divided into two paths, the first path is connected to the oil inlet B of shuttle valve I (3), and the second path is connected to the pilot port of the hydraulically controlled ball valve I (9). The oil inlet of the electromagnetic ball valve is used to connect the pilot fluid, and the oil outlet is divided into two paths, the first path is used to connect the pilot fluid oil inlet of mechanism III (26), and the second path is connected to the oil inlet A of the shuttle valve II (4); The oil inlet B of the shuttle valve II (4) is connected to the oil outlet of the shuttle valve I (3), and the oil outlet is connected to the pilot port of the hydraulically controlled ball valve II (10); The oil inlet of the hydraulically controlled ball valve I (9) is used to connect to a power source, and the oil outlet is used to connect to the oil inlet of the main valve of mechanism I (24); The oil inlet of the hydraulically controlled ball valve II (10) is used to connect to a power source, and the oil outlet is used to connect to the oil inlet of the main valve of mechanism II (25); The electromagnetic reversing valve is a flameproof electromagnetic reversing valve (1), which adopts a three-position four-way valve with a Y-type middle position function; The electromagnetic ball valve is a flameproof electromagnetic ball valve (2). The flameproof electromagnetic ball valve (2), shuttle valve I (3), shuttle valve II (4), hydraulically controlled ball valve I (9), and hydraulically controlled ball valve II (10) are all of the normally closed type. The flameproof electromagnetic reversing valve (1), the flameproof electromagnetic ball valve (2), the shuttle valve I (3), the shuttle valve II (4), the hydraulically controlled ball valve I (9), and the hydraulically controlled ball valve II (10) are all installed on the valve block (13); The surface of the valve block (13) is provided with a connector seat (11), which respectively connects to the oil inlet connector P of the power source, the oil inlet connector PX of the pilot fluid, the connector P2 of the main valve oil inlet of mechanism I (24), the connector P1 of the main valve oil inlet of mechanism II (25), the connector PX2 of the pilot fluid oil inlet of mechanism III (26), and the connector PX1 of the pilot fluid oil inlet of mechanism IV (27); The first line of the working port A of the flameproof electromagnetic reversing valve (1) is connected to the PX1 port, the first line of the oil outlet of the flameproof electromagnetic ball valve (2) is connected to the PX2 port, the oil outlet of the hydraulically controlled ball valve I (9) is connected to the P2 port, and the oil outlet of the hydraulically controlled ball valve II (10) is connected to the P1 port.

2. The multi-mechanism interlocking electro-hydraulic control valve group according to claim 1 is characterized in that: It also includes a pressure sensor I (5) for detecting the oil pressure at the oil outlet of the hydraulically controlled ball valve I (9), a pressure sensor II (6) for detecting the first oil pressure of the electromagnetic reversing valve working port A, a pressure sensor III (7) for detecting the first oil pressure of the electromagnetic ball valve, and a pressure sensor IV (8) for detecting the oil pressure at the oil outlet of the hydraulically controlled ball valve II (10).

3. The multi-mechanism interlocking electro-hydraulic control valve group according to claim 2 is characterized in that: Pressure sensor I (5), pressure sensor II (6), pressure sensor III (7), and pressure sensor IV (8) are all installed on the valve block (13).

4. The multi-mechanism interlocking electro-hydraulic control valve group according to claim 3 is characterized in that: The valve block (13) is provided with an insertion hole I (15), an insertion hole II (16), an oil hole group I (17), an oil hole group II (18), a process hole (19), and an insertion hole III (20); The plug hole I (15) is installed with the hydraulic control ball valve I (9) and the hydraulic control ball valve II (10), the plug hole II (16) is installed with the shuttle valve I (3) and the shuttle valve II (4), the oil hole group I (17) is connected to the oil port of the flameproof electromagnetic reversing valve (1), the oil hole group II (18) is connected to the oil port of the flameproof electromagnetic ball valve (2), the plug hole III (20) is installed with the pressure sensor I (5), the pressure sensor II (6), the pressure sensor III (7) and the pressure sensor IV (8), and the process hole (19) is connected with the plug hole I (15), the plug hole II (16), the oil hole group I (17), the oil hole group II (18) and the plug hole III (20); The connector seat (11) is mounted on the port of the process hole (19) located on the surface of the valve block (13).

5. A multi-mechanism interlocking electro-hydraulic control system, characterized in that: It comprises an operation box (21), a PLC control box (22), a mechanism I (24), a mechanism II (25), a mechanism III (26), a mechanism IV (27), and a multi-mechanism interlocking electro-hydraulic control valve group as described in any one of claims 1 to 4; Mechanism I (24) and Mechanism II (25) are both manually controlled, and the main oil circuit must be opened and closed for opening and closing; Mechanism III (26) is electro-hydraulic dual control, and mechanism IV (27) is electrically controlled, and the pilot fluid must be turned on and off for opening and closing; The PLC control box (22) is electrically connected to the operation box (21), the electromagnetic ball valve, and the electromagnetic reversing valve respectively.

6. The multi-mechanism interlocking electro-hydraulic control system according to claim 5, characterized in that: The PLC control box (22) is provided with three working modes; The first working mode: the solenoid Ⅰ (14.1) of the electromagnetic ball valve is energized, the electromagnetic ball valve opens, and the pilot fluid is divided into two paths after passing through the electromagnetic ball valve. The first path directly enters mechanism Ⅲ (26), and the second path passes through the shuttle valve Ⅱ (4) and opens the hydraulic control ball valve Ⅱ (10) to allow the high-pressure oil to enter mechanism Ⅱ (25) through the hydraulic control ball valve Ⅱ (10). At this time, mechanism Ⅱ (25) and mechanism Ⅲ (26) can act at the same time, while mechanism Ⅰ (24) and mechanism Ⅳ (27) cannot act without oil source; The second working mode: the solenoid II (14.2) of the electromagnetic reversing valve is energized and the oil inlet is connected to the working port B. The pilot fluid is divided into two paths after passing through the electromagnetic reversing valve. The first path passes through the shuttle valve I (3) and then through the shuttle valve II (4) to open the hydraulic control ball valve II (10) so that the high-pressure oil passes through the hydraulic control ball valve II (10) and enters the mechanism II (25). The second path directly opens the hydraulic control ball valve I (9) so that the high-pressure oil passes through the hydraulic control ball valve I (9) and enters the mechanism I (24). At this time, the mechanism I (24) and the mechanism II (25) can be operated at the same time, while the mechanism III (26) and the mechanism IV (27) cannot be operated without the oil source. The third working mode: the solenoid III (14.3) of the electromagnetic reversing valve is energized and the oil inlet is connected to the working port A. The pilot fluid is divided into two paths after passing through the electromagnetic reversing valve. The first path directly enters the mechanism IV (27), and the second path passes through the shuttle valve I (3) and then through the shuttle valve II (4) to open the hydraulic control ball valve II (10) to allow the high-pressure oil to enter the mechanism II (25) through the hydraulic control ball valve II (10). At this time, the mechanism II (25) and the mechanism IV (27) can be operated at the same time, while the mechanism I (24) and the mechanism III (26) cannot be operated without the oil source.

7. A multi-mechanism interlocking electro-hydraulic control system, characterized in that: It comprises an operation box (21), a PLC control box (22), a mechanism I (24), a mechanism II (25), a mechanism III (26), a mechanism IV (27), and a multi-mechanism interlocking electro-hydraulic control valve group as described in any one of claims 2 to 4; Mechanism I (24) and Mechanism II (25) are both manually controlled, and the main oil circuit must be opened and closed for opening and closing; Mechanism III (26) is electro-hydraulic dual control, and mechanism IV (27) is electrically controlled, and the pilot fluid must be turned on and off for opening and closing; The PLC control box (22) is electrically connected to the operation box (21), the electromagnetic ball valve, the electromagnetic reversing valve, the pressure sensor I (5), the pressure sensor II (6), the pressure sensor III (7), and the pressure sensor IV (8), respectively.

8. The multi-mechanism interlocking electro-hydraulic control system according to claim 7, characterized in that: The PLC control box (22) is provided with three working modes; The first working mode: the solenoid Ⅰ (14.1) of the electromagnetic ball valve is energized, the electromagnetic ball valve opens, and the pilot fluid is divided into two paths after passing through the electromagnetic ball valve. The first path directly enters mechanism Ⅲ (26), and the second path passes through the shuttle valve Ⅱ (4) and opens the hydraulic control ball valve Ⅱ (10) to allow the high-pressure oil to enter mechanism Ⅱ (25) through the hydraulic control ball valve Ⅱ (10). At this time, mechanism Ⅱ (25) and mechanism Ⅲ (26) can be operated at the same time, while mechanism Ⅰ (24) and mechanism Ⅳ (27) cannot be operated without oil source; at the same time, pressure sensor Ⅲ (7) and pressure sensor Ⅳ (8) must have electrical signals fed back to the PLC control box (22). If there is any other electrical signal combination, an alarm will be issued; The second working mode: the solenoid II (14.2) of the electromagnetic reversing valve is electrically switched, the oil inlet is connected to the working port B, and the pilot fluid is divided into two paths after passing through the electromagnetic reversing valve. The first path passes through the shuttle valve I (3) and then through the shuttle valve II (4) to open the hydraulic control ball valve II (10) so that the high-pressure oil passes through the hydraulic control ball valve II (10) and enters the mechanism II (25). The second path directly opens the hydraulic control ball valve I (9) so that the high-pressure oil passes through the hydraulic control ball valve I (9) and enters the mechanism I (24). At this time, the mechanism I (24) and the mechanism II (25) can be operated at the same time, and the mechanism III (26) and the mechanism IV (27) cannot be operated without the oil source; at the same time, the pressure sensor I (5) and the pressure sensor IV (8) must have electrical signals fed back to the PLC control box (22). If there is any other electrical signal combination, an alarm fault will be issued; The third working mode: the solenoid III (14.3) of the electromagnetic reversing valve is electrically switched, the oil inlet is connected to the working port A, and the pilot fluid is divided into two paths after passing through the electromagnetic reversing valve. The first path directly enters the mechanism IV (27), and the second path passes through the shuttle valve I (3) and then through the shuttle valve II (4) to open the hydraulic control ball valve II (10) to allow the high-pressure oil to enter the mechanism II (25) through the hydraulic control ball valve II (10). At this time, the mechanism II (25) and the mechanism IV (27) can be operated at the same time, and the mechanism I (24) and the mechanism III (26) cannot be operated without the oil source; at the same time, the pressure sensor II (6) and the pressure sensor IV (8) must have electrical signals fed back to the PLC control box (22). If there is any other electrical signal combination, an alarm fault will be issued.

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