A rail-road dual-purpose working vehicle sector limiting control system and method

Abstract

The application discloses a kind of public rail dual-purpose working vehicle sector limiting control system and method, the control system, including main pump, rotary control valve, control handle, rotary motor and control component, the oil outlet of main pump is communicated with the oil inlet of rotary control valve, the working oil port of rotary control valve is communicated with the oil port of rotary motor, rotary control valve has first state, second state and third state, at least one side of swing center line on working vehicle is equipped with two limit switches, two limit switches are respectively used to change rotary control valve from first state to second state and from third state to first state, limit switch can be triggered by upper car platform, rotary signal key for changing rotary control valve from second state to first state or third state is equipped on control handle, limit switch, control handle and rotary control valve are connected with control component.The control system makes that working vehicle has rotary limiting function.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of engineering machinery, and particularly relates to a sector limiting control system and method for a road-rail working vehicle. BACKGROUND

[0002] The road-rail working vehicle is a special mechanical equipment for railway track maintenance, has the characteristics of multifunction, and can be used for repairing and replacing sleepers, and can also realize tamping, screen cleaning, slagging, reclamation and cleaning, etc. through matching different tools. The current working vehicle mainly comprises a lower vehicle frame, an upper vehicle platform, a working device, a running frame, a hydraulic system, an electrical system, a cab and a working tool, wherein the upper vehicle platform is arranged on the lower vehicle frame through a rotary support, the working device is arranged on the upper vehicle platform, and the working vehicle can realize replacement of track sleepers through combined actions of swinging of the working device, rotation of the upper vehicle platform, clamping and deflection of the tool. However, the current working vehicle has no limiting structure for rotation, and when working on the railway, only the operator can operate the machine without crossing the line by visual observation, which has safety risks. Therefore, when repairing the single-side rail, it is necessary to apply for closing the whole line in advance, which reduces the operation efficiency of the railway line. SUMMARY

[0003] The main purpose of the present application is to provide a sector limiting control system and method for a road-rail working vehicle, which aims to realize the rotation limiting of the road-rail working vehicle.

[0004] Therefore, the sector limiting control system for the road-rail working vehicle provided by the present application comprises a main pump, a rotary control valve, a control handle, a rotary motor and a control component.

[0005] The rotary motor is used to drive the upper vehicle platform of the working vehicle to rotate, the oil outlet of the main pump is in communication with the oil inlet of the rotary control valve, and the first working oil port and the second working oil port of the rotary control valve are in one-to-one correspondence with the two oil ports of the rotary motor.

[0006] The rotary control valve has a first state, a second state and a third state; wherein when the rotary control valve is in the first state, the main pump drives the rotary motor to rotate in the forward direction, when the rotary control valve is in the second state, the rotary motor stops rotating, and when the rotary control valve is in the third state, the main pump drives the rotary motor to rotate in the reverse direction.

[0007] The two limit switches are arranged on at least one side of the swing center line of the working vehicle, and are used for switching the rotary control valve from the first state to the second state and from the third state to the first state, respectively, the limit switches can be triggered by the superstructure platform, the rotary signal key is arranged on the control handle and is used for switching the rotary control valve from the second state to the first state or the third state, and the limit switches, the control handle and the rotary control valve are connected with the control component.

[0008] Specifically, the control component comprises a rotary pilot control valve and a pilot logic control component, two oil outlets of the rotary pilot control valve are connected with two hydraulic control ends of the rotary control valve respectively, input ends of the pilot logic control component are connected with the control handle and the two limit switches respectively, and an output end of the pilot logic control component is connected with a control end of the rotary pilot control valve.

[0009] Specifically, the rotary pilot control valve comprises a first rotary electromagnetic switch valve and a second rotary electromagnetic switch valve, and the two hydraulic control ends of the rotary control valve are connected with a C3 port on the first rotary electromagnetic switch valve and a C4 port on the second rotary electromagnetic switch valve respectively.

[0010] Specifically, a first rotary pressure sensor is arranged on the first rotary electromagnetic switch valve, a second rotary pressure sensor is arranged on the second rotary electromagnetic switch valve, the first rotary pressure sensor is used for detecting a first rotary signal transmitted by the rotary signal key on the control handle and outputting a feedback signal K5, and the second rotary pressure sensor is used for detecting a second rotary signal transmitted by the rotary signal key and outputting a feedback signal K6.

[0011] The input ends of the pilot logic control component are connected with the detection signals K5 and K6, detection signals K7 and K8 of the two limit switches respectively, and the output end of the pilot logic control component is connected with a coil K3 of the first rotary electromagnetic switch valve and a coil K4 of the second rotary electromagnetic switch valve respectively.

[0012] Specifically, two limit switches are arranged on both sides of the swing center line of the working device of the working vehicle.

[0013] Specifically, the working vehicle is further provided with a manual switch for controlling signal on-off between the limit switches and the pilot logic control component.

[0014] Specifically, the limit switch is an inductive switch.

[0015] Another aspect of the embodiment of the application provides a sector limit control method of a highway-railway dual-purpose working vehicle using the above control system.

[0016] Compared with the prior art, the control system provided by the embodiment of the application has the beneficial effect that the limit switch arranged by the control system can limit the maximum turning angle of the single side of the boarding platform, and the operator does not need to deliberately judge the turning angle by vision, and the single side construction operation can be smoothly carried out under the condition that the railway line is not stopped for inspection, and meanwhile, the other side line is not invaded, thereby ensuring the safe and reliable operation of the railway network. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiments description. Obviously, the drawings in the following description are only some embodiments of the application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0018] Figure 1 is a schematic diagram of a work vehicle using the control system provided by the embodiment of the application;

[0019] Figure 2 is a control principle diagram of the control system provided by the embodiment of the application;

[0020] 1, main pump; 2, turning control valve; 3, turning motor; 4, turning pilot control valve; 5, pilot logic control; 6, detection feedback signal; 7, boarding platform; 8, work device. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the application will be described clearly and completely in the following with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only some of the embodiments of the application, but not all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the application.

[0022] In the description of the application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application.

[0023] Furthermore, the terms "first", "second", etc. are used only for descriptive purposes and do not connote or imply relative importance or a quantity of the indicated technical features. Thus, features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality" is two or more, unless otherwise expressly and specifically limited.

[0024] Referring to Figure 1 and Figure 2 A sector limiting control system of a dual-purpose truck includes a main pump 1, a swing control valve 2, a control handle, a swing motor 3 and a control component. The swing motor 3 is used to drive the superstructure 7 of the truck to rotate. The oil outlet of the main pump 1 is communicated with the oil inlet of the swing control valve 2. The first working oil port A1 and the second working oil port B2 of the swing control valve 2 are communicated with the two oil ports A and B of the swing motor 3 one by one. The swing control valve 2 has a first state, a second state and a third state. When the swing control valve 2 is in the first state, the main pump 1 drives the swing motor 3 to rotate forward. When the swing control valve 2 is in the second state, the swing motor 3 stops rotating. When the swing control valve 2 is in the third state, the main pump 1 drives the swing motor 3 to rotate reversely.

[0025] At least one side of the superstructure of the truck located in the swing center line of the working device 8 is provided with two limit switches. The two limit switches are respectively used to switch the swing control valve 2 from the first state to the second state and from the third state to the first state. The limit switches can be triggered by the superstructure 7. The control handle is provided with a swing signal key for switching the swing control valve 2 from the second state to the first state or the third state. The limit switches, the control handle and the swing control valve 2 are connected with the control component.

[0026] The working process of the control system is as follows: when the upper platform 7 of the working vehicle runs to the position of one of the limit switches, the limit switch is triggered and feeds back a signal to the control component, the control component controls the rotary control valve 2 to switch from the third state to the second state, the main pump 1 stops supplying oil to the rotary motor 3, and the rotary motor 3 stops moving; when the rotary signal key of the control handle is triggered, the rotary signal key generates a first rotary signal and transmits it to the control handle, the control handle outputs a feedback signal K5 to the control component, the control component controls the rotary control valve 2 to switch from the second state to the first state, the main pump 1 drives the rotary motor 3 to rotate in the forward direction, and the whole machine rotates in the clockwise direction; when the rotary motor 3 rotates to the maximum limit positive angle, that is, the other limit switch is triggered, the limit switch feeds back a signal to the control component, the control component controls the rotary control valve 2 to switch from the first state to the second state, the main pump 1 stops supplying oil to the rotary motor 3, and the rotary motor 3 stops moving; when the other rotary signal key of the control handle is triggered, the rotary signal key generates a second rotary signal and transmits it to the control handle, the control handle outputs a feedback signal K6 to the control component, the control component controls the rotary control valve 2 to switch from the second state to the third state, the main pump 1 drives the rotary motor 3 to rotate in the reverse direction, and the whole machine rotates in the counterclockwise direction until the limit switch is triggered again.

[0027] The control system provided by the embodiment can limit the maximum rotary angle of one side of the upper platform through the limit switch, and the operator does not need to deliberately judge the rotary angle by vision, so that the unilateral construction operation can be smoothly carried out under the condition that the railway line is not stopped for inspection, and the other side of the line is not invaded, thereby ensuring the safe and reliable operation of the railway network.

[0028] Referring to Figure 2 In some embodiments, two limit switches are arranged on both sides of the swing center line of the working device 8 on the working vehicle, the control component includes a rotary pilot control valve 4 and a pilot logic control 5, two oil outlets of the rotary pilot control valve 4 are respectively connected with two hydraulic control ends (corresponding to a first rotary control port K1 and a second rotary control port K2) of the rotary control valve 2, input ends of the pilot logic control 5 are connected with the control handle and the two limit switches, and an output end of the pilot logic control 5 is connected with a control end of the rotary pilot control valve 4, the rotary pilot control valve 4 includes a first rotary electromagnetic switch valve 4.1a and a first rotary electromagnetic switch valve 4.1b, and the two hydraulic control ends of the rotary control valve 2 are respectively connected with a C3 port on the first rotary electromagnetic switch valve 4.1a and a C4 port on the first rotary electromagnetic switch valve 4.1b.

[0029] A sector limit control method of a highway-railway dual-purpose working vehicle using the control system is provided, which includes the following steps:

[0030] The operator manipulates the control handle and sends control instructions to the pilot logic control 5, the pilot logic control 5 sends control signals to the slewing pilot control valve 4 according to the received control instructions, the slewing pilot control valve 4 controls the slewing control valve 2 and the main pump 1 to work according to the received control signals, so that the slewing motor 3 drives the superstructure to rotate clockwise; when the superstructure runs to the limit switch, the limit switch is triggered and sends instructions to the pilot logic control 5, the pilot logic control 5 controls the slewing control valve 2 to stop supplying oil to the slewing motor 3, the slewing motor 3 stops working, and the superstructure stops working; when the operator manipulates the control handle again and sends control instructions to the pilot logic control 5, the pilot logic control 5 sends control signals to the slewing pilot control valve 4 according to the received control instructions, the slewing pilot control valve 4 controls the slewing control valve 2 to work according to the received control signals, and reverses the oil supply of the slewing motor 3, so that the slewing motor 3 reverses, and then drives the superstructure to rotate counterclockwise; when the superstructure runs to another limit switch, the limit switch is triggered and sends instructions to the pilot logic control 5, the pilot logic control 5 controls the slewing control valve 2 to stop supplying oil to the slewing motor 3, the slewing motor 3 stops working, and the superstructure stops working.

[0031] Referring to Figure 2 In other embodiments, a first slewing pressure sensor 4.2a is arranged on the first slewing electromagnetic switching valve 4.1a, the first slewing pressure sensor 4.2a is used to detect the first slewing signal Signal-a transmitted by the slewing signal key on the control handle, and output a feedback signal K5, a second slewing pressure sensor 4.2b is arranged on the second slewing electromagnetic switching valve 4.1b, the second slewing pressure sensor 4.2b is used to detect the second slewing signal Signal-b transmitted by the slewing signal key, and output a feedback signal K6, the input end of the pilot logic control 5 is connected with the detection signals K5, K6, the detection signals K7 and K8 of the two limit switches respectively, the output end of the pilot logic control 5 is connected with the coil K3 of the first slewing electromagnetic switching valve 4.1a and the coil K4 of the first slewing electromagnetic switching valve 4.1b respectively, and the slewing control valve 2 comprises a slewing main valve core 2.1.

[0032] Referring to Figure 2 The working process of the control system with the above structure is as follows:

[0033] If the construction site requires the working device of the working vehicle to be limited to work in the right side interval of the track center line (see Figure 1), i.e. "right limit" mode, at this time when the first rotary pressure sensor 4.2a detects the first rotary signal Signal-a, the control signal is sent out through the pilot logic control 5, so that the first rotary electromagnetic switching valve 4.1a is in the right working position (i.e. the first main oil port A3 is communicated with the third main oil port C3, and the third main oil port C3 is disconnected with the second main oil port B3), so that the first rotary electromagnetic switching valve 4.1b is in the left working position (i.e. the second main oil port B4 is communicated with the third main oil port C4, and the third main oil port C4 is disconnected with the first main oil port A4), the first rotary control port K1 pushes the rotary main spool 2.1 of the rotary control valve 2 to move right to the left working position (i.e. the first main oil port A1 is communicated with the third main oil port C1, i.e. the second main oil port B1 is communicated with the fourth main oil port D1, the pressure oil P flows through the first main oil port A1, the third main oil port C1, the first working oil port A1, the oil port A, the rotary motor 3, and the pressure oil in the rotary motor 3 flows out from the oil port B, the second working oil port B2, the third main oil port C1, the first main oil port A1), at this time the pressure oil of the main pump 1 flows through the oil port of the rotary main spool 2.1 to the oil port A of the rotary motor 3, and drives the rotary motor 3 to rotate clockwise, when it rotates to the maximum limit positive angle (i.e. the clockwise is the positive angle), the pilot logic control 5 detects the feedback signal 6 at the same time, so that the first rotary electromagnetic switching valve 4.1a is in the left working position (i.e. the first main oil port A3 is disconnected with the third main oil port C3, and the third main oil port C3 is communicated with the second main oil port B3), so that the first rotary electromagnetic switching valve 4.1b is in the left working position (i.e. the second main oil port B4 is communicated with the third main oil port C4, and the third main oil port C4 is disconnected with the first main oil port A4), the first rotary control port K1 and the second rotary control port K2 are connected with the oil return T, the rotary main spool 2.1 is in the middle position (i.e. the first main oil port A1, the second main oil port B1 and the third main oil port C1 are communicated, and the fourth main oil port D1 is disconnected, the main pump 1 stops supplying oil to the rotary motor 3), the oil ports A and B of the rotary motor 3 have no oil, the rotary motor 3 stops rotating, and the whole machine stops rotating clockwise; when the first rotary pressure sensor 4.2a detects the second rotary signal Signal-b, the control signal is sent out through the pilot logic control 5, so that the first rotary electromagnetic switching valve 4.1a is in the left working position (i.e. the first main oil port A3 is disconnected with the third main oil port C3, and the third main oil port C3 is communicated with the second main oil port B3), so that the first rotary electromagnetic switching valve 4.1b is in the right working position (i.e. the second main oil port B4 is disconnected with the third main oil port C4, and the third main oil port C4 is communicated with the first main oil port A4), the first rotary control port K1 pushes the rotary main spool 2.1. left shift is in the right position (i.e. the first main oil port A1 is communicated with the third main oil port D1, the second main oil port B1 is communicated with the fourth main oil port C1, the pressure oil P enters the rotary motor 3 through the first main oil port A1, the third main oil port D1, the first working oil port B1 and the oil port B, and the pressure oil in the rotary motor 3 flows out from the oil port A, the second working oil port A2, the third main oil port C1 and the first main oil port B1), at this time, the pressure oil P of the main pump 1 flows to the oil port B of the rotary motor 3 through the oil port of the rotary main valve core 2.1, and drives the rotary motor 3 to rotate counterclockwise, when rotating to the maximum limit negative angle (i.e. negative angle counterclockwise), the pilot logic control member 5 simultaneously detects the feedback signal 6, so that the first rotary electromagnetic switching valve 4.1b is in the left working position (i.e. the first main oil port A4 is disconnected with the third main oil port C4, and the third main oil port C4 is communicated with the second main oil port B4), the first rotary electromagnetic switching valve 4.1a is in the right working position (i.e. the second main oil port B4 is disconnected with the third main oil port C4, and the third main oil port C4 is connected with the first main oil port A4), the first rotary control port K1 and the second rotary control port K2 are connected with the oil return T, the rotary main valve core 2.1 is in the middle position (i.e. the first main oil port A1, the second main oil port B1 and the third main oil port C1 are communicated, and the fourth main oil port D1 is disconnected), the oil ports A and B of the rotary motor 3 are not driven to enter oil, the rotary motor 3 stops rotating, and the whole machine stops rotating counterclockwise; that is, the machine realizes movement in the right limit working range.

[0034] If the construction site requires the working device of the working vehicle to be limited to work in the left side interval of the track center line (see Figure 1 ), that is, the "left limit" mode, and the same applies.

[0035] In other embodiments, a manual switch for controlling the signal on-off between the limit switch and the pilot logic control member 5 is further arranged on the working vehicle, when the manual switch is switched to the "off mode, the signals of the controller and the left and right sensing switches are all interrupted, and the superstructure platform can rotate freely. The limit switch adopts an inductive switch or a proximity switch, wherein the proximity switch can be selected from a passive proximity switch, an eddy current proximity switch, a Hall proximity switch or an optical proximity switch, and the trigger on the superstructure platform needs to be adapted accordingly.

[0036] Any technical solution disclosed in the present application, unless otherwise stated, if it discloses a numerical range, the disclosed numerical range is a preferred numerical range, any person skilled in the art should understand that the preferred numerical range is only one of the many implementable values with more obvious technical effects or representative values. Since there are too many values, it is impossible to enumerate them, therefore, the present application discloses part of the values to illustrate the technical solutions of the present application, and the above-mentioned enumerated values should not constitute a limitation on the protection scope of the present application.

[0037] Meanwhile, if the present application discloses or involves mutually fixedly connected parts or structural members, unless otherwise stated, the fixed connection can be understood as: detachably fixed connection (for example, using bolt or screw connection), and can also be understood as: non-detachable fixed connection (for example, riveting, welding), of course, the mutually fixed connection can also be replaced by an integral structure (for example, integrally formed by using casting process) (obviously, except for the cases where integral forming process cannot be used).

[0038] In addition, the terms used to represent the positional relationship or shape in any of the technical solutions disclosed in the present application include the approximate, similar or close state or shape, unless otherwise stated. Any component provided by the present application can be assembled from multiple individual components or manufactured as a single component by integral forming process.

[0039] The above embodiments are only examples for clearly illustrating the present application, and are not limitations on the embodiments. Based on the above description, other different forms of changes or variations can also be made by those skilled in the art. Here, it is neither necessary nor possible to exhaust all the embodiments. The obvious changes or variations derived therefrom are still within the protection scope of the present application.

Claims

1. A sector limit control system for a dual-purpose road-rail vehicle, characterized in that: It includes a main pump (1), a rotary control valve (2), a control handle, a rotary motor (3), and control components; The rotary motor (3) is used to drive the upper platform of the work vehicle to rotate. The oil outlet of the main pump (1) is connected to the oil inlet of the rotary control valve (2). The first working oil port and the second working oil port of the rotary control valve (2) are connected to the two oil ports of the rotary motor (3) in a one-to-one correspondence. The rotary control valve (2) has a first state, a second state, and a third state; wherein, when the rotary control valve (2) is in the first state, the main pump (1) drives the rotary motor (3) to rotate in the forward direction; when the rotary control valve (2) is in the second state, the rotary motor (3) stops rotating; and when the rotary control valve (2) is in the third state, the main pump (1) drives the rotary motor (3) to rotate in the reverse direction. The work vehicle is equipped with two limit switches on at least one side of the swing centerline. The two limit switches are used to switch the rotary control valve (2) from the first state to the second state and from the third state to the first state, respectively. The limit switches can be triggered by the upper platform. The control handle is equipped with a rotary signal key to switch the rotary control valve (2) from the second state to the first state or the third state. The limit switches, control handle and rotary control valve (2) are all connected to the control component. The control component includes a rotary pilot control valve (4) and a pilot logic control element (5). The two oil outlets of the rotary pilot control valve (4) are respectively connected to the two hydraulic control terminals of the rotary control valve (2). The input terminal of the pilot logic control element (5) is respectively connected to the control handle and the two limit switches. The output terminal of the pilot logic control element (5) is connected to the control terminal of the rotary pilot control valve (4). The rotary pilot control valve (4) includes a first rotary solenoid switching valve and a second rotary solenoid switching valve. The two hydraulic control terminals of the rotary control valve (2) are respectively connected to port C3 on the first rotary solenoid switching valve and port C4 on the second rotary solenoid switching valve. The first rotary solenoid switching valve is equipped with a first rotary pressure sensor, which is used to detect the first rotary signal transmitted by the rotary signal key on the control handle and output a feedback signal K5. The second rotary solenoid switching valve is equipped with a second rotary pressure sensor, which is used to detect the second rotary signal transmitted by the rotary signal key and output a feedback signal K6. The input terminals of the pilot logic control unit (5) are respectively connected to the detection signal K5, the signal detection K6, the detection signals K7 and K8 of the two limit switches, and the output terminals of the pilot logic control unit (5) are respectively connected to the coil K3 of the first rotary solenoid switching valve and the coil K4 of the second rotary solenoid switching valve.

2. The sector limit control system for the dual-purpose road-rail vehicle according to claim 1, characterized in that: The work vehicle is equipped with two limit switches on both sides of the swing centerline.

3. The sector limit control system for the dual-purpose road-rail vehicle according to claim 2, characterized in that: The work vehicle is also equipped with a manual switch to control the signal connection between the limit switch and the control component.

4. The sector limit control system for the dual-purpose road-rail vehicle according to claim 3, characterized in that: The limit switch is an inductive switch.

5. A sector limit control method for a dual-purpose road-rail vehicle, characterized in that: Control is performed using the control system described in any one of claims 1-4.

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