阅读说明：本技术 液压捣固装置 (Hydraulic tamping device ) 是由 刘伟 林磊 肖前龙 胡骞 刘洁丽 汪锐 于 2020-04-30 设计创作，主要内容包括：本发明提供了一种液压捣固装置,包括：安装板、液压激振缸、夹持油缸、捣镐、配油管路、换向阀和开关阀,液压激振缸通过第一固定铰接点安装于安装板上,夹持油缸的一端与液压激振缸同轴连接,捣镐与夹持油缸的另一端活动连接,配油管路与油源以及液压激振缸连通以向液压激振缸供油,以供液压激振缸往复振动带动夹持油缸一起振动,夹持油缸往复运动带动捣镐进行所述夹持动作,换向阀设在配油管路上,换向阀进行换向以供油源向液压激振缸供油,以使液压激振缸进行往复振动,开关阀通过配油管路与换向阀连通,开关阀进行开关动作以使换向阀进行换向,上述方案中,利用开关阀进行高速开关动作,操作简单方便,易于控制,可以适应不同的工况需求。(The invention provides a hydraulic tamping device, comprising: mounting panel, hydraulic pressure excitation cylinder, centre gripping hydro-cylinder, tamping pick, oil distribution pipeline, switching-over valve and ooff valve, hydraulic pressure excitation cylinder is installed on the mounting panel through first fixed pin joint, the one end and the hydraulic pressure excitation cylinder coaxial coupling of centre gripping hydro-cylinder, the tamping pick is swing joint with the other end of centre gripping hydro-cylinder, oil distribution pipeline and oil source and hydraulic pressure excitation cylinder intercommunication are in order to supply oil to hydraulic pressure excitation cylinder, in order to supply the reciprocal vibration of hydraulic pressure excitation cylinder to drive the centre gripping hydro-cylinder and vibrate together, centre gripping hydro-cylinder reciprocating motion drives the tamping pick and carries out the centre gripping action, the switching-over valve is established on oil distribution pipeline, the switching-over valve commutates and supplies oil to hydraulic pressure excitation cylinder with the oil supply, so that hydraulic pressure excitation cylinder carries out reciprocal vibration, the ooff valve communicates with the switching-over valve through oil distribution pipeline, the ooff valve carries out the switching-on-off action so that, easy to control and can adapt to different working condition requirements.)

1. A hydraulic tamping device, comprising:

the mounting plate is provided with a first fixed hinge point;

the hydraulic excitation cylinder is arranged on the mounting plate through the first fixed hinge point;

one end of the clamping oil cylinder is coaxially connected with the hydraulic excitation cylinder;

the tamping pick is movably connected with the other end of the clamping oil cylinder;

the oil distribution pipeline is communicated with an oil source and the hydraulic excitation cylinder to supply oil to the hydraulic excitation cylinder so that the hydraulic excitation cylinder vibrates in a reciprocating manner to drive the clamping oil cylinder to vibrate together, and the clamping oil cylinder reciprocates to drive the tamping pick to perform the clamping action;

the reversing valve is arranged on the oil distribution pipeline and used for reversing to supply the oil source to the hydraulic vibration excitation cylinder so as to enable the hydraulic vibration excitation cylinder to perform reciprocating vibration;

and the switching valve is communicated with the reversing valve through the oil distribution pipeline and performs switching action to enable the reversing valve to reverse.

2. The hydraulic tamping apparatus of claim 1, wherein the oil source includes:

the first oil source supplies oil to the hydraulic excitation cylinder through the oil distribution pipeline;

and the second oil source supplies oil to the reversing valve through the oil distribution pipeline.

3. The hydraulic tamping apparatus of claim 2, wherein the reversing valve includes:

a valve core of the reversing valve is arranged on the valve body,

a valve body is reversed,

a reversing valve end cover arranged at the left side and the right side of the reversing valve core,

the reversing valve body and the reversing valve end cover are arranged in an enclosing mode to form a working cavity, the reversing valve core is arranged in the working cavity, and the working cavity is divided into a first control cavity and a second control cavity by the reversing valve core.

4. The hydraulic tamping apparatus of claim 3, wherein the on-off valve includes:

a first switching valve and a second switching valve;

the first switching valve controls the second oil source to be communicated with the first control cavity, the second switching valve controls the second oil source to be communicated with the second control cavity, and the pressure acting area of the first control cavity is equal to that of the second control cavity.

5. The hydraulic tamping apparatus of claim 3, wherein the on-off valve includes:

a third on-off valve;

and the third switch valve controls the second oil source to be communicated with the first control cavity, wherein the second control cavity is in a normal pressure state, and the pressure action area of the first control cavity is smaller than that of the second control cavity.

6. The hydraulic tamping apparatus of claim 3, wherein the hydraulic excitation cylinder includes:

a first hydraulic vibration excitation cylinder and a second hydraulic vibration excitation cylinder;

the two ends of the hydraulic excitation cylinder piston rod are respectively installed in the first hydraulic excitation cylinder and the second hydraulic excitation cylinder, the hydraulic excitation cylinder piston rod is matched with the hydraulic excitation cylinder, and the hydraulic excitation cylinder piston rod is hinged with the first fixed hinged joint so as to install the hydraulic excitation cylinder on the installation plate;

the first hydraulic vibration excitation cylinder and the second hydraulic vibration excitation cylinder can rotate around the first fixed hinged point in a plane.

7. The hydraulic tamping device of claim 6, further comprising:

the PWM signal controller is used for controlling the switching valve to carry out switching action according to the output frequency of the PWM signal so that the second oil source is communicated with the first control cavity and the second control cavity alternately to enable the reversing valve core to reverse;

and the reversing valve core reverses to supply the first oil source to respectively and alternately distribute oil for the first hydraulic vibration exciting cylinder and the second hydraulic vibration exciting cylinder so as to enable the hydraulic vibration exciting cylinders to perform reciprocating vibration.

8. The hydraulic tamping device of any of claims 1 to 7, wherein the tamping pick comprises:

the upper arm and the lower arm of the tamping pick;

the second fixing hinged point is respectively movably connected with the upper arm of the tamping pick and the lower arm of the tamping pick, and the upper arm of the tamping pick and the lower arm of the tamping pick can rotate in the plane around the second fixing hinged point.

9. The hydraulic tamping device of any of claims 1 to 7, further comprising:

the one end of centre gripping hydro-cylinder piston install in the centre gripping hydro-cylinder, and with centre gripping hydro-cylinder looks adaptation, the other end of centre gripping hydro-cylinder piston with tamping pick upper arm swing joint, centre gripping hydro-cylinder piston can drive the tamping pick upper arm rotates in the plane.

10. The hydraulic tamping device of claim 4 or 5, further comprising an oil tank,

based on the condition that the switch valve comprises the first switch valve and the second switch valve, the oil tank comprises a first oil tank and a second oil tank, the first oil tank is communicated with the reversing valve, and the second oil tank is communicated with the first switch valve and the second switch valve respectively; or

Based on the condition that the switch valve comprises the third switch valve, the oil tank comprises a third oil tank which is respectively communicated with the third switch valve and the reversing valve.

Technical Field

The invention relates to the technical field of railway tamping devices, in particular to a hydraulic tamping device.

Background

The tamping device is a core component of the tamping vehicle. The tamping device is a device with excitation and clamping compound actions, the tamping pick transmits horizontal vibration force generated by an excitation cylinder to the ballast, so that the ballast generates vibration and moves towards a more stable direction, the compactness of a track bed is increased, and meanwhile, the tamping pick extrudes the ballast in a track sleeper interval towards the sleeper bottom under the action of clamping force, so that the ballast at the sleeper bottom is more compact, the stability of a track is improved, the driving safety is ensured, the tamping device aims at different track bed conditions, and the key of the working efficiency of the tamping pick is realized by outputting proper excitation frequency and amplitude through the excitation cylinder.

At present, the sources of horizontal vibration force are various, the motor drives the eccentric shaft to rotate in the most common mode, in addition, a hydraulic vibration excitation mode and the like are adopted, in the related technology, in the technical scheme of generating the horizontal vibration force in the hydraulic vibration excitation mode, the effective vibration of the hydraulic cylinder is controlled by utilizing a rotary valve or a servo valve, however, the rotary valve needs to be designed independently, the design difficulty is high, the servo valve is high in control difficulty, and the hardware cost is high.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art or the related art.

To this end, a first aspect of the invention provides a hydraulic tamping device.

In view of the above, according to a first aspect of the present invention, there is provided a hydraulic tamper comprising: the mounting plate is provided with a first fixed hinge point; the hydraulic excitation cylinder is arranged on the mounting plate through a first fixed hinge point; one end of the clamping oil cylinder is coaxially connected with the hydraulic excitation cylinder; the tamping pick is movably connected with the other end of the clamping oil cylinder; the oil distribution pipeline is communicated with an oil source and the hydraulic excitation cylinder to supply oil to the hydraulic excitation cylinder so as to supply the reciprocating vibration of the hydraulic excitation cylinder to drive the clamping oil cylinder to vibrate together, and the reciprocating motion of the clamping oil cylinder drives the tamping pick to perform clamping action; the reversing valve is arranged on the oil distribution pipeline and used for reversing to supply oil to the hydraulic vibration cylinder by the oil supply source so as to enable the hydraulic vibration cylinder to vibrate in a reciprocating manner; and the switching valve is communicated with the reversing valve through an oil distribution pipeline and performs switching action to enable the reversing valve to reverse.

The invention provides a hydraulic tamping device, comprising: the mounting plate is provided with a first fixed hinge point, the hydraulic vibration cylinder is mounted on the mounting plate through the first fixed hinge point, one end of the clamping oil cylinder is coaxially connected with the hydraulic vibration cylinder through a flange, the other end of the clamping oil cylinder is movably connected with the tamping pick, an oil source is communicated with the hydraulic vibration cylinder through the oil distribution pipeline and supplies oil to the hydraulic vibration cylinder, so that the hydraulic vibration cylinder can vibrate in a reciprocating manner, the clamping oil cylinder can be driven to vibrate together while vibrating in the reciprocating manner due to the coaxial connection of the hydraulic vibration cylinder and the clamping oil cylinder, the other end of the clamping oil cylinder is movably connected with the tamping pick, the clamping oil cylinder can drive the tamping pick to perform clamping action while reciprocating, and the reversing valve is arranged on the oil distribution pipeline, the switch valve is communicated with the reversing valve through an oil distribution pipeline, high-speed switching action is carried out through the switch valve, the reversing valve is enabled to carry out high-frequency reversing, and then an oil source is used for alternatively distributing oil for the hydraulic vibration excitation cylinder through the oil distribution pipeline, so that the hydraulic vibration excitation cylinder is enabled to carry out high-frequency reciprocating vibration and drive the clamping oil cylinder to carry out high-frequency vibration, and finally the clamping oil cylinder drives the tamping pick to carry out clamping action, and tamping work is completed.

Among the above-mentioned technical scheme, the high frequency reciprocating vibration of hydraulic pressure excitation cylinder is controlled by the reciprocating motion of switching-over valve, and the reciprocating motion of switching-over valve is controlled as the guide's level by the high-speed switch action of ooff valve, carry out the high-speed switch action through the ooff valve, and easy operation is convenient, and easily control can adapt to different operating mode demands, and in addition, the ooff valve is market finished product hydraulic component, has reduced tamping tool's manufacturing cost, and the ooff valve product is reliable, and then has improved tamping tool's job stabilization nature.

The hydraulic tamping device according to the above technical solution of the present invention may further have the following additional technical features:

in the above technical solution, further, the oil source includes: the first oil source supplies oil to the hydraulic excitation cylinder through the oil distribution pipe; and the second oil source supplies oil to the reversing valve through the oil distribution pipeline.

In the technical scheme, the oil source comprises a first oil source and a second oil source, the first oil source is subjected to high-frequency reversing through a reversing valve and supplies oil to the hydraulic vibration cylinder, so that the hydraulic vibration cylinder performs high-frequency reciprocating vibration, the second oil source supplies oil to the reversing valve through high-speed switching action of a switching valve, so that the reversing valve performs high-frequency reversing, the first oil source and the second oil source respectively supply oil to the hydraulic vibration cylinder and the reversing valve, so that the hydraulic vibration cylinder can generate high-frequency reciprocating vibration force to drive the clamping oil cylinder to vibrate, further, the tamping pick is driven to perform clamping action, and stable operation of tamping work is guaranteed.

In the above technical solution, further, the direction valve includes: the reversing valve comprises a reversing valve core, a reversing valve body and reversing valve end covers, wherein the reversing valve body and the reversing valve end covers are arranged on the left side and the right side of the reversing valve core in a surrounding mode to form a working cavity, the reversing valve core is arranged in the working cavity, and the working cavity is divided into a first control cavity and a second control cavity by the reversing valve core.

In the technical scheme, the reversing valve core is arranged in a working cavity enclosed by the reversing valve body and the reversing valve end cover and divides the working cavity into a first control cavity and a second control cavity, the working cavity is divided into two control cavities by the reversing valve core, so that when the switch valve performs high-speed switching action, the second oil source respectively and alternately distributes oil for the first control cavity and the second control cavity, and the pressure in the first control cavity and the pressure in the second control cavity are alternately changed in the process of alternately distributing oil due to the fact that the distributed oil source is high-pressure oil, so that the reversing valve core is subjected to high-frequency reversing.

In the above technical solution, further, the switching valve includes: a first switching valve and a second switching valve; the first switch valve controls the second oil source to be communicated with the first control cavity, the second switch valve controls the second oil source to be communicated with the second control cavity, and the pressure acting area of the first control cavity is equal to that of the second control cavity.

In the technical scheme, the number of the switching valves is two, namely a first switching valve and a second switching valve, the first switching valve controls the communication of the second oil source and the first control cavity, the second switching valve controls the communication of the second oil source and the second control cavity, the pressure action area of the first control cavity is equal to that of the second control cavity, it is further ensured that when the first switching valve and the second switching valve perform high-speed switching action, and the second oil source respectively and alternately distributes oil for the first control cavity and the second control cavity, the pressure in the first control cavity and the second control cavity can be alternately changed, so that the reversing valve core performs high-frequency switching.

In addition, when the tamping device is not operated, that is, when the switch valves are in the initial state, the first switch valve is in the open state, the second switch valve is in the closed state, or the first switch valve is in the closed state, and the second switch valve is in the open state, that is, the high-speed switching operation of the switch valves is controlled, that is, the two switch valves are controlled to be alternately switched on and off.

In the above technical solution, further, the switching valve includes: a third on-off valve; and the third switch valve controls the second oil source to be communicated with the first control cavity, wherein the second control cavity is in a normal pressure state, and the pressure action area of the first control cavity is smaller than that of the second control cavity.

In the technical scheme, the number of the switch valves is one, the switch valves are third switch valves, the third switch valves are communicated with the first control cavity, the second control cavity is in a normal pressure state, and the pressure action area of the first control cavity is smaller than that of the second control cavity, so that when the two control cavities are in a high pressure state, the reversing valve core can perform high-frequency reversing.

In the above technical solution, further, the hydraulic shock excitation cylinder includes: a first hydraulic vibration excitation cylinder and a second hydraulic vibration excitation cylinder; the hydraulic vibration excitation device comprises a hydraulic vibration excitation cylinder piston rod, a first fixing hinge point and a second fixing hinge point, wherein two ends of the hydraulic vibration excitation cylinder piston rod are respectively arranged in a first hydraulic vibration excitation cylinder and a second hydraulic vibration excitation cylinder; the first hydraulic vibration excitation cylinder and the second hydraulic vibration excitation cylinder can rotate around the first fixed hinged point in a plane.

According to the technical scheme, when the reversing valve is used for high-frequency reversing, the first oil source alternately distributes oil for the first hydraulic vibration excitation cylinder and the second hydraulic vibration excitation cylinder through the oil distribution pipeline, and therefore the hydraulic vibration excitation cylinders generate high-frequency reciprocating vibration force.

In the above technical solution, further, the hydraulic tamping device further includes: a PWM (pulse width Modulation) signal controller for controlling the switching valve to perform switching according to the output frequency of the PWM signal so that the second oil source is alternately communicated with the first control cavity and the second control cavity to enable the reversing valve core to reverse; the reversing valve core reverses to supply the first oil source to respectively and alternately distribute oil for the first hydraulic vibration exciting cylinder and the second hydraulic vibration exciting cylinder so as to enable the hydraulic vibration exciting cylinders to vibrate in a reciprocating manner.

In the technical scheme, a PWM signal controls a switch valve to perform high-speed switching action, so that a second oil source is alternately communicated with a first control cavity and a second control cavity and is respectively used for alternately distributing oil for the first control cavity and the second control cavity, and a reversing valve core is subjected to high-frequency reversing.

According to the technical scheme, the switch valve is controlled by the PWM signal to perform switching action, the output frequency of the PWM signal can be adjusted by changing the duty ratio of the PWM signal, and then the on-time of the switch valve in one period is adjusted, so that the reciprocating vibration frequency of the hydraulic vibration exciting cylinder can be adjusted to adapt to various different tamping operation working conditions, and the operation is convenient.

In addition, the output frequency of the PWM signal is easy to control, and the output frequency is stable, so that the tamping device can work stably.

In the above technical scheme, further, the tamping pick includes: the upper arm and the lower arm of the tamping pick; the fixed pin joint of second, the fixed pin joint of second respectively with tamping pick upper arm and tamping pick underarm swing joint, the tamping pick upper arm can rotate in the plane around the fixed pivot point of second with the tamping pick underarm.

In this technical scheme, the tamping pick upper arm is articulated through the fixed pin joint of second with arm under the tamping pick, and the duplex winding second is fixed to articulate the point and is rotated in the plane, when the tamping pick upper arm outwards swings, drives the inward swing of tamping pick lower arm, when the tamping pick upper arm inwards swings, drives the outward swing of tamping pick lower arm.

In the above technical solution, further, the hydraulic tamping device further includes: the other end of the clamping oil cylinder piston is movably connected with the upper arm of the tamping pick, and the clamping oil cylinder piston can drive the upper arm of the tamping pick to rotate in a plane.

In the technical scheme, the hydraulic tamping device further comprises a clamping oil cylinder piston, one end of the clamping oil cylinder piston is installed in the clamping oil cylinder and is matched with the clamping oil cylinder, the other end of the clamping oil cylinder is movably connected with the upper arm of the tamping pick, the clamping oil cylinder piston extends out of the clamping oil cylinder and drives the upper arm of the tamping pick to swing outwards when the clamping oil cylinder does reciprocating motion, and when the clamping oil cylinder piston retracts into the clamping oil cylinder, the upper arm of the tamping pick is driven to swing inwards.

In the above technical solution, further, the hydraulic tamping device further includes an oil tank, based on the condition that the switch valve includes a first switch valve and a second switch valve, the oil tank includes a first oil tank and a second oil tank, the first oil tank is communicated with the reversing valve, and the second oil tank is respectively communicated with the first switch valve and the second switch valve; or based on the condition that the switch valve comprises a third switch valve, the oil tank comprises a third oil tank, and the third oil tank is respectively communicated with the third switch valve and the reversing valve.

In this technical scheme, when the quantity of oil tank is two, including first oil tank and second oil tank, wherein, first oil tank is first oil supply, and the second oil tank is second oil supply, and when the quantity of oil tank was one, for the third oil tank, the third oil tank is first oil supply and second oil supply respectively, through setting up the oil tank, can be so that the tamping device when carrying out the operation, has sufficient oil supply to further guarantee the tamping device and keep stable operating condition.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 shows a schematic structural view of a hydraulic tamping unit according to an embodiment of the present invention;

fig. 2 shows a schematic structural view of a hydraulic tamping unit according to another embodiment of the present invention.

Wherein, the correspondence between the reference numbers and the component names in fig. 1 and fig. 2 is:

the hydraulic control system comprises a mounting plate 1, a first fixed hinge point 2, a hydraulic shock excitation cylinder piston rod 3, a clamping oil cylinder 4, a clamping oil cylinder piston 5, a first hydraulic shock excitation cylinder 6, a second hydraulic shock excitation cylinder 7, a reversing valve spool 8, a reversing valve body 9, a reversing valve end cover 10, a first control cavity 11, a second control cavity 12, an oil distribution pipeline 13, a first switching valve 14, a second switching valve 15, a second switching valve 16, a second fixed hinge point 17, a tamping pick upper arm 18, a tamping pick lower arm 19, a first oil source 20, a first oil tank 21, a second oil source 22, a second oil tank 23, a third switching valve 24.

Detailed Description

So that the manner in which the above recited aspects, features and advantages of the present invention can be understood in detail, a more particular description of the invention, briefly summarized above, may be had by reference to the embodiments thereof which are illustrated in the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

A hydraulic tamping apparatus according to some embodiments of the present invention is described below with reference to fig. 1 and 2.

As shown in fig. 1 and 2, according to a first aspect of the present invention, there is provided a hydraulic tamping device, comprising: the mounting plate 1 is provided with a first fixed hinge point 2; the hydraulic excitation cylinder is arranged on the mounting plate 1 through a first fixed hinge point 2; one end of the clamping oil cylinder 4 is coaxially connected with the hydraulic excitation cylinder; the tamping pick is movably connected with the other end of the clamping oil cylinder 4; the oil distribution pipeline 13 is communicated with an oil source and the hydraulic vibration excitation cylinder to supply oil to the hydraulic vibration excitation cylinder so as to supply the reciprocating vibration of the hydraulic vibration excitation cylinder to drive the clamping oil cylinder 4 to vibrate, and the reciprocating motion of the clamping oil cylinder 4 drives the tamping pick to perform clamping action; the reversing valve is arranged on the oil distribution pipeline 13 and used for reversing to supply oil to the hydraulic vibration cylinder by an oil supply source so as to enable the hydraulic vibration cylinder to vibrate in a reciprocating manner; and the switching valve is communicated with the reversing valve through an oil distribution pipeline 13 and performs switching action to enable the reversing valve to reverse.

In this embodiment, the hydraulic tamping unit includes: the device comprises a mounting plate 1, a hydraulic vibration exciting cylinder, a clamping oil cylinder 4, a tamping pick, an oil distribution pipeline 13, a reversing valve and a switch valve, wherein a first fixed hinge point 2 is arranged on the mounting plate 1, the hydraulic vibration exciting cylinder is mounted on the mounting plate 1 through the first fixed hinge point 2, one end of the clamping oil cylinder 4 is coaxially connected with the hydraulic vibration exciting cylinder through a flange, the other end of the clamping oil cylinder 4 is movably connected with the tamping pick, an oil source is communicated with the hydraulic vibration exciting cylinder through the oil distribution pipeline 13 and supplies oil to the hydraulic vibration exciting cylinder, so that the hydraulic vibration exciting cylinder can vibrate in a reciprocating mode, the hydraulic vibration exciting cylinder is coaxially connected with the clamping oil cylinder 4, the clamping oil cylinder 4 can be driven to vibrate in a reciprocating mode while vibrating in a reciprocating mode, the other end of the clamping oil cylinder 4 is movably connected with the tamping pick, and the tamping pick can be driven to perform clamping action while the clamping, the reversing valve is arranged on the oil distribution pipeline 13, the switch valve is communicated with the reversing valve through the oil distribution pipeline 13, high-speed switching action is carried out through the switch valve, the reversing valve is enabled to carry out high-frequency reversing, and then an oil source is used for alternately distributing oil for the hydraulic vibration excitation cylinder through the oil distribution pipeline 13, so that the hydraulic vibration excitation cylinder is enabled to carry out high-frequency reciprocating vibration and drive the clamping oil cylinder 4 to carry out high-frequency vibration, and finally the clamping oil cylinder 4 drives the tamping pick to carry out clamping action, and tamping work is completed.

Among the above-mentioned technical scheme, the high frequency reciprocating vibration of hydraulic pressure excitation cylinder is controlled by the reciprocating motion of switching-over valve, and the reciprocating motion of switching-over valve is controlled as the guide's level by the high-speed switch action of ooff valve, carry out the high-speed switch action through the ooff valve, and easy operation is convenient, and easily control can adapt to different operating mode demands, and in addition, the ooff valve is market finished product hydraulic component, has reduced tamping tool's manufacturing cost, and the ooff valve product is reliable, and then has improved tamping tool's job stabilization nature.

As shown in fig. 1 and 2, in any of the above embodiments, further, the oil source includes: the first oil source 19, the first oil source 19 supplies oil to the hydraulic excitation cylinder through the oil distribution pipeline 13; and a second oil source 21, wherein the second oil source 21 supplies oil to the reversing valve through the oil distribution pipeline 13.

In this embodiment, the oil source includes a first oil source 19 and a second oil source 21, the first oil source 19 is high-frequency reversed through a reversing valve, and supplies oil to the hydraulic excitation cylinder to make the hydraulic excitation cylinder perform high-frequency reciprocating vibration, the second oil source 21 supplies oil to the reversing valve through high-speed switching action of a switch valve to make the reversing valve perform high-frequency reversing, and the first oil source 19 and the second oil source 21 respectively supply oil to the hydraulic excitation cylinder and the reversing valve to make the hydraulic excitation cylinder generate high-frequency reciprocating vibration force, so as to drive the clamping cylinder 4 to vibrate, further drive the tamping pick to perform clamping action, and ensure stable operation of tamping work.

The first oil source 19 and the second oil source 21 may be the same oil source.

As shown in fig. 1 and 2, in any of the above embodiments, further, the direction valve includes: the reversing valve comprises a reversing valve core 8, a reversing valve body 9 and reversing valve end covers 10 which are arranged on the left side and the right side of the reversing valve core 8, wherein the reversing valve body 9 and the reversing valve end covers 10 are enclosed to form a working cavity, the reversing valve core 8 is arranged in the working cavity, and the working cavity is divided into a first control cavity 11 and a second control cavity 12 by the reversing valve core 8.

In this embodiment, the direction changing valve core 8 is disposed in a working chamber enclosed by the direction changing valve body 9 and the direction changing valve end cap 10, and divides the working chamber into a first control chamber 11 and a second control chamber 12, and the working chamber is divided into two control chambers by the direction changing valve core 8, so that when the switch valve performs high-speed switching, the second oil source 21 respectively and alternately distributes oil to the first control chamber 11 and the second control chamber 12, and because the distributed oil source is high-pressure oil, the pressure in the first control chamber 11 and the second control chamber 12 is alternately changed in the process of alternately distributing oil, so that the direction changing valve core 8 performs high-frequency direction changing.

Wherein, the reversing valve core 8 is a two-position four-way hydraulic control reversing valve core.

As shown in fig. 1, in a specific embodiment, further, the switching valve includes: a first switching valve 14 and a second switching valve 15; the first switch valve 14 controls the second oil source 21 to be communicated with the first control chamber 11, the second switch valve 15 controls the second oil source 21 to be communicated with the second control chamber 12, and the pressure acting area of the first control chamber 11 is equal to that of the second control chamber 12.

In this embodiment, the number of the switching valves is two, and the switching valves are respectively the first switching valve 14 and the second switching valve 15, the first switching valve 14 controls the second oil source 21 to communicate with the first control chamber 11, the second switching valve 15 controls the second oil source 21 to communicate with the second control chamber 12, and the pressure acting area of the first control chamber 11 is equal to that of the second control chamber 12, so as to further ensure that when the first switching valve 14 and the second switching valve 15 perform high-speed switching operation, and the second oil source 21 respectively and alternately distributes oil to the first control chamber 11 and the second control chamber 12, the pressure in the first control chamber 11 and the second control chamber 12 can be alternately changed, so that the reversing valve element 8 performs high-frequency switching.

When the tamping unit is not operating, that is, when the switching valves are in the initial state, the first switching valve 14 is in the open state, the second switching valve 15 is in the closed state, or the first switching valve 14 is in the closed state and the second switching valve 15 is in the open state, that is, the high-speed switching operation of the switching valves is controlled, that is, the two switching valves are controlled to be alternately opened and closed.

The first switch valve 14 and the second switch valve 15 are two-position three-way high-speed switch valves.

In another specific embodiment, as shown in fig. 2, further, the switching valve includes: a third on/off valve 23; the third switching valve 23 controls the second oil source 21 to communicate with the first control chamber 11, wherein the second control chamber 12 is in a normal pressure state, and the pressure action area of the first control chamber 11 is smaller than that of the second control chamber 12.

In this embodiment, the number of the on-off valves is one, the third on-off valve 23 is provided, the third on-off valve 23 is communicated with the first control chamber 11, the second control chamber 12 is in a normal pressure state, and the pressure acting area of the first control chamber 11 is smaller than that of the second control chamber 12, so that when the two control chambers are in a high pressure state, the direction change valve core 8 can perform high-frequency direction change.

The third switch valve 23 is a two-position three-way high-speed switch valve.

As shown in fig. 1 and 2, in any of the above embodiments, the hydraulic excitation cylinder further includes: a first hydraulic shock excitation cylinder 6 and a second hydraulic shock excitation cylinder 7; the hydraulic shock excitation device comprises a hydraulic shock excitation cylinder piston rod 3, wherein two ends of the hydraulic shock excitation cylinder piston rod 3 are respectively arranged in a first hydraulic shock excitation cylinder 6 and a second hydraulic shock excitation cylinder 7, the hydraulic shock excitation cylinder piston rod 3 is matched with the hydraulic shock excitation cylinder, and the hydraulic shock excitation cylinder piston rod 3 is hinged with a first fixed hinged joint 2 so as to be arranged on a mounting plate 1; the first hydraulic excitation cylinder 6 and the second hydraulic excitation cylinder 7 can rotate around the first fixed hinge point 2 in a plane.

In this embodiment, the number of the hydraulic vibration cylinders is two, which are respectively a first hydraulic vibration cylinder 6 and a second hydraulic vibration cylinder 7, two ends of a piston rod 3 of the hydraulic vibration cylinder are respectively installed in the first hydraulic vibration cylinder 6 and the second hydraulic vibration cylinder 7, and the piston rod 3 of the hydraulic vibration cylinder is hinged with the first fixed hinge point 2, wherein the first hydraulic vibration cylinder 6 and the second hydraulic vibration cylinder 7 can rotate in a plane around the first fixed hinge point 2.

As shown in fig. 1 and 2, in any of the above embodiments, further, the hydraulic tamping apparatus further includes: the PWM signal controller is used for controlling the switching valve to perform switching action according to the output frequency of the PWM signal so that the second oil source 21 can be alternately communicated with the first control cavity 11 and the second control cavity 12 to enable the reversing valve core 8 to reverse; the reversing valve core 8 reverses to supply the first oil source 19 to respectively and alternately distribute oil for the first hydraulic vibration exciting cylinder 6 and the second hydraulic vibration exciting cylinder 7 so as to make the hydraulic vibration exciting cylinders vibrate in a reciprocating manner.

In this embodiment, the PWM signal controls the switch valve to perform a high-speed switching operation, so that the second oil source 21 is alternately connected to the first control cavity 11 and the second control cavity 12, and the first control cavity 11 and the second control cavity 12 are alternately filled with oil, respectively, so as to perform high-frequency reversing on the reversing valve element 8, at this time, the first oil source 19 alternately fills oil to the first hydraulic excitation cylinder 6 and the second hydraulic excitation cylinder 7 during the high-frequency reversing of the reversing valve element 8, and because the filled oil source is high-pressure oil, the pressures in the first hydraulic excitation cylinder 6 and the second hydraulic excitation cylinder 7 are alternately changed during the alternate oil filling process, so as to perform high-frequency reciprocating vibration on the hydraulic excitation cylinders, and drive the clamping cylinder 4 to vibrate, and further drive the tamping pick to perform a clamping operation, thereby completing the tamping operation.

According to the technical scheme, the switch valve is controlled by the PWM signal to perform switching action, the output frequency of the PWM signal can be adjusted by changing the duty ratio of the PWM signal, and then the on-time of the switch valve in one period is adjusted, so that the reciprocating vibration frequency of the hydraulic vibration exciting cylinder can be adjusted to adapt to various different tamping operation working conditions, and the operation is convenient.

In addition, the output frequency of the PWM signal is easy to control, and the output frequency is stable, so that the tamping device can work stably.

Since the on-off valve is operated alternately at a high speed, the duty ratio is generally set as required.

In any of the above embodiments, as shown in fig. 1 and 2, further, the tamping pick includes: an upper tamping pick arm 17 and a lower tamping pick arm 18; the fixed pin joint 16 of second, the fixed pin joint 16 of second respectively with tamping pick upper arm 17 and 18 swing joint of tamping pick lower arm, tamping pick upper arm 17 and 18 can rotate in the plane around the fixed pin joint 16 of second in the plane of tamping pick lower arm.

In this embodiment, the upper tamping pick arm 17 and the lower tamping pick arm 18 are hinged by the second fixed hinge point 16 and rotate in a plane around the second fixed hinge point 16, and when the upper tamping pick arm 17 swings outwards, the lower tamping pick arm 18 is driven to swing inwards, and when the upper tamping pick arm 17 swings inwards, the lower tamping pick arm 18 is driven to swing outwards.

As shown in fig. 1 and 2, in any of the above embodiments, further, the hydraulic tamping apparatus further includes: the one end of centre gripping hydro-cylinder piston 5, centre gripping hydro-cylinder piston 5 is installed in centre gripping hydro-cylinder 4 to with centre gripping hydro-cylinder 4 looks adaptation, the other end and the tamping pick upper arm 17 swing joint of centre gripping hydro-cylinder piston 5, centre gripping hydro-cylinder piston 5 can drive the tamping pick upper arm 17 and rotate in the plane.

In this embodiment, the hydraulic tamping device further includes a clamping cylinder piston 5, one end of the clamping cylinder piston 5 is installed in the clamping cylinder 4 and is adapted to the clamping cylinder 4, and the other end of the clamping cylinder piston is movably connected to the tamping pick upper arm 17, when the clamping cylinder 4 performs reciprocating motion, the clamping cylinder piston 5 extends out of the clamping cylinder 4 and drives the tamping pick upper arm 17 to swing outwards, and when the clamping cylinder piston 5 retracts into the clamping cylinder 4, the tamping pick upper arm 17 is driven to swing inwards.

In a specific embodiment, as shown in fig. 1, further, the hydraulic tamping unit further comprises: and the oil tanks include a first oil tank 20 and a second oil tank 22, the first oil tank 20 is communicated with the direction change valve, and the second oil tank 22 is communicated with the first switch valve 14 and the second switch valve 15 respectively.

In this embodiment, the number of the oil tanks is two, and the oil tanks include a first oil tank 20 and a second oil tank 22, wherein the first oil tank 20 supplies oil to the first oil source 19, and the second oil tank 22 supplies oil to the second oil source 21, so that the tamping device can be supplied with sufficient oil source when the tamping device is in operation by arranging the first oil tank 20 and the second oil tank 22, thereby further ensuring that the tamping device keeps a stable working state.

In another specific embodiment, as shown in fig. 2, further, the hydraulic tamping unit further includes: and the oil tank comprises a third oil tank 24, and the third oil tank 24 is respectively communicated with the third switch valve 23 and the reversing valve.

In this embodiment, the number of the oil tanks is one, and the third oil tank 24 is used for supplying oil to the first oil source 19 and the second oil source 21 respectively, and the third oil tank 24 is provided to supply sufficient oil sources to the tamping device during operation, so as to further ensure that the tamping device keeps a stable working state.

In the description of the present invention, the terms "plurality" or "a plurality" refer to two or more, and unless otherwise specifically limited, the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention; the terms "connected," "mounted," "secured," and the like are to be construed broadly and include, for example, fixed connections, removable connections, or integral connections; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description of the present invention, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In the present invention, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.