JPS5833323B2 - Method and device for tamping the track bed and adjusting the height of the track - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention compacts crushed stone under the sleepers (particularly in the area where the rails and sleepers intersect) using vibration and pressure, and at the same time lifts the track to a desired target position based on a reference system to crush the crushed stone. The present invention relates to a method and apparatus for compacting a track bed and adjusting the height of a track by compacting the track bed to a corresponding degree of compaction.

The degree of compaction of crushed stone in the present invention means the ratio of the unit volume of crushed stone before tamping to the unit volume of crushed stone after tamping.

When the track is straightened using the above method, the track section, which has been previously lifted over a defined track section and compacted with crushed stone underneath, returns to its initial position in a relatively short period of time due to the load caused by the running of the vehicle. I often go back.

In other words, it is well known that, especially in the area of the rail joints of this track, the same settlement occurs in the same places as before.

In order to eliminate this drawback, the track is raised excessively at these points by a predetermined dimension, possibly also in connection with a predetermined correction value, above the target position, so that the final Attempts have been made to correct the trajectory so that it is located at the correct height.

It is also already known to create an artificial reference profile by modifying the target reference line, which corresponds to the final profile after the subsidence of the track or of the crushed stones of the track bed due to the movement of the vehicle.

In this case, the individual correction values functionally correspond to the distance between the reference line and the trajectory, ie to the individual actual measured values.

However, tracks aligned with these known methods still suffer from non-uniform settlements and therefore do not guarantee the required accuracy and durability of the aligned track position.

The compaction pressure can be adjusted in each case to the desired value in relation to the respective geometrical track position or track condition, so that after alignment there is always a uniform degree of crushed stone compaction in the longitudinal direction of the track. It has already been proposed to configure a tamping machine for adjusting the pitch of the voice trajectory so as to produce the following.

In this known proposal, the compaction tool drive is equipped with a control mechanism for controlling the degree of compaction of the crushed stone, which control mechanism detects the respective geometrical trajectory position or trajectory condition. Both are connected to one electrical measurement value generator.

With such a track level adjustment tamping mechanism, expected settlement after track leveling is taken into account.

This is because a good track position is obtained by uniform crushed stone compaction or uniform crushed stone compaction degree.

Further proposals have already been made to use holding devices, which define the target position of the track on the basis of a reference frame, instead of the common track lifting device.

This holding device prevents upward movement of the track beyond the target position.

The crushed stone is then pressed onto the underside of the sleeper during the compaction process until the desired compaction pressure is created under the sleeper.

The object of the invention is to eliminate the aforementioned disadvantages caused by these methods and which occur differently within successive track sections along the track to be leveled.

By correcting the deviation of the geometrical actual height position from the target position, the track or crushed stone track bed will remain in the corrected position (this actually remains for a long time, and furthermore, this position will be subjected to multiple loads over a long period of time). The aim is to ensure that the settlement is maintained even later, in other words that the various subsidences that vary from place to place do not occur at all or at least are significantly reduced.

It has been recognized for the first time by the present invention that the durability of the track position has a suitable and deep relationship between the final degree of compaction and the initially incorrect track height position, taking into account different settlements. be done.

The gist of the method of the present invention is that, in the track height adjustment method described at the beginning, the crushed stone under each sleeper is lifted in proportion to the local maximum lifting amount, that is, the deviation between the target position and the actual position. The crushed stone under each sleeper is tamped until a continuous compaction degree curve proportional to the height deviation change curve is created over a relatively long track section, with the lifting force of the tamping defining the target position. The reason is that it is crimped onto a holding device.

This ensures that all trackbed areas where uneven settlement is particularly pronounced are strongly tamped.

In other words, at this track location, a crushed stone trackbed with a correspondingly high degree of compaction is constructed.

This crushed stone track bed with a large degree of compaction has a high degree of compaction, compared to places where the deviation in the initial height position was so small that it could only be compacted with a correspondingly low degree of compaction. has.

Furthermore, by compacting the crushed stone under the sleepers by means of pressure vibrations in a continuous manner proportional to the respective local uplift, the durability and thus the accuracy of the track position is guaranteed to be the highest (a degree of compaction is ensured). is obtained over the entire length of the trackbed.

To explain with a concrete example, a small height deviation, for example 2 mm? &
Areas with large height deviations, such as loam, are compacted with a relatively low compaction pressure, while areas with large elevation deviations, for example loam, are compacted with a significantly high compaction pressure.

All locations are raised to a predetermined reference line.

When the track bed that has been leveled in this way sinks due to vehicle traffic f, if both points sink, for example, Lmw, the difference in height will be 50% of the initial height deviation in the weakly tamped place, and 50% of the initial height deviation in the strongly tamped place. This means that the ground has sunk by 10% of the initial elevation deviation.

In this way, uniform settling occurs at all points of the track over a long track section, resulting in a correct track height position curve.

In order to carry out the above method, the present invention further comprises a reference system and a track lifting device, as well as a vibration drive device and a moving drive device for applying compaction pressure to the crushed stone. The tamping tool comprises a liftably supported track tamping tool, and at least one electrical measurement value is generated in the tamping tool drive for detecting the respective track position in order to obtain the desired degree of compaction of crushed stone. The present invention relates to a movable device for compacting a track bed and adjusting the height of a track, in which a control mechanism connected to a device is arranged.

A feature according to the invention of this type of track height adjustment tamper is that the control mechanism comprises at least one pressure regulating valve, which together with the measured value generator form a control circuit for the tamping tool. The tamping tool drive is arranged in the supply conduit of the drive and via this pressure regulating valve.

The measuring value generator E is loaded in proportion to the respective local maximum lift, which is thereby converted into an electrical measuring signal;
In addition, a holding device is provided in the area of the track tamping tool to prevent further elevation of the track when the track is raised to the track reference position.

A pressure regulating valve connected to the measured value generator, together with a holding device that limits the uplift of the crushed stone due to compaction, ensures that the correct crushed stone compaction is carried out under each sleeper in each case, commensurate with the deviation between the target position and the actual position. A degree of hardness can be produced.

The control mechanism according to the invention is extremely simple in construction and does not fail.

This is because only the signals emitted in accordance with the local maximum lift need be taken into account, for example by measuring value generators of the type conventionally used in orbital height adjustment titers.

by this. The highest degree of accuracy and, in particular, the reliable ability to produce a continuous compaction degree curve proportional to the height deviation change curve is guaranteed.

Advantages of the invention include (in an embodiment of the invention, in a movable track leveling tamper of this type, a pressure regulating valve arranged in the supply conduit of the mobile drive is provided with a maximum local height deviation; A device 1 for temporarily blocking the transmission of the measurement value signal of the measurement value generator of the measurement value storage and control circuit for storing the corresponding measurement value. If the limit switch is connected
).

In a simple manner, the measured value store only needs to store the maximum local height deviation.

In other words, as the measured value generator connected to the reference system is carried upwards during the orbital lifting process, the increasingly smaller measured values (at the same local location) are detected by the blocking device, which transmits this signal. so it is no longer stored.

This allows only the maximum height deviation at that location to be calculated.
It can be stored directly to the pressure regulating valve or for subsequent delivery.

According to another feature of the invention, a control circuit is provided for supplying pressure to the tamping tool drive in accordance with the respective maximum height deviation detected by the measured value generator. A servo motor coupled to the servo motor is provided.

In this case, too, during the lifting movement at one location or during the compaction process, the signals emitted by the measured value generator in smaller increments are used as signals for the pressure regulating valve. is prevented.

a drive for the tamping tool, in which a pressure regulating valve is arranged on the sides of the sleepers, for example in order to obtain relatively high crushed stone tamping pressures, especially at the rail joints;
Advantageously, it is connected to a drive for a tamping tool which is pushed into the bed in the front region of the sleeper end.

Furthermore, according to the present invention, when the trajectory reaches the target position l,
In order to block the drive of the track lifting device formed by the holding device, it is advantageous to connect a limit value switch and an adjusting element, for example a valve shutoff block, behind the measured value generator.

In that case, as the orbit lifting device, it is possible to use the usual equipment currently used in orbit height adjustment tampers.

In this way, it is sufficient to fix the track lifting device in the zero position by means of an adjusting element of this type.

Large lifts, over a particularly long track section with a number of alternating large and small height deviations, such that the track cannot be raised to the zero position with respect to the reference frame by tamping pressure alone. In the case of quantity,
The measured value generator is equipped with a limit value switch in order to automatically switch the holding device into the function of a track lifting device in the event of a height deviation exceeding a predetermined track height deviation from the target position. It is advantageous to configure the track height adjustment tamper in such a way that it is connected to the adjustment drive of the holding device via.

The invention will now be described in detail with reference to the accompanying drawings.

FIG. 1 shows a track height adjustment tie tamper 1 (hereinafter simply referred to as a tie tamper) of the type generally used at present. (You can drive along this line.

This tamper has a tamping tool 5 mounted on a tamping tool carrier 4 which can be raised and lowered for compacting crushed stone under sleepers 3.

The tamping tool 5 is vibrated by a vibrating drive 6 and is sent oppositely by a displacement drive γ towards the sleepers below which the crushed stone is to be tamped.

As can be clearly seen from the partial plan view of the tamper 1 shown in FIG. are pushed into the crushed stone trackbed at the front regions of both end faces of the sleepers 3, respectively.

In this case, the tamping tool 8 can be moved laterally to the track by means of a moving drive 9, in particular in order to avoid debris escaping towards the side of the track bed during asynchronous tamping operations. .

However, within the scope of the invention, the tie tamper 1 is constructed with a tamping tool support carrying a tamping tool for simultaneously tamping under two adjacent sleepers, as indicated by the thin dashed line in FIG. It is also possible to do so.

In order to adjust the height of the track, the present damper 1 is equipped with a reference system 10, which includes two reference straight lines (Fig. 2) formed by, for example, wire ropes attached to each rail of the track. have.

In order to detect deviations of the track 2 from the reference system 10, a measurement value generator 11. which is guided in the undercarriage frame of the titanper 1 on the rail and can be raised and lowered independently of this. For example, a variable capacitor or a variable resistor is provided.

This measured value generator 11 detects the position of the reference system 10 by means of fork-shaped arms surrounding the reference straight line.

The end points of the reference straight line as well as the measured value generator 11 are guided along the track via a separate carriage.

This truck can be lifted from the track 2 when transporting the titanper 1.

In order to lift the track 2, in front of the tamping tools 5, 8, viewed in the working direction, a track lifting device 12 is arranged, the height of which is adjustable by means of a drive 13, for example a hydraulic cylinder-piston arrangement.

The track lifting device 12 is designed as a holding device, and the distance between the track lifting device 12, which also serves as a holding device, and the tamping tool 5 or 8 in the longitudinal direction of the track is in the exemplary embodiment shown in accordance with that currently customary. It is prescribed by using a titanpa.

This spacing is thus designed in such a way that the tamper can also be equipped with a tool for simultaneously tamping under two adjacent sleepers, as can be seen in FIG.

In the area of the tamping tool, the track lifting or holding device must be as close as possible to the tamping point in order to avoid the track being pushed up too far beyond the target position by the tamping floating blades.

Instead of or in addition to the track lifting device 12, the illustrated tamper can also be provided with further holding devices in the region of the sleepers to be tamped.

In order to correct track misalignments, the single tie tamper is additionally equipped with a reference straight line 14 and a track straightening tool, which in the illustrated embodiment is combined with a track lifting device. There is.

As implied in FIG. 1, the tamping tool drives 6, 7.9, the drive 13 of the track lifting device 12, the measured value generator 11 and the lowering of the tamping tool carrier 4 are The limit switches 15 operated thereby are each connected to a control mechanism 16 for controlling the proportional high-pressure tamping.

This control mechanism will be explained in detail below with reference to FIG.

A manual control switch 11 and a monitor 18 are coupled to the control mechanism for adjustment of the control mechanism 16 and control of its functions by the operator.

Next, the method of the present invention will be explained in detail with reference to the diagram of FIG.

In this diagram, distances in the longitudinal direction of the track are respectively plotted in the direction of the horizontal axis S.

The middle diagram shows the height difference variation curve of the long l track section, and the height deviation △f is plotted in the direction of the vertical axis of the diagram.
calculates the difference between the target position and the actual position of the orbit.

By the way, after tamping the sleepers of this track section, in order to make the track section settle uniformly when the track is under operational load,
the final feed pressure, i.e. the tamping tool 5 at the end of the feed movement;
The pressure in the displacement drives 7, 8 of 8 is selected depending on the magnitude of the height deviation Δf.

The lower diagram shows the magnitude of the final feed pressure P, which is proportional to the respective local lifting amount corresponding to the height deviation △f, in the direction of the vertical axis at some locations along the longitudinal part of the track. are plotted and illustrated in the form of arrows for simplicity.

The final feed pressure PO is, for example, equal to the minimum pressure required when compacting sleepers on or near the zero height deviation line.

As can be seen from the top diagram, in this proportional high-pressure compaction, different degrees of crushed stone compaction VG occur due to the compaction of the crushed stone with different final feed pressures shown in each case. , a continuous compaction degree curve proportional to the height deviation change curve is obtained.

In this case, the required minimum compaction degree VGQ must be obtained under all sleepers.

Track settlement caused by loading on the trackbed is influenced by the final feed pressure, the amount of crushed rock to be compacted, the porosity and density of the trackbed, and the height position of the track after straightening. be done.

In particular, the first load application often causes a very significant permanent deformation of the track transferred to the target position, whereas the subsequent deformation is approximately the logarithm of the number of loads, e.g. of the axle of a train traveling on the track. occurs in proportion to.

Furthermore, experiments have shown that the change in the density of crushed stone under the sleepers caused by the passage of a train over a tamped track is proportional to the logarithm of the total load.

Moreover, changes in the density or degree of compaction of the crushed stone under the sleepers are significantly related to the amount of crushed stone to be compacted, and this amount of crushed stone is roughly proportional to the track height deviation △f. The importance of tamping in proportion to the amount lifted each time is recognized.

For example, crushed stone under a sleeper in the range of large height deviations within the corresponding longitudinal section of the track will be stronger than crushed stone under the sleepers in the range of small height deviations, e.g. Different crushed stone compaction degrees or densities can be obtained in each case.

By proportional high-pressure tamping, a continuous compaction degree curve with different compaction degrees proportional to the height deviation change curve t is formed over a long track section,
Different settlements caused by loading of the track due to passing trains are compensated for or reduced.

For example, a section of the track where a large amount of crushed stone has been compacted due to the presence of a large uplift may have a small amount of crushed stone due to a small uplift due to a high degree of compaction of the crushed stone before the initial loading by train traffic. Compared to track sections that are compacted with a small degree of compaction, it also often settles slowly, with a small percentage of the initial height deviation Δf.

Changes in compaction degree or density of crushed stone due to operating load are
It depends on the amount of crushed stone compacted each time during tamping (which is proportional to the height deviation), and if, for example, a compaction degree curve with the same compaction degree is formed, it will again be different. Therefore, according to the present invention, different degrees of compaction are achieved in proportion to the amount of lifted or crushed stone by proportional high-pressure compaction as seen from the top line in FIG. A compaction degree curve is formed.

This results in a homogeneous density of crushed stone or crushed stone, provided that the same number of loadings or loadings, e.g. the number of axles or the same percentage of the track settlement for the height deviation Δf, are the same after axle loads for the longitudinal sections of the track. This results in a uniform subsidence of the track.

In order to measure the final feeding pressure, a well-known pressure measuring device or the like can be used.

In FIG. 4, a section of the height deviation curve of a long l-track section is shown on a significantly enlarged scale, with the distance in the respective longitudinal direction of the track in the direction of the horizontal axis S and the height deviation in the direction of the vertical axis. Δf or final feed pressure P is shown.

In this figure, the final feed pressure P1 is in the range where the height deviation △f is almost zero.

It is shown by a straight line up to the line Δf=o, where the pressure P1 and the larger pressure P2 . The differential pressure between P3...
It is indicated by a double arrow between the height deviation change curve and the line Δf=o.

Therefore, each feed final pressure P2. P3. P4...
The magnitude of is equal to the final feed pressure P0 expressed by the straight line up to the line Δf-〇 plus the differential pressure indicated by the thick arrows.

Each of these final feed pressures P1. of different magnitudes corresponds to the height deviation Δf. P2. P3. The crushed stones at each track location are sequentially compacted by P4.

Since the track is fixed at the target position by the holding device and therefore acts as a stopper for the floating blade due to tamping, even if tamping is performed with a high final feed pressure P4, the track will not move upward beyond the target position. Don't move.

The final feed pressure P5 t P6 is then relieved again and the trajectory range in the zero position is finally consolidated by the final feed pressure P1.

FIG. 5 shows a simple circuit diagram of the control mechanism 16 shown in FIG.

A measured value generator 11 serving as an input member of the control circuit is coupled to a power supply 19 and thereby delivers to the conductor 20 a voltage or signal proportional to the height deviation, depending on its relative position with respect to the reference system 10. be able to.

This conductor 20 connects a measured value storage 22 to the measured value generator 11 via an amplifier and the contacts of a relay 21 .

This measured value store 22 is designed to store the maximum track height deviation received in each case and is connected to a pressure regulating valve 23, for example an electromagnetic servo valve, which serves as a regulating element in the control circuit. ing.

The pressure regulating valve 23 is arranged in the pressure supply line between the oil tank 24 and the mobile drive 7 or 9.

The measured value generator 11 is furthermore connected via a line 20 to a limit value switch 25, which, in the event of a zero signal, energizes an electromagnetic regulating member 26 which acts as a shut-off valve and thereby interrupts the track maintenance. The drive device 13 of the upper device 12 can be fixed at the zero position of the trajectory, that is, at the target position.

The limit value switch 25 can have a second output, which output is connected to an electromagnetic servo valve 2 serving as a regulating element.
T, which servo valve is inserted in a pressure medium conduit leading from a pump 28 discharging pressure medium to a drive device 13 configured as a hydraulic cylinder-piston device of the orbital lifting device 12. ing.

The operation of the apparatus of the present invention for carrying out the method of the present invention is as follows.

The signal coming from the measured value generator 11 is stored in the measured value store 22 and, during the lowering of the tamping tool support 4 for tamping under the sleepers 3, a limit switch 15 is actuated; As a result, the relay 21 is energized and the transmission of the signal from the measured value generator 11 to the measured value storage 22 is interrupted.

This state causes a signal corresponding to the previously stored maximum local height deviation to be supplied to the pressure regulating valve 23 via the amplifier.

This pressure regulating valve determines the pressure in the supply line for the displacement drive T or 9 in proportion to the maximum local height deviation stored in the measured value store.

The limit switch 15 also operates an electromagnetic valve 29,
Thereby, the pressure medium sent from the tank 24 by the pump 28 is supplied to the mobile drive device T or 9 via the pressure regulating valve 23.

In this connection position, the crushed stone under each sleeper 3 is compacted in proportion to the maximum local uplift in each case, i.e. the deviation between the target position and the actual position, and by means of floating blades due to pressure compaction. It is pressed against the holding or lifting device 12 until a compaction degree curve proportional to the height deviation change curve as shown in the top diagram of FIG. 3 occurs.

II [If the signal proportional to the local maximum height deviation coming from the value generator 11 does not reach the magnitude of the signal set at the second output of the limit value switch 25, the lifting of the track is stopped. This is done solely by means of a floating edge created by tamping the bottom of the sleeper with tamping tools 5, 8, as indicated by the arrow below the sleeper 3 in FIG.

If, on the other hand, the signal exceeds a predetermined magnitude corresponding to a height deviation of, for example, 6 gm, the electromagnetic servo valve 2T is energized and pressure medium is supplied to the drive 13 to maintain the track. The upper device 12 lifts the trajectory to the target position.

However, the local maximum height deviation and the measured value generator 11
Regardless of the magnitude of the signal , the limit value switch 25 blocks the drive 13 in any case once the trajectory has reached the target position, so that the trajectory is fixed by the lifting device 12 in the target position.

Once the final feed pressure defined by the pressure regulating valve 23 has been obtained, the tamping tool carrier with the tamping tool is lifted and releases the limit switch 15, which causes the electromagnetic valve 29 to close the mobile drive 1. , 9 is cut off.

Furthermore, by simultaneous actuation of the relays, the measured value storage 22 is again coupled to the conductor 20 or to the measured value generator 11, so that the height deviation change during the advance to the next sleeper to be tamped is then caused by this sleeper. The maximum local height deviation at the location is detected and stored.

The circuit diagram for the control mechanism 16 according to the invention is shown in a greatly simplified manner for ease of understanding.

As can be seen, the pressure regulating valve 23 connects the supply conduit for the valve 23 or the displacement drive 7.9 to the measured value storage 22.
Alternatively, it may be arranged in a separate control circuit for feedback coupling to a corresponding summing element (comparator).

FIG. 6 shows a schematic circuit diagram of a variant embodiment of the control mechanism 16 shown in FIG.

The action is as follows.

The maximum local height deviation detected by the measured value generator 11 is supplied to the regulating motor or servo motor 30 via the contacts of the relay 21 (FIG. 5).

By actuating the servo motor 30, a threaded spindle is rotated and a moving nut 31 mounted on the spindle is moved in proportion to the respective height deviation.

For controlling the pressure regulating valve 23, the moving nut 31 is connected via a fork and rope arrangement to a measuring value generator 32, for example electrical, such as a rotary potentiometer.

In order to move the displacement nut 31 in the correct quantity in each case by means of the servomotor 30, the measured value generator 32 is connected via a feedback line to a summing element (comparator) 33.

In this way, the respective position of the moving nut 31 is adjusted in proportion to the signal detected by the measured value generator 11.

At that time, as in the embodiment shown in FIG. As a result, a tamping pressure corresponding to the maximum height deviation is maintained until the end of the tamping process.

However, within the scope of the exemplary embodiments, it is also possible for the measured value generator 11 to be coupled to a stepper motor and for the servomotor 30 to be designed as a stepper motor.

In this way, the return conductor shown in the illustrated embodiment may be unnecessary.

The invention is not limited to the illustrated embodiment.

With the tamper according to the invention, which is equipped with two groups of tamping tools for simultaneously processing two adjacent sleepers, extremely uniform work results can be obtained.

Titampers with a hydraulic displacement drive are particularly suitable for carrying out the method of the invention in an asynchronous compaction process, whereas a mechanical spindle drive is suitable for carrying out a synchronous compaction operation. The equipped titanpa can also be used to advantage.

[Brief explanation of the drawing]

The accompanying drawings show embodiments of the present invention, and FIG. 1 is a side view of a titan pawl for adjusting the orbital height according to an embodiment of the present invention, and FIG. 2 is a plan view of a portion of the titan pawl shown in FIG. 1. Figure 3 is a diagram showing the change in height deviation, feed pressure and degree of compaction achieved for a long track section treated according to the invention; Figure 4 corresponds to the height deviation curve and the individual deviation values. FIG. 5 is an implicit circuit diagram of the control mechanism according to the invention, and FIG. 6 is a circuit diagram similar to FIG. 5 of a variant embodiment of the control mechanism with a servo motor. By the way, the correspondence relationship between the main parts shown and the symbols is as follows: 1... Orbit height adjustment titanpa, 2...
- Track, 3...Sleeper, 4...Tamping tool support, 5...Tamping tool, 6...
...Vibration drive device, T-...Movement drive device, 8.
... Tamping tool, 9 ... Mobile drive device, 10 ... Reference system, 11 ... Measured value generator, 12 ... Trajectory Lifting device, 16...
・Control mechanism, 23... Pressure regulating valve, 25...
... Limit value switch, 30 ... Servo motor.

Claims (1)

[Claims] 1. Compact crushed stone under the sleepers, especially in the area where the rails and sleepers intersect, by vibration and pressure, and at this time lift the track to a desired target position based on a reference system and compact the crushed stone accordingly. In the method of tamping the track bed to a compaction level and adjusting the height of the track, the maximum local lifting amount of crushed stone under each sleeper, that is, the deviation between the target position and the actual position, is Compact until a degree of compaction proportional to A method for adjusting the height of a track by compacting the track bed, which is characterized by producing a compaction degree curve. 2. A track tamping tool, which is equipped with a reference system and a track lifting device, a vibration drive device for applying compaction pressure to the crushed stone, and a moving drive device and is supported in a vertically movable manner for compacting the crushed stone under the sleepers of the track. and the tamping tool drive is provided with a control mechanism which is connected to at least one electrical measured value generator for detecting the respective track position in order to obtain the desired degree of compaction of the crushed rock. In the type of track height adjustment tamper that can run, the control mechanism 1
6 is equipped with at least one pressure regulating valve 23 which, together with the measured value generator 11, forms a control circuit and is arranged in the supply line of the tamping tool drive 79. Via the pressure regulating valve 23, the tamping tool drives 7, 9 are activated to determine the respective local maximum lifting amount by the measured value generator 11, which is thus converted into an electrical measuring signal. A patent characterized in that a holding device is provided in the region of the track tamping tool 58 which is proportionately loaded and which prevents a further rise of the track once it has been raised to the track reference position. 3. An apparatus for carrying out the method according to claim 1. 3. An apparatus comprising a reference system and a track lifting device, a vibration drive device and a moving drive device for applying compaction pressure to the crushed stone, and which is installed under the sleepers of the track. It has an orbital tamping tool that is supported so that it can be raised and lowered for compacting crushed stone, and the tamping tool 1
A mobile device of the type in which the drive is provided with a control mechanism which is connected to at least one electrical measured value generator for detecting the respective track position in order to obtain the desired degree of compaction of the crushed stone. In the track height adjustment tamper, the control mechanism 16 includes at least one pressure regulating valve 23,
This pressure regulating valve 23 together with the measured value generator 11
A control circuit is arranged in the supply conduit of the tamping tool drive 19 , through which the tamping tool drive 1 , 9 is electrically powered by the measured value generator 11 via a pressure regulator valve 23 . The measured signal (converted to the local maximum lifting amount in each case) is loaded in proportion to this and is applied in the area of the track tamping tools 5 and 8 when the track rises to the track reference position. is provided with a holding device which prevents a further rise of the track, and applies pressure to the tamping tool drive γ, 9 in accordance with the respective maximum height deviation detected by the measured value generator 11. A servo motor 3 is connected to the pressure regulating valve 23 for supplying
2. Apparatus for carrying out the method according to claim 1, characterized in that a servo motor is connected to the control circuit. 4. A track tamping tool, which is equipped with a reference system and a track lifting device, a vibrating drive for applying compaction pressure to the crushed stone, and a moving drive, and is supported so that it can be raised and lowered to compact the crushed stone under the sleepers of the track. and the tamping tool drive is provided with a control mechanism which is connected to at least one electrical measured value generator for detecting the respective track position in order to obtain the desired degree of compaction of the crushed rock. In the type of movable track height adjustment tamper, the control mechanism 16 is equipped with at least one pressure regulating valve 23,
This pressure regulating valve 23 together with the measured value generator 11
Form a control circuit to drive the tamping tool? , 9, via which the tamping tool drive 7, 9 is connected to the turbidity value generator 1.
1 and is loaded in proportion to the respective local maximum lifting amount, which is converted into an electrical measurement signal by 1, and in the area of the track tamping tools 5, 8, the track is raised to the track reference position. A holding device is provided which prevents the track from rising any further, and which stops the holding device from holding the track when a height deviation from the target position exceeds a predetermined track height deviation. Claim 1, characterized in that the measured value generator 11 is connected via a limit value switch 25 to the adjusting drive of the holding device in order to automatically switch over the function of the upper device 12. Apparatus for carrying out the method.