KR101331612B1 - Apparatus for converting railroad able to power compensating following the change of load - Google Patents

Abstract

The present invention relates to a line switching device capable of compensating an output of a cylinder according to a load change, and more particularly, a plurality of line switching devices are installed along a length direction of a line so that the direction of a line can be changed. In the line switching device, the flow rate provided to the plurality of rod cylinders for the constant velocity movement of the forward and the reverse is always maintained through the plurality of flow distribution means so that the efficient line change is possible, but the load applied to the multiple load cylinders Are different from each other, the flow rate distribution means on the load cylinder side with less load can drive the flow rate distribution means on the load cylinder side with a relatively high load so that the pressure can be increased. Compensation of output of cylinder by load fluctuation is possible As it relates to a switching device.

Description

Line switching device capable of compensating output of cylinder according to load variation {APPARATUS FOR CONVERTING RAILROAD ABLE TO POWER COMPENSATING FOLLOWING THE CHANGE OF LOAD}

The present invention relates to a line switching device capable of efficiently changing a line by allowing a plurality of both rod cylinders for changing a line to discharge the same flow rate through a plurality of flow distribution devices so as to have the same speed motion.

In general, the track changer is an important device for determining the course of operation of a train by being installed at a branch or a plane crossing of a railway, subway, or the like.

As shown in FIG. 1, at the point where the railroad branches or crosses, the position of the tongue rail L2 is changed around the main rail L1 to change the traveling direction of the train.

The normal state is a state in which a train forms a straight line in order to proceed in a straight direction as shown in FIG. It is a state.

The line is changed by changing the position of the tongue rail L2 moving with respect to the main line rail L1 to the positive or negative state through the position change of both rod cylinders 101.

In this way, the role of changing the position of the tongue rail (L2) is the track switching device 100, the tongue rail (L2) is mounted on the rod 102 that is operated by the track switching device 100 is moved. .

The line switching device 100 drives the motor by the driving handling of the positive or negative face in the operation operating room to convert the tongue rail L2 into the positive or negative face direction.

That is, the line is changed while the tongue rail L2 is in close contact with the main line rail L1 or spaced apart according to the driving of the line switching device 100. Of course, it should be provided with a close detector for detecting the contact between the tongue rail (L2) and the main line rail (L1) to prevent accidents in advance.

However, of the existing line converter using the hydraulic pressure that constitutes a plurality of cylinders in series or parallel connection, looking at the line converter having a conventional parallel circuit structure, as shown in Figure 2, the hydraulic motor 110 When driven, if the direction control valve 112 is neutral when the hydraulic pump 111 operates to discharge the flow rate Q1, the P-port is connected to the T-Port so that pressure is not formed.

When the direction control valve 112 is converted to an a-position, the P-port is connected to the A-Port and the two rod cylinders 114 and 115 piped in parallel through the hydraulic line P1. The flow rate is simultaneously supplied to one side (bottom). In addition, the oil on the other side (upper side) of both rod cylinders 114 and 115 is returned to the tank through the B-port and the T-port of the hydraulic line P2 and the directional control valve 113.

)에 릴리프 밸브(112)의 설정압력(Ps)을 곱한 것에 비례하여 힘(F = Ps × Ae × N)이 생성된다. 여기서 N은 양 로드 실린더의 수량이다. 그러나 양 로드 실린더(이하 실린더) 두 개(114, 115) 중 부하(load)가 적게 걸리는 실린더가 먼저 전진 또는 후진하고 그 실린더의 행정이 끝나거나 부하가 같아졌을 때 다른 하나의 실린더가 동작한다. The output of the double rod cylinder 114, 115 is the annular cross-sectional area of the cylinder 114, 115 (

) Is generated in proportion to multiplying the set pressure Ps of the relief valve 112 by force (F = Ps × Ae × N). Where N is the quantity of both rod cylinders. However, one of the two load cylinders (hereinafter, referred to as cylinders), which has a lower load, moves forward or backwards first, and the other cylinder operates when the stroke of the cylinder is finished or the load is the same.

In the case of the line changer of high-speed trains, two to six hydraulic cylinders were used to install the line switching device (locking device), but the contamination of the sliding face of the track (accumulation of foreign objects) and climate change (summer, rainy season, etc.) Due to rainy days or a lot of snow in winter), different frictional resistances occur, which causes the cylinders to be in close contact with the main rail or close to the main rail, and the cylinder, which must be operated at the same time to change the track, does not operate normally. there was.

In addition, referring to FIG. 3, when looking at a line converter having a conventional series circuit structure, when the hydraulic motor 120 is driven, the direction control valve 123 is operated when the hydraulic pump 121 operates to discharge the flow rate Q1. If it is in neutral, the P-port is connected to the T-Port and no pressure builds up.

When the direction control valve 123 is converted to an a-position, the P-port is connected to the A-Port and connected to h1 of both rod cylinders 124 connected in series through the hydraulic line P1. The flow rate is supplied. When the cylinder 124 moves, the flow rate is discharged at h2, and the flow rate is supplied to the h3 through the hydraulic line P3 so that both rod cylinders 125 move, and the flow rate discharged at the h4 is controlled by the hydraulic line P2 and the direction control. It is returned to the oil tank through the B-port and the T-port of the valve 123.

Although the two rod cylinders 124 and 125 have constant velocity displacement in the output range irrespective of the load difference, the outputs of the two cylinders 124 and 125 are as follows.

F124 + F125 = Ae (Ph1-Ph2) + Ae (Ph3-Ph4)

Here, Ph4 = 0 and Ph2 = Ph3, so Ph3 = F125 / Ae, Ph2 = F125 / Ae,

Substituting it down, F124 = AePh1-F9

Thus, F124 + F125 = AePh.

That is, since the two cylinder outputs F124 and F125 are 1/2 of the parallel circuit, the same output can be obtained only by supplying twice the pressure, and the force (output) is reduced by the number of cylinders installed. Even in the case of using a number of rod cylinders, there was a problem in that more pressure must be supplied in the serial structure than the parallel structure.

In the case of three hydraulic cylinders in series as in FIG. 4, the same as in FIG. 3, the P-port is connected to the A-Port when the direction control valve 120 is switched to the a-position (a-Position) And the flow rate is supplied to h1 of both rod cylinders 124 piped in series through the hydraulic line P1, and when both rod cylinders 124 move, the flow rate is discharged from h2, and this flow rate causes the hydraulic line P3 to flow. The cylinder 125 is supplied to h3 and moves, and at this time, the flow rate discharged to h4 is supplied to h5 through the hydraulic pipe P4 so that the cylinder 126 moves and the B of the hydraulic pipe P2 and the direction control valve 123 is moved. Return to oil tank through -port and T-port.

The three double rod cylinders 124, 125 and 126 have constant velocity displacement in the output range regardless of the load difference, but the three double rod cylinder outputs are as follows.

F124 + F125 + F126 = Ae (Ph1-Ph2) + Ae (Ph3-Ph4) + Ae (Ph5-Ph6)

Where Ph0 = 0, Ph2 = Ph3, Ph4 = Ph5, and F124 = F125 = F126

Ph5 = F126 / Ae, Ph4 = F126 / Ae,

If you put them together,

3F = Ae (Ph1-Ph2) + Ae (Ph3-Ph4) + AePh5,

3F = Ae (Ph1).

Thus, F124 + F125 + F126 = A × Ph1, so the three outputs of cylinders F124, F125 and F126 are 1/3 of the parallel circuit. That is, when the series hydraulic circuit is used, the force is inversely proportional to the number of cylinders, and thus there is a problem that more pressure must be supplied.

The present invention has been made to solve the above problems, an object of the present invention by installing a plurality of flow distribution means in a plurality of rod rods that are installed to change the line, so that the same flow rate and pressure is transmitted to operate However, if the oil is insufficient during cylinder operation, oil is replenished through the counter balance valve to prevent cavitation, and even if the cylinder cannot be automatically operated due to a power failure or failure, the hydraulic pressure is manually discharged to a plurality of cylinders at a set pressure. Emergency operation means is provided so that when the loads of a plurality of cylinders are different from each other, the flow rate distribution means on the side with the small load drives the flow rate distribution means on the side with the large load so that the same flow rate is always maintained. Cylinder according to load fluctuation that can be used after being discharged to rod cylinder There is provided a line-switching device, the output compensable.

Other objects and advantages of the present invention will be described hereinafter and will be understood by the embodiments of the present invention. Furthermore, the objects and advantages of the present invention can be realized by means and combinations indicated in the claims.

The present invention is a means for solving the above problems, by controlling the position of the tongue rail in contact with the main rail, in the track change device for changing the line, the working fluid supplied through the hydraulic supply means (10) A direction control valve 20 for controlling the flow direction; A plurality of first and second flow rate distribution means (30, 40), each of which is supplied with a divided working fluid passing through the directional control valve (20); Rods 51 at both ends fixedly installed at the end of the tongue rail are connected to the first and second flow rate distribution means 30 and 40, respectively, the first flow rate distribution means 30 or the second flow rate distribution means 40. A plurality of parallel rod rods 50 arranged in parallel to receive the same flow rate from each other so as to achieve the same constant motion between the two, and to convert the track into a position or a position; Characterized in that consists of.

As described above, the present invention has the effect of enabling the same constant velocity motion by discharging the same flow rate to a plurality of rod cylinders for changing the track.

In addition, the present invention has the effect that the cavitation (cavitation) does not occur by replenishing through the counter balance valve when the cylinder is running out of oil.

In addition, the present invention, even if the automatic operation of the pump and the directional control valve due to a power failure or failure, through the manual emergency operation means, it is possible to operate by discharging the pressure to a plurality of load cylinder at a set pressure There is.

In addition, in the present invention, when the load between the plurality of rod cylinders to be operated is different, the flow rate distribution means (ex: pump) of the load cylinder with a small load may be replaced by another flow rate distribution means on the rod cylinder side with a relatively large load. By driving to increase the pressure, there is an effect to enable the same constant speed movement of a plurality of rod cylinders.

1 is an operation of an embodiment showing the operation of the existing line converter.
Figure 2 is a configuration diagram of an embodiment showing a hydraulic line switching device is composed of a conventional parallel circuit.
Figure 3 is a configuration diagram of an embodiment showing a hydraulic line switching device is composed of a conventional series circuit.
Figure 4 is a block diagram of another embodiment showing a hydraulic line switching device is composed of a conventional series circuit.
Figure 5 is a block diagram of an embodiment showing a line converting apparatus when using two cylinders according to the present invention.
Figure 6 is a block diagram of an embodiment showing a line converting apparatus when using three cylinders according to the present invention.
Figure 7 is a block diagram of an embodiment showing a line converting apparatus when using six cylinders according to the present invention.

Before describing in detail several embodiments of the invention, it will be appreciated that the application is not limited to the details of construction and arrangement of components set forth in the following detailed description or illustrated in the drawings. The invention may be embodied and carried out in other embodiments and carried out in various ways. It should also be noted that the device or element orientation (e.g., "front,""back,""up,""down,""top,""bottom, Expressions and predicates used herein for terms such as "left,"" right, "" lateral, " and the like are used merely to simplify the description of the present invention, Or that the element has to have a particular orientation.

The present invention has the following features in order to achieve the above object.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Prior to this, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms, and the inventor should appropriately interpret the concepts of the terms appropriately It should be interpreted in accordance with the meaning and concept consistent with the technical idea of the present invention based on the principle that it can be defined.

Therefore, the embodiments described in the specification and the drawings shown in the drawings are only the most preferred embodiment of the present invention and do not represent all of the technical idea of the present invention, various modifications that can be replaced at the time of the present application It should be understood that there may be equivalents and variations.

According to an embodiment of the present invention,

A line change device for changing a line by controlling a position of a tongue rail in contact with a main line rail, the line change device comprising: a direction control valve (20) for controlling a flow direction of a working fluid supplied through a hydraulic supply means (10); A plurality of first and second flow rate distribution means (30, 40), each of which is supplied with a divided working fluid passing through the directional control valve (20); Rods 51 at both ends fixedly installed at the end of the tongue rail are connected to the first and second flow rate distribution means 30 and 40, respectively, the first flow rate distribution means 30 or the second flow rate distribution means 40. A plurality of parallel rod rods 50 arranged in parallel to receive the same flow rate from each other so as to achieve the same constant motion between the two, and to convert the track into a position or a position; Characterized in that consists of.

In addition, the first and second flow rate distribution means 30, 40 are connected to each other by the same axis (S1, S2), so that when the load of the plurality of both rod cylinder 50 is different, both load cylinder with a small load The flow rate distribution means connected to 50 drives the flow rate distribution means having a relatively large load to increase the pressure, so as to compensate for the output of both load cylinders 50 in which the load variation is generated.

In addition, manual hydraulic supply means for supplying a working fluid (71); A manual directional control valve 72 capable of manually controlling the moving fluid traveling direction of the manual hydraulic pressure supply means 71; A relief valve 73 installed between the manual hydraulic supply means 71 and the manual direction control valve 72 so that the supplied working fluid can be discharged at a set pressure; A manual on / off valve (74) for allowing a working fluid passed through the manual directional control valve (72) to be supplied to the plurality of first and second flow rate distribution means (30, 40); Emergency operation means 70 is further provided, so that when the hydraulic pressure supply means 10 or the direction control valve 20 is not operated, it is possible to emergencyly operate a plurality of rod cylinders 50.

In addition, the plurality of both rod cylinders 50 are provided with counter balance valves 60 at both ends of the rod rods 50 so that oil discharged from both rod cylinders 50 is stored in the tank 61. When cavitation occurs due to lack of oil during operation of both rod cylinders 50, the oil of the tank 61 is replenished in both rod cylinders 50 through the counter balance valve 60. .

Hereinafter, a line switching device capable of compensating output of a cylinder according to a load change according to an exemplary embodiment of the present invention will be described in detail with reference to FIGS. 5 to 7.

As shown, the line switching device capable of compensating the output of the cylinder according to the load fluctuation according to the present invention includes a hydraulic pressure supply means 10, a direction control valve 20, a first flow rate distribution means 30, a second flow rate distribution Means 40, both rod cylinders 50.

The hydraulic supply means 10 is to supply a working fluid (hydraulic) having a set pressure, this hydraulic supply means 10 is composed of an electric motor 11 and a pump 12, the electric motor 11 is When driven, the working fluid is supplied from the pump 12. In addition, the hydraulic supply means 10 is provided with a relief valve 13, the working fluid supplied from the hydraulic supply means 10 can be discharged to a predetermined pressure of the relief valve 13 to be discharged. .

The directional control valve 20 is connected to the above-described hydraulic pressure supply means 10, more specifically, the pump 12, where the working fluid (hydraulic) is passed through, but controls the direction of the working fluid, Figures 5 to As shown in FIG. 7, when the direction control valve 20 maintains neutrality, only the P and T ports are connected to each other, and are not connected to the A or B ports directed to both rod cylinders 50. The hydraulic fluid is not supplied from the hydraulic supply means 10 to both of the rod cylinders 50 to be described later, and when the direction control valve 20 is connected to the left side of the a-positon A of the direction control valve 20 And the P port are connected to each other, a working fluid is introduced into one end of both rod cylinders 50 to be described later in the hydraulic supply means 10 to operate the rod rods 50 are advanced, the direction control valve ( When connecting 20) to the right side of the b-position, the direction control valve 20 P and B ports are connected to each other, the working fluid is introduced into the other end of the two rod cylinder 50 to be described later, the hydraulic supply means 10, the both rod cylinder 50 is to be reversed operation.

The first flow rate distribution means 30 is connected to the aforementioned direction control valve 20 (more specifically, the A port of the direction control valve 20), and a plurality of them are used in parallel according to an embodiment of the user. The working fluid flowing through the directional control valve 20 is supplied to each of the plurality of rod cylinders 50 to be described later at the same flow rate through the plurality of first flow rate distribution means 30, respectively. (The flow rate distribution hydraulic motor is used as the first flow rate distribution means 30. The same applies to the second flow rate distribution means 40 to be described later.)

That is, when using the two rod cylinder 50 to be described later, as shown in Figure 5, three first flow rate distribution means 30 for supplying the same flow rate to each of the three rod rod cylinder 50 ) Is provided. (ex: as shown in FIG. 6, when two rod cylinders 50 are used, the first flow distribution means 30 is also used two, both rod cylinders 50, as shown in FIG. If six) are used, the first flow rate distribution means (30) is also used.)

In other words, in FIG. 5, three first flow rate distribution means 30 are respectively connected to three load rod cylinders 50, and one end of the three first flow rate distribution means 30 is the direction control described above. It is connected to the A port of the valve 20, the other end is connected to one end of each rod cylinder 50, when the working fluid flows into both rod cylinder 50, the rod 51 of the rod rod 50 Will be driven forward. Of course, for this purpose, the directional control valve 20 must be in the a-position (a-Position), so that the A and P ports must be connected to each other.

In addition, in the case where the load is applied to a plurality of both rod cylinders 50 to be described later, both rod cylinders 50 on the side where the load is relatively less loaded are operated, and both rod cylinders are heavily loaded ( In order to prevent the problem that 50) is post-operated, the plurality of first flow rate distribution means 30 has a state connected to each other on the same axis, the plurality of first flow rate distribution means 30 If the load on each of the two rod cylinder 50 is the same (if there is no pressure difference between each other) serves to transfer the working fluid (hydraulic), but if the load is applied to a plurality of load rods 50 different (When a pressure difference occurs between each other), the first flow rate distribution means 30 connected to the less loaded side of the plurality of rod cylinders 50 is connected to another first flow rate distribution means connected to the heavily loaded side ( 30) By giving to the step-up power, and to win a greater load, the same flow is flowing into the plurality of double rod cylinder (50) to the same constant-speed movement (forward). (The operation of the plurality of first flow distribution means 30 for compensating the output of both rod cylinders 50 in accordance with the load fluctuation to enable effective line switching is the same in the second flow distribution means 40 to be described later. Works.)

For example, if three rod rod cylinders 50 are used and the output of each rod rod cylinder 50 is F1 = F2 = F3, three flow rate distribution means (first flow rate distribution means 30 or later). The pressure passing through the second flow rate distribution means 40) becomes Ps1 = Ps2 = Ps3, but when the outputs of the three rod rods 50 become F1 ≠ F2 ≠ F3, the pressure also becomes Ps1 ≠ Ps2 ≠ Ps3. .

If one of the three rod rods 50 connected to the line moves without a load, the flow rate distribution means generates a torque Tm proportional to the supply pressure as shown in Equation 1 below.

(Where ΔP is the pressure difference (Ps (initial supply pressure)-Ps1 or Ps2 or Ps3), Vth means exclusion volume)

Therefore, the flow rate distribution means under load is operated like the pump 12, the rising pressure (Pup) is as shown in Equation 2 below.

That is, the output of the plurality of rod cylinders 50 is proportional to the supply pressure, so that the pressure is mutually compensated according to the load difference during the line switching, so that a larger force can be applied to the large load. The first flow rate distribution means 30 or the second flow rate distribution means 40 compensates for the effect of making constant speed when moving forward and backward and compensating the force of the plurality of rod rods 50 according to the load variation. It is to enable effective line exchange.

The second flow rate distribution means 40 is connected to the direction control valve 20 together with the aforementioned first flow rate distribution means 30, one end of which is connected to the B port of the direction control valve 20 and the other end thereof will be described later. The second flow rate distribution means 40 is connected to the other end of the two rod cylinders 50 to be operated so that the first flow rate distribution means 30 advances the both rod cylinders 50. The operation of reversing the 50 is performed.

The second flow rate distribution means 40 should be used the same number as the number of both rod cylinders 50, like the first flow rate distribution means 30, that is, both rod cylinders 50 as shown in FIG. If three are used, Formulation 1 and 2 flow rate distribution means (30, 40) is also used each three. The plurality of second flow rate distribution means 40 has a plurality of both the load cylinder (50) when the directional control valve 20 is a b-position (a-Position) and the P and B ports are interconnected By introducing the other end of the rod 51 of both rod cylinder 50 is to be reversed.

In addition, when the second flow rate distribution means 40 is also connected to the same axis and driven, the loads applied to the plurality of rod cylinders 50 are different so that a pressure difference occurs, the plurality of first flow rate distribution means ( 30), the second flow rate distribution means 40 connected to the less loaded side of the plurality of rod cylinders 50 drives another second flow rate distribution means 40 connected to the heavily loaded side. By boosting the pressure, the same flow rate is introduced into both of the rod cylinders 50 so that the same constant speed movement (reverse) is possible.

Both rod cylinders 50 have rods 51 formed at one end and the other end thereof, that is, at both ends thereof, and move forward when the working fluid is supplied to one end and move backward when the working fluid is supplied to the other end. The rods 51 at both ends of the rod cylinders 50 are connected to ends of the tongue rails which are arranged in a plurality of rows on the line, thereby moving the tongue rails from the main rail so as to It is to be able to call direction or face.

Such a plurality of rod rods 50 are mutually arranged and used in parallel as shown in FIGS. 5 to 7.

In addition, the two rod cylinders 50 may be used by a plurality of users (ex: two, three, six, etc.), and the first, The two flow rate distribution means 30 and 40 also use the same number, respectively.

The operating relationship between the hydraulic supply means 10, the first and second flow rate distribution means 30 and 40, and both rod cylinders 50 is shown in FIG. 5 through the two rod cylinders 50 and the first and second flow rate distribution means. When the electric motor 11 is driven and the pump 12 operates, the directional control valve 20 will pass through the check valve C / V. When in the neutral position, the P-port is connected to the T-Port and no pressure builds up. However, when the directional control valve 20 is switched to the a-position (a-Position), the P-port is connected to the A-Port and coupled to the same axis (S1) through another check valve (C / V) After passing through the plurality of first flow rate distribution means 30, respectively, and passes through each of the check valve (C / V) provided in the pipe connecting the two rod cylinder 50 and the first flow rate distribution means 30 with each other The same flow rate is supplied to one end (advancing port) of the plurality of rod cylinders 50 piped in parallel so that the plurality of rod cylinders 50 perform constant velocity motion (forward) regardless of the load.

When a plurality of both rod cylinders 50 move, oil discharged from the ports of the other end of the plurality of rod cylinders 50 passes through a counter balance valve 60 and passes through a pipeline (ex: pipe), respectively. To the tank 61.

In addition, when the direction control valve 20 is switched to the b-position (b-Position), the P-port is connected to the B-Port and coupled to the same axis (S2) through the check valve (C / V) The same flow rate is supplied to the other end (reverse port) of the plurality of rod rods 50 which are passed through each of the two flow rate distribution means 40 and through each of the other check valves C / V, respectively. A plurality of both rod cylinders 50 is a constant velocity (reverse) movement regardless of the load.

Such a plurality of both rod cylinders 50, according to the length of the line (tongue rail) the user uses two as shown in Figure 5, or three as shown in Figure 6, or As shown in Figure 7, such as using six, it is possible to use the installation by adjusting the number and spaced apart from each other.

The emergency operation means 70 is a pump 12 which is one of the hydraulic supply means 10 for the operation (forward and backward) of the above-described plurality of rod rods 50 due to a power failure or a failure. When the control valve 20 does not operate automatically, it is an emergency means for supplying a working fluid manually so that a plurality of both rod cylinders 50 can perform a constant speed motion.

The emergency operation means 70 is composed of a manual hydraulic supply means 71, a manual direction control valve 72, a relief valve 73, a manual on / off valve 74.

The manual hydraulic pressure supply means 71 is a manual pump operated manually, and the manual hydraulic pressure supply means 71 is connected to the P port of the manual direction control valve 72. In addition, the A port and the B port of the manual directional control valve 72 is connected to the connection portion between the first and second flow rate distribution means 30 and 40 and the directional control valve 20, respectively, Each of the on / off valves that can be operated by In addition, a relief valve 73 is installed in the connection pipe between the manual hydraulic pressure supply means 71 and the manual direction control valve 72 so that the discharged working fluid is discharged to the preset pressure of the predetermined relief valve 73 to provide a plurality of relief valves. Allow both rod cylinders 50 to operate.

To describe this operation again, if a problem occurs in a part of the pump 12 or the directional control valve 20 due to a power failure or a failure, and the emergency operation is required manually, the first and second flow rate distribution means 30, 40 A plurality of manual on / off valves 74 in communication with each other), open the manual direction control valve 72 to a desired position (similar to the direction control valve 20 described above, and the manual direction control valve 72). Is located in the a-position on the left side from neutral, the working fluid operates to advance both rod cylinders 50 through the first flow distribution means 30, and the manual directional control valve 72 is moved from neutral to right side. When placed in the b-position, the working fluid operates to reverse both rod cylinders 50 via the second flow rate distribution means 40), and the lever of the manual hydraulic supply means 71 (manual pump) is operated. When the operating fluid is discharged to the set pressure of the relief valve 73 A loading cylinder 50, it is possible to the forward and reverse operation.

In addition, in the present invention, the counter balance valve 60 is installed on both ends of the plurality of rod cylinders 50 described above, and the counter balance valve 60 is installed to be connected to the tank 61. When both rod cylinders 50 move forward and backward, when cavitation occurs due to lack of oil, they are stored in the tank 61 discharged from the opposite port when both rod cylinders 50 move forward or backward. When the oil is replenished through the counter balance valve 60 and the first stroke of the plurality of rod cylinders 50 is finished, the continuously supplied oil exceeds the set pressure of the counter balance valve 60. Return to the tank (61).

In addition, the above-described hydraulic pressure supply means 10, the directional control valve 20, the first flow rate distribution means 30, the second flow rate distribution means 40, both rod cylinder 50, emergency operation means 70, Naturally, all components such as the counter balance valve 60 should be connected to a pipe and a hose through which the working fluid (hydraulic) can flow, and the pipes are provided in such a way that the working fluid can flow only in one direction. Multiple check valves (C / V) are installed, and the pressure gauges 14 and 14 'are installed in the piping of the hydraulic supply means 10 and the emergency operation means 70 to supply the operating fluid supplied at the set pressure. You can also check.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It is to be understood that various changes and modifications may be made without departing from the scope of the appended claims.

10: hydraulic supply means 11: electric motor
12: pump 13, 73: relief valve
14, 14 ': Pressure gauge 20: Directional control valve
30: first flow distribution means 40: second flow distribution means
50: double rod cylinder 51: rod
60: counter balance valve 61: tank
70: emergency operation means 71: manual hydraulic supply means
72: manual directional control valve 74: manual on / off valve
C / V: Check valve S1, S2: Coaxial

Claims (4)

In the line change device which changes a line by controlling the position of the tongue rail which contacts a main line rail,
A direction control valve 20 for controlling a flow direction of a working fluid supplied through the hydraulic supply means 10;
A plurality of first and second flow rate distribution means (30, 40), each of which is supplied with a divided working fluid passing through the directional control valve (20);
Rods 51 at both ends fixedly installed at the end of the tongue rail are connected to the first and second flow rate distribution means 30 and 40, respectively, the first flow rate distribution means 30 or the second flow rate distribution means 40. A plurality of parallel rod rods 50 arranged in parallel to receive the same flow rate from each other so as to achieve the same constant motion between the two, and to convert the track into a position or a position;
Line switching device capable of compensating the output of the cylinder according to the load change, characterized in that consisting of.
The method of claim 1,
The first and second flow rate distribution means (30, 40)
When the loads of the plurality of both rod cylinders 50 are different from each other by being connected to the same axis (S1, S2), the flow rate distribution means connected to both of the rod rods 50 having a small load has a relatively large flow rate distribution. A line switching device capable of compensating the output of a cylinder according to a load variation, by driving a means to boost the pressure, thereby compensating the output of both load cylinders 50 in which the load variation occurs.
The method of claim 1,
Manual hydraulic supply means (71) for supplying a working fluid;
A manual directional control valve 72 capable of manually controlling the moving fluid traveling direction of the manual hydraulic pressure supply means 71;
A relief valve 73 installed between the manual hydraulic supply means 71 and the manual direction control valve 72 so that the supplied working fluid can be discharged at a set pressure;
A manual on / off valve (74) for allowing a working fluid passed through the manual directional control valve (72) to be supplied to the plurality of first and second flow rate distribution means (30, 40);
Further comprising an emergency operating means (70) consisting of, the load to enable the emergency operation of a plurality of both rod cylinder 50, when the hydraulic supply means 10 or the direction control valve 20 is not operated Line switching device that can compensate the output of cylinder according to fluctuation.
The method of claim 1,
The plurality of rod rods 50 are
The counter balance valve 60 is installed at both ends of the rod rods 50 so that oil discharged from the rod rods 50 is stored in the tank 61, and the oil is operated when the rod rods 50 are operated. If this is insufficient, the line switching device capable of compensating the output of the cylinder according to the load fluctuation, characterized in that the oil of the tank 61 is to be replenished in both rod cylinder (50) through the counter balance valve (60).

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