KR200334867Y1 - Hydraulic apparatus for emergency stop device in elevator - Google Patents

Abstract

The present invention relates to an emergency braking hydraulic device for an elevator, and more particularly to an emergency braking hydraulic device for an elevator to emergency stop the elevator car by supplying the pressure of the accumulator to the hydraulic cylinder of the emergency braking device.

In the present invention, since the hydraulic oil is supplied to the hydraulic cylinder of the emergency braking device, an elevator rope braking hydraulic device for braking the elevating of the elevator car, the role of maintaining the filled state of the oil supplied in the hydraulic cylinder Leak prevention means; The manifold block to which the said leak prevention means, a solenoid valve, a check valve, a relief valve, a gauge, and a pressure switch were installed was provided.

Therefore, the present invention maintains the state filled with the hydraulic cylinder by the leak prevention valve to prevent the inflow of air into the hydraulic cylinder, and to prevent the pressure loss of the pressure oil supplied to the hydraulic cylinder through the emergency braking device There is a useful effect that rope braking is ensured. In addition, the present invention is because many components such as solenoid valve is installed in the manifold block in the cartridge type, reducing the cost of parts, it is also very easy to replace and maintain parts.

Description

Emergency apparatus for emergency stop device

The present invention relates to an emergency braking hydraulic device for an elevator, and more particularly, to an emergency braking hydraulic device for an emergency stop of the elevator car by supplying the pressure of the accumulator to the hydraulic cylinder of the emergency braking device to brake the rope.

In general, an elevator installed in a building moves passengers or cargo while moving up and down vertically, and is lifted and lowered without flow by a rope pulled by a motor and a guide shoe guided to a guide rail. Since these elevators are lifted and lowered by the ropes, if the brakes are not easily applied or if the correct braking is not performed, the emergency braking device for clamping the ropes in addition to the main braking device and the emergency braking device are supplied with pressure oil. Emergency braking hydraulic system is provided.

1 and 2 show an elevator rope braking device (Domestic Patent Registration No. 10-0269685) as an example of such a prior art, as shown, the hydraulic pump 21 is a check valve 25 and a relief In connection with the valve 26, the check valve 25 is a directional solenoid valve 24, an accumulator 23 for maintaining a constant pressure of oil, a pressure switch 27 for adjusting the hydraulic pressure, indicating the pressure of the oil It is connected to the pressure gauge 28. And the directional solenoid valve 24 is connected to the hydraulic cylinder 41 of the emergency braking device (30).

Therefore, conventionally, when an emergency stop situation occurs due to the operation of the elevator car, the controller (not shown) detects this and opens the directional solenoid valve 24, so that the pressure oil in the accumulator 23 is transferred to the hydraulic cylinder 41. Instantaneous supply. Accordingly, the rod 41a of the hydraulic cylinder 41 is extended, and the movable plate 31 of the emergency braking device 30 shown in FIG. 3A clamps the rope R together with the fixing plate 32 to lift the elevator car. Will stop running.

When the oil tank 22 side valve of the directional solenoid valve 24 is opened for normal operation of the elevator car, the hydraulic oil in the hydraulic cylinder 41 is diverted to the directional solenoid valve according to the restoration of the spring 33 on the hydraulic cylinder 41 side. It is discharged to the oil tank 22 side through the 24. Therefore, the pressure of the oil supplied to the hydraulic cylinder 41 is lowered, whereby the clamping of the rope (R) is released as shown in Figure 3b to make the normal operation of the elevator car.

However, in the conventional emergency braking hydraulic device 10 for the elevator, when the emergency braking device 30 does not operate, the open state of the directional solenoid valve 24 connected to the oil tank 22 continues, and the hydraulic pressure is maintained. Oil filled in the hydraulic cylinder 41 has gradually leaked into the oil tank 22 due to the feature that the device 10 is installed at a lower position than the hydraulic cylinder 41. Therefore, the hydraulic cylinder 41 has a problem that a considerable amount of air is filled as the oil leaked.

In this state, when the emergency stop situation of the elevator car occurs again, the hydraulic cylinder 41 is refilled with the hydraulic oil from the accumulator 23, but the hydraulic oil is pressurized while replacing the air occupying the hydraulic cylinder 41. This results in a loss of, which prevents the rod 41a of the hydraulic cylinder 41 from extending to a strong momentum.

That is, the oil pressure of the accumulator 23 is set in consideration of the number of passengers and the driving speed of the elevator car, and is set on the premise that the oil cylinder 41 is filled with oil. However, when air is filled in the hydraulic cylinder 41, the pressure of the oil is rapidly extinguished due to the oil to replace the air.

Therefore, the movable plate 31 and the fixed plate 32 of the emergency braking device 30 are only in contact with the rope R as shown in FIG. 3A, and thus cannot substantially clamp the rope R. Many fatal problems have arisen.

On the other hand, in order to prevent leakage due to the difference between the height of the hydraulic cylinder 41 and the hydraulic device 10, there is also a case where a separate pedestal (not shown) is additionally installed. However, since such a pedestal requires separate parts and welding work, the cost competitiveness of the product is lost, and the installation is very limited due to the narrow space of the portion where the hydraulic device 10 is installed.

Further, in the related art, as shown in FIGS. 1 and 2, the directional solenoid valve 24, the check valve 25, the relief valve 26, the pressure switch 27, the pressure gauge 28, and the like are multi-stock type ( Since the structure is combined individually, such as multi-stock type), the structure of the hydraulic device 10 becomes complicated and bulky.

In addition, due to the assembling characteristics between the individual parts can not only use expensive parts unitized, the purchase cost of the parts is much spent, which also raises the problem of increasing the production cost of the product.

The present invention is devised to solve the conventional problems as described above, the object of the present invention is to maintain the state filled in the hydraulic cylinder to prevent the inflow of air in the hydraulic cylinder, accordingly It is to provide an emergency braking hydraulic system for an elevator that can prevent the pressure loss of the pressure oil supplied to the elevator car can be braking the rope.

Another object of the present invention is to install components such as solenoid valves, pressure switches, pressure gauges, check valves, and relief valves in one cartridge type to reduce component costs, and emergency braking for elevators, which allows easy replacement and maintenance of components. To provide a hydraulic system.

1 is a perspective view showing an emergency braking hydraulic device for an elevator according to the prior art,

2 is a hydraulic circuit diagram of the emergency braking hydraulic system for an elevator according to the prior art,

Figure 3a and Figure 3b is a partial cross-sectional view showing the operating state of the emergency braking device for elevators according to the prior art,

Figure 4 is a perspective view of the emergency braking hydraulic device for an elevator according to the present invention,

5 is a hydraulic circuit diagram of the emergency braking hydraulic device for an elevator of the present invention,

Figure 6 shows a manifold block according to the present invention, in particular as a perspective view showing a flow path structure,

7a and 7b is a partial cross-sectional view showing an operating state of the emergency braking device for an elevator according to the present invention.

<Description of Symbols for Main Parts of Drawings>

100: hydraulic device 200: manifold block

210: leak prevention valve 220: solenoid valve

230: check valve 240: relief valve

250: gauge 260: pressure switch

270: accumulator 300: emergency braking device

310: hydraulic cylinder 311: rod

312: spring 320: movable plate

330: fixed plate 400: oil tank

410: hydraulic pump P1 ~ P10: 1 ~ 10 euros

P2a: Pilot Pipe R: Rope

The emergency braking hydraulic device for an elevator of the present invention for achieving the above object is composed of a solenoid valve, a check valve, a relief valve, a gauge, a pressure switch, an oil tank, and supplies pressure to the hydraulic cylinder of the emergency braking device. An elevator rope braking hydraulic system for braking the elevating of an elevator car, comprising: a leak preventing means for maintaining a filled state of oil supplied into a hydraulic cylinder; Leak prevention means, solenoid valve, check valve, relief valve, gauge, characterized in that it comprises a manifold block is installed pressure switch.

Hereinafter, the configuration of the present invention will be described in detail with reference to the accompanying drawings.

4 is a perspective view showing an emergency braking hydraulic device for an elevator according to the present invention, 5 is a hydraulic circuit diagram of the emergency braking hydraulic device for an elevator of the present invention, as shown in the present invention is largely connected to the emergency braking device 300 The manifold block 200 and the oil tank 400 are installed.

First, the manifold block 200 is a leak prevention valve 210, solenoid valve 220, check valve 230, relief valve 240, gauge 250, pressure switch 260 is installed in a cartridge type, For the organic connection and compact appearance of these valves, the first, second, third, fourth, fifth, sixth, seventh, eightth, nineth, tenth euros P1, P2, P3, P4 ( P5) (P6) (P7) (P8) (P9) (P10) was processed and formed.

4 and 6, the first flow path P1 is formed by processing the upper right portion and the lower right portion of the manifold block 200 through the first flow passage P1. The solenoid valve 220 is inserted into the upper portion of the), the lower portion is connected to the oil tank 400.

The second flow path P2 is formed to be formed on the rear side of the first flow path P1, and the leak prevention valve 210, which is a pilot type check valve, is inserted into an upper portion of the second flow path P2. In addition, since the pilot pipe P2a is further connected to the left side of the second passage P2, the pressure oil supplied to the leak prevention valve 210 is piloted.

The third flow path P3 is formed to be processed to connect the lower portion of the rear surface of the manifold block 200 and the leak prevention valve 210 of the second flow path P2, and the rear side of the third flow path P3 is the hydraulic cylinder 310. ). In addition, the fourth flow path P4 is formed to be processed to connect the first flow path P1 and the second flow path P2, and serves to connect the solenoid valve 220 and the leak prevention valve 210.

The fifth flow path P5 is formed by processing the lower portion of the front surface and the lower surface of the manifold block 200 so that the relief valve 240 is inserted into the front side of the fifth flow path P5, and the check valve is provided on the rear side. 230 is inserted into the installation.

The sixth flow path P6 is formed by processing the first flow path P1 and the fifth flow path P5, and the seventh flow path P7 has a bottom left portion and a fifth flow path P5 of the manifold block 200. Formed to process the connection, the seventh flow path (P7) is connected to the hydraulic pump 410.

The eighth flow path P8 is formed to be processed to connect the upper left portion of the manifold block 200 to the first flow path P1. A gauge 250 is coupled to the eighth flow path P8 to install a pressure of the pressure oil. Will be displayed.

The ninth flow path P9 is formed to be processed to be connected to the eighth flow path P8 of the manifold block 200. A pressure switch 260 is installed at the center of the ninth flow path P9 to adjust the pressure of the hydraulic oil. To make it possible.

The tenth flow path P10 is formed to pass through the bottom surface of the manifold block 200 so as to be connected to the fifth flow path P5 and the ninth flow path P9, and the manifold block 200 of the tenth flow path P10 is formed. The bottom side is connected to the accumulator 270.

The operation and effect of the present invention configured as described above are described in detail by dividing the emergency stop of the elevator and the normal operation according to the emergency stop release.

First, the emergency stop process of the elevator car, the control unit of the elevator device not shown, when the emergency stop situation of the elevator car occurs as shown in Figure 5, the solenoid valve 220 connected to the hydraulic cylinder 310 as shown in FIG. Will be opened.

Accordingly, the pressure oil of the accumulator 270 is injected into the hydraulic cylinder 310 through the solenoid valve 220 and the leak prevention valve 210 to extend the rod 311 of the hydraulic cylinder 310. As shown in FIG. 7A, the movable plate 320 and the fixed plate 330 of the emergency braking device 300 clamp the rope R with strong momentum according to the extension of the rod 311 to reliably operate the elevator car. Emergency stop.

On the other hand, when explaining the normal operation process according to the emergency stop of the elevator car, the control unit of the elevator device not shown opens the solenoid valve 220 connected to the oil tank 400 for the normal operation of the elevator car.

Accordingly, since the hydraulic oil in the hydraulic cylinder 310 is discharged to the oil tank 400 through the solenoid valve 220, the rod 311 of the hydraulic cylinder 310 is extended by the elastic restoration of the spring 312. And as shown in Figure 7b the movable plate 320 and the fixed plate 330 of the emergency braking device 300 is released from the clamping state with the rope (R) in accordance with the axis of the rod 311, the elevator car is in normal operation It is possible.

In particular, the present invention is installed between the hydraulic cylinder 310 and the solenoid valve 220, the leak-proof valve 210, which is a pilot check valve, as shown in FIG. 누) Leakage of the oil which has been prevented.

That is, since the leak check valve 210 discharges only a fluid having a predetermined pressure or more due to the characteristics of the pilot check valve, the leak check valve 210 is not affected by the elevation difference between the hydraulic cylinder 310 and the hydraulic device 100. When 312 is completely restored and the oil pressure in the hydraulic cylinder 310 is extinguished, the oil is no longer blocked from being discharged to the solenoid valve 220.

Therefore, since the interior of the hydraulic cylinder 310 maintains a filled state, air is not introduced unlike the prior art. When the emergency stop situation of the above-mentioned elevator car occurs in such a standby state, the pressure of the hydraulic oil supplied from the accumulator 270 is not lost in the hydraulic cylinder 310 and extends the rod 311 to a strong pressure. It also acts to maintain an extended state.

Therefore, as shown in FIG. 7A, the movable plate 320 and the fixed plate 330 of the emergency braking device 300 clamp the rope R with strong momentum, thereby ensuring emergency braking of the elevator car. Will be.

Meanwhile, according to the present invention, as illustrated in FIGS. 4 and 6, the first, second, third, fourth, fifth, sixth, seventh, eighth, nineth, and tenth euros P1, P2, and P3 are provided in the manifold block 200. (P4) (P5) (P6) (P7) (P8) (P9) (P10), and the leak prevention valve 210, solenoid valve 220, check valve 230, and relief valve 240 , Since the gauge 250, the pressure switch 260 directly coupled to the cartridge type structure is installed while simplifying greatly reducing the appearance of the hydraulic device (100).

In more detail, since the manifold block 200 has a structure in which the solenoid valve 220 and the check valve 230 are connected and installed in a cartridge type, the manifold block 200 is easy to assemble and greatly reduces the manufacturing cost associated with the hydraulic apparatus 100. . That is, conventionally, since unitized parts such as expensive unitized solenoid valves 24 and check valves 25 are used, purchase cost is high, the appearance is complicated, and the whole parts are replaced when the parts are replaced or repaired. There was a problem disassembling.

However, the present invention uses the manifold block 200, so no expensive components unitized. Therefore, since the components of the core function are directly coupled to the manifold block 200, the purchase cost of the parts is greatly reduced, and there is an advantage of simply maintaining by separating only the corresponding parts when replacing or repairing the parts.

On the other hand, the above-described embodiment is merely to explain an example of a preferred embodiment of the present invention, the scope of application of the present invention is not limited to such, and can be changed appropriately within the scope of the same idea.

As described above, the present invention installs a leak prevention valve between the hydraulic cylinder and the solenoid valve, thereby continuously maintaining the state filled in the hydraulic cylinder and preventing the inflow of air into the hydraulic cylinder. Therefore, since pressure loss of the hydraulic oil supplied to the hydraulic cylinder does not occur, there is a very useful effect that the braking through the emergency braking device is surely performed.

In addition, the present invention forms a plurality of flow paths in the manifold block, and a leak-proof valve, a solenoid valve, a check valve, a relief valve, a gauge, and a pressure switch are installed in the flow path as a cartridge type. This reduces the cost of purchasing components, simplifies their appearance, and makes it very useful to replace and maintain multiple components installed in the manifold block.

Claims (3)

In the elevator rope braking hydraulic system which includes a solenoid valve, a check valve, a relief valve, a gauge, a pressure switch, an oil tank, and supplies pressure oil to the hydraulic cylinder of the emergency braking device, Leak prevention means for maintaining a filled state of oil supplied into the hydraulic cylinder 310; Elevator rope, characterized in that it comprises a manifold block 200, the leak prevention means, solenoid valve 220, check valve 230, relief valve 240, gauge 250, pressure switch 260 is installed Braking hydraulic system. According to claim 1, wherein the leak prevention means is an elevator rope braking hydraulic system, characterized in that the leak prevention valve 210 is installed between the hydraulic cylinder 310 and the solenoid valve 220 is connected to the check valve. According to claim 1, wherein the manifold block 200 is the first passage (P1) and the installation of the solenoid valve 220 and connected to the oil tank (400); A second passage P2 in which the leak preventing means is installed; A third passage P3 connecting the second passage P2 and the hydraulic cylinder 310; A fourth flow path P4 connecting the first flow path P1 and the second flow path P2; A fifth flow passage P5 to which the check valve 230 and the relief valve 240 are installed; A sixth channel P6 connecting the first channel P1 and the fifth channel P5; A seventh channel P7 connecting the fifth channel P5 and the hydraulic pump 410; An eighth channel P8 connected to the first channel P1 and having a gauge 250 installed therein; A ninth passage P9 connected to the eighth passage P8 and having a pressure switch 260 installed therein; Elevator rope braking hydraulic apparatus for an elevator, characterized in that formed inside the tenth passage (P10) for connecting the fifth passage (P5) and the ninth passage (P9).