CN215207992U

CN215207992U - Device for improving safety of escalator

Info

Publication number: CN215207992U
Application number: CN202121224140.9U
Authority: CN
Inventors: 冯双昌; 陈杰; 欧阳惠卿; 常晓清; 范龑君
Original assignee: Shanghai Special Equipment Supervision and Inspection Technology Institute
Current assignee: Shanghai Special Equipment Supervision and Inspection Technology Institute
Priority date: 2021-06-02
Filing date: 2021-06-02
Publication date: 2021-12-17
Anticipated expiration: 2031-06-02

Abstract

The utility model relates to an improve device of automatic escalator security, drive wheel on one side of the drive end of tip drive automatic escalator, the drive wheel passes through the ratchet of connecting axle fixed connection opposite side, the ratchet rear side is equipped with the ratchet pole, the ratchet pole upper end is connected with the pivot, the solenoid valve is connected through the connecting rod in the ratchet pole lower part, reset spring is equipped with on the solenoid valve, electrical switch is installed with the pivot junction in ratchet pole rear side upper end, and speed sensor is installed to automatic escalator's drive host computer step chain department, electrical switch and speed sensor pass through the switch board electricity and connect the solenoid valve. The utility model discloses can prevent effectively that the escalator from avoiding taking place the casualty accident because of the not enough automatic escalator swift current ladder accident that arouses of braking force such as service brake is ageing. The utility model discloses mainly to the escalator that has ratchet or similar structure, effectively utilize limited drive end station space, simple structure, application scope are wide, the commonality is high.

Description

Device for improving safety of escalator

Technical Field

The utility model relates to an automatic staircase safety device, especially a can improve the device of automatic staircase security.

Background

The escalator has been widely used in public places such as shopping malls, stations, subways and the like due to the characteristics of high transportation efficiency, sustainable operation and the like. The brake is an important safety protection device of the escalator. When the escalator runs, the brake is in an open state; when the escalator stops, the brake is in a closed state.

Escalators often employ an end drive system, in which an output torque of a main drive unit is transmitted to a chain of step sprockets. A small chain wheel is arranged on an output shaft of the general driving main machine; a large chain wheel is arranged on the step driving chain wheel shaft and is connected with the step driving chain wheel shaft through a driving chain. At present, the escalator manufactured according to the existing standard generally adopts a double-row chain as a driving chain so as to improve the safety factor of the escalator. However, many escalators imported from japan before 1997 have employed a single-strand chain as a drive chain. In the escalator, a driving chain safety device DCS is arranged in an upper truss, when a driving chain is broken, a shoe rod swings downwards under the action of self weight to drive a rotating shaft to rotate, an electric switch at the head of a ratchet rod acts to cut off a control loop, and a brake acts; meanwhile, the ratchet rod is clamped into the ratchet wheel, so that the escalator is stopped and prevented from sliding downwards.

According to TSG T7005-2012 "elevator supervision and inspection and periodic inspection rule-6.13 additional brake provision in annex a of escalator and moving walkway": instead of using shafts, gears, multiple rows of chains, multiple single rows of chains to connect the service brake and the step drive of the escalator, one or more mechanical (using the principle of friction) additional brakes should be provided. Additional brake specification 5.4.2.2 in GB16899-2011 "safety code for manufacturing and installation of escalators and moving walkways": the additional brake should be active in any of the following situations: a) before the speed exceeds the nominal speed by 1.4 times; b) when the steps change their intended direction of travel. It can be seen that the additional brake can serve both functions. However, in the case of the aforementioned escalator using a single-strand chain as the drive chain, the drive chain safety device DCS can only protect against chain breakage and does not function in the case of overspeed.

In view of the limitations of space size and structure, it is impossible to add an additional brake to an escalator using a single-row chain as a driving chain, and therefore, it is very necessary to develop a device for improving the safety of the escalator.

Disclosure of Invention

The utility model aims to provide an improve device of automatic escalator security for have safety device DCS and similar automatic escalator that has ratchet and ratchet rod structure.

In order to achieve the above purpose, the technical scheme of the utility model is that: the utility model provides an improve device of automatic escalator security, includes the drive wheel of drive end one side of tip drive automatic escalator, the ratchet of connecting axle fixed connection opposite side is passed through to the drive wheel, the ratchet rear side is equipped with the ratchet pole, the ratchet pole upper end is connected with the pivot, the solenoid valve is connected through the connecting rod in the ratchet pole lower part, reset spring is equipped with on the solenoid valve, electrical switch is installed with the pivot junction in ratchet pole rear side upper end, and speed sensor is installed to automatic escalator's drive host computer step chain department, electrical switch and speed sensor pass through the switch board electricity and connect the solenoid valve.

Further, when the speed measuring device detects overspeed or non-operation reversion, the speed measuring device transmits signals to the control cabinet through the connecting line, the control cabinet sends out electric signals to enable the electromagnetic valve to be powered off, the return spring is popped out, the connecting rod extends forwards, and the ratchet rod is clamped into the ratchet wheel, so that the function of effectively stopping the escalator is achieved.

Further, the driving wheel is connected with the driving main machine through a driving chain, a shoe bushing is attached to the driving chain, the shoe bushing is connected with the shoe rod through a bolt, and the shoe rod is connected with the ratchet rod through a rotating shaft.

Further, the electric switch is fixed on the escalator bracket through a fixing hole and a fastener; and the electric switch is provided with a compression spring, and a trigger block for triggering the electric switch is connected with the rotating shaft.

Further, when the driving chain is broken, the shoe rod sinks under the action of gravity to drive the rotating shaft to act, and after the electric switch acts, the control cabinet sends an instruction for powering off the electromagnetic valve after receiving a signal for disconnecting the electric switch, so that the ratchet wheel is clamped by the ratchet rod.

Furthermore, the electromagnetic valve is fixed on the support through a bolt, one end of the connecting rod is connected with a valve core of the electromagnetic valve, the other end of the connecting rod is connected with the ratchet rod through a nut, the connecting rod penetrates through the support, a reset spring and an adjusting nut are installed in the middle of the connecting rod, the right side of the reset spring props against the support, and the left side of the reset spring is pressed by the adjusting nut.

Furthermore, the adjusting nut is in fit connection with the threads on the connecting rod, and the compression amount of the return spring is adjusted through the adjusting nut.

The utility model has the advantages that:

1. the utility model discloses can prevent effectively that the escalator from avoiding taking place the casualty accident because of the not enough automatic escalator swift current ladder accident that arouses of braking force such as service brake is ageing.

2. The utility model discloses mainly to the escalator that has ratchet or similar structure, effectively utilize limited drive end station space, simple structure, application scope are wide, the commonality is high.

3. The adjusting nut can adjust the compression amount of the return spring, and can adjust the thrust of the connecting rod to the ratchet rod after the electromagnetic valve is powered off. When the electromagnetic valve is powered on, the return spring is in a compressed state, the normal operation of the escalator cannot be influenced, and when the electromagnetic valve is powered off, the compressed return spring enables the ratchet rod to be clamped into the ratchet wheel, so that the action torque can be adjusted at any time.

4. The electromagnetic valve can respond quickly without delay time, and after the electromagnetic valve is powered off, the ratchet rod can be quickly and effectively clamped into the ratchet wheel to stop the escalator.

Drawings

Fig. 1 is a schematic view of the whole structure of the device for improving the safety of the escalator of the present invention;

FIG. 2 is a side view of the structure of the device for improving the safety of the escalator;

fig. 3 is a schematic view illustrating the installation of the device for improving the safety of the escalator of the present invention;

in the figure: 1. an escalator frame; 2. a drive wheel; 3. a ratchet wheel; 4. a drive chain; 5. a rotating shaft; 6. an electrical switch; 61. a compression spring; 62. a first fixing hole; 63. a second fixing hole; 7. a boot shaft; 8. a ratchet rod; 81. an elastic pin; 9. a shoe liner; 10. an electromagnetic valve; 11. a support; 101. a connecting rod; 102. a return spring; 103. a first bolt; 104. a second bolt; 105. a nut; 106. adjusting the nut; 11. a support; 12. a speed measuring switch; 13. a control cabinet; 14. and triggering the block.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings and examples.

As shown in fig. 1 and 2, a device for improving the safety of an escalator is mainly based on a driving chain safety device DCS installed on an escalator truss 1, by adding a speed measuring device 12, an electromagnetic valve 10, a connecting rod 101 and other components, under the conditions of chain breakage of a driving chain, overspeed of the escalator or non-operation reversion, the components are transmitted to a control cabinet 13 through a connecting wire, so that the electromagnetic valve 10 is powered off, a spring 102 is ejected, the connecting rod 101 extends forwards, a ratchet rod 8 is clamped into a ratchet 3, and the function of effectively stopping the escalator is achieved. The escalator driven by the end part is characterized in that one side of a driving end is provided with a driving wheel 2, the other side of the driving end is provided with a ratchet wheel 3, the driving wheel 2 is connected with a driving host machine through a driving chain 4, a shoe bush 9 is tightly attached to the driving chain and connected with a shoe rod 7 through a bolt, the shoe rod is connected with a ratchet rod 8 through a rotating shaft 5, meanwhile, an electric switch 6 is arranged at the joint of the upper end of the ratchet rod 8 side and the rotating shaft, an electromagnetic valve 10 is arranged on a support 11, and a connecting rod 101 is provided with threads and penetrates through a reset spring 102.

As shown in fig. 2, in the escalator drive wheel safety device DCS, the elastic pin 81 of the ratchet lever 8 and the rotating shaft 5 is removed to allow the ratchet lever 8 to rotate around the rotating shaft 5, the electrical switch 6 is installed at the rotating shaft 5 at the upper end of the ratchet lever 8, and the electrical switch 6 is operated when the rotating shaft 5 rotates. When the escalator operates, the electromagnetic valve 10 is electrified, so that the ratchet rod 8 moves rightwards and keeps the motion state. The shoe bush 71 on the shoe rod 7 is tightly attached to the driving chain 4, when the driving chain is broken, the shoe rod 7 sinks under the action of gravity, the rotating shaft 5 is driven to act, the electric switch 6 acts, and the control cabinet sends out a command for powering off the electromagnetic valve 10 after receiving a signal for disconnecting the electric switch 6, so that the ratchet rod 8 clamps the ratchet wheel 3.

When a speed measuring device 12 arranged at the step chain of the driving host detects overspeed or non-operation reversion, the control cabinet also sends out an instruction to ensure that the electromagnetic valve 10 is powered off, the return spring 102 is ejected, and the connecting rod 101 is further pushed to ensure that the ratchet rod 8 rotates and is clamped into the ratchet wheel 3.

As shown in fig. 3, the solenoid valve 10 is fixed on the bracket 11 by a first bolt 103 and a second bolt 104, one end of the connecting rod 101 is connected with the valve core of the solenoid valve 10, the other end of the connecting rod 101 is connected on the ratchet rod 8 by a nut 105, the connecting rod 101 penetrates through the bracket 11, a return spring 102 and an adjusting nut 106 are installed in the middle of the connecting rod 101, the connecting rod 101 is provided with threads within the travel distance, so that the right side of the return spring 102 is supported against the bracket 11 and is fixed firmly, the left side of the return spring is pressed by the adjusting nut 106, the adjusting nut 106 can be matched with the threads on the connecting rod 101 to adjust the compression amount of the return spring, and when the return spring 102 is in a compression state. The electric switch 6 is fixed on the escalator bracket 1 through the first fixing hole 62 and the second fixing hole 63, and the compression spring 61 is arranged on the electric switch 6 and used for triggering the triggering block 14 of the electric switch 6 to be connected with the rotating shaft 5. When the escalator is in chain breakage of a driving chain, the electric switch 5 is transmitted to the control cabinet 13 through a connecting wire, so that the electromagnetic valve is powered off, and the ratchet rod 8 is inserted into the ratchet wheel 3 through the return spring 102, so that the escalator stops running.

Claims

1. The utility model provides an improve device of escalator security, includes the drive wheel of drive end one side of tip drive escalator, its characterized in that: the driving wheel is fixedly connected with a ratchet wheel on the other side through a connecting shaft, a ratchet rod is arranged on the rear side of the ratchet wheel, the upper end of the ratchet rod is connected with a rotating shaft, the lower portion of the ratchet rod is connected with an electromagnetic valve through a connecting rod, a return spring is arranged on the electromagnetic valve, an electric switch is arranged at the joint of the upper end of the rear side of the ratchet rod and the rotating shaft, a speed measuring device is arranged at the step chain of a driving host of the escalator, and the electric switch and the speed measuring device are electrically connected with the electromagnetic valve through a control cabinet.

2. A device for increasing the safety of an escalator as claimed in claim 1, wherein: when the speed measuring device detects overspeed or non-operation reversion, the speed measuring device transmits signals to the control cabinet through the connecting wire, the control cabinet sends out electric signals to enable the electromagnetic valve to be powered off, the reset spring pops out, the connecting rod extends forwards, and the ratchet rod is clamped into the ratchet wheel, so that the function of effectively braking the escalator is achieved.

3. A device for increasing the safety of an escalator as claimed in claim 1, wherein: the driving wheel is connected with the driving main machine through a driving chain, a shoe bushing is attached to the driving chain, the shoe bushing is connected with the shoe rod through a bolt, and the shoe rod is connected with the ratchet rod through a rotating shaft.

4. A device for increasing escalator safety as claimed in claim 3, wherein: the electric switch is fixed on the escalator bracket through the fixing hole and the fastener; and the electric switch is provided with a compression spring, and a trigger block for triggering the electric switch is connected with the rotating shaft.

5. An escalator safety enhancement device as claimed in claim 4, wherein: when the driving chain is broken, the boot rod sinks under the action of gravity to drive the rotating shaft to act, and after the electric switch acts, the control cabinet sends out a command of powering off the electromagnetic valve after receiving a signal of breaking the electric switch, so that the ratchet wheel is clamped by the ratchet rod.

6. An escalator safety-improving device according to any one of claims 1-5, characterized in that: the electromagnetic valve is fixed on the support through a bolt, one end of the connecting rod is connected with a valve core of the electromagnetic valve, the other end of the connecting rod is connected onto the ratchet rod through a nut, the connecting rod penetrates through the support, a reset spring and an adjusting nut are installed in the middle of the connecting rod, the right side of the reset spring abuts against the support, and the left side of the reset spring is pressed by the adjusting nut.

7. An escalator safety enhancement device as claimed in claim 6, wherein: the adjusting nut is connected with the threads on the connecting rod in a matched mode, and the compression amount of the return spring is adjusted through the adjusting nut.