KR101337721B1 - Personnel transfer system and braking capacity test method of it - Google Patents

Abstract

The present invention relates to a personnel transfer system which safely transfers people such as operators and crews of a ship by additionally simply installing a machine and a hydraulic control machine in an existing crane winch system for loading and unloading. The personnel transfer system is made of an oil tank; a hydraulic pump which transfers oil through an oil supplying line by being driven by an electric motor; a personnel transfer winch hydraulic motor which is combined with a personnel transfer winch rotary axis and rotates a personnel transfer winch; a first manual operation valve in which one side is combined with the oil supplying line and an oil recovery line for returning the oil to the oil tank and the other side is combined with first and second hydraulic supplying lines connected to the personnel transfer winch hydraulic motor and which selectively supplies oil pressure to the first and second hydraulic supplying lines; a counter balance valve for forming back pressure by being installed on the second hydraulic supplying line; first and second brakes which are combined with the personnel transfer winch rotary axis and put on the brakes of the rotation of the personnel transfer winch rotary axis; and a first shuttle valve in which both entrances are connected to a first branch line of the first hydraulic supplying line and a second branch line of the second hydraulic supplying line, respectively and an exit is connected to a brake lifting hydraulic supplying line for supplying oil pressure to first and second brake cylinders. [Reference numerals] (AA) Power supply

Description

Personnel transfer system and braking capacity test method of it}

The present invention relates to a personnel transport system and a braking performance test method, and more particularly, by adding a mechanical and a hydraulic control device to the crane winch system for loading and unloading a ship, the personnel to safely get on and off the ship or worker A transfer system and its braking performance test method.

In general, the movement of personnel between ships and ships or support ships has been used by small vessels, ladders, etc., and people on boarding ships have used equipment such as gangway, ladders, and ropes.

However, in the existing ships, the personnel transfer method is difficult to secure the safety of personnel due to the special environment of the sea and the large difference in height between the transfer points due to the enlargement of the vessel, and the vessel approaches the other ship or the pier. In addition to the difficulties that must be made, there is a problem of creating an environment in which safety accidents are frequently caused due to aging of equipment such as ladders and ropes and unskilled user.

In order to solve such a problem, an attempt has been made to transfer personnel by using an unloading crane winch system which is basically installed on a ship, and as a technology for a ship crane winch system, registered Korean Utility Model Publication No. 20-0450685 (published October 21, 2010).

However, such a crane winch system for ships is designed and manufactured for loads, there is a problem that there is a lack of safety to move personnel.

Invented to solve the problems as described above, the present invention by simply installing a mechanical and hydraulic control device to the existing crane crane winch system to safely transport the personnel of the ship's crew, workers, etc. It is an object of the present invention to provide a conveying system and a braking performance test method.

In addition, an object of the present invention is to provide a personnel transfer system and a braking performance test method for evacuating personnel safely in the event of failure of the mechanical and hydraulic control device installed in the crane winch system for loading and unloading.

In addition, an object of the present invention is to provide a personnel transport system and a braking performance test method that can be added to the safety check device of the unloading crane winch system to prevent the safety accidents such as falls.

In addition, an object of the present invention is to provide a personnel transport system and a braking performance test method that can add a means for preventing the interference between the operating lever to prevent the safety accident and the failure of the equipment in advance.

As a means for solving the above problems, the present inventors personnel transport system,

It is a personnel transport system using a crane.

Oil pump, hydraulic pump driven by electric motor to pump oil through oil supply line,

Hydraulic motor for personnel transfer winch, combined with personnel transfer winch rotary shaft to rotate personnel transfer winch,

One side is coupled to the oil recovery line and the oil supply line for recovering oil to the oil tank, the other side is coupled to the first and second hydraulic supply lines connected to the hydraulic motor for the personnel transfer winch first and second A first manually operated valve for selectively supplying hydraulic pressure to the hydraulic supply line,

A first counter balance valve installed in the second hydraulic supply line to form back pressure,

First and second brakes coupled to the human feed winch rotating shaft to brake rotation of the human feed winch rotating shaft;

Both inlets are connected to the first branch line of the first hydraulic supply line and the second branch line of the second hydraulic supply line, respectively, and the outlet to the first brake release hydraulic supply line to supply hydraulic pressure to the first and second brake cylinders. It characterized in that it comprises a first shuttle valve is connected.

And hoisting winch,

Hydraulic motor for hoisting winch, combined with hoisting winch rotary shaft to rotate the personnel transfer winch,

One side is combined with an oil recovery line and the oil supply line for recovering oil to the oil tank, and the other side is combined with third and fourth hydraulic supply lines connected with the hydraulic motor for the hoisting winch to form a third and fourth. A second manual valve for selectively supplying hydraulic pressure to the hydraulic supply line,

A second counter balance valve installed in a fourth hydraulic supply line to form back pressure,

A third brake coupled to the hoisting winch rotary shaft to brake rotation of the hoisting winch rotary shaft;

A second inlet connected to a third branch line of the third hydraulic supply line and a fourth branch line of the fourth hydraulic supply line, respectively, and an outlet connected to a second brake release hydraulic supply line supplying hydraulic pressure to the third brake cylinder; It characterized in that it further comprises a shuttle valve.

The first brake release hydraulic supply line is branched to be connected to the first and second brake cylinders, and the first and second ball valves are provided on the branched first brake release hydraulic supply lines, respectively. do.

And an emergency hydraulic supply line connecting the oil tank and the first hydraulic supply line.

It is characterized in that it further comprises a manual operation pump provided on the emergency hydraulic supply line.

And roughing cylinders,

One side is combined with an oil return line and the oil supply line for recovering oil to the oil tank, and the other side is combined with fifth and sixth hydraulic supply lines connected with the roughing cylinder to the fifth and sixth hydraulic supply lines. A third manually operated valve for selectively supplying hydraulic pressure,

Slewing winch,

Hydraulic motor for slewing winch to rotate the slewing winch and

One side is combined with an oil return line and the oil supply line for recovering oil to the oil tank, and the other side is combined with a seventh and eighth hydraulic supply lines connected with the hydraulic motor for the slewing winch, and the seventh and eighth And a fourth manual operation valve for selectively supplying hydraulic pressure to the hydraulic pressure supply line.

And between the respective operating lever for operating the first and second manual control valve is characterized in that the lever interference prevention device for preventing the interference between the operating lever is further provided.

In addition, the present invention is a braking performance test method of the personnel transport system,

Opening both the first and second ball valves,

Applying a test load load to the crane hook and positioning it spaced apart a certain distance from the top,

Closing the ball valve of any one of the first and second ball valves while operating the personnel transfer winch by operating the first manually operated valve;

Checking braking performance and

And opening the closed ball valve.

Through the problem solving means as described above, the present inventors personnel transport system and its braking performance test method is simply installed by adding a mechanical and hydraulic control device to the existing crane winch system for loading and unloading vessels despite the special environment of the sea It is possible to safely transport personnel such as workers, workers, etc., and to evacuate personnel safely even when the machinery and hydraulic control device installed in the crane crane winch system are additionally installed, and the safety check device of the crane crane winch system is added by Safety accidents such as falling can be blocked at the source, and there is an advantage that can prevent the safety accidents and equipment failure due to malfunction by adding a means for preventing the interference between the operating lever.

1 is a view schematically showing a crane equipped with a personnel transport system according to the present invention.
2 is a schematic diagram illustrating a personnel transport system according to the present invention.
3 is a hydraulic circuit diagram schematically showing a personnel transport system according to the present invention.
4 is a view schematically showing an embodiment of the lever interference prevention device of the personnel transport system according to the present invention.

Preferred embodiments of the personnel transport system according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a view schematically showing a crane equipped with a personnel transport system according to the present invention, Figure 2 is a schematic diagram showing a personnel transport system according to the present invention, Figure 3 is a personnel transport system according to the present invention Figure 4 is a schematic hydraulic circuit diagram, Figure 4 is a view schematically showing an embodiment of the lever interference prevention device of the personnel transport system according to the present invention.

As shown in Figure 1, the personnel transport system according to the present invention is a system for safely transporting the personnel of the ship's crew, workers, etc. by installing a mechanical and hydraulic control device to the existing unloading crane.

For this purpose, the existing unloading crane has a hoisting winch (1 ') winding the hoisting wire, a roughing cylinder (2) for adjusting the angle of the jib, and a slewing rotating the crane house. A winch (Slewing winch) 3 is provided.

In addition to the personnel transfer system according to the present invention, as shown in Figures 2 and 3, personnel transfer winch (1), oil tank (5), hydraulic pump (6), hydraulic motor for personnel transfer winch (7) ), First manual override valve (8), first counter balance valve (9), first and second brakes (10, 11), first shuttle valve (12), first and second ball valves (14, 15), the third manual operation valve 16, the slewing winch hydraulic motor 17, the fourth manual operation valve 18 and the like.

Here, the oil tank 5 is a tank for storing the oil supplied to the hydraulic control device of the crane, it is preferable to use the oil tank installed in the existing crane.

The hydraulic pump 6 is a pump driven by the electric motor 20 controlled by the controller 19 to pump oil through the oil supply line 21.

The hydraulic motor 7 for the personnel transport winch is coupled to the personnel transport winch rotation shaft 22 to rotate the personnel transport winch 1 to wind or unwind the personnel transport wire on the personnel transport winch 1 to open the hook 23. Perform the function of lifting or lowering.

The first manual operation valve 8 is coupled to an oil return line 24 and an oil supply line 21, one side of which recovers oil to the oil tank 5, and the other side of the first hydraulic valve for hydraulic pressure for the personnel transfer winch. An actuating lever 4 as a valve for selectively supplying hydraulic pressure to the first and second hydraulic supply lines 25 and 26 in combination with the first and second hydraulic supply lines 25 and 26 connected to the motor 7. Manipulated by

The first counter balance valve 9 is a valve installed in the second hydraulic supply line 26 to form a back pressure to prevent the personnel transfer winch 1 from being reversed by the gravity of the load.

The first and second brakes 10 and 11 are brakes coupled to the personnel transport winch rotation shaft 22 to brake rotation of the personnel transport winch rotation shaft 22. The personnel transport winches are provided by elastic means such as springs. Pressing the rotating shaft 22 to maintain a braking state is configured to be released when the hydraulic pressure is applied.

The first and second brakes 10 and 11 are preferably installed on the personnel transport winch rotation shaft 22 on both sides of the personnel transport winch drum 27, respectively.

The first shuttle valve 12 has both inlets connected to the first branch line 28 of the first hydraulic supply line 25 and the second branch line 29 of the second hydraulic supply line 26, respectively. The outlet is a valve connected to a first brake release hydraulic supply line 32 which supplies hydraulic pressure to the first and second brake cylinders of the first and second brakes 10, 11.

Referring to the operation process of the personnel transport system according to the present invention through the configuration as described above, when the personnel transport wire is first released by the personnel transport winch 1, the electric motor 20 by the control device 19 ) Drive the hydraulic pump (6), the oil is oil tank (5)-> oil supply line (21)-> first manual override valve (8)-> first hydraulic supply line (25)- > Hydraulic motor for personnel transfer winch (7)-> 2nd hydraulic supply line (26)-> 1st counter balance valve (9)-> 2nd hydraulic supply line (26)-> 1st manual operation By rotating the hydraulic motor (7) for the personnel transfer winch while circulating in the order of the valve (8)-> oil return line (24)-> oil tank (5), and drives the personnel transfer winch (1), A portion of the oil passing through the first hydraulic supply line 25 is passed through the first branch line 28-> first shuttle valve 12-> first brake release hydraulic supply line 32-> first And second brake seal It is supplied in the order of the Linder to release the first and second brakes (10, 11).

On the other hand, when the personnel transfer wire is wound by the personnel transfer winch 1, when the electric motor 20 drives the hydraulic pump 6 by the control device 19, the oil is supplied to the oil tank 5-> oil supply. Line 21-> first manual override valve (8)-> second hydraulic supply line (26)-> first counter balance valve (9)-> second hydraulic supply line (26)- > Hydraulic motor for personnel transfer winch (7)-> 1st hydraulic supply line (25)-> 1st manual override valve (8)-> oil return line (24)-> oil tank (5) By rotating the hydraulic motor for personnel transfer winch 7 while circulating in order to drive the personnel transfer winch 1, at this time, a part of the oil passing through the second hydraulic supply line 26 is the second branch line 29. -> First shuttle valve 12-> first brake release hydraulic supply line 32-> first and second brake cylinders are supplied in order to release the first and second brakes 10, 11 Let's go.

When the personnel transfer winch 1 is not operated, the oil supplied to the first and second brake cylinders is cut off, and the first and second brakes 10 and 11 are braked.

In addition, the personnel transfer system according to the present invention, with respect to the hoisting winch 1 ', as shown in Figures 2 and 3, the hydraulic motor 7' for the hoisting winch, the second manual valve 8 ' ), A second counter balance valve 9 ', a third brake 10', and a second shuttle valve 12 '.

Here, the hoisting winch hydraulic motor 7 'is coupled to the hoisting winch rotating shaft 22' to rotate the hoisting winch 1 'to wind the hoisting wire to the hoisting winch 1' Loosen to lift or lower the hook 23 '.

The second manual valve 8 ′ is coupled to an oil return line 24 and an oil supply line 21 at which one side recovers oil to the oil tank 5, and the other side is the hoisting hydraulic motor. Coupled with third and fourth hydraulic supply lines 25 ', 26' connected to 7 'and acting as a valve for selectively supplying hydraulic pressure to third and fourth hydraulic supply lines 25', 26 '. It is operated by the lever 4.

The second counter balance valve 9 'is a valve installed in the fourth hydraulic supply line 26' to form a back pressure to prevent the hoisting winch 1 'from being reversed due to the gravity of the load. .

The third brake 10 'is a brake which is coupled to the hoisting winch rotating shaft 22' and brakes rotation of the hoisting winch rotating shaft 22 ', and the hoisting winch rotating shaft (by elastic means such as a spring) 22 ') is pressurized to maintain a braking state and is released when hydraulic pressure is applied.

The third brake 10 'is preferably installed on the hoisting winch rotation shaft 22' of one side of the hoisting winch drum 27 '.

The second shuttle valve 12 ′ has both inlets at the third branch line 28 ′ of the third hydraulic supply line 25 ′ and the fourth branch line 29 of the fourth hydraulic supply line 26 ′, respectively. ') And the outlet is connected to a second brake release hydraulic supply line 32', which supplies hydraulic pressure to the third brake cylinder of the third brake 10 '.

Referring to the operation process of the personnel transfer system hoisting winch according to the present invention through the configuration as described above, when the hoisting wire is first released by the hoisting winch 1 ', by the control device 19 When the electric motor 20 drives the hydraulic pump 6, the oil is fed into the oil tank 5-> oil supply line 21-> second manual override valve 8 '-> third hydraulic supply line. (25 ')-> Hydraulic motor for hoisting winch (7')-> 4th hydraulic supply line (26 ')-> 2nd counter balance valve (9')-> 4th hydraulic supply line ( 26 ')-> 2nd manual override valve (8')-> oil return line (24)-> oil tank (5) while rotating the hydraulic motor (7 ') for hoisting winch To drive the hoisting winch (1 '), wherein a portion of the oil passing through the third hydraulic supply line (25') passes through the third branch line (28 ')-> second shuttle valve (12') > 2nd brake release hydraulic supply line (32 ')-> 3 brake cylinders are supplied in order to release the third brake 10 '.

On the other hand, when the hoisting wire is wound by the hoisting winch 1 ', when the electric motor 20 drives the hydraulic pump 6 by the control device 19, the oil is oil tank (5)-> oil. Supply line 21-> 2nd manual override valve 8 '-> 4th hydraulic supply line 26'-> 2nd counter balance valve 9 '-> 4th hydraulic supply line ( 26 ')-> Hydraulic motor for hoisting winch (7')-> 3rd hydraulic supply line (25 ')-> 2nd manual override valve (8')-> Oil return line (24)- The hoisting winch 1 'is driven by rotating the hydraulic motor 7' for the hoisting winch while circulating in the order of the oil tank 5 and passing through the fourth hydraulic supply line 26 '. Part of the oil is supplied in the order of the fourth branch line 29 '-> the second shuttle valve 12'-> the second brake release hydraulic supply line 32 '-> the third brake cylinder The brake 10 'is released.

When the hoisting winch 1 'is not operated, the oil supplied to the third brake cylinder is cut off, and the third brake 10' is braked.

In addition, the personnel conveying system according to the present invention is the first brake release hydraulic supply line 32 is branched and connected to the first and second brake cylinder, each branched first brake release hydraulic supply line 32 It is characterized in that the first and second ball valves (14, 15) are provided, the top of the first and second brakes (10, 11) through the first and second ball valves (14, 15) The operation will be checked.

A method of inspecting the first and second brakes 10 and 11 through the first and second ball valves 14 and 15 will be described later.

In addition, the personnel transfer system according to the present invention is provided with emergency operation means for the case that the personnel transfer winch (1) is not operated because the power is cut off the vessel, the emergency operation means is the oil tank (5) 1 consists of an emergency hydraulic supply line 35 connecting the hydraulic supply line 25 and a manual operation pump 36 provided on the emergency hydraulic supply line 35.

When the power is cut off and the electric motor 20 cannot be operated and the transfer basket (Personnel basket) accommodating personnel is separated from the ground or the ship into the air and the evacuation of personnel is difficult, the manual pump 36 is operated. Oil tank (5)-> emergency hydraulic supply line (35)-> first hydraulic supply line (25)-> hydraulic motor for personnel transfer winch (7)-> second hydraulic supply line (26) -> 1st counter balance valve (9)-> 2nd hydraulic supply line (26)-> 1st manual override valve (8)-> oil return line (24)-> oil tank (5) By rotating the hydraulic motor for personnel transfer winch (7) while circulating in the order of driving the personnel transfer winch (1), at this time, a portion of the oil passing through the first hydraulic supply line 25 is the first branch line (28) )-> First shuttle valve 12-> first braking release hydraulic supply line 32-> first and second brake cylinders A microphone (10, 11) to thereby release.

In addition, the personnel transport system according to the present invention is coupled to the oil return line 24 and the oil supply line 21 for recovering oil to the oil tank 5, the other side and the roughing cylinder (2) Roughing with a third manually operated valve 16 coupled to the fifth and sixth hydraulic supply lines 37, 38 to be connected to selectively supply hydraulic pressure to the fifth and sixth hydraulic supply lines 37, 38. The cylinder 2 is operated.

In addition, the personnel transport system according to the present invention is a slewing winch hydraulic motor 17 for rotating the slewing winch (3), one side oil recovery line 24 for recovering oil to the oil tank (5) And the seventh and eighth hydraulic supply lines 41 and 42 coupled to the oil supply line 21 and the other side connected to the seventh and eighth hydraulic supply lines 41 and 42 connected to the hydraulic motor 17 for the slewing winch. A fourth manual control valve 18 is provided to selectively supply hydraulic pressure to the lines 41 and 42 to operate the slewing winch 3.

Here, the second to fourth manual operation valves 8 ', 16 and 18 have the same structure as the first manual operation valve 8 and are preferably installed adjacent to each other.

In addition, the personnel conveying system according to the present invention prevents lever interference to prevent interference between the actuating levers 4 between the actuating levers 4 for actuating the first and second manual override valves 8, 8 ′. The apparatus 50 is further provided.

As shown in FIG. 4, the lever interference preventing device 50 is mounted on the base bracket 51 and the base bracket 51 which are fixedly installed in the longitudinal direction between the operation levers 4, and in the horizontal direction. The sliding bracket 52 includes a sliding bracket 52 which is slidably movable and has grooves 53 into which the operating levers 4 are inserted at both sides thereof. It is preferably configured to be inserted into the groove 53 of the bracket 52 so that manipulation is impossible.

Hereinafter, the braking performance test method of the personnel transfer system for inspecting the first and second brakes 10 and 11 through the first and second ball valves 14 and 15 will be described in detail.

The braking performance test method of the personnel transfer system according to the present invention is the step of opening both the first and second ball valves (14, 15), giving a test load load to the crane hook 23 and spaced a certain distance upward from the deck Step of positioning, by operating the first manual control valve (8) to drive the personnel transfer winch (1) of the ball valve of any one of the first and second ball valves (14, 15), that is, the ball valve to be inspected Closing step, checking braking capacity, and opening the closed ball valve, followed by the same process for the other ball valve in the same manner. Will perform.

1: Personnel Transfer Winch 1 ': Hoisting Winch
2: roughing cylinder 3: slewing winch
4: operating lever 5: oil tank
6: hydraulic pump 7: hydraulic motor for personnel transfer winch
7 ': hydraulic motor for hoisting winch 8: 1st manual override valve
8 ': 2nd manual override valve 9: 1st counter balance valve
9 ': second counter balance valve 10: first brake
11: second brake 10 ': third brake
12: first shuttle valve 12 ': second shuttle valve
14: first ball valve 15: second ball valve
16: 3rd manual operation valve
17: hydraulic motor for slewing winch 18: fourth manual operation valve
19: controller 20: electric motor
21: Oil supply line 22: Personnel feed winch rotary shaft
22 ': hoisting winch pivot 23, 23': hook
24: oil return line 25: first hydraulic supply line
25 ': 3rd hydraulic supply line 26: 2nd hydraulic supply line
26 ': 4th hydraulic supply line 27: personnel conveying winch drum
27 ': hoisting winch drum 28: first branch line
28 ': third branch line 29: second branch line
29 ': fourth branch line 32: first braking release hydraulic supply line
32 ': 2nd brake release hydraulic supply line 35: emergency hydraulic supply line
36: manual operation pump 37: fifth hydraulic supply line
38: sixth hydraulic supply line 41: seventh hydraulic supply line
42: eighth hydraulic supply line 43: filtration filter
F: filter

Claims (8)

delete In the personnel transfer system using a crane,
Oil pump, hydraulic pump driven by electric motor to pump oil through oil supply line,
Hydraulic motor for personnel transfer winch, combined with personnel transfer winch rotary shaft to rotate personnel transfer winch,
One side is coupled to the oil recovery line and the oil supply line for recovering oil to the oil tank, the other side is coupled to the first and second hydraulic supply lines connected to the hydraulic motor for the personnel transfer winch first and second A first manually operated valve for selectively supplying hydraulic pressure to the hydraulic supply line,
A first counter balance valve installed in the second hydraulic supply line to form back pressure,
First and second brakes coupled to the human feed winch rotating shaft to brake rotation of the human feed winch rotating shaft;
Both inlets are connected to the first branch line of the first hydraulic supply line and the second branch line of the second hydraulic supply line, respectively, and the outlet to the first brake release hydraulic supply line to supply hydraulic pressure to the first and second brake cylinders. It characterized in that it comprises a first shuttle valve connected
Personnel transfer system
The method according to claim 2,
Hoisting winch,
Hydraulic motor for hoisting winch, combined with hoisting winch rotary shaft to rotate the personnel transfer winch,
One side is combined with an oil recovery line and the oil supply line for recovering oil to the oil tank, and the other side is combined with third and fourth hydraulic supply lines connected with the hydraulic motor for the hoisting winch to form a third and fourth. A second manual valve for selectively supplying hydraulic pressure to the hydraulic supply line,
A second counter balance valve installed in a fourth hydraulic supply line to form back pressure,
A third brake coupled to the hoisting winch rotary shaft to brake rotation of the hoisting winch rotary shaft;
A second inlet connected to a third branch line of the third hydraulic supply line and a fourth branch line of the fourth hydraulic supply line, respectively, and an outlet connected to a second brake release hydraulic supply line supplying hydraulic pressure to the third brake cylinder; Characterized in that it further comprises a shuttle valve
Personnel transfer system
The method according to claim 2,
The first brake release hydraulic supply line is branched to be connected to the first and second brake cylinders, characterized in that the first and second ball valves are provided on each branched first brake release hydraulic supply line is provided.
Personnel transfer system
The method according to claim 2,
An emergency hydraulic supply line connecting the oil tank and the first hydraulic supply line;
And further comprising a manual operation pump provided on the emergency hydraulic supply line.
Personnel transfer system
The method according to claim 2,
Roughing cylinder,
One side is combined with an oil return line and the oil supply line for recovering oil to the oil tank, and the other side is combined with fifth and sixth hydraulic supply lines connected with the roughing cylinder to the fifth and sixth hydraulic supply lines. A third manually operated valve for selectively supplying hydraulic pressure,
Slewing winch,
Hydraulic motor for slewing winch to rotate the slewing winch and
One side is combined with an oil return line and the oil supply line for recovering oil to the oil tank, and the other side is combined with a seventh and eighth hydraulic supply lines connected with the hydraulic motor for the slewing winch, and the seventh and eighth And a fourth manual control valve for selectively supplying hydraulic pressure to the hydraulic supply line.
Personnel transfer system
Claim 3
A lever interference prevention device for preventing interference between the actuation levers is further provided between the actuation levers for operating the first and second manual override valves.
Personnel transfer system
In the braking performance test method of the personnel transport system of claim 4,
Opening both the first and second ball valves,
Applying a test load load to the crane hook and positioning it spaced apart a certain distance from the top,
Closing the ball valve of any one of the first and second ball valves while operating the personnel transfer winch by operating the first manually operated valve;
Checking braking performance and
Opening the closed ball valve
How to test braking performance of personnel transfer system

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