KR102818830B1 - System to retrieve fire hose - Google Patents

Abstract

The present invention relates to a fire hose recovery system. A hose guide is mounted on either the left or right front side of a fire truck to guide a fire hose while passing through it. A recovery device comprises a device supporter mounted on the front of a storage box on the top of a fire truck, a guide roller unit mounted on the device supporter to guide a fire hose passing through the hose guide, a conveyor mounted on the device supporter to receive a fire hose passing through the guide roller unit to the upstream side, transport it to a storage box, and discharge it, and a tensioner mounted on the top of the conveyor to adjust the tension of the fire hose transported to the upstream side of the conveyor. A control unit controls the conveyor to adjust the transport speed of the fire hose according to the driving speed of the fire truck.

Description

{System to retrieve fire hose}

The present invention relates to a fire hose recovery system, and more particularly, to a system for recovering a fire hose that has been taken out from a storage compartment of a fire truck and used for fire suppression into the storage compartment of the fire truck.

In situations where fires occur in places where fire trucks cannot enter due to narrow and complicated alleys and road conditions caused by parking, or where fires occur in high places such as high-rise buildings, or where fires occur in facilities such as hazardous materials factories or chemical plants, fire trucks cannot be placed close to the fire scene, so a considerably long fire hose is required. In these cases, fire hoses are used in a form where unit hoses of a certain length are connected to each other by couplers and extended.

These fire hoses are used to be extended to a considerable length for fire suppression, so manually collecting the fire hoses and storing them in the fire truck for cleaning up the scene after use not only takes a long time, but can also be very inconvenient. In addition, since the couplers connecting the unit hoses of the fire hoses are thicker and protrude than the unit hoses, it is difficult to collect them all at once using existing devices that collect them by winding the unit hoses.

Patent Registration No. 10-1936407 (January 8, 2019, Announcement)

The object of the present invention is to provide a fire hose recovery system that can quickly and conveniently perform the recovery work of a fire hose and can recover fire hoses in batches without interference.

In order to achieve the above object, a fire hose recovery system according to the present invention includes a hose guide, a recovery device, and a control unit. The hose guide is mounted on either the front left or right side of a fire truck to guide a fire hose while passing through it. The recovery device includes a device supporter mounted on the front of a storage box on the top of a fire truck, a guide roller unit mounted on the device supporter to guide a fire hose passing through the hose guide, a conveyor mounted on the device supporter to receive the fire hose passing through the guide roller unit to the upstream side, transport it to the storage box, and discharge it, and a tensioner mounted on the top of the conveyor to adjust the tension of the fire hose transported to the upstream side of the conveyor. The control unit controls the conveyor to adjust the transport speed of the fire hose according to the driving speed of the fire truck.

According to the fire hose recovery system of the present invention, the fire hose can be recovered at a transport speed that matches the driving speed of the fire truck after being used by being extended to a considerable length for fire suppression, so that the recovery work can be performed quickly and conveniently.

In addition, according to the fire hose recovery system of the present invention, fire hoses can be recovered in batches without interference with the recovery device even if the couplers connecting the unit hoses are in a shape that protrudes thicker than the unit hoses.

FIG. 1 is a perspective view showing an example of a fire hose recovery system according to one embodiment of the present invention being applied to a fire truck.
FIG. 2 is a control block diagram for the fire hose recovery system in FIG. 1.
Figure 3 is a perspective view of the recovery device in Figure 1.
Figure 4 is a perspective view of the recovery device illustrated in Figure 3 viewed from the rear.
Figure 5 is a side view of Figure 3.
Figure 6 is a side view for explaining an example of the operation of the recovery device in Figure 5.

The present invention will be described in detail with reference to the attached drawings as follows. Here, the same reference numerals are used for the same components, and repetitive descriptions and detailed descriptions of well-known functions and components that may unnecessarily obscure the gist of the present invention are omitted.

The embodiments of the present invention are provided to more completely explain the present invention to those with average knowledge in the art. Accordingly, the shapes and sizes of elements in the drawings may be exaggerated for a clearer explanation.

FIG. 1 is a perspective view showing an example of a fire hose recovery system according to an embodiment of the present invention applied to a fire truck. FIG. 2 is a control block diagram for the fire hose recovery system in FIG. 1. FIG. 3 is a perspective view of a recovery device in FIG. 1. FIG. 4 is a perspective view of the recovery device shown in FIG. 3 as viewed from the rear. FIG. 5 is a side view of FIG. 3. FIG. 6 is a side view for explaining an example of the operation of the recovery device in FIG. 5.

Referring to FIGS. 1 to 6, a fire hose recovery system according to one embodiment of the present invention recovers a fire hose (20) that has been taken out from a storage box (11) of a fire truck (10) for fire suppression and used, into the storage box (11) of the fire truck (10) in accordance with the movement of the fire truck (10), and includes a hose guide (100), a recovery device (200), and a control unit (300). Here, the fire hose (20) may be formed in a long form in which unit hoses of a certain length are connected to each other by couplers.

The hose guide (100) is mounted on either the front left or right side of the fire truck (10) and guides the fire hose (20) as it passes through it. The hose guide (100) can be mounted next to the bottom of the cabin of the fire truck (10). The hose guide (100) can guide the fire hose (20) as it passes through it in the forward and backward directions through the central hole.

The recovery device (200) is equipped with a device support (210), a guide roller unit (220), a conveyor (230), and a tensioner (240). The device support (210) is mounted in front of the storage box (11) on the top of the fire truck (10). The device support (210) is configured to be able to mount the guide roller unit (220) and the conveyor (230).

The guide roller unit (220) is mounted on the device support (210) to guide the fire hose (20) passing through the hose guide (100). For example, the guide roller unit (220) may include a pair of brushless rollers (221) and a brush roller (222).

A pair of brushless rollers (221) are arranged on the front left and right sides of the conveyor (230) and are supported rotatably about a vertical axis on the device support (210). The brushless rollers (221) guide a fire hose (20) while passing it through the spaced gaps between them. The brushless rollers (221) are formed in a form in which there are no brushes on the roller's rolling surface.

The brush roller (222) is arranged at the lower front side of the conveyor (230) and is supported rotatably around an axis parallel to the left and right directions on the device support (210). The brush roller (222) is formed in a form in which a brush is attached to the rolling surface of the roller. When the fire hose (20) is transported upward, the brush roller (222) can smoothly guide the coupler of the fire hose (20) by being deformed by the coupler of the fire hose (20).

The conveyor (230) is mounted on a device support (210) to receive a fire hose (20) that has passed through a guide roller unit (220) upstream and transport it to a storage box (11) for discharge. For example, the conveyor (230) may be configured to drive a conveyor belt by a hydraulic motor that receives hydraulic pressure from a hydraulic pump of a fire truck (10).

As another example, the conveyor (230) may be configured to drive the conveyor belt by an electric motor that is powered by electricity from the battery of the fire truck (10). The conveyor (230) is driven and controlled by the control unit (300).

A tensioner (240) is mounted on the upper part of the conveyor (230) to adjust the tension of a fire hose (20) transported upstream of the conveyor (230). For example, the tensioner (240) may include a pivot arm (241), a main brush roller (242), and a sub brush roller (243).

The pivot arm (241) is pivotally operated by being connected to the front upper side of the conveyor (230) with a hinge axis parallel to the left and right directions at the front portion. The pivot arm (241) may be formed of a pair of arm members (241a). The arm members (241a) are hinge-connected at the front portions to the front left and right sides of the conveyor (230). The arm members (241a) may be provided with a main brush roller (242) and a sub brush roller (243) spaced apart from each other.

The arm members (241a) can be connected to each other at the rear portions by a connecting member (241b). A handle (241c) can be attached to the connecting member (241b). The user can hold the handle (241c) as needed and pivot the pivot arm (241) upward to separate the main brush roller (242) from the conveyor (230).

The main brush roller (242) is supported so as to be rotatable around an axis parallel to the left and right directions at the rear of the pivot arm (241), and while passing the fire hose (20) between it and the conveyor (230), it presses the fire hose (20) with its own weight together with the pivot arm (241) to adjust the tension of the fire hose (20).

The main brush roller (242) is formed in a form in which a brush is attached to the roller's cloud surface. When the fire hose (20) passes between the main brush roller (242) and the conveyor (230), the main brush roller (242) presses the fire hose (20) by its own weight to discharge water inside the fire hose (20), and the brush is deformed by the coupler of the fire hose (20) so that the coupler can be smoothly passed.

That is, even if the coupler connecting the unit hoses is in a shape that protrudes thicker than the unit hoses, the fire hoses (20) can be collectively recovered without interference between the main brush roller (242) and the conveyor (230).

The sub brush roller (243) is positioned higher than the main brush roller (242) at the center of the pivot arm (241) and is supported so as to be rotatable around an axis parallel to the axis of the main brush roller (242) to guide the fire hose (20) into the space between the conveyor (230).

The sub brush roller (243) is formed in a form in which a brush is attached to the roller's cloud surface. The sub brush roller (243) is arranged at a wider distance from the conveyor (230) than the main brush roller (242), so that the fire hose (20) can be first aligned and then transferred between the main brush roller (242) and the conveyor (230). Accordingly, the fire hose (20) can be smoothly transferred between the main brush roller (242) and the conveyor (230).

The control unit (300) controls the conveyor to adjust the transport speed of the fire hose (20) according to the driving speed of the fire truck (10). The transport speed of the fire hose (20) refers to the travel speed of the fire hose (20) by the conveyor (230). The fire hose (20) can be used by being extended to a considerable length for fire suppression, and then recovered at a transport speed that is adjusted to the driving speed of the fire truck (10), so that the recovery operation can be performed quickly and conveniently.

The control unit (300) can compensate for the difference between the driving speed of the fire truck (10) and the transport speed of the fire hose (20) by increasing or decreasing the transport speed of the fire hose (20) when the driving speed of the fire truck (10) and the transport speed of the fire hose (20) are continuously different. The control unit (300) can receive the driving speed information of the fire truck (10) from the GPS (310) or the fire truck speedometer.

That is, when the driving speed of the fire truck (10) provided from GPS (310) or the fire truck (10) and the transport speed of the fire hose (20) provided from the encoder of the conveyor (230) are different, the control unit (300) can compensate for the difference between the driving speed of the fire truck (10) and the transport speed of the fire hose (20) by increasing or decreasing the transport speed of the fire hose (20).

When the conveyor (230) is configured to include a hydraulic motor driven according to the flow rate controlled by the proportional valve from the hydraulic pump of the fire truck (10), the control unit (300) can adjust the flow rate of the hydraulic motor by the proportional valve according to the driving speed of the fire truck (10) to match the transport speed of the fire hose (20) to the driving speed of the fire truck (10).

When the conveyor (230) is configured to include an electric motor, the control unit (300) can adjust the rotation speed of the electric motor according to the driving speed of the fire truck (10) to match the transport speed of the fire hose (20) to the driving speed of the fire truck (10). The control unit (300) can control the transport speed of the fire hose (20) by receiving the rotation speed of the hydraulic motor or electric motor from an encoder or the like.

The control unit (300) can control the recovery device (200) according to various commands such as an on/off command, a start command, an instantaneous acceleration command, etc., input by the user from the operation monitor (400). When the driving speed of the fire truck (10) and the transport speed of the fire hose (20) are different, the control unit (300) can display caution, warning, danger, etc. through the operation monitor (400) to inform the user. In addition, the control unit (300) can display information such as a work status, an emergency mode, etc. through the operation monitor (400).

The control unit (300) can determine danger, etc. and stop the recovery device (200) or switch it to a standby state. The control unit (300) can control the recovery device (200) regardless of the driving speed of the fire truck (10) according to a command input by the user from a remote control (500).

The fire hose recovery system may include a slip detector (600) that detects a slip phenomenon of a fire hose (20) being transported by a recovery device (200). When a slip phenomenon of the fire hose (20) occurs while the fire truck (10) is driving and the transport speed of the fire hose (20) is lower than the driving speed of the fire truck (10), a sagging phenomenon of the fire hose (20) may occur.

The slip detector (600) can detect a slip phenomenon of the fire hose (20) by detecting whether the fire hose (20) sags during the process of retrieving the fire hose (20) that has been spread lengthwise on the ground after use by the retrieval device (200) according to the driving of the fire truck (10). The slip detector (600) can detect a slip phenomenon of the fire hose (20) by detecting whether it passes through a set area between the hose guide (100) and the guide roller unit (220). The slip detector (600) can be configured to include an image sensor, etc.

The control unit (300) can control the conveyor (230) to be accelerated momentarily when a slip phenomenon of the fire hose (20) is detected based on information provided from the slip detector (600). When the control unit (300) determines that a slip phenomenon of the fire hose (20) has occurred, it can accelerate the conveyor (230) momentarily to eliminate the sagging phenomenon of the fire hose (20) and then transport the fire hose (20) at a normal speed. Meanwhile, a user can also eliminate the sagging phenomenon of the fire hose (20) by manually accelerating the conveyor (230) momentarily when he/she confirms the slip phenomenon of the fire hose (20).

The fire hose recovery system may include a foreign matter detector (700) that detects foreign matter attached to a fire hose (20) entering a recovery device (200), and an air injector (800) that removes foreign matter attached to the fire hose (20) with high-pressure air. The foreign matter detector (700) may be formed of an image sensor, etc. The control unit (300) may operate the air injector (800) to remove foreign matter from the fire hose (20) when foreign matter is detected in the fire hose (20) based on information provided from the foreign matter detector (700). Accordingly, the fire hose (20) may be stored in a storage box (11) of a fire truck (10) with the foreign matter removed.

In addition, if the fire hose (20) enters the recovery device (200) with foreign substances such as water or dirt attached to it, a slip phenomenon may occur. If the control unit (300) determines that the slip phenomenon of the fire hose (20) has occurred due to the foreign substances based on the information provided from the foreign substance detector (700), the control unit (300) operates the air injector (800) to remove the foreign substances from the fire hose (20), thereby relieving the slip phenomenon of the fire hose (20). Meanwhile, the user may also remove the foreign substances from the fire hose (20) by manually operating the air injector (800) if he/she confirms the slip phenomenon of the fire hose (20) due to the foreign substances.

In an additional aspect, the recovery device (200) can have its left-right angle adjusted by a rotation mechanism (250), its left-right position adjusted by a left-right movement mechanism (260), and its up-down height adjusted by a lifting mechanism (270).

The rotating mechanism (250) can adjust the left and right angle of the recovery device (200) by rotating the recovery device (200) around a vertical axis. For example, the rotating mechanism (250) may include a rotating shaft portion (251), a shaft support (252), and a rotating locking mechanism (253).

The rotating shaft (251) is fixed to the bottom of the device support (210). The shaft holder (252) supports the rotating shaft (251) by inserting it. The rotating shaft (251) can be rotatably supported by the shaft holder (252) via a bearing. The rotating locking mechanism (253) locks or unlocks the rotating shaft (251) to the shaft holder (252). For example, the rotating locking mechanism (253) may include locking grooves (254) and a locking plunger (255).

The locking grooves (254) can be arranged at regular intervals on the outer surface of the shaft support (252) according to the stepwise angle adjustment of the recovery device (200). The locking plunger (255) is mounted on the device support (210) and has its nose selectively fitted into the locking grooves (254) to secure the device support (210) to the shaft support (252).

The locking plunger (255) may be configured such that a knob is positioned outside the body, a nose extends from the knob and penetrates the body, and a spring is built into the body to apply elastic force in the direction of pulling the nose out of the body.

This locking plunger (255) operates so that the nose is pulled out by the spring within the body and waits, and when the user pulls the knob, the nose is pulled in, and when the user releases the knob, the nose returns to the pulled out state by the spring. Meanwhile, the rotating mechanism (250) may be driven by the control unit (300) including an actuator.

The left-right movement mechanism (260) can adjust the left-right position of the recovery device (200) by moving the rotation mechanism (250) in the left-right direction. For example, the left-right movement mechanism (260) can include a movable block (261), a fixed block (262), sliders (263), guide rails (264), and a left-right movement locking mechanism (265).

The movable block (261) is equipped with a bearing (252) on its upper surface. The fixed block (262) is arranged on the lower side of the movable block (261). The sliders (263) are fixed to the lower surface of the movable block (261). The guide rails (264) are fixed to the upper surface of the fixed block (262) and guide the left and right movement by inserting the sliders (263) respectively. The sliders (263) and the guide rails (264) can be composed of various known linear guides.

The left-right movement locking mechanism (265) locks or unlocks the movable block (261) to the fixed block (262). For example, the left-right movement locking mechanism (265) may include a pair of clamps (266), a clamp holder (267), a clamp screw (268), and a clamp lever (269).

A pair of clamps (266) are arranged with a guide rail (264) between them. A clamp holder (267) is mounted on a movable block (261) to support the clamps (266) so that they approach or are spaced apart from each other. A clamp screw (268) is rotatably supported by the clamp holder (267) and is coupled to the clamps (266) so as to bring the clamps (266) closer to or apart from each other depending on the rotational direction. A clamp lever (269) is fixed to the clamp screw (268) on the same axis.

This left-right movement locking mechanism (265) can be locked by the user manipulating the clamp lever (269) so that the clamps (266) come close to each other and press against the guide rail (264), or can be released by the clamps (266) moving away from each other and separating from the guide rail (264). Meanwhile, the left-right movement mechanism (260) can also be driven by the control unit (300) including an actuator.

The lifting mechanism (270) can adjust the height of the recovery device (200) by raising and lowering the left-right movement mechanism (260) with respect to the fire truck (10). In addition, the lifting mechanism (270) can raise and withdraw the recovery device (200) stored in the storage space on the upper side of the fire truck (10) to the outside, and lower and store the recovery device (200) that has been pulled out to the outside back into the storage space. Accordingly, the recovery device (200) can be stored in the fire truck (10) and then pulled out to the outside for use as needed. For example, the lifting mechanism (270) can include an elevating base (271), a first link member (272), a second link member (273), and an elevating actuator (274).

The lifting base (271) is positioned on the lower side of the fixed block (262) and fixed to the storage space of the fire truck (10). The first link (272) is hingedly connected at both ends to the fixed block (262) and the lifting base (271), and the lower end hinged to the lifting base (271) is formed so that it can slide along the inner side of the lifting base (271).

The second link member (273) is hinge-connected to the first link member (272) by crossing it, and both ends are hinge-connected to the fixed block (262) and the lifting base (271). The second link member (273) is hinge-connected so that it can rotate up and down while the lower end, which is hinge-connected to the lifting base (271), is fixed to the inner end of the lifting base (271). The first and second links (272, 273) can raise or lower the fixed block (262) relative to the lifting base (271) depending on the unfolding or folding operation.

The lifting actuator (274) lifts the fixed block (262) by pivoting the first link member (272) relative to the lifting base (271). As an example, the lifting actuator (274) may be formed of a hydraulic cylinder that operates by receiving hydraulic pressure from a hydraulic pump of the fire truck (10). As another example, the lifting actuator (274) may be formed of a linear motor that operates by receiving electricity from a battery of the fire truck (10).

In this way, according to the fire hose recovery system of the present embodiment, the fire hose (20) can be used by being extended to a considerable length for fire suppression, and then recovered at a transport speed that matches the driving speed of the fire truck (10), so that the recovery operation can be performed quickly and conveniently.

In addition, according to the fire hose recovery system of the present embodiment, the fire hoses (20) can be recovered in batches without interference with the recovery device (200), even if the couplers connecting the unit hoses are in a shape that protrudes thicker than the unit hoses.

Although the present invention has been described with reference to the embodiments illustrated in the attached drawings, this is merely exemplary, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Accordingly, the true scope of protection of the present invention should be determined only by the appended claims.

10..Fire truck 11..Storage box
20..Fire hose
100..Hose Guide 200..Recovery Device
210..Device support 220..Guide roller unit
221..Brushless roller 222..Brush roller
230..Conveyor 240..Tensioner
241..pivot arm 241a..arm absence
241b..Connecting member 241c..Handle
242..Main Brush Roller 243..Sub Brush Roller
250..Rotating mechanism 251..Rotating shaft
252..Axle holder 253..Rotation lock mechanism
254..Lock Home 255..Lock Plunger
260..Left-right movement mechanism 261..Moving block
262..Fixed Block 263..Slider
264.. Guide rail 265.. Left-right movement lock mechanism
266..Clamp 267..Clamp Holder
268..Clamp Screw 269..Clamp Lever
270.. Elevating mechanism 271.. Elevating base
272..1st link 273..2nd link
274..Lifting Actuator 300..Control Unit
310.,GPS 400..Operation Monitor
500..Remote control 600..Sleep detector
700..Foreign substance detector 800..Air injector

Claims (9)

A hose guide installed on either the front left or right side of a fire truck to guide the fire hose as it passes through it;
A recovery device comprising: a device supporter mounted on the front of a storage box on the top of a fire truck; a guide roller unit mounted on the device supporter to guide a fire hose passing through the hose guide; a conveyor mounted on the device supporter to receive the fire hose passing through the guide roller unit to the upstream side and transport it to the storage box for discharge; and a tensioner mounted on the top of the conveyor to adjust the tension of the fire hose transported to the upstream side of the conveyor;
A control unit that controls the conveyor to adjust the transport speed of the fire hose according to the driving speed of the fire truck;
A rotating mechanism for adjusting the left and right angle of the recovery device by rotating the recovery device around a vertical axis;
A left-right moving mechanism for adjusting the left-right position of the recovery device by moving the above rotating mechanism in the left-right direction; and
A lifting mechanism for adjusting the height of the recovery device by lifting and lowering the left-right moving mechanism relative to the fire truck;
The above-mentioned rotating mechanism includes a rotating shaft portion fixed to the lower end of the device support, a bearing for supporting the rotating shaft portion by inserting the rotating shaft portion into it, and a rotating locking mechanism for locking or releasing the rotating shaft portion to the bearing;
The above-described left-right movement mechanism includes a movable block having the above-described bearing mounted on the upper surface, a fixed block arranged on the lower side of the movable block, sliders fixed to the lower surface of the movable block, guide rails that respectively fit the sliders while being fixed to the upper surface of the fixed block to guide left-right movement, and a left-right movement locking mechanism that locks or unlocks the movable block to the fixed block;
A fire hose recovery system, characterized in that the above-mentioned lifting mechanism includes an lifting base that is arranged on the lower side of the fixed block and fixed to a fire truck, a first link member whose both ends are hingedly connected to the fixed block and the lifting base and whose lower end is hingedly connected to the lifting base is formed to be able to slide along the inner side of the lifting base, a second link member that is hingedly connected to the first link member and whose both ends are hingedly connected to the fixed block and the lifting base, and an lifting actuator that lifts the fixed block by pivoting the first link member with respect to the lifting base.
In the first paragraph, the tensioner,
A pivot arm having a front portion and a pivot axis that is connected to the front upper side of the conveyor in a left-right direction and is pivotally operated,
A main brush roller that is supported so as to be rotatable around an axis parallel to the left and right directions at the rear portion of the pivot arm, and passes the fire hose between the conveyor and presses the fire hose with its own weight together with the pivot arm to adjust the tension of the fire hose, and
A fire hose recovery system characterized by including a sub brush roller, which is positioned higher than the main brush roller at the center of the pivot arm and is supported so as to be rotatable around an axis parallel to the axis of the main brush roller, thereby guiding the entry of the fire hose between the conveyor and the sub brush roller.
delete delete In the first paragraph, the conveyor,
A fire hose recovery system characterized in that it is configured to drive a conveyor belt by a hydraulic motor driven by receiving hydraulic pressure from a hydraulic pump of a fire truck, or to drive a conveyor belt by an electric motor driven by receiving electricity from a battery of the fire truck.
In the first paragraph, the guide roller unit,
A pair of brushless rollers arranged on the front left and right sides of the conveyor and supported rotatably about a vertical axis on the device support, and
A fire hose recovery system characterized by including a brush roller that is arranged at the front lower side of the conveyor and is rotatably supported around an axis parallel to the left and right directions on the device support.
In the first paragraph,
It includes a slip detector for detecting a slip phenomenon of a fire hose transported by the above recovery device;
A fire hose recovery system characterized in that the control unit controls the conveyor to momentarily accelerate when a slip phenomenon of the fire hose is detected based on information provided from the slip detector.
In the first paragraph,
It includes a foreign substance detector that detects foreign substances attached to a fire hose entering the above recovery device, and an air sprayer that removes foreign substances attached to the fire hose with high-pressure air;
A fire hose recovery system characterized in that the control unit operates the air jet to remove foreign matter from the fire hose when foreign matter is detected in the fire hose based on information provided from the foreign matter detector.
In the first paragraph, the control unit,
A fire hose recovery system characterized in that the difference between the fire truck's driving speed and the fire hose's transport speed can be compensated for by increasing or decreasing the fire hose's transport speed when the fire truck's driving speed provided from a GPS or fire truck and the fire hose's transport speed provided from an encoder of a conveyor are different.

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