阅读说明：本技术 一种双驱动管刷清洁系统 (Dual-drive pipe brush cleaning system ) 是由 刘鑫 邓宇 周振华 胡林 于 2021-07-26 设计创作，主要内容包括：本发明公开了一种双驱动管刷清洁系统,该系统由多个单套管刷清洁装置组成；单套管刷清洁装置包括电机驱动模块、清洁模块、伞状驱动模块与控制模块；电机驱动模块与伞状驱动模块用于驱动管刷在换热管内做往复运动；控制模块由安装于管刷清洁装置内的传感器与位于暖通系统控制柜内的处理器组成,用于主动控制清洁装置的运行停止；本发明通过主动与被动相结合的驱动方式,不但消除了传统管刷清洁系统存在的管刷卡在换热管内部的隐患,还能在整个暖通系统正常运行的情况下完成清洗工作；同时可由传感器提供的数据对换热器的工作状况进行分析,既能提高管刷清洁系统的工作效率又能为换热器设计维护等方面的工作提供数据支持。(The invention discloses a dual-drive pipe brush cleaning system, which consists of a plurality of single-sleeve pipe brush cleaning devices; the single casing brush cleaning device comprises a motor driving module, a cleaning module, an umbrella-shaped driving module and a control module; the motor driving module and the umbrella-shaped driving module are used for driving the tube brush to do reciprocating motion in the heat exchange tube; the control module consists of a sensor arranged in the pipe brush cleaning device and a processor positioned in a heating and ventilation system control cabinet and is used for actively controlling the cleaning device to stop running; the invention not only eliminates the hidden trouble that the tube brush is blocked in the heat exchange tube in the traditional tube brush cleaning system by a driving mode of combining the driving mode and the driven mode, but also can complete the cleaning work under the condition that the whole heating and ventilation system normally operates; meanwhile, the working condition of the heat exchanger can be analyzed by data provided by the sensor, so that the working efficiency of the pipe brush cleaning system can be improved, and data support can be provided for the work in the aspects of design and maintenance of the heat exchanger and the like.)

1. The utility model provides a dual drive tube brush cleaning system comprises a plurality of single sleeve brush cleaning device, its characterized in that: the single-casing brush cleaning device consists of a motor driving module, a cleaning module, an umbrella-shaped driving module and a control module;

the motor driving module consists of a micro motor, a motor shell and a recovery rope, wherein the micro motor is arranged on the outer side of the tube plate at the water inlet end of the heat exchange tube and is connected with the umbrella-shaped folding mechanism through the recovery rope; the miniature motor enables the umbrella-shaped unfolding and folding mechanism to drive the pipe brush to do circular reciprocating motion in the heat exchange pipe by retracting the recovery rope, so that the cleaning work is finished; the motor shell is arranged outside the micro motor to protect the micro motor from being influenced by water flow;

the cleaning module consists of a recovery end brush basket, a capture end brush basket and a tube brush, wherein the recovery end brush basket and the capture end brush basket are respectively arranged on the outer sides of a water inlet end tube plate and a water outlet end tube plate of the heat exchange tube and are used for receiving and fixing the tube brush; the pipe brush is sleeved on the main shaft of the umbrella-shaped unfolding and folding mechanism, and soft and hard staggered bristles are arranged on the outer side of the pipe brush; the pipe brush circularly reciprocates in the heat exchange pipe by means of power provided by the motor driving module and the umbrella-shaped driving module to clean the inner wall of the heat exchange pipe;

the umbrella-shaped driving module consists of an umbrella-shaped unfolding and folding mechanism; the umbrella-shaped unfolding and folding mechanism is provided with an electric lifting switch and a spring, the electric lifting switch controls the electric lifting switch to ascend and descend according to a signal sent by the control module, and the spring is matched to control the opening and closing of the umbrella cover of the umbrella-shaped unfolding and folding mechanism;

the control module consists of sensor components such as a distance sensor and a temperature sensor and a processor positioned in a heating and ventilation system control cabinet, wherein the distance sensor components are arranged on the tube brush and the brush basket at the recovery end, and feed back the position information of the umbrella-shaped unfolding and folding mechanism and the tube brush to the processor; the temperature sensor assembly is arranged on the pipe brush, collects relevant information in the heat exchanger and sends the information to the processor, and data support is provided for self optimization of a cleaning system operation scheme; the processor receives signals fed back by the distance sensor, and controls the opening and closing of the umbrella cover of the umbrella-shaped unfolding and folding mechanism and the running and stopping of the micro motor according to different positions of the umbrella-shaped unfolding and folding mechanism, so that the pipe brush cleaning device is controlled to complete a normal working process.

2. The dual drive tube brush cleaning system according to claim 1, wherein: the outer circle radius of the umbrella cover of the umbrella-shaped unfolding and folding mechanism after the umbrella cover is unfolded is 80% -90% of the radius of the inner wall of the heat exchange tube.

3. The dual drive tube brush cleaning system according to claim 1, wherein: the pipe brush is a movable nylon brush, and the bristles on the outer side are formed by soft bristles parallel to the brush basket framework and hard bristles parallel to the gap of the brush basket framework in an alternating mode.

4. The dual drive tube brush cleaning system according to claim 1, wherein: umbrella form exhibition closes mechanism when the pipe brush need follow the heat exchange tube end of intaking toward the end direction of water outlet motion, umbrella form exhibition umbrella face that closes the mechanism opens, umbrella form exhibition closes the mechanism and drives the pipe brush under the promotion of rivers and from the heat exchange tube end of intaking toward the end direction of water outlet motion, washs the heat exchange tube inner wall.

5. The dual drive tube brush cleaning system according to claim 1, wherein: before the umbrella-shaped unfolding and folding mechanism enters the capturing end brush basket, the umbrella cover of the umbrella-shaped unfolding and folding mechanism is turned to be closed from an open state, so that the umbrella-shaped unfolding and folding mechanism and the pipe brush can conveniently enter the capturing end brush basket.

6. The dual drive tube brush cleaning system according to claim 1, wherein: the umbrella-shaped unfolding and folding mechanism is characterized in that the umbrella cover of the umbrella-shaped unfolding and folding mechanism is always kept in a closed state in the process that the pipe brush moves from the water outlet end to the water inlet end of the heat exchange pipe.

7. A dual drive tube brush cleaning system according to claim 1 or 6, wherein: when the tube brush needs to move from the water outlet end to the water inlet end of the heat exchange tube, the micro motor continuously operates, and the umbrella-shaped driving module and the tube brush are pulled to return to the recovery end brush basket through the recovery rope.

8. A dual drive tube brush cleaning system according to claim 1 or 6, wherein: when the motor driving module clamps the pipe brush in the heat exchange pipe, the motor driving module receives a signal sent by the control module to start the micro motor, and the pipe brush is actively recovered.

Technical Field

The invention relates to the field of cleaning in a heat exchange tube, in particular to a dual-drive tube brush cleaning system.

Background

The application of the heat exchange tube is more and more extensive nowadays, especially in the heating ventilation air conditioning field. However, with the technical progress, the design of the heat exchanger is more and more diversified, the number of the heat exchange tubes in the heat exchanger is more and more, and the arrangement mode is more and more complicated, so that the requirement for efficiently cleaning the inner walls of a large number of heat exchange tubes is increasingly increased.

The cleaning method of the inner wall of the heat exchange tube used at present mainly comprises three types: (1) manual cleaning, in which tools such as a slender rod and a brush are used manually to clean one by one or a chemical agent is used to clean the whole body, but the cleaning mode not only needs to close the heating and ventilation system, but also needs to detach the end cover of the water chamber, so that the cleaning efficiency is low, a large amount of manpower and material resources are consumed, and the inner wall of the heat exchange tube is possibly damaged; (2) the method comprises the following steps of cleaning rubber balls, namely installing ball serving devices and recoverers on two sides of a heat exchanger, and driving balls to move in heat exchange tubes by utilizing water flow to achieve the purpose of cleaning, but the cleaning mode has the problems that the heat exchange tubes are blocked by the balls, the balls are difficult to recover and the like, and the cleaning efficiency of the heat exchange tubes cannot be ensured because the balls enter each heat exchange tube; (3) the cleaning method comprises the following steps that (1) pipe brushes are cleaned, a four-way reversing valve is arranged on the outer side of a water pipe of a heat exchanger, two brush baskets and one pipe brush are arranged on two sides of each heat exchange pipe, and the direction of water flow is changed by the four-way reversing valve, so that the pipe brushes can be pushed by the water flow to reciprocate in the heat exchange pipes, and the cleaning purpose is achieved; the pipe brush cleaning system does not need to be disassembled during working, and the brush basket and the pipe brush which are arranged on each heat exchange pipe ensure cleaning efficiency and are convenient to recover.

However, in the actual cleaning process of the tube brush type heat exchange tube cleaning system, the existing tube brush type cleaning system has the following problems:

1. the existing tube brush cleaning system enables water flow to reversely flow through a four-way reversing valve, so that a brush body can do reciprocating motion in a heat exchange tube. For example, a patent with publication number CN110657702A entitled "a brush type on-line cleaning system device". However, when the four-way reversing valve works, water flow which should flow out of the water chamber and flow to the terminal equipment is reversely flowed back to the interior of the heat exchanger, the water flow of a terminal system cannot be supplemented, the operation will be stopped, the working efficiency of the heating and ventilation system can be reduced, and periodic impact vibration can be caused to the heat exchanger by high-pressure water flow which repeatedly and instantly changes the flow direction, so that the stability of the whole structure of the heat exchanger can be influenced.

2. The tube brush of the existing tube brush cleaning system is completely pushed by water flow, so that the hidden danger that the tube brush is clamped in a brush basket or in a heat exchange tube exists when the water pressure is insufficient; especially, the heat exchanger design that adopts hydroecium side low pressure is more and more at present, and the rivers of low pressure will lead to the probability greatly increased of tube brush card in the heat transfer pipe, in case this kind of condition takes place, then need shut down the heat exchanger, unpack apart the hydroecium and take out the tube brush by the manual work, very inconvenient.

3. The cleaning system of the existing pipe brush is used for cleaning the inside of a completely closed heat exchanger at regular time, the working condition of the heat exchanger can not be known in real time in the outer side, and the pipe brush can not be fed back when being clamped in the heat exchange pipe, and can only be found when the pipe brush is replaced by disassembling the machine at regular intervals.

Disclosure of Invention

To overcome the above problems, the present invention provides a dual drive tube brush cleaning system that simultaneously solves many of the above problems.

The technical scheme adopted by the invention for solving the technical problems is as follows: a dual-drive pipe brush cleaning system is composed of a plurality of single-sleeve pipe brush cleaning devices; the single-casing brush cleaning device consists of a motor driving module, a cleaning module, an umbrella-shaped driving module and a control module; the motor driving module consists of a micro motor, a motor shell and a recovery rope; the micro motor is arranged on the outer side of the tube plate at the water inlet end of the heat exchange tube and is connected with the umbrella-shaped unfolding and folding mechanism through a recovery rope; the miniature motor enables the umbrella-shaped unfolding and folding mechanism to drive the pipe brush to do circular reciprocating motion in the heat exchange pipe by retracting the recovery rope, so that the cleaning work is finished; the motor shell is arranged outside the micro motor to protect the micro motor from being influenced by water flow;

the cleaning module consists of a recovery end brush basket, a capture end brush basket and a pipe brush; the recovery end brush basket and the capture end brush basket are respectively arranged on the outer side of the water inlet end tube plate and the outer side of the water outlet end tube plate of the heat exchange tube and are used for receiving and fixing the tube brushes; the pipe brush is sleeved on the main shaft of the umbrella-shaped unfolding and folding mechanism, and soft and hard staggered bristles are arranged on the outer side of the pipe brush; the pipe brush circularly reciprocates in the heat exchange pipe by means of power provided by the motor driving module and the umbrella-shaped driving module to clean the inner wall of the heat exchange pipe;

the umbrella-shaped driving module consists of an umbrella-shaped unfolding and folding mechanism; the umbrella-shaped unfolding and folding mechanism is provided with an electric lifting switch and a spring, the electric lifting switch controls the electric lifting switch to ascend and descend according to a signal sent by the control module, and the spring is matched to control the opening and closing of the umbrella cover of the umbrella-shaped unfolding and folding mechanism;

the control module consists of sensor components such as a distance sensor and a temperature sensor and a processor positioned in a heating and ventilation system control cabinet; the distance sensor assembly is arranged on the tube brush and the brush basket at the recovery end, and feeds back the position information of the umbrella-shaped unfolding and folding mechanism and the tube brush to the processor; the temperature sensor assembly is arranged on the pipe brush, collects relevant information in the heat exchange pipe and sends the information to the processor, and data support is provided for self optimization of a cleaning system operation scheme; the processor receives signals fed back by the distance sensor, and controls the opening and closing of the umbrella cover of the umbrella-shaped unfolding and folding mechanism and the running and stopping of the micro motor according to the different positions of the umbrella-shaped unfolding and folding mechanism, so that the pipe brush cleaning device is controlled to complete a normal working process.

Preferably, the outer circle radius of the umbrella cover of the umbrella-shaped unfolding and folding mechanism after the umbrella cover is unfolded is 80% -90% of the radius of the inner wall of the heat exchange tube.

Preferably, the tube brush is a movable nylon brush, and the bristles on the outer side are formed by alternately arranging soft bristles parallel to the brush basket framework and hard bristles parallel to the gap of the brush basket framework.

Preferably, when the pipe brush needs to move from the water inlet end of the heat exchange pipe to the water outlet end of the heat exchange pipe, the umbrella cover of the umbrella-shaped unfolding and folding mechanism is unfolded, and the umbrella-shaped unfolding and folding mechanism drives the pipe brush to move from the water inlet end of the heat exchange pipe to the water outlet end of the heat exchange pipe under the pushing of water flow, so that the inner wall of the heat exchange pipe is cleaned.

Preferably, before the umbrella-shaped unfolding and folding mechanism enters the catching end brush basket, the umbrella cover of the umbrella-shaped unfolding and folding mechanism is turned from unfolding to closing, so that the umbrella-shaped unfolding and folding mechanism and the pipe brush can conveniently enter the catching end brush basket.

Preferably, the umbrella-shaped unfolding and folding mechanism is in a closed state all the time when the pipe brush moves from the water outlet end of the heat exchange pipe to the water inlet end of the heat exchange pipe.

Preferably, when the pipe brush needs to move from the water outlet end to the water inlet end of the heat exchange pipe, the micro motor continuously operates, and the pipe brush and the umbrella-shaped unfolding and folding mechanism are drawn to return to the recovery end brush basket by the recovery rope.

Preferably, when the motor driving module clamps the tube brush inside the heat exchange tube, the motor driving module receives a signal sent by the control module to start the micro motor, and actively finishes the tube brush recovery work.

The invention has the beneficial effects that:

1. aiming at the point 1 provided by the background technology, the invention adopts the mode that the motor driving module is arranged outside the recovery end brush basket to replace a four-way reversing valve to solve the problem. When the pipe brush moves from the water inlet end of the heat exchange pipe to the water outlet end along the water flow direction, the umbrella cover of the umbrella-shaped unfolding and folding mechanism is opened, and the water flow pushes the umbrella cover to drive the pipe brush to move forwards; when the pipe brush moves against the water flow, the umbrella cover of the umbrella-shaped unfolding and folding mechanism is folded, the motor driving module is started, traction force is provided by the motor driving module, and the pipe brush is pulled to move against the water flow. Therefore, the direction of water flow in the heat exchange tube does not need to be changed in the cleaning process, the tube brush can also reciprocate in the heat exchange tube, and the stability of the heat exchanger structure and the normal work of the whole heating and ventilation system including the terminal equipment are not influenced completely.

2. In view of the point 2 proposed in the background art, the present invention solves this problem by adopting a driving manner in which active driving and passive driving are combined. Umbrella form drive module relies on the promotion of rivers to drive the motion of tube brush towards heat exchange tube water outlet end direction, and motor drive module is connected through retrieving the rope with umbrella form drive module, and when the tube brush need move towards heat exchange tube water inlet end direction or tube brush card when in the heat exchange tube, the micro motor among the motor drive module starts, and the initiative provides traction force, accomplishes the recovery of tube brush.

3. In view of the point 3 proposed in the background art, the present invention employs a sensor system in which a distance sensor is combined with a temperature sensor to solve this problem. When the tube brush leaves the recovery end brush basket and enters the heat exchange tube, the distance sensor records the advancing distance of the tube brush in real time, once the tube brush does not reach the set target distance and stops, the tube brush is clamped in the heat exchange tube, the sensor immediately sends a signal to the processor of the control module, the motor is started to drive the module to recover the tube brush, and the tube brush is prevented from blocking the heat exchange tube; the temperature sensor arranged on the pipe brush can record the water temperature change condition in the heat exchange pipe when the pipe brush moves in the heat exchange pipe, and can provide effective information such as the working efficiency of the heat exchanger and the running condition, the cleaning efficiency and the like of the cleaning system for related personnel. When the heat exchange efficiency of the heat exchanger is reduced, the control device automatically starts the cleaning system to clean the heat exchange tube, and after the heat exchange efficiency is improved, the cleaning system is automatically closed, so that the heat exchange tube is efficiently and intelligently cleaned.

Note: the foregoing designs are not sequential, each of which provides a distinct and significant advance in the present invention over the prior art.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic view of a single casing brush cleaning apparatus of the present invention installed at both ends of a heat exchange tube;

FIG. 2 is an exploded view of the assembly of the tube brush cleaning device of the present invention at the water inlet end of the heat exchange tube;

FIG. 3 is an exploded view of the assembly components of the tube brush cleaning device of the present invention at the outlet end of the heat exchange tube;

FIG. 4 is a full sectional view of the tube brush cleaning apparatus of the present invention in a standby state at the water inlet end of the heat exchange tube;

FIG. 5 is a schematic view of the unfolding motion of the frame of the umbrella-shaped unfolding and folding mechanism of the present invention;

FIG. 6 is a schematic view of the umbrella cover fully extended when the cleaning device of the present invention is activated;

FIG. 7 is a schematic view of the position of the tube brush and umbrella-shaped unfolding and folding mechanism reaching the water outlet end of the present invention;

FIG. 8 is a schematic view of the frame retraction of the umbrella-shaped unfolding and folding mechanism of the present invention;

FIG. 9 is a schematic view of the operation of the tube brush of the present invention after it has entered the catch end brush basket;

in the figures, the reference numerals are as follows:

1. the device comprises a motor driving module 2, a cleaning module 3, a tube plate 4, a heat exchange tube 5, a processor 6, a control module 7, a motor shell 8, a micro motor 9, a recovery end brush basket 10, a distance sensor 11, a tube brush 12, an umbrella-shaped unfolding and folding mechanism 13, a recovery rope 14, a temperature sensor 15, a capture end brush basket 16, a main shaft 17, an electric lifting switch 18, a spring

Detailed Description

As shown in fig. 1 to 3: a dual-drive pipe brush cleaning system is composed of a plurality of single sleeve brush cleaning devices, wherein each heat exchange pipe 4 is internally provided with a sleeve brush cleaning device; the single casing brush cleaning device consists of a motor driving module 1, a cleaning module 2, an umbrella-shaped driving module and a control module 6; the effect diagram of the single sleeve brush cleaning device arranged at the two ends of the heat exchange tube is shown in figure 1; the motor driving module 1 consists of a motor shell 7, a micro motor 8 and a recovery rope 13, the micro motor 8 is arranged in the motor shell 7 and is connected with the umbrella-shaped unfolding and folding mechanism 12 through the recovery rope 13, and the motor shell 7 protects the micro motor 8 from water flow; the cleaning module 2 consists of a recovery end brush basket 9, a capture end brush basket 15 and a tube brush 11, wherein the recovery end brush basket 9 and the capture end brush basket 15 are respectively arranged on the outer side of a water inlet end tube plate and the outer side of a water outlet end tube plate of the heat exchange tube and used for receiving and fixing the tube brush 11, the tube brush 11 is sleeved on a main shaft 16 of the umbrella-shaped unfolding and folding mechanism 12, the tube brush 11 is a movable nylon brush, and the bristles on the outer side are alternately formed by soft bristles parallel to a brush basket framework and hard bristles parallel to a brush basket framework gap; the umbrella-shaped driving module consists of an umbrella-shaped unfolding and folding mechanism 12; the control module 6 comprises sensor components such as a distance sensor 10 and a temperature sensor 14 and a processor 5 positioned in a heating and ventilation system control cabinet, wherein the distance sensor component 10 is arranged on a pipe brush 11 and a recovery end brush basket 9, the position information of an umbrella-shaped unfolding and folding mechanism 12 and the position information of the pipe brush 11 are fed back to the processor 5, the temperature sensor component 14 is arranged on the pipe brush 11, and the relevant information in a heat exchange pipe 4 is collected and sent to the processor 5, so that data support is provided for self optimization of a cleaning system operation scheme; the processor 5 receives the signal fed back by the distance sensor 10, and controls the opening and closing of the umbrella cover of the umbrella-shaped unfolding and folding mechanism 12 and the operation and stop of the micro motor 8 according to different positions of the umbrella-shaped unfolding and folding mechanism 12, so as to control the pipe brush cleaning device to complete a normal working process.

When the pipe brush cleaning device is in a water inlet end standby state, as shown in fig. 4, the distance sensor 10 and the temperature sensor 14 which are positioned on the pipe brush 11 start to work, the temperature sensor 14 records the water temperature in the heat exchange pipe in real time, the distance sensor 10 records the position information of the pipe brush 11 in the heat exchange pipe all the time, and the two sensors send data to the processor 5 in the control cabinet for processing. At the moment, the processor 5 positioned in the control cabinet receives and sends signals to control the umbrella cover of the umbrella-shaped unfolding and folding mechanism 12 to be closed, and the micro motor 8 pulls the recovery rope 13; the tail part of a main shaft 16 of the umbrella-shaped unfolding and folding mechanism 12 is connected with the micro motor 8 through a recovery rope 13, and the tube brush 11 is fixed in the recovery end brush basket 9.

As shown in fig. 5 and 6, when the tube brush cleaning device starts to work, the processor 5 sends a signal to the micro motor 8 and the electric lifting switch 17 on the umbrella-shaped unfolding and folding mechanism 12, the electric lifting switch 17 descends, the micro motor 8 starts and recovers the recovery rope, the main shaft 16 of the umbrella-shaped unfolding and folding mechanism 12 moves to the left under the action of traction force, the tube brush 11 moves to the right relatively and pushes open the umbrella frame of the umbrella-shaped unfolding and folding mechanism 12, the umbrella cover is completely unfolded while compressing the spring 18, then the electric lifting switch 17 ascends to fix the unfolded umbrella cover, and finally the unfolding effect of the umbrella cover is as shown in fig. 6, and after the umbrella cover of the umbrella-shaped unfolding and folding mechanism 12 is unfolded, the outer circle radius of the umbrella cover is 80% -90% of the radius of the inner wall of the heat exchange tube 4; after the umbrella fabric of the umbrella-shaped unfolding and folding mechanism 12 is completely unfolded and fixed by the electric lifting switch 17, the micro motor 8 releases the control on the recovery rope 13, water flow pushes the umbrella fabric to move forwards so as to drive the pipe brush 11 to enter the heat exchange pipe 4, and the brush hair can contact with the inner wall of the heat exchange pipe 4 to clean scales.

As shown in fig. 7 to 9, after the tube brush 11 leaves the recovery end brush basket 9 and enters the heat exchange tube 4, the temperature sensor 14 records the water temperature in the heat exchange tube in real time, the distance sensor 10 tracks the position of the tube brush 11 in the heat exchange tube at any time, and the two sensors send data to the processor 5 in the control cabinet for processing. As shown in fig. 7 and 8, when the umbrella-shaped unfolding and folding mechanism 12 drives the tube brush 11 to move to the water outlet end of the heat exchange tube 4, the processor 5 sends a signal, the electric lifting switch 17 descends, the compressed spring 18 releases elastic potential energy to fold the umbrella cover, and after the umbrella cover is completely folded, the electric lifting switch 17 ascends to fix the umbrella cover. As shown in fig. 9, after the umbrella-shaped unfolding and folding mechanism 12 drives the pipe brush 11 to enter the capturing end brush basket 15 under the action of inertia force, the micro motor 8 is started to retract the recovery rope 13, the pulling device moves leftwards, and during the period, the umbrella cover of the umbrella-shaped unfolding and folding mechanism 12 is in a closed state until the pipe brush 11 returns to the position shown in fig. 4, and the system enters a standby state again, so that the whole pipe brush cleaning device completes a circular cleaning task.

Similarly, when the pipe brush 11 is stuck inside the heat exchange pipe 4 or other faults occur, the processor 5 in the control module 6 receives signals sent by the distance sensor 10 and the temperature sensor 14, the processor 5 controls the micro motor 8 to start, the umbrella cover of the umbrella-shaped folding and unfolding mechanism 12 is folded, and the recovery work of the pipe brush 11 is completed actively.

The above detailed description is specific to possible embodiments of the present invention, and the embodiments are not intended to limit the scope of the present invention, and all equivalent implementations or modifications that do not depart from the scope of the present invention are intended to be included within the scope of the present invention.