Water spraying device for buoy cleaning

Abstract

The utility model provides a water spraying device for buoy cleaning, which belongs to the technical field of buoy cleaning and is used for solving the problems of non-uniform buoy cleaning effect and high water consumption of a high-pressure water gun in the prior art. The utility model provides a water spraying device for buoy cleaning. The water spraying device comprises a barrel shell and a nozzle set. The barrel shell is free of a barrel bottom, the nozzle set comprises a water pipe and nozzles, the water pipe is fixedly arranged along a bus of the barrel shell and located on the inner side of the barrel shell, and the multiple nozzles are arranged along the water pipe and spray water. Through the water pipe and the nozzle set which are fixedly arranged along the generatrix of the barrel shell, uniform water spraying and cleaning on the surface of the buoy are achieved, the problem that in the prior art, the flushing effect is not uniform when a high-pressure water gun flushes the buoy is effectively solved, and compared with direct flushing of the buoy through the high-pressure water gun, the advantage of water saving is further achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of buoy cleaning, and particularly relates to a water spraying device for buoy cleaning. Background Art

[0002] As a key facility for maritime navigation and positioning, buoys play a crucial role in ensuring maritime traffic safety and maintaining the marine navigation environment. They are usually composed of a cylindrical floating body, a support structure, a solar panel, etc., and float in the vast ocean for a long time, undertaking multiple tasks such as indicating shipping lanes, marking dangerous areas, and monitoring the marine environment. The coloring of buoys not only has a significant identification function but also can intuitively reflect their working status. Therefore, keeping the buoys clean and the coloring vivid is crucial to ensure their effectiveness.

[0003] However, buoys are set in the marine environment, often gather and dock birds, and their surfaces are often attached with dirt such as bird droppings. These dirt not only seriously affect the visual effect of the buoys, reducing their recognition as navigation marks, but also have a significant impact on the working efficiency of solar panels, resulting in a decrease in charging efficiency and further affecting their navigation assistance ability.

[0004] At present, the commonly used buoy cleaning method in the market mainly relies on high-pressure water gun flushing. However, this method has deficiencies such as uneven flushing effect and large water consumption. Content of the Utility Model

[0005] In view of the above-mentioned disadvantages of the prior art, the purpose of the present utility model is to provide a water spraying device for buoy cleaning, which is used to solve the problems of uneven flushing effect and large water consumption of high-pressure water gun flushing buoys in the prior art.

[0006] To achieve the above purpose and other related purposes, the present utility model provides a water spraying device for buoy cleaning, including a barrel housing and a nozzle group;

[0007] The barrel housing has no bottom, the nozzle group includes a water pipe and nozzles, the water pipe is fixedly arranged along the generatrix of the barrel housing and is located inside the barrel housing, and a plurality of the nozzles are arranged along the water pipe and spray water.

[0008] Optionally, a bottom ring of the barrel housing is rotatably hung, and the bottom ring includes a bottom ring housing and two layers of elastic membranes, and the elastic membranes are located inside;

[0009] A tightening rope is further arranged in the middle of the sandwich layer of the bottom ring housing and the elastic membranes. After the barrel housing covers the buoy, the tightening rope is tightened, and the elastic membranes are tied around the outer periphery of the buoy.

[0010] Optionally, a drawstring device is further provided between the interlayers of the bottom ring housing and the elastic membrane. There are two drawstring devices, which are respectively connected to both ends of the tightening rope and can tighten it. The winding range of the tightening rope between the interlayers of the bottom ring housing and the elastic membrane is greater than one circle.

[0011] Optionally, the bottom of the water pipe is located at the bottom of the barrel housing, and a solenoid valve is provided at the bottom of the water pipe.

[0012] Optionally, the bottom ring housing is mounted on the barrel housing through a sliding clamping structure. The sliding clamping structure includes a protrusion and a groove that are respectively located on the bottom ring housing and the barrel housing and cooperate with each other.

[0013] Optionally, clamping plates are provided on both sides of the nozzle group inside the barrel housing.

[0014] Optionally, a cleaning rod is provided along the generatrix of the barrel housing inside the barrel housing. Both ends of the cleaning rod are respectively connected to the barrel housing through two telescopic members.

[0015] Optionally, the cleaning rod includes an inner ring, an outer ring, connecting columns and pressure sensors;

[0016] A plurality of the connecting columns are connected between the outer circular surface of the inner ring and the inner circular surface of the outer ring, and a plurality of the pressure sensors are arranged on the outer circular surface of the inner ring;

[0017] The outer ring is a cleaning friction material, the connecting columns are materials that can be deformed under force and can recover. When the outer ring is squeezed, the outer ring and the connecting columns are deformed, and the inner circular surface of the outer ring squeezes the pressure sensors on the outer circular surface of the inner ring.

[0018] Optionally, a first reinforcement structure and a second reinforcement structure are respectively provided on the barrel housing along the generatrix and the circumferential direction.

[0019] Optionally, the elastic membrane is made of rubber material, and the drawstring device is a telescopic power source.

[0020] As described above, the water spraying device for buoy cleaning of the present utility model has at least the following beneficial effects:

[0021] Through the water pipe and the nozzle group fixedly arranged along the generatrix of the barrel housing, uniform water spraying and cleaning of the buoy surface are realized, effectively solving the problem of uneven flushing effect when the buoy is flushed by a high-pressure water gun in the prior art. At the same time, the device utilizes the design of the barrel housing and the rotatably hung bottom ring of the barrel, which can closely fit the shape of the buoy, realize the recovery of the flushing water, reduce the water consumption during the cleaning process, avoid the discharge of waste water containing detergent into the ocean, and improve the water resource utilization efficiency. Brief Description of the Drawings

[0022] Figure 1Shown is a schematic diagram of the water spraying device of the present utility model.

[0023] Figure 2 Shown is a schematic diagram of the water spraying device of the present utility model covering a buoy.

[0024] Figure 3 Shown is a schematic diagram of the upper part of the water spraying device of the present utility model being sectioned.

[0025] Figure 4 Shown is a schematic diagram of the bottom ring housing of the lower part of the water spraying device of the present utility model.

[0026] Figure 5 Shown is a schematic diagram of the tightening rope and the rope puller of the present utility model.

[0027] Figure 6 Shown is a schematic diagram of the water spraying device of the present utility model being sectioned.

[0028] Figure 7 Shown is the present utility model Figure 6 A partial enlarged schematic diagram at position A in.

[0029] Figure 8 Shown is a schematic diagram of the cleaning rod of the present utility model.

[0030] Figure 9 Shown is a schematic diagram of the present utility model connected to a crane.

[0031] Figure 10 Shown is a schematic diagram of the working scenario of the present utility model.

[0032] Wherein: barrel housing 70, first reinforcement structure 71, second reinforcement structure 72, bottom ring housing 73, elastic membrane 74, clamping plate 60, nozzle group 61, cleaning rod 62, telescopic member 63, inner ring 521, outer ring 522, connecting column 523, tightening rope 4, rope puller 3. Detailed implementation manners

[0033] The following specific embodiments illustrate the implementation manners of the present utility model, and those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification.

[0034] Please refer to Figures 1 to 10It should be noted that the structures, proportions, sizes, etc. shown in the attached drawings of this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the implementation conditions of the present utility model. Therefore, they do not have any substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size, without affecting the efficacy that the present utility model can produce and the purpose that can be achieved, should still fall within the scope covered by the technical content disclosed in the present utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle", and "one" cited in this specification are only for the convenience of clear narration and are not used to limit the scope of implementation of the present utility model. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope of implementation of the present utility model.

[0035] The following various embodiments are only for illustration purposes. Combinations can be made between the various embodiments, and it is not limited to the content shown in the following single embodiment.

[0036] Please refer to this embodiment Figures 1 - 4 , an embodiment of the water spraying device for buoy cleaning provided by the present utility model, includes a barrel housing 70 and a nozzle group 61;

[0037] The barrel housing 70 has no bottom, and the nozzle group 61 includes a water pipe and nozzles. The water pipe is fixedly arranged along the generatrix of the barrel housing 70 and is located inside the barrel housing 70, and a plurality of nozzles are arranged along the water pipe and spray water towards the buoy.

[0038] In the above embodiment, the usage scenario of the water spraying device is: flushing the offshore buoy. Specifically, as Figure 9 and Figure 10 shown, a lifting device is installed on the workboat. The telescopic mechanism 12 is fixedly arranged at the end of the boom of the lifting mechanism, and the water spraying device is connected to the telescopic end of the telescopic mechanism 12 through a connecting base 8.

[0039] The workboat for performing the cleaning operation can be a buoy workboat, a buoy inspection ship, etc. It is only used as a carrier for the water spraying device, and any ship equipped with the water spraying device can be used as a workboat. When performing the cleaning operation, the workboat sails to the vicinity of the navigation mark, and then the lifting device hoists the water spraying device and lowers it from top to bottom, so that the barrel housing 70 of the water spraying device surrounds and covers the buoy, as Figure 2 shown.

[0040] Then, high-pressure water is introduced into the nozzle group 61 inside the barrel housing 70, and the high-pressure water is sprayed onto the buoy and its steel frame structure through the nozzles, thereby cleaning the bird droppings, etc. on the buoy, making the coloring of the buoy clear and the solar panel work normally, so as to maintain the normal operation of the buoy's navigation aid function.

[0041] During specific implementation, multiple sets of nozzle groups 61 can be arranged along the generatrix direction of the barrel housing 70 so that when the barrel housing 70 covers the buoy 9, the buoy can be flushed from multiple directions simultaneously. The barrel housing 70 can also be rotatably connected to the connection base 8. When cleaning the buoy 9, the barrel housing 70 can be manually pushed to rotate reciprocally, so that the nozzle groups 61 inside the barrel housing 70 can flush the entire range of the buoy. Inside the barrel housing 70, the water pipes of multiple sets of nozzle groups 61 are connected to the water tank and water pump on the ship along the crane. To adapt to the reciprocating rotation of the barrel housing 70, on the one hand, the water pipes at the rotational connection between the barrel housing 70 and the connection base 8 should use flexible hoses and reserve a redundant length; on the other hand, the relative rotational angle between the barrel housing 70 and the connection base 8 should not be too large. For example, when four sets of nozzle groups 61 are arranged at intervals of 90 degrees along the barrel housing 70, a reciprocating rotation range of 45 degrees can ensure that the nozzle groups 61 can flush the entire range of the buoy 9.

[0042] This embodiment can be referred to Figure 4 , a bottom ring of the barrel housing 70 is rotatably hung at the bottom, and the barrel housing 70 and the bottom ring can also rotate relative to each other. The bottom ring includes two layers, a bottom ring housing 73 and an elastic membrane 74, and the elastic membrane 74 is located inside. To achieve relative rotation, the bottom ring housing 73 is mounted on the barrel housing 70 through a sliding clamping structure. The sliding clamping structure includes protrusions and grooves respectively located on the bottom ring housing 73 and the barrel housing 70 and cooperating with each other. It can be referred to Figure 4 the left sectional view.

[0043] A tightening rope 4 is also arranged in the middle of the sandwich between the bottom ring housing 73 and the elastic membrane 74. After the barrel housing 70 covers the buoy, the tightening rope 4 is tightened, and the elastic membrane 74 is tied around the outer periphery of the buoy.

[0044] As Figures 4 - 7 shown, in the initial state, the barrel housing 70 only covers the buoy 9. At this time, the specific situation of the bottom ring is as follows: the tightening rope 4(B) is not tightened, and the elastic membrane 74(B) is in a taut state; once the cleaning device covers the buoy 9, the connection starts. Specifically: the tightening rope 4(A) is tightened, and at the same time, the elastic membrane 74(A) is pulled to closely adhere to the outer periphery of the buoy 9. The elastic membrane 74 can be made of rubber film material. Once it closely adheres to the outer periphery of the buoy 9, a sealing interface is formed, enabling the barrel housing 70 to hold cleaning water.

[0045] In order to be able to recycle the cleaning water in the cleaning barrel after cleaning, a water extraction pipe also needs to be arranged in the barrel. This pipe can use a flexible pipe, and a redundant length should be set and it should be able to adapt to a certain degree of torsion. The water pipes of the nozzle groups 61 can be reused. For example, a one-way valve can be set at the end of the water pipe, as Figure 6As shown in the figure, during water spraying and flushing, the one-way valve 610 closes to prevent the flushing water from flowing into the barrel housing 70 from the end of the water pipe, and the water can only be sprayed out from the nozzle group 61. When pumping out the flushing water, the one-way valve 610 opens and the flushing water is pumped out of the barrel. A one-way nozzle containing a one-way valve can also be used for the nozzle to prevent backflow of water.

[0046] In the above embodiment, the one-way valve at the end of the water pipe can also be replaced with a solenoid valve, that is, the bottom of the water pipe is located at the bottom end of the barrel housing 70, and a solenoid valve is provided at the bottom of the water pipe, which closes during water spraying and opens during water pumping.

[0047] The main working process of the above embodiment is as follows:

[0048] The water spraying device is arranged on the workboat through a crane, and the connecting base 8 is fixedly connected to the crane. When cleaning the buoy 9, the cleaning device covers the buoy 9 from top to bottom. Then, in the bottom ring of the bottom of the cleaning barrel, the tightening rope 4 is tightened (which can be operated manually). As Figure 7 shown in the figure, the elastic membrane 74 is tightly wound around the cylindrical floating body of the buoy 9. Then, the cleaning barrel is driven to rotate reciprocally relative to the connecting base 8 by a driving mechanism or manpower, while the connecting base 8 located above the cleaning barrel and the bottom ring (including two layers of the bottom ring housing 73 and the elastic membrane 74) located below the cleaning barrel remain stationary. The rotating interface between the cleaning barrel and the bottom ring is a sealed interface. The cylindrical floating body of the buoy 9 is integrally connected to the bottom ring, and the connecting base 8 is integrally connected to the lifting mechanism. During the rotation of the cleaning barrel, cleaning water and detergent can be sprayed into the inner side of the barrel housing 70, and the nozzle group on the inner side of the barrel housing 70 can simultaneously clean the cylindrical floating body of the buoy 9 and the upper support structure.

[0049] At the initial stage of cleaning, the inside of the barrel housing 70 is empty, and the nozzle is used to clean with high-pressure water. After enough cleaning water is sprayed in, a large amount of cleaning water is filled in the cleaning barrel. The rotation of the cleaning barrel drives the cleaning water to scour and flow inside the cleaning barrel, forming a cleaning effect like that of a washing machine.

[0050] Its beneficial effects include: being able to clean the surface of the offshore buoy 9. The main pollutants on the offshore buoy include substances such as bird droppings. Bird droppings have strong adhesiveness and seriously affect the coloring clarity, working efficiency, and solar charging efficiency of the buoy, etc. The device of this embodiment can clean the buoy 9 with good cleaning effect. On the one hand, combining high-pressure spray flushing and washing machine-like water flow flushing can ensure the flushing quality; on the other hand, using a special barrel flushing mode can avoid the direct discharge of the flushing water containing detergent into the marine environment, which has good environmental protection significance.

[0051] Its design ingeniously utilizes the combination of an elastic membrane and a tightening rope, enabling the cleaning bucket to closely fit buoys of different sizes, forming the structure of the inner barrel of a washing machine. It can collect and hold the flushing water, improving the cleaning compatibility, adaptability, and cleaning ability, enhancing the cleaning effect, and ensuring the recovery of the cleaning water containing detergent during the cleaning process. The device drives the cleaning bucket to rotate through a driving mechanism, enabling automatic cleaning, greatly improving the cleaning efficiency, and reducing the labor intensity and risk of manual cleaning. The device can maintain a closed circulation of the cleaning water during the cleaning process, preventing the flushing water containing detergent from being directly discharged into the marine environment, which is of great significance for protecting the marine ecological environment. At the same time, considering that fresh water is required for cleaning, the recovery of the cleaning water enables its reuse, allowing the fresh water resources carried during one sea voyage to clean more buoys and improving the operation efficiency of the workboat.

[0052] Please refer to this embodiment Figure 4 and Figure 5 , and a rope puller 3 is also provided in the middle of the sandwich layer between the bottom ring housing 73 and the elastic membrane 74. There are two rope pullers 3, which are respectively connected to both ends of the tightening rope 4 and can tighten it. The winding range of the tightening rope 4 in the middle of the sandwich layer between the bottom ring housing 73 and the elastic membrane 74 is more than one circle to ensure the tightening effect of the tightening rope 4 on the elastic membrane 74 and the sealing effect after tightening. The rope puller 3 can be a telescopic mechanism, such as a telescopic cylinder. When it retracts, it tightens the tightening rope 4, making the elastic membrane 74 closely adhere to the circumference of the buoy to form a sealing interface. When it extends, it loosens the tightening rope 4, allowing the elastic membrane 74 to return to the taut state as shown in Figure 5 (the state shown by the elastic membrane 74(B) in Figure 7 ) to facilitate the detachment of the cleaning device from the buoy.

[0053] This embodiment can be referred to Figure 3 and Figure 6 . On the inner side of the bucket housing 70, clamping plates 60 are provided on both sides of the nozzle group 61.

[0054] Before the cleaning starts, the elastic membrane 74 adheres to the circumferential surface of the floating body of the buoy 9, cooperating with the bucket housing 70 to form a flushing water accommodation area. During cleaning, first, high-pressure water containing detergent is sprayed through the nozzle group 61 to wash the buoy in the way of high-pressure water column scouring. At the same time, the flushing water accumulates in the bucket housing 70. After there is enough water in the bucket, the nozzle group 61 is closed. Let the bucket housing 70 rotate reciprocally, for example, rotate 30 degrees forward and then 30 degrees backward alternately. Utilizing the water-blocking effect of the clamping plates 60 in the bucket, the flushing water in the bucket is driven to flow back and forth to wash the surface of the buoy. Through the two modes of high-pressure water column flushing and water flow scouring in the bucket, the dirt such as bird droppings on the buoy is powerfully cleaned.

[0055] This embodiment can be referred to Figure 3, inside the barrel housing 70, a cleaning rod 62 is arranged along the generatrix of the barrel housing 70. Both ends of the cleaning rod 62 are respectively connected to the barrel housing 70 through two telescopic members 63, and a pressure sensor is arranged on the cleaning rod 62. The cleaning rod 62 is fixed to the barrel housing 70 and will rotate around the buoy together with the barrel housing 70. The cleaning rod 62 can wipe the buoy and can also stir the cleaning water in the barrel housing 70. The two telescopic members 63 can adjust the inclination angle of the cleaning rod 62. For different buoy models, the cleaning rod 62 can be adapted to the support structure of the buoy 9 (generally conical or equal cross-section shape). The pressure sensor can sense the contact between the cleaning rod 62 and the buoy, so that the cleaning rod 62 can brush the buoy structure without colliding with the buoy structure. In this embodiment, under the two modes of high-pressure water column flushing and water flow scouring in the barrel, a wiping cleaning mode is added, which can increase the cleaning ability and ensure thorough cleaning, especially having a high cleaning effect on the solar panel on the buoy.

[0056] Further, as Figure 8 shown, the cleaning rod 62 includes an inner ring 521, an outer ring 522, connecting columns 523 and pressure sensors;

[0057] A plurality of connecting columns 523 are connected between the outer circular surface of the inner ring 521 and the inner circular surface of the outer ring 522, and a plurality of pressure sensors are arranged on the outer circular surface of the inner ring 521;

[0058] The outer ring 522 is a cleaning friction material, such as sponge, and the connecting column 523 is a material that can be deformed under force and can recover, such as a rubber column or a plastic column. When the outer ring 522 is squeezed, the outer ring 522 and the connecting column 523 are deformed, and the inner circular surface of the outer ring 522 squeezes the pressure sensor on the outer circular surface of the inner ring 521. Pressure sensors are arranged circumferentially on the cleaning rod 62. During the rotation of the cleaning rod 62 and contact with the buoy structure, the readings of the pressure sensors on the cleaning rod 62 will change.

[0059] Specifically, when both ends of the telescopic members 63 are retracted, the cleaning rod 62 is not in contact with the buoy structure. At this time, the reading of the pressure sensor is assumed to be reading one. Then, during the process of gradually extending the telescopic members 63, once the cleaning rod 62 comes into contact with the buoy structure, the reading of the pressure sensor will surely change, and at this time, it is not appropriate to continue extending the telescopic members 63. In order to increase the sensitivity, a plurality of pressure sensors can be arranged along the length and circumference of the cleaning rod 62, so as to accurately sense the contact part.

[0060] Further, as Figure 1 shown, the barrel housing 70 is respectively provided with a first reinforcement structure 71 and a second reinforcement structure 72 along the generatrix and the circumference. The elastic membrane 74 is made of rubber material, and the rope puller 3 is a telescopic power source, such as a hydraulic or electric telescopic cylinder.

[0061] In summary, the utility model effectively overcomes various disadvantages in the prior art, can produce beneficial technical effects, and has remarkable progress.

[0062] The above embodiments are only illustrative of the principles and effects of the utility model, and are not intended to limit the utility model. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the utility model. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the utility model should still be covered by the claims of the utility model.

Claims

1. A water spraying device for buoy cleaning, characterized in that: It includes a barrel housing (70) and a nozzle group (61); The barrel housing (70) has no bottom, the nozzle group (61) includes a water pipe and nozzles, the water pipe is fixedly arranged along the generatrix of the barrel housing (70) and is located inside the barrel housing (70), and a plurality of the nozzles are arranged along the water pipe and spray water.

2. The water spraying device for buoy cleaning according to claim 1, characterized in that, A bottom ring is rotatably hung at the bottom of the barrel housing (70), and the bottom ring includes two layers, a bottom ring housing (73) and an elastic film (74), and the elastic film (74) is located inside; A tightening rope (4) is further arranged in the middle of the sandwich between the bottom ring housing (73) and the elastic film (74). After the barrel housing (70) covers the buoy, the tightening rope (4) is tightened, and the elastic film (74) is tied around the outer periphery of the buoy.

3. The water spraying device for buoy cleaning according to claim 2, wherein, A rope puller (3) is further arranged in the middle of the sandwich between the bottom ring housing (73) and the elastic film (74). There are two rope pullers (3), which are respectively connected to both ends of the tightening rope (4) and can be tightened, and the winding range of the tightening rope (4) in the middle of the sandwich between the bottom ring housing (73) and the elastic film (74) is more than one circle.

4. The water spraying device for buoy cleaning according to claim 2, characterized in that, The bottom of the water pipe is located at the bottom of the barrel housing (70), and a solenoid valve is arranged at the bottom of the water pipe.

5. The water spraying device for buoy cleaning according to claim 2, characterized in that, The bottom ring housing (73) is mounted on the barrel housing (70) through a sliding clamping structure, and the sliding clamping structure includes a protrusion and a groove that are respectively located on the bottom ring housing (73) and the barrel housing (70) and cooperate with each other.

6. The water spraying device for buoy cleaning according to claim 1, characterized in that, Inside the barrel housing (70), clamping plates (60) are arranged on both sides of the nozzle group (61).

7. The water spraying device for buoy cleaning according to claim 1, characterized in that, Inside the barrel housing (70), a cleaning rod (62) is arranged along the generatrix of the barrel housing (7), and both ends of the cleaning rod (62) are respectively connected to the barrel housing (70) through two telescopic members (63).

8. The water spraying device for buoy cleaning according to claim 7, characterized in that, The cleaning rod (62) includes an inner ring (521), an outer ring (522), a connecting column (523) and a pressure sensor; A plurality of the connecting columns (523) are connected between the outer circular surface of the inner ring (521) and the inner circular surface of the outer ring (522), and a plurality of the pressure sensors are arranged on the outer circular surface of the inner ring (521); The outer ring (522) is a cleaning friction material, the connecting column (523) is a material that can be deformed by force and can recover. When the outer ring (522) is squeezed, the outer ring (522) and the connecting column (523) are deformed, and the inner circular surface of the outer ring (522) squeezes the pressure sensor on the outer circular surface of the inner ring (521).

9. The water spraying device for buoy cleaning according to claim 1, wherein, First reinforcement structures (71) and second reinforcement structures (72) are respectively arranged on the barrel housing (70) along the generatrix and the circumferential direction.

10. The water spraying device for buoy cleaning according to claim 3, wherein The elastic film (74) is made of rubber material, and the rope puller (3) is a telescopic power source.

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