Drop pipe riprap ship riprap pipe and its storage device, storage method

Abstract

The application discloses a ship stone-throwing pipe and a storage device and method thereof. The stone-throwing pipe comprises a pipe body, two single ear seats are symmetrically arranged on the upper outer wall of the pipe body, a single ear plate is welded on the top of each single ear seat, two first ear plates are symmetrically arranged on the upper outer wall of the pipe body and located at 90 degrees of the single ear seats, two second ear plates are symmetrically arranged on the lower outer wall of the pipe body, the two second ear plates are coplanar with the two single ear seats, two double ear seats are symmetrically arranged on the lower outer wall of the pipe body and located at 90 degrees of the second ear plates, and a double ear plate is welded on the bottom of each double ear seat. The storage device comprises a frame, a plurality of rows of storage units are arranged on the frame, each row of storage units is provided with a plurality of pipe storage positions, and a guide positioning mechanism is arranged on the top of each pipe storage position. The adjacent stone-throwing pipes are connected by the combination of the ear plate, the pin shaft and the shackle and the ring chain, so that the pipe is rigid and flexible, and fatigue fracture is not prone to occurring.

Description

Technical Field

[0001] This invention belongs to the field of marine engineering equipment technology, specifically relating to a rock-throwing pipe for a rock-throwing vessel, a storage device for the rock-throwing pipe for a rock-throwing vessel, and a storage method for the rock-throwing pipe for a rock-throwing vessel. Background Technology With the development of science and technology and the exploitation of marine resources, offshore oil and gas fields, offshore wind power, and various functional offshore structures are gradually expanding into the open sea, making the demand for underwater foundation treatment and laying engineering increasingly urgent. Various submarine pipelines are widely used in the development of marine resources. These pipelines, laid on the seabed, are prone to deformation, breakage, and leakage during installation and use due to various external forces. Therefore, effective protective measures are needed for submarine pipelines. Among the many protective measures, especially in deep-water environments, underwater pipe laying and rock burial are the most effective, economical, and feasible. In underwater pipe laying, the design of the rock-laying pipe directly determines the safety and efficiency of underwater rock placement. Existing technology includes: Application No. 201810447670.6, entitled "A Stone-Throwing Pipe and Stone-Throwing System," which discloses a cylindrical stone-throwing pipe with the following features at one end: a clamping part for clamping by a clamping device; a guiding part for guiding when docking with other stone-throwing pipes; a first traction rope groove for accommodating a pipeline traction rope; and a rope groove baffle that opens under external force to allow the pipeline traction rope to enter the first traction rope groove, and closes when no external force is applied, locking the pipeline traction rope inside. The other end of the stone-throwing pipe also has a second traction rope groove. Although this prior art uses two symmetrically arranged pipeline traction ropes for connection, ensuring axis alignment when connecting the upper and lower stone-throwing pipes, the pipeline traction rope runs through the entire stone-throwing pipe string, making it highly susceptible to fatigue fracture due to the influence of waves, currents, and surges. Summary of the Invention

[0002] The first objective of this invention is to provide a rock-throwing pipe for rock-throwing vessels, which solves the problem that existing rock-throwing pipes are prone to fatigue fracture due to the influence of the marine environment.

[0003] A second objective of the present invention is to provide a storage device for the quarrying tubes of a drop-tube quarrying vessel.

[0004] A third objective of this invention is to provide a method for storing quarrying tubes for quarrying vessels.

[0005] The first technical solution adopted in this invention is a rock-throwing pipe for a rock-throwing vessel, comprising a pipe body, two single-ear seats symmetrically arranged on the upper outer wall of the pipe body, each single-ear seat having a single-ear plate welded to its top, and each single-ear plate having a first pin hole; two first-ear plates symmetrically arranged on the upper outer wall of the pipe body at a position 90° from the single-ear seats, each first-ear plate having a second pin hole; two second-ear plates symmetrically arranged on the lower outer wall of the pipe body, the two second-ear plates being coplanar with the two single-ear seats, each second-ear plate having a third pin hole; and two double-ear seats symmetrically arranged on the lower outer wall of the pipe body at a position 90° from the second-ear plates, each double-ear seat having a double-ear plate welded to its bottom, and each double-ear plate having a fourth pin hole. The invention is further characterized by: The first and fourth pin holes have the same diameter, and the second and third pin holes have the same diameter.

[0006] Each fourth pin hole is equipped with a pin shaft; each third pin hole is equipped with an upper shackle, each upper shackle is connected to one end of the chain, and the other end of the chain is connected to the lower shackle.

[0007] The second technical solution adopted in this invention is a storage device for the rock-throwing pipe of a rock-throwing vessel, comprising a frame, several rows of storage units arranged on the frame, several storage positions in each row of storage units, a guide positioning mechanism at the top of each storage position, a high-level passageway at the top of the frame and between adjacent rows of storage units, and a middle channel arranged inside the frame, the middle channel being arranged along the axis of the frame and perpendicular to the high-level passageway. The invention is further characterized by: Each elevated passageway is equipped with a ladder at one end near the central aisle; each storage tank is supported at its bottom.

[0008] The guiding and positioning mechanism includes two symmetrically arranged storage tube slots on both sides of the storage tube position. Each storage tube slot includes a front guide plate and a rear guide plate, and a left side plate is arranged between the front guide plate and the rear guide plate.

[0009] The front guide plate and the rear guide plate have the same structure, both including a first stiffener. The bottom end of the first stiffener is connected to the top end of the frame. A first inclined plate is provided at the top end of the first stiffener. A first upright plate is vertically provided on the side of the first stiffener near the storage tube position. One end of the first inclined plate is connected to the top end of the first upright plate. The angle between the first inclined plate and the side of the first upright plate near the first stiffener is an obtuse angle.

[0010] The side plate includes a second upright plate vertically installed at the top of the frame. A second stiffening plate is provided on the side of the second upright plate away from the storage pipe position. The bottom of the second stiffening plate is connected to the top of the frame. A second inclined plate is provided at the top of the second upright plate. The angle between the second upright plate and the second inclined plate near the second stiffening plate is an obtuse angle.

[0011] The third technical solution adopted in this invention is a method for storing the stone-throwing pipe of a drop-tube stone-throwing vessel. The storage device described above is used, and the specific steps are as follows: the stone-throwing pipe is hoisted to the storage position through the middle channel. The first and second inclined plates guide the single lug of the stone-throwing pipe. When it falls between the first and second vertical plates, the single lug is limited. At this time, the bottom of the stone-throwing pipe sits on the support, thus completing the storage of the stone-throwing pipe. The operator can climb the ladder to the high-level passageway to maintain the stone-throwing pipe and perform other auxiliary operations. The beneficial effects of this invention are as follows: The stone-throwing pipe for drop-tube stone-throwing vessels of this invention features a 90° angle between the upper and lower joints of a single stone-throwing pipe. Each pair of stone-throwing pipes is connected using a combination of ear plates and pins, and shackles and chains. This design combines rigidity and flexibility, resulting in a simple, safe, and reliable structure that is less prone to fatigue fracture. Furthermore, a certain gap is reserved at the joint of the pipe bodies after the two stone-throwing pipes are connected, which facilitates water drainage during the sinking of the dropped stone, improving stone-throwing efficiency. The storage device for the stone-throwing pipe for drop-tube stone-throwing vessels of this invention provides accurate and reliable storage and positioning of the stone-throwing pipes, and convenient and quick hoisting, meeting the requirements for safe and efficient stone-throwing operations at sea. Attached Figure Description

[0012] Figure 1 This is a front view of a single stone-throwing tube of the present invention; Figure 2 This is a left view of a single stone-throwing tube of the present invention; Figure 3 This is a front view of the three stone-throwing pipes of the present invention connected together; Figure 4 This is a front view of the stone-throwing tube storage device of the present invention; Figure 5 This is a top view of the stone-throwing tube storage device of the present invention; Figure 6 This is a top view of the stone-throwing tube storage device of the present invention, specifically section AA. Figure 7 This is a front view of the frame of the stone-throwing tube storage device of the present invention; Figure 8 This is a top view of the frame of the stone-throwing tube storage device of the present invention; Figure 9 This is a top view of the stone-throwing tube storage device of the present invention, specifically a cross-sectional view (BB). Figure 10 This is a CC cross-sectional view of a single stone-throwing tube of the present invention in the storage position; Figure 11 This is a top view of the single stone-throwing tube of the present invention in the storage position; Figure 12 This is a left view of the single stone-throwing tube of the present invention in the storage position; Figure 13This is a front view of the front guide plate and the rear guide plate of the guiding and positioning structure of the present invention; Figure 14 This is a left view of the front guide plate and the rear guide plate of the guiding and positioning structure of the present invention; Figure 15 This is a front view of the side plate of the guide positioning structure of the present invention.

[0013] Figure 16 This is a top view of the side plate of the guide positioning structure of the present invention.

[0014] In the diagram, 1. Stone-throwing pipe; 2. Storage device; 3. Upper shackle; 4. Chain; 5. Lower shackle; 6. Pin; 7. Intermediate channel; 8. Moon pool; 101. Pipe body; 102. Single ear seat; 103. Single ear plate; 104. First ear plate; 105. Double ear seat; 106. Double ear plate; 107. Second ear plate; 201. Frame; 202. Guide and positioning mechanism; 203. High-level passageway; 204. Ladder; 205. Support; 2021. Front guide plate; 2023. Rear guide plate; 2022. Side plate; 20211. First inclined plate; 20212. First upright plate; 20213. First stiffening plate; 20221. Second inclined plate; 20222. Second upright plate; 20223. Second stiffening plate. Detailed Implementation

[0015] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0016] Example 1 The present invention relates to a stone-throwing pipe for a drop-tube stone-throwing vessel, the structure of which is as follows: Figure 1 and Figure 2As shown, the device includes a tube body 101. Two single-ear seats 102 are symmetrically arranged on the upper outer wall of the tube body 101. Each single-ear seat 102 has a single-ear plate 103 welded to its top. Each single-ear plate 103 has a first pin hole. Two first-ear plates 104 are symmetrically arranged on the upper outer wall of the tube body 101 at a 90° position relative to the single-ear seats 102. Each first-ear plate 104 has a second pin hole. Two second-ear plates 107 are symmetrically arranged on the lower outer wall of the tube body 101. The two second-ear plates 107 are coplanar with the two single-ear seats 102. Each second-ear plate 107 has a third pin hole. The second and third pin holes have the same diameter. [The text abruptly ends here, likely due to an incomplete sentence or missing information.] Two double-ear seats 105 are symmetrically arranged at 90° positions. Each double-ear seat 105 has a double-ear plate 106 welded to its bottom. Each double-ear plate 106 has a fourth pin hole. The diameter of the first pin hole and the fourth pin hole are the same. Each fourth pin hole has a pin 6 installed inside. The pin 6 is used to connect with the first pin hole on the stone-throwing pipe to which it is connected. Each third pin hole has an upper shackle 3 installed inside. Each upper shackle 3 is connected to one end of the ring chain 4. The other end of the ring chain 4 is connected to the lower shackle 5. The lower shackle 5 is used to connect with the second pin hole on the stone-throwing pipe to which it is connected.

[0017] like Figure 3 As shown, when two stone-throwing pipes 1 are connected, the upper and lower stone-throwing pipes 1 are joined at a 90° angle around their axis. The fourth pin hole on the double-ear plate 106 of the upper stone-throwing pipe 1 aligns with the first pin hole on the single-ear plate 103 of the lower stone-throwing pipe 1, and they are connected to the pin shaft 6. After connection, there is a gap between the pipe bodies 101 of the upper and lower stone-throwing pipes 1 (i.e., the side of the first pin hole away from the single-ear seat 102 is located above the top of the pipe body 101, and the side of the fourth pin hole away from the double-ear seat 105 is located below the bottom of the pipe body 101). The gap size ensures that the stone does not leak out when falling, and the sinking stone during throwing can also drain water from the pipe body 101 through the gap, improving throwing efficiency. Simultaneously, the double-ear plate 106 and the single-ear plate 102 can... The rock-throwing tubes can rotate around the pin 6 to avoid damage caused by the wave flow when the rigid connection is applied. The third pin hole on the second ear plate 107 of the upper rock-throwing tube 1 is connected to the upper shackle 3, and the second pin hole on the first ear plate 104 of the lower rock-throwing tube 1 is connected to the lower shackle 5. The upper shackle 3 and the lower shackle 5 are connected by the ring chain 4. The combined length of the upper shackle 3, the ring chain 4 and the lower shackle 5 is such that the tube body 101 of the upper and lower rock-throwing tubes 1 will not be squeezed when rotating around the pin 6, and it also has a certain rotation angle, ensuring that the rock-throwing tube 1 is both flexible and will not be damaged. When the third rock-throwing tube 1 is connected to the aforementioned corpse-running rock-throwing tube 1, they are aligned at 90°. This connection is repeated until the total connection length of the corpse-running tubes 1 meets the design requirements.

[0018] Example 2 The storage device 2 for the quarrying pipe of the quarrying vessel of the present invention has the following structure: Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, the system includes a frame 201, on which several rows of storage units are arranged. Each row of storage units has several storage tube positions, and each storage tube position can store one stone-throwing tube 1 involved in Embodiment 1. Each storage tube position is equipped with a guide positioning mechanism 202 at the top. By setting the guide positioning mechanism 202, it is ensured that the stone-throwing tube 1 can be smoothly hoisted into the storage tube position and can be effectively limited when the ship is sailing. A high-level passageway 203 is set at the top of the frame 201 and between two adjacent rows of storage units, which facilitates the operation of personnel to walk back and forth on the high-level passageway 203 to perform maintenance and other auxiliary operations on the stone-throwing tubes 1 on both sides. A middle channel 7 is set inside the frame 201. The middle channel 7 is set along the axis of the frame 201 and is perpendicular to the high-level passageway 203. Each row of slings 1 can be hoisted into the central channel 7 and then moved along the central channel 7 toward the ship's central moon pool 8, where they are lowered into the center of the moon pool 8. The storage device 2 on the side closer to the ship's moon pool 8 is equipped with a short section storage area and a damage control storage area.

[0019] The structure of the quarry pipe 1 includes a pipe body 101. Two single-ear seats 102 are symmetrically arranged on the upper outer wall of the pipe body 101. Each single-ear seat 102 has a single-ear plate 103 welded to its top, and each single-ear plate 103 has a first pin hole. Two first-ear plates 104 are symmetrically arranged on the upper outer wall of the pipe body 101 at a 90° position relative to the single-ear seats 102. Each first-ear plate 104 has a second pin hole. Two second-ear plates 107 are symmetrically arranged on the lower outer wall of the pipe body 101. The two second-ear plates 107 are coplanar with the two single-ear seats 102, and each second-ear plate 107 has a third pin hole. The second and third pin holes have the same diameter. [The text abruptly ends here, likely due to an incomplete sentence or missing information.] Two double-ear seats 105 are symmetrically arranged at 90° positions. Each double-ear seat 105 has a double-ear plate 106 welded to its bottom. Each double-ear plate 106 has a fourth pin hole. The diameter of the first pin hole and the fourth pin hole are the same. Each fourth pin hole has a pin 6 installed inside. The pin 6 is used to connect with the first pin hole on the stone-throwing pipe to which it is connected. Each third pin hole has an upper shackle 3 installed inside. Each upper shackle 3 is connected to one end of the ring chain 4. The other end of the ring chain 4 is connected to the lower shackle 5. The lower shackle 5 is used to connect with the second pin hole on the stone-throwing pipe to which it is connected.

[0020] Example 3 The storage device 2 for the rock-throwing pipe of the present invention includes a frame 201, on which several rows of storage units are arranged. Each row of storage units is provided with several storage positions. Each storage position can store one rock-throwing pipe 1 involved in Embodiment 1. Each storage position is provided with a guide positioning mechanism 202 at the top. By setting the guide positioning mechanism 202, it is ensured that the rock-throwing pipe 1 can be smoothly hoisted to the storage position and can be effectively limited when the ship is sailing. A high-level passageway 203 is provided at the top of the frame 201 and between two adjacent rows of storage units, so that operators can walk back and forth on the high-level passageway 203 to maintain and perform other auxiliary operations on the rock-throwing pipes 1 on both sides. A middle channel 7 is provided inside the frame 201. The middle channel 7 is arranged along the axis of the frame 201 and perpendicular to the high-level passageway 203. Each row of slings 1 can be hoisted into the central channel 7 and then moved along the channel 7 toward the ship's central moon pool 8, where they are lowered into the center of the moon pool 8. The storage device 2 on the side closest to the ship's moon pool 8 is equipped with a short section storage area and a damage control storage area.

[0021] like Figure 8 and Figure 9 As shown, each high-level passageway 203 is equipped with a ladder 204 at one end near the middle passageway 7 so that operators can access the high-level passageway 203 of the storage rack 2. The number of ladders 204 corresponds to the number of high-level passageways 203. Each storage pipe position is equipped with a support 205 at the bottom so that when the quarry pipe 1 is placed in the storage pipe position, the bottom surface of the pipe body 101 can sit on the support 205, so that the double ear plate 106 of the quarry pipe 1 does not come into contact with the main deck of the ship and be damaged. The support 205 is two I-beams.

[0022] Example 4 Based on embodiment 3, the guide positioning mechanism 202 includes two storage tube slots symmetrically arranged on both sides of the storage tube position. The two single ear seats 102 of the stone throwing tube 1 can be confined in the storage tube slots. After the stone throwing tube 1 rotates 180° around the axis, it can also be confined in the storage tube slots.

[0023] like Figure 10 , Figure 11 , Figure 12 As shown, each storage tube slot includes a front guide plate 2021 and a rear guide plate 2023. A left side plate 2022 is provided between the front guide plate 2021 and the rear guide plate 2023. The front guide plate 2021 and the rear guide plate 2023 are coplanar, and the left side plate 2022 is located on the side of the front guide plate 2021 away from the storage tube position.

[0024] Example 5 Based on Example 4, such as Figure 13 and Figure 14As shown, the front guide plate 2021 and the rear guide plate 2023 have the same structure, both including a first stiffener 20213. The bottom end of the first stiffener 20213 is connected to the top end of the frame 201. A first inclined plate 20211 is provided at the top end of the first stiffener 20213. A first upright plate 20212 is vertically provided on the side of the first stiffener 20213 near the storage tube position. Specifically, the first stiffener 20213 is welded to the first upright plate 20212 and the first inclined plate 20211. One end of the first inclined plate 20211 is connected to the first upright plate 20212. The top of the plate 20212 is connected to the first inclined plate 20211, which is used for guidance. When the stone-throwing tube 1 is hoisted from the middle channel 7 to the storage position, it is used to guide the single ear seat 102 of the stone-throwing tube 1. The first vertical plate 20212 is used for limiting. After being guided by the first inclined plate 20211, the stone-throwing tube 1 falls smoothly into the first vertical plate 20212. At the same time, it can prevent the stone-throwing tube 1 from shifting and damaging the tube body 101 when stored in the storage position. The angle between the first inclined plate 20211 and the side of the first vertical plate 20212 near the first stiffener 20213 is an obtuse angle.

[0025] like Figure 15 and Figure 16 As shown, the side plate 2022 includes a second upright plate 20222 vertically disposed on the top of the frame 201. A second stiffening plate 20223 is disposed on the side of the second upright plate 20222 away from the storage pipe position. The bottom of the second stiffening plate 20223 is connected to the top of the frame 201. A second inclined plate 20221 is disposed on the top of the second upright plate 20222. Specifically, the second stiffening plate 20223 is welded to the second upright plate 20222, and the second upright plate 20222 is welded to the second inclined plate 20221. The second inclined plate 20221 is used for guidance. When the stone-throwing tube 1 is hoisted from the middle channel 7 to the storage position, it is used to guide the single ear seat 102 of the stone-throwing tube 1. The second vertical plate 20222 is used for limiting. After being guided by the second inclined plate 20221, the stone-throwing tube 1 falls smoothly into the second vertical plate 20222. At the same time, it can prevent the stone-throwing tube 1 from shifting and damaging the tube body 101 when stored in the storage position. The angle between the second vertical plate 20222 and the side of the second inclined plate 20221 near the second stiffener 20223 is an obtuse angle.

[0026] Example 6 The storage method for the stone-throwing pipe of the present invention uses the storage device 2 described in Example 5, and is implemented according to the following steps: the stone-throwing pipe 1 is hoisted to the storage position through the intermediate channel 7. The first inclined plate 20211 and the second inclined plate 20221 guide the single ear seat 102 of the stone-throwing pipe to fall between the first upright plate 20212 and the second upright plate 20222, and the single ear seat 102 is limited. At this time, the bottom of the stone-throwing pipe sits on the support 205, and the storage of the stone-throwing pipe is completed. The operator can climb the ladder 204 to the high-level passageway 203 to perform maintenance and other auxiliary operations on the stone-throwing pipe.

Claims

1. A stone-throwing pipe for a drop-pipe stone-throwing vessel, characterized in that, The tube includes a tube body (101). Two single-ear seats (102) are symmetrically arranged on the upper outer wall of the tube body (101). Each single-ear seat (102) has a single-ear plate (103) welded to its top. Each single-ear plate (103) has a first pin hole. Two first ear plates (104) are symmetrically arranged on the upper outer wall of the tube body (101) at a position 90° to the single-ear seats (102). Each first ear plate (104) has a second pin hole. The tube body (101)... Two second ear plates (107) are symmetrically arranged on the lower outer wall. The two second ear plates (107) are coplanar with the two single ear seats (102). Each second ear plate (107) is provided with a third pin hole. Two double ear seats (105) are symmetrically arranged on the lower outer wall of the tube body (101) at a position 90° from the second ear plates (107). Each double ear seat (105) is welded to the bottom of a double ear plate (106). Each double ear plate (106) is provided with a fourth pin hole.

2. The quarrying pipe for a quarrying vessel according to claim 1, characterized in that, The first pin hole and the fourth pin hole have the same diameter, and the second pin hole and the third pin hole have the same diameter.

3. The stone-throwing pipe for a drop-pipe stone-throwing vessel according to claim 2, characterized in that, Each of the fourth pin holes is provided with a pin shaft (6); each of the third pin holes is provided with an upper shackle (3), each upper shackle (3) is connected to one end of the ring chain (4), and the other end of the ring chain (4) is connected to the lower shackle (3).

4. The storage device for the quarrying pipe of the drop-pipe quarrying vessel according to claim 3, characterized in that, Includes a frame (201), on which several rows of storage units are provided, each row of storage units is provided with several storage tube positions, and each storage tube position is provided with a guide positioning mechanism (202) at the top. A high-level passageway (203) is provided at the top of the frame (201) and between two adjacent rows of storage units. A middle channel (7) is provided inside the frame (201), and the middle channel (7) is provided along the axis of the frame (201) and perpendicular to the high-level passageway (203).

5. The storage device for the quarrying pipe of the drop-pipe quarrying vessel according to claim 4, characterized in that, Each of the high-level passageways (203) is provided with a ladder (204) at one end near the middle passageway (7); each of the storage positions is provided with a support (205) at the bottom.

6. The storage device for the quarrying pipe of the drop-pipe quarrying vessel according to claim 5, characterized in that, The guiding and positioning mechanism (202) includes two symmetrically arranged storage tube slots on both sides of the storage tube position. Each storage tube slot includes a front guide plate (2021) and a rear guide plate (2023). A left side plate (2022) is arranged between the front guide plate (2021) and the rear guide plate (2023).

7. The storage device for the quarrying pipe of the drop-pipe quarrying vessel according to claim 6, characterized in that, The front guide plate (2021) and the rear guide plate (2023) have the same structure, both including a first stiffener plate (20213). The bottom end of the first stiffener plate (20213) is connected to the top end of the frame (201). A first inclined plate (20211) is provided at the top end of the first stiffener plate (20213). A first upright plate (20212) is vertically provided on the side of the first stiffener plate (20213) near the storage position. One end of the first inclined plate (20211) is connected to the top end of the first upright plate (20212). The angle between the first inclined plate (20211) and the side of the first upright plate (20212) near the first stiffener plate (20213) is an obtuse angle.

8. The storage device for the quarrying pipe of the drop-pipe quarrying vessel according to claim 7, characterized in that, The side plate (2022) includes a second upright plate (20222) vertically installed on the top of the frame (201). A second stiffening plate (20223) is provided on the side of the second upright plate (20222) away from the storage position. The bottom of the second stiffening plate (20223) is connected to the top of the frame (201). A second inclined plate (20221) is provided on the top of the second upright plate (20222). The angle between the second upright plate (20222) and the side of the second inclined plate (20221) near the second stiffening plate (20223) is an obtuse angle.

9. A method for storing quarrying pipes for a drop-pipe quarrying vessel, characterized in that, Using the storage device described in claim 8, the specific steps are as follows: the stone-throwing tube is hoisted to the storage position through the intermediate channel (7). The first inclined plate (20211) and the second inclined plate (20221) guide the single ear seat (102) of the stone-throwing tube to fall between the first upright plate (20212) and the second upright plate (20222). The single ear seat (102) is then limited. At this time, the bottom of the stone-throwing tube sits on the support (205), thus completing the storage of the stone-throwing tube. The operator can climb the ladder (204) to the high-level passageway (203) to perform maintenance and other auxiliary operations on the stone-throwing tube.

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