Water spray nozzle protection structure for open cargo hold of ship

Abstract

The invention relates to the technical field of ships, and discloses a ship open cargo hold water spray nozzle protection structure which comprises a fixed part, a movable part, a spring and a single-action hydraulic cylinder. The fixed part is fixedly arranged on the wall of the cargo hold, the movable part is slidably arranged in the fixed part, the spray head is exposed out of one end, extending into the cargo hold, of the fixed part, the spray head is located in the movable part when the movable part is located at the first position, and the spray head is exposed out of the movable part when the movable part is located at the second position. The spring connects the fixed piece and the movable piece. The single-action hydraulic cylinder comprises a cylinder body and a piston rod, the cylinder body is fixed to the fixed part, when the piston rod is located at the third position and the movable part is located at the first position, the piston rod abuts against the movable part, and when the piston rod is located at the fourth position, the spring can drive the movable part located at the first position to move to the second position. And a liquid inlet of the single-action hydraulic cylinder is communicated with the spraying water pipe.

Description

Technical Field

[0001] The present invention relates to the technical field of ships, and particularly to a protection structure for a water spray nozzle in an open cargo hold of a ship. Background Art

[0002] The water spray nozzles in the open cargo hold of a ship need to be arranged in the open cargo hold so that the water spray curtain formed by the nozzles can effectively protect the cargo hold bulkhead and prevent damage to the cargo hold bulkhead when a fire breaks out inside the open cargo hold. However, precisely because the nozzles need to be in the open cargo hold, the goods may collide with the water spray nozzles during the lifting process, resulting in damage to the nozzles and inability to work properly. If a protective ring is added around the water spray nozzles, the problem that the goods may collide with the water spray nozzles during the lifting process can be solved, but the presence of the protective ring will prevent the formation of the water spray curtain, resulting in the inability to effectively protect the cargo hold bulkhead when a fire breaks out in the open cargo hold. If the upper half of the protective ring is retained and the lower half is removed, the protective ring will not prevent the formation of the water spray curtain. However, the goods may still collide with the water spray nozzles during the upward lifting process.

[0003] Therefore, there is an urgent need for a protection structure for a water spray nozzle in an open cargo hold of a ship to solve the above problems. Summary of the Invention

[0004] The purpose of the present invention is to provide a protection structure for a water spray nozzle in an open cargo hold of a ship, which can prevent the goods from colliding with the water spray nozzle during the lifting process and will not prevent the formation of the spray curtain when a fire breaks out inside the cargo hold.

[0005] To achieve this purpose, the present invention adopts the following technical solutions:

[0006] A protection structure for a water spray nozzle in an open cargo hold of a ship includes a fixing member, a moving member, a spring, and a single-acting hydraulic cylinder;

[0007] The fixing member is fixedly arranged on the cargo hold bulkhead, with one end extending into the cargo hold and the other end passing through the cargo hold bulkhead and extending outside the cargo hold. The moving member is slidably arranged inside the fixing member. The nozzle is exposed at one end of the fixing member extending into the cargo hold. The spray water pipe passes through the moving member and is connected to the nozzle. The moving member has a first position and a second position. When the moving member is in the first position, the nozzle is located inside the moving member. When the moving member is in the second position, the nozzle is exposed outside the moving member;

[0008] The spring connects the fixed part and the moving part. The single-acting hydraulic cylinder includes a cylinder body and a piston rod. The cylinder body is fixed to the fixed part. The piston rod has a third position and a fourth position. When the piston rod is at the third position and the moving part is at the first position, the piston rod abuts against the moving part to make the moving part stay at the first position. When the piston rod is at the fourth position, the spring can drive the moving part at the first position to move to the second position. The liquid inlet of the single-acting hydraulic cylinder is communicated with a spray water pipe. When spray water is introduced into the spray water pipe, the spray water can enter the single-acting hydraulic cylinder to make the piston rod of the single-acting hydraulic cylinder move from the third position to the fourth position.

[0009] As an improvement of the above technical solution, the fixed part includes a first cylinder body and a first bottom plate. The first cylinder body has a first end and a second end. The first end of the first cylinder body penetrates through the cargo hold wall and is fixed to the cargo hold wall. The second end of the first cylinder body is located outside the cargo hold. The first bottom plate covers the second end of the first cylinder body. A first through hole is provided on the bottom plate, and the spray water pipe passes through the first through hole.

[0010] As an improvement of the above technical solution, the moving part includes a second cylinder body, a third cylinder body and a second bottom plate. The second cylinder body is slidably arranged in the first cylinder body. The second cylinder body has a third end close to the first bottom plate and a fourth end far from the first bottom plate. The second bottom plate covers the third end of the second cylinder body. The third cylinder body has a fifth end close to the second bottom plate and a sixth end far from the second bottom plate. The fifth end of the third cylinder body is inserted into the fourth end of the second cylinder body and is fixedly connected to the fourth end of the second cylinder body. When the moving part is at the first position, the second cylinder body is located in the first cylinder body.

[0011] As an improvement of the above technical solution, the first cylinder body, the second cylinder body and the third cylinder body are all round tubes. The outer diameter of the second cylinder body is not greater than the inner diameter of the first cylinder body, and the outer diameter of the third cylinder body is not greater than the inner diameter of the second cylinder body.

[0012] As an improvement of the above technical solution, the spring connects the first bottom plate and the second bottom plate.

[0013] As an improvement of the above technical solution, it further includes a handle arranged in the third cylinder body, and the handle is fixedly connected to the inner wall of the third cylinder body.

[0014] As an improvement of the above technical solution, the fixing member further includes a fourth cylinder body, the fourth cylinder body is disposed within the first cylinder body, and one end thereof is fixedly connected to the first bottom plate. The moving member further includes a fifth cylinder body and a limiting block. One end of the fifth cylinder body is fixed to the second bottom plate, and the other end is located outside the second cylinder body. The limiting block is sleeved on one end of the fifth cylinder body located outside the second cylinder body and is slidably disposed within the fourth cylinder body. The limiting block is fixedly connected to the fifth cylinder body. The fourth cylinder body, the fifth cylinder body, the third cylinder body, the second cylinder body, and the first cylinder body are all coaxially disposed. When the piston rod is located at the third position, the piston rod abuts against one side of the limiting block close to the first bottom plate.

[0015] As an improvement of the above technical solution, the axis of the piston rod is perpendicular to the axis of the fifth cylinder body. An abutting plane is provided at one end of the piston rod away from the cylinder block. The abutting plane is disposed on one side of the piston rod close to the second bottom plate and is perpendicular to the axis of the first cylinder body. When the moving member is located at the first position, the side surface of the limiting block close to the first bottom plate abuts against the abutting plane.

[0016] As an improvement of the above technical solution, an abutting inclined surface is further provided at one end of the piston rod away from the cylinder block. The abutting inclined surface is disposed on one side of the piston rod close to the first bottom plate. The abutting inclined surface is disposed at an angle with the axis of the piston rod. Along the direction from the end of the piston rod away from the cylinder block to the end of the piston rod close to the cylinder block, the abutting inclined surface inclines towards the direction close to the first bottom plate.

[0017] When the piston rod is located at the third position and the moving member moves from the second position to the first position, the limiting block can abut against the abutting inclined surface.

[0018] As an improvement of the above technical solution, an abutting arc surface is provided on one side of the top end of the limiting block close to the second bottom plate. When the piston rod is located at the third position and the moving member moves from the second position to the first position, the abutting arc surface can abut against the abutting inclined surface.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] The water spray nozzle protection structure for the open cargo hold of a ship according to the present invention, in the normal state, the moving member is located at the first position, and the piston rod of the single-acting hydraulic cylinder is located at the third position to limit the moving member located at the first position and prevent it from moving towards the second position. At this time, the nozzle is located inside the moving member, and the moving member can play a role in shielding and protecting the nozzle to prevent the nozzle from being collided during the cargo handling process. When a fire breaks out inside the cargo hold and it is necessary to spray a water curtain into the cargo hold through the nozzle to protect the cargo hold wall, the spray water pipe is filled with spray water, and the spray water reaches the nozzle through the spray water pipe. After the spray water pipe is filled with spray water, the water in the spray water pipe will also reach the single-acting hydraulic cylinder. Under the action of the spray water pressure, the piston rod of the single-acting hydraulic cylinder moves from the third position to the fourth position. At this time, the spring in the stretched state drives the moving member to move from the first position to the second position, so that the nozzle is exposed outside the moving member, avoiding the moving member from affecting the spraying of the water curtain by the nozzle. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic diagram of the water spray nozzle protection structure for the open cargo hold of a ship provided by an embodiment of the present invention;

[0022] Figure 2 is Figure 1 the cross-section at A-A in Figure 1 (the moving member is located at the first position and the piston rod is located at the third position);

[0023] Figure 3 is Figure 1 the cross-section at B-B in Figure 1 (the moving member is located at the first position and the piston rod is located at the third position);

[0024] Figure 4 is Figure 3 the partial enlarged view at C in

[0025] Figure 5 is Figure 1 the cross-section at A-A in Figure 2 (the moving member is located at the second position and the piston rod is located at the fourth position);

[0026] Figure 6 is Figure 1 the cross-section at B-B in Figure 2 (the moving member is located at the second position and the piston rod is located at the fourth position);

[0027] Figure 7 is a schematic diagram of the structure of the single-acting hydraulic cylinder of the water spray nozzle protection structure for the open cargo hold of a ship provided by an embodiment of the present invention;

[0028] Figure 8 is a partial enlarged view of the water spray nozzle protection structure for the open cargo hold of a ship provided by an embodiment of the present invention when the abutting arc surface of the limiting block abuts against the abutting plane of the piston rod.

[0029] In the figure:

[0030] 1. Fixing member; 11. First cylinder; 12. First base plate; 13. Fourth cylinder;

[0031] 2. Moving member; 21. Second cylinder; 22. Third cylinder; 23. Second base plate; 24. Fifth cylinder; 25. Limiting block; 251. Abutting arc surface;

[0032] 3. Spring;

[0033] 4. Single-acting hydraulic cylinder; 41. Cylinder block; 42. Piston rod; 421. Abutting plane; 422. Abutting inclined plane; 43. Piston; 44. Return spring; 45. Hydraulic cavity; 46. Cavity;

[0034] 5. Connecting bolt;

[0035] 6. Handle;

[0036] 7. Copper pipe;

[0037] 10. Sprinkler head; 20. Spraying water pipe;

[0038] 100. Cargo hold wall. Specific implementation manners

[0039] The following combines the accompanying drawings and embodiments to further describe in detail the specific implementation manners of the present invention. The following embodiments are used to illustrate the present invention, but are not used to limit the scope of the present invention.

[0040] In the description of the present invention, unless otherwise clearly defined and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0041] In the present invention, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include that the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "above", and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "below", and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only means that the horizontal height of the first feature is less than that of the second feature.

[0042] In the description of this embodiment, the orientation or positional relationships such as "upper", "lower", "right", etc. are based on the orientation or positional relationships shown in the drawings. It is only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0043] As Figures 1-7 shown, this embodiment provides a water spray nozzle protection structure for an open cargo hold of a ship, including a fixing member 1, a moving member 2, a spring 3 and a single-acting hydraulic cylinder 4. The fixing member 1 is fixedly arranged on the cargo hold wall 100, with one end extending into the cargo hold and the other end passing through the cargo hold wall 100 and extending outside the cargo hold. The moving member 2 is slidably arranged within the fixing member 1. The nozzle 10 is exposed at one end of the fixing member 1 extending into the cargo hold. The spray water pipe 20 passes through the moving member 2 and is connected to the nozzle 10. The moving member 2 has a first position and a second position. When the moving member 2 is in the first position, the nozzle 10 is located within the moving member 2. When the moving member 2 is in the second position, the nozzle 10 is exposed outside the moving member 2. The spring 3 connects the fixing member 1 and the moving member 2, and the spring 3 extends along the direction parallel to the axis of the fixing member 1. When the moving member 2 is in the first position, the spring 3 is in a stretched state. The single-acting hydraulic cylinder 4 includes a cylinder block 41 and a piston rod 42. The cylinder block 41 is fixed on the fixing member 1. The piston rod 42 has a third position and a fourth position. When the piston rod 42 is in the third position and the moving member 2 is in the first position, the piston rod 42 abuts against the moving member 2 to make the moving member 2 stay in the first position. When the piston rod 42 is in the fourth position, the spring 3 can drive the moving member 2 in the first position to move to the second position. The liquid inlet of the single-acting hydraulic cylinder 4 is communicated with the spray water pipe 20. When spray water is introduced into the spray water pipe 20, the spray water can enter the single-acting hydraulic cylinder 4 to make the piston rod 42 of the single-acting hydraulic cylinder 4 move from the third position to the fourth position.

[0044] In the water spray nozzle protection structure for the open cargo hold of a ship provided in this embodiment, under normal conditions, the moving member 2 is located at the first position, and the piston rod 42 of the single-acting hydraulic cylinder 4 is located at the third position to limit the moving member 2 located at the first position and prevent it from moving towards the second position. At this time, the nozzle 10 is located inside the moving member 2, and the moving member 2 can play a role in shielding and protecting the nozzle 10 to avoid the nozzle 10 being collided during the cargo lifting process. When a fire breaks out inside the cargo hold and it is necessary to spray a water curtain into the cargo hold through the nozzle 10 to protect the cargo hold wall 100, the spray water pipe 20 is filled with spray water. The spray water reaches the nozzle 10 through the spray water pipe 20. After the spray water pipe 20 is filled with spray water, the water in the spray water pipe 20 will also reach the single-acting hydraulic cylinder 4. Under the action of the spray water pressure, the piston rod 42 of the single-acting hydraulic cylinder 4 moves from the third position to the fourth position. At this time, the spring 3 in the stretched state drives the moving member 2 to move from the first position to the second position, so that the nozzle 10 is exposed outside the moving member 2, avoiding the moving member 2 from affecting the spraying of the water curtain by the nozzle 10.

[0045] Optionally, as Figures 1-6 shown, the fixing member 1 includes a first cylinder body 11 and a first bottom plate 12. The first cylinder body 11 has a first end and a second end. The first end of the first cylinder body 11 penetrates the cargo hold wall 100 and is fixed to the cargo hold wall 100. The second end of the first cylinder body 11 is located outside the cargo hold. The first bottom plate 12 covers the second end of the first cylinder body 11. A first through hole is provided on the first bottom plate 12, and the spray water pipe 20 passes through the first through hole. In this embodiment, the first bottom plate 12 is fixedly welded to the first cylinder body 11.

[0046] Optionally, as Figures 1-6As shown, the moving member 2 includes a second cylinder body 21, a third cylinder body 22, and a second bottom plate 23. The second cylinder body 21 is slidably disposed within the first cylinder body 11. The second cylinder body 21 has a third end close to the first bottom plate 12 and a fourth end away from the first bottom plate 12. The second bottom plate 23 covers the third end of the second cylinder body 21. In this embodiment, the second bottom plate 23 is fixedly welded to the second cylinder body 21. The third cylinder body 22 has a fifth end close to the second bottom plate 23 and a sixth end away from the second bottom plate 23. The fifth end of the third cylinder body 22 is inserted into the fourth end of the second cylinder body 21 and is fixedly connected to the fourth end of the second cylinder body 21. In this embodiment, the second cylinder body 21 is fixedly welded to the third cylinder body 22. When the moving member 2 is in the first position, the second cylinder body 21 is within the first cylinder body 11, preventing the second cylinder body 21 from being directly impacted by the goods. Moreover, the third cylinder body 22 is inserted into the fourth end of the second cylinder body 21 and fixedly connected to the second cylinder body 21, which not only improves the structural strength of the third cylinder body 22 but also reduces the impact on the second cylinder body 21 when the third cylinder body 22 is deformed by the impact of the goods, preventing the second cylinder body 21 from being deformed too much and unable to slide relative to the first cylinder body 11, ensuring that when a fire occurs in the cargo hold, the moving member 2 can smoothly move to the second position. The first cylinder body 11 serves as a guiding slideway for the second cylinder body 21.

[0047] In this embodiment, as Figures 1-6 shown, the first cylinder body 11, the second cylinder body 21, and the third cylinder body 22 are all circular tubes. The outer diameter of the second cylinder body 21 is not greater than the inner diameter of the first cylinder body 11, enabling the second cylinder body 21 to slide relative to the first cylinder body 11. The outer diameter of the third cylinder body 22 is not greater than the inner diameter of the second cylinder body 21, enabling the third cylinder body 22 to be inserted into the second cylinder body 21. In this embodiment, the outer diameter of the second cylinder body 21 is smaller than the inner diameter of the first cylinder body 11, making it easier for the second cylinder body 21 to slide relative to the first cylinder body 11. The outer diameter of the third cylinder body 22 is smaller than the inner diameter of the second cylinder body 21, facilitating the smooth insertion of the third cylinder body 22 into the second cylinder body 21.

[0048] Optionally, as Figures 2-6 shown, the spring 3 connects the first bottom plate 12 and the second bottom plate 23. Both the first bottom plate 12 and the second bottom plate 23 are perpendicular to the axial direction of the first cylinder body 11, and the first bottom plate 12 and the second bottom plate 23 are disposed opposite to each other. One end of the spring 3 is connected to the first bottom plate 12, and the other end is connected to the second bottom plate 23, facilitating the elastic force of the spring 3 to drive the first cylinder body 11.

[0049] Furthermore, the water spray nozzle protection structure for the open cargo hold of a ship provided in this embodiment further includes a first fixing plate and a second fixing plate. One end of the spring 3 is fixedly provided with the first fixing plate, and the other end is fixedly provided with the second fixing plate. The first fixing plate is fixedly connected to the first bottom plate 12, and the second fixing plate is fixedly connected to the second bottom plate 23. In this embodiment, the first fixing plate is welded and fixed to one end of the spring 3, and the second fixing plate is welded and fixed to the other end of the spring 3. By providing the first fixing plate and the second fixing plate, it is convenient to connect the spring 3 with the first bottom plate 12 and the second bottom plate 23.

[0050] Furthermore, as Figure 2 , Figure 3 , Figure 5 and Figure 6 shown, the water spray nozzle protection structure for the open cargo hold of a ship provided in this embodiment further includes a plurality of connecting bolts 5. The first fixing plate and the first bottom plate 12, and the second fixing plate and the second bottom plate 23 are both connected by the connecting bolts 5. In this embodiment, threaded holes are provided on both the first fixing plate and the second fixing plate. The bolts connecting the first fixing plate and the first bottom plate 12 pass through the first bottom plate 12 and are threadedly connected to the first fixing plate, and the bolts connecting the second fixing plate and the second bottom plate 23 pass through the second bottom plate 23 and are threadedly connected to the second fixing plate.

[0051] Furthermore, as Figure 2 , Figure 3 , Figure 5 and Figure 6 shown, a plurality of springs 3 are provided. The plurality of springs 3 are arranged at intervals around the axis of the first cylinder 11. The first fixing plate and the second fixing plate are both arranged in one-to-one correspondence with the springs 3. When the springs 3 drive the first cylinder 11 to move from the first position to the second position, the second bottom plate 23 is uniformly stressed, avoiding jamming of the moving part 2 due to uneven stress.

[0052] Optionally, as Figure 2 , Figure 3 , Figure 5 and Figure 6 shown, the water spray nozzle protection structure for the open cargo hold of a ship provided in this embodiment further includes a handle 6 arranged inside the third cylinder 22. The handle 6 is fixedly connected to the inner wall of the third cylinder 22. For the moving part 2 in the second position, the operator can pull out the moving part 2 along the axial direction of the first cylinder 11 through the handle 6, so that the moving part 2 moves to the first position. When the moving part 2 reaches the first position, the piston rod 42 of the single-acting hydraulic cylinder 4 automatically resets, and the piston rod 42 reaches the third position. At this time, the piston rod 42 limits the moving part 2 to make the moving part 2 stay in the first position to protect the nozzle 10.

[0053] Optionally, as Figure 2 , Figure 3 ,Figure 5 and Figure 6 As shown in Figure 6 , the fixing member 1 further includes a fourth cylinder 13, the fourth cylinder 13 is disposed within the first cylinder 11, and one end thereof is fixedly connected to the first bottom plate 12. The moving member 2 further includes a fifth cylinder 24 and a limiting block 25. One end of the fifth cylinder 24 is fixed to the second bottom plate 23, and the other end is located outside the second cylinder 21. The limiting block 25 is sleeved on one end of the fifth cylinder 24 located outside the second cylinder 21 and is slidably disposed within the fourth cylinder 13. The limiting block 25 is fixedly connected to the fifth cylinder 24. In this embodiment, the limiting block 25 is fixedly welded to the fifth cylinder 24. The fourth cylinder 13, the fifth cylinder 24, the third cylinder 22, the second cylinder 21, and the first cylinder 11 are all coaxially disposed. When the piston rod 42 is in the third position, the piston rod 42 abuts against one side of the limiting block 25 close to the first bottom plate 12. When it is necessary to protect the nozzle 10, the limiting block 25 cooperates with the piston rod 42 to fix the moving member 2 in the first position. In this embodiment, the cylinder block 41 of the single-acting hydraulic cylinder 4 is fixed to the fourth cylinder 13. The water spray nozzle protection structure for the open cargo hold of a ship in this embodiment further includes a copper pipe 7. The liquid inlet of the single-acting hydraulic cylinder 4 is communicated with the spray water pipe 20 through the copper pipe 7. The fourth cylinder 13 is used as a guiding slideway for the limiting block 25 and is used to fix the cylinder block 41 of the single-acting hydraulic cylinder 4.

[0054] Optionally, as Figure 3 、 Figure 4 and Figure 6 As shown in Figure 3 , Figure 4 , and Figure 6 , the axis of the piston rod 42 is perpendicular to the axis of the fifth cylinder 24. One end of the piston rod 42 away from the cylinder block 41 is provided with an abutting plane 421. The single-acting hydraulic cylinder 4 is disposed between the first bottom plate 12 and the second bottom plate 23. The abutting plane 421 is disposed on one side of the piston rod 42 close to the second bottom plate 23. The abutting plane 421 is perpendicular to the axis of the first cylinder 11. When the moving member 2 is in the first position, the side surface of the limiting block 25 close to the first bottom plate 12 abuts against the abutting plane 421. The abutting plane 421 perpendicular to the axis of the first cylinder 11 abuts against the side surface of the limiting block 25 close to the first bottom plate 12, and the abutting plane 421 fits with the side surface of the limiting block 25, so that the force exerted by the limiting block 25 on the abutting plane 421 is perpendicular to the axial direction of the piston rod 42, thereby preventing the force exerted by the limiting block 25 on the piston rod 42 from causing the piston rod 42 to retract and ensuring that the moving member 2 stably stays in the first position.

[0055] Optionally, as Figure 3 、 Figure 4 、 Figure 6 and Figure 7As shown, at one end of the piston rod 42 away from the cylinder block 41, there is also provided an abutting inclined surface 422. The abutting inclined surface 422 is arranged on the side of the piston rod 42 close to the first bottom plate 12. The abutting inclined surface 422 is arranged at an angle with the axis of the piston rod 42. Along the direction from the end of the piston rod 42 away from the cylinder block 41 to the end of the piston rod 42 close to the cylinder block 41, the abutting inclined surface 422 inclines towards the direction close to the first bottom plate 12. The piston rod 42 is in the third position, and when the moving member 2 moves from the second position to the first position (that is, during the moving process), the limiting block 25 can abut against the abutting inclined surface 422. When the operator pulls the moving member 2 from the second position to the first position through the handle 6, when the limiting block 25 moves to the position of the piston rod 42, the limiting block 25 abuts against the abutting inclined surface 422, so that the force exerted by the limiting block 25 on the abutting inclined surface 422 can drive the piston rod 42 to retract, so that the piston rod 42 will not hinder the movement of the moving member 2 from the second position to the first position.

[0056] Further, as Figure 8 shown, on one side of the top end of the limiting block 25 close to the second bottom plate 23, there is provided an abutting arc surface 251. The piston rod 42 is in the third position, and when the moving member 2 moves to the position of the piston rod 42 from the second position, the abutting arc surface 251 abuts against the abutting inclined surface 422. In this embodiment, the abutting arc surface 251 is an arc surface, and the axis of the abutting arc surface 251 is perpendicular to the axis of the first cylinder 11. The axis of the abutting arc surface 251 surrounds the fifth cylinder 24. By providing the abutting arc surface 251, during the process of the moving member 2 moving from the second position to the first position, when the limiting block 25 moves to the position of the piston rod 42, the force exerted by the limiting block 25 on the piston rod 42 can better drive the piston rod 42 to retract, further facilitating the operator to move the moving member 2 from the second position to the first position.

[0057] Optionally, as Figure 7 shown, the single-acting hydraulic cylinder 4 further includes a piston 43 and a return spring 44. The cylinder block 41 is provided with an inner cavity. The piston 43 is arranged in the inner cavity. One end of the piston rod 42 extends outside the cylinder block 41, and the other end extends into the cylinder block 41 and is fixedly connected to the piston 43. The piston 43 divides the inner cavity into a hydraulic cavity 45 and a cavity 46. The return spring 44 is arranged in the cavity 46. The hydraulic cavity 45 is arranged at one end of the cylinder block 41 close to the fifth cylinder 24, and the cavity 46 is arranged at one end of the cylinder block 41 away from the fifth cylinder 24. The hydraulic cavity 45 is communicated with the spray water pipe 20, and the cavity 46 is communicated with the atmosphere outside the single-acting hydraulic cylinder 4. Those skilled in the art can understand that the return spring 44 is used for the reset of the piston rod 42. When the spray water pipe 20 stops supplying spray water, the return spring 44 drives the piston 43 to drive the piston rod 42 to move from the fourth position to the third position until it is reset to the third position.

[0058] The water spray nozzle protection structure for the open cargo hold of the ship provided in this embodiment solves the problem that the goods may collide with the water spray nozzle 10 during the lifting process. Moreover, the water spray nozzle protection structure for the open cargo hold of the ship does not prevent the formation of the spray water curtain and effectively protects the cargo hold wall 100 when the open cargo hold catches fire. The power source of the single-acting hydraulic cylinder 4 is the water pressure of the spray water, and there is no need to additionally add a liquid supply system for the single-acting hydraulic cylinder 4.

[0059] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and substitutions can still be made, and these improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A water spray nozzle protection structure for an open cargo hold of a ship, characterized in that: It includes fixed parts, moving parts, springs and single-acting hydraulic cylinders; The fixing member is fixedly arranged on the cargo hold wall, and one end of the fixing member extends into the cargo hold, and the other end of the fixing member extends through the cargo hold wall to the outside of the cargo hold. The movable member is slidably arranged in the fixing member, and the nozzle is exposed at one end of the fixing member extending into the cargo hold. The spray water pipe passes through the movable member and is connected with the nozzle. The movable member has a first position and a second position. When the movable member is in the first position, the nozzle is located in the movable member. When the movable member is in the second position, the nozzle is exposed at the movable member. The spring connects the fixed part and the movable part, the single-acting hydraulic cylinder includes a cylinder body and a piston rod, the cylinder body is fixed on the fixed part, the piston rod has a third position and a fourth position, when the piston rod is located at the third position and the movable part is located at the first position, the piston rod abuts against the movable part so that the movable part stays at the first position, when the piston rod is located at the fourth position, the spring can drive the movable part located at the first position to move to the second position, the liquid inlet of the single-acting hydraulic cylinder is connected to the spray water pipe, when spray water is introduced into the spray water pipe, the spray water can enter the single-acting hydraulic cylinder, so that the piston rod of the single-acting hydraulic cylinder moves from the third position to the fourth position.

2. The ship open cargo hold water spray nozzle protection structure according to claim 1, characterized in that: The fixing member includes a first cylinder and a first bottom plate, the first cylinder having a first end and a second end, the first end of the first cylinder passing through the cargo hold wall and being fixed on the cargo hold wall, the second end of the first cylinder being located outside the cargo hold, the first bottom plate covering the second end of the first cylinder, a first through hole being provided on the bottom plate, and the spray water pipe passing through the first through hole.

3. The ship open cargo hold water spray nozzle protection structure according to claim 2 is characterized in that: The movable member includes a second cylinder, a third cylinder and a second bottom plate, the second cylinder is slidably arranged in the first cylinder, the second cylinder has a third end close to the first bottom plate and a fourth end away from the first bottom plate, the second bottom plate is covered on the third end of the second cylinder, the third cylinder has a fifth end close to the second bottom plate and a sixth end away from the second bottom plate, the fifth end of the third cylinder is inserted into the fourth end of the second cylinder and fixedly connected to the fourth end of the second cylinder, and when the movable member is located at the first position, the second cylinder is located in the first cylinder.

4. The ship open cargo hold water spray nozzle protection structure according to claim 3 is characterized in that: The first cylinder, the second cylinder and the third cylinder are all circular tubes, the outer diameter of the second cylinder is not greater than the inner diameter of the first cylinder, and the outer diameter of the third cylinder is not greater than the inner diameter of the second cylinder.

5. The ship open cargo hold water spray nozzle protection structure according to claim 4, characterized in that: The spring connects the first bottom plate and the second bottom plate.

6. The ship open cargo hold water spray nozzle protection structure according to claim 3, characterized in that: It also includes a handle disposed in the third cylinder, and the handle is fixedly connected to the inner wall of the third cylinder.

7. The ship open cargo hold water spray nozzle protection structure according to claim 4, characterized in that: The fixing member also includes a fourth cylinder, which is arranged in the first cylinder and has one end fixedly connected to the first bottom plate. The moving member also includes a fifth cylinder and a limit block. One end of the fifth cylinder is fixed to the second bottom plate, and the other end is located on the outside of the second cylinder. The limit block is sleeved on one end of the fifth cylinder located on the outside of the second cylinder and is slidably arranged in the fourth cylinder. The limit block is fixedly connected to the fifth cylinder. The fourth cylinder, the fifth cylinder, the third cylinder, the second cylinder and the first cylinder are all coaxially arranged. When the piston rod is in the third position, the piston rod abuts against a side of the limit block close to the first bottom plate.

8. The ship open cargo hold water spray nozzle protection structure according to claim 7, characterized in that: The axis of the piston rod is perpendicular to the axis of the fifth cylinder, and an abutment plane is provided at the end of the piston rod away from the cylinder body. The abutment plane is provided on the side of the piston rod close to the second bottom plate, and the abutment plane is perpendicular to the axis of the first cylinder. When the movable part is located at the first position, the side of the limit block close to the first bottom plate abuts against the abutment plane.

9. The ship open cargo hold water spray nozzle protection structure according to claim 8, characterized in that: The end of the piston rod away from the cylinder body is also provided with an abutment slope, the abutment slope is provided on the side of the piston rod close to the first bottom plate, the abutment slope is provided at an angle with the axis of the piston rod, and along the direction from the end of the piston rod away from the cylinder body to the end of the piston rod close to the cylinder body, the abutment slope is inclined in the direction close to the first bottom plate; When the piston rod is located at the third position and the moving member moves from the second position to the first position, the limit block can abut against the abutting inclined surface.

10. The ship open cargo hold water spray nozzle protection structure according to claim 9, characterized in that: A contact arc surface is provided on one side of the top of the limit block close to the second bottom plate. When the piston rod is located at the third position and the moving member moves from the second position to the first position, the contact arc surface can contact the contact inclined surface.

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