Overlapped sliding combined type hatch cover device

Abstract

The invention discloses an overlapping and sliding combined type hatch cover device which comprises a hatch track and cover plates covering a hatch, and the cover plates comprise a power cover plate and an unpowered cover plate. The power cover plate is provided with wheels, and the wheels walk on the hatch track; the position of the unpowered cover plate is lifted through the lifting device, and the unpowered cover plate is matched with the movement of the powered cover plate, so that the two cover plates are overlapped; the two opposite side edges of the unpowered cover plate are each provided with at least two lifting arms stretching out in the side direction, and the lifting devices are arranged on the ship deck and correspond to the lifting arms. According to the overlapping and sliding combined type hatch cover device, the unpowered cover plate is jacked, then the powered cover plate is moved to the position below the unpowered cover plate, and then the unpowered cover plate falls on the powered cover plate to form an overlapping arrangement hatch opening mode, so that opening of the hatch is achieved, and the height space above the hatch cannot be occupied; and the crane can conveniently rotate to hoist goods.

Description

Technical Field

[0001] The invention relates to the technical field of ship structures, and in particular to a superimposed sliding combined hatch cover device. Background Art

[0002] Bulk carriers are commercial ships specially designed to transport unpackaged bulk cargo such as ore, coal, grain, etc. This type of ship is characterized by large cargo holds, which are distributed from front to back on the ship and can be divided into multiple mutually separated cargo holds. Square hatches corresponding to the cargo holds are provided on the deck, and hatch covers are provided on the hatches. The hatch covers are movable structures installed on the hull deck and used to cover the hatches. They are used to prevent seawater, rainwater, etc. from entering the cargo hold to ensure that the cargo is dry and safe; maintain the integrity of the hull during navigation to prevent the influx of seawater and cause the ship to lose buoyancy.

[0003] At present, conventional hatch covers are generally sliding hatch covers, which are usually composed of multiple cover plates, which can slide on tracks to open or close the hatch. They are usually provided with guide rails on opposite sides of the hatch, and wheels are provided on both sides of the cover plates, which are arranged on the guide rails on both sides so that the cover plates can move along the guide rails. However, in this sliding hatch opening method, both ends of the track must have an empty guide rail at least as long as the side length of the wheel side of the cover plate to allow the hatch to open to a sufficiently large opening. When the cover plate needs to be opened, the cover plate is slid onto the empty guide rail for placement, and then the hatch is opened. The defect is that if the hatch is to be fully opened, an empty guide rail of sufficient length must be provided, and the empty guide rail occupies a large deck space, resulting in it occupying more of the originally limited deck space.

[0004] In order to solve the above problems, patent application number: CN201310731207.1 discloses a hatch cover opening and closing device. The hatch cover is composed of at least one pair of cover plates that are rotatably connected in sequence. The opening and closing device includes: a first drive device, one end of which is fixed to the hull, and the other end is rotatably connected to the first end of the first cover plate of the hatch cover; a rigid bracket, the first end of which is also fixed to the first end of the first cover plate; an arm lifting mechanism, the first end of which is rotatably connected to the second end of the rigid bracket; and a second drive device, one end of which is fixed to the hull, and the other end is rotatably connected to the middle part of the arm lifting mechanism. The hatch cover opening and closing device of the present invention can not only conveniently fold the hatch cover, but also does not occupy the hull space. Although it solves the problem of deck space occupation, the overall height increased after the cover plate is folded and erected affects the use of the crane on the side, and the overall stability of the hatch cover after folding and erecting is poor. If it is not fixed and firm, it is easy to roll over.

[0005] In view of the above, it is necessary to propose a superimposed sliding combined hatch cover device to solve the above problems. Summary of the invention

[0006] The purpose of the present invention is to overcome the defects in the prior art and provide a folding and sliding combined hatch cover device.

[0007] To achieve the above object, the technical solution of the present invention is as follows: a combined sliding hatch cover device, comprising: A hatch rail is arranged on the outer sides of each of a pair of mutually parallel side surfaces of the hatch in parallel with the side surfaces; A cover plate covering the hatch, the cover plate comprising a powered cover plate and a non-powered cover plate, the powered cover plate and the non-powered cover plate are sequentially arranged on the hatch to close it; the powered cover plate is provided with at least two wheels on each side of two side surfaces parallel to the hatch track, and the wheels run on the hatch track; the non-powered cover plate is raised by a lifting device and cooperates with the movement of the powered cover plate so that the two cover plates are overlapped; a cover moving device having a driving source for moving the powered cover in order to open and close the hatch; A lifting device, wherein at least two lifting arms extending laterally are respectively arranged on opposite sides of the unpowered cover plate, a lifting device is arranged on the ship deck corresponding to each lifting arm, and a deadweight alignment mechanism is arranged between the controllable lifting upper end of the lifting device and the lifting arm; The powered cover is provided with a cover lifting mechanism, which enables the powered cover to be lifted or lowered relative to the hatch by changing the relative height between the wheels and the cover.

[0008] Furthermore, the lifting device includes a main lifting rod, a main guide protection column, and a main hydraulic cylinder. The main guide protection column is vertically fixed on the side of the hatch, the main lifting rod is slidably arranged in the main guide protection column, the main hydraulic cylinder is arranged at the lower part of the main guide protection column and the main lifting rod, the free end of the main hydraulic cylinder abuts against the bottom end of the main lifting rod, and the upper end of the main lifting rod is provided with a support plate matching the lifting arm.

[0009] Furthermore, the self-weight alignment mechanism includes a secondary guide protection column, a secondary lifting rod, and a secondary hydraulic cylinder. A secondary guide protection column is fixedly provided on one side of the main guide protection column, and a secondary lifting rod is slidably provided in the secondary guide protection column. The secondary hydraulic cylinder is arranged below the secondary lifting rod, and the free end of the secondary hydraulic cylinder abuts against the lower end of the secondary lifting rod; a Y-shaped forked bracket is provided at the upper end of the secondary lifting rod, and an alignment protrusion matching the forked bracket is provided at the lower end of the lifting arm.

[0010] Furthermore, the cover plate lifting mechanism includes a main wheel support arm which can rotate freely and is arranged on one side of the powered cover plate, the wheel is rotatably arranged on the main wheel support arm, and a secondary wheel support arm is used to drive and limit the main wheel support arm, one end of the secondary wheel support arm is hinged to the main wheel support arm, and the other end is hinged to the slider shaft rod; a slider track is provided in the horizontal direction on the side surface of the powered cover plate, a slider body is slidably arranged in the slider track, and a slider shaft rod is provided on the slider body extending out of the slider track.

[0011] Furthermore, the cover plate lifting mechanism also includes a first support arm, a second support arm, and a push cylinder. The ends of the first support arm and the second support arm are hinged to form a deformable V-shaped hinged bending arm; the other end of the first support arm is hinged to the slider body, and the other end of the second support arm is hinged to the side wall of the powered cover plate. One end of the push cylinder is hinged to the side wall of the powered cover plate, and the other end is hinged to the hinge of the bending arm.

[0012] Furthermore, when the pushing cylinder extends and pushes the bending arm from a V-shape to a straight shape, the main supporting arm swings to control the height change of the wheel relative to the powered cover plate and raise the powered cover plate; when the first support arm and the second support arm are arranged in a straight line, they reach the dead point position, thereby positioning the wheel position.

[0013] Furthermore, when the first support arm and the second support arm are arranged in a straight line, there is a power cover plate with a fixed plate provided therebelow, a limit plate with adjustable height position provided above the fixed plate, an adjusting bolt is provided through a threaded connection of the fixed plate, and a limit plate is provided on the upper end of the adjusting bolt.

[0014] Furthermore, the cover plate moving device includes a hydraulic motor and a chain. The hydraulic motor drives the chains installed at the hatch tracks on both sides to operate. The side of the powered cover plate is provided with an arm, and the chain is connected to the arm.

[0015] The advantages and beneficial effects of the present invention are as follows: the present invention is a superimposed sliding combined hatch cover device, which is opened by lifting the unpowered cover plate, then moving the powered cover plate to the bottom of the unpowered cover plate, and then dropping the unpowered cover plate on the powered cover plate to form a superimposed placement. This not only realizes the opening of the hatch, but also does not occupy the height space above the hatch, so that the crane can conveniently rotate and hoist the cargo; and under the drive of the cover plate moving device, the two stacked cover plates can be moved together, so that all positions of the hatch can be opened, which is convenient for loading and unloading cargo. By setting up the self-weight alignment mechanism, the position of the unpowered cover plate can be accurately adjusted to avoid the gap between the cover plates being too large when the two cover plates are closed, so that the closing position of the unpowered cover plate is more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is an axonometric view of a superimposed sliding combined hatch cover device of the present invention; Figure 2 It is a schematic diagram of the sealing strip sealing the hatch when the cover plate is raised and lowered in the present invention; Figure 3 is a front view of the lifting device of the present invention; Figure 4 is a side view of the lifting device of the present invention; Figure 5 It is a schematic diagram of the cover plate lifting mechanism in the present invention controlling the wheels to support the powered cover plate; Figure 6 It is a schematic diagram of the cover lifting mechanism controlling the wheel retraction in the present invention; In the figure: 1. hatch rail; 2. hatch; 3. powered cover; 4. unpowered cover; 5. wheels; 6. lifting device; 7. lifting arm; 8. self-weight alignment mechanism; 9. cover lifting mechanism; 10. main lifting rod; 11. main guide protection column; 12. main hydraulic cylinder; 13. support plate; 14. auxiliary guide protection column; 15. auxiliary lifting rod; 16. auxiliary hydraulic cylinder; 17. forked bracket; 18. alignment protrusion; 19 , main support arm of wheel; 20, auxiliary support arm of wheel; 21, slider shaft; 22, slider track; 23, first support arm; 24, second support arm; 25, push cylinder; 26, bending arm; 27, fixing plate; 28, limit plate; 29, adjusting bolt; 30, hydraulic motor; 31, chain; 32, arm; 33, reinforcement plate; 34, rotating wheel; 35, fixing pin shaft; 36, upper sealing strip; 37, lower sealing strip. DETAILED DESCRIPTION

[0017] The specific implementation of the present invention is further described below in conjunction with the accompanying drawings and embodiments. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0018] A combined sliding hatch cover device, such as Figure 1 The figure shows a three-dimensional structural diagram of the hatch 2 cover device, in which a plurality of cargo holds are arranged on the cargo ship, and one or more hatches 2 are provided above the deck of the cargo hold, and two hatch 2 cover plates are provided on each hatch 2, respectively. In the embodiment, the cover plates include a powered cover plate 3 and an unpowered cover plate 4, and hatch 2 tracks 1 parallel to the sides are arranged on opposite sides of each hatch 2. It can be understood that the hatch 2 track 1 can be extended in the direction of the side or in the direction of the ship's central axis; further, the powered cover plate 3 and the unpowered cover plate 4 are arranged in sequence on the hatch 2 to close it; the powered cover plate 3 is provided with at least two wheels 5 on each single side on both side surfaces parallel to the hatch 2 track 1, as shown in FIG. Figure 1As shown, only two wheels 5 on one side of the powered cover plate 3 are shown, while the wheels 5 on the other side are not shown. The wheels 5 move on the track 1 of the hatch 2; the non-powered cover plate 4 is raised by the lifting device 6 and cooperates with the movement of the powered cover plate 3 to form a superimposed state; when the track 1 of the hatch 2 is extended and arranged in the side direction, the cover plates are guided by the wheels 5 and the track to make the two cover plates move horizontally in the side direction; when the track 1 of the hatch 2 is arranged in the direction of the ship's mid-axis, the two cover plates can move horizontally back and forth to open the hatch 2; The cover moving device has a driving source for moving the powered cover 3 in order to open and close the hatch 2; specifically, Figure 1 As shown, the cover moving device includes a hydraulic motor 30 and a chain 31. The hydraulic motor 30 drives the chain 31 installed at the track 1 of the hatch 2 on both sides to operate. The side of the powered cover 3 is provided with an arm 32, and the chain 31 is connected to the arm 32. The power of the powered cover 3 comes from the cover moving device, which drives the chains 31 installed on both sides along the track 1 of the hatch 2 through the hydraulic motor 30. The powered cover 3 is pulled to move along the track 1 of the hatch 2 through the operation of the chains 31 on both sides. The arm 32 on the side of the powered cover 3 is connected to the chain 31, as shown in FIG. Figure 1 Only one arm 32 is shown, and an arm 32 is also provided at a corresponding position on the other side of the powered cover plate 3, and is connected to the chain 31 on the other side. A plurality of cover plate support members are provided around the outer sides of the powered cover plate 3 and the non-powered cover plate 4, and these cover plate support members are used to support the cover plate at the upper limit position of the hatch 2 when the hatch 2 is closed.

[0019] Lifting device 6, such as Figure 1 , 3 4. At least two lifting arms 7 extending laterally are provided on opposite sides of the non-powered cover plate 4. Figure 1 As shown, two lifting arms 7 are provided on one side of the unpowered cover plate 4, and a lifting arm 7 (not shown in the figure) is also provided at a corresponding position on the other side opposite to it, and a lifting device 6 is provided on the ship deck corresponding to each lifting arm 7, as shown in FIG. Figure 3As shown, only the lifting device 6 at a lifting arm 7 arranged on the side of the unpowered cover plate 4 is schematically illustrated in the figure; specifically, the lifting device 6 includes a main lifting rod 10, a main guide protection column 11, and a main hydraulic cylinder 12. The main guide protection column 11 is a hollow cylindrical structure, and the part exposed on the deck is connected and fixed to the hatch 2 through a reinforcing plate 33, so as to improve the structural strength of the main guide protection column 11. The main guide protection column 11 is vertically fixed on the side of the hatch 2, and the main lifting rod 10 passes through the inside of the main guide protection column 11, and the main lifting rod 10 is slidably arranged in the main guide protection column 11, so that the main guide protection column 11 forms a lifting and sliding guide for the main lifting rod 10 to make it stably lift and slide, and the upper end of the main lifting rod 10 is provided with a supporting plate 13 matched with the lifting arm 7; as shown Figure 3 , 4 As shown, the main hydraulic cylinder 12 is arranged at the lower part of the main guide protection column 11 and the main lifting rod 10, and the free end of the main hydraulic cylinder 12 is abutted against the bottom end of the main lifting rod 10. The hydraulic cylinder is used as a driving force to control the extension and contraction of the cylinder rod so that the main lifting rod 10 extends out of the upper end of the main guide protection column 11. When the main lifting rod 10 extends upward, the support plate 13 at its top is supported on the lower side of the lifting arm 7. When the multiple lifting devices 6 around it simultaneously lift the lifting arm 7 upward, the unpowered cover plate 4 can be lifted. It can be understood that in this embodiment, the height to which the unpowered cover plate 4 needs to be lifted should be at least greater than The thickness of the powered cover plate 3 is then formed below the unpowered cover plate 4 to allow the powered cover plate 3 to enter; after the unpowered cover plate 4 is lifted, the powered cover plate 3 is pulled to the space below the unpowered cover plate 4 by the cover plate moving device. When the two covers overlap, the cylinder rod of the main hydraulic cylinder 12 is retracted to make the main lifting rod 10 fall, and then the unpowered cover plate 4 falls on the powered cover plate 3, so that the two covers form an overlapping state. Since the powered cover plate 3 is equipped with wheels 5, the two covers can be controlled to shift together under the pulling of the cover plate moving device.

[0020] It can be understood that the present embodiment can be provided with a shorter hatch 2 track 1. In the shortest case, the hatch 2 track 1 is made to be equivalent to the side length of the hatch 2, that is, at this time, no empty guide rails will extend out at both ends, thereby avoiding occupation of the deck space; the control method in this case is that the two cover plates respectively occupy half of the hatch 2 track 1. When opening the hatch 2, the unpowered cover plate 4 is first lifted up, and then the powered cover plate 3 is controlled to move to the bottom of the unpowered cover plate 4 so that the two overlap and then fall on the unpowered cover plate 4. At this time, half of the hatch 2 can be opened, and then the side of the hatch 2 can be loaded and unloaded; then the two cover plates are pulled to the other side of the hatch 2 by the cover plate moving device, and the other side of the hatch 2 is switched to open, and then the loading and unloading operations are carried out; it can be understood that this structure can open half of the hatch 2 at a time, and then perform rotation operations.

[0021] As another embodiment, compared with the previous embodiment, in this embodiment, the track 1 of the hatch 2 is extended at one end, and the extended length is the side length of the cover plate on the side where the wheel 5 is set. In this way, in this embodiment, there is an empty track extended only at one end of the track 1 of the hatch 2. Compared with the prior art of setting empty tracks at both ends, the occupied deck space can be greatly reduced; when this embodiment is used specifically, it is similar to the previous embodiment, first forming a form of overlapping and placing two cover plates, and then the two cover plates can be pulled simultaneously to the empty track set at one end and placed, so that the hatch 2 can be fully opened at one time.

[0022] As an improvement, a self-weight alignment mechanism 8 is provided between the controllable upper end of the lifting device 6 and the lifting arm 7; since the cover plate will inevitably deviate when it is closed on the hatch 2 again after moving left and right, and the sealing structure of the cover plate for the hatch 2 is as follows: Figure 2 As shown in the figure, A is a schematic diagram of the cover being lifted and moved; B is a schematic diagram of the cover falling on the hatch 2 to seal the hatch 2; it can be seen that in order to enhance the sealing effect, upper sealing strips are provided on the edges around the lower end surface of the cover, and lower sealing strips are provided around the hatch 2. When the cover falls, the upper and lower sealing strips squeeze each other to form a seal; after the cover moves, position deviation is likely to occur when returning to its original position. The powered cover 3 can be pulled for fine-tuning, while the unpowered cover 4 is more difficult to adjust; if there is a position deviation, the other two sides of the lifting arm 7 are likely to cause the sealing strip to shift, thereby deteriorating the sealing effect.

[0023] Specifically, in this embodiment, the self-weight alignment mechanism 8 is additionally provided with a secondary guide protection column 14, a secondary lifting rod 15, and a secondary hydraulic cylinder 16 on the basis of the previous embodiment. The secondary guide protection column 11 is fixedly provided with a secondary guide protection column 14 on one side, and a secondary lifting rod 15 is slidably provided in the secondary guide protection column 14. The secondary hydraulic cylinder 16 is arranged below the secondary lifting rod 15, and the free end of the secondary hydraulic cylinder 16 abuts against the lower end of the secondary lifting rod 15; Figure 3 , 4 As shown, in this embodiment, on the basis of the previous embodiment, a secondary lifting rod 15 is additionally arranged on one side of the main lifting rod 10, and its lifting principle is consistent with that of the main lifting rod 10. The plurality of secondary lifting rods 15 arranged around are simultaneously controlled to lift by the secondary hydraulic cylinder 16. The difference is that a Y-shaped forked bracket is provided at the upper end of the secondary lifting rod 15, and correspondingly, a aligning protrusion 18 cooperating with the forked bracket 17 is provided at the lower end of the lifting arm 7; in this embodiment, as shown in FIG. Figure 3As shown, the protrusion forms a triangular tip extending downward, and a rotating wheel 34 is provided on the lower tip. During specific use, the position of the auxiliary lifting rod 15 is accurate. When a slight error occurs when the unpowered cover plate 4 returns to its original position, the auxiliary lifting rod 15 is first lifted up, and the Y-shaped forked bracket 17 at its upper end is supported on the protrusion. When the unpowered cover plate 4 is lifted up, the protrusion contacts the forked bracket 17 through the rotating wheel 34 at the lower end, and thus slides to the lowest part of the forked bracket 17 under the action of its own weight, thereby forming a positioning effect for the unpowered cover plate 4, and then the unpowered cover plate 4 can be accurately returned to its original position when it is controlled to fall.

[0024] It is understandable that, during the specific production, the main lifting rod 10 or the auxiliary lifting rod 15 can be separately provided according to the specific situation, or Figure 3 , 4 Set simultaneously as shown.

[0025] Furthermore, a cover lifting mechanism 9 is provided on the powered cover 3 , and the cover lifting mechanism 9 enables the powered cover 3 to be lifted or lowered relative to the hatch 2 by changing the relative height between the wheels 5 and the cover.

[0026] like Figure 5 It is a schematic diagram showing that the wheel main support arm 19 rotates clockwise so that the wheel 5 supports the powered cover plate 3, and at this time the cover plate moving device can pull and shift it. Figure 6 The diagram shows that the wheel main support arm 19 rotates counterclockwise to make the wheel 5 leave the track 1 of the hatch 2, and at this time the powered cover plate 3 falls on the hatch 2 to seal. Specifically, the cover plate lifting mechanism 9 includes a wheel main support arm 19 that can rotate freely and is arranged on one side of the powered cover plate 3, the wheel 5 is rotatably arranged on the wheel main support arm 19, and a wheel auxiliary support arm 20 that drives and limits the wheel main support arm 19, one end of the wheel auxiliary support arm 20 is hinged to the wheel main support arm 19, and the other end is hinged to the slider shaft rod 21, as shown in FIG. Figure 5 As shown, the main wheel support arm 19 and the auxiliary wheel support arm 20 form a variable V-shaped structure, one end of the main wheel support arm 19 is a fixed pin shaft 35, so that it can swing around the fixed pin shaft 35, and the lower end of the main wheel support arm 19 is a pin shaft for mounting the wheel 5. In this embodiment, the auxiliary wheel support arm 20 is hingedly arranged on the pin shaft of the wheel 5 to form a V-shaped structure, and the auxiliary wheel support arm 20 and the wheel 5 are not on the same pin shaft, and the force arm length of the auxiliary wheel support arm 20 is appropriately increased, so that the rotation of the main wheel support arm 19 can be controlled more labor-savingly; Furthermore, a slider track 22 is provided on the side of the power cover plate 3 in the horizontal direction, a slider body is slidably provided in the slider track 22, and a slider shaft 21 is provided on the slider body extending out of the slider track 22. The pin shaft at the other end of the wheel auxiliary support arm 20 is the slider shaft 21 provided on the slider body, which shifts with the position movement of the slider body, so that the end of the wheel auxiliary support arm 20 is a movable end, so that the wheel 5 can form as shown in the figure. Figure 5 , 6 The lifting movement shown in the figure further supports the powered cover plate 3.

[0027] Furthermore, the cover lifting mechanism 9 also includes a first support arm 23, a second support arm 24, and a push cylinder 25. The ends of the first support arm 23 and the second support arm 24 are hinged to form a deformable V-shaped hinged bending arm 26. It can be understood that the movement of the slider body at the end of the wheel auxiliary support arm 20 is driven and controlled by the bending arm 26. In the process of extending the push cylinder 25 to push the bending arm 26 from a V shape to a straight shape, the main support arm swings to control the height change of the wheel 5 relative to the powered cover 3 and raise the powered cover 3. Specifically, when the two support arms are as Figure 5 When the two arm rods are in a straight line, that is, the bending arm 26 is extended, pushing the slider body to the left, at this time, the wheel 5 can be controlled to fall and prop up the cover plate; Figure 6 The inverted V-shaped bend shown in the figure, at this time, the distance between the two ends of the bending arm 26 is contracted, so that the slider body moves to the right, and the powered cover plate 3 falls to seal the hatch 2. Specifically, the other end of the first support arm 23 is hinged to the slider body. In this embodiment, the first support arm 23 and the wheel auxiliary adjustment arm are hingedly arranged on the same slider shaft 21, and can also be arranged separately. The other end of the second support arm 24 is hinged to another fixed pin 35 on the side wall of the powered cover plate 3, and this end of the second support arm 24 is a fixed point. The upper end of the push cylinder 25 is hinged to the fixed pin 35 on the upper side of the side wall of the powered cover plate 3, and the lower end is hinged to the hinge of the bending arm 26. When the push cylinder 25 is extended, it is formed as shown in the figure. Figure 5 In the state shown, the wheel 5 falls and the power cover plate 3 is lifted up; on the contrary, when the push cylinder 25 shrinks, as shown in FIG. Figure 6 As shown, at this time, the bending arm 26 is retracted and the wheel 5 is lifted.

[0028] Further, such as Figure 5As shown, when the first arm 23 and the second arm 24 are arranged in a straight line, they reach the dead point position, and the position of the wheel 5 is positioned. It can be understood that at this time, since the two support arms are arranged in a straight line, the support effect is the best, and the positioning effect of the slider body is the best, so that the stability of the position of the wheel 5 can be improved. Further, when the first arm 23 and the second arm 24 are arranged in a straight line, the power cover plate 3 is provided with a fixed plate 27 below it, and a limit plate 28 with adjustable height position is provided above the fixed plate 27, and an adjusting bolt 29 is threadedly connected through the fixed plate 27, and a limit plate 28 is provided on the upper end of the adjusting bolt 29. The limit plate 28 can prevent the fixed push cylinder from excessive action, thereby crossing the dead point position and weakening the positioning effect; so after adding the limit plate 28, the above-mentioned disadvantages can be avoided, and the position of the limit plate 28 can be fine-tuned up and down using the adjusting bolt 29, which is easy to control.

[0029] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A combined sliding hatch cover device, characterized in that: include: The hatch (2) rail (1) is arranged on the outer sides of a pair of mutually parallel side surfaces of the hatch (2) and in parallel with these side surfaces; A cover plate covering the hatch (2), the cover plate comprising a powered cover plate (3) and a non-powered cover plate (4), the powered cover plate (3) and the non-powered cover plate (4) being arranged in sequence on the hatch (2) to close it; the powered cover plate (3) is provided with at least two wheels (5) on each side of two side surfaces parallel to the track (1) of the hatch (2), and the wheels (5) travel on the track (1) of the hatch (2); the non-powered cover plate (4) is raised to a higher position by a lifting device (6) and cooperates with the movement of the powered cover plate (3) so that the two cover plates are formed into a superimposed state; A cover moving device having a driving source for moving the powered cover (3) in order to open and close the hatch (2); A lifting device (6), at least two lifting arms (7) extending laterally are respectively provided on opposite sides of the non-powered cover plate (4), a lifting device (6) is provided on the ship deck corresponding to each lifting arm (7), and a self-weight alignment mechanism (8) is provided between the controllably elevating upper end of the lifting device (6) and the lifting arm (7); The powered cover plate (3) is provided with a cover plate lifting mechanism (9), and the cover plate lifting mechanism (9) causes the powered cover plate (3) to be lifted or lowered relative to the hatch (2) by changing the relative height between the wheel (5) and the cover plate.

2. The folding and sliding combined hatch cover device according to claim 1, characterized in that: The lifting device (6) comprises a main lifting rod (10), a main guide protection column (11), and a main hydraulic cylinder (12); the main guide protection column (11) is vertically fixedly arranged on the side of the hatch (2); the main lifting rod (10) is slidably arranged in the main guide protection column (11); the main hydraulic cylinder (12) is arranged at the lower part of the main guide protection column (11) and the main lifting rod (10); the free end of the main hydraulic cylinder (12) abuts against the bottom end of the main lifting rod (10); and the upper end of the main lifting rod (10) is provided with a support plate (13) that matches the lifting arm (7).

3. The folding and sliding combined hatch cover device according to claim 2, characterized in that: The self-weight alignment mechanism (8) comprises a secondary guide protection column (14), a secondary lifting rod (15), and a secondary hydraulic cylinder (16); the secondary guide protection column (14) is fixedly provided on one side of the main guide protection column (11); the secondary lifting rod (15) is slidably provided inside the secondary guide protection column (14); the secondary hydraulic cylinder (16) is arranged below the secondary lifting rod (15); the free end of the secondary hydraulic cylinder (16) abuts against the lower end of the secondary lifting rod (15); the upper end of the secondary lifting rod (15) is provided with a Y-shaped forked bracket; the lower end of the lifting arm (7) is provided with an alignment protrusion (18) that matches the forked bracket (17).

4. The folding and sliding combined hatch cover device according to claim 1, characterized in that: The cover plate lifting mechanism (9) comprises a wheel main support arm (19) which is freely rotatable and arranged on one side of the powered cover plate (3); the wheel (5) is rotatably arranged on the wheel main support arm (19); and a wheel auxiliary support arm (20) which drives and limits the wheel main support arm (19); one end of the wheel auxiliary support arm (20) is hinged to the wheel main support arm (19), and the other end is hinged to a slider shaft (21); a slider track (22) is provided on the side of the powered cover plate (3) in a horizontal direction, a slider body is slidably arranged in the slider track (22), and the slider body extends out of the slider track (22) and is provided with a slider shaft (21).

5. The folding and sliding combined hatch cover device according to claim 4, characterized in that: The cover plate lifting mechanism (9) further comprises a first support arm (23), a second support arm (24), and a push cylinder (25); the first support arm (23) and the second support arm (24) are hinged at their ends to form a deformable V-shaped hinged bending arm (26); the other end of the first support arm (23) is hinged on the slider body, the other end of the second support arm (24) is hinged on the side wall of the powered cover plate (3), one end of the push cylinder (25) is hinged on the side wall of the powered cover plate (3), and the other end is hinged at the hinge of the bending arm (26).

6. The folding and sliding combined hatch cover device according to claim 5, characterized in that: In the process of the pushing cylinder (25) extending and pushing the bending arm (26) from a V-shape to a straight shape, the main support arm swings to control the height change of the wheel (5) relative to the powered cover plate (3) and to raise the powered cover plate (3); when the first support arm (23) and the second support arm (24) are arranged in a straight line, they reach a dead point position, thereby positioning the wheel (5).

7. The folding and sliding combined hatch cover device according to claim 6, characterized in that: When the first support arm (23) and the second support arm (24) are arranged in a straight line, there is a power cover plate (3) with a fixing plate (27) provided below it, a height-adjustable limit plate (28) is provided above the fixing plate (27), an adjusting bolt (29) is threadedly connected through the fixing plate (27), and a limit plate (28) is provided at the upper end of the adjusting bolt (29).

8. The folding and sliding combined hatch cover device according to claim 1, characterized in that: The cover plate moving device comprises a hydraulic motor (30) and a chain (31), wherein the hydraulic motor (30) drives the chain (31) installed at the tracks (1) of the hatches (2) on both sides to operate, and an arm (32) is provided on the side of the powered cover plate (3), and the chain (31) is connected to the arm (32).

Images