Ship lift nut stud safety mechanism thread pair gap measuring device

Abstract

The utility model discloses a ship lift nut stud safety mechanism thread pair gap measuring device, which comprises a base, the base is coaxially and fixedly connected to the upper end of a screw, the upper end of the base is slidably connected with an installation cylinder along the vertical direction, and the outer side of the installation cylinder is fixedly connected with a plurality of rollers distributed along a spiral line. The axis of the spiral line coincides with the axis of the base, the screw pitch of the spiral line is matched with the screw pitch of the screw rod, a plate body located below the rollers is transversely arranged on the outer side of the installation cylinder, and a distance meter is connected to the base and used for measuring the distance between the distance meter and the plate body. According to the utility model, the variable quantity of the thread pair gap of the nut stud safety mechanism, which is difficult to measure through a conventional distance measuring instrument, is converted into the variable quantity of the distance between the lower end plate body of the mounting cylinder and the distance measuring instrument, so that the variable quantity of the thread pair gap of the nut stud safety mechanism can be conveniently and accurately measured through the conventional distance measuring instrument; therefore, the thread pair gap of the nut stud safety mechanism can be accurately obtained.

Description

Technical Field

[0001] The utility model belongs to the technical field of ship lifts, and in particular relates to a thread pair clearance measuring device for a nut column safety mechanism of a ship lift. Background Art

[0002] At present, fully balanced rack and pinion climbing ship lifts are often equipped with a nut column safety mechanism, which generally has a hollow long nut column laid in the vertical groove of each tower column side wall, and a short screw is arranged vertically in the nut column. Under normal circumstances, a certain gap will be maintained between the threaded surfaces of the two thread pairs, and the screw is connected to the gear shaft of the ship compartment drive mechanism through a mechanical transmission device. The appropriate transmission ratio of the mechanical transmission device is used to ensure that the climbing speed of the driving gear is strictly synchronized with the rotation speed of the screw. When the ship compartment is raised or lowered, the screw rotates idly in the nut column.

[0003] If the full balance system is damaged during the operation of the ship lift, as the load on the driving gear increases, the motor of the driving mechanism will stop and close the gate, and at the same time, the hydraulic spring of the four-bar bracket mechanism of the driving gear will release pressure, causing the ship-carrying box and the driving gear to move relative to each other. At this time, the thread pair clearance of the safety mechanism will gradually decrease in one direction until it disappears; if an accident such as a shipwreck or overload occurs during the docking of the ship compartment, if the unbalanced load exceeds the set load of the docking locking device, the thread pair clearance of the safety mechanism will also decrease or disappear. That is, under the above working conditions, with the help of the self-locking of the safety mechanism nut column and the screw, the unbalanced force of the ship compartment caused by the accident can be transmitted to the nut column through the screw, and then transmitted to the tower column structure by the nut column, thereby safely locking the ship compartment.

[0004] That is to say, whether the thread pair clearance of the nut column safety mechanism is normal is related to whether the ship lift can operate normally, so it is often necessary to monitor and measure the thread pair clearance of the nut column safety mechanism in real time. However, when the ship lift is running, the screw rotates and rises and falls in the nut column, and the position of the thread pair clearance is constantly changing. It is difficult to directly measure the thread pair clearance using conventional sensors; in addition, there is also a technology that uses image recognition to measure the thread pair spacing, that is, using a camera to aim at the nut column clearance and analyze the changes in the thread pair clearance through a certain algorithm, but its measurement accuracy is not high and it is difficult to measure under poor ambient light conditions. Utility Model Content

[0005] The utility model overcomes the defects of the prior art and provides a device for measuring the thread pair clearance of a nut column safety mechanism of a ship lift, which can accurately obtain the thread pair clearance of the nut column safety mechanism.

[0006] The purpose of the utility model is achieved through the following technical solutions:

[0007] A device for measuring the thread pair clearance of a nut column safety mechanism of a ship lift, which is installed on the nut column safety mechanism. The nut column safety mechanism includes a nut column and a screw rod, and includes:

[0008] A base, the base is coaxially fixedly connected to the upper end of the screw;

[0009] The mounting cylinder is vertically slidably connected to the upper end of the base, and a plurality of rollers distributed along a spiral line are fixedly connected to the outer side of the mounting cylinder. The axis of the spiral line coincides with the axis of the base, the spiral radius of the spiral line matches the inner thread radius of the nut column, and the pitch of the spiral line matches the pitch of the screw rod. A plate body located below the plurality of rollers is transversely arranged on the outer side of the mounting cylinder;

[0010] The rangefinder is connected to the base and is used to measure the distance between the rangefinder and the board.

[0011] It can be understood that due to the deadweight of the mounting barrel and the roller, the roller is always placed on the lower spiral surface of the inner thread of the nut column. When the screw rotates, the base drives the mounting barrel to rotate synchronously, and the roller rolls on the lower spiral surface of the inner thread of the nut column. That is, no matter whether the screw is stationary or rotating, once the thread pair clearance between the screw and the nut column changes, the mounting barrel will slide vertically, and the plate body will change by the same amount as the distance of the mounting barrel relative to the distance meter.

[0012] That is to say, when the upper and lower gaps between the screw and the nut column are consistent, the distance meter can measure the reference distance value between the distance meter and the plate body; when the upper and lower gaps between the screw and the nut column change, the distance meter can measure the measured distance value between the distance meter and the plate body, that is, by calculating the difference between the measured distance value and the reference distance value, the change value of the thread pair gap of the nut column safety mechanism can be obtained, which is conducive to accurately measuring the thread pair gap of the nut column safety mechanism.

[0013] In one embodiment, a guide member is vertically fixedly connected to the upper end of the base, and the mounting cylinder is slidably connected to the guide member.

[0014] The beneficial effect of adopting the above technical solution is that the guide member can provide a guide for the vertical sliding of the installation tube, so as to facilitate the vertical sliding of the installation tube relative to the base.

[0015] In one embodiment, the guide member includes a plurality of guide rods vertically fixedly connected to the upper end of the base, and a plurality of guide holes respectively slidably connected to the plurality of guide rods are provided in the installation tube.

[0016] The beneficial effect of adopting the above technical solution is that the installation tube relies on the several guide holes therein to slide on the several guide rods at the upper end of the base respectively, which on the one hand ensures that the installation tube slides vertically stably relative to the base, and on the other hand avoids relative rotation between the installation tube and the base.

[0017] In one embodiment, a plurality of guide rods are evenly arranged on the base along the circumferential direction.

[0018] The beneficial effect of adopting the above technical solution is that the force between the installation tube and the base is distributed more evenly by such arrangement.

[0019] In one embodiment, both ends of the guide hole are provided with shaft sleeves for sliding connection with the guide rod.

[0020] In one embodiment, a support arm is disposed transversely between the outer side of the mounting cylinder and the roller, and the support arm is used to extend the roller into the internal thread of the nut column.

[0021] The beneficial effect of adopting the above technical solution is that the roller extends transversely through the support arm into the internal thread of the nut column.

[0022] In one embodiment, a plurality of mounting seats are fixedly connected to the outer side of the mounting cylinder, and the outer side of the mounting seats is detachably connected to the support arms.

[0023] In one embodiment, a plurality of rollers are evenly arranged along the spiral line.

[0024] The beneficial effect of adopting the above technical solution is that such an arrangement is conducive to evenly applying the dead weight of components such as the mounting cylinder and the roller to the nut column through multiple rollers.

[0025] In one embodiment, the plate body is annular, and the plate body is coaxially arranged on the outer side of the lower end of the mounting tube. The nut column safety mechanism includes an upper guide frame arranged on the upper end of the screw rod, and the upper part of the upper guide frame is vertically fixedly connected with a rangefinder, and the plate body is located directly above the rangefinder.

[0026] The beneficial effect of adopting the above technical solution is that the distance meter on the upper guide frame can measure the distance between the screw and the plate body when the screw is stationary or rotating; specifically, when the screw rotates, since the plate body is coaxially arranged on the mounting cylinder, no matter which position the screw rotates to, there is always a part of the plate body directly above the distance meter, which is conducive to the distance meter to measure when the screw is rotating.

[0027] In one embodiment, the rangefinder is a laser rangefinder.

[0028] The beneficial effect of adopting the above technical solution is that the laser rangefinder is less affected by ambient light, which is conducive to accurate measurement of the rangefinder.

[0029] The beneficial effects of the utility model are:

[0030] The device for measuring the thread pair clearance of the nut column safety mechanism of the ship lift converts the change in the thread pair clearance of the nut column safety mechanism, which is difficult to measure through conventional distance measuring instruments, into a change in the distance between the lower end plate of the installation tube and the distance meter, thereby facilitating the accurate measurement of the thread pair clearance change of the nut column safety mechanism through conventional distance meters, and further facilitating the accurate acquisition of the thread pair clearance of the nut column safety mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The present invention will be described in more detail below based on embodiments and with reference to the accompanying drawings.

[0032] in:

[0033] Figure 1 The schematic diagram of the structure of the utility model is shown;

[0034] Figure 2 The installation diagram of the utility model is shown;

[0035] Figure 3 Shows Figure 2 A partial enlarged view of the middle A;

[0036] Figure 4 The schematic diagram of the structure of the base in the utility model is shown;

[0037] Figure 5 The schematic diagram of the structure of the installation tube in the utility model is shown;

[0038] Figure 6 Shows Figure 5 Sectional view at the middle BB;

[0039] In the drawings, like reference numerals are used for like parts. The drawings are not necessarily to scale.

[0040] Reference numerals:

[0041] 1-base, 2-mounting tube, 3-mounting seat, 4-support arm, 5-roller, 6-guide rod, 7-guide hole, 8-plate body, 9-screw, 10-nut column, 11-distance meter, 12-upper guide frame, 13-sleeve. DETAILED DESCRIPTION

[0042] The utility model will be further described below in conjunction with the accompanying drawings.

[0043] The utility model provides a device for measuring the thread pair clearance of a nut column safety mechanism of a ship lift, such as Figure 1-3 As shown, it is installed on a nut column safety mechanism, which includes a nut column 10 and a screw 9, and includes:

[0044] Base 1, base 1 is coaxially fixedly connected to the upper end of screw rod 9;

[0045] The mounting cylinder 2 is vertically slidably connected to the upper end of the base 1. A plurality of rollers 5 distributed along a spiral line are fixedly connected to the outer side of the mounting cylinder 2. The axis of the spiral line coincides with the axis of the base 1. The spiral radius of the spiral line matches the inner thread radius of the nut column 10. The pitch of the spiral line matches the pitch of the screw 9. A plate 8 located below the plurality of rollers 5 is transversely arranged on the outer side of the mounting cylinder 2.

[0046] The distance meter 11 is connected to the base 1 , and is used to measure the distance between the distance meter 11 and the plate 8 .

[0047] It can be understood that due to the deadweight of the installation cylinder 2 and the roller 5, the roller 5 is always placed on the lower spiral surface of the internal thread of the nut column 10. When the screw 9 rotates, the base 1 drives the installation cylinder 2 to rotate synchronously, and the roller 5 rolls on the lower spiral surface of the internal thread of the nut column 10. That is, no matter whether the screw 9 is stationary or rotating, once the thread pair clearance between the screw 9 and the nut column 10 changes, the installation cylinder 2 will slide vertically, and the plate 8 will change by the same amount as the distance of the installation cylinder 2 relative to the distance meter 11.

[0048] That is to say, when the upper and lower gaps between the screw rod 9 and the nut column 10 are consistent, the distance meter 11 can measure the reference distance value between the distance meter 11 and the plate body 8. When the upper and lower gaps between the screw rod 9 and the nut column 10 change, the distance meter 11 can measure the measured distance value between the distance meter 11 and the plate body 8. That is, by calculating the difference between the measured distance value and the reference distance value, the change value of the thread pair clearance of the nut column safety mechanism can be obtained, which is conducive to accurately measuring the thread pair clearance of the nut column safety mechanism.

[0049] In one embodiment, a guide member is vertically fixedly connected to the upper end of the base 1, and the mounting tube 2 is slidably connected to the guide member.

[0050] It can be understood that the guide member can provide a guide for the vertical sliding of the installation tube 2 to facilitate the vertical sliding of the installation tube 2 relative to the base 1.

[0051] In one embodiment, Figure 4 and Figure 5 As shown, the guide member includes three guide rods 6 vertically fixedly connected to the upper end of the base 1, and three guide holes 7 respectively slidably connected to the three guide rods 6 are arranged in the installation tube 2.

[0052] It can be understood that the installation tube 2 relies on the three guide holes 7 therein to slide on the three guide rods 6 at the upper end of the base 1 respectively, on the one hand ensuring that the installation tube 2 slides vertically stably relative to the base 1, on the other hand avoiding relative rotation between the installation tube 2 and the base 1.

[0053] In one embodiment, three guide rods 6 are evenly arranged on the base 1 along the circumferential direction, so that the acting force between the mounting tube 2 and the base 1 is more evenly distributed.

[0054] In one embodiment, Figure 6 As shown, both ends of the guide hole 7 are provided with shaft sleeves 13 for sliding connection with the guide rod 6 .

[0055] In one embodiment, a support arm 4 is disposed transversely between the outer side of the mounting cylinder 2 and the roller 5 , and the support arm 4 is used to extend the roller 5 into the internal thread of the nut column 10 .

[0056] It can be understood that the roller 5 extends transversely through the support arm 4 into the internal thread of the nut column 10 .

[0057] In one embodiment, a plurality of mounting seats 3 are fixedly connected to the outer side of the mounting cylinder 2 , and the outer side of the mounting seats 3 is detachably connected to the support arms 4 .

[0058] It should be noted that the mounting seat 3 can be connected to the support arm 4 by bolts.

[0059] In one embodiment, a plurality of rollers 5 are evenly arranged along the spiral line, so as to facilitate that the dead weight of the mounting cylinder 2 , the rollers 5 and other components are evenly applied to the nut column 10 through the plurality of rollers 5 .

[0060] In one embodiment, the plate body 8 is annular and is coaxially arranged on the outer side of the lower end of the mounting tube 2. The nut column safety mechanism includes an upper guide frame 12 arranged on the upper end of the screw rod 9. The upper part of the upper guide frame 12 is vertically fixedly connected with a rangefinder 11, and the plate body 8 is located directly above the rangefinder 11.

[0061] It can be understood that the distance meter 11 on the upper guide frame 12 can measure the distance between the screw rod 9 and the plate body 8 when the screw rod 9 is stationary or rotating.

[0062] Specifically, when the screw 9 rotates, since the plate 8 is coaxially arranged on the mounting tube 2, no matter which position the screw 9 rotates to, a portion of the plate 8 is always directly above the rangefinder 11, which is conducive to the rangefinder 11 to measure when the screw 9 is rotating.

[0063] In one embodiment, the rangefinder 11 is a laser rangefinder.

[0064] It can be understood that the laser rangefinder is less affected by ambient light, which is conducive to accurate measurement of the rangefinder 11.

[0065] It should be noted that the distance meter 11 may also be a thimble-type distance meter with a roller.

[0066] In the description of the present invention, it should be understood that the terms "upper", "lower", "bottom", "top", "front", "back", "inside", "outside", "left", "right", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0067] Although the present invention is described herein with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the present invention. It should therefore be understood that many modifications may be made to the exemplary embodiments, and other arrangements may be designed without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that the features described in the various dependent claims and herein may be combined in a manner different from that described in the original claims. It may also be understood that the features described in conjunction with the individual embodiments may be used in other described embodiments.

Claims

1. A device for measuring the thread pair clearance of a nut column safety mechanism of a ship lift, mounted on the nut column safety mechanism, wherein the nut column safety mechanism comprises a nut column (10) and a screw (9), characterized in that: include: A base (1), wherein the base (1) is coaxially fixedly connected to the upper end of the screw rod (9); A mounting tube (2), wherein the mounting tube (2) is vertically slidably connected to the upper end of the base (1), a plurality of rollers (5) distributed along a spiral line are fixedly connected to the outer side of the mounting tube (2), the axis of the spiral line coincides with the axis of the base (1), the spiral radius of the spiral line matches the internal thread radius of the nut column (10), the pitch of the spiral line matches the pitch of the screw rod (9), and a plate body (8) located below the plurality of rollers (5) is transversely arranged on the outer side of the mounting tube (2); A distance meter (11), the distance meter (11) is connected to the base (1), and the distance meter (11) is used to measure the distance between the distance meter (11) and the plate body (8).

2. A device for measuring the thread pair clearance of a ship lift nut stud safety mechanism according to claim 1, characterized in that: The upper end of the base (1) is vertically fixedly connected to a guide member, and the mounting tube (2) is slidably connected to the guide member.

3. A device for measuring thread pair clearance of a ship lift nut stud safety mechanism according to claim 2, characterized in that: The guide member comprises a plurality of guide rods (6) vertically fixedly connected to the upper end of the base (1), and a plurality of guide holes (7) respectively slidably connected to the plurality of guide rods (6) are arranged in the installation tube (2).

4. A device for measuring thread pair clearance of a ship lift nut stud safety mechanism according to claim 3, characterized in that: A plurality of guide rods (6) are evenly arranged on the base (1) along the circumferential direction.

5. The device for measuring the thread pair clearance of the nut stud safety mechanism of a ship lift according to claim 3, characterized in that: Both ends of the guide hole (7) are provided with shaft sleeves (13) for sliding connection with the guide rod (6).

6. A device for measuring thread pair clearance of a ship lift nut stud safety mechanism according to claim 1, characterized in that: A support arm (4) is transversely arranged between the outer side of the installation cylinder (2) and the roller (5), and the support arm (4) is used to extend the roller (5) into the internal thread of the nut column (10).

7. A device for measuring thread pair clearance of a ship lift nut stud safety mechanism according to claim 6, characterized in that: A plurality of mounting seats (3) are fixedly connected to the outer side of the mounting cylinder (2), and the outer side of the mounting seat (3) is detachably connected to the support arm (4).

8. The device for measuring the thread pair clearance of the nut stud safety mechanism of a ship lift according to claim 1, characterized in that: The plurality of rollers (5) are evenly arranged along the spiral line.

9. A device for measuring thread pair clearance of a ship lift nut stud safety mechanism according to claim 1, characterized in that: The plate body (8) is annular and is coaxially arranged on the outer side of the lower end of the mounting tube (2). The nut column safety mechanism comprises an upper guide frame (12) arranged on the upper end of the screw rod (9). The upper part of the upper guide frame (12) is vertically fixedly connected to the rangefinder (11). The plate body (8) is located directly above the rangefinder (11).

10. A device for measuring thread pair clearance of a ship lift nut stud safety mechanism according to claim 1 or 9, characterized in that: The distance meter (11) is a laser distance meter.

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