Electric-hydraulic push rod protection limiting device for ship unloader hopper gate

Abstract

The utility model relates to the technical field of limiting protection, in particular to a protecting and limiting device for an electric-hydraulic push rod of a ship unloader hopper gate. Comprising a taking hopper and an electro-hydraulic telescopic rod used for driving a gate on one side of the taking hopper to open and close, a rib plate is arranged in the taking hopper, a fixed base is welded to the surface of the taking hopper, a first limiting switch and a second limiting switch are installed at the upper end and the lower end of the fixed base respectively, and a trigger baffle is welded to the side close to the second limiting switch; the first limiting switch and the second limiting switch which are used for protecting and limiting through the electric-hydraulic push rod are installed on the rib plate on the side face of the track of the hopper door, the trigger baffle is welded to one side of the hopper gate, the hopper door is driven by the electric-hydraulic push rod to move to drive the trigger baffle to move, and end point protection limiting is triggered; in this way, the situation that due to vibration, a limiting trigger rod in an original structure is broken, a trigger block loosens and shifts, and therefore limiting cannot be triggered is avoided, and safe and stable operation of the hopper gate electric-hydraulic push rod is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of limit protection, in particular to an electro-hydraulic push rod protection limit device for a hopper gate of a ship unloader. Background Art

[0002] The bridge grab ship unloader is a bulk cargo unloading equipment used in ports. It grabs the materials in the ship's cabin through the grab bucket. During the unloading operation, the hopper gate of the ship unloader moves through the telescopic movement of the electro-hydraulic push rod. Two telescopic end point detection limit switches are installed on the electro-hydraulic push rod to realize the telescopic operation protection of the electro-hydraulic push rod and the end point detection of the hopper gate position, so as to prevent the mechanical damage of the electro-hydraulic push rod caused by over-travel operation.

[0003] The two ends of the existing electro-hydraulic push rod are connected by a pin shaft, and the joint bearing can swing to a certain extent. The hopper gate of the ship unloader also runs in the corresponding track slot through the rollers at the four corners. The vibrating feeder of the ship unloader is installed at the bottom of the hopper. The vibrating feeder will generate large vibrations when working. The electro-hydraulic push rod is in a retracted state in the working state so that the gate remains open. At this time, only a small part of the bottom of the limit trigger rod is fixed by the fixing bolts and the supporting device, and the working environment has been in a high-intensity vibration state, resulting in a large swing of the limit trigger rod, and the top screw of the square iron block that triggers the limit will become loose, which will lead to the failure of the electro-hydraulic push rod to trigger the limit normally during operation, and the electro-hydraulic push rod loses the terminal position protection, and even because the gate has been completely closed, the electro-hydraulic push rod continues to run, and the gate is subjected to resistance, resulting in a serious safety accident of the electro-hydraulic push rod piston rod head breaking. Utility Model Content

[0004] The utility model aims to provide an electro-hydraulic push rod protection limit device for a ship unloader hopper gate, which solves the problem that both ends of the existing electro-hydraulic push rod in the background technology are connected by a pin shaft, but large vibration will be generated during the operation of the ship unloader, and only a small part of the bottom of the limit trigger rod on the electro-hydraulic push rod is fixed by the fixing bolts and the supporting device, resulting in a large swing of the limit trigger rod, which in turn causes the electro-hydraulic push rod to fail to trigger the limit normally during operation, causing the electro-hydraulic push rod to lose the terminal position protection, and even causing the gate to be completely closed, but the electric hydraulic push rod continues to operate, and the gate is subjected to resistance, resulting in a serious safety accident such as the electric hydraulic push rod piston rod head breaking.

[0005] To achieve the above object, the utility model provides the following technical solutions: an electro-hydraulic push rod protection limit device for a hopper gate of a ship unloader, comprising a hopper and an electro-hydraulic telescopic rod for driving a gate on one side of the hopper to open and close;

[0006] The hopper includes a hopper door and tracks arranged on both sides of the hopper door for connecting with the hopper door, a rib plate is arranged on the side of the track, a fixed base is welded on the surface of the rib plate, a first limit switch and a second limit switch are respectively installed at the upper and lower ends of the fixed base, a trigger baffle is welded on the side close to the second limit switch, and a connecting seat connected to the output end of the electro-hydraulic telescopic rod is arranged at the corner of the hopper door.

[0007] Preferably, a piston rod is provided at the output end of the electro-hydraulic telescopic rod, a connecting block for connecting to a connecting seat is fixedly provided at the lower end of the piston rod, and a latch is mounted on the connecting block.

[0008] Preferably, a limit trigger rod is provided on one side of the electro-hydraulic telescopic rod, and a limit trigger block 1 assembled on the surface of the electro-hydraulic telescopic rod is provided at the lower end of the limit trigger rod.

[0009] Preferably, a second limit trigger block is provided at the upper end of the limit trigger rod.

[0010] Preferably, a motor is arranged at the rear of the electro-hydraulic telescopic rod, an oil cylinder fixed to the surface of the electro-hydraulic telescopic rod is arranged at the front end of the motor, and a mounting frame for fixing the electro-hydraulic telescopic rod is arranged in the middle section of the electro-hydraulic telescopic rod.

[0011] Preferably, a limit trigger block 1 and a limit trigger block 2 are arranged below the limit trigger rod and are matched with the two groups of limit blocks 1 and limit blocks 2 respectively.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows: by installing the first limit switch and the second limit switch used by the electro-hydraulic push rod to protect the limit on the rib plate on the side of the track of the hopper door, and then welding a limit trigger iron block on one side of the hopper gate, the electro-hydraulic push rod drives the movement of the gate and thus drives the movement of the limit trigger block to trigger the end point protection limit, thereby avoiding the situation in which the limit trigger rod in the original structure breaks and the trigger block loosens and shifts due to vibration, thereby achieving safe and stable operation of the hopper gate electro-hydraulic push rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 This is a schematic diagram of the hopper structure of the utility model;

[0015] Figure 3 The structure of the electro-hydraulic telescopic rod of the utility model is shown in FIG. Figure 1

[0016] Figure 4 The structure of the electro-hydraulic telescopic rod of the utility model is shown in FIG. Figure 2

[0017] Figure 5 It is a schematic diagram of the limit trigger rod and trigger point structure of the utility model.

[0018] In the figure: 1. electro-hydraulic telescopic rod; 11. piston rod; 12. limit trigger rod; 121. limit trigger block 1; 123. limit trigger block 2; 124. limit block 1; 125. limit block 2; 126 limit 2, 13. connecting block; 131. latch; 14. motor; 15. oil cylinder; 16. mounting frame; 2. hopper; 21. first limit switch; 22. fixed base; 23. second limit switch; 24. trigger baffle; 25. rib plate; 26. hopper door; 27. track; 28. connecting seat. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] In order to further understand the content of the utility model, the utility model is described in detail in conjunction with the accompanying drawings.

[0021] Combination Figure 1 and Figure 2 The utility model discloses an electro-hydraulic push rod protection and limiting device for a hopper gate of a ship unloader, comprising a hopper 2 and an electro-hydraulic telescopic rod 1 for driving a gate on one side of the hopper 2 to open and close;

[0022] The hopper 2 includes a hopper door 26 and tracks 27 arranged on both sides of the hopper door 26 for connecting thereto, a rib plate 25 is arranged on the side of the track 27, a fixed base 22 is welded on the surface of the rib plate 25, a first limit switch 21 and a second limit switch 23 are respectively installed at the upper and lower ends of the fixed base 22, a trigger baffle 24 is welded on the side close to the second limit switch 23, and a connecting seat 28 for connecting to the output end of the electro-hydraulic telescopic rod 1 is arranged at the corner of the hopper door 26.

[0023] First, a limit installation fixed base 22 is welded on the side of the hopper gate track 27 and the hopper wall rib plate 25, and a first limit switch 21 and a second limit switch 23 are respectively installed on the upper end and the lower end of the fixed base 22. The straight-line distance between the first limit switch 21 and the second limit switch 23 should be kept consistent with the stroke distance of the original electro-hydraulic telescopic rod 1, and the control line of the original electro-hydraulic telescopic rod 1 stroke switch is divided into two parts and connected to the corresponding first limit switch 21 and the second limit switch 23;

[0024] A trigger baffle 24 for limiting is welded on one side of the hopper door 26 near the first limit switch 21. The trigger baffle 24 can move with the hopper door 26. The size and installation position of the limit trigger baffle 24 must ensure that it can trigger the newly installed switch rocker and trigger the first limit switch 21 and the second limit switch 23. When the electro-hydraulic telescopic rod 1 retracts, the hopper door 26 opens. When the trigger baffle 24 triggers the first limit switch 21, the electro-hydraulic telescopic rod 1 stops running and the hopper door 26 is in a fully closed state. When the electro-hydraulic telescopic rod 1 extends, the hopper door 26 is closed. When the limit baffle triggers the second limit switch 23, the electro-hydraulic telescopic rod 1 stops running and the hopper door 26 is in a fully open state. Since the first limit switch 21 and the second limit switch 23 are mounted on the rib plate 25 of the hopper wall, and the trigger baffle 24 for opening the switch is welded to the side of the hopper door 26, the limit switch and the limit trigger baffle 24 on the hopper door 26 are not affected by the vibration of the vibrating feeder, the limit switch can be triggered timely and accurately during operation of the electro-hydraulic telescopic rod 1, thereby ensuring the safe operation of the electro-hydraulic telescopic rod 1.

[0025] The utility model is further described below in conjunction with embodiments.

[0026] Combination Figure 3-Figure 5 In this embodiment, a piston rod 11 is provided at the output end of the electro-hydraulic telescopic rod 1, a connecting block 13 for connecting to the connecting seat 28 is fixedly provided at the lower end of the piston rod 11, and a latch 131 is mounted on the connecting block 13;

[0027] Furthermore, the connecting seat 28 is located in the track 27, and the electro-hydraulic telescopic rod 1 can make the hopper door 26 open and close through the piston rod 11. The connecting block 13 at the lower end of the piston rod 11 is used to dock with the connecting seat 28, and the pin 131 is used to connect the connecting block 13 and the connecting seat 28.

[0028] In this embodiment, a limit trigger rod 12 is provided on one side of the electro-hydraulic telescopic rod 1, and a limit trigger block 121 assembled on the surface of the electro-hydraulic telescopic rod 1 is provided at the lower end of the limit trigger rod 12;

[0029] A second limit trigger block 123 is disposed at the upper end of the limit trigger rod 12 .

[0030] A motor 14 is arranged at the rear of the electro-hydraulic telescopic rod 1, a cylinder 15 fixed on the surface of the electro-hydraulic telescopic rod 1 is arranged at the front end of the motor 14, and a mounting frame 16 for fixing the electro-hydraulic telescopic rod 1 is arranged in the middle section.

[0031] A limit trigger block 121 and a limit trigger block 123 are arranged below the limit trigger rod 12 to match the two groups of limit blocks 1 124 and limit blocks 125 respectively.

[0032] In this embodiment, a limit block 124 and a limit block 2 125 are arranged on the right side of the outer wall of the electro-hydraulic push rod, a motor 14 is arranged at the rear of the electro-hydraulic telescopic rod 1, a cylinder 15 fixed to the surface of the electro-hydraulic telescopic rod 1 is arranged at the front end of the motor 14, a mounting frame 16 for fixing the electro-hydraulic telescopic rod 1 is arranged in the middle section, and a limit trigger block 121 and a limit trigger block 2 123 are arranged above and below the limit trigger rod 12, which are matched with the limit block 124 and the limit block 2 125 respectively;

[0033] Furthermore, the motor 14 and the cylinder 15 at the rear of the electro-hydraulic telescopic rod 1 are used to drive the piston rod 11 at the lower end of the electro-hydraulic telescopic rod 1 to perform telescopic movement. At the same time, the mounting frame 16 in the middle section of the electro-hydraulic telescopic rod 1 is used to fix the electro-hydraulic telescopic rod 1. The limit trigger block 1 121 and the limit trigger block 2 123 at the upper and lower ends of the limit trigger rod 12 and the limit block 1 124 and the limit block 2 125 arranged on the right side of the outer wall of the electro-hydraulic push rod can also perform limit control on the electro-hydraulic telescopic rod 1. In conjunction with the first limit switch 21 and the second limit switch 23, the control of the electro-hydraulic telescopic rod 1 over the opening and closing of the hopper door 26 is further strengthened, thereby playing a role of backup control.

[0034] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0035] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An electro-hydraulic push rod protection and limiting device for a hopper gate of a ship unloader, comprising a hopper (2) and an electro-hydraulic telescopic rod (1) for driving a gate on one side of the hopper (2) to open and close, characterized in that: The hopper (2) comprises a hopper door (26) and tracks (27) arranged on both sides of the hopper door (26) for connecting with the hopper door, the track (27), and the track (27) are provided with ribs (25) on the side of the track (27), and a fixed base (22) is welded on the surface of the ribs (25), and the first limit switch (21) and the second limit switch (23) are respectively installed at the upper and lower ends of the fixed base (22), and a trigger baffle (24) is welded on the side close to the second limit switch (23), and a connecting seat (28) for connecting with the output end of the electro-hydraulic telescopic rod (1) is provided at the corner of the hopper door (26).

2. The electro-hydraulic push rod protection and limiting device for the hopper gate of a ship unloader according to claim 1 is characterized in that: The output end of the electro-hydraulic telescopic rod (1) is provided with a piston rod (11), the lower end of the piston rod (11) is fixedly provided with a connecting block (13) for connecting with a connecting seat (28), and the connecting block (13) is equipped with a latch (131).

3. The electro-hydraulic push rod protection and limiting device for the hopper gate of a ship unloader according to claim 1 is characterized in that: A limit trigger rod (12) is provided on one side of the electro-hydraulic telescopic rod (1); a limit trigger block 1 (121) mounted on the surface of the electro-hydraulic telescopic rod (1) is provided at the lower end of the limit trigger rod (12); and a limit trigger block 2 (123) is provided at the upper end of the limit trigger rod (12).

4. The electro-hydraulic push rod protection and limiting device for the hopper gate of a ship unloader according to claim 3 is characterized in that: A motor (14) is arranged at the rear of the electro-hydraulic telescopic rod (1), a cylinder (15) fixed to the surface of the electro-hydraulic telescopic rod (1) is arranged at the front end of the motor (14), and a mounting frame (16) for fixing the electro-hydraulic telescopic rod (1) is arranged in the middle section of the electro-hydraulic telescopic rod (1).

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