An integrated lifting equipment hydraulic system for high-stability bridge crane

Abstract

This invention relates to the field of container spreader technology, and in particular, to an integrated hydraulic system for a high-stability gantry crane. The system includes a spreader body and a lifting frame mounted on the spreader body. The lifting frame includes a first lifting frame and a second lifting frame. The first lifting frame is fixedly mounted at a first end of the spreader body, and the second lifting frame is movably mounted at a second end of the spreader body. The spreader body is equipped with a tilt monitoring system for monitoring the tilt direction of the spreader body. The spreader body is also equipped with a hydraulic system for adjusting the position of the second lifting frame. A central control unit is mounted on the spreader body. The tilt monitoring system and the hydraulic system are electrically connected to the central control unit. This invention monitors the tilt direction of the spreader body in real time and adjusts the position of the second lifting frame to adjust the center of gravity of the spreader body, thus preventing the spreader body from tilting.

Description

Technical Field

[0001] The present invention relates to the technical field of container spreaders, and in particular to an integrated spreader hydraulic system for a high-stability bridge crane. Background Art

[0002] When containers are transshipped at ports or docks, special lifting equipment is generally required to move the containers.

[0003] With the increasing requirements for container throughput at the terminal, it is necessary to increase the transfer rate of containers. At present, a telescopic sling that can lift multiple containers at a time has been developed. This sling can be extended and retracted according to the length of the container to achieve the lifting of multiple containers. Due to the different weights of the goods loaded in the container, when two containers with different gravity are lifted at the same time, or the goods in the container are unevenly distributed, the center of gravity of the container will deviate from the extraction center of the cable, which may easily cause the sling to tilt and the container to fall. At the same time, it increases the difficulty of lifting the container, which is not conducive to improving the lifting rate of the container. Therefore, how to design an integrated sling hydraulic system that always maintains the balance of the sling body has become a technical problem that needs to be solved urgently by technicians in this field. Summary of the invention

[0004] In view of this, an object of the present invention is to provide an integrated sling hydraulic system for a high-stability bridge crane, which solves the problem of sling tilting caused by uneven weight distribution of cargo in a container.

[0005] In order to solve the above technical problems, the technical solution of the present invention is:

[0006] An integrated hoist hydraulic system for a high-stability bridge crane comprises a hoist body and a hoisting frame installed on the hoist body, the hoisting frame comprising a first hoisting frame and a second hoisting frame, the first hoisting frame being fixedly installed on the first end of the hoist body, the second hoisting frame being movably installed on the second end of the hoist body, the hoist body being provided with a tilt monitoring system for monitoring the tilt direction of the hoist body, the hoist body being provided with a hydraulic system for adjusting the position of the second hoisting frame, a central control unit being installed on the hoist body, and the tilt monitoring system and the hydraulic system being electrically connected to the central control unit.

[0007] The present invention utilizes a first lifting frame and a second lifting frame to lift a lifting device body and a container at the same time. When the center of gravity of the container is offset from the lifting centers of the first lifting frame and the second lifting frame, the lifting device body is tilted. A tilt monitoring system is utilized to monitor the tilt direction of the lifting device body, and then the information is transmitted to a central control unit. The central control unit controls a hydraulic system, and then adjusts the position of the second lifting frame to achieve that the lifting centers of the first lifting frame and the second lifting frame are in the same vertical direction as the center of gravity of the container. The tilt angle of the lifting device body is adjusted to maintain the balance of the lifting device body, thereby providing safety guarantee for efficient and stable lifting of the container.

[0008] Furthermore, a slide groove is provided on the sling body, and the second lifting frame is slidably installed in the slide groove.

[0009] Furthermore, the tilt monitoring system includes a monitoring box, a guide rod, a float and a touch switch group, the touch switch group is electrically connected to the central control unit, the monitoring box is fixedly installed on the sling body, the inner cavity of the monitoring box is filled with water, the guide rod is fixedly installed on the inner cavity side wall of the monitoring box, the axis of the guide rod is consistent with the length direction of the sling body, the float is sleeved on the guide rod and slidably connected, the touch switch group includes a first touch switch, a second touch switch, and a third touch switch distributed along the axial direction of the guide rod, the first touch switch is located in the middle of the upper end of the monitoring box, The second touch switch is close to one side of the first lifting frame, and the third touch switch is close to one side of the second lifting frame. When the float abuts against the first touch switch, the first touch switch is closed, and a signal that the sling body is in a balanced state is transmitted to the central control unit. When the float abuts against the second touch switch, the second touch switch transmits a signal to the central control unit, and the central control unit controls the hydraulic system to drive the second lifting frame to move toward the first lifting frame. When the float abuts against the third touch switch, the third touch switch transmits a signal to the central control unit, and the central control unit controls the hydraulic system to drive the second lifting frame to move away from the first lifting frame.

[0010] Furthermore, a limit spring is sleeved on the guide rod, a first end of the limit spring is fixed to the inner wall of the monitoring box, and a second end of the limit spring is fixed to the float.

[0011] Furthermore, the hydraulic system includes a hydraulic cylinder and a three-position four-way solenoid valve for controlling the flow direction of hydraulic oil in the hydraulic cylinder. The three-position four-way solenoid valve is electrically connected to the central control unit, and the output end of the hydraulic cylinder is fixedly connected to the second lifting frame.

[0012] Furthermore, the middle position of the three-position four-way solenoid valve is "M type".

[0013] Furthermore, the hydraulic system also includes a relief valve.

[0014] Furthermore, the hydraulic system also includes a filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the present invention;

[0016] Figure 2 for Figure 1 A is a schematic diagram of the enlarged structure of the middle part;

[0017] Figure 3 is a cross-sectional view of the hydraulic system of the present invention;

[0018] Figure 4 is a cross-sectional view of the tilt monitoring system of the present invention;

[0019] Figure 5 It is a schematic diagram of the hydraulic system of the present invention.

[0020] Figure numerals: 100, sling body; 101, first lifting frame; 102, second lifting frame; 103, slide; 200, hydraulic system; 201, hydraulic cylinder; 2011, piston; 2012, rodless chamber; 2013, rod chamber; 2014, hydraulic rod; 202, oil tank; 203, filter; 204, hydraulic pump; 205, motor; 206, overflow valve; 207, three-position four-way solenoid valve; 300, tilt monitoring system; 301, monitoring box; 302, guide rod; 303, float; 304, limit spring; 305, touch switch group; 3051, first touch switch; 3052, second touch switch; 3053, third touch switch. DETAILED DESCRIPTION

[0021] The specific implementation modes of the present invention are further described below in conjunction with the accompanying drawings to make the technical solutions of the present invention easier to understand and grasp.

[0022] Example:

[0023] The present embodiment provides an integrated hoist hydraulic system for a high-stability bridge crane, which is mainly used for installation on the bridge crane hoist, real-time monitoring of the hoist inclination and maintaining the balance of the hoist.

[0024] The utility model comprises a sling body 100 and a sling frame installed on the sling body 100, wherein the sling frame comprises a first sling frame 101 and a second sling frame 102, wherein the first sling frame 101 is fixedly installed on the first end of the sling body 100, and the second sling frame 102 is movably installed on the second end of the sling body 100, and the sling body 100 is provided with a tilt monitoring system 300 for monitoring the tilt direction of the sling body 100, and the sling body 100 is provided with a hydraulic system 200 for adjusting the position of the second sling frame 102, and a central control unit is installed on the sling body 100, and the tilt monitoring system 300 and the hydraulic system 200 are both electrically connected to the central control unit.

[0025] Specific:

[0026] In order to realize the installation of the second lifting frame 102, Figure 1 and Figure 3 As shown, a slide groove 103 is provided on the sling body 100 , and the second sling frame 102 is slidably installed in the slide groove 103 .

[0027] In order to realize the tilt detection of the sling body 100 and the adjustment of the center of gravity position of the sling body 100, in this embodiment, Figure 2 , Figure 3 and Figure 4As shown, the tilt monitoring system 300 includes a monitoring box 301, a guide rod 302, a float 303 and a touch switch group 305. The touch switch group 305 is electrically connected to the central control unit. The monitoring box 301 is fixedly installed on the sling body 100. The inner cavity of the monitoring box 301 is filled with water. The guide rod 302 is fixedly installed on the inner cavity side wall of the monitoring box 301. The axis of the guide rod 302 is consistent with the length direction of the sling body 100. The float 303 is sleeved on the guide rod 302 and slidably connected. The touch switch group 305 includes a first touch switch 3051, a second touch switch 3052, and a third touch switch 3053 distributed along the axial direction of the guide rod 302. The first touch switch 3051 is located in the middle of the upper end of the monitoring box 301. The second touch switch 3052 is close to the side of the first lifting frame 101, and the third touch switch 3053 is close to the side of the second lifting frame 102. When the float 303 abuts against the first touch switch 3051, the first touch switch 3051 is closed, and a signal that the sling body 100 is in a balanced state is transmitted to the central control unit. When the float 303 abuts against the second touch switch 3052, the second touch switch 3052 transmits a signal to the central control unit, and the central control unit controls the hydraulic system 200 to drive the second lifting frame 102 to move toward the side of the first lifting frame 101. When the float 303 abuts against the third touch switch 3053, the third touch switch 3053 transmits a signal to the central control unit, and the central control unit controls the hydraulic system 200 to drive the second lifting frame 102 to move away from the first lifting frame 101.

[0028] Through the above arrangement, when the spreader body 100 is in a balanced state, the float 303 is located in the middle position of the guide rod 302, and the float 303 contacts the first touch switch 3051 and closes the first touch switch 3051. At this time, the first touch switch 3051 transmits a signal to the central control unit that the spreader body 100 is in a balanced state. When the spreader body 100 tilts, since the center of gravity of the goods stacked inside the container deviates from the center position, when one end of the first lifting frame 101 tilts upward, it means that the center of gravity of the spreader body 100 is biased toward the second lifting frame 102. At this time, the float 303 is moved toward the second touch switch 3052 by the buoyancy, thereby realizing the disconnection of the first touch switch 3051 and the closing of the second touch switch 3052. , the second touch switch 3052 transmits a signal to the central control unit, and the central control unit controls the second lifting frame 102 to move closer to the first lifting frame 101 through the hydraulic system 200, thereby adjusting the center of gravity of the sling body 100 to maintain the balance of the sling body 100. When one end of the first lifting frame 101 sinks, the center of gravity of the sling body 100 and the hoisted goods is biased toward the first lifting frame 101. At this time, the float 303 moves closer to the second lifting frame 102, and the float 303 contacts the third touch switch 3053, and then the third touch switch 3053 is closed, transmitting a signal to the central control unit and notifying the hydraulic system 200 to drive the second lifting frame 102 to move away from the first lifting frame 101, so as to achieve the effect of maintaining the balance of the sling body 100.

[0029] In order to achieve that the sling body 100 is in a balanced state, the float 303 abuts against the first touch switch 3051, in this embodiment, Figure 4 As shown, a limit spring 304 is sleeved on the guide rod 302 , a first end of the limit spring 304 is fixed to the inner wall of the monitoring box 301 , and a second end of the limit spring 304 is fixed to the float 303 .

[0030] Through the above arrangement, when the sling body 100 is tilted, the decomposition force of the buoyancy of the float 303 in the direction of the guide rod 302 is greater than the elastic force / tension of the spring 304, thereby squeezing / stretching the spring 304. When the sling body 100 returns to a horizontal state, the tension / elastic force of the spring 304 drives the float 303 to reset and abut against the first touch switch 3051.

[0031] In order to achieve continuous contact between the float 303 and the second touch switch 3052 and the third touch switch 3053, in this embodiment, Figure 4As shown, the contact area between the second touch switch 3052 and the third touch switch 3053 and the float 303 is larger than the contact area between the float 303 and the first touch switch 3051, and the end surface of the second touch switch 3052 in contact with the float 303 extends to the inner wall of the monitoring box 301 close to the first lifting frame 101, and the end surface of the third touch switch 3053 in contact with the float 303 extends to the inner wall of the monitoring box 301 close to the second lifting frame 102, ensuring that there are sufficient contact points between the float 303 and the second touch switch 3052 and the third touch switch 3053, and the edges of the contact end surfaces of the touch switch group 305 and the float 303 are chamfered to facilitate the switching of the float 303 on the touch switch group 305.

[0032] In order to adjust the position of the second lifting frame 102, in this embodiment, Figure 1 and Figure 2 As shown, the hydraulic system 200 includes a hydraulic cylinder 201 and a three-position four-way solenoid valve 207 for controlling the flow direction of the hydraulic oil in the hydraulic cylinder 201. The three-position four-way solenoid valve 207 is electrically connected to the central control unit. A piston 2011 is slidingly provided inside the hydraulic cylinder 201 to divide the inner cavity of the hydraulic cylinder 201 into a rodless cavity 2012 and a rod cavity 2013. A hydraulic rod 2014 is fixedly provided on the piston 2011 and extends out of the hydraulic cylinder 201. The hydraulic rod 2014 is fixedly connected to the second lifting frame 102.

[0033] Through the above settings, when the central control unit receives the signal from the touch switch group 305, it transmits different electrical signals to the three-position four-way solenoid valve 207, changes the flow direction of the hydraulic oil through the three-position four-way solenoid valve 207, and then controls the extension and retraction of the hydraulic cylinder 201, thereby being able to adjust the position of the second lifting frame 102.

[0034] In order to retract and reverse the hydraulic cylinder 201, in this embodiment, Figure 2 and Figure 5 As shown, the middle position K1 of the three-position four-way solenoid valve 207 is "M type", and the middle position of the three-position four-way solenoid valve 207 is provided with port A, port B, port P, and port T. The port B is connected to the oil circuit on one side of the rod chamber 2013, and the port A is connected to the oil circuit on one side of the rodless chamber 2012. When the middle position K1 is working, port P is connected to port T. The two sides of the three-position four-way solenoid valve 207 are K2 and K3 respectively. When the K2 position is working, port A is connected to port T, and port B is connected to port P. When the K3 position is working, port P is connected to port A, and port B is connected to port T. When the first touch switch 3051 is closed, the central control unit controls K1 to work, when the second touch switch 3052 is closed, the central control unit controls K2 to work, and when the third touch switch 3053 is closed, the central control unit controls K3 to work.

[0035] Through the above arrangement, when the first touch switch 3051 is closed, K1 works, oil enters from port P and exits from port T, and the supply of hydraulic oil to the hydraulic cylinder 201 is stopped; when the second touch switch 3052 is turned on, K2 works, port P is connected to port B to supply oil to the side of the rod chamber 2013, thereby retracting the hydraulic rod 2014 into the hydraulic cylinder 201, and the hydraulic oil inside the rodless chamber 2012 flows out through port A and port T; when the third touch switch 3053 is closed, K3 works, and oil is supplied to the rodless chamber 2012 through port P and port A, the hydraulic rod 2014 extends out of the hydraulic cylinder 201, and the hydraulic oil inside the rod chamber 2013 flows out through port B and port T.

[0036] In order to realize the operation of the hydraulic system 200, in this embodiment, as Figure 2 and Figure 3 As shown, the hydraulic system 200 also includes an oil tank 202, a hydraulic pump 204, and a motor 205. The hydraulic pump 204 is installed on the oil tank 202. An oil suction pipe is connected between the hydraulic pump 204 and the oil tank 202. An oil delivery pipe is connected between the hydraulic pump 204 and the P port of the three-position four-way solenoid valve 207. An oil return pipe is connected between the T port of the three-position four-way solenoid valve 207 and the oil tank 202. The output end of the motor 205 is fixedly connected to the input end of the hydraulic pump 204 to provide power for the operation of the hydraulic pump 204.

[0037] Through the above arrangement, the driving motor 205 drives the hydraulic pump 204 to work, and then absorbs the hydraulic oil inside the oil tank 202 through the oil suction pipe. The hydraulic pump 204 delivers the hydraulic oil to the three-position four-way solenoid valve 207 through the oil delivery pipe, and the return of the hydraulic oil in the hydraulic system 200 is realized through the return oil pipe.

[0038] In order to prevent the oil pipe from bursting due to excessive pressure inside the hydraulic system 200, in this embodiment, Figure 3 and Figure 5 As shown, the hydraulic system 200 further includes a relief valve 206 , which is installed between the hydraulic pump 204 and a three-position four-way solenoid valve 207 , and an oil pipe is connected between the relief valve 206 and the oil tank 202 .

[0039] Through the above arrangement, when the pressure in the oil pipe of the hydraulic system 200 is lower than the pressure of the relief valve 206, the hydraulic oil at the output end of the hydraulic pump 204 flows to the P port of the three-position four-way solenoid valve 207 through the relief valve 206; when the internal pressure of the oil pipe in the hydraulic system 200 is higher than the pressure limited by the relief valve 206, the relief valve 206 opens, and the hydraulic oil at the output end of the hydraulic pump 204 flows to the oil tank 202 through the relief valve 206, thereby realizing the pressure unloading of the hydraulic system 200 and maintaining the stable operation of the hydraulic system 200.

[0040] In order to filter the residual impurities in the hydraulic oil circulation process, in this embodiment, Figure 2 , Figure 3 and Figure 5 As shown, the hydraulic system 200 further includes a filter 203 , which is installed between the oil tank 202 and the hydraulic pump 204 .

[0041] Through the above arrangement, the hydraulic oil entering the hydraulic system 200 is filtered through the filter 203 to prevent the residue in the hydraulic oil from circulating in the hydraulic system 200 and to prevent the hydraulic system 200 from being blocked by the residual impurities.

[0042] Implementation principle: In the initial state, the float 303 is located in the middle position of the guide rod 302, the spring 304 is in a free state, the float 303 is in contact with the first touch switch 3051, the first touch switch 3051 is closed to transmit a signal to the central control unit, and K1 of the three-position four-way solenoid valve 207 starts to work to maintain the balance of the spreader body 100. When operating containers or other goods, the spreader body 10 and the entire cargo are offset in gravity, causing the spreader body 100 to tilt. At this time, the float 303 inside the monitoring box 301 is floated to the rising side by the buoyancy, thereby triggering the second touch switch 3052 or the third touch switch 3053 to close, thereby transmitting a signal to the central control unit, and the central control unit controls the K2 or K3 position of the three-position four-way solenoid valve 207 to work, thereby switching the hydraulic cylinder 201 The internal hydraulic oil flows, thereby driving the second lifting frame 102 to move closer to or away from the first lifting frame 101, realizing the readjustment of the center of gravity position, so that the sling body 100 is restored to a balanced state. At this time, the float 303 is re-engaged with the first touch switch 3051, and the K1 position of the three-position four-way solenoid valve 207 is operated, and the supply of hydraulic oil to the hydraulic cylinder 201 is stopped. The hydraulic oil inside the hydraulic cylinder 201 is sealed to prevent the hydraulic rod 2014 from continuing to extend and retract. The hydraulic oil flows in from the P port and flows back to the oil tank from the T port. There is no need to shut down the hydraulic pump 204. When the center of gravity of the sling body 100 is offset again due to external factors, the hydraulic system 200 can respond quickly at this time, quickly adjust the position of the second lifting frame 102, and restore the balance of the sling body 100.

[0043] The above are only typical examples of the present invention. In addition, the present invention may have many other specific implementations. Any technical solutions formed by equivalent replacement or equivalent transformation shall fall within the scope of protection required by the present invention.

Claims

1. An integrated sling hydraulic system for a high-stability bridge crane, comprising a sling body (100) and a sling frame mounted on the sling body (100), characterized in that: The lifting frame comprises a first lifting frame (101) and a second lifting frame (102); the first lifting frame (101) is fixedly mounted on a first end of a lifting device body (100); the second lifting frame (102) is movably mounted on a second end of the lifting device body (100); the lifting device body (100) is provided with a tilt monitoring system (300) for monitoring the tilt direction of the lifting device body (100); the lifting device body (100) is provided with a hydraulic system (200) for adjusting the position of the second lifting frame (102); a central control unit is mounted on the lifting device body (100); and both the tilt monitoring system (300) and the hydraulic system (200) are electrically connected to the central control unit; The tilt monitoring system (300) comprises a monitoring box (301), a guide rod (302), a float (303) and a touch switch group (305), wherein the touch switch group (305) is electrically connected to the central control unit, the monitoring box (301) is fixedly mounted on the sling body (100), the inner cavity of the monitoring box (301) is filled with water, the guide rod (302) is fixedly mounted on the inner cavity side wall of the monitoring box (301), and the axis of the guide rod (302) is aligned with the sling body (100). The length direction of the monitoring box body (100) is consistent, the float (303) is sleeved on the guide rod (302) and is slidably connected, the touch switch group (305) includes a first touch switch (3051), a second touch switch (3052), and a third touch switch (3053) distributed along the axial direction of the guide rod (302), the first touch switch (3051) is located in the middle of the upper end of the monitoring box (301), and the second touch switch (3052) is close to the first lifting frame (101). ), the third touch switch (3053) is close to the second lifting frame (102), when the float (303) abuts against the first touch switch (3051), the first touch switch (3051) is closed, and a signal that the sling body (100) is in a balanced state is transmitted to the central control unit, and when the float (303) abuts against the second touch switch (3052), the second touch switch (3052) transmits a signal to the central control unit, and the central control unit controls the hydraulic system (200) to drive the second lifting frame (102). The lifting frame (102) moves toward the first lifting frame (101), and when the float (303) abuts against the third touch switch (3053), the third touch switch (3053) transmits a signal to the central control unit, and the central control unit controls the hydraulic system (200) to drive the second lifting frame (102) to move away from the first lifting frame (101); a slide groove (103) is provided on the lifting device body (100), and the second lifting frame (102) is slidably installed in the slide groove (103).

2. The integrated sling hydraulic system of a high-stability bridge crane according to claim 1 is characterized in that: A limit spring (304) is sleeved on the guide rod (302), a first end of the limit spring (304) is fixed to the inner wall of the monitoring box (301), and a second end of the limit spring (304) is fixed to the float (303).

3. The integrated sling hydraulic system of a high-stability bridge crane according to claim 1 is characterized in that: The hydraulic system (200) comprises a hydraulic cylinder (201) and a three-position four-way solenoid valve (207) for controlling the flow direction of hydraulic oil in the hydraulic cylinder (201); the three-position four-way solenoid valve (207) is electrically connected to a central control unit; and the output end of the hydraulic cylinder (201) is fixedly connected to a second lifting frame (102).

4. The integrated sling hydraulic system of a high-stability bridge crane according to claim 3 is characterized in that: The middle position of the three-position four-way solenoid valve (207) is "M type".

5. The integrated sling hydraulic system of a high-stability bridge crane according to claim 1 is characterized in that: The hydraulic system (200) also includes a relief valve (206).

6. The integrated sling hydraulic system of a high-stability bridge crane according to claim 1 is characterized in that: The hydraulic system (200) further comprises a filter (203).

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