Method for improving bridge type grab bucket and installing vibration device

Abstract

A method for improving a bridge type grab bucket and installing a vibration device comprises the steps that (1) an electric vibrator is additionally arranged on the grab bucket; (2) a cable winder, a vibration variable-frequency governor and a winding variable-frequency governor are additionally arranged on the trolley hoisting platform; (3) a vibration adjusting knob and a rolling adjusting knob are additionally arranged on a cab combined operation table; the output of the vibration adjusting knob is connected to the vibration variable-frequency governor; the output of the winding adjusting knob is connected into the winding variable-frequency speed regulator; a starting switch of the winding variable-frequency speed regulator is connected into a control circuit of the hoisting winch; (4) winding synchronous adjustment is carried out; 5) adjusting the impact strength; the electric vibration grab bucket is convenient and fast to adjust, the system is easy to implement, similar pneumatic and hydraulic additional complex corollary equipment is not needed, the adjusting and controlling platform is integrated on a cab combined operation table, and operation is convenient and fast; power supply cables are synchronously wound and unwound, so that safety accidents are avoided; improvement is easy to implement, and production efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of coal transportation, in particular to a method for improving and installing a vibration device on a bridge-type grab bucket. Background Art

[0002] Since the opening of the coal transportation railway line, the coal arriving on the train has been severely frozen and loose during the severe cold weather in winter. The shallowest frozen layer is a dozen centimeters, and the entire carriage is completely frozen in the deepest. Due to the serious freezing and loose coal arriving on the train in winter, unloading has become more difficult and the unloading efficiency has decreased. This has become a bottleneck problem restricting the supply of raw coal and has posed a great threat to the stable production of enterprises.

[0003] At present, the bridge grab has a deadweight of 2.5 tons. When unloading frozen coal from a train, the grab cannot lift the frozen coal from the bottom of the train by its own weight. Other equipment can only be hired to clean the frozen coal from the bottom of the train, which increases the unloading cost and affects the unloading speed, resulting in delayed unloading and incurring delayed costs. Summary of the invention

[0004] The purpose of the present invention is to facilitate the improvement of the existing bridge grab and to provide a method for installing a vibration device on the bridge grab.

[0005] A method for improving and installing a vibration device on a bridge grab, wherein the bridge unloading grab equipment includes a cab, a large vehicle traveling mechanism, a small vehicle lifting platform, and a grab; characterized in that:

[0006] 1) An electric vibrator is added to the grab bucket; the electric vibrator is fixed to the grab bucket by welding or bolting;

[0007] 2) Cable reel, vibration frequency converter and reel frequency converter are added to the trolley lifting platform;

[0008] Fix the cable reel, vibration variable frequency speed regulator, and reeling variable frequency speed regulator at a suitable installation position on the trolley lifting platform; connect the power supply cable of the electric vibrator to the cable reel and wind it around the reel; the vibration variable frequency speed regulator and reeling variable frequency speed regulator are electrically connected to the vibration motor in the electric vibrator and the reeling motor in the cable reel respectively;

[0009] 3) Add vibration adjustment knob and reel adjustment knob on the joint operating console in the cab;

[0010] The output of the vibration adjustment knob is connected to the vibration frequency converter; the output of the winding adjustment knob is connected to the winding frequency converter; the starting switch of the winding frequency converter is connected to the control circuit of the hoisting winch;

[0011] 4) Synchronous adjustment of winding;

[0012] Start the hoisting winch to lift or lower the vibrating grab, use the winding adjustment knob to adjust the frequency of the winding motor drive power supply, and adjust the speed of the winding motor to synchronize the cable winding and releasing speed with the lifting speed;

[0013] 5) Impact force adjustment;

[0014] The grab bucket is dropped onto the frozen coal, and the vibration adjustment knob is used to adjust the vibration motor driving power frequency and the vibration motor speed to produce different impact intensities.

[0015] The beneficial effects of the present invention are:

[0016] Compared with the prior art, the device of the present application can realize an electric vibrating grab through improvement. It is easy to adjust and the system is easy to implement. It does not need to add complex supporting equipment like pneumatic and hydraulic ones. Its control platform is integrated into the joint operating table in the cab, which is easy to operate. The power supply cable is retracted and released synchronously to avoid safety accidents. The improvement plan is easy to implement and improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 System block diagram for installing a vibration device for bridge grab improvement.

[0018] In the figure: 1. Control platform 2. Vibration frequency converter 3. Winding frequency converter 4. Electric vibrator 5. Lifting control circuit DETAILED DESCRIPTION

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

[0020] A bridge type truck unloading grab bucket device comprises a cab, a truck traveling mechanism, a trolley lifting platform and a vibrating grab bucket.

[0021] The trolley traveling mechanism spans across both sides of the train track and moves along both sides of the track through the traveling wheels on both sides.

[0022] The upper part of the trolley traveling mechanism is connected with a bridge beam. The driving cab is located on one side of the bridge beam. The inner wall of the driving cab is provided with a joint operating platform.

[0023] The trolley lifting platform can move along the bridge beam. A lifting winch is installed on the trolley lifting platform. The lifting winch receives a control circuit signal to start rising or falling.

[0024] The vibrating grab comprises a grab hanger, a pulley block and a grabbing mechanism.

[0025] The grabbing mechanism includes two split grab shovels, which are hinged by a rotating shaft. A connecting rod support is also provided on the outer cylinder of the two grab shovels, and the connecting rod support is connected to the pulley block by a connecting rod. When the driving wheel in the pulley block rotates, the grab shovel is driven to rotate around the rotating shaft through the connecting rod to perform the opening and closing operation of the two grab shovels.

[0026] The lifting wheel in the pulley block is also connected to the lifting winch in the trolley lifting platform through a wire rope, and the wire rope hangs the vibrating grab bucket under the trolley lifting platform.

[0027] The pulley block and the grabbing mechanism are both installed on the grab bucket hanger.

[0028] An electric vibrator is also provided on the grab bucket hanger. The electric vibrator adopts a vibration motor to drive the eccentric rotating mechanism, which forms high-frequency vibration when rotating at high speed. The high-frequency vibration is transmitted to the tip of the grab bucket shovel, generating high-frequency impact, which is conducive to the grab bucket shovel breaking the ice and entering the frozen coal.

[0029] The trolley lifting platform is also equipped with a cable reel, a vibration frequency converter and a reeling frequency converter.

[0030] The power supply cable of the electric vibrator is connected to and wound on the drum in the cable reel. When the vibrating grab moves up and down, the cable reel is used to reel in and release the power supply cable in time to avoid accidents caused by the cable being too long or too short.

[0031] The vibration frequency conversion speed regulator and the winding frequency conversion speed regulator can provide output frequency conversion drive current, which is output to the vibration motor in the electric vibrator and the winding motor in the cable reel respectively.

[0032] The vibration frequency conversion speed regulator and the winding frequency conversion speed regulator are also connected to the control platform on the joint operating table in the cab, and the control platform is provided with a vibration intensity adjustment knob and a winding speed adjustment knob.

[0033] The output of the vibration intensity adjustment knob is connected to the vibration frequency converter, which can adjust the vibration motor drive power frequency and the vibration motor speed to produce different impact intensities.

[0034] The output of the winding speed adjustment knob is connected to the winding frequency converter, which can adjust the frequency of the winding motor drive power supply and the speed of the winding motor to synchronize the cable winding speed with the lifting speed.

[0035] The starting switch of the winding frequency conversion speed regulator adopts a relay normally open contact, and its relay coil is connected to the control circuit of the hoisting winch.

[0036] When the hoisting winch is lifting or lowering the vibrating grab bucket, the winding frequency converter can be controlled by the relay output to start working synchronously to reel in or release the cable, ensuring that the cable reeling work is performed simultaneously with the lifting operation.

[0037] In the process of specific transformation implementation,

[0038] 1) An electric vibrator is added to the grab hanger.

[0039] The electric vibrator uses a vibration motor to drive the eccentric rotating mechanism. The electric vibrator is fixed to the grab bucket hanger by welding or bolting.

[0040] 2) A cable reel, a vibration frequency converter and a reeling frequency converter are added to the trolley lifting platform.

[0041] The fixed cable reel, vibration frequency converter and reel frequency converter are installed at the appropriate installation position on the trolley lifting platform;

[0042] The power supply cable of the electric vibrator is connected to the cable reel and wound on the reel;

[0043] The vibration frequency conversion speed regulator and the winding frequency conversion speed regulator are electrically connected to the vibration motor in the electric vibrator and the winding motor in the cable winding device respectively.

[0044] 3) A vibration adjustment knob and a winding adjustment knob are added to the joint operating console in the cab.

[0045] The output of the vibration adjustment knob is connected to the vibration variable frequency speed regulator;

[0046] The output of the winding adjustment knob is connected to the winding frequency conversion speed regulator.

[0047] The starting switch of the winding frequency conversion speed regulator adopts a relay normally open contact, and the relay coil is connected to the control circuit of the hoisting winch.

[0048] 4) Synchronous adjustment of winding.

[0049] Start the hoisting winch to lift or lower the vibrating grab, use the winding adjustment knob to adjust the frequency of the winding motor drive power supply, and adjust the speed of the winding motor to synchronize the cable winding and releasing speed with the lifting speed.

[0050] 5) Impact force adjustment.

[0051] The vibrating grab is dropped onto the frozen coal, and the vibration adjustment knob is used to adjust the frequency of the vibration motor driving power supply, and the speed of the vibration motor is adjusted to produce different impact forces, so that the vibrating grab breaks the ice and enters the frozen coal.

[0052] After completing the installation and debugging of each unit of the equipment, the bridge crane can be used normally, and the vibrating grab can be used to improve the efficiency of grabbing coal. During use, the operator can adjust the impact intensity in time through the vibration adjustment knob according to the situation, which can ensure smooth coal feeding and avoid excessive vibration intensity that may damage the car body.

[0053] The device of the application can realize an electric vibrating grab through improvement. It is easy to adjust and the system is easy to implement. There is no need to add complex supporting equipment like pneumatic and hydraulic ones. The control platform is integrated into the joint operating table in the cab, which is easy to operate. The power supply cable is retracted and released synchronously to avoid safety accidents. The improvement plan is easy to implement and improves production efficiency.

[0054] Finally, it should be noted that the above description is only an explanation of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail, those skilled in the art can still modify the technical solutions described above or replace some of the technical features with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for improving and installing a vibration device on a bridge grab, wherein the bridge unloading grab equipment includes a cab, a large vehicle traveling mechanism, a small vehicle lifting platform, and a grab; characterized in that: 1) An electric vibrator is added to the grab bucket; the electric vibrator is fixed to the grab bucket by welding or bolting; 2) Cable reel, vibration frequency converter and reel frequency converter are added to the trolley lifting platform; Fix the cable reel, vibration frequency converter and reel frequency converter at suitable installation positions on the trolley lifting platform; connect the power supply cable of the electric vibrator to the cable reel and wind it on the reel; The vibration frequency conversion speed regulator and the winding frequency conversion speed regulator are electrically connected to the vibration motor in the electric vibrator and the winding motor in the cable winding device respectively; 3) Add vibration adjustment knob and reel adjustment knob on the joint operating console in the cab; The output of the vibration adjustment knob is connected to the vibration variable frequency speed regulator; The output of the winding adjustment knob is connected to the winding frequency converter; the starting switch of the winding frequency converter is connected to the control circuit of the hoisting winch; 4) Synchronous adjustment of winding; Start the hoisting winch to lift or lower the vibrating grab, use the winding adjustment knob to adjust the frequency of the winding motor drive power supply, and adjust the speed of the winding motor to synchronize the cable winding and releasing speed with the lifting speed; 5) Impact force adjustment; The grab bucket is dropped onto the frozen coal, and the vibration adjustment knob is used to adjust the vibration motor driving power frequency and the vibration motor speed to produce different impact intensities.

2. A method for improving and installing a vibration device on a bridge grab according to claim 1, characterized in that: The grab bucket includes a grab bucket hanger, a pulley block and a grab mechanism; the pulley block and the grab mechanism are both installed on the grab bucket hanger; In step 1), an electric vibrator is added to the grab bucket hanger, and the electric vibrator uses a vibration motor to drive an eccentric rotating mechanism.

3. The method for improving and installing a vibration device on a bridge grab bucket according to claim 1, characterized in that: In step 3), the start switch of the winding frequency conversion speed regulator adopts a relay normally open contact, and the relay coil is connected to the control circuit of the hoisting winch.

4. The method for improving and installing a vibration device for a bridge grab bucket according to claim 1, characterized in that: After completing the installation and debugging of each unit of the equipment, the bridge crane can be used normally, and the vibrating grab can be used to improve the efficiency of grabbing coal. The impact intensity can be adjusted in real time through the vibration adjustment knob during use.

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