Scrap steel smelting furnace lifting appliance

Abstract

The invention belongs to the technical field of lifting appliance equipment, and particularly relates to a waste steel smelting furnace lifting appliance which comprises a lifting beam assembly, a first lifting hook assembly, a second lifting hook assembly and a driving assembly. The hanging beam assembly comprises an equilateral triangle plate-shaped mounting plate; the first lifting hook assembly is arranged on the mounting plate, is used for carrying out first grabbing on the smelting furnace, and comprises fixing frames which are fixedly mounted at the top of the mounting plate at equal intervals in a surrounding manner by taking the vertical axis of the mounting plate as the center; the device has a double grabbing function, the first lifting hook assembly and the second lifting hook assembly form two-way grabbing, the grabbing stability of the smelting furnace is enhanced, the sliding risk is reduced, the driving assembly can control the first lifting hook assembly and the second lifting hook assembly to synchronously grab / loosen, the grabbing force of the first lifting hook assembly and the second lifting hook assembly on the smelting furnace becomes large / small at the same time, and the grabbing efficiency is improved. According to the grabbing device, stress unbalance in the grabbing process can be reduced, the hoisting safety is improved, the self-locking performance is good, accidental loosening caused by external force in the grabbing process can be reduced, and the safety and the grabbing stability are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hoist equipment, in particular to a scrap steel smelting furnace hoist. BACKGROUND

[0002] At present, the common scrap steel smelting furnace in the market is mostly 1-10 kg, which does not need a hoist, and the sample can be manually carried after completely cooling. With the change of production demand, the user's requirement for sample representation is improved, and Zhanjiang Iron and Steel uses the first 80 kg level scrap steel smelting furnace in China. The weight cannot manually carry the scrap steel, so a hoist specially for the 80 kg scrap steel smelting furnace is urgently needed. SUMMARY

[0003] This section aims to summarize some aspects of the embodiments of the present application and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract and title of the specification to avoid obscuring the purpose of this section, abstract and title, and such simplifications or omissions cannot be used to limit the scope of the present application.

[0004] To solve the above technical problems, according to one aspect of the present application, the present application provides the following technical scheme:

[0005] A scrap steel smelting furnace hoist, comprising a beam assembly, a first hook assembly, a second hook assembly and a driving assembly;

[0006] The beam assembly comprises an equilateral triangular plate-shaped mounting plate;

[0007] The first hook assembly is arranged on the mounting plate and is used to implement the first grabbing of the smelting furnace, comprising a fixed frame fixedly arranged on the top of the mounting plate in a ring around the vertical axis of the mounting plate at equal intervals, a first connecting rod rotatably arranged on each fixed frame, and a first grabbing arm fixedly arranged at the other end of each first connecting rod;

[0008] The second hook assembly is arranged on the first hook assembly and is used to implement the second grabbing of the smelting furnace, comprising a second grabbing arm rotatably arranged at the end of each first grabbing arm away from the first connecting rod;

[0009] The driving assembly is arranged on the beam assembly and is used to control the first hook assembly and the second hook assembly to synchronously grab / release the smelting furnace, and the grabbing force of the first hook assembly and the second hook assembly on the smelting furnace simultaneously increases / decreases.

[0010] As a preferred scheme of the scrap steel smelting furnace lifting appliance, the lifting beam assembly further comprises a mounting shell detachably mounted on the top of the mounting plate, the mounting shell is in the shape of an equilateral triangular hollow body with an open bottom wall, the mounting shell and the mounting plate are consistent in the projection in the top view, vertical screws are screwed through the top of the mounting shell near the three top corners thereof, the lower ends of the screws are screwed through the three top corners of the mounting plate and are screwed with nuts, a lifting appliance connecting rod is fixedly arranged on the top of the mounting shell, and the top end of the lifting appliance connecting rod is provided with an assembling piece, which is a flange piece.

[0011] As a preferred scheme of the scrap steel smelting furnace lifting appliance, the mounting plate is provided with three mounting frames, the mounting frames are arranged on the top of the three edges of the mounting plate, the inner side of each mounting frame is rotatably provided with a first rotating shaft through a bearing, the shaft body of the first rotating shaft is fixedly connected with the end of the first connecting rod, and the first grabbing arm is provided with a first anti-skid layer on the side facing the smelting furnace.

[0012] As a preferred scheme of the scrap steel smelting furnace lifting appliance, the first grabbing arm is provided with a U-shaped mounting opening in the end close to the second grabbing arm, the inner side of the mounting opening is rotatably provided with a second rotating pin through a bearing, the shaft body of the second rotating pin is fixedly connected with the end of the second grabbing arm, and the second grabbing arm is provided with a second anti-skid layer on the side facing the smelting furnace.

[0013] As a preferred scheme of the scrap steel smelting furnace lifting appliance, the driving assembly comprises a vertical servo motor fixedly arranged on the top center of the mounting shell, the output shaft of the servo motor is rotatably penetrated through the top wall of the mounting shell through a bearing, the output shaft of the servo motor is fixedly connected with a vertical rotating rod through a shaft coupling, the lower end of the rotating rod is rotatably penetrated through the bottom wall of the mounting plate through a bearing, the lower end of the rotating rod is fixedly arranged with a vertical self-locking screw coaxial with the rotating rod, the shaft body of the self-locking screw is screwingly and drivably provided with an annular lifting transmission member, the thread angle of the self-locking screw is smaller than the equivalent friction angle, each first connecting rod is hingedly provided with a third connecting rod on the side facing the lifting transmission member, the other ends of all the third connecting rods are hingedly arranged on the outer side of the lifting transmission member, and all the third connecting rods are equidistantly and circumferentially arranged around the lifting transmission member.

[0014] As a preferred scheme of the scrap smelting furnace lifting appliance, the driving assembly further comprises a hollow rotating cylinder rotatably arranged on the center of the top wall of the mounting plate in the vertical direction, the rotating rod is arranged in line with the central axis of the rotating cylinder, and the outer side wall of the rod body of the rotating rod is rotatably penetrated into the inner side of the rotating cylinder, the outer side of the rod body of the rotating cylinder is fixedly provided with a hollow worm, the inner side of each fixed frame is rotatably provided with a third rotating pin, the middle part of the rod body of each third rotating pin is fixedly provided with a worm wheel engaged with the worm, the lead angle of the worm is smaller than the equivalent friction angle between the engaged gear teeth, the rod body of each third rotating pin is further fixedly provided with a fourth connecting rod, the other end of the fourth connecting rod is rotatably provided with a fifth connecting rod, and the upper side of one end of the first grabbing arm is fixedly provided with a fixed seat.

[0015] As a preferred scheme of the scrap smelting furnace lifting appliance, the fourth connecting rod is arranged above the first connecting rod, the fifth connecting rod is arranged above the first grabbing arm, and the side wall of the mounting plate and the mounting shell is provided with a movable opening for the movement of the first connecting rod and the fourth connecting rod.

[0016] As a preferred scheme of the scrap smelting furnace lifting appliance, the driving assembly further comprises a variable speed assembly, the variable speed assembly is used to drive the rotating cylinder to rotate through the variable speed assembly after speed change when the servo motor drives the rotating rod to rotate.

[0017] As a preferred scheme of the scrap smelting furnace lifting appliance, the variable speed assembly comprises a transmission rod rotatably arranged on the inner top wall of the mounting shell, the rod body of the rotating rod is fixedly provided with a first variable speed gear, the rod body of the transmission rod is fixedly provided with a second variable speed gear engaged with the first variable speed gear, the diameter of the second variable speed gear is greater than that of the first variable speed gear, the rod body of the transmission rod is further fixedly provided with a third variable speed gear with a diameter smaller than that of the second variable speed gear, the outer side of the rotating cylinder is fixedly provided with a fourth variable speed gear engaged with the third variable speed gear, and the diameter of the fourth variable speed gear is greater than that of the third variable speed gear.

[0018] The scrap smelting furnace lifting appliance has the following beneficial effects:

[0019] 1. The first hook assembly and the second hook assembly form two grasps, enhancing the stability of the grasp on the smelting furnace and reducing the risk of slipping: when grasping, the three first grasping arms form a first ring-shaped grasp from the outside of the smelting furnace; at the same time as the action of the first grasping arms, the second grasping arms form a second grasp from a position closer to the furnace body, cooperating with the first grasping arms to form a double-wrapped clamping. The two-grasp structure exerts force on the smelting furnace from different positions and angles, greatly improving the stability of the overall grasp, even if one of the grasps is slightly loose, the other grasp can still provide effective restraint, significantly reducing the risk of the smelting furnace slipping.

[0020] 2. The drive assembly can control the first and second hook assemblies to grasp / slip synchronously, and the grasping force of the two on the smelting furnace simultaneously increases / decreases, facilitating operation, reducing force imbalance during grasping, and improving hoisting safety: the synchronous control mechanism ensures that the first and second hook assemblies simultaneously fold inward and increase in force when grasping, and simultaneously open outward and decrease in force when releasing. When operating, only the forward and reverse rotation of the servo motor is controlled to complete the synchronous action of double grasping, simplifying the operation process. Since the action and force of the two are completely synchronized, the force imbalance of the smelting furnace caused by the lagging action of one component or inconsistent force is avoided, preventing the furnace body from tilting and shaking, and improving the safety of the hoisting process from the operation coordination.

[0021] 3. Good self-locking performance, reducing accidental loosening caused by external forces during grasping, improving safety and grasping stability: two self-locking structures lock the grasping state of the first and second hook assemblies, effectively preventing accidental loosening caused by vibration, inertia or other external forces during grasping, ensuring long-term stability of grasping and providing continuous and reliable safety protection for the hoisting process. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the present application will be described in detail below with reference to the drawings and detailed embodiments. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor. Among them:

[0023] Figure 1 is a structural schematic diagram of the present application;

[0024] Figure 2 is a structural schematic diagram of the present application Figure 1 inside the mounting shell;

[0025] Figure 3 is a structural schematic diagram of the present application Figure 2 from the side view direction;

[0026] Figure 4 Structure diagram of partial components of the first hook assembly and driving assembly of the present application;

[0027] Figure 5 Structure diagram of partial components of the present application Figure 4 Structure diagram of the side elevation direction;

[0028] Figure 6 Structure diagram of the present application Figure 4 Structure diagram of the top view direction;

[0029] Figure 7 Structure diagram of partial components of the present application Figure 2

[0030] Figure 8 Structure diagram of the rotating rod, self-locking screw and other components of the present application;

[0031] Figure 9 Structure diagram of the rotating cylinder, speed changing assembly and other components of the present application.

[0032] In the figure: hoisting beam assembly-100; mounting plate-101; mounting shell-102; screw-103; nut-104; hoist connecting rod-105; assembly-106; movable port-107; first hook assembly-200; fixed frame-201; first connecting rod-202; first grabbing arm-203; first rotating shaft-204; first anti-skid layer-205; second hook assembly-300; second grabbing arm-301; mounting port-302; second rotating pin-303; second anti-skid layer-304; driving assembly-400; servo motor-401; rotating rod-402; self-locking screw-403; lifting transmission member-404; third connecting rod-405; rotating cylinder-406; worm-407; third rotating pin-408; worm gear-409; fourth connecting rod-410; fifth connecting rod-411; fixed seat-412; speed changing assembly-500; transmission rod-501; first speed changing gear-502; second speed changing gear-503; third speed changing gear-504; fourth speed changing gear-505. DETAILED DESCRIPTION

[0033] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0034] In the following description, a lot of specific details are set forth in order to give a thorough understanding of the present application, but the present application can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without departing from the spirit of the present application, so the present application is not limited to the specific embodiments disclosed below.

[0035] ​Secondly, the application is described in detail in combination with the schematic diagram, in the detailed description of the embodiments of the application, for the convenience of description, the sectional view showing the structure of the device will be partially enlarged without the general proportion, and the schematic diagram is only an example, which should not limit the scope of protection of the application herein. In addition, the three-dimensional spatial dimensions of length, width and depth should be included in actual production.

[0036] In order to make the purpose, technical scheme and advantages of the application more clear, the embodiments of the application will be further described in detail below in combination with the drawings.

[0037] Please refer to Figures 1-9 , which shows the structural schematic diagram of an embodiment of the waste steel smelting furnace lifting appliance of the application, please refer to Figures 1-9 , a waste steel smelting furnace lifting appliance is introduced in detail.

[0038] Embodiment 1, a waste steel smelting furnace lifting appliance, comprising a lifting beam assembly 100, a first lifting hook assembly 200, a second lifting hook assembly 300 and a driving assembly 400;

[0039] The lifting beam assembly 100 comprises an equilateral triangular plate-shaped mounting plate 101, and the equilateral triangular plate-shaped mounting plate 101 is helpful to improve the structural symmetry and force balance of the lifting beam assembly 100;

[0040] The first lifting hook assembly 200 is arranged on the mounting plate 101 and is used to implement the first grabbing of the smelting furnace, comprising a fixed frame 201 fixedly arranged on the top of the mounting plate 101 in a equidistant and surrounding manner with the vertical axis of the mounting plate 101 as the center, a first connecting rod 202 rotatably arranged on each fixed frame 201, and a first grabbing arm 203 fixedly arranged at the other end of each first connecting rod 202;

[0041] The second lifting hook assembly 300 is arranged on the first lifting hook assembly 200 and is used to implement the second grabbing of the smelting furnace, comprising a second grabbing arm 301 rotatably arranged at the end of each first grabbing arm 203 away from the first connecting rod 202, and the first lifting hook assembly 200 and the second lifting hook assembly 300 form two grabbings, which can enhance the grabbing stability of the smelting furnace;

[0042] The driving assembly 400 is arranged on the lifting beam assembly 100 and is used to control the first lifting hook assembly 200 and the second lifting hook assembly 300 to synchronously grab / release the smelting furnace, and the grabbing force of the first lifting hook assembly 200 and the second lifting hook assembly 300 on the smelting furnace changes simultaneously, the driving assembly 400 controls the synchronous grabbing / release and the simultaneous change of the force of the two, which is convenient for operation and can reduce the unbalanced force in the grabbing process, and improves the lifting safety to a certain extent.

[0043] Further, the hanging beam assembly 100 further comprises a mounting shell 102 detachably mounted on the top of the mounting plate 101, the mounting shell 102 is in the shape of an equilateral triangular hollow body with an open bottom wall, the mounting shell 102 and the mounting plate 101 are consistent in the projection in the top view, and the two are consistent in the projection in the top view, so as to enhance the connection stability of the overall structure; the top of the mounting shell 102 is provided with a vertical screw 103 penetratingly screwed near the three top corners thereof, the lower end of the screw 103 is penetratingly screwed through the three top corners of the mounting plate 101 and is screwed with a nut 104, the mounting shell 102 is detachably connected with the mounting plate 101, so as to facilitate the maintenance and maintenance of the internal components; the top of the mounting shell 102 is fixedly provided with a sling connecting rod 105, the top end of the sling connecting rod 105 is provided with an assembling piece 106, the assembling piece 106 is a flange piece, the assembling piece 106 facilitates the connection with external hoisting equipment, and the adaptability of the sling is improved.

[0044] Further, the fixing frame 201 is in the shape of "U" and is provided with three, the three fixing frames 201 are respectively fixed on the top of the three edges of the mounting plate 101, the inner side of the fixing frame 201 is rotatably provided with a first rotating shaft 204 through a bearing, the shaft body of the first rotating shaft 204 is fixedly connected with the end portion of the first connecting rod 202, the three "U"-shaped fixing frames 201 are arranged corresponding to the three edges of the mounting plate 101, and the stable rotation of the first connecting rod 202 is realized in cooperation with the first rotating shaft 204, which is helpful to the force balance of the first grabbing arm 203.

[0045] Further, the first grabbing arm 203 is provided with a "U"-shaped mounting port 302 in the inner recess near one end of the second grabbing arm 301, the inner side of the mounting port 302 is rotatably provided with a second rotating pin 303 through a bearing, the shaft body of the second rotating pin 303 is fixedly connected with the end portion of the second grabbing arm 301, the second grabbing arm 301 rotates in the "U"-shaped mounting port 302 through the second rotating pin 303, and the activity flexibility of the second grabbing arm 301 is improved; the second grabbing arm 301 is provided with a second anti-skid layer 304 on the side facing the smelting furnace, and the second anti-skid layer 304 cooperates with the first anti-skid layer 205 to further enhance the friction force during grabbing and improve the reliability of double grabbing.

[0046] In the embodiment 2, on the basis of the embodiment 1, the driving assembly 400 comprises a vertical servo motor 401 fixed at the top center of the mounting shell 102, the output shaft of the servo motor 401 is rotatably penetrated through the top wall of the mounting shell 102 via a bearing, and the output shaft is fixedly connected with a vertical rotating rod 402 via a shaft coupling, the lower end of the rotating rod 402 is rotatably penetrated through the bottom wall of the mounting plate 101 via a bearing, the lower end of the rotating rod 402 is fixedly provided with a vertical self-locking screw rod 403 coaxial with the rotating rod 402, the screw rod 403 is screwingly provided with an annular lifting transmission member 404 on the rod body, the thread angle of the screw rod 403 is smaller than the equivalent friction angle, each first connecting rod 202 is hingedly provided with a third connecting rod 405 on the side facing the lifting transmission member 404, the other ends of all the third connecting rods 405 are hingedly connected to the outside of the lifting transmission member 404, and all the third connecting rods 405 are equidistantly arranged around the lifting transmission member 404 as the center. The servo motor 401 provides power, drives the lifting transmission member 404 to lift through the rotating rod 402 and the self-locking screw rod 403, cooperates with the third connecting rod 405 to drive the first connecting rod 202 to rotate, and realizes the automatic opening and closing of the first grabbing arm 203. The self-locking characteristic of the self-locking screw rod 403 can reduce accidental loosening caused by external force during grabbing, and improve safety. The symmetrical distribution of the plurality of third connecting rods 405 helps the synchronous action of the first grabbing arm 203 and reduces the stress deviation.

[0047] Further, the driving assembly 400 further comprises a vertical hollow rotating cylinder 406 rotatably mounted at the top center of the mounting plate 101, the rotating rod 402 is arranged in line with the central axis of the rotating cylinder 406, and the outer wall of the rod body of the rotating rod 402 is rotatably penetrated through the inner side of the rotating cylinder 406, the outer side of the rod body of the rotating cylinder 406 is fixedly provided with a hollow worm 407, the inner side of each fixed frame 201 is rotatably provided with a third rotating pin 408 via a bearing, the middle part of the rod body of each third rotating pin 408 is fixedly provided with a worm wheel 409 engaged with the worm 407, and the lead angle of the worm 407 is smaller than the equivalent friction angle between the engaged teeth, the rod body of each third rotating pin 408 is further fixedly provided with a fourth connecting rod 410, the other end of the fourth connecting rod 410 is rotatably provided with a fifth connecting rod 411, the upper side of the end of the second grabbing arm 301 close to the first grabbing arm 203 is protrusively and fixedly provided with a fixed seat 412, the other end of the fifth connecting rod 411 is rotatably connected with the fixed seat 412, the rotating cylinder 406 drives the worm 407 to engage and transmit with the worm wheel 409, drives the second grabbing arm 301 to rotate through the third rotating pin 408, the fourth connecting rod 410 and the fifth connecting rod 411, and realizes the cooperative action of the second grabbing arm 301 and the first grabbing arm 203. The self-locking characteristic of the worm 407 can reduce the accidental displacement of the second grabbing arm 301 and enhance the grabbing stability.

[0048] Further, the fourth connecting rod 410 is spaced above the first connecting rod 202, the fifth connecting rod 411 is spaced above the first grabbing arm 203, the side wall of the mounting plate 101 and the mounting shell 102 is provided with a moving port 107 for the movement of the first connecting rod 202 and the fourth connecting rod 410, the fourth connecting rod 410 and the first connecting rod 202, the fifth connecting rod 411 and the first grabbing arm 203 are spaced, cooperate with the moving port 107, can avoid the mutual interference when each component moves, improve the transmission fluency; at the same time, it is helpful to reduce the friction loss between components and prolong the service life.

[0049] In embodiment 3, on the basis of embodiment 2, further comprising a speed change assembly 500, the speed change assembly 500 is used for driving the rotating cylinder 406 to rotate through the speed change assembly 500 after speed change when the servo motor 401 drives the rotating rod 402 to rotate, the speed change assembly 500 can adjust the speed ratio of the rotating cylinder 406 and the rotating rod 402, so as to facilitate the manufacturer to match appropriate speed change assembly 500 according to the required action amplitude or speed of the first hook assembly 200 and the second hook assembly 300 before leaving the factory.

[0050] Further, the speed change assembly 500 comprises a transmission rod 501 rotatably arranged on the top wall of the mounting shell 102 through a bearing, the rod body of the rotating rod 402 is fixedly provided with a first speed change gear 502, the rod body of the transmission rod 501 is fixedly provided with a second speed change gear 503 engaging with the first speed change gear 502, the diameter of the second speed change gear 503 is greater than that of the first speed change gear 502, the rod body of the transmission rod 501 is further fixedly provided with a third speed change gear 504 with a diameter smaller than that of the second speed change gear 503, the outer side of the rotating cylinder 406 is fixedly provided with a fourth speed change gear 505 engaging with the third speed change gear 504, the diameter of the fourth speed change gear 505 is greater than that of the third speed change gear 504, the transmission rod 501 and the first to fourth speed change gears 502-505 realize speed change through gear engagement, and the rotating speed of the rotating cylinder 406 is adjusted through the combination of gears with different diameters.

[0051] The use mode of the device: before use, each part needs to be inspected, including confirming that the mounting plate 101 and the mounting shell 102 are connected firmly by the screw 103 and the nut 104, without looseness and rust; the edge of the movable port 107 is not deformed to avoid hindering the movement of the components; the connecting part of the lifting tool connecting rod 105 and the assembly 106 is checked for no cracks and deformation, and the flange bolt hole is intact to ensure reliable connection with the external hoisting equipment; the fixed frame 201 is fixed firmly with the mounting plate 101, without displacement; the first rotating shaft 204 rotates smoothly, without jamming or abnormal sound, and the bearing is not excessively worn; the first grabbing arm 203 has no bending and cracking, the first anti-slip layer 205 has no falling and hardening, and the pattern is clear; the first connecting rod 202 is connected with the first grabbing arm 203 without looseness; the second grabbing arm 301 rotates flexibly in the mounting port 302 through the second rotating pin 303, without jamming, and the rotating pin has no deformation and rust; the second anti-slip layer 304 has no damage, and there is no misalignment with the first anti-slip layer 205; the appearance of the servo motor 401 is intact, the wire harness is not aged, the power-on test runs smoothly, and there is no abnormal noise; the rotating rod 402 and the rotating cylinder 406 have good coaxiality, and the rotation has no obvious shaking; the self-locking screw 403 and the lifting transmission member 404 have no foreign matter on the threaded surface, ensuring smooth movement of the lifting transmission member 404; the third connecting rod 405 has no looseness at the hinged part and rotates flexibly; the worm 407 and the worm gear 409 have no wear and foreign matter on the meshing surface, and the rotation has no abnormal sound; the third rotating pin 408 has no bending, and the fourth connecting rod 410, the fifth connecting rod 411 and the fixed seat 412 are connected firmly; the transmission rod 501 rotates smoothly without jamming; the first to fourth variable speed gears have normal meshing clearance, the tooth surface has no cracking and excessive wear, and there is no foreign matter such as metal debris.

[0052] After the inspection is completed, during use, the lifting tool is connected with the external hoisting equipment, such as a crane, through the assembly 106, at this time the first grabbing arm 203 and the second grabbing arm 301 are in an open state, facilitating the fitting into a smelting furnace, the servo motor 401 is started, the output shaft drives the rotating rod 402 to rotate, the self-locking screw 403 rotates with the rotating rod 402, drives the lifting transmission member 404 to lift, the first connecting rod 202 is pulled around the first rotating shaft 204 by the third connecting rod 405, the first grabbing arm 203 is inwardly folded, and the first anti-slip layer 205 is attached to the furnace body, completing the first grabbing.

[0053] The rotating rod 402 rotates through the first gear 502 to drive the second gear 503 and the transmission rod 501 to rotate, so that the third gear 504 drives the fourth gear 505 and the rotating cylinder 406 to rotate, drives the worm 407 on the rotating cylinder 406 to rotate, the worm 407 engages the worm gear 409, and the third rotating pin 408 rotates, and the second grabbing arm 301 is pulled to fold around the second rotating pin 303 through the fourth connecting rod 410 and the fifth connecting rod 411, the second anti-skid layer 304 is attached to the furnace body, the second grabbing is completed, and the two grabbing arms are synchronous action, the strength is increased at the same time, and the grabbing is stable.

[0054] After the grabbing is stable, the device is lifted away from the smelting furnace by an external device and is moved to a target position, the self-locking characteristics of the self-locking screw 403 and the worm 407 can reduce the risk of accidental loosening and ensure safety; after reaching the target position, the servo motor 401 reverses rotation, drives the rotating rod 402, the self-locking screw 403 and the rotating cylinder 406 to reverse motion: the lifting transmission member 404 reverses movement, pushes the first connecting rod 202 to make the first grabbing arm 203 open, the worm 407 reversely drives the worm gear 409 to drive the second grabbing arm 301 to open, the double grabbing is synchronous released, and the unloading is completed.

[0055] The device needs regular maintenance, including cleaning and dust removal, such as blowing the inside of the installation shell 102, the movable port 107 and the threaded groove of the self-locking screw 403 with compressed air to remove dust; wiping the surface of the first anti-skid layer 205 and the second anti-skid layer 304, stubborn stains can be cleaned with a neutral cleaner; lubrication and maintenance, such as adding high-temperature resistant grease to the bearings of the first rotating shaft 204, the second rotating pin 303 and the third rotating pin 408, and the hinge parts of the third connecting rod 405, the fourth connecting rod 410 and the fifth connecting rod 411, and applying gear special lubricating grease to the meshing surfaces of the worm 407 and the worm gear 409 and the meshing parts of the gear 502-505; a small amount of lubricating grease is applied to the threaded part of the self-locking screw 403 and the lifting transmission member 404 to reduce wear; and fastening and replacing parts, such as re-tightening the screws 103, the nuts 104 and the connecting bolts of the fixed frame 201 and the fixed seat 412 to prevent loosening; if the bearing is abnormal noise or jam, replace the same type of bearing; replace when the gear tooth surface wear exceeds the standard to ensure transmission accuracy.

[0056] The device also needs to be tested regularly for its functions, such as no-load test: including starting the servo motor 401, checking whether the first and second grabbing arms open and close smoothly without jamming; testing the self-locking function after power off to confirm that there is no accidental loosening. And load test: including testing hoisting with an analog load of about 80 kg, checking whether there is abnormal deformation or sound after the components are stressed to ensure the reliability of grabbing.

[0057] Although the present application has been described with reference to the embodiments above, various changes and modifications can be suggested to one skilled in the art, and it is intended that the present application encompass such changes and modifications as fall within the scope of the appended claims. Particularly, each feature disclosed in the description and / or the claims can be used in the combination with each of the features disclosed in the description and / or the claims, unless specifically stated otherwise. Therefore, the present application is not intended to be limited to the particular embodiments disclosed in the description and / or the claims.

Claims

1. A lifting device for a scrap steel smelting furnace, comprising a lifting beam assembly (100), a first hook assembly (200), a second hook assembly (300), and a drive assembly (400), characterized in that: The lifting beam assembly (100) includes an equilateral triangular plate-shaped mounting plate (101); The first hook assembly (200) is mounted on the mounting plate (101) for performing the first gripping of the smelting furnace. It includes a fixed frame (201) that is fixedly mounted on the top of the mounting plate (101) at equal intervals around the vertical axis of the mounting plate (101). A first connecting rod (202) is rotatably mounted on each fixed frame (201), and a first gripping arm (203) is fixedly mounted at the other end of each first connecting rod (202). The second hook assembly (300) is disposed on the first hook assembly (200) for performing a second gripping action on the smelting furnace, including a second gripping arm (301) rotatably disposed at the end of each first gripping arm (203) away from the first connecting rod (202). The drive assembly (400) is mounted on the lifting beam assembly (100) and is used to control the first hook assembly (200) and the second hook assembly (300) to simultaneously grip / release the smelting furnace, and the gripping force applied by the first hook assembly (200) and the second hook assembly (300) to the smelting furnace increases / decreases simultaneously.

2. The scrap steel smelting furnace lifting device according to claim 1, characterized in that: The lifting beam assembly (100) also includes a mounting shell (102) that can be detachably mounted on the top of the mounting plate (101). The mounting shell (102) is a hollow equilateral triangle with an open bottom wall. The mounting shell (102) and the mounting plate (101) are projected in the same direction from above. Vertical screws (103) are screwed through the top of the mounting shell (102) near its three apex. The lower end of the screws (103) is screwed through the three apex of the mounting plate (101) and screwed with nuts (104). A lifting rod (105) is fixedly mounted on the top of the mounting shell (102). An assembly (106) is provided at the top of the lifting rod (105). The assembly (106) is a flange.

3. The scrap steel smelting furnace lifting device according to claim 1, characterized in that: The fixing frame (201) is U-shaped and there are three of them. The three fixing frames (201) are respectively fixed to the top of the three sides of the mounting plate (101). The inner side of the fixing frame (201) is provided with a first rotating shaft (204) through a bearing. The shaft of the first rotating shaft (204) is fixedly connected to the end of the first connecting rod (202). The first gripping arm (203) is provided with a first anti-slip layer (205) on the side facing the smelting furnace.

4. The scrap steel smelting furnace lifting device according to claim 1, characterized in that: The first gripping arm (203) has a U-shaped mounting opening (302) recessed at one end near the second gripping arm (301). A second pivot pin (303) is rotatably provided on the inner side of the mounting opening (302) via a bearing. The rod of the second pivot pin (303) is fixedly connected to the end of the second gripping arm (301). A second anti-slip layer (304) is provided on the side of the second gripping arm (301) facing the smelting furnace.

5. The scrap steel smelting furnace lifting device according to claim 2, characterized in that: The drive assembly (400) includes a vertical servo motor (401) fixed at the top center of the mounting housing (102). The output shaft of the servo motor (401) rotates through the top wall of the mounting housing (102) via a bearing, and its output shaft is fixedly connected to a vertical rotating rod (402) via a coupling. The lower end of the rotating rod (402) rotates through the bottom wall of the mounting plate (101) via a bearing, and a vertical self-locking screw (403) coaxial with itself is fixedly provided at the lower end of the rotating rod (402). The self-locking screw (403) has an annular lifting transmission component (404) screwed onto its shaft. The thread helix angle of the self-locking screw (403) is less than the equivalent friction angle. Each of the first connecting rods (202) has a third connecting rod (405) hinged to the side facing the lifting transmission component (404). The other end of all the third connecting rods (405) is hinged to the outside of the lifting transmission component (404). All the third connecting rods (405) are arranged in a ring-shaped manner with the lifting transmission component (404) at equal intervals.

6. The scrap steel smelting furnace lifting device according to claim 5, characterized in that: The drive assembly (400) further includes a hollow rotating cylinder (406) vertically mounted at the center of the top wall of the mounting plate (101) via bearings. The rotating rod (402) is collinear with the central axis of the rotating cylinder (406), and the outer side wall of the rotating rod (402) rotates vertically through the inner side of the rotating cylinder (406). A hollow worm gear (407) is fixedly installed on the outer side of the rotating cylinder (406). A third pivot pin (408) is rotatably installed on the inner side of each fixing frame (201) via bearings. Each third pivot pin (408) A worm wheel (409) of a meshing worm (407) is fixedly installed in the middle of the rod body, and the lead angle of the worm (407) is smaller than the equivalent friction angle between the meshing teeth. A fourth link (410) is also fixedly installed on the rod body of each third pivot (408). A fifth link (411) is rotatably installed at the other end of the fourth link (410). A fixed seat (412) is fixedly installed on the upper side of the second gripping arm (301) near the first gripping arm (203). The other end of the fifth link (411) is rotatably connected to the fixed seat (412).

7. A scrap steel smelting furnace lifting device according to claim 6, characterized in that: The fourth link (410) is spaced above the first link (202), and the fifth link (411) is spaced above the first gripping arm (203). The side walls of the mounting plate (101) and the mounting shell (102) are provided with movable openings (107) for the first link (202) and the fourth link (410) to move.

8. A scrap steel smelting furnace lifting device according to claim 6, characterized in that: It also includes a speed change component (500), which is used to drive the rotating cylinder (406) to rotate after the servo motor (401) drives the rotating rod (402) to rotate.

9. A scrap steel smelting furnace lifting device according to claim 8, characterized in that: The transmission assembly (500) includes a transmission rod (501) rotatably mounted on the inner top wall of the mounting housing (102) via a bearing. A first transmission gear (502) is fixedly mounted on the shaft of the rotating rod (402). A second transmission gear (503) meshing with the first transmission gear (502) is fixedly mounted on the shaft of the transmission rod (501). The diameter of the second transmission gear (503) is larger than the diameter of the first transmission gear (502). A third transmission gear (504) with a smaller diameter than the second transmission gear (503) is also fixedly mounted on the shaft of the transmission rod (501). A fourth transmission gear (505) meshing with the third transmission gear (504) is fixedly mounted on the outer side of the rotating cylinder (406). The diameter of the fourth transmission gear (505) is larger than the diameter of the third transmission gear (504).

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