Gripping tongs for calcium carbide

Abstract

The application belongs to the technical field of grab tongs and specifically discloses a grab tong for calcium carbide, which comprises a lifting frame, a lifting block, a lock hook, two L-shaped main beams and a locking mechanism, the lifting frame is in a back-shaped side vertical section and is fixedly connected with a lifting lug at the top, the lock hook is locked with the lifting frame through the locking mechanism, two first long holes are formed in the lifting frame, the lifting block is slidably connected with the lifting frame, a first fixing pin is penetrated through the lifting block, the first fixing pin is slidably connected with the first long hole, a base is fixedly connected with the bottom of the two L-shaped main beams, a fixing assembly is connected with the base, a cavity is arranged in the lifting block, a slot hole is formed in each L-shaped main beam, each L-shaped main beam is hingedly connected with a jaw, and each jaw is movably connected with the lifting block. Through cooperation of the lifting frame and the lifting block, the lock hook can be independently locked under the premise that the jaw and the lifting block are inconvenient to be lowered, the process of releasing the grab tongs is smooth and consecutive, the structure is ingenious, and the process of clamping the calcium carbide is more efficient and convenient.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of grabbing tongs, in particular to a grabbing tong for calcium carbide. BACKGROUND

[0002] In the process of calcium carbide cooling and hoisting, the calcium carbide needs to be taken out from the calcium carbide pot and hoisted to the designated cooling site for continuous cooling until the loading standard is reached. The calcium carbide clamping hoist used in the prior art is scissors-shaped. After the scissors-shaped clamping hoist is lowered to place the calcium carbide, it must continue to be lowered to lock the locking hook. The locking of the locking hook can make the jaw open to release the calcium carbide, so that the next calcium carbide clamping and hoisting operation can be smoothly carried out. However, if the clamped calcium carbide block is thin or there are other obstacles such as calcium carbide around the placement position during the process of placing the calcium carbide, the jaw has been abutted against the ground or other obstacles, and the lowering operation cannot be performed. The locking hook cannot be locked, and the jaw cannot release the calcium carbide. Artificial hooking of the locking hook is needed to assist the jaw to open to release the calcium carbide, so as to facilitate the subsequent lifting of the clamping hoist. In the case that the clamping hoist is blocked in releasing the calcium carbide, the clamping hoist wastes manpower and material resources, and reduces the efficiency of the calcium carbide clamping and hoisting process. SUMMARY

[0003] The purpose of the present application is to provide a grabbing tong for calcium carbide to solve the problem that when the calcium carbide is clamped and hoisted to the designated position, the tong is blocked from descending and cannot lock the locking hook, resulting in that the jaw cannot release the calcium carbide, and the tong cannot be lifted for the next calcium carbide clamping and hoisting operation.

[0004] To achieve the above-mentioned purpose, the basic scheme provided by the present application is: a grabbing tong for calcium carbide, comprising a lifting frame, a lifting block, a locking hook, two L-shaped main beams and a locking mechanism, the lifting frame is in a back-shaped cross section and a lifting lug is fixedly connected to the top of the lifting frame, the locking hook is locked with the lifting frame through the locking mechanism, two first long holes are formed in the lifting frame, the lifting block is slidably connected with the lifting frame, a first fixed pin is penetrated through the lifting block, the two ends of the first fixed pin are respectively penetrated through the first long holes and slidably connected with the first long holes, a base is fixedly connected to the bottom of each L-shaped main beam, a fixing assembly for fixing the locking hook is connected to the base, a cavity is arranged in the lifting block, a slot hole is formed in each L-shaped main beam, a jaw is hingedly connected to each L-shaped main beam, one end of each jaw near the lifting frame is penetrated through the slot hole and extends to the cavity of the lifting block, and each jaw is movably connected with the lifting block.

[0005] The principle and beneficial effects of the present application are that: when the lifting frame is hoisted or lowered, the force of the lifting lug and the lifting frame acts on the lifting block through the first fixed pin, and the lifting block is movably connected with the pincer to facilitate the pincer to be freely closed or opened, when the calcium is hoisted to the designated position, the scissors-shaped clamping hoist in the prior art must continue to be lowered after the calcium is placed to enable the locking hook to be locked, if the calcium block is relatively thin or there are other calcium obstacles around the placement position, the pincer has been abutted on the ground or other calcium obstacles, and the lowering operation cannot be performed to release the calcium to hook the locking hook manually to assist in lifting the clamping hoist, and the lifting frame in the present application can be lowered to lock the locking hook automatically when the lifting block and the pincer cannot be lowered, and when the lifting lug and the lifting frame are lifted, the pincer can be changed into a relaxed state by the force and is lifted, and the next clamping of calcium is performed; through the cooperation of the lifting frame and the lifting block, the locking hook can be locked automatically under the premise that the pincer and the lifting block cannot be lowered conveniently, the process of releasing the pincer is smooth and continuous, the structure is ingenious, and the process of clamping calcium is more efficient and convenient.

[0006] Scheme two, which is a preferred embodiment of the basic scheme, each of the pincers is provided with a second long hole, and the two ends of the lifting block are respectively penetrated by a second fixed pin, and each of the second fixed pins penetrates the second long hole and is in sliding connection with the second long hole; the second fixed pin slides in the second long hole along with the lifting of the lifting block, and the moving pair mechanical structure facilitates the opening and closing of the pincers.

[0007] Scheme three, which is a preferred embodiment of the basic scheme, the two sides of the base are respectively fixedly connected with supporting legs; during the clamping of calcium, the supporting legs are lowered to be placed on the upper surface of the calcium, preventing the pincer from being tilted as a whole, so that the pincers are lowered more stably, thereby clamping the calcium more stably.

[0008] Scheme four, which is a preferred embodiment of scheme three, the fixing assembly comprises a fixing seat and a rotating shaft, the fixing seat is fixedly connected to the base, the fixing seat is connected with two fixed blocks, the locking hook is arranged between the two fixed blocks, the rotating shaft is in rotational connection with the two fixed blocks and the locking hook, the two sides of the rotating shaft are respectively threadedly connected with nuts, and the nuts are in abutment with the fixed blocks; the fixing seat is fixed to the base, the base is connected with the L-shaped main beam, and the locking hook is connected to the fixing seat through the fixed blocks and the rotating shaft, so that the opening and closing states of the pincers can be changed when the locking hook is in the locked state or the unhooked state.

[0009] Scheme five, which is the preferred of scheme four, the locking mechanism includes a hanging table and a traction assembly for making the hook stable lap on the hanging table, the hanging table is fixed with the lifting frame, the hanging table is hinged with a flap, the end of the hook is lapped with the hanging table; the hook is lapped on the hanging table, so that the force of the lifting frame can be transmitted to the hook, and then to the base, so that the jaw is opened or closed, during the process of the pincers grabbing the continuously descending electric stone, the hook lifts the flap until the height of the flap is exceeded to make the flap turn down, the flap is lapped on the outer edge of the hanging table to form a slope, so that in the case of the hook unhooking, the lifting lug is lifted up, and the jaw can grab the electric stone.

[0010] Scheme six, which is the preferred of the basic scheme, the end of each jaw is detachably connected with a jaw head; the jaw head holds the electric stone, which can protect the end of the jaw and prolong the service life of the jaw.

[0011] Scheme seven, which is the preferred of scheme five, the traction assembly includes a counterweight rod, one end of the counterweight rod is rotationally connected with a rotating shaft, a plurality of counterweight blocks are sleeved on the counterweight rod, the other end of the counterweight rod is provided with a bolt for preventing the counterweight blocks from sliding, and the counterweight blocks are in abutment with the bolt; the weight of the counterweight blocks is transmitted to the counterweight rod, the counterweight rod drives the rotating shaft to rotate towards the hanging table, so that the hook is more firmly hooked on the hanging table, facilitating the locking of the hook, and the counterweight blocks of the present patent replace the springs in the prior art. Since the temperature of the held electric stone is very high, even after cooling, the surface temperature of the electric stone is reduced to about 300℃, the internal temperature of the electric stone is still as high as 1000℃, the jaw repeatedly contacts the electric stone at this temperature, the spring in the prior art fails in the performance of extension and contraction, which is not convenient for the locking and unhooking of the hook, and the holding is not convenient. The counterweight blocks solve the problem of performance failure of the spring.

[0012] Scheme eight, which is the preferred of the basic scheme, the top of the lifting frame is provided with protrusions on both sides; when the present pincers is laid down, the three-prism-shaped protrusions are directly contacted with the ground, so that the lifting lug is not attached to the ground, and the traveling crane can directly hook the lifting lug to lift it up.

[0013] Scheme nine, which is the preferred of the basic scheme, the end of the jaw is provided with a dovetail groove, the jaw head is clamped with the dovetail groove and fixed through a bolt; the electric stone is very hard, and long-time contact between the electric stone and the jaw head can cause the wear of the jaw head. The jaw head of the present patent can be replaced, the bolt can be unscrewed to detach the worn jaw head and replace a new one, the dovetail groove structure facilitates the disassembly and replacement of the jaw head, thereby prolonging the service life of the pincers.

[0014] Scheme ten, which is the preferred of scheme six, the jaw head is provided with a tooth groove; the tooth groove facilitates the jaw head to grab the electric stone. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 It is a perspective view of the electric stone grabbing pincers.

[0016] Fig. 2 This is a front view of a calcium carbide gripper according to the present invention;

[0017] Fig. 3 This is a left view of a calcium carbide gripper according to the present invention;

[0018] Fig. 4 This is a partial cross-sectional view of a calcium carbide gripper according to the present invention. Implementation

[0019] The present invention will be further described in detail below through specific embodiments:

[0020] The reference numerals in the accompanying drawings of the instruction manual include: 1. L-shaped main beam; 2. jaws; 3. lifting block; 4. lifting frame; 5. jaw head; 6. protrusion; 7. counterweight rod; 8. first fixing pin; 9. second fixing pin; 10. lifting lug; 11. locking hook; 12. base; 13. support leg; 14. fixing seat; 15. fixing block; 16. rotating shaft; 17. hanging platform; 18. flip plate; 19. counterweight block; 20. first elongated hole; 21. slot; 22. second elongated hole.

[0021] like Figs. 1 to 4 As shown: A gripper for calcium carbide includes a lifting frame 4, a lifting block 3, a locking hook 11, two L-shaped main beams 1, and a locking mechanism. The top of the lifting frame 4 is welded with a lifting lug 10, and the top two sides of the lifting frame 4 are respectively provided with protrusions 6. The side section of the lifting frame 4 is U-shaped. The lifting block 3 is located in the cavity of the U-shaped lifting frame 4 and is slidably connected to the lifting frame 4. The lifting frame 4 has two first elongated holes 20. The lifting block 3 is fixedly penetrated by a first fixing pin 8. The two ends of the first fixing pin 8 pass through the two first elongated holes 20 of the lifting frame 4, and the first fixing pin 8 is slidably connected to the first elongated holes 20. The locking hook 11 is locked to the lifting frame 4 by the locking mechanism. The locking mechanism includes a hanging platform 17 and a traction component. The hanging platform 17 is fixedly connected to the lifting frame 4. The hanging platform 17 is hinged with a flap 18. The flap 18 can be rotated downwards to overlap the outer edge of the hanging platform 17.

[0022] The lifting block 3 has an internal cavity and is located between two L-shaped main beams 1. Claws 2 are movably connected to both sides of the cavity within the lifting block 3. Bases 12 are welded to the bottom of the two L-shaped main beams 1. The two L-shaped main beams 1 are symmetrically arranged about the lifting frame 4. Each L-shaped main beam 1 has a slot 21. The middle part of each claw 2 is hinged to the L-shaped main beam 1. The end of the claw 2 near the lifting frame 4 passes through the slot 21 of the L-shaped main beam 1 and extends into the cavity of the lifting block 3. A second elongated hole 22 is formed in the portion of each claw 2 located within the cavity of the lifting block 3. Second fixing pins 9 are fixedly inserted through both sides of the lifting block 3, and each second fixing pin 9 is slidably connected to the second elongated hole 22 on each claw 2.

[0023] The lifting frame 4 is fixedly connected with a fixing assembly, the fixing assembly comprises a fixing seat 14 and a rotating shaft 16, the fixing seat 14 is fixedly connected to the base 12, two fixing blocks 15 are welded on the fixing seat 14, the locking hook 11 is arranged between the two fixing blocks 15 and is rotationally connected with a rotating shaft, the other end of the locking hook 11 is overlapped on the hanging table 17, the rotating shaft is rotationally connected with the two fixing blocks 15, and two nuts are threadedly connected to the rotating shaft, and each nut is tightly attached to the surface on the side of the locking hook 11 of the fixing block 15.

[0024] The traction assembly comprises a counterweight rod 7, the counterweight rod 7 is rotationally connected with the rotating shaft 16, the counterweight rod 7 is located below the lifting block 3 and extends to the side, opposite to the fixing seat 14, of the lifting block 3, a plurality of counterweight blocks 19 are sleeved on the side, away from the fixing seat 14, of the counterweight rod 7, and a bolt for preventing the counterweight blocks 19 from falling off is connected to the end of the counterweight rod 7, and the outermost counterweight block 19 abuts against the bolt at the end of the counterweight rod 7; two supporting legs 13 are fixedly connected to the two sides of the base 12.

[0025] The end of each claw 2 is provided with a dovetail groove, and the dovetail groove on each claw 2 is inserted with a jaw 5 and is fixed by a bolt, and the surfaces on the opposite sides of the two jaws 5 are respectively provided with tooth grooves.

[0026] The implementation manner of the embodiment is as follows: before use, the end of the locking hook 11 is overlapped on the hanging table 17, and the flap 18 is overlapped on the top of the end of the locking hook 11, at this time, the locking hook 11 is in a locked state, the first fixing pin 8 on the lifting block 3 is located at the bottom of the first long hole 20 on the lifting frame 4, and the two claws 2 are in an open state; the hook of the travelling crane is hung on the lifting lug 10, the present claw holder is moved to the upper side of the calcium carbide pot and the calcium carbide to be grabbed, the operator operates the travelling crane to lower the lifting lug 10, the supporting leg 13 falls to the upper surface of the calcium carbide, and in the process of continuing to be lowered, the locking hook 11 gradually lifts the flap 18 upward, the lifting lug 10 and the lifting frame 4 continue to be lowered so that the locking hook 11 is higher than the flap 18, the flap 18 is rotated downward due to gravity and is overlapped at the outer edge of the hanging table 17. The jaws 5 at the two ends of the two claws 2 are attached to the two sides of the calcium carbide pot, the upper surfaces of the jaws 5 are located below the lug lug of the calcium carbide pot, the travelling crane lifts the lifting lug 10 upward, the lifting frame 4 drives the whole device to move upward, the upper surfaces of the jaws 5 lift the lug lug and are tightly attached to the two sides of the calcium carbide, at this time, the tooth grooves on the jaws 5 are tightly attached to the calcium carbide (the structure of the calcium carbide pot is shown in the patent with the application number 202210139959.8).

[0027] During the process of lifting the lifting lug 10 and the lifting frame 4, the locking hook 11 slips off the inclined flap 18 and cannot be lapped on the hanging table 17, at this time, the locking hook 11 is in the unhooked state, the lifting frame 4 moves upward, the first fixed pin 8 in the first long hole 20 on the lifting frame 4 moves upward with the lifting frame 4, the first fixed pin 8 drives the lifting block 3 to lift, each second fixed pin 9 gradually slides in the second long hole 22 on the claw 2 and approaches the middle of the lifting block 3, the two claws 2 respectively tighten the calcium carbide, the claw head 5 clamps the calcium carbide and takes the calcium carbide out of the calcium carbide pot.

[0028] When the crane hoists the calcium carbide to the space above the cooling site, the operator gradually lowers the present tongs, the lifting lug 10 and the lifting frame 4 are lowered and drive the lifting block 3 to descend together, if the calcium carbide is thin or there is calcium carbide around the placement position, the claw 2 and the claw head 5 are hindered by the ground or the surrounding obstacles, at this time, the lifting block 3 and the lifting frame 4 can move downward first, the top of the locking hook 11 lifts the flap 18 upward, the locking hook 11 is tightly buckled on the hanging table 17 under the traction of the counterweight 19, at this time, the locking hook 11 is in the locked state, when the lifting lug 10 and the lifting frame 4 are lifted upward, the hanging table 17 drives the locking hook 11 and the fixed seat 14 to lift upward, the lifting force received by the two L-shaped main beams 1 is transmitted to the two claws 2, so that the claw head 5 is in a relaxed state and releases the calcium carbide, at this time, the lifting block 3 descends under the action of gravity, the first fixed pin 8 descends together with the lifting block 3, the first fixed pin 8 slides downward in the first long hole 20 on the lifting frame 4, the two second fixed pins 9 slide in the second long hole 22 on the claw 2 and slide to the side away from the lifting block 3, so that the two claws 2 gradually open, then the next hoisting operation of the calcium carbide can be continued.

[0029] The above is only an embodiment of the present application, and the well-known specific structures and characteristics in the scheme are not described in detail. It should be pointed out that for those skilled in the art, without departing from the structure of the present application, a number of modifications and improvements can be made, which should be regarded as the protection scope of the present application, which will not affect the effect and practicality of the present application. The protection scope claimed in the present application should be subject to the content of its claims, and the specific implementation mode and the like recorded in the specification can be used to explain the content of the claims.

Claims

1. A grabber for calcium carbide, characterized in that, The device includes a lifting frame (4), a lifting block (3), a locking hook (11), two L-shaped main beams (1), and a locking mechanism. The lifting frame (4) has a U-shaped cross-section and a lifting lug (10) fixed to its top. The locking hook (11) is locked to the lifting frame (4) by the locking mechanism. The lifting frame (4) has two first elongated holes (20). The lifting block (3) is slidably connected to the lifting frame (4). A first fixing pin (8) passes through the lifting block (3). The two ends of the first fixing pin (8) pass through the first elongated holes (20) and are slidably connected to the first elongated holes (20). The bottom of the two L-shaped main beams (1) is fixedly connected to a base (12). A fixing component for fixing the locking hook (11) is connected to the base (12). The lifting block (3) has a cavity inside. Each L-shaped main beam (1) has a slot (21). Each L-shaped main beam (1) is hinged with a claw (2). Each claw (2) One end near the lifting frame (4) extends through the slot (21) into the cavity of the lifting block (3), and each of the jaws (2) is movably connected to the lifting block (3); the fixing assembly includes a fixing seat (14) and a rotating shaft (16), the fixing seat (14) is fixed to the base (12), the fixing seat (14) is connected to two fixing blocks (15), the locking hook (11) is placed between the two fixing blocks (15), and the rotating shaft (16) is connected to the two A fixed block (15) and a locking hook (11) are rotatably connected. Nuts are threadedly connected to both sides of the rotating shaft (16), and the nuts abut against the fixed block (15). The locking mechanism includes a hanging platform (17) and a traction component for stably attaching the locking hook (11) to the hanging platform (17). The hanging platform (17) is fixedly connected to the lifting frame (4). A flap (18) is hinged to the hanging platform (17). The end of the locking hook (11) is attached to the hanging platform (17).

2. The grabbing tongs for calcium carbide according to claim 1, characterized in that, Each of the jaws (2) is provided with a second elongated hole (22), and the two ends of the lifting block (3) are respectively provided with second fixing pins (9). Each of the second fixing pins (9) passes through the second elongated hole (22) and is slidably connected to the second elongated hole (22).

3. The grabbing tongs for calcium carbide according to claim 1, characterized in that, The base (12) is fixed with legs (13) on both sides.

4. The grabbing tongs for calcium carbide according to claim 1, characterized in that, Each of the jaws (2) has a detachable jaw (5) attached to its end.

5. The grabbing tongs for calcium carbide according to claim 1, characterized in that, The traction assembly includes a counterweight rod (7), one end of which is rotatably connected to a rotating shaft (16). Several counterweight blocks (19) are sleeved on the counterweight rod (7), and the other end of the counterweight rod (7) is provided with bolts to prevent the counterweight blocks (19) from slipping off. The counterweight blocks (19) abut against the bolts.

6. The grabbing tongs for calcium carbide according to claim 1, characterized in that, The top two sides of the lifting frame (4) are respectively provided with protrusions (6).

7. The grabbing tongs for calcium carbide according to claim 4, characterized in that, The end of the pliers (2) is provided with a dovetail groove, and the pliers head (5) is engaged with the dovetail groove and fixed by bolts.

8. The grabbing tongs for calcium carbide according to claim 4, characterized in that, The pliers head (5) is provided with tooth grooves.

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