A large ring forging hoisting tool

Abstract

The utility model relates to large -scale high -end forge forging processing technical field, concretely relates to a large -scale annular forge hoisting tool. The utility model provides a large -scale annular forge hoisting tool, including hoist outer claw, hoist inner claw, locking mechanism, first connecting rod, second connecting rod and hoist lock ring, the first end of first connecting rod, the first end of second connecting rod and hoist lock ring are hinged through the fifth pivot, so that first connecting rod and second connecting rod can rotate around the fifth pivot, the hoist outer claw includes the lock groove board, vertical rod and bottom support plate that are connected, the vertical rod is perpendicular to the bottom support plate, and the hoist inner claw includes the clamping arm and the hinged portion that are connected. Large -scale annular forge hoisting tool has the function of lifting self -locking, satisfies the need of ring piece hoisting clamping, and the locking ability is strong, and the stability is good, and the phenomenon of skidding is not easy to occur.

Description

Technical Field

[0001] This utility model relates to the field of forging and processing technology for large high-end forgings, and specifically to a lifting tool for large ring forgings. Background Technology

[0002] In the production of large, high-end ring components, the hoisting of hot-rolled ring components (typically at temperatures above 800℃) is a crucial step. Currently, the following two types of hoisting equipment are commonly used for hot-rolled ring components:

[0003] The first type is the ordinary hook lifting device. Ordinary chain lifting devices require hooks to be attached to multiple points on the outer ring of the component. This requires multiple operators to complete the hooking in a high-temperature environment before lifting and transporting the component. However, the hooks are prone to slipping, resulting in low safety. The second type is the clamping device. Using the clamping device requires manual locking before lifting the hot-rolled ring component, which is cumbersome.

[0004] Currently, there is a lack of a lifting device that can stably clamp hot-rolled ring parts, has a self-locking function, and does not require manual locking. Utility Model Content

[0005] (I) The problem to be solved by this utility model is that there is currently a lack of a lifting device that can stably clamp hot-rolled ring parts and has a self-locking function, without the need for manual locking.

[0006] (II) Technical Solution

[0007] A lifting tool for large ring forgings includes an outer jaw of the lifting tool, an inner jaw of the lifting tool, a locking mechanism, a first connecting rod, a second connecting rod, and a lifting tool locking ring;

[0008] The first end of the first connecting rod, the first end of the second connecting rod, and the lifting device locking ring are hinged together by a fifth pin, so that the first connecting rod and the second connecting rod can rotate around the fifth pin.

[0009] The outer jaws of the lifting device include a locking groove plate, a vertical rod, and a bottom support plate connected together. The vertical rod is perpendicular to the bottom support plate. The inner jaws of the lifting device include a clamping arm and a hinged part connected together. The middle part of the locking groove plate and the middle part of the hinged part are hinged together by a first pin. The second end of the first connecting rod is hinged to the end of the locking groove plate away from the vertical rod by a fourth pin. The second end of the second connecting rod is hinged to the top end of the hinged part by a third pin. The lines connecting the first pin, the third pin, the fourth pin, and the fifth pin form a parallelogram.

[0010] The locking mechanism includes a locking hook and a locking groove. The locking hook is installed on the inner claw of the lifting device, and the locking groove is formed on the outer claw of the lifting device.

[0011] When the large ring forging hoisting tool is in the hoisting state, the vertical rod and the clamping arm are parallel, and the vertical rod and the clamping arm are respectively in close contact with the outer circumferential surface and the inner wall of the hot-rolled ring, and the bottom support plate supports the hot-rolled ring; when the large ring forging hoisting tool is in the unlocked state, the locking hook on the inner claw of the hoisting tool hooks the locking groove of the outer claw of the hoisting tool, so that the opening between the inner claw and the outer claw of the hoisting tool is widened.

[0012] According to one embodiment of the present invention, the locking groove plate, the vertical rod, and the bottom support plate are connected in sequence from high to low, the locking groove plate and the bottom support plate are located on the same side of the vertical rod, and the clamping arm is lower than the hinge portion.

[0013] According to one embodiment of the present invention, the locking mechanism includes a first locking hook and a first locking groove. The first locking hook includes an inner claw buckle. The first locking groove is located at the top of the locking groove plate at the end away from the vertical rod. The inner claw buckle is hinged to the clamping arm via a second pin. When the large ring forging hoisting tool is in the unlocked state, the inner claw buckle on the clamping arm hooks onto the first locking groove on the locking groove plate.

[0014] According to one embodiment of the present invention, the locking mechanism includes a second locking hook and a second locking groove. The second locking hook includes an outer claw buckle. The second locking groove is located on the top of the locking groove plate away from the first locking groove. The outer claw buckle, the top of the hinge portion, and the second connecting rod are hinged together by a third pin. When the large ring forging hoisting tool is in the unlocked state, the inner claw buckle on the clamping arm hooks onto the first locking groove on the locking groove plate, and the outer claw buckle hooks onto the second locking groove on the locking groove plate.

[0015] According to one embodiment of the present invention, the hinge portion includes two parallel inner claw plates, the bottom ends of the inner claw plates are respectively connected to the top two sides of the clamping arm, a first mounting cavity is formed between the two inner claw plates, a second mounting cavity communicating with the first mounting cavity is formed in the clamping arm, and the inner claw buckle is hingedly mounted in the second mounting cavity through a second pin.

[0016] According to one embodiment of the present invention, the clamping arm includes a connecting plate and two parallel vertical plates. The connecting plate is fixed between the bottom ends of the two vertical plates, and the same end of the two inner claw plates is fixed to the top ends of the two vertical plates respectively. The space formed between the two vertical plates and the connecting plate is the second mounting cavity.

[0017] According to one embodiment of the present invention, the outer claw buckle includes two claw arms and a locking shaft. The first ends of the two claw arms and the top ends of the two inner claw plates are hinged together by a third pin. The locking shaft is installed between the second ends of the two claw arms.

[0018] According to one embodiment of the present invention, the inner claw plate includes a triangular plate and a horizontal plate connected together. The triangular plate is a right-angled triangular plate, the horizontal plate is perpendicular to the right-angled side of the triangular plate, and the vertical plate is connected to the end of the horizontal plate away from the triangular plate, and the vertical plate is perpendicular to the horizontal plate.

[0019] According to one embodiment of the present invention, the distance between the bottom surface of the locking groove plate and the top surface of the bottom support plate is greater than the length of the hot-rolled ring along its axial direction.

[0020] When the lifting tool for large ring forgings is in the locked state, the distance between the vertical plate and the vertical rod is the same as the thickness of the hot-rolled ring, and the distance between the bottom surface of the vertical plate and the top surface of the bottom support plate is less than the length of the hot-rolled ring along its axial direction.

[0021] According to one embodiment of the present invention, the lifting tool for the large ring forging is a high-temperature resistant alloy lifting tool.

[0022] The beneficial effects of this utility model are:

[0023] This large ring forging hoisting tool has the following advantages:

[0024] First, the "scissor fork" structure of the lifting device has a self-locking function, which meets the clamping requirements for lifting ring parts. It has strong locking ability, good stability, and is not prone to slippage.

[0025] Secondly, it has a self-locking function, eliminating the need for manual locking and making operation convenient and quick.

[0026] Third, it does not require large auxiliary tools, the lifting device has a simple structure and is easy to operate, minimizing the risk of operation in high-temperature environments. Attached Figure Description

[0027] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0028] Figure 1 A schematic diagram of a large ring forging hoisting tool provided in this embodiment of the utility model for hoisting a hot-rolled ring;

[0029] Figure 2 A structural diagram of the large ring forging hoisting tool provided in this embodiment of the utility model in the unlocked state;

[0030] Figure 3 This is a structural diagram of a large ring forging hoisting tool provided in an embodiment of the present invention for hoisting hot-rolled ring parts;

[0031] Figure 4 A structural diagram of the large ring forging hoisting tool provided in this embodiment of the utility model in the hoisting state;

[0032] Figure 5 Exploded view of the large ring forging hoisting tool provided in the embodiment of this utility model;

[0033] Figure 6 A schematic diagram showing the connection of the inner and outer claws of the lifting device provided in this embodiment of the utility model.

[0034] Icons: 1. Spreader outer jaw; 101. Locking groove plate; 102. First locking groove; 103. Second locking groove; 104. Vertical rod; 105. Bottom support plate; 106. Handle; 2. Spreader inner jaw; 201. First inner jaw plate; 202. Second inner jaw plate; 203. Connecting plate; 204. Side plate; 205. Triangular plate; 206. Horizontal plate; 207. Vertical plate; 3. Outer jaw buckle; 301. Clamping arm; 302. Clamping shaft; 4. Inner jaw buckle; 5. First connecting rod; 6. Second connecting rod; 7. Spreader locking ring; 8. First pin; 9. Second pin; 10. Third pin; 11. Fourth pin; 12. Fifth pin; 13. Hot-rolled ring. Detailed Implementation

[0035] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0036] like Figures 1-6 As shown, one embodiment of this utility model provides a lifting tool for large ring forgings, including an outer claw 1, an inner claw 2, a locking mechanism, a first connecting rod 5, a second connecting rod 6, and a lifting locking ring 7;

[0037] The first end of the first link 5, the first end of the second link 6, and the lifting lock ring 7 are hinged together by the fifth pin 12 so that the first link 5 and the second link 6 can rotate around the fifth pin 12.

[0038] The outer claw 1 of the lifting device includes a locking groove plate 101, a vertical rod 104 and a bottom support plate 105 connected together. The vertical rod 104 is perpendicular to the bottom support plate 105. The inner claw 2 of the lifting device includes a clamping arm and a hinged part connected together. The middle part of the locking groove plate 101 and the middle part of the hinged part are hinged together by a first pin 8. The second end of the first connecting rod 5 is hinged to the end of the locking groove plate 101 away from the vertical rod 104 by a fourth pin 11. The second end of the second connecting rod 6 is hinged to the top end of the hinged part by a third pin 10. The line connecting the first pin 8, the third pin 10, the fourth pin 11 and the fifth pin 12 forms a parallelogram.

[0039] The locking mechanism includes a locking hook and a locking groove. The locking hook is installed on the inner claw 2 of the lifting device, and the locking groove is opened on the outer claw 1 of the lifting device.

[0040] When the lifting tool for large ring forgings is in the lifting state, the vertical rod 104 and the clamping arm are parallel, and the vertical rod 104 and the clamping arm are respectively close to the outer circumferential surface and the inner wall of the hot-rolled ring 13, and the bottom support plate 105 supports the hot-rolled ring 13; when the lifting tool for large ring forgings is in the unlocked state, the locking hook on the inner claw 2 of the lifting tool hooks the locking groove of the outer claw 1 of the lifting tool, so that the opening between the inner claw 2 and the outer claw 1 of the lifting tool is widened.

[0041] It should be noted that before lifting this large ring forging lifting tool, the locking hook in the locking mechanism hooks into the locking groove of the outer claw 1 of the lifting tool, so that the distance between the inner claw 2 and the outer claw 1 of the lifting tool is at its maximum value, that is, the opening formed between the inner claw 2 and the outer claw 1 of the lifting tool is at its maximum.

[0042] When using this large ring forging lifting tool to lift the hot-rolled ring 13, the general steps are as follows:

[0043] The first step is to select appropriate lifting tools for different hot-rolled ring parts 13. It should be noted that at least 3-4 of these lifting tools are required for large hot-rolled ring parts.

[0044] The second step is to use slings or chains to connect the lifting lock ring 7 to the crane hook.

[0045] Thirdly, the crane moves multiple lifting tools to directly above the hot-rolled ring 13. Then, the operator uses a hand hook to smoothly place the lifting tools above the hot-rolled ring 13, thus placing the hot-rolled ring 13 into the semi-enclosed space formed by the outer claw 1 and inner claw 2 of the lifting tool. At this point, the inner claw 2 is close to the inner wall of the hot-rolled ring 13, the vertical rod 104 of the outer claw 1 is close to the outer wall of the hot-rolled ring 13, and the bottom support plate 105 of the outer claw 1 is against the bottom surface of the hot-rolled ring 13. Next, the locking mechanism is opened. Under the weight of the lifting tools themselves, the outer claw 1 and inner claw 2 rotate around the first pin 8, bringing them closer together and clamping the hot-rolled ring 13 tightly. That is, at this moment, the vertical rod 104 of the outer claw 1 and the clamping arm of the inner claw 2 are respectively in close contact with the outer circumference and inner wall of the hot-rolled ring 13.

[0046] The fourth step is for the crane to lift the object. At this time, due to the "scissor fork" structure of the lifting tool, the outer claw 1 and the inner claw 2 of the lifting tool cooperate to automatically lock the hot-rolled ring 13.

[0047] Fifth step: When the hot-rolled ring 13 is hoisted and the lifting device needs to be released, the operator uses a hand hook to hook the locking hook on the inner claw 2 of the lifting device into the locking groove of the outer claw 1 of the lifting device. The opening between the outer claw 1 and the inner claw 2 of the lifting device increases, thereby releasing the hot-rolled ring 13 and completing one hoisting operation.

[0048] It is evident that using the lifting tool of this embodiment has at least the following advantages:

[0049] First, when lifting the hot-rolled ring 13, the lifting tool's "scissor fork" structure allows the outer claw 1 and inner claw 2 to come close together and clamp the hot-rolled ring 13, while the bottom support plate 105 supports the bottom of the hot-rolled ring 13. This provides stable support and clamping of the hot-rolled ring 13, with strong locking ability, good stability, and minimal slippage.

[0050] Secondly, this lifting tool has a self-locking function, eliminating the need for manual locking and making it convenient and quick to operate.

[0051] It should be noted that in this embodiment, the lines connecting the first pin 8, the third pin 10, the fourth pin 11, and the fifth pin 12 form a parallelogram, meaning that the first connecting rod 5, the second connecting rod 6, the outer claw 1 of the lifting device, and the inner claw 2 of the lifting device form a "scissor fork" mechanism. Thus, when lifting this lifting tool, the top ends of the first connecting rod 5 and the second connecting rod 6 rotate around the fifth pin 12, and the second ends of the first connecting rod 5 and the second connecting rod 6 approach each other. This proximity causes the outer claw 1 and the inner claw 2 of the lifting device to approach each other, narrowing the opening between them and firmly clamping the hot-rolled ring 13.

[0052] In this embodiment, as Figure 5 As shown, the outer claw 1 of the lifting device includes a locking groove plate 101, a vertical rod 104, and a bottom support plate 105 connected in sequence. The locking groove plate 101, the vertical rod 104, and the bottom support plate 105 are connected in descending order. The locking groove plate 101 and the bottom support plate 105 are located to the left of the vertical rod 104, and the bottom support plate 105 is perpendicular to the vertical rod 104. The side of the vertical rod 104 facing the locking groove plate 101 is used to contact the outer peripheral surface of the hot-rolled ring 13, and the bottom support plate 105 is used to support the hot-rolled ring 13.

[0053] In this embodiment, the inner jaw 2 of the lifting device is generally Z-shaped. The inner jaw 2 includes a hinged part and a clamping arm connected to each other, wherein, for example... Figure 5 As shown, the hinge portion includes two parallel inner jaw plates, which are named the first inner jaw plate 201 and the second inner jaw plate 202 for easy distinction. The clamping arm includes a connecting plate 203 and two parallel vertical plates 207. The connecting plate 203 is fixed between the bottom ends of the two vertical plates 207, and the vertical plates 207 and the connecting plate 203 are perpendicular to each other. The bottom sides of the first inner jaw plate 201 and the second inner jaw plate 202 are respectively connected to the tops of the two vertical plates 207. A first mounting cavity is formed between the first inner jaw plate 201 and the second inner jaw plate 202, and a second mounting cavity is formed between the two vertical plates 207 and the connecting plate 203. The first mounting cavity and the second mounting cavity are connected.

[0054] In some embodiments, the first inner claw plate 201, the second inner claw plate 202, the two vertical plates 207 and the connecting plate 203 are integrally formed by machining.

[0055] It should be noted that the purpose of setting two inner claw plates and two vertical plates 207 is to strengthen the structural strength of the inner claw 2 of the lifting device and to facilitate the installation of the inner claw buckle 4, the outer claw buckle 3 and the first connecting rod 5.

[0056] In this embodiment, as Figure 6 As shown, both the first inner claw plate 201 and the second inner claw plate 202 include a triangular plate 205 and a horizontal plate 206. The triangular plate 205 is a right-angled triangular plate. One end of the horizontal plate 206 is fixed to the bottom side of the triangular plate 205, and the horizontal plate 206 is perpendicular to one right-angled side of the triangular plate 205. The top corner of the triangular plate 205 has a rounded corner. The top of the vertical plate 207 is connected to the end of the horizontal plate 206 away from the triangular plate 205, and the vertical plate 207 is perpendicular to the horizontal plate 206. The vertical plate 207, the horizontal plate 206, and the triangular plate 205 form a Z-shaped structure.

[0057] In this embodiment, as Figure 5As shown, a first pin hole is provided in the middle of the locking groove plate 101, and a second pin hole is provided at the end of the locking groove plate 101 away from the vertical rod 104. A first round hole is provided at the top of each of the two vertical plates 207, a second round hole is provided near the right angle of each triangular plate 205, and a third round hole is provided at the top corner of each triangular plate 205.

[0058] Furthermore, when connecting the outer jaw 1 and the inner jaw 2 of the spreader, the locking groove plate 101 is first inserted between the first inner jaw plate 201 and the second inner jaw plate 202 of the inner jaw 2 of the spreader, so that the first pin hole at the middle position of the locking groove plate 101, the second round hole on the triangular plate 205 of the first inner jaw plate 201, and the second round hole on the triangular plate 205 of the second inner jaw plate 202 are aligned. Finally, the first pin 8 is used to connect the two triangular plates 205 and the locking groove plate 101.

[0059] In this embodiment, as Figure 2 , Figure 3 and Figure 4 As shown, the lifting device locking ring 7 is generally Ω-shaped, and the first connecting rod 5, the second connecting rod 6 and the two ends of the lifting device locking ring 7 are hinged together by the fifth pin 12.

[0060] In a preferred embodiment, there are two first connecting rods 5 and one second connecting rod 6. The first ends of the two first connecting rods 5, the first end of the second connecting rod 6, and the two ends of the lifting lock ring 7 are hinged together by a fifth pin 12. The purpose of providing two first connecting rods 5 is to increase the strength of the entire lifting tool.

[0061] In this embodiment, mounting holes are provided at the second ends of the two first connecting rods 5 and the second ends of the second connecting rods 6. When the first connecting rods 5 are connected to the locking plate 101, the locking plate 101 extends between the two first connecting rods 5, and the second pin hole on the locking plate 101 is aligned with the mounting holes on the two first connecting rods 5. Finally, the two second connecting rods 6 are hinged together with the locking plate 101 using the fourth pin 11.

[0062] In some embodiments, the locking mechanism includes a first locking hook and a first locking groove 102. The first locking hook includes an inner claw latch 4, and the first locking groove 102 is located at the top end of the locking groove plate 101 away from the vertical rod 104.

[0063] The inner jaw latch 4 is hinged to the clamping arm via the second pin 9. Specifically, as shown... Figure 4 As shown, the inner claw buckle 4 has a pin hole in the middle. When installing the inner claw buckle 4, the inner claw buckle 4 is placed between the two vertical plates 207 of the clamping arm, and the pin hole of the inner claw buckle 4 is aligned with the first round hole at the top of the two vertical plates 207. Then, the inner claw buckle 4 and the two vertical plates 207 are connected by the second pin 9.

[0064] like Figure 4 and Figure 5 As shown, the top of the inner claw buckle 4 has a hook structure, and the top of the locking plate 101 near the inner claw buckle 4 has a first locking groove 102. When the hook structure of the inner claw buckle 4 hooks the first locking groove 102 of the locking plate 101, the opening between the outer claw 1 and the inner claw 2 of the lifting device increases, and the outer claw 1 and the inner claw 2 of the lifting device remain stable and stationary.

[0065] When using this type of large ring forging lifting tool, before placing the lifting tool on the hot-rolled ring 13, the hook structure of the inner claw buckle 4 hooks into the first locking groove 102 of the locking groove plate 101. At this time, since the opening of the semi-enclosed space between the outer claw 1 and the inner claw 2 of the lifting tool is at its maximum, the hot-rolled ring 13 can smoothly enter the semi-enclosed space formed by the outer claw 1 and the inner claw 2 of the lifting tool.

[0066] After the hot-rolled ring 13 enters the semi-enclosed space formed by the outer jaw 1 and the inner jaw 2 of the lifting tool, the clamping arm of the inner jaw 2 is close to the inner wall of the hot-rolled ring 13, the vertical rod 104 of the outer jaw 1 is close to the outer wall of the hot-rolled ring 13, and the bottom support plate 105 of the outer jaw 1 is attached to the bottom surface of the hot-rolled ring 13. Then, a tool is used to pry open the inner jaw buckle 4 to engage the locking relationship between the inner jaw buckle 4 and the first locking groove 102. Under the action of the lifting tool's own weight, the outer jaw 1 and the inner jaw 2 of the lifting tool rotate around the first pin 8, and the outer jaw 1 and the inner jaw 2 of the lifting tool move closer to each other, thereby clamping the hot-rolled ring 13 and holding it tightly. At this time, the vertical rod 104 of the outer jaw 1 and the clamping arm of the inner jaw 2 are respectively in close contact with the outer circumferential surface and the inner wall of the hot-rolled ring 13. When the crane lifts the object, under the pulling force provided by the crane, the weight of the lifting tool itself, and the weight of the hot-rolled ring 13, the second ends of the first connecting rod 5 and the second connecting rod 6 move closer to each other, thereby causing the outer claw 1 and the inner claw 2 of the lifting device to move closer to each other. The opening between the outer claw 1 and the inner claw 2 of the lifting device narrows, thereby firmly clamping the hot-rolled ring 13.

[0067] When the hot-rolled ring 13 is hoisted and the lifting device needs to be released, the operator uses a hand hook to hook the inner claw buckle 4 on the inner claw 2 of the lifting device into the first locking groove 102 of the outer claw 1 of the lifting device. The opening between the outer claw 1 and the inner claw 2 of the lifting device is widened, thereby releasing the hot-rolled ring 13.

[0068] In some other embodiments, the locking mechanism includes a first locking hook, a second locking hook, a first locking groove 102, and a second locking groove 103. The first locking hook includes an inner claw latch 4, and the first locking groove 102 is located at the top of the locking groove plate 101 away from the vertical rod 104. The inner claw latch 4 is hinged to the clamping arm via a second pin 9. Figure 5As shown, the second locking groove 103 is located on the top side of the locking groove plate 101 away from the first locking groove 102. The second locking groove 103 is located on the top side of the locking groove plate 101 near the vertical rod 104. The second locking hook includes an external claw latch 3, such as... Figure 4 As shown, the outer claw buckle 3, the two triangular plates 205, and the second end of the second connecting rod 6 are hinged together by the third pin 10.

[0069] Specifically, such as Figure 4 and Figure 6 As shown, the external claw buckle 3 includes two clamping arms 301 and a clamping shaft 302. The first ends of the two clamping arms 301, the second end of the second connecting rod 6, and the top ends of the two triangular plates 205 are hinged together by a third pin 10. The clamping shaft 302 is installed between the second ends of the two clamping arms 301.

[0070] That is, when connecting the second link 6, the outer claw buckle 3 and the inner claw 2 of the lifting device, first insert the second end of the second link 6 between the two triangular plates 205, then attach the two clamping arms 301 of the outer claw buckle 3 to the outer side of the two triangular plates 205 respectively, and make the mounting hole at the second end of the second link 6, the third round hole at the top corner of the two triangular plates 205 and the two mounting holes at the first end of the two clamping arms 301 aligned, and finally install the third pin 10.

[0071] By setting the inner jaw buckle 4 and the outer jaw buckle 3 to work together, the stability of this lifting tool in the unlocked state is improved. That is, when the outer jaw buckle 3 hooks into the second locking groove 103 on the outer jaw 1 of the lifting tool, and the inner jaw buckle 4 hooks into the first locking groove 102 on the outer jaw 1 of the lifting tool, the opening of the semi-enclosed cavity formed between the outer jaw 1 and the inner jaw 2 of the lifting tool reaches its maximum, and the stability between the outer jaw 1 and the inner jaw 2 of the lifting tool is stronger.

[0072] Before lifting, the hook structure of the inner jaw buckle 4 of this large ring forging lifting tool is engaged with the first locking groove 102 of the locking groove plate 101, and the locking shaft 302 on the outer jaw buckle 3 is engaged with the second locking groove 103 on the locking groove plate 101. At this time, the opening degree of the semi-enclosed space between the outer jaw 1 and the inner jaw 2 of the lifting tool reaches its maximum.

[0073] After the large ring forging hoisting tool is hoisted onto the crane, the operator opens the outer jaw buckle 3 and engages the outer jaw buckle 3 with the second locking groove 103.

[0074] The crane moves multiple lifting tools to directly above the hot-rolled ring 13. Then, the operator uses a hand hook to smoothly place the lifting tools above the hot-rolled ring 13, so that the hot-rolled ring 13 enters the semi-enclosed space formed by the outer jaw 1 and the inner jaw 2 of the lifting tool. At this time, the clamping arm of the inner jaw 2 is close to the inner wall of the hot-rolled ring 13, the vertical rod 104 of the outer jaw 1 is close to the outer wall of the hot-rolled ring 13, and the bottom support plate 105 of the outer jaw 1 is attached to the bottom surface of the hot-rolled ring 13. Next, the inner jaw latch 4 is opened to release the locking state between the inner jaw latch 4 and the locking groove plate 101. Under the weight of the lifting tools themselves, the outer jaw 1 and the inner jaw 2 rotate around the first pin 8, bringing them closer together, thereby clamping and holding the hot-rolled ring 13 tightly.

[0075] When the crane lifts the object, under the pulling force provided by the crane, the weight of the lifting tool itself, and the weight of the hot-rolled ring 13, the second ends of the first connecting rod 5 and the second connecting rod 6 move closer to each other, thereby causing the outer claw 1 and the inner claw 2 of the lifting device to move closer to each other. The opening between the outer claw 1 and the inner claw 2 of the lifting device narrows, thereby firmly clamping the hot-rolled ring 13.

[0076] When the hot-rolled ring 13 is hoisted and the lifting device needs to be released, the operator uses a hand hook to hook the inner claw buckle 4 on the inner claw 2 of the lifting device into the first locking groove 102 of the outer claw 1 of the lifting device. The opening between the outer claw 1 and the inner claw 2 of the lifting device is widened, thereby releasing the hot-rolled ring 13.

[0077] It should be noted that lifting hot-rolled ring parts 13 of different sizes requires the selection of appropriate large-scale ring forging lifting tools. For example... Figure 3 As shown, when the lifting tool for the large ring forging is in the locked state, the distance between the bottom surface of the locking groove plate 101 and the top surface of the bottom support plate 105 is greater than the length of the hot-rolled ring 13 along its axial direction. The distance between the vertical plate 207 and the vertical rod 104 is the same as the thickness of the hot-rolled ring 13, and the distance between the bottom surface of the vertical plate 207 and the top surface of the bottom support plate 105 is less than the length of the hot-rolled ring 13 along its axial direction. In this way, the vertical plate 207 and the vertical rod 104 are respectively in close contact with the inner wall and outer circumferential surface of the hot-rolled ring 13.

[0078] It should be noted that the temperature of the high-temperature forgings being lifted is usually above 800℃. Using traditional lifting equipment to lift high-temperature forgings presents the following problems:

[0079] Ordinary lifting tools (such as wire ropes and chains) are prone to annealing and embrittlement at high temperatures, which leads to a decrease in strength and may cause them to break, resulting in the falling of the rings and causing serious accidents.

[0080] The large ring forging hoisting tool in this embodiment is made of high-temperature resistant alloy material.

[0081] In some embodiments, the large ring forging lifting tool is made of Inconel 718 alloy, that is, the outer jaw 1, inner jaw 2, first connecting rod 5, second connecting rod 6, lifting lock ring 7, inner jaw buckle 4, outer jaw buckle 3, and each pin are all made of alloy. Inconel 718 alloy is a precipitation-hardening nickel-chromium-iron alloy containing niobium and molybdenum, with a maximum temperature resistance of 700-1000℃, high high-temperature strength retention (tensile strength ≥650MPa at 800℃), excellent resistance to thermal fatigue (coefficient of thermal expansion 13.5μm / m·K), and resistance to oxidation corrosion (Cr element forms a dense Cr2O3 protective layer). In this embodiment, the large ring forging lifting tool is made of high-temperature resistant material to ensure safe and reliable use in high-temperature environments.

[0082] In some embodiments, the large ring-shaped forging lifting tool is made of Haynes 230 Hastelloy, a high-performance nickel-based superalloy. Haynes 230 Hastelloy has a maximum withstand temperature of 1150°C, maintains high strength at 980°C, has excellent corrosion resistance, and its ultra-high tungsten content (14%) enhances its resistance to high-temperature creep. It also has low thermal conductivity (11.4 W / m·K), which reduces heat conduction to the lifting tool body.

[0083] In some embodiments, the lifting tool for the large ring forging is made of A286 (Fe-25Ni-15Cr) alloy or 253MA (S30815) alloy.

[0084] In some embodiments, the core components of the lifting tool for large ring forgings, such as the outer claw 1 and the inner claw 2, which directly contact the high-temperature ring, are made of Inconel 718 alloy, while the components that do not directly contact the hot-rolled ring 13, such as the inner claw buckle 4, the outer claw buckle 3, the first connecting rod 5, the second connecting rod 6, and the lifting tool locking ring 7, are made of A286 (Fe-25Ni-15Cr) alloy.

[0085] In some embodiments, a handle 106 is provided on the side of the vertical rod 104 of the outer claw 1 of the lifting device that is away from the bottom support plate 105.

[0086] In some embodiments, a side plate 204 is provided on the front side of the first inner claw plate 201 and the back side of the second inner claw plate 202.

[0087] It should be noted that this large ring forging hoisting tool can be used not only to hoist hot-rolled ring 13, but also to hoist other high-temperature forgings.

[0088] In summary, this large ring forging hoisting tool has the following advantages:

[0089] First, the "scissor fork" structure of the lifting device has a self-locking function, which meets the clamping requirements for lifting ring parts. It has strong locking ability, good stability, and is not prone to slippage.

[0090] Secondly, it has a self-locking function, eliminating the need for manual locking and making operation convenient and quick.

[0091] Third, it does not require large auxiliary tools, the lifting device has a simple structure and is easy to operate, minimizing the risk of operation in high-temperature environments.

[0092] Fourth, it uses high-temperature resistant materials to ensure safe and reliable use in high-temperature environments, maintaining stable locking force even at temperatures up to 1150℃.

[0093] Fourth, it can adapt to harsh environments.

[0094] In the description of this utility model, it should be noted that the terms "upper" and "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0095] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0096] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A lifting tool for large ring forgings, characterized in that, It includes the outer claw of the spreader (1), the inner claw of the spreader (2), the locking mechanism, the first link (5), the second link (6), and the spreader locking ring (7); The first end of the first connecting rod (5), the first end of the second connecting rod (6), and the lifting lock ring (7) are hinged together by a fifth pin (12) so that the first connecting rod (5) and the second connecting rod (6) can rotate around the fifth pin (12); The outer claw (1) of the lifting device includes a locking groove plate (101), a vertical rod (104) and a bottom support plate (105) connected together. The vertical rod (104) is perpendicular to the bottom support plate (105). The inner claw (2) of the lifting device includes a clamping arm and a hinge part connected together. The middle part of the locking groove plate (101) and the middle part of the hinge part are hinged together by a first pin (8). The second end of the first connecting rod (5) is hinged to the end of the locking groove plate (101) away from the vertical rod (104) by a fourth pin (11). The second end of the second connecting rod (6) is hinged to the top end of the hinge part by a third pin (10). The line connecting the first pin (8), the third pin (10), the fourth pin (11) and the fifth pin (12) forms a parallelogram. The locking mechanism includes a locking hook and a locking groove. The locking hook is installed on the inner claw (2) of the lifting device, and the locking groove is opened on the outer claw (1) of the lifting device. When the large ring forging hoisting tool is in the hoisting state, the vertical rod (104) and the clamping arm are parallel, and the vertical rod (104) and the clamping arm are respectively close to the outer circumferential surface and inner wall of the hot-rolled ring, and the bottom support plate (105) supports the hot-rolled ring; when the large ring forging hoisting tool is in the unlocked state, the locking hook on the inner claw (2) of the hoisting tool hooks the locking groove of the outer claw (1) of the hoisting tool, so that the opening between the inner claw (2) of the hoisting tool and the outer claw (1) of the hoisting tool is enlarged.

2. The lifting tool for large ring forgings according to claim 1, characterized in that, The locking plate (101), the vertical rod (104), and the bottom support plate (105) are connected in sequence from high to low. The locking plate (101) and the bottom support plate (105) are located on the same side of the vertical rod (104), and the clamping arm is lower than the hinge.

3. A large ring forging hoisting tool according to claim 2, characterized in that, The locking mechanism includes a first locking hook and a first locking groove (102). The first locking hook includes an inner claw buckle (4). The first locking groove (102) is located at the top of the locking groove plate (101) away from the vertical rod (104). The inner claw buckle (4) is hinged to the clamping arm through a second pin (9). When the large ring forging hoisting tool is in the unlocked state, the inner claw buckle (4) on the clamping arm hooks onto the first locking groove (102) on the locking groove plate (101).

4. A large ring forging hoisting tool according to claim 3, characterized in that, The locking mechanism includes a second locking hook and a second locking groove (103). The second locking hook includes an outer claw buckle (3). The second locking groove (103) is located on the top of the locking groove plate (101) away from the first locking groove (102). The outer claw buckle (3), the top of the hinge part and the second connecting rod (6) are hinged together by a third pin (10). When the large ring forging hoisting tool is in the unlocked state, the inner claw buckle (4) on the clamping arm hooks the first locking groove (102) on the locking groove plate (101), and the outer claw buckle (3) hooks the second locking groove (103) on the locking groove plate (101).

5. A large ring forging hoisting tool according to claim 4, characterized in that, The hinge portion includes two parallel inner claw plates. The bottom ends of the inner claw plates are connected to the top two sides of the clamping arm, respectively. A first mounting cavity is formed between the two inner claw plates. A second mounting cavity is formed in the clamping arm that communicates with the first mounting cavity. The inner claw buckle (4) is hinged in the second mounting cavity through a second pin (9).

6. A large ring forging hoisting tool according to claim 5, characterized in that, The clamping arm includes a connecting plate (203) and two parallel vertical plates (207). The connecting plate (203) is fixed between the bottom ends of the two vertical plates (207). The same end of the two inner claw plates is fixed to the top ends of the two vertical plates (207). The space formed between the two vertical plates (207) and the connecting plate (203) is the second mounting cavity.

7. A large ring forging hoisting tool according to claim 6, characterized in that, The outer claw buckle (3) includes two claw arms (301) and a claw shaft (302). The first ends of the two claw arms (301) and the top ends of the two inner claw plates are hinged together by a third pin (10). The claw shaft (302) is installed between the second ends of the two claw arms (301).

8. A large ring forging hoisting tool according to claim 7, characterized in that, The inner claw plate includes a triangular plate (205) and a horizontal plate (206) connected to each other. The triangular plate (205) is a right-angled triangular plate. The horizontal plate (206) is perpendicular to the right-angled side of the triangular plate (205). The vertical plate (207) is connected to the end of the horizontal plate (206) away from the triangular plate (205), and the vertical plate (207) is perpendicular to the horizontal plate (206).

9. A large ring forging hoisting tool according to claim 6, characterized in that, The distance between the bottom surface of the locking plate (101) and the top surface of the bottom support plate (105) is greater than the length of the hot-rolled ring along its axial direction. When the lifting tool for the large ring forging is in the locked state, the distance between the vertical plate (207) and the vertical rod (104) is the same as the thickness of the hot-rolled ring, and the distance between the bottom surface of the vertical plate (207) and the top surface of the bottom support plate (105) is less than the length of the hot-rolled ring along its axial direction.

10. A lifting tool for large ring forgings according to any one of claims 1-9, characterized in that, The lifting tool for the large ring forging is a high-temperature resistant alloy lifting tool.

Images