Automatic unhooking inner hole lifting appliance

Abstract

The invention relates to the technical field of lifting appliances, in particular to an automatic unhooking inner hole lifting appliance. According to the technical scheme, the device comprises a connecting box and further comprises a hanging ring installed in the connecting box in a sliding mode, a plurality of hooks are rotatably installed on the hanging ring, an inner supporting rod which is pulled by the hooks and is of a conical structure is installed in the connecting box in a sliding mode, and a plurality of outer supporting pieces are installed on the connecting box in a sliding mode. The outer supporting piece expands or contracts along with lifting of the inner supporting rod, a conical unhooking piece is installed in the connecting box, and the unhooking piece controls the hook to be separated from the inner supporting rod. Internal expansion and friction operation of the tool are used for being fixed with an inner hole of a lifted object, the effect of being combined with the heavy object is achieved, the purpose that the lifting appliance and the lifted object are lifted and transported together is achieved, after the lifting appliance and the lifted object are transported to a destination, the lifting appliance and the lifted object are unhooked automatically, conveniently and rapidly according to the mechanical principle.

Description

Technical Field

[0001] The invention relates to the technical field of slings, in particular to an automatic unhooking inner hole sling. Background Art

[0002] Refractory bricks are a kind of building material designed for high temperature environment. They have extremely high heat resistance, corrosion resistance and mechanical strength. They are widely used in high temperature equipment in metallurgy, chemical industry, electric power and other industries, such as blast furnace, hot blast furnace, rotary kiln, etc. Since refractory bricks are usually large in size and heavy in weight, and are installed at a high position in equipment such as blast furnace, hoisting and handling become an important part of construction. Especially in blast furnace refractory materials, some refractory bricks are designed with 2-4 inner holes with a hole diameter of about 50 mm. These inner holes are not only used for positioning and fixing during installation, but also as hoisting points. Professional hoists can quickly and safely grab refractory bricks, reduce the time and labor intensity of manual operation, and significantly improve construction efficiency. Summary of the invention

[0003] The purpose of the present invention is to provide an automatic unhooking inner hole lifting device in view of the problems existing in the background technology.

[0004] The technical solution of the present invention is: an automatic unhooking inner hole lifting device, comprising a connection box, and also comprising:

[0005] A lifting ring is slidably installed in the connection box, and a plurality of hooks are rotatably installed on the lifting ring. An inner support rod with a conical structure pulled by the hook is slidably installed in the connection box. A plurality of outer support plates are slidably installed on the connection box. The outer support plates expand or contract as the inner support rod is raised or lowered. A conical unhooking piece is installed in the connection box, and the unhooking piece controls the hook to detach from the inner support rod.

[0006] Optionally, the inner support rod includes a lifting rod slidably installed inside the connection box and a connecting plate fixedly installed on the top of the lifting rod, and a concave conical groove is provided in the connecting plate, and the taper of the conical groove is consistent with the taper of the unhooking member.

[0007] Optionally, a conical surface is provided on the inner side of the outer support plate, and the conical surface is in contact with and consistent with the lifting rod.

[0008] Optionally, the outer support plate includes a base plate, a fastening rod slidably mounted on the base plate, one side of the fastening rod is provided with a corrugated line for increasing friction, and a flexible sealing plate is fixedly mounted between the fastening rod and the base plate.

[0009] Optionally, an expansion release structure is installed between the base plate and the fastening rod, and the expansion release structure drives the fastening rod to move away from the base plate as the connecting plate rises.

[0010] Optionally, the expansion release structure includes a plurality of first driving cylinders fixedly mounted on a base plate, a first plug is slidably mounted in the first driving cylinder, a first driving rod is fixedly mounted on the first plug, and the first driving rod is fixedly connected to the fastening rod.

[0011] Optionally, the expansion and release structure also includes a second driving cylinder fixedly installed inside the connecting box, a second plug is slidably installed in the second driving cylinder, a second driving rod is fixedly installed on the second plug, the other end of the second driving rod is fixedly connected to the connecting disk, a spring is fixedly installed between the second plug and the second driving cylinder, adapters are fixedly installed at both ends of the second driving cylinder, a plurality of connecting holes are provided on the adapter, the number of the connecting holes is the same as the number of the first driving cylinder, and both ends of the first driving cylinder are connected to the adapters at both ends of the second driving cylinder through oil pipes.

[0012] Optionally, the first driving cylinder, the second driving cylinder and the oil pipe are all filled with a transmission medium, and the transmission medium is a liquid that is incompressible under a working environment.

[0013] Optionally, a sliding sleeve is fixedly mounted on the second driving rod, a sliding block is slidably mounted in the sliding sleeve, a connecting rod is fixedly mounted on the sliding block, and the other end of the connecting rod is fixedly connected to the connecting disk.

[0014] Optionally, a plurality of the first driving cylinders are linearly arrayed between the base plate and the fastening rod, and a synchronization plate is fixedly mounted on the plurality of the first driving rods.

[0015] In summary, the present application includes at least one of the following beneficial technical effects:

[0016] The sling utilizes the internal expansion and friction of the tool to fix with the inner hole of the hoisted object, thereby achieving the effect of combining with the heavy object, thereby achieving the purpose of lifting and transporting the sling and the object together. After arriving at the destination, the sling is unhooked from the object by mechanical principles, which is automatic, convenient and fast. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural diagram of the spreader;

[0018] Figure 2 The figure is an exploded schematic diagram of the spreader;

[0019] Figure 3 Process when working with spreaders Figure 1 ;

[0020] Figure 4 Process when working with spreaders Figure 2 ;

[0021] Figure 5This is a detailed schematic diagram of the outer support plate;

[0022] Figure 6 Schematic diagram of the structure of the expansion release structure.

[0023] Figure numerals: 1. connecting box; 2. lifting ring; 201. hook; 202. lifting rod; 203. connecting plate; 204. conical groove; 205. outer support plate; 2051. base plate; 2052. fastening rod; 2053. corrugated line; 2054. sealing plate; 206. unhooking part; 3. first driving cylinder; 301. first plug; 302. first driving rod; 303. second driving cylinder; 304. second plug; 305. second driving rod; 306. spring; 307. adapter; 308. oil pipe; 309. sliding sleeve; 310. slider; 311. connecting rod; 312. synchronization plate. DETAILED DESCRIPTION

[0024] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0025] Embodiment 1, as Figures 1 to 4 As shown, the automatic unhooking inner hole lifting device proposed by the present invention includes a connection box 1, and also includes a lifting ring 2 slidably installed in the connection box 1, and a plurality of hooks 201 are rotatably installed on the lifting ring 2. An inner support rod with a conical structure pulled by the hook 201 is slidably installed in the connection box 1. A plurality of outer support pieces 205 are slidably installed on the connection box 1, and a conical surface is provided on the inner side of the outer support piece 205, and the conical surface is in contact with and consistent with the lifting rod 202. Since the outer support piece 205 is against the inner support rod, and since the inner support rod has a conical structure, the diameter of the contact point between the rising inner support rod and the outer support piece 205 is gradually increased, so that the plurality of outer support pieces 205 are moved outward. When a conical unhooking piece 206 is installed in the connection box 1, the unhooking piece 206 controls the hook 201 to detach from the inner support rod.

[0026] Furthermore, the inner support rod includes a lifting rod 202 slidably mounted inside the connection box 1, and a connection plate 203 fixedly mounted on the top of the lifting rod 202. The connection plate 203 is provided with a concave tapered groove 204, and the taper of the tapered groove 204 is consistent with the taper of the unhooking member 206. The tapered groove 204 can cover the unhooking member 206.

[0027] Working principle: first insert the sling into the hole for hanging objects, then continue to lower the lifting ring 2 to connect the hook 201 with the connecting plate 203, lift the lifting ring 2, and the inner support rod will also be lifted accordingly, and the outer support piece 205 will expand its diameter in all directions under the squeezing of the lifting rod 202, and be in close contact with the inner hole of the hanging object, and be fixed to the hanging object by friction. After the hanging object is moved to the destination, lower the lifting ring 2, and the inner support rod will also drop under the action of gravity until the inner support rod stops dropping, and continue to lower the lifting ring 2, and the hook 201 slides down through the upper cone of the unhooking piece 206 and passes through the maximum diameter of the unhooking piece 206 to the lower side of the unhooking piece 206, and as the lifting ring 2 is lifted, the unhooking piece 206 rises with the hook 201 until it rises to the connecting plate 203 and is in close contact, and the hook 201 slides over the unhooking piece 206 and smoothly reaches the outer side of the upper part of the inner support rod to achieve unhooking.

[0028] Embodiment 2, as Figure 1 and Figures 5 and 6 As shown, based on Example 1, the outer support sheet 205 includes a base plate 2051, a fastening rod 2052 slidably mounted on the base plate 2051, a corrugated line 2053 for increasing friction is provided on one side of the fastening rod 2052, and a flexible sealing plate 2054 is fixedly installed between the fastening rod 2052 and the base plate 2051. It should be noted that the pressure applied by the fastening rod 2052 to the hanging object depends on the weight of the hanging object and is in a proportional relationship, that is, the heavier the hanging object, the greater the pressure applied by the fastening rod 2052 to the hanging object, and the greater the friction between the fastening rod 2052 and the hanging object, and the magnitude of the pressure also depends on the magnitude of the taper of the lifting rod 202. When the taper of the lifting rod 202 is greater, that is, the closer it is to the vertical direction, the extrusion force applied by the lifting rod 202 to the base plate 2051 is closer to the horizontal state, and the extrusion force applied by the lifting rod 202 to the base plate 2051 is closer to the horizontal state. In the horizontal state, the greater the component force on the base plate 2051 in the horizontal direction, that is, the greater the pressure exerted by the fastening rod 2052 on the hanging object, in order to keep the pressure exerted by the fastening rod 2052 on the hanging object large enough, the taper of the lifting rod 202 is generally large, which will cause the diameter of the lifting rod 202 at the same height to change little when the lifting rod 202 is lifted, so the distance driven to move the outer support piece 205 will also be smaller, which is not conducive to lifting workpieces with large differences in inner holes. At this time, the width of the outer support piece 205 needs to be adjusted;

[0029] The general adjustment method is to adjust the distance between the fastening rod 2052 and the base plate 2051 through a screw rod. However, in order to ensure the stability of the distance between the fastening rod 2052 and the base plate 2051, the screw rod will bear a large axial force. When the thread is subjected to a large axial pressure, it is easy to be damaged. This is mainly due to the problem of stress concentration. There is stress concentration at the root of the thread. Especially under axial pressure, the root stress increases significantly, which can easily lead to cracks or fractures. Therefore, the threaded connection method is not conducive to extending the service life and enhancing the working intensity.

[0030] An expansion release structure is installed between the base plate 2051 and the fastening rod 2052. The expansion release structure drives the fastening rod 2052 away from the base plate 2051 as the connection plate 203 rises. By moving the fastening rod 2052 toward or away from the base plate 2051, the distance between the fastening rod 2052 and the base plate 2051 can be increased or decreased.

[0031] Further, the expansion release structure includes a plurality of first drive cylinders 3 fixedly mounted on the base plate 2051, a first plug 301 is slidably mounted in the first drive cylinder 3, a first drive rod 302 is fixedly mounted on the first plug 301, and the first drive rod 302 is fixedly connected to the fastening rod 2052. The moving first plug 301 will drive the first drive rod 302 to move, and the moving first drive rod 302 can drive the fastening rod 2052 to move.

[0032] Furthermore, the expansion release structure also includes a second drive cylinder 303 fixedly installed inside the connection box 1, a second plug 304 is slidably installed in the second drive cylinder 303, a second drive rod 305 is fixedly installed on the second plug 304, the other end of the second drive rod 305 is fixedly connected to the connection disk 203, a spring 306 is fixedly installed between the second plug 304 and the second drive cylinder 303, and adapters 307 are fixedly installed at both ends of the second drive cylinder 303. The adapters 307 are provided with a plurality of connection holes, and the number of the connection holes is the same as the number of the first drive cylinder 3. Both ends of the first drive cylinder 3 are connected to the adapters 307 at both ends of the second drive cylinder 303 through the oil pipe 308. The first drive cylinder 3, the second drive cylinder 303 and the oil pipe 308 are filled with a transmission medium, which is a liquid that cannot be compressed under the working environment. When the connecting disk 203 moves, it will drive the second driving rod 305 to move, and then drive the second plug 304 to move upward, thereby squeezing the hydraulic medium above the second driving cylinder 303 into the first driving cylinder 3, and squeezing the hydraulic medium on the left side of the first driving cylinder 3 into the second driving cylinder 303, and at the same time drive the first plug 301 to move to the left, thereby driving the fastening rod 2052 to extend outward, and when the fastening rod 2052 moves to the right, it is necessary to overcome the pulling force applied by the sling to the suspended object, and the pulling force should be greater than or equal to the gravity of the suspended object, thereby preventing the fastening rod 2052 from moving to the right, thereby ensuring the stability of the distance between the fastening rod 2052 and the base plate 2051.

[0033] It is worth noting that a sliding sleeve 309 is fixedly mounted on the second driving rod 305, a slider 310 is slidably mounted in the sliding sleeve 309, a connecting rod 311 is fixedly mounted on the slider 310, and the other end of the connecting rod 311 is fixedly connected to the connecting disk 203. The connecting disk 203 can have a certain degree of free lifting range, and the lifting of the connecting disk 203 within this range will not affect the position of the second plug 304.

[0034] The plurality of first driving cylinders 3 are linearly arrayed between the base plate 2051 and the fastening rod 2052, and a synchronization plate 312 is fixedly mounted on the plurality of first driving rods 302, so that the fastening rod 2052 can be subjected to balanced force.

[0035] The working principle of this embodiment is that when the connecting disk 203 moves, it will drive the second driving rod 305 to move, and then drive the second plug 304 to move upward, and then squeeze the hydraulic medium above the second driving cylinder 303 into the first driving cylinder 3, and squeeze the hydraulic medium on the left side of the first driving cylinder 3 into the second driving cylinder 303, and at the same time drive the first plug 301 to move to the left, and then drive the fastening rod 2052 to extend outward, and when the fastening rod 2052 moves to the right, it is necessary to overcome the pulling force applied by the sling to the suspended object, and the pulling force should be greater than or equal to the gravity of the suspended object, so that the fastening rod 2052 cannot move to the right, thereby ensuring the stability of the distance between the fastening rod 2052 and the base plate 2051.

[0036] The above specific embodiments are only several optional embodiments of the present invention. Based on the technical solutions of the present invention and the relevant inspirations of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. An automatic unhooking inner hole lifting device, comprising a connection box (1), characterized in that: Also includes: A lifting ring (2) is slidably mounted in a connection box (1), a plurality of hooks (201) are rotatably mounted on the lifting ring (2), an inner support rod with a conical structure pulled by the hook (201) is slidably mounted in the connection box (1), a plurality of outer support plates (205) are slidably mounted on the connection box (1), the outer support plates (205) expand or contract as the inner support rod rises and falls, a conical detaching member (206) is mounted in the connection box (1), and the detaching member (206) controls the hook (201) to detach from the inner support rod.

2. The automatic unhooking inner hole lifting device according to claim 1, characterized in that: The inner support rod comprises a lifting rod (202) slidably mounted inside the connection box (1), and a connection plate (203) fixedly mounted on the top of the lifting rod (202); a concave conical groove (204) is provided in the connection plate (203); the taper of the conical groove (204) is consistent with the taper of the decoupling member (206).

3. The automatic unhooking inner hole lifting device according to claim 2, characterized in that: A conical surface is provided on the inner side of the outer support sheet (205), and the conical surface is in contact with and consistent with the lifting rod (202).

4. The automatic unhooking inner hole lifting device according to claim 3, characterized in that: The outer support sheet (205) comprises a base plate (2051), a fastening rod (2052) slidably mounted on the base plate (2051), a corrugated line (2053) for increasing friction is provided on one side of the fastening rod (2052), and a flexible sealing plate (2054) is fixedly mounted between the fastening rod (2052) and the base plate (2051).

5. The automatic unhooking inner hole lifting device according to claim 4, characterized in that: An expansion release structure is installed between the base plate (2051) and the fastening rod (2052), and the expansion release structure drives the fastening rod (2052) to move away from the base plate (2051) as the connecting plate (203) rises.

6. The automatic unhooking inner hole lifting device according to claim 5, characterized in that: The expansion release structure comprises a plurality of first driving cylinders (3) fixedly mounted on a base plate (2051), a first plug (301) being slidably mounted inside the first driving cylinder (3), a first driving rod (302) being fixedly mounted on the first plug (301), and the first driving rod (302) being fixedly connected to the fastening rod (2052).

7. The automatic unhooking inner hole lifting device according to claim 6, characterized in that: The expansion release structure also includes a second driving cylinder (303) fixedly installed inside the connecting box (1), a second plug (304) being slidably installed inside the second driving cylinder (303), a second driving rod (305) being fixedly installed on the second plug (304), the other end of the second driving rod (305) being fixedly connected to the connecting disk (203), a spring (306) being fixedly installed between the second plug (304) and the second driving cylinder (303), an adapter (307) being fixedly installed at both ends of the second driving cylinder (303), a plurality of connecting holes being provided on the adapter (307), the number of the connecting holes being the same as the number of the first driving cylinder (3), and both ends of the first driving cylinder (3) being connected to the adapters (307) at both ends of the second driving cylinder (303) through oil pipes (308).

8. The automatic unhooking inner hole lifting device according to claim 7, characterized in that: The first driving cylinder (3), the second driving cylinder (303) and the oil pipe (308) are all filled with a transmission medium, and the transmission medium is a liquid that cannot be compressed under the working environment.

9. The automatic unhooking inner hole lifting device according to claim 8, characterized in that: A sliding sleeve (309) is fixedly mounted on the second driving rod (305), a sliding block (310) is slidably mounted inside the sliding sleeve (309), a connecting rod (311) is fixedly mounted on the sliding block (310), and the other end of the connecting rod (311) is fixedly connected to the connecting disk (203).

10. The automatic unhooking inner hole lifting device according to claim 9, characterized in that: A plurality of the first driving cylinders (3) are linearly arrayed between the base plate (2051) and the fastening rod (2052), and a synchronization plate (312) is fixedly mounted on the plurality of the first driving rods (302).

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