Lifting device for air circulation furnace

Abstract

The utility model relates to the technical field of hoisting equipment, and discloses a lifting device for an air circulation furnace, which comprises a lifting part, the lifting part comprises a support and a driving hydraulic cylinder, the support is connected with a lifting movable frame in a sliding manner, and the lifting movable frame is connected with the driving hydraulic cylinder; the lifting part further comprises a lifting rod and two sets of symmetrically-arranged combined pulley units. Each combined pulley unit comprises a steel cable, a guide pulley block and a plurality of distance reducing pulley blocks. By arranging a proper amount of distance reducing pulley blocks, the length of the driving hydraulic cylinder can be reduced exponentially, the size of the driving hydraulic cylinder is effectively reduced, the positions of other parts are reasonably arranged, and the overall structure is compact; by arranging the limiting clamping piece, the situation that the tool rapidly falls off due to failure of the acting force of the driving hydraulic cylinder can be prevented, and the overall safety and reliability of the lifting part are improved; and by arranging the adjusting screw rod, the position of the tool is slightly influenced by the length of the steel cable in the debugging stage of the lifting part, and debugging is more convenient and faster.

Description

TECHNICAL FIELD

[0001] The utility model relates to hoisting equipment technical field, concretely is a kind of lifting device for air circulation furnace. BACKGROUND

[0002] Air circulation furnace is widely used in material heating, drying and heat treatment process in industrial production, its structure is usually relatively huge and heavy, installation, maintenance and handling work to lifting device has higher requirement.With the development of industrial automation and equipment large-scale, traditional manual handling and simple hoisting method has been unable to meet the efficient, safe demand of modern production.Common lifting device usually adopts electric hoist, bridge crane, pulley system etc.form, in combination with accurate hoisting machinery and sling, can complete the hoisting task of air circulation furnace in smaller space.Technology development makes hoisting device not only improve work efficiency, but also can ensure the safety and accuracy in hoisting process.

[0003] In existing bridge crane, its volume is relatively large, there is certain requirement to operation field;Electric hoist is complex structure, high cost, and difficult to maintain in later period;For small and medium-sized enterprises, in the production of smaller load, lower frequency of use, precision has certain requirement, hydraulic cylinder cooperates pulley hoisting more cost-effective;And existing pulley hoisting usually is to sacrifice distance to obtain reduced load, due to the limited length of hydraulic cylinder, this leads to driving force still needs motor and other equipment to provide, and it will lead to high cost, low precision and difficult to maintain in later period. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a kind of lifting device for air circulation furnace, lifting is carried out using pulley block and hydraulic cylinder, solve the problem of existing lifting device, difficult to maintain in later period, high investment cost, large equipment floor space.

[0005] The utility model discloses a lifting device for air circulation furnace, including lifting portion, the lifting portion includes support, drive hydraulic cylinder, and support, drive hydraulic cylinder all install on the operation platform, the support is connected with the lifting movable frame of sliding on, lifting movable frame is connected with drive hydraulic cylinder, the lifting portion still includes hoist lever and two groups of symmetric setting combination sheave unit, combination sheave unit includes steel cable, guide sheave group and a plurality of distance reduction sheave group, one end of steel cable is connected on the support, and the other end is connected on hoist lever, distance reduction sheave group includes fixed pulley group, movable pulley group, fixed pulley group includes fixed pulley seat, fixed pulley, fixed pulley seat installs on the support, and fixed pulley is rotatably connected on fixed pulley seat, movable pulley group includes movable pulley, and movable pulley is rotatably connected on lifting movable frame, guide sheave group includes guide pulley seat, guide pulley, and guide pulley seat installs on the circulation furnace, and guide pulley is rotatably connected on guide pulley seat, one end of steel cable near the support is in'S' shape and is in turn set on the fixed pulley, movable pulley of each distance reduction sheave group, and then is set on guide pulley, and is connected with hoist lever again.

[0006] In order to better realize the utility model, further, two groups of limit clamping pieces are symmetrically installed on the support, the limit clamping piece includes limit support, limit hydraulic cylinder, the limit support is installed on the support, the limit hydraulic cylinder is installed on the limit support, the lifting movable frame is provided with the embedded hole, and the limit hydraulic cylinder is embedded with the embedded hole to complete the limit.

[0007] In order to better realize the utility model, further, one end of the steel cable near the hoist lever is provided with an anti-fusion rod piece.

[0008] In order to better realize the utility model, further, an adjusting seat is installed on the support, an adjusting screw is threadedly connected on the adjusting seat, and one end of the steel cable near the support is connected with the adjusting screw.

[0009] In order to better realize the utility model, further, a sliding rail is installed on the support, a roller is installed on the lifting movable frame, and the roller is matched with the sliding rail.

[0010] In order to better realize the utility model, further, limit bolts are arranged on the guide pulley seat, the fixed pulley seat and the lifting movable frame, and the limit bolts are used for limiting the steel cable.

[0011] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0012] (1) The utility model discloses a proper amount of distance reduction pulley block is set, can multiply the length of driving hydraulic cylinder is reduced, effectively reduces its volume, and then the position of other components is reasonably arranged, makes the overall structure compact, and convenient, and the cost of investment is lower, and the cost performance is high, is suitable for small and medium enterprise production uses, and the utility model discloses a proper amount of distance reduction pulley block is set, can multiply the length of driving hydraulic cylinder is reduced, effectively reduces its volume, and then the position of other components is reasonably arranged, makes the overall structure compact, and convenient, and the cost of investment is lower, and the cost performance is high, is suitable for small and medium enterprise production uses,

[0013] (2) The utility model discloses a proper amount of distance reduction pulley block is set, can multiply the length of driving hydraulic cylinder is reduced, effectively reduces its volume, and then the position of other components is reasonably arranged, makes the overall structure compact, and convenient, and the cost of investment is lower, and the cost performance is high, is suitable for small and medium enterprise production uses,

[0014] (3) The utility model discloses a proper amount of distance reduction pulley block is set, can multiply the length of driving hydraulic cylinder is reduced, effectively reduces its volume, and then the position of other components is reasonably arranged, makes the overall structure compact, and convenient, and the cost of investment is lower, and the cost performance is high, is suitable for small and medium enterprise production uses, BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is schematic diagram of the utility model and matched equipment.

[0016] Figure 2 It is schematic diagram of the utility model hoisting state structure.

[0017] Figure 3 It is schematic diagram of the utility model overall structure.

[0018] Figure 4 It is schematic diagram of slide rail, lifting movable frame structure.

[0019] Figure 5 It is schematic diagram of combined pulley unit structure.

[0020] Figure 6 It is schematic diagram of adjusting seat, adjusting screw structure.

[0021] Figure 7 It is schematic diagram of limiting support, limiting hydraulic cylinder structure.

[0022] Figure 8 It is schematic diagram of lifting movable frame, embedded hole structure.

[0023] Among them: 1-workbench;2-circulating furnace;3-lifting part;4-tool;301-support;302-guardrail;303-steel cable;304-anti-melting rod piece;305-hoisting rod;306-guide pulley seat;307-guide pulley;308-slide rail;309-lifting movable frame;310-limiting support;311-driving hydraulic cylinder;312-limiting hydraulic cylinder;313-roller;314-fixed pulley seat;315-fixed pulley;316-limiting bolt;317-moving pulley;318-adjusting seat;319-adjusting screw;320-embedded hole. DETAILED DESCRIPTION

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 internal connection of 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.

[0026] Example 1:

[0027] This embodiment provides a lifting device for an air circulation furnace, specifically as follows: Figures 1-5 As shown, the system includes a lifting section 3, which includes a support 301 and a driving hydraulic cylinder 311. Both the support 301 and the driving hydraulic cylinder 311 are mounted on the work platform 1, and 301 is also mounted on the work platform 2. A guardrail 302 is installed on the support 301. A lifting movable frame 309 is slidably connected to the support 301, and the lifting movable frame 309 is connected to the driving hydraulic cylinder 311. The lifting section 3 also includes a hoisting rod 305 and two sets of symmetrically arranged combined pulley units. The combined pulley unit includes a steel cable 303, a guide pulley group, and multiple reduction pulley groups. One end of the steel cable 303 is connected to the support 301, and the other end is connected to the hoisting rod 305. The reducing pulley system includes a fixed pulley system and a movable pulley system. The fixed pulley system includes a fixed pulley seat 314 and a fixed pulley 315. The fixed pulley seat 314 is mounted on the bracket 301, and the fixed pulley 315 is rotatably connected to the fixed pulley seat 314. The movable pulley system includes a movable pulley 317, which is rotatably connected to the lifting frame 309. The guide pulley system includes a guide pulley seat 306 and a guide pulley 307. The guide pulley seat 306 is mounted on the circulating furnace 2, and the guide pulley 307 is rotatably connected to the guide pulley seat 306. The end of the steel cable 303 near the bracket 301 is sequentially sleeved in an "S" shape on the fixed pulley 315 and the movable pulley 317 of each reducing pulley system, then sleeved on the guide pulley 307, and finally connected to the lifting rod 305.

[0028] When the tooling 4 needs to be hoisted into the circulating furnace 2 for processing, the driving hydraulic cylinder 311 starts to retract, at this time, since one end of the steel cable 303 is fixed on the support 301, the lifting movable frame 309 pulls the steel cable 303 by driving the pulley 317, so that the hoisting rod 305 hoists the tooling 4 hung thereon. When the tooling 4 is processed, the driving hydraulic cylinder 311 extends, at this time, the tooling 4 in the circulating furnace 2 starts to descend to the initial position when the tooling 4 is loaded.

[0029] In the embodiment, the number of distance-reducing pulley sets is 2, so that the hoisting distance of the tooling 4 is 4 times of the retraction amount of the driving hydraulic cylinder 311; and the symmetrical combination pulley unit is arranged to improve the hoisting stability of the hoisting rod 305.

[0030] By arranging appropriate distance-reducing pulley sets, the length of the driving hydraulic cylinder 311 can be reduced by several times, the volume of the driving hydraulic cylinder 311 is effectively reduced, and the positions of other components are reasonably arranged, so that the overall structure is compact.

[0031] Embodiment 2:

[0032] The embodiment is further expanded on the basis of the above-mentioned embodiments, and specifically as shown in Figures 7-8 Two sets of limiting clamping pieces are symmetrically arranged on the support 301, the limiting clamping piece comprises a limiting support 310 and a limiting hydraulic cylinder 312, the limiting support 310 is arranged on the support 301, and the limiting hydraulic cylinder 312 is arranged on the limiting support 310, the lifting movable frame 309 is provided with an embedded hole 320, and the limiting hydraulic cylinder 312 is embedded in the embedded hole 320 to complete the limiting.

[0033] When the driving hydraulic cylinder 311 retracts, the tooling 4 is in the circulating furnace 2, at this time, the limiting hydraulic cylinder 312 extends and is inserted into the embedded hole 320, since the limiting support 310 supports the output rod of the limiting hydraulic cylinder 312, even if the driving hydraulic cylinder 311 no longer pressurizes at this time, the lifting movable frame 309 will not be pulled upward by the tooling 4 under the buckling action of the limiting hydraulic cylinder 312, so as to prevent the tooling 4 from falling rapidly due to the failure of the driving hydraulic cylinder 311, and improve the safety and reliability of the lifting part 3.

[0034] The other parts of the embodiment are the same as those of the above-mentioned embodiments, and will not be described herein.

[0035] Embodiment 3:

[0036] The embodiment is further expanded on the basis of the above-mentioned embodiments, and specifically as shown in Figure 3 The end of the steel cable 303 close to the hoisting rod 305 is provided with a melting-preventing rod piece 304.

[0037] When tooling 4 is processed in circulating furnace 2, circulating furnace 2 will heat tooling 4 at high temperature. In order to prevent a large amount of heat from being transferred to steel cable 303 and causing steel cable 303 to deform, the part of 303 that extends into the circulating furnace is replaced by anti-melting rod 304. Since the melting point of anti-melting rod 304 is much higher than that of steel cable 303, it can prevent it from deforming at high temperature.

[0038] The other parts of this embodiment are the same as those in the above embodiments, and will not be described again.

[0039] Example 4:

[0040] This embodiment further extends the above embodiment, specifically as follows: Figure 6 As shown, an adjusting seat 318 is installed on the bracket 301, and an adjusting screw 319 is threadedly connected to the adjusting seat 318. The end of the steel cable 303 near the bracket 301 is connected to the adjusting screw 319.

[0041] To achieve the engagement of the limiting hydraulic cylinder 312 with the fitting hole 320, the extension and retraction of the driving hydraulic cylinder 311 is usually fixed. During the initial debugging of the lifting section 3, it is necessary to ensure that the tooling 4 maintains its preset position in the circulating furnace 2 after the driving hydraulic cylinder 311 retracts. However, the length of the lifting section 3 is calculated using ideal data, and due to losses at the connection points and cutting errors, the tooling 4 may ultimately fail to maintain its preset position. Therefore, an adjusting screw 319 is provided. When the driving hydraulic cylinder 311 retracts and the limiting hydraulic cylinder 312 inserts into the fitting hole 320, rotating the adjusting screw 319 pulls the steel cable 303, fine-tuning the position of the tooling 4 until its actual position matches the preset ideal position. By setting the adjusting seat 318 and the adjusting screw 319, the position of the tooling 4 is less affected by the length of the steel cable 303 during the debugging phase of the lifting section 3, making debugging more convenient and faster.

[0042] The other parts of this embodiment are the same as those in the above embodiments, and will not be described again.

[0043] Example 5:

[0044] This embodiment further extends the above embodiment, specifically as follows: Figure 4 , Figure 7 As shown, a slide rail 308 is installed on the bracket 301, and a roller 313 is installed on the lifting frame 309. The roller 313 cooperates with the slide rail 308.

[0045] By setting rollers 313 and slide rails 308, the friction of the sliding of the lifting frame 309 is reduced, the kinetic energy loss is reduced, and the stability of the movement of the lifting frame 309 is improved.

[0046] Other parts of the embodiment are the same as the above-described embodiments, and will not be repeated.

[0047] Embodiment 6:

[0048] The embodiment is further extended on the basis of the above-described embodiments, and specifically as shown in Figure 3 、 Figure 5 A limiting bolt 316 is arranged on the guide pulley seat 306, the fixed pulley seat 314 and the lifting movable frame 309, and the limiting bolt 316 is used for limiting the steel cable 303.

[0049] When the tool 4 is not hoisted, the steel cable 303 is easy to fall off under the plastic deformation force without load, and the limiting bolt 316 is arranged on the guide pulley seat 306, the fixed pulley seat 314 and the lifting movable frame 309 to limit the steel cable 303, so that the above-mentioned situation can be effectively prevented, and the operation stability of the lifting part 3 is further improved.

[0050] Other parts of the embodiment are the same as the above-described embodiments, and will not be repeated.

[0051] The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form, and any simple modification and equivalent change according to the technical essence of the utility model are within the protection scope of the utility model.

Claims

1. A lifting device for an air circulation oven, characterized by: The lifting part (3) comprises a support (301), a driving hydraulic cylinder (311), the support (301) and the driving hydraulic cylinder (311) are installed on the operation table (1), a lifting movable frame (309) is slidably connected on the support (301), and the lifting movable frame (309) is connected with the driving hydraulic cylinder (311); the lifting part (3) further comprises a hoisting rod (305) and two groups of symmetrical combined pulley units, the combined pulley unit comprises a steel cable (303), a guide pulley group and a plurality of distance-reducing pulley groups; one end of the steel cable (303) is connected to the support (301), and the other end is connected to the hoisting rod (305); The distance-reducing pulley group comprises a fixed pulley group and a movable pulley group; the fixed pulley group comprises a fixed pulley seat (314) and a fixed pulley (315), the fixed pulley seat (314) is installed on the support (301), and the fixed pulley (315) is rotatably connected to the fixed pulley seat (314); the movable pulley group comprises a movable pulley (317), and the movable pulley (317) is rotatably connected to the lifting movable frame (309); The guide pulley group comprises a guide pulley seat (306) and a guide pulley (307), the guide pulley seat (306) is installed on the circulating furnace (2), and the guide pulley (307) is rotatably connected to the guide pulley seat (306); The end of the steel cable (303) close to the support (301) is sequentially sleeved on the fixed pulley (315) and the movable pulley (317) of each group of distance-reducing pulley groups in an "S" shape, and then is sleeved on the guide pulley (307), and finally is connected with the hoisting rod (305).

2. A lifting device for an air circulation oven according to claim 1, characterized in that: Two groups of limiting clamping pieces are symmetrically installed on the support (301), the limiting clamping piece comprises a limiting support (310) and a limiting hydraulic cylinder (312), the limiting support (310) is installed on the support (301), the limiting hydraulic cylinder (312) is installed on the limiting support (310), the lifting movable frame (309) is provided with an embedded hole (320), and the limiting hydraulic cylinder (312) is embedded in the embedded hole (320) to complete limiting.

3. A lifting device for an air circulation oven according to claim 1, characterized in that: The end of the steel cable (303) close to the hoisting rod (305) is provided with an anti-fusion rod (304).

4. A lifting device for an air circulation oven according to claim 1, characterized in that: An adjusting seat (318) is installed on the support (301), an adjusting screw rod (319) is threadedly connected to the adjusting seat (318), and the end of the steel cable (303) close to the support (301) is connected with the adjusting screw rod (319).

5. A lifting device for an air circulation oven as claimed in claim 1, characterized in that: A sliding rail (308) is installed on the support (301), and a roller (313) is installed on the lifting movable frame (309) and matched with the sliding rail (308).

6. A lifting device for an air circulation oven according to claim 1, characterized in that: Limiting bolts (316) are arranged on the guide pulley seat (306), the fixed pulley seat (314) and the lifting movable frame (309), and the limiting bolts (316) are used for limiting the steel cable (303).

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