A lifting mechanism suitable for obliquely setting manhole covers at arc-shaped heads
By designing a lifting mechanism suitable for the arc-shaped head and utilizing the cooperation of the sliding position adjustment mechanism and the limiter, the safety hazard of the existing technology that the lifting arm cannot be applied to the oblique manhole cover is solved, and the safe and reliable lifting of the manhole cover is achieved.
Patent Information
- Application Number
- CN202310979708.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2023-08-07
- Publication Date
- 2025-09-30
- Estimated Expiration
- 2043-08-07
AI Technical Summary
The existing boom lifting mechanism is not suitable for the manhole cover set obliquely at the arc head, which leads to safety hazards during the rotation of the boom, especially the heavy manhole cover poses a danger to the operator when it falls quickly.
A lifting mechanism is designed, which includes a support, a rotating arm, a sliding mechanism, a hook mechanism and a sliding position adjustment mechanism. By setting the lifting mechanism at an angle of 40° to 50° with the horizontal plane and utilizing the sliding position adjustment mechanism to make the sliding mechanism slide between the limit pieces, the opening and closing lifting operation of the manhole cover is ensured to be safe and reliable.
The hoisting safety of the manhole cover obliquely set at the arc head is improved, the sudden falling of the manhole cover during the hoisting process is avoided, and the safety of the operator is ensured.
Smart Images
Figure CN117105141B_ABST
Abstract
Description
Technical field
[0001] The invention relates to the field of chemical machinery, and in particular to a hoisting mechanism suitable for obliquely arranging a manhole cover at an arc-shaped head. [Background Technology]
[0002] A reaction vessel is a container used to carry out physical and chemical reactions in a medium. In industrial production, particularly in the chemical, pharmaceutical, fertilizer, and refining industries, reaction vessels are used extensively as pressure-bearing equipment due to process requirements. To facilitate installation and maintenance, a manhole and manhole cover are typically installed on the reaction vessel. Therefore, the manhole and manhole cover are crucial components of the reaction vessel. The design must consider both the ease of opening and closing the manhole cover and, since the reaction vessel is a large piece of equipment, the safety of on-site operators must also be considered during the opening and closing process.
[0003] Please refer to Chinese Patent No. 201620487015.X, which discloses a boom lifting mechanism, including a boom support and a boom connected to the boom support, the boom lifting mechanism is used to lift the manhole cover of the reaction vessel, the boom support is connected and fixed to the tank body of the reaction vessel, the boom includes a column and a boom beam connected to the column, the head of the boom beam is connected to the shaft sleeve, a boom is mounted in the shaft sleeve, the boom is mounted above the shaft sleeve with a handwheel for driving the boom to rotate, a hook is provided below the boom, and its working principle is: by turning the handwheel, the boom moves upward under the action of the transmission thread, thereby opening the manhole cover, and then the entire boom is rotated relative to the sleeve, so that the manhole cover and the manhole are staggered, making it convenient for operators to enter and exit the manhole for maintenance. The defect of this boom lifting mechanism is that it can only be applied to the horizontally arranged manhole cover with a flat head, and is not applicable to the manhole cover arranged obliquely at the curved head, because there is no limit in the process of rotation of the entire boom relative to the casing. Therefore, when this mechanism is applied to the horizontally arranged manhole cover, there is no problem. The rotation angle of the entire boom depends on the operation of the operator (that is, the boom stays at the position to which the operator rotates), which is safe and reliable. However, if this boom lifting mechanism is applied to the manhole cover arranged obliquely at the curved head, it is not applicable. When this boom lifting mechanism is applied to the manhole cover arranged obliquely at the curved head, the entire boom will quickly fall to the lowest position under the action of gravity during the rotation process. The reaction vessel is a large equipment and the manhole cover is also heavy. Therefore, the manhole cover will bring safety hazards to the operator operating on the side during this rapid falling process.
[0004] Therefore, it is necessary to provide a lifting mechanism suitable for obliquely arranging a manhole cover at an arc-shaped head to solve the above-mentioned technical problems. [Summary of the invention]
[0005] In order to solve the above problems, the purpose of the present invention is to provide a lifting mechanism which has a simple structure and is easy to install and is applicable to the oblique arrangement of manhole covers at arc-shaped heads.
[0006] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a lifting mechanism suitable for obliquely setting a manhole cover at an arc-shaped head, comprising: a support, a rotating arm, a sliding mechanism, a hook mechanism and a sliding position adjustment mechanism, the support comprising: a pad, a vertical bracket, an oblique bracket and a first support plate, the pad is welded to the arc-shaped head, the vertical bracket is welded to the pad, one of the free ends of the oblique bracket is welded to the vertical bracket, and the other free end of the oblique bracket is welded to the first support plate, the rotating arm comprises an I-shaped support beam, a second support plate arranged at one free end of the I-shaped support beam and a mounting plate arranged at the other free end of the I-shaped support beam, the second support plate of the rotating arm is welded to the support The cam is connected to the second support member by a first end and a second end, and the cam is connected to the first support member by a second end contact member, wherein the cam is connected to the second support member by a first end and a second end contact member, and the cam is connected to the second support member by a second end contact member.
[0007] The second end of the second wheel shaft is fixed with the first end cap and the second end cap being fixed with the first end cap and the second end cap respectively.
[0008] Preferably, a lifting mechanism suitable for obliquely setting a manhole cover at an arc-shaped head in the present invention is further configured as follows: a first connecting plate and a second connecting plate are welded on the first support plate, a third connecting plate and a fourth connecting plate are welded on the second support plate, and the first connecting plate, the second connecting plate, the third connecting plate and the fourth connecting plate are connected by connecting studs and nuts to form a rotatable connection between the first support plate and the second support plate.
[0009] Preferably, a hoisting mechanism suitable for obliquely arranging a manhole cover at an arc-shaped head in the present invention is further configured as follows: the I-shaped support beam of the rotating arm is arranged at an angle of 40° to 50° to the horizontal plane.
[0010] Preferably, a lifting mechanism suitable for obliquely setting a manhole cover at an arc-shaped head in the present invention is further configured as follows: a connecting plate is provided between the first end plate and the second end plate of the sliding mechanism, and the free end of the adjusting screw is welded to the connecting plate.
[0011] Preferably, a lifting mechanism suitable for obliquely setting a manhole cover at an arc-shaped head in the present invention is further configured as follows: the hook mechanism includes: an upper screw, a lower screw and a spiral sleeve, the spiral sleeve includes an upper adjusting nut, a lower adjusting nut and a connecting piece arranged between the upper adjusting nut and the lower adjusting nut, the connecting piece includes a first arc-shaped piece and a second arc-shaped piece, a first long groove and a second long groove are formed between the first arc-shaped piece and the second arc-shaped piece, a first pin groove is provided at the bottom of the upper screw, and a second pin groove is provided at the top of the lower screw, a third cotter pin passes through the first long groove, the first pin groove and the second long groove in sequence and then forks to achieve locking between the upper screw and the spiral sleeve, and a fourth cotter pin passes through the first long groove, the second pin groove and the second long groove in sequence and then forks to achieve locking between the lower screw and the spiral sleeve.
[0012] Preferably, the hoisting mechanism for obliquely arranging a manhole cover at an arc-shaped head in the present invention is further configured as follows: a plurality of round steel pieces are welded on the adjusting nut.
[0013] Preferably, a hoisting mechanism suitable for obliquely arranging a manhole cover at an arc-shaped head in the present invention is further configured as follows: the vertical bracket and the oblique bracket of the support are both made of H-shaped steel.
[0014] Preferably, a hoisting mechanism suitable for obliquely arranging a manhole cover at an arc-shaped head in the present invention is further configured as follows: the adjusting screw is arranged in parallel with the I-shaped support beam.
[0015] Preferably, a lifting mechanism suitable for obliquely setting a manhole cover at an arc-shaped head in the present invention is further configured as follows: the first limiting member is arranged at the middle section of the I-shaped support beam, and the second limiting member is arranged at the free end of the I-shaped support beam. The first limiting member is a limiting plate, and the limiting plate is welded in the I-shaped support beam. The second limiting member is a limiting angle steel member, and the limiting angle steel member is fixed in the I-shaped support beam by bolts.
[0016] Compared with the prior art, the present invention has the following beneficial effects: since the installation space of the arc-shaped head is relatively cramped, the present invention sets the lifting mechanism as a whole at an angle of 40° to 50° to the horizontal plane, thereby facilitating the lifting operation of the manhole cover. Since the lifting mechanism is set at an angle as a whole, the position of the sliding mechanism cannot be positioned during the sliding process. Therefore, the present invention sets a sliding position adjustment mechanism to enable the sliding mechanism to slide to any position between the first limit member and the second limit member, thereby making the opening and closing lifting operation of the manhole cover safe and reliable, and greatly improving the safety performance.
Brief Description of the Drawings
[0017] Figure 1 It is a structural schematic diagram of the lifting mechanism in the present invention.
[0018] Figure 2 It is a side view structural diagram of the sliding mechanism and the I-shaped support beam.
[0019] Figure 3 For the Figure 1 Schematic diagram of the structure of AA shown.
[0020] Figure 4 for Figure 1 A partial enlarged view of point B in the middle.
[0021] Figure 5 Schematic diagram of the structure of the spiral sleeve.
[0022] Figure 6 For the Figure 5 Schematic diagram of the cross-sectional structure of the CC line shown.
[0023] Figure 7 For the Figure 5 Schematic diagram of the cross-sectional structure of line DD shown.
[0024] Figure 8 It is a structural schematic diagram of the lifting mechanism of the present invention lifting the manhole cover.
[0025] Figures 1 to 8Middle: 1. Support, 10. Pad, 11. Vertical Bracket, 12. Oblique Bracket, 13. First Support Plate, 130. First Connecting Plate, 131. Second Connecting Plate, 132. Connecting Stud, 133. Nut, 2. Rotating Arm, 20. I-Shaped Support Beam, 200. First Limiting Member, 201. Second Limiting Member, 21. Second Support Plate, 210. Third Connecting Plate, 211. Fourth Connecting Plate, 22. Mounting Plate, 3. Sliding Mechanism, 30. First End Plate, 300. Connecting Plate, 31. Second End Plate, 32. Load-Bearing Stud, 33. Pulley Assembly, 330. First Axle, 331. Second Axle, 332. First Pulley, 333. Second Pulley, 34. First Nut, 35, second nut, 36, third nut, 37, first cotter pin, 38, fourth nut, 39, second cotter pin, 4, hook mechanism, 40, upper screw, 400, first pin groove, 41, lower screw, 410, second pin groove, 42, spiral sleeve, 420, upper adjusting nut, 421, lower adjusting nut, 422, connecting piece, 4220, first arc-shaped piece, 4221, second arc-shaped piece, 4222, first long groove, 4223, second long groove, 43, third cotter pin, 44, fourth cotter pin, 5, sliding position adjustment mechanism, 50, adjusting screw, 51, adjusting nut, 510, round steel part, 6, arc-shaped head, 7, manhole cover, 8, manhole. [Specific implementation method]
[0026] The following is a further detailed description of a hoisting mechanism for obliquely arranging a manhole cover at an arc-shaped head according to the present invention through specific embodiments.
[0027] Ginseng Figures 1 to 8 As shown, a lifting mechanism suitable for obliquely setting a manhole cover at an arc-shaped head includes: a support 1, a rotating arm 2, a sliding mechanism 3, a hook mechanism 4 and a sliding position adjustment mechanism 5, the support 1 includes: a pad 10, a vertical bracket 11, an oblique bracket 12 and a first support plate 13, the pad 10 is welded to the arc-shaped head 6, the vertical bracket 11 is welded to the pad 10, one of the free ends of the oblique bracket 12 is welded to the vertical bracket 11, and the other free end of the oblique bracket 12 is welded to the first support plate 13. In this embodiment, the vertical bracket 11 and the oblique bracket 12 are both made of H-shaped steel.
[0028] The pivot arm 2 includes an I-shaped support beam 20, a second support plate 21 provided at one free end of the I-shaped support beam 20, and a mounting plate 22 provided at the other free end of the I-shaped support beam 20. The I-shaped support beam 20 is arranged at an angle of 40° to 50° with the horizontal plane. This provides sufficient space for the hoisting operation of the manhole cover. The second support plate 21 of the pivot arm 2 is rotatably connected to the first support plate 13 of the support 1. Specifically, in this embodiment, a first connecting plate 130 and a second connecting plate 131 are welded to the first support plate 13, and a third connecting plate 210 and a fourth connecting plate 211 are welded to the second support plate 21. The first connecting plate 130, the second connecting plate 131, the third connecting plate 210, and the fourth connecting plate 211 are connected by connecting studs 132 and nuts 133, thereby forming a rotatable connection between the first support plate 13 and the second support plate 21.
[0029] The sliding mechanism 3 includes: a first end plate 30, a second end plate 31 and a load-bearing stud 32 arranged between the first end plate 30 and the second end plate 31 and at least two pulley assemblies 33, the load-bearing stud 32 is arranged in a stepped shaft with a width in the middle and narrow sides, one end of the load-bearing stud 32 passes through the first end plate 30 and is fixed by a first nut 34, the other end of the load-bearing stud 32 passes through the second end plate 31 and is fixed by a second nut 35, each pulley assembly 33 includes a first wheel shaft 330, a second wheel shaft 331, a first pulley 332 and a second pulley 333, the first wheel shaft 330 and the second wheel shaft 331 are connected to each other. The center lines of the two axles 331 are located on the same straight line. The first axle 330 and the second axle 331 are both set as stepped axles with a width in the middle and narrow sides. The first pulley 332 is installed on the first axle 330. One end of the first axle 330 passes through the first end plate 30 and is fixed by the third nut 36. The other end of the first axle 330 is positioned by the first cotter pin 37. The second pulley 333 is installed on the second axle 331. One end of the second axle 331 passes through the second end plate 31 and is positioned by the fourth nut 38. The other end of the second axle 331 is positioned by the second cotter pin 39. The first pulley 332 and the second pulley 333 are both supported on the I-shaped support beam 20 and can slide back and forth along the I-shaped support beam 20. The hook mechanism 4 is sleeved on the load-bearing stud 32. The hook mechanism 4 includes: an upper screw 40, a lower screw 41 and a spiral sleeve 42. The spiral sleeve 42 includes an upper adjusting nut 420, a lower adjusting nut 421 and a connecting member 422 arranged between the upper adjusting nut 420 and the lower adjusting nut 421. The connecting member 422 includes a first arc-shaped member 4220 and a second arc-shaped member 4221. A first long groove 4222 and a second long groove 4221 are formed between the first arc-shaped member 4220 and the second arc-shaped member 4221. The second long groove 4223, the bottom of the upper screw rod 40 is provided with a first pin groove 400, the top of the lower screw rod 41 is provided with a second pin groove 410, the third cotter pin 43 passes through the first long groove 4222, the first pin groove 400 and the second long groove 4223 in sequence and then forks to achieve the locking between the upper screw rod 40 and the spiral sleeve 42, the fourth cotter pin 44 passes through the first long groove 4222, the second pin groove 410 and the second long groove 4223 in sequence and then forks to achieve the locking between the lower screw rod 41 and the spiral sleeve 42. The setting of this structure can avoid the manhole cover from falling suddenly due to thread slippage, thereby greatly improving the safety performance.
[0030] A first limiting member 200 and a second limiting member 201 are provided in the I-shaped support beam 20 so that the sliding mechanism 3 can slide between the first limiting member 200 and the second limiting member 201. The first limiting member 200 is provided at the middle section of the I-shaped support beam 20, and the second limiting member 201 is provided at the free end of the I-shaped support beam 20. In this embodiment, the first limiting member 200 is a limiting plate, which is welded in the I-shaped support beam 20, and the second limiting member 201 is a limiting angle steel, which is fixed in the I-shaped support beam 20 by bolts.
[0031] The sliding position adjustment mechanism 5 includes: an adjustment screw 50 and an adjustment nut 51. The adjustment screw 50 is arranged parallel to the I-shaped support beam 20 and is arranged at an angle of 40° to 50° with the horizontal plane. One of the free ends of the adjustment screw 50 is fixedly connected to the sliding mechanism 3. Specifically, in this embodiment, a connecting plate 300 is provided between the first end plate 30 and the second end plate 31 of the sliding mechanism 3, and the free end of the adjustment screw 50 is welded to the connecting plate 300. The other free end of the adjustment screw 50 passes through the mounting plate 22 and cooperates with the adjustment nut 51. Several round steel parts 510 are welded to the adjustment nut 51 to facilitate operation.
[0032] The working principle of the lifting mechanism in the present invention is as follows: when the manhole cover needs to be removed from the manhole, the hook mechanism 4 is first hooked onto the lifting ear on the manhole cover 7, and then the operator rotates the adjusting nut 51 of the sliding position adjusting mechanism 5, and the adjusting screw 50 drives the sliding mechanism 3 to move in an oblique upward direction (that is, the manhole cover 7 moves in the direction away from the manhole 8). After moving a certain distance, the rotating arm 2 is rotated so that the manhole cover 7 and the manhole 8 are staggered, thereby making it convenient for maintenance personnel to enter and exit for maintenance. After the maintenance work is completed, when the manhole cover 7 needs to be installed back to the manhole 8, the rotating arm 2 is first rotated, and then the adjusting nut 51 is rotated in the opposite direction, so that the adjusting screw 50 drives the sliding mechanism 3 to move in an oblique downward direction (that is, the manhole cover 7 moves in the direction close to the manhole 8), thereby completing the installation of the manhole cover 7.
[0033] In summary, the present invention facilitates the lifting operation of the manhole cover by setting the lifting mechanism as a whole at an angle of 40° to 50° to the horizontal plane. The present invention provides a sliding position adjustment mechanism to enable the sliding mechanism to slide to any position between the first limit member and the second limit member, thereby making the opening and closing lifting operation of the manhole cover safe and reliable, greatly improving the safety performance.
[0034] The above embodiments are merely illustrative of the principles and effects of the present invention, as well as some embodiments of its application, and are not intended to limit the present invention. It should be noted that a person skilled in the art can make several modifications and improvements without departing from the inventive concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.
Claims
1. A lifting mechanism suitable for obliquely setting a manhole cover at an arc-shaped head, characterized by: include: Support, rotating arm, sliding mechanism, hook mechanism and sliding position adjustment mechanism, the support includes: a pad, a vertical bracket, an oblique bracket and a first support plate, the pad is welded to the arc head, the vertical bracket is welded to the pad, one of the free ends of the oblique bracket is welded to the vertical bracket, the other free end of the oblique bracket is welded to the first support plate, the rotating arm includes an I-shaped support beam, a second support plate provided at one free end of the I-shaped support beam and a mounting plate provided at the other free end of the I-shaped support beam, the second support plate of the rotating arm and the first support plate of the support are connected The sprocket wheel is connected to the control wheel of the driving member and the control wheel is connected with the control wheel of the driving member, and the control wheel is connected with the control wheel of the driving member. Adjusting nut, one of the free ends of the adjusting screw is fixedly connected to the sliding mechanism, and the other free end of the adjusting screw passes through the mounting plate and cooperates with the adjusting nut, the first supporting plate is welded with a first connecting plate and a second connecting plate, the second supporting plate is welded with a third connecting plate and a fourth connecting plate, the first connecting plate, the second connecting plate, the third connecting plate and the fourth connecting plate are connected by connecting studs and nuts so that a rotatable connection is formed between the first supporting plate and the second supporting plate, the hook mechanism includes: an upper screw, a lower screw and a spiral sleeve, the spiral sleeve includes an upper adjusting A nut, a lower adjusting nut and a connecting piece arranged between the upper adjusting nut and the lower adjusting nut, the connecting piece includes a first arc-shaped piece and a second arc-shaped piece, a first long groove and a second long groove are formed between the first arc-shaped piece and the second arc-shaped piece, the bottom of the upper screw is provided with a first pin groove, the top of the lower screw is provided with a second pin groove, the third cotter pin passes through the first long groove, the first pin groove and the second long groove in sequence and then forks to achieve the locking between the upper screw and the spiral sleeve, the fourth cotter pin passes through the first long groove, the second pin groove and the second long groove in sequence and then forks to achieve the locking between the lower screw and the spiral sleeve.
2. A hoisting mechanism suitable for obliquely installing a manhole cover at an arc-shaped head according to claim 1, characterized in that: The load-bearing stud is set as a stepped shaft with a width in the middle and narrow on both sides, one end of the load-bearing stud passes through the first end plate and is fixed by a first nut, and the other end of the load-bearing stud passes through the second end plate and is fixed by a second nut, and the axis center lines of the first wheel axle and the second wheel axle are located on the same straight line, and the first wheel axle and the second wheel axle are both set as a stepped shaft with a width in the middle and narrow on both sides, the first pulley is installed on the first wheel axle, one end of the first wheel axle passes through the first end plate and is fixed by a third nut, and the other end of the first wheel axle is positioned by a first cotter pin, and the second pulley is installed on the second wheel axle, one end of the second wheel axle passes through the second end plate and is positioned by a fourth nut, and the other end of the second wheel axle is positioned by a second cotter pin.
3. A hoisting mechanism suitable for obliquely installing a manhole cover at an arc-shaped head according to claim 1, characterized in that: The I-shaped support beam of the rotating arm is arranged at an angle of 40° to 50° to the horizontal plane.
4. A hoisting mechanism suitable for obliquely installing a manhole cover at an arc-shaped head according to claim 1, characterized in that: A connecting plate is provided between the first end plate and the second end plate of the sliding mechanism, and the free end of the adjusting screw is welded to the connecting plate.
5. The hoisting mechanism for obliquely installing a manhole cover at an arc-shaped head according to claim 1, characterized in that: A plurality of round steel pieces are welded on the adjusting nut.
6. A hoisting mechanism suitable for obliquely installing a manhole cover at an arc-shaped head according to claim 1, characterized in that: The vertical bracket and the oblique bracket of the support are both made of H-shaped steel.
7. The hoisting mechanism for obliquely installing a manhole cover at an arc-shaped head according to claim 1, characterized in that: The adjusting screw is arranged in parallel with the I-shaped support beam.
8. The hoisting mechanism for obliquely installing a manhole cover at an arc-shaped head according to claim 1, characterized in that: The first limiting member is arranged at the middle section of the I-shaped support beam, and the second limiting member is arranged at the free end of the I-shaped support beam. The first limiting member is a limiting plate, and the limiting plate is welded in the I-shaped support beam. The second limiting member is a limiting angle steel member, and the limiting angle steel member is fixed in the I-shaped support beam by bolts.