CN218708582U - Rotating arm type hoisting auxiliary mechanism for cold box expander - Google Patents

Abstract

The utility model discloses a rotating arm type hoisting auxiliary mechanism for a cold box expander, which comprises a rotating arm mechanism and a fixing mechanism, wherein the fixing mechanism is arranged on a cold box; the rotating arm mechanism comprises a suspension arm and a lifting hook; the suspension arm comprises a first end part, a connecting part and a second end part which are sequentially connected, the first end part is parallel to the side surface of the cold box and extends from top to bottom, and the first end part and the second end part form an included angle; the first end portion is axially and rotatably mounted on the fixing mechanism, the lifting hook is mounted on the second end portion, and the lifting hook is matched with an external lifting appliance to lift a component of the expansion machine. The utility model provides a rotating arm formula hoist and mount auxiliary mechanism for cold box expander can assist and realize simple and easy hoist and mount, dismantles the expander part on the hoist and mount cold box when making things convenient for the on-the-spot maintenance, and can reduce the hoist and mount cost.

Description

Rotating arm type hoisting auxiliary mechanism for cold box expander

Technical Field

The utility model belongs to the technical field of hoist and mount auxiliary mechanism, concretely relates to rotating arm formula hoist and mount auxiliary mechanism for cold box expander.

Background

The cold box is used as an important device in the air separation device, and the expander part needs to be disassembled and hoisted due to maintenance requirements. As the gas bearing turboexpander becomes larger and heavier, the weight thereof becomes heavier and more difficult to assemble and disassemble. When a user installs and removes the expander on site, when the weight of the expander core exceeds 50 kilograms, the direct installation and removal of the expander core by an operator is very difficult, and if the operator carelessly removes the expander core, industrial accidents can be caused. The bottom of a cooling box of the existing fractionating tower is mostly placed on a supporting leg higher than a basic plane or is provided with a very high bottom frame, so that the axial lead of the expansion machine is higher and higher from the basic plane, and an operator cannot directly disassemble and assemble expansion machine parts. Therefore, the expander components are currently lifted and maintained by a steam crane or a small electric crane.

The steam crane belongs to a special engineering vehicle, has high rent cost, cannot be used at any time, has certain risk during operation, and needs to be operated according to a hoisting principle. In addition, the steam crane is still influenced by the place, the premise of entering the place is that the road surface needs to be paved, the steam crane can run to a lifting point, the periphery is spacious, high-voltage wires, pipelines and the like cannot exist in the sky, the lifting and the rotation of the lifting arm need to be ensured to be free from obstacles, and the supporting legs can be conveniently extended out to be firmly supported. The small-sized electric crane needs to be assembled and positioned on site, needs to be firm on the ground and prevents the supporting legs from sinking as a steam crane does, and the swing crane is prevented from toppling. And the winch is driven to operate by electrifying, so that the early-stage preparation time is long, and the winch cannot be used at any time. The parts of the cold box expander need to be hoisted when being overhauled, and the hoisting machinery is inconvenient to enter the field due to the limited field condition of the cold box equipment, and the cost performance are not high.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned deficiencies of the prior art, in whole or in part, it is an object of the present invention to: the utility model provides a rotating arm formula hoist and mount complementary unit for cold box expander can assist and realize simple and easy hoist and mount, dismantles the expander part on the hoist and mount cold box when making things convenient for the on-the-spot maintenance, and can reduce the hoist and mount cost.

In order to realize the purpose of the utility model, the utility model provides a following technical scheme:

the utility model provides a rotating arm type hoisting auxiliary mechanism for a cold box expander, which comprises a rotating arm mechanism and a fixing mechanism, wherein the fixing mechanism is arranged on the cold box, and the rotating arm mechanism comprises a suspension arm and a lifting hook; the suspension arm comprises a first end part, a connecting part and a second end part which are sequentially connected, the first end part is parallel to the side surface of the cold box and extends along the direction from top to bottom, and an included angle is formed between the first end part and the second end part; the first end portion is axially and rotatably installed on the fixing mechanism, the lifting hook is installed on the second end portion, and the lifting hook is matched with an external lifting appliance to lift the expander. The expander may be mounted on the cold box below the hook.

The non-heavy equipment of expander, hoist and mount weight is not big, the utility model discloses the hoist and mount complementary unit that provides promptly with the hoisting point sets up in the cold box side, when satisfying the expander weight that required lifted by crane, can cooperate the hoist that the lifting hook is connected in order to realize the simple and easy hoist and mount of expander part dismantlement. Compared with a steam crane or a small electric crane, the provided small-sized hoisting auxiliary mechanism, namely the small-sized hoisting column, is more practical, has lower cost, small occupied space, simple and flexible operation, simple field maintenance and strong operability, can be used anytime and anywhere, and has low requirements on field hoisting environment.

The cold box is provided with a fixing mechanism, and the rotating arm mechanism is rotatably arranged on the fixing mechanism along the axial direction of the first end part. When hoisting is carried out, the first end part is rotated, so that the lifting hook of the second end part is positioned above the expander to be hoisted; when the hoisting is finished, the first end part is rotated to enable the second end part to be close to the cold box to avoid positions for other mechanisms; if a plurality of expanders which need to be hoisted exist, the first end part can be rotated to switch the hook on the second end part above other expanders to be hoisted so as to realize hoisting of the plurality of expanders.

The fixing mechanism comprises a first limiting plate, and the first limiting plate is fixedly arranged at the upright post of the cold box; the first limiting plate is provided with a first limiting hole, and the tail end of the first end part penetrates through the first limiting hole. The first end part of the suspension arm is rotatably arranged in the first limiting hole. The first limit hole is sized and shaped to match the first end of the boom, and in particular embodiments, the first limit hole has a diameter greater than the diameter of the first end and the diameters differ by 2-4mm for rotation of the first end.

The first end part is provided with a limiting flange, and the limiting flange is erected above a first limiting hole of the first limiting plate; and a gasket is arranged between the limiting flange and the first limiting plate. The limiting flange can prevent the first end part from continuously descending under the action of gravity to cause that a lifting point is too low to influence the lifting process. The gasket is used for reducing the friction damage between the limiting flange and the first limiting plate.

The fixing mechanism further comprises a second limiting plate positioned below the first limiting plate, and the second limiting plate is fixedly arranged at the upright post of the cold box; and a second limiting hole is formed in the second limiting plate, and the tail end of the first end part penetrates through the second limiting hole. The first end part of the suspension arm is rotatably arranged in the second limiting hole. The second limiting hole is used for further limiting the first end part of the suspension arm, so that the suspension arm is prevented from shaking greatly when being hoisted for use.

The cross sections of the first end part, the connecting part and the second end part are circular, and the first limiting hole and the second limiting hole are circular holes matched with the first end part; the limiting flange is an annular flange, and the gasket is an annular gasket.

The fixing mechanism further comprises a rib plate, one end of the rib plate is fixedly arranged on the first limiting plate, and the other end of the rib plate is fixedly arranged on the second limiting plate; the first limiting plate, the second limiting plate and the rib plate are made of carbon steel. The rib plate is used for strengthening the connection between the first limiting plate and the second limiting plate, and the stability of the installation of the suspension arm is improved.

The connecting part is a bent cylindrical section, and a supporting tube is connected between the first end part and the second end part; the connecting part, the first end part, the second end part and the supporting tube are made of carbon steel. The supporting tube is used for strengthening the connection between the first end and the second end, and the stability of the suspension arm is improved.

The included angle between the first end portion and the second end portion is 90 degrees, and the length of the first end portion and the length of the second end portion are both 0.8-1m. The lengths of the first end part and the second end part can be adjusted according to the position of the expansion machine, if the length of the second end part is too long, the operation of other parts outside the cold box can be interfered, and if the length is too short, the hoisting of the expansion machine can be influenced.

The davit is hollow tubular structure, the sealing member is all installed to first end and second end, the closure plate of sealing member for carbon steel material. In other embodiments, the suspension arm can also adopt a solid structure, and the hollow structure can reduce the cost and the bearing of the fixing mechanism. The hollow structure is easily affected by external moisture to be wetted, and the sealing of the first end portion terminal and the second end portion terminal by the sealing member can effectively reduce the wet rusting.

The lifting hook is a U-shaped lifting hook, and the U-shaped lifting hook is welded at the second end part in parallel; the lifting hook is made of carbon steel. The U-shaped lifting hook can balance stress, and is convenient for the installation and the lifting of an external lifting appliance; when the second end of the suspension arm is attached to the cold box, the U-shaped lifting hooks welded in parallel are also attached to the outer wall of the cold box, so that other mechanisms can be avoided conveniently.

Compared with the prior art, the utility model discloses following beneficial effect has at least:

1. the utility model discloses the hoist and mount complementary unit that provides promptly with the hoisting point sets up in the cold box side, can cooperate the hoist that the lifting hook is connected in order to realize the simple and easy hoist and mount that the expander part was dismantled. Compared with a steam crane or a small-sized electric crane, the electric hoisting machine is more practical, lower in cost, small in occupied space, simple and flexible to operate, simple to maintain on site, strong in operability, capable of being used anytime and anywhere, and low in requirement on environment for hoisting on site.

2. The cold box is provided with a fixing mechanism, and the rotating arm mechanism is rotatably arranged on the fixing mechanism along the axial direction of the first end part. When the hoisting is finished, the first end part is rotated to enable the second end part to be close to the cold box to avoid positions for other mechanisms; if a plurality of expanders which need to be hoisted exist, the first end part can be rotated to switch the hook on the second end part above other expanders to be hoisted so as to realize hoisting of the plurality of expanders.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings described below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic structural view of a cold box and a hoisting auxiliary mechanism in embodiment 1 (a column part is perspective);

FIG. 2 is an enlarged view of area A in FIG. 1 (with the column partially in perspective);

FIG. 3 is a schematic structural view of a hoisting assist mechanism in embodiment 1;

FIG. 4 is a side view of the hoist assist mechanism in embodiment 1;

fig. 5 is a schematic structural view of the hoisting auxiliary mechanism and the column in example 1 (the first end portion and the second end portion include partial sections).

Reference numerals: 1-a tumbler mechanism; 11-a boom; 12-a hook; 100-a base plane; 101-a first end portion; 102-a connecting portion; 103-a second end; 104-supporting tube; 105-a stop flange; 106-washer; 2-a fixing mechanism; 201-a first limiting plate; 202-a second limiting plate; 203-rib plate; 3-a cold box; 30-upright post; 31-cold box panels; 4. 4' -an expander; 5-sealing element.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The embodiment provides a rotating arm type hoisting auxiliary mechanism for a cold box expander, and with reference to fig. 1 and fig. 2, the mechanism comprises a rotating arm mechanism 1 and a fixing mechanism 2, and expanders 4 and 4' are installed on a cold box 3. The fixing mechanism 2 is installed on the cold box 3 and above the expansion machines 4 and 4', in this embodiment, the cold box 3 is a fractionating tower cold box, the cold box 3 is provided with two expansion machines 4 and 4', and the bottom of the cold box 3 is installed on the ground of the basic plane 100. The cold box 3 is composed of a plurality of (square steel) stand columns and (square steel) cross beams to form a cold box basic framework, the framework is welded with a cold box panel 31 on the outer side all around, the outer surface of the cold box 3 is enclosed by the cold box panel 31, and the stand columns and the cross beams are located on the inner side of the cold box panel 31, namely, the inner part of the cold box 3. The panel 31 of the refrigerator in this embodiment is a steel plate. The central surfaces of the two expansion machines 4 and 4' and the interior of the cold box 3 are provided with square steel upright posts 30, and the upright posts 30 are welded with an upper crossbeam and a lower crossbeam on a basic framework of the cold box. The two expanders 4 and 4' are symmetrically distributed on two sides of the square steel upright post 30 in the cold box 3. In this embodiment, the expanders 4 and 4' are gas bearing turbo expanders, the weight of the core (the sum of the weight of the body or the casing plus the weight of the front and rear sealing sleeves, the weight of the front and rear bearings and the rotor) exceeds 50kg, the weight of the core is less than 30% of the total weight of the expanders 4 and 4', and the outer diameter of the expansion wheel generally exceeds 120mm, so that a rotating arm hanger device (including the hoisting auxiliary mechanism and the external hanger provided in this embodiment) must be arranged on the cooling box panel 31 of the fractionating tower, and the rotating arm hanger device is positioned on the central plane of the same side face of the two expanders 4 and 4 '. In this embodiment, the horizontal axis height of the boom mechanism 1, i.e., the axis of the second end 103, is higher than the axes of the expanders 4 and 4 'by more than 1.5 m, which is convenient for overhauling and hoisting the expanders 4 and 4'. The installation height of the rotating arm mechanism 1 can be adjusted according to the size of the hoisting part expander.

With reference to fig. 3 in conjunction with fig. 1 and 2, the boom mechanism 1 comprises a boom 11 and a hook 12; referring to fig. 4, the suspension arm 11 includes a first end 101, a connecting portion 102 and a second end 103 connected in sequence, the first end 101 extends from top to bottom (extends to the end of the first end 101, i.e. the end facing the base plane 100 in this embodiment) parallel to the side of the cold box 3, and the first end 101 and the second end 103 are disposed at an included angle. The lengths of the first end part 101 and the second end part 103 are both 0.8-1m, and the lengths of the first end part 101 and the second end part 103 can be adjusted according to the position of the expander part to be lifted. In other embodiments, the length can be adjusted according to the distance between the two expanders 4, 4 'in the cold box 3, so that the lifting hook 12 is positioned right above the expander 4 or 4' during lifting. In this embodiment, optionally, the included angle between the first end portion 101 and the second end portion 103 is 90 degrees. The first end portion 101 and the second end portion 103 are both straight line segments, the connecting portion 102 is a curved cylindrical segment, and a support tube 104 is connected between the first end portion 101 and the second end portion 103. Referring to fig. 5, the first end portion 101, the connecting portion 102, the second end portion 103, and the support tube 104 are all hollow tubular structures, the sealing members 5 are mounted at the ends of the first end portion 101 and the second end portion 103, and the sealing members 5 are made of carbon steel. The first end 101, the connecting portion 102, the second end 103, and the support tube 104 are made of carbon steel. The first end 101, the connecting portion 102, the second end 103, and the support tube 104 may be integrally provided. The first end 101, the connection 102 and the second end 103 of the boom 11 are all circular in cross-section. In other embodiments, the boom 11 may be a solid round bar structure, and the material may be other steel for machine manufacturing.

Referring to fig. 3 in combination with fig. 1 and 2, the fixing mechanism 2 includes a first limiting plate 201 and a second limiting plate 202 located below the first limiting plate 201, and the first limiting plate 201 and the second limiting plate 202 are sequentially welded to the cold box panel 31 from top to bottom and located at the cold box panel 31 corresponding to the upright 30 inside the cold box 3. First limiting plate 201 and second limiting plate 202 are installed on cold box panel 31, correspond cold box 3 inside be equipped with cold box foundation framework on two upper and lower crossbeam welded stand 30, cold box panel 31 is thinner, plays the reinforcing effect through stand 30. Other conventional fastening arrangements may be used in other embodiments. The first stopper plate 201 and the second stopper plate 202 are made of carbon steel, and in other embodiments, may be made of other steel for machine manufacturing. The first limiting plate 201 is provided with a first limiting hole, the second limiting plate 202 is provided with a second limiting hole, and the tail end of the first end 101 of the suspension arm 11 penetrates through the first limiting hole and the second limiting hole and is rotatably mounted in the first limiting hole and the second limiting hole respectively. I.e. the first end 101 of the boom 11 is mounted rotatably in the axial direction on the fixing mechanism 2. The first limiting hole and the second limiting hole are circular holes matched with the first end portion 101 of the suspension arm 11.

Referring to fig. 5, the first end 101 of the boom 11 is provided with a limit flange 105, and the limit flange 105 is erected above the first limit hole of the first limit plate 201; a washer 106 (not shown in fig. 3 and 4, see fig. 5) is provided between the retainer flange 105 and the first retainer plate 201. In this embodiment, the stop flange 105 is an annular flange and the gasket 106 is an annular gasket. The fixing mechanism 2 further comprises a rib plate 203, one end of the rib plate 203 is welded on the first limiting plate 201, the other end of the rib plate 203 is welded on the second limiting plate 202, and other conventional fixing and mounting modes can be adopted in other embodiments; the rib plate 203 is made of carbon steel. A hook 12 is mounted on the second end 103 of the boom 11 above the part to be lifted of the expander 4, 4', the hook 12 mating with an external spreader to lift the parts of the expander 4, 4'. In this embodiment, the hook 12 is a U-shaped hook, and the U-shaped hook is welded to the second end 103 of the boom 11 in parallel, and other conventional fixing and mounting manners may be adopted in other embodiments; the lifting hook 12 is made of carbon steel. When the lifting device is not used, the lifting arm 11 rotates to be tightly attached to the outer wall of the cold box 3, when the lifting device is used, the lifting arm 11 rotates to a position above the expander of the part to be lifted, and the lifting point is located right above the expander of the part to be lifted.

Use the rotating arm formula hoist and mount auxiliary mechanism for the cold box expander that this embodiment provided as an example, introduce the utility model discloses an operating method: when the expanders 4 and 4' need to be hoisted, the suspension arm 11 is rotated to enable the lifting hook 12 to be positioned right above the expander 4, and an external lifting appliance is matched to disassemble and hoist the expander 4; after the hoisting of the expander 4 parts is completed, the suspension arm 11 is rotated to enable the lifting hook 12 to be positioned right above the expander 4', and the expander 4' parts are dismounted and hoisted by matching with an external hoisting tool; after the hoisting is completed, the boom 11 is rotated to make the second end 103 closely contact with the outer wall of the cold box 3, so as to avoid interference with other parts or mechanisms outside the cold box 3.

The above description of the embodiments is only intended to facilitate the understanding of the method and the core idea of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the scope of the appended claims.

Claims (10)

1. A rotating arm type hoisting auxiliary mechanism for a cold box expander is characterized by comprising a rotating arm mechanism (1) and a fixing mechanism (2), wherein the fixing mechanism (2) is arranged on a cold box (3); the rotating arm mechanism (1) comprises a suspension arm (11) and a lifting hook (12); the suspension arm (11) comprises a first end part (101), a connecting part (102) and a second end part (103) which are sequentially connected, the first end part (101) is parallel to the side surface of the cold box (3) and extends from top to bottom, and the first end part (101) and the second end part (103) are arranged at an included angle; the first end portion (101) is axially and rotatably mounted on the fixing mechanism (2), the hook (12) is mounted on the second end portion (103), and the hook (12) is matched with an external lifting appliance to lift a part of the expander.

2. The swing arm type hoisting auxiliary mechanism for the cold box expander is characterized in that the fixing mechanism (2) comprises a first limiting plate (201), and the first limiting plate (201) is fixedly installed at a vertical column (30) of the cold box (3); a first limiting hole is formed in the first limiting plate (201), and the tail end of the first end portion (101) penetrates through the first limiting hole.

3. The swing arm type hoisting auxiliary mechanism for the cold box expander as claimed in claim 2, wherein the first end portion (101) is provided with a limit flange (105), and the limit flange (105) is erected above a first limit hole of the first limit plate (201); and a gasket (106) is arranged between the limiting flange (105) and the first limiting plate (201).

4. The swing arm type hoisting auxiliary mechanism for the cold box expander according to claim 3, wherein the fixing mechanism (2) further comprises a second limiting plate (202) below the first limiting plate (201), and the second limiting plate (202) is fixedly installed at the upright (30) of the cold box (3); a second limiting hole is formed in the second limiting plate (202), and the tail end of the first end portion (101) penetrates through the second limiting hole.

5. The swing-arm auxiliary hoisting mechanism for the cold box expander according to claim 4, wherein the cross section of the first end portion (101), the cross section of the connecting portion (102) and the cross section of the second end portion (103) are circular, and the cross section of the first limiting hole and the cross section of the second limiting hole are circular holes matched with the first end portion (101); the limiting flange (105) is an annular flange, and the gasket (106) is an annular gasket.

6. The swing arm type hoisting auxiliary mechanism for the cold box expander according to claim 4, wherein the fixing mechanism (2) further comprises a rib plate (203), one end of the rib plate (203) is fixedly installed on the first limiting plate (201), and the other end of the rib plate (203) is fixedly installed on the second limiting plate (202); the first limiting plate (201), the second limiting plate (202) and the rib plate (203) are made of carbon steel.

7. The swing arm type hoisting auxiliary mechanism for the cold box expander is characterized in that the connecting part (102) is a bent cylindrical section, and a supporting pipe (104) is connected between the first end part (101) and the second end part (103); the connecting part (102), the first end part (101), the second end part (103) and the supporting pipe (104) are made of carbon steel.

8. The swing arm type hoisting auxiliary mechanism for the cold box expander according to claim 1, wherein the included angle between the first end portion (101) and the second end portion (103) is 90 degrees, and the length of each of the first end portion (101) and the second end portion (103) is 0.8-1m.

9. The swing arm type hoisting auxiliary mechanism for the cold box expander is characterized in that the boom (11) is a hollow tubular structure, the sealing members (5) are mounted at the tail ends of the first end part (101) and the second end part (103), and the sealing members (5) are made of carbon steel.

10. The swing-arm auxiliary hoisting mechanism for the cold box expander as claimed in claim 1, wherein the hook (12) is a U-shaped hook welded in parallel to the second end portion (103); the lifting hook (12) is made of carbon steel.

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