CN220886664U - Lifting appliance - Google Patents

Abstract

The utility model relates to the technical field of steam turbine maintenance, in particular to a lifting appliance. The lifting appliance is used for disassembling and assembling a steam inlet assembly at the top of the low-pressure cylinder and comprises a crane, a connecting rod, a main beam, a plurality of lifting screw rods and an adjusting assembly, wherein one end of the connecting rod is connected with a lifting hook of the crane; the top of the main beam is connected with the other end of the connecting rod; the hoisting screw rod is arranged at the bottom of the main beam and can be connected with the steam inlet component; one end of the adjusting component is connected with the main beam, the other end of the adjusting component is connected with the steam inlet component, and the adjusting component is used for adjusting the balance of the steam inlet component. Through setting up a plurality of hoist and mount lead screws and being connected with the steam inlet subassembly, realize the multiple spot and lift by crane to make the steam inlet subassembly keep balanced through adjusting component, can with the whole hoist and mount of steam inlet subassembly transfer to maintenance platform.

Description

Lifting appliance

Technical Field

The utility model relates to the technical field of steam turbine maintenance, in particular to a lifting appliance.

Background

The steam turbine is a rotary machine which converts the heat energy of steam into mechanical energy and drives a generator rotor to generate electricity through high-speed rotation. According to the difference of steam parameters, the steam turbine is divided into a high-pressure cylinder and a low-pressure cylinder. In order to ensure that the running states, dynamic and static gaps and the like of all parts of the steam turbine meet the running requirements, all cylinders of the steam turbine are required to be disassembled and overhauled regularly.

The low-pressure cylinder of the AP1000 nuclear turbine is designed to be of a top two-side steam inlet structure. Steam in the high-pressure cylinder enters the steam-water separation reheater after doing work, and enters the low-pressure cylinder through a steam valve and a pipeline at the top of the low-pressure cylinder after steam-water separation and reheating. The steam inlet assembly at the top of the single low-pressure cylinder comprises 2 reheating main steam valves, 2 reheating steam valves, 2 connecting pipelines and 1 piece of 3-way pipe. When the low-pressure cylinder is disassembled and overhauled in the prior art, the conventional hoisting equipment cannot ensure the balance of the steam inlet assembly in the hoisting process due to overlarge volume and overlong length of the steam inlet assembly, and the steam inlet assembly is easy to damage.

Therefore, a lifting appliance is needed to solve the above technical problems.

Disclosure of utility model

The utility model aims to provide a lifting appliance which can integrally lift and transfer a steam inlet assembly to an overhaul platform.

To achieve the purpose, the utility model adopts the following technical scheme:

The utility model provides a hoist, the hoist is used for dismouting low pressure jar top advance vapour subassembly, advance vapour subassembly and include four steam valves, a tee bend pipeline and two connecting tube, four the steam valve with two connecting tube is followed the central axis of tee bend pipeline is the center pin symmetry set up in the both sides of tee bend pipeline, the interface of tee bend pipeline one end the steam valve connecting tube with the steam valve connects gradually, the hoist includes:

A crane;

one end of the connecting rod is connected with the lifting hook of the crane;

the top of the main beam is connected with the other end of the connecting rod;

the hoisting screw rods are arranged at the bottom of the main beam and can be connected with the steam inlet component;

The adjusting component is characterized in that one end of the adjusting component is connected with the main beam, the other end of the adjusting component is connected with the steam inlet component, and the adjusting component is used for adjusting the balance of the steam inlet component.

As a preferable technical scheme of the lifting appliance, the adjusting assembly comprises a plurality of chain blocks, hanging points are arranged on the side walls of the main beams, one ends of the chain blocks are connected with the hanging points, and the other ends of the chain blocks are connected with the steam valves.

As a preferable technical scheme of the lifting appliance, the adjusting assembly further comprises a safety hoop, the safety hoop is arranged on the steam valve, and the other end of the chain block is connected with the safety hoop.

As a preferable technical scheme of the lifting appliance, the adjusting assembly further comprises an annular gasket, and the annular gasket is arranged between the safety hoop and the steam valve.

As a preferable technical scheme of the lifting appliance, the lifting appliance further comprises a saddle, and the saddle is connected with the steam valve.

As a preferable technical scheme of the lifting appliance, a through hole is formed in the top of the saddle, and the lifting screw rod can penetrate through the through hole and is in threaded connection with the saddle.

As a preferable technical scheme of the lifting appliance, a first positioning hole is formed in the top of the three-way pipeline, a second positioning hole is formed in the bottom of the main beam, and the first positioning hole and the second positioning hole can be located on the same axis.

As a preferable technical scheme of the lifting appliance, the lifting appliance further comprises a positioning piece, one end of the positioning piece is connected with the three-way pipeline through the first positioning hole, and the other end of the positioning piece is connected with the main girder through the second positioning hole.

As a preferable technical scheme of the lifting appliance, the main beam is a box-type lifting beam.

As a preferable technical scheme of the lifting appliance, the main beam is made of steel.

The utility model has the beneficial effects that: the lifting appliance provided by the utility model is used for disassembling and assembling the steam inlet component at the top of the low-pressure cylinder, and comprises a crane, a connecting rod, a main beam, a plurality of lifting screw rods and an adjusting component, wherein one end of the connecting rod is connected with a lifting hook of the crane; the top of the main beam is connected with the other end of the connecting rod; the hoisting screw rod is arranged at the bottom of the main beam and can be connected with the steam inlet component; one end of the adjusting component is connected with the main beam, the other end of the adjusting component is connected with the steam inlet component, and the adjusting component is used for adjusting the balance of the steam inlet component. Through setting up a plurality of hoist and mount lead screws and being connected with the steam inlet subassembly, realize the multiple spot and lift by crane to make the steam inlet subassembly keep balanced through adjusting component, can with the whole hoist and mount of steam inlet subassembly transfer to maintenance platform.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following description will briefly explain the drawings needed in the description of the embodiments of the present utility model, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the contents of the embodiments of the present utility model and these drawings without inventive effort for those skilled in the art.

Fig. 1 is a front view of a spreader provided by an embodiment of the present utility model;

Fig. 2 is a side view of a spreader according to an embodiment of the present utility model.

In the figure:

1. A crane; 2. a connecting rod; 3. a main beam; 31. hanging points; 32. a second positioning hole; 4. hoisting a screw rod; 5. chain block; 6. a steam valve; 61. an actuator; 7. a safety hoop; 8. a saddle; 9. a three-way pipe; 91. a first positioning hole; 10. and connecting pipelines.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are orientation or positional relationships based on those shown in the drawings, merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

As shown in fig. 1 to 2, the utility model provides a lifting appliance, which is used for dismounting an air inlet component at the top of a low-pressure cylinder, wherein the air inlet component comprises four steam valves 6, a three-way pipeline 9 and two connecting pipelines 10, the four steam valves 6 and the two connecting pipelines 10 are symmetrically arranged at two sides of the three-way pipeline 9 along the central axis of the three-way pipeline 9 in a central axis mode, an interface at one end of the three-way pipeline 9, the steam valves 6, the connecting pipelines 10 and the steam valves 6 are sequentially connected, the steam valves 6 are provided with lifting holes and an actuating mechanism, and the top of the three-way pipeline 9 is provided with a first positioning hole 91.

Specifically, as shown in fig. 1 and 2, the lifting appliance comprises a crane 1, a connecting rod 2, a main beam 3, a plurality of lifting screw rods 4 and an adjusting assembly.

Specifically, referring to fig. 1, one end of a connecting rod 2 is connected to a hook of a crane 1; the top of the main beam 3 is connected with the other end of the connecting rod 2; the lifting screw rod 4 is arranged at the bottom of the main beam 3, and the lifting screw rod 4 can be connected with the steam inlet component; the lifting screw rod 4 can be connected with a steam valve 6; one end of the adjusting component is connected with the main beam 3, the other end of the adjusting component is connected with the steam inlet component, and the adjusting component is used for adjusting the balance of the steam inlet component. Through setting up a plurality of hoist and mount lead screws 4 and being connected with steam valve 6, realize the multiple spot and lift by crane to make the steam inlet subassembly keep balanced through adjusting part, can with the whole hoist and mount of steam inlet subassembly transfer to maintenance platform, the maintenance of conveniently dismantling reduces hoist and mount operation and high altitude construction.

Further, the main beam 3 is a box-type hanging beam, the connecting rod 2, the hoisting screw rods 4 and the adjusting component are convenient to set, the main beam 3 is formed by welding Q355B steel plates, and the strength requirement of the main beam 3 can be met. Specifically, in this embodiment, the top of four steam valves 6 all sets up the lifting hole, and this hoist sets up four hoist and mount lead screw 4, and four hoist and mount lead screw 4 set up with the lifting hole one-to-one at four steam valve 6 tops, realize multiple spot hoist and mount, can realize the integral hoisting to the steam inlet subassembly.

Still further, the lifting appliance also comprises a saddle 8, and the saddle 8 is connected with the steam valve 6 through a lifting hole of the steam valve 6. Specifically, in the embodiment, the four steam valves 6 are all provided with saddles 8, and the saddles 8 are fixedly connected with the steam valves 6 through lifting holes at the tops of the steam valves 6 by bolts; the saddle 8 top is provided with the through-hole, and saddle 8's lateral wall has the opening, and hoist and mount lead screw 4 can pass the through-hole, and the staff passes through the opening of saddle 8 lateral wall with nut and hoist and mount lead screw 4 threaded connection, realizes hoist and mount lead screw 4 and saddle 8 threaded connection, and the external diameter of nut is greater than the diameter of through-hole, can prevent that the nut from sliding out the through-hole, avoids hoist and mount ineffectively.

Further, a first positioning hole 91 is formed in the top of the three-way pipeline 9, a second positioning hole 32 is formed in the bottom of the main beam 3, and the first positioning hole 91 and the second positioning hole 32 can be located on the same axis. The first positioning hole 91 and the second positioning hole 32 are arranged on the same axis, so that the lifting screw rod 4 can be aligned with the through hole, and the lifting screw rod 4 is convenient to connect with the saddle 8; meanwhile, the first positioning hole 91 and the second positioning hole 32 can also be used as lifting holes, when only the three-way pipeline 9 is required to be lifted, as the saddle 8 is not arranged on the three-way pipeline 9 and the corresponding lifting screw 4 is not arranged on the lifting appliance, a worker can utilize a steel cable to penetrate through the first positioning hole 91 and the second positioning hole 32 to connect the main beam 3 with the three-way pipeline 9, and the three-way pipeline 9 can be lifted independently.

Still further, the hoist still includes the setting element, and the one end of setting element is connected with three-way pipe 9 through first locating hole 91, and the other end of setting element is connected with girder 3 through second locating hole 32. Because the staff is working aloft to at the connection hoist and mount lead screw 4 and saddle 8 in-process, the staff is at the operation in-process, and girder 3 can take place to rock because of unsettled, can produce danger to the staff, consequently through setting up the setting element, with the fixed in position of tee bend pipeline 9 and girder 3, prevent that girder 3 from rocking, hoist and mount lead screw 4 is also fixed with the position of through-hole simultaneously, conveniently connects hoist and mount lead screw 4 and saddle 8, improves hoisting efficiency.

Further, as shown in fig. 1 and 2, the adjusting assembly includes a plurality of chain blocks 5, the side wall of the main beam 3 has a hanging point 31, one end of the chain block 5 is connected with the hanging point 31, the steam valve 6 has an executing mechanism 61, and the other end of the chain block 5 is connected with the executing mechanism 61. Because the single side of the steam valve 6 is provided with the actuating mechanism 61, the weights of the two sides of the steam valve 6 are different, so that the balance of the steam inlet assembly is difficult to keep in the hoisting process, and the balance of the steam inlet assembly can be adjusted by arranging the chain block 5. Specifically, in this embodiment, set up four hanging points 31 on the lateral wall of girder 3, four hanging points 31 are symmetrical distribution with the axis of girder 3, and the one end and the hanging point 31 of chain block 5 are connected, and the other end and the actuating mechanism 61 of chain block 5 are connected, and like this, chain block 5 can produce the pulling force to actuating mechanism 61, makes the high maintenance balance of steam inlet subassembly both ends, conveniently installs and dismantle the steam inlet subassembly.

Still further, the adjusting part still includes safe staple bolt 7, and safe staple bolt 7 sets up in actuating mechanism 61, and the other end and the safe staple bolt 7 of chain block 5 are connected. Since the actuator 61 includes the oil motor and the working parts, the actuator 61 is protected with emphasis, so the safety hoop 7 is arranged on the outer side of the actuator 61 to increase the stress area of the actuator 61, and the safety hoop 7 is detachable without arranging the hanging point 31 of the chain block 5 on the actuator 61 to maintain the integrity of the actuator 61 and prevent the actuator 61 from being damaged.

Further, the adjusting component further comprises an annular gasket, the annular gasket is arranged between the safety hoop 7 and the steam valve 6, the annular gasket can buffer and damp the steam valve 6, the annular gasket is used for protecting the steam valve 6 in the hoisting process and preventing the steam valve 6 from being damaged, and the annular gasket can be made of rubber or plastics.

The lifting appliance provided by the utility model can realize the integral lifting of the steam inlet component, thereby reducing lifting operation and overhead operation. The specific operation process is as follows:

1. Four saddles 8 are respectively installed on the hoisting holes at the tops of the four steam valves 6, and are fastened by bolts.

2. Safety hoops 7 are respectively arranged at corresponding positions of the actuating mechanisms 61 at the bottoms of the four steam valves 6.

3. The crane 1 is hooked in place above the main beam 3 and the two side links 2 are hung on the crane 1 hook by rotation.

4. The upper ends of the four hand hoist 5 are hung on the hanging points 31 on the main beam 3.

5. And (3) operating the crane 1, lifting the lifting hook and the lifting beam assembly of the crane 1, and stopping the crane until the crane is operated above the steam inlet assembly.

6. The position of the lifting hook of the crane 1 is finely adjusted, the second positioning hole 32 at the bottom of the main beam 3 is aligned with the first positioning hole 91 at the top of the three-way pipeline 9 through steel ruler comparison, the main beam 3 and the three-way pipeline 9 are fixed by installing positioning pieces, and the four lifting screw rods 4 are aligned with through holes at the top of the saddle 8 respectively.

7. And connecting the four hoisting screw rods 4 with the saddle 8, and fastening nuts at the bottoms of the hoisting screw rods 4.

8. The bottoms of the four chain blocks 5 are respectively connected with a safety hoop 7, and the chain blocks 5 are operated and tensioned.

9. And operating the crane 1 to slightly lift the lifting hook of the crane 1, and adjusting the chain block 5 according to the gravity center change condition of the steam inlet assembly until balance is achieved.

10. Lifting the hook of the crane 1 and lifting the steam inlet assembly to the overhauling or mounting position.

11. After the steam inlet assembly is placed to a supporting or mounting position to confirm stability, the bottom of the chain block 5 is detached from the safety hoop 7.

12. And loosening nuts at the bottom of the lifting screw rod 4, and disconnecting the lifting screw rod 4 from the saddle 8.

13. And (3) operating the crane 1 to hoist the hanging beam assembly to the corresponding position.

14. The connecting rod 2 is rotated and detached from the hook of the crane 1.

15. The saddle 8 is removed.

Furthermore, the foregoing description of the preferred embodiments and the principles of the utility model is provided herein. It will be understood by those skilled in the art that the present utility model is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the utility model. Therefore, while the utility model has been described in connection with the above embodiments, the utility model is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the utility model, which is set forth in the following claims.

Claims (10)

1. The hoist, the hoist is used for the steam admission subassembly at dismouting low pressure jar top, the steam admission subassembly includes four steam valves (6), a three-way pipeline (9) and two connecting tube (10), four steam valves (6) and two connecting tube (10) are along the central axis of three-way pipeline (9) be the center pin symmetry set up in the both sides of three-way pipeline (9), the interface of three-way pipeline (9) one end steam valve (6) connecting tube (10) with steam valve (6) connect gradually, its characterized in that, the hoist includes:

a crane (1);

One end of the connecting rod (2) is connected with a lifting hook of the crane (1);

The top of the main beam (3) is connected with the other end of the connecting rod (2);

The hoisting screw rods (4) are arranged at the bottoms of the main beams (3), and the hoisting screw rods (4) can be connected with the steam inlet assembly;

The adjusting component is characterized in that one end of the adjusting component is connected with the main beam (3), the other end of the adjusting component is connected with the steam inlet component, and the adjusting component is used for adjusting the balance of the steam inlet component.

2. The lifting appliance according to claim 1, wherein the adjusting assembly comprises a plurality of chain blocks (5), the side wall of the main beam (3) is provided with hanging points (31), one end of the chain block (5) is connected with the hanging points (31), and the other end of the chain block (5) is connected with the steam valve (6).

3. The lifting appliance according to claim 2, wherein the adjusting assembly further comprises a safety hoop (7), the safety hoop (7) is arranged on the steam valve (6), and the other end of the chain block (5) is connected with the safety hoop (7).

4. A lifting appliance according to claim 3, wherein the adjustment assembly further comprises an annular spacer arranged between the safety collar (7) and the steam valve (6).

5. A lifting appliance according to claim 2, characterized in that the lifting appliance further comprises a saddle (8), which saddle (8) is connected with the steam valve (6).

6. The lifting appliance according to claim 5, characterized in that the saddle (8) is provided with a through hole at the top, through which the lifting screw (4) can be threaded with the saddle (8).

7. The lifting appliance according to claim 1, characterized in that a first positioning hole (91) is formed in the top of the three-way pipeline (9), a second positioning hole (32) is formed in the bottom of the main beam (3), and the first positioning hole (91) and the second positioning hole (32) can be located on the same axis.

8. The lifting appliance according to claim 7, further comprising a positioning member, one end of which is connected to the three-way pipe (9) through the first positioning hole (91), and the other end of which is connected to the main girder (3) through the second positioning hole (32).

9. The spreader according to any one of claims 1-8, characterized in that the main beams (3) are box-type hanging beams.

10. The spreader of claim 9, wherein the main beams (3) are steel.