KR20130008234A - Hydraulic lifting apparatus for disassembling and assembling valve bonnet - Google Patents

Abstract

PURPOSE: A lifting device for assembling and disassembling a valve bonnet is provided to extend the life of mechanical parts as the stroke of a link chain can be minutely controlled by a screw type. CONSTITUTION: A lifting device for assembling and disassembling a valve bonnet comprises an eye bolt(10), a mounting block(20), lugs(20'), link chains(40), shackles(50), and control bolts(50'). The eye bolt lifts or moves heavy objects having a ring in the head thereof with a crane. The mounting block is thread-coupled to the eye bolt and master links(30) are mounted thereof. The lugs are installed in rings at the bottom of the mounting block and select chains. The link chains are coupled to the master links. The shackles are coupled to the bottommost chain of the link chains. The control blots are coupled to the shackles to minutely control the moving stroke of the link chains.

Description

Lifting Equipment for Disassembling and Assembling the Valve Bonnet {Hydraulic Lifting Apparatus for Disassembling and Assembling Valve Bonnet}

The present invention relates to a lifting equipment for disassembling and repairing bonnets of valves such as safety valves and pressure relief valves in a power plant. The lifting chain for disassembly and assembly of the valve bonnet is related to the design of the link chain with three hooks or four hooks for easy centering, and the movement stroke is screwed for fine adjustment.

In general, power plants convert thermal or mechanical energy into electrical energy. Therefore, in order to generate electricity, it is necessary to consume a corresponding amount of energy. The source of energy for such generation is called a power generation resource or a power resource. Generators currently used for power generation use almost electromagnetic induction to convert mechanical power into electric power. Therefore, all energy flow is converted into mechanical power to generate electric power. There are batteries that convert chemical energy directly into electrical energy, or thermocouples that convert thermal energy directly into electrical energy. However, batteries are not used for large-scale power generation, and the use of thermocouples for power generation is still in the experimental stage. The power generation method and the power plant also vary according to what is used as the power generation resource. There are hydroelectric power plants, thermal power plants, nuclear power plants, tidal power plants, wind power plants, and geothermal power plants.

On the other hand, power plants are equipped with high and low pressure heat exchangers, tanks, main valves (safety valves, pressure relief valves, etc.), small manual valves used for draining or exhausting pipes, measurement control equipment, and electrical equipment. In addition, the facilities are subjected to maintenance and inspection during the maintenance period of the power plant.

Among these facilities, safety valves or pressure relief valves are lifted and inspected by hydraulic lifting devices.

As a conventional chain block, a separator frame lifting device for wastewater and wastewater disclosed in Korean Utility Model Publication No. 20-0293177 as shown in FIG. 1 is known.

According to the configuration, a separator frame lifting device in which a separator frame reciprocating in accordance with a guide rail installed in the aeration tank is inserted into and taken out of the aeration tank, and positioned on an upper surface of the membrane frame to reciprocate along the guide rail. A lifting roller having a guide roller which is rotated at each corner of the upper and lower portions and a plurality of channels having a “c” shape in a rectangular shape to be in contact with the upper surface of the separator frame, and an upper portion of the lifting frame The hook plate which is connected to the chain block and connected to the lifting frame and a plurality of chains and reciprocates up and down like the lifting frame according to the operation of the chain block, and is coupled to each of the two sides in the lifting frame to be rotated Upper surface of the separator frame to lift the frame It is a lifting device composed of a lifting hook part, as well as hanging on the hook portion coupled to both sides.

In Fig. 1, parts not related to the present invention will not be unnecessarily described so as not to obscure the gist of the present invention. 1, the chain 4 is coupled to the eye bolt 5, one end of the tension chain 33 is connected to a pair of lifting rings 32, and the other end of each tension chain 33 is outside the aeration tank. The locking portion (not shown) of the structure is connected. Therefore, blockchains are structured not to interfere with each other.

However, in order to meet the center of gravity during the overhaul of safety valves and pressure relief valves, which are the main valves of power plants, many chain blocks are installed on one crane hook to lift heavy loads. Interference with the chain block may cause parts damage and safety accidents, and requires the replacement of a simple and finely adjustable crane block that guarantees safety and disassembly and assembly of mechanical parts consisting of a bonnet of a large valve or a combination of a piston and a cylinder The mutual tolerances cause damage to the component surface.

In addition, when the heavy object is to be lifted in the field, the chain block is generally used, but there is a problem in disassembling and assembling the parts because it is not easy to adjust the center of gravity because there is a limit in the movement amount, that is, the stroke.

Korean Utility Model Registration Publication No. 20-0293177

The present invention has been made in the above-mentioned background, three hooks or four link chains to overcome the limitation of the movement amount of the chain block in the disassembly inspection of the safety valve and the pressure relief valve of the power plant and to facilitate fine adjustment and centering Its purpose is to provide a lifting device for disassembling and assembly of the valve bonnet, which is designed with hooks and allows for fine adjustment by means of screw stroke.

Lifting equipment for disassembling the valve bonnet according to an embodiment of the present invention for achieving the above object, as lifting equipment for disassembling the bonnet of the valve, such as safety valve and pressure relief valve of the power plant,

Eye bolts (Eye Bolt; 10) as a hanging tool for lifting or moving large heavy objects such as mechanical equipment mainly with a hook on the head;

A mounting block 20 that is combined with the eye bolt 10 and to which a master link 30 is mounted;

A lug 20 'installed at a lower end of the mounting block 20 to select a chain;

A link chain (40) coupled to the master link (30) and used for power transmission by hooking on a ring such as a sprocket wheel to lift heavy materials such as safety valves and pressure relief valves;

Shackle (50) coupled to the chain at the bottom of the link chain (40) for hanging heavy items such as the safety valve and the pressure relief valve; And

The lifting device for disassembling and disassembling the valve bonnet is characterized by including an adjusting bolt (50 ') coupled to the shackle (50) for fine adjustment of the movement stroke of the link chain (40).

According to the present invention, it is possible to finely adjust the moving stroke of the link chain by screwing, so that the life of the machine parts and the required materials can be reduced, and the unit work becomes easy and can be quickly and accurately.

1 is a view showing a chain block of the prior art.
Figure 2 shows a front view of the lifting equipment for disassembling the valve bonnet of the present invention.

With reference to the drawings will be described in detail the lifting device for disassembling the valve bonnet according to an embodiment of the present invention.

Figure 2 shows a front view of the lifting equipment for disassembling the valve bonnet of the present invention.

As shown in the drawing, the lifting equipment of the present invention is an eye bolt (Eye Bolt) as a hanging tool used to lift or move a large weight, such as a mechanical equipment mainly with a ring on the head, the head portion is a ring-shaped head with a crane. 10), the mounting block (20), which is combined with the eye bolt (10) and the master link (Master Link; 30) is mounted, is installed in the lower ring of the mounting block (20) and the link chain (40) Lug (20 ') for selection, the link chain is coupled to the master link (30) and used for power transmission by hooking on a hook such as a sprocket wheel to lift heavy objects such as safety valves and pressure relief valves ( Link chain (40), Shackle (50) coupled to the chain at the bottom of the link chain 40 and hanging the heavy goods such as the safety valve and pressure relief valve (Shackle; 50) and coupled to the shackle (50) the link chain ( Movement of 40) It includes; (50 'Adjusting Bolt) adjusting bolt for defining fine adjustment.

FIG. 2B shows a cross-sectional view of part A of FIG. 2A.

The adjustment bolt 50 'is provided with an end plate 70 at the end of the bolt in order to prevent the complete loosening so as not to be released beyond the predetermined stroke beyond the safety of the bolt. That is, when the adjusting bolt 50 'is loosened by the end plate 70, the end plate 70 is caught by the step 120a so that the adjusting bolt 50' is no longer released. In addition, a lock nut 60 is installed to prevent the stroke of the adjustment bolt from being set after setting the adjustment bolt 50 '. In addition, the adjusting nut 120 screwed to the adjusting bolt 50 'facilitates rotation of the adjusting bolt 50' and prevents axial movement by assembling a ball bearing 100 and a thrust bearing 110. Do it. The bearing housing 80 surrounds the ball bearing 100 and the thrust bearing 110. Fixing bolts 130 are installed on both side surfaces of the lower end of the adjusting nut 50 to fix the adjusting nut 120 and the bearing housing 110. The swivel lug 90 is a protrusion installed at the bottom of the end plate 70 and coupled to the shackle 50.

2C shows a plan view of the ball bearing.

The length adjusting stroke of the adjusting bolt 50 'is 50 mm, and the link chain length is 700 mm, but is not necessarily limited thereto and may vary according to embodiments. As shown in the plan view of the mounting block 10 of Fig. 1 (d), the link chain 40 is installed at intervals of 120 ° when three are mounted, and two and diagonal at 60 ° intervals when four are installed. Two can be installed in the direction. There are six hooks on which the link chain can be hooked at 60 ° intervals in the circumferential direction.

According to the present invention, it is possible to finely adjust the moving stroke of the link chain by screwing, so that the life of the machine parts and the required materials can be reduced, and the unit work becomes easy and can be quickly and accurately.

The present invention is a disassembly and assembly of the bonnet and disk of the large valve of the power plant, the mechanical parts of the piston and cylinder combination, the disassembly and assembly of the circular bearing and bearing housing, the key disassembly inspection of the block type with low tolerance and the small diaphragm disassembly of the main water turbine It can be applied to assembly.

So far, the lifting device for disassembling and assembly of the valve bonnet according to an embodiment of the present invention has been described with reference to the accompanying drawings, but this is for illustrative purposes, and the present invention is not intended to be limited thereto. As defined by the appended claims, all changes or modifications derived from the meaning and scope of utility model registration claims of the present invention and equivalent concepts thereof should be construed as being included in the scope of the present invention.

10: eye bolt 20: mounting block
20 ': Lug 30: Master Link
40: link chain 50: shackle
50 ': Adjustment bolt 60: Fixing nut
70: end plate 80: bearing housing
90: swivel lug 100: ball bearing
110: thrust bearing 120: adjustment nut
120a: 130: fixing bolt

Claims (5)

Lifting equipment for disassembly and assembly of valves such as safety valves and pressure relief valves in power plants.
Eye bolts (Eye Bolt; 10) as a hanging tool for lifting or moving large heavy objects such as mechanical equipment mainly with a hook on the head;
A mounting block 20 that is combined with the eye bolt 10 and to which a master link 30 is mounted;
A lug 20 'installed at a lower end of the mounting block 20 to select a chain;
A link chain (40) coupled to the master link (30) and used for power transmission by hooking on a ring such as a sprocket wheel to lift heavy materials such as safety valves and pressure relief valves;
Shackle (50) coupled to the chain at the bottom of the link chain (40) for hanging heavy items such as the safety valve and the pressure relief valve; And
Lifting equipment for disassembling and assembly of the valve bonnet, characterized in that it comprises an adjusting bolt (50 ') coupled to the shackle (50) for fine adjustment of the movement stroke of the link chain (40). The method according to claim 1,
An end plate (70) installed at the end of the adjusting bolt to prevent complete loosening of the adjusting bolt (50 '); A lock nut (60) for preventing a stroke movement of the adjustment bolt after setting the adjustment bolt 50 '; Adjustment nut 120 which is screwed to the adjustment bolt 50 'and assembles ball bearing 100 and thrust bearing 110 to facilitate rotation of adjustment bolt 50' and prevent axial movement. ; A bearing housing (80) surrounding the ball bearing (100) and the thrust bearing (110); Fixing bolts 130 installed at both sides of the lower end of the adjusting nut 50 to fix the adjusting nut 120 and the bearing housing 110; And a swivel lug (90) installed at the bottom of the end plate (70) and coupled to the shackle (50). The method according to claim 2,
Lifting equipment for disassembly and assembly of the valve bonnet, characterized in that the adjustment nut (120 ') is provided with a step (120a) is installed so that the adjustment bolt (50') is rotated to be released and no longer released. The method according to claim 1,
Length adjusting stroke of the adjusting bolt (50 ') is 50mm, and the link chain length is 700mm, lifting equipment for disassembling the valve bonnet. The method according to claim 1,
The link chain 40 lifting valve for disassembly and assembly of the valve bonnet, characterized in that three at 120 ° intervals, or two at the interval of 60 ° and two are installed in the diagonal direction.

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