KR20180079714A - Guide device for heavy weight long bolt - Google Patents

Abstract

The present invention relates to a high weight long bolt guide device comprising: a cylindrical pipe part installed at an entrance of a bolt hole to guide a long bolt when the long bolt is disassembled and fastened; a variable bearing part installed to be variably protruded on an inner circumference of an entrance of a cylindrical pipe part to hold or unroll the long bolt when the long bolt is guided; moving restriction plate parts installed at a regular intervals inside the entrance circumference of the cylindrical pipe part to control rotation of the cylindrical pipe part and movement of the variable bearing part; and a key lever part installed inside both circumferences of the cylindrical pipe part to fix the variable bearing part by temporarily coupling the variable bearing part to a moving restriction plate after moving. The high weight long bolt of a large facility can maintain centering by setting a variable bearing installed inside the guide device when the high weight long bolt of the large facility is disassembled and coupled in a horizontal state, and thus it is possible to perform an efficient and stable disassembly and fastening process.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a heavy-

The present invention relates to a heavy-weight long bolt guide apparatus, and more particularly to a heavy-weight long bolt guide apparatus capable of maintaining centering through setting of a variable-type bearing provided inside a guide apparatus when disassembling and fastening a heavy- And a fast bolt guiding device capable of continuing the tightening work process.

Generally, in the case of many large facilities (generators, turbines, valves, pumps) installed in the plant industry including the power plant, after a certain period of use, Reliability can be ensured.

Especially, in the dismantling and fastening of heavy bolts according to the precise inspection of large facilities, various lifting devices (crane, chain block) are used, while in the environment where the lifting device is difficult to use, many workers are mobilized to carry out the work .

Therefore, when a high-altitude operation such as vertical or horizontal is required for dismantling and fastening long bolts of heavy weight due to precision inspection of water turbine generator and entrance side which are large facilities of domestic pumping power plant, especially when the lifting device can not be utilized, It is essential to secure a safe working environment.

Generally, heavy weight long bolts have already been widely disclosed, and a detailed description thereof is omitted, and reference is made to registered patent No. 10-0320990 entitled "Casing fastening bolt and nut decomposing device for high-pressure turbine ".

On the other hand, as shown in Figs. 1 and 2, in the process of supporting the heavy bolt (B) of the large facility (G) by the gravity of the long bolt (B) A large number of manpower is input for the centering operation of the long bolt (B) and the bolt hole (H), but there is a great risk of scratching and notching of the bolt neck portion due to the centering failure.

The heavy bolts (about 40kg) are held horizontally in the bolt hole at the elevated position of the pumped storage power plant, and disassembled and assembled, resulting in a high frequency of safety accidents such as heavy weight drop, stenosis and falling, and high maintenance difficulty.

In addition, where the lifting device can not be used depending on the work site, a lot of manpower is put into work.

In addition, there is a problem in that it is not possible to secure a component requiring a precise inspection such as a hydraulic power generator and an inlet valve under a safe working environment.

In addition, in order to solve this problem by the bolt deflection due to the weight and length of the bolt when disassembling and fastening the bolt, when the work is carried out between the bolt hole and the bolt neck, .

In addition, there is a problem in that a heavy bolt having a large diameter is likely to cause a safety accident such as a fall and stenosis due to an operator's mistake when disassembling and fastening.

[Patent Literature 0001] Registered Patent No. 10-0320990 entitled "Bolt and nut disassembly device for casing tightening of high-pressure turbine" (Bulletin 2002.01.18)

An object of the present invention is to make it possible to variously apply to the decomposition and fastening of heavy-weight bolts installed in nuclear power plants, thermal power plants, and other industrial sites as well as domestic pumping plants.

It is another object of the present invention to provide an apparatus and a method for controlling a long bolt and a center bolt by setting a variable bearing of a guide device when disassembling and fastening a long heavy bolt of a large facility in a horizontal state, have.

It is another object of the present invention to provide a method and apparatus for various applications such as vertical and horizontal operations for decomposing and fastening heavy weight long bolts through general inspections or precise inspections after a period of use in a large facility such as a nuclear power plant or a thermal power plant, And to ensure the reliability of the operating state by securing the working environment.

The heavy-weight long bolt guide device according to the present invention comprises a cylindrical tube portion provided at an inlet of a bolt hole for guiding a long bolt in disassembling and fastening a long bolt of a large facility, and a cylindrical tube portion provided at the entrance of the cylindrical tube portion for gripping or releasing the long bolt when guiding the long bolt A plurality of movable limiting plates installed at predetermined intervals in the circumference of the inlet of the cylindrical tube portion to control the rotation of the cylindrical tube portion and the movement of the variable bearing portion, And a key lever portion provided on both sides of the cylindrical tube portion so as to temporarily fix the variable bearing portion to the movement restricting plate together with the variable bearing portion to fix the variable bearing portion.

The cylindrical tube portion may include: a guide tube into which a long bolt is inserted; A fixed disk integrally formed around an inlet of the guide tube; A ring-shaped rotary disk integrally installed with a space for installing a variable bearing portion, a movement restricting plate portion, and a key lever portion on an upper portion of the fixed disk so as to be rotatable when the long bolt is caught or released; And a handle plate protruding from both sides of the fixed disk and the ring-shaped rotary disk.

The variable bearing portion may include a roller frame that moves along the inner side of the movement restricting plate portion when the ring-shaped rotary disk is rotated, a roller frame that protrudes from the inner circumferential surface of the guide tube at the time of forward movement of the roller frame, And a roller pushing elastic member which is assembled to the roller frame so as to push the roller portion at all times outwardly.

The roller frame includes an upper plate fixed to the inner surface of the ring-shaped rotary disk and opened toward the center of the guide tube so that the roller can be projected, a middle plate bent toward the center of the guide tube and guiding the roller portion, And a lower plate that is bent toward the key lever portion in the intermediate plate and has a slide groove for guiding the roller portion pushing the roller pushing elastic member toward the key lever portion.

The roller unit may include a roller formed on the roller shaft so as to move between the upper plate and the middle plate and to grip or release the long bolt and a roller pushing elastic member interposed between the middle plate and the lower plate to easily push the roller shaft And a roller guide plate at the lower end of the roller shaft which is slidably assembled to the slide groove of the lower plate.

The movement restricting plate portion includes a stopper projection projecting in a counterclockwise direction along the inner side of an arc-shaped plate connecting fixed blocks formed on both sides of the fixed circular plate at regular intervals, and a stopper projection projecting clockwise And a protrusion protruding from the protrusion.

The key lever portion includes a lever housing formed on the handle plate of the ring-shaped rotary disk, a latch pin provided on the pin housing so as to be hooked on the locking projection of the arc plate in the lever housing, A latch lever which is assembled by being exposed to the outside of the lever housing while being arranged so as to be able to variably push the rear end of the latch pin and a lever retraction spring which is installed so that the lever projection is always pushed and separated from the latch lever, .

In the heavy-weight long bolt guide apparatus according to the present invention, when a long bolt having a high weight is disassembled and fastened in a horizontal state, the bolt neck portion due to the deflection of the bolt causes a notch and a crack due to friction with the bolt hole, It is possible to solve the potential problems such as thread damage or sticking due to bolt deflection, thereby protecting the equipment.

In addition, there is an effect that it is possible to prevent a safety accident caused by a fall at the time of disassembling and fastening at a high altitude position.

According to the present invention, it is possible to maintain deflection and centering through setting of the variable bearing portion during disassembly and fastening in a long bolt horizontal state of a heavy equipment in a large facility, and thus, an effective and stable work process can be continued.

The guiding device is set to satisfy the simultaneous conditions such as bolt deflection and centering when disassembling and fastening the long bolt with a high weight, and it is possible to perform the facility protection and efficient and stable operation.

It is installed at the entrance of turbine valve pump bolt hole of large capacity generator, and it prevents scratch and notch of neck part when disassembling and assembling of heavy bolt long bolt, so it has the effect of guiding safely when inserting or withdrawing heavy weight long bolt .

In addition, there is an effect that disassembly and fastening operation of a heavy bolt can be performed even if a large number of manpower is not mobilized.

FIG. 1 is an image showing a heavy-weight long bolt according to the prior art, and a disassembling and fastening operation using the same.
Fig. 2 is a view showing deflection of a long bolt occurring during decomposition and tightening of a conventional heavy-weight long bolt; Fig.
3 is a view showing a heavy-weight long bolt guide apparatus according to the present invention.
4 is a partially exploded view of a heavy-weight long bolt guide apparatus according to the present invention.
5 is a view showing AA in Fig. 3; Fig.
6 is a view showing the action of the variable bearing portion and the key lever portion shown in Fig.
7 is a view showing disassembly and fastening of a long bolt with a heavy-weight long bolt guide apparatus according to the present invention.

For a better understanding of the present invention, a preferred embodiment of the present invention will be described with reference to the accompanying drawings. The embodiments of the present invention may be modified into various forms, and the scope of the present invention should not be construed as being limited to the embodiments described in detail below. The present embodiments are provided to enable those skilled in the art to more fully understand the present invention. Therefore, the shapes and the like of the elements in the drawings can be exaggeratedly expressed to emphasize a clearer description. It should be noted that in the drawings, the same members are denoted by the same reference numerals. Further, detailed descriptions of well-known functions and configurations that may be unnecessarily obscured by the gist of the present invention are omitted.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a heavy-weight long bolt guide apparatus according to the present invention will be described in detail with reference to the accompanying drawings.

3 to 7, the heavy-weight long bolt guiding device 20 according to the present invention includes a bolt hole 10 for guiding the long bolt B when the long bolt B is disassembled and fastened, And a plurality of variable bearing portions (not shown) provided so as to be variably protruded on the inner circumferential surface of the inlet of the cylindrical pipe portion P so as to catch or release the long bolt B when the long bolt B is guided And a plurality of moving limiting plates M installed at predetermined intervals in the circumference of the inlet of the cylindrical tube portion P so as to control the rotation of the cylindrical tube portion P and the movement of the variable bearing portion V, And a key lever portion provided inside the outer peripheries of both sides of the cylindrical tube portion P so as to be able to temporarily fix the variable bearing portion V by temporarily engaging with the movable limiting plate portion M together with the variable bearing portion V, (L).

Further, the cylindrical pipe portion P includes a guide pipe 10 into which a long bolt B is inserted; A fixed disk 2 integrally formed around an inlet of the guide tube 10; A movable limit plate M and a key lever L can be installed on the fixed disk 2 so that the long bolt B can be rotated when the long bolt B is gripped or released. A ring-shaped rotary disk 4 which is assembled and installed; And a handle plate (6) protruding from both sides of the stationary disk (2) and the ring - shaped rotary disk (4).

A movable restricting plate portion M is formed between the fixed disk 2 and the ring-shaped rotation disk 4 so as to form a space for installing the variable bearing portion V, the movement restricting plate portion M and the key lever portions L. [ The space retaining protrusions 8 are formed.

The variable bearing portion V includes a roller frame 70 which moves along the inner side of the movement restricting plate portion M when the ring-shaped rotary disk 4 is rotated, A roller portion 60 projected from an inner circumferential surface of the pipe 10 and assembled to the roller frame 70 so that the long bolt B can be loosened and held; 70, and a roller pushing elastic member 76 assembled to the roller pressing member.

The roller frame 70 includes an upper plate 71 fixed to the inner surface of the ring-shaped rotary disk 4 and opened toward the center of the guide tube 10 so that the roller portion 60 can be protruded, A middle plate 73 which is bent toward the center of the guide tube 10 in the upper plate 71 and guides the roller unit 60 and a middle plate 73 which is bent toward the key lever portion L from the middle plate 73, And a lower plate 74 formed with a slide groove 75 for guiding the roller portion L to which the elastic member 76 pushes toward the key lever portion L side.

The roller unit 60 includes a roller 63 formed on the roller shaft 64 so as to move between the upper plate 71 and the middle plate 73 so as to grip or release the long bolt B, A roller shaft elastic member 76 interposed between the lower plate 73 and the lower plate 74 is mounted on the roller shaft 64 slidably mounted on the slide groove 75 of the lower plate 74 so as to easily push the roller shaft 64 64) and a roller guide plate 66 at the lower end.

The roller pressing elastic member 76 is installed between the middle plate 73 and the lower plate 74 so as to support the roller shaft 64 with an elastic force.

The movement restricting plate portion M includes a stopper plate 42 projecting counterclockwise along the inside of the arc plate 42 connecting the fixed block 46 formed on both sides of the fixed circular plate 2 at regular intervals, And includes a protrusion 43 and a locking protrusion 45 protruding clockwise along the outside of the arcuate plate 42.

The movement restricting plate portion M is inclined at an angle close to the inner diameter from the center line of the fixed circular plate 2. [ That is, as the position of the roller frame 70 is changed by rotating the ring-shaped rotary disk 4, the roller shaft 64 assembled thereto is pressed by the stopper projection 43. [ At this time, the roller pressing elastic member 76 is compressed and the roller 60 of the roller shaft 64 protrudes through the roller hole 12 in the inner circumferential surface of the guide pipe 10.

The key lever portion L has a lever housing 81 formed on the handle plate 6 of the ring-shaped rotary disk 4 and a locking projection 45 of the arc plate 42 in the lever housing 81, A pin push spring 85 is attached to the support protrusion 84 so that the front side of the latch pin 83 is always pushed to unlock the latch pin 83 and the latch pin 83 A latch lever 87 which is assembled by being exposed to the outside of the lever housing 81 while being arranged so as to be able to freely push the rear end of the lever 85 in a state of being separated from the latch lever 87, And a retraction spring 87.

Hereinafter, the use of the heavy-weight long bolt guide apparatus will be described with reference to the present invention as described above.

Explaining an example in which the heavy bolts B are disassembled,

First, the nut (N) is separated from the heavy-weight long bolt (B) fastened to the large facility. The heavy-weight long bolt guide device 20 is inserted horizontally into the exposed heavy bolt B in the horizontal direction. When insertion into the long bolt (B) is completed, it is supported so as not to be sagged using the heavy-weight long bolt guide device (20). Then, in the state where the long bolt (B) is supported by the heavy-weight long bolt guide device (20), the ring-shaped rotary disk (4) is rotated counterclockwise by using the handle plate (6). The roller 63 of the roller portions 60 protrudes through the roller hole 12 of the guide tube 10 by the rotation of the ring-shaped rotary disk 4. [ The rollers 63 protruding toward the center of the guide tube 10 hold the inserted long bolt B and center it.

Thereafter, when the long bolt (B) is continuously rotated, the long bolt (B) is separated from the bolt hole (10). Even if the long bolt B is detached from the bolt hole 10, it is not sagged because it is supported in the horizontal state by the heavy-weight long bolt guide device 20. [ Therefore, the long bolt B is prevented from damage or sticking of the thread.

The long bolt (B) thus separated is prepared on site for tightening after maintenance inspection.

On the other hand, when the ring-shaped rotary disk 4 is rotated using the handle plate 6, the roller frame 70 formed on the ring-shaped rotary disk 4 is also moved. At this time, the roller shaft 64 in the roller frame 70 is supported by the elastic member 76 for pushing the roller, so that the roller shaft 64 moves along the stopper projection 43 of the plate portion 42.

The roller shaft 64 moved on the stopper projection 43 is kept pressed by the arc-shaped plate portion 42. [ The rollers 63 formed on the roller shaft 64 are projected toward the center of the guide tube 10 through the roller holes 12. [

As the roller portions 60 are projected, the long bolt B is positioned at the center of the guide pipe 10 by the rollers 63. When the ring-shaped rotary disk 4 is rotated in the clockwise direction, the roller shaft 64 is moved along with the movement of the roller frame 70 by the elastic force of the roller pushing elastic member 76, 12). That is, when the roller 63 enters the roller hole 12, the heavy-weight long bolt guide device 20 becomes detachable from the long bolt B.

Next, the case of fastening the long bolt B will be described.

First, when the maintenance check on the long bolt (B) is completed, the heavy bolt guide device (20) is inserted into the long bolt (B). Then, the long bolt (B) is leveled and aligned so as to coincide with the bolt hole (10). The long bolt B in the horizontal state is inserted into the bolt hole 10 by using the heavy-weight long bolt guide device 20, and the fastening operation is performed.

At this time, the long bolt B is continuously guided by the heavy-weight long bolt guide device 20 and remains in a horizontal state even when partially inserted into the bolt hole 10. Then, the ring-shaped rotary disk 4 is turned clockwise to insert the roller 63 into the roller hole 12. The fastening operation of the long bolt B is completed by fastening the long bolt B to the bolt hole 10 through the guide pipe 10 and then joining the nut N. When the fastening of the long bolt (B) is completed, the heavy-weight long bolt guide device (20) is smoothly separated from the long bolt (B).

As described above, the heavy-weight long bolt guide apparatus 20 prevents damage or fixation of the threads when the long bolts B are disassembled and fastened to the bolt holes 10 of a large facility. And, the heavy bolt guide device (20) ensures the stable working process during disassembly and fastening work, so that protection of large facilities and safety accidents are prevented.

The embodiments of the heavy-weight long bolt guide apparatus of the present invention described above are merely illustrative and those skilled in the art will appreciate that various modifications and equivalent embodiments are possible without departing from the scope of the present invention. You will know very well. Therefore, it is to be understood that the present invention is not limited to the above-described embodiments. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims. It is also to be understood that the invention includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.

B: Long bolt H: Bolt hole
L: Key lever part M: Restriction plate
P: Cylindrical tube part V: Variable bearing part
2: fixed disk 4: ring-shaped rotating disk
6: handle plate 8: space retaining projection
10: guide tube 12: roller hole
42: arc plate 43: stopper projection
45: Locking block 46: Locking block
60: roller portion 63: roller
64: roller shaft 66: roller guide plate
70: roller frame 75: slide groove
76: elastic member for roller pushing 81: lever housing
82: pin shaft 83: latch pin
84: Support projection 85: Pin push spring
87: Latch lever 88: Lever projection
87: Lever retraction spring

Claims (7)

A cylindrical tube portion provided at the entrance of the bolt hole to guide the long bolt when the long bolt of the large facility is disassembled and fastened,
A plurality of variable bearing portions provided so as to be variably protruded on the inner circumferential surface of the inlet of the cylindrical tube portion so as to catch or release the long bolt when guiding the long bolt,
A plurality of moving limiting plates installed at predetermined intervals in the circumference of the inlet of the cylindrical tube portion to control the rotation of the cylindrical tube portion and the movement of the variable bearing portion;
And a key lever unit installed on both sides of the cylindrical tubular part so as to fix the variable bearing unit by temporarily engaging with the movable restricting plate together with the variable bearing unit.
The method according to claim 1,
Wherein the cylindrical tube portion includes:
A guide tube into which a long bolt is inserted; A fixed disk integrally formed around an inlet of the guide tube; A ring-shaped rotary disk integrally installed with a space for installing a variable bearing portion, a movement restricting plate portion, and a key lever portion on an upper portion of the fixed disk so as to be rotatable when the long bolt is caught or released; And a handle plate protruding from both sides of the fixed disk and the ring-shaped rotary disk.
The method according to claim 1,
The variable-
A roller portion that is projected from the inner circumferential surface of the guide tube when the roller frame is moved forward and is assembled to the roller frame so that the long bolt can be loosened and held; And an elastic member for pushing the roller, which is assembled to the roller frame so as to always push the roller portion outwardly.
The method according to claim 1,
The roller frame includes:
An upper plate fixed to the inner surface of the ring-shaped rotary disk and opened toward the center of the guide tube so that the roller can be projected, a middle plate bent toward the center of the guide tube in the upper plate and guiding the roller portion, And a lower plate folded toward the lower portion and formed with a slide groove for guiding the roller portion pushing the roller pushing elastic member toward the key lever portion.
The method according to claim 1,
The roller unit
A roller formed on an upper portion of the roller shaft so as to move between the upper plate and the middle plate and to grip or release the long bolt and a roller push elastic member interposed between the middle plate and the lower plate slide in the slide groove of the lower plate so as to easily push the roller shaft. And a roller guide plate at the lower end of the roller shaft to be assembled.
The method according to claim 1,
The movement restricting plate portion includes:
A stopper projection protruding in a counterclockwise direction along an inner side of an arc plate connecting fixed blocks formed on both sides of the fixed circular plate at regular intervals and a locking protrusion protruding clockwise along the outer side of the arc plate Features a heavy-weight long bolt guide device.
The method according to claim 1,
The key lever portion
A latch pin formed on the handle plate of the ring-shaped rotary disk, the latch pin being installed in a pin housing so as to be hooked on the latching protrusion of the arc plate in the lever housing, and a pin push spring on the support protrusion so that the front side of the latch pin is always pushed, And a lever retracting spring which is provided so as to push the lever protrusion all the time and to be separated from the latch lever at all times, characterized by comprising: a latch lever which is disposed so as to be able to varyly push the rear end of the latch pin and assembled by being exposed to the outside of the lever housing; Long bolt guide device.

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