JP5729909B2 - Apparatus and method for extracting / incorporating internal member of pump - Google Patents

Description

The present invention relates to a pump having an inner member having a central axis that is fitted to the inner periphery of a cylindrical casing such as a double casing, and the inside of the pump that pulls out or incorporates the inner member horizontally from the casing. The present invention relates to a member extraction / incorporation apparatus and method.

  In a pump having an inner member having a central axis and fitted to the inner periphery of a cylindrical casing such as a double casing, the inner member needs to be taken out of the casing when the inner member is inspected or repaired. is there.

Conventionally, in a double casing type pump, when the internal member, that is, the internal is extracted from the outer casing, the internal is extracted out of the outer casing by using a disassembly tool that pulls the internal while sliding the inner surface of the outer casing. .
For this reason, damage occurs on the internal surface and the inner surface of the outer casing. Therefore, it is necessary to take care of repairing the damage after extracting the internal. In particular, when the double-casing pump is a pump installed in a radiation control area, the care is performed in the radiation control area. Therefore, the tools necessary for the care and the workers performing the care are required. The increase in the amount of radiation exposure could not be prevented. In the case where the damage is not maintained, the contact surface becomes uneven when the internal is re-installed in the outer casing, so that the assembly becomes difficult.

  Therefore, in Patent Document 1, for the purpose of reducing the occurrence of the damage, the internal member of a pump having an internal member fitted to the inner periphery of a cylindrical casing and having a central shaft is removed from the casing. A technique related to extraction of an internal member of a pump that is extracted in a horizontal direction is disclosed. The technique disclosed in Patent Document 1 will be described with reference to FIG.

FIG. 6 is an explanatory view showing a state during internal extraction of the double casing pump in the prior art.
In extracting the internal 106 from the outer casing 104 of the double casing pump 102, as shown in FIG. 6, shaft sleeves 116a, b, c. A required number of the shafts are connected and a shaft sleeve near the main shaft 108 is supported by a roller 118. Each of the shaft sleeves 116a, b, c... Has the same outer diameter. Further, a pair of rollers 118 are provided so as to sandwich the shaft sleeves 116a, b, c... From below, and the roller pedestal 120 is fixed to the suction cover 113 via a fixed base 121.

Next, the adjusting bolt 119 is operated so that the shaft centers of the shaft sleeves 116 a, b, c... Coincide with the shaft center of the main shaft 108 and the shaft center of the outer casing 104.
Then, a rope 180c suspended from the hook 180a of the monorail 180 is hung on the end of the internal 106, and the main shaft 108 to which the internal 106 and the shaft sleeves 116a, b, c. Then, the monorail 180 is moved to the left in FIG. As shown in FIG. 6, when the internal sleeve 106 is pulled out to the end of the outer casing 104 and the shaft sleeve 116c at the tip end may be detached from the roller 118, the shaft sleeves 116d and e having the same outer diameter are used. Is added to the length that the internal 106 is completely extracted.

  That is, in the prior art described with reference to FIG. 6, the shaft sleeves 116a, b, c... Connected to the main shaft 108 are supported by the rollers 118, the height of the rollers 118 is adjusted by the adjusting bolts 119, and the monorail 180 is used. By adjusting the length of the rope 180c suspended and hung on the internal 106, the axial center of the main shaft 108 and the internal 106 is made to coincide with the axial center of the outer casing 104, so that the internal 106 and the main shaft 108 are aligned. Can be extracted from the outer casing.

Japanese Patent No. 3752038

  However, in the technique disclosed in Patent Document 1 described with reference to FIG. 6, although the internal is supported by a rope suspended by a roller and a monorail, the internal extraction speed, the internal weight, etc. As a result, the support part by the rope is not stabilized, and as a result, the main shaft and the internal shaft are displaced from the axial center of the outer casing, the internal tilts, the internal contacts the inner surface of the outer casing, and the inner surface of the outer casing is damaged. May occur. Due to the occurrence of the damage, it was necessary to carry out maintenance such as repairing the damage before the assembly after extracting the internal, leading to an increase in man-hours.

Therefore, in view of the problems of the prior art, the present invention relates to a pump having a cylindrical casing and an inner member fitted to the inner periphery of the casing and having a central axis, and the inner member and the inner surface of the casing. contact to prevent the, and an object thereof is to provide an internal member extraction / embedded devices and methods of the pump incorporating Sumatawa out vent horizontally inside member from the casing can be prevented from being damaged by the contact .

As an invention of an apparatus for solving the above-mentioned problems, the internal member of a pump having a cylindrical casing and an internal member fitted to the inner periphery of the casing and having a central axis is disposed horizontally from the casing. In the internal member extracting / incorporating device of the pump that is extracted, the rail that extends in the extracting direction of the internal member and the extraction front roller that supports the internal member and can run on the rail, and the side opposite to the extracting direction of the internal member An extraction sleeve that is coupled to the shaft end of the central shaft and an extraction rear roller that supports the shaft sleeve, and that adjusts the height of the support position of the internal member of the extraction front roller. A height adjusting means, and an extraction rear roller height adjusting means for adjusting the height of the extraction rear roller, Serial characterized in that a moving means for travel on the rails in the removal direction of the front side roller withdrawn.

Accordingly, when the internal member is extracted, the internal member is supported by the extraction front roller and the extraction rear roller, so that the support position is not stably shaken.
Further, by providing the extraction front roller height adjustment means and the extraction rear side roller height adjustment means, the height of the support position of the roller, that is, the internal member is adjusted both at the extraction front and rear of the internal member. The axial center of the internal member and the axial center of the casing can be easily matched.
Therefore, the axial center of the internal member and the axial center of the casing are made to coincide with each other by the extraction front roller height adjusting means and the extraction rear roller height adjusting means, and the moving front means moves the extraction front roller to the rail in the extraction direction. By traveling on the upper side, the inner member can be extracted from the casing while the shaft center of the inner member and the shaft center of the casing are stably aligned with each other without shaking.
Thereby, at the time of extraction of an internal member, the damage resulting from the contact of an internal member and a casing resulting from a shift | offset | difference of the axial center of an internal member and a casing, and this contact can be prevented.

The moving means includes a bracket member standing on the rail and having a through hole, one end attached to the internal member, and the other end extending in the direction of extracting the internal member and penetrating the through hole. It is preferable that the guide bolt has an outer periphery screwed and a nut screwed to the guide bolt on the inner member drawing side of the bracket member.
As a result, the position of the nut is fixed on the internal member pull-out side of the bracket member. Therefore, when the nut is tightened, the guide plate is screwed into the nut, and is extracted as the guide plate is moved by screwing. The front roller runs on the rail and the internal member is extracted from the casing. That is, the internal member can be extracted simply by tightening the nut, and the operation related to extraction becomes simple.

The bracket member may be configured to be detachable from the rail, and may be attached to the rail at a position corresponding to the extracted state of the internal member.
Thereby, it can prevent that a bracket member becomes an obstruction of an internal member.

Further, as an invention of a method for solving the problem, the internal member of a pump having a cylindrical casing and an internal member fitted to the inner periphery of the casing and having a central axis is disposed horizontally from the casing. In the method of extracting / incorporating the internal member of the pump that is extracted in the direction, a rail is installed in the extraction direction of the internal member, and an extraction front side roller that supports the internal member and can run on the rail is attached, and the internal member A shaft sleeve is connected to the shaft end of the central shaft on the opposite side to the pulling direction of the shaft, a pulling rear roller for supporting the shaft sleeve from below is attached, and the height of the supporting position of the inner member of the pulling front roller And adjusting the height of the extraction rear side roller so that the axis of the internal member and the axis of the casing coincide, The front roller out can then travels on the rail in the removal direction, characterized in that withdrawing the inner member from the casing.

  In addition, a bracket member having a through hole is attached on the rail, and a guide bolt is provided on the inner member, the outer periphery of which is threaded and extending in the extraction direction of the inner member to penetrate the through hole. It is preferable that a nut is screwed into the guide bolt on the inner member pulling side of the inner member, and the nut is tightened so that the guide bolt is screwed and the inner member is extracted from the casing.

  Further, the mounting position of the bracket member on the rail may be changed in accordance with the extraction of the internal member.

According to the present invention, for a pump having a cylindrical casing and an inner member fitted to the inner periphery of the casing and having a central axis, contact between the inner member and the inner surface of the casing is prevented, It is possible to provide an apparatus and method for extracting / incorporating an internal member of a pump that horizontally extracts an internal member that can prevent the occurrence of damage due to the contact from the casing.

It is explanatory drawing which shows the state before internal extraction of the double casing pump in this embodiment. It is explanatory drawing which shows the state during the internal extraction of the double casing pump in this embodiment. It is a perspective view which shows the state during the internal extraction of the double casing pump in this embodiment. It is explanatory drawing which shows the state after internal extraction of the double casing pump in this embodiment. It is a perspective view which shows the state after internal extraction of the double casing pump in this embodiment. It is explanatory drawing which shows the state during the internal extraction of the double casing pump in a prior art.

  Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the components described in this embodiment are not intended to limit the scope of the present invention unless otherwise specified, but are merely illustrative examples. Not too much.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1, 2, and 4 are explanatory views showing states before, during, and after the internal extraction of the double casing pump in the present embodiment, respectively, in the order of FIG. 1, FIG. 2, and FIG. 4. It shows how work is progressing. 3 and 5 are perspective views in the state of FIGS.

First, the structure which concerns on the internal extraction of the double casing pump in this embodiment is demonstrated using FIGS.
1 to 5, 2 is a double casing pump, 4 is an outer casing, 6 is an internal assembled to the inner periphery of the outer casing 4, and 8 is a main shaft inserted through the center of the internal 6.

  The main shaft 8 has a plurality of shaft sleeves 16 a, 16 b, via a spacer mounting base 10 attached to the internal 6 at the shaft end opposite to the direction in which the internal 6 is extracted (left side in FIGS. 1, 2, 4). 16c, 16d, and 16e are connected. The shaft centers of the shaft sleeves 16 a, 16 b, 16 c, 16 d, and 16 e coincide with the shaft center of the main shaft 8.

  A pair of rollers 18 are provided so as to sandwich the shaft sleeves 16a, 16b, 16c, 16d, and 16e from below, and are provided to support the shaft sleeves 16a, 16b, 16c, 16d, and 16e from below. Yes. Reference numeral 21 denotes a roller receiving portion which rotatably supports the roller 18 and is fixed to the outer casing 4 via a roller receiving base 20. An adjustment bolt 19 is screwed into the roller receiving base 20, and the roller receiving portion 21 is configured to be movable up and down along the roller receiving base 20 by the adjusting bolt 19.

A pull-out rail 22 is attached to the outer casing 4 so as to extend in the direction in which the internal 6 is pulled out (the left side in FIGS. 1, 2, and 4). The pull-out rail 22 is attached to the outer casing 4 and supported by a jack 24 so that the height can be adjusted.
The drawer rail 22 is provided with a plurality (five in the present embodiment) of guide plate mounting holes 23a, 23b, 23c, 23d, and 23e, and a guide plate 32 is erected in one of the guide plate mounting holes. The guide plate 32 is fixed by bolts 33.

  The guide plate 32 has a through hole penetrating in the direction of extracting the inner casing, and the through hole is larger than a diameter of a guide bolt 30 described later and smaller than an outer diameter of a nut 34 described later.

In addition, a ring-shaped inner casing support 26 is attached to the internal 6 in the extraction direction. The inner casing support 26 is provided with a roller 28 that supports the internal 6 via the inner casing support 26 and can travel along the pull-out rail 22, and the internal 6 along the pull-out rail 22. A guide bolt 30 is attached to extend in the direction of extraction. The outer periphery of the guide bolt 30 is threaded and passes through the through hole of the guide plate 32.
Further, a nut 34 screwed to the guide bolt 30 is attached to the guide plate 32 on the internal 6 extraction direction side.

Next, the procedure for extracting the internal 6 of the double casing pump 2 in the above configuration will be described.
First, ancillary equipment of the double casing pump 2 such as a gearbox, a bearing box, a mechanical seal, a casing cover, and a suction cover (all not shown) are removed. 1 to 5 show a state after the auxiliary devices are removed.

Next, the shaft sleeves 16 a and 16 b are attached to the spacer mounting base 10 and the spacer mounting bracket 12 is attached. Then, the spacer mounting bracket 12 by lifting rope 14 or the like, the shaft sleeve 16a, and 16b through the main shaft 8, opposite punching out Shi the direction of the internal 6 spacer mount 10 (the left side in FIG. 1-5) Install from the side to the internal.

  Next, the roller 18 is attached to the roller receiving base 20 fixed to the outer casing 4 via the roller receiving portion 21, and the shaft sleeve 16 a is supported by the roller 18. Next, the shaft sleeves 16c, 16d, and 16e are attached. The shaft sleeve can be added according to the internal pull-out situation.

  Next, a pull-out rail 22 extending in the direction in which the internal 6 is pulled out is attached to the outer casing 4. The drawer rail 22 is supported by adjusting the height with a jack 24.

  Next, a ring-shaped inner casing support 26 is attached in the direction of extracting the internal 6. At this time, after the inner casing support 26 is equipped with rollers 28 in advance, the inner casing support 26 is attached to the internal 6. The inner casing support 26 is attached to the internal 6 so that the roller 28 is positioned on the drawer rail 22.

Next, the guide plate 32 is attached to one of the plurality of guide plate attachment holes (23b in FIG. 1) provided in the pull-out rail 22 and fixed with bolts 33. Next, the other end of the guide bolt 30 is fixed to the inner casing support 26 so that one end passes through the through hole of the guide plate 32. Then, the nut 34 is screwed to the guide bolt 30.
FIG. 1 shows a state where the above procedure has been completed.

  Next, the adjustment bolt 29 is adjusted to adjust the height of the position where the roller 28 is attached to the inner casing support, and the adjustment bolt 19 is adjusted to adjust the height of the roller 18. And the axial center of the outer casing 4 are made to coincide with each other so that a certain gap or more is provided between the internal 6 and the outer casing 4. At this time, it is easy to provide a gap gauge for measuring the gap between the internal 6 and the outer casing 4 and adjust the adjustment bolt 29 and the adjustment bolt 19 so that the gap becomes a certain level or more while checking the gap gauge. Adjustments can be made. The above-described gap may be a gap where the internal 6 and the outer casing 4 do not come into contact with each other due to vibration or the like when the internal 6 described later is extracted.

Next, the nut 34 is tightened. As a result, the guide bolt 30 is screwed into the nut 34, and the internal 6 is extracted accordingly.
As shown in FIGS. 2 and 3, after tightening the nut 34 until the spigot portion is pulled out, the adjustment bolt 29 and the adjustment bolt 29 and again so as to have a certain gap or more between the internal 6 and the outer casing 4. Adjust the adjustment bolt 19.

  Next, the nut 34 is further tightened, and as shown in FIGS. 4 and 5, the inner casing is pulled out to a position where the lifting bolts 38 and 40 can be attached. At this time, when the inner casing support 26 and the guide plate 32 approach each other, the nut 34 is temporarily stopped and the guide plate 32 is moved to the drawer rail 22 so that the inner casing support 26 and the guide plate 32 do not come into contact with each other. Change the mounting position. In the present embodiment, the guide plate 32 is replaced with the guide plate mounting holes 23b to 23e from the state of FIGS. 2 and 3 to the state of FIGS.

  Next, the lifting bolts 38 and 40 are attached to the internal 6, and the lifting bolts 38 and 40 are lifted by the wire 42 or the like.

  According to the above embodiment, the shaft sleeves 16 a, 16 b, 16 c... Connected to the main shaft 8 are supported by the roller 18, the height of the roller 18 is adjusted by the adjusting bolt 19, and the inner casing attached to the internal 6. The support base is supported by the roller 29 and the height of the support position by the roller 28 is adjusted by the adjustment bolt 29, so that the axis 6 of the internal 6 and the axis of the outer casing 4 coincide with each other. The internal 6 can be pulled out from the outer casing 4 together with the main shaft 8 by providing a certain gap or more with the main shaft 8.

  Thereby, when the internal 6 is pulled out from the outer casing 4, it is possible to avoid the axial misalignment between the internal 6 and the inner periphery of the outer casing 4 and the occurrence of the inclination of the internal 6. The contact with the inner periphery of 4 can be prevented. Therefore, it is possible to prevent the internal 6 and the outer casing 4 from being damaged due to the contact between the internal 6 and the inner periphery of the outer casing.

  Further, as described above, by using the pull-out rail 22, the guide plate 32, and the nut 34, the internal 6 can be extracted simply by tightening the nut, and the operation relating to the extraction becomes simple.

  In addition, when incorporating the internal 6 into the inner periphery of the outer casing 4, the reverse procedure to that described above may be performed.

For a pump having a cylindrical casing and an inner member fitted to the inner periphery of the casing and having a central axis, contact between the inner member and the inner surface of the casing is prevented, and damage due to the contact occurs. It can be used as an internal member extraction / incorporation apparatus and method for a pump that extracts an internal member that can prevent the horizontal displacement from the casing in the horizontal direction.

2 Pump 4 External casing 6 Internal (internal member)
8 Spindle (center axis)
10 Spacer mount 16a, 16b, 16c, 16d, 16e Shaft sleeve 18 Roller (extraction rear roller)
19 Adjustment bolt (extraction rear roller height adjustment means)
22 Pull-out rails 23a, 23b, 23c, 23d, 23e Guide plate mounting holes 26 Inner casing support base 28 Roller (extraction front roller)
30 Guide bolt 32 Guide plate (bracket member)
34 nuts

Claims (4)

In an internal member extraction / incorporation device for a pump having a cylindrical casing and an internal member fitted to the inner periphery of the casing and having a central axis, the internal member of the pump for horizontally extracting the internal member from the casing.
A rail extending in the extraction direction of the internal member and an extraction front side roller that supports the internal member and can run on the rail;
A shaft sleeve connected to the shaft end of the central shaft on the opposite side to the pulling direction of the internal member, and a pulling back roller for supporting the shaft sleeve;
An extraction front roller height adjustment means for adjusting the height of the support position of the internal member of the extraction front roller, and an extraction rear roller height adjustment means for adjusting the height of the extraction rear roller,
A moving means for causing the extraction front roller to travel on the rail in the extraction direction;
The moving means is
A bracket member standing on the rail and having a through hole;
One end is attached to the internal member, the other end extends in the extraction direction of the internal member and penetrates the through hole, and a guide bolt having an outer periphery screwed,
An internal member extracting / incorporating device for a pump, comprising: a nut screwed to the guide bolt on the internal member drawing side of the bracket member. The bracket member is configured to be detachable from the rail,
2. The internal member extraction / incorporation device for a pump according to claim 1, wherein the internal member extraction / incorporation device is mounted on the rail at a position corresponding to an extraction state of the internal member. In a method of extracting / incorporating an internal member of a pump that has a cylindrical casing and an internal member that is fitted to the inner periphery of the casing and that has a central axis, and that extracts the internal member from the casing in a horizontal direction.
Installing a rail in the extraction direction of the internal member, attaching an extraction front side roller that supports the internal member and can run on the rail;
A shaft sleeve is connected to the shaft end of the central shaft on the opposite side to the pulling-out direction of the internal member, and a pull-out rear roller for supporting the shaft sleeve from below is attached,
Adjusting the height of the support position of the inner member of the extraction front roller and the height of the extraction rear roller to match the axis of the inner member and the axis of the casing;
In the internal member extraction / incorporation method of the pump, in which the extraction front roller runs on the rail in the extraction direction and extracts the internal member from the casing,
While attaching a bracket member having a through hole on the rail,
The inner member is provided with a guide bolt whose outer periphery is threaded and extends in the extraction direction of the inner member and penetrates the through hole,
A nut is screwed into the guide bolt on the internal member pull-out side of the bracket member,
A method for extracting / incorporating an internal member of a pump, wherein by tightening the nut, the guide bolt is screwed to extract the internal member from the casing. 4. The method for extracting / incorporating the internal member of the pump according to claim 3 , wherein the mounting position of the bracket member on the rail is changed in accordance with the extraction of the internal member.

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