JP2018132270A - Flanged cover support frame - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flanged cover support frame capable of having a flanged cover efficiently fitted to cylindrical equipment, having the flanged cover, which is installed in a place where a sufficient work space cannot be secured around it so that center axes are accurately aligned with each other.SOLUTION: A flanged cover support frame 1 comprises: a jack 2 consisting of a pedestal 2a and an adjusting screw 2b; a base 3 having the jack 2 installed on an upper surface; support means 4 installed over the jack 2 by coupling a long-sized receiver 6 and a pressure 7, installed horizontally to abut on a lower part and an upper part of a side face of a water chamber cover 55, through a pair of coupling rods 8, 8; and a guide pipe 5 inserted into bolt holes 53b, 55b of flanges 53a, 55a of a trunk part 53 and the water chamber cover 55.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a flanged cover support frame used in an open inspection operation or the like of a device having a flanged cover, and in particular, a flanged cover support that can be used even when a sufficient space cannot be ensured during disassembly work or assembly work. Concerning the mount.

  An oil cooler may be used to cool the lubricating oil used in the reactor water pump bearings. About this oil cooler, what is called "open inspection" which removes a water chamber cover etc. and inspects an inside is regularly implemented. After the inspection, parts such as the water chamber cover are returned to the original state. However, in order to ensure watertightness and airtightness, it is necessary to always perform assembly work with high accuracy.

Here, the structure of the oil cooler will be described with reference to FIGS.
FIG. 5A is an external view of the oil cooler, and FIG. 5B is an enlarged longitudinal sectional view of the water chamber cover and its peripheral portion in FIG. That is, FIG.5 (b) has shown the state cut | disconnected in the perpendicular direction by the plane containing the cylindrical shaft of a trunk | drum while expanding a water chamber cover and its peripheral part in Fig.5 (a). FIG. 5C is a plan view of the flange, and FIG. 5D is a plan view of the O-ring and the annular plate. Further, FIGS. 6A and 6B are enlarged views of a portion A in FIG. 5B. 6A shows a state in which the water chamber cover is correctly attached to the trunk portion, and FIG. 6B shows a state in which the water chamber cover is attached to the trunk portion while being inclined. .

As shown in FIGS. 5 and 6, the oil cooler 51 is a cylindrical body that is installed on a support base 52 fixed on the floor of a building such as a power plant so that the axial direction is horizontal. A tube plate 54 having a portion 53, a plurality of tubes (not shown) accommodated in the body portion 53, and a plurality of insertion holes through which the ends of the tubes are inserted.
Water chamber covers 55 and 55 are installed at both ends of the body portion 53 provided with the flange 53a. The water chamber cover 55 is connected to the flange 53a using bolts (not shown). As a result, the body portion 53 is fixed. The flanges 53a and 55a have a plurality of bolt holes 53b and 55b, and an O-ring 57 and an annular plate 58 are embedded in end faces facing each other when the water chamber cover 55 is attached to the body portion 53, respectively. An annular groove 56a, 56b is provided.

  As will be described later, the O-ring 57 on the water chamber cover 55 side is extrapolated to the tube plate 54 before attaching the water chamber cover 55 to the trunk portion 53, and the annular groove 56 b of the flange 55 a, the tube plate 54, and the annular plate 58. It is inserted into the annular groove 56a while being crushed by. Therefore, as shown in FIG. 6B, when the water chamber cover 55 is attached to the trunk portion 53 in an inclined state, the corners of the annular groove 56b of the flange 55a can easily bite the O-ring 57. The O-ring 57 may be cracked.

  In order to prevent the flange 55 a from being caught in the O-ring 57, it is necessary to attach the water chamber cover 55 in a state in which the central axes are accurately aligned with the trunk portion 53. However, the accuracy with which the water chamber cover 55 is attached to the body 53 is largely dependent on the skill of the operator. In many cases, a sufficient working space cannot be secured around the oil cooler 51. Therefore, conventionally, there has been a problem that it is not easy to attach the water chamber cover 55 efficiently with the central axes accurately aligned with the body portion 53.

In the inspection work of various devices, not only oil coolers, it is required to assemble heavy parts efficiently and accurately after the inspection is completed. Proposed. In connection with this, several inventions and devices have already been disclosed.
For example, Patent Document 1 discloses an invention relating to a jig used in an open inspection work for a heat exchanger installed in a power plant or the like under the name “a lifting jig for a heat exchanger”.
The present invention is characterized in that the water chamber trunk suspended by the chain block is supported from below by a receiving member attached to a receiving beam whose height can be adjusted by a pantograph jack.
According to such a structure, the water chamber trunk removed from the heat exchanger can be held and transported horizontally during open inspection of the heat exchanger.

Patent Document 2 discloses a main shaft that supports an impeller (impeller) used in a large-sized blower or exhaust fan in a cantilever manner under the name of “impeller cantilever main shaft inspection jig and inspection method”. An invention relating to a jig used for inspection and an inspection method thereof is disclosed.
The present invention is characterized in that it has a hydraulic jack and is arranged between the lower end portion of the impeller and the bottom surface of the casing so that the impeller can be supported from below.
According to such a structure, even when the connection with the bearing is released, the cantilever main shaft of the impeller can be supported from below, so that the parts can be easily disassembled and inspected.

JP 2014-59083 A JP 2012-172599 A

  In the invention described in Patent Document 1, since it cannot be used in a place where a wheeled carriage or the like cannot be disposed between the flanged cover and the floor surface, it is provided with a flange like a horizontally installed oil cooler. It is not easy to move the flanged cover horizontally by accurately matching the central axes of the cylindrical device having the cover. Therefore, the present invention has a problem that it cannot be used for the open inspection work when the device is installed in a place where a sufficient work space cannot be secured around. In addition, since the structure of the jig becomes large, the manufacturing cost may increase.

  In addition, the inspection jig described in Patent Document 2 does not have a structure in which the supported components can be moved in the horizontal direction, so that the inspection jig is opened regardless of where the above-described equipment is installed. It is difficult to use for inspection work.

  The present invention has been made in response to such a conventional situation, and even when a cylindrical device having a flanged cover is installed in a place where a sufficient work space cannot be secured in the surroundings, An object of the present invention is to provide a flanged cover support frame that can be efficiently installed with the center axes accurately aligned with each other after the open inspection, and can be manufactured at low cost. .

  In order to achieve the above object, the first invention is a cover with a flange used for an operation of moving and attaching a cover having a second flange to a cylindrical body provided with a first flange at an open end. A support frame, wherein a jack on which an adjustment screw is vertically extendable, a base on which the jack is placed, a support means attached to an upper end of the adjustment screw, a first flange, And a rod-like body inserted into each bolt hole of the second flange.

  In the cover support frame with a flange having such a structure, the height of the support means for supporting the cover is adjusted by operating the jack, and the rod-shaped body is attached to the bolt holes of the first flange and the second flange. By inserting and communicating with each other, there is an effect that the central axes of the cover and the cylindrical body accurately coincide with each other. Moreover, when moving a cover, it has the effect | action that the above-mentioned positional relationship of the cover with respect to a cylindrical body is maintained by a rod-shaped body.

  According to a second aspect, in the first aspect, the support means is a long receiving member which is parallel to the horizontal direction and is installed so as to be able to abut against the lower side surface of the cover and to which the upper end of the adjusting screw is fixed. A pair of fasteners, a long retainer that is parallel to the receptacle and installed so as to be able to contact the upper side surface of the cover, and a male screw part on the outer peripheral surface and installed parallel to the vertical direction. The connecting tool is characterized in that the receiving tool and the presser are provided with insertion holes for inserting the ends of the pair of connecting bars in at least two places sandwiching the cover. It is.

  In the cover support frame with a flange having such a structure, in addition to the action of the first invention, both ends of the pair of connecting rods are inserted into the insertion holes of the receiving tool and the holding tool, respectively, and the males at both ends protruding from the insertion hole. By tightening the nut screwed into the threaded portion, the receiver and the presser are connected via the connecting rod, and by changing the fastening position of the nut, the distance between the receiver and the presser is easily adjusted. Has the effect of

According to a third invention, in the first invention or the second invention, the jack is a flat plate-like pedestal mounted on the base so as to be slidable along the upper surface, and the lower end is fixed to the pedestal vertically. And an adjusting screw installed in parallel to the direction.
In the cover support frame with a flange having such a structure, in addition to the action of the first invention or the second invention, the base of the jack is slid along the upper surface of the base while the cover is supported by the support means. And the cover moves horizontally.

According to a fourth aspect of the present invention, in the third aspect, the pedestal of the jack has a rectangular shape in plan view, and a pair of guide members having an L-shaped cross section are sandwiched between the pedestals on the upper surface of the base. In this state, they are installed so as to be parallel to each other.
In the cover support frame with flange having such a structure, in addition to the action of the third invention, the base is arranged so that the axial direction of the horizontally installed cylindrical body and the longitudinal direction of the pair of guide members are parallel to each other Then, it has the effect | action that the moving direction of a jack and a support means is controlled only to the direction parallel to the axial direction of a cylindrical body.

According to a fifth invention, in any one of the first to fourth inventions, the outer peripheral surface includes a leg portion having a male screw portion, and the base is provided with an insertion hole through which the leg portion is inserted. It is characterized by that.
In the cover support frame with a flange having such a structure, in addition to the action of any one of the first to fourth inventions, the leg portion is changed by changing the longitudinal position of the nut fastened to the leg portion. It has the effect | action that the height of the base of the part in which is installed changes.

  In the first invention, the cover can be accurately and efficiently attached to the cylindrical body by preventing the corner portion of the second flange from biting into the O-ring or the like. In addition, the present invention can be manufactured at low cost because of its simple structure.

  According to the second invention, in addition to the effects of the first invention, the distance between the receiving device and the holding device can be easily adjusted by operating the nut screwed to the connecting rod. There is an effect that the matching can be performed efficiently.

  According to the third invention, in addition to the effects of the first invention or the second invention, when a space for installing a truck or the like on which the jack is placed on the upper surface between the cover and the floor surface cannot be secured. Even if it exists, there exists an effect that a cover can be moved to a horizontal direction correctly.

  According to the fourth invention, in addition to the effect of the third invention, the base is arranged so that the axial direction of the horizontally installed cylindrical body and the longitudinal direction of the pair of guide members are parallel to each other and the support means. By adjusting the height with a jack, there is an effect that the cover can be moved in the horizontal direction in a state where the central axes are accurately matched with respect to the device.

  According to the fifth invention, in addition to the effect of any one of the first to fourth inventions, the fastening position of the nut with respect to the leg portion is adjusted even when there is a step in the place where the base is installed. As a result, the base can be installed in a horizontal state.

It is an external appearance perspective view of the Example of the cover support stand with a flange which concerns on embodiment of this invention. It is the flowchart which showed the procedure at the time of performing the attachment operation | work of a water chamber cover using the cover support stand with a flange of this invention. (A) And (b) is the longitudinal cross-sectional view which expanded and showed the edge part of the trunk | drum from which the water chamber cover was removed in the oil cooler. (A) And (b) is the figure which showed a mode that the water chamber cover was attached to the trunk | drum in FIG.3 (b). (A) is an external view of an oil cooler, (b) is an enlarged longitudinal sectional view of the water chamber cover and its peripheral part in FIG. (A), (c) is a plan view of a flange, (D) is a top view of an O ring and an annular plate. (A) And (b) is an enlarged view of the A section in FIG.5 (b).

  The flanged cover support frame of the present invention will be described with reference to FIGS. In the following description, a case where a water chamber cover is attached to the body of the oil cooler is taken as an example. However, the flanged cover support frame of the present invention is not limited to the oil cooler, and a flange is provided at the open end. The present invention can be applied to the case where the flanged cover is horizontally moved and attached to various provided cylindrical devices.

FIG. 1 is a perspective view showing an example of the appearance of a flanged cover support frame of the present invention. In addition, about the component already demonstrated using FIG.5 and FIG.6, the same code | symbol is attached | subjected and the description is abbreviate | omitted.
As shown in FIG. 1, the cover support frame 1 with a flange includes a jack 2 composed of a pedestal 2a and an adjusting screw 2b, a base 3 on which the jack 2 is installed, and a support means installed on the upper portion of the jack 2. 4 and a guide pipe 5 inserted through the body 53 and the bolt holes 53b and 55b of the flanges 53a and 55a of the water chamber cover 55 (refer to FIG. 5C for the bolt holes 53b; the same applies hereinafter). Yes. The pedestal 2a is made of a flat plate material having a rectangular shape in plan view, and the lower end is fixed to the pedestal 2a in a state where the adjustment screw 2b can be extended vertically upward. A support means 4 is attached to the upper end of the adjustment screw 2b. It has been.

  Further, an assembly comprising a base 13a having an H shape in a plan view and a pair of adjustment screws 13b and 13b which are erected on the base 13a and horizontally support a receiving tool 13c installed on the top. A gantry 13 is provided. In addition, a plurality of leg portions 13d each having a male screw portion on the outer peripheral surface are inserted into a plurality of insertion holes provided in the base 13a, and are fixed using nuts. That is, the built-in mount 13 has a structure that can be adjusted in level with the floor surface by changing the fastening position of the nut in the longitudinal direction of the leg portion 13d.

The support means 4 is parallel to the horizontal direction and is installed in such a manner that it can be brought into contact with the lower portion of the side surface of the water chamber cover 55. A long presser 7 installed so as to be able to come into contact with the upper part of the side surface of the water and a male screw part on the outer peripheral surface, and installed in parallel with the vertical direction with the water chamber cover 55 interposed therebetween. And a pair of connecting rods 8 and 8 for connecting the receiving tool 6 and the presser 7.
Further, the receiving tool 6 and the holding tool 7 are angle steels in which insertion holes for the connecting rod 8 are provided in the vicinity of both ends, and the connecting rod 8 fastens the nut 9 to the end portion inserted through the insertion hole. As a result, the holder 6 and the presser 7 are fixed. That is, the support means 4 has a structure in which the interval between the receiving tool 6 and the pressing tool 7 can be adjusted by changing the fastening location of the nut 9 in the longitudinal direction of the connecting rod 8.

  The base 3 is made of a flat plate material having a rectangular shape in plan view, and a pair of guide members 10 and 10 having an L-shaped cross section are interposed between the base 2a on the upper surface on which the base 2a of the jack 2 is placed. They are installed so as to be parallel to each other in a back-to-back state. In this case, the base 2a is guided so as to be slidable in the longitudinal direction along the back surfaces of the pair of guide members 10 and 10. Therefore, when the base 3 is arranged so that the longitudinal direction of the guide members 10, 10 is parallel to the cylindrical axis direction of the barrel 53 installed horizontally, the movement direction of the jack 2 and the support means 4 is the barrel 53. Since the height of the support means 4 is adjusted by the jack 2, the water chamber cover can be kept in a state in which the central axes are accurately aligned with the trunk portion 53. 55 can be moved in the horizontal direction.

In addition, a pair of leg portions 11, 11 having male screw portions on the outer peripheral surface are inserted into the base 3 through insertion holes provided in the vicinity of the end portion in the longitudinal direction of the guide member 10, and a nut 12 is used. Is fixed. That is, the leg part 11 can adjust the height of the end part of the base 3 by changing the fastening position of the nut 12 with respect to the longitudinal direction of the leg part 11.
Therefore, even if there is a step between the upper surface of the pedestal 52a and the floor surface of the support base 52, the base can be adjusted by adjusting the fastening positions of the nuts 12 and 12 with respect to the leg portions 11 and 11, respectively. 3 can be installed in a horizontal state.

Next, a method for attaching the water chamber cover 55 using the flanged cover support frame 1 of the present invention will be described with reference to FIGS.
FIG. 2 is a flowchart showing the procedure of the work. 3 (a) and 3 (b) are enlarged longitudinal sectional views showing the end of the body 53 from which the water chamber cover 55 is removed in the oil cooler 51, and FIG. 4 (a). 4B is a view showing a state in which the water chamber cover 55 is attached to the trunk portion 53 in FIG. 3B. 3 and 4 correspond to FIG. 5B.

  When the water chamber cover 55 is attached to the trunk portion 53 after checking the opening of the oil cooler 51, first, after inserting the O-ring 57 into the annular groove 56a of the flange 53a of the trunk portion 53 in step S1, as shown in FIG. In step S2, the annular plate 58 is mounted on the flange 53a of the trunk portion 53 so as to be inserted into the annular groove 56b (see FIG. 3A). Next, in step S3, the O-ring 57 is extrapolated to the tube plate 54, and in step S4, the level of the built-in mount 13 on the trunk 53 side and the floor surface is adjusted, and the flange 53a of the trunk 53 is removed. The receiver 13c of the built-in mount 13 is raised so that the two guide pipes 5 are arranged at the respective centers with respect to the bolt holes 53b at the two lower sides (see FIG. 3B).

  In step S5, the water chamber cover 55 is lifted using a chain block or the like, and the flanged cover support frame 1 is installed below the water chamber cover 55. At this time, the water chamber cover 55 is lowered by operating the chain block, and is arranged so as to be sandwiched from above and below by the receiver 6 and the presser 7. However, the base 3 is arranged so that the longitudinal direction of the guide member 10 is parallel to the axial direction of the trunk portion 53. Thus, in the flanged cover support frame 1 of the present invention, the distance between the receiving tool 6 and the holding tool 7 can be easily adjusted, so that the water chamber cover 55 can be efficiently aligned with the support means 4. .

  Next, in steps S6 to S7, after the two lower guide pipes 5 are inserted into the bolt holes 55b of the flange 55a to adjust the height of the water chamber cover 55, the adjustment screw 2b is operated to Make final fine adjustments. Further, in step S8, the other ends of the remaining two guide pipes 5 whose one ends are inserted into the bolt holes 53b of the flange 53a of the trunk portion 53 are respectively connected to the bolt holes 55b of the flange 55a corresponding to the bolt holes 53b of the flange 53a. Insert (see FIG. 4A). Thus, the water chamber cover 55 is disposed so that all of the bolt holes 55b of the flange 55a face each of the bolt holes 53b of the flange 53a, and the central axis of the water chamber cover 55 is that of the trunk portion 53. It is in a state of being completely coincident with the cylindrical axis.

  In the present embodiment, after performing fine adjustment of the tilt, the two guide pipes 5 are inserted into the bolt holes 55b on the lower side of the flange 55a for fine adjustment, and then further, the upper side of the flange 55a is further adjusted. The procedure is to insert the remaining two guide pipes 5 into the bolt holes 55b. However, after finely adjusting the tilt first, the upper and lower four guide pipes 5 may be inserted into the bolt holes 55b of the flange 55a. good.

  In step S9, the water chamber cover 55 is supported by the support means 4, and the pedestal 2a of the jack 2 is slid along the back surface of the pair of guide members 10 and 10 in a direction approaching the trunk portion 53, thereby The cover 55 is moved until the flange 55a comes into contact with the flange 53a of the body portion 53 (see FIG. 4B). At this time, since the four guide pipes 5 are inserted into the bolt holes 53b of the flange 53a and the bolt holes 55b of the flange 55a, the positional relationship between the flanges 53a and 55a and the central axis of the water chamber cover 55 and the trunk portion 53 The positional relationship between them does not collapse. That is, the guide pipe 5 maintains the state in which the bolt hole 53b and the bolt hole 55b face each other before and after the movement of the water chamber cover 55, and the central axis of the water chamber cover 55 coincides with the cylindrical axis of the trunk portion 53. It has the action. Thereby, the water chamber cover 55 can be accurately attached to the trunk portion 53.

In step S10, first, 4 to 8 bolts are diagonally attached and tightened to the flange 53a of the body 53, the flange 55a of the water chamber cover 55, and the bolt holes 53b and 55b. The pipe 5 is extracted, and the remaining bolts are inserted into the bolt holes 53 b and 55 b and fastened to fix the flange 55 a of the water chamber cover 55 to the flange 53 a of the trunk portion 53.
Then, in step S11, the cover support base 1 with a flange is removed.

As described above, in the flanged cover support base 1 of the present invention, even if the oil cooler 51 is installed in a place where a sufficient work space cannot be secured around the base 2a of the jack 2, Since the base 3 does not have wheels, the jack 2 and the base 3 can be installed below the water chamber cover 55.
Further, the jack 2 is operated to adjust the height of the water chamber cover 55 supported by the receptacle 6, and the guide pipe 5 is connected to the bolt hole 55 b of the flange 55 a of the water chamber cover 55 and the flange 53 a of the trunk portion 53. By inserting the bolt hole 53 b, the central axis of the water chamber cover 55 is exactly aligned with the cylindrical axis of the trunk portion 53.
Such a positional relationship of the water chamber cover 55 with respect to the trunk portion 53 is maintained by the guide pipe 5 when the water chamber cover 55 is moved by sliding the base 2 a of the jack 2 with respect to the base 3. Is done. Therefore, the O-ring 57 can be prevented from biting by the corners of the annular groove 56b of the flange 55a, and the water chamber cover 55 can be accurately and efficiently attached to the trunk portion 53.
Further, the flanged cover support frame 1 of the present invention can be manufactured at low cost because the structure of the base 2a, base 3 and support means 4 of the jack 2 is simple.

  In the present embodiment, the guide pipe 5 is inserted into the bolt holes 53b and 55b of the flanges 53a and 55a. However, since the guide pipe 5 is not necessarily a cylindrical body, for example, a solid rod shape is used instead of the guide pipe 5 The body can also be used. However, if the predetermined rigidity can be satisfied, the cylindrical body has an advantage that it is lighter and easier to handle than the solid rod-shaped body.

  INDUSTRIAL APPLICABILITY The present invention can be used in a cylindrical device having a flanged cover when the flanged cover is reinstalled after opening inspection.

  DESCRIPTION OF SYMBOLS 1 ... Cover support stand with a flange 2 ... Jack 2a ... Base 2b ... Adjustment screw 3 ... Base 4 ... Support means 5 ... Guide pipe 6 ... Receiving tool 7 ... Holding tool 8 ... Connecting rod 9 ... Nut 10 ... Guide member 11 ... Leg 12 ... Nut 13 ... Built-in stand 13a ... Base 13b ... Adjustment screw 13c ... Receiver 13d ... Leg 51 ... Oil cooler 52 ... Support base 52a ... Base 53 ... Body 53a ... Flange 53b ... Bolt hole 54 ... Tube plate 55 ... Water chamber cover 55a ... Flange 55b ... Bolt hole 56a, 56b ... Annular groove 57 ... O-ring 58 ... Annular plate

Claims (5)

A cover support frame with a flange used for an operation of horizontally moving and attaching a cover having a second flange to a cylindrical body provided with a first flange at an open end,
A jack on which the adjustment screw can be extended vertically upward;
A base on which the jack is placed on the upper surface;
A support means attached to the upper end of the adjustment screw;
A flanged cover support pedestal comprising: the first flange and a rod-like body inserted into each bolt hole of the second flange. The support means is
A long receiving member which is parallel to the horizontal direction and is installed so as to be in contact with the lower side surface of the cover and to which the upper end of the adjustment screw is fixed;
A long presser that is parallel to the receiver and is installed so as to be able to contact the upper side of the cover;
A pair of connecting rods having a male threaded portion on the outer peripheral surface and installed parallel to the vertical direction,
The said receiving tool and the said holding tool are provided with the insertion hole for respectively inserting the both ends of a pair of said connecting rod in at least 2 places which pinches | interposes the said cover. Cover support stand with flange.   The jack includes a flat plate-like pedestal mounted on the base so as to be slidable along the upper surface, and the adjusting screw having a lower end fixed to the pedestal and installed parallel to the vertical direction. The flanged cover support frame according to claim 1 or 2, wherein the cover support frame is provided with a flange. The pedestal of the jack has a rectangular shape in plan view,
4. A pair of guide members having an L-shaped cross section are installed on the upper surface of the base so as to be parallel to each other in a back-to-back state with the pedestal interposed therebetween. The cover support stand with a flange as described in 2. Provided with a leg portion having a male screw portion on the outer peripheral surface,
The flanged cover support frame according to any one of claims 1 to 4, wherein the base is provided with an insertion hole through which the leg portion is inserted.

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