CN110253480B - Mounting tool for welding seam sealing device of control rod driving mechanism - Google Patents
Mounting tool for welding seam sealing device of control rod driving mechanism Download PDFInfo
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- CN110253480B CN110253480B CN201910561266.6A CN201910561266A CN110253480B CN 110253480 B CN110253480 B CN 110253480B CN 201910561266 A CN201910561266 A CN 201910561266A CN 110253480 B CN110253480 B CN 110253480B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
- B25B27/0028—Tools for removing or installing seals
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C7/00—Control of nuclear reaction
- G21C7/06—Control of nuclear reaction by application of neutron-absorbing material, i.e. material with absorption cross-section very much in excess of reflection cross-section
- G21C7/08—Control of nuclear reaction by application of neutron-absorbing material, i.e. material with absorption cross-section very much in excess of reflection cross-section by displacement of solid control elements, e.g. control rods
- G21C7/12—Means for moving control elements to desired position
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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Abstract
The invention discloses an installation tool for a control rod driving mechanism welding seam sealing device, which comprises a support rod and a sealing device restraining part, wherein the sealing device restraining part comprises a telescopic device, a positioning table and a connecting column; at least two connecting columns are arranged; the upper end of each connecting column is fixed on the telescopic device or the stay bar; the positioning table is connected to the telescopic output end of the telescopic device; the positioning table is of a semi-annular structure, the stepped surface is semi-annular and extends along the circumferential direction of the positioning table, the axis of the positioning table is parallel to the movement direction of the telescopic output end, and the diameter of the lower end of the positioning table is smaller than that of the upper end of the positioning table; the positioning table is also provided with through holes with the number equal to that of the connecting columns, the hole openings at the lower ends of the through holes are positioned on the step surface, and the through holes are used as channels for the connecting columns to penetrate through the positioning table. The tool can be used for installing a welding seam sealing device of a control rod driving mechanism.
Description
Technical Field
The invention relates to the technical field of nuclear reactor sealing devices, in particular to an installation tool for a control rod driving mechanism welding seam sealing device.
Background
A Control Rod Drive Mechanism (CRDM) is one of key devices of a nuclear power plant, and weld leakage is easy to occur when the operation time of a sealing weld is prolonged along with the operation of a group according to the operation experience feedback of domestic and foreign nuclear power plants and the analysis of the inherent structural design, material design and service condition of the CRDM sealing weld.
Aiming at the leakage of the sealing welding seam or as a preventive measure, a corresponding sealing device is developed to effectively ensure the safety of the operation of the nuclear reactor. However, for a non-integrated stroke sleeve, the distance between the lower sealing weld of the upper stroke sleeve of the CRDM and the top end of the stroke sleeve is about 5400mm, meanwhile, dozens of stroke sleeves are generally densely distributed on the top cover of the pressure vessel, the center distance between the two stroke sleeves is only 300mm, and the sealing device cannot be reached by a person, so how to accurately install the sealing device on the lower sealing weld of the stroke sleeve is a technical problem to be solved by the person skilled in the art in the prior art.
Disclosure of Invention
In view of the above-mentioned technical problems that a person skilled in the art needs to solve in the prior art how to accurately install a sealing device to a sealing weld position at the lower part of a stroke sleeve in response to CRDM leakage or as leakage prevention, the present invention provides an installation tool for a welding seam sealing device of a control rod drive mechanism. The tool can be used for installing a welding seam sealing device of a control rod driving mechanism.
In order to solve the problems, the mounting tool for the welding seam sealing device of the control rod driving mechanism provided by the invention solves the problems through the following technical points: an installation tool for a welding seam sealing device of a control rod driving mechanism comprises a support rod and a sealing device restraining part connected to the lower end of the support rod, wherein the sealing device restraining part comprises a telescopic device, a positioning table and a connecting column, and the telescopic device is fixed at the lower end of the support rod;
the number of the connecting columns is at least two, the connecting columns are parallel to the support rods, and each connecting column is of a cylindrical structure with a downward free end;
the upper end of each connecting column is fixed on the telescopic device or the stay bar, and when the telescopic device is telescopic, the connecting columns are fixed relative to the stay bar;
the positioning table is connected to the telescopic output end of the telescopic device, and the movement direction of the telescopic output end is along the axis direction of the connecting column;
the positioning table is of a semi-annular structure, the side surface of the positioning table is provided with a step surface, the circumference of the positioning table is less than or equal to half of the circumference of a whole circular ring, the step surface is of a semi-annular structure, the left end and the right end of the step surface are respectively intersected with the left end and the right end of the positioning table, the step surface extends along the circumferential direction of the positioning table, the axis of the positioning table is parallel to the movement direction of the telescopic output end, and the diameter of the lower end of the positioning table is smaller than;
the positioning table is also provided with through holes with the number equal to that of the connecting columns, the hole openings at the lower ends of the through holes are positioned on the stepped surface, and the through holes are used as a channel for the connecting columns to pass through the positioning table.
For the leakage defect of the sealing weld of the CRDM upper stroke sleeve or the leakage risk caused by the defect, because the local part of the stroke sleeve at the position of the sealing weld is an expansion part relative to two sides, the corresponding processing mode can adopt: and a sealing ring is arranged around the defect, can adopt a graphite ring, provides a certain pretightening force through a sealing device, and presses and holds the sealing ring at the outer side of the stroke sleeve at the position of the sealing weld joint, so that the defect is isolated from the outside.
Specifically, sealing device includes backing ring, graphite ring, and backing ring, graphite ring all are the hemicyclic form to realize: the left and right parts of the two lining rings are spliced to obtain an annular structure around the axis of the stroke sleeve; the two graphite rings are spliced left and right to obtain an annular structure around the axis of the stroke sleeve, and the opening sides of the lining ring and the graphite ring face the stroke sleeve aiming at the single one of the lining ring and the graphite ring, so that the installation can be completed by the side face of the stroke sleeve. Further, the semicircular graphite ring can be arranged to comprise an upper layer and a lower layer, the upper layer and the lower layer are stacked, the upper layer is used for being attached to the side face of the stroke sleeve, and the lower layer is used for being attached to the lining ring, so that the sealing effect can be reliably achieved. Aiming at the pretightening force, flanges can be arranged on the upper side and the lower side of the expansion part, and the two flanges are tightened through bolts: the lowest position of the upper flange on the axis of the stroke sleeve is restrained by the step on the stroke sleeve, and when the bolt is pulled, the lower flange applies upward thrust to the lining ring to realize the compression of the graphite ring. Although the sealing structure which can be used for the CRDM under the condition of not influencing the structure of the CRDM is provided, the sealing structure is difficult to be installed on the premise of not adopting a special installation tool by considering the space position of the CRDM and the specific structure of the lining ring and the graphite ring.
In the scheme, the connecting columns are used for matching the positioning holes in the lining ring, the number of the connecting columns is equal to that of the positioning holes in the lining ring, the lining ring is provided with a plurality of positioning holes, the upper end face of the lining ring is provided with an orifice of the positioning holes, and the relative positions of the positioning holes are consistent with that of the connecting columns. The method comprises the following steps: the positioning table is a semi-annular structure with a stepped surface on the side surface and a perimeter less than or equal to the perimeter of a half of a whole circular ring, namely the positioning table is in a semi-annular shape less than or equal to a half of a whole circular ring; the semicircle is personally submitted to the ladder, and the ladder face also is the semicircle of less than or equal to half whole ring promptly, and the left side of ladder face is originated in the left side of location platform, and the right side of ladder face is crossing with the right side of location platform, the ladder face extends along the circumferential direction of location platform, and is like this, works as the spliced pole is inserting the locating hole in-process, the accessible spliced pole with the axis direction of location platform restraint for the grommet is located the flexible direction of telescoping device, and the friction that positive pressure produced between spliced pole and the locating hole lateral wall can realize the fixed of grommet and spliced pole, and the highest position of grommet for the location platform is injectd to the ladder face, when the installation grommet, at first by the downside of location platform, will be the graphite annulus centre gripping of semicircle between the ladder face of grommet and location platform.
When the sealing device is specifically installed, if the lower side of the lining ring is placed on the lower flange plate through the support rod, then the telescopic device stretches, in the process, the lining ring is kept in contact with the upper side of the lower flange plate, at the moment, the connecting column moves upwards relative to the positioning table, the step surface limits the upward movement of a combination body formed by the graphite ring and the lining ring along with the connecting column, so that the lining ring is separated from the connecting column, and the combination body can fall onto the lower flange plate; after the assembly on the other side of the stroke sleeve is mounted, the assembly of the sealing device on the CRDM can be completed by tightening the bolts between the lower flange plate and the upper flange plate. The semi-ring pore canal on the positioning table is used for realizing that the positioning table surrounds one side of the stroke sleeve in the whole assembly transfer process so as to reduce the requirement of the positioning table on the operation space. In particular preparation, the positioning table may be obtained by hollow step shaft cutting, the cutting being along an axial plane: the axis of the hollow step shaft is positioned on the tangent plane.
In conclusion, the scheme provides the tool for mounting the sealing device for the sealing weld of the control rod driving mechanism, the difficult problems of long-distance transmission and in-place mounting of the lining ring and the graphite ring in the sealing device in a narrow space are solved, and meanwhile, when the combined body is separated from the tool, the lining ring is fixed relative to the lower flange plate, so the tool also has the characteristic of high mounting and positioning precision of the sealing device. Meanwhile, the scheme is simple in structure and convenient to use. The scheme can also be used for transmitting and mounting other similar annular parts in a narrow space.
The further technical scheme is as follows:
as a technical scheme that the structure is simple, the reliability is high and the weight is light, the device is arranged as follows: the telescopic device is a cylinder, a piston rod of the cylinder extends out from the front end of the cylinder body, the rear end of the cylinder body is fixedly connected with the bottom of the supporting rod, the connecting column is connected to the cylinder body, and the positioning table is connected to the piston rod. This scheme is when concrete use, and the exit end of the corresponding pressurized air source intake pipe of configuration, intake pipe connects the valve, connects the air supply pipe on the valve, the air supply pipe with the cylinder be connected can. The valve is a control valve for controlling the working state of the cylinder or air inlet and outlet.
As technical personnel in this field, because the length of vaulting pole needs to set up to have several meters in this scheme, for convenient operation, preferably set up to the cylinder is concentric with the vaulting pole, if directly on being fixed in the cylinder body of cylinder with the spliced pole, on the location platform snap-on was in the piston rod, at this moment, because sealing device's mounted position department exists the expansion part on the stroke sleeve pipe of itself, so the side space of the stroke sleeve pipe that the cylinder occupied at this moment will exert an influence to the location of location platform and downside ring flange, based on above problem, set up to: the cylinder body is fixedly connected with the lower end of the cylinder body, and the piston rod is fixedly connected with the lower end of the cylinder body;
the connecting rods are parallel to the axis direction of the piston rod in the axis direction, the number of the connecting rods is equal to that of the connecting columns, the upper end of each connecting rod is fixed on the first fixing rod, and the lower end of each connecting rod is fixed with one connecting column;
the second fixing rod is also provided with a plurality of pore passages which penetrate through the upper end and the lower end of the second fixing rod, the number of the pore passages is equal to that of the connecting rods, each connecting rod penetrates through the second fixing rod through one pore passage, and each connecting rod is in clearance fit with the corresponding pore passage;
and a sleeve is sleeved on each connecting rod, the upper end of each sleeve is fixedly connected with the second fixing rod, and the lower end of each sleeve is fixedly connected with the positioning table. In this scheme, in fact through first locating lever and second locating lever, for the installation that realizes spliced pole, location platform provides an installation pole respectively, passes through simultaneously connecting rod and sleeve pipe for spliced pole and location platform can be for telescoping device downwardly extending, like this, combines location platform itself to be the semicircular structure characteristics, can make and pass through connecting rod and sleeve pipe make when the lower extreme of location platform and the contact of lower extreme ring flange, the telescoping device still is located the upside of the most that expands, like this, can make things convenient for sealing device's installation. Meanwhile, the concrete structural form also has the characteristics of good overall rigidity and convenience for keeping the position of the connecting column relative to the positioning table.
For the installation of convenient sealing device, set up to: the first fixing rod and the second fixing rod are parallel to each other, and the axial directions of the first fixing rod and the second fixing rod are perpendicular to the axial direction of the piston rod.
The location bench has three ladder face, and three ladder face is coaxial, and the diameter that is in the ladder face of upside is greater than the diameter that is in the ladder face of downside, the lower extreme of through-hole is located the ladder face that is in the upside, location bench medial surface shape warp in step with outside shape deformation. In this scheme, it warp to inject for the location platform medial surface shape synchronous with the outside shape, namely, the outside of location platform has three step, and the inboard also has three step, and like this, the location platform is thin shell class part in fact, like this, can effectively reduce the weight of location platform in order to make things convenient for the operation of this instrument. As mentioned above, the single-mount assembly actually includes three parts: the backing ring, conduct local upper strata of graphite ring, conduct local lower floor of graphite ring is injectd to including three ladder face, when specifically using, the ladder face of the top be used for with the laminating of graphite ring upside, two ladder faces of downside be used for respectively with conduct local of graphite ring lower floor, upper strata upper surface laminating, like this, through the locating platform can be so that have the power of constraining each other between the above three part, above power aims at avoiding above three part to take place the displacement and influence sealing device's cooperation precision in the transportation.
Under the condition that spliced pole quantity is as few as possible, for the stability of guaranteeing this instrument connection backing ring, the quantity of spliced pole is two, and one of them spliced pole all is located one of them one end of location platform in the cooperation position of location bench, and another spliced pole all is located the other end of location platform in the cooperation position of location bench.
In order to ensure the reliability of the connecting column for restraining the lining ring, and simultaneously, through the elastic deformation of the connecting column, the technical scheme that the influence of the connecting column on the connecting column and the positioning hole in the process of mutually matching the positioning hole is reduced is provided, and the connecting column is an elastic cylinder capable of changing the outer diameter through elastic deformation.
As a technical scheme which can verify the constraint reliability of the connecting column to the lining ring before the tool is matched with the specific lining ring, the tool is set as follows: still include experimental sleeve, experimental sleeve is tubular structure, and its hole is used for simulating the locating hole on the grommet: the size of the inner hole is consistent with that of the positioning hole in the lining ring, and the lining ring is inserted into the test sleeve through the connecting column, so that the matching reliability of the lining ring and the connecting column is verified.
The number of the test sleeves is equal to that of the connecting columns. This scheme aims at considering concrete parts machining precision, and the individual condition of differentiation that leads to takes place size change through using back spliced pole, locating hole individuality: a single test sleeve corresponds to a specific connecting column and is used for verifying the constraint capacity of the connecting column on a positioning hole with a specific size.
Specifically, the test sleeves are connected through steel wire ropes. This scheme of adoption, after each test sleeve embedding spliced pole, the mode of wire rope is drawn to the accessible, if in-process is drawn to certain pulling force down, spliced pole and test sleeve's cooperation relation is stable, can mark the spliced pole can reliably retrain the grommet, if the slippage condition takes place, then shows that the spliced pole has lost the restraint ability to the grommet.
The invention has the following beneficial effects:
in the scheme, the connecting columns are used for matching the positioning holes in the lining ring, the number of the connecting columns is equal to that of the positioning holes in the lining ring, the lining ring is provided with a plurality of positioning holes, the upper end face of the lining ring is provided with an orifice of the positioning holes, and the relative positions of the positioning holes are consistent with that of the connecting columns. The method comprises the following steps: the positioning table is a semi-annular structure with a stepped surface on the side surface and a perimeter less than or equal to the perimeter of a half of a whole circular ring, namely the positioning table is in a semi-annular shape less than or equal to a half of a whole circular ring; the semicircle is personally submitted to the ladder, and the ladder face also is the semicircle of less than or equal to half whole ring promptly, and the left side of ladder face is originated in the left side of location platform, and the right side of ladder face is crossing with the right side of location platform, the ladder face extends along the circumferential direction of location platform, and is like this, works as the spliced pole is inserting the locating hole in-process, the accessible spliced pole with the axis direction of location platform restraint for the grommet is located the flexible direction of telescoping device, and the friction that positive pressure produced between spliced pole and the locating hole lateral wall can realize the fixed of grommet and spliced pole, and the highest position of grommet for the location platform is injectd to the ladder face, when the installation grommet, at first by the downside of location platform, will be the graphite annulus centre gripping of semicircle between the ladder face of grommet and location platform.
When the sealing device is specifically installed, if the lower side of the lining ring is placed on the lower flange plate through the support rod, then the telescopic device stretches, in the process, the lining ring is kept in contact with the upper side of the lower flange plate, at the moment, the connecting column moves upwards relative to the positioning table, the step surface limits the upward movement of a combination body formed by the graphite ring and the lining ring along with the connecting column, so that the lining ring is separated from the connecting column, and the combination body can fall onto the lower flange plate; after the assembly on the other side of the stroke sleeve is mounted, the assembly of the sealing device on the CRDM can be completed by tightening the bolts between the lower flange plate and the upper flange plate. The semi-ring pore canal on the positioning table is used for realizing that the positioning table surrounds one side of the stroke sleeve in the whole assembly transfer process so as to reduce the requirement of the positioning table on the operation space. In particular preparation, the positioning table may be obtained by hollow step shaft cutting, the cutting being along an axial plane: the axis of the hollow step shaft is positioned on the tangent plane.
In conclusion, the scheme provides the tool for mounting the sealing device for the sealing weld of the control rod driving mechanism, the difficult problems of long-distance transmission and in-place mounting of the lining ring and the graphite ring in the sealing device in a narrow space are solved, and meanwhile, when the combined body is separated from the tool, the lining ring is fixed relative to the lower flange plate, so the tool also has the characteristic of high mounting and positioning precision of the sealing device. Meanwhile, the scheme is simple in structure and convenient to use. The scheme can also be used for transmitting and mounting other similar annular parts in a narrow space.
Drawings
FIG. 1 is a schematic diagram of a top portion of a prior art nuclear reactor pressure vessel;
FIG. 2 is a top view of the structure shown in FIG. 1;
FIG. 3 is a schematic structural view of a seal at a seal weld location on a nuclear reactor CRDM;
FIG. 4 is a perspective view of a backing ring of the seal configuration of FIG. 3;
FIG. 5 is a top view of the backing ring of FIG. 4;
FIG. 6 is a schematic structural view of the graphite ring of FIG. 3;
FIG. 7 is a schematic structural view of an embodiment of a mounting tool for a CRDM weld seal according to the present invention;
FIG. 8 is a schematic view of a positioning table in an embodiment of a tool for installing a CRDM weld seal according to the present invention;
FIG. 9 is a schematic view of a positioning table in an embodiment of the installation tool for a CRDM weld sealing apparatus according to the present invention, which differs from FIG. 8 in that the inner deformation and the outer deformation are synchronized;
FIG. 10 is a schematic diagram of a positioning table in an embodiment of the installation tool for a CRDM weld sealing apparatus according to the present invention, the schematic diagram being a top or bottom view of the structure shown in FIG. 9.
The labels in the figure are respectively: 1. stroke sleeve pipe, 2, sealing weld, 3, pressure vessel, 4, graphite ring, 5, backing ring, 6, locating hole, 7, lower floor, 8, upper strata, 9, intake pipe, 10, valve, 11, air supply pipe, 12, vaulting pole, 13, telescoping device, 14, first dead lever, 15, second dead lever, 16, connecting rod, 17, location platform, 18, spliced pole, 19, experimental sleeve, 20, sleeve pipe, 21, the ladder face, 22, through-hole.
Detailed Description
The present invention will be described in further detail with reference to the following examples, but the present invention is not limited to the following examples:
example 1:
as shown in fig. 1 to 10, an installation tool for a control rod drive mechanism weld sealing device comprises a support rod 12 and a sealing device constraint part connected to the lower end of the support rod 12, wherein the sealing device constraint part comprises a telescopic device 13, a positioning table 17 and a connecting column 18, and the telescopic device 13 is fixed at the lower end of the support rod 12;
at least two connecting columns 18 are arranged, the connecting columns 18 are all parallel to the support rods 12, and each connecting column 18 is of a cylindrical structure with a downward free end;
the upper end of each connecting column 18 is fixed on the telescopic device 13 or the stay bar 12, and when the telescopic device 13 is telescopic, the position of each connecting column 18 is fixed relative to the stay bar 12;
the positioning table 17 is connected to the telescopic output end of the telescopic device 13, and the movement direction of the telescopic output end is along the axial direction of the connecting column 18;
the positioning table 17 is a semi-annular structure with a stepped surface 21 on the side surface and a circumference less than or equal to half of the circumference of a whole circular ring, the stepped surface 21 is a semi-annular structure with left and right ends respectively intersected with the left and right ends of the positioning table 17, the stepped surface 21 extends along the circumferential direction of the positioning table 17, the axis of the positioning table 17 is parallel to the movement direction of the telescopic output end, and the diameter of the lower end of the positioning table 17 is less than that of the upper end;
the positioning table 17 is further provided with through holes 22 with the number equal to that of the connecting columns 18, the hole openings at the lower ends of the through holes 22 are located on the stepped surface, and each through hole 22 is used as a channel for enabling the connecting column 18 to penetrate through the positioning table 17.
For the leakage defect of the sealing weld 2 of the CRDM upper stroke sleeve 1 or the leakage risk caused by the defect, because the local part of the stroke sleeve 1 at the position of the sealing weld 2 is an expansion part relative to two sides, the corresponding processing mode can adopt: and a sealing ring is arranged around the defect, the sealing ring can adopt a graphite ring 4, a certain pretightening force is provided through a sealing device, and the sealing ring is pressed and held at the outer side of the stroke sleeve 1 at the position of the sealing welding line 2, so that the defect is isolated from the outside.
Specifically, sealing device includes backing ring 5, graphite ring 4, and backing ring 5, graphite ring 4 all are the hemicyclic form to realize: the two lining rings 5 are spliced left and right to obtain an annular structure around the axis of the stroke sleeve 1; the two graphite rings 4 are spliced left and right to obtain an annular structure around the axis of the stroke sleeve 1, and the opening sides of the lining ring 5 and the graphite ring 4 face the stroke sleeve 1 for a single one of the lining ring and the graphite ring, so that the installation can be completed by the side face of the stroke sleeve 1. Further, the graphite ring 4 in the semi-annular shape may be configured to include an upper layer 8 and a lower layer 7, and the upper layer 8 and the lower layer 7 are stacked, for example, the upper layer 8 is configured to be attached to the side surface of the stroke sleeve 1, and the lower layer 7 is configured to be attached to the liner ring 5, so that the sealing effect can be reliably achieved. Aiming at the pretightening force, flanges can be arranged on the upper side and the lower side of the expansion part, and the two flanges are tightened through bolts: the lowest position of the upper flange on the axis of the stroke sleeve 1 is restrained by the step on the stroke sleeve 1, and when the bolt is pulled, the lower flange applies upward thrust to the lining ring 5 to realize the compression of the graphite ring 4. Although the sealing structure which can be used for the CRDM under the condition of not influencing the structure of the CRDM is provided, the liner ring 5 and the graphite ring 4 have specific structures in consideration of the spatial position of the CRDM, and the sealing structure is difficult to be installed on the premise of not adopting a special installation tool.
In the scheme, the connecting columns 18 are used for matching the positioning holes 6 on the lining ring 5, the number of the connecting columns 18 is equal to that of the positioning holes 6 on the lining ring 5, the lining ring 5 is provided with a plurality of positioning holes 6, the upper end face of the lining ring 5 is provided with an orifice of the positioning holes 6, and the relative positions of the positioning holes 6 are consistent with that of the connecting columns 18. The method comprises the following steps: the positioning table 17 is a semi-annular structure with a stepped surface 21 on the side surface and a circumference less than or equal to the circumference of a half of a whole circular ring, namely the positioning table 17 is in a semi-annular shape less than or equal to a half of a whole circular ring; the step surface 21 is in a semi-ring shape, namely the step surface is also in a semi-ring shape which is less than or equal to one half of a whole circular ring, the left side of the step surface 21 starts from the left side of the positioning table 17, the right side of the step surface 21 is intersected with the right side of the positioning table 17, the stepped surface 21 extends in the circumferential direction of the positioning table 17, so that, during insertion of the connection post 18 into the positioning hole 6, can be restrained by the connecting column 18 and the positioning table 17 that the axial direction of the liner ring 5 is positioned in the telescopic direction of the telescopic device 13, the friction force generated by positive pressure between the connecting column 18 and the side wall of the positioning hole 6 can realize the fixation of the liner ring 5 and the connecting column 18, and the stepped surface limits the highest position of the liner ring 5 relative to the positioning table 17, when the backing ring 5 is attached, the graphite ring 4 having a semi-annular shape is first sandwiched between the backing ring 5 and the step surface of the positioning table 17 from below the positioning table 17.
When the sealing device is specifically installed, for example, the lower side of the liner ring 5 is placed on the lower flange plate through the support rods 12, then the telescopic device 13 is telescopic, in the process, the liner ring 5 is kept in contact with the upper side of the lower flange plate, at the moment, the connection column 18 moves upwards relative to the positioning table 17, the step surface limits the upward movement of a combination body formed by the graphite ring 4 and the liner ring 5 along with the connection column 18, so that the liner ring 5 is separated from the connection column 18, and the combination body can fall onto the lower flange plate; after the assembly on the other side of the stroke sleeve 1 is mounted, the assembly of the sealing device on the CRDM can be completed by tightening the bolts between the lower flange and the upper flange. The semi-ring hole on the positioning table 17 is used for realizing that the positioning table 17 surrounds one side of the stroke sleeve 1 in the whole combination transferring process so as to reduce the requirement of the positioning table 17 on the operation space. In particular preparation, the positioning table 17 may be obtained by hollow step shaft cutting, which is cutting along an axial plane: the axis of the hollow step shaft is positioned on the tangent plane.
In conclusion, the scheme provides the tool for mounting the sealing device for the control rod driving mechanism sealing weld joint 2, the difficult problems of long-distance transmission and in-place mounting of parts of the lining ring 5 and the graphite ring 4 in a narrow space in the sealing device are solved, and meanwhile, when the combined body is separated from the tool, the lining ring 5 is fixed relative to the flange plate on the lower side, so the tool also has the characteristic of high mounting and positioning precision of the sealing device. Meanwhile, the scheme is simple in structure and convenient to use. The scheme can also be used for transmitting and mounting other similar annular parts in a narrow space.
Example 2:
the present embodiment is further limited on the basis of embodiment 1, and as shown in fig. 1 to 10, as a technical solution with simple structure, high reliability and light weight, the present embodiment is configured as follows: the telescopic device 13 is a cylinder, a piston rod of the cylinder extends out from the front end of the cylinder body, the rear end of the cylinder body is fixedly connected with the bottom of the support rod 12, the connecting column 18 is connected to the cylinder body, and the positioning table 17 is connected to the piston rod. When this scheme is at concrete use, the exit end of the corresponding pressurized air source intake pipe 9 of configuration, intake pipe 9 connects valve 10, connects air supply pipe 11 on the valve 10, air supply pipe 11 and cylinder be connected can. The valve 10 is a control valve for controlling the working state of the cylinder or air inlet and outlet.
As the technical personnel in this field, because the length of the stay bar 12 needs to be set to have several meters, for convenient operation, it is preferable to set the cylinder to be concentric with the stay bar 12, if the connecting column 18 is directly fixed on the cylinder body of the cylinder, the positioning table 17 is directly fixed on the piston rod, at this moment, because there is a swelling part at the installation position of the sealing device on the stroke sleeve 1 itself, the side space of the stroke sleeve 1 occupied by the cylinder will affect the positioning of the positioning table 17 and the lower flange, based on the above problems, it is set as follows: the cylinder is characterized by further comprising a first fixing rod 14 and a second fixing rod 15, wherein the first fixing rod 14 is fixedly connected with the lower end of the cylinder body, and the second fixing rod 15 is fixedly connected with the lower end of the piston rod;
the piston rod fixing device further comprises connecting rods 16, the axial direction of each connecting rod 16 is parallel to the axial direction of the piston rod, the number of the connecting rods 16 is equal to that of the connecting columns 18, the upper end of each connecting rod 16 is fixed on the first fixing rod 14, and the lower end of each connecting rod 16 is fixed with one connecting column 18;
the second fixing rod 15 is also provided with a plurality of pore passages penetrating through the upper end and the lower end of the second fixing rod 15, the number of the pore passages is equal to that of the connecting rods 16, each connecting rod 16 penetrates through the second fixing rod 15 through one pore passage, and each connecting rod 16 is in clearance fit with the corresponding pore passage;
each connecting rod 16 is sleeved with a sleeve 20, the upper end of each sleeve 20 is fixedly connected with the second fixing rod 15, and the lower end of each sleeve 20 is fixedly connected with the positioning table 17. In this scheme, in fact through first locating lever and second locating lever, for the installation that realizes spliced pole 18, location platform 17 provides an installation pole respectively, passes through simultaneously connecting rod 16 and sleeve pipe 20 for spliced pole 18 can extend downwards for telescoping device 13 with location platform 17, like this, combines location platform 17 of own to be the semicircular structural feature, can make and pass through connecting rod 16 and sleeve pipe 20 make when the lower extreme of location platform 17 contacts with the lower extreme ring flange, telescoping device 13 still is located the upside of most of expanding, like this, can make things convenient for sealing device's installation. Meanwhile, the specific structural form also has the characteristics of good overall rigidity and convenience in keeping the position of the connecting column 18 relative to the positioning table 17.
Example 3:
this embodiment is further limited on the basis of embodiment 1, and as shown in fig. 1 to 10, to facilitate the installation of the sealing device, the following are provided: the first fixing rod 14 and the second fixing rod 15 are parallel to each other, and the axial directions of the first fixing rod 14 and the second fixing rod 15 are both perpendicular to the axial direction of the piston rod.
Have three ladder faces on the location platform 17, and three ladder faces are coaxial, and the diameter that is in the ladder face of upside is greater than the diameter that is in the ladder face of downside, the lower extreme of through-hole 22 is located the ladder face that is in the upside, location platform 17 medial surface shape warp in step with outside shape deformation. In the scheme, the shape deformation of the inner side surface of the positioning table 17 is defined to be synchronous with the shape deformation of the outer side, namely, the outer side of the positioning table 17 is provided with three steps, and the inner side of the positioning table 17 is also provided with three steps, so that the positioning table 17 is actually a thin-shell part, and the weight of the positioning table 17 can be effectively reduced to facilitate the operation of the tool. As mentioned above, the single-mount assembly actually includes three parts: backing ring 5, conduct local upper strata 8 of graphite ring 4, conduct the local lower floor 7 of graphite ring is injectd to including three ladder face, and when specifically using, the ladder face of the top side be used for with the laminating of 4 upsides of graphite ring, two ladder faces of downside be used for respectively with conduct graphite ring 4 is local lower floor 7, the laminating of 8 upper surfaces on the upper strata, like this, through locating platform 17 can be so that have the power of constraining each other between the above three part, and above power aims at avoiding above three part to take place the displacement and influence sealing device's cooperation precision in the transportation.
In order to ensure the stability of the tool for connecting the liner ring 5 with the connecting columns 18, the number of the connecting columns 18 is two, the matching position of one connecting column 18 on the positioning table 17 is located at one end of the positioning table 17, and the matching position of the other connecting column 18 on the positioning table 17 is located at the other end of the positioning table 17.
In order to ensure the reliability of the connecting column 18 for restraining the liner ring 5 and reduce the influence of the connecting column 18 on the connecting column 18 and the positioning hole 6 in the process of mutually matching the positioning holes 6 through the elastic deformation of the connecting column 18, the connecting column 18 is an elastic cylinder capable of changing the outer diameter through elastic deformation.
Example 4:
the present embodiment is further limited on the basis of embodiment 1, and as shown in fig. 1 to 10, as a technical solution for verifying the constraint reliability of the connection column 18 to the liner ring 5 before the tool is matched with the specific liner ring 5, the following is set: the test sleeve 19 is of a tubular structure, and the inner hole of the test sleeve 19 is used for simulating the positioning hole 6 on the lining ring 5: the size of the inner hole is consistent with that of the positioning hole 6 in the lining ring 5, and the lining ring 5 and the connecting column 18 are verified to be matched in reliability by inserting the connecting column 18 into the test sleeve 19.
The number of test sleeves 19 is equal to the number of connecting columns 18. This scheme aims at considering concrete parts machining precision, and the condition of the individual differentiation that leads to takes place size change through using back spliced pole 18, 6 individuals of locating hole: a single trial sleeve 19 corresponds to a particular attachment post 18 for verifying the ability of the attachment post 18 to constrain a specifically sized alignment hole 6.
Specifically, the test sleeves 19 are connected through a steel wire rope. By adopting the scheme, after each test sleeve 19 is embedded into the connecting column 18, the steel wire rope can be pulled through the mode, if the process of pulling under certain pulling force is stable, the matching relation between the connecting column 18 and the test sleeve 19 can be stable, the fact that the connecting column 18 can lean against the constraint lining ring 5 can be marked, and if the slipping condition occurs, the fact that the connecting column 18 loses the constraint capacity on the lining ring 5 is shown.
The foregoing is a more detailed description of the present invention in connection with specific preferred embodiments thereof, and it is not intended that the specific embodiments of the present invention be limited to these descriptions. For those skilled in the art to which the invention pertains, other embodiments that do not depart from the gist of the invention are intended to be within the scope of the invention.
Claims (10)
1. The mounting tool for the welding seam sealing device of the control rod driving mechanism comprises a support rod (12) and a sealing device restraining part connected to the lower end of the support rod (12), and is characterized in that the sealing device restraining part comprises a telescopic device (13), a positioning table (17) and a connecting column (18), and the telescopic device (13) is fixed to the lower end of the support rod (12);
at least two connecting columns (18) are arranged, the connecting columns (18) are parallel to the support rods (12), and each connecting column (18) is of a cylindrical structure with a downward free end;
the upper end of each connecting column (18) is fixed on the telescopic device (13) or the stay bar (12), and when the telescopic device (13) is telescopic, the connecting columns (18) are fixed relative to the stay bar (12);
the positioning table (17) is connected to the telescopic output end of the telescopic device (13), and the movement direction of the telescopic output end is along the axial direction of the connecting column (18);
the positioning table (17) is of a semi-annular structure, the side surface of the positioning table is provided with a step surface (21), the circumference of the positioning table is smaller than or equal to half of the circumference of a whole circular ring, the step surface (21) is of a semi-annular structure, the left end and the right end of the step surface are respectively intersected with the left end and the right end of the positioning table, the step surface (21) extends along the circumferential direction of the positioning table (17), the axis of the positioning table (17) is parallel to the movement direction of the telescopic output end, and the diameter of the lower end of the positioning table (17) is smaller than that;
the positioning table (17) is also provided with through holes (22) with the number equal to that of the connecting columns (18), the hole openings at the lower ends of the through holes (22) are positioned on the stepped surface (21), and the through holes (22) are used as a channel for enabling the connecting columns (18) to penetrate through the positioning table (17).
2. The mounting tool for the crdm weld sealing device according to claim 1, wherein the telescopic device (13) is a cylinder, a piston rod of the cylinder extends from a front end of the cylinder body, a rear end of the cylinder body is fixedly connected with a bottom of the stay bar (12), the connecting column (18) is connected to the cylinder body, and the positioning table (17) is connected to the piston rod.
3. The mounting tool for the crdm weld sealing apparatus according to claim 2, further comprising a first fixing rod (14) and a second fixing rod (15), wherein the first fixing rod (14) is fixedly connected to the lower end of the cylinder, and the second fixing rod (15) is fixedly connected to the lower end of the piston rod;
the piston rod fixing device is characterized by further comprising connecting rods (16) with the axis direction parallel to the axis direction of the piston rod, the number of the connecting rods (16) is equal to that of the connecting columns (18), the upper end of each connecting rod (16) is fixed on the first fixing rod (14), and the lower end of each connecting rod (16) is fixed with one connecting column (18);
the second fixing rod (15) is also provided with a plurality of pore channels penetrating through the upper end and the lower end of the second fixing rod (15), the number of the pore channels is equal to that of the connecting rods (16), each connecting rod (16) penetrates through the second fixing rod (15) through one pore channel, and each connecting rod (16) is in clearance fit with the corresponding pore channel;
each connecting rod (16) is sleeved with a sleeve (20), the upper end of each sleeve (20) is fixedly connected with the second fixing rod (15), and the lower end of each sleeve (20) is fixedly connected with the positioning table (17).
4. The mounting tool for the crdm weld sealing apparatus according to claim 3, wherein the first fixing rod (14) and the second fixing rod (15) are parallel to each other, and the axial directions of the first fixing rod (14) and the second fixing rod (15) are perpendicular to the axial direction of the piston rod.
5. The mounting tool for the crdm weld sealing apparatus according to claim 1, wherein the positioning table (17) has three stepped surfaces (21), the three stepped surfaces (21) are coaxial, the diameter of the stepped surface (21) at the upper side is larger than that of the stepped surface at the lower side, and the lower end of the through hole (22) is located on the stepped surface (21) at the upper side; the shape deformation of the inner side of the positioning table (17) is synchronous with the shape deformation of the outer side.
6. The mounting tool for the crdm weld sealing device according to claim 1, wherein the number of the connecting columns (18) is two, and the fitting position of one connecting column (18) on the positioning table (17) is located at one end of the positioning table (17), and the fitting position of the other connecting column (18) on the positioning table (17) is located at the other end of the positioning table (17).
7. The installation tool for a crdm weld seal as set forth in claim 1, wherein the connecting columns (18) are each a resilient cylinder capable of changing an outer diameter by elastic deformation.
8. The installation tool for the crdm weld seal according to claim 1, further comprising a test sleeve (19), wherein the test sleeve (19) is a tubular structure, and the inner hole of the test sleeve is used for simulating a positioning hole (6) on the backing ring (5): the size of the inner hole is consistent with that of the positioning hole (6) in the bushing ring (5), and the bushing ring (5) and the connecting column (18) are verified to be matched in reliability by inserting the connecting column (18) into the test sleeve (19).
9. The installation tool for a crdm weld seal as set forth in claim 8, wherein the number of the test sleeves (19) is equal to the number of the connection columns (18).
10. The control rod drive mechanism weld seal installation tool as set forth in claim 9, wherein the test sockets (19) are connected to each other by a wire rope.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910561266.6A CN110253480B (en) | 2019-06-26 | 2019-06-26 | Mounting tool for welding seam sealing device of control rod driving mechanism |
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| CN201910561266.6A CN110253480B (en) | 2019-06-26 | 2019-06-26 | Mounting tool for welding seam sealing device of control rod driving mechanism |
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| CN110253480B true CN110253480B (en) | 2020-12-04 |
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|---|---|
| CN110253480A (en) | 2019-09-20 |
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