CN219472322U - Special tool for inverted maintenance of pump body - Google Patents
Special tool for inverted maintenance of pump body Download PDFInfo
- Publication number
- CN219472322U CN219472322U CN202320281208.XU CN202320281208U CN219472322U CN 219472322 U CN219472322 U CN 219472322U CN 202320281208 U CN202320281208 U CN 202320281208U CN 219472322 U CN219472322 U CN 219472322U
- Authority
- CN
- China
- Prior art keywords
- pump body
- pump
- screw jack
- support
- special tool
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 238000012423 maintenance Methods 0.000 title claims abstract description 30
- 230000000149 penetrating effect Effects 0.000 claims abstract description 14
- 238000002347 injection Methods 0.000 claims description 9
- 239000007924 injection Substances 0.000 claims description 9
- 239000007921 spray Substances 0.000 claims description 9
- 238000003466 welding Methods 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 229910001369 Brass Inorganic materials 0.000 claims description 3
- 239000010951 brass Substances 0.000 claims description 3
- 239000002699 waste material Substances 0.000 abstract description 2
- 238000005259 measurement Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 208000025962 Crush injury Diseases 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
-
- 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
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model provides a special tool for pump body inverted maintenance, which is used on a pump body composed of an impeller and a Chinese myer shell and comprises an upright maintenance bracket and a screw jack; the vertical overhaul support comprises a support plate, a plurality of support legs and a base; the supporting plate is annular and comprises a top surface, a bottom surface, an annular hole penetrating through the top surface and the bottom surface and used for penetrating through the pump shaft, and a plurality of through holes penetrating through the top surface and the bottom surface and used for fixing the Chinese mythole; the top surface of the supporting plate faces the mythology shell; a plurality of support legs are fixed on the bottom surface of the support plate; the base is fixed with the support legs and is arranged away from the support plate, and is positioned below the annular hole; the screw jack is arranged on the base and is positioned under the annular hole, and a movable height for jacking the pump shaft is reserved between the screw jack and the pump shaft when the screw jack and the Chinese myer shell are fixed on the supporting plate. The utility model has simple structure and convenient operation, and can solve the problems of time and labor waste, low precision and the like of the jacking shaft in the existing vertical overhaul mode.
Description
Technical Field
The utility model relates to the technical field of pump body overhaul, in particular to a special tool for pump body inverted overhaul.
Background
In the comprehensive disassembly process of the containment spray pump and the low-pressure injection pump for the refueling overhaul of the nuclear power unit, the axial displacement of the pump rotor shafting relative to the stationary volute needs to be measured for a plurality of times. However, as shown in fig. 1, in the containment spray pump and the low-pressure injection pump, because the pin positioning is adopted between the part impeller T2 and the volute casing T1, the front end of which is connected with the pump shaft T3, the common horizontal maintenance method is easy to cause the faults of pin crush injury, insufficient installation or scraping and jamming of the dynamic and static rotors after reinstallation.
In order to solve the problems of the horizontal maintenance, a vertical maintenance mode is generally adopted. However, the existing vertical maintenance mode generally adopts a screw rod jacking mode to be matched with the axial clearance measurement of the pump rotor, and the problems that the jacking is time-consuming and labor-consuming and the precision is not high exist.
Therefore, the existing vertical maintenance mode is necessary to be improved, so that the problems that the top shaft is time-consuming and labor-consuming, the precision is low and the like are solved, and the pin installation precision between the impeller and the volute and the coaxiality of the impeller volute after maintenance are improved.
Disclosure of Invention
The technical problem to be solved by the embodiment of the utility model is to provide a special tool for pump body inverted maintenance, which has a simple structure and convenient operation, can overcome the problems of time and labor waste, low precision and the like of a top shaft in the existing vertical maintenance mode, and is beneficial to improving the pin installation precision between an impeller and a volute and the coaxiality of the impeller volute after maintenance.
In order to solve the technical problems, the embodiment of the utility model provides a special tool for inverted maintenance of a pump body, which is used for the pump body consisting of an impeller and a Chinese Wa shell and comprises a vertical maintenance bracket and a screw jack; wherein,,
the vertical overhaul support comprises a support plate, a plurality of support legs and a base; the support plate is annular and comprises a top surface, a bottom surface, an annular hole penetrating through the top surface and the bottom surface and used for penetrating into a pump shaft connected with the front end of the impeller, and a plurality of through holes penetrating through the top surface and the bottom surface and used for fixing the Chinese art shell; the top surface of the supporting plate faces the Chinese mythology shell; the bottom surface of the supporting plate is fixed with the supporting legs; the base and the supporting legs are fixed together, are close to one end of the supporting legs far away from the supporting plate, and are positioned below the annular hole;
the screw jack is arranged on the base and is positioned right below the annular hole, and a movable height for jacking the pump shaft is reserved between the screw jack and the pump shaft when the screw jack and the Chinese myer shell are fixed on the supporting plate.
Wherein, also include the adjusting pad; the adjusting pad is arranged above the screw jack and is positioned between the screw jack and the pump shaft.
Wherein, the adjusting pad is made of brass.
Wherein the supporting plate is in a circular ring shape; the annular hole is a hollow round hole.
The four supporting legs are fixed on the bottom surface of the supporting plate at intervals of 90 degrees.
Wherein the supporting plate, the four supporting legs and the base are all made of steel materials;
wherein,,
the supporting plate and the four supporting legs are fixed in a welding mode;
the four supporting legs and the base are fixed in a welding mode.
The support plate and the Chinese mythole are fixed by penetrating bolts into each through hole and matching with corresponding nuts.
The pump body is a pump body of a nuclear containment spray pump or a low-pressure safety injection pump.
The embodiment of the utility model has the following beneficial effects:
the special tool comprises the vertical overhaul support and the screw jack, and is installed on the base of the vertical overhaul support and located under the annular hole, and the movable height top pump shaft is flexibly adjusted to meet the requirement of axial clearance measurement of the pump rotor during overhaul.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are required in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that it is within the scope of the utility model to one skilled in the art to obtain other drawings from these drawings without inventive faculty.
FIG. 1 is a schematic plan view of a pump body of a prior art containment spray pump or low pressure safety injection pump;
fig. 2 is a schematic plan view of a special tool for pump body inverted maintenance in the embodiment of the utility model when the special tool is applied to pump body maintenance of a containment spray pump or a low-pressure safety injection pump;
FIG. 3 is a top view of the neutral service bracket of FIG. 2;
fig. 4 is a front view of the neutral service bracket of fig. 2.
Detailed Description
The present utility model will be described in further detail with reference to the accompanying drawings, for the purpose of making the objects, technical solutions and advantages of the present utility model more apparent.
Fig. 2 to fig. 4 show a special tool for inverted maintenance of a pump body, which is provided in the embodiment of the present utility model, and is used for a pump body composed of an impeller T2 and a liner T1, wherein the pump body is a pump body of a nuclear containment spray pump or a low-pressure injection pump; wherein,,
the special tool comprises a vertical overhaul support 1 and a screw jack 2;
the vertical overhaul stand 1 comprises a supporting plate 11, a plurality of supporting legs 12 and a base 13; the supporting plate 11 is an annular structure (such as a circular ring) made of steel, and comprises a top surface 111, a bottom surface 112, an annular hole 113 (such as a hollow circular hole) penetrating through the top surface 111 and the bottom surface 112 and used for penetrating into a pump shaft T3 connected with the front end of the impeller T2, and a plurality of through holes 114 penetrating through the top surface 111 and the bottom surface 112 and used for fixing the Chinese mythic shell T1 (for example, the mode of penetrating a bolt into each through hole 114 and matching with a corresponding nut is used for fixing the Chinese mythic shell T1); the top surface 111 of the support plate 11 is disposed toward the mythological shell T1; a plurality of support legs 12 are fixed to the bottom surface 112 of the support plate 11; the support legs 12 are all made of steel materials and are fixed with the bottom surface 112 of the support plate 11 in a welding mode; the base 13 is made of steel, is fixed with the support legs 12 in a welding mode, is close to one end of the support legs 12 far away from the support plate 11, and is positioned below the annular hole 113;
the screw jack 2 is mounted on the base 13 in a bolt fastening mode and is located under the annular hole 113, and a movable height for jacking the pump shaft T3 is reserved between the screw jack 2 and the pump shaft T3 when the Chinese myer shell T1 is fixed on the supporting plate 11, namely, the screw jack 2 can flexibly adjust the jacking height to jack the pump shaft T3 for movement or adjust the descending height to release the pump shaft T3, so that the requirement of measuring the axial clearance of a pump rotor during maintenance is met through the upper and lower jacking pump shafts T3.
In an embodiment of the utility model, the special tool further comprises an adjusting pad 3; the adjusting pad 3 is made of brass, is arranged above the screw jack 2 and is positioned between the screw jack 2 and the pump shaft T3, and is used for adjusting the relative position between the screw jack 2 and the pump shaft T3 and playing a role in isolating and protecting the end face of the head of the pump shaft T3.
In the embodiment of the present utility model, there are four support legs 12, and the four support legs 12 are fixed to the bottom surface 112 of the support plate 11 at intervals of 90 degrees, as shown in fig. 3 and 4. Of course, a different number (e.g., 3, 5, 6, etc.) of support legs 12 may be designed to meet the measurement requirements, depending on the actual implementation. It will be appreciated that the support legs 12 are designed for telescopic length adjustment in order to meet the adjustment requirements of the different pump shafts T3.
The specific steps of the using process of the special tool in the embodiment of the utility model are as follows:
first stage, assembling special tool. And selecting a proper universal screw jack 2 according to the weight of a rotor of the nuclear power containment spray pump or the low-pressure injection pump, the relative position of the end face of a shaft head and the joint face of a main flange and the axial running amount of the pump rotor, installing the screw jack 2 on a base 13 of the vertical overhaul support 1, and fastening and connecting the screw jack by using bolts to ensure flexible up-down operation and free of jamming and shaking.
And in the second stage, special tools are used. After the special tool is hoisted to a qualified place, a pump body of a nuclear power containment spray pump or a low-pressure injection pump is reversely installed, a proper adjusting pad 3 is placed between a pump shaft T3 and a general screw jack 2, the upper jacking height is flexibly adjusted to jack the pump shaft T3 for movement or the descending height is flexibly adjusted to release the pump shaft T3, so that the requirement of measuring the axial clearance of a pump rotor during maintenance is met through the upper jacking pump shaft T3 and the lower jacking pump shaft T3, and the axial running quantity of the pump rotor during maintenance can be measured by cooperation of operators.
The embodiment of the utility model has the following beneficial effects:
the special tool comprises the vertical overhaul support and the screw jack, and is installed on the base of the vertical overhaul support and located under the annular hole, and the movable height top pump shaft is flexibly adjusted to meet the requirement of axial clearance measurement of the pump rotor during overhaul.
The above disclosure is only a preferred embodiment of the present utility model, and it is needless to say that the scope of the utility model is not limited thereto, and therefore, the equivalent changes according to the claims of the present utility model still fall within the scope of the present utility model.
Claims (8)
1. A specialized tool used for the inverted maintenance of the pump body, it is used in the pump body formed by impeller and Chinese myself shell, characterized by that, including vertical maintenance support and screw jack; wherein,,
the vertical overhaul support comprises a support plate, a plurality of support legs and a base; the support plate is annular and comprises a top surface, a bottom surface, an annular hole penetrating through the top surface and the bottom surface and used for penetrating into a pump shaft connected with the front end of the impeller, and a plurality of through holes penetrating through the top surface and the bottom surface and used for fixing the Chinese art shell; the top surface of the supporting plate faces the Chinese mythology shell; the bottom surface of the supporting plate is fixed with the supporting legs; the base and the supporting legs are fixed together, are close to one end of the supporting legs far away from the supporting plate, and are positioned below the annular hole;
the screw jack is arranged on the base and is positioned right below the annular hole, and a movable height for jacking the pump shaft is reserved between the screw jack and the pump shaft when the screw jack and the Chinese myer shell are fixed on the supporting plate.
2. The special tool for inverted maintenance of a pump body according to claim 1, further comprising an adjustment pad; the adjusting pad is arranged above the screw jack and is positioned between the screw jack and the pump shaft.
3. The special tool for inverted maintenance of a pump body according to claim 2, wherein the adjusting pad is made of brass.
4. A special tool for inverted maintenance of a pump body according to claim 3, wherein the support plate is annular; the annular hole is a hollow round hole.
5. The special tool for pump body inverted maintenance according to claim 4, wherein the plurality of support legs is four, and the four support legs are fixed to the bottom surface of the support plate at intervals of 90 degrees.
6. The special tool for pump body inverted maintenance according to claim 5, wherein the support plate, the four support legs and the base are all made of steel; wherein,,
the supporting plate and the four supporting legs are fixed in a welding mode;
the four supporting legs and the base are fixed in a welding mode.
7. A special tool for inverted maintenance of a pump body as recited in claim 6, wherein said support plate is secured to said housing by threading a bolt through each of said through holes and engaging a corresponding nut.
8. The special tool for inverted maintenance of a pump body according to claim 7, wherein the pump body is a pump body of a nuclear containment spray pump or a low-pressure injection pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320281208.XU CN219472322U (en) | 2023-02-22 | 2023-02-22 | Special tool for inverted maintenance of pump body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320281208.XU CN219472322U (en) | 2023-02-22 | 2023-02-22 | Special tool for inverted maintenance of pump body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219472322U true CN219472322U (en) | 2023-08-04 |
Family
ID=87438344
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320281208.XU Active CN219472322U (en) | 2023-02-22 | 2023-02-22 | Special tool for inverted maintenance of pump body |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219472322U (en) |
-
2023
- 2023-02-22 CN CN202320281208.XU patent/CN219472322U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant |