CN115507052B - Auxiliary disassembly and assembly tool for multistage centrifugal pump and disassembly method for multistage centrifugal pump - Google Patents

Auxiliary disassembly and assembly tool for multistage centrifugal pump and disassembly method for multistage centrifugal pump Download PDF

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Publication number
CN115507052B
CN115507052B CN202211110073.7A CN202211110073A CN115507052B CN 115507052 B CN115507052 B CN 115507052B CN 202211110073 A CN202211110073 A CN 202211110073A CN 115507052 B CN115507052 B CN 115507052B
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China
Prior art keywords
centrifugal pump
multistage centrifugal
impeller
limiting
disassembly
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CN202211110073.7A
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CN115507052A (en
Inventor
刘成成
廖健
黄静
叶贤送
洪奔
叶超
吕喆
陈孝田
林洋
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China Nuclear Industry Maintenance Co Ltd
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China Nuclear Industry Maintenance Co Ltd
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Priority to CN202211110073.7A priority Critical patent/CN115507052B/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/007—Details, component parts, or accessories especially adapted for liquid pumps
    • 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
    • B25B27/14—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
    • F04D29/628—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for liquid pumps
    • 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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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

The embodiment of the application discloses a multistage centrifugal pump auxiliary disassembly tool and a multistage centrifugal pump disassembly method, wherein the multistage centrifugal pump auxiliary disassembly tool comprises a supporting seat, the supporting seat comprises a bottom plate and a convex part, and the convex part is used for accommodating a rotating shaft of the multistage centrifugal pump; the limiting assembly comprises a connecting rod and a limiting part. When the multistage centrifugal pump needs to be disassembled, a rotating shaft of the multistage centrifugal pump to be disassembled can be arranged in the convex part of the supporting seat, so that preliminary positioning of the multistage centrifugal pump is completed; the limiting component is abutted against an impeller to be disassembled of the multistage centrifugal pump so as to lock the impeller; the dismantlement of impeller can be accomplished to the bolt that rethread spanner was disassembled and is used for fixed impeller, and all impellers of multistage centrifugal pump can be disassembled to such circulation, and impeller, spacer and the cavity on the unblock multistage centrifugal pump through the multistage centrifugal pump auxiliary disassembly and assembly instrument that this application embodiment provided, need not reciprocal coordination and borrow the instrument, can practice thrift the manpower, reduces the conventional dismouting damage risk of pump.

Description

Auxiliary disassembly and assembly tool for multistage centrifugal pump and disassembly method for multistage centrifugal pump
Technical Field
The embodiment of the application relates to the technical field of mechanical equipment maintenance, in particular to an auxiliary disassembly and assembly tool for a multistage centrifugal pump and a disassembly method for the multistage centrifugal pump.
Background
In nuclear power equipment overhaul, the small vertical multistage centrifugal pump is widely applied to power stations, such as a main pump frequency converter cooling circulating water pump of a certain power station. The total length of the pump shaft is about 600mm, and the pump shaft is provided with four stages of impellers.
During the overhaul period of a nuclear power plant, the frequency converter cooling circulating water pump is disassembled on the third day of the overhaul for the first time, various specifications of wrenches and bench vices are needed to be used from a maintenance warehouse before the equipment is disassembled under normal conditions, after the motor and the lower half part of the pump body are integrally lifted out of the equipment, the equipment is moved to an overhaul site, a connecting nut of a pump cover and a pump support is removed, the pump support is integrally pulled out, the pump shaft and the pump body are required to be vertically fixed by the bench vice, the pump cover and the mechanical seal are removed, the pump cover and the mechanical seal are separated, fasteners are removed, an outer sleeve of a pump rotor part is knocked out by a rubber hammer, the distance from the locking nut of the first impeller to a shaft head is measured, and the locking nut is removed by using a conventional wrench. The distance from the conical jacket of the first-stage impeller to the shaft head is measured, and the conical jacket is removed by knocking with a copper rod. And sequentially taking out the impeller, the spacer bush and the cavity to finish the first-stage disassembly. The spline groove is arranged on the pump shaft, so that the pump shaft must be cleaned when the impeller is pulled out, and the impeller is prevented from being taken out to be blocked. The measurement of the relevant data is performed in the same manner as described above and the remaining cavities, impellers, etc. are removed entirely. The conical jacket of the fourth-stage impeller is installed in place, the fourth-stage impeller is installed back and fixed in place with the conical jacket, and the copper rod is used for impacting. And installing a fourth-stage impeller locking nut, fastening by using a conventional wrench, and retesting whether the data are qualified or not by using a depth vernier caliper. And installing the fourth-stage spacer bush and the cavity in place, and measuring whether the shaft channeling is qualified or not by using a depth vernier caliper. The remaining rotor component mounting is performed according to the fourth stage impeller step.
According to the existing technology, key points of equipment disassembly and assembly and locking nuts in the reinstallation process are adjusted, a male English spanner needs to be exchanged back and forth, corresponding tools and instruments are wrong in shape selection, equipment and personnel are damaged, and meanwhile manpower waste is caused by back and forth coordination of tools.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art or related art.
To this end, a first aspect of the present invention provides an auxiliary disassembly tool for a multistage centrifugal pump.
A second aspect of the invention provides a method of disassembling a multistage centrifugal pump.
In view of this, a first aspect according to an embodiment of the present application provides an auxiliary disassembly and assembly tool for a multistage centrifugal pump, including:
the support seat comprises a bottom plate and a convex part arranged on the bottom plate, and the convex part is used for accommodating a rotating shaft of the multistage centrifugal pump;
the limiting assembly comprises a connecting rod and a limiting part arranged at one end of the connecting rod, and the limiting part is used for locking the impeller of the multistage centrifugal pump.
In one possible embodiment, the multi-stage centrifugal pump auxiliary disassembly tool further includes: a wrench, the wrench comprising:
the wrench comprises a wrench body, wherein a screwing hole is formed on the end face of the wrench body, and the screwing hole is used for accommodating a bolt to be detached or installed of the multistage centrifugal pump;
the arm hole is formed in the periphery of the wrench body;
the force arm rod is used for being inserted into the force arm hole.
In one possible embodiment, the protrusion includes:
a receiving hole formed on the protrusion for receiving the rotation shaft;
and the limiting hole is formed in the side wall of the convex part and is communicated with the accommodating hole.
In one possible embodiment, the multi-stage centrifugal pump auxiliary disassembly tool further includes:
the limiting pin penetrates through the limiting hole and is used for limiting the rotating shaft.
In one possible embodiment, the limiting portion includes:
the connecting rod is connected to the middle part of the arc-shaped ring;
the limiting block is arranged at the end part of the arc-shaped ring, and the limiting hole is used for being abutted to the impeller.
In one possible embodiment, the multi-stage centrifugal pump auxiliary disassembly tool further includes:
the beating piece is made of elastic materials, is of a hollow structure and is used for disassembling interference fit parts on the multistage centrifugal pump.
In one possible embodiment, the striking member is columnar.
According to a second aspect of the embodiments of the present application, a method for disassembling a multistage centrifugal pump is provided, which is used for the auxiliary disassembly tool for a multistage centrifugal pump according to any one of the above technical solutions, and the method for disassembling a multistage centrifugal pump includes:
setting a rotating shaft of the multistage centrifugal pump to be disassembled in the convex part of the supporting seat, and completing preliminary positioning of the multistage centrifugal pump;
abutting the limiting assembly against an impeller to be disassembled of the multistage centrifugal pump so as to lock the impeller;
and disassembling bolts for fixing the impeller.
In a possible embodiment, the step of disassembling the bolts for fixing the impeller includes:
a nut for accommodating the bolt through a screwing hole in the wrench body;
and inserting the arm lever into the arm hole of the wrench body, and turning the arm lever to disassemble the bolt.
In one possible embodiment, the method of disassembling a multistage centrifugal pump further comprises:
the conical jacket is knocked by the knocking piece so as to be disassembled.
Compared with the prior art, the invention at least comprises the following beneficial effects: the auxiliary disassembly and assembly tool for the multistage centrifugal pump comprises a supporting seat and a limiting assembly, when the multistage centrifugal pump needs to be disassembled, a rotating shaft of the multistage centrifugal pump to be disassembled can be arranged in a convex part of the supporting seat, and preliminary positioning of the multistage centrifugal pump is completed; the limiting component is abutted against an impeller to be disassembled of the multistage centrifugal pump so as to lock the impeller; the bolts for fixing the impellers can be disassembled through the wrench, so that all impellers of the multistage centrifugal pump can be disassembled through circulation, and the impellers, the spacer and the cavity on the multistage centrifugal pump are unlocked; when the maintenance is finished and the multistage centrifugal pump is required to be assembled, the rotating shaft of the assembled multistage centrifugal pump can be arranged in the convex part of the supporting seat to finish the preliminary positioning of the multistage centrifugal pump; and then the limiting component is abutted against an impeller to be disassembled of the multistage centrifugal pump so as to lock the impeller, prevent the impeller from rotating, and fix the impeller through bolts. Through the supplementary assembly and disassembly tools of multistage centrifugal pump that this application embodiment provided, at the in-process of disassembling and assembling multistage centrifugal pump, need not to use bench vice and other traditional equipment that needs the model adaptation, but fix multistage centrifugal pump through supporting seat and spacing subassembly, need not reciprocal coordination and borrow the instrument, can practice thrift the manpower, reduce the conventional dismouting damage risk of pump.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:
FIG. 1 is a schematic block diagram of a support base of an auxiliary disassembly and assembly tool for a multistage centrifugal pump according to one embodiment provided herein;
FIG. 2 is a schematic block diagram of a spacing assembly of a multistage centrifugal pump auxiliary assembly and disassembly tool according to one embodiment provided herein;
FIG. 3 is a schematic block diagram of a wrench for a multi-stage centrifugal pump auxiliary disassembly tool according to one embodiment provided herein;
FIG. 4 is a schematic block diagram of a striking member of a multi-stage centrifugal pump auxiliary disassembly tool according to one embodiment provided herein;
fig. 5 is a schematic step flow diagram of a method for disassembling a multistage centrifugal pump according to an embodiment provided herein.
The correspondence between the reference numerals and the component names in fig. 1 to 4 is:
110 supporting seats, 120 limiting components, 130 wrenches and 140 striking pieces;
111 bottom plate, 112 convex part, 121 connecting rod, 122 limit part, 131 spanner body, 132 arm hole;
1121 accommodating holes, 1122 limiting holes, 1221 arc rings and 1222 limiting blocks.
Detailed Description
In order to better understand the technical solutions described above, the technical solutions of the embodiments of the present application are described in detail below through the accompanying drawings and the specific embodiments, and it should be understood that the embodiments of the present application and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of the present application, and not limit the technical solutions of the present application, and the embodiments of the present application and the technical features in the embodiments of the present application may be combined with each other without conflict.
As shown in fig. 1 to 4, according to a first aspect of an embodiment of the present application, an auxiliary disassembly and assembly tool for a multistage centrifugal pump is provided, including: a support base 110, the support base 110 comprising a base plate 111 and a protrusion 112 provided on the base plate 111, the protrusion 112 for accommodating a rotation shaft of the multistage centrifugal pump; the limiting assembly 120, the limiting assembly 120 includes a connecting rod 121 and a limiting portion 122 disposed at one end of the connecting rod 121, and the limiting portion 122 is used for locking an impeller of the multistage centrifugal pump.
The auxiliary disassembly and assembly tool for the multistage centrifugal pump provided by the embodiment of the application comprises the supporting seat 110 and the limiting assembly 120, and when the multistage centrifugal pump needs to be disassembled, the rotating shaft of the multistage centrifugal pump to be disassembled can be arranged in the convex part 112 of the supporting seat 110, so that the preliminary positioning of the multistage centrifugal pump is completed; the limiting assembly 120 is abutted against an impeller to be disassembled of the multistage centrifugal pump so as to lock the impeller; the bolts for fixing the impellers can be disassembled through the wrench 130, so that all impellers of the multistage centrifugal pump can be disassembled through circulation, and the impellers, the spacer and the cavity on the multistage centrifugal pump are unlocked; when the maintenance is completed and the multistage centrifugal pump is required to be assembled, the rotating shaft of the assembled multistage centrifugal pump can be arranged in the convex part 112 of the supporting seat 110 to complete the preliminary positioning of the multistage centrifugal pump; and then the limiting assembly 120 is abutted against the impeller to be disassembled of the multistage centrifugal pump so as to lock the impeller, prevent the impeller from rotating, and then fix the impeller through bolts. Through the supplementary assembly and disassembly tools of multistage centrifugal pump that this application embodiment provided, at the in-process of disassembling and assembling multistage centrifugal pump, need not to use bench vice and other traditional equipment that needs the model adaptation, but fix multistage centrifugal pump through supporting seat 110 and spacing subassembly 120, need not reciprocal cooperation borrow the instrument, can practice thrift the manpower, reduce the conventional dismouting damage risk of pump.
When the multistage centrifugal pump is disassembled by the auxiliary disassembly and assembly tool of the multistage centrifugal pump, the method specifically comprises the following steps:
1. firstly, placing the supporting seat 110 on a flat maintenance field;
2. when the motor and the lower half part of the pump body are integrally lifted out of the equipment, the connecting nut of the pump cover and the pump support is disassembled, the pump support is integrally pulled out, and the pump core package is vertically fixed on the supporting seat 110;
3. sequentially removing the pump cover and the mechanical seal, separating the pump cover and the mechanical seal, removing the fastener, and knocking out the outer sleeve of the pump rotor part by using a rubber hammer;
4. measuring the distance from the first-stage impeller lock nut to the shaft head, limiting the impeller by using a limiting assembly 120, and removing the lock nut by using a wrench 130;
5. and sequentially taking out the impeller, the spacer bush and the cavity to finish the first-stage disassembly. The spline groove is formed in the pump shaft, and the pump shaft must be cleaned when the impeller is pulled out, so that the impeller is prevented from being taken out to be blocked;
6. the measurement of the relevant data is performed in the same manner as described above and the remaining cavities, impellers, etc. are removed entirely.
When the multistage centrifugal pump is assembled by the auxiliary disassembly and assembly tool of the multistage centrifugal pump, the method specifically comprises the following steps:
1. the fourth stage impeller was reinstalled and secured in place with the tapered jacket. Limiting the impeller by using a limiting assembly 120, installing a fourth-stage impeller lock nut, fixing the lock nut by using a wrench 130, and retesting whether the data are qualified or not by using a depth vernier caliper;
2. installing a fourth-stage spacer bush and a cavity in place, and measuring whether shaft channeling is qualified or not by using a depth vernier caliper;
3. the remaining rotor component mounting is performed according to the fourth stage impeller step.
The auxiliary disassembly and assembly tool for the multistage centrifugal pump can replace conventional tools and instruments to operate. The device is brought to a maintenance site, so that overhaul/daily disassembly and assembly work can be completed, and the equipment damage risk caused by maintenance can be reduced in the middle process; the original disassembly and assembly process is completely replaced, and the normal operation of the system is reduced due to the disassembly and assembly of equipment.
As shown in fig. 1 to 4, in one possible embodiment, the multi-stage centrifugal pump auxiliary disassembly tool further includes: wrench 130, wrench 130 includes: the wrench body 131, a screwing hole is formed on the end face of the wrench body 131, and the screwing hole is used for accommodating a bolt to be disassembled or installed of the multistage centrifugal pump; arm hole 132 formed on the periphery of wrench body 131; the arm lever is used for being inserted into the arm hole 132.
In this technical scheme, multistage centrifugal pump auxiliary disassembly and assembly instrument can also include spanner 130, spanner 130 has included spanner body 131 and arm of force pole, and spanner body 131 has formed on and has revolved and twist hole and arm of force hole 132, when disassembling or install the bolt through spanner 130, only need accept the nut in the spiral hole, peg graft the arm of force pole in arm of force hole 132 again, drive spanner body 131 rotation through the turning force arm of rod, spanner body 131 rotation can drive the bolt rotation, in spacing subassembly 120 combination use, the bolt can produce relative displacement with the impeller between, can accomplish the installation and the fixed of bolt.
It can be appreciated that the wrench body 131 and the arm lever are designed in a split type, so that the wrench 130 provided with the split type wrench can be adapted to the disassembly and the assembly of bolts with different mounting clearances, and the adapting range of the wrench 130 can be improved.
As shown in fig. 1-4, in some examples, the moment arm holes 132 may be multiple, with the multiple moment arm holes 132 being spaced apart on the perimeter side of the wrench 130.
In some examples, six holes in the hole site are screwed to facilitate the limiting of the nut, so that the wrench body 131 can rotate while driving the bolt.
As shown in fig. 1 to 4, in one possible embodiment, the protrusion 112 includes: an accommodating hole 1121 formed on the boss 112, the accommodating hole 1121 for accommodating the rotation shaft; the stopper hole 1122 is formed in the side wall of the protruding portion 112 and communicates with the accommodation hole 1121.
In this technical scheme, further provided the style of convex part 112, convex part 112 has included accommodation hole 1121, can accomodate multistage centrifugal pump's pivot through the setting of this accommodation hole 1121, is convenient for carry out vertical fixation with multistage centrifugal pump, and the disassembly and the installation of multistage centrifugal pump's impeller of being convenient for can carry out spacingly to the pivot through the setting of spacing hole 1122, can avoid multistage centrifugal pump to take off or misplace.
As shown in fig. 1 to 4, in one possible embodiment, the multi-stage centrifugal pump auxiliary disassembly tool further includes: the limiting pin penetrates through the limiting hole 1122 and is used for limiting the rotating shaft.
In this technical scheme, multistage centrifugal pump auxiliary disassembly and assembly instrument can also include spacing pin, passes spacing hole 1122 butt on the pivot through spacing pin, and spacing pin can be spacing the pivot, can prevent that multistage centrifugal pump from sending out pine takes off or dislocation for multistage centrifugal pump's dismantlement and installation are safer.
As shown in fig. 1 to 4, in one possible embodiment, the limiting portion 122 includes: an arc ring 1221, the link 121 being connected to a middle portion of the arc ring 1221; the limiting block 1222 is disposed at an end of the arc ring 1221, and the limiting hole 1122 is used for abutting against the impeller.
In this technical scheme, spacing portion 122 can include arc ring 1221 and stopper 1222, can adapt to the profile of impeller through the setting of arc ring 1221, can joint in the impeller through stopper 1222, so set up under connecting rod 121 is in fixed stationary state, the impeller can be in by spacing state, and rethread spanner 130 drives the bolt and rotates, and the bolt can produce relative displacement with the impeller, can accomplish the installation and the dismantlement of impeller.
As shown in fig. 1 to 4, in one possible embodiment, the multi-stage centrifugal pump auxiliary disassembly tool further includes: the beating piece is made of elastic materials and is of a hollow structure and used for disassembling interference fit parts on the multistage centrifugal pump.
In the technical scheme, the auxiliary dismounting tool for the multistage centrifugal pump can further comprise a striking piece, the component which is assembled on the pump body in an interference mode can be struck through the striking piece, and the component which is in interference fit on the multistage centrifugal pump can be dismounted or mounted. The beating piece is made of elastic materials and is of a hollow structure, so that damage to parts of the multistage centrifugal pump due to beating can be avoided.
It will be appreciated that the components of the interference fit assembly may comprise tapered jackets.
In some examples, the striking member may be made of polytetrafluoroethylene material.
In one possible embodiment, the striking member is cylindrical. The arrangement is convenient for an operator to hold.
As shown in fig. 5, a method for disassembling a multistage centrifugal pump according to a second aspect of an embodiment of the present application is provided, where the method is used for the auxiliary disassembly tool for a multistage centrifugal pump according to any one of the above-mentioned technical solutions, and the method for disassembling a multistage centrifugal pump includes:
step 201: and arranging the rotating shaft of the multistage centrifugal pump to be disassembled in the convex part of the supporting seat to finish the preliminary positioning of the multistage centrifugal pump. It can be understood that under the condition that the multi-stage centrifugal pump is lifted and separated from the equipment, the pump cover of the multi-stage centrifugal pump can be disassembled, so that the rotating shaft of the multi-stage centrifugal pump is naked, and then the rotating shaft is inserted into the protruding part, so that the preliminary fixing of the multi-stage centrifugal pump can be completed.
Step 202: the limiting component is abutted against an impeller to be disassembled of the multistage centrifugal pump so as to lock the impeller. It can be understood that spacing subassembly connecting rod and the spacing portion of setting in connecting rod one end, spacing portion and impeller butt, the connecting rod have increased the arm of force, when the spacing subassembly locking impeller of rethread, the staff can hold the connecting rod and keep away from in the one end of spacing portion, and the staff can easily lock the impeller.
Step 203: and disassembling bolts for fixing the impeller. It can be appreciated that the bolts can be disassembled by the wrench, and the impeller can be in an unlocked state under the condition that the bolts are disassembled.
Through the multistage centrifugal pump disassembly method that this application embodiment provided, at the in-process of disassembling and assembling multistage centrifugal pump, need not to use bench vice and other traditional equipment that need the model adaptation, but fix multistage centrifugal pump through supporting seat and spacing subassembly, need not reciprocal coordination borrow the instrument, can practice thrift the manpower, reduce the conventional dismouting damage risk of pump.
In one possible embodiment, the step of disassembling the bolts for fixing the impeller includes: a nut for receiving a bolt through a screwing hole in the wrench body; the arm rod is inserted into the arm hole of the wrench body, and the bolt is disassembled by rotating the arm rod.
In this technical scheme, further provided the concrete process step of disassembling the bolt, the spanner has included spanner body and power armed lever, and formed on the spanner body and revolve and twist hole and arm of force hole, when disassembling or installing the bolt through the spanner, only need accept the nut in the spiral hole, peg graft the arm of force lever in the arm of force hole again, drive spanner body through the power armed lever and rotate, spanner body rotates and can drive the bolt rotation, in spacing subassembly combination use, the bolt can produce relative displacement with the impeller between, can accomplish the installation and the fixed of bolt.
In one possible embodiment, the method of disassembling a multistage centrifugal pump further comprises: the conical jacket is knocked by the knocking piece so as to disassemble the conical jacket.
The conical jacket is convenient to detach, and meanwhile damage to the conical jacket can be avoided.
In some examples, the multi-stage centrifugal pump disassembly method may specifically include the steps of:
1. firstly, placing a supporting seat on a flat maintenance field;
2. when the motor and the lower half part of the pump body are integrally lifted out of the equipment, the connecting nut of the pump cover and the pump support is disassembled, the pump support is integrally pulled out, and the pump core bag is vertically fixed on the supporting seat;
3. sequentially removing the pump cover and the mechanical seal, separating the pump cover and the mechanical seal, removing the fastener, and knocking out the outer sleeve of the pump rotor part by using a rubber hammer;
4. measuring the distance from the first-stage impeller lock nut to the shaft head, limiting the impeller by using a limiting assembly, and removing the lock nut by using a spanner;
5. and sequentially taking out the impeller, the spacer bush and the cavity to finish the first-stage disassembly. The spline groove is formed in the pump shaft, and the pump shaft must be cleaned when the impeller is pulled out, so that the impeller is prevented from being taken out to be blocked;
6. the measurement of the relevant data is performed in the same manner as described above and the remaining cavities, impellers, etc. are removed entirely.
In the present invention, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more, unless expressly defined otherwise. The terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; "coupled" may be directly coupled or indirectly coupled through intermediaries. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "front", "rear", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or units referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present invention.
In the description of the present specification, the terms "one embodiment," "some embodiments," "particular embodiments," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (7)

1. An auxiliary disassembly and assembly tool for a multistage centrifugal pump, comprising:
the support seat comprises a bottom plate and a convex part arranged on the bottom plate, and the convex part is used for accommodating a rotating shaft of the multistage centrifugal pump;
the limiting assembly comprises a connecting rod and a limiting part arranged at one end of the connecting rod, and the limiting part is used for locking an impeller of the multistage centrifugal pump;
the convex portion includes:
a receiving hole formed on the protrusion for receiving the rotation shaft;
the limiting hole is formed in the side wall of the convex part and communicated with the accommodating hole;
the limit part includes:
the connecting rod is connected to the middle part of the arc-shaped ring;
the limiting block is arranged at the end part of the arc-shaped ring;
the arc-shaped ring is adapted to the outline of the impeller, the limiting block is used for being clamped with the impeller to prevent the impeller from rotating, and the impeller can be in a limited state when the connecting rod is in a fixed and static state;
the disassembly method of the multistage centrifugal pump by the auxiliary disassembly and assembly tool of the multistage centrifugal pump comprises the following steps:
after the motor and the lower half part of the pump body are integrally lifted out of the equipment, the pump core bag is vertically fixed on the supporting seat;
setting a rotating shaft of the multistage centrifugal pump to be disassembled in the convex part of the supporting seat, and completing preliminary positioning of the multistage centrifugal pump;
the limiting component is abutted against an impeller to be disassembled of the multistage centrifugal pump so as to lock the impeller and prevent the impeller from rotating;
and disassembling bolts for fixing the impeller.
2. The auxiliary disassembly and assembly tool for a multistage centrifugal pump according to claim 1, further comprising: a wrench, the wrench comprising:
the wrench comprises a wrench body, wherein a screwing hole is formed on the end face of the wrench body, and the screwing hole is used for accommodating a bolt to be detached or installed of the multistage centrifugal pump;
the arm hole is formed in the periphery of the wrench body;
the force arm rod is used for being inserted into the force arm hole.
3. The auxiliary disassembly and assembly tool for a multistage centrifugal pump according to claim 1, further comprising:
the limiting pin penetrates through the limiting hole and is used for limiting the rotating shaft.
4. A multistage centrifugal pump auxiliary disassembly tool according to any one of claims 1 to 3, further comprising:
the beating piece is made of elastic materials, is of a hollow structure and is used for disassembling interference fit parts on the multistage centrifugal pump.
5. The auxiliary disassembly and assembly tool for a multistage centrifugal pump according to claim 4, wherein,
the striking piece is columnar.
6. The auxiliary disassembly and assembly tool for a multistage centrifugal pump according to claim 1, wherein the step of disassembling the bolts for fixing the impeller comprises:
a nut for accommodating the bolt through a screwing hole in the wrench body;
and inserting the arm lever into the arm hole of the wrench body, and turning the arm lever to disassemble the bolt.
7. The auxiliary disassembly and assembly tool for a multistage centrifugal pump according to claim 6, further comprising:
the conical jacket is knocked by the knocking piece so as to be disassembled.
CN202211110073.7A 2022-09-13 2022-09-13 Auxiliary disassembly and assembly tool for multistage centrifugal pump and disassembly method for multistage centrifugal pump Active CN115507052B (en)

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CN202900794U (en) * 2012-10-30 2013-04-24 中国神华能源股份有限公司 Multistage centrifugal pump disassembling device
US9957979B2 (en) * 2014-07-14 2018-05-01 Michael Key Impeller removal and installation
CN204263082U (en) * 2014-11-13 2015-04-15 甘肃酒钢集团宏兴钢铁股份有限公司 A kind of centrifugal pump impeller tool special for dismounting
CN204935489U (en) * 2015-07-29 2016-01-06 吴中经济开发区先淘五金水暖经营部 A kind of combination wrench
CN210623212U (en) * 2019-08-21 2020-05-26 杭州兴海铸造有限公司 Multistage cryogenic pump impeller extracting tool
CN111055233B (en) * 2019-12-24 2022-02-18 福建福清核电有限公司 Tool and method for disassembling and assembling core package of horizontal multistage centrifugal pump in nuclear power plant
CN212471315U (en) * 2020-05-12 2021-02-05 宜昌市西峡泵业有限公司 Multistage centrifugal pump impeller disassembling tool
CN214661092U (en) * 2021-03-22 2021-11-09 中海石油化学股份有限公司 Special tool for disassembling impeller of multistage centrifugal pump

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