CN117823469A - Installation method of large dry dock draining pump - Google Patents

Abstract

The invention belongs to the technical field of installation of large dry dock draining pumps, and particularly discloses an installation method of a large dry dock draining pump, which comprises the following steps: (1) determining the position and height of the base of the main drain pump; (2) Connecting the impeller eye section, the impeller section and the pump body outside the machine pit to form a whole; (3) Placing the base of the main drain pump on the arranged wedge plate; (4) Adjusting the central axis of the water outlet flange of the main drainage pump and the central axis of the pipe orifice flange of the drainage pipe to keep consistent; (5) grouting and pouring foundation bolts, and screwing the foundation bolts; (6) removing the pump body from the base and lifting the pump body away; (7) grouting and pouring the base, and reinstalling the pump body; (8) Hoisting the motor to the top end of the pump body to connect the motor shaft with the impeller shaft, so as to complete the integral installation of the main drainage pump; (9) And connecting the water outlet flange of the main drainage pump with the water outlet flange of the drain pipe orifice. The invention can eliminate the deviation between the installation of the main drainage pump and the glass fiber reinforced plastic drainage pipe.

Description

Installation method of large dry dock draining pump

Technical Field

The invention relates to the technical field of installation of large dry dock drainage pumps for wharfs and shipbuilding maintenance ports, in particular to an installation method of a large dry dock drainage pump.

Background

In the installation of the drainage pump with the vertical structure, for the convenience of construction and the guarantee of the effective reliability of the connection of the drainage pump and the drainage pipeline, the drainage pump is installed firstly, and then the drainage pipe is connected and installed step by step according to the determined height position of the pipe orifice of the drainage pump; however, for marine structures such as large dry dock, the drain pipe of the main drain pump is often made of glass fiber reinforced plastic materials, all pipe joints and pipe sections of the glass fiber reinforced plastic materials are manufactured in factories due to the special material property of the drain pipe, and in order to prevent seawater from penetrating into a pump room along the outer edge of the glass fiber reinforced plastic materials, all pipes are required to be embedded in a concrete structure, and only part of pipe sections and connecting flanges are exposed at the joint of the drain pump and the drain pump, and the drain pump must be installed after the concrete structure of the pump room is poured; the dry dock is used as a ship manufacturing and overhauling workplace, the amount of seawater to be discharged is huge, and further the power and the body amount of the installed main drainage pump are also very large, so that the dry dock needs to be transported to the site for assembly in a segmented manner. Under the construction condition, a series of problems that the connection of the main drainage pump and the drainage pipe is deviated, the field assembly of the main drainage pump is limited by space and the like can occur, so that a construction method which has the advantages of feasible technical scheme, small operation difficulty, controllable construction quality, safety, reliability, economy and rationality is needed.

Disclosure of Invention

The invention provides a method for installing a large dry dock draining pump, which aims to install a glass fiber reinforced plastic draining pipe orifice flange serving as a main draining pump with the alignment standard, eliminate the deviation between the installation of the main draining pump and the installation of the glass fiber reinforced plastic draining pipe and ensure the reliability of the connection of the main draining pump and the glass fiber reinforced plastic draining pipe.

The invention is realized by the following technical scheme: the installation method of the large dry dock draining pump comprises the following steps:

(1) Determining the position and the height of a base of the main drainage pump at the pit position according to the height and the position of a drain pipe orifice flange, symmetrically pouring a slurry seat plate around the center position of the base, and arranging a wedge plate for fine-adjusting the height and the level of the main drainage pump on the slurry seat plate;

(2) The main drainage pump consists of an impeller eye section, an impeller section, a pump body, an impeller assembly and a motor, wherein the impeller eye section, the impeller section and the pump body are sequentially connected and assembled from bottom to top outside a machine pit to form a whole, the impeller assembly is arranged inside the main drainage pump, and the impeller assembly of the impeller is continuously arranged at an assembly site and is subjected to packing sealing;

(3) Placing a base of the main drainage pump on the arranged wedge plate, placing a pump body of the main drainage pump assembled in the step (2) on the base and connecting the pump body with the base, assembling foundation bolts and nuts of the base on the base and placing the foundation bolts and nuts in foundation bolt reserved holes, and enabling an impeller eye section and an impeller section of the main drainage pump to penetrate through the base;

(4) The water outlet flange of the main drainage pump is adjusted by taking the azimuth and the elevation of the water outlet flange of the water outlet pipe as a reference through sliding the wedge plate, so that the water outlet flange of the main drainage pump is consistent with the central axis of the water outlet pipe flange;

(5) Checking that the axis of a water outlet flange of the main drainage pump is consistent with that of a water outlet flange of the drain pipe orifice, grouting and pouring an anchor bolt, and screwing the anchor bolt after the grouting and pouring reaches a maintenance period;

(6) Removing the pump body from the base and lifting the pump body away;

(7) Grouting and pouring the base, and after the grouting concrete of the base reaches a curing period, returning the pump body to the base and connecting and fixing the pump body and the base;

(8) Hoisting the motor to the top end of the pump body to connect the motor shaft with the impeller shaft, so as to complete the integral installation of the main drainage pump;

(9) The water outlet flange of the main drainage pump and the water outlet flange of the drain pipe orifice are connected with each other through an expansion joint.

According to the scheme, the drain pipe orifice flange is used as the alignment standard for the installation of the main drain pump, so that the deviation between the installation of the main drain pump and the glass fiber reinforced plastic drain pipe can be effectively eliminated, and the reliability of the connection of the main drain pump and the glass fiber reinforced plastic drain pipe is ensured. In addition, in this scheme at the pump body of the outer equipment main drain pump of machine hole, can solve the pump body and receive the safety and the quality hidden danger that the space is narrow, daylighting is not enough to cause when the equipment in the machine hole, can guarantee the installation quality of whole pump body.

The height and the horizontal position of the base and the pump body can be adjusted by the wedge plate, and the wedge plate is placed on the slurry plate, so that the stability and the reliability of the wedge plate can be kept.

Further, the upper wedge plate is located at the top of the lower wedge plate, the top end of the upper wedge plate and the bottom end of the lower wedge plate are both planes, and one ends of the upper wedge plate and the lower wedge plate, which are in contact with each other, are inclined planes in wedge fit with each other.

The beneficial effects are that: in this scheme go up wedge board and lower wedge board wedge face cooperation, can play the effect to main drain pump elevation fine setting.

Further, in the step (2), a supporting frame for supporting the main drainage pump is manufactured and assembled according to the outline dimension of the main drainage pump, and a main drainage pump assembling site is selected, the supporting frame is placed on the assembling site, and the impeller eye section, the impeller section and the pump body are assembled on the supporting frame of the assembling site.

The beneficial effects are that: can play auxiliary effect to the pump body of equipment main drain pump through the support frame in this scheme, it is more convenient to assemble, and plays the effect of support for the part of equipment, hoist and mount after convenient equipment.

Further, in the step (2), the impeller section and the impeller eye section penetrate through the top end of the supporting frame, a plurality of rib plates are circumferentially arranged on the upper portion of the impeller section and located on the outer side of the impeller section, and the rib plates of the impeller section are supported and placed on the top end of the supporting frame.

The beneficial effects are that: according to the scheme, the supporting effect can be achieved through the cooperation of the rib plates on the impeller sections and the top ends of the supporting frames, special fasteners are not needed for fastening operation in the mode, and the novel impeller support is more convenient and rapid.

Further, the impeller assembly comprises an impeller and an impeller shaft, the impeller shaft comprises an impeller shaft upper section and an impeller shaft lower section, the impeller is positioned at the inner side of the impeller eye section, an impeller shaft coupler assembly is connected between the impeller shaft upper section and the impeller shaft lower section, the impeller shaft coupler assembly comprises an impeller shaft coupler and a gland, and the specific steps of installing the impeller shaft in the step (2) are as follows:

(21) The gland is sleeved at one end of the upper section of the impeller shaft and one end of the lower section of the impeller shaft, which are connected with each other;

(22) Screwing the lower section of the impeller shaft into the lower part of the impeller shaft coupler, and screwing the upper section of the impeller shaft into the upper part of the impeller shaft coupler;

(23) And connecting and fixing the gland on the upper section and the lower section of the impeller shaft with the two ends of the impeller shaft coupler respectively.

The beneficial effects are that: in the scheme, the upper impeller shaft section and the lower impeller shaft section are connected through the impeller shaft coupler, and the fastening degree of the upper impeller shaft section, the lower impeller shaft section and the impeller shaft coupler can be further enhanced through the arrangement of the gland.

Further, the lower section of the impeller shaft is in threaded connection with the impeller shaft coupling and the upper section of the impeller shaft is in threaded locking with the impeller shaft coupling through the fit of the insert key and the key groove.

The beneficial effects are that: the scheme can improve the tightness of connection between the impeller shaft upper section, the impeller shaft lower section and the impeller shaft coupler.

Further, a packing sealing component is arranged on the outer side of the impeller shaft, the packing sealing component comprises a packing pressing plate and a packing cylinder, the packing cylinder is sleeved on the outer side of the impeller shaft, a gap between the packing cylinder and the impeller shaft forms a sealing groove, and the packing sealing step in the step (2) is as follows:

(24) Calculating the length of the filler to be sheared according to the diameter of the impeller shaft, so that the length of the filler can be annularly plugged into a gap between the filler cylinder and the impeller shaft;

(25) Filling the filling materials into the sealing grooves layer by layer in sequence from bottom to top;

(26) One end of the packing pressing plate is pressed into the sealing groove, and the packing pressing plate is fixed with the packing cylinder.

The beneficial effects are that: according to the scheme, the packing is pressed into the sealing groove in a layered mode, and the sealing effect can be improved.

Further, the joint positions of each layer of filler are staggered from each other.

The beneficial effects are that: the arrangement can enable each layer of sealing grooves to be pressed more tightly, and the sealing performance is better.

In the step (8), the motor is hoisted to the top mounting surface of the pump body and aligned to the fixing bolt holes of the mounting surface, after the motor is in place, the motor shaft is connected with the impeller shaft through the coupler, the upper end part of the coupler is sleeved into the motor shaft, and the lower end part of the coupler is sleeved into the impeller shaft; then a motor shaft nut is screwed into the screw rod at the end part of the motor shaft, and an impeller shaft adjusting nut is screwed into the screw rod at the end part of the impeller shaft; and finally, fixedly connecting the upper end part of the coupler with the lower end part of the coupler, and then fixing the motor with the top mounting surface of the pump body through a fixing bolt.

The beneficial effects are that: in the scheme, the motor shaft and the impeller shaft are connected through the coupler, and the coupler is divided into an upper end part and a lower end part, so that the motor shaft and the impeller shaft can be connected respectively, and the assembly is more convenient.

Further, after the upper end part of the coupler is connected with the lower end part of the coupler, the impeller can be lifted to be in a suspended state, so that a gap is reserved between the impeller and a shell of an eye section of the impeller, and the height of the suspended state of the impeller is adjusted as follows:

(81) Screwing the impeller shaft adjusting nut onto the threaded rod end of the impeller shaft, and then measuring the gap value between the upper plane of the impeller shaft adjusting nut and the bottom surface of the upper end part of the coupler when the impeller is placed on the shell of the impeller eye section;

(82) Subtracting the height value in the suspended state from the clearance value according to the height value when the impeller lifts the suspended state, wherein the height of the impeller shaft adjusting nut, which is required to be screwed upwards, is required to be screwed on the screw at the end part of the impeller shaft;

(83) The impeller shaft adjustment nut is threaded up to the calculated height.

The beneficial effects are that: according to the scheme, the impeller can be suspended in the air in the adjusting mode, so that collision scraping can not be generated between the impeller and the shell of the impeller eye section in the rotating process of the impeller.

Compared with the prior art, the invention has the following advantages and beneficial effects:

1. according to the invention, the pump body of the main drainage pump is assembled by adopting auxiliary tools such as the support frame and the like outside the machine pit, so that the hidden danger of safety and quality caused by narrow space and insufficient lighting of the pump body assembled in the machine pit is solved, and the installation quality of the whole pump body is ensured.

2. According to the invention, the glass fiber reinforced plastic drain pipe orifice flange is used as the alignment standard for the installation of the main drain pump, so that the deviation between the installation of the main drain pump and the glass fiber reinforced plastic drain pipe is eliminated, and the reliability of the connection of the main drain pump and the glass fiber reinforced plastic drain pipe is ensured; in particular to a simple and effective solution provided under the condition that the secondary correction and adjustment cannot be carried out on the drainage pipeline made of special materials such as glass reinforced plastic pipes.

3. As the port for manufacturing and maintaining the ship with the largest global, the main drainage pump also belongs to the largest main drainage pump of the marine engineering same type pump.

Drawings

The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiments of the invention. In the drawings:

FIG. 1 is a diagram showing the overall arrangement of a main drain pump and a glass fiber reinforced plastic drain pipe according to an embodiment of the present invention;

FIG. 2 is a schematic view of a main drainage pump seat pulp sheet and cleat assembly according to an embodiment of the present invention;

FIG. 3 is a cross-sectional view at A-A in FIG. 2;

FIG. 4 is a diagram showing the overall arrangement of the pump body of the main drain pump according to the embodiment of the present invention;

FIG. 5 is an overall arrangement of rotary parts in the pump body according to an embodiment of the present invention;

FIG. 6 is a layout of an impeller shaft coupling according to an embodiment of the present invention;

FIG. 7 is a diagram of a packing seal arrangement in accordance with an embodiment of the present invention;

FIG. 8 is a layout of the motor shaft and impeller shaft connection to the coupler of an embodiment of the present invention;

FIG. 9 is a plan view of a jackscrew bolt of an embodiment of the present invention mounted on a motor mounting surface;

FIG. 10 is a top plan view of an embodiment pump assembly support bracket of the present invention;

FIG. 11 is a front view layout of a pump body assembly support frame according to an embodiment of the present invention;

fig. 12 is a construction flow chart of an embodiment of the present invention.

In the drawings, the reference numerals and corresponding part names:

pump body 1, anchor bolt 2, base closing bolt 3, motor 4, water outlet flange 5, water drain pipe orifice flange 6, expansion joint 7, water drain pipe 8, base 9, anchor bolt preformed hole 10, seat pulp plate 11, wedge plate 12, impeller section 13, pump body closing bolt 14, impeller eye section 15, impeller section closing bolt 16, rib plate 17, packing 18, packing pressing plate 19, compression bolt 20, packing cylinder 21, impeller shaft upper section 22, coupler connecting bolt 23, dial gauge 24, coupler 25, motor shaft 26, support frame 27, jackscrew bolt 28, impeller shaft lower section 29, gland 30, impeller shaft coupler 31, gland bolt 32, stop key 33, motor shaft nut 35, impeller shaft adjustment nut 36, impeller 37, impeller shaft coupler assembly I, packing seal assembly II, motor shaft impeller shaft coupler assembly III.

Detailed Description

For the purpose of making apparent the objects, technical solutions and advantages of the present invention, the present invention will be further described in detail with reference to the following examples and the accompanying drawings, wherein the exemplary embodiments of the present invention and the descriptions thereof are for illustrating the present invention only and are not to be construed as limiting the present invention.

As shown in fig. 1 to 12, the present embodiment provides a method for installing a drain pump of a large dry dock, comprising the steps of:

the impeller shaft of the main drainage pump sequentially comprises an impeller shaft coupler assembly I, a packing seal assembly II and a motor shaft impeller shaft coupler assembly III from bottom to top;

(1) Before the pump body 1 is installed, roughening the concrete pouring surface, the concrete installation surface and the anchor bolt 2 holes, and removing sundries such as rubbish, sand and stone;

the position and the height of a base 9 of a main drainage pump are determined according to the height and the position of a drain pipe orifice flange 6 at a pit position, a seat slurry plate 11 is symmetrically poured around the center position of the base 9, as shown in fig. 2 and 3, the seat slurry plate 11 is fixed by grouting materials, the height is adjusted according to the height difference between the seat slurry plate 11 and the glass fiber reinforced plastic drain pipe orifice flange 6, after the grouting materials of the seat slurry plate 11 reach bearing strength, a wedge plate 12 for fine adjustment of the height and the level of the main drainage pump is arranged on the seat slurry plate 11, the seat slurry plate 11 provides a firm supporting surface for the wedge plate 12, the wedge plate 12 is kept stable and reliable, the seat slurry plate 11 in the embodiment is a basic steel plate for placing the wedge plate 12, and after the initial adjustment of the orientation and the height, the seat slurry plate 11 is poured and fixed by grouting;

in this embodiment, the wedge plate 12 includes an upper wedge plate 12 and a lower wedge plate 12, the upper wedge plate 12 is located at the top of the lower wedge plate 12, the top end of the upper wedge plate 12 and the bottom end of the lower wedge plate 12 are both planes, and the contact ends of the upper wedge plate 12 and the lower wedge plate 12 are inclined planes in wedge fit with each other;

(2) The main drainage pump consists of an impeller eye section 15, an impeller section 13, a pump body 1, an impeller assembly and a motor 4, the impeller eye section 15, the impeller section 13 and the pump body 1 are sequentially connected and assembled outside a machine pit from bottom to top to form a whole, and in combination with the illustration of fig. 10 and 11, a supporting frame 27 for supporting the main drainage pump is manufactured and assembled according to the outline dimension of the main drainage pump, a main drainage pump assembling site is selected, the supporting frame 27 is placed on the assembling site, and the impeller eye section 15, the impeller section 13 and the pump body 1 are assembled on the supporting frame 27 of the assembling site; the height of the supporting frame 27 is required to ensure that the impeller eye section 15 is in a suspended state and is not contacted with the ground after the pump body 1 is assembled;

when assembled, the components are as follows: the impeller section 13 and the impeller eye section 15 pass through the top end of the supporting frame 27, in this embodiment, a plurality of rib plates 17 are circumferentially arranged on the upper part of the impeller section 13 and on the outer side of the upper part, the rib plates 17 are fixedly welded with the impeller section 13, and the rib plates 17 of the impeller section 13 are supported and placed on the top end of the supporting frame 27.

Specific: placing the impeller eye section 15 on the ground in the middle of the support frame 27, hanging the impeller section 13 on the support frame 27, supporting the impeller section 13 by the rib plates 17 arranged in the circumferential direction, then installing a sealing ring at the bottom of the impeller section 13, lifting the impeller eye section 15 by using a crane or a lifting screw rod and the like, installing an impeller section fastening bolt 16 between the impeller eye section 15 and the impeller section 13, and screwing the impeller section fastening bolt 16 to enable flange surfaces of the impeller eye section 15 and the impeller section 13 to be tightly attached;

continuing to install a sealing ring on the flange surface at the top of the impeller section 13, hoisting the pump body 1 to the flange at the top of the impeller section 13 placed on the support frame 27 by using a crane, aligning the flange with the bolt hole, slowly lowering the pump body 1, enabling the flanges of the pump body 1 and the flange to be orderly overlapped, and then screwing the pump body fastening bolt 14, wherein the shell assembled by the pump body 1 is connected;

the impeller assembly is arranged in the main drainage pump, namely after the shells of the pump body 1, the impeller section 13 and the impeller eye section 15 are connected, the impeller assembly in the pump body 1 is continuously arranged in an assembly site, the impeller assembly comprises an impeller 37 and an impeller shaft, the impeller shaft comprises an impeller shaft upper section 22 and an impeller shaft lower section 29, and the impeller 37 is fixedly connected with the impeller shaft lower section 29;

an impeller shaft coupling component I is connected between the impeller shaft upper section 22 and the impeller shaft lower section 29, the impeller shaft coupling component I comprises an impeller shaft coupling 31, a gland 30 and a gland bolt 32, an impeller 37 is positioned at the inner side of the impeller eye section 15, and when the impeller shaft is assembled, the bottom of the impeller 37 is placed on the shell of the impeller eye section 15, namely, is not in a suspended state;

the specific steps for mounting the impeller shaft, as shown in connection with fig. 5, are as follows:

(21) The gland 30 is sleeved at one end of the impeller shaft upper section 22 and the impeller shaft lower section 29 which are connected with each other;

(22) The impeller shaft coupling 31 of this embodiment is internally provided with internal threads, and the outer sides of the impeller shaft lower section 29 and the impeller shaft upper section 22 are provided with external threads, and the special impeller shaft lower section 29 is connected with the impeller shaft coupling 31 and the impeller shaft upper section 22 is connected with the impeller shaft coupling 31 by threads, specifically: screwing the impeller shaft lower section 29 into the lower part of the impeller shaft coupling 31, screwing the impeller shaft upper section 22 into the upper part of the impeller shaft coupling 31, and connecting the impeller shaft lower section 29 with the impeller shaft coupling 31 and the impeller shaft upper section 22 with the impeller shaft coupling 31 in a matched manner through an inserting key, namely, the impeller shaft coupling 31 is provided with two vertically opposite key grooves, the impeller shaft lower section 29 and the impeller shaft upper section 22 are also provided with two vertically opposite key grooves, after screwing the impeller shaft lower section 29 into the impeller shaft coupling 31, aligning the key grooves on the impeller shaft lower section 29 with the key grooves on the lower part of the impeller shaft coupling 31, inserting the stopping key 33 into the two key grooves, screwing the impeller shaft upper section 22 into the impeller shaft coupling 31, aligning the key grooves on the impeller shaft upper section 22 with the key grooves on the upper part of the impeller shaft coupling 31, and then inserting the stopping key 33 into the two key grooves, thereby stopping the screw threads between the shaft lower section 29 and the impeller shaft coupling 31 and the impeller shaft upper section 22 with the impeller shaft coupling 31;

(23) The gland 30 on the upper section 22 of the impeller shaft and the gland 30 on the lower section 29 of the impeller shaft are respectively screwed and fixed with the two ends of the impeller shaft coupling 31 through gland bolts 32, so as to complete the connection and assembly of the impeller shaft;

after the connection of the impeller shaft is completed, packing 18 sealing is started, a packing sealing component II is arranged on the outer side of the impeller shaft, the packing sealing component II comprises a packing pressing plate 19 and a packing cylinder 21, the packing cylinder 21 is sleeved on the outer side of the impeller shaft, a sealing groove is formed in a gap between the packing cylinder 21 and the impeller shaft, and the packing 18 sealing step in the embodiment is as follows:

(24) Calculating the length of the filler 18 to be sheared according to the diameter of the impeller shaft, so that the length of the filler 18 can be completely and annularly plugged into a gap between the filler barrel 21 and the impeller shaft;

(25) Filling the fillers 18 into the sealing grooves layer by layer in sequence from bottom to top, wherein the joint positions of each layer of the fillers 18 are staggered;

(26) Pressing one end of a packing pressing plate 19 into the sealing groove, fixing the packing pressing plate 19 and a packing cylinder 21 through a pressing bolt 20, uniformly pressing the packing 18 by screwing the packing pressing plate 19, and finishing the assembly of the pump body 1 outside the pit until the pump body 1 is lifted into the pit for preassembling;

(3) Placing the base 9 of the main drainage pump on the arranged wedge plate 12, hoisting and placing the pump body 1 of the main drainage pump assembled in the step (2) on the base 9, and connecting and fixing the closing bolt 3 with the base 9 through the base;

(4) The position and the elevation of the pump body 1 and the base 9 are finely adjusted by using the tools such as the wedge plate 12, a jack and the like and taking the water outlet flange 5 of the pump body 1 as the reference (at the moment, the pump body 1 and the base 9 are connected into a whole) so that the central axis of the water outlet flange 5 is consistent with the central axis of the glass fiber reinforced plastic water outlet pipe flange 6, and then the upper plane level of the top of the pump body 1 is continuously finely adjusted by using the wedge plate 12 until the requirements are met;

(5) After the axes of the water outlet flange 5 of the main drainage pump and the water outlet flange 6 of the drainage pipe are checked to be consistent, and the level of the pump body 1 meets the requirements, grouting and pouring foundation bolts 2 on a base 9, after the grouting and pouring reaches a curing period, screwing nuts of the foundation bolts 2, checking whether the heights are consistent or not by using a level gauge in the embodiment, checking the torsion and pitch of the two flanges by using a steel plate ruler and an angle square, and finally ensuring that the axes of the two flanges are consistent;

(6) Removing the pump body 1 from the base 9, lifting the pump body 1 away, removing the connecting base connecting bolts 3 between the pump body 1 and the base 9, and lifting the pump body 1 away;

(7) After hanging away pump body 1, pour in milk to base 9, to this end pump body 1 with glass steel drain pipe 8 and the assembly correction of base 9 accomplish, wait that concrete reaches the formally installation of main drain pump after the maintenance period, wait that the grout concrete of base 9 reaches the maintenance period after, adorn pump body 1 back to base 9 and be connected fixedly with base 9, specifically:

a rubber sealing ring is arranged in a sealing groove on a base 9, the pump body 1 is hoisted back to the base 9, a base fastening bolt 3 is screwed down, the horizontal condition of a motor mounting surface at the top of the pump body 1 is detected, a jackscrew bolt 28 is arranged on the motor mounting surface, and hoisting of a motor 4 is prepared;

(8) The motor 4 is hoisted to the top mounting surface of the pump body 1 by using a crane, the fixing bolt hole of the top mounting surface of the pump body 1 is aligned, the fixing bolt is installed, the bolt is not required to be screwed at the moment, the motor shaft impeller shaft coupler assembly III comprises a coupler 25, a coupler connecting bolt 23, an impeller shaft adjusting nut 36 and a motor shaft nut 35, and after the motor 4 is installed in place, the motor shaft 26 is connected with an impeller shaft through the coupler 25, specifically:

as shown in fig. 8, the coupler 25 is divided into an upper part and a lower part, the upper end part of the coupler 25 is sleeved into the motor shaft 26, and the lower end part of the coupler 25 is sleeved into the upper section 22 of the impeller shaft; then the end screw of the motor shaft 26 is screwed with the motor shaft nut 35, the end screw of the impeller shaft upper section 22 is screwed with the impeller shaft adjusting nut 36, so that the motor shaft nut 35 is positioned at the end of the upper end part of the coupler 25, the impeller shaft adjusting screw is positioned at the top end of the lower end part of the coupler 25, and finally the upper end part of the coupler 25 is connected with the lower end part of the coupler 25 through the coupler connecting bolt 23, at the moment, the coupler connecting bolt 23 is slightly screwed after being installed, the screwing degree is ensured to ensure that the coupler connecting bolt 23 is attached with the coupler 25 after the impeller 37 is lifted to be in a suspended state (the impeller 37 is firstly placed on the shell inside the impeller eye section 15);

after the upper end part of the coupler 25 is connected with the lower end part of the coupler 25, the impeller 37 can be lifted to be in a suspended state, so that a gap is reserved between the impeller 37 and the shell of the impeller eye section 15, the impeller 37 can rotate freely at the later stage, and the height of the suspended state of the impeller 37 is adjusted as follows:

(81) Screwing the impeller shaft adjustment nut 36 onto the threaded rod end of the impeller shaft and then measuring the gap value between the upper flat surface of the impeller shaft adjustment nut 36 and the bottom surface of the upper end portion of the coupler 25 when the impeller 37 is resting on the casing of the impeller eye 15;

(82) Subtracting the height value in the suspended state from the clearance value according to the height value when the impeller 37 is lifted in the suspended state, wherein the height of the impeller shaft adjusting nut 36 needs to be screwed upwards at the screw rod at the end part of the impeller shaft;

(83) The impeller shaft adjusting nut 36 is screwed up to the calculated height, the clearance between the upper plane of the impeller shaft adjusting nut 36 and the lower plane of the upper end part of the coupler 25 is measured, and the clearance is the height at which the impeller 37 is lifted to a suspended state after the impeller 37 is tightly attached between the coupler 25 and the impeller shaft adjusting nut 36 by installing and screwing the impeller 37 on the coupler connecting bolt 23;

thus, the integral installation of the main drainage pump is completed;

in another embodiment, after the connection and installation are completed, the misalignment of the motor shaft is measured and the center of the motor is adjusted according to the measurement result, firstly, as shown in fig. 8 and fig. 9, a dial indicator is erected on the pump body casing, and the equally-divided measuring points are marked on the rotating shaft (including the motor shaft 26 and the coupler 25) according to the arrangement direction of the jackscrew bolts 28, specifically: in this embodiment, four jackscrew bolts 28 are provided, and the four jackscrew bolts 28 are uniformly and equally arranged on the motor mounting surface, and four measuring points are marked on the coupler 25 on the outer side of the motor shaft 26 to correspond to the four jackscrew bolts 28 one by one.

The impeller is stirred by manpower to rotate so as to drive the motor shaft to slowly rotate at a constant speed, when the dial indicator rotates to a mark point, a measured value is recorded until the shaft rotates for 360 degrees, the absolute swing degree value of the motor shaft is checked and recorded, the motor is reversely pushed by using the jackscrew bolt according to the maximum azimuth angle of the swing degree value (the jackscrew bolt is rotated so that the jackscrew bolt moves horizontally to play a role in pushing the motor), and when the motor is pushed, the displacement of the dial indicator monitoring motor is still erected, and the movement amount is 1/2 of the absolute swing degree value; note that before pushing the motor, the coupler connecting bolts of the impeller shaft and the motor shaft should be removed, and the impeller still rests on the shell of the impeller eye section;

after the motor 4 is pushed and regulated, the coupler connecting bolt 23 is installed again according to the method of the steps, the misalignment condition of the motor shaft 26 is measured and checked again, and the motor 4 is repeatedly measured and pushed until the axial deviation of the motor shaft 26 and the impeller shaft meets the requirement, and finally the coupler connecting bolt 23 is screwed;

(9) The water outlet flange 5 of the main drainage pump and the water outlet flange 6 of the water outlet pipe are connected with each other through an installation expansion joint, after the gap between the impeller 37 and the shell is checked at the bottom impeller eye section 15 to meet the requirement, the fixing bolt of the motor 4 is screwed down, so that the motor 4 is fixed on the installation surface at the top of the water pump, the installation of the main drainage pump is completed, and the connection between the main drainage pump and the glass fiber reinforced plastic water outlet pipe 8 is prepared, and the following steps are:

the expansion joint 7 is connected between the water outlet flange 5 of the main drainage pump and the glass fiber reinforced plastic drainage pipe orifice flange 6, the expansion joint 7 is hung into a gap between the water outlet flange 5 of the main drainage pump and the glass fiber reinforced plastic drainage pipe orifice flange 6 by using a crane, screw holes at the end parts of the expansion joint 7 are aligned with screw holes of the two flanges, the fastening bolts are symmetrically and uniformly screwed in a mounting manner, and the expansion joint 7 is stretched by screwing the fastening bolts to enable the expansion joint 7 to be tightly attached to the flanges at the two ends, so that the connection between the main drainage pump and the glass fiber reinforced plastic drainage pipe 8 is completed.

In the implementation process of the invention, attention should be paid to the fact that the arrangement of screw holes on the water outlet flange 5 and the glass fiber reinforced plastic water drain pipe orifice flange 6 should be checked in the installation process, and the screw holes correspond to the flange screw holes of the expansion joint 7. The method has the advantages of simple construction, full utilization of tools, equipment and materials in the field, avoidance of the influence of the embedded deviation of the glass fiber reinforced plastic drain pipe 8, reduction of the construction period extension caused by correction of the glass fiber reinforced plastic drain pipe 8, ensuring of the installation quality of the main drainage pump and the connection integrity with the glass fiber reinforced plastic drain pipe 8, reduction of the resource investment, shortening of the installation period of the main drainage pump, reduction of the construction cost, and simplicity and effectiveness.

The foregoing description of the embodiments has been provided for the purpose of illustrating the general principles of the invention, and is not meant to limit the scope of the invention, but to limit the invention to the particular embodiments, and any modifications, equivalents, improvements, etc. that fall within the spirit and principles of the invention are intended to be included within the scope of the invention.

Claims (10)

1. The installation method of the large dry dock draining pump is characterized by comprising the following steps of:

(1) Determining the position and the height of a base of the main drainage pump at the pit position according to the height and the position of a drain pipe orifice flange, symmetrically pouring a slurry seat plate around the center position of the base, and arranging a wedge plate for fine-adjusting the height and the level of the main drainage pump on the slurry seat plate;

(2) The main drainage pump consists of an impeller eye section, an impeller section, a pump body, an impeller assembly and a motor, wherein the impeller eye section, the impeller section and the pump body are sequentially connected and assembled from bottom to top outside a machine pit to form a whole, the impeller assembly is arranged inside the main drainage pump, and the impeller assembly of the impeller is continuously arranged at an assembly site and is subjected to packing sealing;

(3) Placing a base of the main drainage pump on the arranged wedge plate, placing a pump body of the main drainage pump assembled in the step (2) on the base and connecting the pump body with the base, assembling foundation bolts and nuts of the base on the base and placing the foundation bolts and nuts in foundation bolt reserved holes, and enabling an impeller eye section and an impeller section of the main drainage pump to penetrate through the base;

(4) The water outlet flange of the main drainage pump is adjusted by taking the azimuth and the elevation of the water outlet flange of the water outlet pipe as a reference through sliding the wedge plate, so that the water outlet flange of the main drainage pump is consistent with the central axis of the water outlet pipe flange;

(5) Checking that the axis of a water outlet flange of the main drainage pump is consistent with that of a water outlet flange of the drain pipe orifice, grouting and pouring an anchor bolt, and screwing the anchor bolt after the grouting and pouring reaches a maintenance period;

(6) Removing the pump body from the base and lifting the pump body away;

(7) Grouting and pouring the base, and after the grouting concrete of the base reaches a curing period, returning the pump body to the base and connecting and fixing the pump body and the base;

(8) Hoisting the motor to the top end of the pump body to connect the motor shaft with the impeller shaft, so as to complete the integral installation of the main drainage pump;

(9) The water outlet flange of the main drainage pump and the water outlet flange of the drain pipe orifice are connected with each other through an expansion joint.

2. The method of installing a large dry dock drainage pump of claim 1, wherein the upper and lower wedge plates are disposed on top of the lower wedge plate, the top and bottom ends of the upper and lower wedge plates are planar, and the ends of the upper and lower wedge plates contacting each other are inclined surfaces wedge-fitted with each other.

3. The method for installing a large dry dock drainage pump according to claim 1, wherein in the step (2), a support frame for supporting the main drainage pump is manufactured and assembled according to the external dimension of the main drainage pump, and a main drainage pump assembly site is selected, the support frame is placed at the assembly site, and the impeller eye section, the impeller section and the pump body are assembled on the support frame of the assembly site.

4. The method for installing a large dry dock drainage pump according to claim 3, wherein in the step (2), the impeller section and the impeller eye section pass through the top end of the supporting frame, a plurality of rib plates are circumferentially arranged on the upper part and the outer side of the impeller section, and the rib plate support of the impeller section is placed on the top end of the supporting frame.

5. The method of installing a large dry dock drain pump according to claim 1, wherein the impeller assembly includes an impeller and an impeller shaft, the impeller shaft includes an impeller shaft upper section and an impeller shaft lower section, the impeller is located inside the impeller eye section, an impeller shaft coupling assembly is connected between the impeller shaft upper section and the impeller shaft lower section, the impeller shaft coupling assembly includes an impeller shaft coupling and a gland, the specific steps of installing the impeller shaft in step (2) are as follows:

(21) The gland is sleeved at one end of the upper section of the impeller shaft and one end of the lower section of the impeller shaft, which are connected with each other;

(22) Screwing the lower section of the impeller shaft into the lower part of the impeller shaft coupler, and screwing the upper section of the impeller shaft into the upper part of the impeller shaft coupler;

(23) And connecting and fixing the gland on the upper section and the lower section of the impeller shaft with the two ends of the impeller shaft coupler respectively.

6. The method of installing a large dry dock drain pump according to claim 5, wherein the screw stop is performed between the lower section of the impeller shaft and the impeller shaft coupling and between the upper section of the impeller shaft and the impeller shaft coupling by screw connection and the mating connection of the insert key and the key slot by mating of the insert key and the key slot.

7. The method for installing a large dry dock drainage pump according to claim 1, wherein a packing assembly is provided on the outer side of the impeller shaft, the packing assembly comprises a packing platen and a packing cylinder, the packing cylinder is sleeved on the outer side of the impeller shaft, a gap between the packing cylinder and the impeller shaft forms a sealing groove, and the step of packing in the step (2) is as follows:

(24) Calculating the length of the filler to be sheared according to the diameter of the impeller shaft, so that the length of the filler can be annularly plugged into a gap between the filler cylinder and the impeller shaft;

(25) Filling the filling materials into the sealing grooves layer by layer in sequence from bottom to top;

(26) One end of the packing pressing plate is pressed into the sealing groove, and the packing pressing plate is fixed with the packing cylinder.

8. The method of installing a large dry dock drain pump of claim 7, wherein the joint locations of each layer of filler are offset from each other.

9. The method for installing a large dry dock drainage pump according to claim 1, wherein in the step (8), a motor is hoisted to a top installation surface of a pump body and aligned to a fixing bolt hole of the installation surface, after the motor is in place, a motor shaft and an impeller shaft are connected through a coupler, the upper end part of the coupler is sleeved into the motor shaft, and the lower end part of the coupler is sleeved into the impeller shaft; then a motor shaft nut is screwed into the screw rod at the end part of the motor shaft, and an impeller shaft adjusting nut is screwed into the screw rod at the end part of the impeller shaft; and finally, fixedly connecting the upper end part of the coupler with the lower end part of the coupler, and then fixing the motor with the top mounting surface of the pump body through a fixing bolt.

10. The method of installing a large dry dock drain pump according to claim 9, wherein after the upper end portion of the coupler is connected to the lower end portion of the coupler, the impeller is lifted to be in a suspended state, so that a gap is formed between the impeller and the housing of the eye section of the impeller, and the step of adjusting the height of the suspended state of the impeller is as follows:

(81) Screwing the impeller shaft adjusting nut onto the threaded rod end of the impeller shaft, and then measuring the gap value between the upper plane of the impeller shaft adjusting nut and the bottom surface of the upper end part of the coupler when the impeller is placed on the shell of the impeller eye section;

(82) Subtracting the height value in the suspended state from the clearance value according to the height value when the impeller lifts the suspended state, wherein the height of the impeller shaft adjusting nut, which is required to be screwed upwards, is required to be screwed on the screw at the end part of the impeller shaft;

(83) The impeller shaft adjustment nut is threaded up to the calculated height.