CN112355184A - Fire pump assembly equipment and assembly process thereof - Google Patents

Abstract

The invention relates to fire pump assembly equipment and an assembly process, which comprise a workbench, wherein a driving device and a counting device for controlling the starting and stopping of the driving device are arranged on the workbench; the core body is provided with a plurality of groups of winding grooves; the pay-off device comprises a pay-off bracket which is arranged right opposite to the winding die, a fixed platform which is arranged between the pay-off bracket and the winding die, a wire collecting assembly which is arranged on the fixed platform in a sliding mode and is sequentially aligned with a plurality of groups of winding grooves, a limiting assembly which is rotatably arranged in the fixed platform and is abutted against the wire collecting assembly, and a control assembly which is in transmission connection with the limiting assembly and the winding die; the winding device comprises a clamping plate assembly which is arranged on the line concentration assembly in an up-and-down sliding mode and a power assembly which is in power connection with the control assembly.

Description

Fire pump assembly equipment and assembly process thereof

Technical Field

The invention relates to the field of pump production, in particular to fire pump assembly equipment.

Background

The fire pump is fire extinguishing system's a necessary equipment, can increase pressure, supply water source and supplementary foam to can reach the purpose of putting out a fire, the fire pump comprises motor, the pump body and impeller, and wherein the production of motor coil mostly needs the manual work to carry out the coiling, and the not compact phenomenon easily appears in the coil of artifical coiling, influences the motor quality, and then influences the quality of fire pump, and artifical coiling coil is inefficient.

The invention patent with Chinese patent application number of CN201610855337.X discloses an automatic coil winding device, which comprises a rack, a winding main shaft and a winding framework fixed on the winding main shaft, wherein one side of the winding main shaft is provided with a wire barrel for supplying wires and a wire leading mechanism, the wire leading mechanism comprises a fixing mechanism for fixing the wire head extracted from the wire barrel and a first driving mechanism for driving the fixing mechanism to rotate from one side of the main shaft to the other side, the other side of the main shaft is provided with a clamping mechanism for clamping the wire head on the fixing device, the winding device further comprises an adhesive tape sealing mechanism for fixing the wires on the winding framework, and the winding device further comprises a controller for controlling the wire leading mechanism and the clamping mechanism.

However, the invention fixes the winding point to prevent the coil from loosening, and can not ensure that the coil cannot be loosened in the winding process.

Disclosure of Invention

In view of the above problems, an object of the present invention is to provide a fire pump assembly apparatus, which enables a winding groove to wind a certain number of turns, and drives a wire collecting assembly to move to align with a next winding groove through the cooperation of a control assembly and a limiting assembly until all windings in the winding grooves are completely wound, and a clamping plate assembly pulls a wire harness at intervals under the action of a power assembly while each winding groove winds the wire, so that the coil wound in the winding groove is more compact, and the quality of a motor and a fire pump can be improved while the subsequent motor and fire pump assembly is facilitated.

In order to achieve the purpose, the invention provides the following technical scheme:

the utility model provides a fire pump equipment, includes the workstation, be provided with drive arrangement on the workstation and control this drive arrangement and open the counting assembly who stops, include:

the winding die comprises a mounting frame fixedly connected with the driving device and a core body fixedly mounted on the mounting frame; the core body is provided with a plurality of groups of winding grooves;

the paying-off device comprises a paying-off support which is arranged right opposite to a winding die, a fixed table which is arranged between the paying-off support and the winding die, a wire collecting assembly which is arranged on the fixed table in a sliding mode and is sequentially aligned with a plurality of groups of winding grooves, a limiting assembly which is rotatably arranged in the fixed table and is abutted against the wire collecting assembly, and a control assembly which is in transmission connection with the limiting assembly and the winding die; and

and the pulling device comprises a clamping plate assembly which is arranged on the line concentration assembly in an up-and-down sliding manner and a power assembly which is in power connection with the control assembly.

As an improvement, the plurality of groups of winding grooves are coaxially arranged and are all arranged in a runway shape, and the inner diameters of the plurality of groups of winding grooves are sequentially increased along the axis of the mounting rack towards the direction far away from the workbench.

As an improvement, a plurality of groups of wire guiding rollers for guiding wires are rotatably arranged on the pay-off bracket, and a plurality of groups of coiled wires are placed at the bottom of the pay-off bracket.

As an improvement, the wire collecting assembly comprises a sliding seat arranged on the fixed table in a sliding manner, a wire guiding barrel fixedly arranged on the sliding seat and capable of aligning with the wire winding groove, a fixed plate fixedly arranged at one end of the fixed table in the length direction, and a spring a elastically connecting the sliding seat and the fixed plate.

As an improvement, the limiting assembly comprises a plurality of groups of limiting blocks arrayed along the length direction of the fixed table and arranged on the fixed table in a vertically sliding manner, a convex block a correspondingly and fixedly arranged at the bottom of the limiting block 541, a rotating shaft rotatably arranged in the fixed table, and a convex block b which is arranged on the rotating shaft in a spiral array and is tangent to the convex block a in a one-to-one correspondence manner; the lug b and the lug a can be arranged in an abutting mode.

As an improvement, the control assembly comprises a gear coaxially fixed with the rotating shaft, a missing tooth rotatably installed on one side of the gear and capable of being meshed with the gear, and a belt pulley assembly a in transmission connection with the missing tooth and the mounting rack.

As an improvement, the clamping plate assembly comprises an ejector rod arranged on the side wall of the guide wire barrel in a radial elastic sliding manner, a clamping plate fixedly arranged on the ejector rod and arranged in the guide wire barrel, a traverse plate arranged above the guide wire barrel in an elastic sliding manner along the length direction of the fixing table, a fixing block fixedly arranged at one end of the traverse plate, and a plurality of groups of convex blocks c which are arrayed at the bottom of the traverse plate along the length direction of the traverse plate and can be abutted against the ejector rod.

As an improvement, the power assembly comprises a rotary table rotatably mounted on one side of the fixed table, a plurality of groups of convex blocks d arranged on the rotary table in a circumferential array and capable of being abutted against the fixed block, and a belt pulley assembly b in transmission connection with the rotary table and the control assembly.

Aiming at the defects of the prior art, the invention provides a fire pump assembly process, which comprises the following steps:

the method comprises the following steps: paying off, wherein a plurality of wires which are combined into a coil are placed below a paying-off support, then the wires in each enameled wire are respectively wound around a wire roller and pass through a wire barrel which is opposite to a winding groove positioned at the edge to form a wire harness, the end part of the wire harness is fixed in the winding groove, then a driving device drives the mounting frame to rotate for a plurality of circles, and the wire harness is wound in the winding groove;

step two: the wire straightening is carried out simultaneously with the steps, the mounting frame rotates to drive the rotary table to rotate, the plurality of lugs d sequentially abut against the transverse moving plate and drive the transverse moving plate to move in a reciprocating mode, and then the ejector rods continuously abut against the lugs c, so that the clamping plates move downwards at intervals and are matched with the wire guide barrel to pull the wire harness;

step three: switching the winding slots, namely after the first step, rotating the missing teeth and driving the gear to rotate for a certain angle so as to drive the rotating shaft to rotate for a certain angle, so that the lug a and the lug b which are in a collision state are disengaged, the next lug a and the lug b are in collision fit, the sliding seat moves to be in collision with the next limiting block, and the wire guide cylinder moves to be aligned with the next winding slot;

step four: assembling a motor; after the step one and the step are repeated for a plurality of times, a worker assembles the coil which is wound with the wire and the stator iron core to form a stator winding, and then the stator winding is installed in the motor;

step five: assembling a fire pump; and after the third step, the worker assembles the motor, the impeller and the pump shell to form the fire pump.

The invention has the beneficial effects that:

(1) when the winding of each winding groove is finished, the rotating shaft can rotate for a certain angle through the matching of the missing teeth and the gears, so that the wire cylinder is aligned with the next winding groove and the wire is wound until all the winding grooves are wound with the wire, and the automatic winding of the coil is realized through the matching of the counting device, so that the production efficiency of the coil is greatly improved;

(2) when each winding groove is used for winding wires, the winding die rotates and drives the transverse moving plate to perform reciprocating transverse movement, so that the ejector rod is abutted against the lug c, the clamping plate moves downwards at intervals to form an extrusion part with the wire guide cylinder to pull the wire harness, the wound coil is compact, the coil is prevented from being loose, the assembly efficiency of the motor is improved, and the quality of the fire pump is improved;

(3) the wire harness formed by the wire rods under the action of the wire guide roller has no knotting phenomenon, so that the quality of the coil is improved, and the quality of the fire pump is further improved.

In conclusion, the motor coil winding device has the advantages of simple structure, ingenious design, high winding efficiency, high quality of the produced fire pump and the like, and is particularly suitable for production of the motor coil of the fire pump.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is an enlarged view of FIG. 1 at A;

FIG. 3 is an enlarged view of FIG. 1 at B;

FIG. 4 is a diagram of a winding state;

FIG. 5 is an enlarged view at C of FIG. 4;

FIG. 6 is a sectional view of the stationary platen;

FIG. 7 is an enlarged view of FIG. 6 at D;

FIG. 8 is a schematic view of the structure of the rotating shaft;

FIG. 9 is a schematic side view of the rotating shaft;

FIG. 10 is a cross-sectional structural view of the cleat assembly;

FIG. 11 is an enlarged view at E of FIG. 10;

FIG. 12 is a schematic view of the power assembly;

FIG. 13 is a process flow diagram of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

The first embodiment is as follows:

as shown in fig. 1, a fire pump equipment, includes workstation 1, be provided with drive arrangement 2 and control this drive arrangement 2 on workstation 1 and open counting assembly 3 who stops, include:

the winding die 4 comprises a mounting frame 41 fixedly connected with the driving device 2 and a core body 42 fixedly mounted on the mounting frame 41; the core body 42 is provided with a plurality of groups of winding grooves 421;

the paying-off device 5 comprises a paying-off support 51 arranged right opposite to a winding mold 4, a fixed table 52 arranged between the paying-off support 51 and the winding mold 4, a wire collecting assembly 53 arranged on the fixed table 52 in a sliding mode and sequentially aligned with a plurality of groups of winding grooves 421, a limiting assembly 54 rotatably arranged in the fixed table 52 and abutted against the wire collecting assembly 53, and a control assembly 55 in transmission connection with the limiting assembly 54 and the winding mold 4; and

the pulling device 6 comprises a clamping plate component 61 which is arranged on the wire collecting component 53 in a vertically sliding mode and a power component 62 which is in power connection with the control component 55.

The fire pump 7 includes a motor 8, a pump housing 9, and an impeller 11, a stator winding 81 is provided in the motor 8, and the stator winding 81 includes an iron core 811 and a coil 812 wound around the iron core 811.

Further, as shown in fig. 3 and 4, a plurality of groups of winding slots 421 are coaxially arranged and all arranged in a track shape, and the inner diameters of the plurality of groups of winding slots 421 sequentially increase along the axis of the mounting frame 41 toward the direction away from the workbench 1.

Further, a plurality of groups of guide rollers 511 for guiding the wires are rotatably mounted on the pay-off bracket 51, and a plurality of groups of wires are placed at the bottom of the pay-off bracket 51.

The wire material for winding the coil 812 is an enameled wire.

More specifically, a coiled wire is placed under the pay-off stand 51, and in use, the wire is wound around the guide rollers 511, and one guide roller 511 corresponds to one wire.

Further, the wire-collecting assembly 53 includes a sliding seat 531 slidably disposed on the fixed base 52, a wire guiding cylinder 532 fixedly mounted on the sliding seat 531 and alignable with the wire winding slot 421, a fixed plate 533 fixedly mounted on one end of the fixed base 52 in the length direction, and a spring a534 elastically connecting the sliding seat 531 and the fixed plate 533.

It should be noted that, as shown in fig. 4 and 5, several groups of wires are passed through the wire barrel 532 to form a wire harness.

Further, as shown in fig. 6 to 9, the position limiting assembly 54 includes a plurality of sets of position limiting blocks 541 arrayed along the length direction of the fixed platform 52 and slidably disposed on the fixed platform 52 up and down, a protruding block a542 correspondingly and fixedly mounted at the bottom of the position limiting blocks 541, a rotating shaft 543 rotatably mounted in the fixed platform 52, and a protruding block b544 cut on the rotating shaft 543 in a spiral array and disposed in one-to-one correspondence with the protruding block a 542; the projection b544 and the projection a542 may be disposed in an abutting manner.

Further, as shown in fig. 11, the control assembly 55 includes a gear 551 coaxially fixed with the rotation shaft 543, a missing tooth 552 rotatably installed at one side of the gear 551 and capable of meshing with the gear 551, and a pulley assembly a553 drivingly connecting the missing tooth 552 and the mounting bracket 41.

It should be noted that, after the winding mold 4 rotates, after one winding slot 421 finishes winding, the belt pulley assembly a553 drives the missing tooth 552 to rotate, so that the tooth portion of the missing tooth 552 drives the gear 551 and the rotating shaft 543 to rotate by 45 °, under the rotation action of the rotating shaft 543, the bump a542 and the bump b544 which are in interference fit are disengaged, meanwhile, the next bump a542 and the bump b544 are in interference fit, and drive the stopper 541 corresponding to the bump a542 to move upwards, under the action of the spring a534, the sliding seat 531 moves to be in interference with the stopper 541 protruding out of the fixed table 52, so that the wire guide cylinder 532 is aligned with the next winding slot, and then the mounting bracket 41 rotates to wind the next winding slot 421.

Further, as shown in fig. 2, 10 and 11, the clamp plate assembly 61 includes a top bar 611 disposed on a side wall of the guide tube 532 and elastically sliding in a radial direction, a clamp plate 612 fixedly mounted on the top bar 611 and disposed inside the guide tube 532, a traverse plate 613 disposed above the guide tube 532 and elastically sliding in a longitudinal direction of the fixing table 52, a fixing block 614 fixedly mounted on one end of the traverse plate 613, and a plurality of sets of protrusions c615 arranged at a bottom of the traverse plate 613 in the longitudinal direction of the traverse plate 613 and abutting against the top bar 611.

Further, as shown in fig. 12, the power assembly 62 includes a rotating disc 621 rotatably mounted on one side of the fixed table 52, a plurality of sets of protrusions d622 circumferentially arrayed on the rotating disc 621 and configured to abut against the fixed block 614, and a pulley assembly b623 drivingly connecting the rotating disc 621 and the control assembly 55.

Note that, the pulley assembly b623 is in power connection with the pulley assembly a 553.

It should be further noted that, while the mounting bracket 41 rotates to drive the winding slot 421 to wind a wire, under the action of the pulley assembly a553 and the pulley assembly b623, the turntable 621 rotates, and then a plurality of groups of the bumps d622 continuously abut against the fixed block 614 to further drive the traverse plate 613 to traverse reciprocally, and further the push rod 611 alternately abuts against the bump c615 to further achieve the up-and-down movement of the clamp plate 612, and the clamp plate 612 cooperates with the guide cylinder 532 to pull a wire bundle, so that the wire bundle wound in the winding slot 421 is tighter and tighter.

It is important to note that one winding slot 421 corresponds to one bump c615, which ensures that the wire harness is pulled when each winding slot 421 is wound.

It is worth mentioning that the bottom of the clamping plate 612 is made of a flexible material, so that the wire can be prevented from being scratched. Example two:

as shown in fig. 13, a fire pump assembly process according to a second embodiment of the present invention is described with reference to the first embodiment, and includes the following steps:

the method comprises the following steps: paying off, wherein a plurality of wires which are combined into a coil are placed below a paying-off support 51, then the wires in each enameled wire are respectively wound around one wire roller 511 and pass through a wire barrel 532 which is opposite to a wire winding groove 421 positioned at the edge to form a wire harness, the end part of the wire harness is fixed in the wire winding groove 421, then a driving device 2 drives the mounting frame 41 to rotate for a plurality of circles, and the wire harness is wound in the wire winding groove 421;

step two: the wire smoothing is carried out simultaneously with the steps, the mounting frame 41 rotates to drive the rotary disc 621 to rotate, the plurality of lugs d622 sequentially abut against the traverse plate 613 and drive the traverse plate 613 to reciprocate, and then the ejector rod 611 continuously abuts against the lugs c615, so that the clamping plate 612 moves downwards at intervals to cooperate with the wire barrel 532 to pull the wire harness;

step three: after the first step, the missing tooth 552 rotates and the driving gear 551 rotates by a certain angle, so as to drive the rotating shaft 543 to rotate by a certain angle, so that the bump a542 and the bump b544 in the abutting state are disengaged, the next bump a542 and the next bump b544 are in abutting engagement, the sliding seat 531 moves to abut against the next limiting block 541, and the wire guide cylinder 532 moves to be aligned with the next wire winding groove 421;

step four: assembling a motor; after the step one and the step are repeated for a plurality of times, a worker assembles the coil which is wound with the wire and the stator iron core to form a stator winding, and then the stator winding is installed in the motor;

step five: assembling a fire pump; and after the third step, the worker assembles the motor, the impeller and the pump shell to form the fire pump.

It should be noted that step four and step five are both completed manually.

The working process is as follows:

a plurality of wires wind around the wire roller 511 and converge into a wire harness in the wire barrel 532, then the wire harness is fixed in the wire winding groove 421 at the extreme edge, then the wire harness is wound in the wire winding groove 421 by the mounting bracket 41, at the same time, the mounting bracket 41 drives the missing tooth 552 to rotate through the pulley assembly a553, after the mounting bracket 41 rotates for a plurality of circles, the tooth part of the missing tooth 552 drives the gear 551 to rotate 45 degrees, the bump a542 and the bump b544 which are in interference fit are disengaged, at the same time, the next bump a542 and the bump b544 are in interference fit and drive the limit block 541 corresponding to the bump a542 to move upwards, under the action of the spring a534, the sliding seat 531 moves to be in interference with the limit block 541 protruding out of the fixed table 52, and then the wire barrel 532 is aligned with the next wire winding groove 421, the mounting frame 41 continuously rotates, the next winding groove 421 winds, and in the process of winding in each winding groove 421, the pulley assembly a553 and the pulley assembly b623 rotate the turntable 621, so that the plurality of groups of the bumps d622 continuously collide with the fixing block 614, the traverse plate 613 is driven to move transversely in a reciprocating manner, the ejector rods 611 alternately collide with the bumps c615, the clamp plate 612 is driven to move vertically, and the clamp plate 612 cooperates with the guide wire cylinders 532 to pull the wire bundles.

Claims (9)

1. The utility model provides a fire pump equipment, includes workstation (1), be provided with drive arrangement (2) and control counting assembly (3) that this drive arrangement (2) of control opened and stop on workstation (1), its characterized in that includes:

the winding die (4) comprises a mounting frame (41) fixedly connected with the driving device (2) and a core body (42) fixedly mounted on the mounting frame (41); the core body (42) is provided with a plurality of groups of winding grooves (421);

the paying-off device (5) comprises a paying-off support (51) which is arranged right opposite to a winding die (4), a fixing table (52) which is arranged between the paying-off support (51) and the winding die (4), a wire collecting assembly (53) which is arranged on the fixing table (52) in a sliding mode and is sequentially aligned with a plurality of groups of winding grooves (421), a limiting assembly (54) which is rotatably arranged in the fixing table (52) and is abutted against the wire collecting assembly (53), and a control assembly (55) which is in transmission connection with the limiting assembly (54) and the winding die (4); and

and the pulling device (6) comprises a clamping plate component (61) which is arranged on the line concentration component (53) in a vertically sliding mode and a power component (62) which is in power connection with the control component (55).

2. A fire pump assembly apparatus as claimed in claim 1, wherein the groups of winding grooves (421) are coaxially arranged and are arranged in a race track shape, and the inner diameters of the groups of winding grooves (421) increase in sequence along the axis of the mounting bracket (41) in a direction away from the working platform (1).

3. A fire pump assembly apparatus as claimed in claim 1, wherein the pay-off bracket (51) is rotatably mounted with sets of wire guide rollers (511) for guiding wires, and the bottom of the pay-off bracket (51) is placed with the sets of wires.

4. A fire pump assembling apparatus as claimed in claim 1, wherein the wire trap assembly (53) comprises a sliding seat (531) slidably provided on the fixed base (52), a wire barrel (532) fixedly installed on the sliding seat (531) and alignable with the wire winding groove (421), a fixed plate (533) fixedly installed at one end of the fixed base (52) in a length direction, and a spring a (534) elastically connecting the sliding seat (531) and the fixed plate (533).

5. A fire pump assembly device as claimed in claim 4, wherein the limit assembly (54) comprises a plurality of sets of limit blocks (541) which are arrayed along the length direction of the fixed table (52) and are arranged on the fixed table (52) in a vertically sliding manner, a plurality of convex blocks a (542) which are correspondingly and fixedly arranged at the bottoms of the limit blocks (541), a rotating shaft (543) which is rotatably arranged in the fixed table (52), and a plurality of convex blocks b (544) which are spirally arrayed on the rotating shaft (543) and are arranged in one-to-one correspondence with the convex blocks a (542); the projection b (544) and the projection a (542) can be arranged in an interference mode.

6. A fire pump assembly apparatus as claimed in claim 5, wherein the control assembly (55) comprises a gear (551) fixed coaxially with the shaft (543), a missing tooth (552) rotatably mounted on one side of the gear (551) and arranged to be engageable with the gear (551), and a pulley assembly a (553) drivingly connecting the missing tooth (552) and the mounting bracket (41).

7. A fire pump assembly apparatus as claimed in claim 4, wherein the cleat assembly (61) comprises a push rod (611) provided on a side wall of the wire barrel (532) to elastically slide in a radial direction thereof, a cleat (612) fixedly mounted on the push rod (611) and disposed inside the wire barrel (532), a traverse plate (613) provided above the wire barrel (532) to elastically slide in a length direction of the fixed table (52), a fixed block (614) fixedly mounted on an end of the traverse plate (613), and a plurality of sets of protrusions c (615) arranged at a bottom of the traverse plate (613) in an interference manner with the push rod (611) in the length direction of the traverse plate (613).

8. A fire pump assembly apparatus as claimed in claim 7, wherein the power assembly (62) comprises a turntable (621) rotatably mounted on one side of the stationary table (52), sets of projections d (622) circumferentially arrayed on the turntable (621) and arranged to interfere with the stationary block (614), and a pulley assembly b (623) drivingly connecting the turntable (621) and the control assembly (55).

9. A fire pump assembly process is characterized by comprising the following steps:

the method comprises the following steps: paying off, wherein a plurality of wires which are combined into a coil are placed below a paying-off support (51), then the wires in each enameled wire are respectively wound around a wire roller (511) and pass through a wire barrel (532) which is opposite to a winding groove (421) positioned at the edge to form a wire harness, the end part of the wire harness is fixed in the winding groove (421), then a driving device (2) drives the mounting frame (41) to rotate for a plurality of circles, and the wire harness is wound in the winding groove (421);

step two: the wire straightening is carried out simultaneously with the steps, the mounting frame (41) rotates to drive the rotary disc (621) to rotate, the plurality of lugs d (622) sequentially abut against the transverse moving plate (613) and drive the transverse moving plate (613) to reciprocate, and then the ejector rods (611) continuously abut against the lugs c (615), so that the clamping plate (612) moves downwards at intervals and is matched with the wire guide barrel (532) to pull the wire bundle;

step three: the winding slots are switched, after the first step, the toothless part (552) rotates and drives the gear (551) to rotate for a certain angle, and further the rotating shaft (543) is driven to rotate for a certain angle, so that the lug a (542) and the lug b (544) in the abutting state are disengaged, the next lug a (542) and the lug b (544) are in abutting fit, the sliding seat (531) moves to abut against the next limiting block (541), and the wire guide cylinder (532) moves to be aligned with the next winding slot (421);

step four: assembling a motor; after the step one and the step are repeated for a plurality of times, a worker assembles the coil which is wound with the wire and the stator iron core to form a stator winding, and then the stator winding is installed in the motor;

step five: assembling a fire pump; and after the third step, the worker assembles the motor, the impeller and the pump shell to form the fire pump.

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