WO2022078158A1

WO2022078158A1 - Fire pump assembling apparatus, and assembly process therefor

Info

Publication number: WO2022078158A1
Application number: PCT/CN2021/119254
Authority: WO
Inventors: 钟军
Original assignee: 莫诺特泵业(集团)有限公司
Priority date: 2020-10-14
Filing date: 2021-09-18
Publication date: 2022-04-21
Also published as: CN112355184B; CN112355184A

Abstract

A fire pump assembling apparatus and an assembly process therefor. The assembling apparatus comprises a workbench (1), wherein a driving device (2) and a counting device (3) for controlling the driving device (2) to be started and stopped are arranged on the workbench (1); and the assembling apparatus further comprises a winding mold (4), an unwinding device (5) and a pulling device (6). The winding mold (4) comprises a mounting frame (41) fixedly connected to the driving device (2), and a core body (42) fixedly mounted on the mounting frame (41), with several groups of winding grooves (421) being provided on the core body (42). The unwinding device (5) comprises an unwinding support (51) arranged exactly opposite the winding mold (4), a fixing table (52) arranged between the unwinding support (51) and the winding mold (4), a wire concentration assembly (53) slidably arranged on the fixing table (52) and sequentially aligned with the several groups of winding grooves (421), a limiting assembly (54) rotatably mounted in the fixing table (52) and abutted against the wire concentration assembly (53), and a control assembly (55) in transmission connection with the limiting assembly (54) and the winding mold (4). The pulling device (6) comprises a clamping plate assembly (61) vertically and slidably arranged on the line concentration assembly (53), and a power assembly (62) in power connection with the control assembly (55).

Description

A kind of fire pump assembly equipment and its assembly process

technical field

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

Background technique

The fire pump is a necessary equipment for the fire protection system, which can increase the pressure, supplement the water source and supplement the foam, so as to achieve the purpose of extinguishing the fire. The fire pump is composed of a motor, a pump body and an impeller, and the production of the motor coil is mostly manual. Winding, the artificially wound coil is prone to the phenomenon of incompactness, which affects the quality of the motor, which in turn affects the quality of the fire pump, and the efficiency of the manual winding of the coil is low.

The invention patent with the Chinese patent application number CN201610855337.X discloses an automatic coil winding device, which includes a frame, a winding spindle and a winding skeleton fixed on the winding spindle. One side of the winding spindle is provided with a wire supplying device. The bobbin and the lead mechanism, the lead mechanism includes a fixing mechanism for fixing the thread end drawn from the bobbin and a first driving mechanism for driving the fixing mechanism to rotate from one side of the main shaft to the other side, and the other side of the main shaft is provided with a clamping device for clamping The clamping mechanism of the wire head on the fixing device, the winding device also includes a tape sealing mechanism for fixing the wire on the winding frame, and the winding device also includes a controller for controlling the lead mechanism and the clamping mechanism. The invented coil automatic winding device does not need manual participation in the whole winding process, has a high degree of automation and high production efficiency.

However, the invention fixes the winding head to prevent the coil from loosening, and cannot guarantee that the coil will not loosen during the winding process.

technical problem

In view of the above problems, one of the objectives of the present invention is to provide a fire pump assembling equipment, which makes a winding slot wound a certain number of turns, and drives the hub assembly to move to the lower position through the cooperation of the control assembly and the limit assembly. A winding slot is aligned until all winding slots are wound, and each winding slot is wound while the splint assembly pulls the wire harness at intervals under the action of the power assembly, so that the wires wound in the winding slot are The coil is more compact, which facilitates the subsequent assembly of the motor and fire pump, and improves the quality of the motor and fire pump.

To achieve the above object, the present invention provides the following technical solutions:

A fire pump assembly equipment, including a workbench, a drive device and a counting device for controlling the start and stop of the drive device are arranged on the workbench, including:

a winding die, 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 several groups of winding grooves;

A pay-off device, the pay-off device comprises a pay-off bracket arranged facing the winding die, a fixing table arranged between the wire-paying bracket and the winding die, slidably arranged on the fixing table and connected with the winding die. A plurality of sets of wire-collecting assemblies aligned with the wire-winding grooves in sequence, a limiter assembly rotatably installed in the fixing table and arranged in conflict with the wire-collection assembly, and a drive connecting the limiter assembly and the wire-winding die. control components; and

A pulling device includes a splint assembly that is slid up and down on the hub assembly and a power assembly that is dynamically connected to the control assembly.

As an improvement, several groups of the wire winding grooves are arranged coaxially and are all set in a racetrack shape, and the inner diameters of the several groups of the wire winding grooves are sequentially increased along the axis of the mounting frame in a direction away from the workbench.

As an improvement, several groups of wire rollers for guiding wires are rotatably installed on the pay-off support, and several coils of wires are placed at the bottom of the pay-off support.

As an improvement, the wire hub assembly includes a sliding seat slidably arranged on the fixing table, a wire barrel fixedly installed on the sliding seat and alignable with the wire winding groove, and a wire barrel fixedly installed on the fixing table A fixed plate at one end in the longitudinal direction and a spring a that elastically connects the sliding seat and the fixed plate.

As an improvement, the limit assembly includes several sets of limit blocks arranged in an array along the length of the fixed table and slid up and down on the fixed table; The rotating shaft and the helical array installed in the fixing table cut bumps b on the rotating shaft which are arranged in a one-to-one correspondence with the bumps a; the bumps b and the bumps a can be set against each other.

As an improvement, the control assembly includes a gear coaxially fixed with the rotating shaft, a missing tooth that is rotatably mounted on one side of the gear and can be meshed with the gear, and a gear that drives the missing tooth and the mounting bracket. Pulley assembly a.

As an improvement, the splint assembly includes an ejector rod elastically slidably arranged on the side wall of the wire barrel along the longitudinal direction of the wire barrel, a plywood fixedly installed on the ejector rod and arranged inside the wire barrel, A traverse plate elastically slidably arranged above the wire barrel in the longitudinal direction, a fixed block fixedly installed at one end of the traverse plate, and arrayed at the bottom of the traverse plate along the length direction of the traverse plate and connected to the top of the traverse plate The rod can interfere with several sets of projections c provided.

As an improvement, the power assembly includes a turntable rotatably mounted on one side of the fixing table, a plurality of groups of projections d circumferentially arrayed on the turntable and arranged in conflict with the fixing blocks, and drively connecting the turntable and all The pulley assembly b of the control assembly.

The second purpose of the present invention is to aim at the deficiencies of the prior art, and provide a fire pump assembly process, comprising the following steps:

Step 1: Paying off, placing a number of coiled wires under the pay-off support, and then passing the wires in each roll of enameled wire around a wire roller and passing through the wire barrel facing the wire winding groove at the edge to form a wire bundle, The end of the wire harness is fixed in the wire winding slot, and then the driving device drives the mounting frame to rotate several times, and the wire harness is wound in the wire winding slot;

Step 2: Stretch the wire, which is carried out at the same time as step 1. The rotation of the mounting frame drives the turntable to rotate, and several bumps d are in contact with the traverse plate in sequence and drive the traverse plate to reciprocate. The block c continuously interferes, so that the splint moves downward at intervals and cooperates with the wire barrel to pull the wire harness;

Step 3: Switch the winding slot. After step 1, the missing tooth rotates and drives the gear to rotate at a certain angle, which in turn drives the rotating shaft to rotate at a certain angle, so that the bump a and bump b in the conflicting state are disengaged, and the next bump The block a and the bump b are in interference fit, the sliding seat moves to collide with the next limit block, and the wire barrel moves to align with the next wire winding groove;

Step 4: Motor assembly; after steps 1 and 2 are repeated several times, the worker assembles the wound coil and the stator core to form a stator winding, and then installs the stator winding into the motor;

Step 5: Assemble the fire pump; after Step 3, the worker assembles the motor, the impeller and the pump casing to form the fire pump.

The beneficial effects of the present invention are:

(1) When the winding of each winding slot in the present invention is completed, the shaft can be rotated by a certain angle through the cooperation of the missing teeth and the gear, so that the wire barrel is aligned with the next winding slot and the winding is performed until all the windings are wound. The wire grooves are all wound with wire rods, and the coil is automatically wound with the counting device, which greatly improves the coil production efficiency;

(2) In the present invention, when each winding slot is used for wire winding, the winding die rotates and drives the traverse plate to perform reciprocating lateral movement, thereby causing the ejector rod to collide with the bump c, thereby causing the splint to move downward at a distance from the wire. The barrel forming extrusion part pulls the wire harness, making the coil formed by winding more compact, preventing the coil from loosening, improving the motor assembly efficiency, and improving the quality of the fire pump;

(3) In the present invention, the wire harness formed by the wire rod under the action of the wire roller will not be knotted, which improves the quality of the coil and further improves the quality of the fire pump.

To sum up, the invention has the advantages of simple structure, ingenious design, high winding efficiency and high quality of the produced fire pump, and is especially suitable for the production of the motor coil of the fire pump.

Description of drawings

Fig. 1 is the overall structure schematic diagram of the present invention;

Fig. 2 is an enlarged view at A in Fig. 1;

Fig. 3 is an enlarged view at B in Fig. 1;

Figure 4 is a winding state diagram;

Fig. 5 is an enlarged view at C in Fig. 4;

6 is a cross-sectional structural view of a fixed platform;

Fig. 7 is an enlarged view at D in Fig. 6;

8 is a schematic diagram of the structure of the rotating shaft;

9 is a schematic view of the side structure of the rotating shaft;

Figure 10 is a cross-sectional structural view of the splint assembly;

Fig. 11 is an enlarged view at E in Fig. 10;

Figure 12 is a schematic structural diagram of a power assembly;

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

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

In the description of the present invention, it should 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, etc. The positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, Therefore, it should not be construed as a limitation of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature defined as "first" or "second" may expressly or implicitly include one or more of that feature. In the description of the present invention, "plurality" means two or more, unless otherwise expressly and specifically defined.

实施例一：Example 1:

As shown in Figure 1, a fire pump assembly equipment, including a workbench 1, the workbench 1 is provided with a drive device 2 and a counting device 3 for controlling the start and stop of the drive device 2, including:

A winding die 4, the winding die 4 includes a mounting frame 41 fixedly connected to the driving device 2 and a core body 42 fixedly mounted on the mounting frame 41; the core body 42 is provided with several sets of windings wire slot 421;

The pay-off device 5, the pay-off device 5 comprises a pay-off bracket 51 arranged facing the winding die 4, a fixed table 52 arranged between the pay-off bracket 51 and the winding die 4, and a fixed table 52 arranged slidably on the The hub assembly 53 on the fixing table 52 and aligned with several groups of the wire winding grooves 421 in sequence, the limiting assembly 54 rotatably installed in the fixing table 52 and arranged against the hub assembly 53, and the transmission connecting the limiting component 54 and the control component 55 of the winding die 4; and

The pulling device 6 , the pulling device 6 includes a splint assembly 61 , which is slidably arranged on the hub assembly 53 , and a power assembly 62 that is dynamically connected with the control assembly 55 .

It should be noted that the fire pump 7 includes a motor 8 , a pump casing 9 and an impeller 11 . The motor 8 is provided with a stator winding 81 , and the stator winding 81 includes an iron core 811 and a coil wound on the iron core 811 812.

Further, as shown in FIG. 3 and FIG. 4 , several groups of the wire winding grooves 421 are coaxially arranged and are all set in a racetrack shape, and the inner diameters of the several groups of the wire winding grooves 421 move away from the The direction of workbench 1 increases sequentially.

Further, several sets of wire rollers 511 for guiding wires are rotatably installed on the wire pay-off bracket 51 , and several coils of wires are placed at the bottom of the wire pay-off frame 51 .

It should be noted that the wire for winding the coil 812 is an enameled wire.

It should be noted that the coiled wire is placed under the pay-off support 51, and the wire is passed around the wire roll 511 during use, and one wire roll 511 corresponds to one wire.

Further, the hub assembly 53 includes a sliding seat 531 slidably arranged on the fixing table 52 , a wire barrel 532 fixedly mounted on the sliding seat 531 and alignable with the wire winding groove 421 , a fixed A fixing plate 533 installed on one end of the fixing table 52 in the longitudinal direction and a spring a534 elastically connecting the sliding seat 531 and the fixing plate 533 .

It should be noted that, as shown in FIGS. 4 and 5 , several groups of wires pass through the wire barrel 532 to form a wire bundle.

Further, as shown in FIG. 6 to FIG. 9 , the limiting assembly 54 includes a plurality of sets of limiting blocks 541 arranged along the length of the fixing table 52 and slid up and down on the fixing table 52 . The bump a542 at the bottom of the limiting block 541, the rotating shaft 543 rotatably installed in the fixing table 52, and the spiral array cut the bump b544 on the rotating shaft 543 corresponding to the bump a542 one-to-one; The bump b544 and the bump a542 can be arranged in conflict with each other.

Further, as shown in FIG. 11 , the control assembly 55 includes a gear 551 coaxially fixed with the rotating shaft 543 , a missing tooth 552 rotatably mounted on one side of the gear 551 and engageable with the gear 551 , and The missing tooth 552 and the pulley assembly a553 of the mounting frame 41 are connected in a driving manner.

It should be noted that, after the winding die 4 rotates, one of the winding grooves 421 completes winding, and the missing tooth 552 is driven to rotate by the pulley assembly a553 at the same time, and then the tooth portion of the missing tooth 552 is rotated. The gear 551 and the rotating shaft 543 are driven to rotate 45°. Under the rotation of the rotating shaft 543, the bump a542 and the bump b544 that are in conflict with each other are disengaged, and the next bump a542 and The bump b544 interferes with and drives the limit block 541 corresponding to the bump a542 to move upward. Under the action of the spring a534 , the sliding seat 531 moves to the position protruding from the fixing table 52 . The limiting block 541 is in contact, and the wire barrel 532 is aligned with the next wire winding slot 421 , and then the mounting bracket 41 rotates to wind the next wire winding slot 421 .

Further, as shown in FIG. 2 , FIG. 10 and FIG. 11 , the splint assembly 61 includes a push rod 611 that is elastically slidably arranged on the side wall of the wire barrel 532 along the meridian direction, and is fixedly installed on the push rod 611 . And the splint 612 arranged inside the wire barrel 532, the traverse plate 613 arranged above the wire barrel 532 elastically sliding along the length of the fixing table 52, and the fixing block fixedly installed on one end of the traverse plate 613 614 and several groups of bumps c615 arrayed at the bottom of the traverse plate 613 along the length direction of the traverse plate 613 and can be arranged against the top rod 611 .

Further, as shown in FIG. 12 , the power assembly 62 includes a turntable 621 rotatably mounted on one side of the fixing table 52 , and a plurality of groups that are circumferentially arrayed on the turntable 621 and can be arranged against the fixing block 614 . The convex block d622 and the pulley assembly b623 that drively connect the turntable 621 and the control assembly 55 .

It should be noted that the pulley assembly b623 is powered with the pulley assembly a553.

It should be noted that, while the rotation of the mounting bracket 41 drives the winding slot 421 to perform winding, under the action of the pulley assembly a553 and the pulley assembly b623, the turntable 621 rotates, and then several groups of The protruding block d622 continuously collides with the fixing block 614, thereby driving the traverse plate 613 to reciprocate and traverse, and then the ejector rod 611 alternately collides with the protruding block c615, thereby realizing the up and down of the clamping plate 612. Moving, the splint 612 cooperates with the wire barrel 532 to pull the wire harness, so that the wire wrapped in the wire winding groove 421 is more compact.

It should be noted that one of the wire winding slots 421 corresponds to one of the bumps c615, which ensures that the wire harness will be pulled when each wire winding slot 421 is wound.

It is worth mentioning that the bottom of the splint 612 is made of a flexible material, which can ensure that the wire will not be scratched.

实施例二：Embodiment 2:

As shown in FIG. 13 , a fire pump assembly process according to Embodiment 2 of the present invention is described with reference to Embodiment 1, including the following steps:

Step 1: Paying off, a number of coils of wires are placed under the pay-off support 51, and then the wires in each enameled wire are respectively passed around a wire roller 511 and passed through the wire drum facing the winding groove 421 at the edge. 532 forms a wire harness, the end of the wire harness is fixed in the wire winding slot 421, and then the drive device 2 drives the mounting frame 41 to rotate several times, and the wire harness is wound in the wire winding slot 421;

Step 2: Stretch the wire, which is carried out at the same time as step 1. The rotation of the mounting frame 41 drives the turntable 621 to rotate, and several bumps d622 collide with the traverse plate 613 in sequence and drive the traverse plate 613 to reciprocate, and then the The ejector rod 611 is in continuous contact with the bump c615, so that the splint 612 moves downward at intervals and cooperates with the wire barrel 532 to pull the wire harness;

Step 3: Switch the winding slot. After step 1, the missing tooth 552 rotates and drives the gear 551 to rotate by a certain angle, which in turn drives the rotating shaft 543 to rotate by a certain angle, so that the bumps a542 and b544 in the conflicting state are disengaged, and the next The protruding block a542 and the protruding block b544 collide with each other, the sliding seat 531 moves to collide with the next limiting block 541 , and the wire barrel 532 moves to align with the next winding slot 421 ;

It should be noted that both steps 4 and 5 are performed manually.

工作过程：work process:

Several wires go around the wire roller 511 and are assembled into a wire bundle in the wire barrel 532, and then the wire bundle is fixed in the wire winding slot 421 at the most edge, and then the mounting frame 41 starts to wind the wire bundle around the wire. Inside the winding slot 421, the mounting bracket 41 drives the missing tooth 552 to rotate through the pulley assembly a553. After the mounting bracket 41 rotates several times, the tooth portion of the missing tooth 552 drives the The gear 551 rotates 45°, the bump a542 and the bump b544 that are in conflict with each other are disengaged, and at the same time, the next bump a542 and the bump b544 collide with each other, and drive the bump a542 corresponding to the The limit block 541 moves upward, and under the action of the spring a534, the sliding seat 531 moves to collide with the limit block 541 protruding from the fixing table 52, and then the wire barrel 532 and the next The winding slots 421 are aligned, the mounting frame 41 continues to rotate, and the next winding slot 421 is wound. Follow the above process until all the winding slots 421 are wound, and each winding slot 421 is wound. During the winding process of 421, under the action of the pulley assembly a553 and the pulley assembly b623, the turntable 621 rotates, and then several groups of the bumps d622 continuously collide with the fixed block 614, thereby driving the horizontal The moving plate 613 reciprocates and traverses, and then the ejector rods 611 alternately collide with the protrusions c615, thereby realizing the up and down movement of the clamping plate 612. The clamping plate 612 cooperates with the wire barrel 532 to pull the wire harness.

Claims

A fire pump assembly equipment, comprising a workbench (1), a drive device (2) and a counting device (3) for controlling the start and stop of the drive device (2) are arranged on the workbench (1), characterized in that, include:

A winding die (4), the winding die (4) comprising a mounting bracket (41) fixedly connected to the driving device (2) and a core (42) fixedly mounted on the mounting bracket (41) ; The core body (42) is provided with several groups of winding slots (421);

A pay-off device (5), the pay-off device (5) comprises a pay-off bracket (51) disposed opposite to the winding die (4), the pay-off bracket (51) and the winding die ( 4) Between the fixing table (52), the hub assembly (53) which is slidably arranged on the fixing table (52) and is aligned with several groups of the winding grooves (421) in sequence, and is rotatably installed on the fixing table (53). A limit assembly (54) provided in the table (52) and in conflict with the hub assembly (53), and a control assembly (55) drivingly connected to the limit assembly (54) and the winding die (4) ;as well as

A pulling device (6), the pulling device (6) includes a splint assembly (61) that is slidably arranged on the hub assembly (53) up and down, and a power assembly (62) that is dynamically connected to the control assembly (55).
The fire pump assembly equipment according to claim 1, characterized in that, several groups of the winding grooves (421) are coaxially arranged and are all set in a racetrack shape, and the inner diameters of the several groups of the winding grooves (421) are along the The axes of the mounting brackets (41) gradually increase in the direction away from the workbench (1).
The fire pump assembling equipment according to claim 1, characterized in that, several sets of wire rollers (511) for guiding wires are rotatably mounted on the wire pay-off bracket (51), and the wire pay-off bracket (51) ) at the bottom place several wires that make up the coil.
The fire pump assembly equipment according to claim 1, characterized in that, the hub assembly (53) comprises a sliding seat (531) slidably arranged on the fixing table (52), and is fixedly installed on the A wire barrel (532) on the sliding seat (531) and alignable with the wire winding groove (421), a fixing plate (533) fixed on one end of the fixing table (52) in the length direction, and elastically connecting the The sliding seat (531) and the spring a (534) of the fixing plate (533).
The fire pump assembling equipment according to claim 4, characterized in that the limiting component (54) comprises an array along the length direction of the fixing table (52) and is arranged on the fixing table (52) by sliding up and down A number of sets of limit blocks (541), corresponding to the protrusions a (542) fixedly installed at the bottom of the limit blocks (541), the rotating shaft (543) rotatably installed in the fixed table (52), and the spiral array Cut bumps b (544) corresponding to the bumps a (542) on the rotating shaft (543); the bumps b (544) and the bumps a (542) can be set against each other .
The fire pump assembly equipment according to claim 5, wherein the control assembly (55) comprises a gear (551) fixed coaxially with the rotating shaft (543), and is rotatably mounted on the gear (551). A missing tooth (552) on one side of the gear (551) which can be engaged with the gear (551) and a pulley assembly a (553) drivingly connecting the missing tooth (552) and the mounting frame (41).
The fire pump assembling equipment according to claim 4, characterized in that, the splint assembly (61) comprises a top rod (611) elastically slidably arranged on the side wall of the wire barrel (532) along the meridian direction , a splint (612) fixedly installed on the ejector rod (611) and arranged inside the wire barrel (532), elastically slidingly arranged above the wire barrel (532) along the length direction of the fixing table (52) A traverse plate (613), a fixing block (614) fixedly installed at one end of the traverse plate (613), and arrayed at the bottom of the traverse plate (613) along the length direction of the traverse plate (613) and Several groups of projections c ( 615 ) are provided against the top rod ( 611 ).
The fire pump assembling equipment according to claim 7, characterized in that, the power assembly (62) comprises a turntable (621) rotatably installed on one side of the fixing table (52), and a circular array on the turntable Several groups of projections d (622) on (621) that can be arranged against the fixing block (614) and a pulley assembly b (623) drivingly connecting the turntable (621) and the control assembly (55).
A fire pump assembly process is characterized in that, comprises the following steps:

Step 1: Pay off, place several coiled wires under the pay-off support (51), then pass the wires in each roll of enameled wire around a wire roller (511) and pass through the wire winding grooves located at the edge The wire barrel (532) of (421) forms a wire harness, and the end of the wire harness is fixed in the wire winding groove (421), and then the driving device (2) drives the mounting frame (41) to rotate several times, and the wire harness is wound around the wire winding. in the groove (421);

Step 2: Stretch the wire, which is carried out at the same time as Step 1. The rotation of the mounting frame (41) drives the turntable (621) to rotate, and several bumps d (622) collide with the traverse plate (613) in turn and drive the traverse plate (613). The plate (613) moves back and forth, and then the ejector rod (611) continuously collides with the bump c (615), so that the splint (612) moves down at intervals and cooperates with the wire barrel (532) to pull the wire harness;

Step 3: Switch the winding slot. After step 1, the missing tooth (552) rotates and drives the gear (551) to rotate by a certain angle, which in turn drives the rotating shaft (543) to rotate by a certain angle, so that the bump a (542) in a conflicting state and the bump b (544) is disengaged, the next bump a (542) and the bump b (544) collide with each other, and the sliding seat (531) moves to conflict with the next limit block (541), The wire barrel (532) is moved to be aligned with the next wire winding slot (421);

Step 4: Motor assembly; after steps 1 and 2 are repeated several times, the worker assembles the wound coil and the stator core to form a stator winding, and then installs the stator winding into the motor;

Step 5: Assemble the fire pump; after Step 3, the worker assembles the motor, the impeller and the pump casing to form the fire pump.