Automatic production line for assembling pump covers of multistage centrifugal pumps

Abstract

The invention belongs to the technical field of multi-stage centrifugal pump production, and particularly relates to an automatic production line for assembling a pump cover of a multi-stage centrifugal pump, which mainly comprises a lifting type turnover assembly, a first extrusion assembly, a second extrusion assembly, a strake pushing manipulator and an inner supporting piece feeding assembly, for a reinforced pump cover composed of a pump cover piece, an inner supporting piece and an outer hoop piece, a pump cover blank is adsorbed through a lifting type overturning assembly and is driven to overturn around the axis of the pump cover blank, and a first extrusion assembly and a second extrusion assembly are jointly used for sequentially extruding, forming and machining the pump cover blank into a pump cover semi-finished product and the pump cover piece; the second extrusion assembly is matched with the strake pushing mechanical arm to additionally install multiple circles of outer strake pieces on the outer side of the pump cover piece, the inner supporting piece feeding assembly is used for additionally installing an inner supporting piece on the inner side of the pump cover piece which moves to the second station, in this way, automatic assembling of the reinforced pump cover can be achieved, the reinforced pump cover keeps the advantage of light weight, and meanwhile the assembling efficiency is improved. The compressive strength and the overall rigidity are qualitatively improved.

Description

Technical Field

[0001] The invention belongs to the technical field of multi-stage centrifugal pump production, and in particular relates to an automated production line for assembling pump covers of multi-stage centrifugal pumps. Background Art

[0002] The multi-stage centrifugal pump is a centrifugal pump with a compact overall structure, small size, light weight, low noise, significant energy-saving effect and easy maintenance. It adopts a standard motor and quick-install mechanical seal, which is very convenient to replace. The flow-through parts of the pump are made of stainless steel and can be used for mildly corrosive media. When the motor drives the impeller on the shaft to rotate at high speed, the liquid filled in the impeller is thrown from the center of the impeller along the flow channel between the blades to the surrounding areas of the impeller under the action of centrifugal force. Due to the action of the blades, the pressure and speed of the liquid increase at the same time, and it is led to the next impeller through the flow channel of the guide casing. In this way, it flows through all the impellers and guide casings one by one, further increasing the pressure energy of the liquid.

[0003] Traditional multi-stage centrifugal pumps feature a thin-walled pump cover. This structure offers significant advantages: it effectively reduces metal consumption, thereby lowering manufacturing costs and equipment weight; and its lightweight design facilitates logistics, transportation, and on-site assembly. However, this structure exhibits significant drawbacks in high-pressure operating environments: thin-walled structures are prone to plastic deformation and even stress cracking, leading to a series of problems such as cover damage and increased vibration, seriously impacting the pump's reliability and service life. Therefore, it is necessary to optimize the pump cover to achieve a qualitative improvement in compressive strength and overall rigidity while maintaining its lightweight advantages.

[0004] Traditional automated production lines for assembling multi-stage centrifugal pump covers have shortcomings. First, they cannot meet the automated assembly requirements for reinforced pump covers. Second, they cannot achieve reliable connection with the inner and outer reinforcing supports during the molding process of the pump cover blank and its reinforcement ring. This requires additional and cumbersome steps to complete assembly, increasing manufacturing costs. Therefore, it is necessary to optimize and improve the traditional automated production line for assembling multi-stage centrifugal pump covers. Summary of the Invention

[0005] The object of the present invention is to overcome at least one of the above-mentioned problems existing in the prior art and to provide an automated production line for assembling pump covers of multi-stage centrifugal pumps.

[0006] In order to achieve the above technical objectives and the above technical effects, the present invention is implemented through the following technical solutions: An automated production line for assembling a multi-stage centrifugal pump cover, comprising a lifting and flipping assembly, a first extrusion assembly, a second extrusion assembly, a hoop bar pushing manipulator, and an inner support member feeding assembly. The reinforced pump cover to be assembled consists of a pump cover member, an inner support member, and an outer hoop member. The lifting and flipping assembly is used to absorb the pump cover blank and drive it to flip around its own axis; the lifting and flipping assembly can drive the extruded pump cover to move downward from the first station to the second station; The first extrusion assembly is arranged on the left side of the first workstation, and the second extrusion assembly is arranged on the right side of the first workstation; the first extrusion assembly and the second extrusion assembly are used together to extrude and form the pump cover blank into a pump cover semi-finished product and a pump cover member in sequence, and the second extrusion assembly cooperates with the hoop bar pushing robot to install multiple circles of outer hoops on the outside of the pump cover member; The inner support member loading assembly is arranged at the left side of the second workstation and is used to install the inner support member on the inner side of the pump cover member that has been displaced to the second workstation.

[0007] Furthermore, in the above-mentioned automated production line for assembling the pump cover of the multi-stage centrifugal pump, the pump cover blank includes a conical cylinder, the narrow end of the conical cylinder is provided with a circular end plate, a plurality of water inlet grooves are provided on the circular end plate, the wide end of the conical cylinder is provided with an annular end plate, the outer side of the annular end plate is provided with a plurality of grooves circumferentially inwardly, and the annular end plate is provided with an external mounting hole through the groove; the pump cover semi-finished product is formed with a plurality of circles of outwardly protruding pressure-resistant convex tubes on the conical cylinder of the pump cover blank; the pump cover member is formed with inwardly recessed limit grooves on both sides of the pressure-resistant convex tube of the pump cover semi-finished product for facilitating clamping of the outer hoop.

[0008] Furthermore, in the above-mentioned automated production line for assembling the pump cover of the multi-stage centrifugal pump, the inner support member is composed of an inner support plate, a tensile strip plate and a clamping plate. The specifications of the inner support plate match the specifications of the circular end plate. A plurality of filter holes are provided on the inner support plate. A plurality of tensile strip plates are installed circumferentially on the outer edge of the inner support plate. A plurality of protrusions that can be inserted into the pressure-resistant convex tubes are provided on the outer side of the tensile strip plate. A clamping plate that matches the clamping groove is provided on the outer end of the tensile strip plate. An inner mounting hole that matches the position of the outer mounting hole is provided on the clamping plate.

[0009] Furthermore, in the above-mentioned automated production line for assembling the pump cover of the multi-stage centrifugal pump, the outer hoop is formed by bending a hoop strip with a T-shaped cross section, and a plurality of hollow holes are opened at equal intervals on the hoop strip.

[0010] Furthermore, in the above-mentioned automated production line for assembling the pump cover of the multi-stage centrifugal pump, the lifting and flipping assembly includes a first base plate, a vertical lifting push rod, an annular mounting plate, a first rotary drive, an annular suction cup and a first positioning rod. The cylinder body of the vertical lifting push rod is installed on the first base plate, and the movable end of the vertical lifting push rod is installed with the first rotary drive via the annular mounting plate. The movable end of the first rotary drive is installed with an annular suction cup, and a plurality of first positioning rods are installed circumferentially on the outer side of the annular suction cup. The specifications of the first positioning rods match the specifications of the mounting inner hole.

[0011] Furthermore, in the above-mentioned automated production line for assembling the pump cover of the multi-stage centrifugal pump, the first extrusion assembly includes a second base plate, a first horizontal push rod, a first scissors-type telescopic frame, a first grooved plate, a first screw motor, a first screw, a first movable support plate, an internal extrusion mechanism and an internal pressure-bearing mechanism, the first horizontal push rod and the first scissors-type telescopic frame are installed between the second base plate and the first grooved plate, the first screw motor is installed on the outer side of the first grooved plate, the output end of the first screw motor is connected to the first screw, the first screw is provided with two screw segments with opposite rotation directions, the outer side of each screw segment is sleeved with a first movable support plate, and the outer ends of the two first movable support plates are respectively installed with an internal extrusion mechanism and an internal pressure-bearing mechanism; The inner extrusion mechanism includes a first groove-shaped mounting frame, a first extrusion push rod, a first coupling, a first slide rod, a first mounting plate, an extrusion block and a first sliding sleeve, wherein the first extrusion push rod is mounted on one side plate of the first groove-shaped mounting frame, the movable end of the first extrusion push rod is connected to one end of the first slide rod via the first coupling, the other end of the first slide rod is mounted on the extrusion block via the first mounting plate, and the first sliding sleeve which is sleeved on the outside of the first slide rod is embedded in the other side plate of the first groove-shaped mounting frame; The internal pressure-bearing mechanism includes a second groove-type mounting frame, a first pressure-bearing push rod, a first rotary joint, a second slide rod, a second mounting plate, a pressure block, a first flip motor and a first belt transmission member. A side plate of the second groove-type mounting frame is installed with the first pressure-bearing push rod, the movable end of the first pressure-bearing push rod is connected to one end of the second slide rod via the first rotary joint, the other end of the second slide rod is installed with a pressure block via the second mounting plate, the first flip motor is installed on the second groove-type mounting frame, and the output shaft of the first flip motor is transmission-connected to the second slide rod through the first belt transmission member.

[0012] Furthermore, in the above-mentioned automated production line for assembling the pump cover of the multi-stage centrifugal pump, the second extrusion assembly includes a third base plate, a second horizontal push rod, a second scissors-type telescopic frame, a second grooved plate, a second screw motor, a second screw, a second movable support plate, an external pressure-bearing mechanism and an external extrusion mechanism. A second horizontal push rod and a second scissors-type telescopic frame are installed between the third base plate and the second grooved plate, a second screw motor is installed on the outer side of the second grooved plate, an output end of the second screw motor is connected to a second screw, the second screw is provided with two screw segments with opposite rotation directions, a second movable support plate is sleeved on the outer side of each screw segment, and the outer ends of the two second movable support plates are respectively installed with an external pressure-bearing mechanism and an external extrusion mechanism; The outer pressure-bearing mechanism includes a third groove-shaped mounting frame, a second pressure-bearing push rod, a second swivel joint, a third slide bar, a third mounting plate, a pressure sleeve, a bending pressure roller, a second flip motor and a second belt transmission member, one side plate of the third groove-shaped mounting frame is installed with a second pressure-bearing push rod, a movable end of the second pressure-bearing push rod is connected to one end of the third slide bar via the second swivel joint, the other end of the third slide bar is installed with a pressure sleeve and a bending pressure roller via the third mounting plate, the second flip motor is installed on the third groove-shaped mounting frame, and the output shaft of the second flip motor is transmission-connected to the third slide bar via the second belt transmission member; The external extrusion mechanism includes a fourth groove-type mounting frame, a second extrusion push rod, a second coupling, a fourth slide bar, a second sleeve, a fourth mounting plate, a mechanical clamp and an extrusion wheel. One side plate of the fourth groove-type mounting frame is equipped with a second extrusion push rod, and the movable end of the second extrusion push rod is connected to one end of the fourth slide bar via the second coupling. The other end of the fourth slide bar is equipped with a mechanical clamp via the fourth mounting plate. The other side plate of the fourth groove-type mounting frame is embedded with a second sleeve sleeved on the outside of the fourth slide bar, and the mechanical clamp is located on two relatively displaced clamps and an extrusion wheel is installed.

[0013] Furthermore, in the above-mentioned automated production line for assembling the pump cover of the multi-stage centrifugal pump, the internal support loading assembly includes a fourth base plate, a third horizontal push rod, a third scissors-type telescopic frame and a clamping mechanism, and a third horizontal push rod and a third scissors-type telescopic frame are installed between the fourth base plate and the clamping mechanism; the clamping mechanism includes a circular box, a second rotary drive, a turntable and a clamping member, the interior of the circular box is equipped with a second rotary drive, and the movable end of the second rotary drive is equipped with a turntable, and the clamping member is composed of a clamping head and a second positioning rod fixed thereto, the outer plate of the circular box is circumferentially provided with a plurality of radial sliding grooves for facilitating radial displacement of the tensile strips and the clamping plates in the internal support, the specifications of the second positioning rod are matched with the specifications of the mounting inner hole, and the outer side of the turntable is circumferentially provided with a plurality of arc sliding grooves that match the clamping head in the clamping member.

[0014] Furthermore, the above-mentioned automated production line for assembling the pump cover of the multi-stage centrifugal pump also includes a controller, which is respectively connected to the lifting and flipping assembly, the first extrusion assembly, the second extrusion assembly, the hoop pushing robot and the internal support feeding assembly.

[0015] The present invention also provides an automated production line for assembling a multi-stage centrifugal pump cover, wherein the production and assembly method thereof comprises the following steps: S1. Using the lifting and flipping assembly to absorb the pump cover blank and place the pump cover blank in the first working position; using the extrusion block in the first extrusion assembly and the pressure-bearing sleeve in the second extrusion assembly to approach each other, the lifting and flipping assembly is used to drive the pump cover blank to rotate circumferentially, and gradually extrude and form a plurality of circles of outwardly protruding pressure-resistant convex tubes on the conical cylinder of the pump cover blank to obtain a semi-finished pump cover; using the pressure-bearing block in the first extrusion assembly and the extrusion wheels in the second extrusion assembly to approach each other, the lifting and flipping assembly is used to drive the pump cover semi-finished product to rotate circumferentially, and extrude and form limiting grooves on both sides of the pressure-resistant convex tube of the pump cover semi-finished product to obtain a pump cover piece; S2, using the hoop bar pushing manipulator to push the hoop bar between the two opposite limit grooves, using the bending pressure wheel in the second extrusion assembly to bend the hoop bar, and cooperating with the lifting and turning assembly to drive the pump cover semi-finished product to rotate circumferentially, so as to realize the installation of multiple turns of outer hoop parts on the outer side of the pump cover; S3. Use the lifting flip assembly to drive the pump cover to move downward from the first station to the second station, and use the inner support loading assembly to install the inner support on the inner side of the pump cover.

[0016] The beneficial effects of the present invention are: 1. The present invention provides an automated production line for assembling a multi-stage centrifugal pump cover, which is mainly composed of a lifting and flipping assembly, a first extrusion assembly, a second extrusion assembly, a hoop pushing robot and an inner support member loading assembly. For a reinforced pump cover composed of a pump cover member, an inner support member and an outer hoop member, the lifting and flipping assembly is used to absorb the pump cover blank and drive it to flip around its own axis, which is beneficial for the first extrusion assembly and the second extrusion assembly to be used together to extrude and shape the pump cover blank into a pump cover semi-finished product and a pump cover member in sequence. The second extrusion assembly cooperates with the hoop pushing robot to install multiple circles of outer hoop members on the outside of the pump cover member, and uses the inner support member loading assembly to install inner supports on the inside of the pump cover member that has been displaced to the second workstation. In this way, the automated assembly of the reinforced pump cover can be achieved.

[0017] 2. The reinforced pump cover prepared by the present invention is composed of a pump cover part, an inner support part and an outer hoop part. The pump cover part uses the inner support part to improve its overall axial tensile strength, and at the same time the inner support part can provide filtering and impurity blocking for the water inlet; the pump cover part uses the outer hoop part to improve its overall radial compressive strength. In this way, the pump cover can maintain its lightweight advantage while achieving a qualitative improvement in compressive strength and overall rigidity.

[0018] Of course, any product implementing the present invention does not necessarily need to achieve all of the above advantages at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 It is a schematic structural diagram of the present invention as a whole; Figure 2 It is a structural schematic diagram of the reinforced pump cover of the present invention; Figure 3 A half-section schematic diagram of the reinforced pump cover of the present invention; Figure 4 This is a schematic diagram of the structural decomposition of the reinforced pump cover of the present invention; Figure 5 Schematic diagram of the processing flow of the pump cover in the present invention; Figure 6 A half-section schematic diagram of a pump cover in the present invention; Figure 7 Schematic diagram of the structure of the inner support member in the present invention; Figure 8 Schematic diagram of the structure of the outer hoop in the present invention; Figure 9 It is a structural schematic diagram of the lifting and flipping assembly in the present invention; Figure 10 Schematic diagram of the structure of the first extrusion assembly in the present invention; Figure 11 It is a structural schematic diagram of the internal extrusion mechanism in the present invention; Figure 12 It is a structural schematic diagram of the internal pressure-bearing mechanism in the present invention; Figure 13 Schematic diagram of the structure of the second extrusion assembly in the present invention; Figure 14 It is a structural diagram of the external pressure-bearing mechanism of the present invention; Figure 15 It is a structural diagram of the external and internal extrusion mechanism of the present invention; Figure 16 This is a schematic structural diagram of the inner support member loading assembly of the present invention; Figure 17 Schematic diagram of the structure of the clamping mechanism of the present invention; Figure 18 Schematic diagram of the structure of the radial chute in the present invention; Figure 19 Schematic diagram of the structure of the arc chute in the present invention; Figure 20 Schematic diagram of the structure of the clamping member in the present invention; In the accompanying drawings, the components represented by the reference numerals are as follows: 1-lifting flip assembly, 11-first base plate, 12-vertical lifting push rod, 13-annular mounting plate, 14-first rotary drive, 15-annular suction cup, 16-first positioning rod; 2-first extrusion assembly, 21-second base plate, 22-first horizontal push rod, 23-first scissor fork telescopic frame, 24-first groove plate, 25-first screw motor, 26-first screw, 27-first movable support plate, 28-inner extrusion mechanism, 281-first groove mounting frame, 282-first extrusion push rod, 283-first coupling, 284-first slide rod, 285-first mounting plate, 286-extrusion block, 287-first sliding sleeve, 29-inner pressure-bearing mechanism, 291-second groove mounting frame, 292-first pressure-bearing push rod, 293-first rotary joint, 294-second slide rod, 295-second mounting plate, 296-pressure block, 296a-T-shaped head, 296b-inner pressure-bearing area, 297-first flip motor, 298-first belt transmission member; 3-second extrusion assembly, 31-third base plate, 32-second horizontal push rod, 33-second scissor telescopic frame, 34-second groove plate, 35-second screw motor, 36-second screw, 37-second movable support plate, 38-external pressure mechanism, 381-third groove mounting frame, 382-second pressure push rod, 383-second rotary joint, 384-third slide rod, 385-third mounting plate, 386-second flip motor, 387-second belt transmission member, 388-pressure sleeve, 389-bending pressure wheel, 39-external extrusion mechanism, 391-fourth groove mounting frame, 392-second extrusion push rod, 393-second coupling, 394-fourth slide rod, 395-second sliding sleeve, 396-fourth mounting plate, 397-mechanical clamp, 398-extrusion wheel; 4 - internal support loading assembly, 41 - fourth base plate, 42 - third horizontal push rod, 43 - third scissor telescopic frame, 44 - clamping mechanism, 441 - circular box, 442 - second rotary drive, 443 - turntable, 444 - clamping member, 444a - clamping head, 444b - second positioning rod, 445 - radial slide, 446 - arcuate slide; 5-pump cover, 5a-pump cover blank, 5b-pump cover semi-finished product, 51-conical cylinder, 52-circular end plate, 53-water inlet groove, 54-annular end plate, 55-slot, 56-installation outer hole, 57-pressure convex tube, 58-limiting groove; 6- inner support, 61- inner support plate, 62- tensile strip plate, 63- clamping plate, 64- filter hole, 65- protrusion, 66- mounting inner hole; 7-outer hoop, 71-hoop strip, 72-hollow hole. DETAILED DESCRIPTION

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0022] like Figures 1-4 As shown, this embodiment provides an automated production line for assembling a multi-stage centrifugal pump cover, which includes a lifting and flipping assembly 1, a first extrusion assembly 2, a second extrusion assembly 3, a hoop pushing robot and an inner support member loading assembly 4. The reinforced pump cover to be assembled is composed of a pump cover member 5, an inner support member 6 and an outer hoop member 7. The lifting and flipping assembly 1 is used to adsorb the pump cover blank 5a and drive it to flip around its own axis. The lifting and flipping assembly 1 can drive the extruded pump cover member 5 to move downward from the first station to the second station. The first extrusion assembly 2 is arranged on the left side of the first station, and the second extrusion assembly 3 is arranged on the right side of the first station. The first extrusion assembly 2 and the second extrusion assembly 3 are used together to extrude and mold the pump cover blank 5a into a pump cover semi-finished product 5b and a pump cover member 5 in sequence. The second extrusion assembly 3 cooperates with the hoop pushing robot to add multiple turns of outer hoop members 7 on the outside of the pump cover member 5. The inner support member loading assembly 4 is arranged at the left side of the second station, and is used to install the inner support member 6 on the inner side of the pump cover member 5 that has been displaced to the second station.

[0023] like Figure 5-Figure 6 As shown, the pump cover blank 5a includes a conical cylinder 51. The narrow end of the conical cylinder 51 is provided with a circular end plate 52. The circular end plate 52 is circumferentially provided with a number of fan-shaped water inlet grooves 53. The wide end of the conical cylinder 51 is provided with an annular end plate 54. The outer side of the annular end plate 54 is provided with a number of retaining grooves 55 circumferentially inwardly. The annular end plate 54 is provided with mounting holes 56 located at the retaining grooves. The pump cover semi-finished product 5b has a number of outwardly protruding pressure-resistant convex tubes 57 formed on the conical cylinder 51 of the pump cover blank 5a. The pump cover component 5 has inwardly recessed limiting grooves 58 on both sides of the pressure-resistant convex tubes 57 of the pump cover semi-finished product 5b to facilitate clamping of the outer hoop 7.

[0024] like Figure 7 As shown, the inner support member 6 consists of an inner support plate 61, a tensile strip plate 62, and a clamping plate 63. The specifications of the inner support plate 61 match those of the circular end plate 52. The inner support plate 61 is provided with a plurality of filter holes 64. Several tensile strip plates 62 are circumferentially mounted on the outer edge of the inner support plate 61. The outer sides of the tensile strip plates 62 are provided with a plurality of hemispherical protrusions 65 that can be snapped into the inner cavity of the pressure-resistant convex tube 57. The outer ends of the tensile strip plates 62 are provided with a clamping plate 63 that engages with the clamping groove 55. The clamping plate 63 also has an inner mounting hole 66 that aligns with the outer mounting hole 56.

[0025] like Figure 8 As shown, the outer hoop 7 is formed by bending a hoop strip 71 having a T-shaped cross section, and a plurality of hollow holes 72 are equidistantly provided on the hoop strip 71. The design of the hollow holes 72 can reduce the overall mass of the outer hoop 7 and reduce the difficulty of bending.

[0026] like Figure 9 As shown, the lifting and flipping assembly 1 includes a first base plate 11, a vertical lifting push rod 12, an annular mounting plate 13, a first rotary driver 14, an annular suction cup 15, and a first positioning rod 16. The cylinder of the vertical lifting push rod 12 is mounted on the first base plate 11. The movable end of the vertical lifting push rod 12 is mounted with the first rotary driver 14 via the annular mounting plate 13. The movable end of the first rotary driver 14 is mounted with the annular suction cup 15. Several first positioning rods 16 are mounted circumferentially on the outer side of the annular suction cup 15. The specifications of the first positioning rods 16 match those of the mounting inner hole 66. The outer side of the annular suction cup 15 is provided with several adsorption holes for adsorbing the annular end plate 54 in the pump cover blank 5a.

[0027] The working principle of the lifting and flipping assembly 1 is: using the annular suction cup 15 to adsorb and lock the pump cover blank 5a, using the first rotary drive 14 to drive the adsorbed and locked pump cover blank 5a to rotate along a fixed angle in the circumferential direction, using the first positioning rod 16 to ensure the torsional force of the rotation, and using the vertical lifting push rod 12 to drive the adsorbed and locked pump cover blank 5a to vertically displace.

[0028] like Figure 10 As shown, the first extrusion assembly 2 includes a second base plate 21, a first horizontal push rod 22, a first scissor-type telescopic frame 23, a first grooved plate 24, a first screw motor 25, a first screw 26, a first movable support plate 27, an internal extrusion mechanism 28, and an internal pressure-bearing mechanism 29. The first horizontal push rod 22 and the first scissor-type telescopic frame 23 are installed between the second base plate 21 and the first grooved plate 24. The first screw motor 25 is installed on the outside of the first grooved plate 24. The output end of the first screw motor 25 is connected to the first screw 26. The first screw 26 is provided with two screw segments with opposite rotation directions. The outside of each screw segment is sleeved with a first movable support plate 27. The outer ends of the two first movable support plates 27 are respectively mounted with the internal extrusion mechanism 28 and the internal pressure-bearing mechanism 29.

[0029] The working principle of the first extrusion assembly 2 is as follows: the first horizontal push rod 22 is used to drive the internal extrusion mechanism 28 and the internal pressure-bearing mechanism 29 to perform horizontal displacement, the first scissors-type telescopic frame 23 is used to ensure the stability of the horizontal displacement, and the first groove plate 24, the first screw motor 25, the first screw 26, and the first movable support plate 27 constitute a first screw drive system, which is used to drive the internal extrusion mechanism 28 and the internal pressure-bearing mechanism 29 to move closer to or away from each other.

[0030] like Figure 11 As shown, the internal extrusion mechanism 28 includes a first slotted mounting frame 281, a first extrusion push rod 282, a first coupling 283, a first slide bar 284, a first mounting plate 285, an extrusion block 286, and a first sliding sleeve 287. The first extrusion push rod 282 is mounted on one side plate of the first slotted mounting frame 281. The movable end of the first extrusion push rod 282 is connected to one end of the first slide bar 284 via a first coupling. The other end of the first slide bar 284 is mounted on the extrusion block 286 via the first mounting plate 285. The other side plate of the first slotted mounting frame 281 is embedded with a first sliding sleeve 287 that sleeves around the outside of the first slide bar 284. The shape of the extrusion block 286 matches the inner wall shape of the pressure-resistant convex tube 57.

[0031] The working principle of the internal extrusion mechanism 28 is as follows: the first extrusion push rod 282 drives the extrusion block 286 to perform axial displacement through the first coupling 283, the first slide rod 284, and the first mounting plate 285, and the first sliding sleeve 287 provides guidance for the displacement of the first slide rod 284.

[0032] like Figure 12 As shown, the internal pressure-bearing mechanism 29 includes a second slot-type mounting frame 291, a first pressure-bearing push rod 292, a first rotary joint 293, a second slide bar 294, a second mounting plate 295, a pressure block 296, a first flip motor 297 and a first belt transmission member 298. A first pressure-bearing push rod 292 is mounted on one side plate of the second slot-type mounting frame 291. The movable end of the first pressure-bearing push rod 292 is connected to one end of the second slide bar 294 via the first rotary joint 293. The other end of the second slide bar 294 is mounted with a pressure block 296 via the second mounting plate 295. A first flip motor 297 is mounted on the second slot-type mounting frame 291. The output shaft of the first flip motor 297 is connected to the second slide bar 294 through the first belt transmission member 298. The upper part of the pressure block 296 is provided with a T-shaped head 296a. When the T-shaped head 296a rotates to the position shown in FIG. Figure 12 When in the position shown, inner pressure-bearing areas 296b are formed on both sides thereof to provide external support for the extrusion molding of the limiting groove 58. When the T-shaped head 296a is further rotated 90 degrees, the axial projection of the T-shaped head 296a along the pressure-bearing block 296 can be covered by the axial projection of the narrow portion of the T-shaped head 296a itself. That is, the T-shaped head 296a can be separated from the pressure-resistant protruding tube 57 that molds the limiting groove 58 by rotating 90 degrees.

[0033] The working principle of the internal pressure-bearing mechanism 29 is as follows: the first pressure-bearing push rod 292 is used to drive the pressure block 296 to perform axial displacement, and the first flipping system composed of the second slide rod 294, the first flipping motor 297 and the first belt transmission member 298 is used to drive the pressure block 296 to flip 90 degrees, so as to facilitate the subsequent disengagement operation of the pressure block 296 from the pressure-resistant convex tube 57.

[0034] like Figure 13 As shown, the second extrusion assembly 3 includes a third base plate 31, a second horizontal push rod 32, a second scissor-type telescopic frame 33, a second grooved plate 34, a second screw motor 35, a second screw 36, a second movable support plate 37, an external pressure-bearing mechanism 38, and an external extrusion mechanism 39. The second horizontal push rod 32 and the second scissor-type telescopic frame 33 are installed between the third base plate 31 and the second grooved plate 34. The second screw motor 35 is installed on the outside of the second grooved plate 34. The output end of the second screw motor 35 is connected to the second screw 36. The second screw 36 has two screw segments with opposite rotation directions. The outside of each screw segment is sleeved with a second movable support plate 37. The outer ends of the two second movable support plates 37 are respectively mounted with the external pressure-bearing mechanism 38 and the external extrusion mechanism 39.

[0035] The working principle of the second extrusion assembly 3 is as follows: the second horizontal push rod 32 is used to drive the external pressure-bearing mechanism 38 and the external extrusion mechanism 39 to perform horizontal displacement, the second scissors telescopic frame 33 is used to ensure the stability of the horizontal displacement, and the second grooved plate 34, the second screw motor 35, the second screw 36, and the second movable support plate 37 constitute a second screw drive system, which is used to drive the external pressure-bearing mechanism 38 and the external extrusion mechanism 39 to move closer to or away from each other.

[0036] like Figure 14 As shown, the external pressure-bearing mechanism 38 includes a third trough-shaped mounting frame 381, a second pressure-bearing push rod 382, ​​a second swivel joint 383, a third slide bar 384, a third mounting plate 385, a pressure sleeve 388, a bending pressure roller 389, a second flip motor 386, and a second belt transmission 387. The second pressure-bearing push rod 382 is mounted on one side plate of the third trough-shaped mounting frame 381. The movable end of the second pressure-bearing push rod 382 is connected to one end of the third slide bar 384 via the second swivel joint 383. The other end of the third slide bar 384 is mounted to the pressure sleeve 388 and the bending pressure roller 389 via the third mounting plate 385. The second flip motor 386 is mounted on the third trough-shaped mounting frame 381. The output shaft of the second flip motor 386 is in driving connection with the third slide bar 384 via the second belt transmission 387.

[0037] The working principle of the external pressure-bearing mechanism 38 is as follows: the second pressure-bearing push rod 382 is used to drive the pressure sleeve 388 or the bending pressure wheel 389 to perform axial displacement, and the second flipping system composed of the third slide rod 384, the second flipping motor 386 and the second belt transmission member 387 is used to drive the third mounting plate 385 to flip 180 degrees, so as to facilitate the interchange of the positions of the pressure sleeve 388 and the bending pressure wheel 389.

[0038] like Figure 15As shown, the external extrusion mechanism 39 includes a fourth slotted mounting frame 391, a second extrusion push rod 392, a second coupling 393, a fourth slide bar 394, a second sleeve 395, a fourth mounting plate 396, a mechanical gripper 397, and an extrusion wheel 398. The second extrusion push rod 392 is mounted on one side plate of the fourth slotted mounting frame 391. The movable end of the second extrusion push rod 392 is connected to one end of the fourth slide bar 394 via the second coupling. The other end of the fourth slide bar 394 is mounted to the mechanical gripper 397 via the fourth mounting plate 396. The second sleeve 395, which fits around the outer side of the fourth slide bar 394, is embedded in the other side plate of the fourth slotted mounting frame 391. The mechanical gripper 397, positioned between two relatively displaced jaws, is mounted with an extrusion wheel 398. The roller thickness of the extrusion wheel 398 matches the internal dimensions of the retaining groove 58.

[0039] The working principle of the external extrusion mechanism 39 is as follows: the second extrusion push rod 392 drives the mechanical clamp 397 to perform axial displacement through the second coupling 393, the fourth slide rod 394, and the fourth mounting plate 396, the second sliding sleeve 395 is used to provide guidance for the displacement of the fourth slide rod 394, and the mechanical clamp 397 is used to drive the two extrusion wheels 398 to move closer to or away from each other.

[0040] like Figures 16-20 As shown, the internal support member loading assembly 4 includes a fourth base plate 41, a third horizontal push rod 42, a third scissor-type telescopic frame 43, and a clamping mechanism 44. The third horizontal push rod 42 and the third scissor-type telescopic frame 43 are mounted between the fourth base plate 41 and the clamping mechanism 44. The clamping mechanism 44 includes a circular box 441, a second rotary driver 442, a turntable 443, and a clamping member 444. The second rotary driver 442 is mounted within the circular box 441, and the turntable 443 is mounted on the movable end of the second rotary driver 442. The clamping member 444 is composed of a clamping head 444a and a second positioning rod 444b fixed thereto. The outer plate of the circular box 441 is circumferentially provided with a plurality of radial sliding grooves 445 for facilitating the radial displacement of the tensile strips 62 and the clamping plates 63 in the inner support member 6. The specifications of the second positioning rod 444b are matched with the specifications of the mounting inner hole 66. The outer side of the turntable 443 is circumferentially provided with a plurality of arc-shaped sliding grooves 446 that cooperate with the clamping head 444a in the clamping member 444.

[0041] The working principle of the inner support member loading assembly 4 is as follows: the third horizontal push rod 42 is used to drive the clamping mechanism 44 to move horizontally, and the third scissor-type telescopic frame 43 is used to ensure the stability of the horizontal displacement. The clamping mechanism 44 uses the second rotary driver 442 to drive the turntable 443 to rotate, and the turntable 443 drives the clamping member 444 to move radially along the radial slot 445, so that the inner support member 6 inserted on the clamping member 444 and the card plate 63 on it are close to each other; when the third horizontal push rod 42 pushes the inner support plate 61 of the inner support member 6 against the inner support plate 61 of the inner support member 6 When on the inner side of the circular end plate 52 of the pump cover 5, the clamping mechanism 44 uses the second rotary driver 442 to drive the turntable 443 to rotate in the opposite direction, so that the clamping plates 63 on the inner support part 6 move away from each other, and the protrusions 65 of the clamping plates 63 are then stuck in the inner cavity of the corresponding pressure-resistant convex tube 57; then the unloading robot is used to separate the pump cover 5 from the lifting and flipping assembly 1 in the horizontal direction, and the clamping plate 63 on the inner support part 6 is separated from the second positioning rod 444b, and the clamping plate 63 is smoothly stuck in the slot 55 of the pump cover 5 under the action of elastic recovery.

[0042] In this embodiment, a controller is further included, which is connected to the lifting and turning assembly 1, the first extrusion assembly 2, the second extrusion assembly 3, the hoop pushing robot and the inner support member loading assembly 4 respectively.

[0043] This embodiment also provides an automated production line for assembling a multi-stage centrifugal pump cover, wherein the production and assembly method includes the following steps: S1. Use the lifting and flipping assembly 1 to absorb the pump cover blank 5a and place the pump cover blank 5a in the first working position; use the extrusion block 286 in the first extrusion assembly 2 and the pressure-bearing sleeve 388 in the second extrusion assembly 3 to approach each other, cooperate with the lifting and flipping assembly 1 to drive the pump cover blank 5a to rotate circumferentially, and gradually extrude a plurality of circles of outwardly protruding pressure-resistant convex tubes 57 on the cone 51 of the pump cover blank 5a to obtain the pump cover semi-finished product 5b; use the pressure-bearing block 296 in the first extrusion assembly 2 and the extrusion wheel 398 in the second extrusion assembly 3 to approach each other, cooperate with the lifting and flipping assembly 1 to drive the pump cover semi-finished product 5b to rotate circumferentially, and extrude limiting grooves 58 inwardly on both sides of the pressure-resistant convex tube 57 of the pump cover semi-finished product 5b to obtain the pump cover part 5; S2. Use the hoop bar pushing manipulator to push the hoop bar between the two opposite limiting grooves 58. The pushing of the hoop bar 71 can be carried out before the limiting groove 58 is fully formed. Use the bending pressure wheel 389 in the second extrusion component 3 to apply pressure and bending force to the outer wall of the hoop bar 71 to bend it, and cooperate with the lifting and flipping component 1 to drive the pump cover semi-finished product 5b to rotate circumferentially, so as to realize the installation of multiple circles of outer hoop parts 7 on the outside of the pump cover part 5; the hoop bar pushing manipulator can pre-cut the hoop bar 71 according to the length of the circle it is in, and cut it after it is pushed to the designed length. The fracture of the outer hoop part 7 can be welded by an external welding manipulator according to needs, so that the outer hoop part 7 is connected into a ring body.

[0044] S3. Use the lifting flip assembly 1 to drive the pump cover 5 to move downward from the first station to the second station, and use the inner support loading assembly 4 to install the inner support 6 on the inner side of the pump cover 5.

[0045] The present embodiment provides an automated production line for assembling a multi-stage centrifugal pump cover, which is mainly composed of a lifting and flipping component 1, a first extrusion component 2, a second extrusion component 3, a hoop pushing robot and an inner support member loading component 4. For a reinforced pump cover composed of a pump cover member 5, an inner support member 6 and an outer hoop member 7, the lifting and flipping component 1 is used to adsorb the pump cover blank 5a and drive it to flip around its own axis, which is beneficial for the first extrusion component 2 and the second extrusion component 3 to be used together to extrude and form the pump cover blank 5a into a pump cover semi-finished product 5b and a pump cover member 5 in sequence. The second extrusion component 3 cooperates with the hoop pushing robot to install multiple circles of outer hoop members 7 on the outside of the pump cover member 5, and uses the inner support member loading component 4 to install the inner support member 6 on the inside of the pump cover member 5 that has been displaced to the second workstation. In this way, the automated assembly of the reinforced pump cover can be achieved.

[0046] The reinforced pump cover prepared in this embodiment is composed of a pump cover part 5, an inner support part 6 and an outer hoop part 7. The pump cover part 5 uses the inner support part 6 to improve its overall axial tensile strength. At the same time, the inner support part 6 can provide filtering and impurities blocking for the water inlet; the pump cover part 5 uses the outer hoop part 7 to improve its overall radial compressive strength. In this way, the pump cover can maintain its lightweight advantage while achieving a qualitative improvement in compressive strength and overall rigidity.

[0047] The preferred embodiments of the present invention disclosed above are merely intended to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to specific embodiments. Obviously, many modifications and variations are possible based on the contents of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. An automated production line for assembling a multi-stage centrifugal pump cover, characterized in that: The automated production line includes a lifting and flipping assembly, a first extrusion assembly, a second extrusion assembly, a hoop bar pushing robot, and an inner support member loading assembly. The reinforced pump cover to be assembled consists of a pump cover member, an inner support member, and an outer hoop member. The lifting and flipping assembly is used to absorb the pump cover blank and drive it to flip around its own axis; the lifting and flipping assembly can drive the extruded pump cover to move downward from the first station to the second station; The first extrusion assembly is arranged on the left side of the first workstation, and the second extrusion assembly is arranged on the right side of the first workstation; the first extrusion assembly and the second extrusion assembly are used together to extrude and form the pump cover blank into a pump cover semi-finished product and a pump cover member in sequence, and the second extrusion assembly cooperates with the hoop bar pushing robot to install multiple circles of outer hoops on the outside of the pump cover member; The inner support member loading assembly is arranged at the left side of the second station, and is used to install the inner support member on the inner side of the pump cover member that has been displaced to the second station.

2. The automated production line for assembling a multi-stage centrifugal pump cover according to claim 1, characterized in that: The pump cover blank includes a conical cylinder, a circular end plate is provided at the narrow end of the conical cylinder, a plurality of water inlet grooves are opened on the circular end plate, an annular end plate is provided at the wide end of the conical cylinder, a plurality of grooves are opened inwardly along the circumferential direction on the outer side of the annular end plate, and an external mounting hole is opened through the groove of the annular end plate; the pump cover semi-finished product is formed with a plurality of circles of outwardly protruding pressure-resistant convex tubes on the conical cylinder of the pump cover blank; the pump cover member is formed with inwardly recessed limiting grooves on both sides of the pressure-resistant convex tube of the pump cover semi-finished product for clamping the outer hoop.

3. The automated production line for assembling a multi-stage centrifugal pump cover according to claim 2, characterized in that: The inner support member is composed of an inner support plate, an anti-tensile strip plate and a clamping plate. The specifications of the inner support plate match those of the circular end plate. A number of filter holes are provided on the inner support plate. A number of anti-tensile strip plates are installed circumferentially on the outer edge of the inner support plate. A number of protrusions that can be inserted into the anti-pressure convex tube are provided on the outer side of the anti-tensile strip plate. A clamping plate that matches the clamping groove is provided on the outer end of the anti-tensile strip plate. An installation inner hole that matches the position of the installation outer hole is provided on the clamping plate.

4. The automated production line for assembling a multi-stage centrifugal pump cover according to claim 3, characterized in that: The outer hoop is formed by bending a hoop bar with a T-shaped cross section, and a plurality of hollow holes are opened at equal intervals on the hoop bar.

5. The automated production line for assembling a multi-stage centrifugal pump cover according to claim 4, characterized in that: The lifting and flipping assembly includes a first base plate, a vertical lifting push rod, an annular mounting plate, a first rotary driver, an annular suction cup and a first positioning rod. The cylinder body of the vertical lifting push rod is installed on the first base plate. The movable end of the vertical lifting push rod is installed with the first rotary driver via the annular mounting plate. The movable end of the first rotary driver is installed with an annular suction cup. Several first positioning rods are installed circumferentially on the outer side of the annular suction cup. The specifications of the first positioning rods match the specifications of the mounting inner hole.

6. The automated production line for assembling a multi-stage centrifugal pump cover according to claim 5, characterized in that: The first extrusion assembly includes a second base plate, a first horizontal push rod, a first scissor-type telescopic frame, a first groove plate, a first screw motor, a first screw, a first movable support plate, an internal extrusion mechanism and an internal pressure-bearing mechanism. The first horizontal push rod and the first scissor-type telescopic frame are installed between the second base plate and the first groove plate. The first screw motor is installed on the outer side of the first groove plate. The output end of the first screw motor is connected to the first screw. The first screw is provided with two screw segments with opposite rotation directions. The outer side of each screw segment is sleeved with a first movable support plate. The outer ends of the two first movable support plates are respectively equipped with an internal extrusion mechanism and an internal pressure-bearing mechanism; The inner extrusion mechanism includes a first groove-shaped mounting frame, a first extrusion push rod, a first coupling, a first slide rod, a first mounting plate, an extrusion block and a first sliding sleeve, wherein the first extrusion push rod is mounted on one side plate of the first groove-shaped mounting frame, the movable end of the first extrusion push rod is connected to one end of the first slide rod via the first coupling, the other end of the first slide rod is mounted on the extrusion block via the first mounting plate, and the first sliding sleeve which is sleeved on the outside of the first slide rod is embedded in the other side plate of the first groove-shaped mounting frame; The internal pressure-bearing mechanism includes a second groove-type mounting frame, a first pressure-bearing push rod, a first rotary joint, a second slide rod, a second mounting plate, a pressure block, a first flip motor and a first belt transmission member. A side plate of the second groove-type mounting frame is installed with the first pressure-bearing push rod, the movable end of the first pressure-bearing push rod is connected to one end of the second slide rod via the first rotary joint, the other end of the second slide rod is installed with a pressure block via the second mounting plate, the first flip motor is installed on the second groove-type mounting frame, and the output shaft of the first flip motor is transmission-connected to the second slide rod through the first belt transmission member.

7. The automated production line for assembling a multi-stage centrifugal pump cover according to claim 6, characterized in that: The second extrusion assembly includes a third base plate, a second horizontal push rod, a second scissor-type telescopic frame, a second grooved plate, a second screw motor, a second screw, a second movable support plate, an external pressure-bearing mechanism and an external extrusion mechanism. The second horizontal push rod and the second scissor-type telescopic frame are installed between the third base plate and the second grooved plate. The second screw motor is installed on the outer side of the second grooved plate. The output end of the second screw motor is connected to the second screw. The second screw is provided with two screw segments with opposite rotation directions. The outer side of each screw segment is sleeved with a second movable support plate. The outer ends of the two second movable support plates are respectively installed with an external pressure-bearing mechanism and an external extrusion mechanism; The outer pressure-bearing mechanism includes a third groove-shaped mounting frame, a second pressure-bearing push rod, a second swivel joint, a third slide bar, a third mounting plate, a pressure sleeve, a bending pressure roller, a second flip motor and a second belt transmission member, one side plate of the third groove-shaped mounting frame is installed with a second pressure-bearing push rod, a movable end of the second pressure-bearing push rod is connected to one end of the third slide bar via the second swivel joint, the other end of the third slide bar is installed with a pressure sleeve and a bending pressure roller via the third mounting plate, the second flip motor is installed on the third groove-shaped mounting frame, and the output shaft of the second flip motor is transmission-connected to the third slide bar via the second belt transmission member; The external extrusion mechanism includes a fourth groove-type mounting frame, a second extrusion push rod, a second coupling, a fourth slide bar, a second sleeve, a fourth mounting plate, a mechanical clamp and an extrusion wheel. A side plate of the fourth groove-type mounting frame is installed with the second extrusion push rod, the movable end of the second extrusion push rod is connected to one end of the fourth slide bar via a coupling, the other end of the fourth slide bar is installed with a mechanical clamp via a fourth mounting plate, the other side plate of the fourth groove-type mounting frame is embedded with a second sleeve sleeved on the outside of the fourth slide bar, and the mechanical clamp is located on two relatively displaced clamps and an extrusion wheel is installed.

8. The automated production line for assembling a multi-stage centrifugal pump cover according to claim 7, characterized in that: The inner support member loading assembly includes a fourth base plate, a third horizontal push rod, a third scissors-type telescopic frame and a clamping mechanism, and a third horizontal push rod and a third scissors-type telescopic frame are installed between the fourth base plate and the clamping mechanism; the clamping mechanism includes a circular box, a second rotary drive, a turntable and a clamping member, the interior of the circular box is installed with a second rotary drive, and the movable end of the second rotary drive is installed with a turntable, and the clamping member is composed of a clamping head and a second positioning rod fixed thereto, and the outer plate of the circular box is provided with a plurality of radial sliding grooves along the circumferential direction for facilitating the radial displacement of the tensile strips and the clamping plates in the inner support member, the specifications of the second positioning rod are matched with the specifications of the mounting inner hole, and the outer side of the turntable is provided with a plurality of arc sliding grooves along the circumferential direction that match the clamping head in the clamping member.

9. The automated production line for assembling a multi-stage centrifugal pump cover according to claim 8, characterized in that: It also includes a controller, which is respectively connected to the lifting and turning assembly, the first extrusion assembly, the second extrusion assembly, the hoop pushing robot and the inner support member feeding assembly.

10. The automated production line for assembling a multi-stage centrifugal pump cover according to claim 9, characterized in that: The production and assembly method includes the following steps: S1. Using the lifting and flipping assembly to absorb the pump cover blank and place the pump cover blank in the first working position; using the extrusion block in the first extrusion assembly and the pressure-bearing sleeve in the second extrusion assembly to approach each other, the lifting and flipping assembly is used to drive the pump cover blank to rotate circumferentially, and gradually extrude and form a plurality of circles of outwardly protruding pressure-resistant convex tubes on the conical cylinder of the pump cover blank to obtain a semi-finished pump cover; using the pressure-bearing block in the first extrusion assembly and the extrusion wheels in the second extrusion assembly to approach each other, the lifting and flipping assembly is used to drive the pump cover semi-finished product to rotate circumferentially, and extrude and form limiting grooves on both sides of the pressure-resistant convex tube of the pump cover semi-finished product to obtain a pump cover piece; S2, using the hoop bar pushing manipulator to push the hoop bar between the two opposite limit grooves, using the bending pressure wheel in the second extrusion assembly to bend the hoop bar, and cooperating with the lifting and turning assembly to drive the pump cover semi-finished product to rotate circumferentially, so as to realize the installation of multiple turns of outer hoop parts on the outer side of the pump cover; S3. Use the lifting flip assembly to drive the pump cover to move downward from the first station to the second station, and use the inner support loading assembly to install the inner support on the inner side of the pump cover.

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