An automatic production line for assembling a multistage centrifugal pump cover

Abstract

The present application belongs to the technical field of multistage centrifugal pump production, and particularly relates to an automatic production line for assembling a multistage centrifugal pump cover, which mainly comprises a lifting overturning assembly, a first extrusion assembly, a second extrusion assembly, a hoop pushing mechanical hand and an inner support piece loading assembly. The lifting overturning assembly is used to adsorb a pump cover blank, and drive it to make overturning movement around its own axis, which is beneficial to the first extrusion assembly and the second extrusion assembly for sequentially extruding the pump cover blank into a pump cover semi-finished product and a pump cover piece. The second extrusion assembly cooperates with the hoop pushing mechanical hand to add a plurality of outer hoop pieces to the outside of the pump cover piece. The inner support piece loading assembly is used to add an inner support piece to the inside of the pump cover piece which has been displaced to the second station. In this way, the automatic assembly of the reinforced pump cover can be realized. The reinforced pump cover maintains the lightweight advantage while the compression strength and overall rigidity are improved in quality.

Description

Technical Field

[0001] This invention belongs to the field of multi-stage centrifugal pump manufacturing technology, specifically relating to an automated production line for assembling multi-stage centrifugal pump covers. Background Technology

[0002] Multistage centrifugal pumps are characterized by their compact overall structure, small size, light weight, low noise, significant energy-saving effect, and convenient maintenance. They adopt standard motors and quick-install mechanical seals, making replacement very convenient. All flow parts of the pump are made of stainless steel, making them suitable for mildly corrosive media. When the motor drives the impeller on the shaft to rotate at high speed, the liquid filling the impeller is thrown from the center of the impeller to the periphery of the impeller along the flow channels between the blades under the action of centrifugal force. Due to the action of the blades, the pressure and velocity of the liquid increase simultaneously. It is then guided to the next stage impeller through the flow channels of the guide casing. In this way, the liquid flows through all the impellers and guide casings in succession, further increasing the pressure energy of the liquid.

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

[0004] Traditional automated production lines for assembling multistage centrifugal pump covers have shortcomings. First, they cannot meet the automated assembly requirements of reinforced pump covers. Second, they cannot achieve a reliable connection with the inner and outer reinforcing supports while the reinforcing ring of the pump cover blank is being formed, resulting in additional cumbersome assembly processes and increased manufacturing costs. Therefore, it is necessary to optimize and improve the automated production lines for assembling traditional multistage centrifugal pump covers. Summary of the Invention

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

[0006] To achieve the above-mentioned technical objectives and effects, the present invention is implemented through the following technical solution:

[0007] An automated production line for assembling a multi-stage centrifugal pump cover includes a lifting and tilting assembly, a first extrusion assembly, a second extrusion assembly, a hoop pushing robot, and an inner support feeding assembly. The reinforced pump cover to be assembled consists of a pump cover component, an inner support component, and an outer hoop component.

[0008] The lifting and flipping assembly is used to adsorb the pump cover blank and drive it to flip around its own axis; the lifting and flipping assembly can drive the extruded pump cover part to move downward from the first station to the second station.

[0009] The first extrusion assembly is located on the left side of the first station, and the second extrusion assembly is located on the right side of the first station. The first extrusion assembly and the second extrusion assembly are used together to extrude the pump cover blank into pump cover semi-finished products and pump cover parts in sequence. The second extrusion assembly, together with the hoop pushing robot, adds multiple outer hoop parts to the outside of the pump cover parts.

[0010] The inner support feeding assembly is located on the left side of the second station and is used to install an inner support inside the pump cover component that has been displaced to the second station.

[0011] Furthermore, in the aforementioned automated production line for assembling multi-stage centrifugal pump covers, the pump cover blank includes a conical cylinder. The narrow end of the conical cylinder is provided with a round end plate, and the round end plate is provided with several water inlet grooves. The wide end of the conical cylinder is provided with an annular end plate, and the outer side of the annular end plate is provided with several slots circumferentially inward. The annular end plate is provided with an external mounting hole through the slots. The pump cover semi-finished product has several outwardly protruding pressure-resistant convex tubes formed on the conical cylinder of the pump cover blank. The pump cover component has inwardly recessed limiting grooves on both sides of the pressure-resistant convex tubes of the pump cover semi-finished product to facilitate clamping the outer hoop component.

[0012] Furthermore, in the automated production line for assembling the pump cover of the aforementioned multi-stage centrifugal pump, the inner support component consists of an inner support plate, a tensile strip plate, and a clamping plate. The specifications of the inner support plate are matched with those of the round end plate. The inner support plate has several filter holes. Several tensile strip plates are installed circumferentially along the outer edge of the inner support plate. Several protrusions that can be inserted into the anti-pressure convex tube are provided on the outer side of the tensile strip plate. The outer end of the tensile strip plate is provided with a clamping plate that matches the clamping groove. The clamping plate has an inner mounting hole that matches the position of the outer mounting hole.

[0013] Furthermore, in the automated production line for assembling the pump cover of the aforementioned multi-stage centrifugal pump, the outer hoop is formed by bending a hoop bar with a T-shaped cross-section, and the hoop bar has several hollow holes spaced at equal intervals.

[0014] Furthermore, in the aforementioned automated production line for assembling the pump cover of a 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 driver, an annular suction cup, and a first positioning rod. The cylinder of the vertical lifting push rod is mounted on the first base plate. The movable end of the vertical lifting push rod is mounted with the first rotary driver via the annular mounting plate. The movable end of the first rotary driver is mounted with the annular suction cup. Several first positioning rods are mounted circumferentially on the outer side of the annular suction cup. The specifications of the first positioning rods are matched with the specifications of the mounting inner hole.

[0015] Furthermore, in the aforementioned automated production line for assembling the pump cover of a multi-stage centrifugal pump, the first extrusion assembly includes a second base plate, a first horizontal push rod, a first scissor telescopic frame, a first channel plate, a first lead screw motor, a first lead screw, a first movable support plate, an inner extrusion mechanism, and an inner pressure bearing mechanism. The first horizontal push rod and the first scissor telescopic frame are installed between the second base plate and the first channel plate. The first lead screw motor is installed on the outer side of the first channel plate. The output end of the first lead screw motor is connected to the first lead screw. The first lead screw has two lead screw segments with opposite rotation directions. A first movable support plate is sleeved on the outer side of each lead screw segment. The inner extrusion mechanism and the inner pressure bearing mechanism are respectively installed on the outer ends of the two first movable support plates.

[0016] The internal extrusion mechanism includes a first grooved 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. The first extrusion push rod is mounted on one side plate of the first grooved 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 with an extrusion block via the first mounting plate. 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 grooved mounting frame.

[0017] The internal pressure-bearing mechanism includes a second groove-shaped mounting bracket, a first pressure-bearing push rod, a first rotary joint, a second slide rod, a second mounting plate, a pressure-bearing block, a first tilting motor, and a first belt drive component. The first pressure-bearing push rod is mounted on one side plate of the second groove-shaped mounting bracket. 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 mounted on the second mounting plate with a pressure-bearing block. The first tilting motor is mounted on the second groove-shaped mounting bracket. The output shaft of the first tilting motor is connected to the second slide rod via the first belt drive component.

[0018] Furthermore, in the aforementioned automated production line for assembling the pump cover of a multi-stage centrifugal pump, the second extrusion assembly includes a third base plate, a second horizontal push rod, a second scissor telescopic frame, a second channel plate, a second lead screw motor, a second lead 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 telescopic frame are installed between the third base plate and the second channel plate. The second lead screw motor is installed on the outer side of the second channel plate. The output end of the second lead screw motor is connected to the second lead screw. The second lead screw has two lead screw segments with opposite rotation directions. A second movable support plate is sleeved on the outer side of each lead screw segment. The outer ends of the two second movable support plates are respectively installed with an external pressure bearing mechanism and an external extrusion mechanism.

[0019] The external pressure-bearing mechanism includes a third groove-shaped mounting frame, a second pressure-bearing push rod, a second rotary joint, a third slide rod, a third mounting plate, a pressure-bearing sleeve, a bending pressure roller, a second tilting motor, and a second belt drive component. The second pressure-bearing push rod is mounted on one side plate of the third groove-shaped mounting frame. The movable end of the second pressure-bearing push rod is connected to one end of the third slide rod via the second rotary joint. The other end of the third slide rod is mounted with a pressure-bearing sleeve and a bending pressure roller via the third mounting plate. The second tilting motor is mounted on the third groove-shaped mounting frame. The output shaft of the second tilting motor is connected to the third slide rod via the second belt drive component.

[0020] The external extrusion mechanism includes a fourth groove-shaped mounting bracket, a second extrusion push rod, a second coupling, a fourth slide rod, a second sliding sleeve, a fourth mounting plate, mechanical grippers, and extrusion wheels. The second extrusion push rod is mounted on one side plate of the fourth groove-shaped mounting bracket. The movable end of the second extrusion push rod is connected to one end of the fourth slide rod via the second coupling. The other end of the fourth slide rod is mounted with mechanical grippers via the fourth mounting plate. The second sliding sleeve, which is sleeved on the outside of the fourth slide rod, is embedded in the other side plate of the fourth groove-shaped mounting bracket. Extrusion wheels are mounted on the two relatively displaced grippers of the mechanical grippers.

[0021] Furthermore, in the aforementioned automated production line for assembling the multi-stage centrifugal pump cover, the inner support component feeding assembly includes a fourth base plate, a third horizontal push rod, a third scissor telescopic frame, and a clamping mechanism. The third horizontal push rod and the third scissor telescopic frame are installed between the fourth base plate and the clamping mechanism. The clamping mechanism includes a circular box, a second rotary driver, a turntable, and a clamping member. The second rotary driver is installed inside the circular box, and the turntable is installed at the movable end of the second rotary driver. The clamping member consists of a clamping head and a second positioning rod fixed thereto. The outer side plate of the circular box is provided with multiple radial grooves along the circumference to facilitate the radial displacement of the tensile strip plate and the clamping plate in the inner support component. The specifications of the second positioning rod are matched with the specifications of the mounting inner hole. The outer side of the turntable is provided with multiple arc-shaped grooves along the circumference to match the clamping head in the clamping member.

[0022] Furthermore, the automated production line for assembling the multi-stage centrifugal pump cover also includes a controller, which is connected to the lifting and tilting assembly, the first extrusion assembly, the second extrusion assembly, the hoop pushing robot, and the inner support feeding assembly.

[0023] This invention also provides an automated production line for assembling multi-stage centrifugal pump covers, the assembly method of which includes the following steps:

[0024] S1. The pump cover blank is adsorbed by the lifting and flipping assembly and placed in the first working position. The pump cover blank is rotated circumferentially by the mutual approach of the extrusion block in the first extrusion assembly and the pressure-bearing sleeve in the second extrusion assembly, and the pump cover blank is gradually extruded and formed on the conical cylinder of the pump cover blank to obtain a pump cover semi-finished product. The pump cover semi-finished product is rotated circumferentially by the mutual approach of the pressure-bearing block in the first extrusion assembly and the extrusion wheel in the second extrusion assembly, and the pump cover semi-finished product is extruded and formed inward on both sides of the pressure-bearing convex tube of the pump cover semi-finished product to obtain a pump cover part.

[0025] S2. The hoop is pushed between two opposite limiting grooves by the hoop pushing robot arm. The hoop is bent by the bending pressure roller in the second extrusion assembly. The pump cover semi-finished product is rotated circumferentially by the lifting and flipping assembly to add multiple outer hoop pieces to the outside of the pump cover.

[0026] S3. Using the lifting and tilting assembly, the pump cover is moved downward from the first station to the second station, and the inner support is installed on the inside of the pump cover using the inner support feeding assembly.

[0027] The beneficial effects of this invention are:

[0028] 1. This invention provides an automated production line for assembling multi-stage centrifugal pump covers, which mainly consists of a lifting and tilting assembly, a first extrusion assembly, a second extrusion assembly, a hoop pushing robot, and an inner support feeding assembly. For reinforced pump covers composed of pump cover parts, inner supports, and outer hoop parts, the lifting and tilting assembly is used to adsorb the pump cover blank and drive it to rotate around its own axis. The first and second extrusion assemblies work together to extrude the pump cover blank into pump cover semi-finished products and pump cover parts in sequence. The second extrusion assembly, in conjunction with the hoop pushing robot, adds multiple outer hoop parts to the outside of the pump cover part. The inner support feeding assembly adds inner supports to the inside of the pump cover part that has been moved to the second station. In this way, the automated assembly of reinforced pump covers can be achieved.

[0029] 2. The reinforced pump cover prepared by the present invention consists of a pump cover component, an inner support component, and an outer hoop component. The pump cover component uses the inner support component to improve its overall axial tensile strength, while the inner support component can provide filtration and impurity blocking for the water inlet. The pump cover component uses the outer hoop component to improve its overall radial compressive strength. In this way, the pump cover maintains its lightweight advantage while significantly improving its compressive strength and overall rigidity.

[0030] Of course, any product implementing this invention does not necessarily need to achieve all of the above advantages at the same time. Attached Figure Description

[0031] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0033] Figure 2 This is a schematic diagram of the reinforced pump cover in this invention;

[0034] Figure 3 This is a half-sectional schematic diagram of the reinforced pump cover in this invention;

[0035] Figure 4 This is an exploded view of the reinforced pump cover in this invention;

[0036] Figure 5 This is a schematic diagram of the processing flow of the pump cover component in this invention;

[0037] Figure 6 This is a half-sectional schematic diagram of the pump cover component in this invention;

[0038] Figure 7 This is a schematic diagram of the internal support member in this invention;

[0039] Figure 8 This is a schematic diagram of the structure of the outer hoop in this invention;

[0040] Figure 9 This is a schematic diagram of the lifting and flipping assembly in this invention;

[0041] Figure 10 This is a schematic diagram of the structure of the first extrusion assembly in this invention;

[0042] Figure 11 This is a schematic diagram of the internal extrusion mechanism in this invention;

[0043] Figure 12This is a schematic diagram of the internal pressure-bearing mechanism in this invention;

[0044] Figure 13 This is a schematic diagram of the structure of the second extrusion assembly in this invention;

[0045] Figure 14 This is a schematic diagram of the external pressure-bearing mechanism in this invention;

[0046] Figure 15 This is a schematic diagram of the external extrusion mechanism in this invention;

[0047] Figure 16 This is a schematic diagram of the internal support feeding assembly in this invention;

[0048] Figure 17 This is a schematic diagram of the clamping mechanism in this invention;

[0049] Figure 18 This is a schematic diagram of the radial groove structure in this invention;

[0050] Figure 19 This is a schematic diagram of the arc-shaped groove in the present invention;

[0051] Figure 20 This is a schematic diagram of the clamping component in this invention;

[0052] In the attached diagram, the components represented by each number are as follows:

[0053] 1-Lifting and flipping assembly, 11-First base plate, 12-Vertical lifting push rod, 13-Annular mounting plate, 14-First rotary driver, 15-Annular suction cup, 16-First positioning rod;

[0054] 2-First extrusion assembly, 21-Second base plate, 22-First horizontal push rod, 23-First scissor telescopic frame, 24-First channel plate, 25-First lead screw motor, 26-First lead screw, 27-First movable support plate, 28-Inner extrusion mechanism, 281-First channel 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 channel 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 tilting motor, 298-First belt drive component;

[0055] 3-Second extrusion assembly, 31-Third base plate, 32-Second horizontal push rod, 33-Second scissor telescopic frame, 34-Second slotted plate, 35-Second lead screw motor, 36-Second lead screw, 37-Second movable support plate, 38-External pressure bearing mechanism, 381-Third slotted mounting frame, 382-Second pressure bearing push rod, 383-Second rotary joint, 384-Third slide rod, 385-Third mounting plate, 386-Second tilting motor, 387-Second belt drive component, 388-Pressure bearing sleeve, 389-Bending pressure roller, 39-External extrusion mechanism, 391-Fourth slotted mounting frame, 392-Second extrusion push rod, 393-Second coupling, 394-Fourth slide rod, 395-Second slide sleeve, 396-Fourth mounting plate, 397-Mechanical gripper, 398-Extrusion roller;

[0056] 4-Inner support feeding assembly, 41-Fourth base plate, 42-Third horizontal push rod, 43-Third scissor telescopic frame, 44-Clamping mechanism, 441-Circular box, 442-Second rotary driver, 443-Turntable, 444-Clamping component, 444a-Clamping head, 444b-Second positioning rod, 445-Radial groove, 446-Arc-shaped groove;

[0057] 5-Pump cover part, 5a-Pump cover blank, 5b-Pump cover semi-finished product, 51-Conical cylinder, 52-Round end plate, 53-Water inlet groove, 54-Annular end plate, 55-Slot, 56-Mounting outer hole, 57-Pressure-resistant protruding tube, 58-Limiting groove;

[0058] 6-Inner support component, 61-Inner support plate, 62-Tension strip plate, 63-Clamping plate, 64-Filter hole, 65-Protrusion, 66-Inner mounting hole;

[0059] 7-Outer hoop, 71-Hoop bar, 72-Hollow hole. Detailed Implementation

[0060] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0061] like Figures 1-4As shown, this embodiment provides an automated production line for assembling multi-stage centrifugal pump covers. The automated production line includes a lifting and tilting assembly 1, a first extrusion assembly 2, a second extrusion assembly 3, a hoop pushing robot, and an inner support component feeding assembly 4. The reinforced pump cover to be assembled consists of a pump cover component 5, an inner support component 6, and an outer hoop component 7. The lifting and tilting assembly 1 is used to adsorb the pump cover blank 5a and drive it to tilt around its own axis. The lifting and tilting assembly 1 can drive the extruded pump cover component 5 to move downwards from the first station to the second station. The first extrusion assembly 2 is located on the left side of the first station, and the second extrusion assembly 3 is located on the right side of the first station. The first extrusion assembly 2 and the second extrusion assembly 3 work together to sequentially extrude the pump cover blank 5a into a pump cover semi-finished product 5b and the pump cover component 5. The second extrusion assembly 3, in conjunction with the hoop pushing robot, adds multiple rings of outer hoop components 7 to the outside of the pump cover component 5. The inner support feeding assembly 4 is located on the left side of the second station and is used to install the inner support 6 inside the pump cover 5 that has been moved to the second station.

[0062] like Figures 5-6 As shown, the pump cover blank 5a includes a conical cylinder 51. The narrow end of the conical cylinder 51 is provided with a round end plate 52, and the round end plate 52 is provided with several fan-shaped annular water inlet grooves 53 along the circumferential direction. The wide end of the conical cylinder 51 is provided with an annular end plate 54, and the outer side of the annular end plate 54 is provided with several slots 55 along the circumferential direction. The annular end plate 54 is provided with an external mounting hole 56 through the slots. The pump cover semi-finished product 5b has several rings of outwardly protruding pressure-resistant protrusions 57 formed on the conical cylinder 51 of the pump cover blank 5a; the pump cover part 5 has inwardly recessed limiting grooves 58 on both sides of the pressure-resistant protrusions 57 of the pump cover semi-finished product 5b to facilitate clamping the outer hoop 7.

[0063] like Figure 7 As shown, the inner support member 6 consists of an inner support plate 61, tensile strips 62, and a retaining plate 63. The specifications of the inner support plate 61 are matched with those of the round end plate 52. The inner support plate 61 has several filter holes 64. Several tensile strips 62 are installed circumferentially along the outer edge of the inner support plate 61. Several protrusions 65 that can be inserted into the inner cavity of the pressure-resistant protrusion tube 57 are provided on the outer side of the tensile strips 62. The protrusions 65 are hemispherical. The outer end of the tensile strips 62 is provided with a retaining plate 63 that mates with the retaining groove 55. The retaining plate 63 has an inner mounting hole 66 that mates with the position of the outer mounting hole 56.

[0064] like Figure 8 As shown, the outer hoop 7 is formed by bending a hoop bar 71 with a T-shaped cross-section. Several hollow holes 72 are equally spaced on the hoop bar 71. The design of the hollow holes 72 can reduce the overall weight of the outer hoop 7 and reduce the difficulty of bending.

[0065] like Figure 9As 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 circumferentially mounted on the outer side of the annular suction cup 15, and the specifications of the first positioning rods 16 are matched with the specifications of the mounting inner hole 66. Several suction holes for adsorbing the annular end plate 54 in the pump cover blank 5a are opened on the outer side of the annular suction cup 15.

[0066] The working principle of the lifting and flipping assembly 1 is as follows: the annular suction cup 15 is used to adsorb and lock the pump cover blank 5a, the first rotary driver 14 is used to drive the adsorbed and locked pump cover blank 5a to rotate at a fixed angle in the circumference, the first positioning rod 16 is used to ensure the torsional force of the rotation, and the vertical lifting push rod 12 is used to drive the adsorbed and locked pump cover blank 5a to move vertically.

[0067] 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 telescopic frame 23, a first channel plate 24, a first lead screw motor 25, a first lead screw 26, a first movable support plate 27, an inner extrusion mechanism 28, and an inner pressure bearing mechanism 29. The first horizontal push rod 22 and the first scissor telescopic frame 23 are installed between the second base plate 21 and the first channel plate 24. The first lead screw motor 25 is installed on the outer side of the first channel plate 24. The output end of the first lead screw motor 25 is connected to the first lead screw 26. The first lead screw 26 has two lead screw segments with opposite rotation directions. A first movable support plate 27 is sleeved on the outer side of each lead screw segment. The inner extrusion mechanism 28 and the inner pressure bearing mechanism 29 are respectively installed on the outer ends of the two first movable support plates 27.

[0068] The working principle of the first extrusion assembly 2 is as follows: the first horizontal push rod 22 is used to drive the inner extrusion mechanism 28 and the inner pressure bearing mechanism 29 to perform horizontal displacement. The first scissor telescopic frame 23 is used to ensure the stability of the horizontal displacement. The first slotted plate 24, the first lead screw motor 25, the first lead screw 26, and the first movable support plate 27 constitute the first lead screw drive system. The first lead screw drive system is used to drive the inner extrusion mechanism 28 and the inner pressure bearing mechanism 29 to move closer or further apart.

[0069] like Figure 11As shown, the internal extrusion mechanism 28 includes a first grooved mounting bracket 281, a first extrusion push rod 282, a first coupling 283, a first slide rod 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 grooved mounting bracket 281. The movable end of the first extrusion push rod 282 is connected to one end of the first slide rod 284 via the first coupling. The other end of the first slide rod 284 is mounted with the extrusion block 286 via the first mounting plate 285. The first sliding sleeve 287, fitted onto the outside of the first slide rod 284, is embedded in the other side plate of the first grooved mounting bracket 281. The shape of the extrusion block 286 matches the shape of the inner wall of the pressure-resistant convex tube 57.

[0070] The working principle of the internal extrusion mechanism 28 is as follows: the first extrusion push rod 282 drives the extrusion block 286 to make 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.

[0071] like Figure 12 As shown, the internal pressure-bearing mechanism 29 includes a second slotted mounting bracket 291, a first pressure-bearing push rod 292, a first rotary joint 293, a second slide rod 294, a second mounting plate 295, a pressure block 296, a first tilting motor 297, and a first belt drive component 298. The first pressure-bearing push rod 292 is mounted on one side plate of the second slotted mounting bracket 291. The movable end of the first pressure-bearing push rod 292 is connected to one end of the second slide rod 294 via the first rotary joint 293. The other end of the second slide rod 294 is mounted on the pressure block 296 via the second mounting plate 295. The first tilting motor 297 is mounted on the second slotted mounting bracket 291. The output shaft of the first tilting motor 297 is connected to the second slide rod 294 via the first belt drive component 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... Figure 12 At the position shown, inner pressure-bearing areas 296b are formed on both sides to provide external support for the extrusion molding of the limiting groove 58. When the T-shaped head 296a continues to rotate 90 degrees, the projection of the T-shaped head 296a along the axial direction of the pressure block 296 can be covered by the axial projection of the narrow part of the T-shaped head 296a itself, that is, the T-shaped head 296a can be disengaged from the pressure-resistant protrusion 57 that forms the limiting groove 58 by rotating 90 degrees.

[0072] The working principle of the inner pressure bearing mechanism 29 is as follows: the first pressure bearing push rod 292 drives the pressure bearing block 296 to make axial displacement, and the first flipping system composed of the second slide rod 294, the first flipping motor 297 and the first belt drive component 298 drives the pressure bearing block 296 to flip 90 degrees, which facilitates the subsequent disengagement operation of the pressure bearing block 296 from the pressure-resistant convex tube 57.

[0073] like Figure 13As shown, the second extrusion assembly 3 includes a third base plate 31, a second horizontal push rod 32, a second scissor telescopic frame 33, a second channel plate 34, a second lead screw motor 35, a second lead 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 telescopic frame 33 are installed between the third base plate 31 and the second channel plate 34. The second lead screw motor 35 is installed on the outer side of the second channel plate 34. The output end of the second lead screw motor 35 is connected to the second lead screw 36. The second lead screw 36 has two lead screw segments with opposite rotation directions. The outer side of each lead screw segment is fitted with a second movable support plate 37. The outer ends of the two second movable support plates 37 are respectively fitted with the external pressure bearing mechanism 38 and the external extrusion mechanism 39.

[0074] The working principle of the second extrusion assembly 3 is as follows: the second horizontal push rod 32 is used to drive the outer pressure bearing mechanism 38 and the outer extrusion mechanism 39 to perform horizontal displacement. The second scissor telescopic frame 33 is used to ensure the stability of the horizontal displacement. The second slotted plate 34, the second lead screw motor 35, the second lead screw 36, and the second movable support plate 37 constitute the second lead screw drive system. The second lead screw drive system is used to drive the outer pressure bearing mechanism 38 and the outer extrusion mechanism 39 to move closer or further apart.

[0075] like Figure 14 As shown, the external pressure-bearing mechanism 38 includes a third groove-shaped mounting bracket 381, a second pressure-bearing push rod 382, ​​a second rotary joint 383, a third slide rod 384, a third mounting plate 385, a pressure-bearing sleeve 388, a bending pressure roller 389, a second tilting motor 386, and a second belt drive component 387. The second pressure-bearing push rod 382 is mounted on one side plate of the third groove-shaped mounting bracket 381. The movable end of the second pressure-bearing push rod 382 is connected to one end of the third slide rod 384 via the second rotary joint 383. The other end of the third slide rod 384 is mounted with the pressure sleeve 388 and the bending pressure roller 389 via the third mounting plate 385. The second tilting motor 386 is mounted on the third groove-shaped mounting bracket 381. The output shaft of the second tilting motor 386 is connected to the third slide rod 384 via the second belt drive component 387.

[0076] The working principle of the external pressure bearing mechanism 38 is as follows: The second pressure bearing push rod 382 drives the pressure bearing sleeve 388 or the bending pressure roller 389 to make axial displacement. The second flipping system, which is composed of the third slide rod 384, the second flipping motor 386 and the second belt drive component 387, drives the third mounting plate 385 to flip 180 degrees, so that the positions of the pressure bearing sleeve 388 and the bending pressure roller 389 can be interchanged.

[0077] like Figure 15As shown, the external extrusion mechanism 39 includes a fourth groove-shaped mounting bracket 391, a second extrusion push rod 392, a second coupling 393, a fourth slide rod 394, a second sliding 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 groove-shaped mounting bracket 391. The movable end of the second extrusion push rod 392 is connected to one end of the fourth slide rod 394 via the second coupling. The other end of the fourth slide rod 394 is mounted with a mechanical gripper 397 via the fourth mounting plate 396. The second sliding sleeve 395, sleeved on the outside of the fourth slide rod 394, is embedded in the other side plate of the fourth groove-shaped mounting bracket 391. The mechanical gripper 397 has an extrusion wheel 398 mounted on two relatively displaced grippers. The roller thickness of the extrusion wheel 398 matches the inner cavity specifications of the limiting groove 58.

[0078] The working principle of the external extrusion mechanism 39 is as follows: the second extrusion push rod 392 drives the mechanical gripper 397 to move axially via the second coupling 393, the fourth slide rod 394, and the fourth mounting plate 396. The second sliding sleeve 395 provides guidance for the displacement of the fourth slide rod 394. The mechanical gripper 397 drives the two extrusion wheels 398 to move closer or further apart.

[0079] like Figures 16-20 As shown, the inner support feeding assembly 4 includes a fourth base plate 41, a third horizontal push rod 42, a third scissor telescopic frame 43, and a clamping mechanism 44. The third horizontal push rod 42 and the third scissor telescopic frame 43 are installed 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 installed inside the circular box 441, and the turntable 443 is installed at the movable end of the second rotary driver 442. The clamping member 444 consists of a clamping head 444a and a second positioning rod 444b fixed thereon. The outer side plate of the circular box 441 is provided with a plurality of radial grooves 445 along the circumference to facilitate the radial displacement of the tensile strip plate 62 and the clamping plate 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 provided with a plurality of arc-shaped grooves 446 along the circumference to cooperate with the clamping head 444a in the clamping member 444.

[0080] The working principle of the inner support component feeding assembly 4: The third horizontal push rod 42 drives the clamping mechanism 44 to perform horizontal displacement, and the third scissor telescopic frame 43 ensures the stability of the horizontal displacement. The clamping mechanism 44 uses the second rotary driver 442 to drive the turntable 443 to rotate. The turntable 443 drives the clamping component 444 to perform radial displacement along the radial slide groove 445, so that the clamping plates 63 of the inner support component 6 inserted on the clamping component 444 move closer to each other; when the third horizontal push rod 42 pushes the inner support plate 61 of the inner support component 6 against... When the pump cover 5 is inside the round end plate 52, 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 6 move away from each other, and the protrusions 65 of the clamping plates 63 are then inserted into the inner cavity of the corresponding pressure-resistant protrusion tube 57; then the unloading robot is used to detach the pump cover 5 from the lifting and flipping assembly 1 in the horizontal direction, and the clamping plates 63 on the inner support 6 are detached from the second positioning rod 444b. Under the elastic recovery action, the clamping plates 63 are smoothly inserted into the slots 55 of the pump cover 5.

[0081] In this embodiment, a controller is also included, which is connected to the lifting and flipping assembly 1, the first extrusion assembly 2, the second extrusion assembly 3, the hoop pushing robot and the inner support feeding assembly 4 respectively.

[0082] This embodiment also provides an automated production line for assembling multi-stage centrifugal pump covers, the assembly method of which includes the following steps:

[0083] S1. The pump cover blank 5a is adsorbed by the lifting and flipping assembly 1 and placed in the first working position. The extrusion block 286 in the first extrusion assembly 2 and the pressure sleeve 388 in the second extrusion assembly 3 approach each other, and the pump cover blank 5a is rotated circumferentially by the lifting and flipping assembly 1. Several rings of outwardly protruding pressure-resistant convex tubes 57 are gradually extruded on the cone 51 of the pump cover blank 5a to obtain the pump cover semi-finished product 5b. The pressure-resistant block 296 in the first extrusion assembly 2 and the extrusion wheel 398 in the second extrusion assembly 3 approach each other, and the pump cover semi-finished product 5b is rotated circumferentially by the lifting and flipping assembly 1. Limiting grooves 58 are extruded inwardly on both sides of the pressure-resistant convex tubes 57 of the pump cover semi-finished product 5b to obtain the pump cover part 5.

[0084] S2. A hoop 71 is pushed between two opposing limiting grooves 58 using a hoop pushing robot. The pushing of the hoop 71 can be carried out before the limiting grooves 58 are fully formed. The bending pressure roller 389 in the second extrusion assembly 3 applies pressure and bending force to the outer wall of the hoop 71, bending it. In conjunction with the lifting and flipping assembly 1, the pump cover semi-finished product 5b is rotated circumferentially, thereby adding multiple rings of outer hoop 7 to the outside of the pump cover part 5. The hoop 71 pushed by the hoop pushing robot can be pre-cut according to the length of the ring, or cut after being pushed to the designed length. The cut ends of the outer hoop 7 can be welded using an external welding robot as needed, so that the outer hoop 7 are connected into a ring.

[0085] S3. Using the lifting and tilting assembly 1, the pump cover 5 is moved downward from the first station to the second station, and the inner support 6 is installed on the inner side of the pump cover 5 using the inner support feeding assembly 4.

[0086] This embodiment provides an automated production line for assembling multi-stage centrifugal pump covers. It mainly consists of a lifting and flipping assembly 1, a first extrusion assembly 2, a second extrusion assembly 3, a hoop pushing robot, and an inner support component feeding assembly 4. For a reinforced pump cover composed of a pump cover component 5, an inner support component 6, and an outer hoop component 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 first extrusion assembly 2 and the second extrusion assembly 3 work together to extrude the pump cover blank 5a into a pump cover semi-finished product 5b and a pump cover component 5. The second extrusion assembly 3, in conjunction with the hoop pushing robot, adds multiple outer hoop components 7 to the outside of the pump cover component 5. The inner support component feeding assembly 4 adds an inner support component 6 to the inside of the pump cover component 5 after it has been moved to the second station. In this way, the automated assembly of the reinforced pump cover can be achieved.

[0087] The reinforced pump cover prepared in this embodiment consists of a pump cover component 5, an inner support component 6, and an outer hoop component 7. The pump cover component 5 uses the inner support component 6 to improve its overall axial tensile strength, while the inner support component 6 can provide filtration and impurity blocking for the water inlet. The pump cover component 5 uses the outer hoop component 7 to improve its overall radial compressive strength. In this way, the pump cover maintains its lightweight advantage while significantly improving its compressive strength and overall rigidity.

[0088] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to specific implementations. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. An automated production line for assembling pump covers for multi-stage centrifugal pumps, characterized in that, The automated production line includes a lifting and tilting assembly, a first extrusion assembly, a second extrusion assembly, a hoop pushing robot, and an inner support component feeding assembly. The reinforced pump cover to be assembled consists of a pump cover component, an inner support component, and an outer hoop component. The lifting and flipping assembly is used to adsorb the pump cover blank and drive it to flip around its own axis; the lifting and flipping assembly can drive the extruded pump cover part to move downward from the first station to the second station; 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 of the vertical lifting push rod is mounted on the first base plate. The movable end of the vertical lifting push rod is mounted with the first rotary driver through the annular mounting plate. The movable end of the first rotary driver is mounted with the annular suction cup. Several first positioning rods are mounted circumferentially on the outer side of the annular suction cup. The specifications of the first positioning rods are matched with the specifications of the mounting inner hole. The first extrusion assembly is located on the left side of the first station, and the second extrusion assembly is located on the right side of the first station. The first and second extrusion assemblies are used together to extrude the pump cover blank into a pump cover semi-finished product and a pump cover part in sequence. The second extrusion assembly, in conjunction with the hoop pushing robot, adds multiple outer hoop members to the outside of the pump cover part. The first extrusion assembly includes a second base plate, a first horizontal push rod, a first scissor telescopic frame, a first channel plate, a first lead screw motor, a first lead screw, a first movable support plate, an inner extrusion mechanism, and an inner pressure bearing mechanism. The first horizontal push rod and the first scissor telescopic frame are installed between the second base plate and the first channel plate. The first lead screw motor is installed on the outside of the first channel plate. The output end of the first lead screw motor is connected to the first lead screw. The first lead screw has two lead screw segments with opposite rotation directions. A first movable support plate is sleeved on the outside of each lead screw segment. The inner extrusion mechanism and the inner pressure bearing mechanism are respectively installed on the outer ends of the two first movable support plates. The inner extrusion mechanism includes a first channel mounting frame, a first extrusion push rod, a first horizontal ... The first extrusion assembly comprises a rod, a first coupling, a first slide rod, a first mounting plate, an extrusion block, and a first sliding sleeve. A first extrusion push rod is mounted on one side plate of the first grooved 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 with an extrusion block via the first mounting plate. A first sliding sleeve, fitted onto the outside of the first slide rod, is embedded in the other side plate of the first grooved mounting frame. The second extrusion assembly includes a third base plate, a second horizontal push rod, a second scissor telescopic frame, a second grooved plate, a second lead screw motor, a second lead screw, a second movable support plate, an external pressure bearing mechanism, and an external extrusion mechanism. A second horizontal push rod and a second scissor telescopic frame are installed between the third base plate and the second grooved plate. A second lead screw motor is mounted on the outside of the second grooved plate. The output end of the second lead screw motor is connected to a second lead screw. The second lead screw has two lead screw segments with opposite rotation directions. A second movable support plate is fitted onto the outside of each lead screw segment. An external pressure bearing mechanism and an external extrusion mechanism are respectively installed on the outer ends of the two second movable support plates. The inner support feeding assembly is located on the left side of the second station and is used to install an inner support inside the pump cover component that has been moved 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. The narrow end of the conical cylinder is provided with a round end plate, and the round end plate is provided with several water inlet grooves. 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 several slots circumferentially inward. The annular end plate is provided with an external mounting hole through the slots. The pump cover semi-finished product has several rings of outwardly protruding pressure-resistant convex tubes formed on the conical cylinder of the pump cover blank. The pump cover component has limiting grooves formed inwardly on both sides of the pressure-resistant convex tubes of the pump cover semi-finished product to facilitate clamping the outer hoop component.

3. The automated production line for assembling a multi-stage centrifugal pump cover according to claim 2, characterized in that, The inner support component consists of an inner support plate, tensile strips, and a clamping plate. The specifications of the inner support plate are matched with those of the round end plate. The inner support plate has several filter holes. Several tensile strips are installed circumferentially along the outer edge of the inner support plate. Several protrusions that can be inserted into the anti-compression protrusions are provided on the outer side of the tensile strips. The outer end of the tensile strips is provided with a clamping plate that matches the clamping groove. The clamping plate has an inner mounting hole that matches the position of the outer mounting hole.

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 the hoop bar has several hollow holes at equal intervals.

5. The automated production line for assembling a multi-stage centrifugal pump cover according to claim 4, characterized in that, The internal pressure-bearing mechanism includes a second groove-shaped mounting bracket, a first pressure-bearing push rod, a first rotary joint, a second slide rod, a second mounting plate, a pressure-bearing block, a first tilting motor, and a first belt drive component. The first pressure-bearing push rod is mounted on one side plate of the second groove-shaped mounting bracket. 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 mounted on the second mounting plate with a pressure-bearing block. The first tilting motor is mounted on the second groove-shaped mounting bracket. The output shaft of the first tilting motor is connected to the second slide rod via the first belt drive component.

6. The automated production line for assembling a multi-stage centrifugal pump cover according to claim 5, characterized in that, The external pressure-bearing mechanism includes a third groove-shaped mounting frame, a second pressure-bearing push rod, a second rotary joint, a third slide rod, a third mounting plate, a pressure-bearing sleeve, a bending pressure roller, a second tilting motor, and a second belt drive component. The second pressure-bearing push rod is mounted on one side plate of the third groove-shaped mounting frame. The movable end of the second pressure-bearing push rod is connected to one end of the third slide rod via the second rotary joint. The other end of the third slide rod is mounted with a pressure-bearing sleeve and a bending pressure roller via the third mounting plate. The second tilting motor is mounted on the third groove-shaped mounting frame. The output shaft of the second tilting motor is connected to the third slide rod via the second belt drive component. The external extrusion mechanism includes a fourth groove-shaped mounting bracket, a second extrusion push rod, a second coupling, a fourth slide rod, a second sliding sleeve, a fourth mounting plate, mechanical grippers, and extrusion wheels. The second extrusion push rod is mounted on one side plate of the fourth groove-shaped mounting bracket. The movable end of the second extrusion push rod is connected to one end of the fourth slide rod via the coupling. The mechanical gripper is mounted on the other end of the fourth slide rod via the fourth mounting plate. The second sliding sleeve, which is sleeved on the outside of the fourth slide rod, is embedded in the other side plate of the fourth groove-shaped mounting bracket. The extrusion wheels are mounted on the two relatively displaced grippers of the mechanical gripper.

7. The automated production line for assembling a multi-stage centrifugal pump cover according to claim 6, characterized in that, The inner support feeding assembly includes a fourth base plate, a third horizontal push rod, a third scissor telescopic frame, and a clamping mechanism. The third horizontal push rod and the third scissor telescopic frame are installed between the fourth base plate and the clamping mechanism. The clamping mechanism includes a circular box, a second rotary driver, a turntable, and a clamping component. The second rotary driver is installed inside the circular box, and the turntable is installed at the movable end of the second rotary driver. The clamping component consists of a clamping head and a second positioning rod fixed thereto. The outer side plate of the circular box has multiple radial grooves along the circumference to facilitate the radial displacement of the tensile strip plate and the clamping plate in the inner support. The specifications of the second positioning rod are matched with the specifications of the mounting inner hole. The outer side of the turntable has multiple arc-shaped grooves along the circumference to match the clamping head in the clamping component.

8. The automated production line for assembling a multi-stage centrifugal pump cover according to claim 7, characterized in that, It also includes a controller, which is connected to the lifting and flipping assembly, the first extrusion assembly, the second extrusion assembly, the hoop pushing robot, and the inner support feeding assembly.

9. An automated production line for assembling a multi-stage centrifugal pump cover according to claim 8, characterized in that, Its production and assembly method includes the following steps: S1. The pump cover blank is adsorbed by the lifting and flipping assembly and placed in the first working position. The pump cover blank is rotated circumferentially by the mutual approach of the extrusion block in the first extrusion assembly and the pressure-bearing sleeve in the second extrusion assembly, and the pump cover blank is gradually extruded and formed on the conical cylinder of the pump cover blank to obtain a pump cover semi-finished product. The pump cover semi-finished product is rotated circumferentially by the mutual approach of the pressure-bearing block in the first extrusion assembly and the extrusion wheel in the second extrusion assembly, and the pump cover semi-finished product is extruded and formed inward on both sides of the pressure-bearing convex tube of the pump cover semi-finished product to obtain a pump cover part. S2. The hoop is pushed between two opposite limiting grooves by the hoop pushing robot arm. The hoop is bent by the bending pressure roller in the second extrusion assembly. The pump cover semi-finished product is rotated circumferentially by the lifting and flipping assembly to add multiple outer hoop pieces to the outside of the pump cover. S3. Using the lifting and tilting assembly, the pump cover is moved downward from the first station to the second station, and the inner support is installed on the inside of the pump cover using the inner support feeding assembly.

Images