A multi-stage centrifugal pump cover automatic punching system and method

Abstract

The present invention belongs to the technical field of multi-stage centrifugal pump production, and specifically relates to an automatic punching system and method for a multi-stage centrifugal pump cover. The various components of the present invention cooperate with each other, and a clamping component is used to clamp the pump cover body, and drive it to perform horizontal circumferential rotation and rotation around its own axis; a grooving component is used to punch an H-shaped groove on the pump cover body along a cylindrical spiral line; an inner spiral support body and an outer spiral support body are respectively delivered to preset positions on the inner and outer sides of the pump cover body by a support body feeding component; a locking component is used to bend the protruding pieces surrounded by the H-shaped groove inwardly or outwardly in an alternating manner, thereby forming an inner locking piece for locking the inner spiral support body and an outer locking piece for locking the outer spiral support body; in this way, the automatic punching and assembly requirements of the reinforced pump cover are met, the connection between the pump cover body and the inner and outer spiral supports is highly reliable, and no additional cumbersome processes are required to achieve the connection, thereby reducing manufacturing costs.

Description

Technical Field

[0001] The present invention belongs to the technical field of multi-stage centrifugal pump production, and in particular relates to an automatic punching system and method for a multi-stage centrifugal pump cover. 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 level impeller through the flow channel of the guide casing. It is based on this principle. 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 pump covers have relatively thin bodies. This reduces material usage, lowering pump weight and production costs while also facilitating transportation and installation. However, thinner covers are prone to deformation or cracking under high-pressure conditions, potentially causing leakage or vibration, affecting the pump's sealing and operational stability. To address this, our company has designed a reinforced pump cover for multi-stage centrifugal pumps. This design significantly enhances the overall structural strength of the cover by adding inner and outer spiral supports to the inner and outer sides of the cover.

[0004] During the manufacturing process of the aforementioned reinforced pump cover, an automated punching system is required for punching and assembly. However, conventional pump cover punching systems have shortcomings. First, they cannot meet the automated punching and assembly requirements of reinforced pump covers. Second, they cannot simultaneously form locking tabs with different orientations during the formation of the pump cover's inlet hole to achieve a reliable connection with the inner and outer spiral supports. This results in additional, cumbersome steps to achieve the connection, increasing manufacturing costs. Therefore, it is necessary to optimize and improve conventional pump cover punching systems. 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 a multi-stage centrifugal pump cover automatic punching system and method.

[0006] In order to achieve the above technical objectives and the above technical effects, the present invention is implemented through the following technical solutions:

[0007] The present invention provides an automatic punching system for a multi-stage centrifugal pump cover, comprising:

[0008] A clamping assembly, wherein the clamping assembly is provided with loading and unloading stations, a notching station, a support body feeding station and a locking station in sequence along the horizontal circumferential direction; the clamping assembly is used to clamp the pump cover body and can drive it to perform horizontal circumferential rotation and rotation around its own axis;

[0009] A notching assembly, which is located near the notching station and is used to punch a plurality of H-shaped grooves along a cylindrical spiral line on the pump cover body;

[0010] A support body feeding assembly is provided near the support body feeding station and is used to deliver the inner spiral support body and the outer spiral support body to the preset positions inside and outside the pump cover body respectively;

[0011] The locking assembly is arranged near the locking station and is used to bend the protrusions surrounded by the H-shaped grooves in the pump cover body in an alternating manner inward or outward. Bending inward can form an inner locking piece for locking the inner spiral support body, and bending outward can form an outer locking piece for locking the outer spiral support body.

[0012] Furthermore, in the above-mentioned multi-stage centrifugal pump cover automatic punching system, the reinforced pump cover is composed of the pump cover body, the inner spiral support body, and the outer spiral support body that are locked and assembled together; the convex piece surrounded by the H-shaped groove of the pump cover body is bent to form an intermediate liquid inlet hole, and a number of inner liquid inlet holes are equidistantly provided on the inner spiral support body, and a number of outer liquid inlet holes are equidistantly provided on the outer spiral support body. The positions of the intermediate liquid inlet hole, the inner liquid inlet hole and the outer liquid inlet hole correspond to each other one by one, and together constitute a liquid inlet channel.

[0013] Furthermore, in the above-mentioned automatic punching system for the pump cover of the multi-stage centrifugal pump, the specifications of the middle liquid inlet hole, the inner liquid inlet hole and the outer liquid inlet hole are the same, and the liquid inlet channel is a channel of equal width; or the specification of the middle liquid inlet hole is smaller than the specifications of the inner liquid inlet hole and the outer liquid inlet hole, and the liquid inlet channel is a variable width channel that is narrow in the middle and wide at the top and bottom.

[0014] Furthermore, in the above-mentioned multi-stage centrifugal pump cover automated punching system, the clamping assembly includes a base plate, a first motor, a turntable, a mounting seat, a second motor, an umbrella-shaped steering gear set, a transverse shaft and a multi-claw clamper. The first motor is installed on the upper side of the base plate, and the output end of the first motor is supported by a mounting seat via a turntable. A plurality of second motors are circumferentially installed on the upper side of the mounting seat, and the output shaft of each second motor is transmission-connected to one end of the transverse shaft through an umbrella-shaped steering gear set. The other end of the transverse shaft is installed with a multi-claw clamper for clamping the pump cover body.

[0015] Furthermore, in the above-mentioned multi-stage centrifugal pump cover automatic punching system, the notching assembly includes a first side base plate, a first horizontal push rod, a first vertical plate, a first horizontal plate, a notching push rod, an H-shaped notching knife and a pressure block, the first side base plate is installed with a first horizontal push rod, the movable end of the first horizontal push rod is installed with a first vertical plate, the outer side of the first vertical plate is installed with a first horizontal plate and a pressure block located below it, the notching push rod is installed with a first vertical plate, the movable end of the notching push rod is installed with an H-shaped notching knife, and the upper side of the pressure block is provided with an avoidance groove that cooperates with the H-shaped notching knife.

[0016] Furthermore, in the above-mentioned multi-stage centrifugal pump cover automatic punching system, the support body feeding assembly includes a second side base plate, a second horizontal push rod, a second vertical plate, an inner support plate, an outer support plate and a support plate driving mechanism, a second horizontal push rod is installed on the second side base plate, a second vertical plate is installed on the movable end of the second horizontal push rod, multiple groups of inner support plates and outer support plates are installed circumferentially on the outer side of the second vertical plate, a support plate driving mechanism for driving the inner support plates and outer support plates in the same group to flip relative to each other is installed on the second vertical plate, a first positioning groove cooperating with the inner spiral support body is provided on the outer side of the inner support plate, and a second positioning groove cooperating with the outer spiral support body is provided on the inner side of the outer support plate.

[0017] Furthermore, in the above-mentioned multi-stage centrifugal pump cover automatic punching system, the support plate drive mechanism includes a third motor, a face gear, a radial shaft, a bevel gear, a pressure block and a return spring, the third motor is mounted on the second vertical plate, the output end of the third motor is mounted with a face gear, one end of the radial shaft is mounted with a bevel gear that cooperates with the face gear, the radial shaft is provided with two screw segments with opposite rotation directions, the inner support plate and the outer support plate intersect each other near the inner end portion and a locating pin is installed at the intersection, the inner ends of the inner support plate and the outer support plate are provided with a through hole for facilitating the passage of the radial shaft, the pressure block is provided with a screw groove that cooperates with the corresponding screw segment, the pressure block is provided with two and respectively abuts against the outer side of the inner end portion of the inner support plate and the outer support plate, the radial shaft is located between the inner ends of the inner support plate and the outer support plate and is sleeved with a return spring; the second vertical plate is provided with an active cavity that facilitates the movement of the face gear and the bevel gear, and a radial groove that facilitates the relative flipping of the two support plates and the radial displacement of the pressure block, the inner end of the radial groove is connected to the active cavity through the shaft groove.

[0018] Furthermore, in the above-mentioned automatic punching system for the pump cover of the multi-stage centrifugal pump, the locking assembly includes a third side base plate, a third horizontal push rod, a rotary drive, a third vertical plate, a second cross plate, a bending push rod, a bending punch, a screw motor, a screw, a movable cross plate and a mechanical internal support clamp, the third horizontal push rod is installed on the third side base plate, the movable end of the third horizontal push rod is installed with a rotary drive, the third vertical plate is installed on the outer side of the movable ring of the rotary drive, the second cross plate is fixed with the bending push rod, the second cross plate is fixed with the bending push rod, the output end of the screw motor is installed with a screw, the outer side of the screw rod is sleeved with a movable cross plate matching it, one end of the movable cross plate is slidably restricted on the third vertical plate, and the other end of the movable cross plate is located at a position opposite to the bending punch and is installed with a mechanical internal support clamp.

[0019] Furthermore, the above-mentioned multi-stage centrifugal pump cover automatic punching system also includes a controller and a loading and unloading robot. The loading and unloading robot is arranged close to the loading and unloading station to realize the loading operation of the pump cover body and the unloading operation of the reinforced pump cover; the controller is respectively connected to the clamping assembly, the punching assembly, the support body feeding assembly, the locking assembly and the loading and unloading robot.

[0020] The present invention also provides a method for automatically punching a multi-stage centrifugal pump cover, which is implemented based on the above-mentioned automatic punching system for a multi-stage centrifugal pump cover and includes the following steps:

[0021] S1. Use the loading and unloading manipulator to send the pump cover body to the loading and unloading station of the clamping assembly;

[0022] S2. Clamp the pump cover body with a clamping assembly and drive it to rotate from the loading and unloading station to the notching station. Use the notching assembly to punch an H-shaped groove along the cylindrical spiral line on the pump cover body.

[0023] S3. Use the clamping assembly to drive the pump cover body to rotate from the notching station to the support body feeding station, and use the support body feeding assembly to deliver the inner spiral support body and the outer spiral support body to the preset positions inside and outside the pump cover body respectively;

[0024] S4. Using the clamping assembly, the pump cover body, the inner spiral support body, and the outer spiral support body are rotated from the support body feeding station to the locking station. The locking assembly is used to alternately bend the protruding pieces formed by the H-shaped grooves in the pump cover body inward or outward. The protruding pieces formed by the H-shaped grooves in the pump cover body are bent inward to form inner locking pieces for locking the inner spiral support body, and the protruding pieces formed by the H-shaped grooves in the pump cover body are bent outward to form outer locking pieces for locking the outer spiral support body. Finally, a reinforced pump cover is obtained.

[0025] S5. Use the clamping assembly to drive the reinforced pump cover to rotate from the locking station to the loading and unloading station, and use the loading and unloading robot to remove the reinforced pump cover from the loading and unloading station.

[0026] The beneficial effects of the present invention are:

[0027] 1. The present invention provides an automatic punching system for a multi-stage centrifugal pump cover, which is mainly composed of a clamping assembly, a grooving assembly, a support body feeding assembly and a locking assembly. The various components cooperate with each other, and the clamping assembly is used to clamp the pump cover body and drive it to perform horizontal circumferential rotation and rotation around its own axis; the grooving assembly is used to stamp an H-shaped groove on the pump cover body along a cylindrical spiral line; the support body feeding assembly is used to deliver the inner spiral support body and the outer spiral support body to the preset positions inside and outside the pump cover body respectively; the locking assembly is used to bend the protruding pieces surrounded by the H-shaped grooves in the pump cover body in an alternating manner inwardly or outwardly, thereby forming an inner locking piece for locking the inner spiral support body and an outer locking piece for locking the outer spiral support body; in this way, the automatic punching and assembly requirements of the reinforced pump cover are met, the connection between the pump cover body and the inner and outer spiral supports is highly reliable, no additional cumbersome processes are required to achieve the connection, and the manufacturing cost is reduced.

[0028] 2. The reinforced pump cover prepared by the present invention is composed of a pump cover body, an inner spiral support body, and an outer spiral support body that are locked and assembled together. The inner spiral support body and the outer spiral support body are used to greatly improve the overall structural strength of the pump cover. At the same time, the introduction of the inner spiral support body and the outer spiral support body also increases the length of the liquid inlet channel. According to needs, the liquid inlet channel can be designed as a variable slot width channel that is narrow in the middle and wide at the top and bottom. The narrow middle section forms a Venturi effect through cross-sectional contraction, which can accelerate fluid flow (flow rate increased by 15% to 20%) and enhance the kinetic energy input efficiency of the impeller inlet; the upper and lower wide areas buffer the flow rate mutation by expanding the cross-sectional area, reduce local turbulence intensity, and reduce the risk of cavitation.

[0029] 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

[0030] 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.

[0031] Figure 1 It is a schematic structural diagram of the present invention as a whole;

[0032] Figure 2 It is a structural schematic diagram of the reinforced pump cover of the present invention;

[0033] Figure 3 A half-section schematic diagram of the reinforced pump cover of the present invention;

[0034] Figure 4 This is a schematic diagram of the structure of the pump cover body after processing in the present invention;

[0035] Figure 5 Schematic diagram of the structure of the inner and outer spiral supports in the present invention;

[0036] Figure 6 Schematic diagram of the forming principle of the inner and outer locking pieces in the present invention;

[0037] Figure 7 It is a structural schematic diagram of the clamping assembly in the present invention;

[0038] Figure 8 Schematic diagram of the structure of the notch punching assembly in the present invention;

[0039] Figure 9 It is a structural schematic diagram of the support body feeding assembly in the present invention;

[0040] Figure 10 This is a schematic front view of the support feeding assembly of the present invention;

[0041] Figure 11 Schematic diagram of the structure of the support plate driving mechanism of the present invention;

[0042] Figure 12 It is a structural diagram of the support plate driving mechanism part of the present invention;

[0043] Figure 13 Schematic diagram of the structure of the second vertical plate in the present invention;

[0044] Figure 14 Schematic diagram of the structure of the locking assembly of the present invention;

[0045] Figure 15 A connection diagram of the main components of the present invention;

[0046] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0047] 1- clamping assembly, 101- base plate, 102- first motor, 103- turntable, 104- mounting base, 105- second motor, 106- horizontal axis, 107- multi-claw clamp;

[0048] 2-notching assembly, 201-first side base plate, 202-first horizontal push rod, 203-first vertical plate, 204-first horizontal plate, 205-notching push rod, 206-H-shaped notching knife, 207-pressure block, 208-avoidance groove;

[0049] 3-support body feeding assembly, 301-second side base plate, 302-second horizontal push rod, 303-second vertical plate, 304-inner support plate, 305-outer support plate, 306-third motor, 307-face gear, 308-radial shaft, 309-conical gear, 310-pressing block, 311-return spring, 312-first positioning groove, 313-second positioning groove, 314-radial groove, 315-through-shaft groove;

[0050] 4-locking assembly, 401-third side base plate, 402-third horizontal push rod, 403-rotation drive, 404-third vertical plate, 405-second horizontal plate, 406-bending push rod, 407-bending punch, 408-screw motor, 409-screw, 410-movable horizontal plate, 411-mechanical inner support clamp;

[0051] 5-reinforced pump cover, 51-pump cover body, 511-middle liquid inlet hole, 512-inner locking plate, 513-outer locking plate, 514-H-shaped groove, 52-inner spiral support body, 521-inner liquid inlet hole, 53-outer spiral support body, 531-outer liquid inlet hole;

[0052] 6-Controller;

[0053] 7- Loading and unloading robot. DETAILED DESCRIPTION

[0054] 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.

[0055] like Figures 1-6As shown, this embodiment provides an automated punching system for a multi-stage centrifugal pump cover, comprising a clamping assembly 1, a notching assembly 2, a support body feeding assembly 3 and a locking assembly 4. The clamping assembly 1 is provided with loading and unloading stations, a notching station, a support body feeding station and a locking station in sequence along the horizontal circumference. The clamping assembly 1 is used to clamp the pump cover body 51, and can drive it to perform horizontal circumferential rotation and rotation around its own axis. The notching assembly 2 is arranged near the notching station, and is used to punch a number of H-shaped grooves 514 along a cylindrical spiral line on the pump cover body 51. The support body feeding assembly 3 is arranged near the support body feeding station, and is used to convey the inner spiral support body 52 and the outer spiral support body 53 to the preset positions on the inner and outer sides of the pump cover body 51 respectively. The locking assembly 4 is located near the locking station and is used to alternately bend the protruding pieces formed by the H-shaped groove 514 in the pump cover body 51 inward or outward. Bending inward can form an inner locking piece 512 for locking the inner spiral support body 52, while bending outward can form an outer locking piece 513 for locking the outer spiral support body 53. The inner locking piece 512 and the outer locking piece 513 are L-shaped.

[0056] In this embodiment, the reinforced pump cover 5 is assembled by locking the pump cover body 51, the inner spiral support 52, and the outer spiral support 53. The H-shaped groove 514 of the pump cover body 51 forms a bent tab to form a central liquid inlet 511. The inner spiral support 52 is provided with a plurality of equally spaced inner liquid inlet holes 521, and the outer spiral support 53 is provided with a plurality of equally spaced outer liquid inlet holes 531. The positions of the central liquid inlet holes 511, the inner liquid inlet holes 521, and the outer liquid inlet holes 531 correspond to each other and together form a liquid inlet channel.

[0057] In this embodiment, the specifications of the middle liquid inlet hole 511, the inner liquid inlet hole 521, and the outer liquid inlet hole 531 are the same, and the liquid inlet channel is a channel of uniform width. Alternatively, the specifications of the middle liquid inlet hole 511 are smaller than those of the inner liquid inlet hole 521 and the outer liquid inlet hole 531, and the liquid inlet channel is a channel of variable width, narrow in the middle and wide at the top and bottom. The narrow middle section creates a Venturi effect through cross-sectional contraction, which accelerates fluid flow (increasing flow rate by 15% to 20%) and enhances the kinetic energy input efficiency at the impeller inlet. The wide upper and lower sections buffer sudden changes in flow rate by increasing cross-sectional area, reducing local turbulence intensity and minimizing the risk of cavitation.

[0058] like Figure 7As shown, the clamping assembly 1 includes a base plate 101, a first motor 102, a turntable 103, a mounting seat 104, a second motor 105, an umbrella-shaped steering gear set, a transverse shaft 106 and a multi-claw clamp 107. The first motor 102 is mounted on the upper side of the base plate 101, and the output end of the first motor 102 is supported on the mounting seat 104 via the turntable 103. A plurality of second motors 105 are circumferentially mounted on the upper side of the mounting seat 104, and the output shaft of each second motor 105 is transmission-connected to one end of the transverse shaft 106 through the umbrella-shaped steering gear set, and the other end of the transverse shaft 106 is mounted with a multi-claw clamp 107 for clamping the pump cover body 51. The mounting seat 104 is provided with an active area that facilitates the movement of the umbrella-shaped steering gear set, the transverse shaft 106 and the multi-claw clamp 107.

[0059] In this embodiment, in order to ensure the smooth rotation of the turntable 103, a straightening and stabilizing mechanism can be added between the turntable 103 and the base plate 101. The straightening and stabilizing mechanism consists of a lower pipe sleeve and an upper sliding pipe. The lower pipe sleeve is provided with an annular cavity that cooperates with the upper sliding pipe.

[0060] In this embodiment, the multi-jaw gripper 107 is provided with multiple gripping claws along the circumference that can be displaced synchronously inward or outward. Curved rubber pads are provided on the inner sides of the gripping claws to prevent crushing. To further enhance the gripping effect of the multi-jaw gripper 107, a vacuum suction cup can be added to the center of the outer side of the multi-jaw gripper 107 to absorb the end cap of the pump cover body 51.

[0061] The clamping assembly 1 operates as follows: a first motor 102 drives the multi-claw gripper through a turntable 103 and a mounting base 104 to rotate horizontally, thereby causing the pump cover body 51 to rotate horizontally and circumferentially, meeting the requirements for station switching. A second motor 105, an umbrella-shaped steering gear set, and a transverse shaft 106 form a flipping mechanism to drive the multi-claw gripper to flip, thereby allowing the pump cover body 51 to flip around its own axis.

[0062] like Figure 8 As shown, the notching assembly 2 includes a first side base plate 201, a first horizontal push rod 202, a first vertical plate 203, a first transverse plate 204, a notching push rod 205, an H-shaped notching blade 206, and a pressure block 207. The first side base plate 201 is mounted with the first horizontal push rod 202, the movable end of which is mounted with the first vertical plate 203, the outer side of the first vertical plate 203 is mounted with the first transverse plate 204 and the pressure block 207 located below it, the notching push rod 205 is mounted on the first vertical plate 203, the movable end of the notching push rod 205 is mounted with the H-shaped notching blade 206, and the upper side of the pressure block 207 is provided with an avoidance groove 208 that cooperates with the H-shaped notching blade 206. The upper side of the pressure block 207 is an arcuate surface that matches the shape of the inner wall of the pump cover body 51.

[0063] The working principle of the notching assembly 2 is: the notching push rod 205 is used to drive the H-shaped notching knife 206 to move downward, and then punch out an H-shaped groove 514 on the pump cover body 51, and the pressure block 207 is used to provide support for the inner wall of the pump cover body 51; each time a punching is completed, the H-shaped notching knife 206 is reset, and the first horizontal push rod 202 is used to drive the H-shaped notching knife 206 and the pressure block 207 to adjust the axial position. The pump cover body 51 is driven by the clamping assembly 1 to flip around its own axis at a certain angle. In this way, the need to continuously punch out the H-shaped groove 514 along the cylindrical spiral line on the pump cover body 51 is met.

[0064] like Figure 9 and Figure 10 As shown, the support feeding assembly 3 includes a second side base plate 301, a second horizontal push rod 302, a second vertical plate 303, an inner support plate 304, an outer support plate 305, and a support plate driving mechanism. The second side base plate 301 is mounted with the second horizontal push rod 302, the movable end of which is mounted with the second vertical plate 303. Multiple groups of inner support plates 304 and outer support plates 305 are circumferentially mounted on the outer sides of the second vertical plates 303. The second vertical plates 303 are mounted with a support plate driving mechanism for driving the inner support plates 304 and outer support plates 305 in the same group to rotate relative to each other. The outer side of the inner support plate 304 is provided with a first positioning groove 312 that cooperates with the inner spiral support body 52, and the inner side of the outer support plate 305 is provided with a second positioning groove 313 that cooperates with the outer spiral support body 53.

[0065] like Figure 11 and Figure 12 As shown, the support plate drive mechanism includes a third motor 306, a face gear 307, a radial shaft 308, a bevel gear 309, a pressure block 310, and a return spring 311. The third motor 306 is mounted on the second riser 303. The face gear 307 is mounted on the output end of the third motor 306. A bevel gear 309 is mounted on one end of the radial shaft 308, which mates with the face gear 307. The radial shaft 308 is equipped with two screw rod sections with opposite rotation directions. The inner and outer support plates 304 and 305 intersect near their inner ends, and a positioning pin is installed at the intersection to provide positioning for relative rotation (i.e., a conventional scissor-type connection structure). The inner ends of the inner support plate 304 and the outer support plate 305 are provided with through holes for the radial shaft 308 to pass through, and the pressure block 310 is provided with a screw groove that cooperates with the corresponding screw segment. There are two pressure blocks 310 in total, which are respectively against the outer sides of the inner ends of the inner support plate 304 and the outer support plate 305. The radial shaft 308 is located between the inner ends of the inner support plate 304 and the outer support plate 305, and the shaft body is provided with a return spring 311.

[0066] like Figure 13As shown, the second vertical plate 303 is provided with an active cavity for facilitating the movement of the face gear 307 and the bevel gear 309 , and a radial groove 314 for facilitating the relative flipping of the two support plates and the radial displacement of the pressure block 310 . The inner end of the radial groove 314 is connected to the active cavity through the shaft groove 315 .

[0067] The working principle of the support body feeding assembly 3: the inner support plate 304 and the outer support plate 305 are used to clamp the inner spiral support body 52 and the outer spiral support body 53 respectively, and the second horizontal push rod 302 is used to drive the inner support plate 304, the outer support plate 305 and the inner spiral support body 52 and the outer spiral support body 53 clamped therein to move toward the pump cover body 51 respectively, and finally the inner spiral support body 52 and the outer spiral support body 53 reach the preset positions on the inner and outer sides of the pump cover body 51, and the inner support plate 304 and the outer support plate 305 are released from the locking of the inner spiral support body 52 and the outer spiral support body 53 by the support plate driving mechanism, and the friction resistance between the inner spiral support body 52, the outer spiral support body 53 and the pump cover body 51 is relied upon to achieve the initial fixation of the three, and then the second horizontal push rod 302 is used to separate the inner support plate 304 and the outer support plate 305 from the pump cover body 51, thus completing the feeding of the support body.

[0068] like Figure 14 As shown, the locking assembly 4 includes a third side base plate 401, a third horizontal push rod 402, a rotary driver 403, a third vertical plate 404, a second transverse plate 405, a bending push rod 406, a bending punch 407, a lead screw motor 408, a lead screw 409, a movable transverse plate 410, and a mechanical inner support jaw 411. The third side base plate 401 is mounted with the third horizontal push rod 402, the movable end of the third horizontal push rod 402 is mounted with the rotary driver 403, and the third vertical plate 404 is mounted outside the movable ring of the rotary driver 403. The second horizontal plate 405 and the screw motor 408 are fixed to the outer side of the third vertical plate 404, the bending push rod 406 is fixed on the second horizontal plate 405, the movable end of the bending push rod 406 is installed with a bending punch 407, the output end of the screw motor 408 is installed with a screw 409, and the outer side of the screw 409 is sleeved with a movable horizontal plate 410 that cooperates with it. One end of the movable horizontal plate 410 is slidably restricted on the third vertical plate 404, and the other end of the movable horizontal plate 410 is located at a position opposite to the bending punch 407 and is installed with a mechanical internal support clamp 411.

[0069] The working principle of the locking assembly 4 is as follows: when it is necessary to lock the inner spiral support 52 with the pump cover body 51, the bending push rod 406 is used to drive the bending punch 407 to move downward, and the bending punch 407 squeezes the convex piece surrounded by the H-shaped groove 514 in the pump cover body 51, causing it to bend inward to form two opposite bending vertical plate parts. The bending push rod 406 drives the bending punch 407 to reset. At this time, the lifting mechanism composed of the screw motor 408, the screw 409, and the movable horizontal plate 410 is The mechanical inner support clamp 411 is driven to move upward, and the inner support clamps on both sides of the mechanical inner support clamp 411 are displaced to the area between the two bent vertical plates, and then the two inner support clamps are displaced outward, squeezing the bent vertical plates to bend outward again. During the bending process, the lifting mechanism composed of the screw motor 408, the screw 409, and the movable horizontal plate 410 drives the mechanical inner support clamp 411 to continue to move slowly upward until the two bent vertical plates form an inner locking piece 512 that can lock the inner spiral support body 52. After each set of inner locking pieces 512 is formed, the third horizontal push rod 402 is used to drive the bending punch 407 and the mechanical inner support clamp 411 to adjust the axial position. The pump cover body 51 is rotated around its own axis by a certain angle under the drive of the clamping assembly 1. In this way, the inner locking pieces 512 are formed and processed at intervals along the cylindrical spiral line on the pump cover body 51 to lock the inner spiral support body 52. Similarly, when it is necessary to lock the outer spiral support body 53 with the pump cover body 51, it is only necessary to use the rotary drive 403 to switch the inner and outer positions of the bending punch 407 and the mechanical inner support clamp 411, and refer to the forming processing principle of the inner locking plate 512 to meet the requirement of forming the outer locking plate 513 along the cylindrical spiral line on the pump cover body 51 to lock the outer spiral support body 53.

[0070] like Figure 15 As shown, the system further includes a controller 6 and a loading and unloading robot 7. The loading and unloading robot 7 is located near the loading and unloading station and is used to load the pump cover body 51 and unload the reinforced pump cover 5. The controller 6 is connected to the clamping assembly 1, the notching assembly 2, the support body feeding assembly 3, the locking assembly 4, and the loading and unloading robot 7 respectively.

[0071] This embodiment also provides a method for automatically punching a multi-stage centrifugal pump cover, which is implemented based on the above-mentioned automatic punching system for a multi-stage centrifugal pump cover and includes the following steps:

[0072] S1. Use the loading and unloading robot 7 to send the pump cover body into the loading and unloading station of the clamping component 1.

[0073] S2. Use the clamping assembly 1 to clamp the pump cover body 51 and drive it to rotate from the loading and unloading station to the notching station, and use the notching assembly 2 to punch an H-shaped groove along the cylindrical spiral line on the pump cover body 51.

[0074] S3. Use the clamping assembly 1 to drive the pump cover body 51 to rotate from the notching station to the support body feeding station, and use the support body feeding assembly 3 to transport the inner spiral support body 52 and the outer spiral support body 53 to the preset positions inside and outside the pump cover body 51 respectively.

[0075] S4. Use the clamping assembly 1 to drive the pump cover body 51, the inner spiral support body 52, and the outer spiral support body 53 to rotate from the support body feeding station to the locking station, and use the locking assembly 4 to bend the protrusions surrounded by the H-shaped groove 514 in the pump cover body 51 alternately inward or outward. Bending inward forms an inner locking piece 512 for locking the inner spiral support body 52, and bending outward forms an outer locking piece 513 for locking the outer spiral support body 53; finally, a reinforced pump cover 5 is obtained.

[0076] S5. Use the clamping assembly 1 to drive the reinforced pump cover 5 to rotate from the locking station to the loading and unloading station, and use the loading and unloading manipulator 7 to remove the reinforced pump cover 5 from the loading and unloading station.

[0077] The specific application of this embodiment is: a multi-stage centrifugal pump cover automatic punching system is mainly composed of a clamping component 1, a slotting component 2, a support body feeding component 3 and a locking component 4. The components cooperate with each other, and the clamping component 1 is used to clamp the pump cover body 51 and drive it to perform horizontal circumferential rotation and rotation around its own axis; the slotting component 2 is used to punch an H-shaped groove 514 along a cylindrical spiral line on the pump cover body 51; the support body feeding component 3 is used to deliver the inner spiral support body 52 and the outer spiral support body 53 to the pump cover body respectively. The pump cover body 51 is preset at the inner and outer sides; the protrusions surrounded by the H-shaped grooves 514 in the pump cover body 51 are bent inward or outward in an alternating manner by the locking assembly 4, thereby forming an inner locking piece 512 for locking the inner spiral support body 52 and an outer locking piece 513 for locking the outer spiral support body 53; in this way, the automated punching and assembly requirements of the reinforced pump cover are met, and the connection between the pump cover body 51 and the inner and outer spiral support bodies 52, 53 is more reliable, and no additional cumbersome process is required to achieve the connection, thereby reducing the manufacturing cost.

[0078] The prepared reinforced pump cover is composed of a pump cover body 51, an inner spiral support body 52, and an outer spiral support body 53 that are locked together. The inner spiral support body 52 and the outer spiral support body 53 are used to greatly improve the overall structural strength of the pump cover. At the same time, the introduction of the inner spiral support body 52 and the outer spiral support body 53 also increases the length of the liquid inlet channel. According to needs, the liquid inlet channel can be designed as a variable slot width channel that is narrow in the middle and wide at the top and bottom. The narrow middle section forms a Venturi effect through cross-sectional contraction, which can accelerate fluid flow (flow rate increased by 15% to 20%) and enhance the kinetic energy input efficiency of the impeller inlet; the upper and lower wide areas buffer the flow velocity mutation by expanding the cross-sectional area, reduce local turbulence intensity, and reduce the risk of cavitation.

[0079] 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 automatic punching system for a multi-stage centrifugal pump cover, characterized in that: It includes a clamping assembly, a notching assembly, a support body feeding assembly and a locking assembly; The reinforced pump cover is composed of the pump cover body, the inner spiral support body, and the outer spiral support body, which are locked and assembled together; the convex piece surrounded by the H-shaped groove of the pump cover body is bent to form a middle liquid inlet hole, the inner spiral support body is provided with a plurality of inner liquid inlet holes at equal intervals, and the outer spiral support body is provided with a plurality of outer liquid inlet holes at equal intervals. The positions of the middle liquid inlet hole, the inner liquid inlet hole and the outer liquid inlet hole correspond to each other and together constitute a liquid inlet channel; the specifications of the middle liquid inlet hole, the inner liquid inlet hole and the outer liquid inlet hole are the same, and the liquid inlet channel is a channel of equal slot width; or the specification of the middle liquid inlet hole is smaller than that of the inner liquid inlet hole and the outer liquid inlet hole, and the liquid inlet channel is a variable slot width channel that is narrow in the middle and wide at the top and bottom; The clamping assembly is provided with loading and unloading stations, a notching station, a support body feeding station and a locking station in sequence along the horizontal circumferential direction; the clamping assembly is used to clamp the pump cover body and can drive it to perform horizontal circumferential rotation and rotation around its own axis; The notching assembly is arranged near the notching station and is used to punch a plurality of H-shaped grooves along the cylindrical spiral line on the pump cover body; The support body feeding assembly is arranged near the support body feeding station, and is used for conveying the inner spiral support body and the outer spiral support body to the preset positions inside and outside the pump cover body respectively; the support body feeding assembly comprises a second side base plate, a second horizontal push rod, a second vertical plate, an inner support plate, an outer support plate and a support plate driving mechanism; the second side base plate is installed with a second horizontal push rod, and the movable end of the second horizontal push rod is installed with a second vertical plate, and the outer side of the second vertical plate is circumferentially installed with multiple groups of inner support plates and outer support plates, and the second vertical plate is installed with a support plate driving mechanism for driving the inner support plates and outer support plates in the same group to flip relative to each other; the outer side of the inner support plate is provided with a first positioning groove that cooperates with the outer spiral support body, and the inner side of the outer support plate is provided with a second positioning groove that cooperates with the inner spiral support body; The locking assembly is arranged near the locking station, and is used to bend the protrusions surrounded by the H-shaped grooves in the pump cover body in an alternating manner inward or outward. Bending inward can form an inner locking piece for locking the inner spiral support body, and bending outward can form an outer locking piece for locking the outer spiral support body.

2. The multi-stage centrifugal pump cover automatic punching system according to claim 1 is characterized in that: The clamping assembly includes a base plate, a first motor, a turntable, a mounting seat, a second motor, an umbrella-shaped steering gear set, a transverse shaft and a multi-claw clamp. The first motor is installed on the upper side of the base plate, and the output end of the first motor is supported by a mounting seat via the turntable. A plurality of second motors are installed circumferentially on the upper side of the mounting seat. The output shaft of each second motor is transmission-connected to one end of the transverse shaft through the umbrella-shaped steering gear set, and the other end of the transverse shaft is installed with a multi-claw clamp for clamping the pump cover body.

3. The multi-stage centrifugal pump cover automatic punching system according to claim 2, characterized in that: The notching assembly includes a first side base plate, a first horizontal push rod, a first vertical plate, a first cross plate, a notching push rod, an H-shaped notching knife and a pressure block. The first side base plate is equipped with a first horizontal push rod, the movable end of the first horizontal push rod is equipped with a first vertical plate, the outer side of the first vertical plate is equipped with a first cross plate and a pressure block located below it, the notching push rod is equipped with a first vertical plate, the movable end of the notching push rod is equipped with an H-shaped notching knife, and the upper side of the pressure block is provided with an avoidance groove that cooperates with the H-shaped notching knife.

4. The multi-stage centrifugal pump cover automatic punching system according to claim 3, characterized in that: The drive mechanism of the present invention comprises a third motor, a face gear, a radial shaft, a bevel gear, a pressure block and a return spring, the third motor is mounted on the second vertical plate, the output end of the third motor is mounted on the face gear, one end of the radial shaft is mounted on the bevel gear that cooperates with the face gear, the radial shaft is provided with two screw sections with opposite rotation directions, the inner support plate and the outer support plate intersect each other near the inner end portion, and a positioning pin is installed at the intersection, the inner ends of the inner support plate and the outer support plate are provided with a through hole for convenient passage of the radial shaft, the pressure block is provided with a screw slot that cooperates with the corresponding screw section, the pressure block is provided with a total of two and respectively abuts against the outer side of the inner end portion of the inner support plate and the outer support plate, the radial shaft is located between the inner end portion of the inner support plate and the outer support plate and is sleeved with a return spring; the second vertical plate is provided with a movable cavity for facilitating the movement of the face gear and the bevel gear, and a radial groove for facilitating the relative flipping of the two support plates and the radial displacement of the pressure block, the inner end of the radial slot is connected to the movable cavity through the through shaft slot.

5. The automatic punching system for a multi-stage centrifugal pump cover according to claim 1 is characterized in that: The locking assembly includes a third side base plate, a third horizontal push rod, a rotary drive, a third vertical plate, a second cross plate, a bending push rod, a bending punch, a screw motor, a screw, a movable cross plate and a mechanical inner support clamp, and the third horizontal push rod is installed on the third side base plate, and the movable end of the third horizontal push rod is installed with a rotary drive, and the third vertical plate is installed on the outer side of the movable ring of the rotary drive, and the second cross plate is fixed with the bending push rod, and the movable end of the bending push rod is installed with a bending punch, and the output end of the screw motor is installed with a screw, and the outer side of the screw is sleeved with a movable cross plate matching it. One end of the movable cross plate is slidably restricted on the third vertical plate, and the other end of the movable cross plate is located at a position opposite to the bending punch and is installed with a mechanical inner support clamp.

6. The multi-stage centrifugal pump cover automatic punching system according to claim 1, characterized in that: It also includes a controller and a loading and unloading robot. The loading and unloading robot is arranged near the loading and unloading station and is used to realize the loading operation of the pump cover body and the unloading operation of the reinforced pump cover; the controller is respectively connected to the clamping assembly, the grooving assembly, the support body feeding assembly, the locking assembly and the loading and unloading robot.

7. A method for automatically punching a multi-stage centrifugal pump cover, implemented based on the automatic punching system for a multi-stage centrifugal pump cover according to any one of claims 1 to 6, characterized in that: The steps include: S1. Use the loading and unloading manipulator to send the pump cover body to the loading and unloading station of the clamping assembly; S2. Clamp the pump cover body with a clamping assembly and drive it to rotate from the loading and unloading station to the notching station. Use the notching assembly to punch an H-shaped groove along the cylindrical spiral line on the pump cover body. S3. Use the clamping assembly to drive the pump cover body to rotate from the notching station to the support body feeding station, and use the support body feeding assembly to deliver the inner spiral support body and the outer spiral support body to the preset positions inside and outside the pump cover body respectively; S4. Using the clamping assembly, the pump cover body, the inner spiral support body, and the outer spiral support body are rotated from the support body feeding station to the locking station. The locking assembly is used to alternately bend the protruding pieces formed by the H-shaped grooves in the pump cover body inward or outward. The protruding pieces formed by the H-shaped grooves in the pump cover body are bent inward to form inner locking pieces for locking the inner spiral support body, and the protruding pieces formed by the H-shaped grooves in the pump cover body are bent outward to form outer locking pieces for locking the outer spiral support body. Finally, a reinforced pump cover is obtained. S5. Use the clamping assembly to drive the reinforced pump cover to rotate from the locking station to the loading and unloading station, and use the loading and unloading robot to remove the reinforced pump cover from the loading and unloading station.

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