Multistage pump aligning dismounting tool and aligning dismounting method thereof

Abstract

The application belongs to the technical field of multi-stage pump disassembly and assembly, and discloses a multi-stage pump aligning disassembly and assembly tool and an aligning disassembly and assembly method thereof. The multi-stage pump aligning disassembly and assembly tool comprises a base, a plurality of second positioning assemblies and a jack. The base is provided with sliding rails and a plurality of first positioning assemblies. The first positioning assembly comprises an upper ring body, a lower ring body and a plurality of positioning blocks. The upper ring body and the lower ring body cooperatively form a positioning hole. The plurality of positioning blocks are arranged along the circumference of the positioning hole. The plurality of second positioning assemblies are arranged along the horizontal direction. The second positioning assembly comprises a lifting member and a positioning plate. The jack cooperates with the positioning plates of the plurality of second positioning assemblies to position the rotor. Through the arrangement of the first positioning assembly and the second positioning assembly, the concentricity of the inlet and outlet transition sections and the rotor is ensured, and the carbon ring between the impeller stages is not damaged. Moreover, the second positioning assembly integrates the traction and propulsion functions, and the multi-stage pump can be quickly overhauled and maintained.

Description

Technical Field

[0001] This invention relates to the field of multistage pump disassembly and assembly technology, and in particular to a multistage pump self-aligning disassembly and assembly tooling and its self-aligning disassembly and assembly method. Background Technology

[0002] For long-distance, high-flow-rate oil transportation, vertical multistage pumps are typically used. Taking the Karamay-Urumqi refined oil pipeline (hereinafter referred to as the Karamay-Urumqi pipeline) of Western Pipeline Company as an example, this pipeline is designed to transport 5.8 million tons of refined oil annually and is the main external transportation channel for Karamay Petrochemical Company. Its first station, the Karamay oil transfer station, consists of multiple four-stage vertical pumps. The vertical pumps and motors are 6.825m high, and the pump body is 3.429m long. Vertical maintenance would require dismantling the plant roof, posing numerous safety risks and significant difficulties. Therefore, the current mainstream dismantling method involves placing the pump body horizontally, horizontally extracting the multistage pump impeller assembly, and then horizontally reassembling it step by step. Vertical pumps typically have multiple impeller stages, sealed between the impeller stages with graphite carbon rings. However, when installing single-stage impellers and volutes onto the rotor, if precise concentricity cannot be guaranteed, rotor misalignment can easily damage the interstage carbon rings, requiring the assembled multistage pump to be disassembled and reassembled, affecting the maintenance and usage schedule. Summary of the Invention

[0003] One objective of this invention is to provide a multi-stage pump self-aligning and disassembly tooling that combines traction and propulsion functions, ensures rotor concentricity, prevents damage to interstage carbon rings, and facilitates quick and easy maintenance of multi-stage pumps.

[0004] To achieve this objective, the present invention adopts the following technical solution: a multi-stage pump self-aligning and disassembly fixture, wherein the multi-stage pump includes an inlet / outlet transition section and a rotor, the rotor includes a shaft, multiple impellers and a connecting cylinder, the multiple impellers and the connecting cylinder are all sleeved on the shaft, and the connecting cylinder flange connects the impellers and the inlet / outlet transition section; the multi-stage pump self-aligning and disassembly fixture includes a base, multiple second positioning components and a jack, the base is provided with a slide rail and multiple first positioning components, the slide rail is arranged horizontally, and the slide rail and the multiple first positioning components are arranged at intervals in the horizontal direction; the first positioning component includes an upper ring body and a lower... The system comprises a ring body and multiple positioning blocks. The upper and lower ring bodies are detachably connected and cooperate to form positioning holes. The multiple positioning blocks are located on the same side of the positioning holes and are spaced apart circumferentially along the positioning holes. The positioning blocks are capable of moving radially along the positioning holes. Multiple second positioning components are arranged at intervals in the horizontal direction. Each second positioning component includes a lifting member and a positioning plate. The lifting member is slidably connected to the slide rail and fixedly connected to the positioning plate to drive the positioning plate to move vertically. The positioning plate is provided with a first positioning groove. A jack cooperates with the positioning plates of the multiple second positioning components to position the rotor.

[0005] Preferably, a locking element is provided between the lifting component and the slide rail, and the lifting component is fixed to the slide rail by the locking element.

[0006] Preferably, the lifting component includes a base plate, two lifting modules, and a gearbox. The base plate is connected to the slide rail via a slider. The gearbox is mounted on the base plate and is equipped with a first lead screw. The two lifting modules are spaced apart on both sides of the positioning plate. Each lifting module includes a lifting seat, a second lead screw, and a connecting member. The second lead screw is vertically arranged and installed on the lifting seat. The first lead screw passes through the two lifting seats and is connected to the two second lead screws in a driving connection. The connecting member is fixed to the top of the first lead screw and connected to the positioning plate.

[0007] Preferably, the two ends of the upper ring body correspond to the two ends of the lower ring body, one end of the upper ring body is rotatably connected to one end of the corresponding lower ring body, and the other end of the upper ring body is detachably connected to the other end of the corresponding lower ring body.

[0008] Preferably, the lower ring body is provided with a base, the base is provided with a first connecting part, the base is provided with a plurality of second connecting parts, the plurality of second connecting parts are arranged at intervals along the horizontal direction, and the first connecting part is detachably connected to any of the second connecting parts.

[0009] Preferably, the upper ring body and the lower ring body are each provided with at least one fixing block, the fixing block and the positioning block are respectively arranged in a one-to-one correspondence, and a screw is provided between the fixing block and the positioning block. The screw is threadedly engaged with the fixing block and rotatably connected to the positioning block.

[0010] Preferably, the positioning block has a second positioning groove on the side near the center of the positioning hole.

[0011] Preferably, a pad is provided between the jack and the rotor, and the pad is detachably connected to the jack.

[0012] Another objective of this invention is to provide a method for disassembling and assembling a multi-stage pump, which can ensure the concentricity between the components of the multi-stage pump, facilitate the disassembly and installation of each stage impeller, and ensure the reliability, safety and convenience of maintenance.

[0013] To achieve this objective, the present invention adopts the following technical solution: a multi-stage pump self-aligning and disassembly method, applied to the aforementioned multi-stage pump self-aligning and disassembly fixture, comprising the following steps:

[0014] S100, Move the positioning block of the first positioning component to position the inlet / outlet transition section, and raise / lower the positioning plate and the jack of the second positioning component to position the rotor;

[0015] S200, Sequentially disassemble the inlet / outlet transition section and the connecting cylinder;

[0016] S300, Position the impeller and the optical axis using the second positioning component and the jack;

[0017] S400. Sequentially disassemble multiple impellers. For each impeller disassembled, adjust the positions of multiple second positioning components and the jack according to the center of gravity of the remaining rotor to ensure that the multiple impellers are concentric.

[0018] S500, reverse steps S200 to S400 to install multiple impellers, the connecting cylinder and the inlet / outlet transition section in sequence.

[0019] Preferably, after sequentially disassembling the inlet / outlet transition section and the connecting cylinder, the method further includes the following steps: rotating the rotor horizontally by 180°, so that the impeller moves from one end of the slide rail away from the first positioning component to the other end.

[0020] The beneficial effects of this invention are as follows: When disassembling a multi-stage pump using a multi-stage pump self-aligning and disassembly tooling, the user can first place the inlet and outlet transition sections into the positioning holes of multiple first components, and then move multiple positioning blocks to clamp and position the inlet and outlet transition sections, so that the inlet and outlet transition sections are in the center position of the first positioning components. Then, the height of the positioning plate is adjusted by the lifting component of the second positioning component, and the height of the jack is adjusted at the same time to support the rotor, ensuring that the inlet and outlet transition sections, rotor, and connecting cylinder are coaxial and without offset, thus achieving the positioning of the multi-stage pump. Next, the flanges at both ends of the connecting cylinder are disconnected, and the inlet and outlet transition sections and connecting cylinder are disassembled in sequence. Then, the rotor, which still has multiple impellers and optical shafts remaining, is rotated 180° so that the optical shaft is supported by the jack and the impellers are supported by the second positioning components. Then, multiple impellers are disassembled in sequence. After each impeller is disassembled, the jack and multiple second positioning components are adjusted to adapt to the change in the rotor's center of gravity, ensuring that the rotor does not tilt, until all impellers are disassembled and only the optical shaft remains. The user can reverse the above operations to install multiple impellers, connecting cylinders, and inlet and outlet transition sections in sequence. By setting up a first positioning component and a second positioning component, which use the base as a reference, the inlet and outlet transition sections and the rotor can be accurately positioned, ensuring the concentricity of the inlet and outlet transition sections and the rotor. Furthermore, the second positioning component integrates traction and propulsion functions, facilitating the disassembly of each impeller and thus enabling quick and easy maintenance of the multi-stage pump. Assembling the multi-stage pump with the undisassembled pump as a reference ensures that the interstage carbon rings of the impellers are not damaged, and avoids rubbing between the impeller housing and the pump housing.

[0021] The present invention also provides a method for disassembling and assembling a multistage pump. First, the old multistage pump is disassembled and positioned. Then, the new multistage pump is assembled with reference to the positioning reference of the old multistage pump. This ensures the concentricity between the components in the multistage pump and the consistency of the concentricity before and after the components are installed and removed. It facilitates the disassembly and installation of each stage impeller and ensures the reliability, safety and convenience of maintenance. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the multi-stage pump self-aligning disassembly and assembly tooling according to an embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram illustrating the use of the multi-stage pump self-aligning disassembly and assembly tooling according to an embodiment of the present invention;

[0024] Figure 3 Figure 1 Enlarged view of point A in the middle;

[0025] Figure 4 This is a schematic diagram of the structure of the fixing block and the positioning block according to an embodiment of the present invention;

[0026] Figure 5 yes Figure 4 Sectional view at point BB;

[0027] Figure 6 This is a flowchart illustrating the steps of a multi-stage pump self-aligning and disassembly method according to an embodiment of the present invention.

[0028] In the picture:

[0029] 1000. Multistage pump self-aligning and disassembly tooling;

[0030] 100. Base; 110. Slide rail; 120. Second connecting part; 130. Disassembly / assembly position;

[0031] 200. First positioning component; 210. Upper ring body; 211. Locking block; 212. Pin; 220. Lower ring body; 221. Base; 2211. First connecting part; 230. Positioning block; 231. Second positioning groove; 232. Insertion hole; 233. Pin hole; 240. Positioning hole; 250. Fixing block; 260. Screw; 261. Annular groove; 270. Limiting pin;

[0032] 300, Second positioning component; 310, Lifting component; 311, Base plate; 3111, Slider; 3112, Clearance hole; 312, Lifting module; 3121, Lifting seat; 3122, Second lead screw; 3123, Connector; 320, Gearbox; 321, First lead screw; 322, Handle; 330, Positioning plate; 331, First positioning groove; 340, Locking component;

[0033] 400. Jack; 410. Slot;

[0034] 2000, multistage pump;

[0035] 500. Import / export transition section;

[0036] 600, rotor; 610, optical shaft; 620, impeller; 630, connecting cylinder. Detailed Implementation

[0037] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0038] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0039] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0040] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0041] Reference Figures 1 to 4As shown, a multistage pump self-aligning and disassembly fixture 1000 provided according to an embodiment of this application is used to install or disassemble an extra-long vertical multistage pump 2000 (pump body length exceeding 3m). The multistage pump 2000 includes an inlet / outlet transition section 500 and a rotor 600. The inlet / outlet transition section 500 is a cylindrical pump casing portion with an inlet and an outlet. The rotor 600 includes a shaft 610, multiple impellers 620, and a connecting cylinder 630. The impellers 620 are fitted with volutes. The multiple impellers 620 and the connecting cylinder 630 are all fitted onto the shaft 610. The volute flanges of two adjacent impellers 620 are connected. The flange of the connecting cylinder 630 is connected between the impellers 620 and the inlet / outlet transition section 500. In other words, the two ends of the connecting cylinder 630 are respectively connected to the volute of the adjacent impellers 620 and the flange of the inlet / outlet transition section 500. Since the vertical multistage pump 2000 technology is mature and there are many types, only the components that need to be disassembled and assembled will be briefly described here, and will not be described in detail thereafter.

[0042] The multistage pump 2000 self-aligning disassembly and assembly fixture 1000 includes a base 100, multiple second positioning components 300, and a jack 400. The base 100 is rectangular in shape and is equipped with two slide rails 110 and multiple first positioning components 200. The slide rails 110 are arranged horizontally and the two slide rails 110 are arranged in parallel. The slide rails 110 and the multiple first positioning components 200 are arranged at intervals in the horizontal direction. The first positioning component 200 includes a semi-circular upper ring body 210, a semi-circular lower ring body 220, and multiple positioning blocks 230. The lower ring body 220 is fixed to the base 100. The upper ring body 210 and the lower ring body 220 are detachably connected and cooperate to form a positioning hole 240. The positioning hole 240 can be clearance-fitted with the inlet and outlet transition section 500. The multiple positioning blocks 230 are located on the same side of the positioning hole 240 and are spaced apart along the circumference of the positioning hole 240. The positioning blocks 230 can move radially along the positioning hole 240. The space between the slide rail 110 and the first positioning component 200 forms the disassembly / assembly position 130.

[0043] Multiple second positioning components 300 are arranged at intervals in the horizontal direction. Each second positioning component 300 includes a lifting member 310 and a positioning plate 330. The lifting member 310 is slidably connected to the slide rail 110, and the lifting member 310 is fixedly connected to the positioning plate 330 to drive the positioning plate 330 to move in the vertical direction. The positioning plate 330 is provided with a first positioning groove 331, which is either a V-shape with the opening facing upwards or a trapezoid with the top smaller than the bottom. In this embodiment, two first positioning components 200 and two second positioning components 300 are used as an example for explanation. Users can also set more first positioning components 200 and second positioning components 300 according to the actual size of the multi-stage pump 2000. The operation steps and effects are basically the same, and will not be described again here.

[0044] The jack 400 is independently positioned relative to the base 100, and cooperates with the positioning plates 330 of multiple second positioning components 300 to position the rotor 600. Optionally, the jack 400 is a threaded adjustable jack 400, and the jack rod of the jack 400 is fixed by a pin. Since the jack 400 technology is mature and there are many types, it will not be described in detail here.

[0045] Understandably, when a user disassembles a multistage pump 2000 using the multistage pump self-aligning disassembly and assembly tool 1000 (components of the multistage pump 2000, such as the motor, which do not require high concentricity assembly, have already been removed), they can first disassemble the upper ring body 210, place the inlet / outlet transition section 500 onto the lower ring body 220, and then connect the upper ring body 210 and the lower ring body 220 so that the inlet / outlet transition section 500 is positioned in the positioning holes 240 of the two first components. Then, multiple positioning blocks 230 are moved to clamp and position the inlet / outlet transition section 500, placing it at the center of the first positioning component 200. Specifically, at least three positioning blocks 230 are provided; in this embodiment, four positioning blocks 230 are provided. The four positioning blocks 230 are equidistantly arranged circumferentially along the positioning holes 240 of the positioning blocks 230. The user can first move three positioning blocks 230 radially along the positioning holes 240 to position the inlet / outlet transition section 500, and then move the last positioning block 230 to clamp and fix the inlet / outlet transition section 500.

[0046] It should be noted that since multiple positioning blocks 230 are adjusted individually, in order to ensure that the inlet / outlet transition section 500 is concentric with the positioning hole 240, the user can use a spirit level for reference calibration during adjustment to ensure that the inlet / outlet transition section 500 remains horizontal in the radial direction and centered in the circumferential direction. This is specifically mentioned here to avoid misunderstanding.

[0047] After the inlet / outlet transition section 500 is positioned, the height of the positioning plate 330 is adjusted by the lifting component 310 of the second positioning assembly 300, so that the first positioning groove 331 of the positioning plate 330 supports the volute outside the impeller 620. At the same time, the height of the jack 400 is adjusted to support the connecting cylinder 630 of the rotor 600. A spirit level is used for calibration to ensure that the inlet / outlet transition section 500, the rotor 600, and the connecting cylinder 630 are coaxial and without misalignment, thus achieving the positioning of the multi-stage pump 2000. At this time, the connecting cylinder and the jack 400 are both located at the disassembly / assembly position 130.

[0048] Next, disconnect the flanges at both ends of the connecting cylinder 630, and disassemble the inlet and outlet transition sections 500 and the connecting cylinder 630 in sequence. Specifically, the user first removes the upper ring body 210 to open the positioning hole 240 to move the outlet transition section out, and then pulls the connecting cylinder 630 out from the disassembly position 130 along the axial direction of the optical axis 610 in the direction away from the impeller 620. Then, the rotor 600, which still has multiple impellers 620 and optical shaft 610, is rotated 180° around the vertical axis. At the same time, the jack 400, which originally supported the connecting cylinder, is moved from the disassembly position 130 to the end of the slide rail 110 away from the first positioning component 200, so that the jack 400 supports the optical shaft 610 after the rotation, and the second positioning component 300 supports the impellers 620 after the rotation, so that the impellers 620 are located at the disassembly position 130. Then, the second positioning component 300, which is close to the disassembly position 130, is moved along the optical shaft 610 axial direction toward the first positioning component 200 to disassemble multiple impellers 620 in sequence.

[0049] Because the optical shaft 610 is relatively long and the mass of the impeller 620 and volute is greater than the mass of the optical shaft 610, the center of gravity of the rotor 600 will be closer to the impeller 620 in the radial direction of the optical shaft 610. Furthermore, as the impeller 620 is disassembled, the center of gravity will gradually move closer to the middle section of the optical shaft 610. Therefore, each time an impeller 620 is disassembled, the positions of the jack 400 and multiple second positioning components 300 in the radial direction of the optical shaft 610 are adjusted to accommodate the change in the center of gravity of the rotor 600, ensuring that the rotor 600 does not tilt and maintaining the concentricity of the impeller 620 and the optical shaft 610, until all impellers 620 are disassembled and only the optical shaft 610 remains, thus achieving the disassembly of the multistage pump 2000.

[0050] It should be noted that when disassembling the last impeller 620 (first-stage impeller 620), the positioning plates 330 of the two second support components are respectively supported at both ends of the outer volute of the first-stage impeller 620. The user can lift the optical shaft 610 with a lifting tool and then move the two second support components horizontally to disassemble the first-stage impeller 620. After that, the two second support components can remain unchanged to facilitate the subsequent installation of the multistage pump 2000.

[0051] After disassembling the multistage pump 2000, the user reverses the above operations. Specifically, the user first positions and supports the first impeller 620 (first-stage impeller 620) at disassembly / reassembly position 130 using the second support assembly. Then, the user positions and supports the optical shaft 610 using the jack 400, inserting one end of the optical shaft 610 into the first-stage impeller 620. Next, the user adjusts the second support assembly and jack 400 to the position previously used for disassembling the second-to-last impeller 620 (second-stage impeller 620). Simultaneously, the user lowers the second positioning assembly 300 near disassembly / reassembly position 130 and installs the second-stage impeller 620. The first impeller 620 causes the second impeller 620 to fall into the first positioning groove 331 of the lowered second positioning component 300. Then, the steps of adjusting the position of the second support component and the jack 400 and installing the impeller 620 are repeated until all impellers 620 are installed. The rotor 600 is rotated 180° so that the end of the optical shaft 610 away from the impeller 620 enters above the lower ring body 220. The jack 400 is moved to the disassembly position 130, and the connecting cylinder and the inlet and outlet transition section 500 are sequentially inserted and installed to realize the installation of the multi-stage pump 2000.

[0052] By setting up a first positioning component 200 and a second positioning component 300, the first positioning component 200 can accurately position the inlet and outlet transition section 500, and the second component can accurately position the rotor 600. The first and second positioning components 200 and 300 use the base 100 as the same reference, ensuring the concentricity of the inlet and outlet transition section 500 and the rotor 600. Furthermore, the second positioning component 300 integrates traction and propulsion functions, facilitating the disassembly of each impeller 620, thereby facilitating quick and easy maintenance of the multistage pump 2000. The assembly of the multistage pump 2000 is based on the undisassembled multistage pump 2000, ensuring consistent concentricity before and after assembly and disassembly, preventing damage to the interstage carbon rings of the impeller 620, and avoiding friction between the impeller 620 housing and the pump housing.

[0053] Furthermore, a pad is provided between the jack 400 and the optical shaft 610, and the pad is detachably connected to the jack 400. Optionally, the top end of the jack rod of the jack 400 is provided with a slot 410, and the pad engages with the slot 410.

[0054] By setting up shims, on the one hand, the shims can extend the vertical height of the jack 400, filling the gap between the top of the jack 400 and the optical shaft 610, ensuring that the jack 400 can stably support the optical shaft 610; on the other hand, after the user raises and lowers the jack 400 to support the connecting cylinder, the jack 400 height remains unchanged, and the optical shaft 610 part after the connecting cylinder is disassembled is supported by the shims. This makes it convenient for the user to directly remove the shims to support and position the connecting cylinder 630 when reinstalling the multistage pump 2000 without adjusting the height of the jack 400, effectively improving the ease of use of the self-aligning device.

[0055] Reference Figure 1and Figure 2 As shown, the lifting component 310 includes a base plate 311, two lifting modules 312, and a gearbox 320. The base plate 311 is horizontally positioned above the two slide rails 110. Two sliders 3111 are spaced apart at the bottom of the base plate 311, and the base plate 311 is correspondingly connected to the slide rails 110 through the sliders 3111. The gearbox 320 is mounted on the base plate 311. The input end of the gearbox 320 is provided with a handle 322, and the output end is provided with a first lead screw 321. The two lifting modules 312 are spaced apart on the positioning plate 330. On both sides, the lifting module 312 includes a lifting seat 3121, a second lead screw 3122, and a connecting member 3123. The second lead screw 3122 is vertically arranged and installed on the lifting seat 3121 through a bushing. The first lead screw 321 passes through the two lifting seats 3121 and is connected to the two second lead screws 3122. The connecting member 3123 is fixed to the top of the first lead screw 321 and connected to the positioning plate 330. Specifically, the connecting member 3123 is saddle-shaped, and the gap of the saddle-shaped connecting member 3123 engages with the positioning plate 330. Optionally, the gearbox 320 is located on one side of one of the lifting seats 3121. The gearbox 320 can be integrally formed with the adjacent lifting seat 3121 or can be set independently of the lifting seat 3121, which will not be described in detail here.

[0056] When the user rotates handle 322, the gear set inside gearbox 320 can stably transmit power to the first lead screw 321, which in turn drives the second lead screw 3122 to rotate and lift, thereby achieving lifting control of the positioning plate 330. By setting up lifting module 312 and gearbox 320, gearbox 320 is easy to operate and has stable transmission, while the second lead screw 3122 of lifting module 312 has high control precision and stable transmission, which can effectively improve the movement stability, controllability and control precision of positioning plate 330.

[0057] It should be added that the substrate 311 is provided with a clearance hole 3112 that runs vertically through the substrate 311. The clearance hole 3112 is located directly below the positioning plate 330 to avoid the positioning plate 330, so as to avoid interference between the positioning plate 330 and the substrate 311 and affect the lifting of the positioning plate 330, thus effectively improving the structural rationality of the second positioning component 300.

[0058] Reference Figure 1 As shown, it can be understood that a locking element 340 is provided between the lifting component 310 and the slide rail 110, and the lifting component 310 is fixed to the slide rail 110 by the locking element 340. Optionally, the locking element 340 may be an electromagnetic lock, a mechanical lock, or a limit block that can be detachably installed on the base 100, etc., which will not be described in detail here.

[0059] By providing the locking component 340, users can lock the second positioning component 300 onto the slide rail 110 when installing or disassembling the connecting cylinder and the inlet / outlet transition section 500, thereby improving the support stability of the impeller 620. Alternatively, when handling, storing, or disassembling the self-aligning tooling, the second positioning component 300 can be locked onto the slide rail 110 to prevent it from detaching, facilitating the handling, storage, and disassembly of the self-aligning tooling. In this embodiment, the locking component 340 is configured as a bolt that is threadedly connected to the slider 3111 and can abut against the guide rail, simplifying the structure of the locking component 340 and facilitating its assembly and use.

[0060] Reference Figure 1 and Figure 3 As shown, it can be understood that the two ends of the upper ring 210 correspond to the two ends of the lower ring 220. One end of the upper ring 210 is rotatably connected to the corresponding end of the lower ring 220 via a pin and can rotate around the pin. The pin is parallel to the center line of the positioning hole 240. The other end of the upper ring 210 is detachably connected to the other end of the corresponding lower ring 220. Optionally, the end of the upper ring 210 away from the pin and the corresponding end of the lower ring 220 can be connected by an electromagnetic lock, a mechanical lock, fasteners, a slot 410, or a block 211 structure, etc., which will not be elaborated here.

[0061] The upper ring 210 and the lower ring 220 are rotatably connected at one end, while the other end is detachable. This allows the user to easily open the positioning hole 240 to install or remove the inlet / outlet transition section 500 without completely disassembling the upper ring 210, further improving the ease of use of the first positioning component 200. In this embodiment, the end of the upper ring 210 away from the pin is provided with a locking block 211. The locking block 211 has a gap for the end of the lower ring 220 to pass through. A detachable pin 212 is connected to the locking block 211. The end of the lower ring 220 corresponding to the locking block 211 is provided with a through hole. The pin 212 passes through the through hole to fix the end of the lower ring 220 away from the pin, thereby simplifying the connection structure between the upper ring 210 and the lower ring 220 and facilitating user operation.

[0062] Furthermore, the lower ring body 220 is provided with a base 221, the base 221 is provided with a first connecting part 2211, and the base 100 is provided with a plurality of second connecting parts 120, which are arranged at intervals in the horizontal direction. The first connecting part 2211 is detachably connected to any of the second connecting parts 120. Optionally, the first connecting part 2211 and the second connecting part 120 can be a mutually cooperating plug-in slot structure, a locking block 211 slot 410 structure, a bolt screw hole structure, etc., which will not be described in detail here.

[0063] By setting the first connecting part 2211 and the second connecting part 120, the user can easily adjust the horizontal position of the lower ring 220 on the base 100, thereby adjusting the gap between the multiple first positioning components 200 and the total horizontal length of the multiple first positioning components 200 on the base 100, or adjusting the length of the disassembly / assembly position 130 between the slide rail 110 and the first positioning component 200, so as to adapt to inlet and outlet transition sections 500 of different lengths, expand the applicability of the disassembly / assembly self-aligning tool, and improve the practicality of the disassembly / assembly self-aligning tool.

[0064] Reference Figure 1 , Figure 4 and Figure 5 As shown, it can be understood that the upper ring body 210 and the lower ring body 220 are each provided with at least one fixing block 250. The fixing block 250 is bolted to the corresponding upper ring body 210 or lower ring body 220, and the fixing block 250 is provided in a one-to-one correspondence with the positioning block 230. For example, in this embodiment, there are four positioning blocks 230. Therefore, one fixing block 250 can be provided on the upper ring body 210 and three fixing blocks 250 can be provided on the lower ring body 220, or three fixing blocks 250 can be provided on the upper ring body 210 and one fixing block 250 can be provided on the lower ring body 220, or two fixing blocks 250 can be provided on the upper ring body 210 and the lower ring body 220 respectively. A screw 260 is provided between the fixing block 250 and the positioning block 230. The screw 260 is threadedly engaged with the fixing block 250 and rotatably connected to the positioning block 230.

[0065] Specifically, the bottom surface of the positioning block 230 is provided with an insertion hole 232. The positioning block 230 is provided with two pin holes 233 that penetrate the positioning block 230 along the wall thickness direction. Both pin holes 233 are connected to the insertion hole 232. One end of the screw 260 is accommodated in the insertion hole 232 and is provided with an annular groove 261. The positioning block 230 is connected with a corresponding limiting pin 270 that passes through the pin hole 233. The limiting pin 270 is partially accommodated in the annular groove 261 to limit the screw 260, thereby realizing the rotational connection between the screw 260 and the positioning block 230.

[0066] The user rotates the screw 260, which slides relative to the fixed block 250 under the guidance of the thread, driving the positioning block 230 to move radially along the positioning hole 240. The upper ring 210 or lower ring 220 adjacent to the positioning block 230 can restrict the rotation of the positioning block 230, keeping it in translational motion. By setting the fixed block 250 and the screw 260, the adjustment accuracy and movement stability of the positioning block 230 can be effectively improved.

[0067] Furthermore, the positioning block 230 is provided with a second positioning groove 231 on the side near the center of the positioning hole 240. The second positioning groove 231 is V-shaped, opening towards the center of the positioning hole 240, or trapezoidal, with the inner diameter of the positioning hole 240 gradually increasing.

[0068] By setting a second positioning groove 231, which makes two-point contact with the cylindrical inlet and outlet transition section 500, the positioning accuracy of the positioning block 230 can be improved, and the structural consistency of the first positioning component 200 and the second positioning component 300 can be improved.

[0069] Reference Figure 6 As shown, a multi-stage pump self-aligning and disassembly method according to an embodiment of this application, applied to the aforementioned multi-stage pump self-aligning and disassembly fixture 1000, includes the following steps:

[0070] S100, the positioning block 230 of the first positioning component 200 is moved to position the inlet and outlet transition section 500, and the positioning plate 330 and jack 400 of the second positioning component 300 are raised and lowered to position the rotor 600.

[0071] Specifically, after the user places the inlet / outlet transition section 500 into the positioning holes 240 of the multiple first components, the user moves the multiple positioning blocks 230 so that the multiple positioning blocks 230 cooperate to clamp and position the inlet / outlet transition section 500, ensuring that the inlet / outlet transition section 500 is in the center position of the first positioning component 200, thereby achieving the positioning of the inlet / outlet transition section 500. Then, the user adjusts the height of the positioning plate 330 through the lifting component 310 so that the first positioning groove 331 of the positioning plate 330 supports the volute outside the impeller 620. At the same time, the user adjusts the height of the jack 400 so that the jack 400 supports the connecting cylinder of the rotor 600, thereby achieving the positioning of the rotor 600 and ensuring that the rotor 600 and the inlet / outlet transition section 500 are horizontally coaxial without deviation.

[0072] S200, disassemble the inlet / outlet transition section 500 and the connecting cylinder 630 in sequence;

[0073] Specifically, the user disconnects the flanges at both ends of the connecting cylinder 630, removes the upper ring body 210 to open the positioning hole 240, first moves the outlet transition section out of the first positioning component 200, and then pulls the connecting cylinder 630 out from the disassembly position 130, thereby disassembling the inlet and outlet transition section 500 and the connecting cylinder 630.

[0074] S300, using the second positioning component 300 and jack 400 to position the impeller 620 and optical shaft 610;

[0075] Specifically, the user uses the second positioning component 300 to position and support multiple impellers 620, and moves the jack 400 to position and support the optical axis 610 after removing the connecting cylinder 630.

[0076] S400. Disassemble multiple impellers 620 in sequence. After disassembling each impeller 620, adjust the positions of multiple second positioning components 300 and jacks 400 in sequence according to the center of gravity of the remaining rotor 600 to ensure that the multiple impellers 620 are concentric.

[0077] S500, reverse steps S200 to S400 to install multiple impellers 620, connecting cylinders 630 and inlet / outlet transition sections 500 in sequence.

[0078] The steps S200 to S40 are executed in reverse order. First, the user positions and supports the optical shaft 610 using the second support component and jack 400, and moves one end of the optical shaft 610 to the disassembly / assembly position 130. Then, the first impeller 620 (first-stage impeller 620) is installed from the disassembly / assembly position 130. Next, the second support component and jack 400 are adjusted to the position where the last impeller 620 was previously disassembled. At the same time, the second positioning component 300 near the disassembly / assembly position 130 is lowered, and the first-stage impeller 620 is moved so that it falls into the first positioning groove 331 of the lowered second positioning component 300. Then, the steps of adjusting the position of the second support component and jack 400 and installing the impeller 620 are repeated until all impellers 620 are installed. The jack 400 is moved to the disassembly / assembly position 130, and the connecting cylinder 630 and the inlet / outlet transition section 500 are sequentially inserted and installed to realize the installation of the multi-stage pump 2000.

[0079] Understandably, by setting up the first positioning component 200 and the second positioning component 300, the first positioning component 200 and the second component work together to accurately position the inlet and outlet transition section 500 and the rotor 600, and ensure the concentricity of the inlet and outlet transition section 500 and the rotor 600. The second positioning component 300 integrates traction and propulsion functions, facilitating the disassembly of each impeller 620, thereby facilitating quick and easy maintenance of the multistage pump 2000. The old multistage pump 2000 is first positioned and disassembled, and then the new multistage pump 2000 is assembled with reference to the positioning benchmark of the old multistage pump 2000. The assembly of the multistage pump 2000 uses the undisassembled multistage pump 2000 as a benchmark, ensuring that the concentricity of the multistage pump 2000 remains consistent before and after assembly and disassembly. This ensures that the interstage carbon rings of the impeller 620 are not damaged, facilitates the disassembly and installation of each stage of the impeller 620, ensures the reliability, safety, and convenience of maintenance, and avoids friction between the impeller 620 housing and the pump housing.

[0080] Furthermore, after step S200, the following steps are also included: rotating the rotor 600 horizontally by 180° using a lifting device (i.e., the axis of rotation of the rotor 600 is perpendicular to the horizontal plane), so that the impeller 620 moves from one end of the slide rail 110 away from the first positioning component 200 to the other end.

[0081] In the disassembly process of the multistage pump 2000, after disassembling the inlet / outlet transition section 500 and the connecting cylinder 630 and before disassembling the multiple impellers 620, the rotor 600, which is separated from the inlet / outlet transition section 500 and the connecting cylinder 630, is rotated horizontally by 180°. While ensuring the concentricity between the multiple impellers 620, the end of the longer optical shaft 610 away from the impeller 620 can be rotated from the transition position and positioning hole 240 to the end of the slide rail 110 away from the first positioning component 200. This allows the impeller 620 to be disassembled to be moved to the disassembly / removal position 130, facilitating the user's subsequent disassembly of the impeller 620 or transfer of the optical shaft 610. This avoids interference between the disassembled optical shaft 610 and the first positioning component 200, improving the smoothness of the disassembly of the multistage pump 2000.

[0082] During the installation of the multistage pump 2000, after installing multiple impellers 620 and before installing the inlet / outlet transition section 500 and the connecting cylinder 630, the rotor 600, which is separate from the inlet / outlet transition section 500 and the connecting cylinder 630, is rotated horizontally by 180°. Under the premise of ensuring the concentricity between the multiple impellers 620, the user can directly position the outlet transition section and the connecting cylinder 630 through the first positioning component 200, thereby improving the smoothness of the installation of the multistage pump 2000.

[0083] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A multistage pump self-aligning and disassembly fixture, the multistage pump (2000) including an inlet / outlet transition section (500) and a rotor (600), the rotor (600) including a shaft (610), multiple impellers (620) and a connecting cylinder (630), the multiple impellers (620) and the connecting cylinder (630) are all sleeved on the shaft (610), the connecting cylinder (630) is flanged between the impellers (620) and the inlet / outlet transition section (500), characterized in that, The multi-stage pump self-aligning and disassembly tooling includes: The base (100) is provided with a slide rail (110) and a plurality of first positioning components (200). The slide rail (110) is arranged in a horizontal direction. The slide rail (110) and the plurality of first positioning components (200) are arranged at intervals in a horizontal direction. The first positioning component (200) includes an upper ring body (210), a lower ring body (220) and a plurality of positioning blocks (230). The upper ring body (210) and the lower ring body (220) are detachably connected and cooperate to form a positioning hole (240). The plurality of positioning blocks (230) are located on the same side of the positioning hole (240) and are arranged at intervals in the circumferential direction of the positioning hole (240). The positioning blocks (230) can move radially along the positioning hole (240). Multiple second positioning components (300) are arranged at intervals along the horizontal direction. Each second positioning component (300) includes a lifting member (310) and a positioning plate (330). The lifting member (310) is slidably connected to the slide rail (110), and the lifting member (310) is fixedly connected to the positioning plate (330) to drive the positioning plate (330) to move in the vertical direction. The positioning plate (330) is provided with a first positioning groove (331). The jack (400) cooperates with the positioning plate (330) of the plurality of second positioning components (300) to position the rotor (600).

2. The multi-stage pump self-aligning and disassembly fixture according to claim 1, characterized in that, A locking member (340) is provided between the lifting member (310) and the slide rail (110), and the lifting member (310) is fixed to the slide rail (110) by the locking member (340).

3. The multi-stage pump self-aligning and disassembly fixture according to claim 2, characterized in that, The lifting component (310) includes a base plate (311), two lifting modules (312), and a gearbox (320). The base plate (311) is connected to the slide rail (110) via a slider (3111). The gearbox (320) is mounted on the base plate (311) and has a first lead screw (321). The two lifting modules (312) are spaced apart on both sides of the positioning plate (330). Each lifting module (312) includes a lifting seat (3121), a second lead screw (3122), and a connector (3123). The second lead screw (3122) is vertically arranged and mounted on the lifting seat (3121). The first lead screw (321) passes through the two lifting seats (3121) and is connected to the two second lead screws (3122) in a transmission connection. The connector (3123) is fixed to the top of the first lead screw (321) and connected to the positioning plate (330).

4. The multi-stage pump self-aligning and disassembly fixture according to claim 1, characterized in that, The two ends of the upper ring (210) correspond to the two ends of the lower ring (220). One end of the upper ring (210) is rotatably connected to one end of the corresponding lower ring (220), and the other end of the upper ring (210) is detachably connected to the other end of the corresponding lower ring (220).

5. The multi-stage pump self-aligning and disassembly tooling according to claim 1 or 4, characterized in that, The lower ring body (220) is provided with a base (221), the base (221) is provided with a first connecting part (2211), the base (100) is provided with a plurality of second connecting parts (120), the plurality of second connecting parts (120) are arranged at intervals along the horizontal direction, and the first connecting part (2211) is detachably connected to any of the second connecting parts (120).

6. The multi-stage pump self-aligning and disassembly fixture according to claim 1, characterized in that, The upper ring body (210) and the lower ring body (220) are each provided with at least one fixing block (250). The fixing block (250) and the positioning block (230) are respectively provided. A screw (260) is provided between the fixing block (250) and the positioning block (230). The screw (260) is threadedly engaged with the fixing block (250) and rotatably connected to the positioning block (230).

7. The multi-stage pump self-aligning and disassembly tooling according to claim 1 or 6, characterized in that, The positioning block (230) has a second positioning groove (231) on the side near the center of the positioning hole (240).

8. The multi-stage pump self-aligning and disassembly fixture according to claim 1, characterized in that, A pad is provided between the jack (400) and the optical axis (610), and the pad is detachably connected to the jack (400).

9. A method for assembling and disassembling a multi-stage pump, applied to the multi-stage pump self-aligning and disassembling fixture described in any one of claims 1-8, characterized in that, Includes the following steps: S100, Move the positioning block (230) of the first positioning component (200) to position the inlet / outlet transition section (500), and raise and lower the positioning plate (330) and the jack (400) of the second positioning component (300) to position the rotor (600). S200, Sequentially disassemble the inlet / outlet transition section (500) and the connecting cylinder (630); S300, Position the impeller (620) and the optical axis (610) using the second positioning component (300) and the jack (400); S400, disassemble multiple impellers (620) in sequence. For each impeller (620) disassembled, adjust the positions of multiple second positioning components (300) and the jack (400) in sequence according to the center of gravity of the remaining rotor (600) to ensure that the multiple impellers (620) are concentric. S500, reverse steps S200 to S400 to install multiple impellers (620), the connecting cylinder (630) and the inlet / outlet transition section (500) in sequence.

10. The method for assembling and disassembling a multi-stage pump according to claim 9, characterized in that, After sequentially disassembling the inlet / outlet transition section (500) and the connecting cylinder (630), the process further includes the following steps: The rotor (600) is rotated horizontally by 180°, so that the impeller (620) is moved from one end of the slide rail (110) away from the first positioning component (200) to the other end.

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