A centrifugal pump impeller metal insert pressing device

Abstract

This utility model relates to the field of centrifugal pump impeller processing technology, and proposes a pressing device for a centrifugal pump impeller metal insert, including a cabinet and a metal insert. The metal insert includes a metal impeller and a fluoroplastic upper shell and a fluoroplastic lower shell that match the metal impeller. A cylinder is fixedly installed in the cabinet. The piston rod end of the cylinder is fixed with a sleeve mechanism for sequentially inserting the fluoroplastic lower shell, the metal impeller, and the fluoroplastic upper shell. A base support component is fixed in the cabinet for supporting the metal insert inserted on the sleeve mechanism. This utility model adopts a five-layer vertical linkage structure of cylinder-sleeve mechanism-base support component-molding component-pressing mechanism. Each component forms a precise axial motion guiding system through guide holes and sliding pins. The funnel-shaped design of the sleeve rod group of the sleeve mechanism and the guide hole of the mold plate realizes accurate alignment of the fluoroplastic lower shell, the metal impeller, and the fluoroplastic upper shell, and can also eliminate the coaxiality error of the sleeve rod group.

Description

Technical Field

[0001] This utility model relates to the field of centrifugal pump impeller processing technology, specifically to a pressing device for metal inserts of centrifugal pump impellers. Background Technology

[0002] Fluoroplastic alloy centrifugal pumps currently utilize advanced mechanical seals. Their characteristics include compensating for radial runout of the pump shaft, externally mounted seals for easy installation and removal, intuitive operation status monitoring, excellent corrosion and wear resistance, multi-layer protection, and extended seal life. For conveying corrosive media containing impurities and particles, a waterless, single-end hard-to-hard (silicon carbide to silicon carbide) mechanical seal can be used. For strong alkalis and hydrofluoric acid, pressureless sintered silicon carbide seals are used. For example, CN106286376A discloses a fluoroplastic alloy centrifugal pump. This centrifugal pump includes: a pump body, oil cover, impeller, oil sight glass, rear cover, bearing, gland, bearing gland, seals, coupling, bracket, lifting bolts, and pump shaft. The pump cover, impeller, and shaft sleeve are all integrally sintered and pressed using metal inserts encased in fluoroplastic. In the traditional centrifugal pump impeller metal insert pressing device, since the metal insert is formed by pressing a metal impeller and a matching fluoroplastic upper shell and fluoroplastic lower shell, the fluoroplastic lower shell, metal impeller and fluoroplastic upper shell need to be manually placed in the mold in sequence before pressing. Due to human error, accurate alignment cannot be achieved, and the coaxiality error affects the accuracy of mold closing. Utility Model Content

[0003] This invention proposes a pressing device for metal inserts of impellers for centrifugal pumps, which solves the problem in the prior art where the coaxiality error of the fluoroplastic lower shell, metal impeller, and fluoroplastic upper shell affects the accuracy of mold closing.

[0004] The technical solution of this utility model is as follows: A centrifugal pump impeller metal insert pressing device includes a cabinet and a metal insert. The metal insert includes a metal impeller and a fluoroplastic upper shell and a fluoroplastic lower shell that are matched with the metal impeller. A cylinder is fixedly installed in the cabinet. The piston rod end of the cylinder is fixed with a sleeve mechanism for sequentially inserting the fluoroplastic lower shell, the metal impeller, and the fluoroplastic upper shell. A bottom support component is fixed in the cabinet for supporting the metal insert inserted on the sleeve mechanism. A molding component is fixed on the inner top of the cabinet to press the fluoroplastic lower shell, the metal impeller, and the fluoroplastic upper shell into shape under the top pressure of the sleeve mechanism. The molding component is provided with a pressing mechanism that demolds the metal insert from the bottom support component after the metal insert is formed and when the sleeve mechanism descends.

[0005] Preferably, the sleeve mechanism includes a tray for supporting the fluoroplastic lower shell and a sleeve rod assembly for center positioning of the fluoroplastic lower shell, the metal impeller, and the fluoroplastic upper shell.

[0006] Preferably, the base support component includes a support ring, and a plurality of support frames fixed inside the cabinet are welded to the outer side of the support ring.

[0007] Preferably, the inner side of the support ring is provided with a tapered groove that is wider at the top and narrower at the bottom, and the bottom of the tapered groove is provided with a liner that allows the tray to pass through while the fluoroplastic lower shell cannot.

[0008] Preferably, the molding component includes a mold plate, and the top surface of the mold plate is welded with a plurality of hangers fixed inside the cabinet.

[0009] Preferably, the center of the mold plate has a guide hole for the sleeve rod of the sleeve rod assembly to pass through, and the guide hole is a trumpet shape that is wider at the bottom and narrower at the top.

[0010] Preferably, the pressing mechanism includes a pressing ring located on the bottom inner side of the mold plate. The top surface of the pressing ring is fixed with a plurality of guide rods that slide through the mold plate, and the upper end of the guide rod is fixed with a fixing ring that coincides with the axis of the mold plate. A sliding pin is fixedly inserted through the fixing ring, and the lower end of the sliding pin is inserted into a guide hole and can slide vertically relative to the guide hole.

[0011] Preferably, a plurality of counterweights are placed above the fixing ring and fitted over the sliding pin.

[0012] The beneficial effects of this utility model are as follows:

[0013] 1. This utility model adopts a five-layer vertical linkage structure of cylinder-sleeving mechanism-bottom support component-molding component-pressing mechanism. Each component forms a precise axial motion guiding system through guide holes and sliding pins. The funnel-shaped design of the sleeve rod group of the sleeve mechanism and the guide hole of the mold plate realizes the accurate alignment of the fluoroplastic lower shell, metal impeller and fluoroplastic upper shell, and can also eliminate the coaxiality error of the sleeve rod group.

[0014] 2. In this utility model, a three-stage demolding mechanism consisting of a counterweight, a sliding pin, and a pressure ring is used to achieve immediate demolding after pressing by converting gravitational potential energy. The sliding cooperation between the guide rod and the fixed ring ensures the stability of the demolding process. Attached Figure Description

[0015] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0016] Figure 1 This is a schematic diagram of the structure of a centrifugal pump impeller metal insert pressing device proposed in this utility model;

[0017] Figure 2 This is a front view structural diagram of a centrifugal pump impeller metal insert pressing device proposed in this utility model;

[0018] Figure 3This is a schematic diagram of the sleeve mechanism, base component, and metal insert structure proposed in this utility model.

[0019] Figure 4 This is a schematic diagram of the base support component structure proposed in this utility model;

[0020] Figure 5 This is a schematic cross-sectional view of the base support component proposed in this utility model;

[0021] Figure 6 This is a schematic diagram of the molding component and pressing mechanism proposed in this utility model;

[0022] Figure 7 This is a schematic cross-sectional view of the molding component and pressing mechanism proposed in this utility model;

[0023] In the diagram: 1. Cabinet; 2. Sleeving mechanism; 21. Tray; 22. Through-sleeving rod assembly; 3. Base support component; 31. Support ring; 311. Conical groove; 312. Base liner; 32. Support frame; 4. Cylinder; 5. Molding component; 51. Mold plate; 511. Guide hole; 52. Hanger; 6. Pressing mechanism; 61. Pressure ring; 62. Guide rod; 63. Fixing ring; 64. Sliding pin; 65. Counterweight; 7. Metal insert; 71. Metal impeller; 72. Fluoroplastic upper shell; 73. Fluoroplastic lower shell. Detailed Implementation

[0024] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model.

[0025] Please see Figure 1 and Figure 2 This utility model provides a technical solution: a centrifugal pump impeller metal insert pressing device, including a cabinet 1 and a metal insert 7, such as... Figure 3As shown, the metal insert 7 includes a metal impeller 71 and a fluoroplastic upper shell 72 and a fluoroplastic lower shell 73 that are matched with the metal impeller 71. A cylinder 4 is fixedly installed inside the cabinet 1. The piston rod end of the cylinder 4 is fixed with a sleeve mechanism 2 for sequentially inserting the fluoroplastic lower shell 73, the metal impeller 71, and the fluoroplastic upper shell 72. A bottom support component 3 is fixed inside the cabinet 1 for supporting the metal insert 7 inserted on the sleeve mechanism 2. A molding component 5 is fixed on the inner side of the top of the cabinet 1 to press the fluoroplastic lower shell 73, the metal impeller 71, and the fluoroplastic upper shell 72 into shape under the pressure of the sleeve mechanism 2. A pressing mechanism 6 is provided on the molding component 5 to demold the metal insert 7 from the bottom support component 3 after the metal insert 7 is formed and when the sleeve mechanism 2 descends.

[0026] Please see Figure 3 The sleeve mechanism 2 includes a tray 21 for supporting the fluoroplastic lower shell 73 and a sleeve rod assembly 22 for center positioning of the fluoroplastic lower shell 73, the metal impeller 71, and the fluoroplastic upper shell 72.

[0027] Please see Figure 4 and Figure 5 The base support component 3 includes a support ring 31. Several support frames 32 fixed inside the cabinet 1 are welded to the outside of the support ring 31. The inner side of the support ring 31 is provided with a tapered groove 311 that is wider at the top and narrower at the bottom. The bottom of the tapered groove 311 is provided with a bottom liner 312 that allows the tray 21 to pass through while the fluoroplastic lower shell 73 cannot pass through.

[0028] Please see Figure 6 and Figure 7 The molding component 5 includes a mold plate 51. Several hangers 52 fixed in the cabinet 1 are welded to the top surface of the mold plate 51. A guide hole 511 is opened in the center of the mold plate 51 for the sleeve rod of the sleeve rod assembly 22 to pass through. The guide hole 511 is a flared shape with a wider bottom and a narrower top. The flared design of the sleeve rod assembly 22 of the sleeve mechanism 2 and the guide hole 511 of the mold plate can achieve alignment and also eliminate the coaxiality error of the sleeve rod assembly.

[0029] Please see Figure 6 and Figure 7 The molding mechanism 6 includes a pressure ring 61, which is located on the bottom inner side of the mold plate 51. Several guide rods 62 that slide through the mold plate 51 are fixed on the top surface of the pressure ring 61. A fixed ring 63 that coincides with the axis of the mold plate 51 is fixed at the upper end of the guide rod 62. A sliding pin 64 is fixedly inserted through the fixed ring 63. The lower end of the sliding pin 64 is inserted into the guide hole 511 and can slide vertically relative to the guide hole 511. Several counterweights 65 that are sleeved on the sliding pins 64 are placed above the fixed ring 63. Through the three-stage demolding mechanism of counterweights 65-sliding pins 64-pressure ring 61, the immediate demolding action after the pressing is completed is realized by the conversion of gravitational potential energy. The sliding cooperation between the guide rods 62 and the fixed ring 63 ensures the stability of the demolding process.

[0030] The working principle and usage process of this utility model are as follows: During processing, the fluoroplastic lower shell 73, metal impeller 71, and fluoroplastic upper shell 72 are sequentially placed outside the sleeve rod group 22 of the sleeve mechanism 2 and supported by the support ring 31. Then, the cylinder 4 drives the tray 21 of the sleeve mechanism 2 to move upward with the metal insert 7 and contact the mold plate 51 of the molding component 5. The fluoroplastic lower shell 73 below the metal impeller 71 is pushed upward by the tray 21, while the fluoroplastic upper shell 72 above the metal impeller 71 is subjected to the downward reaction force of the mold plate 51, so that the fluoroplastic lower shell 73, metal impeller 71, and fluoroplastic upper shell 72 are pressed into shape under pressure.

[0031] During the pressing process described above, the sleeve rod of the sleeve rod assembly 22 can push the sliding pin 64 through the guide hole 511, thereby causing the guide rod 62 outside the fixed ring 63 to drive the pressure ring 61 to retract upward. When the pressing is completed and the sleeve mechanism 2 descends, the fixed ring 63 is pushed by the counterweight 65 through the guide rod 62 to push the pressure ring 61, so that the pressure ring 61 dislodges the metal insert 7 below the mold plate 51, so that the formed metal insert 7 falls into the support ring 31 under the support of the sleeve mechanism 2, so that the metal insert 7 can be removed.

[0032] This technical solution achieves efficient and precise manufacturing of metal inserts for centrifugal pump impellers through mechanical structure innovation, and has significant advantages over traditional processes in terms of automation, production cost control, and finished product quality.

[0033] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A centrifugal pump impeller metal insert pressing device, comprising a cabinet (1) and a metal insert (7), wherein the metal insert (7) comprises a metal impeller (71) and a fluoroplastic upper shell (72) and a fluoroplastic lower shell (73) matching the metal impeller (71), characterized in that, A cylinder (4) is fixedly installed inside the cabinet (1). The piston rod end of the cylinder (4) is fixed with a sleeve mechanism (2) for sequentially sleeved with a fluoroplastic lower shell (73), a metal impeller (71), and a fluoroplastic upper shell (72). A bottom support component (3) is fixed inside the cabinet (1) for supporting the metal insert (7) sleeved on the sleeve mechanism (2). A molding component (5) is fixed on the inner side of the top of the cabinet (1) to press the fluoroplastic lower shell (73), the metal impeller (71), and the fluoroplastic upper shell (72) into shape under the pressure of the sleeve mechanism (2). A pressing mechanism (6) is provided on the molding component (5) to demold the metal insert (7) onto the bottom support component (3) after the metal insert (7) is formed and when the sleeve mechanism (2) descends.

2. The centrifugal pump impeller metal insert pressing device according to claim 1, characterized in that, The sleeve mechanism (2) includes a tray (21) for supporting the fluoroplastic lower shell (73) and a sleeve rod assembly (22) for center positioning of the fluoroplastic lower shell (73), the metal impeller (71), and the fluoroplastic upper shell (72).

3. The centrifugal pump impeller metal insert pressing device according to claim 2, characterized in that, The base support component (3) includes a support ring (31), and several support frames (32) fixed inside the cabinet (1) are welded to the outside of the support ring (31).

4. The impeller metal insert pressing device for a centrifugal pump according to claim 3, characterized in that, The inner side of the support ring (31) is provided with a tapered groove (311) that is wider at the top and narrower at the bottom. The bottom of the tapered groove (311) is provided with a liner (312) that allows the tray (21) to pass through while the fluoroplastic lower shell (73) cannot pass through.

5. The impeller metal insert pressing device for a centrifugal pump according to claim 2, characterized in that, The molding component (5) includes a mold plate (51), and a number of hangers (52) fixed inside the cabinet (1) are welded to the top surface of the mold plate (51).

6. The centrifugal pump impeller metal insert pressing device according to claim 5, characterized in that, The center of the mold plate (51) is provided with a guide hole (511) through which the sleeve rod of the sleeve rod assembly (22) passes. The guide hole (511) is a trumpet shape that is wider at the bottom and narrower at the top.

7. The impeller metal insert pressing device for a centrifugal pump according to claim 6, characterized in that, The pressing mechanism (6) includes a pressing ring (61), which is located on the inner side of the bottom of the mold plate (51). The top surface of the pressing ring (61) is fixed with a number of guide rods (62) that slide through the mold plate (51). The upper end of the guide rod (62) is fixed with a fixing ring (63) that coincides with the axis of the mold plate (51). A sliding pin (64) is fixedly inserted through the fixing ring (63). The lower end of the sliding pin (64) is inserted into the guide hole (511) and can slide vertically relative to the guide hole (511).

8. The impeller metal insert pressing device for a centrifugal pump according to claim 7, characterized in that, Several counterweights (65) are placed above the fixed ring (63) and fitted outside the sliding pin (64).

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