A tooling for preparing expansion joints on a stator shield

Abstract

The present invention relates to a tooling for manufacturing an expansion joint on a stator shielding sleeve, comprising: a positioning disc (3); a guide rail frame (1), one end of the guide rail frame (1) passes through a through hole provided in the middle of the positioning disc (3) and is fixedly connected to the positioning disc (3), and the other end is provided with a plurality of guide rails (6) slidably connected to the guide rail frame (1); a roller (7) is provided at the working end of the guide rail (6); a screw rod (8) with a conical working end, the working end of the screw rod (8) is inserted into a through hole provided in the middle of the guide rail frame (1) and is threadedly connected to the through hole in the middle of the guide rail frame (1). Compared with the prior art, the present invention is installed at the stop of the stator. During use, after the screw rod is screwed in until the working surface contacts the conical surface of the guide rail, the frictional force will drive the positioning disc to rotate accordingly until the screw rod is screwed in to a predetermined value. During this rolling process, the size of the expansion joint is controllable, the force on the shielding sleeve is uniform, the deformation is uniform, and the yield of the obtained finished product is high.

Description

Technical Field

[0001] The present invention relates to the technical field of canned pumps, and particularly to a tooling for preparing an expansion joint on a stator shield sleeve. Background Art

[0002] A canned pump is a leak-free pump formed by integrating a canned motor and a pump, mainly composed of components such as a pump body, an impeller, a stator, a rotor, front and rear bearings, and a thrust disk. The stator and the rotor are respectively isolated by non-magnetic corrosion-resistant thin-walled sleeves. The rotor is supported by the front and rear bearings and immersed in the conveying medium, so there is no need for any type of dynamic seal to prevent the outward leakage of the conveyed medium. Generally speaking, a canned pump is a centrifugal seal-less pump. The canned pump is absolutely leak-free. Under the negative pressure condition inside the pump, external gas will not be inhaled, and it is especially suitable for operation in a vacuum system; at the same time, it is suitable for high-pressure, high-melting-point, high and low-temperature media. The canned pump has a compact structure, small size, and light weight; there is no cooling fan, the noise is relatively low, the application range is wide, the operation is reliable, and it can provide a relatively good working environment.

[0003] To meet the structural requirements of the stator shield sleeve of the canned pump for the thermal expansion and contraction of high-temperature metals, an expansion joint should be provided in the structure. Because its shape is similar to the English letter "Ω", it is called an Ω-ring in the industry. At present, the production of this Ω-ring is to be clamped on a machine tool and rolled with a rolling tool. During the preparation process, the clamping is cumbersome and time-consuming. More importantly, there is uneven deformation, and the sharp contact part between the flange and the shield sleeve is prone to breakage, resulting in a low yield of finished products. Summary of the Invention

[0004] The purpose of the present invention is to provide a tooling for preparing an expansion joint on a stator shield sleeve in order to overcome at least one of the defects existing in the above-mentioned prior art. This tooling is installed on the stator's stop. During use, after the screw is screwed in until the working surface contacts the conical surface of the guide rail, the frictional force will drive the positioning disk to rotate accordingly until the screw is screwed in to a predetermined value. During this rolling process, the size of the expansion joint is controllable, the force on the shield sleeve is uniform, the deformation is uniform, and the yield of the obtained finished product is high.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] A tooling for preparing an expansion joint on a stator shield sleeve includes:

[0007] Positioning disk; guide rail frame, one end of the guide rail frame passes through a through hole provided in the middle of the positioning disk and is fixedly connected to the positioning disk, and the other end is provided with a plurality of guide rails slidably connected to the guide rail frame; the working end of the guide rail is provided with a roller; the extension lines of the plurality of guide rails intersect at one point, which is the center of the positioning disk, and rotating the positioning disk will drive the rotation of the plurality of guide rails; the working end is a conical screw, and the working end of the screw is inserted into a through hole provided in the middle of the guide rail frame and is threadedly connected to the through hole in the middle of the guide rail frame; the working end of the screw is screwed into the conical surface formed by the plurality of guide rails, and the friction force will drive the positioning disk to rotate simultaneously until the screw is screwed into a predetermined value.

[0008] More specifically, the screw is provided with a scale value corresponding to the numerical value of the locus circle of the outer diameter of the roller, so that by presetting the screwing-in preset value of the screw, the locus circle of the outer diameter of the roller can be controlled to control the size of the expansion joint.

[0009] Further, a first nut for fixing the two is provided between the positioning disk and the guide rail frame.

[0010] Further, the first nut is a hexagonal nut.

[0011] Further, the tooling is also provided with an annular fixing disk, a first screw and a second screw; the fixing disk is evenly and alternately provided with through holes and grooves communicating with the inner wall of the fixing disk;

[0012] The first screw passes through the through hole provided in the fixing disk to complete the fixed connection between the fixing disk and the guide rail frame; the second screw passes through the groove provided in the fixing disk to complete the sliding connection between the fixing disk and the guide rail.

[0013] Further, the first screw and the second screw are cylindrical head screws.

[0014] Further, a spring for resetting the guide rail is provided on the fixing disk; one end of the spring is connected to the first screw, and the other end is connected to the second screw.

[0015] Further, the guide rails are evenly distributed circumferentially between the fixing disk and the guide rail frame.

[0016] Further, there are at least 3 guide rails, preferably 3.

[0017] Further, the tooling is also provided with a lever; the lever is inserted into a through hole provided radially at the non-working end of the screw, and the screw can be moved labor-savingly through the lever.

[0018] Further, a positioning pin for connecting the guide rail and the roller is provided between the guide rail and the roller.

[0019] Compared with the prior art, the present invention has the following advantages:

[0020] (1)In the present invention, after the screw advances until the working surface contacts the conical surface of the guide rail, the frictional force drives the positioning disk to follow and rotate the roller on the guide rail. At this time, the roller rolls on the rolling shield sleeve until the screw advances to a predetermined value. During this rolling process, the size of the expansion joint is controllable, the force on the shield sleeve is uniform, the deformation is uniform, and the yield rate of the finished product is high.

[0021] (2)In the present invention, the clamping and disassembling time is short, and the production efficiency is improved. Description of the Drawings

[0022] Figure 1 is a schematic diagram of the tooling for preparing the expansion joint on the stator shield sleeve in the embodiment;

[0023] Figure 2 is Figure 1 the enlarged view of area A in

[0024] Figure 3 is Figure 1 the right view of

[0025] As shown in the figure, the reference numerals are: 1-guide rail frame; 2-push rod; 3-positioning disk; 4-fixed disk; 5-positioning pin; 6-guide rail; 7-roller; 8-screw; 9-first nut; 10-first screw; 11-spring; 12-gasket; 13-second nut; 14-stator assembly; 15-second screw; 16-expansion joint; 17-shield sleeve. Detailed Embodiment

[0026] The present invention will be described in detail below with reference to the drawings and specific embodiments. This embodiment is implemented on the premise of the technical solution of the present invention, and the detailed implementation manners and specific operation processes are given, but the protection scope of the present invention is not limited to the following embodiments.

[0027] Embodiment

[0028] For details, see Figures 1-3 , a tooling for preparing the expansion joint on the stator shield sleeve, comprising:

[0029] The positioning disk 3, by rotating the positioning disk 3, can drive the rotation of the entire tooling;

[0030] The guide rail frame 1, one end of the guide rail frame 1 passes through the through hole provided in the middle of the positioning disk 3 and is fixedly connected to the positioning disk 3, that is, the fixation between the two is realized through the first nut 9 provided between the guide rail frame 1 and the positioning disk 3, and the other end is provided with three guide rails 6 slidably connected to the guide rail frame 1; the working end of the guide rail 6 is provided with a roller 7; the extension lines of the three guide rails 6 intersect at one point, which is the center of the positioning disk 3, and by rotating the positioning disk 3, the rotation of the guide rail 6 is driven;

[0031] The screw rod 8 with a conical working end is inserted into the through hole provided in the middle of the guide rail frame 1 and is threadedly connected to the through hole in the middle of the guide rail frame 1; the working end of the screw rod 8 is screwed into the area formed by a plurality of guide rails 6 to control the length of the roller 7 extending radially outwards, that is, to control the value of the outer diameter locus circle of the roller.

[0032] Specifically, in this embodiment, the screw rod 8 is provided with scale values corresponding to the value of the locus circle of the outer diameter of the roller 7, so that by presetting the screwing-in preset value of the screw rod 8, the locus circle of the outer diameter of the roller 7 can be controlled to control the size of the expansion joint.

[0033] Please refer to Figure 1 、 2 , in this embodiment, the tooling is further provided with an annular fixing plate 4, a first screw 10 and a second screw 15; the fixing plate 4 is evenly and alternately provided with through holes and grooves communicating with the inner wall of the fixing plate 4; the first screw 10 passes through the through hole provided in the fixing plate 4 to complete the fixed connection between the fixing plate 4 and the guide rail frame 1; the second screw 15 passes through the groove provided in the fixing plate 4 to complete the sliding connection between the fixing plate 4 and the guide rail 6, wherein the first screw 10 and the second screw 15 are cylindrical head screws. There are three guide rails 6 evenly distributed circumferentially between the fixing plate 4 and the guide rail frame 1. The fixing plate 4 is provided with a spring 11 for resetting the guide rail 6; one end of the spring 11 is connected to the first screw 10 and the other end is connected to the second screw 15.

[0034] Please refer to Figure 1 , in this embodiment, in order to move the screw rod 8 labor-saving, a lever 2 is further provided in this embodiment; the lever 2 is inserted into the through hole provided radially in the non-working end of the screw rod 8. A positioning pin 5 for connecting the guide rail 6 and the roller 7 is provided between the guide rail 6 and the roller 7.

[0035] Working principle:

[0036] First, the positioning disk 3 is fixed, and the lever 1 is rotated to measure the value of the locus circle of the outer diameter of the roller 7 at different positions, and record the corresponding relationship between the diameter value of the locus circle and the scale value on the lever 2.

[0037] Then, the positioning disk 3 of the tooling in this embodiment is installed in the stator stop of the stator assembly 14, and a gasket 12 is provided between the positioning disk 3 and the stop, see Figure 1 、 2Twist the lever 2, and the screw rod 8 will push the guide rail 6, and then push the roller 7 to squeeze the shielding sleeve 17. That is to say, when the working surface of the screw rod 8 contacts the conical surface of the guide rail 6, the frictional force drives the positioning disk 3 to rotate, and then drives the rotation of the roller 7. When the pressure of the roller 7 causes local circumferential micro-deformation of the shielding sleeve 17, the screw rod 8 will continue to advance. Continuously rotate the lever 2, and the shielding sleeve 17 continuously undergoes micro-deformation under the rotational pressure of the roller 7, and finally forms the expansion joint 16. When the advancement of the screw rod 8 reaches a predetermined value, stop rotating, the positioning disk 3 does not move, reverse-rotate the lever 2, and the locus circle of the outer diameter of the roller 7 will decrease under the pulling force of the spring 11. Remove this tooling, and the rolling production of the expansion joint 16 is completed.

[0038] The above is only a preferred embodiment of the present invention, and it is not a limitation of the present invention in other forms. Any person skilled in the art may use the disclosed technical content to make changes or modifications into equivalent embodiments with equivalent changes. However, any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present invention without departing from the technical solution content of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. A tooling for preparing expansion joints on a stator shield, characterized in that, Comprising: Positioning disk (3); Guide rail frame (1), one end of the guide rail frame (1) passes through a through hole provided in the middle of the positioning disk (3) and is fixedly connected to the positioning disk (3), and the other end is provided with a plurality of guide rails (6) slidably connected to the guide rail frame (1); a roller (7) is provided at the working end of the guide rail (6); the extension lines of the plurality of guide rails (6) intersect at the center of the positioning disk (3), and by rotating the positioning disk (3), the plurality of guide rails (6) are driven to rotate; A screw rod (8) with a conical working end, the working end of the screw rod (8) is inserted into a through hole provided in the middle of the guide rail frame (1) and is threadedly connected to the through hole in the middle of the guide rail frame (1); a scale value corresponding to the value of the locus circle of the outer diameter of the roller (7) is provided on the screw rod (8), so that by presetting the screwing-in preset value of the screw rod (8), the locus circle of the outer diameter of the roller (7) can be controlled to control the size of the expansion joint.

2. The tooling for preparing the expansion joint on the stator shielding sleeve according to claim 1, characterized in that, A first nut (9) for fixing the two is provided between the positioning disk (3) and the guide rail frame (1).

3. The tooling for preparing the expansion joint on the stator shield according to claim 2, characterized in that The first nut (9) is a hexagonal nut.

4. A tooling for manufacturing an expansion joint on a stator shield, as claimed in claim 1, wherein, The tooling further comprises an annular fixing disk (4), a first screw (10) and a second screw (15); the fixing disk (4) is evenly and alternately provided with through holes and grooves communicating with the inner wall of the fixing disk (4); The first screw (10) passes through the through hole provided in the fixing disk (4) to complete the fixed connection between the fixing disk (4) and the guide rail frame (1); The second screw (15) passes through the groove provided in the fixing disk (4) to complete the sliding connection between the fixing disk (4) and the guide rail (6).

5. A tooling for manufacturing an expansion joint on a stator shield, according to claim 4, wherein The first screw (10) and the second screw (15) are cylinder head screws.

6. A tool for preparing an expansion joint on a stator shield according to claim 4, characterized in that, A spring (11) for resetting the guide rail (6) is provided on the fixing disk (4); one end of the spring (11) is connected to the first screw (10), and the other end is connected to the second screw (15).

7. A tool for preparing an expansion joint on a stator shield according to claim 4, characterized in that, The guide rails (6) are evenly distributed circumferentially between the fixing disk (4) and the guide rail frame (1).

8. A tooling for preparing an expansion joint on a stator shield according to claim 1, characterized in that, There are at least 3 guide rails (6).

9. A tool for preparing an expansion joint on a stator shielding sleeve according to claim 1, characterized in that, The tooling further comprises a lever (2); the lever (2) is inserted into a through hole provided radially at the non-working end of the screw rod (8).

10. The tooling for preparing the expansion joint on the stator shield according to claim 1, characterized in that, A positioning pin (5) for connecting the guide rail (6) and the roller (7) is provided between the guide rail (6) and the roller (7).

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