Guide vane body with diffusion horn tube structure and vertical circulating pump comprising guide vane body
The manufacturing of the guide vane body with diffusion horn tube structure through spin forming and welding technology is solved, and the defects and sealing problems in the manufacturing process of the guide vane body are improved, the shape accuracy and operating stability of the guide vane body are reduced, and the mold cost is reduced and production preparation time, improving hydraulic performance and sealing.
Patent Information
- Application Number
- CN202420018752.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-04
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2034-01-04
AI Technical Summary
During the manufacturing process, the existing guide vane body has casting defects, the flow path wall surface is not smooth, the mold cost is high, and the operation efficiency is low. The poor sealing of the steel plate welded parts leads to an increase in leakage, affecting the operation stability of the circulation pump. .
The guide vane body with diffusion horn tube structure is manufactured by spin forming and welding technology. Through the combination of outer straight cylinder, inner straight cylinder, diffusion horn conical tube and shrink inner conical tube, the positioning sealing disc and axial sealing ring are added to form a high The structure of the guide vane body with good accuracy and sealability.
Improve the shape accuracy and surface quality of the guide vane body, reduce mold cost and production preparation time, improve the hydraulic performance of the outlet flow channel, enhance the neutrality and operating stability of the guide vane body, and reduce leakage and traversal. , improves assembly efficiency.
Smart Images
Figure CN222185218U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of mechanical engineering pumps, and in particular relates to a guide vane body with a diffusion trumpet tube structure and a vertical circulation pump comprising the guide vane body. Background Art
[0002] In the prior art, the guide vane body is an important hydraulic element in a vertical circulation pump, which plays a role in guiding flow in the vertical pump. The guide vane body is provided with an inner cylinder and an outer cylinder, and connecting flanges are provided at both ends of the guide vane body, wherein a guide vane is provided between the inner cylinder and the outer cylinder to form a flow channel for the fluid to pass through. There are two main methods for manufacturing the blanks of some large guide vanes: one is to use integral casting, and the other is to use steel plate welded parts to splice. The blank is formed into a final part after processes such as manufacturing, machining, and surface treatment.
[0003] The integrally cast guide vane body has the disadvantages of many casting defects and an uneven surface of the flow channel wall. It takes a lot of time to weld the defects and polish the surface of the flow channel wall. At the same time, the yield rate of the cone-mouth thin-wall casting of the guide vane body outlet trumpet tube is extremely low, and the welding ring with large defects will cause the guide vane body to deform. In addition, the integrally cast guide vane body requires pre-production of a large mold, and the mold cost is also relatively high.
[0004] The inner or outer cylinder of the guide vane body made of steel plate welded parts is formed by prefabricating the steel plate into several sections of tapered cylinders of different sizes, and then butt-welding several sections of tapered cylinders to form an inner or outer cylinder with an approximately arc-shaped surface, and the outlet of the outer cylinder is a straight tube round shape. In addition, the outer cylinder and the inner hole of the pump cylinder are gap-sealed. Affected by the corrosiveness of the conveying medium, when the gap between the outer cylinder of the guide vane body and the inner hole of the pump cylinder increases, the conveying medium will have high-pressure and low-pressure areas and the leakage will increase sharply, reducing the volumetric efficiency of the circulating pump and causing the pump to operate less efficiently. Utility Model Content
[0005] The utility model aims at the above-mentioned problems, makes up for the deficiencies of the prior art, and provides a guide vane body with a diffusion trumpet tube structure and a vertical circulation pump including the same; compared with the prior art, the utility model can improve the centering and operating stability of the guide vane body, improve the shape accuracy of the flow channel, improve the hydraulic performance of the water outlet flow channel, reduce mold costs, and shorten production preparation time.
[0006] To achieve the above purpose, the utility model adopts the following technical solutions.
[0007] The utility model provides a guide vane body with a diffuser trumpet tube structure, characterized in that it comprises an outer straight cylinder, one end of the outer straight cylinder is provided with a large flange, the other end of the outer straight cylinder is connected to a diffuser trumpet cone tube, an inner straight cylinder is provided inside the outer straight cylinder, the outer straight cylinder and the inner straight cylinder are connected by a plurality of guide vanes, one end of the inner straight cylinder is provided with an inner flange, the other end of the inner straight cylinder is connected to a contraction inner cone tube, a small flange is provided at the end of the contraction inner cone tube, an inner sleeve is provided inside the inner straight cylinder, the inner sleeve and the inner straight cylinder are connected by a bottom plate, a positioning sealing disc is provided on the outer wall of the outer straight cylinder, an annular sealing groove is provided on the outer circle of the positioning sealing disc, and an axial sealing ring is provided in the annular sealing groove.
[0008] Furthermore, a plurality of small ribs are connected between the bottom of the base plate and the inner straight tube, and a plurality of large ribs are connected between the top of the base plate, the inner sleeve, the inner straight tube and the shrinking inner cone tube.
[0009] Furthermore, the outer straight tube and the diffusion horn cone tube are formed by spin forming and welded into one body.
[0010] Furthermore, the inner straight tube and the shrinking inner cone tube are formed by spin forming and welded into one body.
[0011] Furthermore, a lifting lug is provided on the diffusion horn cone.
[0012] The utility model also provides a vertical circulation pump, comprising any one of the above-mentioned guide vane bodies, and also comprising an outer cylinder, the guide vane body is arranged inside the outer cylinder, an impeller chamber is arranged at the inner bottom of the outer cylinder, the large flange of the guide vane body is connected to the impeller chamber, the small flange of the guide vane body is connected to an inner pipe, the top of the outer cylinder is connected to a discharge elbow, the top of the discharge elbow is connected to an intermediate connecting seat, the top of the intermediate connecting seat is connected to a guide grid, the top of the inner pipe is connected to the guide grid, a main shaft with a sleeve coupling is arranged in the inner pipe, the middle part of the main shaft is connected to a bearing bracket connected to the outer cylinder through a bearing, the main shaft passes through the inner sleeve of the guide vane body and extends to the impeller chamber, and the main shaft is connected to a main impeller in the impeller chamber.
[0013] Furthermore, the axial sealing ring contacts and is clearance-fitted with an inner processed portion of the outer cylinder.
[0014] Furthermore, a suction bell pipe is connected to the outer side of the bottom of the outer cylinder.
[0015] The beneficial effects of the utility model.
[0016] The utility model forms a guide vane body and a guide vane flow channel of a welded structure by adopting a spin-formed outer straight cylinder, a spin-formed diffusion horn cone tube, a spin-formed inner straight cylinder and a spin-formed inner cone tube; compared with the cast guide vane body or the conical cylinder spliced guide vane body in the prior art, on the one hand, the shape accuracy and surface quality of the flow channel are improved, and on the other hand, compared with the cast guide vane body, the mold cost and production preparation time can be reduced; the setting of the outlet extension of the diffusion horn cone tube structure further improves the hydraulic performance of the water outlet flow channel; the axial sealing ring can axially seal and block the external fluid of the guide vane body from channeling and leakage, improve the assembly efficiency, and improve the accuracy of the guide vane body installation position, thereby improving the centering and operation stability of the guide vane body. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to make the technical problems, technical solutions and beneficial effects solved by the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the specific implementation methods described here are only used to explain the utility model and are not used to limit the utility model.
[0018] Figure 1 It is a structural schematic diagram of a vertical circulation pump of the utility model.
[0019] Figure 2 It is a structural schematic diagram of the guide vane body of the utility model.
[0020] Markings in the figure: 1 is the suction horn pipe, 2 is the impeller chamber, 3 is the main impeller, 4 is the axial sealing ring, 5 is the guide vane body, 6 is the outer cylinder body, 7 is the main shaft ring, 8 is the bearing bracket, 9 is the sleeve coupling, 10 is the inner pipe, 11 is the discharge elbow, 12 is the intermediate connecting seat, 13 is the guide grid, 14 is the outer straight cylinder, 15 is the inner straight cylinder, 16 is the diffusion horn cone tube, 17 is the contraction inner cone tube, 18 is the guide vane, 19 is the large flange, 20 is the positioning sealing disc, 21 is the annular sealing groove, 22 is the small flange, 23 is the inner flange, 24 is the inner sleeve, 25 is the bottom plate, 26 is the large rib plate, 27 is the small rib plate, and 28 is the lifting ear. DETAILED DESCRIPTION
[0021] As shown in the accompanying drawings, this embodiment provides a guide vane body with a diffusion horn tube structure, including an outer straight cylinder 14, a large flange 19 is provided at the water inlet end of the outer straight cylinder 14, and a diffusion horn cone tube 16 is connected to the water outlet end of the outer straight cylinder 14. The outer straight cylinder 14 and the diffusion horn cone tube 16 are spin-formed and welded into one.
[0022] An inner straight cylinder 15 is disposed inside the outer straight cylinder 14 . The outer straight cylinder 14 and the inner straight cylinder 15 are connected by welding a plurality of guide vanes 18 . The guide vanes 18 are made by spin forming.
[0023] An inner flange 23 is provided at the water inlet end of the inner straight cylinder 15, and a shrinking inner cone tube 17 is connected to the water outlet end of the inner straight cylinder 15. A small flange 22 is provided at the end of the shrinking inner cone tube 17. The inner straight cylinder 15 and the shrinking inner cone tube 17 are formed by spin forming and welded into one body.
[0024] An inner sleeve 24 is provided inside the inner straight cylinder 15, and the inner sleeve 24 and the inner straight cylinder 15 are connected via a bottom plate 25. A positioning sealing disc 20 for increasing strength is provided on the outer wall of the outer straight cylinder 14, and an annular sealing groove 21 is provided on the outer circle of the positioning sealing disc 20, which can be formed by CNC machining. An axial sealing ring 4 is provided in the annular sealing groove 21, which can prevent the fluid from communicating and leaking outside the guide vane body 5, improve assembly efficiency, and improve the accuracy of the installation position of the guide vane body 5, thereby improving the centering and operation stability of the guide vane body 5.
[0025] In order to improve the strength, a plurality of small ribs 27 are connected between the bottom of the bottom plate 25 and the inner straight tube 15 , and a plurality of large ribs 26 are connected between the top of the bottom plate 25 , the inner sleeve 24 , the inner straight tube 15 and the shrinking inner cone tube 17 .
[0026] The outer straight tube 14, the diffuser trumpet cone tube 16, the inner straight tube 15, the contraction inner cone tube 17, the guide vane 18, the large flange 19, the small flange 22 and the inner flange 23 are welded to form a flow passage. The water outlet section is extended by the diffuser trumpet cone tube 16, so that the hydraulic performance of the water outlet flow channel can be improved.
[0027] A lifting lug 28 is provided on the diffusion horn cone 16 to facilitate the lifting and disassembly of the guide vane body 5.
[0028] The present embodiment also provides a vertical circulation pump, comprising the above-mentioned guide vane body 5, and also comprising an outer cylinder body 6, the guide vane body 5 is arranged inside the outer cylinder body 6, an impeller chamber 2 is arranged at the bottom of the outer cylinder body 6, the large flange 19 of the guide vane body 5 is connected to the impeller chamber 2, the small flange 22 of the guide vane body 5 is connected to the inner pipe 10, the top of the outer cylinder body 6 is connected to the discharge elbow 11, the top of the discharge elbow 11 is connected to the middle connecting seat 12, the top of the middle connecting seat 12 is connected to the guide grid 13, the top of the inner pipe 10 is connected to the guide grid 13, a main shaft with a sleeve coupling 9 is arranged in the inner pipe 10, the middle part of the main shaft is connected to the bearing bracket 8 connected to the outer cylinder body 6 through a bearing, the main shaft passes through the inner sleeve 24 of the guide vane body 5 and extends into the impeller chamber 2, the main shaft is connected to the main impeller 3 in the impeller chamber 2, and the outer side of the bottom of the outer cylinder body 6 is connected to the suction bell pipe 1.
[0029] The axial sealing ring 4 contacts and has clearance fit with the inner processed part of the outer cylinder 6 , ensuring that the external fluid of the guide vane body 5 can be blocked from passing through and leaking.
[0030] It can be understood that the above specific description of the utility model is only used to illustrate the utility model and is not limited to the technical solution described in the implementation mode of the utility model. Ordinary technicians in the field should understand that the utility model can still be modified or replaced by equivalents to achieve the same technical effect; as long as the use requirements are met, they are within the protection scope of the utility model.
Claims
1. A guide vane body with a diffuser trumpet tube structure, characterized in that: The invention comprises an outer straight cylinder (14), one end of which is provided with a large flange (19), the other end of which is connected to a diffusion horn cone tube (16), an inner straight cylinder (15) is provided inside the outer straight cylinder (14), the outer straight cylinder (14) and the inner straight cylinder (15) are connected via a plurality of guide vanes (18), one end of the inner straight cylinder (15) is provided with an inner flange (23), and the other end of the inner straight cylinder (15) is connected to a contraction inner cone tube (23). The shrinking inner cone tube (17) is provided with a small flange (22) at the end thereof, an inner sleeve (24) is provided inside the inner straight tube (15), the inner sleeve (24) and the inner straight tube (15) are connected via a bottom plate (25), a positioning sealing disc (20) is provided on the outer wall of the outer straight tube (14), an annular sealing groove (21) is provided on the outer circle of the positioning sealing disc (20), and an axial sealing ring (4) is provided inside the annular sealing groove (21).
2. The guide vane body with a diffuser trumpet tube structure according to claim 1, characterized in that: A plurality of small ribs (27) are connected between the bottom of the bottom plate (25) and the inner straight tube (15), and a plurality of large ribs (26) are connected between the top of the bottom plate (25), the inner sleeve (24), the inner straight tube (15) and the shrinking inner cone tube (17).
3. The guide vane body with a diffuser trumpet tube structure according to claim 1, characterized in that: The outer straight tube (14) and the diffusion horn cone tube (16) are formed by spin forming and welded into one body.
4. The guide vane body with a diffuser trumpet tube structure according to claim 1, characterized in that: The inner straight tube (15) and the shrinking inner cone tube (17) are formed by spin forming and welded into one body.
5. The guide vane body with a diffuser trumpet tube structure according to claim 1, characterized in that: The diffusion horn cone (16) is provided with a lifting lug (28).
6. A vertical circulation pump, characterized in that: The invention comprises a guide vane body according to any one of claims 1 to 5, and further comprises an outer cylinder (6), wherein the guide vane body (5) is arranged inside the outer cylinder (6), an impeller chamber (2) is arranged at the inner bottom of the outer cylinder (6), the large flange (19) of the guide vane body (5) is connected to the impeller chamber (2), the small flange (22) of the guide vane body (5) is connected to the inner pipe (10), the top of the outer cylinder (6) is connected to a discharge elbow (11), and the top of the discharge elbow (11) is connected to an intermediate connecting seat ( 12), a guide fence (13) is connected to the top of the intermediate connecting seat (12), the top of the inner pipe (10) is connected to the guide fence (13), a main shaft with a sleeve coupling (9) is arranged in the inner pipe (10), the middle part of the main shaft is connected to a bearing bracket (8) connected to the outer cylinder (6) through a bearing, the main shaft passes through the inner sleeve (24) of the guide vane body (5) and extends into the impeller chamber (2), and the main shaft is connected to the main impeller (3) in the impeller chamber (2).
7. A vertical circulation pump according to claim 6, characterized in that: The axial sealing ring (4) contacts and is clearance-fitted with an inner processed portion of the outer cylinder (6).
8. A vertical circulation pump according to claim 6, characterized in that: The outer side of the bottom of the outer cylinder (6) is connected to a suction bell pipe (1).