CN219865602U - Pump cover of centrifugal pump - Google Patents
Pump cover of centrifugal pump Download PDFInfo
- Publication number
- CN219865602U CN219865602U CN202222962488.9U CN202222962488U CN219865602U CN 219865602 U CN219865602 U CN 219865602U CN 202222962488 U CN202222962488 U CN 202222962488U CN 219865602 U CN219865602 U CN 219865602U
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- CN
- China
- Prior art keywords
- pump cover
- plastic
- neck section
- centrifugal pump
- metal framework
- Prior art date
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- 239000004033 plastic Substances 0.000 claims abstract description 61
- 229920003023 plastic Polymers 0.000 claims abstract description 61
- 239000002184 metal Substances 0.000 claims abstract description 44
- 239000004699 Ultra-high molecular weight polyethylene Substances 0.000 claims description 4
- 229920000785 ultra high molecular weight polyethylene Polymers 0.000 claims description 4
- 229920001971 elastomer Polymers 0.000 claims description 3
- 229920006351 engineering plastic Polymers 0.000 claims description 3
- 239000011347 resin Substances 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims description 3
- 239000005060 rubber Substances 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
- 238000000465 moulding Methods 0.000 abstract description 6
- 238000001125 extrusion Methods 0.000 abstract description 5
- 230000005484 gravity Effects 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 4
- 238000005336 cracking Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 229910000975 Carbon steel Inorganic materials 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 3
- 239000010962 carbon steel Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000000748 compression moulding Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model discloses a centrifugal pump cover which comprises a metal framework, wherein a central hole is formed in the center of the metal framework, and a lining plastic body is arranged on the inner side wall of the central hole. According to the utility model, the metal framework can increase the mechanical strength of stretching and extrusion resistance of the axis of the plastic pump cover, so that the plastic pump cover cannot generate damage effects such as stretch cracking, deformation and the like on the centrifugal pump due to the axial stress of the conveying pipeline and the gravity of the pipeline; the lining plastic body is injected in the metal framework, so that the pressure bearing capacity of the plastic body in the lining plastic pump cover during hot molding can be improved, the pressure of the mold cavity can be improved, and the wear resistance of the pump cover can be further improved.
Description
Technical Field
The utility model relates to the field of pump covers, in particular to a centrifugal pump cover.
Background
The pump cover, impeller and pump shell of the centrifugal pump made of ultra-high molecular weight polyethylene are materials used for manufacturing the centrifugal pump commonly in the industry, and the centrifugal pump manufactured by the materials is not only corrosion-resistant, but also wear-resistant. And thus are widely used as a transfer centrifugal pump for transferring slurry in the industrial field.
The pump cover of the centrifugal pump has two common manufacturing methods: one is a steel lined plastic pump cap (as in figure 1); one is an all-plastic pump cover (as in fig. 2), i.e., the pump cover is of plastic construction as a whole. The advantages and disadvantages of the two pump covers are as follows: the plastic-lined pump cover has the advantages of good mechanical strength, and no damage faults such as deformation, stretch crack and the like caused by the influence of expansion or contraction force generated by heat expansion and cold contraction of the pipeline after the pump cover 1 is connected with a pump liquid conveying pipeline. However, the plastic-lined pump cover has the major defects of not resisting abrasion, the reason of not resisting abrasion is that the pressure is insufficient during the compression molding of the pump cover, the reason of insufficient pressure is that the pressure is not increased due to the shape and structure of the pump cover and the bearing pressure difference of the metal shell, so that the pressure of the molding press cannot be increased, the pressure can be generally controlled to be between 0.8 and 1.6MPa, the density of the plastic matrix of the pump cover is insufficient due to insufficient pressure, and the abrasion resistance is further poor.
The other kind of centrifugal pump cover is the pump cover of plastic construction, and the advantage of plastic pump cover is that the wearability is good, because the plastic pump cover does not have the worry that the pressurization of lining plastic metal casing was exploded, mould pressure can be pressurized to 6-10 MPa during the hot briquetting for the plastic tissue of plastic pump cover is closely knit, and wearability is also fine because the pressure is high. However, the plastic pump cover has a disadvantage that the axial stretching force and the extrusion force are poor, and particularly after the pump is provided with a metal pipeline, the plastic pump cover is easy to deform and crack under the action of gravity, heat and axial mechanical force, so that the pump is damaged.
Disclosure of Invention
The utility model aims to provide a pump cover of a centrifugal pump.
The innovation point of the utility model is that the metal framework can increase the mechanical strength of the axial line of the plastic pump cover for stretching and extrusion resistance, so that the plastic pump cover can not generate damage effects such as pulling crack, deformation and the like to the centrifugal pump due to the axial stress of the conveying pipeline and the gravity of the pipeline; the lining plastic body is injected in the metal framework, so that the pressure bearing capacity of the plastic body in the lining plastic pump cover during hot molding can be improved, the pressure of the mold cavity can be improved, and the wear resistance of the pump cover can be further improved.
In order to achieve the above purpose, the technical scheme of the utility model is as follows:
the utility model provides a centrifugal pump cover, includes metal skeleton, metal skeleton's center is equipped with the centre bore, be equipped with on the inside wall in centre bore and line the plastic body. The metal framework can increase the mechanical strength of stretching and extrusion resistance of the axis of the plastic pump cover, so that the plastic pump cover cannot generate damage effects such as cracking, deformation and the like on the centrifugal pump due to the axial stress of the conveying pipeline and the gravity of the pipeline; the plastic lining body is injected into the metal framework, so that the pressure bearing capacity of the plastic body in the plastic lining pump cover during hot molding can be improved, and compared with the manufacturing process of the plastic lining pump cover in the prior art, the pressure of a die cavity can be improved by 1-2 times, and the pressure of the plastic die cavity can be improved to 3-4 MPa from about 1.3MPa, so that the wear resistance of the pump cover is improved; the lining plastic body covers the overflow part of the whole neck section, no metal body is exposed, and the anti-corrosion performance of the centrifugal pump is improved. And (3) manufacturing a metal carbon steel plate for the metal framework, cutting the metal carbon steel plate into a required section, and then fixing and welding the required metal framework by using a clamp, or casting and forming the metal carbon steel plate by using a metal die.
Preferably, the neck section is arranged on the metal framework, a plurality of ribs are uniformly distributed on the outer circumference of the neck section at intervals, each rib is arranged along the radial direction of the neck section, a cavity is formed between every two adjacent ribs, a plurality of through holes are formed in the circumferential direction of the neck section, the through holes are communicated with the cavity and the central hole, and the lining plastic body extends into each through hole. The ribs can improve the strength of the neck section; when the pump cover is formed by compression molding, the plastic which is convenient to melt enters the central hole through the cavity and the through hole of the metal framework, so that the pressure of the inner cavity of the die can be increased, the lining plastic body of the pump cover is formed under high pressure, the compactness of the lining plastic body of the pump cover is increased, and the wear resistance of the pump cover is further improved.
Preferably, the lining plastic body is made of one of ultra-high molecular weight polyethylene, engineering plastic, resin and rubber.
Preferably, one end of the metal framework is provided with a matrix, and one side of the matrix far away from the metal framework is provided with a protruding part arranged in the lining plastic body. The convex part can further increase the contact area of the metal framework and the lining plastic body, and improve the connection strength and connection stability of the metal framework and the lining plastic body; further enhances the strength of the lining plastic body and ensures that the lining plastic body is not easy to deform.
Preferably, the protruding portion is a convex ring or a convex strip.
Preferably, the substrate is provided with a plurality of lightening holes. The central hole, the weight reducing hole and the like arranged on the metal framework can reduce the material consumption of the metal material, further reduce the manufacturing cost of the pump cover, and compared with the metal plastic-lined pump cover in the prior art, the material consumption can be reduced by 50 percent, the installation strength is similar to that of the metal plastic-lined pump cover, the wear resistance of the pump cover is greatly improved compared with that of the metal plastic-lined pump cover, and the improvement range is about 60 to 100 percent; and the bonding strength of the metal framework and the lining plastic body is further increased, so that the overall mechanical performance of the pump cover is further improved.
Preferably, one end of the metal framework, which is far away from the base body, is integrally formed with a pump cover flange, and the pump cover flange is connected with the pump body.
Preferably, one end of the metal framework far away from the base body is provided with a looper flange, the looper flange is provided with a pump cover flange, and the pump cover flange is connected with the pump body.
The beneficial effects of the utility model are as follows:
1. the metal framework can increase the mechanical strength of stretching and extrusion resistance of the axis of the plastic pump cover, so that the plastic pump cover cannot generate damage effects such as cracking, deformation and the like on the centrifugal pump due to the axial stress of the conveying pipeline and the gravity of the pipeline; the lining plastic body is injected in the metal framework, so that the pressure bearing capacity of the plastic body in the lining plastic pump cover during hot molding can be improved, the pressure of the mold cavity can be improved, and the wear resistance of the pump cover can be further improved.
2. The plastic convenient to melt enters the neck section, the connection strength of the metal framework and the lining plastic body is increased, the compactness of the lining plastic body of the pump cover is increased, and the wear resistance of the pump cover is further increased.
Drawings
Fig. 1 is a schematic structural view of a steel lined molded pump cap of the prior art.
Fig. 2 is a schematic structural view of a prior art all plastic pump cap.
Fig. 3 is a schematic structural diagram of embodiment 1.
Fig. 4 is a schematic view of the structure of the cavity and the through hole.
Fig. 5 is a schematic structural view of the rib.
Fig. 6 is a schematic structural diagram of embodiment 2.
Fig. 7 is a schematic structural diagram of embodiment 3.
In the figure:
1. a metal skeleton; 2. a neck section; 21. a through hole; 22. a central bore; 3. lining a plastic body; 4. ribs; 41. a cavity; 5. a base; 51. a lightening hole; 6. a boss; 7. a pump cover flange; 8. a looper flange; 9. a pump cover; 10. and fastening the compression ring.
Detailed Description
The technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings.
The described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Example 1
As shown in fig. 3, 4 and 5, a pump cover of a centrifugal pump comprises a metal framework 1, wherein a neck section 2 is arranged on the metal framework 1, a central hole 22 is arranged in the center of the neck section 2, a lining plastic body 3 is arranged on the inner side wall of the central hole 22, and the lining plastic body 3 is made of one of ultra-high molecular weight polyethylene, engineering plastic, resin and rubber. The outer circumference of the neck section 2 is uniformly and alternately provided with a plurality of ribs 4, each rib 4 is arranged along the radial direction of the metal framework 1, a cavity 41 is formed between every two adjacent ribs 4, a plurality of through holes 21 are arranged in the circumferential direction of the neck section 2, each through hole 21 is used for respectively communicating the cavity 41 with the central hole 22, and the lining plastic body 3 extends into each through hole 21.
As shown in fig. 3, one end of the neck section 2 is integrally formed with a pump cap flange 7, and the pump cap flange 7 is connected with the pump body through bolts. The one end that keeps away from pump cover flange 7 of neck section 2 is equipped with base member 5, is equipped with a plurality of lightening holes 51 on the base member 5, and the fastening clamping ring 10 of centrifugal pump passes through the fix with screw on the pump cover 9 of centrifugal pump, and base member 5 centre gripping is between fastening clamping ring 10 and pump cover 9, and the one end that the base member 5 kept away from metal skeleton 1 is equipped with the bellying 6 of arranging in lining in moulding body 3, and bellying 6 can be the bulge loop, also can be the sand grip.
Example 2
As shown in fig. 6, the difference from embodiment 1 is that the end of the neck section 2 remote from the base body 5 is provided with a looper flange 8, the looper flange 8 is provided with a pump cap flange 7, and the pump cap flange 7 is connected with the pump body by bolts.
Example 3
As shown in fig. 7, the difference from embodiment 1 is that the base body 5 is fixed to the pump cover 9 of the centrifugal pump by screws.
The described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Claims (7)
1. A centrifugal pump cover is characterized in that,
the plastic lining structure comprises a metal framework, wherein a central hole is formed in the center of the metal framework, and a plastic lining body is arranged on the inner side wall of the central hole;
the metal framework is provided with a neck section, a plurality of ribs are uniformly distributed on the outer circumference of the neck section at intervals, each rib is arranged along the radial direction of the neck section, a cavity is formed between every two adjacent ribs, a plurality of through holes are formed in the circumferential direction of the neck section, the through holes are communicated with the cavity and the central hole, and the lining plastic body extends into each through hole.
2. The centrifugal pump cover according to claim 1, wherein,
the lining plastic body is made of one of ultra-high molecular weight polyethylene, engineering plastic, resin and rubber.
3. The centrifugal pump cover according to claim 2, wherein,
one end of the neck section is provided with a base body, and one side of the base body far away from the neck section is provided with a protruding part arranged in the lining plastic body.
4. A centrifugal pump cover according to claim 3, wherein,
the convex part is a convex ring or a convex strip.
5. A centrifugal pump cover according to claim 3, wherein,
the base body is provided with a plurality of lightening holes.
6. The centrifugal pump cover according to claim 5, wherein,
one end of the neck section, which is far away from the base body, is integrally formed with a pump cover flange, and the pump cover flange is connected with the pump body.
7. A centrifugal pump cover according to claim 3, wherein,
the neck section is kept away from the one end of base member and is equipped with the looper flange, be equipped with the pump cover flange on the looper flange, pump cover flange and pump body coupling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222962488.9U CN219865602U (en) | 2022-11-07 | 2022-11-07 | Pump cover of centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222962488.9U CN219865602U (en) | 2022-11-07 | 2022-11-07 | Pump cover of centrifugal pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219865602U true CN219865602U (en) | 2023-10-20 |
Family
ID=88344913
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222962488.9U Active CN219865602U (en) | 2022-11-07 | 2022-11-07 | Pump cover of centrifugal pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219865602U (en) |
-
2022
- 2022-11-07 CN CN202222962488.9U patent/CN219865602U/en active Active
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