CN114576172A - Horizontal middle-open type double-shell high-lift multistage slurry pump - Google Patents
Horizontal middle-open type double-shell high-lift multistage slurry pump Download PDFInfo
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- CN114576172A CN114576172A CN202210356091.7A CN202210356091A CN114576172A CN 114576172 A CN114576172 A CN 114576172A CN 202210356091 A CN202210356091 A CN 202210356091A CN 114576172 A CN114576172 A CN 114576172A
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- 239000002002 slurry Substances 0.000 title claims abstract description 26
- 238000007789 sealing Methods 0.000 claims abstract description 35
- 238000003780 insertion Methods 0.000 claims description 24
- 230000037431 insertion Effects 0.000 claims description 24
- 210000004907 gland Anatomy 0.000 claims description 13
- 230000007704 transition Effects 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 238000005192 partition Methods 0.000 claims description 7
- 238000012856 packing Methods 0.000 claims description 6
- 239000000919 ceramic Substances 0.000 claims description 5
- 230000000630 rising effect Effects 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims description 3
- 230000008676 import Effects 0.000 claims 1
- 230000013011 mating Effects 0.000 claims 1
- 239000003245 coal Substances 0.000 abstract description 21
- 239000003250 coal slurry Substances 0.000 abstract description 6
- 239000007788 liquid Substances 0.000 description 10
- 239000011521 glass Substances 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 229910000990 Ni alloy Inorganic materials 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005272 metallurgy Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D1/06—Multi-stage pumps
- F04D1/08—Multi-stage pumps the stages being situated concentrically
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/02—Selection of particular materials
- F04D29/026—Selection of particular materials especially adapted for liquid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/24—Vanes
- F04D29/242—Geometry, shape
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/44—Fluid-guiding means, e.g. diffusers
- F04D29/445—Fluid-guiding means, e.g. diffusers especially adapted for liquid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/60—Mounting; Assembling; Disassembling
- F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
- F04D29/628—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for liquid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D7/00—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
- F04D7/02—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type
- F04D7/04—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogenous
- F04D7/045—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogenous with means for comminuting, mixing stirring or otherwise treating
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention provides a horizontal middle-open type double-shell high-lift multistage slurry pump, which relates to the technical field of coal slime medium pumpsA first-stage volute and a second-stage volute are installed, and a first-stage sealing ring and a second-stage sealing ring are fixedly installed at inner holes of the first-stage volute and the second-stage volute respectively; the single-stage flow of the coal slime medium pump is 300m3H, the lift is 80m, and the flow of the whole pump unit is 300m3The pump head reaches 160m, so that the high flow rate and the high pump head of the coal slurry medium pump are realized, the interstage leakage and the volume loss of the coal slurry medium pump are reduced, and the efficiency of the whole pump unit is improved.
Description
Technical Field
The invention relates to the technical field of coal slime medium pumps, in particular to a horizontal open-center double-shell high-lift multistage slurry pump.
Background
The coal slime medium pump is a centrifugal pump for conveying solid-liquid mixed media, is widely applied to the fields of industries such as mines, electric power, metallurgy, coal, environmental protection and the like, and is used for conveying abrasive solid-liquid mixed media, such as coal slurry or heavy media of a coal washing plant, coal mine goaf filling slurry, ore slurry conveying of a metallurgy ore dressing plant and the like. The working principle of the coal slime medium pump is that under the action of centrifugal force, a solid-liquid mixed medium is thrown from the center of an impeller to the outer edge to obtain energy, leaves the outer edge of the impeller at a high speed and enters a volute pump shell, then the solid-liquid mixed medium is gradually decelerated in a runner of the volute pump shell to convert part of kinetic energy of the solid-liquid mixed medium into static pressure energy, and finally flows into a discharge pipeline at a higher pressure and is sent to a required place.
The prior commonly used coal slime medium pump is mainly formed by taking a slurry pump impeller as a basis and carrying out corresponding structural improvement, and mainly takes a cantilever type and a single stage as main parts. In addition, in order to effectively prevent the shaft seal from leaking, a combination form of dynamic seal, packing seal or mechanical seal and the like is adopted; a labyrinth clearance seal is arranged between the impeller and the rear guard plate, so that the leakage of a solid-liquid mixed medium to the stuffing box is greatly reduced, and the reliability of the shaft seal is effectively ensured; the impeller is provided with the back blade, and a backflow solid-liquid mixed medium is discharged in time, so that the volume rate is improved, the backflow and erosion are reduced, and the service life of a flow passage component is prolonged; the bracket structure is usually a horizontal split type, and is optimized in terms of hydraulic design and structural design in order to prolong the service life of the bearing, so that radial force and axial force are reasonably distributed; the shaft seal structure usually adopts the form that the auxiliary impeller adds the packing and seals, and the auxiliary impeller adds the packing and seals for hydrodynamic force, leans on the pressure head that the auxiliary impeller produced to resist the outer hourglass of impeller export liquid, utilizes the impeller apron to establish back of the body blade simultaneously and adds water seal ring and filler and prevent that the air from getting into, reduces the pressure of filler department with back of the body blade and water seal ring again, has the effect that prevents impurity entering seal. Because the restriction of sediment stuff pump rotational speed, single-stage impeller flow and lift, the flow of present coal slime medium pump and lift can't satisfy actual condition's operation demand, if when needing higher lift distance, need several single-stage coal slime medium pump to establish ties, the area occupied of this kind of scheme not only is too big, and last one-level coal slime medium pump bears huge axial force moreover, seriously influences the life of coal slime medium pump.
In the Chinese patent with the publication number of CN111412177B, a horizontal multistage slurry pump with serially connected impellers is provided, and a permanent magnet pushing device is adopted to balance the axial force, so that the safety and the stability of the operation of the pump are improved. The utility model discloses a multistage slurry pump (application number: 201420428660.5), which discloses a multistage slurry pump with cantilever type impellers arranged back to back. The existing retrieved coal slurry medium pumps are all multi-stage slurry pumps, and are formed by corresponding improvement on the basis of only a slurry pump impeller aiming at the coal slurry medium pump with high lift and large flow.
In view of this, for the large-flow, long-distance transport has the abrasive solid-liquid mixed medium, need a coal slime medium pump that can realize high lift, large-flow and can normally work for a long time under strong abrasive working condition urgently.
Disclosure of Invention
The invention aims to provide a horizontal middle-open type double-shell high-lift multistage slurry pump, and aims to solve the problem that the lift of a slurry medium pump is low when an abrasive solid-liquid mixed medium is conveyed for a long distance at a large flow in the prior art.
In order to realize the purpose, the invention adopts the following technical scheme: the horizontal middle-open type double-shell high-lift multistage slurry pump comprises a coupling, a pump shaft, an upper pump body and a lower pump body, wherein the pump shaft is arranged in bearing supports on two sides of the lower pump body through a bearing assembly A and a bearing assembly B, a first-stage impeller, an intermediate partition wall, an intermediate annular sealing assembly and a second-stage impeller are sequentially arranged on the pump shaft, a first-stage volute and a second-stage volute are arranged in a cavity formed between the upper pump body and the lower pump body, a first-stage sealing ring and a second-stage sealing ring are respectively and fixedly arranged at inner holes of the first-stage volute and the second-stage volute, the first-stage volute and the second-stage volute are respectively nested outside the first-stage impeller and the second-stage impeller, a first-stage volute gland is arranged at the top of the upper pump body, the bottom of the first-stage volute gland is contacted with the first-stage volute, a second-stage volute gland is arranged at the top of the upper pump body, and the bottom of the second volute gland is contacted with the second-stage volute, and the outlet of the first-stage volute is communicated with the inlet of the second-stage volute through a transition section.
The further technical scheme of the invention is that the diameter of an inner hole from the transition section inlet to the transition section outlet is gradually increased.
According to a further technical scheme, the lower end face of the upper pump body and the upper end face of the lower pump body are horizontal planes and are connected through a plurality of same bolts, and the volume of a water inlet cavity of the lower pump body is not smaller than that of the water inlet cavity of the upper pump body.
According to a further technical scheme, the middle annular sealing assembly comprises a middle sealing bush and a middle sealing shaft sleeve, the middle sealing shaft sleeve is fixedly mounted on the pump shaft, the middle sealing bush is fixedly mounted on the middle partition wall, spiral sealing grooves are formed in the inner hole surface of the middle sealing bush and the outer circle surface of the middle sealing shaft sleeve, and the spiral sealing groove in the inner hole surface of the middle sealing bush is opposite to the spiral sealing groove in the outer circle surface of the middle sealing shaft sleeve in the rotating direction.
According to a further technical scheme, an annular gap between the middle sealing bushing and the middle sealing shaft sleeve is 0.5 mm.
The further technical scheme of the invention is that back blades are arranged on the back surfaces of the front cover plate and the back cover plate of the first-stage impeller and the second-stage impeller, the materials of the first-stage impeller and the second-stage impeller are SiC ceramics, the length of the back blade on the back surface of the front cover plate of the first-stage impeller is greater than that of the back blade on the back surface of the back cover plate of the first-stage impeller, and the length of the back blade on the back surface of the front cover plate of the second-stage impeller is equal to that of the back blade on the back surface of the back cover plate of the second-stage impeller.
In order to enable the rotary friction matching surface of the middle annular sealing assembly to have the effect of conveniently observing the interior, the further technical scheme of the invention is that a plasma surfacing Ni alloy coating is adopted for the rotary friction matching surface of the middle annular sealing assembly.
In order to enable the observation cover to be conveniently mounted and dismounted, the observation cover is arranged in the upper pump body, the observation cover is arranged in the observation hole, a plurality of inclined insertion holes are formed in the top end of the observation hole in the circumferential direction, a plurality of insertion blocks are arranged on the parts, corresponding to the inclined insertion holes, of the observation cover, vertical through holes are formed in the insertion blocks, insertion rods capable of being inserted into the through holes are connected in the observation hole wall in a sliding mode, a control assembly used for controlling the insertion rods to ascend and descend is arranged on the observation hole wall, the control assembly comprises a plurality of first springs respectively arranged on the insertion rods, the other ends of the insertion rods are fixedly connected with a same connecting ring, and the connecting ring is connected with the observation hole wall in a sliding mode.
The invention adopts a further technical scheme that a rotating ring is rotatably connected at the outer edge of the connecting ring, a pressing ring is fixedly connected at the bottom of the connecting ring through a fixed rod, a rotating seat is rotatably connected at the bottom of the observation hole, an observation mirror is rotatably connected on the rotating seat, an accommodating groove for accommodating the observation mirror is formed in the inner wall of the observation hole, a moving rod is slidably connected on the rotating seat, a second spring is connected between the moving rod and the rotating seat, a connecting rod is hinged on the observation mirror, a sliding groove is formed in one side of the moving rod close to the observation mirror, the other end of the connecting rod is rotatably and slidably connected in the sliding groove, gear rings are fixedly connected on the rotating ring and the rotating seat, the gear rings on the rotating seat are meshed with gear shafts, and the other end of the gear shafts can be meshed with the gear rings on the rotating ring.
According to a further technical scheme, a stop block which can slide along the radial direction of the observation hole and is used for stopping the connecting ring to avoid the connecting ring from rising is connected to the inner wall of the observation hole in a sliding mode, an inclined surface which can abut against the observation cover is arranged on one side of the top end of the stop block, and a third spring is connected between the stop block and the wall of the observation hole.
The beneficial effects of the invention are:
1. when the invention is used, the single-stage flow of the coal slime medium pump is 300m3H, the lift is 80m, and the flow of the whole pump unit is 300m3The delivery lift reaches 160m, so that the high flow and the high delivery lift of the coal slime medium pump are realized; the two-stage impeller is arranged on the pump shaft in a symmetrical arrangement mode, and axial forces generated by the first-stage impeller and the second-stage impeller can be balanced with each other, so that the influence of residual axial force on the bearing assembly is reduced, and the service life of the bearing assembly is prolonged.
2. When the invention is used, the materials of the first-stage impeller and the second-stage impeller are SiC ceramics, thus greatly improving the wear resistance and corrosion resistance of the coal slime medium pump flow-through part; the rotary friction matching surface of the middle annular sealing assembly adopts the plasma surfacing Ni alloy coating, so that the wear resistance of the middle annular sealing assembly is improved, the interstage leakage and volume loss of the coal slime medium pump are reduced, and the efficiency of the whole pump unit is improved.
3. When the observation cover is used, when the internal condition needs to be observed, the connecting ring is pulled downwards to enable the connecting ring to drive the inserting rod to move downwards, so that the inserting rod is separated from the through hole in each inserting block, the observation cover is taken down, and the observation cover is convenient to open and install.
4. When the observation cover is installed, the observation cover abuts against the top end of the stopper to retract the stopper, so that the connecting ring ascends.
Drawings
FIG. 1 is a cross-sectional view of an embodiment of the present invention.
Fig. 2 is a side view of an embodiment of the present invention.
Fig. 3 is a schematic view of the structure of the viewing cover in an embodiment of the present invention.
FIG. 4 is a schematic view of another viewing angle of the viewing cover in an embodiment of the present invention.
Fig. 5 is a schematic view of the structure of the travel bar in an embodiment of the present invention.
In the figure: 1. a coupling; 2. a pump shaft; 3. a bearing assembly A; 4. a packing seal assembly; 5. an upper pump body; 6. an observation cover; 7. a first-stage volute gland; 8. a primary seal ring; 9. a first-stage impeller; 10. a first-stage volute; 11. a middle partition wall; 12. a second-stage volute gland; 13. a middle annular seal assembly; 14. a second-stage volute; 15. a secondary impeller; 16. a secondary seal ring; 17. inserting a block; 18. a bearing assembly B; 19. a transition section; 20. a lower pump body; 21. a middle seal bushing; 22. a middle seal shaft sleeve; 23. a first spring; 24. a connecting ring; 25. a rotating ring; 26. pressing a ring; 27. a rotating base; 28. an observation mirror; 29. a travel bar; 30. a second spring; 31. a connecting rod; 32. a ring gear; 33. a gear shaft; 34. a stopper; 35. a third spring; 36. and (4) inserting the rod.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings.
As shown in fig. 1-5, the horizontal middle-open type double-casing high-lift multistage slurry pump includes a shaft coupling 1, a pump shaft 2, an upper pump body 5 and a lower pump body 20, the pump shaft 2 is installed in bearing supports at two sides of the lower pump body 20 through a bearing assembly a 3 and a bearing assembly b 18, a first-stage impeller 9, an intermediate partition wall 11, an intermediate annular seal assembly 13 and a second-stage impeller 15 are sequentially installed on the pump shaft 2, a first-stage volute 10 and a second-stage volute 14 are installed in a cavity formed between the upper pump body 5 and the lower pump body 20, a first-stage sealing ring 8 and a second-stage sealing ring 16 are respectively and fixedly installed at inner holes of the first-stage volute 10 and the second-stage volute 14, the first-stage volute 10 and the second-stage volute 14 are respectively nested outside the first-stage impeller 9 and the second-stage impeller 15, a first-stage volute gland 7 is installed at the top of the upper pump body 5, and the bottom of the first-stage volute gland 7 is in contact with the first-stage volute 10, the top of the upper pump body 5 is provided with a second-stage volute gland 12, the bottom of the second-stage volute gland 12 is in contact with a second-stage volute 14, the sealing cavities on the left side and the right side of the upper pump body 5 and the lower pump body 20 are respectively provided with a packing sealing assembly 4, and the outlet of the first-stage volute 10 is communicated with the inlet of the second-stage volute 14 through a transition section 19.
In the embodiment, the two-stage impellers are symmetrically arranged on the pump shaft 2, the axial forces generated by the first-stage impeller 9 and the second-stage impeller 15 can be balanced, the influence of residual axial force on the bearing assembly is reduced, the service life of the bearing assembly is prolonged, the interstage leakage and volume loss of the coal slime medium pump are reduced, and the efficiency of the whole pump unit is improved.
Preferably, the diameter of the inner hole from the inlet of the transition section 19 to the outlet of the transition section 19 is gradually increased.
Further, the lower end face of the upper pump body 5 and the upper end face of the lower pump body 20 are both horizontal planes, the two are connected through a plurality of same bolts, and the volume of the water inlet cavity of the lower pump body 20 is not less than that of the water inlet cavity of the upper pump body 5.
Further, middle annular seal assembly 13 include middle sealed bush 21 and middle sealed axle sleeve 22, middle sealed axle sleeve 22 fixed mounting is on pump shaft 2, middle sealed bush 21 is through fixed mounting on middle partition wall 11, the spiral seal groove is all seted up with middle sealed axle sleeve 22's excircle surface to the hole surface of middle sealed bush 21, the spiral seal groove rotation direction of the hole surface of middle sealed bush 21 is opposite with the spiral seal groove rotation direction of the excircle surface of middle sealed axle sleeve 22.
Further, the annular gap between the middle sealing bush 21 and the middle sealing shaft sleeve 22 is 0.5 mm.
Further, the back surfaces of the front cover plate and the back cover plate of the first-stage impeller 9 and the second-stage impeller 15 are both provided with back blades, the first-stage impeller 9 and the second-stage impeller 15 are made of SiC ceramics, the length of the back blades on the back surface of the front cover plate of the first-stage impeller 9 is greater than that of the back blades on the back surface of the back cover plate of the first-stage impeller 9, and the length of the back blades on the back surface of the front cover plate of the second-stage impeller 15 is equal to that of the back blades on the back surface of the back cover plate of the second-stage impeller 15.
Furthermore, the rotary friction matching surface of the middle annular sealing component 13 adopts a Ni60 alloy coating layer formed by plasma surfacing, and the single-stage flow rate of the coal slurry medium pump is 300m3H, the lift is 80m, and the flow of the whole pump unit is 300m3The delivery lift reaches 160m, so that the high flow and the high delivery lift of the coal slime medium pump are realized; the primary impeller 9 and the secondary impeller 15 are made of SiC ceramics, so that the wear resistance and corrosion resistance of the coal slime medium pump flow-through part are greatly improved; the rotary friction matching surface of the middle annular sealing component 13 adopts a Ni60 alloy coating formed by plasma surfacing, so that the wear resistance of the middle annular sealing component 13 is improved.
Furthermore, an observation hole is formed in the upper pump body 5, an observation cover 6 is installed in the observation hole, a plurality of oblique insertion holes are formed in the top end of the observation hole along the circumferential direction, a plurality of insertion blocks 17 are arranged on the positions of the observation cover 6 corresponding to the oblique insertion holes, vertical through holes are formed in the insertion blocks 17, an insertion rod 36 capable of being inserted into the through holes is slidably connected to the wall of the observation hole, a control assembly for controlling the insertion rod 36 to ascend and descend is installed on the wall of the observation hole, the control assembly comprises a plurality of first springs 23 respectively installed on the insertion rod 36, the same connection ring 24 is fixedly connected to the other end of the insertion rod 36, the connection ring 24 is slidably connected to the wall of the observation hole, when the internal condition needs to be observed, the connection ring 24 is pulled downwards to drive the connection ring 24 to drive the insertion rod 36 to move downwards, so that the insertion rod 36 is separated from the through holes on the insertion blocks 17, thereby removing the viewing cover 6 and thus providing for ease of opening and installation of the viewing cover 6.
Specifically, the outer edge of the connecting ring 24 is rotatably connected with a rotating ring 25, the bottom of the connecting ring 24 is fixedly connected with a pressing ring 26 through a fixing rod, the bottom of the observation hole is rotatably connected with a rotary seat 27, the rotary seat 27 is rotatably connected with an observation mirror 28, the inner wall of the observation hole is provided with a holding groove for holding an observation mirror 28, the rotating base 27 is connected with a moving rod 29 in a sliding way, a second spring 30 is connected between the moving rod 29 and the rotating seat 27, a connecting rod 31 is hinged on the observation mirror 28, a sliding groove is arranged on one side of the moving rod 29 close to the observation mirror 28, the other end of the connecting rod 31 is rotatably and slidably connected in the sliding groove, the rotating ring 25 and the rotating base 27 are both fixedly connected with a gear ring 32, the gear ring 32 on the rotating base 27 is meshed with a gear shaft 33, and the other end of the gear shaft 33 can be meshed with the gear ring 32 on the rotating ring 25.
Specifically, a stopper 34 which can slide along the radial direction of the observation hole and is used for stopping the connecting ring 24 to avoid the connecting ring 24 from rising is slidably connected to the inner wall of the observation hole, an inclined surface which can be abutted against the observation cover 6 is arranged on one side of the top end of the stopper 34, a third spring 35 is connected between the stopper 34 and the observation hole wall, the rotating ring 25 is pulled downwards to enable the connecting ring 24 to move downwards, then the observation cover 6 is taken out, the stopper 34 pops up under the action of the third spring 35 to avoid the connecting ring 24 from rising, meanwhile, the connecting ring 24 descends to enable the moving rod 29 to move downwards to enable the observation mirror 28 to rotate downwards, so that the position which cannot be observed directly through the observation hole can be observed, the gear shaft 33 is meshed with the gear ring 32 on the rotating ring 25, meanwhile, the stopper 34 pops up to stop the connecting ring 24 to avoid the connecting ring 24 from rising, then, the rotating ring 25 enables the rotating seat 27 to rotate through the gear ring 32 and the gear shaft 33, thereby changing the position of the sight glass 28 and thus adjusting the viewing position, when the sight glass 6 is mounted, the sight glass 6 retracts the stopper 34 against the top end of the stopper 34, and the attachment ring 24 is raised.
In the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (10)
1. The horizontal middle-open type double-shell high-lift multistage slurry pump is characterized by comprising a shaft coupling (1), a pump shaft (2), an upper pump body (5) and a lower pump body (20), wherein the pump shaft (2) is installed in bearing supports on two sides of the lower pump body (20) through a bearing assembly A (3) and a bearing assembly B (18), a first-stage impeller (9), an intermediate partition wall (11), an intermediate annular sealing assembly (13) and a second-stage impeller (15) are sequentially installed on the pump shaft (2), a first-stage volute (10) and a second-stage volute (14) are installed in a cavity formed between the upper pump body (5) and the lower pump body (20), a first-stage sealing ring (8) and a second-stage sealing ring (16) are respectively and fixedly installed at inner holes of the first-stage volute (10) and the second-stage volute (14), and the first-stage volute (10) and the second-stage volute (14) are respectively nested outside the first-stage impeller (9) and the second-stage impeller (15), go up the top of the pump body (5) and install the bottom and the one-level spiral case (10) of one-level spiral case gland (7) and contact, the bottom of going up the top of the pump body (5) and installing second grade spiral case gland (12) and second grade spiral case gland (12) contacts with second grade spiral case (14), go up the seal chamber of the left and right sides of the pump body (5) and lower pump body (20) and all install packing seal assembly (4), the exit of one-level spiral case (10) is linked together through changeover portion (19) with the import department of second grade spiral case (14).
2. The horizontal mid-open type double-shell high-lift multistage slurry pump according to claim 1, wherein the diameter of the inner hole from the inlet of the transition section (19) to the outlet of the transition section (19) is gradually increased.
3. The horizontal mid-open type double-shell high-lift multistage slurry pump according to claim 1, wherein the lower end surface of the upper pump body (5) and the upper end surface of the lower pump body (20) are both horizontal surfaces and are connected through a plurality of identical bolts, and the volume of the water inlet cavity of the lower pump body (20) is not less than that of the water inlet cavity of the upper pump body (5).
4. The horizontal mid-open type double-shell high-lift multistage slurry pump according to claim 1, wherein the middle annular seal assembly (13) comprises a middle seal bushing (21) and a middle seal shaft sleeve (22), the middle seal shaft sleeve (22) is fixedly mounted on the pump shaft (2), the middle seal bushing (21) is fixedly mounted on the middle partition wall (11), spiral seal grooves are formed in the inner hole surface of the middle seal bushing (21) and the outer circle surface of the middle seal shaft sleeve (22), and the spiral seal groove rotating direction of the inner hole surface of the middle seal bushing (21) is opposite to that of the outer circle surface of the middle seal shaft sleeve (22).
5. The horizontal mid-open double shell high-lift multistage slurry pump according to claim 1, wherein the annular gap between the middle seal bushing (21) and the middle seal bushing (22) is 0.5 mm.
6. The horizontal mid-open type double-shell high-lift multistage slurry pump according to claim 1, wherein back blades are arranged on the back surfaces of front and back cover plates of the first-stage impeller (9) and the second-stage impeller (15), the first-stage impeller (9) and the second-stage impeller (15) are made of SiC ceramic, the length of the back blade on the back surface of the front cover plate of the first-stage impeller (9) is greater than that of the back blade on the back surface of the back cover plate of the first-stage impeller (9), and the length of the back blade on the back surface of the front cover plate of the second-stage impeller (15) is equal to that of the back blade on the back surface of the back cover plate of the second-stage impeller (15).
7. The horizontal mid-open double-shell high-lift multistage slurry pump according to claim 1, wherein the rotating friction mating surface of the middle annular seal assembly (13) is coated with a plasma surfacing Ni60 alloy coating.
8. The horizontal mid-open double-shell high-lift multistage slurry pump according to any one of claims 1 to 7, it is characterized in that the upper pump body (5) is provided with an observation hole, an observation cover (6) is arranged in the observation hole, a plurality of oblique insertion holes are arranged at the top end of the observation hole along the circumferential direction, a plurality of insertion blocks (17) are arranged on the parts of the observation cover (6) corresponding to the oblique insertion holes, the insertion block (17) is provided with a vertical through hole, the wall of the observation hole is connected with an insertion rod (36) which can be inserted into the through hole in a sliding way, the wall of the observation hole is provided with a control component for controlling the lifting of the inserted bar (36), the control component comprises a plurality of first springs (23) which are respectively arranged on the inserted bar (36), the other end of the inserted bar (36) is fixedly connected with the same connecting ring (24), and the connecting ring (24) is in sliding connection with the wall of the observation hole.
9. The horizontal middle-open type double-shell high-lift multistage slurry pump according to claim 8, wherein a rotating ring (25) is rotatably connected to the outer edge of the connecting ring (24), a pressing ring (26) is fixedly connected to the bottom of the connecting ring (24) through a fixing rod, a rotating base (27) is rotatably connected to the bottom of the observation hole, an observation mirror (28) is rotatably connected to the rotating base (27), a receiving groove for receiving the observation mirror (28) is formed in the inner wall of the observation hole, a moving rod (29) is slidably connected to the rotating base (27), a second spring (30) is connected between the moving rod (29) and the rotating base (27), a connecting rod (31) is hinged to the observation mirror (28), a chute is formed in one side of the moving rod (29) close to the observation mirror (28), and the other end of the connecting rod (31) is rotatably and slidably connected to the chute, the rotating ring (25) and the rotating base (27) are both fixedly connected with a gear ring (32), the gear ring (32) on the rotating base (27) is meshed with a gear shaft (33), and the other end of the gear shaft (33) can be meshed with the gear ring (32) on the rotating ring (25).
10. The horizontal middle open type double-shell high-lift multistage slurry pump according to claim 9, wherein a stopper (34) capable of sliding along the radial direction of the observation hole and used for stopping the connecting ring (24) to avoid the connecting ring (24) from rising is slidably connected to the inner wall of the observation hole, an inclined surface capable of abutting against the observation cover (6) is arranged on one side of the top end of the stopper (34), and a third spring (35) is connected between the stopper (34) and the wall of the observation hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210356091.7A CN114576172A (en) | 2022-04-06 | 2022-04-06 | Horizontal middle-open type double-shell high-lift multistage slurry pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210356091.7A CN114576172A (en) | 2022-04-06 | 2022-04-06 | Horizontal middle-open type double-shell high-lift multistage slurry pump |
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| Publication Number | Publication Date |
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| CN114576172A true CN114576172A (en) | 2022-06-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210356091.7A Pending CN114576172A (en) | 2022-04-06 | 2022-04-06 | Horizontal middle-open type double-shell high-lift multistage slurry pump |
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| CN (1) | CN114576172A (en) |
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| KR200214638Y1 (en) * | 2000-06-10 | 2001-02-15 | 김이수 | The sight glass that attached for centrifugal, axial flow, axial mixed flow pump |
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| CN214247637U (en) * | 2020-09-29 | 2021-09-21 | 佛山水业集团高明供水有限公司 | Water pump equipment with flow and pressure online monitoring function |
| CN215672726U (en) * | 2021-09-17 | 2022-01-28 | 河南郑泵科技有限公司 | Horizontal middle-open type double-shell high-lift multistage slurry pump |
-
2022
- 2022-04-06 CN CN202210356091.7A patent/CN114576172A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR200214638Y1 (en) * | 2000-06-10 | 2001-02-15 | 김이수 | The sight glass that attached for centrifugal, axial flow, axial mixed flow pump |
| CN106734037A (en) * | 2016-12-09 | 2017-05-31 | 郑晶晶 | Classroom chemical test protector |
| CN214247637U (en) * | 2020-09-29 | 2021-09-21 | 佛山水业集团高明供水有限公司 | Water pump equipment with flow and pressure online monitoring function |
| CN213504110U (en) * | 2020-10-22 | 2021-06-22 | 龚颖 | Chemical storage tank for plastic manufacturing |
| CN215672726U (en) * | 2021-09-17 | 2022-01-28 | 河南郑泵科技有限公司 | Horizontal middle-open type double-shell high-lift multistage slurry pump |
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