CN113217371A - Corrosion-resistant high-sealing-performance three-screw pump - Google Patents
Corrosion-resistant high-sealing-performance three-screw pump Download PDFInfo
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- CN113217371A CN113217371A CN202110618691.1A CN202110618691A CN113217371A CN 113217371 A CN113217371 A CN 113217371A CN 202110618691 A CN202110618691 A CN 202110618691A CN 113217371 A CN113217371 A CN 113217371A
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- sealing
- main body
- screw
- liquid
- corrosion
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2/00—Rotary-piston machines or pumps
- F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C2/12—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
- F04C2/14—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
- F04C2/16—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
- F04C2/165—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type having more than two rotary pistons with parallel axes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
- F04C14/28—Safety arrangements; Monitoring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
- F04C15/0003—Sealing arrangements in rotary-piston machines or pumps
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention relates to a corrosion-resistant high-sealing three-screw pump, which comprises a pump body for limiting the volume of the three-screw pump, a pump shaft structure for conveying liquid and a lining for limiting the internal liquid flow direction; the pump shaft structure is arranged in the bushing; the bush is arranged in the pump body; the pump body comprises a main body, an end cover and a liquid seal layer; the open end of the main body and the open end of the end shield are clamped with each other, and the joint is sealed by a double-layer fluorine rubber sealing ring; the liquid seal layers are respectively arranged inside the main body and the inner wall of the end cover, and the liquid seal layers inside the main body and the end cover are mutually communicated; the pump shaft structure comprises a main screw rod for transmitting power, an auxiliary screw rod and a limiting seat; the surface protrusion of the main screw rod is meshed with the surface groove of the auxiliary screw rod. The three-screw pump has the beneficial effects that the three-screw pump is simple in structure, high in sealing performance and strong in corrosion resistance, and can work for a long time in a severe environment with strong corrosion.
Description
Technical Field
The invention relates to the technical field of a volumetric screw pump, in particular to an anti-corrosion high-sealing three-screw pump.
Background
The three-screw pump is formed by a pump body and a screw, when a driving screw rotates, the driving screw drives a driven screw engaged with the driving screw to rotate together, the volume of a screw engaging space at one end of a suction cavity is gradually increased, the pressure is reduced, liquid enters the volume of the engaging space under the action of pressure difference, when the volume is increased to the maximum to form a sealed cavity, the liquid continuously moves in the axial direction in the sealed cavities until reaching one end of a discharge cavity, and at the moment, the volume of the screw engaging space at one end of the discharge cavity is gradually reduced to discharge the liquid.
The traditional three-screw pump has a complex internal structure, mainly adopts a metal shell, is coated with corrosion-resistant antirust paint on the surface, has general corrosion resistance, is difficult to work for a long time in a severe environment with strong corrosion resistance, and has poor internal and external sealing performance.
Disclosure of Invention
The invention aims to provide a corrosion-resistant high-sealing three-screw pump to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a corrosion-resistant high-sealing three-screw pump comprises a pump body for defining the volume of the three-screw pump, a pump shaft structure for conveying liquid and a lining for defining the internal liquid flow direction; the pump shaft structure is arranged in the bushing; the bush is arranged in the pump body; the pump body comprises a main body, an end cover and a liquid seal layer; the open end of the main body and the open end of the end shield are clamped with each other, and the joint is sealed by a double-layer fluorine rubber sealing ring; the liquid seal layers are respectively arranged inside the main body and the inner wall of the end cover, and the liquid seal layers inside the main body and the end cover are mutually communicated;
the pump shaft structure comprises a main screw rod for transmitting power, an auxiliary screw rod and a limiting seat; the surface bulge of the main screw rod is meshed with the surface groove of the auxiliary screw rod; the limiting seats are respectively arranged on two sides of the main screw and the auxiliary screw, and the auxiliary screw is rotatably connected with the limiting seats through a small bearing; the auxiliary screw rod is designed by multi-section head-to-tail clamping, and the center of the auxiliary screw rod is connected with a positioning pin;
the bushing comprises a bushing main body for sealing the pump shaft structure and a backflow valve structure for controlling the internal hydraulic pressure; the backflow valve structure is arranged on the liquid outlet of the lining main body; the tail end of the bushing main body is fixedly connected with a sealing cover; the tail side of the inner wall of the sealing cover is provided with a sealing sleeve.
As a further scheme of the invention: a liquid inlet pipe and a liquid outlet pipe are respectively arranged on two sides of the top of the main body; the liquid inlet pipe is arranged at the front end of the lining main body; the liquid outlet pipe is communicated with the outlet of the lining main body.
As a further scheme of the invention: the main body is connected with the end cover through a bolt; the bottom both sides of main part all fixedly connected with mount pad.
As a further scheme of the invention: the closed end of the main body is respectively provided with a liquid injection port and a liquid overflow port; the liquid injection port and the overflow port are communicated with the liquid seal layer; and the outer ends are provided with sealing plugs.
As a further scheme of the invention: the main screw rod extends to the outer side of the end shield; both sides of the main screw rod are respectively and rotatably connected with the main body and the end shield through large bearings; the inner wall of the end shield tightly presses the outer end of the sealing sleeve.
As a further scheme of the invention: the main screw rod front side limiting seat is connected with the main body; the tail side limiting seat of the main screw rod is arranged on the tail side of the inner wall of the bushing main body; the bush main part joint is inside the main part.
As a further scheme of the invention: the backflow valve structure comprises a baffle plate, a compression-resistant spring, a movable rod, a connecting frame and a liquid return pipe; the movable rod is connected to the center of the connecting frame in a sliding manner; the connecting frame is fixedly connected with the tail end of the liquid return pipe; the baffle plate is fixed at the tail end of the movable rod; the compression-resistant spring is sleeved on the surface of the movable rod and is positioned between the connecting frame and the baffle.
As a further scheme of the invention: the center of the sealing cover is sleeved with the surface of the main screw rod.
As a further scheme of the invention: the sealing sleeve comprises a shell, two mechanical sealing rings and sealing filler, wherein the two mechanical sealing rings are respectively arranged on two sides of the inner wall of the shell; the sealing filler is positioned between the two mechanical sealing rings.
As a further scheme of the invention: the surfaces of the main body and the end shield are subjected to pre-corrosion treatment, and corrosion-resistant and rust-proof materials are sprayed on the surfaces after the pre-corrosion treatment.
Compared with the prior art, the invention has the beneficial effects that: the inner wall of the pump body is designed to be a hollow liquid seal layer, the assembly precision and the sealing property of the pump body can be detected through internal liquid injection, meanwhile, corrosion-resistant liquid can be filled into the pump body after the pump body is assembled, secondary corrosion is prevented, and the corrosion resistance of the pump can be greatly improved by matching with primary corrosion prevention of a corrosion-resistant and rust-proof material sprayed on the surface of the pump body after the surface of the pump body is subjected to pre-corrosion treatment;
the auxiliary screw rod adopts a multi-section splicing design, so that the processing difficulty can be reduced, the processing precision is improved, the positioning pin is arranged in the middle, the structural strength and the deflection after splicing can be ensured, the main screw rod and the auxiliary screw rod tend to be perfectly meshed, and the leakage during infusion can be avoided by matching with the bushing for sealing;
meanwhile, the shaft end extending from the main screw rod adopts a sealing means of sealing the packing by mechanical seal, so that the sealing effect is better and the structure is simple.
Other features and advantages of the present invention will be disclosed in more detail in the following detailed description of the invention and the accompanying drawings.
Drawings
FIG. 1 is a schematic view of a corrosion resistant high seal triple screw pump according to the present invention;
FIG. 2 is an enlarged view of the structure of FIG. 1A;
FIG. 3 is an enlarged view of the structure of FIG. 1B;
FIG. 4 is an enlarged view of the structure of FIG. 1C;
FIG. 5 is a front axial view of the structure of a corrosion resistant high seal triple screw pump of the present invention;
FIG. 6 is a structural rear axial view of a corrosion resistant high seal triple screw pump of the present invention;
FIG. 7 is a front axial view of a structural liner of the corrosion resistant high seal triple screw pump of the present invention;
FIG. 8 is a schematic diagram of a pump shaft configuration for a corrosion resistant high seal three-screw pump according to the present invention;
FIG. 9 is an exploded view of the slave screw configuration of the corrosion resistant high seal three-screw pump of the present invention;
FIG. 10 is a schematic view showing the structure of a back-flow valve of a corrosion-resistant high-sealing three-screw pump according to the present invention.
The anti-corrosion high-sealing-performance three-screw pump comprises a corrosion-resistant high-sealing-performance three-screw pump 100, a pump body 10, a main body 11, a liquid inlet pipe 111, a liquid outlet pipe 112, a mounting seat 113, a liquid injection port 114, a liquid overflow port 115, an end cover 12, a liquid seal layer 13, a large bearing 14, a pump shaft structure 20, a main screw 21, an auxiliary screw 22, a limiting seat 23, a small bearing 24, a positioning pin 25, a bushing 30, a bushing main body 31, a backflow valve structure 32, a baffle 321, a pressure-resistant spring 322, a movable rod 323, a connecting frame 324, a liquid return pipe 325, a sealing cover 33, a sealing sleeve 34, a shell 341, a mechanical sealing ring 342 and sealing filler 343.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In an embodiment of the present invention, as shown in fig. 1 to 10, a corrosion-resistant high-sealing triple-screw pump 100 includes a pump body 10 for defining a volume of the triple-screw pump, a pump shaft structure 20 for transporting a liquid, and a liner 30 for defining an inner liquid flow direction. The pump shaft structure 20 is disposed within the liner 20. The bush 20 is disposed in the pump body 10. The pump body 10 includes a main body 11, an end cap 12, and a liquid seal layer 13. The open end of main part 11 and the open end of end shield 12 joint each other, and the junction adopts double-deck fluorine to glue the sealing washer sealed. The pump body connection sealing performance is improved, the liquid seal layers 13 are respectively arranged inside the inner walls of the main body 11 and the end cover 12, the liquid seal layers 13 inside the main body and the end cover are mutually communicated, and splicing precision detection and inner and outer sealing performance detection are achieved.
The pump shaft structure 20 includes a main screw 21 for transmitting power, a sub screw 22, and a stopper seat 23. The surface projections of the main screw 21 are engaged with the surface recesses of the sub screw 22. The limiting seat 23 is respectively arranged at two sides of the main screw 21 and the auxiliary screw 22, and the auxiliary screw 22 is rotatably connected with the limiting seat 23 through a small bearing 24. The auxiliary screw 22 is designed by multi-section head-to-tail clamping, and the center of the auxiliary screw 22 is connected with the positioning pin 25, so that the processing precision and the disturbance degree of the auxiliary screw are ensured, the main screw and the auxiliary screw tend to be perfectly meshed, and the liquid leakage is reduced.
The bushing 30 includes a bushing body 31 for sealing the pump shaft structure 20 and a return valve structure 32 for controlling the internal hydraulic pressure. The return valve structure 32 is provided on the liquid outlet of the liner main body 31. A sealing cover 33 is fixedly connected to the rear end of the liner main body 31. The sealing performance of the inner bushing is improved, internal leakage during infusion is avoided, and the sealing sleeve 34 is arranged on the tail side of the inner wall of the sealing cover 33, so that the shaft end of the main screw rod is sealed.
In this embodiment, the two sides of the top of the main body 11 are respectively provided with a liquid inlet pipe 111 and a liquid outlet pipe 112. The liquid inlet pipe 111 is provided at the front end of the liner main body 31. The liquid outlet pipe 112 is communicated with an outlet of the bushing main body 31, so that liquid can be conveniently fed and discharged, and hydraulic conveying is achieved.
In this embodiment, the main body 11 and the end cover 12 are connected by bolts. Both sides of the bottom of the main body 11 are fixedly connected with mounting seats 113. The pump body is convenient to install.
In this embodiment, the closed end of the main body 11 is provided with a liquid injection port 114 and a liquid overflow port 115, respectively. The liquid filling port 114 and the overflow port 115 are both communicated with the liquid seal layer 13. And the outer ends are provided with sealing plugs. The corrosion-resistant liquid and the pressure element are convenient to add.
In this embodiment, the main screw 21 extends to the outside of the end cover 12. Both sides of the main screw 21 are respectively connected with the main body 11 and the end shield 12 in a rotating way through large bearings 14. The inner wall of the end shield 12 is pressed against the outer end of the sealing sleeve 34. And the requirement of structural design is met.
In this embodiment, the front stopper 23 of the main screw 21 is connected to the main body 11. The tail-side stopper seat 23 of the main screw 21 is provided on the tail side of the inner wall of the bushing main body 31. The bush main body 31 is clamped inside the main body 11, and the internal infusion sealing performance is improved.
In this embodiment, the backflow valve structure 32 includes a blocking plate 321, a pressure-resistant spring 322, a movable rod 323, a connecting frame 324, and a liquid return pipe 325. The movable bar 323 is slidably coupled to the center of the coupling frame 324. The connecting frame 324 is fixedly connected to the rear end of the liquid return pipe 325. The baffle 321 is fixed to the rear end of the movable rod 323. The compression spring 322 is sleeved on the surface of the movable rod 323 and is located between the connecting frame 324 and the baffle 321. The high-pressure automatic pressure relief is realized, and the overpressure protection is achieved.
In this embodiment, the center of the sealing cap 33 is fitted to the surface of the main screw 21.
In this embodiment, the sealing sleeve 34 includes a housing 341, two mechanical sealing rings 342 and a sealing packing 343, and the number of the mechanical sealing rings 342 is two, and the two mechanical sealing rings are respectively disposed on two sides of the inner wall of the housing 341. The seal packing 34 is located between two mechanical seal rings 342. Realize the sealed protection of main screw 21 axle head multilayer, improve sealed effect.
In this embodiment, the surfaces of the main body 11 and the end shield 12 are both subjected to pre-corrosion treatment, and the surfaces are sprayed with corrosion-resistant and rust-proof materials after the pre-corrosion treatment. And the external primary corrosion-resistant protection is realized.
When the device is used, the pump body 10 is fixed by the mounting base 113, then the shaft of the main screw 21 extending out of the end cover 12 is connected with a power source, then the external pipelines of the liquid inlet pipe 111 and the liquid outlet pipe 112 are connected, an internal pressure detection element (for detecting the internal pressure of the liquid sealing layer 13 to judge the corrosion condition of the pump body) is additionally arranged at the liquid injection port 114 or the liquid overflow port 115, if the internal pressure value is within the set value error, the pump body is not damaged, if the internal pressure value is obviously different from the set value, the pump body is damaged and needs to be overhauled in time), then the power source is started, the main screw 21 is driven by the power source to rotate, then the auxiliary screws 22 at two sides and the lining main body 31 are matched to carry out high-tightness liquid conveying, the internal pressurization circulation is reached, and when the internal conveying liquid pressure exceeds the internal set pressure, the baffle 321 can extrude the compression spring 322 to move inwards under the pressure effect, so that the liquid returns to the liquid inlet pipe side through the liquid return pipe 325, pressure relief is realized, and after the pressure relief is finished, the baffle 321 can reset and block under the action of the pressure-resistant spring 322, so that overpressure protection is achieved.
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. A corrosion-resistant high-sealing three-screw pump comprises a pump body for defining the volume of the three-screw pump, a pump shaft structure for conveying liquid and a lining for defining the internal liquid flow direction; the pump shaft structure is arranged in the bushing; the bushing is arranged in the pump body; the pump body is characterized by comprising a main body, an end cover and a liquid seal layer; the opening end of the main body and the opening end of the end cover are clamped with each other, and the joint is sealed by a double-layer fluorine rubber sealing ring; the liquid seal layers are respectively arranged inside the main body and the inner wall of the end cover, and the liquid seal layers inside the main body and the end cover are mutually communicated;
the pump shaft structure comprises a main screw rod for transmitting power, an auxiliary screw rod and a limiting seat; the surface bulge of the main screw rod is meshed with the surface groove of the auxiliary screw rod; the limiting seats are respectively arranged on two sides of the main screw rod and the auxiliary screw rod, and the auxiliary screw rod is rotatably connected with the limiting seats through small bearings; the auxiliary screw rod is designed by adopting multi-section head-to-tail clamping, and the center of the auxiliary screw rod is connected with a positioning pin;
the liner includes a liner body for sealing the pump shaft structure and a return valve structure for controlling internal hydraulic pressure; the backflow valve structure is arranged on the liquid outlet of the lining main body; the tail end of the bushing main body is fixedly connected with a sealing cover; and a sealing sleeve is arranged on the tail side of the inner wall of the sealing cover.
2. The corrosion-resistant high-sealing three-screw pump according to claim 1, wherein a liquid inlet pipe and a liquid outlet pipe are respectively arranged on two sides of the top of the main body; the liquid inlet pipe is arranged at the front end of the lining main body; the liquid outlet pipe is communicated with the outlet of the lining main body.
3. A corrosion resistant high sealing triple screw pump according to claim 1, wherein said body and said end shield are bolted together; the bottom both sides of main part all fixedly connected with mount pad.
4. A corrosion resistant high sealing three-screw pump according to claim 1, wherein the closed end of the main body is provided with a liquid injection port and a liquid overflow port respectively; the liquid injection port and the overflow port are both communicated with the liquid seal layer; and the outer ends are provided with sealing plugs.
5. A corrosion resistant high sealing triple screw pump according to claim 1, wherein said main screw extends to the outside of said end shield; both sides of the main screw rod are respectively and rotatably connected with the main body and the end shield through large bearings; the inner wall of the end shield tightly presses the outer end of the sealing sleeve.
6. The corrosion-resistant high-sealing three-screw pump according to claim 1, wherein the stopper seat is attached to the body at a front side of the main screw; the limiting seat at the tail side of the main screw is arranged at the tail side of the inner wall of the bushing main body; the lining main body is clamped inside the main body.
7. The corrosion-resistant high-sealing three-screw pump according to claim 1, wherein the backflow valve structure comprises a baffle plate, a compression-resistant spring, a movable rod, a connecting frame and a liquid return pipe; the movable rod is connected to the center of the connecting frame in a sliding manner; the connecting frame is fixedly connected to the tail end of the liquid return pipe; the baffle plate is fixed at the tail end of the movable rod; the compression-resistant spring is sleeved on the surface of the movable rod and is positioned between the connecting frame and the baffle.
8. The corrosion-resistant high-sealing three-screw pump according to claim 1, wherein the center of the seal housing is fitted to the surface of the main screw.
9. The corrosion-resistant high-sealing three-screw pump according to claim 1, wherein the sealing sleeve comprises a housing, two mechanical sealing rings and sealing filler, and the two mechanical sealing rings are respectively arranged on two sides of the inner wall of the housing; the sealing filler is positioned between the two mechanical sealing rings.
10. The corrosion-resistant high-sealing three-screw pump according to claim 1, wherein the surfaces of the main body and the end shield are pre-etched, and the surfaces are coated with corrosion-resistant and rust-proof materials after the pre-etching.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110618691.1A CN113217371A (en) | 2021-06-03 | 2021-06-03 | Corrosion-resistant high-sealing-performance three-screw pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110618691.1A CN113217371A (en) | 2021-06-03 | 2021-06-03 | Corrosion-resistant high-sealing-performance three-screw pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113217371A true CN113217371A (en) | 2021-08-06 |
Family
ID=77082574
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110618691.1A Withdrawn CN113217371A (en) | 2021-06-03 | 2021-06-03 | Corrosion-resistant high-sealing-performance three-screw pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113217371A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114909284A (en) * | 2022-04-06 | 2022-08-16 | 德帕姆(杭州)泵业科技有限公司 | Three-screw pump |
-
2021
- 2021-06-03 CN CN202110618691.1A patent/CN113217371A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114909284A (en) * | 2022-04-06 | 2022-08-16 | 德帕姆(杭州)泵业科技有限公司 | Three-screw pump |
| CN114909284B (en) * | 2022-04-06 | 2023-08-04 | 德帕姆(杭州)泵业科技有限公司 | Three-screw pump |
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Application publication date: 20210806 |