CN112628187B - Sealing structure of throttle orifice plate for replacing valve - Google Patents
Sealing structure of throttle orifice plate for replacing valve Download PDFInfo
- Publication number
- CN112628187B CN112628187B CN202011569816.8A CN202011569816A CN112628187B CN 112628187 B CN112628187 B CN 112628187B CN 202011569816 A CN202011569816 A CN 202011569816A CN 112628187 B CN112628187 B CN 112628187B
- Authority
- CN
- China
- Prior art keywords
- sealing
- flushing
- pump cover
- orifice plate
- reserved
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 238000007789 sealing Methods 0.000 title claims abstract description 83
- 238000011010 flushing procedure Methods 0.000 claims abstract description 103
- 238000012856 packing Methods 0.000 claims abstract description 11
- 210000004907 gland Anatomy 0.000 claims abstract description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 15
- 239000010959 steel Substances 0.000 claims description 15
- 239000000945 filler Substances 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 9
- 239000000463 material Substances 0.000 abstract description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000005266 casting Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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
- F04D29/00—Details, component parts, or accessories
- F04D29/08—Sealings
- F04D29/086—Sealings especially adapted for liquid pumps
-
- 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
- F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps
-
- 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
- F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
- F04D29/708—Suction grids; Strainers; Dust separation; Cleaning specially for liquid pumps
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention relates to a sealing structure of an orifice plate instead of a valve, which is arranged in a double-suction pump and comprises a sealing flushing part, wherein the sealing flushing part comprises a sealing flushing pipeline and a sealing flushing pipeline fitting matched with the sealing flushing pipeline; the sealing flushing pipeline is led out from two ends of the pump cover, and the two led-out ends are connected to the flushing holes of the mechanical sealing gland or the reserved filling flushing holes of the pump cover. Compared with the traditional sealing flushing structure, the flushing pipeline of the traditional single-stage double-suction horizontal split centrifugal pump is of a structure with ball valves, the ball valves are distributed on two sides of the top of the pump cover, the positions are high, the field operation difficulty is high, the water quantity is difficult to quantitatively control, and the flushing performance of the mechanical seal is affected; in addition, the universality of the mechanical seal and the packing pump cover is not considered in the initial design stage, so that the mold opening and material management cost is increased, and the product universality is reduced.
Description
Technical Field
The invention relates to a sealing structure, in particular to a sealing structure which is convenient to install, reduces the field operation difficulty, can avoid the operation of adjusting the flushing water quantity in the later field, improves the product universality and reduces the cost in multiple directions.
Background
The flushing pipeline of the existing single-stage double-suction horizontal split centrifugal pump is of a structure with ball valves, the ball valves are distributed on two sides of the top of the pump cover, the positions are high, the field operation difficulty is high, the water quantity is difficult to quantitatively control, and the flushing performance of the mechanical seal is affected; in addition, the universality of the mechanical seal and the packing pump cover is not considered in the initial design stage, so that the mold opening and material management cost is increased, and the product universality is reduced.
Disclosure of Invention
Aiming at the problems, the invention mainly aims to provide a sealing structure of a throttle orifice plate instead of a valve, which is convenient to install, reduces the field operation difficulty, can avoid the operation of adjusting the flushing water quantity in the later field, improves the product universality and reduces the cost in multiple directions.
The invention solves the technical problems by the following technical proposal: a sealing structure of an orifice plate instead of a valve, the sealing structure of the orifice plate instead of the valve being installed in a double suction pump, the sealing structure of the orifice plate instead of the valve comprising: the sealing flushing part comprises a sealing flushing pipeline and a sealing flushing pipeline fitting matched with the sealing flushing pipeline; the sealing flushing pipeline is led out from two ends of the pump cover, and the two led-out ends are connected to the flushing holes of the mechanical sealing gland or the reserved filling flushing holes of the pump cover.
In a specific embodiment of the present invention, the seal flushing part is divided into a structure with an orifice plate and a structure without an orifice plate.
In a specific embodiment of the present invention, the structure of the orifice plate includes: orifice plate, inside and outside joint of reducing, cutting ferrule formula awl screw thread straight-through coupling, seamless steel pipe, cutting ferrule formula awl screw thread end rectangular tube joint, orifice plate direct mount is in the reservation of pump cover both sides washes the downthehole, inside and outside joint of reducing and the reservation of pump cover both sides washes downthehole threaded connection fixed, cutting ferrule formula awl screw thread straight-through coupling is connected with inside and outside joint internal and external screw thread of reducing, cutting ferrule formula awl screw thread straight-through coupling is connected through seamless steel pipe with cutting ferrule formula awl screw thread end rectangular tube joint, cutting ferrule formula awl screw thread end rectangular tube joint and pump cover seal chamber department reservation wash the downthehole or machine seal press cover wash the downthehole threaded connection.
In a specific embodiment of the present invention, the structure without the orifice plate includes: the cutting ferrule type taper thread straight-through pipe joint, seamless steel pipe and cutting ferrule type taper thread end right-angle long pipe joint are specifically connected: the cutting sleeve type cone thread straight-through pipe joint is directly installed on reserved flushing holes on two sides of the pump cover in a threaded connection mode, the cutting sleeve type cone thread straight-through pipe joint is connected with the cutting sleeve type cone thread end right-angle long pipe joint through a seamless steel pipe, and the cutting sleeve type cone thread end right-angle long pipe joint is in threaded connection with a flushing hole reserved in a sealing cavity of the pump cover or a flushing hole on the machine sealing pressure cover.
In the specific implementation example of the invention, when the lift of the double suction pump is more than or equal to 70m, a sealing flushing structure with a throttle orifice plate is selected.
In a specific embodiment of the invention, when the lift of the double suction pump is less than 70m, a sealing flushing structure without a throttle orifice plate is selected.
In a specific embodiment of the invention, the pump cover and the sealed flushing pipeline are sealed by a filler or a mechanical seal.
In the concrete implementation example of the invention, if the packing seal is selected, a packing flushing hole is formed on a reserved flushing boss of the pump cover, and a mechanical seal positioning groove is not processed at the sealing cavity; if mechanical seal is selected, a filling flushing hole is not formed on a reserved flushing boss of the pump cover, and a mechanical seal positioning groove is processed at the sealing cavity.
The invention has the positive progress effects that: the sealing structure of the throttle plate instead of the valve provided by the invention has the following advantages: the sealing flushing pipeline replaces the conventional pipeline valve by a throttle orifice plate, and in the early stage of design, one pump cover casting is considered to simultaneously satisfy two different sealing forms of mechanical seal and filling. The novel mechanical seal flushing structure is convenient to install, reduces the field operation difficulty, can avoid the operation of later-stage field adjustment of flushing water quantity, improves the product universality, reduces the cost in multiple directions, and is convenient for material management.
Drawings
Fig. 1-1 is a schematic diagram of a sealed flushing structure of an orifice plate with throttle according to the present invention.
Fig. 1-2 is an enlarged view of a portion of fig. 1-1.
FIG. 2 is a schematic view of a seal flushing structure without an orifice plate according to the present invention.
Fig. 3 is a schematic diagram of the structure of the orifice plate.
The following are names corresponding to the reference numerals in the present invention:
the device comprises a throttle orifice plate 1, a reducing inner and outer joint 2, a cutting sleeve type taper thread straight-through pipe joint 3, a seamless steel pipe 4 and a cutting sleeve type taper thread end right-angle long pipe joint 5.
Detailed Description
The following description of the preferred embodiments of the present invention is given with reference to the accompanying drawings, so as to explain the technical scheme of the present invention in detail.
Fig. 1-1 is a schematic view of a seal flushing structure of an orifice plate with throttle according to the present invention, and fig. 1-2 is a partially enlarged view of fig. 1-1. FIG. 2 is a schematic view of a seal flushing structure without an orifice plate according to the present invention. As shown in the above figures: the sealing structure of the throttle orifice instead of the valve provided by the invention is arranged in the double-suction pump, and comprises the following components: the sealing flushing part comprises a sealing flushing pipeline and a sealing flushing pipeline fitting matched with the sealing flushing pipeline; the sealing flushing pipeline is led out from two ends of the pump cover, and the two led-out ends are connected to the flushing holes of the mechanical sealing gland or the reserved filling flushing holes of the pump cover.
The sealing flushing part in the invention is divided into a structure with a throttling orifice plate and a structure without the throttling orifice plate.
Referring to fig. 1-1, the structure of the orifice plate with throttle includes: orifice plate 1, inside and outside joint of reducing 2, cutting ferrule formula cone thread straight-through pipe joint 3, seamless steel pipe 4, cutting ferrule formula cone thread end rectangular tube joint 5, orifice plate 1 direct mount is in the reservation of pump cover both sides washes the downthehole, inside and outside joint of reducing 2 and the reservation of pump cover both sides washes downthehole threaded connection fixed, cutting ferrule formula cone thread straight-through pipe joint 3 is connected with inside and outside joint of reducing 2 internal and external screw threads, cutting ferrule formula cone thread straight-through pipe joint 3 is connected through seamless steel pipe 4 with cutting ferrule formula cone thread end rectangular tube joint 5, cutting ferrule formula cone thread end rectangular tube joint 5 and pump cover sealed chamber department reserved wash the downthehole or machine seal press cover on wash the downthehole threaded connection.
Referring to fig. 2, the structure without the orifice plate includes: the cutting ferrule type taper thread straight-through pipe joint 3, the seamless steel pipe 4 and the cutting ferrule type taper thread end right-angle long pipe joint 5 are specifically connected in the following way: the cutting sleeve type cone thread straight-through pipe joint 3 is directly installed on reserved flushing holes on two sides of the pump cover in a threaded connection mode, the cutting sleeve type cone thread straight-through pipe joint 3 and the cutting sleeve type cone thread end right-angle long pipe joint 5 are connected through a seamless steel pipe 4, and the cutting sleeve type cone thread end right-angle long pipe joint 5 is in threaded connection with the reserved flushing holes on the sealing cavity of the pump cover or the flushing holes on the machine sealing pressure cover.
When the lift of the double suction pump is more than or equal to 70m, a sealing flushing structure with a throttling orifice plate is selected, and when the lift of the double suction pump is less than 70m, a sealing flushing structure without the throttling orifice plate is selected.
The pump cover and the sealed flushing pipeline adopt filler sealing or mechanical sealing. If the packing is selected for sealing, a packing flushing hole is formed in a reserved flushing boss of the pump cover, and a mechanical seal positioning groove is not machined at the sealing cavity; if mechanical seal is selected, a filling flushing hole is not formed on a reserved flushing boss of the pump cover, and a mechanical seal positioning groove is processed at the sealing cavity.
According to different specifications and types of lifts of the double suction pump, the sealing flushing part is divided into a structure with a throttling orifice plate and a structure without the throttling orifice plate. The sealing flushing pipeline is led out from two ends of the pump cover and is connected to the flushing hole of the mechanical sealing cover or the flushing hole of the reserved filling material of the pump cover. The sealing flushing pipeline replaces the conventional pipeline valve by an orifice plate which is accurately calculated, and in the early stage of design, one pump cover casting is considered to simultaneously satisfy two different sealing forms of mechanical seal and filling. The novel mechanical seal flushing structure is convenient to install, reduces the field operation difficulty, can avoid the operation of later-stage field adjustment of flushing water quantity, improves the product universality, reduces the cost in multiple directions, and is convenient for material management.
In the specific implementation process of the invention, the thickness of the boss of the pump cover in the figure 1-1 is thickened, and the stepped hole is formed, so that the effective thread depth of the pipe joint and the fixation of the throttle plate can be met by the external threaded hole, and the requirement of the wall thickness of the pump body can be met by the internal unthreaded hole.
The orifice plate bore diameter of FIG. 1-1 was precisely calculated and verified experimentally. The seamless steel pipe 4 in fig. 1-1 has no valve except the pipe joint on the sealed flushing pipeline which is bent in situ. In fig. 2, the boss of the pump cover at the position of the throttle plate 1 is thickened, and a stepped hole is formed, so that the effective thread depth of the pipe joint can be met by the external threaded hole.
The sealed flushing pipe of the seamless steel pipe 4 in fig. 2 is provided with no valve except the pipe joint.
In the positions of the right-angle long tube joints 5 of the clamping sleeve type cone thread ends in the figures 1 and 2, if packing sealing is selected, packing flushing holes are formed in a reserved flushing boss of a pump cover, and a mechanical seal positioning groove is not machined at the sealing cavity; if mechanical seal is selected, a filling flushing hole is not formed on a reserved flushing boss of the pump cover, and a mechanical seal positioning groove is processed at the sealing cavity.
The following is a specific implementation example:
Fig. 1 is a schematic diagram of a sealed flushing structure with an orifice plate, as shown in fig. 1, when the pump lift of a double suction pump is larger than 70m (reference), the sealed flushing structure with the orifice plate is selected, and the proper diameter of an inner hole of the orifice plate is selected according to the shaft diameter of a sealing position, the required sealed flushing water quantity and the lift value in fig. 3, at this time, the sealed flushing structure consists of the orifice plate 1, a reducing inner and outer joint 2, a cutting sleeve type conical thread straight-through pipe joint 3, a seamless steel pipe 4 and a cutting sleeve type conical thread end right-angle long pipe joint 5.
FIG. 2 is a schematic view of a seal flushing structure without an orifice plate according to the present invention. As shown in fig. 2, when the lift of the double suction pump is smaller than 70m (refer to), a sealing flushing structure without a throttle orifice plate is selected, and the sealing flushing structure consists of a clamping sleeve type taper thread end right-angle long pipe joint 3, a seamless steel pipe 4 and a clamping sleeve type taper thread straight-through pipe joint 5.
Fig. 3 is a graph showing that the reference value is accurately calculated for the diameter phi D of the inner hole of the orifice plate under different specification models, and as shown in fig. 3, the orifice plate inner hole diameter phi D is accurately calculated in the earlier stage under different sealing positions, different required sealing water flushing amounts and different lifts according to the full series models of the horizontal split double suction pump, and the appropriate orifice plate model is selected according to the corresponding model.
In the figures 1 and 2, a mechanical seal structure schematic diagram is left along a vertical central line, a filler structure schematic diagram is right along the vertical central line, if filler sealing is selected, a filler flushing hole is formed in a reserved flushing boss of a pump cover, and a mechanical seal positioning groove is not processed at a sealing cavity; if mechanical seal is selected, a filling flushing hole is not formed on a reserved flushing boss of the pump cover, and a mechanical seal positioning groove is processed at the sealing cavity.
Compared with the traditional sealing flushing structure, the flushing pipeline of the traditional single-stage double-suction horizontal split centrifugal pump is of a structure with ball valves, the ball valves are distributed on two sides of the top of the pump cover, the positions are high, the field operation difficulty is high, the water quantity is difficult to quantitatively control, and the flushing performance of the mechanical seal is affected; in addition, the universality of the mechanical seal and the packing pump cover is not considered in the initial design stage, so that the mold opening and material management cost is increased, and the product universality is reduced.
The foregoing has shown and described the basic principles and main features of the present invention and the advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the foregoing embodiments, which have been described in the foregoing embodiments and description merely illustrates the principles of the invention, and that various changes and modifications may be effected therein without departing from the spirit and scope of the invention as defined in the appended claims and their equivalents.
Claims (1)
1. The utility model provides a seal structure of orifice plate replacement valve which characterized in that: the sealing structure of orifice plate replacement valve is installed in the double entry pump, the sealing structure of orifice plate replacement valve includes: the sealing flushing part comprises a sealing flushing pipeline and a sealing flushing pipeline fitting matched with the sealing flushing pipeline; the sealing flushing pipeline is led out from two ends of the pump cover, and the two led-out ends are connected to the flushing holes of the mechanical sealing gland or the reserved filling flushing holes of the pump cover;
The structure of the orifice plate with throttle comprises: the device comprises an orifice plate, a reducing internal and external joint, a cutting sleeve type cone thread straight-through pipe joint, a seamless steel pipe and a cutting sleeve type cone thread end right-angle long pipe joint, wherein the orifice plate is directly arranged in reserved flushing holes on two sides of a pump cover, the reducing internal and external joint is fixedly connected with reserved flushing holes on two sides of the pump cover through threads, the cutting sleeve type cone thread straight-through pipe joint is connected with the reducing internal and external joint through threads, the cutting sleeve type cone thread straight-through pipe joint is connected with the cutting sleeve type cone thread end right-angle long pipe joint through the seamless steel pipe, and the cutting sleeve type cone thread end right-angle long pipe joint is connected with flushing holes reserved at a sealing cavity of the pump cover or flushing holes on a machine sealing pressure cover through threads;
when the lift of the double suction pump is more than or equal to 70m, selecting a sealing flushing structure with a throttling orifice plate;
the pump cover and the sealing flushing pipeline adopt filler sealing or mechanical sealing;
If the packing is selected for sealing, a packing flushing hole is formed in a reserved flushing boss of the pump cover, and a mechanical seal positioning groove is not machined at the sealing cavity; if mechanical seal is selected, a filling flushing hole is not formed on a reserved flushing boss of the pump cover, and a mechanical seal positioning groove is processed at the sealing cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011569816.8A CN112628187B (en) | 2020-12-26 | 2020-12-26 | Sealing structure of throttle orifice plate for replacing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011569816.8A CN112628187B (en) | 2020-12-26 | 2020-12-26 | Sealing structure of throttle orifice plate for replacing valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112628187A CN112628187A (en) | 2021-04-09 |
| CN112628187B true CN112628187B (en) | 2024-05-14 |
Family
ID=75325269
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011569816.8A Active CN112628187B (en) | 2020-12-26 | 2020-12-26 | Sealing structure of throttle orifice plate for replacing valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112628187B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201751596U (en) * | 2010-06-13 | 2011-02-23 | 西安航天泵业有限公司 | Mechanical seal flushing device for a high pressure pump |
| CN202001396U (en) * | 2011-03-21 | 2011-10-05 | 天津市聚能高压泵有限公司 | Flushing device of mechanical seal for high pressure pump |
| CN109505804A (en) * | 2018-12-25 | 2019-03-22 | 三联泵业股份有限公司 | Cooling water carries out the pipeline of cooling protection to mechanical seal and casing ring |
| CN214577889U (en) * | 2020-12-26 | 2021-11-02 | 上海凯泉泵业（集团）有限公司 | Sealing structure for replacing valve with orifice plate |
| CN115263762A (en) * | 2022-08-30 | 2022-11-01 | 上海凯泉泵业（集团）有限公司 | Single-stage double-suction centrifugal pump with additional sealing cavity structure |
-
2020
- 2020-12-26 CN CN202011569816.8A patent/CN112628187B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201751596U (en) * | 2010-06-13 | 2011-02-23 | 西安航天泵业有限公司 | Mechanical seal flushing device for a high pressure pump |
| CN202001396U (en) * | 2011-03-21 | 2011-10-05 | 天津市聚能高压泵有限公司 | Flushing device of mechanical seal for high pressure pump |
| CN109505804A (en) * | 2018-12-25 | 2019-03-22 | 三联泵业股份有限公司 | Cooling water carries out the pipeline of cooling protection to mechanical seal and casing ring |
| CN214577889U (en) * | 2020-12-26 | 2021-11-02 | 上海凯泉泵业（集团）有限公司 | Sealing structure for replacing valve with orifice plate |
| CN115263762A (en) * | 2022-08-30 | 2022-11-01 | 上海凯泉泵业（集团）有限公司 | Single-stage double-suction centrifugal pump with additional sealing cavity structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112628187A (en) | 2021-04-09 |
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