CN2429663Y - Dry airtight sealed long shaft multi-stage underwater pump - Google Patents
Dry airtight sealed long shaft multi-stage underwater pump Download PDFInfo
- Publication number
- CN2429663Y CN2429663Y CN 00212401 CN00212401U CN2429663Y CN 2429663 Y CN2429663 Y CN 2429663Y CN 00212401 CN00212401 CN 00212401 CN 00212401 U CN00212401 U CN 00212401U CN 2429663 Y CN2429663 Y CN 2429663Y
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- main shaft
- ring
- flange seat
- major axis
- dry gas
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Abstract
The utility model relates to a dry air sealed multistage submerged pump with a long shaft. The utility model is characterized in that the lower end of a motor bracket which is provided with a bearing lubrication mechanism is fixed on a flange seat; the flange seat is provided with a main shaft sealing mechanism and an emergency sealing mechanism; a main shaft is provided with an abrasion resisting sheath connected with the main shaft; a pump body on the lower part of a branch pipe is provided with a balance disk; the lower end of the pump body is provided with a flow guiding grid; the lower end of the main shaft is provided with an inducing wheel. The utility model has the advantages of simple structure, safety, good tightness, high efficiency, energy saving, and convenient maintenance.
Description
The utility model relates to a kind of pump, particularly Under Water Pumps.
Industries such as present domestic chemical industry all adopt the canned motorpump of import or joint venture's production to the pressurized delivered of poisonous, harmful, inflammable, explosive or corrosive liquids.The shortcoming that facts have proved this pump is as follows: 1. to medium inlet pressure, outlet pressure, temperature and cleanliness requirement condition harshness, 2. net positive suction head is required height, 3. pressure resistance is on the low side, and 4. 5. complex structure, complex operation, maintenance difficult inhale the journey weak point.
The purpose of this utility model is to provide a kind of safe and reliable, good seal performance that is fit to various operating modes, lift height, dry gas seals major axis multi-level submerged pump simple to operate, easy to maintenance.
The purpose of this utility model can realize by following measure: a kind of dry gas seals major axis multi-level submerged pump, the upper end that its main shaft that is positioned at pump housing center passes flange seat can link to each other with the motor on the electric machine support of establishing bearing lubrication mechanism, the bottom links to each other with multi-stage impeller, on the pump housing on multi-stage impeller top, be provided with the output arm that extends upward and exceed flange seat, it is characterized in that: the electric machine support lower end is fixed on the flange seat, this flange seat is provided with main shaft seal mechanism, its sealed case is fixed on the flange seat of the pump housing by the fastening piece that passes it, its part that is positioned at casing of main shaft of passing the casing center hole is provided with cover axle sleeve thereon, it is positioned on the outer barrel of sealed case and links to each other with main shaft by the Cock screw on the coupled positioning ring, outside axle sleeve, be provided with the rotating ring that is placed on it and fixedlys connected with it by link, the seal face of rotating ring be enclosed within main shaft on and the seal face that is fixed on the stationary ring on the casing relative, its part near inner ring surface of the seal face of this stationary ring is the plane, remaining anchor ring is provided with the spiral type groove of interruption, is provided with 3～4 uniform springs on another end face of rotating ring or stationary ring.Seal case is provided with the interface that links to each other with the pressed gas conduit, and this interface is by duct and sealed case intracavity inter-connection in the casing.Be provided with urgent sealing mechanism on the flange seat below main shaft seal mechanism.In the pump housing on output arm top, be provided with Balance disc.Pump housing lower end is provided with airflow fence.The main shaft lower end is provided with inducer.Between rotating ring and spring, be provided with the pressure ring that is enclosed within on the axle sleeve.
The utility model mainly is that main shaft seal mechanism, urgent sealing mechanism, bearing lubrication mechanism, main shaft abrasionproof sheath, Balance disc, airflow fence and inducer etc. are set on the basis of existing multi-level submerged pump.
Wherein axial sealing mechanism is dry gas mechanical seal, and it mainly includes: sealed case, axle sleeve, positioning ring, stationary ring, spring and pressure ring.Sealed case is fixed on the flange seat of the pump housing by the fastening piece that passes it.Its part that is positioned at casing of main shaft of passing the casing center hole is provided with cover axle sleeve thereon, and this axle sleeve is positioned at the outer barrel of sealed case and connects together by Cock screw on the coupled positioning ring and main shaft, makes it to rotate synchronously with main shaft.Rotating ring outside axle sleeve, is provided with the rotating ring that is placed on it and fixedlys connected with it by link, so can rotate synchronously with main shaft.This graphite rotating ring can be provided with 1～3 as required.It is sealing surface that each rotating ring all has an anchor ring, it be enclosed within main shaft on and to be fixed on the casing seal face of stationary ring relative.Its part near inner ring surface of the seal face of this stationary ring is the plane, and remaining anchor ring is provided with the spiral type groove of interruption.When rotating ring during with main axis rotation, compression forms air film to gas to the center in the spiral type groove, two end faces that rotating ring is relative with stationary ring separately, and for two end faces of relative movement lubricated.The rigidity that gas produced of high speed rotating stops entering of other gas again simultaneously, has so just guaranteed sealing of spindles effectively.For rotating ring and stationary ring are kept in touch, on the other end of rotating ring or stationary ring, be provided with 3～4 uniform springs.Because rotating ring is the graphite material poor rigidity, is provided with the pressure ring that is enclosed within on the axle sleeve between rotating ring and spring.Also can be provided with the interface that links to each other with the pressed gas conduit in addition on seal case, this interface is by duct and sealed case intracavity inter-connection in the casing.Can in sealed case, feed sealing gas like this, make external pressure, to guarantee that the gas in the pump can be not excessive greater than the pump internal pressure.
Be provided with below main shaft seal mechanism by link and be fixed on urgent sealing mechanism on the flange seat, it mainly includes rubber seal capsule, urgent sealing gland seat and pressed gas conduit.The pressed gas conduit that wherein is fixed on the flange seat is connected with through hole in the urgent sealing gland seat by the duct in the flange seat, be covered with the rubber seal capsule that can contact in this urgent sealing gland seat outside with main shaft, when mechanical seal inefficacy or blanket gas underpressure, the external source pressed gas fills rubber bag tank to rise embraces axle, with the leakage of rapid blocking-up fed sheet of a media gas.
Be positioned at the automatic cycling mechanism of lubricant oil of pump housing upper motor support, it mainly includes: oil cylinder, gland, axle sleeve, bearing pressure ring, oil filler pipe, permanent position lubricating cup and level meter.The oil cylinder that wherein is located on the interior supporting element of the pump housing is the housing that toroidal cavity is arranged, and the tubular madial wall has main shaft to pass, and is provided with the axle sleeve that tightens together with main shaft with top outside madial wall.This has the bottom of the ring-type axle sleeve center hole that main shaft passes to be provided with the cavity that the oil cylinder madial wall is contained and holds oil.Shrink to the oil cylinder madial wall this cavity lower end.Being provided with grease channel in addition in axle sleeve is oil guiding hole, and its lower ending opening is connected with cavity under the axle sleeve, and upper end open is positioned at bearing top.The bearing that is located between oil cylinder upper shed and the axle sleeve is located by bearing pressure ring and fastening piece.Establish the adjustment nut of adjusting the main shaft upper-lower position, the threaded engagement on its screw thread and the main shaft on the pressure ring of axle sleeve upper end.Be provided with the gland that its upper shed is covered on oil cylinder, its center hole has main shaft to pass.Also be provided with an end on the gland and be communicated with the oil circuit that the other end links to each other with oil filler pipe with the oil cylinder upper shed.The through hole the other end that this oil filler pipe passes the pump housing is positioned at outside the pump case.The automatically interior cycling mechanism of above-mentioned lubricant oil also is provided with the constant temperature lubricating cup, and the conduit that links to each other with lubricating cup passes the pump housing the other end and is connected with the oil cylinder bottom.Also be provided with the level meter of observing lubricant oil liquid level height in addition in this mechanism, the conduit that links to each other with level meter passes the pump housing the other end and is connected with the oil cylinder bottom.When main shaft drives the axle sleeve high speed rotating, be not only in-oil cylinder lubricant oil eddy flow, and the air of bearing top also eddy flow get up to form negative pressuren zone, so in-oil cylinder lubricant oil is just along its top of the up arrival of oil guiding hole.Under action of gravity, flow in the bearing it lubricatedly from the lubricant oil that oil guiding hole comes out again, drop down onto at last in the oil cylinder, formed lubricant oil automatically in circulation.Lubricant oil also is cooled in cyclic process, makes the oil temperature constant.
Main shaft abrasionproof sheath is a chemical stoneware or cemented carbide cylinder, it is located on the main shaft that is positioned at the sliding bearing axis hole, and connect together with it, the lower end of this abrasionproof sheath is provided with the fastening piece that prevent its displacement corresponding with it, as spring clip or setscrew nut etc.Because the anti-cover of abrasionproof is coated on the main shaft outside, makes main shaft directly not contact with sliding bearing when rotating, and has so also just fundamentally solved the wear problem of main shaft.
Be provided with Balance disc in the pump housing on arm top, it mainly includes Moving plate and price fixing.The flange dish type Moving plate that has main shaft to pass in its central axis hole, the ring bodies on top is provided with radial direction through hole, is provided with the fastening piece that Moving plate and main shaft can be connected together in it.The downward anchor ring of Moving plate is corresponding with the annular price fixing sealing surface that following center hole has main shaft to pass.Drive the Moving plate rotation when main shaft rotates, itself and price fixing form movingly, can improve the main bearing operating mode, can throttling reduce volumetric loss again.
The airflow fence that is located at pump housing lower end mainly includes baffle plate, connecting plate and guide plate.Wherein baffle plate is an annular slab, is provided with perpendicular guide plate on baffle plate.They are radial equipartition and mutually disjoint.Be provided with the connecting plate parallel with baffle plate in the guide plate upper end, its anchor ring is provided with some through holes, and the fastening piece that passes through hole can be fixed on airflow fence the lower end of pump.This airflow fence can make and be transferred liquid and radially enter in the pump housing by axially becoming, avoid pump in the running liquid produce whirlpool and cause the cavitation or the dry grinding of pump, it can reduce the minimum conveying liquid level of medium simultaneously, is convenient to the storage tank emptying.
Be fixed on the inducer of main shaft lower end, mainly include wheel hub and blade, wherein wheel hub is axle sleeve shape, be enclosed within the lower end of main shaft, and be fixed thereon by fastening piece, being located at blade shape on the wheel hub can have multiplely, can select as required as screw piece, fin etc.This inducer can further reduce net positive suction head, to guarantee high-pressure delivery.
The utility model has following advantage compared to existing technology: safe and reliable, exhausted nothing is leaked, and energy-efficient, simple in structure, easy to maintenance, its flow can reach 800 meters
3/ hour, lift can reach 800 meters, inlet pressure and can reach 10MPa, operating temperature is-180 ℃～+ 150 ℃.
Drawing is described as follows:
Fig. 1 is that the utility model master looks generalized section.
Fig. 2 is the local enlarged diagram of main shaft seal mechanism example 1 among Fig. 1.
Fig. 3 is the schematic top plan view of stationary ring among Fig. 2.
Fig. 4 is the local enlarged diagram of the main shaft seal mechanism example 2 among Fig. 1.
Fig. 5 is the local enlarged diagram of the main shaft seal mechanism example 3 among Fig. 1.
Fig. 6 is the local enlarged diagram of the main shaft seal mechanism example 4 among Fig. 1.
Fig. 7 is the local enlarged diagram of the main shaft seal mechanism example 5 among Fig. 1.
Fig. 8 is the local enlarged diagram of Fig. 1 middle (center) bearing lubricating structure.
Fig. 9 is the local enlarged diagram of main shaft abrasionproof sheath mechanism among Fig. 1.
The utility model is described in further detail to utilize the example shown in the accompanying drawing.In the cross-sectional schematic of dry gas seals major axis multi-level submerged pump shown in Figure 1, the pump housing 1 upper end is an electric machine support 2, establishes bearing lubrication mechanism 3 in it.The electric machine support lower end is fixed on the flange seat 4 of the pump housing, establish main shaft seal mechanism 5 and urgent sealing mechanism 6 on this flange seat, its pressed gas conduit 7 that is fixed on the flange seat is connected with through hole in the urgent sealing gland seat 8 by the duct in the flange seat, at this urgent sealing gland seat outside cover rubber seal capsule 9, below urgent sealing gland seat and rubber seal capsule, be provided with the link that they are spacing 10.In the pump housing of flange seat and 11 of arms of output, establish main shaft abrasionproof sheath mechanism 12 on the main shaft in the sliding bearing axis hole.Main shaft 13 upper ends that are positioned at pump housing center can link to each other with the motor on the electric machine support, and the bottom links to each other 14 with multi-stage impeller, and is provided with sliding bearing 15 between rotor and the pump case.Be fixed with the wheel hub 16 of inducer on the main shaft below the impeller by fastening piece, this wheel hub is provided with fin shape blade 17.Pump housing lower end is provided with airflow fence 18, and its ring baffle 19 is provided with perpendicular guide plate 20, and they are radial equipartition.Be provided with connecting plate 21 in the guide plate upper end, its anchor ring is provided with through hole, and the fastening piece that passes through hole is fixed on airflow fence the lower end of pump.On the pump housing on multi-stage impeller top, be provided with the output arm that extends upward and exceed flange seat, in the pump housing on arm top, be provided with Balance disc, the ring bodies on Moving plate 22 tops is provided with radial direction through hole, is provided with fastening piece in it, and the downward anchor ring of Moving plate is corresponding with price fixing 23 sealing surfaces.
In the local enlarged diagram of hermetic seal major axis multi-level submerged pump main shaft seal mechanism example 1, sealed case 24 is fixed on the flange seat by the fastening piece that passes it shown in Figure 2.Its part that is positioned at casing of main shaft of passing the casing center hole is provided with cover axle sleeve 25 thereon, and this axle sleeve is positioned at the outer barrel of sealed case and is provided with screw, and the Cock screw on it also passes screw corresponding on the positioning ring 26.Outside axle sleeve, be provided with the graphite rotating ring 27 that is placed on it and fixedlys connected with it by link.This link is a rotating seat 28, and the annular solid that is provided with coaxial line with it in its cylindrical outer casing and is connected as a single entity, its center borehole jack are connected with axle sleeve on axle sleeve and by fastening piece 29.Be provided with 3 vertical slotted eyes on the annular solid of rotating seat, respectively establish a spring 30 in the hole, the spring upper end is provided with the pressure ring 31 that is enclosed within on the axle sleeve, and the following anchor ring of the top and rotating ring of this pressure ring is adjacent.The upper ring surface of rotating ring is a seal face, its be enclosed within main shaft on and to be fixed on the seal face of the stationary ring 32 on the casing by fastening piece relative.Its part near inner ring surface of the seal face of this stationary ring is that the plane also claims to seal dam 33, and remaining anchor ring is provided with the spiral type groove 34 of interruption, as shown in Figure 3.Above-mentioned single end face main shaft seal mechanism is suitable for the mesolow dielectric gas and uses.
In the local enlarged diagram of dry gas seals major axis multi-level submerged pump main shaft seal mechanism example 2 shown in Figure 4, sealed case is made up of the casing that two cavitys up and down communicate, they are fixed on the flange seat by fastening piece, and one group of rotating ring, stationary ring, pressure ring, spring and rotating seat in its upper box and the chamber are identical with example 1 structure.Also be provided with one group of rotating ring, stationary ring, pressure ring, spring and rotating seat identical in the nowel body cavity adjacent with example 1 structure with flange seat.Just also be provided with the interface 35 that links to each other with the pressed gas conduit on lower box, this interface is by duct and two sealed case intracavity inter-connections in the casing.On lower box, also be provided with the passage that links to each other with tail gas recycle interface 36.This tandem Double End main shaft seal mechanism, its external inert gas pressure is higher than more than the pressure medium gas 0.05MPa, and gas leakage direction like this is always towards medium.
In the local enlarged diagram of dry gas seals major axis multi-level submerged pump main shaft seal mechanism example 3 shown in Figure 5, lower box is fixed on the flange seat of the pump housing by the fastening piece that passes them on the sealed case that links to each other by fastening piece 37.Pass the main shaft of lower box center hole, its part that is positioned at casing is provided with cover axle sleeve thereon, and it is positioned at the outer barrel of sealed case and is provided with screw, and the Cock screw that cooperates with this screw also passes screw corresponding on the positioning ring.Outside axle sleeve, be provided with two envelope rotating seats, the annular solid that the middle part is provided with coaxial line with it and is connected as a single entity in its cylindrical outer casing, its center borehole jack is connected with it on axle sleeve and by locating stud.On two envelope rotating seat annular solids, be provided with 4 vertical through holes, respectively establish a spring in the hole, spring is respectively established a pressure ring in two ends up and down, each is adjacent with a graphite rotating ring that is enclosed within on the axle sleeve for their opposite side, the perisporium of this rotating ring is provided with uniform vertical groove, and it is corresponding with the projection 38 to central protuberance on two envelope rotating seat shells.The end faces that rotating ring is positioned at two envelope rotating seats outside are enclosed within on the main shaft with one respectively and the seal face that is fixed on the stationary ring on the casing matches.On seal case, be provided with in addition the interface that links to each other with the pressed gas conduit, be connected in this interface passing hole channel and the sealed case chamber.Said structure also is a Double End main shaft seal mechanism.
In the local enlarged diagram of dry gas seals major axis multi-level submerged pump main shaft seal mechanism example 4 shown in Figure 6, structure of lower box and positioning ring is identical with example 3 on it, just two circular grooves up and down of extension are established at the axle sleeve middle part on the main shaft, respectively establish a graphite rotating ring that is enclosed within on the axle sleeve in each groove, they connect together with axle sleeve by the pressure cap 39 that is stuck on the axle sleeve, the seal face of above-mentioned each rotating ring all be fixed on casing on the stationary ring sealing surface relative.And the stationary ring other end is adjacent with uniform spring.
In the local enlarged diagram of dry gas seals major axis multi-level submerged pump main shaft seal mechanism example 5 shown in Figure 7, it is fixed on the flange seat by the fastening piece that passes them by the upper-lower seal casing that fastening piece links to each other.Pass the main shaft of lower box center hole, it is positioned at the outer axle sleeve wall of sealed case and is provided with screw thread, and positioning ring is threaded with it, and Cock screw links to each other positioning ring again with main shaft.Be provided with three groups of springs, stationary ring, rotating ring and rotating seats in seal case, its spring all is located on the active box 40, is provided with stationary ring, rotating ring and rotating seat above it successively.Between two active boxes, be provided with spacer ring 41.Seal case is provided with the interface that links to each other with the pressed gas conduit, is connected in the sealing gas duct that links to each other with this interface and the last sealed case chamber.Should go up the sealed case cavity and also be provided with the passage that links to each other with the tail gas recycle interface.Above-mentioned three end face main shaft seal mechanisms are fit to high-pressure medium and use.
In the local enlarged diagram of the bearing lubrication mechanism of dry gas seals major axis multi-level submerged pump shown in Figure 8, oil cylinder 43 madial walls that are located on the interior supporting element 42 of the pump housing have main shaft to pass, outside the madial wall and top is provided with the axle sleeve 44 that tightens together with main shaft, is provided with pressure ring 45 thereon successively and adjusts nut 46.Have main shaft to pass in the axle sleeve center hole, this axle sleeve bottom is provided with the oil cylinder madial wall is comprised the also cavity of store oil.Be provided with oil guiding hole 47 in addition in axle sleeve, its lower ending opening is connected with the store oil cavity, and upper end open is positioned on the bearing.Between oil cylinder upper shed and axle sleeve, be provided with bearing 48, establish bearing pressure ring 49 on it.Be provided with gland 50 on oil cylinder, main shaft passes its center hole, also is provided with the dust cover 51 that connects together with main shaft on the gland.Also be provided with an end on the gland and be communicated with the oil circuit that the other end links to each other with oil filler pipe 52 with the oil cylinder upper shed.The through hole the other end that this oil filler pipe passes the pump housing is positioned at outside the pump case, and other has the conduit 54 that links to each other with permanent position lubricating cup 53 to pass the pump housing, and the other end is connected with the oil cylinder bottom.The conduit 56 that links to each other with level meter 55 passes the pump housing, and the other end is connected with the oil cylinder bottom.
In the local enlarged diagram of the main shaft abrasionproof sheath mechanism of dry gas seals major axis multi-level submerged pump shown in Figure 9, be enclosed within on the main shaft and by the chemical stoneware main shaft abrasionproof sheath 58 peripheral hardware sliding bearings 59 of spring clip 57 location, its outside is provided with the body of sliding bearing 60 that is fixed on the pump housing.The fastening piece 61 that passes this body of sliding bearing links to each other the body of sliding bearing with sliding bearing.The end, duct that links to each other with its middle part cooling hole 62 on this sliding bearing links to each other with balance tube 63.
Claims (7)
1, a kind of dry gas seals major axis multi-level submerged pump, the upper end that its main shaft that is positioned at pump housing center passes flange seat can link to each other with the motor on the electric machine support of establishing bearing lubrication mechanism, the bottom links to each other with multi-stage impeller, on the pump housing on multi-stage impeller top, be provided with the output arm that extends upward and exceed flange seat, it is characterized in that: the electric machine support lower end is fixed on the flange seat, this flange seat is provided with main shaft seal mechanism, its sealed case is fixed on the flange seat of the pump housing by the fastening piece that passes it, its part that is positioned at casing of main shaft of passing the casing center hole is provided with cover axle sleeve thereon, it is positioned on the outer barrel of sealed case and links to each other with main shaft by the Cock screw on the coupled positioning ring, outside axle sleeve, be provided with the rotating ring that is placed on it and fixedlys connected with it by link, the seal face of rotating ring be enclosed within main shaft on and the seal face that is fixed on the stationary ring on the casing relative, its part near inner ring surface of the seal face of this stationary ring is the plane, remaining anchor ring is provided with the spiral type groove of interruption, is provided with 3～4 uniform springs on another end face of rotating ring or stationary ring.
2, dry gas seals major axis multistage hydraulic pump according to claim 1, it is characterized in that: seal case is provided with the interface that links to each other with the pressed gas conduit, and this interface is by duct and sealed case intracavity inter-connection in the casing.
3, dry gas seals major axis multi-level submerged pump according to claim 1 and 2 is characterized in that: be provided with urgent sealing mechanism on the flange seat below main shaft seal mechanism.
4, dry gas seals major axis multi-level submerged pump according to claim 3 is characterized in that: be provided with Balance disc in the pump housing on output arm top.
5, dry gas seals major axis multi-level submerged pump according to claim 4, it is characterized in that: pump housing lower end is provided with airflow fence.
6, dry gas seals major axis multi-level submerged pump according to claim 5, it is characterized in that: the main shaft lower end is provided with inducer.
7, dry gas seals major axis multi-level submerged pump according to claim 1 and 2 is characterized in that: be provided with the pressure ring that is enclosed within on the axle sleeve between rotating ring and spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00212401 CN2429663Y (en) | 2000-06-22 | 2000-06-22 | Dry airtight sealed long shaft multi-stage underwater pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00212401 CN2429663Y (en) | 2000-06-22 | 2000-06-22 | Dry airtight sealed long shaft multi-stage underwater pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2429663Y true CN2429663Y (en) | 2001-05-09 |
Family
ID=33578916
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00212401 Expired - Fee Related CN2429663Y (en) | 2000-06-22 | 2000-06-22 | Dry airtight sealed long shaft multi-stage underwater pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2429663Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101975168A (en) * | 2010-11-05 | 2011-02-16 | 浙江科尔泵业股份有限公司 | Horizontal axial-suction sectional multistage high-pressure centrifugal pump |
| CN102062107A (en) * | 2010-12-13 | 2011-05-18 | 甘肃银光聚银化工有限公司 | Multi-stage axial flow submerged pump with long shaft and method for conveying phosgene |
| CN102943773A (en) * | 2012-11-19 | 2013-02-27 | 大耐泵业有限公司 | Optical air pump |
| CN106762801A (en) * | 2016-12-29 | 2017-05-31 | 宜都兴发化工有限公司 | A kind of axial-flow pump dry gas sealing system |
-
2000
- 2000-06-22 CN CN 00212401 patent/CN2429663Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101975168A (en) * | 2010-11-05 | 2011-02-16 | 浙江科尔泵业股份有限公司 | Horizontal axial-suction sectional multistage high-pressure centrifugal pump |
| CN102062107A (en) * | 2010-12-13 | 2011-05-18 | 甘肃银光聚银化工有限公司 | Multi-stage axial flow submerged pump with long shaft and method for conveying phosgene |
| CN102062107B (en) * | 2010-12-13 | 2012-08-29 | 甘肃银光聚银化工有限公司 | Multi-stage axial flow submerged pump with long shaft and method for conveying phosgene |
| CN102943773A (en) * | 2012-11-19 | 2013-02-27 | 大耐泵业有限公司 | Optical air pump |
| CN106762801A (en) * | 2016-12-29 | 2017-05-31 | 宜都兴发化工有限公司 | A kind of axial-flow pump dry gas sealing system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| FG1K | Grant of utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20010509 |