CN203596687U - Wet type submersible pump - Google Patents
Wet type submersible pump Download PDFInfo
- Publication number
- CN203596687U CN203596687U CN201320681557.7U CN201320681557U CN203596687U CN 203596687 U CN203596687 U CN 203596687U CN 201320681557 U CN201320681557 U CN 201320681557U CN 203596687 U CN203596687 U CN 203596687U
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- end cover
- submersible pump
- wet type
- motor
- pressure regulator
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Abstract
The utility model discloses a wet type submersible pump comprising a pump body and a motor connected together; the motor comprises a housing, an upper end cap, a lower end cap and a rotary shaft; a single mechanical seal device is arranged in a connecting portion between the upper end cap and the rotary shaft; the single mechanical seal device comprises a fixed ring, a movable ring, a flat pad and a clamp ring in sequence, and also comprises a rubber pressure regulating film; one end of the rubber pressure regulating film is sleeved outside the movable ring; a spring is arranged outside the rubber pressure regulating film; a winding joint wire is arranged in the motor, penetrates the housing or the lower end cap, and is connected in a sealing manner; a water injection hole is arranged on the housing, and is detachably connected with a sealing member. The wet type submersible pump is an injected water type, no chemical reaction and rusting will happen to the parts in the motor, thereby improving service life of the submersible pump.
Description
Technical field
The utility model relates to immersible pump technical field, is specifically related to a kind of wet type submersible pump.
Background technology
In prior art, immersible pump mainly comprises dry submersible pump and wet type submersible pump.The motor seal of dry submersible pump is waterproof, each parts of motor are difficult for getting rusty, motor mainly reaches the object of heat radiation by cooling casing, the in the situation that of immersible pump excess load, spread of voltage, the motor temperature of immersible pump raises, immersible pump after the operating state of expanding with heat and contract with cold, the sealing variation of motor, the motor of sealing is easily permeable, thus the phenomenon such as cause that motor burns out; The motor internal water-filling of wet type submersible pump, the main water by motor internal reaches the object of heat radiation, can solve in the situation that voltage is low, motor cisco unity malfunction, the problem that power consumption is large, still, once immersible pump quits work, leave after the water surface, the water in motor can flow backwards out, makes the parts such as the bearing, rotor, stator of motor contact with air and chemical reaction occurs, thereby the phenomenon of getting rusty, easily causes the problems such as motor is stuck.
Utility model content
The purpose of this utility model is to overcome above shortcoming, and a kind of wet type submersible pump is provided, and this immersible pump is water injection type, i.e. water-filling all the time in electric machine casing, and in motor can not there is chemical reaction and get rusty in each parts, thus the useful life of having improved immersible pump.
The technical solution of the utility model is:
A kind of wet type submersible pump, comprise the pump housing and the motor that are connected, described motor comprises housing, upper end cover, bottom end cover and rotation axis, described upper end cover is connected with the pump housing, described rotation axis runs through described upper end cover, the junction of described upper end cover and described rotation axis is provided with single-end surface mechanical sealing device, and described single-end surface mechanical sealing device comprises stationary ring, rotating ring, plain cushion, snap ring successively; Described single-end surface mechanical sealing device also comprises a rubber pressure regulator membrane, described rubber pressure regulator membrane is I shape, one end of described rubber pressure regulator membrane is set in outside described rotating ring, the other end of described rubber pressure regulator membrane contacts with described stationary ring, described rubber pressure regulator membrane is outside equipped with spring, and described rotating ring, rubber pressure regulator membrane are connected with described rotation axis respectively;
In described motor, include winding joint line, described winding joint line runs through described housing or bottom end cover, and is connected and sealed;
On described housing, be provided with water injection hole, the described water injection hole seal that removably connects.
Preferably, described rubber pressure regulator membrane is connected by interference fit with described rotation axis.
Further, the diameter of described rotation axis increases to connecting single-end surface mechanical sealing device section gradually from connecting pump housing section.
Preferably, on described rotation axis, the difference of maximum gauge and minimum diameter is 0.1-1mm.
Further, described bottom end cover is provided with winding joint line and portals, described winding joint line portals and is connected with an expanded rubber circle, hole number on described expanded rubber circle is corresponding with the quantity of winding joint line in motor, and the diameter of described every winding joint line is greater than the diameter in the hole on described expanded rubber circle.
Further, described bottom end cover is provided with Baltimore groove, in described Baltimore groove, is provided with capacitor, and described capacitor is connected with described winding joint line, and described bottom end cover connects a base of capacitor, and described capacitor is by bottom end cover and base of capacitor sealing.
Further, described seal is air bolt.
Further, described single-end surface mechanical sealing device is outside equipped with annular filter screen, and described annular filter screen is connected with the described pump housing.
Further, described stationary ring is graphite annulus, and described stationary ring is arranged with rubber ring outward; Described rotating ring is ceramic ring.
Further, described upper end cover, bottom end cover are connected by Precise Flangers respectively with housing.
The wet type submersible pump that the utility model provides, tool has the following advantages:
1, the wet type submersible pump that the utility model provides, belongs to water injection type, and in motor, each parts can not chemical reaction occur and get rusty, thus the useful life of having improved immersible pump.The wet type submersible pump that the utility model provides, the sealing of motor lays respectively at upper end cover and bottom end cover, and wherein, the sealing of upper end cover adopts single mechanical end face seal, and its structure is: sealing device comprises stationary ring, rotating ring, plain cushion, snap ring successively; Described single-end surface mechanical sealing device also comprises a rubber pressure regulator membrane, described rubber pressure regulator membrane is I shape, one end of described rubber pressure regulator membrane is set in outside described rotating ring, the other end of described rubber pressure regulator membrane contacts with described stationary ring, described rubber pressure regulator membrane is outside equipped with spring, and described stationary ring, rotating ring, plain cushion, snap ring, rubber pressure regulator membrane are connected with described rotation axis respectively.In single-end surface mechanical sealing device, rotating ring, rubber pressure regulator membrane, spring assembly, form rotating ring hermetically-sealed construction, and rubber pressure regulator membrane and rotation axis are connected, rubber pressure regulator membrane and rotation axis are combined closely, thereby make rotating ring hermetically-sealed construction entirety rotate, not become flexible with rotation axis; Simultaneously, in the time that motor temperature changes, rotation axis is through process of expansion and contraction, due to the characteristic of rubber pressure regulator membrane itself, remain with rotation axis and combine closely, thereby the impurity such as the sand in water can not entered in electric machine casing from sealing device, and the water being full of in electric machine casing also can not spill from sealing device.Vertical section of I shape rubber pressure regulator membrane arranges spring outward, can play compensating action to the wearing and tearing of stationary ring, makes stationary ring keep good contacting with the end face of rubber pressure regulator membrane, improves sealing property.Particularly, in the time that rubber pressure regulator membrane is connected by interference fit with rotation axis, both connection compactnesses have been increased; When the diameter of rotation axis is from connecting pump housing section when connecting single-end surface mechanical sealing device section and increase gradually, in installation single-end surface mechanical sealing device process, rubber pressure regulator membrane is more and more tightr with being connected of rotation axis, in the time arriving the installation site of sealing device, it is maximum that the diameter of rotation axis reaches, and further improves both connection compactnesses.
In motor, include winding joint line, winding joint line runs through described housing or bottom end cover, and is connected and sealed; Thereby the water being full of in motor can not spilt from winding joint line exit;
On electric machine casing, be provided with water injection hole, the described water injection hole seal that removably connects.The seal at dismounting water injection hole place, makes to be full of in casing cooling water, and then installs seal and can realize the sealing of water injection hole.Water pump can reach the requirement that fills water in process of production.
The wet type submersible pump that the utility model provides, upper end cover and rotation axis junction, the outlet of winding joint line, water injection hole at motor seal respectively, and sealing effectiveness is better, cooling water in motor can be spilt in no instance, in the each parts of cooling motor, the each parts of motor not can with air generation chemical reaction, thereby reach the object that improves immersible pump useful life.
2, the wet type submersible pump that the utility model provides, the good sealing effect in winding joint line exit.The hermetically-sealed construction of winding joint line outlet is: described bottom end cover is provided with winding joint line and portals, described winding joint line portals and is connected with an expanded rubber circle, hole count on described expanded rubber circle is corresponding with the quantity of winding joint line in motor, and the diameter of described every winding joint line is greater than the diameter in the hole on described expanded rubber circle.Expanded rubber circle and the outlet of winding joint line are connected, and make the inwall close contact of expanded rubber circle and the outlet of winding joint line; And the diameter of winding joint line is greater than the diameter in the hole on expanded rubber circle, winding joint line is connected tightr with the hole on expanded rubber circle, the good sealing effect in winding joint line exit.Winding joint line passes from bottom end cover, by winding joint linear sealing device is set at bottom end cover, the water in casing can not flowed out from bottom end cover and winding joint line exit, thereby has further strengthened the sealing effectiveness of motor.
3, the wet type submersible pump that the utility model provides, adopt single mechanical end face seal, and the bearing of motor is arranged on upper end cover below at the upper end cover of motor, and single mechanical end face seal is by extraneous water lubrication.Compared with the oil sealing of available technology adopting, simple in structure, even and sealing device be damaged, can not occur in oily water leaking-in, the phenomenon of polluted source yet; Or cause the phenomenons such as water pump corrosion.
The wet type submersible pump that the utility model provides, mechanical single seal device is arranged on upper end cover, is arranged on the position that rotation axis is connected with bearing compares with sealing device in prior art, and simple in structure, sealing device is changed easily, and sealing effectiveness is better.
4, the wet type submersible pump that the utility model provides, can provide stable power supply, realizes effect of power and energy saving.The wet type submersible pump that the utility model provides, bottom end cover is provided with Baltimore groove, is provided with capacitor in Baltimore groove, and capacitor is connected with winding joint line, and bottom end cover connects a base of capacitor, and capacitor is by bottom end cover and base of capacitor sealing.Be connected with capacitor by winding joint line, capacitor can provide more stable voltage for motor, thereby motor is run well for a long time.Capacitor and motor integral setting, and carry out waterproof sealing processing, assurance capacitor is normally worked, and capacitor is changed conveniently.
5, the wet type submersible pump that the utility model provides, by selecting the material of stationary ring and rotating ring, reduces the wearing and tearing in mechanical single seal device busy.The wet type submersible pump that the utility model provides, stationary ring is graphite annulus, and rotating ring is ceramic ring, and the resistance to wear of stationary ring and rotating ring is good, and wearing and tearing are few at work, long service life.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme of the utility model embodiment, below the accompanying drawing of required use during embodiment is described is briefly described, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the structural representation of the utility model wet type submersible pump;
Fig. 2 is the structural representation of single-end surface mechanical sealing device in the utility model;
Fig. 3 is the structural representation of bottom end cover in the utility model;
Fig. 4 is the plan structure schematic diagram of Fig. 3;
Reference numeral: the 1-pump housing, 2-motor, 3-housing, 4-upper end cover, 5-bottom end cover, 6-rotation axis, 7-single-end surface mechanical sealing device, 8-stationary ring, 9-rotating ring, 10-plain cushion, 11-snap ring, 12-rubber pressure regulator membrane, 13-spring, 14-expanded rubber circle, the hole on 15-expanded rubber circle, 16-winding joint line, 17-screw thread, 18-water injection hole, 19-spring base, 20-Baltimore groove, 21-capacitor, 22-base of capacitor, 23-annular filter screen, 24-bearing.
Embodiment
To the technical scheme in the utility model embodiment be clearly and completely described below, obviously, described embodiment is only the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment obtaining under creative work prerequisite, all belong to the scope of the utility model protection.
Embodiment:
In conjunction with Fig. 1 to Fig. 4, a kind of wet type submersible pump, comprise the pump housing 1 and the motor 2 that are connected, motor 2 comprises housing 3, upper end cover 4, bottom end cover 5 and rotation axis 6, upper end cover 4 is connected with the pump housing 1, rotation axis 6 runs through upper end cover 4, and upper end cover 4 is provided with single-end surface mechanical sealing device 7 with the junction of rotation axis 6, and single-end surface mechanical sealing device 7 comprises stationary ring 8, rotating ring 9, plain cushion 10, snap ring 11 successively; Single-end surface mechanical sealing device 7 also comprises a rubber pressure regulator membrane 12, rubber pressure regulator membrane 12 is I shape, one end of rubber pressure regulator membrane 12 is set in outside rotating ring 9, the other end of rubber pressure regulator membrane 12 contacts with stationary ring 8, rubber pressure regulator membrane is outside equipped with spring 13, and rotating ring 9, rubber pressure regulator membrane 12 are connected with rotation axis 6 respectively; Wherein, rotating ring 9, rubber pressure regulator membrane 12, spring 13 are combined to form rotating ring hermetically-sealed construction, and spring is arranged on outside vertical section of I shape rubber pressure regulator membrane, and plain cushion 10, snap ring 11 are for the position of fixing rotating ring hermetically-sealed construction and stationary ring;
In motor, include winding joint line 16, winding joint line 16 runs through housing 3 or bottom end cover 5, and is connected and sealed;
On housing 3, be provided with water injection hole 18, water injection hole 18 seal that removably connects, in accompanying drawing, does not express the structure of seal.
In single-end surface mechanical sealing device 7, rotating ring 9, rubber pressure regulator membrane 12, spring 13 combine, and form rotating ring hermetically-sealed construction, and rubber pressure regulator membrane 12 is connected with rotation axis 6, rubber pressure regulator membrane 12 and rotation axis 6 are combined closely, thereby make rotating ring hermetically-sealed construction entirety rotate, not become flexible with rotation axis; Simultaneously, in the time that motor temperature changes, rotation axis is diameter generation slight change after process of expansion and contraction, due to the characteristic of rubber pressure regulator membrane itself, remain with rotation axis and combine closely, thereby the impurity such as the sand in water can not entered in electric machine casing from sealing device, and the water being full of in electric machine casing also can not spill from sealing device.Vertical section of I shape rubber pressure regulator membrane arranges spring outward, can play compensating action to the wearing and tearing of stationary ring, makes stationary ring keep good contacting with the end face of rubber pressure regulator membrane, improves sealing property.
In motor, include winding joint line, winding joint line runs through described housing or bottom end cover, and is connected and sealed; Thereby the water being full of in motor can not spilt from winding joint line exit;
The wet type submersible pump that the utility model provides, upper end cover and rotation axis junction, the outlet of winding joint line, water injection hole at motor seal respectively, and sealing effectiveness is better, cooling water in motor can be spilt in no instance, in the each parts of cooling motor, the each parts of motor not can with air generation chemical reaction, thereby reach the object that improves immersible pump useful life.
The wet type submersible pump that the utility model provides, the bearing 24 of motor is separately positioned on upper end cover below and bottom end cover top, and single-end surface mechanical sealing device 7 is arranged on the upper end cover place of motor, and single mechanical end face seal is by extraneous water lubrication.Compared with the oil sealing of available technology adopting, simple in structure, even and sealing device be damaged, can not occur in oily water leaking-in, the phenomenon of polluted source yet; Or cause the phenomenons such as water pump corrosion.Single-end surface mechanical sealing device is arranged on upper end cover position, is arranged on the position that rotation axis is connected with bearing compares with sealing device in prior art, and simple in structure, sealing device is changed easily, and sealing effectiveness is better.
Preferably, rubber pressure regulator membrane 12 is connected by interference fit with rotation axis 6, has increased both connection compactnesses, thereby has improved sealing effectiveness.
In the present embodiment, the diameter of rotation axis 6 increases to connecting 7 sections of single-end surface mechanical sealing devices gradually from connecting pump housing section, shown in drawings attached 1, the diameter of rotation axis increases from top to bottom successively, in installation single-end surface mechanical sealing device process, rubber pressure regulator membrane is more and more tightr with being connected of rotation axis, in the time arriving the installation site of sealing device, it is maximum that the diameter of rotation axis reaches, and further improves both connection compactnesses.Preferably, on rotation axis 6, the difference of maximum gauge and minimum diameter is 0.1-1mm, and within the scope of this, rubber pressure regulator membrane 12 can keep its characteristic in good condition.According to factors such as the installation lengths of the material of rubber pressure regulator membrane 12 and rotation axis, determine that the diameter of rotation axis is poor, its difference in diameter can be 1mm, 0.15mm, 0.56mm, 0.47mm, 0.85mm.
In the present embodiment, the two ends of rubber pressure regulator membrane 12 are respectively arranged with spring base 19, and spring 13 supports by spring base 19.Spring base 19 is set in respectively the outside at rubber pressure regulator membrane two ends, also has the effect that protection rubber pressure regulator membrane is not destroyed by spring.
Preferably, bottom end cover 5 is provided with winding joint line and portals, winding joint line portals and is connected with an expanded rubber circle 14, and hole 15 quantity on expanded rubber circle are corresponding with the quantity of winding joint line 16, and the diameter of every winding joint line 16 is greater than the diameter in the hole 15 on expanded rubber circle; The inwall that winding joint line portals is provided with screw thread 17, and winding joint line passes after bottom end cover, installs expanded rubber circle 14, then connects precision bolt by screw thread 17, further fixes expanded rubber circle 14.
In the hermetically-sealed construction of winding joint line outlet, expanded rubber circle and the outlet of winding joint line are connected, and make the inwall close contact of expanded rubber circle and the outlet of winding joint line; And the diameter of winding joint line is greater than the diameter in the hole on expanded rubber circle, winding joint line is connected tightr with the hole on expanded rubber circle, the good sealing effect in winding joint line exit.Winding joint line passes from bottom end cover, by winding joint linear sealing device is set at bottom end cover, the water in casing can not flowed out from bottom end cover, winding joint line exit, thereby has further strengthened the sealing effectiveness of motor.
In the present embodiment, bottom end cover 5 is provided with Baltimore groove 20, is provided with capacitor 21 in Baltimore groove 20, and bottom end cover 5 connects a base of capacitor 22, and capacitor 21 seals by bottom end cover 5 and base of capacitor 22.Be connected with capacitor 21 by winding joint line 16, capacitor 21 can provide more stable voltage for motor, thereby motor is run well for a long time.Capacitor 21 is wholely set with motor 2, and carries out waterproof sealing processing, and assurance capacitor is normally worked, and capacitor is changed conveniently.
Base of capacitor 22 with the installation connected mode of bottom end cover 5 can be: bottom end cover 5 is connected by Precise Flangers with housing 3, and junction adopts the sealing of O RunddichtringO, and base of capacitor 22 covers with bottom end cover 5, and seal is same O RunddichtringO.Capacitor line outlet can be arranged on the side of base of capacitor 22, and same, this outlet also needs through encapsulation process, and hermetically-sealed construction can be rubber blanket and precision bolt combination.
In the present embodiment, the seal that water injection hole 18 removably connects is air bolt, and air bolt can carry out tightly water injection hole; Meanwhile, water injection hole also has the effect of measuring air pressure.After water pump installs, open water injection hole, squeeze into certain air pressure, by whole motor submergeds, housing and sealing place are emerged without bubble, prove that motor seals completely, tighten air bolt after then filling clear water, make in the housing of motor water-filling all the time.
In the present embodiment, single-end surface mechanical sealing device 7 is outside equipped with annular filter screen 23, and annular filter screen 23 is connected with the pump housing 1.Annular filter screen has filtration, and the larger impurity of volume containing in energy filtered water, can avoid the normal operation of this type of impurity effect motor.
In the present embodiment, stationary ring 8 can be graphite annulus, the outer rubber ring that is arranged with of stationary ring 8; Rotating ring 9 can be ceramic ring.The outer sheathed rubber ring of stationary ring 8, can improve the compactness that is connected of stationary ring and upper end cover, further improves sealing property.And stationary ring is selected graphite material, rotating ring Ceramics material, the resistance to wear of stationary ring and rotating ring is good, by selecting the material of stationary ring and rotating ring, reduces the wearing and tearing in mechanical single seal device busy, thereby can extend the useful life of rotating ring and stationary ring.
In the present embodiment, the connected mode of housing 3 and upper end cover 4 is identical with the connected mode of housing 3 and bottom end cover 5, all can connect for Precise Flangers.
In the utility model, upper end cover 4 is connected with the pump housing, and when use, motor is positioned at the below of the pump housing, can prevent the dry combustion method phenomenon causing because of lack of water.
The foregoing is only preferred embodiment of the present utility model, not in order to limit the utility model, all any modifications of doing, be equal to replacement etc., within all should being included in protection range of the present utility model in protection range of the present utility model.
Claims (10)
1. a wet type submersible pump, comprises the pump housing and the motor that are connected, and described motor comprises housing, upper end cover, bottom end cover and rotation axis, and described upper end cover is connected with the pump housing, and described rotation axis runs through described upper end cover, it is characterized in that,
The junction of described upper end cover and described rotation axis is provided with single-end surface mechanical sealing device, and described single-end surface mechanical sealing device comprises stationary ring, rotating ring, plain cushion, snap ring successively; Described single-end surface mechanical sealing device also comprises a rubber pressure regulator membrane, described rubber pressure regulator membrane is I shape, one end of described rubber pressure regulator membrane is set in outside described rotating ring, the other end of described rubber pressure regulator membrane contacts with described stationary ring, described rubber pressure regulator membrane is outside equipped with spring, and described rotating ring, rubber pressure regulator membrane are connected with described rotation axis respectively;
In described motor, include winding joint line, described winding joint line runs through described housing or bottom end cover, and is connected and sealed;
On described housing, be provided with water injection hole, the described water injection hole seal that removably connects.
2. wet type submersible pump according to claim 1, is characterized in that, described rubber pressure regulator membrane is connected by interference fit with described rotation axis.
3. wet type submersible pump according to claim 2, is characterized in that, the diameter of described rotation axis increases to connecting single-end surface mechanical sealing device section gradually from connecting pump housing section.
4. wet type submersible pump according to claim 3, is characterized in that, on described rotation axis, the difference of maximum gauge and minimum diameter is 0.1-1mm.
5. wet type submersible pump according to claim 1, it is characterized in that, described bottom end cover is provided with winding joint line and portals, described winding joint line portals and is connected with an expanded rubber circle, hole number on described expanded rubber circle is corresponding with the quantity of described winding joint line, and the diameter of described every winding joint line is greater than the diameter in the hole on described expanded rubber circle.
6. wet type submersible pump according to claim 5, it is characterized in that, described bottom end cover is provided with Baltimore groove, in described Baltimore groove, be provided with capacitor, described capacitor is connected with described winding joint line, described bottom end cover connects a base of capacitor, and described capacitor is by bottom end cover and base of capacitor sealing.
7. wet type submersible pump according to claim 1, is characterized in that, described seal is air bolt.
8. according to the wet type submersible pump described in any one in claim 1 to 7, it is characterized in that, described single-end surface mechanical sealing device is outside equipped with annular filter screen, and described annular filter screen is connected with the described pump housing.
9. according to the wet type submersible pump described in any one in claim 1 to 7, it is characterized in that, described stationary ring is graphite annulus, and described stationary ring is arranged with rubber ring outward; Described rotating ring is ceramic ring.
10. according to the wet type submersible pump described in any one in claim 1 to 7, it is characterized in that, described upper end cover, bottom end cover are connected by Precise Flangers respectively with housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320681557.7U CN203596687U (en) | 2013-10-30 | 2013-10-30 | Wet type submersible pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320681557.7U CN203596687U (en) | 2013-10-30 | 2013-10-30 | Wet type submersible pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203596687U true CN203596687U (en) | 2014-05-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320681557.7U Withdrawn - After Issue CN203596687U (en) | 2013-10-30 | 2013-10-30 | Wet type submersible pump |
Country Status (1)
| Country | Link |
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| CN (1) | CN203596687U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103560608A (en) * | 2013-10-30 | 2014-02-05 | 湘潭市湘徽泵业有限公司 | Wet-type submersible pump |
-
2013
- 2013-10-30 CN CN201320681557.7U patent/CN203596687U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103560608A (en) * | 2013-10-30 | 2014-02-05 | 湘潭市湘徽泵业有限公司 | Wet-type submersible pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140514 Effective date of abandoning: 20160113 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |