CN110145498A - A kind of pump L-type sealing centring means and its application method - Google Patents
A kind of pump L-type sealing centring means and its application method Download PDFInfo
- Publication number
- CN110145498A CN110145498A CN201910514247.8A CN201910514247A CN110145498A CN 110145498 A CN110145498 A CN 110145498A CN 201910514247 A CN201910514247 A CN 201910514247A CN 110145498 A CN110145498 A CN 110145498A
- Authority
- CN
- China
- Prior art keywords
- stuffing box
- pump
- arc panel
- packing sleeve
- centring means
- 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.)
- Granted
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 16
- 238000000034 method Methods 0.000 title claims description 10
- 238000012856 packing Methods 0.000 claims abstract description 54
- 238000009434 installation Methods 0.000 claims abstract description 26
- 239000000945 filler Substances 0.000 claims abstract description 20
- 230000013011 mating Effects 0.000 claims abstract description 10
- 210000004907 gland Anatomy 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 238000011900 installation process Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000013409 condiments Nutrition 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- F04D29/10—Shaft sealings
- F04D29/106—Shaft 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
- F04D29/60—Mounting; Assembling; Disassembling
- F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
- F04D29/628—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for liquid pumps
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The present invention relates to a kind of pump L-types to seal centring means, the installation of sealing packing device for Pulp pump, sealing packing device includes packing sleeve matched with the pump shaft of Pulp pump, stuffing box and the filler being set between packing sleeve and stuffing box, the centring means includes the mating setting of outer wall of inner circle and packing sleeve, the arc panel of the mating setting of the inner wall of outer circle and stuffing box and the ejecting unit being set on arc panel, arc panel is in minor arc shape, the protrusion of its axis is provided perpendicular in the outer circle of arc panel, protrusion forms the structure that cross section is L-type with arc panel, ejecting unit includes one group and is set in protrusion, liftout bolt matched with the side wall of stuffing box, the installation threaded hole of liftout bolt is provided in protrusion, it is quickly and expediently installed the sealing packing device of Pulp pump, it is high that precision is installed, prevent the generation of eccentric wear , effectively extend the service life of the pump housing.
Description
Technical field
The invention belongs to the mounting technique fields of Pulp pump, are related to a kind of centring means, and specifically a kind of pump uses L-type
Seal centring means and its application method.
Background technique
Pulp pump is chiefly used in conveying the mixture containing solid particle dreggy and water, when sealing packing device thereon by
Stuffing box, packing sleeve, packing ring, filler and gland composition, stuffing box outer circle one end and fixed liner plate are tightly connected, separately
One end is fixedly connected with the pump housing, and inner circle is fixedly connected through packing sleeve with pump shaft, be arranged on packing sleeve packing ring, filler and
Gland, so that packing ring and filler play sealing function when Pulp pump works normally, it is ensured that it pumps intracorporal liquid and does not leak,
It avoids wasting and pollute.It is high to the installation concentricity requirement between stuffing box and packing sleeve in installation process, it is existing
Mounting means is usually that multiple axis holes is arranged on fixed liner plate, filling box, passes through axis hole by multiple bolts and is installed,
But easily there is installation error in stuffing box, once stuffing box glances off, then be easy to cause uneven setting or even the bearing of filler
Eccentric wear, reduce the service life of the pump housing.
Summary of the invention
In view of the deficiencies of the prior art, the present invention provides a kind of pump L-types to seal centring means and its application method, makes
The sealing packing device of Pulp pump is quickly and expediently installed, and the installation precision of especially stuffing box is high, prevents the generation of eccentric wear, has
Effect extends the service life of the pump housing.
The technical solution adopted by the present invention is that:
A kind of pump L-type sealing centring means, the installation of the sealing packing device for Pulp pump, the airtight and watertight padding
Device includes packing sleeve matched with the pump shaft of Pulp pump, stuffing box and is set to filling out between packing sleeve and stuffing box
Material, it is critical that the centring means include the mating setting of outer wall of inner circle and packing sleeve, outer circle and stuffing box inner wall it is mating
The arc panel of setting and the ejecting unit being set on arc panel, the arc panel are in minor arc shape.
The protrusion of its axis is provided perpendicular in the outer circle of the arc panel, protrusion forms cross section with arc panel and is
The structure of L-type, the ejecting unit include one group be set in protrusion, liftout bolt matched with the side wall of stuffing box, institute
The installation threaded hole of liftout bolt is provided in the protrusion stated.
The protrusion is located at one end on arc panel far from stuffing box.
One group of gap, which is arranged at intervals with, along its circumferencial direction on the arc panel forms laciniation.
A kind of specific steps of the pump application method of L-type sealing centring means are as follows:
A, packing sleeve is installed on pump shaft, arc panel is set on the outer wall of packing sleeve；
B, stuffing box is set in the outer circle of arc panel；
C, fixed liner plate is installed on pump shaft, is provided with threaded hole on fixed liner plate, is provided on stuffing box and threaded hole
Matched installation via hole rotates stuffing box, corresponds to each other the installation via hole on stuffing box with the threaded hole on fixed liner plate, revolves
Turn the threaded hole that bolt enters bolt by the installation via hole on stuffing box on fixed liner plate, by stuffing box and fixed liner plate locking
It is fixed；
D, keep arc panel axially withdrawn to outside stuffing box along its by ejecting unit；
E, impeller, the pump housing, bushing, pump cover, preceding liner plate, suction cover are then successively installed on pump shaft；
F, filler is installed between stuffing box and packing sleeve, and is compressed filler using gland, the group of Pulp pump installs
At.
The beneficial effects of the present invention are: the arc panel of minor arc shape is easy to be sleeved on packing sleeve and convenient for removing, inner circle
With the mating setting of the outer wall of packing sleeve, the mating setting of inner wall of outer circle and stuffing box, as to stuffing box and packing sleeve it
Between distance restriction, that is, define the thickness of filler between stuffing box and packing sleeve, make filler in stuffing box and filler axis
The occurrence of thickness between set is uniform, consistent, effectively prevent eccentric wear, improves sealing effect；Arc panel is opposite to stuffing box
It is defined in the position of packing sleeve, stuffing box and fixed liner plate effectively can be subjected to installation fixation, it is difficult to reduce assembly
Degree improves installation precision and speed.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of centring means in the present invention.
Fig. 2 is the right view of Fig. 1.
Fig. 3 is the structural schematic diagram of Pulp pump.
Fig. 4 is the enlarged diagram of local Z.
Fig. 5 is the schematic diagram of part Z in step A.
Fig. 6 is the schematic diagram of part Z in step B.
Status diagram when Fig. 7 is L-type sealing centring means extraction stuffing box.
In attached drawing, 1, pump shaft, 2, packing sleeve, 3, stuffing box, 4, filler, 5, arc panel, 6, protrusion, 7, liftout bolt,
9, gap, 10, laciniation, 11, fixed liner plate.
Specific embodiment
The present invention relates to a kind of pump L-types to seal centring means, and the installation of the sealing packing device for Pulp pump is described
Sealing packing device include packing sleeve 2 matched with the pump shaft 1 of Pulp pump, stuffing box 3 and be set to packing sleeve 2 and fill out
Filler 4 between hopper 3, it is important to, which includes the mating setting of outer wall of inner circle and packing sleeve 2, outer circle and fills out
The arc panel 5 of the mating setting of the inner wall of hopper 3 and the ejecting unit being set on arc panel 5, the arc panel 5 are in minor arc
Shape.
With reference to the accompanying drawing and specific embodiment the invention will be further described.
Specific embodiment is provided perpendicular to the protrusion 6 of its axis, protrusion 6 as shown in figs. 1-7 in the outer circle of arc panel 5
With arc panel 5 formed cross section be L-type structure, the ejecting unit include one group be set to protrusion 6 on, with stuffing box 3
The matched liftout bolt 7 of side wall, the installation threaded hole of liftout bolt 7 is provided in the protrusion 6, protrusion 6 is located at arc
Far from the side of stuffing box 3 on plate 5, liftout bolt 7 is axially mounted in protrusion 6 along pump shaft 1, when installation stuffing box 3 is completed
Afterwards, liftout bolt 7 is rotated, the axial thrust along pump shaft 1 is generated between liftout bolt 7 and the side wall of stuffing box 3, arc can be made
Plate 5 is extracted out to the direction far from stuffing box 3.
One group of gap 9 is arranged at intervals with along its circumferencial direction on the arc panel 5 and forms laciniation 10, reduces arc
The outer wall of shape plate 5 and packing sleeve 2, stuffing box 3 inner wall between matching area, both can guarantee effective branch to stuffing box 3
Support positioning, and reduce difficulty of processing.Gap 9 at two is arranged in interval on arc panel 5 altogether in the present embodiment, makes arc panel 5
Effective cooperation is realized in outermost and middle position between stuffing box 3, and support effect is good at three.
The pump seals the specific steps of the application method of centring means with L-type are as follows:
A, Pulp pump is pre-installed, it is to be assembled to when needing to install stuffing box 3, packing sleeve 2 is installed on pump first
On axis 1, then arc panel 5 is set on the outer wall of packing sleeve 2, the inner wall of arc panel 5 and the outer wall of packing sleeve 2 paste
It closes；Arc panel 5 is minor arc shape, i.e. the corresponding central angle of arc panel 5 is readily placed on packing sleeve 2, and be easy to less than 180 °
It removes, it is convenient for disassembly and assembly；
B, stuffing box 3 is set in the outer circle of arc panel 5, stuffing box 3 is bonded with the outer circle of arc panel 5, i.e. arc panel 5
Thickness form the gap between stuffing box 3 and packing sleeve 2, so that stuffing box 3 and packing sleeve 2 is kept accurately concentric
Degree, and stuffing box 3 is defined relative to the position between packing sleeve 2, when preventing stuffing box 3 and fixed liner plate 11 from fixing
Deflection guarantees the depth of packing uniformity between stuffing box 3 and packing sleeve 2；
C, the right end of stuffing box 3 installs fixed liner plate 11 on pump shaft 1, and fixed liner plate 11 is positioned by joint plate,
It is provided with threaded hole on fixed liner plate 11, installation via hole matched with threaded hole is provided on stuffing box 3, the size of via hole is installed
Greater than the size of threaded hole, bolt can pass rapidly through installation via hole and threaded hole cooperates, but be easy to cause 3 deflection of stuffing box, and
It uses centring means in the application to be pre-positioned stuffing box 3, the position of stuffing box 3 is fixed and precision is high, and rotation is solid
Determine liner plate 11, correspond to each other installation via hole on stuffing box 3 with the threaded hole on fixed liner plate 11, rotate bolt make bolt by
Installation via hole on stuffing box 3 enters the threaded hole on fixed liner plate 11, stuffing box 3 and fixed liner plate 11 is locked, i.e.,
Fix stuffing box 3 relative to the position of packing sleeve 2；
D, by ejecting unit make arc panel 5 along its it is axially withdrawn be specifically described as to outside stuffing box 3, rotation ejection spiral shell
Bolt 7 generates the axial thrust along pump shaft 1 between liftout bolt 7 and the side wall of stuffing box 3, arc panel 5 can be made to far from filler
It extracts out in the direction of case 3；
E, impeller, the pump housing, bushing, pump cover, preceding liner plate, suction cover are then successively installed on pump shaft 1；
F, filler 4 is installed between stuffing box 3 and packing sleeve 2, and is compressed filler using gland, the assembling of Pulp pump
It completes.
Stuffing box 3 is set on arc panel 5, utilizes by the way that arc panel 5 is set in packing sleeve 2 in advance by the present invention
Easy-to-mount arc panel 5 is kept fixed distance between the two not to support is formed between packing sleeve 2, stuffing box 3
Become, that is, keep good concentricity, while improving the assembly precision between stuffing box 3 and fixed liner plate 11, reduces stuffing box 3
Relative to the allotment time of fixed liner plate 11, the Fast Installation of stuffing box 3 and fixed liner plate 11 is realized, and effectively prevent condiment box
3 glance off during the installation process；Stuffing box 3 and fixed liner plate 11 are subjected to installation fixation, i.e., by stuffing box 3 relative to filler
The position of axle sleeve 2 is fixed, so that the thickness uniformity of filler, effectively prevent the appearance of friction phenomenon, extends slag
The service life of stock pump.
Claims (5)
1. a kind of pump L-type seals centring means, the installation of the sealing packing device for Pulp pump, the airtight and watertight padding dress
Set including with Pulp pump the matched packing sleeve (2) of pump shaft (1), stuffing box (3) and be set to packing sleeve (2) and stuffing box
(3) filler (4) between, it is characterised in that: the centring means includes the mating setting of the outer wall of inner circle and packing sleeve (2), outer
The arc panel (5) of the round mating setting of inner wall with stuffing box (3) and the ejecting unit being set on arc panel (5), the arc
Shape plate (5) is in minor arc shape.
2. a kind of pump according to claim 1 seals centring means with L-type, it is characterised in that: the arc panel (5)
The protrusion (6) of its axis is provided perpendicular in outer circle, raised (6) and arc panel (5) form the structure that cross section is L-type, institute
The ejecting unit stated include one group be set on raised (6), liftout bolt (7) matched with the side wall of stuffing box (3), it is described
The installation threaded hole of liftout bolt (7) is provided on raised (6).
3. a kind of pump according to claim 2 seals centring means with L-type, it is characterised in that: the protrusion (6) is located at
Far from the one end of stuffing box (3) on arc panel (5).
4. a kind of pump according to claim 1 seals centring means with L-type, it is characterised in that: on the arc panel (5)
One group of gap (9), which is arranged at intervals with, along its circumferencial direction forms laciniation (10).
5. the application method that a kind of pump according to claim 1 seals centring means with L-type, which is characterized in that this method
Specific steps are as follows:
A, packing sleeve (2) is installed on pump shaft (1), arc panel (5) is set on the outer wall of packing sleeve (2)；
B, stuffing box (3) is set in the outer circle of arc panel (5)；
C, fixed liner plate (11) are installed on pump shaft (1), are provided with threaded hole on fixed liner plate (11), stuffing box is arranged on (3)
There is installation via hole matched with threaded hole, rotate stuffing box (3), make the installation via hole on stuffing box (3) and fixes liner plate (11)
On threaded hole correspond to each other, rotation bolt enter bolt on fixed liner plate (11) by the installation via hole on stuffing box (3)
Stuffing box (3) and fixed liner plate (11) are locked by threaded hole；
D, by ejecting unit make arc panel (5) along its it is axially withdrawn to stuffing box (3) outside；
E, impeller, the pump housing, bushing, pump cover, preceding liner plate, suction cover are then successively installed on pump shaft (1)；
F, filler (4) are installed between stuffing box (3) and packing sleeve (2), and are compressed filler (4) using gland, Pulp pump
Be completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910514247.8A CN110145498B (en) | 2019-06-14 | 2019-06-14 | L-shaped sealing centering device for pump and application method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910514247.8A CN110145498B (en) | 2019-06-14 | 2019-06-14 | L-shaped sealing centering device for pump and application method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110145498A true CN110145498A (en) | 2019-08-20 |
| CN110145498B CN110145498B (en) | 2024-07-30 |
Family
ID=67591243
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910514247.8A Active CN110145498B (en) | 2019-06-14 | 2019-06-14 | L-shaped sealing centering device for pump and application method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110145498B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113531121A (en) * | 2021-07-13 | 2021-10-22 | 包头钢铁（集团）有限责任公司 | Tool for extracting packing seal pump packing |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4210506A1 (en) * | 1992-03-31 | 1993-10-07 | Mitteldeutsche Feuerungs Und U | Stuffing box allowing angular spindle movement - has bush movable radially and self-aligning spindle bearing and is pressed against seal between it and centring ring |
| CN200971930Y (en) * | 2006-11-24 | 2007-11-07 | 李小春 | Expansion cover type coupling mechanism |
| CN201372956Y (en) * | 2009-01-05 | 2009-12-30 | 江苏双达工程技术研究中心有限公司 | Cartridge packing seal box for pump |
| KR20100001134U (en) * | 2008-07-24 | 2010-02-03 | 주식회사 한국가스기술공사 | Shaft centering apparatus of vaporization seawater pump |
| CN201836092U (en) * | 2010-10-29 | 2011-05-18 | 湖南湘电长沙水泵有限公司 | Vertical diagonal flow pump spindle center adjusting and centering wedge block |
| CN103470759A (en) * | 2013-09-07 | 2013-12-25 | 江苏贝德管道设备有限公司 | Double-seal high temperature and high pressure rotary compensator and manufacturing method thereof |
| US20150035232A1 (en) * | 2010-08-31 | 2015-02-05 | Linatex Limited,c/o Weir Minerals Europe | Adjustment mechanism for pump seal |
| JP2015132372A (en) * | 2014-01-15 | 2015-07-23 | 株式会社日立製作所 | Rotary shaft seal structure and rotary shaft seal method |
| CN105201914A (en) * | 2015-10-19 | 2015-12-30 | 肖琼 | Wear pump |
| CN207513849U (en) * | 2017-11-30 | 2018-06-19 | 河北技投机械设备有限公司 | Pulp pump |
| CN208437044U (en) * | 2018-05-10 | 2019-01-29 | 王兆群 | A kind of centring means |
| CN210152988U (en) * | 2019-06-14 | 2020-03-17 | 石家庄开发区石泵泵业有限公司 | L-shaped sealing and centering device for pump |
-
2019
- 2019-06-14 CN CN201910514247.8A patent/CN110145498B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4210506A1 (en) * | 1992-03-31 | 1993-10-07 | Mitteldeutsche Feuerungs Und U | Stuffing box allowing angular spindle movement - has bush movable radially and self-aligning spindle bearing and is pressed against seal between it and centring ring |
| CN200971930Y (en) * | 2006-11-24 | 2007-11-07 | 李小春 | Expansion cover type coupling mechanism |
| KR20100001134U (en) * | 2008-07-24 | 2010-02-03 | 주식회사 한국가스기술공사 | Shaft centering apparatus of vaporization seawater pump |
| CN201372956Y (en) * | 2009-01-05 | 2009-12-30 | 江苏双达工程技术研究中心有限公司 | Cartridge packing seal box for pump |
| US20150035232A1 (en) * | 2010-08-31 | 2015-02-05 | Linatex Limited,c/o Weir Minerals Europe | Adjustment mechanism for pump seal |
| CN201836092U (en) * | 2010-10-29 | 2011-05-18 | 湖南湘电长沙水泵有限公司 | Vertical diagonal flow pump spindle center adjusting and centering wedge block |
| CN103470759A (en) * | 2013-09-07 | 2013-12-25 | 江苏贝德管道设备有限公司 | Double-seal high temperature and high pressure rotary compensator and manufacturing method thereof |
| JP2015132372A (en) * | 2014-01-15 | 2015-07-23 | 株式会社日立製作所 | Rotary shaft seal structure and rotary shaft seal method |
| CN105201914A (en) * | 2015-10-19 | 2015-12-30 | 肖琼 | Wear pump |
| CN207513849U (en) * | 2017-11-30 | 2018-06-19 | 河北技投机械设备有限公司 | Pulp pump |
| CN208437044U (en) * | 2018-05-10 | 2019-01-29 | 王兆群 | A kind of centring means |
| CN210152988U (en) * | 2019-06-14 | 2020-03-17 | 石家庄开发区石泵泵业有限公司 | L-shaped sealing and centering device for pump |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113531121A (en) * | 2021-07-13 | 2021-10-22 | 包头钢铁（集团）有限责任公司 | Tool for extracting packing seal pump packing |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110145498B (en) | 2024-07-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4913619A (en) | Centrifugal pump having resistant components | |
| CA1235950A (en) | Slurry pump mechanical seal mounting assembly | |
| CN106322024B (en) | A kind of feeding sealing device of wet type ball mill, sealing system and its installation method | |
| CN105508602A (en) | Pressure vessel and locking ring applied to same | |
| CN110145498A (en) | A kind of pump L-type sealing centring means and its application method | |
| CN106762798B (en) | Mechanical seal special for oil-gas mixed transportation pump | |
| AU689714B2 (en) | Liquid sealing arrangement for liquid ring pumps | |
| CN205639051U (en) | Turn on pump in single -stage double suction with good sealing performance | |
| US2947260A (en) | Centrifugal pumps | |
| US3713749A (en) | Motor-driven pedestal-mounted pump assembly and method for manufacturing the same | |
| CN105864096A (en) | Singe-stage double-suction split case pump with good sealing performance | |
| CN210152988U (en) | L-shaped sealing and centering device for pump | |
| JP6768936B2 (en) | Uniaxial turbo compressor | |
| FI3741454T3 (en) | A rotary machine for acting on a process fluid | |
| US3090319A (en) | Pump liner | |
| CN104895830A (en) | External sealing structure of latent halogen pump motor and manufacturing method | |
| CN215908063U (en) | Single-stage double-suction horizontal slurry pump | |
| CN108533501A (en) | A kind of silicon carbide ceramics heavy type slurry pump | |
| CN109099004B (en) | Wear-resistant sealing mechanism for shaft seal of centrifugal pump and production method thereof | |
| CN206268444U (en) | For the stationary ring radial direction adjustment mechanism on mechanically-sealing apparatus | |
| CN218862876U (en) | Delivery pump structure for paint production | |
| CN220930196U (en) | Full-lining ceramic blanking valve | |
| CN216425778U (en) | Screw conveyer pivot connecting device | |
| CN218971484U (en) | Slurry pump sealing structure | |
| CN215673611U (en) | Shaft neck combined shaft seal structure for kneading machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |