CN220706405U - High-speed mechanical seal - Google Patents
High-speed mechanical seal Download PDFInfo
- Publication number
- CN220706405U CN220706405U CN202322391698.1U CN202322391698U CN220706405U CN 220706405 U CN220706405 U CN 220706405U CN 202322391698 U CN202322391698 U CN 202322391698U CN 220706405 U CN220706405 U CN 220706405U
- Authority
- CN
- China
- Prior art keywords
- speed
- ring
- low
- seat
- shaft sleeve
- 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.)
- Active
Links
- 210000004907 gland Anatomy 0.000 claims abstract description 28
- 230000009467 reduction Effects 0.000 claims description 25
- 239000003638 chemical reducing agent Substances 0.000 claims description 11
- 238000007789 sealing Methods 0.000 claims description 6
- 239000003921 oil Substances 0.000 claims description 5
- 239000010687 lubricating oil Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Landscapes
- Mechanical Sealing (AREA)
Abstract
The utility model discloses a high-speed mechanical seal, relates to the technical field of mechanical seals, and particularly relates to a high-speed mechanical seal structure for a pump body. The utility model comprises the following steps: the device comprises a shaft sleeve, an intermediate speed reducing device, a cavity, a gland, a high-speed seal and a low-speed seal; the shaft sleeve is sleeved on the shaft; the gland and the cavity are sleeved outside the shaft sleeve; the gland and the cavity are fixedly connected through bolts; the gland and the shaft sleeve are fixedly connected through bolts; the middle speed reducing device is arranged between the shaft sleeve, the gland and the cavity; the high-speed stage is hermetically arranged between the shaft sleeve and the middle speed reducing device; the low-speed stage is sealed and installed between the intermediate speed reducing device and the cavity. The technical scheme of the utility model solves the problems that the service life of the mechanical seal in the prior art is difficult to reach the expected service life at high linear speed, and a great amount of funds and time cost are lost due to frequent replacement of the mechanical seal.
Description
Technical Field
The utility model discloses a high-speed mechanical seal, relates to the technical field of mechanical seals, and particularly relates to a high-speed mechanical seal structure for a pump body.
Background
In petrochemical industry, the rotation speed of a process pump is generally below 3000r/min, but along with the continuous improvement of process parameters, the rotation speed of a pump shaft is often increased to 5000-10000 r/min or even higher under some high-lift and high-flow application working conditions. Due to the limitation of the friction limit PV value of the sealing ring material, the service life of the mechanical seal of the existing structure is difficult to reach the expected service life at high linear speed, and a great deal of capital and time cost is also lost due to frequent replacement of the mechanical seal.
In view of the above problems in the prior art, it is necessary to develop a novel high-speed mechanical seal to overcome the problems in the prior art.
Disclosure of Invention
The service life of the mechanical seal proposed according to the prior art is difficult to reach the expected service life at high linear speed, and a great deal of capital and time cost are lost due to frequent replacement of the mechanical seal, so that the high-speed mechanical seal is provided. The utility model mainly provides a high-speed mechanical seal, which reduces the upper line speed of the mechanical seal ring through an intermediate speed reducer so as to solve the problem that the mechanical seal is difficult to adapt to high rotation speed.
The utility model adopts the following technical means:
a high speed mechanical seal comprising: the device comprises a shaft sleeve, an intermediate speed reducing device, a cavity, a gland, a high-speed seal and a low-speed seal;
further, the shaft sleeve is sleeved on the shaft;
further, the gland and the cavity are sleeved outside the shaft sleeve; the gland and the cavity are fixedly connected through bolts; the gland and the shaft sleeve are fixedly connected through bolts;
further, the intermediate speed reducing device is arranged between the shaft sleeve, the gland and the cavity;
further, the high-speed stage seal is arranged between the shaft sleeve and the intermediate speed reducing device;
further, a low speed stage seal is mounted between the intermediate reduction gear and the cavity.
Further, the intermediate reduction gear includes: the device comprises a first middle speed reduction seat, a first bearing, a planetary gear shaft, a second bearing, a second middle speed reduction seat, a third bearing and a connecting screw;
further, the first intermediate speed reducing seat, the first bearing, the planetary gear shaft, the second bearing and the second intermediate speed reducing seat are sequentially connected and sleeved outside the shaft sleeve;
further, the first middle speed reducing seat is fixedly connected with the second middle speed reducing seat through a connecting screw;
further, a bearing III is arranged between the middle speed reducing seat II and the gland.
Further, the high-speed stage seal includes: the device comprises an O-ring I, a high-speed non-compensation ring, a high-speed push ring, a high-speed spring, a high-speed compensation ring seat and an O-ring III;
further, the high-speed non-compensation ring is sleeved on the shaft sleeve, and an O ring I is arranged between the high-speed non-compensation ring and the shaft sleeve;
further, the high-speed compensating ring, the high-speed push ring, the high-speed spring and the high-speed compensating ring seat are sequentially sleeved on the first intermediate speed reducing seat;
further, an O-ring III is arranged between the high-speed compensating ring seat and the first intermediate speed reducing seat;
further, the high-speed non-compensation ring is attached to the annular surface of the high-speed compensation ring.
Further, the low speed stage seal includes: the O ring IV, the low-speed non-compensation ring, the low-speed push ring, the low-speed spring, the low-speed compensation ring seat and the O ring VI;
further, the low-speed non-compensation ring is sleeved on the first intermediate speed reduction seat, and an O ring IV is arranged between the low-speed non-compensation ring and the first intermediate speed reduction seat;
further, the low-speed compensating ring, the low-speed push ring, the low-speed spring and the low-speed compensating ring seat are sleeved on the cavity in sequence;
further, an O ring IV is arranged between the low-speed compensating ring seat and the cavity;
further, the low-speed non-compensation ring is in annular fit with the low-speed compensation ring.
Further, an oil seal is arranged between the gland and the shaft sleeve and is used for sealing lubricating oil.
Further, the planetary gear shaft is meshed with the gear teeth on the shaft sleeve and the cavity respectively, so that the first intermediate speed reducing seat and the shaft sleeve are coaxial and rotate in the same direction, and the rotating speed is lower than that of the shaft sleeve.
Further, the third bearing is an angular contact ball bearing.
Further, an O-ring II and a high-speed support ring are arranged between the high-speed compensation ring and the high-speed compensation ring seat; the high-speed support ring is used for preventing the second O ring from being extruded.
Further, an O-ring five and a low-speed support ring are arranged between the low-speed compensation ring and the low-speed compensation ring seat; the low speed stage support ring is used to prevent the O-ring five from being squeezed out.
The application process of the utility model is as follows:
in the high-speed mechanical seal operation process, the external teeth arranged on the shaft sleeve, the internal teeth arranged on the cavity and the planetary gear shaft of the intermediate speed reducer form a planetary gear mechanism. The shaft sleeve rotates to drive the planetary gear shaft meshed with the shaft sleeve to rotate, and the planetary gear shaft drives the intermediate speed reducer to rotate along the axis. The rotation direction of the intermediate speed reducer is consistent with that of the shaft sleeve, and the rotation speed is lower than that of the shaft sleeve to form a differential speed. The high-speed-stage seal is arranged between the shaft sleeve and the intermediate speed reducer, the low-speed-stage seal is arranged between the intermediate speed reducer and the cavity, and the pumping medium is blocked between the outer diameter of the high-speed-stage seal and the inner diameter of the low-speed-stage seal. The linear speeds of the acting ring surfaces of the intermediate speed reducing device are relatively reduced, so that the sealing can be ensured to stably and reliably run.
Compared with the prior art, the utility model has the following advantages:
1. according to the high-speed mechanical seal provided by the utility model, the planetary gear mechanism of the intermediate speed reducing device is used for forming a high-speed mechanical seal and a low-speed mechanical seal, so that the linear speed of the single-stage mechanical seal is reduced, and the service life and the reliability of the seal are improved;
2. according to the high-speed mechanical seal, the oil seal arranged on the end cover can effectively prevent lubricating oil of the bearing and the gear from overflowing into the environment;
3. according to the high-speed mechanical seal, the angular contact ball bearing arranged between the intermediate speed reducer and the gland can effectively center the intermediate speed reducer and offset the axial counterforce formed by the seal spring.
In conclusion, the technical scheme of the utility model solves the problems of short service life, high operation and maintenance cost and the like of the traditional mechanical seal at high linear speed.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings may be obtained according to the drawings without inventive effort to a person skilled in the art.
FIG. 1 is a schematic diagram of the structure of the present utility model.
In the figure: 1. o-ring one 2, high-speed non-compensation ring 3, high-speed compensation ring 4, O-ring two 5, high-speed support ring 6, high-speed push ring 7, high-speed spring 8, high-speed compensation ring seat 9, O-ring three 10, bearing one 11, gear shaft 12, bearing two 13, bearing three 14, oil seal 15, shaft sleeve 16, gland 17, cavity 18, intermediate reduction seat two 19, connecting screw 20, intermediate reduction seat one 21, O-ring four 22, low-speed non-compensation ring 23, low-speed compensation ring 24, O-ring five 25, low-speed support ring 26, low-speed push ring 27, low-speed spring 28, low-speed compensation ring seat 29, and O-ring six.
Detailed Description
It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other. The utility model will be described in detail below with reference to the drawings in connection with embodiments.
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the utility model, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present utility model. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present utility model unless it is specifically stated otherwise. Meanwhile, it should be clear that the dimensions of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
In the description of the present utility model, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present utility model: the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present utility model.
As shown in fig. 1, the present utility model provides a high-speed mechanical seal comprising: the shaft sleeve 15, the intermediate speed reducer, the cavity 17, the gland 16, the high-speed level seal and the low-speed level seal; the shaft sleeve 15 is sleeved on the shaft; the gland 16 and the cavity 17 are sleeved outside the shaft sleeve 15; the gland 16 and the cavity 17 are fixedly connected through bolts; the gland 16 is fixedly connected with the shaft sleeve 15 through bolts; the intermediate speed reducing device is arranged among the shaft sleeve 15, the gland 16 and the cavity 17; the high-speed stage is hermetically arranged between the shaft sleeve 15 and the intermediate speed reducing device; the low speed stage seal is mounted between the intermediate reduction gear and the cavity 17.
The intermediate reduction gear includes: the first intermediate speed reduction seat 20, the first bearing 10, the planetary gear shaft 11, the second bearing 12, the second intermediate speed reduction seat 18, the third bearing 13 and the connecting screw 19; the first intermediate speed reducing seat 20, the first bearing 10, the planetary gear shaft 11, the second bearing 12 and the second intermediate speed reducing seat 18 are sequentially connected and sleeved outside the shaft sleeve 15; the first middle speed reducing seat 20 is fixedly connected with the second middle speed reducing seat 18 through a connecting screw 19; a bearing III 13 is arranged between the middle speed reduction seat II 18 and the gland 16, and the bearing III 13 is an angular contact ball bearing; the planetary gear shaft 11 is meshed with the gear teeth on the shaft sleeve 15 and the cavity 17 respectively, so that the first intermediate speed reduction seat 20 and the shaft sleeve 15 coaxially rotate in the same direction and have the rotating speed lower than that of the shaft sleeve 15; an oil seal 14 is arranged between the gland 16 and the shaft sleeve 15 for sealing lubricating oil.
The high speed stage seal includes: the device comprises an O-ring I1, a high-speed non-compensation ring 2, a high-speed compensation ring 3, a high-speed push ring 6, a high-speed spring 7, a high-speed compensation ring seat 8 and an O-ring III 9; the high-speed non-compensation ring 2 is sleeved on the shaft sleeve 15, and an O-ring I1 is arranged between the high-speed non-compensation ring 2 and the shaft sleeve 15; the high-speed compensating ring 3, the high-speed push ring 6, the high-speed spring 7 and the high-speed compensating ring seat 8 are sequentially sleeved on the first intermediate speed reducing seat 20; an O-ring III 9 is arranged between the high-speed compensating ring seat 8 and the first intermediate speed reducing seat 20; the high-speed non-compensation ring 2 is attached to the ring surface of the high-speed compensation ring 3. An O-ring II 4 and a high-speed support ring 5 are arranged between the high-speed compensation ring 3 and the high-speed compensation ring seat 8; the high-speed stage support ring 5 is used for preventing the second O-ring 4 from being extruded.
The low speed stage seal includes: the O-ring IV 21, the low-speed non-compensation ring 22, the low-speed compensation ring 23, the low-speed push ring 26, the low-speed spring 27, the low-speed compensation ring seat 28 and the O-ring IV 29; the low-speed non-compensation ring 22 is sleeved on the first intermediate speed reduction seat 20, and an O-ring IV 21 is arranged between the low-speed non-compensation ring 22 and the first intermediate speed reduction seat 20; the low-speed compensating ring 23, the low-speed push ring 26, the low-speed spring 27 and the low-speed compensating ring seat 28 are sleeved on the cavity 17 in sequence; an O-ring IV 29 is arranged between the low-speed compensating ring seat 28 and the cavity 17; the low-speed non-compensation ring 22 and the low-speed compensation ring 23 are in annular fit. An O-ring five 24 and a low-speed support ring 25 are arranged between the low-speed compensation ring 23 and the low-speed compensation ring seat 28; the low speed stage support ring 25 is used to prevent the O-ring five 24 from being squeezed out.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.
Claims (9)
1. A high-speed mechanical seal, characterized by:
the high-speed mechanical seal comprises: the device comprises a shaft sleeve (15), an intermediate speed reducer, a cavity (17), a gland (16), a high-speed seal and a low-speed seal;
the shaft sleeve (15) is sleeved on the shaft;
the gland (16) and the cavity (17) are sleeved outside the shaft sleeve (15); the gland (16) and the cavity (17) are fixedly connected through bolts; the gland (16) is fixedly connected with the shaft sleeve (15) through bolts;
the intermediate speed reducing device is arranged between the shaft sleeve (15), the gland (16) and the cavity (17);
the high-speed level seal is arranged between the shaft sleeve (15) and the middle speed reducing device;
the low-speed-level seal is arranged between the intermediate speed reducer and the cavity (17).
2. The high-speed mechanical seal of claim 1, wherein:
the intermediate speed reducing device comprises: the device comprises a first intermediate speed reduction seat (20), a first bearing (10), a planetary gear shaft (11), a second bearing (12), a second intermediate speed reduction seat (18), a third bearing (13) and a connecting screw (19);
the first intermediate speed reduction seat (20), the first bearing (10), the planetary gear shaft (11), the second bearing (12) and the second intermediate speed reduction seat (18) are sequentially connected and sleeved outside the shaft sleeve (15);
the first intermediate speed reducing seat (20) is fixedly connected with the second intermediate speed reducing seat (18) through a connecting screw (19);
and a bearing III (13) is arranged between the intermediate speed reduction seat II (18) and the gland (16).
3. The high-speed mechanical seal of claim 1, wherein:
the high-speed sealing comprises: the device comprises an O-ring I (1), a high-speed non-compensation ring (2), a high-speed compensation ring (3), a high-speed push ring (6), a high-speed spring (7), a high-speed compensation ring seat (8) and an O-ring III (9);
the high-speed non-compensation ring (2) is sleeved on the shaft sleeve (15), and an O-ring I (1) is arranged between the high-speed non-compensation ring (2) and the shaft sleeve (15);
the high-speed compensating ring (3), the high-speed push ring (6), the high-speed spring (7) and the high-speed compensating ring seat (8) are sequentially sleeved on the first middle speed reduction seat (20);
an O-ring III (9) is arranged between the high-speed compensating ring seat (8) and the intermediate speed reducing seat I (20);
the high-speed non-compensation ring (2) is attached to the annular surface of the high-speed compensation ring (3).
4. The high-speed mechanical seal of claim 1, wherein:
the low-speed stage seal comprises: the device comprises an O-ring IV (21), a low-speed non-compensation ring (22), a low-speed compensation ring (23), a low-speed push ring (26), a low-speed spring (27), a low-speed compensation ring seat (28) and an O-ring IV (29);
the low-speed non-compensation ring (22) is sleeved on the first intermediate speed reduction seat (20), and an O-ring IV (21) is arranged between the low-speed non-compensation ring (22) and the first intermediate speed reduction seat (20);
the low-speed compensating ring (23), the low-speed push ring (26), the low-speed spring (27) and the low-speed compensating ring seat (28) are sleeved on the cavity (17) in sequence;
an O-ring six (29) is arranged between the low-speed compensating ring seat (28) and the cavity (17);
the low-speed non-compensation ring (22) is attached to the ring surface of the low-speed compensation ring (23).
5. The high-speed mechanical seal of claim 1, wherein:
an oil seal (14) is arranged between the gland (16) and the shaft sleeve (15) and is used for sealing lubricating oil.
6. The high-speed mechanical seal of claim 2, wherein:
the planetary gear shaft (11) is meshed with the shaft sleeve (15) and the gear teeth on the cavity (17) respectively, so that the intermediate speed reduction seat I (20) and the shaft sleeve (15) coaxially rotate in the same direction, and the rotating speed is lower than that of the shaft sleeve (15).
7. The high-speed mechanical seal of claim 2, wherein:
and the bearing III (13) is an angular contact ball bearing.
8. A high speed mechanical seal according to claim 3, wherein:
an O-ring II (4) and a high-speed support ring (5) are arranged between the high-speed compensation ring (3) and the high-speed compensation ring seat (8); the high-speed support ring (5) is used for preventing the O-ring II (4) from being extruded.
9. The high-speed mechanical seal of claim 4, wherein:
an O-ring five (24) and a low-speed support ring (25) are arranged between the low-speed compensation ring (23) and the low-speed compensation ring seat (28); the low-speed stage support ring (25) is used for preventing the O-ring five (24) from being extruded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322391698.1U CN220706405U (en) | 2023-09-04 | 2023-09-04 | High-speed mechanical seal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322391698.1U CN220706405U (en) | 2023-09-04 | 2023-09-04 | High-speed mechanical seal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220706405U true CN220706405U (en) | 2024-04-02 |
Family
ID=90450473
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322391698.1U Active CN220706405U (en) | 2023-09-04 | 2023-09-04 | High-speed mechanical seal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220706405U (en) |
-
2023
- 2023-09-04 CN CN202322391698.1U patent/CN220706405U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103542040B (en) | A kind of rectangular axis planetary reducer | |
| CN220706405U (en) | High-speed mechanical seal | |
| CN106051121A (en) | Duplex gear speed reducing device | |
| CN210799937U (en) | Intermittent worm and gear transmission mechanism | |
| CN207985956U (en) | A kind of revolving platform | |
| CN102748431A (en) | Speed reducer and heading machine with speed reducer | |
| CN104696637B (en) | A kind of controllable type oil filling riser steering knuckle | |
| CN103115113A (en) | Stirring reduction box | |
| CN215558834U (en) | Novel spiral elevator | |
| CN103115112B (en) | Inner and outer tooth form meshing gear reducer | |
| CN205841693U (en) | A kind of duplicate gear deceleration device | |
| CN112428299A (en) | Four-axis pile up neatly machine people | |
| CN110242764B (en) | Ball valve convenient to disassemble and assemble | |
| CN209576563U (en) | A kind of drive mechanism of vertical stirring device | |
| CN209622179U (en) | A kind of valve worm gear case without adjusting jackscrew | |
| CN221003246U (en) | Mechanical seal for hydrogenation feed pump | |
| CN213575360U (en) | Worm gear speed reducer with hollow structure | |
| CN214092489U (en) | Aluminium system hydraulic tank with quick detach formula oil-out structure | |
| CN220016075U (en) | Rotary and stationary changeable mechanical seal | |
| CN221257656U (en) | Magnetic oil seal suitable for forced lubrication | |
| CN214888741U (en) | Floating oil seal's switching structure and speed reducer for speed reducer | |
| CN212899635U (en) | Sea wave tooth type speed reducer with input shaft improved fixing structure | |
| CN215980683U (en) | Compact electric push rod | |
| CN211009736U (en) | High-sealing-performance coaxial dual-output planetary gear reducer | |
| CN213829033U (en) | Four-axis pile up neatly machine people |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |