CN112796310A - Stirring structure - Google Patents
Stirring structure Download PDFInfo
- Publication number
- CN112796310A CN112796310A CN201911110261.8A CN201911110261A CN112796310A CN 112796310 A CN112796310 A CN 112796310A CN 201911110261 A CN201911110261 A CN 201911110261A CN 112796310 A CN112796310 A CN 112796310A
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- Prior art keywords
- bevel gear
- stirring
- longitudinal
- gear
- transverse
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/46—Concrete or concrete-like piles cast in position ; Apparatus for making same making in situ by forcing bonding agents into gravel fillings or the soil
Abstract
The invention discloses a stirring structure, which comprises: the tail end of the longitudinal stirring rod is provided with a blade; the transverse rotating shaft is in transmission connection with the longitudinal stirring rod through a bevel gear mechanism; the first transverse stirring blade is in transmission connection with the longitudinal stirring rod through a planetary mechanism; the protecting sleeve is sleeved outside the longitudinal stirring rod and hermetically covers the planetary mechanism and the bevel gear mechanism; the planet carrier of the planetary mechanism is axially sleeved on the longitudinal stirring rod and driven to rotate by the bevel gear mechanism, and the transverse rotating shaft is provided with a longitudinal stirring body outside the extending-out protective sleeve. The stirring structure solves the problem that the stirring structure for the construction of the existing cement-soil stirring pile can not mix and stir the stirred substances at different height positions.
Description
Technical Field
The invention belongs to the technical field of pile machine equipment, and particularly relates to a stirring structure.
Background
The invention patent with the application number of 2016109686877 discloses an energy-saving strong self-reaction multidirectional cement soil mixing pile drilling tool, which comprises a drilling rod, a gear shaft, a planetary gear, a gear sleeve and a planetary gear base, wherein the drilling rod is fixedly connected with the gear shaft, the gear shaft and the planetary gear are positioned in a gear ring sleeve, the gear shaft is meshed with the planetary gear, the planetary gear is arranged on the planetary gear base through a rotating shaft, the planetary gear is also meshed with inner teeth of the gear ring sleeve, and a reverse blade is arranged on the outer side of the gear ring sleeve. The gear shaft rotates forward to drive the planetary gear to rotate reversely around the axis of the gear shaft, and the acting force of the reverse rotation of the planetary gear drives the gear ring sleeve to rotate reversely so as to realize that the gear ring sleeve drives the reverse blades to stir reversely.
According to the above description, it can be seen that the conventional drilling tool can forward stir the stirred material (such as a mixture of cement, sand, stone, slurry, etc.) and backward stir the stirred material at the same time, however, since the tangential blade and the counter-rotating blade are both stirring blades extending along the radial direction of the drill rod, the forward stirring and the backward stirring of the drilling tool can be respectively performed only at different height positions of the drilled hole, which means that the drilling tool can only uniformly stir the stirred material at the same height position of the drilled hole, but cannot mix and stir concrete at different height positions of the drilled hole, and thus has no three-dimensional stirring effect.
Disclosure of Invention
In view of the above, an object of the present invention is to provide a mixing structure, which solves the problem that the mixing structure for the construction of the existing cement mixing pile cannot mix and stir the materials to be mixed at different heights.
In order to solve the above technical problems, the present invention provides a stirring structure comprising:
the tail end of the longitudinal stirring rod is provided with a blade;
the transverse rotating shaft is in transmission connection with the longitudinal stirring rod through a bevel gear mechanism;
the first transverse stirring blade is in transmission connection with the longitudinal stirring rod through a planetary mechanism;
the protecting sleeve is sleeved outside the longitudinal stirring rod and hermetically covers the planetary mechanism and the bevel gear mechanism;
the planet carrier of the planetary mechanism is axially sleeved on the longitudinal stirring rod and driven to rotate by the bevel gear mechanism, and the transverse rotating shaft is provided with a longitudinal stirring body outside the extending-out protective sleeve.
Preferably, the planetary mechanism further comprises a sun gear, a planetary gear and an outer gear ring, the sun gear is fixedly sleeved on the longitudinal stirring rod, the outer gear ring and the planet carrier are respectively and movably sleeved on the longitudinal stirring rod in the circumferential direction, the sun gear and the outer gear ring are in meshing transmission through the planetary gear, the planetary gear is arranged on the planet carrier, and a matching bevel gear is arranged on the planet carrier.
Preferably, the bevel gear mechanism comprises a driving bevel gear and a driven bevel gear, the driving bevel gear is fixedly sleeved on the longitudinal stirring rod, and the driving bevel gear and the matching bevel gear are in meshing transmission through the driven bevel gear;
the longitudinal stirring body comprises a connecting plate which synchronously rotates along with the transverse rotating shaft, and more than two shoveling plates are arranged at intervals along the length direction of the connecting plate.
Preferably, a first annular channel is formed in the protective sleeve, the outer gear ring is inserted into the first annular channel, and the first transverse stirring blade is located outside the protective sleeve.
Preferably, the stirring structure further comprises a turntable, the turntable is movably sleeved on the longitudinal stirring rod and/or the protective sleeve, and a second transverse stirring blade is arranged on the outer wall of the turntable.
Preferably, the rotating disc is provided with a gap, and at least part of the first transverse stirring blades penetrate through the corresponding gap and extend out in the radial direction.
Preferably, the axis of the drive bevel gear and the axis of the driven bevel gear are perpendicular to each other.
Preferably, the stirring structure further comprises an annular baffle, a second annular channel is formed in the protective sleeve, the annular baffle is movably sleeved outside the protective sleeve and shields the second annular channel, and the transverse rotating shaft penetrates through the annular baffle and then is coaxially arranged with the driven bevel gear.
Preferably, the longitudinal stirring rod is provided with an installation platform, the side wall of the installation platform is provided with an installation hole, and the tail end of the transverse rotating shaft is inserted into the installation hole.
Preferably, a material pipeline is arranged on the longitudinal stirring rod.
The stirring structure comprises a longitudinal stirring rod, a planetary mechanism and a first transverse stirring blade, wherein the tail end of the longitudinal stirring rod is provided with the blade, and the forward rotation of the blade is used for stirring concrete in the forward direction in the forward rotation process of the longitudinal stirring rod; planetary mechanism includes sun gear, planetary gear, outer ring gear and planet carrier, sun gear cup joints in vertical puddler fixedly, vertical puddler is at the rotatory in-process of forward, vertical puddler drives the sun gear forward rotation, sun gear passes through planetary gear and drives outer ring gear reverse rotation, because outer ring gear is located to first horizontal stirring vane, consequently, outer ring gear drives first horizontal stirring vane reverse rotation, the reverse rotation that is used for reverse stirring concrete in order to realize first horizontal stirring vane.
The stirring structure also comprises a longitudinal stirring body and a bevel gear mechanism, wherein a transverse rotating shaft is arranged on the longitudinal stirring body, the transverse rotating shaft and a driven bevel gear are coaxially arranged, the bevel gear mechanism comprises a driving bevel gear and a driven bevel gear, the driving bevel gear is fixedly sleeved on the longitudinal stirring rod, the longitudinal stirring rod drives the driving bevel gear to rotate in the forward direction in the forward rotation process of the longitudinal stirring rod, the driving bevel gear drives the driven bevel gear to rotate around the axial direction of the driving bevel gear, the driven bevel gear drives the longitudinal stirring body to rotate around the axial direction of the driven bevel gear through the transverse rotating shaft, and the driving bevel gear is not parallel to the driven bevel gear, so that when the longitudinal stirring body rotates around the axial direction of the driven bevel gear, the longitudinal stirring body mixes and. By the design, the concrete at different height positions is stirred, so that the component ratios of the concrete at different height positions tend to be consistent.
According to the invention, the planet gear is arranged on the planet carrier, the planet carrier is provided with a matching bevel gear, the matching bevel gear is in meshing transmission with the driven bevel gear, when the longitudinal stirring rod rotates in the forward direction, the longitudinal stirring rod drives the driving bevel gear to rotate in the forward direction, and the driving bevel gear provides a reverse rotation acting force for the matching bevel gear through the driven bevel gear; meanwhile, the longitudinal stirring rod drives the sun gear to rotate positively, and the sun gear provides acting force for the planet carrier to rotate positively through the planet gear. When the reverse rotation acting force received by the matching bevel gear is equal to the forward rotation acting force received by the planet carrier, the planet carrier is static, and the sun gear drives the outer gear ring to rotate reversely through the planet gear.
Drawings
FIG. 1 is a perspective view of a stirring structure of the present invention;
FIG. 2 is a top view of the stirring structure of the present invention;
FIG. 3 is a cross-sectional view taken at A-A of FIG. 2;
FIG. 4 is a perspective view of a blade and rotating blade of the present invention;
FIG. 5 is a bottom view of the blade of the present invention;
fig. 6 is a perspective view of the sleeve of the present invention.
Detailed Description
In order to facilitate understanding of the technical solutions of the present invention, the following detailed description is made with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1, 2 and 3, the agitating structure includes:
a longitudinal agitating bar 1 having a blade 12 at a distal end (i.e., a lower end as shown in fig. 1);
the transverse rotating shaft 31 is in transmission connection with the longitudinal stirring rod 1 through a bevel gear mechanism 5;
the first transverse stirring blade 4 is in transmission connection with the longitudinal stirring rod 1 through a planetary mechanism 6;
the protecting sleeve 2 is sleeved outside the longitudinal stirring rod 1 and hermetically covers the planetary mechanism 6 and the bevel gear mechanism 5;
the planet carrier 64 of the planetary mechanism 6 is axially sleeved on the longitudinal stirring rod 1 and driven to rotate by the bevel gear mechanism 5, and the transverse rotating shaft 31 is provided with the longitudinal stirring body 3 outside the extending protection sleeve 2.
Referring to fig. 3 and 5, the planetary mechanism 6 of the present embodiment further includes a sun gear 61, a planetary gear 62 and an outer ring gear 63, the sun gear 61 is fixedly sleeved on the longitudinal stirring rod 1, the outer ring gear 63 and a planet carrier 64 are respectively sleeved on the longitudinal stirring rod 1 in a movable manner in the circumferential direction, the sun gear 61 and the outer ring gear 63 are in meshing transmission through the planetary gear 62, the planetary gear 62 is disposed on the planet carrier 64, the planetary gear 62 can freely rotate relative to the planet carrier 64, the planet carrier 64 is provided with a mating bevel gear 53, and the mating bevel gear 53 can be movably sleeved on the longitudinal stirring rod 1 preferably by using a bearing or a sliding sleeve.
Referring to fig. 3 and 4, the bevel gear mechanism 5 of the present embodiment includes a drive bevel gear 51 and a driven bevel gear 52, the drive bevel gear 51 is fixedly sleeved on the longitudinal stirring rod 1, and the drive bevel gear 51 and the mating bevel gear 53 are in mesh transmission through the driven bevel gear 52.
Referring to fig. 3 and 6, the planetary mechanism 6 and the bevel gear mechanism 5 of the present embodiment are provided to the shield case 2, wherein the sun gear 61, the planet gear 62, the driving bevel gear 51, the driven bevel gear 52 and the matching bevel gear 53 are positioned in the protective sleeve 2, a sealing structure is arranged between one axial end (the upper end in figure 3) of the protective sleeve 2 and the longitudinal stirring rod 1, thereby avoiding the stirred object from entering the protective sleeve through the installation positions of the longitudinal stirring rod and the protective sleeve 2 to influence the gear transmission, and on the basis of the same purpose, the protective sleeve 2 is radially provided with a through hole for the transverse rotating shaft 31 to penetrate through, and a sealing structure which does not affect the rotational freedom degree of the rotating blades 3 is arranged between the through hole and the transverse rotating shaft 31, a first annular channel 22 for the outer gear ring 63 to penetrate is radially arranged on the protective sleeve 2, and a sealing structure which does not influence the rotation freedom degree of the longitudinal stirring body 3 is arranged between the first annular channel 22 and the outer gear ring 63.
Referring to fig. 1 and 3, the first transverse stirring vane 4 of the present embodiment is provided on the outer wall of the outer ring gear 63; for the reinforcing is stirred the mobility of object, in this embodiment, avoid stirring structure during operation axial extrusion by stirring object, the stirring effect of first horizontal stirring vane 4 personally submits T shape or Y shape or X shape etc. and the stirring effect face of first horizontal stirring vane 4 forms non-90 contained angles with the axis of vertical puddler 1, and under the condition that has a plurality of first horizontal stirring vane 4, the stirring effect face incline direction of each first horizontal stirring vane 4 is unanimous.
Referring to fig. 1 and 3, the longitudinal stirring body 3 of the present embodiment is a rotating blade, the rotating blade includes a connecting plate rotating synchronously along with the transverse rotating shaft 31, and the connecting plate is provided with more than two shoveling plates at intervals along the length direction, and the transverse rotating shaft 31 is disposed coaxially with the driven bevel gear 52 after penetrating through the protecting sleeve 2.
In the invention, the working principle of the stirring structure is as follows: the longitudinal stirring rod 1 rotates forward under the driving of an external power source (the rotating direction of the longitudinal stirring rod 1 is defined as the forward rotating direction, and the direction of the reverse rotation of the longitudinal stirring rod 1 is defined as the reverse rotating direction), the rotating speed of the longitudinal stirring rod 1 can be selectively adjusted between 1 revolution per minute and 100 revolutions per minute, in the forward rotating process of the longitudinal stirring rod 1, the longitudinal stirring rod 1 drives the driving bevel gear 51 and the sun gear 61 to rotate forward, wherein when the longitudinal stirring rod 1 drives the driving bevel gear 51 to rotate forward, the driving bevel gear 51 drives the driven bevel gear 52 to rotate around the self axial direction, and the driven bevel gear 52 drives the longitudinal stirring body 3 to rotate around the driven bevel gear 52 axially through the transverse rotating shaft 32; when the longitudinal stirring rod 1 drives the sun gear 61 to rotate forward, the sun gear 61 drives the outer gear ring 63 to rotate reversely through the planet gear 62, so that the outer gear ring 63 drives the first transverse stirring blade 4 to rotate reversely.
Because the planetary gear 62 is arranged on the planet carrier 64 and the mating bevel gear 53 is arranged on the planet carrier 64, when the longitudinal stirring rod 1 rotates in the forward direction, the longitudinal stirring rod 1 drives the driving bevel gear 51 to rotate in the forward direction, and the driving bevel gear 51 provides acting force for the mating bevel gear 53 to rotate in the reverse direction through the driven bevel gear 52; at the same time, the longitudinal stirring rod 1 also drives the sun gear 61 to rotate positively, and the sun gear 61 provides a positive rotating force for the planet carrier 64 through the planet gears 62. When the reverse rotational force applied to the mating bevel gear 53 is equal to the forward rotational force applied to the carrier 64, the carrier 64 is stationary, and the sun gear 61 rotates the outer ring gear 63 in the reverse direction through the pinion gears 62.
Referring to fig. 3 and 6, the protective sleeve 2 is provided with a first annular passage 22, the outer gear ring 63 is inserted into the first annular passage 22, and the first transverse stirring blade 4 is located outside the protective sleeve 2.
The stirring structure further comprises a turntable 7, the turntable 7 is movably sleeved on the longitudinal stirring rod 1 and/or the protective sleeve 2, and a second transverse stirring blade 71 is arranged on the outer wall of the turntable 7. As can be seen from fig. 1, the turntable 7 of the present embodiment is movably sleeved on the longitudinal stirring rod 1 and the shielding sheath 2, in the present embodiment, the rotary table 7 comprises a base body and a sleeve positioned at the lower end of the base body, in order to avoid the stirring structure from being damaged in the drilling construction process, the mounting seat 72 axially extrudes the stirred object positioned below, the lower end of the seat body and the top of the sleeve form a conical transition part, and/or the length direction of the second transverse stirring blade 71 is perpendicular to the central axis of the longitudinal stirring rod 1, and the stirring action surface of the second transverse stirring blade 71 and the central axis of the longitudinal stirring rod 1 form an included angle of not 90 degrees, in the case of having a plurality of second transverse agitating blades 71, a second transverse agitating blade group axially surrounding the longitudinal agitating shaft 1 may be constituted by every 2 to 5 second transverse agitating blades 71, and has at least two second transverse stirring blade groups arranged at intervals in the axial direction of the rotary disk 7. Of course, the plurality of second transverse stirring blades 71 may also be arranged at intervals in a spiral manner along the length direction of the rotary disk 7.
The third transverse stirring blade 9 is disposed below the turntable 7 or above the protective sleeve 2 of the longitudinal stirring rod 1, the structure and arrangement of the third transverse stirring blade 9 can refer to the design of the second transverse stirring blade 71, and details are not repeated herein, however, it is further described that the blade 12 is a helical blade, when the maximum rotation radius of the helical blade is smaller than the rotation radius of the third transverse stirring blade 9, the third transverse stirring blade 9 is provided with a cutting portion in the length direction, and the cutting portion of the third transverse stirring blade 9 can refer to the cutting portion of the helical blade. The stirring radius of the third stirring vane 9 is preferably equal to or larger than the stirring radius of the second stirring vane 71. The stirring radius of the third transverse stirring blade 9 is equal to or larger than the stirring radius of the first transverse stirring blade 4 and the stirring radius of the first transverse stirring blade 3.
In addition, in order to avoid the influence of the breakage of a part of the number of the third transverse stirring blades 9 and/or the second transverse stirring blades 71 on the improvement of the overall service life of the stirring structure, detachable assembling structures are preferably adopted between the third transverse stirring blades 9 and the longitudinal stirring rod 1 and between the second transverse stirring blades 71 and the rotating disk 7.
Referring to fig. 1 and 6, the stirring structure further includes an annular baffle 8, a second annular channel 21 is provided on the protective sleeve 2, the annular baffle 8 is movably sleeved on the protective sleeve 2 and shields the second annular channel 21, and the transverse rotating shaft 31 is coaxially disposed with the driven bevel gear 52 after penetrating through the annular baffle 8. In this embodiment, the axis of the drive bevel gear 51 is perpendicular to the axis of the driven bevel gear 52, and when the transverse rotating shaft 31 is coaxially disposed with the driven bevel gear 52, the axis of the transverse rotating shaft 31 is perpendicular to the axis of the drive bevel gear 51, and when the transverse rotating shaft 31 is driven by the driven bevel gear 52 to rotate, the longitudinal stirring body 3 rotates around the central axis of the drive bevel gear 51.
Preferably, the longitudinal stirring rod 1 is provided with a mounting platform 13, the side wall of the mounting platform 13 is provided with a mounting hole, the mounting hole and a through hole for the longitudinal stirring rod 1 to penetrate through are combined into a cross hole group, and the tail end of the transverse rotating shaft 31 is inserted into the mounting hole.
Referring to fig. 1, the turntable 7 is provided with a notch 72, at least a part of the first transverse stirring blade 4 penetrates through the corresponding notch 72 and extends out radially, and when the outer gear ring 63 drives the first transverse stirring blade 4 to rotate reversely, the first transverse stirring blade drives the turntable 7 to rotate reversely through the notch 72, so that the turntable 7 drives the second transverse stirring blade 71 to rotate reversely.
In the present embodiment, since the planetary mechanism 6 is located below the bevel gear mechanism 5, in order to avoid the second transverse stirring blade 71 from interfering with the first transverse stirring blade 3, the second transverse stirring blade 71 is located below the first transverse stirring blade 4.
Referring to fig. 3, a material pipeline 11 is arranged on the longitudinal stirring rod 1, the material pipeline 11 is used for conveying various flowing media, the materials include but are not limited to cement, gravel, concrete and high-pressure gas, the materials can enter a construction position through the material pipeline 11 and can be mixed with broken objects in a construction area to form stirred objects, and therefore the material is used for constructing and operating high-quality concrete mixing piles or composite piles.
The above is only a preferred embodiment of the present invention, and the scope of the present invention is defined by the appended claims, and several modifications and amendments made by those skilled in the art without departing from the spirit and scope of the present invention should be construed as the scope of the present invention.
Claims (10)
1. Stirring structure, its characterized in that includes:
the tail end of the longitudinal stirring rod is provided with a blade;
the transverse rotating shaft is in transmission connection with the longitudinal stirring rod through a bevel gear mechanism;
the first transverse stirring blade is in transmission connection with the longitudinal stirring rod through a planetary mechanism;
the protecting sleeve is sleeved outside the longitudinal stirring rod and hermetically covers the planetary mechanism and the bevel gear mechanism;
the planet carrier of the planetary mechanism is axially sleeved on the longitudinal stirring rod and driven to rotate by the bevel gear mechanism, and the transverse rotating shaft is provided with a longitudinal stirring body outside the extending-out protective sleeve.
2. The mixing structure of claim 1, wherein the planetary mechanism further comprises a sun gear, a planetary gear and an outer ring gear, the sun gear is fixedly sleeved on the longitudinal mixing rod, the outer ring gear and the planet carrier are respectively sleeved on the longitudinal mixing rod in a circumferentially movable manner, the sun gear and the outer ring gear are in meshing transmission through the planetary gear, the planetary gear is arranged on the planet carrier, and the planet carrier is provided with a matching bevel gear.
3. The stirring structure of claim 2, wherein the bevel gear mechanism comprises a driving bevel gear and a driven bevel gear, the driving bevel gear is fixedly sleeved on the longitudinal stirring rod, and the driving bevel gear and the matching bevel gear are in mesh transmission through the driven bevel gear;
the longitudinal stirring body comprises a connecting plate which synchronously rotates along with the transverse rotating shaft, and more than two shoveling plates are arranged at intervals along the length direction of the connecting plate.
4. The mixing structure of claim 1, wherein said shroud defines a first annular channel therein, said outer ring gear is received in said first annular channel, and said first transverse mixing blade is disposed outside said shroud.
5. The stirring structure of claim 4, further comprising a rotating disc movably sleeved on the longitudinal stirring rod and/or the protective sleeve, wherein the outer wall of the rotating disc is provided with a second transverse stirring blade.
6. The mixing structure according to claim 5, wherein the rotating disc is provided with a gap, and at least a portion of the first transverse mixing blade extends radially through the corresponding gap.
7. The stirring structure of claim 1, wherein the axis of the drive bevel gear and the axis of the driven bevel gear are perpendicular to each other.
8. The stirring structure of claim 7, further comprising an annular baffle, wherein a second annular channel is formed in the protective sleeve, the annular baffle is movably sleeved outside the protective sleeve and shields the second annular channel, and the transverse rotating shaft penetrates through the annular baffle and then is coaxially arranged with the driven bevel gear.
9. The stirring structure of claim 8, wherein the longitudinal stirring rod is provided with a mounting platform, the side wall of the mounting platform is provided with a mounting hole, and the tail end of the transverse rotating shaft is inserted into the mounting hole.
10. The stirring structure of claim 1, wherein the longitudinal stirring rod is provided with a material pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911110261.8A CN112796310A (en) | 2019-11-14 | 2019-11-14 | Stirring structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911110261.8A CN112796310A (en) | 2019-11-14 | 2019-11-14 | Stirring structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112796310A true CN112796310A (en) | 2021-05-14 |
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ID=75803547
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911110261.8A Pending CN112796310A (en) | 2019-11-14 | 2019-11-14 | Stirring structure |
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| Country | Link |
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| CN (1) | CN112796310A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114734057A (en) * | 2022-04-24 | 2022-07-12 | 重庆理工大学 | Laser melting 3d printing method based on metal powder |
| CN116514257A (en) * | 2023-07-03 | 2023-08-01 | 东营市清云石油技术有限责任公司 | Chemical wastewater treatment equipment |
-
2019
- 2019-11-14 CN CN201911110261.8A patent/CN112796310A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114734057A (en) * | 2022-04-24 | 2022-07-12 | 重庆理工大学 | Laser melting 3d printing method based on metal powder |
| CN116514257A (en) * | 2023-07-03 | 2023-08-01 | 东营市清云石油技术有限责任公司 | Chemical wastewater treatment equipment |
| CN116514257B (en) * | 2023-07-03 | 2023-08-25 | 东营市清云石油技术有限责任公司 | Chemical wastewater treatment equipment |
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