CN111220366A - Quality detection device of windmill main shaft in wind power generation - Google Patents

Quality detection device of windmill main shaft in wind power generation Download PDF

Info

Publication number
CN111220366A
CN111220366A CN201911179899.7A CN201911179899A CN111220366A CN 111220366 A CN111220366 A CN 111220366A CN 201911179899 A CN201911179899 A CN 201911179899A CN 111220366 A CN111220366 A CN 111220366A
Authority
CN
China
Prior art keywords
groove
sliding
power generation
wind power
rod
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.)
Pending
Application number
CN201911179899.7A
Other languages
Chinese (zh)
Inventor
王犇
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Xuzhou Hongji Ring Forging Technology Co Ltd
Original Assignee
Xuzhou Hongji Ring Forging Technology Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Xuzhou Hongji Ring Forging Technology Co Ltd filed Critical Xuzhou Hongji Ring Forging Technology Co Ltd
Priority to CN201911179899.7A priority Critical patent/CN111220366A/en
Publication of CN111220366A publication Critical patent/CN111220366A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M13/00Testing of machine parts
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25BTOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B11/00Work holders not covered by any preceding group in the subclass, e.g. magnetic work holders, vacuum work holders

Abstract

The invention relates to the technical field of detection devices, and discloses a quality detection device for a windmill spindle in wind power generation, which comprises a detection table, wherein the top of the detection table is provided with a first sliding chute, a containing groove is formed in the groove wall of one side of the detection table positioned under the first sliding chute, the groove bottom of the first sliding chute is rotatably connected with a transit rod through a first bearing, the first bearing is fixedly arranged on the groove bottom of the first sliding chute, two fixed plates are symmetrically connected in the first sliding chute through a transit mechanism, a rotating mechanism is arranged on each fixed plate, and an operating mechanism is arranged in each containing groove; the transfer mechanism comprises two first sliding blocks, a threaded rod, a first bevel gear and a second bevel gear, the two first sliding blocks are symmetrically connected in a first sliding groove in a sliding mode, and a threaded hole is formed in the first sliding block located in the first sliding groove. Compared with the prior art, the quality detection device of the windmill main shaft in wind power generation is convenient for fixing the main shaft on the windmill, and further improves the detection efficiency.

Description

Quality detection device of windmill main shaft in wind power generation
Technical Field
The invention relates to the technical field of detection devices, in particular to a quality detection device for a windmill spindle in wind power generation.
Background
The quality detection device for the main shaft of the windmill in wind power generation is provided for solving the problems that the main shaft of the windmill needs to be detected when being machined, a detection device needs to be used when the main shaft is detected, most of the existing detection devices are complex in structure, troublesome in operation and complex in operation when the main shaft is fixed, but the detection of the main shaft on the windmill is inconvenient due to the fact that most of the main shafts are large in number of times when being detected.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides the quality detection device of the windmill main shaft in wind power generation, which has the advantages of being convenient for fixing the windmill main shaft, further improving the main shaft detection efficiency and the like, and solves the problem that the main shaft is inconvenient to fix in the prior art.
(II) technical scheme
In order to realize the purpose of conveniently fixing the windmill main shaft and further improving the main shaft detection efficiency, the invention provides the following technical scheme: a quality detection device of a windmill spindle in wind power generation comprises a detection table, wherein a first sliding groove is formed in the top of the detection table, a containing groove is formed in one side groove wall of the detection table, which is located right below the first sliding groove, the bottom of the first sliding groove is rotatably connected with a transfer rod through a first bearing, the first bearing is fixedly arranged on the bottom of the first sliding groove, two fixed plates are symmetrically connected in the first sliding groove through a transfer mechanism, a rotating mechanism is arranged on each fixed plate, and a control mechanism is arranged in each containing groove;
the transfer mechanism comprises two first sliding blocks, a threaded rod, a first bevel gear and a second bevel gear, the two first sliding blocks are symmetrically and slidably connected in a first sliding groove, a threaded hole is formed in the first sliding block in the first sliding groove, symmetrically arranged threads are fixedly arranged on the rod wall of the threaded rod, the threaded rod is in threaded connection in the threaded hole, two ends of the threaded rod extend into the groove wall of the first sliding groove, the threaded rod is rotatably connected with the groove wall of the first sliding groove through a second bearing, the second bearing is fixedly arranged in the groove wall of the first sliding groove, the first bevel gear is fixedly sleeved on the middle rod wall of the threaded rod, the second bevel gear is fixedly connected to the upper end of the middle rotating rod, and the first bevel gear is meshed with the second bevel gear;
control the mechanism and include gear, extension spring and rack, gear fixed connection is at the lower extreme of transfer lever, extension spring fixed connection is on the tank bottom of accomodating the groove, the other end and the rack fixed connection of extension spring, and rack and gear mesh mutually, the one end that the extension spring was kept away from to the rack passes the notch of accomodating the groove and outwards extends.
Preferably, rotary mechanism includes the rotary rod, the rotary rod passes through the third bearing and rotates to be connected on the fixed plate, and the third bearing is fixed to be established on the fixed plate, two the rotary rod sets up on two fixed plate lateral walls in opposite directions, the one end fixedly connected with rotor plate of fixed plate is kept away from to the rotary rod, the draw-in groove has been seted up on the lateral wall that the rotary rod was kept away from to the rotor plate.
Preferably, the second sliding grooves are symmetrically formed in the opposite groove walls of the accommodating grooves, the second sliding grooves are located on one side, away from the groove openings of the accommodating grooves, of the gear, the second sliding blocks are connected in the second sliding grooves in a sliding mode, and the opposite ends of the second sliding blocks penetrate through the groove openings of the corresponding second sliding grooves and extend outwards and are fixedly connected with the racks.
Preferably, a ball groove is formed in one end, close to the bottom of the first sliding groove, of the first sliding block, a ball is connected in the ball groove in a rolling mode, and one end, far away from the bottom of the ball groove, of the ball penetrates through a notch of the ball groove and extends outwards and is connected with the bottom of the first sliding groove in a rolling mode.
Preferably, one end of the rack, which is far away from the tension spring, is fixedly connected with a pull ring, and the ring diameter of the pull ring is larger than the groove diameter of the opening of the accommodating groove.
Preferably, the bottom of the detection table is symmetrically and fixedly connected with a supporting plate.
Preferably, a placing plate is fixedly connected between the two supporting plates.
Preferably, the detection table and the fixing plate are both coated with antirust paint.
Preferably, a rubber pad is fixedly connected to the groove wall of the clamping groove.
(III) advantageous effects
Compared with the prior art, the invention provides a quality detection device of a windmill main shaft in wind power generation, which has the following beneficial effects:
when the spindle on the windmill needs to be clamped, the rack is pulled in the direction away from the tension spring, the rack drives the gear to rotate, the transfer rod rotates, the second bevel gear rotates, the first bevel gear rotates, the screw rotates, and the two fixing plates move in opposite directions, the spindle to be detected is inserted into the clamping groove on one of the rotating plates, the tension on the rack is released, the tension spring resets, the rack resets, and the fixing plates reset, and the spindle is fixed, so that the spindle is convenient to fix, and the detection efficiency is improved, because the rotatory piece cooperation bull stick effect for rotatory piece can be rotatory, and then is convenient for detect the main shaft from different angles.
Drawings
Fig. 1 is a schematic structural diagram of a device for detecting the mass of a windmill spindle in wind power generation according to the present invention;
FIG. 2 is an enlarged view of portion A of FIG. 1;
FIG. 3 is an enlarged view of portion B of FIG. 1;
fig. 4 is an enlarged view of a portion C in fig. 1.
In the figure: the device comprises a detection table 1, a first sliding groove 2, a receiving groove 3, a rotating rod 4, a fixing plate 5, a first sliding block 6, a threaded rod 7, a first bevel gear 8, a second bevel gear 9, a threaded hole 10, a gear 11, a tension spring 12, a rack 13, a rotating rod 14, a rotating plate 15, a clamping groove 16, a second sliding groove 17, a second sliding block 18, a ball groove 19, balls 20 and a supporting plate 21.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-4, a quality detection device for a windmill spindle in wind power generation comprises a detection table 1, wherein a first chute 2 is formed at the top of the detection table 1, a containing groove 3 is formed in a groove wall of one side of the detection table 1, which is located right below the first chute 2, the bottom of the first chute 2 is rotatably connected with a transit rod 4 through a first bearing, the first bearing is fixedly arranged on the bottom of the first chute, two fixing plates 5 are symmetrically connected in the first chute 2 through a transit mechanism, a rotating mechanism is arranged on the fixing plates 5, and a control mechanism is arranged in the containing groove 3;
the transfer mechanism comprises two first sliding blocks 6, a threaded rod 7, a first bevel gear 8 and a second bevel gear 9, the two first sliding blocks 6 are symmetrically and slidably connected in a first sliding groove 2, a threaded hole 10 is formed in the first sliding block 6 in the first sliding groove 2, symmetrically arranged threads are fixedly arranged on the rod wall of the threaded rod 7, the threaded rod 7 is in threaded connection in the threaded hole 10, two ends of the threaded rod 7 extend into the groove wall of the first sliding groove 2, the threaded rod 7 is rotatably connected with the groove wall of the first sliding groove through a second bearing, the second bearing is fixedly arranged in the groove wall of the first sliding groove 2, the first bevel gear 8 is fixedly sleeved on the middle rod wall of the threaded rod 7, the second bevel gear 9 is fixedly connected to the upper end of the middle rotating rod 4, and the first bevel gear 8 is meshed with the second bevel;
the control mechanism comprises a gear 11, a tension spring 12 and a rack 13, the gear 11 is fixedly connected with the lower end of the transit bar 4, the tension spring 12 is fixedly connected with the bottom of the accommodating groove 3, the other end of the tension spring 12 is fixedly connected with the rack 13, the rack 13 is meshed with the gear 11, one end of the rack 13 far away from the tension spring 12 penetrates through a notch of the accommodating groove 3 and extends outwards, the rotating mechanism comprises a rotating rod 14, the rotating rod 14 is rotatably connected with the fixing plate 5 through a third bearing, the third bearing is fixedly arranged on the fixing plate 5, two rotating rods 14 are arranged on opposite side walls of the two fixing plates 5, one end of the rotating rod 14 far away from the fixing plate 5 is fixedly connected with a rotating plate 15, a clamping groove 16 is formed in the side wall of the rotating plate 15 far away from the rotating rod 14, when a main shaft on the windmill needs to be clamped, the rack 13, make to make the transfer link 4 rotatory, and then make second bevel gear 9 rotatory, second bevel gear 9 makes first bevel gear 8 rotatory, and then screw rod 7 is rotatory, and then make two fixed plates 5 carry out the motion of opposite direction, the main shaft that will detect is inserted and is established in draw-in groove 16 on one of them rotor plate 15, cancel the pulling force to rack 13, extension spring 12 resets, and then rack 13 resets, and then make fixed plate 5 reset, fix the main shaft, be convenient for the fixing of main shaft, and then improve the efficiency that detects, because the effect of rotatory piece 15 cooperation transfer link 4, make rotatory piece 15 can rotate, and then be convenient for detect the main shaft from different angles.
Receive and seted up second spout 17 on the relative cell wall of groove 3 symmetrically, and second spout 17 is located gear 11 and keeps away from the one side of receiving groove 3 notch, and sliding connection has second slider 18 in second spout 17, and two blocks of second slider 18 one end in opposite directions all pass the notch that corresponds second spout 17 and outwards extend, and all with rack 13 fixed connection, prevent that rack 13 from breaking away from the condition emergence of receiving groove 3.
The ball groove 19 has been seted up to the one end that first slider 6 is close to 2 tank bottoms of first spout, and ball groove 19 is interior to roll and is connected with ball 20, and ball 20 is kept away from the one end of 19 tank bottoms of ball groove and is passed 19 notch in the ball groove and outwards extend, and with the tank bottom rolling connection of first spout 2, makes the gliding more swift of first slider 6.
One end of the rack 13, which is far away from the tension spring 12, is fixedly connected with a pull ring, and the ring diameter of the pull ring is larger than the groove diameter of the notch of the accommodating groove 3, so that the rack 13 can be conveniently pulled.
The bottom of the detection table 1 is symmetrically and fixedly connected with a support plate 21 for supporting the detection table 1.
The placing plate is fixedly connected between the two supporting plates 21 and used for placing idle articles.
All scribble the anti-rust paint on examining test table 1 and the fixed plate 5, prevent to examine the rusty condition of test table 1 and fixed plate 5 and take place.
The groove wall of the clamping groove 16 is fixedly connected with a rubber pad, so that the main shaft is convenient to limit.
In summary, in the quality detecting device for the wind turbine main shaft in wind power generation, when the wind turbine main shaft needs to be clamped, the rack 13 is pulled in a direction away from the tension spring 12, and the rack 13 rotates the gear 11, so that the transfer rod 4 rotates, and further the second bevel gear 9 rotates, the second bevel gear 9 rotates the first bevel gear 8, the screw 7 rotates, so that the two fixing plates 5 move in opposite directions, the spindle to be detected is inserted into the clamping groove 16 on one of the rotating plates 15, the tension on the rack 13 is relieved, the tension spring 12 resets, the rack 13 resets, and the fixing plates 5 reset, fix the main shaft, the main shaft of being convenient for is fixed, and then improves the efficiency that detects, because rotatory piece 15 cooperates the effect of bull stick 4 for rotatory piece 15 can rotate, and then is convenient for detect the main shaft from different angles.
It is to be noted that the term "comprises," "comprising," or any other variation thereof is intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (9)

1. The utility model provides a quality detection device of windmill main shaft in wind power generation, includes detects platform (1), its characterized in that: the detection device is characterized in that a first sliding groove (2) is formed in the top of the detection platform (1), an accommodating groove (3) is formed in one side groove wall of the detection platform (1) and located under the first sliding groove (2), the groove bottom of the first sliding groove (2) is rotatably connected with a transfer rod (4) through a first bearing, the first bearing is fixedly arranged on the groove bottom of the first sliding groove, two fixing plates (5) are symmetrically connected in the first sliding groove (2) through a transfer mechanism, a rotating mechanism is mounted on each fixing plate (5), and a control mechanism is mounted in each accommodating groove (3);
the transfer mechanism comprises two first sliding blocks (6), a threaded rod (7), a first bevel gear (8) and a second bevel gear (9), wherein the two first sliding blocks (6) are symmetrically and slidably connected in a first sliding groove (2), a threaded hole (10) is formed in the first sliding block (6) in the first sliding groove (2), symmetrically arranged threads are fixedly arranged on the rod wall of the threaded rod (7), the threaded rod (7) is in threaded connection in the threaded hole (10), two ends of the threaded rod (7) extend into the groove wall of the first sliding groove (2), the threaded rod (7) is rotatably connected with the groove wall of the first sliding groove through a second bearing, the second bearing is fixedly arranged in the groove wall of the first sliding groove (2), the first bevel gear (8) is fixedly sleeved on the middle rod wall of the threaded rod (7), and the second bevel gear (9) is fixedly connected to the upper end of the middle rotating rod (4), the first bevel gear (8) is meshed with the second bevel gear (9);
control mechanism includes gear (11), extension spring (12) and rack (13), gear (11) fixed connection is at the lower extreme of transfer lever (4), extension spring (12) fixed connection is on the groove bottom of accomodating groove (3), the other end and rack (13) fixed connection of extension spring (12), and rack (13) mesh mutually with gear (11), the notch of accomodating groove (3) is passed and outwards extends in the one end that extension spring (12) were kept away from in rack (13).
2. The device for detecting the quality of the windmill spindle in wind power generation according to claim 1, wherein: rotary mechanism includes rotary rod (14), rotary rod (14) rotate through the third bearing and connect on fixed plate (5), and the third bearing is fixed to be established on fixed plate (5), two rotary rod (14) set up on two fixed plate (5) lateral walls in opposite directions, the one end fixedly connected with rotor plate (15) of fixed plate (5) are kept away from to rotary rod (14), draw-in groove (16) have been seted up on rotor plate (15) keep away from the lateral wall of rotary rod (14).
3. The device for detecting the quality of the windmill spindle in wind power generation according to claim 1, wherein: second spout (17) have been seted up to the symmetry on the relative cell wall of accomodating groove (3), and second spout (17) are located gear (11) and keep away from the one side of accomodating groove (3) notch, sliding connection has second slider (18) in second spout (17), two the notch that corresponds second spout (17) is all passed to second slider (18) one end in opposite directions and outwards extends, and all with rack (13) fixed connection.
4. The device for detecting the quality of the windmill spindle in wind power generation according to claim 1, wherein: ball groove (19) have been seted up to first slider (6) one end near first spout (2) tank bottom, roll in ball groove (19) and be connected with ball (20), ball groove (19) tank bottom was kept away from in ball (20) one end pass ball groove (19) notch and outside extension, and with the tank bottom roll connection of first spout (2).
5. The device for detecting the quality of the windmill spindle in wind power generation according to claim 1, wherein: one end of the rack (13) far away from the tension spring (12) is fixedly connected with a pull ring, and the ring diameter of the pull ring is larger than the groove diameter of the notch of the accommodating groove (3).
6. The device for detecting the quality of the windmill spindle in wind power generation according to claim 1, wherein: the bottom of the detection table (1) is symmetrically and fixedly connected with a support plate (21).
7. The apparatus for detecting the quality of a wind turbine main shaft in wind power generation according to claim 6, wherein: a placing plate is fixedly connected between the two supporting plates (21).
8. The device for detecting the quality of the windmill spindle in wind power generation according to claim 1, wherein: and the detection platform (1) and the fixing plate (5) are coated with antirust paint.
9. The device for detecting the quality of the windmill spindle in wind power generation according to claim 2, characterized in that: and a rubber pad is fixedly connected to the groove wall of the clamping groove (16).
CN201911179899.7A 2019-11-27 2019-11-27 Quality detection device of windmill main shaft in wind power generation Pending CN111220366A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911179899.7A CN111220366A (en) 2019-11-27 2019-11-27 Quality detection device of windmill main shaft in wind power generation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911179899.7A CN111220366A (en) 2019-11-27 2019-11-27 Quality detection device of windmill main shaft in wind power generation

Publications (1)

Publication Number Publication Date
CN111220366A true CN111220366A (en) 2020-06-02

Family

ID=70810920

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201911179899.7A Pending CN111220366A (en) 2019-11-27 2019-11-27 Quality detection device of windmill main shaft in wind power generation

Country Status (1)

Country Link
CN (1) CN111220366A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112946311A (en) * 2021-03-22 2021-06-11 李琪 Multifunctional detection platform for detecting rotating speed of motor and application method thereof
CN115165428A (en) * 2022-09-06 2022-10-11 山东中茂散热器有限公司 Radiator testing device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN204855157U (en) * 2015-08-28 2015-12-09 国电联合动力技术(连云港)有限公司 Wind generating set main shaft system test platform
JP2018159623A (en) * 2017-03-23 2018-10-11 Ntn株式会社 Condition monitoring device
CN208409791U (en) * 2018-04-13 2019-01-22 长春诚成汽车零部件有限公司 Workbench is used in a kind of assembling of auto-parts
CN109507189A (en) * 2018-12-29 2019-03-22 广州丰桥智能装备有限公司 A kind of multi-vehicle-type engine automation quality inspection device
CN209036466U (en) * 2018-09-11 2019-06-28 天津龙驰机械制造股份有限公司 Workbench is used in a kind of machining

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN204855157U (en) * 2015-08-28 2015-12-09 国电联合动力技术(连云港)有限公司 Wind generating set main shaft system test platform
JP2018159623A (en) * 2017-03-23 2018-10-11 Ntn株式会社 Condition monitoring device
CN208409791U (en) * 2018-04-13 2019-01-22 长春诚成汽车零部件有限公司 Workbench is used in a kind of assembling of auto-parts
CN209036466U (en) * 2018-09-11 2019-06-28 天津龙驰机械制造股份有限公司 Workbench is used in a kind of machining
CN109507189A (en) * 2018-12-29 2019-03-22 广州丰桥智能装备有限公司 A kind of multi-vehicle-type engine automation quality inspection device

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
何先照: "基于大型风电机组主轴组件装配方法的研究", 《装备制造技术》 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112946311A (en) * 2021-03-22 2021-06-11 李琪 Multifunctional detection platform for detecting rotating speed of motor and application method thereof
CN115165428A (en) * 2022-09-06 2022-10-11 山东中茂散热器有限公司 Radiator testing device
CN115165428B (en) * 2022-09-06 2022-11-29 山东中茂散热器有限公司 Radiator testing device

Similar Documents

Publication Publication Date Title
CN111220366A (en) Quality detection device of windmill main shaft in wind power generation
CN106644570B (en) A kind of Autosampler can be used simultaneously multiple cutting ring samplings
CN208320875U (en) A kind of clinical laboratory's blood sample test tube frame
CN210401348U (en) Indoor environment monitoring device
CN209209346U (en) A kind of physics experiments of high school storage box
CN109185641A (en) A kind of instrument and meter rotary positioning apparatus
CN219201319U (en) Anti-slip coefficient detector
CN207478628U (en) A kind of convertible medical inspection sampling bench
CN114839581A (en) Avoid waterproof check out test set of current transformer of potential safety hazard
CN211826115U (en) Wind speed detection device for plain weather
CN209905378U (en) Safety protection mechanism for blood bag in dry liquid nitrogen container cold chain transportation
CN102896613B (en) Device for taking roll paper tube out
CN209840918U (en) Portable cable diameter detection device
CN210323119U (en) Outdoor power equipment detection device
CN208601476U (en) A kind of instrument and meter apparatus for examination and repair
CN215812132U (en) Terminal cross section analysis appearance convenient to operation
CN216583611U (en) Portable insulation resistance tester
CN212076024U (en) Rewinding machine for producing tea filter paper
CN213633129U (en) Novel winding wire paint film detection device
CN215917597U (en) Food detection sample crushing device
CN212448603U (en) Portable digital water quality rapid detection case
CN216816530U (en) Capacitance type grain moisture online detection device
CN213562543U (en) Plastic tool box convenient to carry
CN213875659U (en) Portable water quality tester with high safety performance
CN213800354U (en) Automatic weighing device for steel tube packaging

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
RJ01 Rejection of invention patent application after publication

Application publication date: 20200602

RJ01 Rejection of invention patent application after publication