CN108152089A - A kind of filter membrane clamping device with self-locking shock-absorbing function - Google Patents
A kind of filter membrane clamping device with self-locking shock-absorbing function Download PDFInfo
- Publication number
- CN108152089A CN108152089A CN201810129262.6A CN201810129262A CN108152089A CN 108152089 A CN108152089 A CN 108152089A CN 201810129262 A CN201810129262 A CN 201810129262A CN 108152089 A CN108152089 A CN 108152089A
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- China
- Prior art keywords
- filter membrane
- axostylus axostyle
- fixed seat
- absorbing function
- clamping device
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2202—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling
- G01N1/2205—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling with filters
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Molecular Biology (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
The invention discloses a kind of filter membrane clamping devices with self-locking shock-absorbing function, including fixed seat and air inlet seat, the lower end of the fixed seat is connected with air exhaust nozzle, and the upper surface of fixed seat is provided with lower seal, the upper surface of the fixed seat is provided with dashpot, and the inner bottom surface of dashpot is connected by the 4th compressed spring with limit base, the lower surface of the air inlet seat is provided with sealing ring, and filter membrane is installed between upper sealing ring and lower seal, mounting blocks are respectively connected at left and right sides of the fixed seat, bearing and adjusting block, and mounting blocks, bearing and adjusting block are sequentially distributed from bottom to up in the left and right sides of fixed seat.The filter membrane clamping device with self-locking shock-absorbing function has auto-lock function, and has shock-absorbing function, when so that the sealing ring is contacted with filter membrane, its speed levels off to zero, so as to reduce vibrations of the clamping device when replacing filter membrane to the greatest extent, so as to be conducive to accurately assess the pollution sources of air quality and pollution gas.
Description
Technical field
The present invention relates to filter membranes to clamp engineering device technique field, specially a kind of filter membrane clamping dress with self-locking shock-absorbing function
It puts.
Background technology
It is generally required when being detected to air and either pollution gas being detected and captures air or pollution
Particulate matter in gas so as to assess the pollution sources of air quality and pollution gas, in the prior art, is generally adopted
With the particulate matter in filter membrane method acquisition air either pollution gas in filter membrane method acquisition air or pollution gas is used
Particulate matter when, need by filter membrane be mounted on filter membrane clamping device on use.
But existing filter membrane clamping device does not have auto-lock function and shock-absorbing function, this causes to the filter membrane clamping device
When carrying out the replacement of filter membrane, filter membrane easily is shaken, acquire the accuracy of particulate matter so as to which it will be influenced, be unfavorable for accurately commenting
Estimate the pollution sources of air quality and pollution gas.
Invention content
The purpose of the present invention is to provide a kind of filter membrane clamping device with self-locking shock-absorbing function, to solve above-mentioned background skill
The existing filter membrane clamping device that art proposes does not have the problem of auto-lock function and shock-absorbing function.
To achieve the above object, the present invention provides following technical solution：
A kind of filter membrane clamping device with self-locking shock-absorbing function, including fixed seat and air inlet seat, the lower end of the fixed seat
It is connected with air exhaust nozzle, and the upper surface of fixed seat is provided with lower seal, the lower surface of the air inlet seat is fixedly installed close
Seal, and filter membrane is installed between upper sealing ring and lower seal,
The upper surface of the fixed seat is provided with dashpot, and the 4th compressed spring is fixed on the inner bottom surface of dashpot, the
Four compressed spring upper ends are connected with limit base, and limit base is located at the outer rim of filter membrane；
Mounting blocks, bearing and adjusting block, and mounting blocks, bearing and tune have been fixedly connected at left and right sides of the fixed seat
Locking nub, which is sequentially distributed from bottom to up on the left and right sides of fixed seat, the adjusting block, is provided with limiting slot, and pacifies in limiting slot
Equipped with adjustment disk, the adjustment disk is set to the outside of axostylus axostyle, and the upper end of axostylus axostyle is connected with top plate, and the upper end of the axostylus axostyle is passed through
Link block is worn, and is connected between the upper surface of link block and the lower surface of top plate by the second compressed spring, the link block
Lower surface and the upper surface of adjusting block between be connected by the first compressed spring, and link block is fixedly installed on air inlet seat
The left and right sides, first compressed spring and the second compressed spring may be contained within the outside of axostylus axostyle, and axis is run through in the lower end of axostylus axostyle
It holds and is arranged in straight slot, the straight slot is set to the inside of mounting blocks, and straight slot is connected by Fair faces vortex spring with axostylus axostyle, institute
The medial surface for stating straight slot is provided with sliding slot, and sliding slot is connected by sliding block with lock collar, and the upper end of sliding block passes through third pressure
Contracting spring is connected with the bottom of sliding slot, and the medial surface of the lock collar is provided with pawl, and pawl is connected by ratchet with axostylus axostyle
It connects, and ratchet is set to the outside of axostylus axostyle lower end, the lower end of the lock collar is connected with draw ring.
Specifically, the cross section structure shape of the limit base and dashpot is arc, and the size and buffering of limit base
The size of slot matches, and the material of limit base upper surface is silica gel.
Specifically, the link block is connected by the way of being threadedly coupled with axostylus axostyle, and axostylus axostyle is using interference fit
Mode is connected with bearing.
Specifically, the cross section structure shape of the lock collar is " recessed " type, and the outside of lock collar equal angular is provided with 4 cunnings
Block, and the number of sliding block is identical with the number of sliding slot.
Specifically, the length of the sliding slot is more than the thickness of lock collar.
Specifically, the equal angular outside for being arranged on axostylus axostyle lower end of the ratchet, and ratchet is by the way of engaging and spine
Pawl is connected.
Compared with prior art, the beneficial effects of the invention are as follows：The filter membrane clamping device with self-locking shock-absorbing function has
Auto-lock function, and have shock-absorbing function, when so that the sealing ring is contacted with filter membrane, speed levels off to zero, so as to maximum journey
Vibrations of the reduction of the degree clamping device when replacing filter membrane, so as to be conducive to accurately assess air quality and pollution gas
Pollution sources；
(1) setting of bearing is avoided that axostylus axostyle moves, and the rotation that axostylus axostyle can be convenient for stablize, so as to pass through axostylus axostyle
Rotation drives air inlet seat to move in vertical direction；
(2) setting of adjusting block, limiting slot and adjustment disk can be convenient for user to drive axostylus axostyle rotation, and can be further
Axostylus axostyle is made to keep plumbness；
The setting of (3) first compressed springs can delay its movement speed when air inlet seat is moved vertically downward, so as to
Reduce the vibrations of filter membrane；
(4) setting of link block can drive air inlet seat to move up and down in vertical direction, so as to adjust when axostylus axostyle rotates
The distance between lower seal and upper sealing ring are saved, filter membrane is replaced so as to be conducive to user；
(5) setting of top plate and the second compressed spring can promote air inlet seat to move vertically downward when axostylus axostyle rotates backward
When；
(6) setting of Fair faces vortex spring can be convenient for storing kinetic energy when axostylus axostyle rotates forward, so as in axostylus axostyle reversely turn
When dynamic, the kinetic energy of storage is discharged, axostylus axostyle is promoted to rotate backward, in order to which air inlet seat moves downward vertically, so as to have the device
Standby auto-lock function；
(7) setting of lock collar, sliding slot, sliding block, pawl and ratchet can prevent axostylus axostyle from rotating backward, so as to make lower seal
The distance between upper sealing ring keeps stablizing, in order to which user replaces filter membrane；
(8) setting of limit base and the 4th compressed spring can further reduce the speed that air inlet seat is moved vertically downward,
So as to be conducive to upper sealing ring when being contacted with filter membrane, speed levels off to zero, so as to reduce the shake of filter membrane to the greatest extent
It is dynamic, and abrasion when part is touched on the device can be reduced, be conducive to increase the service life of the device.
Description of the drawings
Fig. 1 is a kind of filter membrane clamping device main structure diagram with self-locking shock-absorbing function of the present invention；
Fig. 2 is a kind of filter membrane clamping device mounting blocks with self-locking shock-absorbing function of the present invention and the signal of axostylus axostyle connection structure
Figure；
Fig. 3 is a kind of filter membrane clamping device A point enlarged structure schematic diagrams with self-locking shock-absorbing function of the present invention；
Fig. 4 is that a kind of filter membrane with self-locking shock-absorbing function of the present invention clamps assembly axis bar and lock collar attachment structure schematic diagram；
Fig. 5 is a kind of filter membrane clamping device fixed seat surface structure schematic diagram with self-locking shock-absorbing function of the present invention；
Fig. 6 is a kind of filter membrane clamping device limit base with self-locking shock-absorbing function of the present invention and the signal of dashpot connection structure
Figure；
Fig. 7 connects cross-section structure with adjustment disk for a kind of filter membrane clamping assembly axis bar with self-locking shock-absorbing function of the present invention and shows
It is intended to.
In figure：1st, fixed seat, 2, air exhaust nozzle, 3, lower seal, 4, filter membrane, 5, upper sealing ring, 6, limit base, 7, air inlet
Seat, 8, mounting blocks, 9, bearing, 10, adjusting block, 11, limiting slot, 12, adjustment disk, 13, axostylus axostyle, the 14, first compressed spring, 15,
Link block, the 16, second compressed spring, 17, top plate, 18, draw ring, 19, straight slot, 20, Fair faces vortex spring, 21, lock collar, 22, sliding slot,
23rd, sliding block, 24, third compressed spring, 25, pawl, 26, ratchet, 27, dashpot, the 28, the 4th compressed spring.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other without making creative work
Embodiment shall fall within the protection scope of the present invention.
- 7 are please referred to Fig.1, the present invention provides a kind of technical solution：
A kind of filter membrane clamping device with self-locking shock-absorbing function, including fixed seat 1 and air inlet seat 7, the lower end of fixed seat 1 connects
Air exhaust nozzle 2 being connected to, and the upper surface of fixed seat 1 is provided with lower seal 3, the upper surface of fixed seat 1 is provided with dashpot 27, and
The inner bottom surface of dashpot 27 is connected by the 4th compressed spring 28 with limit base 6, and the lower surface of air inlet seat 7 is provided with sealing
Circle 5, and filter membrane 4 is installed between upper sealing ring 5 and lower seal 3, the left and right sides of fixed seat 1 is respectively connected with mounting blocks 8, axis
9 and adjusting block 10 are held, and mounting blocks 8, bearing 9 and adjusting block 10 are sequentially distributed from bottom to up in the left and right sides of fixed seat 1, are adjusted
Limiting slot 11 is provided in locking nub 10, and adjustment disk 12 is installed in limiting slot 11, adjustment disk 12 is set to the outside of axostylus axostyle 13,
And the upper end of axostylus axostyle 13 is connected with top plate 17, link block 15, and the upper surface of link block 15 and top plate are run through in the upper end of axostylus axostyle 13
It is connected between 17 lower surface by the second compressed spring 16, between the lower surface of link block 15 and the upper surface of adjusting block 10
It is connected by the first compressed spring 14, and link block 15 is set to the left and right sides of air inlet seat 7, the first compressed spring 14 and
Two compressed springs 16 may be contained within the outside of axostylus axostyle 13, and the lower end of axostylus axostyle 13 is arranged on through bearing 9 in straight slot 19, straight slot 19
The inside of mounting blocks 8 is set to, and straight slot 19 is connected by Fair faces vortex spring 20 with axostylus axostyle 13, the medial surface setting of straight slot 19
There is sliding slot 22, and sliding slot 22 is connected by sliding block 23 with lock collar 21, the upper end of sliding block 23 by third compressed spring 24 and is slided
The bottom of slot 22 is connected, and the medial surface of lock collar 21 is provided with pawl 25, and pawl 25 is connected by ratchet 26 with axostylus axostyle 13,
And ratchet 26 is set to the outside of 13 lower end of axostylus axostyle, and the lower end of lock collar 21 is connected with draw ring 18.
The cross section structure shape of limit base 6 and dashpot 27 is arc, and the size of limit base 6 and dashpot 27 is big
It is small to match, and the material of 6 upper surface of limit base is silica gel, and abrasion when can be convenient for reducing part touching on the device has
Conducive to the service life for increasing the device.
Link block 15 is connected by the way of being threadedly coupled with axostylus axostyle 13, and axostylus axostyle 13 using by the way of being interference fitted and
Bearing 9 is connected, and link block 15 can be driven to move in vertical direction, and can be convenient for 13 turns of axostylus axostyle by the rotation of axostylus axostyle 13
It is dynamic.
The cross section structure shape of lock collar 21 is " recessed " type, and lock collar 21 outside it is equal angular be provided with 4 sliding blocks 23, and
And the number of sliding block 23 is identical with the number of sliding slot 22, is avoided that lock collar 21 rotates, and hinders axostylus axostyle 13 so as to be conducive to lock collar 21
It rotates backward.
The length of sliding slot 22 is more than the thickness of lock collar 21, and the cross section structure shape of lock collar 21 and the cross section structure of straight slot 19
Shape is identical, ratchet 26 and pawl 25 can be convenient for mutually stagger, so as to be convenient for axostylus axostyle 13 under the action of Fair faces vortex spring 20
It rotates backward.
The equal angular outside for being arranged on 13 lower end of axostylus axostyle of ratchet 26, and ratchet 26 using engaging by the way of with 25 phase of pawl
Connection, make axostylus axostyle 13 can only one direction rotation, so as to make the distance between lower seal 3 and upper sealing ring 5 keep stablize, have
Filter membrane 4 is replaced conducive to user.
The operation principle of the present embodiment：Adjustment disk 12 is rotated first, makes adjustment disk 12 that axostylus axostyle 13 be driven to rotate, due to axostylus axostyle
13 are connected by the way of being threadedly coupled with link block 15, and link block 15 is arranged in air inlet seat 7, Gu axostylus axostyle 13 is turning
When dynamic, air inlet seat 7 will vertically upward be moved by link block 15 on axostylus axostyle 13, and the second compressed spring 16 will be extruded at this time,
So as to 7 one downward power of air inlet seat, while the first compressed spring 14 will gradually be stretched, and the lower surface of air inlet seat 7 by
Gradually the upper surface with limit base 6 detaches, so as to which the distance between lower seal 3 and upper sealing ring 5 be made to be expanded to certain size,
And 20 store kinetic energy of Fair faces vortex spring, since the lower end of axostylus axostyle 13 is engaged, and pawl 25 is set by ratchet 26 with pawl 25
It is placed on the medial surface of lock collar 21, and lock collar 21 is connect by sliding block 23 with sliding slot 22, so lock collar 21 can not in straight slot 19
Rotation, solid lock disk 21 will hinder axostylus axostyle 13 to rotate backward, so as to make the distance between lower seal 3 and upper sealing ring 5 guarantor
Hold constant, then filter membrane 4 between lower seal 3 and upper sealing ring 5 replaces, and limit base 6 can avoid filter membrane 4 from skidding off this
Device；
After filter membrane 4 is replaced, lock collar 21 is pulled down by draw ring 18, lock collar 21 is made to be slided on sliding slot 22 by sliding block 23,
So as to which the ratchet 26 for making the pawl 25 in lock collar 21 and 13 lower end outside of axostylus axostyle mutually staggers, so as to which axostylus axostyle 13 be enable to pass through Fair faces
It is rotated backward under the action of the energy of the storage of vortex spring 20 and the second compressed spring 16, so as to which air inlet seat 7 be made to pass through link block 15
It is moved vertically downward on axostylus axostyle 13, during air inlet seat 7 is moved vertically downward, the elasticity of the first compressed spring 14 is gradually
Reduce, so as to gradually reduce the speed that air inlet seat 7 is moved vertically downward, when 7 lower surface of air inlet seat is contacted with 6 upper surface of limit base
When, since the material of 6 upper surface of limit base is silica gel, limit base 6 and 7 hard contact of air inlet seat can be avoided, can not only be reduced
The vibrations of the device, and loss when part is touched on the device can be reduced, while the 4th compressed spring 28 can further subtract
The speed that small air inlet seat 7 is moved vertically downward, so that when the upper sealing ring 5 of 7 lower surface of air inlet seat is touched with filter membrane 4, into
The speed that gas seat 7 is moved vertically downward levels off to zero, when replacing filter membrane 4 so as to reduce the device, the vibrations of generation, in order to
The device is smoothly run, and finally unclamps again draw ring 18, and sliding block 23 is made to drive lock collar 21 under the action of third compressed spring 24
It moves up, so as to which the pawl 25 of 21 medial surface of lock collar and the ratchet 26 of 13 lower end outside of axostylus axostyle be made to be connected together, in order to incite somebody to action
What filter membrane 4 was stablized is stuck between lower seal 3 and upper sealing ring 5, and the content not being described in detail in this specification belongs to this
The prior art well known to skilled artisan.
It is to be appreciated that term " " center ", " longitudinal direction ", " transverse direction ", "front", "rear", "left", "right", " vertical ", " water
It is flat ", " top ", " bottom ", " interior ", the orientation of the instructions such as " outer " or position relationship for based on orientation shown in the drawings or position relationship,
Only it is the present invention and simplified description for ease of description rather than indicates or imply signified device or element must have specifically
Orientation is specific azimuth configuration and operation, thus it is not intended that protecting the limitation of content to the present invention.
Although the present invention is described in detail referring to the foregoing embodiments, for those skilled in the art,
It still can modify to the technical solution recorded in foregoing embodiments or which part technical characteristic is carried out etc.
With replacing, all within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in this
Within the protection domain of invention.
Claims (6)
1. a kind of filter membrane clamping device with self-locking shock-absorbing function, including fixed seat (1) and air inlet seat (7), the fixed seat (1)
Lower end be connected with air exhaust nozzle (2), and the upper surface of fixed seat (1) is provided with lower seal (3), under the air inlet seat (7)
Surface is fixedly installed sealing ring (5), and filter membrane (4), feature are equipped between upper sealing ring (5) and lower seal (3)
It is：
The upper surface of the fixed seat (1) is provided with dashpot (27), and the 4th compressed spring (28) is fixed on dashpot (27)
Inner bottom surface, the 4th compressed spring (28) upper end is connected with limit base (6), and limit base (6) is at the outer rim of filter membrane (4)；
Mounting blocks (8), bearing (9) and adjusting block (10), and mounting blocks have been fixedly connected at left and right sides of the fixed seat (1)
(8), bearing (9) and adjusting block (10) are sequentially distributed from bottom to up on the left and right sides of fixed seat (1), the adjusting block (10)
Limiting slot (11) is provided with, and adjustment disk (12) is installed in limiting slot (11), the adjustment disk (12) is set to axostylus axostyle (13)
Outside, and the upper end of axostylus axostyle (13) is connected with top plate (17), and the upper end of the axostylus axostyle (13) is connected through link block (15)
It is connected between the upper surface of block (15) and the lower surface of top plate (17) by the second compressed spring (16), the link block (15)
Lower surface and the upper surface of adjusting block (10) between be connected by the first compressed spring (14), and link block (15) fixation set
The left and right sides of air inlet seat (7) is placed in, first compressed spring (14) and the second compressed spring (16) may be contained within axostylus axostyle
(13) outside, and the lower end of axostylus axostyle (13) is arranged on through bearing (9) in straight slot (19), the straight slot (19) is set to installation
The inside of block (8), and straight slot (19) is connected by Fair faces vortex spring (20) with axostylus axostyle (13), the medial surface of the straight slot (19)
Sliding slot (22) is provided with, and sliding slot (22) is connected by sliding block (23) with lock collar (21), and the upper end of sliding block (23) passes through
Third compressed spring (24) is connected with the bottom of sliding slot (22), and the medial surface of the lock collar (21) is provided with pawl (25), and
Pawl (25) is connected by ratchet (26) with axostylus axostyle (13), and ratchet (26) is set to the outside of axostylus axostyle (13) lower end, institute
The lower end for stating lock collar (21) is connected with draw ring (18).
2. a kind of filter membrane clamping device with self-locking shock-absorbing function according to claim 1, it is characterised in that：The limiting
The cross section structure shape of seat (6) and dashpot (27) is arc, and the size of limit base (6) and the size phase of dashpot (27)
It coincide, and the material of limit base (6) upper surface is silica gel.
3. a kind of filter membrane clamping device with self-locking shock-absorbing function according to claim 1, it is characterised in that：The connection
Block (15) is connected by the way of being threadedly coupled with axostylus axostyle (13), and axostylus axostyle (13) is by the way of being interference fitted and bearing
(9) it is connected.
4. a kind of filter membrane clamping device with self-locking shock-absorbing function according to claim 1, it is characterised in that：The lock collar
(21) cross section structure shape is " recessed " type, and the outside of lock collar (21) equal angular is provided with 4 sliding blocks (23), and sliding block
(23) number is identical with the number of sliding slot (22).
5. a kind of filter membrane clamping device with self-locking shock-absorbing function according to claim 1, it is characterised in that：The sliding slot
(22) length is more than the thickness of lock collar (21), and the cross section structure shape of lock collar (21) and the cross section structure shape of straight slot (19)
It is identical.
6. a kind of filter membrane clamping device with self-locking shock-absorbing function according to claim 1, it is characterised in that：The ratchet
(26) the equal angular outside for being arranged on axostylus axostyle (13) lower end, and ratchet (26) is connected by the way of engaging with pawl (25)
It connects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810129262.6A CN108152089A (en) | 2018-02-08 | 2018-02-08 | A kind of filter membrane clamping device with self-locking shock-absorbing function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810129262.6A CN108152089A (en) | 2018-02-08 | 2018-02-08 | A kind of filter membrane clamping device with self-locking shock-absorbing function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108152089A true CN108152089A (en) | 2018-06-12 |
Family
ID=62457083
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810129262.6A Withdrawn CN108152089A (en) | 2018-02-08 | 2018-02-08 | A kind of filter membrane clamping device with self-locking shock-absorbing function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108152089A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109126304A (en) * | 2018-09-26 | 2019-01-04 | 余欣忆 | A kind of clamping device with self-locking function filter membrane |
| CN110465813A (en) * | 2019-06-28 | 2019-11-19 | 高邮久创信息科技有限公司 | A kind of flat-nose pliers for CNC milling machine |
| CN111251211A (en) * | 2020-01-21 | 2020-06-09 | 新昌县沃意科技有限公司 | Sampling filter paper fixing and clamping device for air detection |
-
2018
- 2018-02-08 CN CN201810129262.6A patent/CN108152089A/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109126304A (en) * | 2018-09-26 | 2019-01-04 | 余欣忆 | A kind of clamping device with self-locking function filter membrane |
| CN109126304B (en) * | 2018-09-26 | 2020-11-10 | 余欣忆 | Clamping device with self-locking function filter membrane |
| CN110465813A (en) * | 2019-06-28 | 2019-11-19 | 高邮久创信息科技有限公司 | A kind of flat-nose pliers for CNC milling machine |
| CN111251211A (en) * | 2020-01-21 | 2020-06-09 | 新昌县沃意科技有限公司 | Sampling filter paper fixing and clamping device for air detection |
| CN111251211B (en) * | 2020-01-21 | 2021-09-10 | 山东圣文环保科技有限公司 | Sampling filter paper fixing and clamping device for air detection |
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| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20180612 |
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| WW01 | Invention patent application withdrawn after publication |