CN108149276B - Powder automatic feeding device - Google Patents
Powder automatic feeding device Download PDFInfo
- Publication number
- CN108149276B CN108149276B CN201711448004.6A CN201711448004A CN108149276B CN 108149276 B CN108149276 B CN 108149276B CN 201711448004 A CN201711448004 A CN 201711448004A CN 108149276 B CN108149276 B CN 108149276B
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- CN
- China
- Prior art keywords
- hopper
- guide rod
- outlet
- blanking tube
- feeding device
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- 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.)
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Classifications
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C3/00—Electrolytic production, recovery or refining of metals by electrolysis of melts
- C25C3/06—Electrolytic production, recovery or refining of metals by electrolysis of melts of aluminium
- C25C3/14—Devices for feeding or crust breaking
Abstract
The invention discloses a kind of powder automatic feeding devices, are related to powder feed technical field, solve the problem of that existing powder feeder cannot realize automatic shutter hopper outlet under the premise of no electricity gentle conduct power.The technical solution adopted by the present invention is that: powder automatic feeding device, the outlet of hopper connects blanking tube, two sliding slots are arranged in the side wall of blanking tube, transverse connecting rod is worn between sliding slot, it is arranged sliding sleeve on the outside of blanking tube, transverse connecting rod is connected and fixed with sliding sleeve, and transverse connecting rod wears guide rod in blanking tube, guide rod upper end passes through the outlet of hopper and installs belljar valve, and the downside outer edge of belljar valve can closely be fastened with hopper outlet.It is gentle as power using additional electricity that the opening and closing of powder automatic feeding device are not needed, and cooperates charging box to realize by feeding device itself, avoids the inconvenience of electric wire arrangement and tracheae, and production is simple, at low cost, securely and reliably, throwing when avoiding charging spills, drips, leaking phenomenon.
Description
Technical field
The present invention relates to powder feed technical field, specifically a kind of powder automatic feeding device.
Background technique
In aluminium electroloysis industry, fluoride salt is generally used for reducing electrolyte primary crystal temperature, optimizes electrolyte ingredient, separation of carbon
Slag improves electrolyte conductivity, and during current aluminum electrolysis, fluoride salt is indispensable additive.
At present in aluminum electrolysis, as a kind of powder usually first fluoride salt bin is added in fluoride salt by fluoride salt, then by
Slot control machine control is added to fluoride salt in electrolytic cell from fluoride salt bin at regular time and quantity.Concrete operations will be equipped with fluoride salt
Hopper is sling on electrolytic cell by overhead traveling crane, and worker climbs to upper part of the electrolytic cell, and the blanking tube of artificial righting hopper simultaneously commands overhead traveling crane
Movement is realized the barrel under hopper and the docking of fluoride salt bin feed inlet, is filled to fluoride salt bin.It is artificial to open hopper
Plate after, operating personnel needs to wait in upper part of the electrolytic cell, after fluoride salt bin filling is full, finally manually plugs inserting for hopper
Plate.
Aforesaid operations mode needs ground staff to climb up to climb down electrolytic cell in charging, cooperates the operating personnel of overhead traveling crane operation
It feeds, high altitude operation, which is easy to slip, to be fallen, and is easy to be collided by hopper, there are very big security risks.Moreover, upper part of the electrolytic cell
Temperature is high, flue dust is big, and the reaction of moisture in fluoride and raw material and air in the fused electrolyte of high temperature generates hydrogen fluoride, sternly
The health for damaging production operation personnel again, so there is also the personal injuries to operating personnel.In addition, the throwing of fluoride salt,
It spills, drip, leaking and also affect operating environment, also resulting in unnecessary waste, and time-consuming and laborious.
Summary of the invention
The present invention provides a kind of powder automatic feeding device, and solving existing powder feeder cannot be in no gentle work of electricity
Under the premise of power, realize automatic shutter hopper outlet the problem of.
The technical solution adopted by the present invention to solve the technical problems is: powder automatic feeding device, including hopper, blanking
Cylinder, guide rod, sliding sleeve and belljar valve, the outlet of hopper connect blanking tube, and the side wall of blanking tube is axially arranged along blanking tube
Two sliding slots wear transverse connecting rod between two sliding slots, sliding sleeve are arranged on the outside of blanking tube, sliding sleeve can be along blanking tube
It slides up and down, the both ends of transverse connecting rod are fixedly connected with sliding sleeve respectively, and location hole, location hole is arranged in the middle part of transverse connecting rod
Inside wear guide rod；
Guide rod upper end passes through the outlet of hopper and belljar valve is fixedly mounted, and belljar valve is located at the outlet of hopper inside hopper
Place, belljar valve are a plate-like valve deck put upside down, and the downside outer edge of belljar valve can closely be fastened with hopper outlet；Under guide rod
Section passes through the location hole of transverse connecting rod, and guide rod is located at the installation of the position on the upside of location hole positioning jacking nut, and guide rod is located at
The downside of location hole, which is arranged, can avoid the position limiting structure that guide rod lower end is deviate from from positioning hole.
Powder automatic feeding device in its natural state, sliding sleeve, transverse connecting rod, guide rod and belljar valve it is whole due to
Self weight, belljar valve closes the outlet of hopper, while transverse connecting rod is located at the downside of sliding slot.It, will when feeding to charging box
The outlet of blanking tube is put into the entrance of charging box, and blanking tube continues to be put into, and the entrance of charging box jacks sliding sleeve, sliding sleeve
The opposite blanking tube of cylinder moves upwards, and drives guide rod and belljar valve to rise by transverse connecting rod, belljar valve rising automatically opens material
Bucket outlet, can feed.After charging, upward chain bucket, the entrance of charging box for sliding sleeve support gradually
It is decreased to disappear, sliding sleeve declines with respect to blanking tube, and going out for hopper is automatically closed in guide rod and belljar valve decline, belljar valve
Mouthful.
Further, the sliding sleeve is hollow drum organization, toroidal cavity, cydariform knot are formed in drum organization
The toroidal cavity of the bottom surface protrusion drum organization of structure, at least one air inlet, the side of drum organization is arranged in the bottom surface of drum organization
Exhaust outlet is arranged in face or top surface, and exhaust outlet and air inlet are connected to toroidal cavity.
Specifically, eight air inlets, the side facing peripheral equipment of drum organization is angularly arranged in the lower surface of the sliding sleeve
An exhaust pipe is set, the entrance of exhaust pipe is connected to drum organization toroidal cavity, and the outlet of exhaust pipe is the exhaust outlet.
Further, top or bottommost of the transverse connecting rod in sliding slot, sliding sleeve cover entire sliding slot.
Specifically, external screw thread is arranged in the guide rod both ends, and centre is smooth surface, and guide rod middle section wears spring；It leads
Belljar valve is connected and fixed by nut to the upper end of bar, it is that guide rod lower end is worn that guide rod, which is located at the position limiting structure on the downside of location hole,
If split pin.
Further, hopper flange is arranged in the outlet of the hopper, blanking drum flange is arranged in the arrival end of blanking tube, under
The arrival end of barrel is connected with the outlet(discharge) flange of hopper.
Moreover: cross bar being set in the middle part of the hopper flange or blanking drum flange, through-hole is set in the middle part of cross bar, is led
The through-hole of cross bar is passed through to the upper end of bar.
Further, the top of the hopper connects at least three hanging rings.
Further, sieve is arranged in the hopper.
Further, the positioning tube of the outlet setting cone cell of the blanking tube, positioning tube is hollow structure.
The beneficial effects of the present invention are: powder automatic feeding device open and close do not need using additional electricity it is gentle as
Power, the unlatching of feeding device, closure cooperate charging box to realize, avoid mobile electric wire arrangement by feeding device itself completely
With the inconvenience of tracheae.The production of powder automatic feeding device is simple, and manufacturing cost is low, safely and effectively reliable；Considerably reduce charging
When throwing, spill, drip, leaking phenomenon, avoid the waste of powder.
Powder automatic feeding device feeds for fluoride salt, is able to achieve one people of craneman and completes fluoride salt charging operation, no
Ground staff is needed to climb up upper part of the electrolytic cell cooperation again, one people of craneman entirely feeds work in driver's cabin complete independently when operation
Industry eliminates ground staff and climbs up the security risk of electrolytic cell, while mitigating electrolysis flue gas to operating personnel's occupational hazards.Charging
Device selects stainless steel material production, can avoid the influence that electrolytic cell high-intensity magnetic field opens or closes positioning docking and belljar valve,
Leakage when fluoride salt being avoided to feed is emitted, is dripped, spilling, and has saved fluoride salt materials to a certain extent, while also maintaining slot top
Health.Feeding device alleviates the labor intensity of ground staff, alleviates the security risk and occupational hazards of ground staff, side
Just quick, be conducive to aluminum electrolysis.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of powder automatic feeding device embodiment of the present invention.
Fig. 2 is the structural schematic diagram of blanking drum flange in Fig. 1.
Fig. 3 is the structural schematic diagram of positioning tube in Fig. 1.
Fig. 4 is the structural schematic diagram of sliding sleeve in Fig. 1.
Components, position and number in figure: hopper 1, hopper flange 11, hanging ring 12, sieve 13, blanking tube 2, sliding slot 21,
Blanking drum flange 22, horizontal interconnecting piece 222, crescent material channel 223, positioning tube 23, guide rod 3, is determined positioning guide hole 221
Position jacking nut 31, spring 32, split pin 33, sliding sleeve 4, air inlet 41, exhaust outlet 42, toroidal cavity 43, exhaust pipe 44,
Belljar valve 5, transverse connecting rod 6.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings.
As shown in Figure 1, powder automatic feeding device of the present invention, including hopper 1, blanking tube 2, guide rod 3, sliding sleeve 4
With belljar valve 5, hopper 1 can be conical hopper or pyramid hopper, and the top of hopper 1 connects at least three hanging rings 12.Such as
Hopper 1 is welded by 8mm steel plate, and top is quadrangular shape, and the every face upper end of quadrangular is all welded with a hanging ring 12, and lower part is circle
Taper.Sieve 13 is set in hopper 1, and sieve 13 is preferably metal material, it is ensured that intensity, sieve 13 is in filter powder
Sundries.
The bottom of hopper 1 is outlet, and the outlet of hopper 1 connects blanking tube 2.The outlet of hopper 1 can be directly connected to blanking tube
2, better way is as shown in Figure 1, be welded with a circular hopper flange 11, the edge of hopper flange 11 on the downside of the outlet of hopper 1
Uniformly distributed 6 Φ 16mm through-holes, are bolted for the blanking drum flange 22 with blanking tube 2, and the circle at 11 middle part of hopper flange is logical
Hole is the outlet of hopper 1.Blanking tube 2 is made by stainless steel tube, and the entrance of blanking tube 2 is welded to connect blanking drum flange 22, under
6 uniformly distributed Φ 16mm positioning guide holes 221 are set on barrel flange 22, and with 11 flanged joint of hopper flange.Blanking drum flange
22 structure is as shown in Figure 2.The centre of blanking drum flange 22 is positioning guide hole 221, and positioning guide hole 221 is located at horizontal interconnecting piece
Among 222, for wearing guide rod 3.The 222 liang of side millings of horizontal interconnecting piece are empty and form two crescent material channels 223, crescent
Material channel 223 for material for passing through.
For the ease of by the feed opening of the discharge port of blanking tube 2 alignment charging box, the outlet setting cone cell of blanking tube 2 is determined
Position cylinder 23, positioning tube 23 are hollow structure, i.e. the lower end of blanking tube 2 is welded with the positioning tube 23 of hollow out, and positioning tube 23 is by stainless steel
It is welded.Positioning tube 23 is as shown in Figure 3.
For the side wall of blanking tube 2 along the axial setting twice sliding slot 21 of blanking tube 2, sliding slot 21 is located at the lower part of blanking tube 2 and right
Claim arrangement, i.e. line between two sliding slots 21 intersects with the center line of blanking tube 2.Transverse connecting rod is worn between two sliding slots 21
6.The outside of blanking tube 2 is arranged sliding sleeve 4, and sliding sleeve 4 can be slided up and down along blanking tube 2.Distinguish at the both ends of transverse connecting rod 6
It is fixedly connected with sliding sleeve 4, such as the both ends of transverse connecting rod 6 pass through a screw respectively and are fixedly connected with sliding sleeve 4.It is horizontal
Location hole is arranged in the middle part of connecting rod 6, and positioning hole wears guide rod 3.
Sliding sleeve 4 is hollow drum organization, and toroidal cavity 43, the bottom surface protrusion of drum organization are formed in drum organization
The toroidal cavity 43 of drum organization, as shown in Figure 1.Sliding sleeve 4 is welded by seamless steel pipe, and middle part is a stainless steel tube,
The bottom surface of drum organization is protruded in steel pipe lower part, and entirely the bottom surface of cricoid protrusion is located at feed opening when charging.Sliding sleeve 4 can phase
Blanking tube 2 is slided up and down, the height of the length of sliding stroke and sliding slot 21, i.e. sliding slot 21 is consistent.Sliding sleeve 4 and blanking tube
Clearance fit between 2, so gas vent when sliding slot 21 can be as charging, air pressure when equalizing addition in charging box.Alternatively, more
Good mode is that at least one air inlet 41 is arranged in the bottom surface of drum organization, for example, as shown in figure 4, the lower surface of sliding sleeve 4
Eight air inlets 41 are angularly set, and air inlet 41 is in lotus shape.Exhaust outlet 42, exhaust is arranged in the side of drum organization or top surface
Mouth 42 and air inlet 41 are connected to toroidal cavity 43.Exhaust outlet 42 and air inlet 41 are for exhaust when feeding, due in exhaust
There are small part powder, exhaust also has the function of indicating whether powder fills it up with charging box.Such as Fig. 1, the side of drum organization to
A piece exhaust pipe 44 of outer setting, the entrance of exhaust pipe 44 are connected to drum organization toroidal cavity 43, and the outlet of exhaust pipe 44 is institute
State exhaust outlet 42.For transverse connecting rod 6 in the top or bottommost of sliding slot 21, sliding sleeve 4 covers entire sliding slot 21.
External screw thread is arranged in 3 both ends of guide rod, and centre is smooth surface.The upper end of guide rod 3 passes through blanking drum flange 22
Positioning guide hole 221 is pierced by the outlet of hopper 1 and is fixedly connected with belljar valve 5, and belljar valve 5 is fixed on guide rod 3 by nut
Upper end.Belljar valve 5 is a plate-like valve deck put upside down, and the downside outer edge of belljar valve 5 can export close fastening with hopper 1, make
The outlet of hopper 1 opens or closes.The middle section of guide rod 3 wears spring 32.The lower end installation positioning jacking nut 31 of guide rod 3,
It is arranged after the location hole of transverse connecting rod 6 and can avoid the position limiting structure that 3 lower end of guide rod is deviate from from positioning hole.Such as it is oriented to
It is that 3 lower end of guide rod wears split pin 33 that bar 3, which is located at the position limiting structure on the downside of location hole,.Guide rod 3 passes through transverse connecting rod 6 simultaneously
Location hole, blanking drum flange 22 positioning guide hole 221 be oriented to, guarantee the firm of position.
The assemble sequence of powder automatic feeding device are as follows: first blanking tube 2 is inserted into sliding sleeve 4, sliding sleeve 4 is gone to the bottom
Two two screw holes in face are aligned with 2 twice sliding slot 21 of blanking tube, are put into transverse connecting rod 6, with screw by transverse connecting rod 6 and sliding sleeve
4 bottom surfaces of cylinder are fixed.Secondly, guide rod 3 to be inserted into the positioning guide hole 221 of blanking drum flange 22, bullet is put in 3 lower end of guide rod
Spring 32, the positioning jacking nut 31 for tightening 3 lower end of guide rod penetrate the pilot hole of transverse connecting rod 6 again, refill the split pin of lower end
33 prevent from.Again, hopper flange 11 and blanking drum flange 22 will be docked, and will screw on bolt.Finally, being loaded onto out of hopper 1
Belljar valve 5, and screw on end nut on guide rod 3.
Powder automatic feeding device in its natural state, sliding sleeve 4, transverse connecting rod 6, guide rod 3, spring 32 and bell jar
Valve 5 is whole due to self weight, and belljar valve 5 closes the outlet of hopper 1, while transverse connecting rod 6 is located at the downside or most of sliding slot 21
Lower.When feeding to charging box, the positioning tube 23 of blanking tube 2 is put into the entrance of charging box, the guarantee pair of positioning tube 23
The feed opening of quasi- charging box, blanking tube 2 continue to be put into feed opening, and the entrance of charging box jacks sliding sleeve 4,4 phase of sliding sleeve
Blanking tube 2 is moved upwards, the opposite blanking tube 2 synchronous with sliding sleeve 4 of transverse connecting rod 6 moves upwards, since positioning jacks spiral shell
The blocking of mother 31, guide rod 3 and belljar valve 5 rise, and spring 32 compresses, and the rising of belljar valve 5 automatically opens the outlet of hopper 1
It feeds.Transverse connecting rod 6 is located at 21 top of sliding slot, and the outlet of hopper 1 is opened to maximum, and blanking tube 2 and sliding sleeve 4 are opposite
It is fixed.During charging, the exhaust pipe 44 of sliding sleeve 4 is vented outwards, air pressure in equalizing addition case, while containing few in exhaust
Powder is measured, can indicate whether powder fills it up with charging box, when exhaust pipe 44 stops being vented, i.e., it is believed that powder has been filled it up with.Charging
After, the entrance of upward chain bucket 1, charging box is decreased to disappear to the support force of sliding sleeve 4, in spring 32 and sliding
Under the components Gravitative Loads such as sleeve 4, guide rod 3, belljar valve 5, sliding sleeve 4 declines with respect to blanking tube 2, guide rod 3 and bell jar
Valve 5 declines, and the outlet of hopper 1 is automatically closed in belljar valve 5.
Claims (9)
1. powder automatic feeding device, it is characterised in that: including hopper (1), blanking tube (2), guide rod (3), sliding sleeve (4)
Outlet with belljar valve (5), hopper (1) connects blanking tube (2), and the side wall of blanking tube (2) is along blanking tube (2) axially setting two
Sliding slot (21) wears transverse connecting rod (6) between two sliding slots (21), is arranged on the outside of blanking tube (2) sliding sleeve (4), slides
Sleeve (4) is hollow drum organization, forms toroidal cavity (43) in drum organization, and drum organization is protruded in the bottom surface of drum organization
Toroidal cavity (43), the bottom surface of drum organization is arranged at least one air inlet (41), the side of drum organization or top surface setting
Exhaust outlet (42), exhaust outlet (42) and air inlet (41) are connected to toroidal cavity (43), and sliding sleeve (4) can be along blanking tube
(2) it slides up and down, the both ends of transverse connecting rod (6) are fixedly connected with sliding sleeve (4) respectively, the middle part setting of transverse connecting rod (6)
Location hole, positioning hole wear guide rod (3)；
Guide rod (3) upper end passes through the outlet of hopper (1) and is fixedly mounted belljar valve (5), and belljar valve (5) is located in hopper (1)
The exit of portion's hopper (1), belljar valve (5) are a plate-like valve deck put upside down, the downside outer edge energy and hopper of belljar valve (5)
(1) outlet is close fastens；Guide rod (3) lower section passes through the location hole of transverse connecting rod (6), and guide rod (3) is located on the upside of location hole
Position installation positioning jacking nut (31), guide rod (3) be located at downside avoidable guide rod (3) lower end of setting of location hole from
The position limiting structure of positioning hole abjection.
2. powder automatic feeding device as described in claim 1, it is characterised in that: the lower surface etc. of the sliding sleeve (4)
Eight air inlets (41) are arranged in angle, and an exhaust pipe (44), the entrance of exhaust pipe (44) is arranged in the side of drum organization outward
It is connected to drum organization toroidal cavity (43), the outlet of exhaust pipe (44) is the exhaust outlet (42).
3. powder automatic feeding device as described in claim 1, it is characterised in that: the transverse connecting rod (6) is in sliding slot (21)
Top or bottommost, sliding sleeve (4) cover entire sliding slot (21).
4. powder automatic feeding device as described in claim 1, it is characterised in that: outer spiral shell is arranged in guide rod (3) both ends
Line, centre are smooth surface, and guide rod (3) middle section wears spring (32)；The upper end of guide rod (3) is connected and fixed clock by nut
Cover valve (5), it is that guide rod (3) lower end wears split pin (33) that guide rod (3), which is located at the position limiting structure on the downside of location hole,.
5. powder automatic feeding device as described in claim 1, it is characterised in that: hopper is arranged in the outlet of the hopper (1)
Blanking drum flange (22) are arranged in the arrival end of flange (11), blanking tube (2), the outlet of the arrival end and hopper (1) of blanking tube (2)
Flanged joint.
6. powder automatic feeding device as claimed in claim 5, it is characterised in that: the hopper flange (11) or blanking tube method
Cross bar is set in the middle part of blue (22), through-hole is set in the middle part of cross bar, the upper end of guide rod (3) passes through the through-hole of cross bar.
7. powder automatic feeding device as described in claim 1, it is characterised in that: the top connection of the hopper (1) is at least
Three hanging rings (12).
8. powder automatic feeding device as described in claim 1, it is characterised in that: sieve (13) are arranged in the hopper (1).
9. powder automatic feeding device as described in claim 1, it is characterised in that: cone is arranged in the outlet of the blanking tube (2)
The positioning tube (23) of shape, positioning tube (23) are hollow structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711448004.6A CN108149276B (en) | 2017-12-27 | 2017-12-27 | Powder automatic feeding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711448004.6A CN108149276B (en) | 2017-12-27 | 2017-12-27 | Powder automatic feeding device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108149276A CN108149276A (en) | 2018-06-12 |
| CN108149276B true CN108149276B (en) | 2019-07-02 |
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ID=62462540
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711448004.6A Active CN108149276B (en) | 2017-12-27 | 2017-12-27 | Powder automatic feeding device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108149276B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111926347B (en) * | 2020-07-07 | 2023-05-26 | 河南中孚铝业有限公司 | High-altitude automatic feeding device for electrolytic tank workshop |
| CN113683049B (en) * | 2021-09-08 | 2022-12-06 | 哈尔滨工程大学 | Oil filling device |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5788367A (en) * | 1995-12-13 | 1998-08-04 | Jury Alexeevich Budaev | Pneumatic vibrator |
| CN2701876Y (en) * | 2004-02-18 | 2005-05-25 | 沈阳东友仪表成套设备有限公司 | Brushless constant volume blanking device for aluminium electrolysis |
| CN2745953Y (en) * | 2004-11-03 | 2005-12-14 | 贵阳铝镁设计研究院 | Leakage proof aluminium fluoride feeding box |
| CN201433243Y (en) * | 2009-01-09 | 2010-03-31 | 王南乔 | Self-reset cylinder feeder of single-force air cylinder without control system and energy consumption |
| CN202107780U (en) * | 2010-12-24 | 2012-01-11 | 东北大学设计研究院（有限公司） | Constant-volume feeding device with installation structure |
| CN102616665B (en) * | 2011-01-27 | 2014-03-19 | 中国有色（沈阳）冶金机械有限公司 | Blanking system of aluminum electrolysis multifunctional crane |
| CN201971561U (en) * | 2011-01-27 | 2011-09-14 | 中国有色（沈阳）冶金机械有限公司 | Feeding system for aluminium electrolysis multifunction cranes |
| CN203582984U (en) * | 2013-11-29 | 2014-05-07 | 贵阳铝镁设计研究院有限公司 | Feeding device |
| CN206307753U (en) * | 2016-11-09 | 2017-07-07 | 河钢股份有限公司承德分公司 | Material automatic release device |
-
2017
- 2017-12-27 CN CN201711448004.6A patent/CN108149276B/en active Active
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| CN108149276A (en) | 2018-06-12 |
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