CN112895124A - Mortar tank for subway construction - Google Patents
Mortar tank for subway construction Download PDFInfo
- Publication number
- CN112895124A CN112895124A CN202110292925.8A CN202110292925A CN112895124A CN 112895124 A CN112895124 A CN 112895124A CN 202110292925 A CN202110292925 A CN 202110292925A CN 112895124 A CN112895124 A CN 112895124A
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- China
- Prior art keywords
- tank
- mortar
- subway construction
- jar body
- tank body
- 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.)
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Links
- 239000004570 mortar (masonry) Substances 0.000 title claims abstract description 27
- 238000010276 construction Methods 0.000 title claims abstract description 20
- 238000003756 stirring Methods 0.000 claims abstract description 34
- 239000002994 raw material Substances 0.000 claims abstract description 27
- 230000035939 shock Effects 0.000 claims abstract description 19
- 238000013016 damping Methods 0.000 claims description 19
- 230000009193 crawling Effects 0.000 claims description 7
- 238000009423 ventilation Methods 0.000 claims description 5
- 230000006978 adaptation Effects 0.000 claims description 3
- 238000010521 absorption reaction Methods 0.000 abstract description 10
- 239000000428 dust Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000010881 fly ash Substances 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000002956 ash Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 230000002026 carminative effect Effects 0.000 description 1
- 230000009194 climbing Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
- B28C5/08—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions using driven mechanical means affecting the mixing
- B28C5/0806—Details; Accessories
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
- B28C5/08—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions using driven mechanical means affecting the mixing
- B28C5/0806—Details; Accessories
- B28C5/0856—Supporting frames or structures, e.g. supporting wheels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
- B28C5/08—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions using driven mechanical means affecting the mixing
- B28C5/10—Mixing in containers not actuated to effect the mixing
- B28C5/12—Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers
- B28C5/16—Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers the stirrers having motion about a vertical or steeply inclined axis
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Mixers Of The Rotary Stirring Type (AREA)
Abstract
The invention relates to the application field of mortar tanks, in particular to a mortar tank for subway construction, which comprises a tank body, wherein the upper end of the tank body is provided with a mixing structure capable of mixing raw materials, one side of the mixing structure is provided with a feeding structure, the outer wall of the tank body is provided with an air vent structure capable of exhausting air, the lower part of the tank body is provided with a shock absorption structure capable of reducing vibration, the upper end of the shock absorption structure is provided with a supporting structure, the upper part of the supporting structure is provided with a stirring structure capable of fully stirring the raw materials, and the inner part of the tank body is provided with a movable structure capable of moving. Sundries such as leaves are filtered out to prevent the sundries from entering the tank body.
Description
Technical Field
The invention relates to the application field of mortar tanks, in particular to a mortar tank for subway construction.
Background
Subway, also known as subway, refers to an urban rail transit system mainly operated underground. It is a form of rail transportation. The right of way has the characteristics of exclusive property and no level crossing, and the right of way is also a fundamental sign that the subway is different from a light rail traffic system. The first underground railway system in the world is a 'London metropolitan area railway' which is opened in 1863 England in order to solve the problem of traffic jam of the London at that time
The mortar stirring tank can effectively replace manual on-site stirring machinery, 4-6 persons are saved, the production efficiency is greatly improved, and 1 cubic wet mortar is produced every 40 seconds on average. Through measurement and calculation, after the dry powder mortar stirring tank is used, the utilization rate of bulk cement can be improved by 8-12%, and the cement consumption can be saved by about 8%, lime, sand and the like; the utilization rate of waste residues such as fly ash and the like is improved by 2-3 percent; the energy saving rate and the ten thousand yuan GDP contribution rate are 1.21 percent, 2000 tons of fly ash are reduced, and 20 percent of construction ash falling is avoided; the emission of carbon dioxide is reduced by about 1.35 ten thousand tons.
With the rapid development of urban construction in China, huge building energy consumption becomes a huge burden for the development of economic society in China. Because the dry-mixed mortar has the outstanding advantages of water saving, energy saving, convenience, quickness, environmental protection, strong bonding force and the like, the dry-mixed mortar storage device is generally used in the field of buildings and is combined with a horizontal continuous slurry mixer to form simple production line equipment for the dry-mixed mortar, and the research on the phenomenon that the exhaust pipe of the dry-mixed mortar storage device discharges dust into the atmosphere to pollute the atmosphere is not deep at present.
At present, the mortar tank adopts a method of feeding from the upper part and stirring from the lower part, so that the problem of insufficient and uneven stirring can be caused, and therefore the mortar tank for subway construction is provided.
Disclosure of Invention
The invention aims to provide a mortar tank for subway construction, which solves the problems in the background technology.
In order to realize the above purpose, a mortar jar is used in subway construction, which comprises a tank body, the upper end of the jar body is provided with the mixed structure that can make the raw materials mix, one side of mixed structure is provided with the feeding structure, install on the outer wall of the jar body can carminative air structure, the below of the jar body is provided with the shock-absorbing structure that can reduce vibrations, shock-absorbing structure's upper end is provided with bearing structure, bearing structure's top is provided with the stirring structure that can make the raw materials intensive mixing, the inside of the jar body is provided with the movable structure that can move about.
Preferably, mixed structure includes motor casing, inverter motor, pivot and helical agitator, motor casing fixed mounting is in the upper end of the jar body, inverter motor fixed connection is in the inside of motor casing, pivot fixed mounting is in inverter motor's bottom, helical agitator fixed connection can drive the pivot through inverter motor's rotation and rotate in the below of pivot to drive helical agitator and rotate, stir the raw materials, make the mixture that the raw materials can be abundant.
Preferably, the feeding structure includes the feed inlet, filter screen and cushion rubber, feed inlet fixed connection is in one side of motor casing, filter screen fixed mounting is in the inside of feed inlet, the inside dimension looks adaptation of the size of filter screen and feed inlet, cushion rubber fills in the inner wall of the jar body, when putting in the raw materials, has had the existence of filter screen and can filter out the impurity in the raw materials such as weeds, the debris of leaf class, prevents that it from getting into the inside of the jar body, cushion rubber's existence not only can bring certain shock resistance for the jar body, certain heat preservation function in addition.
Preferably, the ventilation structure includes blow vent and dust screen, blow vent fixed mounting is on the outer wall of the jar body, dust screen fixed mounting is in the inside of blow vent, the quantity of ventilation structure is a plurality of, can get rid of jar internal portion unnecessary gas through the blow vent, prevents jar body swell, has had the dust screen existence can prevent that jar internal portion's dust from running out, contaminated air.
Preferably, shock-absorbing structure includes the shock attenuation board, fixed block and damping spring, shock attenuation board fixed connection is in the bottom of the jar body, shock-absorbing structure's quantity is two, fixed block fixed connection is on the inner wall of shock attenuation board, damping spring fixed connection is between the fixed block, the quantity of fixed block and damping spring is a plurality of, has had fixed block and damping spring's existence, can be at the vibrations that reduce jar body during operation production, guarantees that the jar body carries out stirring work steadily.
Preferably, the stirring structure includes driving motor and agitator tank, driving motor fixed connection is in the bottom of the jar body, the agitator tank rotates the front end of connecting at driving motor, can drive the agitator tank through driving motor's rotation and rotate to carry out stirring work.
Preferably, the supporting structure comprises a base, a bearing and a supporting block, the base is fixedly installed below the driving motor, the bearing is installed on two sides of the stirring box, the supporting block is fixedly connected to the bottom of the base, the supporting block is fixedly connected to the upper portion of the damping plate, and the existence of the supporting block and the base can ensure that the stirring box can work stably.
Preferably, the movable structure includes the fly leaf, sponge board and buffer spring, fly leaf swing joint is in the inside of the jar body, sponge board fixed connection is in the below of fly leaf, buffer spring fixed connection is between the sponge board, sponge board and buffer spring's quantity is a plurality of, and the shape of fly leaf is semicircular, and when jar internal raw materials reachd certain weight, can exert pressure to sponge board and buffer spring, the fly leaf will be opened, and the raw materials will flow downwards.
Preferably, fixedly connected with ladder of crawling on the outer wall of the jar body, the size of ladder of crawling is less than the size of the jar body, fixedly connected with bracing piece between the jar body and the shock-absorbing structure, the quantity of bracing piece is four, has the ladder of crawling, and the constructor just can climb to the top of the jar body.
Compared with the prior art, the invention has the beneficial effects that:
the invention uses double stirring to fully mix the raw materials, the raw materials can be more fully stirred, the rotating shaft can be driven to rotate by the rotation of the variable frequency motor, so as to drive the spiral stirrer to rotate, the raw materials can be stirred, the raw materials can be fully mixed, impurities in the raw materials, such as weeds, leaves and other impurities can be filtered out by the existence of the filter screen and prevented from entering the inner part of the tank body, the existence of the buffer rubber can not only bring certain shock resistance to the tank body, but also have certain heat preservation function, the vibration generated during the operation of the tank body can be reduced by the existence of the fixed block and the damping spring, the tank body can be ensured to stably stir, the stirring box can be driven to rotate by the rotation of the driving motor, so as to stir, the shape of the movable plate is semicircular, when the raw materials in the tank body reach certain weight, pressure is applied to the sponge plate and the buffer spring, the movable plate is opened, and the raw materials flow down.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of the internal plan structure of the can body;
FIG. 3 is an enlarged schematic view of the feed structure;
FIG. 4 is a top view of a vent structure;
FIG. 5 is a schematic view of the interior of the shock absorbing structure;
fig. 6 is an enlarged view of the agitator tank.
In the figure: 1. a tank body; 2. a hybrid structure; 3. a feed structure; 4. a venting structure; 5. a shock-absorbing structure; 6. a stirring structure; 7. a support structure; 8. a movable structure; 9. a climbing ladder; 10. a support bar; 21. a motor housing; 22. a variable frequency motor; 23. a rotating shaft; 24. a helical agitator; 31. a feed inlet; 32. a filter screen; 33. a cushion rubber; 41. a vent; 42. a dust screen; 51. a damper plate; 52. a fixed block; 53. a damping spring; 61. a drive motor; 62. a stirring box; 71. a base; 72. a bearing; 73. a support block; 81. a movable plate; 82. a sponge plate; 83. a buffer spring.
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. 1-6, a mortar tank for subway construction in the figures includes a tank body 1, a mixing structure 2 for mixing raw materials is disposed at an upper end of the tank body 1, a feeding structure 3 is disposed at one side of the mixing structure 2, an air vent structure 4 for exhausting air is mounted on an outer wall of the tank body 1, a shock-absorbing structure 5 for reducing vibration is disposed below the tank body 1, a supporting structure 7 is disposed at an upper end of the shock-absorbing structure 5, a stirring structure 6 for sufficiently stirring raw materials is disposed above the supporting structure 7, and a movable structure 8 is disposed in the tank body 1.
Mixing structure 2 includes motor casing 21, inverter motor 22, pivot 23 and helical agitator 24, motor casing 21 fixed mounting is in the upper end of the jar body 1, inverter motor 22 fixed connection is in the inside of motor casing 21, 23 fixed mounting of pivot is in inverter motor 22's bottom, 24 fixed connection of helical agitator is in the below of pivot 23, feeding structure 3 includes feed inlet 31, filter screen 32 and cushion rubber 33, feed inlet 31 fixed connection is in one side of motor casing 21, filter screen 32 fixed mounting is in the inside of feed inlet 31, the inside size of filter screen 32 and the inside size looks adaptation of feed inlet 31, cushion rubber 33 fills in the inner wall of the jar body 1, ventilation structure 4 includes blow vent 41 and dust screen 42, blow vent 41 fixed mounting is on the outer wall of the jar body 1, dust screen 42 fixed mounting is in the inside of blow vent 41, the number of the ventilation structures 4 is a plurality of, the shock absorption structure 5 comprises a shock absorption plate 51, two fixed blocks 52 and shock absorption springs 53, the shock absorption plate 51 is fixedly connected to the bottom of the tank body 1, the number of the shock absorption structures 5 is two, the fixed blocks 52 are fixedly connected to the inner wall of the shock absorption plate 51, the shock absorption springs 53 are fixedly connected between the fixed blocks 52, and the fixed blocks 52 and the shock absorption springs 53 are a plurality.
The variable frequency motor 22 is a commonly used element in engineering construction, and the outer part of the motor casing 21 is connected with a lead, so that the variable frequency motor 22 can rotate when a power supply is switched on.
The stirring structure 6 comprises a driving motor 61 and a stirring box 62, the driving motor 61 is fixedly connected to the bottom of the tank body 1, the stirring box 62 is rotatably connected to the front end of the driving motor 61, the supporting structure 7 comprises a base 71, a bearing 72 and supporting blocks 73, the base 71 is fixedly installed below the driving motor 61, the bearings 72 are installed at two sides of the stirring box 62, the supporting blocks 73 are fixedly connected to the bottom of the base 71, the supporting blocks 73 are fixedly connected to the upper side of the damping plate 51, the movable structure 8 comprises a movable plate 81, a sponge plate 82 and a damping spring 83, the movable plate 81 is movably connected to the inside of the tank body 1, the sponge plate 82 is fixedly connected to the lower side of the movable plate 81, the damping spring 83 is fixedly connected between the sponge plates 82, the number of the sponge plate 82 and the damping spring 83 is several, and the crawling ladder 9 is fixedly connected to the outer wall of the tank body, the size of the crawling ladder 9 is smaller than that of the tank body 1, the supporting rods 10 are fixedly connected between the tank body 1 and the damping structure 5, and the number of the supporting rods 10 is four.
The stirring box 62 is rotatably connected with the bearing 72, and the stirring box 62 and the bearing 72 do not rotate oppositely because the rotation directions are different.
In the scheme: the user is when using, at first pour into the raw materials into to feed inlet 31, start inverter motor 22 simultaneously, make it drive helical agitator 24 and rotate, stir the raw materials, when waiting to the raw materials stirring to a certain extent, the raw materials will be to exerting pressure downwards, thereby fly leaf 81 will compress downwards, buffer spring 83, the raw materials will flow in agitator tank 62, start driving motor 61, just can drive agitator tank 62 and rotate, make the raw materials intensive mixing, at jar body 1 during operation, can produce vibrations, fixed block 52 and damping spring 53's existence has, can reduce vibrations, make the stable work of jar body 1.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are 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.
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 mortar jar is used in subway construction, includes jar body (1), its characterized in that: the upper end of the tank body (1) is provided with a mixing structure (2) which can mix raw materials, one side of the mixing structure (2) is provided with a feeding structure (3), an air ventilation structure (4) which can exhaust is installed on the outer wall of the tank body (1), a damping structure (5) which can reduce vibration is arranged below the tank body (1), the upper end of the damping structure (5) is provided with a supporting structure (7), a stirring structure (6) which can fully stir raw materials is arranged above the supporting structure (7), and a movable structure (8) which can move is arranged inside the tank body (1).
2. The mortar tank for subway construction according to claim 1, wherein: mixing structure (2) includes motor casing (21), inverter motor (22), pivot (23) and helical agitator (24), motor casing (21) fixed mounting is in the upper end of the jar body (1), inverter motor (22) fixed connection is in the inside of motor casing (21), pivot (23) fixed mounting is in the bottom of inverter motor (22), helical agitator (24) fixed connection is in the below of pivot (23).
3. The mortar tank for subway construction according to claim 1, wherein: feeding structure (3) include feed inlet (31), filter screen (32) and cushion rubber (33), feed inlet (31) fixed connection is in one side of motor casing (21), filter screen (32) fixed mounting is in the inside of feed inlet (31), the inside size looks adaptation of the size of filter screen (32) and feed inlet (31), cushion rubber (33) are filled in the inner wall of the jar body (1).
4. The mortar tank for subway construction according to claim 1, wherein: the ventilating structure (4) comprises a ventilating opening (41) and a dustproof net (42), wherein the ventilating opening (41) is fixedly installed on the outer wall of the tank body (1), the dustproof net (42) is fixedly installed inside the ventilating opening (41), and the number of the ventilating structure (4) is a plurality.
5. The mortar tank for subway construction according to claim 1, wherein: shock-absorbing structure (5) are including shock attenuation board (51), fixed block (52) and damping spring (53), shock attenuation board (51) fixed connection is in the bottom of jar body (1), the quantity of shock-absorbing structure (5) is two, fixed block (52) fixed connection is on the inner wall of shock attenuation board (51), damping spring (53) fixed connection is between fixed block (52), the quantity of fixed block (52) and damping spring (53) is a plurality of.
6. The mortar tank for subway construction according to claim 1, wherein: stirring structure (6) include driving motor (61) and agitator tank (62), driving motor (61) fixed connection is in the bottom of the jar body (1), agitator tank (62) rotate the front end of connecting at driving motor (61).
7. The mortar tank for subway construction according to claim 1, wherein: the supporting structure (7) comprises a base (71), bearings (72) and supporting blocks (73), wherein the base (71) is fixedly installed below the driving motor (61), the bearings (72) are installed on two sides of the stirring box (62), the supporting blocks (73) are fixedly connected to the bottom of the base (71), and the supporting blocks (73) are fixedly connected to the upper portion of the damping plate (51).
8. The mortar tank for subway construction according to claim 1, wherein: the movable structure (8) comprises a movable plate (81), a sponge plate (82) and a buffer spring (83), the movable plate (81) is movably connected inside the tank body (1), the sponge plate (82) is fixedly connected below the movable plate (81), the buffer spring (83) is fixedly connected between the sponge plate (82), and the sponge plate (82) and the buffer spring (83) are a plurality of in number.
9. The mortar tank for subway construction according to claim 1, wherein: fixedly connected with ladder (9) of crawling on the outer wall of the jar body (1), the size of ladder (9) of crawling is less than the size of the jar body (1), fixedly connected with bracing piece (10) between the jar body (1) and shock-absorbing structure (5), the quantity of bracing piece (10) is four.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110292925.8A CN112895124A (en) | 2021-03-18 | 2021-03-18 | Mortar tank for subway construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110292925.8A CN112895124A (en) | 2021-03-18 | 2021-03-18 | Mortar tank for subway construction |
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| Publication Number | Publication Date |
|---|---|
| CN112895124A true CN112895124A (en) | 2021-06-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110292925.8A Pending CN112895124A (en) | 2021-03-18 | 2021-03-18 | Mortar tank for subway construction |
Country Status (1)
| Country | Link |
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| CN (1) | CN112895124A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114683403A (en) * | 2022-04-08 | 2022-07-01 | 重庆国浩永固新型建材有限公司 | Stirring system and stirring method of stirring station |
| CN115027830A (en) * | 2022-06-16 | 2022-09-09 | 遂宁鸿发建材有限责任公司 | Recyclable dry powder mortar storage device |
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| CN114683403A (en) * | 2022-04-08 | 2022-07-01 | 重庆国浩永固新型建材有限公司 | Stirring system and stirring method of stirring station |
| CN114683403B (en) * | 2022-04-08 | 2023-08-18 | 重庆国浩永固新型建材有限公司 | Stirring system and stirring method of stirring station |
| CN115027830A (en) * | 2022-06-16 | 2022-09-09 | 遂宁鸿发建材有限责任公司 | Recyclable dry powder mortar storage device |
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Application publication date: 20210604 |
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