CN211104828U - Dry-mixed light gypsum mortar mixing production line - Google Patents

Dry-mixed light gypsum mortar mixing production line Download PDF

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Publication number
CN211104828U
CN211104828U CN201921795259.4U CN201921795259U CN211104828U CN 211104828 U CN211104828 U CN 211104828U CN 201921795259 U CN201921795259 U CN 201921795259U CN 211104828 U CN211104828 U CN 211104828U
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gypsum
bin
module
mixing
dry
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秦珑坤
郑富生
秦万松
秦艳青
张春芬
丁明辉
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Zhengzhou Zhongding Precision Machinery Co Ltd
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Zhengzhou Zhongding Precision Machinery Co Ltd
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Abstract

A dry-mixed light gypsum mortar mixing production line, which is used for preparing dry-mixed light gypsum mortar mixing materials in large batch. The device comprises a gypsum sand material mixing and batching module, a perlite batching module and a first mixing module; the first mixing module comprises a horizontal drum mixer; gypsum sand material compounding batching module with the cooperation of pearlite batching module to respectively to gypsum sand material compounding, pearlite are joined in marriage to equal proportion in the horizontal cylinder compounding machine. Gypsum sand material compounding mixes in horizontal cylinder blendor with pearlite, and first horizontal cylinder blendor is little to the complete degree damage of pearlite, and second gypsum, sand material, pearlite mix comparatively evenly.

Description

Dry-mixed light gypsum mortar mixing production line
Technical Field
The utility model relates to a mortar production facility technical field, concretely relates to dry-mixed light gypsum mortar production line.
Background
The light gypsum mortar belongs to a subdivision subclass of gypsum mortar and is mainly used for manufacturing a heat-insulating layer of a building. The raw materials of the light gypsum mortar comprise gypsum powder, sand, perlite and other materials which are proportioned according to a proper proportion and uniformly mixed to form a dry-mixed light gypsum mortar mixed material, and when the light gypsum mortar mixed material is used, the dry-mixed light gypsum mortar mixed material is mixed with water and uniformly stirred to form the light gypsum mortar.
Chinese patent document CN204235716U, published in 4/1/2015, describes a dry-mixed gypsum mortar production line, which includes a first powder bin, a second powder bin and an additive device, wherein a hoisting machine is disposed on one side of the second powder bin, and the upper end of the hoisting machine is connected to and communicated with the upper end of the second powder bin; the additive device is arranged between the first powder bin and the second powder bin, a first discharge hole is formed in the lower end of the first powder bin, a first spiral conveyer is arranged below the first discharge hole, a second discharge hole is formed in the lower end of the second powder bin, a second spiral conveyer is arranged below the second discharge hole, a plurality of second weighing devices are connected below the additive device, and the output ends of the first spiral conveyer and the second spiral conveyer are respectively communicated with the second weighing devices in corresponding positions; the lower extreme discharge gate of every second weighing ware all communicates with the mixer, and the lower extreme of mixer is connected with the stirring transition storehouse, and the discharge gate of stirring transition storehouse lower extreme is equipped with bag packaging machine.
Because the raw materials of the dry-mixed gypsum mortar do not comprise perlite, and the perlite is light and fragile, the technical scheme is not suitable for producing the dry-mixed light gypsum mortar mixed material.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is how to prepare in batches and do mix light gypsum mortar compounding, for this reason, the utility model provides a do mix light gypsum mortar compounding production line.
In order to solve the technical problem, the utility model adopts the following technical scheme:
designing a dry-mixing light gypsum mortar mixing production line, which comprises a gypsum sand mixing and batching module, a perlite mixing module and a first mixing module; the first mixing module comprises a horizontal drum mixer; gypsum sand material compounding batching module with the cooperation of pearlite batching module to respectively to gypsum sand material compounding, pearlite are joined in marriage to equal proportion in the horizontal cylinder compounding machine.
Preferably, the perlite batching module comprises a volume scale.
Preferably, the gypsum sand material mixing module comprises a gypsum powder container, an additive container, a mixer and a weighing module, wherein the mixer is arranged on the weighing module, and the gypsum powder container and the additive container are communicated with a feed inlet hose of the mixer.
Further, first mixing module still includes granule material lifting machine and material transfer bin, the discharge gate of gypsum sand material batching module with the feed inlet hose intercommunication of granule material lifting machine, the discharge gate of perlite batching module with the feed inlet pipeline intercommunication of granule material lifting machine, the discharge gate of granule material lifting machine with the feed inlet pipeline intercommunication in material transfer bin, the discharge gate in material transfer bin with the feed inlet pipeline intercommunication of horizontal cylinder blendor.
Still further, the particle material lifter is a bucket lifter.
Furthermore, the gesso container has at least two, the discharge gate of gesso container pass through screw conveyer with the feed inlet of blendor links up mutually.
Furthermore, the material adding container comprises a feeding bin and a weighing bin, the feeding bin is communicated with the weighing bin through a hose, and the weighing bin is communicated with a feed inlet through a hose of the mixer.
Preferably, the first mixing module further comprises a finished product transferring bin, a buffer is arranged in the finished product transferring bin, a discharge port of the horizontal drum mixer is communicated with a feed port of the finished product transferring bin in a sealing manner, and dry-mixed light gypsum mortar mixed materials discharged from the discharge port of the horizontal drum mixer fall on the buffer and then slide into the finished product transferring bin in an inclined manner.
The utility model discloses a main beneficial technological effect includes:
(1) mixing the gypsum sand material and perlite in a horizontal roller mixer, wherein the horizontal roller mixer has little damage to the integrity of the perlite; secondly, gypsum, sand material and perlite are mixed more evenly.
(2) The perlite has inconsistent density, and a volume scale is adopted to obtain better proportioning ratio.
(3) Since the gypsum phase is greatly influenced by the firing process conditions and storage conditions, the mixing of at least two gypsum powder containers contributes to the consistency of the continuous dry-mixed gypsum mortar mixing.
(4) The buffer can prevent the ingredients of the heavier gypsum sand material from falling deeper and extruding and lifting the ingredients of the perlite due to momentum impact when the mixed material of the dry-mixed light gypsum mortar (namely the finished material) falls into the finished material transfer bin, so that the mixed material of the dry-mixed light gypsum mortar is separated.
Drawings
Fig. 1 is the structure schematic diagram of the utility model relates to a dry-mixed light gypsum mortar mixing production line.
In the figure, 11-a first gypsum powder container, 12-a first screw conveyor, 21-a second gypsum powder container, 31-a translatable hanging basket, 32-a feeding bin, 33-a temporary storage bin, 34-a third screw conveyor, 35-a weighing bin, 41-a mixer, 42-a fourth screw conveyor, 50-a second bucket elevator, 51-a transfer hopper, 52-a volume scale, 61-a particle elevator, 62-a material transfer bin, 63-a horizontal roller mixer, 64-a finished material transfer bin, 65-a bag type packaging machine, 66-a conveyor and 67-a tying machine.
FIG. 2 is one of the strong electricity circuit diagrams of the dry mixing light gypsum mortar mixing production line of the present invention.
Fig. 3 is a second strong electric circuit diagram of the dry-mixed light gypsum mortar mixing production line of the present invention.
Fig. 4 is one of the control circuit diagrams of the dry-mixed light gypsum mortar mixing production line of the present invention.
Fig. 5 is a second control circuit diagram of the dry-mixed light gypsum mortar mixing production line of the present invention.
Fig. 6 is a third control circuit diagram of the dry-mixed light gypsum mortar mixing production line of the present invention.
Fig. 7 is a fourth control circuit diagram of the dry-mixed light gypsum mortar mixing production line of the present invention.
Fig. 8 is a fifth control circuit diagram of the dry-mixed light gypsum mortar mixing production line of the present invention.
Fig. 9 is six of a control circuit diagram of the dry-mixed light gypsum mortar mixing production line of the present invention.
Detailed Description
The following embodiments are only intended to illustrate the present invention in detail, and do not limit the scope of the present invention in any way.
Technical terms in the present invention are defined as follows.
The hose communication means that the pipeline contains a hose section to avoid the influence of the hard pipe communication on weighing and metering.
Example 1: a dry-mixed light gypsum mortar mixing production line is shown in figure 1 and comprises a gypsum sand mixing batching module, a perlite batching module and a first mixing module; the first mixing module comprises a horizontal drum mixer 63; the gypsum sand material mixing and batching module is matched with the perlite batching module to respectively mix gypsum sand material mixing and perlite in equal proportion into the horizontal drum mixer 63.
Preferably, the perlite batching module includes a volume scale 52. The volume scale 52 measures the volume of the material. One implementation is: the volume scale comprises a funnel, a blanking valve is arranged at the bottom of the funnel, and a horizontally moving residual material scraper is arranged at the top of the funnel so as to scrape out perlite which is higher than the top wall of the funnel, so that the volume of the perlite which is filled in each funnel is determined. Yet another implementation is: the volume scale includes the funnel, install the unloading valve in the bottom of funnel, install high charge level indicator in the funnel, low charge level indicator, the volume of funnel between corresponding to high charge level indicator and low charge level indicator is definite, when using at every turn, when the material in the funnel reaches high charge level line of high charge level indicator measuring, stop to the material of packing into in the volume scale 52, open the unloading valve, when the material in the funnel reaches low charge level line of low charge level indicator, close the unloading valve, like this, the material volume of once discharging is exactly definite. During specific implementation, the height difference between the high material level line and the low material level line can be measured in an alternative mode.
Preferably, the gypsum sand material mixing module comprises a gypsum powder container, an additive container, a mixer 41 and a weighing module, wherein the mixer 41 is arranged on the weighing module, and the gypsum powder container and the additive container are communicated with a feed inlet hose of the mixer 41. The mixer 41 may have a plurality of feed inlets, or one feed inlet may be matched with a pipe joint having a multi-pass function to form a plurality of ports. Generally, the mixer 41 is mounted on the weighing module through a fixing frame, when the mixer 41 does not work, the weighing module measures the static weight of the mixer 41 and the materials therein, and when the mixer 41 works, the mixer 41 and the materials therein cannot be measured through the weighing module, because the vibration of the mixer 41 during the work affects the measurement accuracy of the weighing module.
Preferably, there are at least two gypsum powder containers, and the discharge port of each gypsum powder container is preferably connected to the feed port of the mixer 41 by a screw conveyor. In this embodiment, there are two gypsum powder containers, which are the first gypsum powder container 11 and the second gypsum powder container 21, respectively, the bottom discharge port of the first gypsum powder container 11 is communicated with the feed port pipeline of the first screw conveyor 12, and the discharge port of the first screw conveyor 12 is communicated with the feed port hose of the mixer 41. The bottom discharge port of the second gypsum powder container 21 is communicated with a feed port pipeline of a second screw conveyor (not shown), and the discharge port of the second screw conveyor is communicated with a feed port hose of the mixer 41.
In this embodiment, first mixing module still includes granule material lifting machine 61 and material transfer bin 62, the discharge gate of gypsum sand material batching module and the feed inlet hose intercommunication of granule material lifting machine 61, the discharge gate of perlite batching module and the feed inlet pipeline intercommunication of granule material lifting machine 61, the discharge gate of granule material lifting machine 61 and the feed inlet pipeline intercommunication of material transfer bin 62, the discharge gate of material transfer bin 62 and the feed inlet pipeline intercommunication of horizontal cylinder blendor 63. Because gypsum sand material compounding batching module is on-the-spot compounding batching, so, horizontal cylinder blendor compounding speed is faster than the batching speed of gypsum sand material compounding batching module, through increasing material transfer bin 62, can increase in the gypsum sand material compounding batching module blendor and with the group number of the weighing module that pairs to improve batching efficiency. Still further, the granule elevator is a bucket elevator. Wherein, the bottom discharge port of the mixer 41 is further connected with a fourth screw conveyor 42, and the discharge port of the fourth screw conveyor 42 is connected with the feed inlet hose of the granule elevator 61.
In this embodiment, the feeding container includes a feeding bin 32 and a weighing bin 35, the feeding bin 32 is in hose communication with the weighing bin 35, and the weighing bin 35 is in hose communication with a feeding port of the mixer 41. The cavity of the batch charging bin 32 is formed by the inner cavity of the auxiliary material premixer. The feeding container further comprises a temporary storage bin 33, the discharge hole of the temporary storage bin 33 is communicated with the feed inlet pipeline of the third screw conveyor 34, and the discharge hole of the third screw conveyor 34 is communicated with the feed inlet hose of the weighing bin 35. Because the feeding premixer is higher in installation, the feeding container also comprises a translational hanging basket 31, and the translational hanging basket 31 is used for lifting and translating the auxiliary materials to the position above the feeding port of the auxiliary material premixer.
Preferably, the first mixing module further comprises a finished product material transfer bin 64, a buffer (not shown) is arranged in the finished product material transfer bin 64, the discharge port of the horizontal drum mixer 63 is in sealed communication with the feed port of the finished product material transfer bin 64, and the dry-mixed light gypsum mortar mixed material discharged from the discharge port of the horizontal drum mixer 63 falls on the buffer 642 and then obliquely slides into the finished product material transfer bin 64, so that the dry-mixed light gypsum mortar mixed material in the finished product material transfer bin 64 is prevented from being impacted when the dry-mixed light gypsum mortar mixed material directly falls on the dry-mixed light gypsum mortar mixed material in the finished product material transfer bin 64, and separation and layering are formed on the dry-mixed light gypsum mortar mixed material.
The upper surface of the buffer can be a plane type inclined surface or an arc type inclined surface, and is preferably an arc type inclined surface which is gradually lowered from the center to the periphery. Multiple buffers may be provided at different heights within the finished material transfer bin 64.
When in use, the first gypsum powder container 11 and the second gypsum powder container 12 are filled with gypsum powder. And (3) hoisting various auxiliary materials into the auxiliary material premixing machine according to the proportion by using the translational hanging basket, starting the auxiliary material premixing machine to premix and stir the auxiliary materials, and completely transferring the auxiliary materials into the temporary storage bin 33 after the premixing and stirring of the auxiliary materials are finished. When the ingredients are needed, before the ingredients are added and the mixer 41 is in a static state, the weight measured by the weighing module is M1; the weight of the gypsum powder required to be added in the mixer 41 is M2; the first screw conveyer 12 and the second screw conveyer synchronously input gypsum powder into the mixer 41, the weight measured by the weighing module in real time is M3, and when M3 is M1 + M2, the first screw conveyer 12 and the second screw conveyer stop conveying materials simultaneously. Synchronously or asynchronously, the third screw conveyor 34 conveys the auxiliary material mixture in the temporary storage bin 33 into the weighing bin 35. When the weighing bin 35 is empty, the weight is M4, the gypsum powder of M2 weight needs the auxiliary material compounding of M5 weight, and when the weighing bin weight M6 measured in real time by the weighing module of the weighing bin is M4 + M5, the third screw conveyor 34 stops conveying. The auxiliary material mixture in the weighing bin 35 is transferred into a mixer 41. After the gypsum powder with the weight of M2 and the auxiliary material with the weight of M5 are mixed in the mixer 41, the weighing module can be closed, the mixer 41 is started, and the mixer 41 uniformly mixes the gypsum powder and the auxiliary material to form a gypsum sand material mixed material.
The perlite is transferred into the transfer hopper 51 above. The perlite in the transfer hopper 51 is transferred into the volume scale 52, and when the height of the perlite in the volume scale 52 reaches a high material level line, the perlite in the transfer hopper 51 is temporarily transferred into the volume scale 52. After that, the perlite in the volume scale 52 is transferred to the feeding hole of the particle material elevator 61 and transferred to the material transfer bin 62 by the elevator 61, when the perlite in the volume scale 52 is completely transferred or the height of the perlite reaches a low material level line, the discharging hole of the volume scale 52 is cut off, and the volume of the prepared perlite is determined. And synchronously or asynchronously, the fourth screw conveyer 42 and the particle material elevator 61 are started, and the gypsum sand material mixing material in the mixer is completely transferred into the material transfer bin 62 through the fourth screw conveyer 42 and the particle material elevator 61. Thus, the preparation of the gypsum sand material mixing material is not influenced.
Then, the gypsum sand material mixed material and the perlite in the material transfer bin 62 are all transferred into a horizontal drum mixer 63, the horizontal drum mixer 63 works to uniformly mix the gypsum sand material mixed material and the perlite to form a dry-mixed light gypsum mortar mixed material (i.e. a finished material), and all the gypsum sand material mixed material and the perlite are transferred into a finished material transfer bin 64. During the transfer process, the finished product falls onto the buffer first to avoid the finished product falling directly onto the finished product in the finished product transfer bin 64 to cause segregation and stratification of the finished product. The finished product in the finished product transfer bin 64 can be packed and bagged by a bag packing machine 65, and then transferred to another place by a conveyor 66 after being tied by a tying machine 67, as required.
Generally, it is preferable to use a hard pipe connection for the piping connection not specifically described. According to the blanking requirement in the using process, a valve is arranged at a proper position of the channel.
When the present invention adopts an automatic control, the following installation method can be selected as the combination method of the electrical components and the mechanical components in the present embodiment.
Referring to fig. 1, in fig. 2-9, motor M1 is used to drive the power input shaft of the premix mill 32 to rotate. The motor M2 is used for driving the power input shaft of the mixer 41 to rotate. The motor M3 is used to drive the power input shaft of the fourth screw conveyor 42 to rotate. The motor M4 is used for driving the power input shaft of the second bucket elevator 50 to rotate, and the discharge port of the second bucket elevator 50 is communicated with the feed port of the transfer hopper 51 through a pipeline so as to transfer perlite into the transfer hopper 51 through the second bucket elevator 50. The motor M5 is used to drive the power input shaft of the third screw conveyor 34 to rotate. The motor M6 is used for driving a first air seal device, and two ends of the first air seal device are respectively communicated with the discharge hole of the material transfer bin 62 and the feed inlet pipeline of the horizontal drum mixer 63. The motor M7 is used for driving a second air seal machine, and two ends of the second air seal machine are respectively communicated with a discharge hole of the finished product material transfer bin 64 and a feed inlet pipeline of the bag type packaging machine 65. The motor M8 is used for driving the power input shaft of the particle material hoister 61 to rotate. The motor M9 is used to drive the power input shaft of the first screw conveyor 12 to rotate. The motor M10 is used for driving the power input shaft of the second screw conveyer to rotate, the feed inlet of the second screw conveyer is communicated with the discharge outlet pipeline of the second gypsum powder container 21, and the discharge outlet of the second screw conveyer is communicated with the feed inlet hose of the mixer 41. The motor M11 is used for driving the power input shaft of the dust remover to rotate. The motor M12 is used for driving the power input shaft of the horizontal drum mixer 63 to rotate.
The electric control valve YV1 is installed at the discharge port of the charging bin 32, namely the discharge port of the auxiliary material pre-mixer. An electric control valve YV2 is arranged at the discharge port of the weighing bin. The electric control valve YV3 is installed at the discharge outlet of the transfer hopper 51, the electric control valve YV4 is installed at the discharge outlet of the volume scale 52, and the discharge outlet of the volume scale 52 is communicated with the feed inlet pipeline of the granular material elevator 61 through a sliding pipe. The electric control valve YV5 is installed at the discharge outlet of the particle material lifter 61, and the electric control valve YV6 is installed at the discharge outlet of the second bucket lifter 50.
The level indicator G1RB is installed in the first gypsum powder container 11 and is used for acquiring whether the material in the first gypsum powder container 11 reaches a high level line or not, and when the level indicator G1RB outputs a signal, the material in the first gypsum powder container 11 reaches the high level line. The level indicator D1RB is installed in the first gypsum powder container 11 and is used for acquiring whether the material in the first gypsum powder container 11 reaches a low level line or not, and when the level indicator D1RB outputs a signal, the material in the first gypsum powder container 11 reaches the low level line. The level gauge G2RB is installed in the temporary storage bin 33 for acquiring whether the material in the temporary storage bin 33 reaches a high level line, and when the level gauge G2RB outputs a signal, the material in the temporary storage bin 33 reaches the high level line. The level gauge D2RB is installed in the temporary storage bin 33 for acquiring whether the material in the temporary storage bin 33 reaches a low level line, and when the level gauge D2RB outputs a signal, the material in the temporary storage bin 33 reaches the low level line. The level meter G3RB is installed in the finished product material transfer bin 64 and is used for acquiring whether the material in the finished product material transfer bin 64 reaches a high level line or not, and when the level meter G3RB outputs a signal, the material in the finished product material transfer bin 64 reaches the high level line. The level indicator D3RB is installed in the finished product material transfer bin 64 and is used for acquiring whether the material in the finished product material transfer bin 64 reaches a low level line or not, and when the level indicator D3RB outputs a signal, the material in the finished product material transfer bin 64 reaches the low level line. A level gauge G4RB is mounted within volume scale 52 for obtaining whether the material within volume scale 52 reaches a high level line, and when level gauge G4RB outputs a signal, the material within volume scale 52 reaches a high level line. A level gauge D4RB is mounted within volume scale 52 for obtaining whether the material within volume scale 52 reaches a low level line, and when level gauge D4RB outputs a signal, the material within volume scale 52 reaches a low level line. The charge level indicator G5RB is installed in the material transfer bin 62 and is used for obtaining whether the material in the material transfer bin 62 reaches a high charge level line or not, when the charge level indicator G5RB outputs a signal, the material in the material transfer bin 62 reaches a high charge level line, the charge level indicator D5RB is installed in the material transfer bin 62 and is used for obtaining whether the material in the material transfer bin 62 reaches a low charge level line or not, and when the charge level indicator D5RB outputs a signal, the material in the material transfer bin 62 reaches a low charge level line.
In fig. 6, the measured current between a1 and a2 is the output signal output by the weigh module that is linearly related to the weight, and the measured current between A3 and a4 is the output signal output by the weigh module of the weigh bin that is linearly related to the weight.
The present invention has been described in detail with reference to the accompanying drawings and embodiments, but those skilled in the art will understand that various specific parameters in the above embodiments can be changed without departing from the spirit of the present invention to form a plurality of specific embodiments, which are the common variation ranges of the present invention and will not be described in detail herein.

Claims (8)

1. A dry-mixed light gypsum mortar mixing production line comprises a perlite batching module, and is characterized by further comprising a gypsum sand material mixing batching module and a first mixing module; the first mixing module comprises a horizontal drum mixer; gypsum sand material compounding batching module with the cooperation of pearlite batching module to respectively to gypsum sand material compounding, pearlite are joined in marriage to equal proportion in the horizontal cylinder compounding machine.
2. The dry mix light gypsum mortar mixing line of claim 1, wherein the perlite batching module includes a volume scale.
3. The dry-mix light gypsum mortar mixing production line of claim 1, wherein the gypsum sand material mixing batching module comprises a gypsum powder container, an additive material container, a mixer and a weighing module, the mixer is mounted on the weighing module, and the gypsum powder container and the additive material container are both communicated with a feed inlet hose of the mixer.
4. The dry-mixed light weight gypsum mortar mixing production line of claim 3, wherein the first mixing module further comprises a granule elevator and a material transfer bin, the discharge port of the gypsum sand mixing module is communicated with the feed inlet hose of the granule elevator, the discharge port of the perlite mixing module is communicated with the feed inlet pipe of the granule elevator, the discharge port of the granule elevator is communicated with the feed inlet pipe of the material transfer bin, and the discharge port of the material transfer bin is communicated with the feed inlet pipe of the horizontal drum mixer.
5. The dry mix lightweight gypsum mortar compounding line of claim 4, wherein the particulate material elevator is selected from a bucket elevator.
6. The dry-mixed lightweight gypsum mortar mixing production line according to claim 3, wherein the number of the gypsum powder containers is at least two, and the discharge ports of the gypsum powder containers are connected with the feed port of the mixer through a screw conveyor.
7. The dry-mixed light gypsum mortar mixing production line of claim 3, wherein the feeding container comprises a feeding bin and a weighing bin, the feeding bin is communicated with the weighing bin hose, and the weighing bin is communicated with a feed inlet hose of the mixer.
8. The dry-mixed light gypsum mortar mixing production line of claim 1, wherein the first mixing module further comprises a finished material transfer bin, a buffer is arranged in the finished material transfer bin, a discharge port of the horizontal drum mixer is in sealed communication with a feed port of the finished material transfer bin, and the dry-mixed light gypsum mortar mixing material discharged from the discharge port of the horizontal drum mixer falls on the buffer and then slides into the finished material transfer bin in an inclined manner.
CN201921795259.4U 2019-10-24 2019-10-24 Dry-mixed light gypsum mortar mixing production line Active CN211104828U (en)

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Application Number Priority Date Filing Date Title
CN201921795259.4U CN211104828U (en) 2019-10-24 2019-10-24 Dry-mixed light gypsum mortar mixing production line

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Application Number Priority Date Filing Date Title
CN201921795259.4U CN211104828U (en) 2019-10-24 2019-10-24 Dry-mixed light gypsum mortar mixing production line

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CN211104828U true CN211104828U (en) 2020-07-28

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