An environmentally friendly mortar production line with continuous forced mixing

The environmentally friendly mortar production line with continuous forced stirring solves the problem of motor overload in the processing of gypsum mortar raw materials, achieves safe and efficient crushing and mixing, and ensures the stable operation and efficient processing of the production line.

CN115476437BActive Publication Date: 2025-10-03HUBEI HANJIANG NEW BUILDING MATERIALS CO LTD
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Patent Information

Application Number
CN202211324280.2
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2022-10-27
Publication Date
2025-10-03
Estimated Expiration
2042-10-27

AI Technical Summary

Technical Problem

In the prior art, when processing gypsum mortar raw materials, the volume is too large, causing the motor to overload, heat and damage, interrupt the production process, and the processing efficiency is low, making it difficult to ensure the safety of the motor and the processing environment.

Method used

The environmentally friendly mortar production line adopts continuous forced mixing, including a raw material bin, a disintegrating device, a hammer dryer and a mixing blade. The crushing wheel and the mixing blade are driven by a driving device, and the cam and the vibration groove are used to avoid blockage of large pieces of raw materials, thus realizing the integrated processing of crushing and mixing.

Benefits of technology

It effectively avoids motor overload, ensures the safety and efficiency of production line operation, ensures complete mixing and stable transmission of materials, and improves processing efficiency.

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Abstract

The present invention discloses an environmentally friendly mortar production line with continuous forced stirring, which specifically relates to the field of gypsum processing technology, including a raw material bin, wherein the number of the raw material bins is two, and a belt scale is provided below each of the two raw material bins, the raw material bin is connected to a scattering device via a first conveyor belt device, and the scattering device is connected to an impeller feeder via a second conveyor belt device, and the lower surface of the impeller feeder is provided with a sealing shell, and a hammer dryer is provided in the sealing shell. The present invention avoids the situation in which the driving motor is overloaded during operation due to the jamming of the crushing wheel and the bulk of the raw material by providing a driving device, a vibration groove, a pulley and a transmission blade, and avoids the situation in which the driving motor is damaged by overheating due to the load operation of the driving motor, thereby ensuring the processing efficiency of the raw materials by the production line, and at the same time protecting the production environment and the operation safety of the production line.
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Description

Technical Field

[0001] The present invention relates to the technical field of gypsum processing, and more particularly to an environmentally friendly mortar production line with continuous forced stirring. Background Art

[0002] Gypsum mortar is a new type of wall plastering material. It is a new type of improved interior wall painting material formed by dry mixing semi-hydrated gypsum as the base material, high molecular polymer as the gelling material, and inorganic fillers.

[0003] Since some of the hard raw materials in the gypsum mortar need to be crushed during the mixing process, at present, motor crushing and stirring are mostly adopted for processing. However, processing gypsum mortar raw materials that are too large will cause a load on the motor, causing the motor to overload and increase the current, causing the motor to heat up and the temperature to rise. Finally, the enameled wire will be burned or the insulation layer will be damaged by the temperature, causing the motor to break. This not only easily causes the production process to be interrupted, but also makes it difficult to ensure the processing efficiency of the gypsum mortar, and it is difficult to ensure the safety of the motor and the processing environment. Summary of the Invention

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides an environmentally friendly mortar production line with continuous forced stirring. The technical problem to be solved by the present invention is: at present, when processing gypsum mortar raw materials, motor crushing and stirring are mostly adopted, but when processing gypsum mortar raw materials with too large a volume, it will cause a load on the motor, causing the motor to overload and the current to increase, causing the motor to heat up and the temperature to rise. Finally, the enameled wire will be burned or the insulation layer will be destroyed by the temperature, causing the motor to break, which not only easily causes the production process to be interrupted, but also makes it difficult to ensure the processing efficiency of the gypsum mortar, and it is difficult to ensure the safety of the motor and the processing environment.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an environmentally friendly mortar production line with continuous forced mixing, comprising a raw material bin, wherein the number of the raw material bins is two, and a belt scale is provided under each of the two raw material bins, the raw material bin is connected to a disintegrating device via a first conveyor belt device, the disintegrating device is connected to an impeller feeder via a second conveyor belt device, a sealing shell is provided on the lower surface of the impeller feeder, a hammer dryer is provided in the sealing shell, a dryer turntable is provided on the left side of the hammer dryer, the disintegrating device comprises a mounting casing, the inner wall of the mounting casing is fixedly connected to the outer surface of the raw material processing cylinder, the back side of the raw material processing cylinder is fixedly connected to the front side of the driving device, the mounting casing The inner wall of the cylinder is clamped with four first bearings, and the same second driving shaft is sleeved in the four first bearings. One end of the front side of the driving device is fixedly connected to one end of the back side of the first driving shaft. The outer surfaces of the first driving shaft and the second driving shaft are fixedly connected to transmission wheels, and the outer surfaces of the two transmission wheels are wrapped with the same transmission belt. The two transmission wheels are connected by transmission belts. The outer surface of the first driving shaft is sleeved with two second bearings, and the two second bearings are respectively clamped on the left and right side surfaces of the inner wall of the raw material processing cylinder. Four vibration grooves are provided on the outer surface of the raw material processing cylinder and the upper surface of the inner wall of the mounting casing. Four vibration devices are fixedly connected to the outer surface of the second driving shaft, and the four vibration devices are respectively located in the four vibration grooves.

[0006] As a further solution of the present invention: the outer surface of the vibration device overlaps with the inner wall of the vibration groove located on the surface of the raw material processing cylinder, the outer surface of the first drive shaft is fixedly connected with a stirring blade, and the stirring blade is configured as a spiral blade, and the outer surface of the stirring blade overlaps with the inner wall of the raw material processing cylinder.

[0007] As a further solution of the present invention: the vibration device includes a cam, and the front and back sides of the inner wall of the cam are clamped with the same pulley through bearings and a rotating shaft, the outer surface of the pulley is clamped with the inner wall of the vibration groove located on the surface of the raw material processing cylinder, and the pulley is set to be an elastic pulley.

[0008] As a further solution of the present invention: the outer surface of the first drive shaft is fixedly connected to a crushing wheel, the crushing wheel is composed of a plurality of wheel discs, the outer surface of the crushing wheel is provided with a plurality of crushing grooves, and the outer surface of the crushing wheel overlaps with the inner wall of the raw material processing barrel.

[0009] As a further solution of the present invention: the driving device includes a mounting seat, the front side of the mounting seat is fixedly connected to the back side of the raw material processing cylinder, the upper surface of the mounting seat is fixedly connected to a driving motor, and one end of the front side of the driving motor is fixedly connected to one end of the back side of the first driving shaft.

[0010] As a further solution of the present invention: the outer surface of the raw material processing cylinder and the lower surface of the mounting shell are each provided with two discharge troughs, and the corresponding two discharge troughs are connected. The outer surface of the raw material processing cylinder and the upper surface of the mounting shell are each provided with discharge ports, and the two discharge ports are connected.

[0011] As a further solution of the present invention: a sealing cover is fixedly connected to the upper surface of the mounting housing, the sealing cover is connected to the discharge port, and the four first bearings are respectively clamped on the front and back of the mounting housing and the front and back of the inner wall of the discharge port.

[0012] As a further solution of the present invention: a plurality of transmission blades are fixedly connected to the outer surface of the second drive shaft, and the plurality of transmission blades are all arranged in the discharge port.

[0013] The beneficial effects of the present invention are:

[0014] 1. The present invention is provided with a driving device, a crushing wheel, a cam, a vibration groove, a pulley and a transmission blade. When the driving device is running, the driving device drives the second driving shaft to rotate through the first driving shaft, the transmission wheel and the transmission belt, so that the first driving shaft and the second driving shaft are in a synchronous rotation state, and when the raw material enters the raw material processing cylinder, it will directly fall on the surface of the crushing wheel, and as the crushing wheel rotates, the material is effectively crushed. When processing large pieces of material, the shielding of the transmission blade can effectively prevent the large pieces of raw material in the raw material processing cylinder from being squeezed and flying to the outside. At the same time, the cam will repeatedly squeeze the surface of the raw material processing cylinder as the second driving shaft rotates. When the large pieces of raw material block the rotation of the crushing wheel, they will gradually fall with the vibration, avoiding the situation that the driving motor is overloaded due to the jamming of the crushing wheel and the large pieces of raw material during operation, and avoiding the situation that the driving motor is damaged by overheating due to load operation, thereby ensuring the processing efficiency of the production line for raw materials, and at the same time ensuring the production environment and the operation safety of the production line.

[0015] 2. The present invention is provided with a stirring blade, a driving motor, a raw material processing cylinder and a discharge chute. When the crushing wheel finishes crushing the raw material, the raw material will gradually be converted into small pieces and powder. At this time, as the raw material gradually enters, the processed raw material will move along both sides of the raw material processing cylinder under the action of the subsequent falling raw material extrusion. When the processed raw material contacts the stirring blade, it will be quickly mixed. When the mixed raw material is located above the discharge chute, it will fall to the surface of the second conveyor belt device under gravity and then be transferred to the impeller feeder. This allows the production line to stably transfer the material during use, avoiding the occurrence of incomplete material mixing. At the same time, the integrated crushing and mixing design improves the processing efficiency of the production line and ensures the processing effect of the raw material.

[0016] 3. The present invention sets a cam and a pulley. When the cam rotates, the pulley will rotate with the cam and repeatedly contact the vibration groove opened on the surface of the raw material processing cylinder, thereby driving the raw material processing cylinder to be in a state of high-frequency vibration. Since the pulley is set as an elastic pulley, the pulley will be in a contracted state when contacting the vibration groove, avoiding the pulley from getting stuck when contacting the vibration groove, ensuring the stability of the cam during rotation, and ensuring the vibration effect of the cam on the raw material processing cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the process of the present invention;

[0018] Figure 2 It is a schematic diagram of the three-dimensional structure of the breaking up device of the present invention;

[0019] Figure 3 It is a three-dimensional structural diagram of the driving device of the present invention;

[0020] Figure 4 It is a schematic diagram of the three-dimensional cross-sectional structure of the breaking up device of the present invention;

[0021] Figure 5 This is a schematic diagram of the three-dimensional structure of the crushing wheel of the present invention;

[0022] Figure 6 This is an enlarged structural diagram of point A of the present invention;

[0023] In the figure: 1 raw material bin, 2 belt scale, 3 first conveyor belt device, 4 dispersing device, 41 mounting housing, 42 raw material processing cylinder, 43 driving device, 431 mounting base, 432 driving motor, 44 first driving shaft, 45 first bearing, 46 second driving shaft, 47 transmission wheel, 48 transmission belt, 49 second bearing, 410 stirring blade, 411 crushing wheel, 412 crushing trough, 413 vibration device, 4131 cam, 4132 pulley, 414 vibration trough, 415 transmission blade, 416 discharge chute, 417 sealing cover, 418 discharge port, 5 second conveyor belt device, 6 impeller feeder, 7 sealing shell, 8 hammer dryer, 9 dryer turntable. DETAILED DESCRIPTION

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] like Figure 1-6As shown, the present invention provides an environmentally friendly mortar production line with continuous forced mixing, including a raw material warehouse 1, the number of raw material warehouses 1, and a belt scale 2 is provided under each of the two raw material warehouses 1. The raw material warehouse 1 is connected to a scattering device 4 through a first conveyor belt device 3, and the scattering device 4 is connected to an impeller feeder 6 through a second conveyor belt device 5. A sealing shell 7 is provided on the lower surface of the impeller feeder 6, and a hammer dryer 8 is provided in the sealing shell 7. A dryer wheel 9 is provided on the left side of the hammer dryer 8. The scattering device 4 includes a mounting housing 41, and the inner wall of the mounting housing 41 is connected to the raw material processing cylinder 42. The outer surface of the raw material processing cylinder 42 is fixedly connected, the back of the raw material processing cylinder 42 is fixedly connected to the front of the driving device 43, the inner wall of the mounting housing 41 is clamped with four first bearings 45, and the same second driving shaft 46 is sleeved in the four first bearings 45, one end of the front of the driving device 43 is fixedly connected to one end of the back of the first driving shaft 44, the outer surfaces of the first driving shaft 44 and the second driving shaft 46 are fixedly connected with a transmission wheel 47, and the outer surfaces of the two transmission wheels 47 are wrapped with the same transmission belt 48, and the two transmission wheels 47 are connected through the transmission belt 48. The outer surface of the first driving shaft 44 is sleeved with two second transmission wheels 47. The second bearing 49 is respectively connected to the left and right sides of the inner wall of the raw material processing cylinder 42. The outer surface of the raw material processing cylinder 42 and the upper surface of the inner wall of the mounting housing 41 are provided with four vibration grooves 414. The outer surface of the second drive shaft 46 is fixedly connected with four vibration devices 413, and the four vibration devices 413 are respectively located in the four vibration grooves 414. By arranging the drive device 43, the crushing wheel 411, the cam 4131 and the vibration groove 414, when processing large pieces of material, the large pieces of raw material in the raw material processing cylinder 42 can be effectively prevented from being squeezed out by the shielding of the conveying blades. At the same time, the cam 4131 will repeatedly squeeze the surface of the raw material processing cylinder 42 as the second drive shaft 46 rotates. When large pieces of raw materials block the rotation of the crushing wheel 411, they will gradually fall off with the vibration, avoiding the overload operation of the drive motor 432 due to the jamming of the crushing wheel 411 and the large pieces of raw materials during operation, and avoiding the heat and damage of the drive motor 432 due to load operation, thereby ensuring the raw material processing efficiency of the production line and protecting the production environment and the operation safety of the production line.

[0026] like Figure 2 、 Figure 3 、 Figure 4 and Figure 6As shown, the outer surface of the vibration device 413 overlaps with the inner wall of the vibration groove 414 located on the surface of the raw material processing cylinder 42, and the outer surface of the first drive shaft 44 is fixedly connected with a stirring blade 410, and the stirring blade 410 is set as a spiral blade. Due to the provision of the stirring blade 410, the production line can transport the raw materials during the process of crushing and mixing the raw materials, thereby ensuring the efficiency of the production line in processing the raw materials and avoiding the problem of raw material blockage. In addition, the stirring blade 410 and the raw material processing cylinder 42 are mutually engaged, so that the stirring blade 410 can The raw materials adhering to the inside of 42 are scraped off to avoid the adhesion of the raw materials, thereby ensuring that the production line can automatically clean the inside of the raw material processing cylinder 42. Since the outer surface of the stirring blade 410 overlaps with the inner wall of the raw material processing cylinder 42, the vibration device 413 includes a cam 4131, and the front and back of the inner wall of the cam 4131 are clamped with the same pulley 4132 through bearings and rotating shafts. The outer surface of the pulley 4132 is clamped with the inner wall of the vibration groove 414 located on the surface of the raw material processing cylinder 42, and the pulley 4132 is set as an elastic pulley.

[0027] like Figure 3 、 Figure 5 and Figure 6 As shown, the outer surface of the first driving shaft 44 is fixedly connected to a crushing wheel 411, which is composed of a plurality of wheel discs. The outer surface of the crushing wheel 411 is provided with a plurality of crushing grooves 412. The outer surface of the crushing wheel 411 overlaps with the inner wall of the raw material processing cylinder 42. The driving device 43 includes a mounting seat 431. The front of the mounting seat 431 is fixedly connected to the back of the raw material processing cylinder 42. Because the raw material processing cylinder 42 and the discharge chute 416 are provided, the mixed raw materials will fall to the surface of the second conveyor belt device 5 along with gravity when they are located above the discharge chute 416, and then be transmitted to the impeller feeder 6, so that the production line can be used in the process of The material can be transported stably to avoid incomplete mixing of the material. At the same time, the integrated crushing and mixing design improves the processing efficiency of the production line and ensures the processing effect of the raw materials. The upper surface of the mounting seat 431 is fixedly connected to the drive motor 432, and the front end of the drive motor 432 is fixedly connected to the back end of the first drive shaft 44. The outer surface of the raw material processing cylinder 42 and the lower surface of the mounting casing 41 are provided with two discharge troughs 416, and the corresponding two discharge troughs 416 are connected. The outer surface of the raw material processing cylinder 42 and the upper surface of the mounting casing 41 are provided with discharge ports 418, and the two discharge ports 418 are connected.

[0028] like Figure 2 、 Figure 5 and Figure 6As shown, a sealing cover 417 is fixedly connected to the upper surface of the mounting housing 41, and the sealing cover 417 is connected to the discharge port 418. Due to the provision of the sealing cover 417, the raw materials falling onto the surface of the sealing cover 417 will enter the raw material processing cylinder 42 along the inclined surface inside the sealing cover 417 and under the action of gravity, thereby avoiding the situation where the raw materials overflow and fall. At the same time, the blocking of the transmission blades 415 can effectively ensure the stability of the production line in material processing, and the four first bearings 45 are respectively clamped on the front and back of the mounting housing 41 and the discharge port 418. 8 The front and back sides of the inner wall are provided with cams 4131. Since the pulley 4132 is provided as an elastic pulley, the pulley 4132 will be in a contracted state when contacting the vibration groove 414, thereby avoiding the pulley 4132 from getting stuck when contacting the vibration groove 414, ensuring the stability of the cam 4131 during rotation, and ensuring the vibration effect of the cam 4131 on the raw material processing cylinder 42. The outer surface of the second drive shaft 46 is fixedly connected with a plurality of transmission blades 415, and the plurality of transmission blades 415 are all provided in the discharge port 418.

[0029] Working principle of the present invention: When using the production line, it is necessary to place the raw materials in the raw material warehouse 1, weigh the raw materials through the belt scale 2, and then transmit them to the scattering device 4 through the first conveyor belt device 3. After being processed by the scattering device 4, it is transmitted to the sealed shell 7 through the second conveyor belt device 5. When the material enters the scattering device 4, it will fall into the sealing cover 417. At this time, the material will enter the discharge port 418 in sequence under the action of the rotation of the transmission blade 415. Since the driving device 43 is in operation, the driving device 43 will drive the second driving shaft 46 to rotate through the first driving shaft 44, the transmission wheel 47 and the transmission belt 48, so that the first driving shaft 44 and the second driving shaft 46 are in a synchronous rotation state. At this time, the second driving shaft 46 will collect the raw materials that fall into the sealing cover 417 through the transmission blade 415 and discharge the raw materials into the raw material processing cylinder 42, and when the raw materials enter the raw material processing cylinder When the raw materials are in the processing barrel 42, they will directly fall onto the surface of the crushing wheel 411, and as the crushing wheel 411 rotates, the materials are effectively crushed. At the same time, the cam 4131 will repeatedly squeeze the surface of the raw material processing barrel 42 as the second drive shaft 46 rotates. When large pieces of raw materials block the rotation of the crushing wheel 411, they will gradually fall off with the vibration. As the crushing wheel 411 crushes the raw materials, the raw materials will gradually be converted into small pieces and powder. At this time, as the raw materials gradually enter, the processed raw materials will move along both sides of the raw material processing barrel 42 under the action of the subsequent falling raw materials squeezing. When the processed raw materials come into contact with the stirring blades 410, they will be quickly mixed and move to both sides along the rotation of the stirring blades 410. When the mixed raw materials are located above the discharge chute 416, they will fall to the surface of the second conveyor belt device 5 due to gravity, and then be transmitted to the impeller feeder 6.

[0030] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense, and may refer to mechanical or electrical connections, internal communication between two components, or direct connection. "Up," "down," "left," and "right" are only used to indicate relative positional relationships. When the absolute positions of the objects being described change, the relative positional relationships may also change.

[0031] Secondly: The drawings of the embodiments disclosed in the present invention only involve structures related to the embodiments disclosed in the present invention. Other structures may refer to conventional designs. The same embodiment and different embodiments of the present invention may be combined with each other without conflict.

[0032] Finally: The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A continuous forced stirring environmentally friendly mortar production line, comprising a raw material bin (1), characterized in that: There are two raw material bins (1), and a belt scale (2) is provided below each of the two raw material bins (1). The raw material bin (1) is connected to a scattering device (4) via a first conveyor belt device (3), and the scattering device (4) is connected to an impeller feeder (6) via a second conveyor belt device (5). A sealing shell (7) is provided on the lower surface of the impeller feeder (6), and a hammer dryer (8) is provided in the sealing shell (7). A dryer turntable (9) is provided on the left side of the hammer dryer (8). The disintegrating device (4) includes a mounting housing (41), the inner wall of the mounting housing (41) is fixedly connected to the outer surface of the raw material processing cylinder (42), the back of the raw material processing cylinder (42) is fixedly connected to the front of the driving device (43), the inner wall of the mounting housing (41) is clamped with four first bearings (45), and the four first bearings (45) are sleeved with the same second driving shaft (46), one end of the front of the driving device (43) is fixedly connected to one end of the back of the first driving shaft (44), the outer surfaces of the first driving shaft (44) and the second driving shaft (46) are fixedly connected to the transmission wheel (47), and the two The outer surface of the transmission wheel (47) is wrapped with a same transmission belt (48), and the two transmission wheels (47) are connected by the transmission belt (48). The outer surface of the first drive shaft (44) is sleeved with two second bearings (49), and the two second bearings (49) are respectively clamped on the left and right side surfaces of the inner wall of the raw material processing cylinder (42). The outer surface of the raw material processing cylinder (42) and the upper surface of the inner wall of the mounting housing (41) are both provided with four vibration grooves (414). The outer surface of the second drive shaft (46) is fixedly connected with four vibration devices (413), and the four vibration devices (413) are respectively located in the four vibration grooves (414); The vibration device (413) includes a cam (4131), the front and back sides of the inner wall of the cam (4131) are connected to a same pulley (4132) via a bearing and a rotating shaft, the outer surface of the pulley (4132) is mutually connected to the inner wall of the vibration groove (414) located on the surface of the raw material processing cylinder (42), and the pulley (4132) is configured as an elastic pulley; A crushing wheel (411) is fixedly connected to the outer surface of the first drive shaft (44), the crushing wheel (411) being composed of a plurality of wheel discs, a plurality of crushing grooves (412) being formed on the outer surface of the crushing wheel (411), and the outer surface of the crushing wheel (411) and the inner wall of the raw material processing cylinder (42) being overlapped with each other; A plurality of transmission blades (415) are fixedly connected to the outer surface of the second drive shaft (46), and the plurality of transmission blades (415) are all arranged in the discharge port (418).

2. The environmentally friendly mortar production line with continuous forced stirring according to claim 1, characterized in that: The outer surface of the vibration device (413) overlaps with the inner wall of the vibration groove (414) located on the surface of the raw material processing cylinder (42), and the outer surface of the first driving shaft (44) is fixedly connected with a stirring blade (410), and the stirring blade (410) is configured as a spiral blade. The outer surface of the stirring blade (410) overlaps with the inner wall of the raw material processing cylinder (42).

3. The environmentally friendly mortar production line with continuous forced stirring according to claim 1, characterized in that: The driving device (43) includes a mounting seat (431), the front surface of the mounting seat (431) is fixedly connected to the back surface of the raw material processing cylinder (42), the upper surface of the mounting seat (431) is fixedly connected to a driving motor (432), and one end of the front surface of the driving motor (432) is fixedly connected to one end of the back surface of the first driving shaft (44).

4. The environmentally friendly mortar production line with continuous forced stirring according to claim 1, characterized in that: The outer surface of the raw material processing cylinder (42) and the lower surface of the mounting housing (41) are both provided with two discharge troughs (416), and the corresponding two discharge troughs (416) are connected. The outer surface of the raw material processing cylinder (42) and the upper surface of the mounting housing (41) are both provided with discharge ports (418), and the two discharge ports (418) are connected.

5. The environmentally friendly mortar production line with continuous forced stirring according to claim 4, characterized in that: A sealing cover (417) is fixedly connected to the upper surface of the mounting housing (41), the sealing cover (417) is connected to the discharge port (418), and four first bearings (45) are respectively clamped on the front and back sides of the mounting housing (41) and the front and back sides of the inner wall of the discharge port (418).

Citation Information

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