A multi-stage mixing device for mortar mixing

By using a motor-driven jet and stirring mechanism in the mortar multi-stage mixing device, combined with air compression and inclined deflectors, the problems of poor fluidity and adhesion of raw materials are solved, and the full mixing of mortar is achieved.

CN118952460BActive Publication Date: 2025-01-03FUJIAN QUANZHOU WANGLALI BUILDING MATERIALS CO LTD
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Patent Information

Application Number
CN202411419167.1
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-10-12
Publication Date
2025-01-03
Estimated Expiration
2044-10-12

AI Technical Summary

Technical Problem

During the stirring process of the existing mortar multi-stage mixing device, the raw materials have poor fluidity and are prone to fall or stick to the wall, resulting in poor stirring effect and inability to mix fully.

Method used

A multi-stage mixing device is designed, using a motor-driven connection long shaft to drive the injection mechanism and the stirring mechanism, and generates air flow through the air compressor for raw materials to spray and stir. Combined with an inclined deflector and elastic stirring plate, ensuring that the raw materials are in full contact and mix.

Benefits of technology

Through airflow injection and rotary stirring, the full circulation and mixing of the mortar raw materials is achieved, avoiding the drop and adhesion of the raw materials, and improving the stirring effect.

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Abstract

The present invention discloses a multi-stage mixing device for mortar mixing, which structure comprises a feeding port, a primary mixing tank, a secondary mixing tank, a supporting foot, and a discharging port. The feeding port is embedded in the upper right end of the primary mixing tank, a tank body arranged on the primary mixing tank is established on the upper end of the secondary mixing tank through the supporting foot, the secondary mixing tank is welded with the supporting foot, and a discharging port is embedded in the middle end of the bottom of the secondary mixing tank. Air is compressed by an air compressor and discharged into the inside of a connected air intake pipe through a sleeve pipe. Under the connection of a diverter ring, the air is dispersed into the insides of the other two air intake pipes, and the air is compressed by convex strips arranged inside the air intake pipe, so that the air is ejected from the inside of the air nozzle to apply airflow to the raw materials inside the tank body. Through the coordinated use of three groups of air intake pipes and air nozzles, the range of the ejected airflow is diffused, the effect of the airflow on the overall injection of the raw materials is improved, and the mortar raw materials circulate and are fully stirred.
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Description

Technical Field

[0001] The present invention relates to the technical field of mortar preparation, and more specifically, to a multi-stage mixing device for mortar mixing. Background Art

[0002] Mortar is a bonding material used for bricklaying in construction. It is made of a certain proportion of sand and bonding materials (cement, lime paste, clay, etc.) plus water. It is mainly used for masonry structures and painting. All raw materials for preparing mortar are stirred and mixed through a multi-stage mixing device to form mortar.

[0003] However, the existing mortar multi-stage mixing device has the following shortcomings when stirring and mixing mortar raw materials: the mortar raw materials have poor fluidity after entering the first-level mixing chamber, and are likely to fall directly to the bottom of the first-level mixing chamber due to their own weight or be directly discharged from the bottom of the first-level mixing chamber into the second-level mixing chamber, so that the stirring blades in the first-level mixing chamber are not in contact with the raw materials, which makes it difficult to fully stir and mix the mortar raw materials. At the same time, the raw materials are easily adhered to the inner wall of the first-level mixing chamber during the stirring of the raw materials by the stirring blades, resulting in the mortar cannot be fully mixed. Summary of the invention

[0004] The technical solution adopted by the present invention to achieve the technical purpose is: a multi-stage mixing device for mortar mixing, whose structure includes a feeding port, a primary mixing tank, a secondary mixing tank, a supporting foot, and a discharging port, wherein the feeding port is embedded in the upper right end of the primary mixing tank, the tank body arranged on the primary mixing tank is established on the upper end of the secondary mixing tank through the supporting foot, the secondary mixing tank is welded with the supporting foot, and the discharging port is embedded in the middle end of the bottom of the secondary mixing tank, a motor is installed on the top of the tank body, a connecting long shaft, an injection mechanism and a compression mechanism are installed inside the tank body, the top of the connecting long shaft is driven to rotate by the motor, and the connecting long shaft is passed through the inside of a diverter ring arranged in the middle of the injection mechanism by a clearance fit, and the connecting long shaft is assisted in sliding by a ball arranged on the inner wall of the diverter ring when the connecting long shaft rotates, and three air inlet pipes are also arranged on the outside of the diverter ring, one of which is connected with the compression mechanism, and a guide groove is arranged inside the diverter ring;

[0005] The inner wall of the air intake pipe is provided with a convex strip, and an air nozzle is embedded in the bottom of the air intake pipe. The lower end of the air nozzle is connected to the opening and closing piece through a torsion spring shaft. The air entering the air intake pipe is compressed by the convex strip, and torsional elasticity is applied by the torsion spring shaft, so that the air pushes the opening and closing piece to swing when it is ejected from the air nozzle.

[0006] As a further improvement of the present invention, the compression mechanism is composed of an air compressor, a sleeve tube, an air intake filter plate, a buffer mechanism and a clamping sheet. The air compressor is fitted and installed at the upper left end of the outer side of the tank body. The sleeve tube arranged on the right side of the air compressor is sleeved and connected with the left end of one of the air intake pipes to compress the air into the air intake pipe. The air compressor filters the intake air through the air intake filter plate arranged on the left side. The buffer mechanism is fixedly installed at the upper left end of the outer side of the tank body, and the air compressor is elastically clamped by the buffer mechanism and the clamping sheet. The inner diameter of the sleeve tube matches the outer diameter of the air intake pipe, and the air intake pipe can be quickly disassembled and assembled inside the sleeve tube.

[0007] The buffer mechanism includes a fixed support plate, an extrusion rod, a telescopic hose and a conducting port. The inner side of the fixed support plate is connected to the clamping piece through the extrusion rod, and the elastic force is applied to the connection between the extrusion rod and the inside of the fixed support plate through the telescopic hose. The outer end of the telescopic hose passes through a conducting port. Two clamping pieces are provided, and the left and right sides of the air compressor are clamped.

[0008] As a further improvement of the present invention, a guide plate and a stirring mechanism are also provided inside the tank body. The guide plate is used to guide the raw materials to the middle end of the tank body to contact the stirring mechanism. The stirring mechanism is arranged on the outside of the connecting long axis. The stirring mechanism is driven to rotate and stir through the connecting long axis. The guide plate is installed at an inclined angle and is connected to the feeding port.

[0009] As a further improvement of the present invention, the connecting short shaft arranged on the stirring mechanism is installed on the outside of the connecting long shaft, and the torsion shaft arranged at the connection between the stirring plate arranged on the stirring mechanism and the connecting short shaft applies elastic force to drive the stirring plate to swing elastically, and the needle punctures arranged on the surface of the stirring plate can puncture excess bubbles generated when the raw materials are stirred inside the tank body, thereby avoiding the generation of more bubbles during the stirring process of the raw materials and affecting the quality of the mortar.

[0010] As a further improvement of the present invention, the stirring plate is provided with a compression spring, an extrusion shaft, a sleeve, a connecting plate and a scraper strip at one end close to the tank body. The compression spring and the sleeve are used to apply a lateral elastic buffer to the extrusion shaft on the outside of the stirring plate. The connecting plate rotates synchronously with the stirring plate at the inner edge of the tank body. The rotating connecting plate drives the scraper strip on the outside to scrape the inner wall of the tank body. Three scraper strips are equidistantly distributed on the outside of the connecting plate, and the contact ends of the scraper strips with the inner wall of the tank body are pointed.

[0011] As a further improvement of the present invention, a scraper is also provided at the lower end of the connecting plate. The scraper is installed at an inclined angle and the bottom surface of the scraper is against the inclined end surface of the bottom of the tank body. The rotating connecting plate can drive the scraper to scrape the lower end of the tank body for material discharge.

[0012] The beneficial effects of the present invention are:

[0013] 1. Compress the air through the air compressor and discharge the compressed air into the connected air intake pipe through the sleeve pipe. Under the connection of the diverter ring, the air is dispersed into the other two air intake pipes, and the air is compressed through the convex strips arranged inside the air intake pipe, so that the air is ejected from the air nozzle to apply airflow to the raw materials inside the tank. Through the coordinated use of three groups of air intake pipes and air nozzles, the range of the ejected airflow is expanded, the effect of the airflow on the raw materials is improved, and the mortar raw materials are circulated and fully stirred;

[0014] 2. When the raw materials enter the tank from the feeding port, they contact the guide plate and guide the raw materials to be fully tilted and discharged into the middle end of the tank to fully contact the stirring plate, so as to prevent some raw materials from vertically falling to the bottom of the tank along the feeding port and the inner wall of the tank. The motor is started to drive the connecting long shaft to rotate, and the stirring plate installed on the outside of the connecting long shaft follows the rotation to stir the raw materials. At the same time, the torsion shaft applies elastic force to drive the stirring plate to swing elastically, so as to fully contact the raw materials and stir and mix the raw materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The present invention is a schematic structural diagram of a multi-stage mixing device for mortar mixing.

[0016] Figure 2 Schematic diagram of the internal structure of the multi-stage mixing device of the present invention.

[0017] Figure 3 It is a schematic diagram of the top structure of the injection mechanism of the present invention.

[0018] Figure 4 It is a schematic diagram of the interior and partial enlarged structure of the air intake pipe of the present invention.

[0019] Figure 5 It is a schematic diagram of the internal structure of the primary mixing tank viewed from above according to the present invention.

[0020] Figure 6 For the present invention Figure 5 Schematic diagram of the local enlarged structure at A.

[0021] Figure 7 It is a front view structural schematic diagram of the stirring mechanism of the present invention.

[0022] Figure 8 It is a schematic diagram of the side view, partial enlargement of the stirring plate and the top view of the scraper bar of the present invention.

[0023] In the figure: feeding port 1, primary mixing tank 2, secondary mixing tank 3, spiral stirrer 31, support foot 4, discharge port 5, tank body 21, motor 22, guide plate 211, connecting long shaft 212, injection mechanism 213, compression mechanism 214, stirring mechanism 215, air intake pipe 2131, diverter ring 2132, ball 2133, convex strip 1311, air nozzle 1312, torsion spring shaft 1313, opening and closing piece 1314, air compressor -2141, sleeve tube-2142, air intake filter plate-2143, buffer mechanism-2144, supporting plate-2145, fixed support plate-1441, extrusion rod-1442, telescopic hose-1443, conducting port-1444, connecting long shaft-2151, torsion shaft-2152, stirring plate-2153, acupuncture-2154, compression spring-1531, extrusion shaft-1532, bushing-1533, connecting plate-1534, scraper strip-1535, scraper-1536. DETAILED DESCRIPTION

[0024] The present invention is further described below in conjunction with the accompanying drawings: Example 1

[0025] As attached Figure 1 To Attachment Figure 6 As shown:

[0026] The present invention discloses a multi-stage mixing device for mortar mixing, and the structure thereof comprises a feeding port 1, a primary mixing tank 2, a secondary mixing tank 3, a supporting foot 4, and a discharging port 5. The feeding port 1 is embedded in the upper right end of the primary mixing tank 2, a tank body 21 arranged on the primary mixing tank 2 is established on the upper end of the secondary mixing tank 3 through a supporting foot, the secondary mixing tank 3 is welded with the supporting foot 4, and the discharging port 5 is embedded in the middle end of the bottom of the secondary mixing tank 3, a motor 22 is installed on the top of the tank body 21, and a connecting long shaft 212, an injection mechanism 213 and a compression mechanism 214 are installed inside the tank body 21, and the motor 22 is used to inject the material into the tank body 21. The top of the connecting long shaft 212 is driven to rotate, and the connecting long shaft 212 is inserted into the inside of the diverter ring 2132 provided in the middle of the injection mechanism 213 by a clearance fit. When the connecting long shaft 212 rotates, it is assisted in sliding by the ball 2133 provided on the inner wall of the diverter ring 2132. Three air inlet pipes 2131 are also provided on the outer side of the diverter ring 2132, and one of the air inlet pipes 2131 is connected to the compression mechanism 214 through the air inlet pipe 2131. The inner wall of the air inlet pipe 2131 is provided with a convex strip 1311, and the bottom of the air inlet pipe 2131 is embedded with an air nozzle 1312, and the lower end of the air nozzle 1312 is connected to the compression mechanism 214 through the torsion spring shaft 1 313 is connected to the opening and closing plate 1314; the compression mechanism 214 is composed of an air compressor 2141, a sleeve pipe 2142, an air intake filter plate 2143, a buffer mechanism 2144 and a clamping plate 2145. The air compressor 2141 is fitted and installed at the upper left end of the outer side of the tank body 21. The sleeve pipe 2142 set on the right side of the air compressor 2141 is sleeved and connected with the left end of one of the air intake pipes 2131 to compress the air into the interior of the air intake pipe 2131. The air compressor 2141 filters the intake air through the air intake filter plate 2143 set on the left side. The buffer mechanism 214 4 is fixedly installed at the upper left end of the outer side of the tank body 21, and the air compressor 2141 is elastically clamped by a buffer mechanism 2144 and a clamping piece 2145; the buffer mechanism 2144 includes a fixed support plate 1441, an extrusion rod 1442, a telescopic hose 1443 and a conducting port 1444, the inner side of the fixed support plate 1441 is connected to the clamping piece 2145 by the extrusion rod 1442, and the extrusion rod 1442 and the inner connection of the fixed support plate 1441 are applied with elastic force by the telescopic hose 1443, and the outer end of the telescopic hose 1443 is penetrated with a conducting port 1444;In the present invention, the starting motor 22 drives the connecting long shaft 212 to rotate, and then the mortar raw material is put into the feeding port 1. At the same time, the air is compressed by the air compressor 2141 and discharged into the connected air intake pipe 2131 through the sleeve pipe 2142. Under the connection of the diverter ring 2132, the air is dispersed into the other two air intake pipes 2131, and the convex strips 1311 provided inside the air intake pipe 2131 compress the air, so that the air is ejected from the air nozzle 1312 to apply airflow to the raw material inside the tank body 21. Through the coordinated use of the three groups of air intake pipes 2131 and the air nozzle 1312, the range of the ejected airflow is diffused, the effect of the airflow on the raw material is improved, and the mortar raw material circulates and is fully stirred. ;

[0027] A preferred technical solution is that the diverter ring 2132 is provided with a guide groove inside, and the guide groove can disperse the air entering from one of the air inlet pipes 2131 to the inside of the other two air inlet pipes 2131, thereby diversifying the air flow range and improving the effect of the air flow on the overall injection of the raw material;

[0028] A preferred technical solution, the convex strips 1311 are provided with two and are arranged on both sides of the upper end of the air inlet pipe 2131, compressing the air entering the air inlet pipe 2131, accelerating the flow speed of the air in the air inlet pipe 2131, so that the air is quickly ejected from the air nozzle 1312 to apply airflow to the raw materials in the tank body 21, and applying torsional elasticity through the torsion spring shaft 1313, so that the air pushes the opening and closing piece 1314 to swing when ejecting from the air nozzle 1312, and drives the opening and closing piece 1314 to return to the surface of the air outlet port of the air nozzle 1312 when the air jet stops, so as to prevent the raw materials in the tank body 21 from floating into the air nozzle 1312 and causing blockage;

[0029] A preferred technical solution, the inner diameter of the sleeve 2142 matches the outer diameter of the air inlet pipe 2131, the air inlet pipe 2131 can be quickly disassembled and assembled inside the sleeve 2142, and the clamping piece 2145 is used to elastically clamp the air compressor 2141, so that the air compressor 2141 can be quickly disassembled and assembled outside the tank body 21, so that the air compressor 2141 can be disassembled for inspection and maintenance after use;

[0030] A preferred technical solution is that two clamping plates 2145 are provided to clamp the left and right sides of the air compressor 2141. When clamping, the vibration generated by the air compressor 2141 is absorbed by the telescopic hose 1443 and the vibration potential energy is released through the conducting port 1444, ensuring that the air compressor 2141 can be stably installed on the outside of the tank body 21 to perform compressed air work.

[0031] Embodiment 2: Based on embodiment 1, as shown in the attached Figure 2 , Attachment Figure 7 and attached Figure 8 As shown:

[0032] The tank body 21 is also provided with a guide plate 211 and a stirring mechanism 215. The guide plate 211 guides the raw materials to the middle end of the tank body 21 to contact the stirring mechanism 215. The stirring mechanism 215 is arranged on the outside of the connecting long axis 212, and the stirring mechanism 215 is driven to rotate and stir through the connecting long axis 212; the connecting short axis 2151 arranged on the stirring mechanism 215 is installed on the outside of the connecting long axis 212, and the stirring plate 2153 arranged on the stirring mechanism 215 and the torsion shaft 2152 arranged at the connection between the connecting short axis 2151 and the stirring plate 2153 exerts elastic force to drive the stirring plate 2153 to swing elastically, and the needle 2154 arranged on the surface of the stirring plate 2153 can stir the raw materials in the tank body 21 The excess bubbles generated during the mixing of the raw materials are punctured to avoid the generation of too many bubbles during the mixing of the raw materials and the influence on the quality of the mortar; the stirring plate 2153 is provided with a compression spring 1531, an extrusion shaft 1532, a sleeve 1533, a connecting plate 1534 and a scraping strip 1535 at one end close to the tank body 21, and the compression spring 1531 and the sleeve 1533 are used to apply a lateral elastic buffer to the extrusion shaft 1532 on the outer side of the stirring plate 2153, and the connecting plate 1534 rotates synchronously with the stirring plate 2153 on the inner edge of the tank body 21, and the rotating connecting plate 1534 drives the outer scraping strip 1535 to scrape the inner wall of the tank body 21; the lower end of the connecting plate 1534 is also provided with a scraper 1536, which scrapes the inner wall of the tank body 21. The plate 1536 is installed at an inclined angle and the bottom surface of the scraper 1536 is against the inclined end surface of the bottom of the tank body 21; in the present invention, when the raw material enters the tank body 21 from the feeding port 1, it contacts the guide plate 211 to guide the raw material to be fully inclined and discharged into the middle end of the tank body 21 to fully contact the stirring plate 2153, so as to prevent part of the raw material from vertically falling to the bottom of the tank body 21 along the feeding port 1 and the inner wall of the tank body 21. The connecting long shaft 212 is driven to rotate by starting the motor 22, and the stirring plate 2153 installed on the outside of the connecting long shaft 212 follows the rotation to stir the raw material, and while rotating and stirring, the torsion shaft 2152 applies elastic force to drive the stirring plate 2153 to swing elastically. Thereby, the raw materials are fully contacted and fully stirred and mixed. During the stirring and mixing process, the compression spring 1531 and the sleeve 1533 are used to apply a lateral elastic buffer to the outside of the stirring plate 2153 for the extrusion shaft 1532, ensuring that the scraper 1535 on the outside of the connecting plate 1534 can stably adhere to the inner wall of the tank body 21 for scraping, and the raw materials adhering to the inner wall of the tank body 21 are scraped off, thereby improving the effect of fully mixing the raw materials. Finally, after the stirring is completed, the scraper 1536 is used to scrape the lower end of the tank body 21 as the connecting plate 1534 rotates, ensuring that the mortar can be completely discharged into the secondary mixing tank 3 for secondary mixing and stirring through the spiral agitator 31.

[0033] A preferred technical solution is that the guide plate 211 is installed at an inclined angle and is connected to the feeding port 1, so that the raw materials inside the feeding port 1 can be fully inclined and guided to be discharged into the middle end of the tank body 21 to fully contact with the stirring mechanism 215, thereby preventing the raw materials from directly falling vertically into the tank body 21 from the feeding port 1 and being difficult to be fully stirred by the stirring mechanism 215;

[0034] A preferred technical solution is that three scraping strips 1535 are evenly distributed on the outside of the connecting plate 1534, and the inner wall of the connecting plate 1534 is an inclined surface, which can conduct the mortar downward, and the contact end of the scraping strip 1535 with the inner wall of the tank body 21 is a sharp angle type, ensuring that the raw materials adhering to the inner wall of the tank body 21 can be fully scraped off to avoid the raw materials from not being fully mixed;

[0035] A preferred technical solution is that there are two scrapers 1536 symmetrically installed at the lower ends of the two connecting plates 1534. The rotating connecting plates 1534 can drive the scrapers 1536 to scrape the lower end of the tank body 21 to ensure that the mortar is completely discharged into the secondary mixing tank 3 for secondary mixing after being stirred inside the tank body 21.

[0036] Utilizing the technical solution of the present invention, or those skilled in the art designing similar technical solutions inspired by the technical solution of the present invention to achieve the above-mentioned technical effects, all fall within the protection scope of the present invention.

Claims

1. A multi-stage mixing device for mortar mixing, the structure of which comprises a feeding port (1), a primary mixing tank (2), a secondary mixing tank (3), a supporting foot (4), and a discharge port (5), wherein the feeding port (1) is embedded in the upper right end of the primary mixing tank (2), a tank body (21) provided on the primary mixing tank (2) is established on the upper end of the secondary mixing tank (3) through a supporting foot, the secondary mixing tank (3) is welded with a supporting foot (4), and a discharge port (5) is embedded in the middle end of the bottom of the secondary mixing tank (3), characterized in that: A motor (22) is installed on the top of the tank body (21), and a connecting long shaft (212), an injection mechanism (213) and a compression mechanism (214) are installed inside the tank body (21), the motor (22) drives the top of the connecting long shaft (212) to rotate, and the connecting long shaft (212) is inserted into a diverter ring (2132) provided in the middle of the injection mechanism (213) by means of a clearance fit, and when the connecting long shaft (212) rotates, a ball (2133) provided on the inner wall of the diverter ring (2132) assists in sliding, and three air intake pipes (2131) are further provided on the outer side of the diverter ring (2132), one of which is connected to the compression mechanism (214); The inner wall of the air intake pipe (2131) is provided with a convex strip (1311), and the bottom of the air intake pipe (2131) is embedded with an air nozzle (1312), and the lower end of the air nozzle (1312) is connected to the opening and closing plate (1314) via a torsion spring shaft (1313); The compression mechanism (214) is composed of an air compressor (2141), a sleeve tube (2142), an air intake filter plate (2143), a buffer mechanism (2144) and a clamping sheet (2145); the air compressor (2141) is fitted and mounted on the upper left end of the outer side of the tank body (21); the sleeve tube (2142) arranged on the right side of the air compressor (2141) is sleeve-connected with the left end of one of the air intake pipes (2131) to compress air and enter the interior of the air intake pipe (2131); the air compressor (2141) filters the intake air through the air intake filter plate (2143) arranged on the left side; the buffer mechanism (2144) is fixedly mounted on the upper left end of the outer side of the tank body (21), and the air compressor (2141) is elastically clamped by the buffer mechanism (2144) and the clamping sheet (2145); The buffer mechanism (2144) comprises a fixed support plate (1441), an extrusion rod (1442), a telescopic hose (1443) and a conducting port (1444); the inner side of the fixed support plate (1441) is connected to the clamping piece (2145) via the extrusion rod (1442); an elastic force is applied to the inner connection between the extrusion rod (1442) and the fixed support plate (1441) via the telescopic hose (1443); and the conducting port (1444) is passed through the outer end of the telescopic hose (1443); A guide plate (211) and a stirring mechanism (215) are also provided inside the tank body (21). The guide plate (211) guides the raw materials to the middle end of the tank body (21) to contact the stirring mechanism (215). The stirring mechanism (215) is arranged outside the connecting long shaft (212) and is driven by the connecting long shaft (212) to rotate and stir.

2. A multi-stage mixing device for mortar mixing according to claim 1, characterized in that: The connecting short shaft (2151) provided on the stirring mechanism (215) is installed outside the connecting long shaft (212); the stirring plate (2153) provided on the stirring mechanism (215) and the torsion shaft (2152) provided at the connection between the connecting short shaft (2151) and the stirring plate (2153) exerts elastic force to drive the stirring plate (2153) to swing elastically; the needle punctures (2154) provided on the surface of the stirring plate (2153) can puncture excess bubbles generated when the raw materials are stirred inside the tank body (21).

3. A multi-stage mixing device for mortar mixing according to claim 2, characterized in that: The stirring plate (2153) is provided with a compression spring (1531), an extrusion shaft (1532), a shaft sleeve (1533), a connecting plate (1534), and a scraping strip (1535) at one end thereof close to the tank body (21). The compression spring (1531) and the shaft sleeve (1533) are used to apply a lateral elastic buffer to the extrusion shaft (1532) on the outer side of the stirring plate (2153). The connecting plate (1534) rotates synchronously with the stirring plate (2153) on the inner edge of the tank body (21). The rotating connecting plate (1534) drives the outer scraping strip (1535) to scrape the inner wall of the tank body (21).

4. A multi-stage mixing device for mortar mixing according to claim 3, characterized in that: A scraper (1536) is also provided at the lower end of the connecting plate (1534); the scraper (1536) is installed at an inclined angle and the bottom surface of the scraper (1536) abuts against the inclined end surface of the bottom of the tank body (21).