Mixing device for concrete admixture production

Abstract

The invention relates to the technical field of concrete admixture production equipment, and discloses a concrete admixture production mixing device which comprises a stirring box body and a box cover matched with the stirring box body, the side face and the lower end of the stirring box body are provided with a feeding port and a discharging port correspondingly, and the bottom in the stirring box body is rotationally connected with a hollow rotating shaft; a gap exists between the lower end of the rotating shaft and the inner bottom of the stirring box body, a bearing frame matched with the inner cavity of the stirring box body is fixedly installed on the side face of the rotating shaft, and stirring blades capable of adjusting the angle are arranged between the rotating shaft and the bearing frame. By arranging the material conveying auger and the rotating shaft, raw materials with heavy mass can be concentrated at the lower end of the rotating shaft, the materials at the lower end of the rotating shaft are driven to be conveyed to the upper end of the rotating shaft through rotation of the material conveying auger, the materials are mixed again through the stirring blades, and the layering phenomenon of the raw materials during mixing and stirring is prevented; the overall raw material mixing efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of concrete admixture production equipment, in particular to a mixing device for concrete admixture production. Background Art

[0002] Concrete admixtures refer to substances added to improve and adjust the performance of concrete. The application of concrete admixtures in engineering projects has received more and more attention. The addition of admixtures plays a certain role in improving the performance of concrete, but the selection, addition method and adaptability of admixtures will seriously affect their development. Concrete admixtures need to be mixed and processed during production.

[0003] In order to improve the mixing efficiency during the production of concrete admixtures, the prior art has made many improvements to the concrete admixture mixing device, such as the patent with the patent publication number CN214810478U, which discloses a uniform mixing device for concrete admixture production, including a support ring and a support leg, the upper surface of the support leg is fixedly connected with a box, the outer surface of the box is fixedly connected with a blower mechanism, the blower mechanism includes a fan, an air inlet pipe, and an air outlet pipe, the upper surface of the support ring is fixedly connected with a support rod, the front surface of the support rod is fixedly connected with a cross bar, and the lower surface of the cross bar is fixedly connected with a telescopic rod. This patent achieves pre-mixing of raw materials through the blower mechanism and the box by designing the blower mechanism, and the circular box enhances fluidity, and by designing the top cover and the shock-absorbing layer, it is achieved to avoid the box from generating small amplitude and high frequency vibration during the mixing of raw materials, and to avoid the stratification of the already mixed raw materials, and by designing the top cover and the telescopic rod, it is achieved to increase the convenience of cleaning the inside of the device while avoiding vibration.

[0004] The above patent has obvious beneficial effects, but still has the following shortcomings in actual operation:

[0005] In the prior art, such as the above-mentioned comparative documents, stirring blades are used to mix and stir the raw materials of concrete admixtures. It is necessary to stir and mix a variety of raw materials to make concrete admixtures. After the various raw materials are mixed and stirred in a mixing box, due to the different volumes and masses of the raw materials, the heavier raw materials will slowly slide to the bottom of the mixing box during stirring. Due to the different weights of the various raw materials, different raw materials will form stratification in the mixing box. The mixing efficiency of the raw materials in the upper and lower parts of the mixing box is quite different. It takes a long time to mix the raw materials in the mixing box. Therefore, the art is in urgent need of a mixing device for concrete admixture production to solve the defects of the prior art. Summary of the invention

[0006] In view of the deficiencies in the prior art, the present invention provides a mixing device for producing concrete admixtures, which prevents stratification of raw materials during mixing and stirring, and at the same time improves the efficiency of overall raw material mixing.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a mixing device for producing concrete admixtures, comprising a mixing box and a box cover adapted to the mixing box, wherein the side and lower end of the mixing box are respectively provided with a feed port and a discharge port, a hollow rotating shaft is rotatably connected to the bottom of the mixing box body, a gap exists between the lower end of the rotating shaft and the bottom of the mixing box body, a bearing frame adapted to the cavity in the mixing box body is fixedly mounted on the side of the rotating shaft, a mixing blade capable of adjusting an angle is arranged between the rotating shaft and the bearing frame, a feeding auger is penetrated inside the rotating shaft, a first driving motor for simultaneously driving the rotating shaft and the feeding auger to rotate is arranged inside the box cover, and when the feeding auger rotates, the raw materials in the bottom of the mixing box body are transported to the upper part of the mixing box body;

[0008] An installation unit for connection is provided between the box cover and the mixing box body, and an auxiliary unloading unit is provided at the discharge port and the lower end of the mixing box body, and the auxiliary unloading unit improves the discharge efficiency of the discharge port.

[0009] Preferably, a fixing plate is provided in the box cover, the first driving motor is fixedly installed in the box cover, the output end of the first driving motor is fixedly connected with a connecting shaft passing through the fixing plate, the upper end of the feeding auger is higher than the rotating shaft and is fixedly connected with the first polygonal shaft, the middle part of the lower end of the connecting shaft is provided with a first polygonal slot adapted to the first polygonal shaft, a plurality of plug-in rods are fixedly connected to the upper end of the rotating shaft, and a plurality of plug-in grooves adapted to the plug-in rods are provided at the lower end of the connecting shaft.

[0010] Preferably, a support unit is provided between the inner bottom of the mixing box body and the lower end of the rotating shaft, and the support unit includes symmetrical rotating rings, and a support rod is fixedly connected between the two rotating rings. The bottom of the mixing box body and the lower end of the rotating shaft are both provided with rotating grooves adapted to the rotating rings.

[0011] Preferably, polygonal through holes are formed at both ends of the stirring blade, a polygonal limiting shaft is passed through the through hole, limiting grooves adapted to the limiting shaft are formed on the sides of the rotating shaft and the supporting frame, a threaded hole connected to a limiting groove is formed on the side of the supporting frame away from the stirring blade, a limiting plug for limiting the limiting shaft is threadedly connected in the threaded hole, and a rotatable ball is embedded in the side of the limiting plug away from the limiting shaft.

[0012] Preferably, the auxiliary unloading unit includes a discharge bin fixedly connected to the upper end of the discharge port, the upper end of the discharge bin is fixedly connected with a symmetrical feed pipe connecting the discharge bin and the lower end of the mixing box, the side of the feed pipe and the side of the discharge port are provided with electromagnetic switches, the discharge bin is rotatably connected with a rotating shaft, the upper end of the rotating shaft extends into the mixing box and is provided with a second polygonal slot, the lower end of the feed auger is fixedly connected with a second polygonal shaft adapted to the second polygonal slot, the lower end of the rotating shaft extends into the discharge bin and is fixedly connected with a pushing blade on the side.

[0013] Preferably, the mounting unit includes an annular gear ring rotatably connected to the side of the box cover, an L-shaped clamping plate is fixedly connected to the lower side of the annular gear ring, a guide fixed block adapted to the clamping plate is fixedly connected to the upper side of the mixing box body, a second drive motor is fixedly connected to the side of the box cover, and a gear meshing with the annular gear ring is fixedly connected to the output end of the second drive motor.

[0014] Preferably, a supporting frame is fixedly connected to the side of the clamping plate, a limiting plate capable of engaging with the side of the guide fixed clamping block is slidably connected inside the supporting frame, a groove matching the limiting plate is penetrated through the side of the clamping plate, a guide column penetrating the supporting frame is fixedly connected to the side of the limiting plate, and an elastic member is sleeved on the side of the guide column.

[0015] Preferably, the side of the carrying frame is slidably connected to a sliding frame, the side of the sliding frame is penetrated by and threadedly connected with an adjusting bolt, one end of the adjusting bolt is rotatably connected to a moving plate adapted to the sliding frame, and the side of the adjusting bolt is threadedly connected to a limiting ring.

[0016] Preferably, sliding blocks are fixedly connected to the symmetrical ends of the sliding frame, and sliding grooves adapted to the sliding blocks are provided on the symmetrical sides of the carrying frame.

[0017] Preferably, a sealing ring is embedded between the lower end of the box cover and the upper end of the mixing box body.

[0018] In view of the deficiencies of the prior art, the present invention provides a mixing device for producing concrete admixtures, which overcomes the deficiencies of the prior art. The beneficial effects of the present invention are:

[0019] 1. In the present invention, by providing a feeding auger and a rotating shaft, the heavier raw materials will be concentrated at the lower end of the rotating shaft, and the rotation of the feeding auger drives the materials at the lower end of the rotating shaft to be transferred to the upper end of the rotating shaft, and the materials are mixed again by the stirring blades, thereby preventing the raw materials from stratifying during mixing and stirring, and at the same time, improving the overall raw material mixing efficiency;

[0020] 2. The present invention provides a rotating shaft and a feeding auger that are plug-connected, which facilitates the disassembly and maintenance of the rotating shaft and the feeding auger. At the same time, since concrete admixtures have different forms, feeding auger with different pitches can be replaced according to the different forms of raw materials, thereby improving the mixing efficiency of the raw materials;

[0021] 3. In the present invention, by providing a stirring blade with an adjustable angle, the angle of the stirring blade can be adjusted to be smaller when solid raw materials need to be mixed, because the resistance is larger when stirring solid raw materials. When stirring liquid raw materials, the angle of the stirring blade can be appropriately increased to increase the driving force of the stirring blade and improve the stirring efficiency;

[0022] 4. In the present invention, an auxiliary unloading unit is provided. After the raw materials are mixed, the first driving motor is started in reverse. The first driving motor drives the rotating shaft and the pushing blades to rotate through the feeding auger, so as to push the raw materials to be discharged quickly through the discharge port. At the same time, the discharge port is prevented from being blocked during discharge, thereby improving the discharge efficiency and thus improving the overall concrete admixture mixing efficiency.

[0023] 5. In the present invention, an installation unit is provided to facilitate the sealing installation between a larger box cover and a mixing box body. By starting the second drive motor, the second drive motor drives the gear and the annular gear ring to rotate, and the annular gear ring drives the clamping plate to clamp with the guide fixed clamping block, and drives the box cover to move toward the mixing box body for sealing connection.

[0024] Other features and advantages of the present invention will be described in the following description, and partly become obvious from the description, or be understood by implementing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0026] Figure 1 It is a schematic structural diagram of the overall cross-section of the present invention;

[0027] Figure 2 It is a schematic diagram of the overall structure of the present invention;

[0028] Figure 3 It is a schematic diagram of the structure of the rotating shaft and the supporting frame in the present invention;

[0029] Figure 4 It is a structural schematic diagram of the lower end of the feeding auger in the present invention;

[0030] Figure 5It is a structural schematic diagram of the upper end of the feeding auger in the present invention;

[0031] Figure 6 It is a structural schematic diagram of the limiting shaft in the present invention;

[0032] Figure 7 It is a schematic diagram of the structure of the clamping plate and the guide fixing block in the present invention;

[0033] Figure 8 for Figure 1 The enlarged structural diagram at A in the middle;

[0034] Fig. 9 for Figure 1 The enlarged structural diagram at B in the middle;

[0035] Fig.10 for Figure 1 The enlarged structural diagram at C in the middle;

[0036] Fig.11 for Figure 1 The enlarged structural diagram at D in the middle;

[0037] Fig.12 for Figure 3 Enlarged structural diagram at E in the middle.

[0038] In the figure: 1. mixing box; 2. box cover; 3. feed port; 4. discharge port; 5. rotating shaft; 6. bearing frame; 7. mixing blade; 8. feeding auger; 9. first driving motor; 10. mounting unit; 11. auxiliary unloading unit; 12. fixing plate; 13. connecting shaft; 14. first polygonal shaft; 15. first polygonal slot; 16. plug-in rod; 17. plug-in slot; 18. rotating ring; 19. rotating slot; 20. supporting rod; 21. limiting shaft; 22. through hole; 23. limiting slot; 24. threaded hole; 25. limiting plug; 26 , ball bearing; 27, discharge bin; 28, feed pipe; 29, rotating shaft; 30, second polygonal shaft; 31, second polygonal slot; 32, push blade; 33, electromagnetic switch; 34, clamping plate; 35, guide fixing block; 36, second drive motor; 37, annular gear ring; 38, bearing frame; 39, clearance groove; 40, limit plate; 41, guide column; 42, elastic member; 43, sliding frame; 44, adjusting bolt; 45, moving plate; 46, limit ring; 47, sliding block; 48, sliding groove; 49, sealing ring; 50, gear. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0040] Embodiment 1

[0041] See also Figure 1 - Fig.12 A mixing device for producing concrete admixtures comprises a mixing box 1 and a box cover 2 adapted to the mixing box 1, a feeding port 3 and a discharging port 4 are respectively arranged on the side and the lower end of the mixing box 1, a hollow rotating shaft 5 is rotatably connected to the bottom of the mixing box 1, a gap exists between the lower end of the rotating shaft 5 and the bottom of the mixing box 1, a bearing frame 6 adapted to the cavity in the mixing box 1 is fixedly mounted on the side of the rotating shaft 5, a mixing blade 7 capable of adjusting the angle is arranged between the rotating shaft 5 and the bearing frame 6, a feeding auger 8 is penetrated inside the rotating shaft 5, a first driving motor 9 for driving the rotating shaft 5 and the feeding auger 8 to rotate at the same time is arranged in the box cover 2, and the feeding auger 8 transports the raw materials at the bottom of the mixing box 1 to the upper part of the mixing box 1 when it rotates; a fixing plate is arranged in the box cover 2 12, the first drive motor 9 is fixedly installed in the box cover 2, and the output end of the first drive motor 9 is fixedly connected with a connecting shaft 13 that penetrates the fixed plate 12, the upper end of the feeding auger 8 is higher than the rotating shaft 5 and is fixedly connected with the first polygonal shaft 14, and the middle part of the lower end of the connecting shaft 13 is provided with a first polygonal slot 15 that is adapted to the first polygonal shaft 14, and the upper end of the rotating shaft 5 is fixedly connected with a plurality of plug-in rods 16, and the lower end of the connecting shaft 13 is provided with a plurality of plug-in slots 17 that are adapted to the plug-in rods 16; a support unit is provided between the bottom of the mixing box 1 and the lower end of the rotating shaft 5, and the support unit includes symmetrical rotating rings 18, and a support rod 20 is fixedly connected between the two rotating rings 18, and a rotating groove 19 that is adapted to the rotating ring 18 is provided at the bottom of the mixing box 1 and the lower end of the rotating shaft 5;

[0042] Specific implementation method in this embodiment: when the concrete admixture is produced, when several kinds of raw materials need to be mixed, the several kinds of raw materials are input into the mixing box 1 through multiple feed ports 3, the first drive motor 9 is started, and the output end of the first drive motor 9 drives the connecting shaft 13 to rotate, the connecting shaft 13 drives the feeding auger 8 and the rotating shaft 5 to rotate simultaneously through the first polygonal shaft 14 and the plug-in rod 16, the rotating shaft 5 drives the carrier frame 6 and the mixing blade 7 to rotate, and the various raw materials in the mixing box 1 are mixed and stirred by the mixing blade 7;

[0043] The heavier raw material particles will settle down in the mixing box 1 under the high-speed mixing state. Since the lower cavity of the mixing box 1 is wide at the top and narrow at the bottom, the heavier raw materials will be concentrated at the lower end of the rotating shaft 5, and the rotating shaft 5 is supported and rotatable by the rotating ring 18 and the support rod 20. The raw materials are accumulated on the side of the feeding auger 8. The rotation of the feeding auger 8 drives the material at the lower end of the rotating shaft 5 to be transferred to the upper end of the rotating shaft 5, and falls back to the upper part of the mixing box 1 through the spacing between the plug-in rods 16, and is mixed again by the mixing blades 7, so as to prevent the raw materials from being stratified during mixing and stirring, and at the same time, improve the overall raw material mixing efficiency;

[0044] One side of the support frame 6 abuts against the inner wall of the mixing box 1, and the side of the support frame 6 is chamfered to prevent the raw materials from sticking to the inner wall of the mixing box 1 during mixing. At the same time, if it is necessary to clean the mixing box 1, the cleaning liquid is input through the feed port 3, and the inner wall of the mixing box 1 is quickly cleaned through the support frame 6;

[0045] It should be noted that the lower end of the rotating shaft 5 is supported by a rotating ring 18 and a support rod 20, wherein the rotating ring 18 includes but is not limited to a thrust roller bearing. The rotating ring 18 is clamped in the rotating groove 19 to support the rotating shaft 5 and enable it to rotate. The rotating shaft 5 and the upper end of the feed auger 8 are connected by plug-in, and the rotating shaft 5 and the feed auger 8 can be disassembled and maintained. At the same time, since concrete admixtures have different forms, the feed auger 8 with different pitches can be replaced according to the different forms of the raw materials to improve the mixing efficiency of the raw materials. It is worth noting that all the plug-in positions in this embodiment are provided with seals, and the existing well-known technology in the field can achieve the sealing effect, which will not be elaborated here.

[0046] Embodiment 2

[0047] See also Figure 3 , Figure 4 , Figure 6 and Fig.10 , this embodiment includes the above embodiment, wherein it further includes: polygonal through holes 22 are formed through both ends of the stirring blade 7, a polygonal limiting shaft 21 is formed through the through holes 22, limiting grooves 23 adapted to the limiting shaft 21 are formed on the sides of the rotating shaft 5 and the supporting frame 6, a threaded hole 24 connected to a limiting groove 23 is formed on the side of the supporting frame 6 away from the stirring blade 7, a limiting plug 25 for limiting the limiting shaft 21 is threadedly connected in the threaded hole 24, and a rotatable ball 26 is embedded on the side of the limiting plug 25 away from the limiting shaft 21;

[0048] Specific implementation method in this embodiment: Since concrete admixtures have multiple forms such as solid and liquid, the angle of the stirring blade 7 can be adjusted to be smaller when solid raw materials need to be mixed. Because the resistance is large when stirring solid raw materials, if the angle of the stirring blade 7 is too large, it will cause the deformation of the stirring blade 7 and increase the power consumption of the first drive motor 9. When stirring liquid raw materials, the angle of the stirring blade 7 can be appropriately increased to increase the driving force of the stirring blade 7 and improve the stirring efficiency. In addition, when different forms of raw materials need to be mixed and stirred, it is necessary to replace the feeding auger 8 with different pitches to ensure that the feeding auger 8 can transport the raw materials in the lower part of the mixing box body 1 to the upper part of the mixing box body 1;

[0049] When the angle of the stirring blade 7 needs to be adjusted, the box cover 2 is opened and the hanging device is used to hang the rotating shaft 5 and the supporting frame 6 out of the stirring box body 1, the limiting plug 25 is screwed down, and the limiting shaft 21 is pulled out. Since the limiting shaft 21, the through hole 22 and the limiting groove 23 are polygonal, they have a limiting effect on the stirring blade 7. The angle of the stirring blade 7 is adjusted, and the through hole 22 is aligned with the position of the limiting groove 23 at the same time, the limiting shaft 21 is inserted, and the limiting plug 25 is screwed. The function of the ball 26 is to prevent the limiting plug 25 from being dislocated. Direct contact with the inner wall of the mixing box 1 causes wear, making it difficult to disassemble later. The side wall of the ball 26 rolls closely against the inner wall of the mixing box 1 to reduce friction. It is worth noting that when processing additives in each form (such as solid and liquid), the production products will not be switched at will. Basically, it is only necessary to adjust the angle of the mixing blade 7 when installing the mixing box 1. For example: one batch of mixing boxes 1 is used to mix solid additives, and another batch of mixing boxes 1 is used to mix liquid additives.

[0050] Embodiment 3

[0051] See also Figure 1 - Figure 4 , Fig.11 and Fig.12 , this embodiment includes all the above embodiments, wherein the auxiliary unloading unit 11 includes a discharge bin 27 fixedly connected to the upper end of the discharge port 4, a symmetrical feed pipe 28 connecting the discharge bin 27 and the lower end of the mixing box 1 is fixedly connected to the upper end of the discharge bin 27, and an electromagnetic switch 33 is provided on the side of the feed pipe 28 and the side of the discharge port 4, a rotating shaft 29 is rotatably connected to the discharge bin 27, the upper end of the rotating shaft 29 extends into the mixing box 1 and is provided with a second polygonal slot 31, a second polygonal shaft 30 adapted to the second polygonal slot 31 is fixedly connected to the lower end of the feed auger 8, the lower end of the rotating shaft 29 extends into the discharge bin 27 and a pusher blade 32 is fixedly connected to the side;

[0052] Specific implementation method in this embodiment: when it is necessary to unload the raw materials that have been mixed in the mixing box 1, open the electromagnetic switch 33 on the feed pipe 28 and the discharge port 4, and the mixed raw materials flow into the discharge bin 27 through the feed pipe 28. At the same time, the first drive motor 9 rotates in the opposite direction, and then the feed auger 8 rotates in the opposite direction. The lower end of the feed auger 8 is inserted into the second polygonal slot 31 through the second polygonal shaft 30, driving the rotating shaft 29 to rotate, and the rotating shaft 29 drives the pushing blade 32 to rotate, pushing the raw materials to be discharged quickly through the discharge port 4, and also preventing the discharge port 4 from being blocked during discharge, thereby improving the discharge efficiency and thus improving the overall concrete admixture mixing efficiency.

[0053] Embodiment 4

[0054] See also Figure 1 , Figure 2 , Figure 7 and Figure 8 , this embodiment includes all the above embodiments, which also includes: the installation unit 10 includes an annular gear ring 37 rotatably connected to the side of the box cover 2, the lower side of the annular gear ring 37 is fixedly connected to an L-shaped clamping plate 34, the upper end side of the mixing box body 1 is fixedly connected to a guide fixed clamping block 35 adapted to the clamping plate 34, the side of the box cover 2 is fixedly connected to a second drive motor 36, and the output end of the second drive motor 36 is fixedly connected to a gear 50 meshing with the annular gear ring 37; a bearing frame 38 is fixedly connected to the side of the clamping plate 34, and a limit plate 40 that can mesh with the side of the guide fixed clamping block 35 is slidably connected in the bearing frame 38, and a side of the clamping plate 34 is penetrated and opened A clearance groove 39 adapted to the limit plate 40, a guide column 41 penetrating the bearing frame 38 is fixedly connected to the side of the limit plate 40, and an elastic member 42 is sleeved on the side of the guide column 41; a sliding frame 43 is slidably connected to the side of the bearing frame 38, and an adjusting bolt 44 is penetrated and threadedly connected to the side of the sliding frame 43, and one end of the adjusting bolt 44 is rotatably connected to a moving plate 45 adapted to the inside of the sliding frame 43, and a limiting ring 46 is threadedly connected to the side of the adjusting bolt 44; sliding blocks 47 are fixedly connected to the sliding frame 43 at both symmetrical ends, and sliding grooves 48 adapted to the sliding blocks 47 are opened on the symmetrical sides of the bearing frame 38; a sealing ring 49 is embedded between the lower end of the box cover 2 and the upper end of the mixing box body 1;

[0055] Specific implementation of this embodiment: When mixing the liquid concrete admixture raw materials, the sealing of the box cover 2 is more critical. In reality, since the box cover 2 and the mixing box body 1 are both large in size and weight, the connection between the common box cover 2 and the mixing box body 1 is more complicated, and the simple connection method has poor sealing performance;

[0056] When it is necessary to connect the box cover 2 and the upper end of the mixing box body 1, the box cover 2 is lifted and the position of the connecting shaft 13 is controlled to be adapted to the upper end of the rotating shaft 5 and the feeding auger 8 by using the sling. The box cover 2 is dropped on the upper end of the mixing box body 1 by the sling, and the second drive motor 36 is started. The output end of the second drive motor 36 drives the gear 50 to rotate, and the gear 50 drives the annular gear ring 37 to rotate. The annular gear ring 37 drives the clamping plate 34 to rotate. The clamping plate 34 moves to contact the guide fixed block 35. One end of the guide fixed block 35 is wedge-shaped. When the side surface of the clamping plate 34 slides on the guide fixed block 35, the clamping plate 34 will move downward, and the clamping plate 34 will drive the box cover 2 to move downward at the same time. When the box cover 2 moves downward, the sealing ring 49 is squeezed to seal the box cover 2 and the mixing box body 1.

[0057] When the box cover 2 and the mixing box body 1 are sealed and installed, the clamping plate 34 will drive the limit plate 40 to move along the guide fixed block 35. At this time, the limit plate 40 is affected by the tooth groove on the guide fixed block 35. At the same time, the limit plate 40 is cooperated by the guide column 41 and the elastic member 42. The limit plate 40 moves in the bearing frame 38 and the yield groove 39. When the second drive motor 36 stops, the elastic member 42 pushes the limit plate 40 to be clamped on the side of the guide fixed block 35 for temporary limiting. When the box cover 2 is completely sealed, it moves in the sliding groove 48 through the sliding block 47. Slide the sliding frame 43 to the position of the guide column 41. When the box cover 2 is not completely sealed, the sliding block 47 slides in the sliding groove 48 to move the sliding frame 43 away from the guide column 41. The sliding frame 43 will not block the movement of the guide column 41. The adjusting bolt 44 is rotated to push the moving plate 45 to squeeze the guide column 41 through the adjusting bolt 44 to limit the position of the limiting plate 40. The limiting ring 46 is tightened to limit the position of the adjusting bolt 44. The second drive motor 36 can be turned off to improve the stability of the box cover 2 and the mixing box body 1 after the sealing connection;

[0058] It is worth mentioning that, in fact, most ordinary synchronous motors will not self-lock after power is off, and will self-lock after power is on (unless a brake device is added separately). The above-mentioned box cover 2 needs to remain sealed at all times, and the box cover 2 is not often opened in actual production. Therefore, it is necessary to keep the second drive motor 36 powered on all the time, which will waste certain resources. Therefore, the position of the guide fixing block 35 is fixed by the above-mentioned adjusting bolt 44, limit plate 40 and other structures, so as to disconnect the power supply of the second drive motor 36 and save certain resources.

[0059] Among them, the first drive motor 9 and the second drive motor 36 mentioned above can be purchased on the market. They are mature technologies and have been fully disclosed, so they are not repeated in the specification. The first drive motor 9 and the second drive motor 36 are both equipped with power connection lines, and they are electrically connected to the external main controller and 220V phase voltage (or 380V line voltage) through the power lines, and the main controller can be a conventional known device such as a computer that plays a control role.

[0060] Finally, it should be noted that in the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0061] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0062] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A mixing device for producing concrete admixtures, comprising a mixing box (1) and a box cover (2) adapted to the mixing box (1), wherein the mixing box (1) is provided with a feed inlet (3) and a discharge outlet (4) on the side and the lower end thereof, respectively, and characterized in that: The bottom of the mixing box (1) is rotatably connected to a hollow rotating shaft (5), a gap is present between the lower end of the rotating shaft (5) and the bottom of the mixing box (1), a support frame (6) adapted to the cavity in the mixing box (1) is fixedly mounted on the side of the rotating shaft (5), a stirring blade (7) capable of adjusting the angle is provided between the rotating shaft (5) and the support frame (6), a feeding auger (8) is provided inside the rotating shaft (5), a first driving motor (9) for driving the rotating shaft (5) and the feeding auger (8) to rotate simultaneously is provided inside the box cover (2), and when the feeding auger (8) rotates, the raw materials at the bottom of the mixing box (1) are transported to the upper part of the mixing box (1); An installation unit (10) for connection is provided between the box cover (2) and the mixing box body (1), and an auxiliary unloading unit (11) is provided between the discharge port (4) and the lower end of the mixing box body (1).

2. The mixing device for concrete admixture production according to claim 1, characterized in that: A fixing plate (12) is provided inside the box cover (2), the first drive motor (9) is fixedly installed inside the box cover (2), the output end of the first drive motor (9) is fixedly connected to a connecting shaft (13) penetrating the fixing plate (12), the upper end of the feed auger (8) is higher than the rotating shaft (5) and is fixedly connected to a first polygonal shaft (14), a first polygonal slot (15) adapted to the first polygonal shaft (14) is provided in the middle of the lower end of the connecting shaft (13), a plurality of plug-in rods (16) are fixedly connected to the upper end of the rotating shaft (5), and a plurality of plug-in slots (17) adapted to the plug-in rods (16) are provided at the lower end of the connecting shaft (13).

3. The mixing device for concrete admixture production according to claim 1, characterized in that: A support unit is provided between the bottom of the mixing box (1) and the lower end of the rotating shaft (5), the support unit comprising symmetrical rotating rings (18), a support rod (20) being fixedly connected between the two rotating rings (18), and a rotating groove (19) adapted to the rotating ring (18) is provided on the bottom of the mixing box (1) and the lower end of the rotating shaft (5).

4. The mixing device for producing concrete admixture according to claim 1, characterized in that: The two ends of the stirring blade (7) are penetrated by a polygonal through hole (22), a polygonal limiting shaft (21) is penetrated in the through hole (22), the side surfaces of the rotating shaft (5) and the supporting frame (6) are both provided with limiting grooves (23) adapted to the limiting shaft (21), the side surface of the supporting frame (6) away from the stirring blade (7) is provided with a threaded hole (24) connected with a limiting groove (23), the threaded hole (24) is internally threadedly connected with a limiting plug (25) for limiting the limiting shaft (21), and a rotating ball (26) is embedded in the side surface of the limiting plug (25) away from the limiting shaft (21).

5. The mixing device for concrete admixture production according to claim 1, characterized in that: The auxiliary unloading unit (11) comprises a discharge bin (27) fixedly connected to the upper end of the discharge port (4); the upper end of the discharge bin (27) is fixedly connected to a symmetrical feed pipe (28) which communicates with the discharge bin (27) and the lower end of the mixing box (1); electromagnetic switches (33) are provided on the side of the feed pipe (28) and the side of the discharge port (4); a rotating shaft (29) is rotatably connected to the discharge bin (27); the upper end of the rotating shaft (29) extends into the mixing box (1) and is provided with a second polygonal slot (31); the lower end of the feed auger (8) is fixedly connected to a second polygonal shaft (30) adapted to the second polygonal slot (31); the lower end of the rotating shaft (29) extends into the discharge bin (27) and is fixedly connected to a pusher blade (32) on the side.

6. The mixing device for producing concrete admixture according to claim 1, characterized in that: The mounting unit (10) comprises an annular gear ring (37) rotatably connected to the side of the box cover (2); an L-shaped clamping plate (34) is fixedly connected to the lower side of the annular gear ring (37); a guide fixing clamping block (35) adapted to the clamping plate (34) is fixedly connected to the upper side of the stirring box body (1); a second drive motor (36) is fixedly connected to the side of the box cover (2); and a gear (50) meshing with the annular gear ring (37) is fixedly connected to the output end of the second drive motor (36).

7. The mixing device for producing concrete admixture according to claim 6, characterized in that: The side of the clamping plate (34) is fixedly connected to a carrying frame (38), and a limiting plate (40) is slidably connected inside the carrying frame (38) and is engaged with the side of the guide fixed clamping block (35). The side of the clamping plate (34) is penetrated by a clearance groove (39) adapted to the limiting plate (40), and the side of the limiting plate (40) is fixedly connected to a guide column (41) penetrating the carrying frame (38), and the side of the guide column (41) is sleeved with an elastic member (42).

8. The mixing device for producing concrete admixture according to claim 7, characterized in that: The side of the carrying frame (38) is slidably connected to a sliding frame (43), and an adjusting bolt (44) is passed through and threadedly connected to the side of the sliding frame (43). One end of the adjusting bolt (44) is rotatably connected to a moving plate (45) adapted to the inside of the sliding frame (43), and the side of the adjusting bolt (44) is threadedly connected to a limiting ring (46).

9. The mixing device for producing concrete admixture according to claim 8, characterized in that: The sliding frame (43) has sliding blocks (47) fixedly connected at both ends thereof, and the bearing frame (38) has sliding grooves (48) adapted to the sliding blocks (47) formed on the symmetrical sides thereof.

10. A mixing device for producing concrete admixture according to claim 1, characterized in that: A sealing ring (49) is embedded between the lower end of the box cover (2) and the upper end of the stirring box body (1).

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