CN118493615B - A double-shaft concrete mixing main machine - Google Patents

Abstract

The invention discloses a double-shaft concrete stirring main machine, which relates to the technical field of concrete treatment and comprises a storage vessel for bearing concrete, two rotating shaft assemblies respectively arranged at two sides of the interior of the storage vessel and a driving source arranged at one end of the exterior of the storage vessel, wherein the same ends of the two rotating shaft assemblies are respectively fixed with mutually meshed transmission assemblies after penetrating through one end of the storage vessel. According to the invention, through adjusting the angle of the stirring blade, the stirring blade can better interact and collide with the mixture, so that the shearing force and the extrusion force of the stirring blade on the mixture are increased, the uniformity and the quality of concrete are improved, in addition, the stirring blade can be adjusted according to the needs through the variable angle design, the stirring blade is suitable for stirring requirements of different materials and proportions, and the quality and the stability of the concrete are ensured.

Description

A double-shaft concrete mixing main machine

Technical Field

The invention relates to the technical field of concrete processing, in particular to a double-shaft concrete mixing main machine.

Background Art

A concrete mixer is a machine that mixes cement, sand and gravel aggregates and water to make a concrete mixture. In order to obtain a better mixing effect, a double-shaft concrete mixer has emerged, in which the two shafts mix at the same time.

After searching, the Chinese utility model patent with authorization announcement number "CN217729178U" discloses "a double-shaft concrete mixer". In actual use, the patent drives the water pipe to slide through the driving member, so that the water in the water pipe flows to various positions of the mixing drum, which is conducive to uniform water supply and improves the mixing effect of the material. In addition, the Chinese utility model patent with authorization announcement number "CN209580034U" also discloses "a double-shaft concrete mixer". In actual use, the patent improves the cleaning and maintenance efficiency of the double-shaft concrete by improving the U-shaped pipe in the machine.

However, the above two patents have the following problems when actually processing concrete:

First, when the concrete is mixed, the concrete in the above two mixing main units is mixed, because the stirring angle of the internal stirring shaft is not adjustable, so the raw materials are mixed at a slower speed at a single stirring angle, which is not conducive to increasing the shear force and extrusion force of the mixture.

Second, the two main mixing machines mentioned above cannot transport the concrete over a certain distance when mixing the concrete, so that the mixed concrete needs to be transported with additional equipment, which reduces the construction efficiency to a certain extent.

Therefore, the applicant proposes a novel double-shaft concrete mixing main machine based on the above two points.

Summary of the invention

The purpose of the present invention is to provide a double-shaft concrete mixing main machine to solve the problems raised in the above background technology.

To achieve the above-mentioned object, the present invention provides the following technical solution: a double-shaft concrete mixing main machine, comprising: a material storage dish for carrying concrete, two rotating shaft assemblies respectively installed on both sides of the material storage dish, and a driving source arranged at one end outside the material storage dish, wherein the same ends of the two rotating shaft assemblies are respectively fixed with mutually meshing transmission assemblies after passing through one end of the material storage dish;

A removable cover is installed at one end of the top of the storage dish, the end of the dish mouth away from the cover is a feed port, and a discharge channel is installed at one end of the bottom of the storage dish close to the cover;

The rotating shaft assembly comprises: a sleeve installed on one side of the inner part of the material storage dish, the mouth end of the sleeve penetrates the material storage dish and is fixed to the outer part of the transmission assembly, and a plurality of groups of sliding notches are opened on the outer part of the sleeve, one group of sliding notches is divided into two, and the two sliding notches are respectively arranged at two relative positions on the outer surface of the sleeve;

A spiral blade is fixed on the outside of the sleeve, and there is at most one set of sliding notches at the gap between the spiral blades;

A connecting rod is arranged inside the sleeve, one end of which is connected to the inside of the transmission assembly, and an adjusting component whose number matches the number of sliding notches is installed outside the connecting rod. A plurality of sets of sleeve rods whose number matches the number of the adjusting components are fixed on the outer surface of the spiral blade, and each set of sleeve rods is divided into two.

The adjusting component comprises: a rotating block matched with the sleeve, the interior of the rotating block is rotatably connected with the outer wall of the connecting rod, two relative positions at one end of the outer side of the rotating block are respectively fixed with rotating shafts matched with the sliding notch, the top of the rotating shaft is exposed outside the sleeve and is equipped with a rotatable stirring blade, the back of the stirring blade is provided with an adjusting groove, and the adjusting groove is matched with the sleeve rod;

The operation of the driving source causes one of the transmission components to rotate, and the transmission component rotates to cause the sleeve to rotate, causing the connecting rod to perform piston motion in the sleeve.

Furthermore, a shaft seat is fixed to one end of the outside of the material storage dish away from the driving source, and a plug-in shaft passing through the material storage dish is fixed to one end of the bottom of the sleeve, and the shaft body of the plug-in shaft is rotatably connected to the inside of the shaft seat.

Furthermore, the driving source is a driving motor, and a motor seat is installed at the bottom of the driving motor.

Furthermore, carrying sleeves are installed on both sides of the outside of the material storage vessel near one end of the driving motor, and a carrying ring is installed on the top of the carrying sleeve;

The transmission assembly comprises: a cover sleeve seat, the bottom end of the cover sleeve seat is sleeved inside the carrying ring and is rotatably connected to the carrying ring, and the bottom end of the cover sleeve seat is fixed to the mouth end of the sleeve;

A connecting arm is fixed to the middle end of the outer portion of the cover seat, a toothed disc is fixed to the top of the connecting arm, an adjusting sleeve is arranged on the top of the toothed disc, and the outer portion of the adjusting sleeve is rotatably connected to a stable seat installed on the top of the motor seat; a pin opening is provided at the center point of the top of the toothed disc, and a sliding latch is slidably connected to the inner portion of the adjusting sleeve, and the sliding latch is adapted to the pin opening;

A screw cover is installed at one end of the sliding pin, and the screw cover is screwed to the connecting rod. A connecting tube is slidably connected to the top of the sliding pin, and one end of the connecting tube is fixed to the output end of the driving motor. A transmission ring seat is fixed to the middle end of the outside of the sliding pin, and a plurality of guide pins are fixed to the outside of the transmission ring seat. A guide groove is provided on the inner wall of the adjustment sleeve, and the guide groove and the guide pin are adapted to each other.

Furthermore, the cover sleeve seat is in a funnel structure, and a thread is formed on the outside of one end of the connecting rod passing through the cover sleeve seat.

Furthermore, a side plate is fixed to one side of the motor seat near the material storage dish, two extension frames are fixed outside the side plate, and the bottoms of the two stabilizing seats are respectively fixed to the tops of the two extension frames.

Furthermore, a control panel is fixed to one side of the exterior of the material storage vessel, and the control panel and the driving motor are electrically connected.

Furthermore, the connecting arms are provided with a plurality of connecting arms, and the plurality of connecting arms are evenly and equidistantly distributed at the middle end of the exterior of the cover sleeve seat.

The dual-shaft concrete mixer, by designing the mixing shaft into a rotating shaft assembly and an adjusting component, enables the rotating block inside the sleeve to reciprocate inside the sleeve during the sleeve rotation process when the device is actually used, and in the reciprocating process, with the help of the sliding notch and the spiral blade fixed outside the sleeve for mixing and transporting the concrete slurry, the mixing blade outside the rotating block rotates under the action of its own notch, thereby realizing the change of the mixing angle of the shaft body inside the mixing main machine, so that the device has the following advantages when actually used:

First, by adjusting the angle of the stirring blade, the stirring blade can better interact and collide with the mixture, thereby increasing the shear force and extrusion force of the stirring blade on the mixture, improving the uniformity and quality of the concrete. In addition, the variable angle design allows the stirring blade to be adjusted as needed to adapt to the mixing requirements of different materials and proportions, ensuring the quality and stability of the concrete.

Secondly, a coiled spiral blade is installed on the outside of the sleeve, so that the overall structure of the sleeve is similar to that of the auger shaft. Combined with the arrangement of two toothed discs of the same specifications on the double-shaft mixing main unit that mesh with each other, the two sleeves rotate in opposite directions at the same speed. During the mixing process, not only can the concrete in the storage dish be stirred, but the processed concrete can also be automatically discharged into the discharge channel of the storage dish during the mixing process, thereby improving the production efficiency to a certain extent and facilitating the transportation and use of concrete.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 is an isometric view of the present invention;

Fig. 2 is a left and right isometric view of the present invention;

FIG3 is an assembly diagram of a drive motor of the present invention;

FIG4 is a structural diagram of a transmission assembly of the present invention;

FIG5 is a structural diagram of a rotating shaft assembly according to the present invention;

FIG6 is a partial enlarged view of portion A in FIG5 ;

FIG7 is an external assembly diagram of the connecting rod of the present invention;

FIG8 is a structural diagram of the adjustment assembly of the present invention;

FIG. 9 is a back structural diagram of the stirring blade in the present invention.

In the figure: 1, storage dish; 2, discharge channel; 3, control panel; 4, drive motor; 5, transmission assembly; 501, connecting tube; 502, transmission ring seat; 503, guide pin; 504, sliding latch; 505, screw cover; 506, adjustment sleeve; 507, stable seat; 508, guide slide; 509, pin mouth; 510, toothed disc; 511, connecting arm; 512, cover sleeve seat; 6, rotating shaft assembly; 601, sleeve; 602, hollow 1. The opening of the screw shaft is 603, and the spiral blade is 604. The plug-in shaft is 605. The sliding notch is 606. The sleeve rod is 7. The cover plate is 8. The bearing foot is 9. The shaft seat is 10. The carrying sleeve is 11. The carrying ring is 12. The screw rod is 13. The motor seat is 14. The extension frame is 15. The side plate is 16. The adjustment component is 1601. The rotating block is 1602. The through opening is 1603. The rotating shaft is 1604. The stirring blade is 1605. The adjustment groove is 17. The connecting rod is 18.

DETAILED DESCRIPTION

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.

A twin-shaft concrete mixer is a commonly used construction equipment used to mix concrete, mortar and other construction materials. It is usually composed of two horizontal shafts rotating relative to each other, each shaft being provided with a stirring arm, through which the materials can be fully and evenly stirred. In actual use, the twin-shaft concrete mixer proposed in this application is not suitable for stirring too much concrete raw materials because its internal linkage components are operated through a trough body.

In addition, in the present application, the inner wall of the sleeve 601 is coated with grease, so in actual use, when the rotating block 1601 moves in the sleeve 601, the wear of the rotating block 1601 and the sleeve 601 can be reduced, and the smoothness of the movement of the rotating block 1601 is improved.

As shown in Figures 1 to 9, the present invention provides a technical solution: a double-axis concrete mixing main machine, comprising: a storage dish 1 for carrying concrete, two rotating shaft assemblies 6 respectively installed on both sides of the storage dish 1, and a driving source arranged at one end outside the storage dish 1, the same ends of the two rotating shaft assemblies 6 are respectively fixed with mutually meshing transmission assemblies 5 after passing through one end of the storage dish 1, a removable cover plate 7 is installed at one end of the top of the storage dish 1 at the dish mouth, the end of the dish mouth away from the cover plate 7 is a feed port, and a discharge channel 2 is installed at one end of the bottom of the storage dish 1 close to the cover plate 7. Referring to Figures 1 and 2, it can be seen that in the present application, a plurality of supporting feet 8 are fixed to the bottom of the storage dish 1 for support.

Referring to Figure 5, it can be seen that in the present application, the shaft assembly 6 includes: a sleeve 601 installed on one side of the interior of the material storage dish 1, the barrel end of the sleeve 601 passes through the material storage dish 1 and is fixed to the outside of the transmission assembly 5, and a plurality of groups of sliding notches 605 are opened on the outside of the sleeve 601, and a group of sliding notches 605 are divided into two, and the two sliding notches 605 are respectively arranged at two relative positions on the outer surface of the sleeve 601. In addition, referring to Figure 5, it can be seen that a spiral blade 603 is fixed on the outside of the sleeve 601, and there is at most one group of sliding notches 605 at the gap of the spiral blade 603.

It should also be noted that, referring to Figure 5, it can be seen that when the present device is actually used, a hollow opening 602 can be provided on the outer surface of the sleeve 601 at each gap of the spiral blade 603. The design of the hollow opening 602 enables the sleeve 601 to process slurry concrete. When the rotating block 1601 moves, the slurry concrete can flow into the interior of the sleeve 601 from the sliding notch 605 and can also flow out from the hollow opening 602.

It should also be noted that, referring to Figure 8, it can be seen that in the present application, the appearance structure of the rotating block 1601 is limited to a cylindrical structure. Since the outer wall of the rotating block 1601 with a cylindrical structure can fully contact the inner wall of the sleeve 601 when the device is actually used, the rotating block 1601 is set to a cylindrical structure to be more stable than other structures. In addition, it should be added that in the present application, the positions of the two rotating shafts 1603 are not fixed. When the adjusting component 16 is actually prepared, the actual rotation amplitude of the mixing blade 1604 can be increased or the slurry concrete can be prevented from flowing into the interior of the sleeve 601 from the sliding notch 605 by staggering the two rotating shafts 1603 in relative positions, or synchronously setting them at the middle end of the rotating block 1601.

Referring to Figures 5 and 7, it can be seen that in the present application, a connecting rod 17 is provided inside the sleeve 601, one end of the connecting rod 17 is connected to the inside of the transmission assembly 5, and an adjusting component 16 whose number matches the number of sliding notches 605 is installed on the outside of the connecting rod 17. A plurality of groups of sleeve rods 606 whose number matches the adjusting component 16 are fixed to the outer surface of the spiral blade 603, and each group of sleeve rods 606 is divided into two.

With reference to Figures 8 and 9, it can be seen that in the present application, the adjusting component 16 includes: a rotating block 1601 adapted to the sleeve 601, a through hole 1602 is provided inside the rotating block 1601, the rotating block 1601 is rotatably connected to the outer wall of the connecting rod 17 by means of the through hole 1602, and two relative positions at one end of the outer side of the rotating block 1601 are respectively fixed with a rotating shaft 1603 adapted to the sliding notch 605, the top of the rotating shaft 1603 is exposed outside the sleeve 601, and a rotatable stirring blade 1604 is installed, and an adjusting groove 1605 is provided on the back of the stirring blade 1604, and the adjusting groove 1605 is adapted to the sleeve rod 606. It should be noted that the operation of the driving source will cause one of the transmission components 5 to rotate, and the rotation of the transmission component 5 not only causes the sleeve 601 to rotate, but also causes the connecting rod 17 to perform piston motion in the sleeve 601.

Referring to Figure 1, it can be seen that in the present application, a shaft seat 9 is fixed to the end of the outside of the material storage dish 1 away from the driving source, and a plug-in shaft 604 that penetrates the material storage dish 1 is fixed to one end of the bottom of the sleeve 601, and the shaft body of the plug-in shaft 604 is rotatably connected to the inside of the shaft seat 9. It should be noted that, in addition, the shaft seat 9 in the present application is a bearing seat with rings fixed at both ends of the top, wherein the rings and the plug-in shaft 604 are adapted to each other.

In addition, referring to Figures 1, 2 and 3, it can be seen that in the present application, the driving source is a driving motor 4, and a motor seat 13 is installed at the bottom of the driving motor 4, wherein carrying sleeves 10 are respectively installed on both sides of the outside of the storage dish 1 near one end of the driving motor 4, and a carrying ring 11 is installed on the top of the carrying sleeve 10. It should be supplemented that a plurality of threaded sleeves are respectively fixed on the outside of the carrying ring 11 and the carrying sleeve 10, and a threaded rod 12 for limiting the carrying ring 11 is installed between the threaded sleeves at the same position between the carrying ring 11 and the carrying sleeve 10.

It should be noted that, with reference to Figure 4, the transmission component 5 in the present application includes: a cover sleeve seat 512, the bottom end of the outside of the cover sleeve seat 512 is sleeved inside the mounting ring 11, and is rotatably connected to the mounting ring 11, and the bottom end of the cover sleeve seat 512 is fixed to the mouth end of the sleeve 601; wherein a connecting arm 511 is fixed to the middle end of the outside of the cover sleeve seat 512, wherein the connecting arm 511 is provided with a plurality of roots, and the plurality of connecting arms 511 are evenly and equidistantly distributed at the middle end of the outside of the cover sleeve seat 512; in addition, a toothed disc 510 is fixed to the top of the connecting arm 511, and an adjusting sleeve 506 is provided on the top of the toothed disc 510, and the outside of the adjusting sleeve 506 is rotatably connected to a stabilizing seat 507 installed on the top of the motor seat 13; a pin hole 509 is provided at the center point of the top of the toothed disc 510, and the adjusting The inside of the sleeve 506 is slidably connected with a sliding latch 504, and the sliding latch 504 and the pin mouth 509 are adapted to each other. It should be supplemented that a screw cover 505 is installed at one end of the sliding latch 504, and the screw cover 505 and the connecting rod 17 are screwed together. The top of the sliding latch 504 is slidably connected with a connecting tube 501, and one end of the connecting tube 501 is fixed to the output end of the driving motor 4. A transmission ring seat 502 is fixed to the middle end of the outside of the sliding latch 504, and a plurality of guide pins 503 are fixed to the outside of the transmission ring seat 502. A guide groove 508 is provided on the inner wall of the adjusting sleeve 506, and the guide groove 508 and the guide pin 503 are adapted to each other. It should also be noted that the cover sleeve seat 512 is a funnel structure, and a threaded tooth is provided on the outside of one end of the connecting rod 17 passing through the cover sleeve seat 512.

It should be added that when the device is actually used, the drive motor 4 runs, and when the drive motor 4 runs, the connecting tube 501 rotates. When the connecting tube 501 rotates, the sliding latch 504 that can slide up and down inside the connecting tube 501 rotates. When the sliding latch 504 rotates, it rotates the corresponding toothed disc 510 through the pin hole 509 on the toothed disc 510 at the corresponding position. Since the two toothed discs 510 are meshed, the other connecting tube 501 also rotates together. In addition, when the toothed disc 510 rotates, the connecting arm 511 brings The movable cover sleeve 512 rotates, and since the cover sleeve 512 and the sleeve 601 are fixed to each other, the sleeve 601 will rotate. Because the sleeve 601 is provided with a coiled spiral blade 603 on the outside, the structure of the sleeve 601 and the spiral blade 603 is similar to that of the auger shaft. Therefore, when the two sleeves 601 rotate in opposite directions at the same speed, when the concrete enters the storage dish 1 from the feed port, the concrete can not only be stirred by the rotating shaft assembly 6 in the storage dish 1, but also the processed concrete can be discharged from the discharge channel 2 during the stirring process.

In addition, when the connecting tube 501 rotates, the transmission ring seat 502 fixed outside the sliding latch 504 also rotates together. Due to the adaptive design of the guide pin 503 fixed outside the transmission ring seat 502 and the guide slot 508 provided in the adjustment sleeve 506, the sliding latch 504 can reciprocate up and down while rotating itself. Since a screw cover 505 is installed at one end of the sliding latch 504, and the screw cover 505 and the connecting rod 17 are screwed together, the connecting rod 17 can perform piston movement in the sleeve 601. It should be added that the screw cover 505 and the sliding latch 504 are rotatably connected here, so This sliding latch 504 can only transmit the up and down reciprocating force to the connecting rod 17. When the connecting rod 17 makes a piston movement, the rotating block 1601 installed outside the connecting rod 17 will also make a piston movement. When the rotating block 1601 makes a piston movement, its external rotating shaft 1603 will allow the rotating block 1601 to rotate itself due to the design of the sliding notch 605. At the same time, due to the adaptive design of the sleeve rod 606 fixed on the spiral blade 603 and the adjustment groove 1605 on the back of the stirring blade 1604, the inclination angle of the stirring blade 1604 will also change during the rotation of the rotating block 1601.

Referring to Figures 1, 2 and 3, it can be seen that a side panel 15 is fixed to the side of the motor seat 13 close to the storage dish 1, two extension frames 14 are fixed outside the side panel 15, and the bottoms of the two stable seats 507 are respectively fixed to the tops of the two extension frames 14. In addition, referring to Figures 1 and 2, it can be seen that in the present application, a control panel 3 is fixed to one side of the outside of the storage dish 1, and the control panel 3 and the drive motor 4 are electrically connected.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims (8)

1. A double-shaft concrete mixing main machine, comprising: a material storage dish (1) for carrying concrete, two rotating shaft assemblies (6) respectively installed on both sides of the material storage dish (1) and a driving source arranged at one end outside the material storage dish (1), wherein the same ends of the two rotating shaft assemblies (6) are respectively fixed with mutually meshing transmission assemblies (5) after passing through one end of the material storage dish (1); characterized in that: a removable cover plate (7) is installed at one end of the dish opening at the top of the material storage dish (1), and the end of the dish opening away from the cover plate (7) is a feed port, and a discharge channel (2) is installed at one end of the bottom of the material storage dish (1) close to the cover plate (7); The rotating shaft assembly (6) comprises: a sleeve (601) mounted on one side of the inner part of the material storage dish (1); the sleeve (601) has an opening that penetrates the material storage dish (1) and is fixed to the outer part of the transmission assembly (5); a plurality of groups of sliding notches (605) are provided on the outer part of the sleeve (601); a group of sliding notches (605) is divided into two, and the two sliding notches (605) are respectively arranged at two relative positions on the outer surface of the sleeve (601); a spiral blade (603) is fixed on the outer part of the sleeve (601); at most one group of sliding notches (605) exists at the gap between the spiral blades (603); the sleeve ( A connecting rod (17) is arranged inside the sleeve (601), one end of the connecting rod (17) is connected to the inside of the transmission assembly (5), an adjusting component (16) whose number matches the number of the sliding notches (605) is installed outside the connecting rod (17), a plurality of sets of sleeve rods (606) whose number matches the adjusting component (16) are fixed to the outer surface of the spiral blade (603), and each set of sleeve rods (606) is divided into two; the adjusting component (16) comprises: a rotating block (1601) adapted to the sleeve (601), the interior of the rotating block (1601) being rotatably connected to the outer wall of the connecting rod (17), and the rotating block A rotating shaft (1603) matched with the sliding notch (605) is fixed at two relative positions on one end of the outer side of (1601), the top of the rotating shaft (1603) is exposed outside the sleeve (601), and a rotatable stirring blade (1604) is installed, and an adjustment groove (1605) is opened on the back of the stirring blade (1604), and the adjustment groove (1605) is matched with the sleeve rod (606); the operation of the driving source causes one of the transmission components (5) to rotate, and the transmission component (5) rotates to cause the sleeve (601) to rotate, so that the connecting rod (17) performs piston motion in the sleeve (601). 2. A double-shaft concrete mixing main unit according to claim 1, characterized in that: a shaft seat (9) is fixed to the end of the outside of the material storage dish (1) away from the driving source, and a plug-in shaft (604) passing through the material storage dish (1) is fixed to one end of the bottom of the sleeve (601), and the shaft body of the plug-in shaft (604) is rotatably connected to the inside of the shaft seat (9). 3. A twin-shaft concrete mixing main machine according to claim 1, characterized in that: the driving source is a driving motor (4), and a motor seat (13) is installed at the bottom of the driving motor (4). 4. A twin-shaft concrete mixing main machine according to claim 3, characterized in that: carrying sleeves (10) are respectively installed on both sides of the outside of the material storage dish (1) near one end of the driving motor (4), and a carrying ring (11) is installed on the top of the carrying sleeve (10); the transmission component (5) comprises: a cover sleeve seat (512), the bottom end of the outside of the cover sleeve seat (512) is sleeved inside the carrying ring (11), and is rotatably connected to the carrying ring (11), and the bottom end of the cover sleeve seat (512) is fixed to the tube mouth end of the sleeve (601); a connecting arm (511) is fixed to the middle end of the outside of the cover sleeve seat (512), a toothed disc (510) is fixed to the top of the connecting arm (511), and an adjusting sleeve (506) is arranged on the top of the toothed disc (510), and the outside of the adjusting sleeve (506) is rotatably connected to a stable seat installed on the top of the motor seat (13). (507); a pin hole (509) is provided at the center point of the top of the toothed disc (510); a sliding latch (504) is slidably connected inside the adjusting sleeve (506); the sliding latch (504) and the pin hole (509) are matched; a screw cover (505) is installed at one end of the sliding latch (504); the screw cover (505) and the connecting rod (17) are screwed together; a connecting tube (501) is slidably connected to the top of the sliding latch (504); one end of the connecting tube (501) and the output end of the driving motor (4) are fixed; a transmission ring seat (502) is fixed at the middle end of the outside of the sliding latch (504); a plurality of guide pins (503) are fixed on the outside of the transmission ring seat (502); a guide groove (508) is provided on the inner wall of the adjusting sleeve (506); the guide groove (508) and the guide pin (503) are matched together. 5. A twin-shaft concrete mixer according to claim 4, characterized in that: the cover sleeve seat (512) is in a funnel structure, and a thread is formed on the outside of one end of the connecting rod (17) passing through the cover sleeve seat (512). 6. A twin-shaft concrete mixing main machine according to claim 4, characterized in that: a side plate (15) is fixed to the motor seat (13) on one side close to the material storage dish (1), two extension frames (14) are fixed outside the side plate (15), and the bottoms of the two stabilizing seats (507) are respectively fixed to the tops of the two extension frames (14). 7. A twin-shaft concrete mixing main machine according to claim 3, characterized in that a control panel (3) is fixed to one side of the outside of the material storage container (1), and the control panel (3) and the drive motor (4) are electrically connected. 8. A twin-shaft concrete mixer according to claim 4, characterized in that: a plurality of connecting arms (511) are provided, and the plurality of connecting arms (511) are evenly and equidistantly distributed at the middle end of the outer portion of the cover sleeve seat (512).