Pre-mixing device for concrete construction and mixing method thereof

Abstract

The invention belongs to the technical field of concrete construction, and discloses a pre-mixing device for concrete construction and a mixing method thereof.The pre-mixing device comprises a mixing cylinder and mixing blades, a composite rotating column is rotationally installed in the mixing cylinder, and the mixing blades are fixedly connected to the outer surface of the composite rotating column. According to the invention, the stored additive is released into the mixing cylinder in the stirring process, and the additive is added from the inside of the mixed material, so that the mixing and adding efficiency and effect are improved, the uniformity is improved, the uniform mixing speed is increased, and the actual action efficiency of the additive is greatly improved; and in cooperation with the rotary mixing process, automatic intermittent feeding of the stored additive is achieved, continuous intermittent supplementing is conducted in the rotary mixing process, the feeding effect is further optimized, the additive mixing effect and uniformity are improved, and therefore the concrete pre-mixing quality is improved, and the using effect is good.

Description

Technical Field

[0001] The invention belongs to the technical field of concrete construction, and specifically relates to a premixing device for concrete construction and a mixing method thereof. Background Art

[0002] A ready-mixed concrete plant (also called ready-mixed concrete equipment, concrete mixing plant, or concrete ready-mixing station) is a device used to produce ready-mixed concrete. It mixes cement, aggregates (such as sand and gravel), water, and admixtures in a certain ratio to prepare concrete that meets the design requirements for use on the construction site.

[0003] In the prior art, premixing devices for concrete construction often need to add additives to the concrete in the mixing process during the mixing process to improve the mixing effect and the quality of the mixed concrete. The commonly used adding method is to open the top of the mixing device and directly add additives to the inside. However, the directly added additives fall on the top of the mixed concrete materials. In the subsequent mixing process, it is difficult to quickly mix the additives into the materials. The materials in the actual mixing process are difficult to be quickly and evenly mixed with the added additives. The additives have a slow effect on the mixing of the concrete materials, low mixing efficiency, poor effect, poor application effect of the additives, and poor comprehensive use effect. Summary of the invention

[0004] The object of the present invention is to provide a premixing device for concrete construction and a mixing method thereof to solve the problems raised in the above-mentioned background technology.

[0005] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a premixing device for concrete construction and a mixing method thereof, comprising a mixing drum and a mixing blade, wherein a composite rotating column is rotatably installed inside the mixing drum, the mixing blade is fixedly connected to the outer surface of the composite rotating column, the internal movable sleeve of the composite rotating column is connected to a lifting filler assembly, a loading drum and a power mechanism are fixedly provided on the top of the mixing drum, the loading drum is connected to the inside of the composite rotating column, the power mechanism drives the composite rotating column to rotate, a distribution assembly is fixedly connected to the outer surface of the composite rotating column, an introduction assembly is movably sleeved inside the distribution assembly, the lifting filler assembly is connected to the introduction assembly, and controls the introduction assembly to move up and down, an air supply assembly is provided at the bottom of the mixing drum, the air supply assembly intermittently inputs pressurized air into the composite rotating column, and controls the lifting filler assembly to move up and down; The composite rotating column includes a column body, a stepped cavity, a movable cavity, a No. 1 port, a No. 2 port and a slide groove. The stepped cavity and the movable cavity are respectively opened at the top and bottom of the column body and are connected to each other. The No. 1 port and the No. 2 port are opened on the outer surface of the column body from top to bottom and are both connected to the stepped cavity. The slide groove is opened on the outer surface of the column body, and the internal fixed sleeve of the movable cavity is provided with a connecting portion.

[0006] Preferably, the No. 1 port is located above the mixing barrel, and inside the loading barrel, and is connected to the inner cavity of the loading barrel. The loading barrel is sleeved on the outside of the column and rotatably sleeved relative to the column. A loading port is provided on the top of the loading barrel, and a limit cover is fixedly provided inside the loading barrel, and a notch groove is provided on the side of the limit cover.

[0007] Preferably, the power mechanism includes a motor, gear one and gear two, gear two is fixedly sleeved on the outer surface of the column, gear one is meshingly connected to gear two, gear two is fixedly connected to the output shaft of the motor, the motor controls the selection of the composite rotating column through gear one and the meshing gear two, a retaining ring is fixedly sleeved on the outer surface of the column, the column is rotatably installed in the mixing cylinder through the retaining ring, an adapter is provided at the bottom of the inner cavity of the mixing cylinder, and the bottom of the column is rotatably sleeved in the adapter.

[0008] Preferably, the lifting filler assembly includes a movable rod, a storage cavity, a push rod, a push plate, a spring 1 and an annular groove, the movable rod is movably sleeved in the step cavity, one end of the spring 1 is fixed to the bottom of the movable rod, and the other end is fixed inside the step cavity, the push rod is movably sleeved in the inside of the step cavity and the movable cavity, the upper end of the push rod is fixedly connected to the movable rod, and the lower end is fixedly connected to the push plate, the push plate is movably sleeved in the movable cavity, an elastic sealing ring is provided on the outer side of the push plate, the storage cavity is opened at the top of the movable rod, and the annular groove is opened on the outer surface of the movable rod.

[0009] Preferably, the access assembly includes a movable frame, a connecting frame and a bottom opening, the connecting frame is fixedly connected to one end of the movable frame and are connected to each other, the bottom opening is opened at the bottom of the movable frame, the other end of the connecting frame passes through a slide groove and is fixedly nested on the outside of the movable rod, and the connecting frame is connected to the storage cavity.

[0010] Preferably, the distribution component includes a stirring frame, a discharge outlet, a sealing plug, a first inclined hole and a second inclined hole, the stirring frame is fixedly connected to the outer side of the cylinder and is sleeved on the outer side of the movable frame, the discharge outlet is opened at the bottom of the stirring frame, the sealing plug is fixedly connected to the bottom of the inner cavity of the stirring frame, the sealing plug and the discharge outlet are alternately distributed, the top two sides of the sealing plug are inclined surfaces, the sealing plug is movably sleeved with the bottom outlet, and the bottom outlet is located on the moving path of the sealing plug, the first inclined hole and the second inclined hole are symmetrically opened on the outer side of the stirring frame, the first inclined hole and the second inclined hole are inversely inclined, and the first inclined hole is located below the second inclined hole.

[0011] Preferably, the connecting portion includes a distribution plate and an arc-shaped opening, the distribution plate is fixedly sleeved inside the active cavity, the arc-shaped opening is opened at the bottom of the distribution plate, the distribution plate is located below the push plate, the air supply assembly includes an air pump, a bypass hole and an air inlet hole, the bypass hole and the air inlet hole are symmetrically opened at the bottom of the mixing cylinder and connected with the active cavity, the air pump is fixed to the bottom of the mixing cylinder through a bracket, and the air outlet end is connected with the air inlet hole, and the bypass hole and the air inlet hole are both located on the moving path of the arc-shaped opening.

[0012] Preferably, a blowing assembly is provided on the top of the mixing cylinder, and the blowing assembly includes a vent pipe and a vent cylinder. The vent cylinder is fixedly connected to the top of the inner cavity of the mixing cylinder and is sleeved on the outside of the column. The No. 2 port is located in the vent cylinder, and the No. 2 port is connected to the annular groove. The vent pipe is fixedly nested in the interior of the mixing cylinder, one end of the vent pipe is fixed to and connected with the vent cylinder, and the other end of the vent pipe is located at the top of the mixing cylinder. A heating pipe is fixedly provided in the vent cylinder.

[0013] Preferably, the distribution component is elastically connected internally with an elastic sealing component, and the elastic sealing component includes a sealing plate, a baffle and a second spring. The top of the sealing plate is fixedly connected with a second spring, and the other end of the second spring is fixed to the top of the inner cavity of the stirring frame. The baffle is fixedly connected to the bottom of the sealing plate, and the second inclined hole is located on the moving path of the stirring frame.

[0014] A mixing method of a premixing device for concrete construction, comprising the following mixing steps: Step 1: Put the measured material to be mixed into the mixing cylinder through the feed port opened on the top of the mixing cylinder, cover the sealing cover, start the power mechanism, and drive the composite rotating column to rotate, so that the composite rotating column drives the mixing blades and the distribution component to rotate synchronously to mix; Step 2: Inject the additive to be added into the loading barrel, and the additive enters the storage cavity of the lifting filler assembly through the No. 1 port, and is guided into the inlet assembly; Step 3: Start the air supply component, and the air pump inputs the pressurized air into the bottom of the composite rotating column through the air inlet hole. As the composite rotating column drives the connecting part to rotate, when the connecting part is connected to the air inlet hole, the pressurized air is input into the interior of the composite rotating column, and pushes the lifting and lowering filler component to move upward, and drives the access component to move upward, so that the bottom port in the access component is opened, and the liquid additive is discharged downward through the bottom port and the discharge port, and injected into the mixing concrete. As the mixing rotates, when the connecting part rotates and is connected to the bypass hole, the pressurized air inside the composite rotating column is released, the lifting and lowering filler component moves down to reset, and the access component moves down to seal again, and the additive is intermittently fed as the rotation is completed; Step 4: When internal heating is required in winter, use an external pump air mechanism to input circulating air into the ventilation pipe and into the ventilation cylinder, start the internal heating pipe of the ventilation cylinder, so that the heated hot air is input into the space between the stepped cavity and the annular groove of the column through the No. 2 port, and enters into the stirring frame of the distribution component through the slide groove, and is blown out through the No. 1 inclined hole. During the rotation process, the lifting and lowering filler assembly moves up and down, pushing the elastic sealing assembly upward when rising, opening the No. 2 inclined hole while the assembly seals the No. 1 inclined hole. The hot air switches direction through the No. 2 inclined hole and is input into the mixing cylinder to complete the internal heating and temperature rise.

[0015] The beneficial effects of the present invention are as follows: (1) The present invention utilizes the combination of a composite rotating column, a lifting filler assembly, an air supply assembly, and a connecting portion. During the rotary mixing process, on the one hand, the additives can be stored in advance, and the stored additives can be released into the interior of the mixing drum during the mixing process, so that the additives can be added from the inside of the mixed materials, thereby improving the efficiency and effect of the mixed addition, improving the uniformity, and increasing the speed of the mixing consistency, greatly improving the actual efficiency of the additives. On the other hand, during the rotary mixing process, the stored additives can be automatically intermittently fed, and the additives can be continuously and intermittently fed during the rotary mixing process, further optimizing the feeding effect, improving the mixing effect and uniformity of the additives, thereby improving the quality of the concrete premix and achieving good use effect.

[0016] (2) The present invention reuses the distribution component, the feed component, the lifting filler component and the composite rotating column, cooperates with the elastic sealing component and the blowing component, and introduces heated air into the distribution component in a winter environment, and intermittently changes the blowing direction to evenly and effectively input the hot air into the mixing cylinder, thereby achieving the heating of the internal materials. In the winter mixing environment, the mixing temperature is increased to avoid the mixing effect being affected by too low a temperature, and the heating is even, and the use effect is good.

[0017] (3) The present invention cooperates with the intermittent air blowing of the above-mentioned distribution component and utilizes full coverage blowing in different directions at the same time. After the mixing is completed, internal blowing with pressurized air is used to achieve rapid cleaning. At the same time, hot air blowing and drying is achieved on the inside of the mixing cylinder after water washing. The actual blowing angle changes intermittently to cover the entire internal space of the mixing cylinder, thereby improving the efficiency and effect of cleaning and drying, and having a good comprehensive use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a cross-sectional schematic diagram of the present invention; Figure 3 It is a schematic diagram of the connection between the distribution assembly and the composite rotating column of the present invention; Figure 4 It is a cross-sectional schematic diagram of the composite rotating column and the connecting portion of the present invention; Figure 5 It is a cross-sectional schematic diagram of the composite rotating column and lifting filler assembly of the present invention; Figure 6 It is a cross-sectional schematic diagram of the lifting filler assembly of the present invention; Figure 7 It is a cross-sectional schematic diagram of the distribution component and the access component of the present invention; Figure 8 It is an exploded schematic diagram of the distribution component, the access component and the elastic sealing component of the present invention; Fig. 9 It is a bottom schematic diagram of the loading barrel of the present invention.

[0019] In the figure: 1. Mixing cylinder; 2. Compound rotating column; 21. Column; 22. Step chamber; 23. Active chamber; 24. No. 1 port; 25. No. 2 port; 26. Slide; 3. Mixing blade; 4. Lifting filler assembly; 41. Active rod; 42. Storage chamber; 43. Push rod; 44. Push plate; 45. Spring 1; 46. Ring groove; 5. Loading cylinder; 6. Ventilation cylinder; 7. Ventilation pipe; 8. Power mechanism; 9. Air pump; 10. Bypass hole; 11. Air intake hole; 12, connecting part; 121, distribution plate; 122, arc-shaped mouth; 13, distribution component; 131, stirring frame; 132, discharge port; 133, sealing plug; 134, inclined hole No. 1; 135, inclined hole No. 2; 14, access component; 141, movable frame; 142, connecting frame; 143, bottom mouth; 15, elastic sealing component; 151, sealing plate; 152, baffle; 153, spring No. 2; 16, limit cover; 17, notch groove. DETAILED DESCRIPTION

[0020] 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.

[0021] like Figures 1 to 9 As shown, the embodiment of the present invention provides a premixing device for concrete construction and a mixing method thereof, including a mixing drum 1 and a mixing blade 3, wherein a composite rotating column 2 is rotatably installed inside the mixing drum 1, the mixing blade 3 is fixedly connected to the outer surface of the composite rotating column 2, the internal movable sleeve of the composite rotating column 2 is connected with a lifting filler assembly 4, a feeding drum 5 and a power mechanism 8 are fixedly provided on the top of the mixing drum 1, the feeding drum 5 is connected to the inside of the composite rotating column 2, the power mechanism 8 drives the composite rotating column 2 to rotate, a distribution assembly 13 is fixedly connected to the outer surface of the composite rotating column 2, a feed assembly 14 is movably sleeved inside the distribution assembly 13, and the lifting filler assembly 4 is connected to the feed assembly 1 4 is connected, and controls the up and down movement of the introduction component 14. An air supply component is provided at the bottom of the mixing drum 1. The air supply component intermittently inputs pressurized air into the compound rotating column 2, and controls the up and down movement of the lifting filler component 4. The compound rotating column 2 includes a column 21, a stepped cavity 22, an active cavity 23, a No. 1 port 24, a No. 2 port 25 and a chute 26. The stepped cavity 22 and the active cavity 23 are respectively arranged at the top and the bottom of the column 21, and are connected to each other. The No. 1 port 24 and the No. 2 port 25 are respectively arranged on the outer surface of the column 21 from top to bottom, and are both connected to the stepped cavity 22. The chute 26 is arranged on the outer surface of the column 21, and the internal fixed sleeve of the active cavity 23 is provided with a connecting portion 12.

[0022] First embodiment: the metered material to be mixed is put into the mixing barrel 1 through the feed port opened at the top, the sealing cover is covered, the power mechanism 8 is started, the motor drives the gear 1 to rotate, so that the gear 2 rotates, drives the column 21 to rotate, and the composite rotating column 2 rotates, so that the composite rotating column 2 drives the stirring blade 3 and the distribution component 13 to rotate synchronously for mixing, and the additive to be added is injected into the upper barrel 5, and the additive enters the interior of the column 21 through the No. 1 port 24, and falls into the storage chamber 42 of the lifting filler component 4, and is guided into the entry component 14, the air supply component is started, and the air pump 9 inputs pressurized air into the bottom of the composite rotating column 2 through the air inlet 11. As the composite rotating column 2 drives the connecting part 12 to rotate, when the connecting part 12 and the air inlet hole When 11 is connected, pressurized air is input into the interior of the composite rotating column 2, and pushes the push plate 44 to move along the active cavity 23, so that the lifting filler assembly 4 moves upward, and drives the access assembly 14 to move upward, the spring 45 is stretched, and synchronously drives the access assembly 14 to slide along the slide groove 26, so that the access assembly 14 moves upward, the bottom port 143 is staggered with the sealing plug 133, the bottom port 143 is opened, and the liquid additive is discharged downward through the bottom port 143 and the discharge port 132, and injected into the mixing concrete, with the rotation and mixing, when the connecting part 12 rotates and connects with the bypass hole 10, the pressurized air inside the composite rotating column 2 is released, the lifting filler assembly 4 moves down and resets, the access assembly 14 moves down and seals again, and the additive is intermittently fed as the rotation is completed.

[0023] Firstly, by utilizing the combination of the composite rotating column 2, the lifting filler assembly 4, the air supply assembly and the connecting portion 12, during the rotary mixing process, on the one hand, the additives are stored in advance, and during the mixing process, the stored additives are released into the interior of the mixing drum 1, and the additives are added from the inside of the mixed materials, thereby improving the efficiency and effect of the mixed addition, improving the uniformity, and increasing the speed of the consistent mixing, greatly improving the actual efficiency of the additives, and on the other hand, in the rotary mixing process, the stored additives are automatically intermittently fed, and are continuously and intermittently fed during the rotary mixing process, further optimizing the feeding effect, improving the mixing effect and uniformity of the additives, thereby improving the quality of the concrete premix and achieving good use effect.

[0024] Second embodiment: When internal heating is required in winter, the circulating air is input into the ventilation pipe 7 by using an external pump mechanism, and then enters the ventilation cylinder 6, and the heating pipe inside the ventilation cylinder 6 is started, so that the heated hot air is input into the space between the stepped cavity 22 and the annular groove 46 of the column 21 through the second port 25, and enters the stirring frame 131 of the distribution component 13 through the slide groove 26, and is blown out through the first inclined hole 134. In addition, as the lifting filler component 4 moves up and down during the rotation process, the elastic seal is pushed up when it rises. The component 15 moves upward, the spring 2 153 is compressed, the sealing plate 151 moves upward to open the No. 2 inclined hole 135, and the upward access component 14 seals the No. 1 inclined hole 134. The hot air switches direction through the No. 2 inclined hole 135 and is input into the mixing cylinder 1 to fully heat the interior. After the mixing is completed, the mixing cylinder 1 is purged and cleaned by introducing pressurized air and blowing through the gap between the No. 1 inclined hole 134 and the No. 2 inclined hole 135. After adding cleaning water for flushing, the interior can be blown and dried by wind.

[0025] First, by reusing the distribution component 13, the introduction component 14, the lifting filler component 4 and the composite rotating column 2, and cooperating with the elastic sealing component 15 and the blowing component, in a winter environment, the heated air is introduced into the distribution component 13, and the blowing direction is changed intermittently, and the hot air is evenly and effectively input into the mixing cylinder 1 to achieve the heating of the internal materials. In the winter mixing environment, the mixing temperature is increased to avoid the mixing effect being affected by too low a temperature, and the heating is even, and the use effect is good.

[0026] In addition, in conjunction with the intermittent air blowing of the above-mentioned distribution component 13, full coverage blowing in different directions is used at the same time. After mixing is completed, internal blowing with pressurized air is used to achieve rapid cleaning. At the same time, hot air blowing and drying is achieved on the inside of the mixing cylinder 1 after water washing. The actual blowing angle changes intermittently to cover the entire internal space of the mixing cylinder 1, thereby improving the efficiency and effect of cleaning and drying, and the comprehensive use effect is good.

[0027] Among them, the No. 1 port 24 is located above the mixing barrel 1, and is located inside the loading barrel 5, and is connected to the inner cavity of the loading barrel 5. The loading barrel 5 is sleeved on the outside of the column 21 and is rotatably sleeved relative to the column 21. A loading port is provided on the top of the loading barrel 5, and a limit cover 16 is fixedly provided inside the loading barrel 5, and a notch groove 17 is opened on the side of the limit cover 16.

[0028] By utilizing the No. 1 port 24 to guide the additive into the storage chamber 42, the loading barrel 5 is used to complete the centralized filling of the additive, and the cooperation between the notch groove 17 and the limiting cover 16 enables the No. 1 port 24 to be intermittently connected with the notch groove 17 during the rotation process, thereby further realizing the intermittent storage of the additive.

[0029] Among them, the power mechanism 8 includes a motor, gear 1 and gear 2, gear 2 is fixedly sleeved on the outer surface of the column 21, gear 1 is meshed with gear 2, gear 2 is fixedly connected to the output shaft of the motor, the motor controls the selection of the composite rotating column 2 through gear 1 and the meshing gear 2, a retaining ring is fixedly sleeved on the outer surface of the column 21, the column 21 is rotatably installed in the mixing barrel 1 through the retaining ring, an adapter is provided at the bottom of the inner cavity of the mixing barrel 1, and the bottom of the column 21 is rotatably sleeved in the adapter.

[0030] The driving action is realized through the power mechanism, the rotation control of the composite rotating column 2 is realized, and the basic mixing is completed.

[0031] Among them, the lifting filler assembly 4 includes a movable rod 41, a storage cavity 42, a push rod 43, a push plate 44, a spring 45 and an annular groove 46. The movable rod 41 is movably sleeved in the step cavity 22. One end of the spring 45 is fixed to the bottom of the movable rod 41, and the other end is fixed to the inside of the step cavity 22. The push rod 43 is movably sleeved in the inside of the step cavity 22 and the movable cavity 23. The upper end of the push rod 43 is fixedly connected to the movable rod 41, and the lower end is fixedly connected to the push plate 44. The push plate 44 is movably sleeved in the movable cavity 23. An elastic sealing ring is provided on the outer side of the push plate 44. The storage cavity 42 is opened at the top of the movable rod 41, and the annular groove 46 is opened on the outer surface of the movable rod 41.

[0032] The lifting filler assembly 4 controls the movement of the access assembly 14 through the lifting action, thereby controlling the opening and closing of the access assembly 1, and on the other hand, realizes the switching connection between the No. 1 inclined hole 134 and the No. 2 inclined hole 135. The elasticity of the spring 1 45 facilitates elastic reset after rising, and the push plate 44 is pushed by the pressurized air to move upward. The annular groove 46 ensures that the pressurized air input from the outside is always connected to realize the guided input of hot air.

[0033] The inlet assembly 14 includes a movable frame 141, a connecting frame 142 and a bottom opening 143. The connecting frame 142 is fixedly connected to one end of the movable frame 141 and communicates with each other. The bottom opening 143 is opened at the bottom of the movable frame 141. The other end of the connecting frame 142 passes through the slide groove 26 and is fixedly nested on the outside of the movable rod 41. The connecting frame 142 is communicated with the storage chamber 42. The distribution assembly 13 includes a stirring frame 131, a discharge port 132, a sealing plug 133, a first oblique hole 134 and a second oblique hole 135. The stirring frame 131 is fixedly connected to the outer surface of the column 21 and is sleeved on the movable frame. The outer side of the stirring frame 141, the discharge outlet 132 is opened at the bottom of the stirring frame 131, the sealing plug 133 is fixedly connected to the bottom of the inner cavity of the stirring frame 131, the sealing plug 133 and the discharge outlet 132 are alternately distributed, the top two sides of the sealing plug 133 are inclined surfaces, the sealing plug 133 is movably connected to the bottom opening 143, and the bottom opening 143 is located on the moving path of the sealing plug 133, the No. 1 inclined hole 134 and the No. 2 inclined hole 135 are symmetrically opened on the outer side of the stirring frame 131, the No. 1 inclined hole 134 and the No. 2 inclined hole 135 are inclined in opposite directions, and the No. 1 inclined hole 134 is located below the No. 2 inclined hole 135.

[0034] The stored additives are temporarily stored through the access component 14 and released when the bottom is opened. The bottom port 143 cooperates with the sealing plug 133, which is sealed when sleeved and released when opened. The top slope of the sealing plug 133 improves the release smoothness and avoids the clogging of the additives. The discharge port 132 is used to release the additives. The No. 1 inclined hole 134 and the No. 2 inclined hole 135 realize different inclined directions, and cooperate with the introduction of purge air to realize exhaust purge in different directions.

[0035] Among them, the connecting part 12 includes a distribution plate 121 and an arc-shaped opening 122. The distribution plate 121 is fixedly sleeved inside the active chamber 23. The arc-shaped opening 122 is opened at the bottom of the distribution plate 121. The distribution plate 121 is located below the push plate 44. The air supply component includes an air pump 9, a bypass hole 10 and an air inlet hole 11. The bypass hole 10 and the air inlet hole 11 are symmetrically opened at the bottom of the mixing cylinder 1 and are connected to the active chamber 23. The air pump 9 is fixed to the bottom of the mixing cylinder 1 through a bracket, and the air outlet end is connected to the air inlet hole 11. The bypass hole 10 and the air inlet hole 11 are both located on the moving path of the arc-shaped opening 122.

[0036] By utilizing the connecting portion 12 to control the air intake and exhaust in the composite rotating column 2, when it is connected with the air inlet hole 11 during rotation, pressurized air is introduced to push the lifting filler assembly 4 from the bottom, and when it rotates and is connected with the bypass hole 10, the internal pressurized air is discharged and reset to achieve up and down reciprocating movement.

[0037] Among them, a blowing assembly is provided at the top of the mixing cylinder 1, and the blowing assembly includes a vent pipe 7 and a vent cylinder 6. The vent cylinder 6 is fixedly connected to the top of the inner cavity of the mixing cylinder 1 and is sleeved on the outside of the column 21. The No. 2 port 25 is located in the vent cylinder 6, and the No. 2 port 25 is connected to the annular groove 46. The vent pipe 7 is fixedly nested in the interior of the mixing cylinder 1, one end of the vent pipe 7 is fixed and connected to the vent cylinder 6, and the other end of the vent pipe 7 is located at the top of the mixing cylinder 1, and a heating pipe is fixedly provided in the vent cylinder 6.

[0038] The air blowing component realizes hot air input through an external air pump mechanism and cooperates with an internal heating pipe, thereby heating the mixed concrete from the inside in winter to avoid freezing and improve the mixing effect.

[0039] Among them, the internal elastic connection of the distribution component 13 is with the elastic sealing component 15, and the elastic sealing component 15 includes a sealing plate 151, a baffle 152 and a spring 153. The top of the sealing plate 151 is fixedly connected with the spring 153, and the other end of the spring 153 is fixed to the top of the inner cavity of the stirring frame 131. The baffle 152 is fixedly connected to the bottom of the sealing plate 151, and the No. 2 inclined hole 135 is located on the moving path of the stirring frame 131.

[0040] The elastic sealing component 15 adapts to the push of the access component 14, and naturally seals the second inclined hole 135 when not pushed. When the baffle 152 is pushed upward, the spring 153 is compressed to open the second inclined hole 135, concentrating an inclined angle for hot air input or blowing cleaning and drying.

[0041] A mixing method of a premixing device for concrete construction, comprising the following mixing steps: Step 1: Put the measured material to be mixed into the mixing cylinder 1 through the feed port opened at the top, cover the sealing cover, start the power mechanism 8, and drive the composite rotating column 2 to rotate, so that the composite rotating column 2 drives the mixing blade 3 and the distribution component 13 to rotate synchronously to mix; Step 2: inject the additive to be added into the upper barrel 5, the additive enters the storage chamber 42 of the lifting filler assembly 4 through the No. 1 port 24, and is guided into the access assembly 14; Step 3: Start the air supply component, and the air pump 9 inputs the pressurized air into the bottom of the composite rotating column 2 through the air inlet 11. As the composite rotating column 2 drives the connecting part 12 to rotate, when the connecting part 12 is connected to the air inlet 11, the pressurized air is input into the interior of the composite rotating column 2, and pushes the lifting and lowering filler component 4 to move upward, and drives the access component 14 to move upward, so that the bottom port 143 in the access component 14 is opened, and the liquid additive is discharged downward through the bottom port 143 and the discharge port 132, and injected into the mixing concrete. As the mixing rotates, when the connecting part 12 rotates and is connected to the bypass hole 10, the pressurized air inside the composite rotating column 2 is released, the lifting and lowering filler component 4 moves down to reset, and the access component 14 moves down to seal again, and the additive is intermittently fed as the rotation is completed; Step 4: When internal heating is required in winter, an external pumping mechanism is used to input circulating air into the ventilation pipe 7 and into the ventilation cylinder 6, and the internal heating pipe of the ventilation cylinder 6 is started, so that the heated hot air is input into the space between the stepped cavity 22 and the annular groove 46 of the column 21 through the No. 2 port 25, and is passed into the stirring frame 131 of the distribution component 13 through the slide groove 26, and is blown out through the No. 1 inclined hole 134. During the rotation process, the lifting and lowering filler component 4 moves up and down, pushing the elastic sealing component 15 upward when rising, opening the No. 2 inclined hole 135 while the No. 1 inclined hole 134 is sealed by the component 14. The hot air switches direction through the No. 2 inclined hole 135 and is input into the mixing cylinder 1, completing the internal heating and temperature rise.

[0042] 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

1. A premixing device for concrete construction, comprising a mixing drum (1) and a mixing blade (3), characterized in that: A composite rotating column (2) is rotatably mounted inside the mixing cylinder (1), the mixing blade (3) is fixedly connected to the outer surface of the composite rotating column (2), a lifting filler assembly (4) is movably sleeved inside the composite rotating column (2), a loading cylinder (5) and a power mechanism (8) are fixedly provided on the top of the mixing cylinder (1), the loading cylinder (5) is connected to the inside of the composite rotating column (2), the power mechanism (8) drives the composite rotating column (2) to rotate, a distribution assembly (13) is fixedly connected to the outer surface of the composite rotating column (2), a feed assembly (14) is movably sleeved inside the distribution assembly (13), the lifting filler assembly (4) is connected to the feed assembly (14), and controls the feed assembly (14) to move up and down, and an air supply assembly is provided at the bottom of the mixing cylinder (1), the air supply assembly intermittently inputs pressurized air into the composite rotating column (2), and controls the lifting filler assembly (4) to move up and down; The composite rotating column (2) comprises a column body (21), a stepped cavity (22), a movable cavity (23), a first port (24), a second port (25) and a slide groove (26); the stepped cavity (22) and the movable cavity (23) are respectively arranged at the top and the bottom of the column body (21) and are in communication with each other; the first port (24) and the second port (25) are arranged on the outer surface of the column body (21) from top to bottom and are both in communication with the stepped cavity (22); the slide groove (26) is arranged on the outer surface of the column body (21); and a connecting portion (12) is provided in a fixed sleeve inside the movable cavity (23).

2. A premixing device for concrete construction according to claim 1, characterized in that: The No. 1 port (24) is located above the mixing barrel (1) and inside the loading barrel (5), and is communicated with the inner cavity of the loading barrel (5). The loading barrel (5) is sleeved on the outside of the column (21) and is rotatably sleeved relative to the column (21). A loading port is provided at the top of the loading barrel (5). A limit cover (16) is fixedly provided inside the loading barrel (5), and a notch groove (17) is provided on the side of the limit cover (16).

3. A premixing device for concrete construction according to claim 2, characterized in that: The power mechanism (8) comprises a motor, a first gear and a second gear, wherein the second gear is fixedly sleeved on the outer surface of the column (21), the first gear is meshed with the second gear, the second gear is fixedly connected to the output shaft of the motor, the motor controls the selection of the composite rotating column (2) through the first gear and the meshed second gear, a retaining ring is fixedly sleeved on the outer surface of the column (21), the column (21) is rotatably installed in the mixing cylinder (1) through the retaining ring, the bottom of the inner cavity of the mixing cylinder (1) is provided with an adapter, and the bottom of the column (21) is rotatably sleeved in the adapter.

4. A premixing device for concrete construction according to claim 3, characterized in that: The lifting filler assembly (4) comprises a movable rod (41), a storage chamber (42), a push rod (43), a push plate (44), a spring (45) and an annular groove (46); the movable rod (41) is movably sleeved in the step chamber (22); one end of the spring (45) is fixed to the bottom of the movable rod (41), and the other end is fixed to the inside of the step chamber (22); the push rod (43) is movably sleeved in the inside of the step chamber (22) and the movable chamber (23); the upper end of the push rod (43) is fixedly connected to the movable rod (41), and the lower end is fixedly connected to the push plate (44); the push plate (44) is movably sleeved in the movable chamber (23); an elastic sealing ring is provided on the outer side of the push plate (44); the storage chamber (42) is opened at the top of the movable rod (41), and the annular groove (46) is opened on the outer surface of the movable rod (41).

5. A premixing device for concrete construction according to claim 4, characterized in that: The access assembly (14) comprises a movable frame (141), a connecting frame (142) and a bottom opening (143); the connecting frame (142) is fixedly connected to one end of the movable frame (141) and the two are in communication with each other; the bottom opening (143) is provided at the bottom of the movable frame (141); the other end of the connecting frame (142) passes through a sliding groove (26) and is fixedly nested on the outside of the movable rod (41); and the connecting frame (142) is in communication with the storage chamber (42).

6. A premixing device for concrete construction according to claim 5, characterized in that: The distribution assembly (13) comprises a stirring frame (131), a discharge port (132), a sealing plug (133), a first inclined hole (134) and a second inclined hole (135); the stirring frame (131) is fixedly connected to the outer surface of the column (21) and sleeved on the outer side of the movable frame (141); the discharge port (132) is provided at the bottom of the stirring frame (131); the sealing plug (133) is fixedly connected to the bottom of the inner cavity of the stirring frame (131); the sealing plug (133) and the discharge port (132) are connected to the inner cavity of the stirring frame (131); 32) are alternately distributed, both sides of the top of the sealing plug (133) are inclined surfaces, the sealing plug (133) is movably connected with the bottom opening (143), and the bottom opening (143) is located on the moving path of the sealing plug (133), the first inclined hole (134) and the second inclined hole (135) are symmetrically opened on the outer surface of the stirring frame (131), the first inclined hole (134) and the second inclined hole (135) are inclined in opposite directions, and the first inclined hole (134) is located below the second inclined hole (135).

7. A premixing device for concrete construction according to claim 6, characterized in that: The communication portion (12) comprises a distribution plate (121) and an arc-shaped opening (122); the distribution plate (121) is fixedly sleeved inside the active chamber (23); the arc-shaped opening (122) is provided at the bottom of the distribution plate (121); the distribution plate (121) is located below the push plate (44); the air supply assembly comprises an air pump (9), a bypass hole (10) and an air inlet hole (11); the bypass hole (10) and the air inlet hole (11) are symmetrically provided at the bottom of the mixing cylinder (1) and are in communication with the active chamber (23); the air pump (9) is fixed to the bottom of the mixing cylinder (1) by a bracket, and the air outlet end is in communication with the air inlet hole (11); the bypass hole (10) and the air inlet hole (11) are both located on the moving path of the arc-shaped opening (122).

8. A premixing device for concrete construction according to claim 7, characterized in that: A blowing assembly is provided at the top of the mixing cylinder (1), and the blowing assembly comprises a vent pipe (7) and a vent cylinder (6). The vent cylinder (6) is fixedly connected to the top of the inner cavity of the mixing cylinder (1) and is sleeved on the outside of the column (21). The No. 2 port (25) is located in the vent cylinder (6), and the No. 2 port (25) is communicated with the annular groove (46). The vent pipe (7) is fixedly nested in the interior of the mixing cylinder (1), one end of the vent pipe (7) is fixed to and communicated with the vent cylinder (6), and the other end of the vent pipe (7) is located at the top of the mixing cylinder (1). A heating pipe is fixedly provided in the vent cylinder (6).

9. A premixing device for concrete construction according to claim 8, characterized in that: The distribution component (13) is elastically connected to an elastic sealing component (15) inside, and the elastic sealing component (15) comprises a sealing plate (151), a baffle (152) and a second spring (153). The top of the sealing plate (151) is fixedly connected with the second spring (153), and the other end of the second spring (153) is fixed to the top of the inner cavity of the stirring frame (131). The baffle (152) is fixedly connected to the bottom of the sealing plate (151), and the second inclined hole (135) is located on the moving path of the stirring frame (131).

10. The mixing method of a premixing device for concrete construction according to claim 9, characterized in that: The mixing steps include: The first step is to feed the measured material to be mixed through the feed port opened at the top of the mixing cylinder (1), cover the sealing cover, start the power mechanism (8), and drive the composite rotating column (2) to rotate, so that the composite rotating column (2) drives the mixing blade (3) and the distribution component (13) to rotate synchronously to perform mixing; Step 2: injecting the additive to be added into the upper barrel (5), the additive enters the storage chamber (42) of the lifting filler assembly (4) through the No. 1 port (24), and is guided into the inlet assembly (14); Step 3: Start the air supply component, and the air pump (9) inputs the pressurized air into the bottom of the composite rotating column (2) through the air inlet (11). As the composite rotating column (2) drives the connecting part (12) to rotate, when the connecting part (12) is connected to the air inlet (11), the pressurized air is input into the interior of the composite rotating column (2), and pushes the lifting filler component (4) to move upward, and drives the feed component (14) to move upward, so that the bottom port (143) in the feed component (14) is opened, and the liquid additive is discharged downward through the bottom port (143) and the discharge port (132), and is injected into the concrete being mixed. As the mixing is carried out, when the connecting part (12) rotates and is connected to the bypass hole (10), the pressurized air inside the composite rotating column (2) is released, the lifting filler component (4) moves downward to reset, and the feed component (14) moves downward to be sealed again. As the rotation is completed, the additive is intermittently fed; Step 4: When internal heating is required in winter, the circulating air is input into the ventilation pipe (7) and into the ventilation cylinder (6) by using an external pump mechanism, and the internal heating pipe of the ventilation cylinder (6) is started, so that the heated hot air is input into the space between the stepped cavity (22) and the annular groove (46) of the column (21) through the No. 2 port (25), and is passed into the stirring frame (131) of the distribution component (13) through the slide groove (26), and is blown out through the No. 1 inclined hole (134). In addition, as the lifting filler component (4) moves up and down during the rotation process, the elastic sealing component (15) is pushed upward when it rises, and the No. 2 inclined hole (135) is opened while the No. 1 inclined hole (134) is sealed by the component (14). The hot air switches direction through the No. 2 inclined hole (135) and is input into the interior of the mixing cylinder (1), thereby completing the internal heating and temperature rise.

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