Building cement and gravel mixture preparation device
By setting a closed structure of a movable plug and a material guide cover at the mixer discharge port, the quality problem of the mixture caused by the entry of dust and debris is solved, stable discharge is achieved under extreme temperatures, and the working efficiency of the mixer and the quality of the mixture are improved.
Patent Information
- Application Number
- CN202422703587.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-06
- Publication Date
- 2025-09-23
- Estimated Expiration
- 2034-11-06
AI Technical Summary
The existing mixer discharge port is exposed on the construction site, which makes it easy for dust and debris to enter, affecting the quality and proportion of the sand, gravel and cement mixture, resulting in poor quality of the prepared mixed material.
A mixer discharge port with an adjustable closed structure is designed, including a movable plug and a material guide cover. Combined with an expansion component, the discharge port is closed in the idle state, and the material guide cover and the mixer are driven by a rotary motor to rotate in the opposite direction to form a slow discharge channel to prevent dust and debris from entering. At the same time, the temperature can be adjusted through the expansion component in extreme weather.
It effectively prevents construction site dust and debris from entering the mixing tank, maintains the quality of the mixture, reduces splashing, ensures that the mixture is not affected by extreme temperatures, and improves preparation quality.
Smart Images
Figure CN223369707U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of mortar preparation, in particular to a device for preparing a building cement sand and gravel mixture. Background Art
[0002] Sand and gravel-cement mixture is a commonly used material in construction projects. It is mainly prepared by mixing aggregates such as crushed stone and gravel with cement as a binder. According to the design and use requirements, thickeners, early strength agents, retarders and other admixtures are often added to make the mixture obtain corresponding properties. Currently, sand and gravel-cement mixtures are all prepared using mixers.
[0003] The mixture of sand, gravel and cement is different from general concrete materials. Its aggregate particle size is generally smaller and the cement content is higher. The control of the aggregate particle size and the ratio of cement to aggregate needs to be relatively precise. Most of the existing mixers are directly placed in the open air for use on construction sites. The construction site environment is poor and dusty. The mixer's discharge port is completely exposed. When idle, dust and debris can easily enter the mixer's mixing tank from the discharge port. Directly using the mixer to prepare sand, gravel and cement mixture without the operator's knowledge will result in poor quality of the finished material.
[0004] Therefore, when the above-mentioned existing mixer is used to prepare a mixture of sand, gravel and cement, dust and debris on the construction site can easily enter through the exposed discharge port, affecting the quality and proportion of the raw materials, resulting in poor quality of the prepared mixed materials. A mixer with an adjustable closed structure for the discharge port can be designed. When the equipment is idle, the discharge port of the mixer can be closed, and it can also assist in the slow discharge of the mixture to avoid material splashing. Utility Model Content
[0005] In order to overcome the problem that the discharge port of the existing mixer is exposed, dust and debris on the construction site can easily enter through the discharge port, affecting the quality and proportion of the raw materials, resulting in poor quality of the prepared mixed materials.
[0006] The technical solution of the utility model is: a device for preparing a construction cement sand and gravel mixture, comprising a frame, a feeding hopper and a mixing tank installed on the upper end of the frame, a cylinder, a plug, a rotating motor, a material guide cover, an inner cavity and an extension component; a spiral fan-shaped agitator is provided in the mixing tank, the middle shaft end of the agitator is a heavy hollow structure and is equipped with a cylinder, a shuttle-shaped plug is provided at the discharge port of the mixing tank, the maximum diameter of the middle section of the plug is larger than the discharge port diameter, the plug is a hollow steel skeleton structure and the outer surface of the plug is covered with a silicone layer with a thickness of 2mm-3mm, a rotating motor is fixedly installed in the plug, the output shaft of the rotating motor and the piston rod of the cylinder are connected and anchored by bolts, a bowl-shaped material guide cover is installed on the outside of the plug, the edge of the material guide cover is arranged on the outside of the edge of the discharge port of the mixing tank, an annular inner cavity is provided in the plug, and an extension component for radiating heat outward is provided in the inner cavity.
[0007] Preferably, sand, gravel, water and cement are put into the feed hopper, slowly enter the mixing tank, and are stirred and mixed by the agitator to prepare the mixture. The cylinder pushes the plug to leave the discharge port of the mixing tank, so that a gap of 10-15 cm is formed between the outer surface of the plug and the inner wall of the discharge port. After the mixture is stirred, it is discharged through the gap between the discharge port and the plug. The guide cover is driven by a rotating motor to rotate in the opposite direction to the agitator. The speed is consistent with the speed of the agitator, so that the guide cover and the frame are in a relatively static state. The mixture first falls on the inner wall of the guide cover, slides downward along the inner wall of the guide cover and is slowly discharged. In hot weather, the extension component plays a cooling role at the discharge port position, reduces the hot air entering the mixing tank and causes water to evaporate too quickly, thereby ensuring the quality of the mixture. In cold weather, the mixture is heated by the plug preheated by the extension component to avoid water freezing and causing damage to the internal structure of the mixture.
[0008] Preferably, the extension component includes a heating tube and a power supply built into the plug. The heating tube is a ring structure and is fixed in the inner cavity. The power supply supplies power to the heating resistor wire in the heating tube and the heating temperature of the heating resistor wire is 36-42°C. In cold weather, a plug containing a heating tube in the cavity is selected and installed at the end of the agitator. The mixture flowing out from the gap between the plug and the discharge port passes through the preheated plug surface, and the internal heat increases. When poured out for use, it will not cool down to the ambient temperature too quickly, preventing the water in the mixture from freezing quickly, resulting in a loose structure due to the presence of ice crystal structure when the mixture solidifies.
[0009] Preferably, the extension component includes an orifice opened on the plug, a rubber plug and a coolant; the orifice is connected to the inner cavity, the rubber plug is embedded in the orifice and closes the orifice, the coolant is cold water or ice and is filled in the inner cavity, and in hot weather, a plug with a rubber plug is selected and installed at the end of the agitator, and the coolant is filled into the inner cavity through the orifice. The air near the discharge port is cooled by the coolant to prevent hot air from flowing through the discharge port into the mixing tank, causing the water in the mixture to evaporate too quickly, affecting the quality of material mixing.
[0010] Preferably, a screw sleeve passing through the silicone layer is fixedly connected to the steel skeleton structure of the plug, and a screw head is fixedly connected to the middle of the inner wall of the material guide cover. The screw head is threadedly connected to the screw sleeve and fixes the material guide cover to the plug. The material guide cover can be installed and used according to needs. The threaded installation method is convenient and quick to install and disassemble. The rotating motor outputs power in the reverse direction through the output shaft, driving the plug and the material guide cover fixed to the plug to rotate in the opposite direction to the agitator, so that the material guide cover does not rotate synchronously with the agitator, preventing the mixture from falling on the material guide cover and being thrown out by centrifugal force. The setting of the material guide cover allows the mixture to pass through the gap between the discharge port and the plug and the material guide cover in turn, and the blocking effect of the inner wall of the material guide cover prevents the mixture from falling too quickly and causing splashing.
[0011] Preferably, the clamp is sleeved on the outer wall of the discharge port of the mixing tank and fastened by bolts, and the lower end of the clamp is fixedly connected to a hanger, and the lower end of the hanger is fixedly connected to a material guide trough arranged at a ninety-degree angle to the discharge port of the mixing tank, and the material guide trough is inclined downward from back to front. There are two ways to install and fasten the clamp, depending on whether the mixing tank body rotates. For the mixer with rotating mixing tank, the clamp itself is fastened by bolts, and a certain gap is retained between it and the outer wall of the discharge port, so as not to affect the normal rotation of the mixing tank and stabilize the material guide trough from slipping. Alternatively, the clamp and the frame are bolted and installed to achieve the same effect. For the mixer with non-rotating mixing tank, the clamp can be directly fixed to the outer wall of the discharge port, and the mixture that slowly slides down through the side wall of the guide cover eventually falls into the guide trough and is discharged and collected from the side of the discharge port. Compared with direct discharge from the discharge port, the mixture is not easy to splash.
[0012] Preferably, a support rod consisting of two sections of rods that are slidably connected is fixedly installed at the lower end of the material guide trough, and a base supported on the ground is fixedly installed at the lower end of the support rod of the lower section. A tightening knob is installed on the support rod of the lower section, and the tightening knob is rotated to squeeze and lock the upper section of the rod. The length of the support rod is adjusted according to the height distance between the ground and the discharge port, and is locked by tightening the knob to support the material guide trough and avoid deformation of the material guide trough caused by the strong impact force of the mixture.
[0013] Preferably, two sets of parallel brackets are fixedly installed on the upper end of the frame, and slide rails are installed on the opposite side of the brackets. A shield with a folding flap is slidably connected between the two slide rails and is located above the feed hopper. When sand, gravel and cement raw materials are added, the shield is supported above the feed hopper to reduce dust. The shield can slide, retract and fold along the slide rails, which is easy to use.
[0014] Beneficial effects of the utility model:
[0015] 1. By installing a movable plug structure at the existing mixer discharge port, the discharge port can be closed as needed when the equipment is idle. Compared with the original open discharge port structure, it can effectively prevent dust and debris from entering the construction site, keep the interior of the mixing tank clean, and avoid the quality deterioration of the prepared cement sand and gravel mixture due to contaminants;
[0016] 2. A ring-shaped discharge channel is formed at the discharge port of the mixing tank by means of a plug and a guide cover. During the operation of the mixer, the discharge speed of the discharged mixed material can be slowed down and the possibility of splashing of the mixed material can be reduced;
[0017] 3. By setting up the expansion components in the plug, in hot or cold weather, a heat radiation area can be formed at the discharge port by switching the use mode, which can adjust the temperature of the surrounding air environment or the mixture passing through the surface of the plug, so that the quality of the mixture is less affected by extreme temperature. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 Shown is a schematic diagram of the three-dimensional structure of the construction cement sand and gravel mixture preparation device of the utility model;
[0019] Figure 2 Shown is a front structural diagram of the construction cement sand and gravel mixture preparation device of the utility model;
[0020] Figure 3 Shown is a schematic diagram of the three-dimensional structure of the plug and cylinder installation of the construction cement sand and gravel mixture preparation device of the utility model;
[0021] Figure 4 Shown is a schematic diagram of the three-dimensional structure of the installation of the plug and the material guide cover of the construction cement sand and gravel mixture preparation device of the utility model;
[0022] Figure 5 Shown is a schematic diagram of the first three-dimensional structure of the plug of the construction cement sand and gravel mixture preparation device of the utility model;
[0023] Figure 6 Shown is a three-dimensional structural diagram of the first embodiment of the expansion component of the construction cement sand and gravel mixture preparation device of the present utility model;
[0024] Figure 7 Shown is a schematic diagram of the second three-dimensional structure of the plug of the construction cement sand and gravel mixture preparation device of the utility model;
[0025] Figure 8 Shown is a schematic diagram of the three-dimensional structure of the second embodiment of the expansion component of the construction cement sand and gravel mixture preparation device of the utility model;
[0026] Figure 9 What is shown is a schematic diagram of the three-dimensional structure of the material guide trough of the construction cement sand and gravel mixture preparation device of the present utility model.
[0027] Explanation of the accompanying reference numerals: 1. Frame; 2. Feed hopper; 3. Mixing tank; 4. Cylinder; 5. Plug; 6. Rotating motor; 7. Material guide cover; 8. Inner cavity; 9. Heating tube; 10. Rubber plug; 11. Screw sleeve; 12. Screw head; 13. Clamp; 14. Hanger; 15. Material guide trough; 16. Support rod; 17. Base; 18. Fastening knob; 19. Bracket; 20. Slide rail; 21. Shield. DETAILED DESCRIPTION
[0028] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0029] See also Figures 1-9The utility model provides a construction cement sand and gravel mixture preparation device, including a frame 1, a feeding bin 2 and a mixing tank 3 installed on the upper end of the frame 1, a cylinder 4, a plug 5, a rotating motor 6, a material guide cover 7, an inner cavity 8 and an expansion component; a spiral fan-shaped agitator is provided in the mixing tank 3, the middle shaft end of the agitator is a heavy hollow structure and is equipped with a cylinder 4, a shuttle-shaped plug 5 is provided at the discharge port of the mixing tank 3, the maximum diameter of the middle section of the plug 5 is larger than the diameter of the discharge port, and the plug 5 is a hollow steel frame. The outer surface of the plug 5 is covered with a silicone layer with a thickness of 2mm-3mm. A rotating motor 6 is fixedly installed in the plug 5. The output shaft of the rotating motor 6 is anchored to the piston rod of the cylinder 4 by bolts. A bowl-shaped material guide cover 7 is installed on the outside of the plug 5. The edge of the material guide cover 7 is arranged on the outside of the edge of the discharge port of the mixing tank 3. An annular inner cavity 8 is provided in the plug 5. An expansion component that radiates heat outward is provided in the inner cavity 8. Sand, gravel, water and cement are put into the feed hopper 2 and slowly enter. The mixture is fed into the mixing tank 3 and stirred and mixed by the agitator to prepare a mixture. The cylinder 4 pushes the plug 5 away from the discharge port of the mixing tank 3, so that a gap of 10-15 cm is formed between the outer surface of the plug 5 and the inner wall of the discharge port. After the mixture is stirred, it is discharged through the gap between the discharge port and the plug 5. The guide cover 7, which rotates in the opposite direction to the agitator, is driven by the rotary motor 6. The speed is consistent with the speed of the agitator, so that the guide cover 7 and the frame 1 are in a relatively static state. The mixture first falls on the inner wall of the guide cover 7, slides downward along the inner wall of the guide cover 7 and is slowly discharged. In hot weather, the expansion component plays a cooling role at the discharge port position, reducing the hot air from entering the mixing tank 3 and causing water to evaporate too quickly, thereby ensuring the quality of the mixture. In cold weather, the mixture is heated by the plug 5 preheated by the expansion component to prevent water from freezing and damaging the internal structure of the mixture. After stirring is completed, the mixing tank 3 is cleaned first, and then the plug 5 is driven to retract by the cylinder 4 to close the discharge port of the mixing tank 3.
[0030] See also Figures 1-4 The steel skeleton structure of the plug 5 is fixedly connected with a screw sleeve 11 that passes through the silicone layer, and the middle of the inner wall of the guide cover 7 is fixedly connected with a screw head 12. The screw head 12 is threadedly connected to the screw sleeve 11 and fixes the guide cover 7 to the plug 5. The guide cover 7 can be installed and used as needed. The threaded installation method is convenient and quick to install and disassemble. The rotating motor 6 outputs power in the opposite direction through the output shaft, driving the plug 5 and the guide cover 7 fixed to the plug 5 to rotate in the opposite direction of the agitator, so that the guide cover 7 does not rotate synchronously with the agitator, preventing the mixed material from falling on the guide cover 7 and being thrown out by the centrifugal force. The setting of the guide cover 7 allows the mixed material to pass through the gap between the discharge port and the plug 5 and the guide cover 7 in turn, and the blocking effect of the inner wall of the guide cover 7 prevents the mixed material from falling too fast and causing splashing.
[0031] See also Figure 1-Figure 2 、 Figure 9 The clamp 13 is sleeved on the outer wall of the discharge port of the mixing tank 3 and fastened by bolts. The lower end of the clamp 13 is fixedly connected to a hanger 14. The lower end of the hanger 14 is fixedly connected to a guide trough 15 arranged at a ninety-degree angle with the discharge port of the mixing tank 3. The guide trough 15 is inclined downward from back to front. There are two ways to install and fasten the clamp 13, depending on whether the mixing tank 3 body rotates. For the mixer with rotating mixing tank 3, the clamp 13 itself is fastened by bolts, and a certain gap is retained between it and the outer wall of the discharge port, which does not affect the normal rotation of the mixing tank 3 while stabilizing the guide trough 15 from slipping. Alternatively, the clamp 13 is bolted to the frame 1 for installation, which also achieves the same effect. For the mixer with non-rotating mixing tank 3, The mixer can directly fix the clamp 13 to the outer wall of the discharge port, and the mixed material that slowly slides down through the side wall of the guide cover 7 finally falls into the guide trough 15 and is discharged and collected from the side of the discharge port. Compared with direct discharge from the discharge port, the mixed material is not easy to splash. The lower end of the guide trough 15 is fixedly installed with a support rod 16 that is slidably connected by an upper and lower section of rods. The lower end of the support rod 16 of the lower section is fixedly installed with a base 17 supported on the ground. A tightening knob 18 is installed on the support rod 16 of the lower section, and the tightening knob 18 is rotated to squeeze and lock the upper section rod. The length of the support rod 16 is adjusted according to the height distance between the ground and the discharge port, and is locked by the tightening knob 18 to support the guide trough 15 and prevent the guide trough 15 from being deformed due to the large impact force of the mixture.
[0032] See also Figure 1-Figure 2 Two sets of mutually parallel brackets 19 are fixedly installed on the upper end of the frame 1, and a slide rail 20 is installed on the opposite side of the bracket 19. A shield 21 with a folding flap is slidably connected between the two slide rails 20 and is located above the feed bin 2. When sand, gravel and cement raw materials are added, the shield 21 is supported above the feed bin 2 to reduce dust. The shield 21 can slide, telescope and fold along the slide rail 20, which is easy to use.
[0033] Example 1: Please refer to Figure 5-Figure 6 In this embodiment, the extension component includes a heating tube 9 and a power supply built into the plug 5. The heating tube 9 is a ring structure and is fixedly installed in the inner cavity 8. The power supply supplies power to the heating resistance wire in the heating tube 9 and the heating temperature of the heating resistance wire is 36-42°C. In cold weather, the plug 5 containing the heating tube 9 in the cavity is selected and installed at the end of the agitator. The mixture flowing out from the gap between the plug 5 and the discharge port passes through the preheated surface of the plug 5, and the internal heat increases. When poured out for use, it will not cool down to the ambient temperature too quickly, preventing the water in the mixture from freezing quickly, which will cause the structure to become loose due to the presence of ice crystal structure when the mixture solidifies.
[0034] Example 2: Please refer to Figure 7-Figure 8In this embodiment, the extension component includes an orifice opened on the plug 5, a plug 10 and a coolant; the orifice is communicated with the inner cavity 8, the plug 10 is embedded in the orifice and closes the orifice, the coolant is cold water or ice and is filled in the inner cavity 8, in hot weather, the plug 5 with the plug 10 is selected and installed at the end of the agitator, and the coolant is filled into the inner cavity 8 through the orifice. The air near the discharge port is cooled by the coolant to prevent hot air from flowing through the discharge port into the mixing tank 3, causing the water in the mixture to evaporate too quickly, affecting the quality of material mixing.
[0035] Through the above steps, by setting a movable plug 5 structure at the existing mixer discharge port, the discharge port can be closed as needed when the equipment is idle. Compared with the original open discharge port structure, it can effectively prevent dust and debris from the construction site from entering, keep the interior of the mixing tank 3 clean, and avoid the situation where the prepared cement sand and gravel mixture is mixed with pollutants and the quality deteriorates, so as to solve the problem that the existing mixer discharge port is exposed, dust and debris on the construction site can easily enter from the discharge port, affecting the quality and proportion of the raw materials, and causing the poor quality of the prepared mixed material.
Claims
1. A device for preparing a construction cement sandstone mixture, comprising a frame (1), a feeding bin (2) mounted on the upper end of the frame (1), and a mixing tank (3); characterized in that: The invention also comprises a cylinder (4), a plug (5), a rotary motor (6), a material guide cover (7), an inner cavity (8) and an expansion component; a spiral blade-shaped agitator is arranged in the stirring tank (3); the middle shaft end of the agitator is a heavy hollow structure and is provided with the cylinder (4); a plug (5) with a shuttle-shaped structure is arranged at the discharge port of the stirring tank (3); the maximum diameter of the middle section of the plug (5) is larger than the diameter of the discharge port; the plug (5) is a hollow steel skeleton structure and the outer surface of the plug (5) is covered A silicone layer with a thickness of 2mm-3mm is provided. A rotary motor (6) is fixedly installed in the plug (5). The output shaft of the rotary motor (6) is connected and anchored to the piston rod of the cylinder (4) by bolts. A bowl-shaped material guide cover (7) is installed on the outside of the plug (5). The edge of the material guide cover (7) is arranged on the outside of the edge of the discharge port of the stirring tank (3). An annular inner cavity (8) is provided in the plug (5). An expansion component for radiating heat outward is provided in the inner cavity (8).
2. The construction cement sand and gravel mixture preparation device according to claim 1, characterized in that: The expansion component includes a heating tube (9) and a power supply built into the plug (5). The heating tube (9) is a ring-shaped structure and is fixedly installed in the inner cavity (8). The power supply supplies power to the heating resistance wire in the heating tube (9), and the heating temperature of the heating resistance wire is 36-42°C.
3. The construction cement sand and gravel mixture preparation device according to claim 1, characterized in that: The expansion component comprises an orifice opened on the plug (5), a rubber plug (10) and a coolant; the orifice is communicated with the inner cavity (8), the rubber plug (10) is embedded in the orifice and seals the orifice, and the coolant is cold water or ice and is filled in the inner cavity (8).
4. The construction cement sand and gravel mixture preparation device according to claim 1, characterized in that: A screw sleeve (11) passing through the silicone layer is fixedly connected to the steel frame structure of the plug (5); a screw head (12) is fixedly connected to the middle of the inner wall of the material guide cover (7); the screw head (12) is threadedly connected to the screw sleeve (11) and fixes the material guide cover (7) and the plug (5).
5. The construction cement sand and gravel mixture preparation device according to claim 1, characterized in that: The clamp (13) is sleeved on the outer wall of the discharge port of the mixing tank (3) and fastened by bolts. The lower end of the clamp (13) is fixedly connected to a hanger (14). The lower end of the hanger (14) is fixedly connected to a guide trough (15) arranged at a ninety-degree angle with the discharge port of the mixing tank (3). The guide trough (15) is inclined downward from the back to the front.
6. The device for preparing a construction cement sand and gravel mixture according to claim 5, characterized in that: A support rod (16) formed by slidingly sleeved upper and lower sections of rods is fixedly installed at the lower end of the guide trough (15); a base (17) supported on the ground is fixedly installed at the lower end of the support rod (16); a tightening knob (18) is installed on the support rod (16) of the lower section, and the tightening knob (18) is rotated to squeeze and lock the upper section of the rod.
7. The construction cement sand and gravel mixture preparation device according to claim 1, characterized in that: Two sets of mutually parallel brackets (19) are fixedly installed on the upper end of the frame (1), a slide rail (20) is installed on the opposite side of the bracket (19), and a shield (21) with folding pages located above the feed bin (2) is slidably connected between the two slide rails (20).