Hydraulic forcing type double-horizontal-shaft concrete mixer

Abstract

The invention belongs to the technical field of concrete mixing equipment, and particularly relates to a hydraulic forced double-horizontal-shaft concrete mixer. Comprising a base, a stirring barrel and a discharging device, the stirring barrel is installed on the base, the discharging device is installed at a discharging opening in the bottom end of the stirring barrel, two material blocking plates are fixed to the positions, on the two sides of the discharging opening, of the base, and the discharging device comprises a first end plate and a second end plate; the hollow shaft is connected to the mixing drum at the two ends of the discharge port through a driving shaft and a hollow shaft bearing respectively, and a plurality of slurry suction holes are formed in the part, inside the mixing drum, of the hollow shaft. The industrial problems that the blades are large in resistance and prone to breakage, and slurry and water are mixed unevenly are solved, the device is particularly suitable for large-scale efficient production of hydraulic roller compacted concrete, bottom slurry and water deposition is thoroughly eliminated through the synergistic effect of inner circulation of the stirring blades and slurry and water outer circulation, and the uniformity of the concrete is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of concrete mixing equipment, and in particular relates to a hydraulic type forced double-horizontal shaft concrete mixer. Background Art

[0002] The characteristics of hydraulic roller compacted concrete production and construction in water conservancy and hydropower engineering construction are high concrete density and large demand. When choosing a concrete mixer, it is usually downgraded, such as producing 5m 3 of concrete, 6m 3 Concrete mixer. The forced twin-shaft mixer is a commonly used concrete mixing equipment. When used to produce hydraulic concrete, it has the following shortcomings. Considering the downgrade, the radial and axial diameters of the mixing drum need to be increased, but the mixing blades cannot be enlarged in proportion. This is because after the radial diameter becomes thicker, the connecting rod of the blade becomes longer. The resistance of the oversized blade increases during mixing, which easily causes the connecting rod to break. Therefore, the mixing efficiency is lower than that of a mixer with a smaller diameter, and sufficient time is required to mix water and other materials. During the mixing process, water often gathers at the bottom of the mixing drum and cannot be stirred. Summary of the invention

[0003] The purpose of the present invention is to provide a hydraulic type forced twin-horizontal shaft concrete mixer to solve the problems existing in the prior art.

[0004] The technical solution adopted by the present invention to solve its technical problem is:

[0005] A hydraulic type forced twin-horizontal shaft concrete mixer comprises a base, a mixing drum and a discharge device. The mixing drum is mounted on the base, the discharge device is mounted at the discharge port at the bottom of the mixing drum, two baffle plates are fixed on the base on both sides of the discharge port, and the discharge device comprises:

[0006] The first end plate and the second end plate are connected to the mixing drum at both ends of the discharge port through the driving shaft and the hollow shaft bearing respectively, and the hollow shaft is provided with a plurality of slurry suction holes at the inner part of the mixing drum;

[0007] The cylinder has two ends hinged on the driving shaft and the mixing drum respectively;

[0008] A conversion cylinder, connecting the first end plate and the second end plate;

[0009] A limit switch is fixed to a base at the outer end of the drive shaft;

[0010] The induction plate is fixed to the outer end of the driving shaft;

[0011] The outer end of the hollow shaft is connected with a pneumatic diaphragm pump through a rotary joint, and the pneumatic diaphragm pump is connected with the top of the mixing drum through a pipeline.

[0012] Furthermore, the baffle plate is arc-shaped, the top ends of the two baffle plates are respectively close to the two sides of the discharge port, a discharge gap is formed between the bottom ends of the two baffle plates, and the two baffle plates are located between the first end plate and the second end plate and close to the conversion cylinder.

[0013] Furthermore, the conversion cylinder is generally in the shape of a circular tube, and is provided with two hollow end faces, a filter plate end face, and two blocking plate end faces. The hollow end faces have hollows, and the filter plate end faces have a number of through holes. The two hollow end faces are arranged opposite to each other, and one filter plate end face and one blocking plate end face are both arranged opposite to the other blocking plate end face.

[0014] Furthermore, the hollow shaft is in the shape of a hollow circular tube, the end of the hollow shaft located inside the mixing drum is closed, the rear side wall of the hollow shaft located inside the mixing drum is bent close to the end face of the blocking plate opposite to the end face of the filter plate, and the slurry suction hole faces the end face of the blocking plate.

[0015] Furthermore, a U-shaped connecting piece is fixed to the output end of the cylinder, an arc-shaped connecting plate is fixed to the outer end of the driving shaft, and the cylinder is hinged to the connecting plate on the driving shaft through the connecting piece.

[0016] Furthermore, the position of the limit switch corresponds to the moving trajectory of the sensor plate, and the position of the limit switch corresponds to the position of the end of the sensor plate when the end face of the filter plate coincides with the discharge port, the end face of the blocking plate coincides with the discharge port when the output end of the cylinder is not extended, and the hollow end face coincides with the discharge port when the output end of the cylinder is fully extended.

[0017] The present invention has the following beneficial effects:

[0018] 1. The present invention solves the industry problems of large blade resistance and easy breakage, and uneven mixing of slurry and water, and is particularly suitable for large-scale and efficient production of hydraulic rolled concrete. Through the synergistic effect of the internal circulation of the stirring blades and the external circulation of slurry and water, the slurry and water deposition at the bottom can be completely eliminated, thereby improving the uniformity of concrete.

[0019] 2. The conversion cylinder can switch between three states: blocking, discharging and draining. The structure is simple and easy to modify. The setting of the baffle plate can avoid leakage or loss of aggregate.

[0020] 3. The slurry suction hole design of the hollow shaft combined with the close layout of the baffle plate reduces the load on the blade connecting rod and extends the service life of the equipment.

[0021] 4. Energy consumption optimization: The pneumatic diaphragm pump is linked with the limit switch to start the external circulation only when the slurry water is deposited, thus reducing invalid energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of one side of the hollow shaft of the present invention.

[0023] Figure 2It is a schematic structural diagram of one side of the drive shaft of the present invention.

[0024] Figure 3 The present invention Figure 2 Enlarged structural diagram at A in the middle.

[0025] Figure 4 It is a schematic structural diagram of the unloading device of the present invention.

[0026] Figure 5 It is a schematic diagram of the disassembled structure of the unloading device of the present invention.

[0027] Figure 6 It is a schematic diagram of the top view of the structure of the dismantling device of the present invention.

[0028] Figure 7 It is a schematic diagram of the disassembled structure of the unloading device of the present invention.

[0029] Figure 8 It is a schematic diagram of the disassembled structure of the unloading device of the present invention.

[0030] Fig. 9 It is a schematic diagram of the disassembled structure of the unloading device of the present invention.

[0031] Among them: 1. Base; 2. Mixing drum; 3. Discharging device; 4. Discharging port; 5. Baffle plate; 6. First end plate; 7. Second end plate; 8. Driving shaft; 9. Hollow shaft; 10. Slurry suction hole; 11. Pneumatic diaphragm pump; 12. Rotary joint; 13. Cylinder; 14. Conversion cylinder; 15. Limit switch; 16. Induction plate; 17. Hollow end face; 18. Filter plate end face; 19. Blocking plate end face; 20. Hollow; 21. Through hole; 22. Connector; 23. Connecting plate; 24. Pipeline. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments and drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0033] like Figure 1-6 As shown, a hydraulic type forced twin-horizontal shaft concrete mixer comprises a base 1, a mixing drum 2, and a discharge device 3. The mixing drum 2 is mounted on the base 1, and the discharge device 3 is mounted at a discharge port 4 at the bottom of the mixing drum 2. Two baffle plates 5 are fixed on the base 1 on both sides of the discharge port 4. Two baffle plates 5 are fixed on the base 1 on both sides of the discharge port 4. The discharge device 3 comprises:

[0034] The first end plate 6 and the second end plate 7 are respectively connected to the mixing drum 2 at both ends of the discharge port 4 through the driving shaft 8 and the hollow shaft 9 bearings, so that the first end plate 6 and the second end plate 7 can rotate. The hollow shaft 9 is provided with a plurality of slurry suction holes 10 at the inside of the mixing drum 2, and the slurry suction holes 10 are used to suck away the slurry water inside the conversion drum 14.

[0035] The cylinder 13 has two ends respectively hinged on the driving shaft 8 and the mixing drum 2, and is used to drive the conversion drum 14 to rotate.

[0036] The conversion cylinder 14 is connected to the first end plate 6 and the second end plate 7, and can be converted into three states: blocking, discharging, and draining.

[0037] The limit switch 15 is fixed on the base 1 at the outer end of the driving shaft 8 and is used to control the action of the cylinder 13.

[0038] The induction sheet 16 is fixed to the outer end of the driving shaft 8 and is used together with the limit switch 15. The limit switch 15 controls the cylinder 13 to move after sensing the induction sheet 16.

[0039] The outer end of the hollow shaft 9 is connected to a pneumatic diaphragm pump 11 through a rotary joint 12. The pneumatic diaphragm pump 11 is connected to the top of the mixing drum 2 through a pipe 24. The pneumatic diaphragm pump 11 is used to pump out the slurry water in the conversion drum 14 and return it from the top of the mixing drum 2 through the pipe 24.

[0040] The baffle plates 5 are arc-shaped, the top ends of the two baffle plates 5 are respectively close to the two sides of the discharge port 4, and a gap for discharging is formed between the bottom ends of the two baffle plates 5. The two baffle plates 5 are located between the first end plate 6 and the second end plate 7 and close to the conversion cylinder 14. The baffle plates 5 are used to block the two sides of the conversion plate, and the conversion plate blocks the material to prevent leakage when rotating.

[0041] The conversion cylinder 14 is in the shape of a circular tube as a whole. The conversion cylinder 14 is provided with two hollow 20 end faces 17, a filter plate end face 18, and two blocking plate end faces 19. The hollow 20 end face 17 has a hollow 20, and the filter plate end face 18 has a plurality of through holes 21. The two hollow 20 end faces 17 are arranged opposite to each other, and one filter plate end face 18 and one blocking plate end face 19 are arranged opposite to the other blocking plate end face 19. The two hollow 20 end faces 17 are used for discharging materials, the blocking plate end face 19 is used to block the discharge port 4 and cooperate with the baffle plate 5 to contain slurry, and the filter plate end face 18 is used to block stones so that the slurry settled at the bottom of the mixing cylinder 2 leaks into the conversion cylinder 14.

[0042] The hollow shaft 9 is in the shape of a hollow circular tube. The end of the hollow shaft 9 located inside the mixing drum 2 is closed. The rear side wall of the portion of the hollow shaft 9 located inside the mixing drum 2 is bent close to the blocking plate end face 19 opposite to the filter plate end face 18, and the slurry suction hole 10 faces the blocking plate end face 19, so that the slurry water is sucked into the hollow shaft 9 from the slurry suction hole 10 and returns to the top of the mixing drum 2.

[0043] A U-shaped connecting piece 22 is fixed to the output end of the cylinder 13 , an arc-shaped connecting plate 23 is fixed to the outer end of the driving shaft 8 , and the cylinder 13 is hinged to the connecting plate 23 on the driving shaft 8 through the connecting piece 22 .

[0044] The position of the limit switch 15 corresponds to the moving trajectory of the sensor plate 16, and the position of the limit switch 15 corresponds to the position of the end of the sensor plate 16 when the end face 18 of the filter plate coincides with the discharge port 4. When the output end of the cylinder 13 is not extended, the end face 19 of the blocking plate coincides with the discharge port 4. When the output end of the cylinder 13 is fully extended, the hollow end face 17 of the hollow 20 coincides with the discharge port 4.

[0045] The working principle of the present invention is:

[0046] When in use, the cylinder 13, the limit switch 15, and the pneumatic diaphragm pump 11 are all electrically connected to the control system. When the output end of the cylinder 13 is not extended, it is in a blocking state, that is, the end face 19 of the blocking plate overlaps with the discharge port 4, thereby blocking the discharge port 4. When the output end of the cylinder 13 extends to a certain length, it is in a water discharge state, that is, the end face 18 of the filter plate overlaps with the discharge port 4 to block the stones, so that the slurry enters the conversion cylinder 14 from the discharge port 4, and then the pneumatic diaphragm pump 11 returns it to the top of the mixing drum 2 and throws it down to form an external circulation. When the output end of the cylinder 13 is fully extended, it is in a discharging state, that is, the end face 17 of the hollow 20 overlaps with the discharge port 4 to discharge the material. The extension length of the cylinder 13 is controlled by the limit switch 15, and the pneumatic diaphragm pump 11 is associated with the limit switch 15.

[0047] During feeding, the cylinder 13 does not extend and is in a blocking state. Figure 7 As shown, the end face 19 of the blocking plate coincides with the discharge port 4, the end face 17 of the hollow 20 and the end face 18 of the filter plate are located on both sides of the conversion cylinder 14, and the material blocking plate 5 blocks the material to prevent leakage. After the feeding is completed, stirring begins, and part of the water is turned over and thrown down by the blades to form a forced circulation in the mixing drum 2. The other part of the water cannot be turned over by the small blades and gathers at the bottom of the mixing drum 2. The external circulation function is started, the cylinder 13 extends, the conversion cylinder 14 rotates, and the induction sheet 16 is sensed after reaching the position of the limit switch 15, and the cylinder 13 stops moving. Figure 8As shown, the filter plate end face 18 coincides with the discharge port 4, and the slurry at the bottom of the mixing drum 2 enters the conversion drum 14 through the filter plate end face 18. Similarly, the hollow 20 end face 17 is located on the side of the conversion drum 14, and the baffle plate 5 blocks the material to prevent leakage. At this time, the slurry suction hole 10 on the hollow shaft 9 is located at the bottom of the conversion drum 14, and the pneumatic diaphragm pump 11 is started in conjunction. The slurry suction hole 10 on the hollow shaft 9 generates suction, and the slurry is drawn into the hollow shaft 9 and returned to the top of the mixing drum 2 through the pipe 24 to be thrown down, forming an external circulation, thereby improving the mixing efficiency. A water discharge interval can be set. After the time interval is reached, the cylinder 13 retracts and the conversion drum 14 rotates, thereby switching to a blocked state, and this is repeated. The mixing efficiency is improved by the internal circulation of the material and the external circulation of the slurry. When discharging, the output end of the cylinder 13 is fully extended, as shown in FIG. Fig. 9 As shown, the end face 17 of the hollow 20 coincides with the discharge port 4, and the concrete is discharged through the two hollows 20. It should be noted that when switching from the blocking state to the discharge state or from the discharge state to the blocking state, the induction sheet 16 passes through the limit switch 15, but the external circulation command is not executed at this time, so the limit switch 15 does not work, does not trigger the cylinder 13 to stop, and the pneumatic diaphragm pump 11 will not be started in conjunction.

[0048] The above embodiments are only for describing the preferred implementation of the present invention, and are not intended to limit the concept and scope of the present invention. Without departing from the design concept of the present invention, various modifications and improvements made by ordinary persons in the art to the technical solution of the present invention should fall within the protection scope of the present invention.

[0049] The techniques, shapes, and structural parts not described in detail in the present invention are all well-known techniques.

Claims

1. A hydraulic type forced twin-horizontal shaft concrete mixer, comprising a base, a mixing drum, and a discharge device, wherein the mixing drum is mounted on the base, and the discharge device is mounted at the discharge port at the bottom end of the mixing drum, characterized in that: Two baffle plates are fixed on the bases on both sides of the discharge port, and the discharge device includes: The first end plate and the second end plate are connected to the mixing drum at both ends of the discharge port through the driving shaft and the hollow shaft bearing respectively, and the hollow shaft is provided with a plurality of slurry suction holes at the inner part of the mixing drum; The cylinder has two ends hinged on the driving shaft and the mixing drum respectively; A conversion cylinder, connecting the first end plate and the second end plate; A limit switch is fixed to a base at the outer end of the drive shaft; The induction plate is fixed to the outer end of the driving shaft; The outer end of the hollow shaft is connected with a pneumatic diaphragm pump through a rotary joint, and the pneumatic diaphragm pump is connected with the top of the mixing drum through a pipeline.

2. The hydraulic forced twin-horizontal shaft concrete mixer according to claim 1, characterized in that: The baffle plates are arc-shaped, the top ends of the two baffle plates are respectively close to the two sides of the discharge port, a discharge gap is formed between the bottom ends of the two baffle plates, and the two baffle plates are located between the first end plate and the second end plate and close to the conversion cylinder.

3. The hydraulic forced twin-horizontal shaft concrete mixer according to claim 1, characterized in that: The conversion cylinder is in the shape of a circular tube as a whole, and is provided with two hollow end faces, a filter plate end face, and two blocking plate end faces. The hollow end face has hollows, and the filter plate end face has a plurality of through holes. The two hollow end faces are arranged opposite to each other, and one filter plate end face and one blocking plate end face are both arranged opposite to the other blocking plate end face.

4. The hydraulic forced twin-horizontal shaft concrete mixer according to claim 3, characterized in that: The hollow shaft is in the shape of a hollow circular tube, the end of the hollow shaft located inside the mixing drum is closed, the rear side wall of the hollow shaft located inside the mixing drum is bent close to the end face of the blocking plate opposite to the end face of the filter plate, and the slurry suction hole faces the end face of the blocking plate.

5. The hydraulic forced twin-horizontal-shaft concrete mixer according to claim 1, characterized in that: A U-shaped connecting piece is fixed to the output end of the cylinder, an arc-shaped connecting plate is fixed to the outer end of the driving shaft, and the cylinder is hinged to the connecting plate on the driving shaft through the connecting piece.

6. The hydraulic forced twin-horizontal shaft concrete mixer according to claim 1, characterized in that: The position of the limit switch corresponds to the moving trajectory of the sensor plate, and the position of the limit switch corresponds to the position of the end of the sensor plate when the end face of the filter plate coincides with the discharge port, the end face of the blocking plate coincides with the discharge port when the output end of the cylinder is not extended, and the hollow end face coincides with the discharge port when the output end of the cylinder is fully extended.

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