Ejector and coal slurry injection type turbine composite stirring blade device

Abstract

The utility model relates to the field of coal slurry stirring, in particular to a coal slurry injection type turbine composite stirring blade device. The ejector is characterized by comprising an inlet I, a contraction section and an expansion section, and the inlet I, the contraction section and the expansion section are fixedly connected in sequence; a coal slurry injection type turbine composite stirring blade device comprises an injector, a blade fixing disc and paddles. Paddle blades are evenly distributed on the blade fixing disc in the circumferential direction, and ejectors are fixed to the outer ends of the paddle blades. When in use, the ejector can increase the impact force of the mixed coal slurry, and the mixed coal slurry impacts on the tank body, so that the mixed coal slurry is further uniformly mixed; according to the coal slurry injection type turbine composite stirring blade device, on the basis that the blades rotate to stir, the ejector provides power for the device through rotation of the blades, effective mixing of central materials and peripheral materials is achieved through the ejector, material deposition at the bottom and corners of a coal slurry tank is reduced, and the uniformity and stability of coal slurry are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of coal slurry stirring, in particular to an ejector and a coal slurry ejection type turbine compound stirring blade device. Background Art

[0002] Since coal slurry has high viscosity, is easy to precipitate and difficult to stir evenly, a continuously rotating agitator is required in the coal slurry tank. Generally, double-layer paddle stirring is used. However, there are often places on the coal slurry tank wall and the edge of the bottom that cannot be stirred, resulting in low efficiency and easy formation of deposits on the tank wall and the edge of the bottom.

[0003] Therefore, it is necessary to provide a new coal slurry jet turbine compound stirring blade to solve the above technical problems. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides an ejector and a coal slurry ejection type turbine compound stirring blade device;

[0005] The utility model provides one of the technical solutions: an ejector, comprising an inlet I, a contraction section and an expansion section, wherein the inlet I, the contraction section and the expansion section are fixedly connected in sequence, and the inner diameter of the contraction section is smaller than the inner diameter of the inlet I; the expansion section is in the shape of a bell mouth that opens outward or downward and tilts outward or downward.

[0006] Preferably, the angle between the center line of the expansion section and the center line of the contraction section is between 5 and 45 degrees.

[0007] The utility model provides a second technical solution: a coal slurry injection turbine compound stirring blade device, comprising an injector, a blade fixing disk and a blade; the blade fixing disk is evenly distributed on the circumference thereof, and the outer end of the blade is fixed with an injector.

[0008] Preferably, a suction pipe is fixed on the back of the blade, an inlet II is provided on the contraction section corresponding to the suction pipe, and the suction pipe is connected to the inlet II through a pipe joint.

[0009] Preferably, an open groove is provided on the blade fixing disc corresponding to the suction pipe, and is fixedly connected to a pipe clamp beside the open groove, and the inner end of the suction pipe is fixedly connected to the blade fixing disc through the pipe clamp.

[0010] Preferably, an axial hole is provided in the middle of the blade fixing disc, and a keyway is provided in the axial hole.

[0011] Preferably, the blade has a cambered surface.

[0012] Compared with the related art, the injector and coal slurry injection turbine compound stirring blade device provided by the utility model have the following beneficial effects:

[0013] 1. Effect of the ejector: The coal slurry in the center of the tank body enters the contraction section of the ejector from inlet II through the pipe joint and the suction pipe. At the same time, the coal slurry around the tank body enters inlet I and flows to the contraction section of the ejector and is mixed with the coal slurry from inlet II. The coal slurry is then rotated and thrown out through the expansion section, which can increase the impact force of the mixed coal slurry. The mixed coal slurry hits the tank body, making the mixed coal slurry further evenly mixed.

[0014] 2. The coal slurry jet turbine compound stirring blade device adds an ejector based on the use of blade rotation stirring. The ejector relies on the rotation of the blades to provide it with power, and no additional power is required. The ejector realizes the effective mixing of the central material and the peripheral material, reduces the material deposition at the bottom and corners of the coal slurry tank, and improves the uniformity and stability of the coal slurry. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of Example 2;

[0016] Figure 2 It is a structural schematic diagram of Example 1;

[0017] Numbers in the figure: 1. blade fixing disc; 2. paddle; 3. ejector; 301. inlet I; 302. contraction section; 303. expansion section; 304. inlet II; 4. pipe joint; 5. suction pipe; 6. pipe clamp. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0019] The specific implementation of the present utility model is described in detail below in conjunction with specific embodiments.

[0020] Embodiment 1:

[0021] See also Figure 1 to Figure 2, an injector provided by Example 1 of the utility model, the injector 3 comprises an inlet I301, a contraction section 302 and an expansion section 303, and the inlet I301, the contraction section 302 and the expansion section 303 are fixedly connected in sequence, the inner diameter of the contraction section 302 is smaller than the inner diameter of the inlet I301; the expansion section 303 is opened outward or downward, and the angle between the center line of the expansion section 303 and the center line of the contraction section 302 is between 5-45 degrees, and the coal slurry enters the injector 3 from the inlet I301. Since the diameter of the inlet I301 is larger than that of the contraction section 302, the pressure of the coal slurry increases when it flows from the inlet I301 to the contraction section 302. When the coal slurry flows through the contraction section 302, the pressure is converted into speed, and then it is rotated and thrown out through the expansion section 303 to increase the impact force of the mixed coal slurry.

[0022] Embodiment 2:

[0023] See also Figure 1 to Figure 2 , a coal slurry injection turbine compound stirring blade device provided in Example 2 of the utility model comprises an injector 3, a blade fixing disc 1, and a blade 2; the blade fixing disc 1 is evenly distributed with blades 2 and injectors 3 on the circumference, and the injector 3 is connected to and fixed at the outer end of the blade 2;

[0024] Based on the above Example 2, please refer to Figure 1 and Figure 2 A suction pipe 5 is fixed on the back of the blade 2, and an inlet II304 is arranged on the contraction section 302 corresponding to the suction pipe 5, and the suction pipe 5 is connected to the inlet II304 through a pipe joint 4; when in use, the coal slurry injection turbine compound stirring blade device is installed in a tank and is equipped with a rotating power mechanism; when the coal slurry in the tank is stirred, when the blade rotates, the lower surface of the blade will push the fluid to move upward, forming an upward flow, and the upper surface of the blade will form a downward flow due to the viscosity of the fluid, and the coal slurry in the center of the tank body is thrown into the inlet II304 through the pipe joint 4 and the suction pipe 5 during the rotation process to enter the contraction section 302 of the ejector 3. At the same time, the coal slurry around the tank body enters the inlet I301 and flows to the contraction section of the ejector 3 and is mixed with the inlet II, and then rotates and is thrown out through the expansion section 303 to increase the impact force of the mixed coal slurry, and the mixed coal slurry hits the tank body, so that the mixed coal slurry is further evenly mixed.

[0025] Based on the above Example 2, please refer to Figure 1 to Figure 2 The blade fixing disc 1 corresponding to the suction pipe 5 is provided with an open groove, which plays a welding positioning role for the installation of the pipe clamp and the blade; a pipe clamp 6 is fixedly connected next to the open groove, and the inner end of the suction pipe 5 is fixedly connected to the blade fixing disc 1 through the pipe clamp 6, which further fixes the suction pipe 5;

[0026] Based on the above Example 2, please refer to Figure 1 to Figure 2The blade fixing disc 1 has an axial hole in the middle, and a keyway is provided in the axial hole; the hollow blade 2 fixedly connected to the blade fixing disc 1 is designed with an arc surface to reduce the blade resistance;

[0027] It should be noted that: the rotation of the hollow blade 2 provides inlet power for the ejector 3, and at the same time, the material near the blade tip enters the ejector 3 from the inlet I301; in the ejector 3, the injection flow rate is high, and the pressure is converted into speed, so that the pressure in the contraction section 302 (intake area) is reduced, and the material near the center of the stirring shaft is sucked in by the suction pipe I5 and the suction pipe II4, and the two streams of material are mixed in the contraction section of the ejector; in the expansion section 303, the speed is reduced and the pressure is increased, which is more conducive to diffusion to the edge of the container, thereby making the material mixing more uniform.

[0028] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An ejector, characterized in that: The invention comprises an inlet I (301), a contraction section (302) and an expansion section (303), wherein the inlet I (301), the contraction section (302) and the expansion section (303) are fixedly connected in sequence, and the inner diameter of the contraction section (302) is smaller than the inner diameter of the inlet I (301); and the expansion section (303) is in the shape of a trumpet opening outward or downward and tilting outward or downward.

2. The injector according to claim 1, characterized in that: The angle between the center line of the expansion section (303) and the center line of the contraction section (302) is between 5 and 45 degrees.

3. A coal slurry injection turbine compound stirring blade device using the injector according to claim 1 or 2, characterized in that: The invention comprises an ejector (3), a blade fixing disc (1) and a blade (2); the blade fixing disc (1) is evenly distributed with the blade (2) and the ejector (3) on the circumference, the ejector (3) is fixed on the outer end of the blade (2), and the ejector (3) rotates with the blade (2).

4. The coal slurry injection turbine compound stirring blade device according to claim 3, characterized in that: A suction pipe (5) is fixed on the back of the blade (2), an inlet II (304) is provided on the contraction section (302) corresponding to the suction pipe (5), and the suction pipe (5) and the inlet II (304) are connected via a pipe joint (4).

5. The coal slurry injection turbine compound stirring blade device according to claim 4, characterized in that: An open slot is provided on the blade fixing disc (1) corresponding to the suction pipe (5), and a pipe clamp (6) is installed beside the open slot. The inner end of the suction pipe (5) is fixedly connected to the blade fixing disc (1) through the pipe clamp (6).

6. The coal slurry injection turbine compound stirring blade device according to claim 3, characterized in that: A shaft hole is arranged in the middle of the blade fixing disc (1), and a key groove is arranged in the shaft hole.

7. The coal slurry injection turbine compound stirring blade device according to claim 4 or 5, characterized in that: A shaft hole is arranged in the middle of the blade fixing disc (1), and a key groove is arranged in the shaft hole.

8. The coal slurry injection turbine compound stirring blade device according to claim 3, characterized in that: The blade (2) is a cambered blade or a sheet-shaped blade.

9. The coal slurry injection turbine compound stirring blade device according to claim 4, 5 or 6, characterized in that: The blade (2) is a cambered blade or a sheet-shaped blade.

10. The coal slurry injection turbine compound stirring blade device according to claim 7, characterized in that: The blade (2) is a cambered blade or a sheet-shaped blade.

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