Double-shaft stirrer

Abstract

The utility model discloses a double-shaft stirring machine which comprises a stirring machine shell, two stirring shafts are arranged in the stirring machine shell side by side in the length direction, the outer ends of the same sides of the two stirring shafts penetrate out of the stirring machine shell to be connected with a power assembly, and stirring blades are installed on the stirring shafts. The stirring blades comprise forward blade groups and reverse blade groups, the direction of the blades of the forward blade groups faces the power assembly, the number of the forward blade groups is larger than that of the reverse blade groups, and the reverse blade groups are arranged between the forward blade groups; a feeding port is formed in the upper side wall, far away from the power assembly, of the stirrer shell, a discharging port is formed in the lower side wall, close to the power assembly, of the stirrer shell, and the opening of the feeding port is larger than that of the discharging port. The blade groups in different directions are arranged on the stirring shaft, and the proportion is reasonably controlled, so that the uniform mixing efficiency can be improved, the material stirring effect is improved, the use amount of an additive is reduced, and the later strength of a product is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of pelletizing and mixing equipment, specifically to a twin-shaft mixer. Background Technology

[0002] A twin-shaft mixer is a device used for uniformly moistening dry ash powder and other materials. It utilizes the synchronous rotation of two symmetrical mixing shafts to simultaneously convey dry ash powder and add water for mixing, uniformly moistening the material. This achieves the goal of preventing the humidified material from oozing dry ash or seeping water droplets, thus facilitating loading and transportation of the moistened ash or its transfer to other conveying equipment. It is mainly suitable for industries such as thermal power plants and mines.

[0003] Twin-shaft mixers are currently widely used. The mixing blades are installed on the mixing shaft of the mixer. During the operation of the equipment, the material is pushed forward by the blades. The mixing effect is produced by the friction between the materials and the gap between the blades, so the mixing effect is relatively poor. Utility Model Content

[0004] To solve the above technical problems, this utility model provides a twin-shaft mixer that can improve the mixing effect.

[0005] The technical solution is as follows: A twin-shaft mixer includes a mixer housing, within which two mixing shafts are arranged side-by-side in the elongation direction. The outer ends of the two mixing shafts on the same side both extend out of the mixer housing and are connected to a power component. The key point is that mixing blades are installed on the mixing shafts. The mixing blades include a forward blade group and a reverse blade group, wherein the direction of the blades in the forward blade group faces the power component, the number of forward blade groups is greater than the number of reverse blade groups, and the reverse blade groups are arranged between the forward blade groups.

[0006] The mixer casing has a feed inlet on the upper side wall away from the power component and a discharge outlet on the lower side wall near the power component. The opening of the feed inlet is larger than the opening of the discharge outlet. With this structure, the material to be mixed enters the mixer through the feed inlet, is mixed, and then discharged through the discharge outlet. The mixing shaft is equipped with mixing blades in opposite directions, which effectively improves mixing efficiency and provides a strong mixing effect, especially for materials between the forward and reverse blade groups. Furthermore, the mixing time can be adjusted by changing the ratio of the forward and reverse mixing blades according to different materials, making it more versatile.

[0007] Preferably, a plurality of bushings are fitted onto the stirring shaft, and a jacket is welded circumferentially to the outer wall of the bushing. The blades of the stirring blades are connected to the bushings through the jackets. With the above structure, the bushings are connected to the stirring blades through the jackets, forming a circumferential stirring blade assembly. Furthermore, the stirring blades can be replaced or their direction adjusted according to different situations, making operation convenient.

[0008] Preferably, a fixing hole is provided on the bushing, and an adjusting hole is provided on the stirring shaft corresponding to the fixing hole. A screw is inserted into the fixing hole and the adjusting hole, and a nut is provided on the protruding end of the screw. With the above structure, the bushing is connected to the stirring shaft by inserting a screw into the fixing hole and the adjusting hole, and further secured by the nut, which can prevent the bushing from detaching from the stirring shaft during use.

[0009] Preferably, the number of adjustment holes is greater than the number of bushings, and unused adjustment holes are fitted with plugs. With this structure, the bushings can be adapted to adjustment holes in different positions, allowing for adjustment of the distance between blade groups according to different situations, thus accommodating the mixing of various materials. The plugs prevent materials from entering the interior of the mixing shaft.

[0010] Preferably, the type of stirring blades includes long blades and short blades, wherein the number of blades in the reverse blade group installed on the stirring shaft shall not exceed 30% of the total number of stirring blades. With this structure, the type of stirring blades can be rationally selected according to the material being stirred, avoiding blades that are too short, preventing the material at the bottom from being mixed evenly and from being pushed towards the outlet, or blades that are too long and collide with the inner wall of the mixer, damaging the blades. Rational control of the number of reverse stirring blades can effectively improve the mixing effect and ensure that the material reaches the discharge position.

[0011] Preferably, the power assembly includes a motor and a reducer. The output end of the motor is connected to the reducer, and the output end of the reducer is connected to one of the stirring shafts. A first gear is fitted at the connection between the reducer and the stirring shaft, and a second gear is provided on one side of the first gear, meshing with the first gear. The other stirring shaft extends into the second gear. With this structure, the motor provides power for the rotation of the stirring shaft, the reducer lowers the rotation frequency of the motor, and the first and second gears act as a transition transmission, transmitting the power generated by the motor to the stirring shaft to make it rotate, thereby stirring the material.

[0012] Preferably, both ends of the two stirring shafts extend beyond the mixer housing, and bearings are provided at both ends of the extended stirring shafts. One of the bearings is located between the first gear, the second gear, and the mixer housing. This structure supports the stirring shafts, ensures their normal rotation, reduces friction, and allows for smoother rotation.

[0013] Preferably, four observation ports are provided on the upper and side parts of the mixer casing, with the side observation ports located between the feed inlet and the discharge outlet, and the upper observation port located above the discharge outlet. This structure allows for observation of the interior of the mixer through the observation ports.

[0014] Preferably, a water pipe is also provided on the upper part of the mixer casing. The water pipe is arranged between the feed inlet and the upper observation port. Small water inlet pipes are provided on both sides of the centerline of the water pipe, with the inlet end of each small water inlet pipe connected to the water pipe and its outlet end extending into the mixer casing. This structure allows for controlled water addition to the powdery material inside the mixer, achieving uniform humidification of the dry ash powder, ensuring that the humidified material neither overflows with dry ash nor leaks water droplets.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: by setting blade groups in different directions on the stirring shaft and reasonably setting the ratio of forward and reverse blade groups, the mixing efficiency of the twin-shaft mixer is improved, the mixing effect of materials is improved, the amount of additives used is reduced, the strength of the product in the later stage is increased, and the number of forward and reverse blade groups can be adjusted according to different materials, thereby achieving the purpose of adjusting the mixing time. It has strong versatility. Attached Figure Description

[0016] Figure 1 This is a front view of the present invention;

[0017] Figure 2 This is a top view of the present invention;

[0018] Figure 3 for Figure 1 Sectional view of AA;

[0019] Figure 4 This is a diagram of the internal structure of the present invention;

[0020] Figure 5 for Figure 4 An enlarged diagram of A in the diagram. Detailed Implementation

[0021] The present invention will be further described below with reference to the embodiments and accompanying drawings.

[0022] like Figures 1 to 5As shown, a twin-shaft mixer includes a mixer housing 1. Two mixing shafts 2 are arranged side-by-side along the longitudinal direction within the mixer housing 1. The outer ends of both mixing shafts 2 extend out of the mixer housing 1 on the same side and are connected to a power component. Mixing blades 3 are mounted on the mixing shafts 2. A plurality of mixing blades 3 are installed, including forward-facing blade groups and reverse-facing blade groups. The forward-facing blade groups face towards the power component. The number of forward-facing blade groups is greater than the number of reverse-facing blade groups, and the reverse-facing blade groups are distributed among the forward-facing blade groups. This arrangement of forward and reverse blade groups effectively improves the mixing effect of materials. The mixing time can be adjusted by changing the number of forward and reverse blade groups according to different materials, making it highly versatile.

[0023] The mixer housing 1 has a feed inlet 1a on the upper side wall away from the power component and a discharge outlet 1b on the lower side wall near the power component. The opening of the feed inlet 1a is larger than the opening of the discharge outlet 1b. The material enters the mixer from the feed inlet 1a, is mixed and stirred, and then discharged through the discharge outlet 1b.

[0024] Several bushings 4 are fitted on the stirring shaft 2. A jacket 401 is welded circumferentially on the outer wall of the bushing 4. The blades of the stirring blade 3 are connected to the bushings 4 through the jacket 401 to form a circumferential blade group, which facilitates the replacement of the stirring blade 3 and the adjustment of the direction of the stirring blade.

[0025] A mounting hole 402 is provided on the bushing 4, and an adjustment hole 201 is provided on the stirring shaft 2 corresponding to the mounting hole 402. A screw 403 is inserted into the mounting hole 402 and the adjustment hole 201, and a nut is provided on the extended end of the screw 403 to realize the connection between the bushing 4 and the stirring shaft 2.

[0026] The number of adjustment holes 201 is greater than the number of bushings 4, and unused adjustment holes 201 are fitted with plugs 202. The more adjustment holes 201 there are, the more the distance between bushings 4 can be adjusted according to different materials. If the material particles are small, and more uniform mixing is required, the number of bushings 4 can be increased and the distance between bushings 4 can be reduced. If the material particles are large, the number of bushings 4 can be reduced and the distance between bushings 4 can be increased, thereby ensuring the material mixing efficiency. The plugs 202 can prevent materials from entering the interior of the stirring shaft 2.

[0027] The type of stirring blade 3 includes long blades and short blades. The setting of the stirring blade 3 in the mixer needs to be analyzed according to the length and output of the mixer. It can be set as a long blade structure, a short blade structure, or an alternating long and short blade structure. If the stirring blade 3 is a short blade, it will be too far from the bottom, and the material at the bottom will be mixed unevenly and will not be able to move the material at the bottom towards the outlet. If the stirring blade 3 is too close to the bottom, the outer end of the stirring blade 3 is very likely to collide with the outer wall, causing damage to the stirring blade 3.

[0028] The ratio of forward stirring blades to reverse stirring blades can be adjusted appropriately to control the stirring time. The number of reverse stirring blades installed on the stirring shaft 2 should not exceed 30% of the total number of blades of the stirring blades 3, so as to ensure that the blades 4 can push the material to move in the outlet direction.

[0029] The power assembly includes a motor 5 and a reducer 6. The output end of the motor 5 is connected to the reducer 6, and the output end of the reducer 6 is connected to one of the stirring shafts 2. A first gear 7 is fitted at the connection between the reducer 6 and the stirring shaft 2. A second gear 10 is provided on one side of the first gear 7 and meshes with the first gear 7. The other stirring shaft 2 extends into the second gear 10. The motor 5 can provide power to the stirring shaft 2. The reducer 6, the first gear 7, and the second gear 10 play a transitional transmission role, transmitting the power generated by the motor 5 to the stirring shaft 2 to make it rotate, thereby stirring the material.

[0030] Both ends of the two stirring shafts 2 extend out of the mixer housing 1. Bearings 9 are provided on both extended ends of the stirring shafts 3, with one bearing 9 positioned between the first gear 7, the second gear 10, and the mixer housing 1. The bearings 9 support the stirring shafts 2, reduce the coefficient of friction of the mechanical load during transmission, fix and reduce the coefficient of friction, ensure the normal operation of mechanical components, and reduce friction for smoother rotation. By reducing friction, the bearings 9 reduce energy consumption, improve equipment operating efficiency, and extend the machine's service life.

[0031] The upper and side parts of the mixer housing 1 are also provided with observation ports 1c. There are four observation ports 1c, of which the side observation port 1c1 is located between the feed port 1a and the discharge port 1b, and the upper observation port 1c2 is located above the discharge port 1b. The internal condition of the mixer can be observed through the observation ports 1c.

[0032] A water pipe 8 is also provided on the upper part of the mixer shell 1. The water pipe 8 is arranged between the feed inlet 1a and the upper observation port 1c2. Small water inlet pipes 801 are provided on both sides of the center line of the water pipe 8. The water inlet end of the small water inlet pipe 801 is connected to the water pipe 8, and its water outlet end extends into the mixer shell 1. Water can be added to the powdery material inside according to the observation of the observation port 1c, so as to achieve the purpose of mixing and moistening the dry ash powdery material, so as to achieve the purpose of preventing the moistened material from oozing dry ash and preventing water droplets from seeping out, which is convenient for later use.

[0033] This invention randomly selects a mixer with a total of 30 mixing blades. The blades are numbered sequentially from the material inlet to the outlet as: Group 1, Group 2... Group 30. The positive direction of material movement is marked "X", and the negative direction is marked "-X". Blades in Groups 3, 6, ... 24 and 27 are adjusted to reverse-direction blades, while the remaining blades are forward-direction blades. The material will be more effectively mixed in Groups 2 and 3, Groups 5 and 6, ... Groups 26 and 27, improving the mixing quality, thus enhancing the mixing effect, reducing the amount of additives used, and increasing the final strength of the product.

[0034] Finally, it should be noted that the above description is merely a preferred embodiment of the present utility model. Those skilled in the art, under the guidance of the present utility model, can make various similar representations without departing from the spirit and claims of the present utility model, and such modifications all fall within the protection scope of the present utility model.

Claims

1. A twin-shaft mixer, comprising a mixer housing (1), wherein two mixing shafts (2) are arranged side-by-side in the longitudinal direction within the mixer housing (1), and the outer ends of the two mixing shafts (2) on the same side both extend out of the mixer housing (1) and are connected to a power assembly, characterized in that: A plurality of stirring blades (3) are installed on the stirring shaft (2). The stirring blades (3) include a forward blade group and a reverse blade group, wherein the direction of the blades of the forward blade group is towards the power component, the number of the forward blade group is greater than the number of the reverse blade group, and the reverse blade group is distributed among the forward blade groups. The mixer housing (1) has an inlet (1a) on the upper side wall away from the power component and an outlet (1b) on the lower side wall near the power component. The opening of the inlet (1a) is larger than the opening of the outlet (1b).

2. The twin-shaft mixer according to claim 1, characterized in that: A plurality of bushings (4) are fitted on the stirring shaft (2), and a jacket (401) is welded circumferentially on the outer wall of the bushing (4). The blades of the stirring blade (3) are connected to the bushings (4) through the jacket (401).

3. A twin-shaft mixer according to claim 2, characterized in that: A mounting hole (402) is provided on the bushing (4), and an adjustment hole (201) is provided on the stirring shaft (2) corresponding to the mounting hole (402). A screw (403) is inserted into the mounting hole (402) and the adjustment hole (201), and a nut is provided on the extended end of the screw (403).

4. A twin-shaft mixer according to claim 3, characterized in that: The number of adjustment holes (201) is greater than the number of bushings (4), and plugs (202) are installed on the unused adjustment holes (201).

5. A twin-shaft mixer according to claim 1 or 2, characterized in that: The type of stirring blade (3) includes long blades and short blades, and the number of blades in the reverse blade group installed on the stirring shaft (2) shall not exceed 30% of the total number of blades of the stirring blade (3).

6. A twin-shaft mixer according to claim 1, characterized in that: The power assembly includes a motor (5) and a reducer (6). The output end of the motor (5) is connected to the reducer (6). The output end of the reducer (6) is connected to one of the stirring shafts (2). A first gear (7) is sleeved at the connection between the reducer (6) and the stirring shaft (2). A second gear (10) is provided on one side of the first gear (7). The second gear (10) meshes with the first gear (7). The other stirring shaft (2) extends into the second gear (10).

7. A twin-shaft mixer according to claim 6, characterized in that: Both ends of the two stirring shafts (2) extend out of the mixer housing (1), and bearings (9) are provided on both ends of the stirring shafts (2). One of the bearings (9) is located between the first gear (7), the second gear (10) and the mixer housing (1).

8. A twin-shaft mixer according to claim 1, characterized in that: An observation port (1c) is provided on the upper and side parts of the mixer shell (1). There are four observation ports (1c), of which the side observation port (1c1) is located between the feed port (1a) and the discharge port (1b), and the upper observation port (1c2) is located above the discharge port (1b).

9. A twin-shaft mixer according to claim 8, characterized in that: A water pipe (8) is also provided on the upper part of the mixer shell (1). The water pipe (8) is arranged between the feed inlet (1a) and the upper observation port (1c2). Small water inlet pipes (801) are provided on both sides of the center line of the water pipe (8). The water inlet end of the small water inlet pipe (801) is connected to the water pipe (8), and its outlet end extends into the mixer shell (1).

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