CN218166749U - Mixer (mixing) shaft sealing device and mixer - Google Patents

Abstract

The utility model discloses a (mixing) shaft sealing device and mixer relates to a sealing device, has solved the unsatisfactory problem of current mixer (mixing) shaft seal effect, and its technical scheme main points are: a sealing device of a stirring shaft comprises a sealing ring which is sleeved on the stirring shaft; the sealing ring comprises an upper sealing ring and a lower sealing ring, and the upper sealing ring is in contact with the lower sealing ring; at least one annular cavity is formed at the contact part of the upper sealing ring and the lower sealing ring; the annular cavity is used for filling lubricating grease. And a better sealing effect is achieved.

Description

Mixer (mixing) shaft sealing device and mixer

Technical Field

The utility model relates to a sealing device, more specifically say that it relates to a mixer (mixing) shaft sealing device and mixer.

Background

With the vigorous development of the building industry, various artificial stones are more and more abundant in the market, and mixers for stirring stone materials are also continuously developed. However, the conventional stone mixer mainly has the following problems.

The stirring paddle moves under the driving of the stirring shaft. The stirring shaft is typically arranged on a planet wheel. The stirring shaft revolves along the axis of the stirring box and rotates along the axis of the stirring shaft. In the rotating process, dust and slurry in the stirring box easily enter the rotating device along the gap between the end sealing cover of the stirring shaft and the stirring shaft under the action of centrifugal force. Thus causing damage to bearings, gears, and the like. As shown in fig. 1, in the prior art, a sealing ring is generally arranged at the joint, and the material is prevented from entering the rotating device by the sealing ring. In the operation process, the sealing ring and the stirring shaft slide relatively. In long-term operation, the materials still have a great chance to enter the rotating device. The existing sealing device has unsatisfactory sealing effect.

1. The stone material stirring machine is generally a vertical shaft stirring machine, the driving mode is single motor driving, and the motor is directly connected with a speed reducing transmission system in the stirring machine. Adopt single motor drive, decelerator and rotating device among the drive arrangement all are in the equipment box, cause the huge complicacy of equipment box inner structure, if spare part among the speed reduction transmission system damages, must stop work and stop production, move about lifting device, tear down mixer lid and transmission system structure and change, installation, maintenance are extremely inconvenient, and maintenance duration is longer, and cost of maintenance is high.

2. In the stone material stirring machine in the prior art, a material inlet pipe is annularly arranged in a stirring box or outside the stirring box, a plurality of material outlets are arranged on the material inlet pipe, and liquid materials can be placed into the material outlet pipes from the box body. The location of the feed pipe ring will be close to the edge of the mixing box due to the mixing system in the middle of the mixing tank. The raw materials discharged from the discharge port can fall into the edge of the stirring box, and the falling point of the materials is relatively fixed. The raw materials still include some auxiliary materials, and the materials of auxiliary material are few, are difficult for with other raw materials misce benes, and the edge of agitator tank that drops is difficult for mixing with middle material under the effect of stirring rake, so the time of stirring can increase, influences production efficiency.

4. Because part of the raw materials in the stone have certain corrosiveness, parts in the stirrer are made of carbon steel, and the stone is easy to corrode if rust prevention treatment is not performed. Different stone materials are produced, colors and materials are strictly distinguished, and pollution cannot be caused. Different stones are produced each time, and the stirrer needs to be completely cleaned before the raw materials are replaced. The interior of the stirrer must be specially treated for rust prevention to prevent the components from rusting and polluting the stone materials. The traditional rust-proof treatment mode is to coat special rust-proof paint on each exposed part in the stirrer, but the manufacturing process is complex, the paint can be peeled off after long-time use, and the risk of rusting still exists; and the special antirust paint has certain toxicity.

5. When the discharging door of the stirrer is closed, the oil cylinder uses thrust, the piston rod extends out, and when the discharging door is opened, the oil cylinder uses pull force and the piston rod retracts. In the production process of the stirring machine, the closing time of the discharge door is long, and the piston rod is exposed outside for a long time and is easy to be infected with dust and impurities, pollute hydraulic oil and damage the oil cylinder and the hydraulic valve.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a mixer (mixing) shaft sealing device and mixer reaches sealed effect better.

The above technical purpose of the present invention can be achieved by the following technical solutions: a sealing device of a stirring shaft comprises a sealing ring which is sleeved on the stirring shaft; the sealing ring comprises an upper sealing ring and a lower sealing ring, and the upper sealing ring is in contact with the lower sealing ring; at least one annular cavity is formed at the contact part of the upper sealing ring and the lower sealing ring; the annular cavity is used for filling lubricating grease.

In the prior art, only a sealing ring form is adopted, the sealing ring and the stirring shaft slide relatively, and dust and slurry in the stirring box still have a greater chance to enter a bearing or a gear in the sliding process, so that equipment is damaged. The technology adopts the sealing ring, and the cavity for filling lubricating grease is arranged in the middle of the sealing ring. Although the upper sealing ring and the lower sealing ring can move relatively, lubricating grease is filled in the cavity, so that the lubricating effect is achieved, dust and slurry can be prevented from entering the bearing or the gear, and the reliability of the equipment is greatly improved. The grease of the present invention refers to a grease having a relatively high density, such as butter, and is not limited to a specific type. Therefore, the technical effect is within the protection scope of the patent.

Furthermore, a plurality of annular cavities which are arranged in a staggered mode are arranged, and the positions of the annular cavities are not on the same horizontal plane.

The cross section of the annular cavity can be square, and can also be round or triangular. When the plurality of annular cavities are not in the same plane, the contact surface of the upper sealing ring and the lower sealing ring is concave-convex. The cross-section of the sealing ring along the centre line may show a cuspidal profile of the contact lines. At this time, for example, external dust and slurry enter the inside of the sealing ring, and need to go through a longer route, so that a better sealing effect can be achieved.

The utility model also provides a stirrer, which comprises a stirring box and an equipment box, wherein the equipment box is positioned above the stirring box, the equipment box is used for installing a driving device and a rotating device, and the rotating device is connected with the stirring paddle and is provided with at least two driving devices; the driving device comprises a motor and a speed reducer, the motor and the speed reducer are arranged above the equipment box, and an output shaft of the motor is connected with an input shaft of the speed reducer; an output shaft of the speed reducer is connected with an output gear; the rotating device comprises a slewing bearing, a planet carrier, a planet wheel and a sun wheel; the outer ring of the slewing bearing is connected with the equipment box, and the inner teeth of the inner ring of the slewing bearing are connected with an output gear of the speed reducer; the inner ring is connected with a planet carrier, and at least two planet wheels are arranged on the planet carrier; the planet wheel is connected with the sun wheel; the sun wheel is connected with the equipment box; the planet wheel is arranged on the stirring shaft, and the stirring shaft is connected with the stirring paddle; the stirring shaft is provided with a stirring shaft hole, and the stirring shaft hole is communicated with the stirring shaft hole; the sealing ring comprises an upper sealing ring and a lower sealing ring, the upper sealing ring is connected with the planet carrier, and the lower sealing ring is connected with the stirring paddle; the upper sealing ring is contacted with the lower sealing ring; at least one annular cavity is formed at the contact part of the upper sealing ring and the lower sealing ring; the annular cavity is used for filling lubricating grease.

In the prior art, only a sealing ring is adopted, the sealing ring and the stirring shaft slide relatively, and dust slurry in the stirring box still has a larger chance to enter a bearing or a gear in the sliding process, so that equipment is damaged. The technology is based on the type of the sealing ring, the sealing ring is arranged, and the cavity for filling lubricating grease is arranged in the middle of the sealing ring. Although the upper sealing ring and the lower sealing ring can move relatively, lubricating grease is filled in the cavity, so that not only is the lubricating effect achieved, but also dust and slurry can be prevented from entering a bearing or a gear, and the reliability of the equipment is greatly improved. The grease used in the present invention refers to a grease having a relatively high density, for example, a butter, and is not limited to a specific kind. The sealing device for the stirring shaft of the stone vertical shaft stirring machine is not limited to the sealing of the stirring shaft of the stone vertical shaft stirring machine, and the sealing structure can be adopted for the sealing of the stirring shaft of the vertical shaft stirring machine. Therefore, the technical effect is within the protection scope of the patent.

The planet carrier is characterized by further comprising a feeding device, wherein the feeding device comprises an upper feeding pipe and a lower feeding pipe, the lower feeding pipe is positioned in the middle of the sun wheel, and the lower feeding pipe is connected with the planet carrier; the upper feeding pipe is connected with the equipment box and communicated with the lower feeding pipe; the lower feeding pipe extends into the stirring box; the portion of the lower feed pipe located within the agitator tank has a plurality of branches.

Among the prior art, because install the motor on the axis, the inlet pipe can only be installed at agitator tank periphery, and the feed position is close to the edge, and the difficult misce bene of material, stirring time are longer. In the technology, the slewing bearing is used as a supporting device, and the space of the middle part of the slewing bearing is large. After the driving device is installed, the residual center position is enough for installing the feeding pipe. The lower feed pipe is connected with the planet carrier, so when the planet carrier rotates, the lower feed pipe can rotate around the axis of the stirrer along with the planet carrier. The part of the lower feeding pipe extending into the stirring box is provided with a plurality of branches, and discharge ports are arranged on the branches. Therefore, when the equipment operates and feeds materials, the liquid materials are in a rotary throwing state due to the action of centrifugal force. And the lower feeding pipe is positioned in the middle of the stirring box, so that the middle area of the stirring box can also obtain materials. Compared with the prior art, the material is thrown more evenly, and the middle area of the stirring box which can not be reached in the prior art is taken care of. The materials are easier to be mixed evenly, and the stirring time is shortened.

Furthermore, the stirring paddle, the inner wall of the stirring box and the bottom plate are provided with anticorrosive wear-resistant lining plates; an anti-corrosion plate sealing plate is arranged on the stirring box; and (5) performing surface anticorrosion treatment on the exposed parts of the stirring paddle.

Adopt special paint rust-resistant, anticorrosion with current, the preparation technology is complicated and poisonous, and paint probably peels off after long-time the use, loses rust-resistant effect and compares, the utility model discloses well stirring arm's the spare part that exposes plates surface corrosion protection treatment. The stirring rod is additionally provided with an anticorrosive wear-resistant lining, and the inner wall of the cylinder body and the bottom plate are stuck with anticorrosive wear-resistant lining plates. The stirring box body is integrally coated by a stainless steel sealing plate, and the cover plate is made of an anti-corrosion plate. The manufacturing process is simple, nontoxic and incapable of losing efficacy, different produced stones are not polluted, the cleaning difficulty in the stirrer is reduced, the maintenance workload is reduced, and the maintenance cost is reduced. The exposed parts of the utility model comprise connecting fasteners and the like. The anti-corrosion plate can be any one of a stainless steel plate, a ceramic plate and an unsaturated resin anti-corrosion plate.

The device comprises a stirring box, a stirring device and a discharging device, wherein the stirring box is provided with a stirring hole;

the discharge door is fan-shaped, and the shape of the discharge opening is matched with that of the discharge door; a rotating shaft is arranged at the circular position of the fan-shaped discharging door and is arranged on the box body; the push rod is connected with the fan-shaped discharge door; the discharging door rotates around the rotating shaft under the driving of the push rod and is matched with the discharging opening to achieve the opening and closing effect;

when the push rod is in a contraction state, the discharge door is in a closing state.

The utility model discloses a push rod of unloading the door adopts hydraulic rod, and when the door of unloading was closed, hydraulic rod was in the contraction state. The piston rod of the hydraulic push rod is retracted into the cavity, so that the piston rod is prevented from being exposed outside for a long time in the operation process and the shutdown process of equipment, dust and impurities are easily contaminated, the piston rod is brought into the cavity of the oil cylinder, hydraulic oil is polluted, and the damage to the oil cylinder and the hydraulic valve is also caused. Meanwhile, the exposure time of the piston rod is short, the replacement time of hydraulic oil can be prolonged, and the service life of the hydraulic push rod is prolonged. The switch of unloading the door not only can adopt hydraulic push rod, also can adopt pneumatic push rod, electric putter etc. consequently as long as reach this technological effect, all in this patent protection scope.

To sum up, the utility model discloses at least one following beneficial effect has:

1. the oil seal and a plurality of lubricating grease are adopted for sealing, so that the reliability of the equipment is improved, and the service life is prolonged.

2. The slewing bearing is used as a power input point of the rotating device, so that the power of a plurality of driving devices can be received, and the power of the equipment box is improved; the structure complexity of a speed reducer in the driving device is reduced. The slewing bearing device is used as a rotating device and a stirring paddle for supporting, so that the stability of the equipment can be improved.

3. By adopting the modes of the anti-corrosion plate sealing plate, the surface anti-corrosion treatment and the anti-corrosion wear-resistant lining plate, the cleaning difficulty in the stirring box can be reduced, the maintenance workload is reduced, and the maintenance cost is reduced

4. Set up the push rod to shrink state when closing the door, can improve the life of push rod.

Drawings

FIG. 1 is a schematic view of a prior art seal configuration

FIG. 2 is a schematic view of a sealing structure of the embodiment

FIG. 3 is a sectional view of the embodiment

FIG. 4 is a perspective view of the rotating device of the embodiment

FIG. 5 is a plan view of the mixer according to the embodiment showing the open/close state of the discharging device

In the figure: 1. a motor; 2. a speed reducer; 21. an output gear; 3. an upper feeding pipe; 31. a support pillar; 4. a feeding pipe is arranged; 5. a planet carrier; 501. a first annular cavity; 502. a second annular cavity; 503. a third annular cavity; 504. a fourth annular cavity; 505. a fifth annular cavity; 506. a sixth annular cavity; 51. a second bearing; 52. a bearing transparent cover; 53. a lip-shaped seal ring; 54. an O-shaped sealing ring; 55. an upper seal ring; 56. a lower seal ring; 6. a planet wheel; 61. a stirring shaft; 62. A sun gear; 7. a stirring paddle; 8. an equipment box; 9. a slewing bearing; 10. an anti-corrosion plate sealing plate; 11. a corrosion-resistant plate cover plate; 12. a stirring box; 13. a hydraulic pump station; 14. a hydraulic cylinder; 15. A discharge door.

Detailed Description

In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected" to another element, it can be directly or indirectly connected to the other element without being limited to a fixed connection or a movable connection, and the specific connection mode should be determined according to specific technical problems to be solved.

It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed in a particular orientation, and be constructed in operation, and are not to be construed as limiting the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

The embodiment is as follows:

the embodiment provides a stirring shaft sealing device and a stirrer using the sealing device, and the stirring shaft sealing device comprises a stirring box 12 and an equipment box 8, wherein the equipment box 8 is arranged above the stirring box 12, and a discharging device is arranged below the stirring box 12; the stirring box 12 is used for containing materials when the materials are stirred; the equipment box 8 is used for installing a driving device and a rotating device.

The equipment box 8 comprises a support frame which is covered with a skin as a shell. A driving device mounting hole and a feeding pipe mounting hole are reserved above the equipment box 8, and the axis of the feeding pipe mounting hole is superposed with the axis of the stirring box 12. The term "coincidence" as used herein means a theoretical coincidence, and is influenced by the mounting accuracy, and it is understood that the feed pipe mounting hole is provided at an intermediate position of the equipment box 8.

The driving device comprises a motor 1 and a speed reducer 2, wherein the speed reducer 2 comprises an output gear 21;

the rotating device comprises a slewing bearing 9, the slewing bearing is arranged in the equipment box 8, and the outer ring of the slewing bearing is fixed with the equipment box 8 through bolts. The internal teeth of the inner ring mesh with the output gear 21.

After the driving device is installed, the output gear 21 partially extends into the equipment box 8 to be meshed with the pivoting support 9. In this embodiment, there are two sets of driving devices, and the driving devices are arranged at two ends of the pivoting support 9 in an axisymmetric manner. In other embodiments, more than two sets of driving devices may be provided, and the engagement points of the driving devices and the slewing bearing 9 are uniformly distributed on the slewing bearing 9. In other possible embodiments, the slewing bearing can also be fixed by an inner ring, and an outer ring gear is meshed with the output gear of the speed reducer.

The rotating device also comprises a planet carrier 5, a planet wheel 6 and a sun wheel 62, wherein the planet wheel 6 is arranged on the planet carrier 5; the lower end of the inner ring of the slewing bearing 9 is fixed with the planet carrier 5 through a bolt. The middle of the equipment box 8 is provided with a cylindrical support column 31, the interior of the support column 31 is hollow, and the support column 31 is fixedly connected with a support frame of the equipment box 8. The sun gear 62 is an external gear, and the sun gear 62 is fixed to the lower end of the support column 31; the axis of the sun gear 62 coincides with the axis of the slewing bearing 9; the sun wheel 62 meshes with the planet wheels 6. The embodiment is provided with two planet wheels 6, symmetrically meshed with the sun wheel 62. In other possible embodiments, more than two planet wheels 6 are provided, the meshing of the planet wheels 6 with the sun wheel 62 being evenly distributed.

The middle of the planet wheel 6 is fixed with a stirring shaft 61, and the stirring shaft 61 rotates along with the rotation of the planet wheel 6. The planet carrier 5 is provided with a second bearing 51, the stirring shaft 61 penetrates through the second bearing 51 and extends into the stirring box 12, and the stirring paddle 7 is connected below the stirring shaft 61.

The working principle of the mechanism is as follows: after the motor 1 is started, the speed is reduced by the speed reducer 2, the output gear 21 drives the inner ring of the slewing bearing 9 to rotate along the axis, the slewing bearing 9 drives the planet carrier 5 to rotate along the sun gear 62, and then the planet gear 6 is driven to revolve along the sun gear 62. Since the sun gear 62 is fixed, the planetary gear 6 meshes with the sun gear 62, and therefore, the planetary gear 6 rotates on its own axis while the planetary gear 6 revolves along the sun gear 62. The stirring shaft 61 on the planet wheel 6 is connected with the stirring paddle 7, so that the stirring paddle 7 rotates along the axis of the stirring box 12 while revolving along the axis. Thus, an excellent stirring effect can be obtained.

The upper part of the stirring box 12 is provided with an anticorrosive plate cover plate 11 which wraps the exposed part of the equipment box 8 to play the role of corrosion prevention.

The planet carrier 5 is also fixed with an anti-corrosion plate sealing plate 10, and the anti-corrosion plate sealing plate 10 wraps the outside of the planet carrier 5; the anticorrosive plate closing plate 10 is provided with an outlet of the stirring shaft 61 at the stirring shaft 61. The sealing plate 10 of the corrosion-resistant plate is used for preventing slurry in the stirring box 12 from entering the rotating device and the driving device, corroding equipment and reducing the service life of the equipment.

In order to solve the problem that the rotation of the stirring shaft 61 brings the dust and the slurry into the planet carrier 5, the embodiment provides a sealing device. Comprises a bearing transparent cover 52 and a sealing ring; the bearing transparent cover 52 is connected with the planet carrier 5 through a flange; the bearing transparent cover 52, the bearing II 51 and the stirring shaft 61 are provided with a first annular cavity 501; a lip-shaped sealing ring 53 is arranged between the bearing transparent cover 52 and the stirring shaft 61. The sealing rings comprise an upper sealing ring 55 and a lower sealing ring 56, and the upper sealing ring 55 is fixedly connected with the bearing transparent cover 52; the lower sealing ring 56 is connected to the stirring paddle 7, here by a press connection. A second annular cavity 502 is arranged among the upper sealing ring 55, the bearing head cover and the stirring shaft 61; the lower sealing ring 56 and the stirring shaft 61 are respectively provided with an O-shaped sealing ring 54 and a third annular cavity 503; the contact cross section of the upper sealing ring 55 and the lower sealing ring 56 is in a dog-tooth staggered shape, and a plurality of annular cavities are arranged at the contact part to form a labyrinth structure. Annular cavity four 504, annular cavity five 505 and annular cavity six 506 are provided in this embodiment as shown.

The cavity is filled with lubricating grease with higher density, and the lubricating grease plays a role in lubrication and oil sealing.

The sealing principle is as follows:

firstly, the anti-corrosion plate sealing plate 10 solves the problems of rust prevention and poor cleaning of dust and slurry entering gaps of parts at the lower part of the planet carrier 5; secondly, the problem that dust and slurry at the stirring shaft 61 flee into the inner part of the star frame 5 is solved through a sealing device. An annular cavity is respectively arranged between the bearing transparent cover 52, the upper sealing ring 55 and the bearing, and the main reason is that a gap between the bearing transparent cover 52 and the flange and a gap between the bearing transparent cover 52 and the upper sealing ring 55 cannot rotate relatively, so that a good sealing effect can be achieved by the annular cavity. Since the upper seal ring 55 and the lower seal ring 56 need to rotate relatively, a plurality of seal rings are provided to achieve a good sealing effect. The contact surfaces of the upper sealing ring 55 and the lower sealing ring 56 are designed to be in a dog-tooth staggered shape, so that the time of dust and slurry entering the bearing and the gear can be prolonged, and the entering difficulty is increased.

The embodiment also comprises a feeding device, wherein the feeding device comprises an upper feeding pipe 3 and a lower feeding pipe 4; the lower feeding pipe 4 is fixed with the planet carrier 5 and the anti-corrosion plate cover plate 11, and the lower feeding pipe 4 is fixed at the central position of the sun gear 62; the lower end of the lower feeding pipe 4 extends into the stirring box 12, and the upper end of the lower feeding pipe extends into the equipment box 8. The joints of the blanking pipe, the planet carrier 5 and the anti-corrosion plate sealing plate 10 are sealed by multilayer sealing rings. The upper feeding pipe 3 is inserted into the feeding pipe mounting hole, the mounting hole is formed in the equipment box 8, and the lower end of the upper feeding pipe 3 is inserted into the lower feeding pipe 4. The part of the lower feeding pipe 4 located inside the stirring box 12 has two branches, the discharge ports of which are directed downwards. When setting up the branch, need notice the position of stirring rake 7, when avoiding the unloading, fall on stirring rake 7. The outer part of the stirring paddle 7, the wall of the stirring box 12 and the bottom of the stirring box 12 are wrapped with anti-corrosion wear-resistant bushings; the corrosion-resistant and wear-resistant lining material is the prior art and is not in the protection range of the patent. Exposed parts on the stirring paddle 7, such as the stirring shaft 61 and exposed parts of the stirring paddle 7, are treated in a chromium plating mode, and fasteners such as nuts and bolts are made of anti-corrosion materials.

The working principle is as follows:

since the lower feeding pipe 4 is connected with the planet carrier 5, the lower feeding pipe can rotate along with the planet carrier 5. The upper feeding pipe 3 is arranged in the middle of the equipment box 8 and fixed in position, and the upper feeding pipe 3 is inserted into the lower feeding pipe 4 and cannot block the rotation of the lower feeding pipe 4. During blanking, the material enters the lower feeding pipe 4 and is driven by centrifugal force to be scattered. Because the lower feeding pipe 4 is positioned in the middle of the device, materials can directly reach the middle of the device, the discharging is more uniform, the stirring time is shortened, and the efficiency is higher.

The embodiment also comprises a discharging device, wherein the discharging device comprises a discharging opening at the bottom of the stirring box 12, a discharging door 15 arranged on the stirring box 12 and a push rod; the push rod is a hydraulic push rod; a hydraulic pump station 13 of the hydraulic push rod is fixed on the outer side of the stirring box 12; the bottom of a hydraulic cylinder 14 of the hydraulic push rod is hinged with a hydraulic pump station 13.

The discharge door 15 is fan-shaped, and the shape of the discharge opening is matched with that of the discharge door 15; a rotating shaft is arranged at the circular position of the fan-shaped discharge door 15 and is arranged on the box body; a push rod of the hydraulic push rod is hinged with one side of the sector discharging door 15; the discharging door 15 rotates around the rotating shaft under the driving of the push rod and is matched with the discharging opening to achieve the opening and closing effect. The hydraulic push rod is hinged with the sector discharge door 15, and is close to the hydraulic pump station 13 when the discharge door 15 is closed; through so setting up when can guaranteeing the hydraulic push rod shrink state, discharge door 15 is in the closed condition. In other possible embodiments, the push rod may also take the form of an electric push rod, a pneumatic push rod, or the like; as long as push rod and fan-shaped discharge door 15 articulated one side, for discharge door 15 when closing, be close to one side of push rod, the push rod is in the shrink state promptly, all is in the protection scope of this patent, and the push rod is in the shrink state promptly.

Through the above arrangement scheme, when the discharge door 15 is closed, the hydraulic push rod is in a contraction state. The push rod of the hydraulic push rod is retracted into the cavity, so that the situation that the push rod is exposed outside for a long time in the running process and the shutdown process of equipment, dust and impurities are easily contaminated, the push rod is brought into the cavity of the hydraulic cylinder, hydraulic oil is polluted, and damage to the oil cylinder and the hydraulic valve is caused is avoided. Meanwhile, the exposure time of the piston rod is short, the replacement time of hydraulic oil can be prolonged, and the service life of the hydraulic push rod is prolonged.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.

Claims (6)

1. A kind of sealing means of mixing shaft, its characteristic is: the sealing device comprises a sealing ring which is sleeved on the stirring shaft (61); the sealing rings comprise an upper sealing ring (55) and a lower sealing ring (56), and the upper sealing ring (55) is in contact with the lower sealing ring (56);

at least one annular cavity is formed at the contact part of the upper sealing ring (55) and the lower sealing ring (56); the annular cavity is used for filling lubricating grease.

2. The mixer shaft seal according to claim 1 in which: the annular cavities are arranged in a staggered mode and are not located on the same horizontal plane.

3. The utility model provides a stirrer, includes agitator tank (12) and equipment box (8), and equipment box (8) are located agitator tank (12) top, and equipment box (8) are used for installing drive arrangement and rotating device, and rotating device is connected characterized by with stirring rake (7): having at least two drive devices;

the driving device comprises a motor (1) and a speed reducer (2), the motor (1) and the speed reducer (2) are arranged above the equipment box (8), and an output shaft of the motor (1) is connected with the speed reducer (2); an output shaft of the speed reducer (2) is connected with an output gear (21);

the rotating device comprises a slewing bearing (9), a planet carrier (5), a planet wheel (6) and a sun wheel (62); the outer ring of the slewing bearing (9) is connected with the equipment box (8), and the inner teeth of the inner ring are connected with an output gear (21) of the speed reducer (2); the inner ring is connected with a planet carrier (5), and at least two planet wheels (6) are arranged on the planet carrier (5); the planet wheel (6) is connected with the sun wheel (62); the sun wheel (62) is connected with the equipment box (8); the planet wheel (6) is connected with a stirring shaft (61), and the stirring shaft (61) is connected with a stirring paddle (7);

the two sets of driving devices are arranged at two ends of the slewing bearing (9) in an axisymmetric manner;

the stirring device also comprises a sealing device, wherein the sealing device comprises a sealing ring which is sleeved on the stirring shaft (61); the sealing ring comprises an upper sealing ring (55) and a lower sealing ring (56), the upper sealing ring (55) is connected with the planet carrier (5), and the lower sealing ring (56) is connected with the stirring paddle (7); the upper sealing ring (55) is contacted with the lower sealing ring (56);

at least one annular cavity is formed at the contact part of the upper sealing ring (55) and the lower sealing ring (56); the annular cavity is used for filling lubricating grease.

4. A mixer according to claim 3, wherein: the feeding device comprises an upper feeding pipe (3) and a lower feeding pipe (4), wherein the lower feeding pipe (4) is positioned in the middle of a sun wheel (62), and the lower feeding pipe (4) is connected with a planet carrier (5); the upper feeding pipe (3) is connected with the equipment box (8), and the upper feeding pipe (3) is communicated with the lower feeding pipe (4); the lower feeding pipe (4) extends into the stirring box (12); the part of the lower feeding pipe (4) in the stirring tank (12) is provided with a plurality of branches.

5. A mixer according to claim 3, wherein: the inner walls of the stirring paddle (7) and the stirring box (12) and the bottom plate are provided with anticorrosive wear-resistant lining plates; an anti-corrosion plate cover plate (11) is arranged on the equipment box (8); and the surface of the exposed part of the stirring paddle (7) is subjected to antiseptic treatment.

6. A mixer according to claim 3, wherein: the device comprises a discharging device, wherein the discharging device comprises a discharging opening at the bottom of a stirring box (12), a discharging door (15) arranged on the stirring box (12) and a push rod;

the discharge door (15) is fan-shaped, and the shape of the discharge opening is matched with that of the discharge door (15); a rotating shaft is arranged at the round part of the sector discharge door (15), and the rotating shaft is arranged on the box body; the push rod is connected with the sector discharge door (15); the discharge door (15) rotates around the rotating shaft under the driving of the push rod and is matched with the discharge opening to achieve the opening and closing effect;

the hydraulic push rod is hinged with the sector discharge door (15) and is close to the hydraulic pump station (13) when the discharge door (15) is closed; when the push rod is in a contraction state, the discharge door (15) is in a closing state.

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