Sealing structure suitable for discharge hole of high-speed mixer

Abstract

The utility model relates to the technical field of sealing structures of discharge ports, and discloses a sealing structure suitable for a discharge port of a high-speed mixer, which comprises a mixing barrel with a discharge port at the bottom, and is characterized in that the discharge port is provided with a sealing structure for closing and opening the discharge port; the sealing structure comprises an extending cylinder which is arranged on the outer side of the discharging port and is communicated with the discharging port in a right-facing mode, and a buffering vibration reduction unit is arranged in the extending cylinder. Under the action of the buffering vibration reduction unit, vibration generated in the operation process of the mixing machine cannot be directly transmitted to the sealing cylinder, but passes through the annular air bag, on one hand, the annular air bag buffers the vibration through self deformation and then transmits the vibration to the sealing cylinder, and on the other hand, the annular air bag serves as a flexible transition piece; and rigid contact between the sealing cylinder and the extension cylinder can also be prevented.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the discharge port sealing structure technical field, concretely relates to a sealing structure suitable for the discharge port of high speed mixer. BACKGROUND

[0002] The mixer is a kind of equipment that two or more materials are mixed evenly by mechanical action, is widely used in chemical industry, pharmacy, food, metallurgy and environmental protection etc., and different forms of materials can be mixed evenly by the mixer, to ensure the homogeneity of subsequent product.

[0003] The discharge port is opened in the bottom of the mixer in prior art, and the cylinder is arranged opposite the discharge port, and the free end of the piston rod of the cylinder is fixedly connected with the sealing element, such as sealing plate, for plugging the discharge port.The sealing plate is pushed into the discharge port by the extension of the piston rod, to realize the sealing of the discharge port, and prevent the leakage of materials.There are often the following problems in prior art:1, the mixer works and generates vibration, and the vibration can cause the connection between the sealing element and the discharge port to be loose, and even cause the sealing element to produce tiny cracks, especially in high-speed operation or large-capacity mixer, the influence of vibration on sealing is more obvious;2, if the surrounding of the discharge port is not cleaned in time, residual materials will accumulate in the sealing part, and affect the performance of the sealing element, for example, the impurity particles in the materials can be bonded to the surface of the sealing port, to make the surface rough, cause the sealing plate and the discharge port to appear larger friction between them in the closing process, cause the sealing surface of the two to appear deformation, to make the sealing performance decline. SUMMARY

[0004] Therefore, the utility model discloses a sealing structure suitable for the discharge port of high speed mixer, to solve the technical problem that the sealing element and the discharge port are loose in prior art due to the vibration of the mixer.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0006] The utility model relates to a sealing structure suitable for the discharge port of high -speed mixer, including mixing cylinder, the bottom of mixing cylinder is opened with discharge port, is equipped with the sealing structure for realizing closing and opening to discharge port at discharge port, and the sealing structure includes the extension cylinder who sets up in the outside of discharge port and communicates with discharge port opposite, is equipped with the buffer damping unit in the extension cylinder, and the buffer damping unit includes the sealing cylinder coaxial with the extension cylinder, and the interval is left between sealing cylinder and the extension cylinder, a plurality of annular air bags are arranged between the extension cylinder and sealing cylinder along the axial direction, and the flexible support seat is equipped between adjacent annular air bags and leaves the interval between flexible support seat and both sides annular air bag, is equipped with the axial limit component between the extension cylinder and sealing cylinder, and the axial limit component includes the limit link that is'the character type' and is fixed on the limit groove of the extension cylinder outer end face, the fixed end of limit link is fixed with the outer end face of sealing cylinder, and the limit link free end and the groove bottom of limit groove form point contact, and the sealing structure still includes the air cylinder in one side of mixing cylinder, and the end of air cylinder piston rod free end is equipped with the sealing plate,

[0007] Further, the inner diameter of the sealing cylinder is consistent with the diameter of the sealing plate;

[0008] Further, the outer end face of the sealing cylinder is flush with the outer end face of the extension cylinder, and the inner end face of the sealing cylinder is coincident with the inner wall of the mixing cylinder;

[0009] Further, the interval between the sealing cylinder and the extension cylinder and the interval between the sealing cylinder and the discharge port jointly form an annular buffer space, and the flexible sealing ring for closing the opening is arranged at the opening of the annular buffer space;

[0010] Further, the flexible support seat is in the form of a fan ring, and the flexible support seat acts on the bottom of the sealing cylinder and provides vertical support for the sealing cylinder;

[0011] Further, the scraping unit is arranged at the sealing surface of the sealing plate, and the scraping unit includes a scraper rotatably connected to the sealing plate, the scraper includes a mounting plate and an annular blade at the edge of the mounting plate, and the blade is in the form of undulation along the circumferential direction.

[0012] The utility model has the advantages that:

[0013] Compared with the prior art, the piston rod of the air cylinder pushes the sealing plate into the sealing cylinder, so that the sealing plate blocks the discharge channel. Under the action of the buffer damping unit, the vibration generated during the operation of the mixer is not directly transmitted to the sealing cylinder, but is first transmitted to the sealing cylinder through the annular air bag. On the one hand, the annular air bag buffers the vibration and then transmits it to the sealing cylinder. On the other hand, the annular air bag as a flexible transition piece can also prevent rigid contact between the sealing cylinder and the extension cylinder. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to make the purpose, technical scheme and beneficial effect of the utility model more clear, the utility model provides the following drawings for description:

[0015] Figure 1 It is the whole schematic view of the sealing structure suitable for the discharge port of the high-speed mixing machine in the embodiment one of the utility model;

[0016] Figure 2 It is the top view (hidden cover plate) of the sealing structure suitable for the discharge port of the high-speed mixing machine in the embodiment one of the utility model;

[0017] Figure 3 It is the sectional view of the extension cylinder place in the embodiment one of the utility model, for showing the buffer damping unit and the scraping unit in its inside;

[0018] Figure 4 It is the enlarged view of A1 in the embodiment one of the utility model; Figure 1

[0019] Figure 5 It is the enlarged view of A2 in the embodiment one of the utility model; Figure 4

[0020] Figure 6 It is the enlarged view of A3 in the embodiment one of the utility model. Figure 3 The signs in the drawing are as follows:

[0021] Mixing cylinder 1, support 101, discharge port 102, cover plate 2, feed inlet 201, stirring mechanism 3, rotating rod 301, stirring blade 302, motor 303, sealing structure 4, extension cylinder 401, air cylinder 402, piston rod 403, sealing plate 404, buffer damping unit 5, sealing cylinder 501, annular air bag 502, flexible support base 503, sealing ring 504, limiting rod 505, limiting groove 506 scraping unit 6, scraper 601, blade edge 602, mounting plate 603, bearing 604, rotating shaft 605.

[0022] Specific implementation The embodiment one is specifically as shown in the drawing.

[0023] Figures 1-6 A sealing structure suitable for the discharge port of the high-speed mixing machine, including mixing cylinder 1, the bottom of mixing cylinder 1 is provided with discharge port 102, the mixed material is discharged through discharge port 102, sealing structure 4 for realizing the closing and opening of discharge port 102 is arranged at discharge port 102.

[0024] Mixing cylinder 1 is cylindrical as a whole, and a stirring space is formed in the inside of mixing cylinder 1, support 101 is welded and fixed below mixing cylinder 1, and an installation space is formed in the inside of support 101.Cover plate 2 is rotatably connected at the opening of the top of mixing cylinder 1, cover plate 2 rotates in the horizontal direction, so that mixing cylinder 1 is opened and closed, and feed inlet 201 for feeding material is formed in cover plate 2.

[0025] Mixing cylinder 1 is cylindrical as a whole, and a stirring space is formed in the inside of mixing cylinder 1, support 101 is welded and fixed below mixing cylinder 1, and an installation space is formed in the inside of support 101.Cover plate 2 is rotatably connected at the opening of the top of mixing cylinder 1, cover plate 2 rotates in the horizontal direction, so that mixing cylinder 1 is opened and closed, and feed inlet 201 for feeding material is formed in cover plate 2. ​​​

[0026] The mixing barrel 1 is provided with a stirring structure 3 for stirring materials, as shown in the figure. Figure 2 The stirring structure 3 is located at the bottom of the mixing barrel 1, and the stirring structure 3 comprises a rotating rod 301 coaxial with the mixing barrel 1 and stirring blades 302 distributed around the rotating rod 301, the inner end of the stirring blades 302 being welded and fixed with the rotating rod 301. The stirring structure 3 further comprises a motor 303 arranged on the bottom plate of the mixing barrel 1, the motor 303 being located in the mounting space inside the support 101, and the motor 303 being fixedly connected with the mixing barrel 1 by screws. The bottom end of the rotating rod 301 extends downward in the vertical direction and passes through the bottom plate of the mixing barrel 1 and is fixedly connected with the output shaft of the motor 303, and a shaft coupling is used between the rotating rod 301 and the output shaft of the motor 303.

[0027] As shown in the figure, Figure 3 , Figure 4 The sealing structure 4 comprises an extension barrel 401 arranged outside the discharge port 102 and in communication with the discharge port 102, the inner diameter of the extension barrel 401 is consistent with the inner diameter of the discharge port 102 and the axial directions of the two are coincident, and the fixed end of the extension barrel 401 is welded and fixed with the outer wall of the mixing barrel 1. The sealing structure 4 further comprises a pneumatic cylinder 402 located on one side of the mixing barrel 1, and the end of the free end of the piston rod 403 of the pneumatic cylinder 402 is welded with a sealing plate 404.

[0028] The extension barrel 401 is provided with a buffer damping unit 5, as shown in the figure. Figure 3 The buffer damping unit 5 comprises a sealing barrel 501 coaxial with the extension barrel 401, the sealing barrel 501 is located inside the extension barrel 401, and there is a space between the sealing barrel 501 and the extension barrel 401. It needs to be pointed out that in this embodiment, the outer end face of the sealing barrel 501 is flush with the outer end face of the extension barrel 401, and the inner end face of the sealing barrel 501 is coincident with the inner wall of the mixing barrel 1, so that the space between the sealing barrel 501 and the extension barrel 401 and the space between the sealing barrel 501 and the discharge port 102 jointly form an annular buffer space. In addition, it needs to be further pointed out that the inner diameter of the sealing barrel 501 is consistent with the diameter of the sealing plate 404, and the inner space of the sealing barrel 501 is the discharge channel.

[0029] A plurality of annular air bags 502 are uniformly arranged between the extension barrel 401 and the sealing barrel 501 in the axial direction, in this embodiment, there are three annular air bags 502, and the annular air bags 502 are all located inside the annular buffer space, and the annular air bags 502 are tightly pressed and supported on the sealing barrel 501. Specifically, the annular air bags 502 are provided with matching inflation holes, and by inflating the annular air bags 502, the outer side surface of the annular air bags 502 is in complete contact with the inner wall of the extension barrel 401, and the inner side surface of the annular air bags 502 is in complete contact with the outer wall of the sealing barrel 501.

[0030] The flexible support seat 503 is in the form of a fan ring and has a width consistent with that of the annular buffer space. The flexible support seat 503 acts on the bottom of the sealing cylinder 501 and provides vertical support for the sealing cylinder 501. Specifically, the bottom surface of the flexible support seat 503 is glued and fixed to the inner wall of the extension cylinder 401, and the top surface of the flexible support seat 503 is in contact with the sealing cylinder 501. In this embodiment, the flexible support seat 503 is made of rubber material. By arranging the flexible support seat 503, the annular air bag 502 can share part of the weight of the sealing cylinder 501, thereby preventing the annular air bag 502 from being affected in its buffering performance due to excessive load on the bottom.

[0031] The two ends of the annular buffer space are provided with flexible sealing rings 504 for closing the openings. The sealing rings 504 are also made of rubber material and have strong elasticity and deformation ability.

[0032] In order to prevent the extension cylinder 401 from being displaced axially relative to the sealing cylinder 501 under the action of external force (such as), an axial limiting assembly is arranged between the extension cylinder 401 and the sealing cylinder 501, as shown in Figure 5 The axial limiting assembly includes a "H" shaped limiting rod 505 and a limiting groove 506 welded to the outer end surface of the extension cylinder 401. The fixed end of the limiting rod 505 is welded and fixed to the outer end surface of the sealing cylinder 501, and the free end of the limiting rod 505 is in the form of a spherical surface. The free end of the limiting rod 505 and the groove bottom of the limiting groove 506 form a point contact. The axial limiting assembly only limits the axial displacement of the extension cylinder 401 and does not affect the movement of the extension cylinder 401 in the vertical plane.

[0033] When the mixer needs to be stirred, the piston rod 403 of the air cylinder 402 pushes the sealing plate 404 into the sealing cylinder 501, so that the sealing plate 404 blocks the discharge passage. Under the action of the buffer damping unit 5, the vibration generated during the operation of the mixer will not be directly transmitted to the sealing cylinder 501, but will first pass through the annular air bag 502. On the one hand, the annular air bag 502 buffers the vibration by deforming itself and then transmits it to the sealing cylinder 501. On the other hand, the annular air bag 502 acts as a flexible transition piece and can also prevent rigid contact between the sealing cylinder 501 and the extension cylinder 401.

[0034] In order to prevent the residual and adhered waste materials on the inner wall of the sealing cylinder 501 from affecting the sealing performance, a scraping unit 6 is arranged at the sealing surface of the sealing plate 404. It needs to be further explained that the sealing surface of the sealing plate 404 is the end surface of the sealing plate 404 away from the piston rod 403. As Figure 6As shown, the scraping unit 6 comprises a scraper 601 rotationally connected with the sealing plate 404. Specifically, the scraper 601 comprises a mounting plate 603 and an annular blade 602 located at the edge of the mounting plate 603. The blade 602 has a wavy shape in the circumferential direction. The blade 602 is integrally formed with the mounting plate 603. In this embodiment, the outer diameters of the sealing plate 404, the mounting plate 603 and the blade 602 are consistent. A mounting groove is formed at the center of the sealing surface of the sealing plate 404. A bearing 604 is clamped in the mounting groove. The sealing plate 404 and the bearing 604 are further fixed by welding. A rotating shaft 605 is arranged in the inner ring of the bearing 604 and fixed by key connection. The end of the rotating shaft 605 away from the bearing 604 is a free end. The free end of the rotating shaft 605 passes through the mounting plate 603 and is fixed by welding.

[0035] Through the arrangement of the scraping unit 6, when the sealing plate 404 is pushed to block the sealing cylinder 501, the blade 602 at the front end of the sealing plate 404 can scrape the residual and adhered waste materials on the inner wall of the sealing cylinder 501. Since the blade 602 has a wavy shape in the circumferential direction, different cutting angles and different cutting forces can be applied to the waste materials. Especially for waste materials with large adhesion strength and large volume, the effect is more obvious. Moreover, the blade 602 can rotate when encountering large resistance during cutting, thereby applying a rotary cutting effect to the waste materials, which is beneficial to the removal of the waste materials.

[0036] Finally, it should be pointed out that the above preferred embodiments are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present application.

Claims

1. A sealing structure for the discharge port of a high-speed mixer, comprising a mixing bowl, the bottom of which is provided with a discharge port, characterized in that, The sealing structure is arranged at the discharge port and used for closing and opening the discharge port. The sealing structure comprises an extension cylinder arranged outside the discharge port and in communication with the discharge port. A buffer damping unit is arranged in the extension cylinder. The buffer damping unit comprises a sealing cylinder coaxial with the extension cylinder. A space is arranged between the sealing cylinder and the extension cylinder. A plurality of annular air bags are arranged between the extension cylinder and the sealing cylinder in the axial direction. Flexible support seats are arranged between adjacent annular air bags and spaces are arranged between the flexible support seats and the annular air bags on both sides. An axial limiting assembly is arranged between the extension cylinder and the sealing cylinder. The axial limiting assembly comprises a "H" shaped limiting rod and a limiting groove fixed on the outer end surface of the extension cylinder. The fixed end of the limiting rod is fixed with the outer end surface of the sealing cylinder. The free end of the limiting rod is in point contact with the groove bottom of the limiting groove. The sealing structure further comprises a cylinder arranged on one side of the mixing cylinder. The end of the free end of the piston rod of the cylinder is provided with a sealing plate.

2. The seal structure for the discharge port of a high speed mixer according to claim 1, wherein The inner diameter of the sealing cylinder is consistent with the diameter of the sealing plate.

3. The seal structure for the discharge opening of a high speed mixer according to claim 2, wherein The outer end surface of the sealing cylinder is flush with the outer end surface of the extension cylinder. The inner end surface of the sealing cylinder is coincident with the inner wall of the mixing cylinder.

4. The seal structure for the discharge port of a high speed mixer according to claim 3, wherein The space between the sealing cylinder and the extension cylinder and the space between the sealing cylinder and the discharge port jointly form an annular buffer space. Flexible sealing rings are arranged at the two open ends of the annular buffer space for closing the openings.

5. The seal structure for the discharge opening of a high speed mixer according to claim 4, wherein The flexible support seat is in the form of a fan ring. The flexible support seat acts on the bottom of the sealing cylinder and provides vertical support for the sealing cylinder.

6. The seal structure for the discharge opening of a high speed mixer according to any one of claims 1 to 5, wherein A scraping unit is arranged at the sealing surface of the sealing plate. The scraping unit comprises a scraper rotationally connected with the sealing plate. The scraper comprises a mounting plate and an annular blade at the edge of the mounting plate. The blade is in the form of ups and downs in the circumferential direction.

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