CN219692422U - Sealing structure of carbon black airtight valve - Google Patents

Abstract

The utility model relates to the technical field of carbon black airtight valves, in particular to a sealing structure of a carbon black airtight valve. In order to solve the problems that the existing carbon black airtight valve is low in carbon black production efficiency, high in labor intensity and easy to lose efficacy in sealing due to the adoption of a packing sealing structure, the novel sealing structure of the carbon black airtight valve is provided, and comprises a valve body, a rotor shaft, a bearing seat, an annular sealing seat, an oil seal gland and two oil seals, wherein the bearing seat is sleeved outside the rotor shaft in a rotating mode, the outer edge of the bearing seat is in sealing connection with the outer edge of the valve body, an oil storage cavity is formed between the inner ring of the sealing seat and the rotor shaft, the two oil seals are respectively arranged between two end portions of the inner ring of the sealing seat in a sealing mode and the rotor shaft in a sealing mode, and the oil seal gland is used for compressing and positioning the two oil seals when being fixed on the outer end portions of the sealing seat through compression bolts. The sealing structure is simple and practical, reduces the workload of overhaul operation, and greatly improves the productivity of carbon black.

Description

Sealing structure of carbon black airtight valve

Technical Field

The utility model relates to the technical field of carbon black airtight valves, in particular to a sealing structure of a carbon black airtight valve.

Background

In the production of carbon black, the mixture of carbon black and tail gas is separated by a bag filter, the tail gas is pressurized and then directly sent to the subsequent process, and the collected high-temperature carbon black is concentrated in a cone of the bag filter and is uniformly supplied to the next process through a carbon black airtight valve at the lower part of the cone. The carbon black airtight valve comprises a driving wheel 13, a rotor shaft 2, a cylindrical valve body 1 sleeved in the middle of the rotor shaft 2 and a valve cover 15, wherein both ends of the valve cover 15 and the rotor shaft 2 are in rotary connection through bearing structures, sealing structures are adopted between both ends of the valve body 1 and the rotor shaft 2 to prevent carbon black from leaking, the sealing structures of the conventional carbon black airtight valve are all packing seals, such as asbestos packing, tetrafluoro packing and the like, packing is arranged in a packing chamber, the gap between a packing chamber gland and the packing chamber is adjusted by tightening a packing chamber compression bolt, the packing is deformed, so that the packing is tightly attached to the circumferential surface of the rotor shaft, sliding friction exists between the packing and the rotor shaft when the rotor shaft is driven by the driving wheel to rotate, the sealing purpose is achieved between the valve body of the carbon black airtight valve and the rotor shaft through the joint surface between the packing and the rotor shaft, but the packing seals have the following disadvantages: the rotor shaft and the filler are worn greatly, the compression bolts are required to be replaced or regulated regularly, the production efficiency is low, and the labor intensity of workers is high; the high-temperature carbon black easily causes the filler to lose elasticity, thereby causing sealing failure, and the carbon black leaks and has low safety.

Disclosure of Invention

The utility model aims to solve the problems that the existing carbon black airtight valve adopts a filler sealing structure which is easy to cause low carbon black production efficiency, high labor intensity of workers and easy to lose efficacy of sealing, and provides a novel sealing structure of the carbon black airtight valve.

The utility model is realized by adopting the following technical scheme:

the utility model provides a seal structure of carbon black airtight valve, including the valve body, the rotor shaft, all rotate the bearing frame of overcoat in the rotor shaft, the annular seal seat, the oil blanket gland, two oil blanket, the bearing frame is located one side tip of valve body, the outward flange of bearing frame and the outward flange sealing connection of valve body (how to realize sealing connection is the conventional technical means of skilled in the art, if adopt the connection such as ring flange structure or adopt sealing welding), the outside of the inward flange of bearing frame is equipped with annular notch, the inboard tip endotheca of seal seat is fixed in the annular notch department of bearing frame, the middle part endotheca of the inner race of seal seat is inherent the axle sleeve, be equipped with the oil storage chamber between the inner race of axle sleeve and the rotor shaft, two oil blanket seal are located between the both ends and the rotor shaft of the inner race of seal seat respectively, the oil blanket is located the outside tip of seal seat and is fixed in the outside tip of seal seat through pressing bolt and compresses tightly the location with two oil blanket, the upper portion of seal seat is equipped with first oil filler neck, the upper portion of axle sleeve is equipped with the second filler neck that communicates with first filler neck, the oil storage chamber, oil filler neck all communicates with each other, the lower part of seal seat is equipped with first oil drain hole. (As is well known to those skilled in the art, since the sealing structures at both ends of the valve body are identical to those at both sides of the rotor shaft, the present utility model only describes the sealing structure between one end of the valve body and the rotor shaft, and for simplicity and convenience of description of the present utility model, the outer edge, the outer ring, the inner edge and the inner ring are all inner and outer with respect to the radial direction of the rotor shaft, and the outer side and the inner side are both inner with respect to the axial direction of the rotor shaft, and the position near the middle of the rotor shaft is defined as the inner side, and the position far from the middle of the rotor shaft is defined as the outer side).

Working principle: when the oil seal sealing structure is used for sealing the carbon black airtight valve, the sealing effect is good, the workload and time for periodically replacing and maintaining the filler seal are saved, and meanwhile, the labor intensity of workers is also reduced, so that the production efficiency of carbon black is indirectly improved.

Further, an annular baffle is fixed on the inner side of the inner edge of the bearing seat, and the inner ring of the baffle is in clearance fit with the rotor shaft. The baffle can block most of carbon black, reduce direct contact between the carbon black and an oil seal, and prolong the service life of the sealing structure.

The beneficial effects of the utility model are as follows: 1) The sealing effect is good, and the leakage of carbon black is effectively avoided; 2) The sealing structure does not need to check and adjust the compression bolt regularly in use, thereby reducing the labor intensity of workers; 3) The sealing structure effectively reduces the abrasion between the oil seal and the rotor shaft by adding the oil storage cavity; 4) The sealing structure is simple and practical, reduces the working time of overhaul operation, and greatly improves the productivity of carbon black.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the utility model and together with the description, serve to explain the principles of the utility model.

In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, and it will be obvious to a person skilled in the art that other drawings can be obtained from these drawings without inventive effort.

FIG. 1 is a schematic diagram of a carbon black airtight valve;

fig. 2 is a schematic view of the sealing structure of the carbon black airtight valve, namely, a partially enlarged view at a in fig. 1.

In the figure: the valve comprises a valve body 1, a rotor shaft 2, a bearing seat 3, a sealing seat 4, an oil seal gland 5, an oil seal 6, an annular notch 7, a shaft sleeve 8, an oil storage cavity 9, a compression bolt 10, a baffle 11, a fixing bolt 12, a driving wheel 13, an oil discharge bolt 14 and a valve cover 15.

Description of the embodiments

In order that the above objects, features and advantages of the utility model will be more clearly understood, a further description of the utility model will be made. It should be noted that, without conflict, the embodiments of the present utility model and features in the embodiments may be combined with each other.

In the description, it should be noted that the terms "first," "second," and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. It should be noted that, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms described above will be understood by those of ordinary skill in the art as the case may be.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model, but the present utility model may be practiced otherwise than as described herein; it will be apparent that the embodiments in the specification are only some, but not all, embodiments of the utility model.

Specific embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.

As shown in fig. 1 and 2, a sealing structure of a carbon black airtight valve comprises a valve body 1, a rotor shaft 2, a bearing seat 3, an annular sealing seat 4, an oil seal gland 5 and two oil seals 6, wherein the bearing seat 3 is sleeved outside the rotor shaft 2 in a rotating manner, the bearing seat 3 is positioned at one side end part of the valve body 1, the outer edge of the bearing seat 3 is in sealing connection with the outer edge of the valve body 1 (how the outer edge of the bearing seat 3 and the outer edge of the valve body 1 are in sealing connection is a conventional technical means of a person in the art, such as connection of a flange structure or sealing welding is adopted), an annular notch 7 is arranged at the outer side of the inner edge of the bearing seat 3, an inner side end part of the sealing seat 4 is sleeved and fixed at the annular notch 7 of the bearing seat 3 in an inner side end part, an oil storage cavity 9 is arranged between the inner ring of the sealing seat 4 and the rotor shaft 2, the two oil seals 6 are respectively arranged between two end parts of the inner ring of the sealing seat 4 and the rotor shaft 2, the oil seal gland 5 is positioned at the outer side end part of the sealing seat 4 and is fixed at the outer side end part of the sealing seat 4 through a pressing bolt 10, the two oil seals 6 are pressed and positioned at the same time, a first oil filling hole 8 is arranged at the upper part of the sealing seat 4, a first oil filling hole is arranged at the upper part is provided with a first oil drain hole, an upper oil drain hole is arranged at the upper part is communicated with a lower sealing hole, and a first oil drain hole is arranged at the upper oil drain hole is communicated with a lower sealing hole is arranged at the upper sealing hole 4. (As is well known to those skilled in the art, since the sealing structures on both sides between both ends of the valve body 1 and the rotor shaft 2 are the same, the present utility model only describes the sealing structure between one end of the valve body 1 and the rotor shaft 2, and for simplicity and convenience of description of the present utility model, the outer edge, the outer ring, the inner edge and the inner ring are all inner and outer with respect to the radial direction of the rotor shaft 2, and the outer side and the inner side are both outer and inner with respect to the axial direction of the rotor shaft 2, and define the position near the middle of the rotor shaft 2 as the inner side and the position far from the middle of the rotor shaft 2 as the outer side).

Working principle: when the sealing structure of the oil seal 6 is used for sealing the carbon black airtight valve, the sealing effect is good, the workload and time for periodically replacing and maintaining the filler seal are saved, and meanwhile, the labor intensity of workers is also reduced, so that the production efficiency of carbon black is indirectly improved.

In specific implementation, an annular baffle plate 11 is fixed on the inner side of the inner edge of the bearing seat 3, and the inner ring of the baffle plate 11 is in clearance fit with the rotor shaft 2. The baffle 11 can block most of carbon black, reduce direct contact of the carbon black and the oil seal 6, and prolong the service life of the sealing structure. In specific implementation, the inner side of the inner edge of the bearing seat 3 is fixedly connected with the baffle 11 through the fixing bolts 12, so that replacement and installation are facilitated.

In the concrete implementation, the two oil seals 6 are both double-lip oil seals 6, so that the sealing effect of the carbon black airtight valve is better.

In the concrete implementation, the oil seal 6 positioned on the inner side and the shaft shoulder of the rotor shaft 2 form a sealing surface, so that the sealing effect is better.

In the specific embodiment, the oil drain cover adopts the oil drain bolt 14, and the structure is simple and easy to realize.

In addition, when in use, the first oil filling hole of the sealing structure is communicated with an external oil station, and the oil seal 6 is balanced under the pressure of oil pressure and carbon black in the valve body 1 by keeping constant lubricating oil supply of the external oil station, so that the service life of the oil seal 6 is longer, and the tightness of the carbon black airtight valve is further ensured.

The foregoing is only a specific embodiment of the utility model to enable those skilled in the art to understand or practice the utility model. Although described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the embodiments, and they should be construed as covering the scope of the appended claims.

Claims (6)

1. The sealing structure of the carbon black airtight valve comprises a valve body (1) and a rotor shaft (2), and is characterized by further comprising a bearing seat (3), an annular sealing seat (4), an oil seal gland (5) and two oil seals (6), wherein the bearing seat (3) is arranged at one side end part of the valve body (1), the outer edge of the bearing seat (3) is in sealing connection with the outer edge of the valve body (1), an annular notch (7) is arranged at the outer side of the inner edge of the bearing seat (3), the inner side end part of the sealing seat (4) is sleeved and fixed at the annular notch (7) of the bearing seat (3), an oil storage cavity (9) is arranged between the inner ring of the sealing seat (4) and the rotor shaft (2), the two oil seals (6) are respectively arranged between the two end parts of the inner ring of the sealing seat (4) and the rotor shaft (2), the oil seal gland (5) is arranged at the outer side end part of the sealing seat (4) and is fixed at the outer side end part of the sealing seat (4) through a compression bolt (10), the two oil seals (6) are compressed and positioned, the upper oil filling holes (4) are respectively arranged at the upper oil filling holes (8) of the sealing seat and the upper oil storage cavity (8) and the lower oil storage cavity (4) are respectively provided with first oil storage holes, the lower part of the shaft sleeve (8) is provided with a second oil drain hole communicated with the first oil drain hole and the oil storage cavity (9), and an oil drain cover is hermetically arranged at the first oil drain hole.

2. The sealing structure of the carbon black airtight valve according to claim 1, wherein an annular baffle plate (11) is fixed on the inner side of the inner edge of the bearing seat (3), and the inner ring of the baffle plate (11) is in clearance fit with the rotor shaft (2).

3. The sealing structure of a carbon black airtight valve according to claim 2, wherein the inner side of the inner edge of the bearing housing (3) is fixedly connected with the baffle plate (11) by a fixing bolt (12).

4. A sealing structure of a carbon black airtight valve according to claim 1 or 2 or 3, wherein both oil seals (6) are double lip oil seals (6).

5. A sealing structure of a carbon black airtight valve according to claim 4, characterized in that the oil seal (6) located at the inner side forms a sealing surface with the shoulder of the rotor shaft (2).

6. The sealing structure of a carbon black airtight valve according to claim 5, wherein the oil drain cover adopts an oil drain bolt (14).