Mechanical sealing structure suitable for latex production reaction

Abstract

The utility model relates to a mechanical sealing structure suitable for latex production reaction, which comprises a reaction kettle body and a stirring shaft penetrating through the top of the reaction kettle body, a sealing ring is arranged between the stirring shaft and the top of the reaction kettle body, and the sealing ring comprises an annular sealing ring body. A first annular groove and a second annular groove which are distributed up and down are formed in the inner circumferential side face of the sealing ring body, an oil seal is arranged in the first annular groove, and a sealing piece for sealing oil is arranged in the second annular groove. The oil seal adopts a framework oil seal; and the sealing piece is an O-shaped ring. The sealing ring is simple and reasonable in structural design, the framework oil seal and the O-shaped ring which are distributed up and down are arranged on the sealing face of the sealing ring, friction stress is reduced, when leaked gas enters the sealing face, sealing oil of the framework oil seal can effectively isolate leakage, and the sealing effect is effectively improved; and the O-shaped ring is arranged on the lower side of the framework oil seal, so that the problem of oil leakage caused by the fact that oil in the framework oil seal enters the reaction kettle can be prevented.

Description

Technical field:

[0001] The utility model relates to a mechanical sealing structure suitable for latex production reaction. Background technology:

[0002] A reactor is required in the production process of latex. Currently, a sealing ring is used between the stirring shaft of the reactor and the reactor, and the inner circumferential side of the sealing ring is the sealing surface. This single plane sealing surface is prone to poor sealing due to stress friction during the rotation of the stirring shaft, which leads to leakage of high-pressure gas in the reactor. Therefore, it is necessary to improve this technical problem, and this case is born. Utility model content:

[0003] The utility model makes improvements on the problems existing in the above-mentioned prior art, that is, the technical problem to be solved by the utility model is to provide a mechanical sealing structure suitable for latex production reaction, which has reasonable design and effectively improves the sealing effect.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a mechanical sealing structure suitable for latex production reaction, including a reactor body and a stirring shaft passing through the top of the reactor body, a sealing ring is arranged between the stirring shaft and the top of the reactor body, the sealing ring includes an annular sealing ring body, the inner peripheral side surface of the sealing ring body is provided with a first annular groove and a second annular groove distributed upward and downward, an oil seal is arranged in the first annular groove, and a sealing member acting as a sealing oil is arranged in the second annular groove.

[0005] Furthermore, the oil seal adopts a skeleton oil seal.

[0006] Furthermore, the sealing element is an O-ring.

[0007] Furthermore, the diameter of the first annular groove is greater than the diameter of the second annular groove, and the first annular groove and the second annular groove are distributed in a stepped manner.

[0008] Furthermore, the outer peripheral side surface of the sealing ring body is a polished surface.

[0009] Furthermore, a support seat for supporting the stirring shaft is provided in the middle of the inner bottom surface of the reactor body. The support seat is a cylindrical structure with an open top. A shaft sleeve is provided on the outer side of the lower end of the stirring shaft. The shaft sleeve is accommodated inside the support seat. The top surface of the shaft sleeve is flush with the top surface of the support seat. A ring-shaped shaft sleeve pressure plate is provided above the shaft sleeve and is sleeved on the outer side of the stirring shaft. The shaft sleeve pressure plate and the support seat are connected by fasteners.

[0010] Furthermore, the shaft sleeve pressure plate is provided with a plurality of upper connecting screw holes which are evenly distributed in a circle around the axis of the shaft sleeve pressure plate, and the upper connecting screw holes pass through along the axis direction of the shaft sleeve pressure plate; the top surface of the support seat is provided with a plurality of lower connecting screw holes which are evenly distributed in a circle around the axis of the support seat, and the positions of the plurality of lower connecting screw holes correspond to the positions of the plurality of upper connecting screw holes, and locking bolts are connected between the upper connecting screw holes and the lower connecting screw holes which are in corresponding positions, and the locking bolts lock and fix the shaft sleeve pressure plate and the support seat.

[0011] Furthermore, the shaft sleeve pressure plate is made of metal, and the outer diameter of the shaft sleeve pressure plate is the same as the outer diameter of the support seat; the support seat is cylindrical.

[0012] Compared with the prior art, the utility model has the following effects: the utility model has a simple and reasonable structural design, and reduces the generation of friction stress by arranging upper and lower distributed skeleton oil seals and O-rings on the sealing surface of the sealing ring. When leakage gas enters the sealing surface, the sealing oil of the skeleton oil seal can effectively isolate the leakage, thereby effectively improving the sealing effect; and an O-ring is arranged on the lower side of the skeleton oil seal, which can prevent the oil of the skeleton oil seal from entering the reactor and causing oil leakage problems. Description of the drawings:

[0013] Figure 1 It is a schematic diagram of the main cross-sectional structure of the first embodiment of the utility model;

[0014] Figure 2 yes Figure 1 A is an enlarged schematic diagram;

[0015] Figure 3 This is a schematic diagram of the main cross-sectional structure of the second embodiment of the utility model;

[0016] Figure 4 yes Figure 3 The enlarged schematic diagram of point B in FIG.

[0017] Figure 5 It is a schematic diagram of the top view of the shaft sleeve pressure plate in the second embodiment of the utility model. Specific implementation method:

[0018] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0019] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0020] Embodiment 1: Figures 1-2 As shown, the utility model is a mechanical seal structure suitable for latex production reaction, which solves the problem of poor sealing and leakage of high-pressure gas in the kettle caused by stress friction when a single plane sealing surface rotates. Specifically, it includes a reactor body 1, a stirring shaft 2 penetrating from the top of the reactor body 1, and a sealing ring 9 made of metal material is arranged between the stirring shaft 2 and the top of the reactor body 1. The sealing ring 9 includes a ring-shaped sealing ring body 10, and the inner peripheral side surface of the sealing ring body 10 is provided with a first annular groove 11 and a second annular groove 12 distributed up and down. A skeleton oil seal 13 is arranged in the first annular groove 11, and an O-ring 14 for sealing oil for the skeleton oil seal is arranged in the second annular groove 12. By arranging the skeleton oil seal and O-ring distributed up and down on the sealing surface of the sealing ring, the friction stress is reduced. When the leaked gas enters the sealing surface, the sealing oil of the skeleton oil seal can effectively isolate the leakage, and effectively improve the sealing effect; and the O-ring is arranged on the lower side of the skeleton oil seal, which can prevent the oil of the skeleton oil seal from entering the reactor and causing oil leakage.

[0021] In this embodiment, the first annular groove and the second annular groove are both coaxially distributed with the sealing ring body.

[0022] In this embodiment, the diameter of the first annular groove is greater than the diameter of the second annular groove, and the first annular groove and the second annular groove are distributed in a stepped manner.

[0023] In this embodiment, the outer peripheral side surface of the sealing ring body is a polished surface.

[0024] In this embodiment, the inner diameter of the sealing ring body is 110mm, and the outer diameter of the sealing ring body is 150mm; the width of the first annular groove is 6mm, the width of the second annular groove is 5mm, the diameter of the first annular groove is 130mm, and the diameter of the second annular groove is 6mm smaller than the diameter of the first annular groove.

[0025] Embodiment 2: Figure 3 , 4As shown in Figure 5, the difference between this embodiment and the first embodiment is that a support seat 3 for supporting the stirring shaft 2 is provided in the middle of the inner bottom surface of the reactor body 1, the support seat 3 is a cylindrical structure with an open top, a sleeve is sleeved on the outer side of the lower end of the stirring shaft 2, the sleeve 4 is accommodated inside the support seat 3, the top surface of the sleeve 4 is flush with the top surface of the support seat 3, and a ring-shaped sleeve pressing plate 5 sleeved on the outer side of the stirring shaft 2 is provided above the sleeve 4, and the sleeve pressing plate 5 is connected to the support seat 3 by fasteners. By designing the top surface of the sleeve to be flush with the top surface of the support seat, fixing the sleeve pressing plate on the top of the support seat, and limiting the sleeve by the sleeve pressing plate, the relative displacement between the sleeve and the stirring shaft can be reduced, which not only improves the stirring stability, but also prolongs the service life of the sleeve.

[0026] In another embodiment, the sleeve pressing plate 5 is provided with three upper connecting screw holes 6 evenly distributed around the axis of the sleeve pressing plate 5, and the upper connecting screw holes 6 are through along the axis direction of the sleeve pressing plate; the top surface of the support seat 3 is provided with three lower connecting screw holes 7 evenly distributed around the axis of the support seat 3, and the positions of the three lower connecting screw holes 7 correspond to the positions of the three upper connecting screw holes 6. A locking bolt 8 is connected between the upper connecting screw holes 6 and the lower connecting screw holes 7 at corresponding positions, and the locking bolt locks the sleeve pressing plate and the support seat. The bolt connection method is not only firm, but also easy to assemble and disassemble.

[0027] In another embodiment, in order to improve the structural strength, the shaft sleeve pressure plate is made of metal.

[0028] In another embodiment, the outer diameter of the shaft sleeve pressing plate 5 is the same as the outer diameter of the supporting seat 3 .

[0029] In another embodiment, the support base 3 is cylindrical.

[0030] If the present invention discloses or involves components or structures that are fixedly connected to each other, then, unless otherwise stated, the fixed connection can be understood as: a detachable fixed connection (for example, connection using bolts or screws), and can also be understood as: a non-detachable fixed connection (for example, riveting, welding). Of course, the mutual fixed connection can also be replaced by an integrated structure (for example, manufactured by one-piece molding using a casting process) (except where it is obviously impossible to use an one-piece molding process).

[0031] In addition, unless otherwise stated, the terms used to indicate positional relationships or shapes in any of the technical solutions disclosed in the above utility model include states or shapes that are approximate, similar or close thereto.

[0032] Any component provided by the utility model can be assembled from multiple separate components, or can be a separate component manufactured by an integrated molding process.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the utility model can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the utility model, which should be included in the scope of the technical solution for protection of the utility model.

Claims

1. A mechanical sealing structure suitable for latex production reaction, comprising a reactor body, a stirring shaft penetrating from the top of the reactor body, and a sealing ring is arranged between the stirring shaft and the top of the reactor body, characterized in that: The sealing ring comprises an annular sealing ring body, the inner peripheral side surface of which is provided with a first annular groove and a second annular groove distributed upward and downward, an oil seal is provided in the first annular groove, and a sealing member serving as sealing oil is provided in the second annular groove.

2. A mechanical sealing structure suitable for latex production reaction according to claim 1, characterized in that: The oil seal adopts a skeleton oil seal.

3. A mechanical sealing structure suitable for latex production reaction according to claim 1, characterized in that: The sealing element is an O-ring.

4. A mechanical sealing structure suitable for latex production reaction according to claim 1, characterized in that: The diameter of the first annular groove is greater than the diameter of the second annular groove, and the first annular groove and the second annular groove are distributed in a stepped manner.

5. A mechanical sealing structure suitable for latex production reaction according to claim 1, characterized in that: The outer peripheral side surface of the sealing ring body is a polished surface.

6. A mechanical sealing structure suitable for latex production reaction according to claim 1, characterized in that: A support seat for supporting the stirring shaft is provided in the middle of the inner bottom surface of the reactor body. The support seat is a cylindrical structure with an open top. A shaft sleeve is provided on the outer side of the lower end of the stirring shaft. The shaft sleeve is accommodated inside the support seat. The top surface of the shaft sleeve is flush with the top surface of the support seat. A ring-shaped shaft sleeve pressing plate is provided above the shaft sleeve and is sleeved on the outer side of the stirring shaft. The shaft sleeve pressing plate and the support seat are connected by fasteners.

7. A mechanical seal structure suitable for latex production reaction according to claim 6, characterized in that: The shaft sleeve pressure plate is provided with a plurality of upper connecting screw holes which are evenly distributed in a circle around the axis of the shaft sleeve pressure plate, and the upper connecting screw holes pass through along the axis direction of the shaft sleeve pressure plate; the top surface of the support seat is provided with a plurality of lower connecting screw holes which are evenly distributed in a circle around the axis of the support seat, and the positions of the plurality of lower connecting screw holes correspond to the positions of the plurality of upper connecting screw holes, and locking bolts are connected between the upper connecting screw holes and the lower connecting screw holes which are in corresponding positions, and the locking bolts lock and fix the shaft sleeve pressure plate and the support seat.

8. A mechanical sealing structure suitable for latex production reaction according to claim 6, characterized in that: The shaft sleeve pressure plate is made of metal, and the outer diameter of the shaft sleeve pressure plate is the same as the outer diameter of the support seat; The supporting seat is cylindrical.

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