Anti-adhesion structure for lower surface of observation sight glass of polystyrene devolatilization device

Abstract

The utility model discloses a polystyrene devolatilization device observation sight glass lower surface anti-adhesion structure which comprises a devolatilization device body, a butterfly valve assembly is installed at the upper end of the devolatilization device body, the butterfly valve assembly comprises a flange, the upper end of the flange is fixedly connected with a seamless steel pipe, a butterfly valve is installed in the seamless steel pipe, and the flange is fixedly connected with the flange. After the improvement that the butterfly valve is additionally arranged between the devolatilization device body and the sight glass, the observation time is short, and the butterfly valve is in a closed state for a long time, so that the time that the lower surface of the sight glass is shielded by high-temperature melt floating up from the inside of equipment is greatly prolonged; long-term observation requirements can be met; besides, under the condition that the sealing effect of the valve element of the butterfly valve is very good, the sight glass of the styrene device can be replaced and cleaned on line even under the condition that a vacuum system is not affected, and therefore long-term stable operation of the production device is guaranteed.

Description

Technical Field

[0001] This utility model relates to the technical field of polymer material production equipment, and in particular to an anti-adhesion structure on the lower surface of the observation lens of a polystyrene devolatilization device. Background Technology

[0002] The polystyrene devolatilizer in a polystyrene plant has a sight glass near the top to observe the material level. During the manufacturing process, due to the vacuum created at the top of the devolatilizer, some of the polystyrene flocculent material floats up and adheres to the lower surface of the sight glass. This is especially problematic in production lines producing high-impact modified polystyrene, which contains a certain proportion of rubber and is opaque. Over time, the amount of polystyrene flocculent material adhering to the sight glass increases until the lower surface is completely obscured, making it impossible to observe the liquid level inside the devolatilizer. Utility Model Content

[0003] The purpose of this invention is to at least solve one of the technical problems existing in the prior art, and to provide a structure to prevent adhesion of the lower surface of the sight glass of a polystyrene devolatilizer. By adding a butterfly valve between the devolatilizer body and the sight glass, the observation time is short and the butterfly valve is in a closed state for a long time. This greatly extends the time that the lower surface of the sight glass is blocked by the high-temperature melt floating up from inside the equipment, thus meeting the observation requirements for a long time. In addition, if the valve core of the butterfly valve has a very good sealing effect, it is even possible to replace and clean the sight glass online without affecting the vacuum system of the styrene unit, thereby ensuring the long-term stable operation of the production unit.

[0004] This utility model also provides a structure for preventing adhesion of the lower surface of the observation lens of a polystyrene devolatilizer, comprising: a devolatilizer body, a butterfly valve assembly installed at the upper end of the devolatilizer body, the butterfly valve assembly including a flange, a seamless steel pipe fixedly connected to the upper end of the flange, a butterfly valve installed inside the seamless steel pipe, a sight glass flange cover fixedly connected to the upper end of the seamless steel pipe by fastening bolts, a sight glass being provided between the seamless steel pipe and the sight glass flange cover, and sealing gaskets being provided on the upper and lower surfaces of the sight glass, and the butterfly valve adopting a welded butterfly valve structure.

[0005] According to the present invention, a non-adhesive structure for the lower surface of the observation lens of a polystyrene devolatilizer is provided. The butterfly valve assembly is manually operated and does not rely on an electric or pneumatic system, thus avoiding the problem of inability to open or close due to power failure.

[0006] According to the present invention, a non-adhesive structure is provided on the lower surface of the observation sight glass of a polystyrene devolatilizer. The lower end of the flange is fixedly connected to the devolatilizer body by bolts. The sight glass is located above the butterfly valve to prevent polymer melt from being directly deposited on the surface of the sight glass. The butterfly valve can block the rise of downstream material.

[0007] Compared with existing technologies, the anti-adhesion structure on the lower surface of the sight glass of this polystyrene devolatilizer, through the modification of adding a butterfly valve between the devolatilizer body and the sight glass, greatly extends the time that the lower surface of the sight glass is blocked by the high-temperature melt floating up from inside the equipment, which is relatively short for observation time and the butterfly valve is in a closed state for a long time. This can meet the observation requirements for a long time. In addition, if the valve core of the butterfly valve has a very good sealing effect, it is even possible to replace and clean the sight glass online without affecting the vacuum system of the styrene unit, thereby ensuring the long-term stable operation of the production unit. Attached Figure Description

[0008] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0009] Figure 1 This is an overall structural diagram of the anti-adhesion structure on the lower surface of the observation lens of the polystyrene devolatilizer of this utility model;

[0010] Figure 2 This is a schematic diagram of the butterfly valve assembly connection for the anti-adhesion structure on the lower surface of the observation lens of the polystyrene devolatilizer of this utility model.

[0011] Legend:

[0012] 1. Damper body; 2. Butterfly valve assembly; 201. Flange; 202. Butterfly valve; 203. Sight glass; 204. Sight glass flange cover; 205. Seamless steel pipe; 206. Sealing gasket. Detailed Implementation

[0013] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0014] Reference Figure 1 and Figure 2This utility model provides an anti-adhesion structure for the lower surface of the observation lens of a polystyrene devolatilizer, comprising: a devolatilizer body 1, a butterfly valve assembly 2 installed at the upper end of the devolatilizer body 1, the butterfly valve assembly 2 including a flange 201, a seamless steel pipe 205 fixedly connected to the upper end of the flange 201, a butterfly valve 202 installed inside the seamless steel pipe 205, a sight lens flange cover 204 fixedly connected to the upper end of the seamless steel pipe 205 by fastening bolts, a sight lens 203 disposed between the seamless steel pipe 205 and the sight lens flange cover 204, sealing gaskets 206 respectively disposed on the upper and lower surfaces of the sight lens 203, the butterfly valve 202 adopts a welded butterfly valve structure, the butterfly valve assembly 2 is manually operated, the lower end of the flange 201 is fixedly connected to the devolatilizer body 1 by bolts, and the sight lens 203 is located above the butterfly valve 202;

[0015] Specifically, the butterfly valve adopts a welded butterfly valve structure (the welded butterfly valve structure consists of a valve body, valve plate, valve stem, valve seat seal, and welded flange, etc., which is an existing structure. By rotating the valve stem, the valve plate is driven to rotate parallel to the seamless steel pipe 205, which can be opened for observation. When the valve stem rotates in the opposite direction, the valve plate is perpendicular to the seamless steel pipe 205, which can form a seal). The flange 201 is connected to the devourer body 1 and is fastened to achieve a sealing effect. The butterfly valve 202 is connected between the flange 201 and the sight glass flange cover 204 through the seamless steel pipe 205. By controlling the open or closed state of the butterfly valve 202, the observer can observe the material level inside the devourer body 1 through the sight glass 203. The sight glass 203 plays a sealing role through the combined action of the sight glass flange cover 204, fasteners, and sealing gasket 206.

[0016] Working principle: Flange 201 is connected to the devolatilizer body 1 and tightened to achieve a sealing effect. Butterfly valve 202 is connected between flange 201 and sight glass flange cover 204 through seamless steel pipe 205. By controlling the open or closed state of butterfly valve 202, the observer can observe the material level inside devolatilizer body 1 through sight glass 203. Sight glass 203 plays a sealing role through the combined action of sight glass flange cover 204, fasteners and sealing gasket 206. When it is necessary to observe the liquid level inside devolatilizer body 1, butterfly valve 202 is fully opened. After the observation is completed, butterfly valve 202 is closed. Butterfly valve 202 is normally closed.

[0017] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A structure for preventing adhesion of a lower surface of a sight glass of a polystyrene devolatilizer, characterized by, include: The devourer body (1) has a butterfly valve assembly (2) installed at its upper end. The butterfly valve assembly (2) includes a flange (201). A seamless steel pipe (205) is fixedly connected to the upper end of the flange (201). A butterfly valve (202) is installed inside the seamless steel pipe (205). A sight glass flange cover (204) is fixedly connected to the upper end of the seamless steel pipe (205) by fastening bolts. A sight glass (203) is provided between the seamless steel pipe (205) and the sight glass flange cover (204). Sealing gaskets (206) are provided on the upper and lower surfaces of the sight glass (203). The butterfly valve (202) adopts a welded butterfly valve structure.

2. The anti-sticking structure of the lower surface of the observation window of a polystyrene devolatilizer according to claim 1, characterized in that, The butterfly valve assembly (2) is operated manually.

3. The anti-sticking structure of the lower surface of the observation window of a polystyrene devolatilizer according to claim 1, characterized in that, The lower end of the flange (201) is fixedly connected to the body (1) of the escape valve by bolts, and the sight glass (203) is located above the butterfly valve (202).

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