Fluid shaping valve

Abstract

The utility model relates to the field of paste resin production, in particular to a fluid shaping valve which comprises an electric actuator and a main valve body. The main valve body comprises a valve element and an outer shell, and the outer shell is arranged on the outer side of the valve element in a sleeving mode. The outer shell is connected with the top of the VCM gas-liquid separation tower through a flange; the output end of the electric actuator is connected with the top of the valve element and controls lifting of the valve element, and a shaping plate is arranged at the bottom of the valve element. The space between the outer shell and the valve element provides a tangible latex channel allowing latex to flow, and the latex is sprayed out through an annular gap between the bottom of the outer shell and the shaping plate. A material inlet is formed in one side of the upper portion of the outer shell. The material spraying area and spraying strength are controlled by controlling the spraying shape of the material, the flux of the outlet of the shaping valve and the pressure of the material, and fine adjustment of multiple parameters of material spraying is achieved, so that the pre-achieved fluid spraying shape is achieved, and the material is prevented from adhering to the wall.

Description

Technical Field

[0001] The utility model relates to the field of paste resin production, in particular to a fluid shaping valve for removing VCM monomers in paste resin production. Background Technique

[0002] As the name implies, polyvinyl chloride (PVC) paste resin is mainly applied in the form of paste. This kind of paste is often called plasticizer paste, which is a unique liquid form of polyvinyl chloride plastic in the unprocessed state.

[0003] In the process of paste resin production, the VCM recovery unit is a crucial link in the whole production process. Stripping VCM is a continuous process. The stripping tower process pumps the paste resin latex into a stripping tower. While the latex is sprayed from top to bottom, steam is sprayed from the lower part of the tower for heating. Under vacuum conditions, the VCM monomer is separated from the latex, and the latex is discharged from the bottom of the stripping tower and sent to the next unit, while the VCM monomer is discharged from the top of the tower and enters the subsequent process link.

[0004] The existing process is to spray with a pipe distributor or a nozzle, so that the material is sprayed downward. However, this method is not suitable for materials with relatively high viscosity (viscosity of 10-20 cp) such as resins and materials that may contain particles. It is easy to block at the nozzle and the pipe openings, and cannot meet the needs of the production process in terms of spraying area, spraying liquid surface shape, spraying intensity, etc. This makes the latex easy to spray onto the inner wall of the stripping tower, affecting the removal of VCM monomers and the recovery of latex. In addition, the existing process scheme cannot adjust and control multiple parameters of material spraying, so the spraying shape and area of the fluid cannot be controlled, which may cause the material to be sprayed onto the tower wall. Content of the Utility Model

[0005] The purpose of the utility model is to provide a fluid shaping valve, which controls the spraying area and spraying intensity of the material by controlling the spraying shape of the material, the flux at the outlet of the shaping valve and the pressure of the material, realizes the fine adjustment of multiple parameters of material spraying, and avoids material sticking to the wall.

[0006] The purpose of the utility model is to provide a fluid shaping valve, which includes an electric actuator and a main valve body; the main valve body includes a valve core and an outer shell, and the outer shell is sleeved outside the valve core; the outer shell is connected to the top of the VCM gas-liquid separation tower through a flange; the output end of the electric actuator is connected to the top of the valve core and controls the lifting of the valve core, and a shaping plate is arranged at the bottom of the valve core; the space between the outer shell and the valve core provides a channel with a certain shape for the latex to flow, and the latex is ejected through the annular gap between the bottom of the outer shell and the shaping plate; a material inlet is arranged on one side above the outer shell.

[0007] As a preferred technical solution, the shapes of the outer housing and the valve core are matching circles or squares.

[0008] As a preferred technical solution, the cross-sectional shapes of the outer housing and the matching valve core are circles or squares.

[0009] As a preferred technical solution, a plurality of spray holes are provided at a position on the shaping plate opposite to the glue liquid channel.

[0010] As a preferred technical solution, the cross-section of the shaping plate is adapted to the shape and size of the inner cavity of the outer casing.

[0011] As a preferred technical solution, the bottom of the shaping plate is flush, and the top is a flat top or an arc top.

[0012] The beneficial effects of the present utility model are as follows:

[0013] 1. By setting a fluid shaping valve, the flux, intensity, area, and shape of the latex spray can be finely adjusted, solving the problem that multiple parameters of traditional material spraying cannot be adjusted, making the spraying area of the latex as large as possible while avoiding the spraying liquid sticking to the wall.

[0014] 2. The space between the outer housing and the valve core of the fluid plastic valve provides a large-flux channel with a certain shape for the latex to flow. The latex is ejected through the adjustable gap between the bottom of the outer housing and the shaping plate, solving the problem that materials in this field are prone to clogging the spray holes. Description of the Drawings

[0015] Figure 1 It is a schematic diagram of the fluid shaping valve of the present utility model.

[0016] In the figure: 1. Electric actuator; 2. Valve core; 3. Outer housing; 4. Shaping plate; 5. Material inlet. Detailed Embodiments

[0017] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the embodiments of the present utility model; obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0018] Such as Figure 1As shown in the figure, the utility model provides a fluid shaping valve. The fluid shaping valve 4 includes an electric actuator 1 and a main valve body. The main valve body includes a valve core 2 and an outer casing 3. The top of the valve core 2 is connected to the output end of the electric actuator 1, and the bottom is provided with a shaping plate 4 which is the core component for controlling the spraying parameters. The cross-section of the shaping plate 4 is adapted to the shape and size of the inner cavity of the outer casing, and the bottom of the shaping plate 4 is flush with the bottom, and the top can be set as a flat top or an arc top. The outer casing 3 is sleeved outside the valve core 2, and the outer casing 3 is connected to the top of the VCM gas-liquid separation tower 3 through a flange. On one side above the outer casing 3, there is a material inlet 5, and the material inlet 5 is connected to the discharging end of the Venturi ejector 22 through a corresponding pipeline. Since the space between the outer casing 3 and the valve core 2 provides a large-flux latex channel for the latex to flow, the latex is ejected through the adjustable gap between the bottom of the outer casing 3 and the shaping plate 4. The design of this large-flux latex channel not only provides enough flow space for the latex, but also enables the latex to receive uniform pressure and velocity distribution during the flowing process, solving the problem that the materials in this field are easy to block the spraying channels. The material inlet 5 is obliquely downward connected to the main valve body to reduce the feeding resistance and ensure that the latex can smoothly enter the fluid shaping valve 4.

[0019] In actual production, the lengths of the valve core 2 and the outer casing 3 can be changed according to the working conditions to change the spraying height. In addition, the electric actuator 1 can use compressed air or electricity as the power source to control the lifting of the valve core 2, thereby realizing the adjustment of the spraying intensity and area. The specific principle is as follows: when the input amount of the latex remains unchanged, the closer the shaping plate 4 is to the bottom of the outer casing, the smaller the gap between them, the higher the spraying intensity, and the larger the spraying area. On the contrary, the farther the shaping plate 4 is from the bottom of the outer casing, the lower the spraying intensity and the smaller the spraying area. As is well known, the larger the spraying area of the latex, the better the removal effect of the VCM. However, if the spraying area is too large, a considerable part of the latex will be sprayed onto the tower wall. Therefore, in actual production, the spraying shape can also be changed by changing the cross-sectional shapes of the outer casing 3 and the supporting valve core 4, such as changing them both to circular or square shapes, and multiple spraying holes can also be provided at the position on the shaping plate 4 facing the latex channel; or only changing the top shape of the shaping plate 4, such as setting the top curve of the shaping plate 4 as an umbrella shape with a certain rule, so as to effectively control the shape of the spraying liquid, make the spraying area of the latex as large as possible, and at the same time avoid the spraying liquid sticking to the wall.

[0020] Although the present utility model has been described above with reference to the embodiments, various improvements can be made thereto and components thereof can be replaced with equivalents without departing from the scope of the present utility model. In particular, as long as there is no structural conflict, the various features in the embodiments disclosed by the present utility model can be combined with each other in any way, and the exhaustive description of these combinations is not given in this specification only for the consideration of saving space and resources. Therefore, the present utility model is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A fluid shaping valve, characterized in that: It includes an electric actuator and a main valve body; the main valve body includes a valve core and an outer shell, and the outer shell is sleeved on the outside of the valve core; the outer shell is connected to the top of the VCM gas-liquid separation tower through a flange; the output end of the electric actuator is connected to the top of the valve core and controls the lifting and lowering of the valve core, and a shaping plate is provided at the bottom of the valve core; the space between the outer shell and the valve core provides a latex channel with a certain shape for the flow of latex, and the latex is ejected through the annular gap between the bottom of the outer shell and the shaping plate; a material inlet is provided on one side above the outer shell.

2. The fluid shaping valve according to claim 1, characterized in that: The outer shell and the valve core are in matching circular or square shapes.

3. The fluid shaping valve according to claim 1, characterized in that: The cross-sectional shape of the outer shell and the matching valve core is circular or square.

4. The fluid shaping valve according to claim 1, characterized in that: A plurality of spray holes are arranged on the shaping plate at positions facing the glue channel.

5. The fluid shaping valve according to claim 1, characterized in that: The cross section of the shaping plate is adapted to the shape and size of the inner cavity of the outer sleeve.

6. The fluid shaping valve according to claim 1, characterized in that: The bottom of the shaping plate is flush, and the top is flat or curved.

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