Vacuum communication device for polyester

Abstract

The utility model relates to a vacuum communication device for polyester, which comprises a three-way connector, the three-way connector comprises a feed port, a first discharge port and a second discharge port, the feed port is connected with a first pipeline, the first discharge port is connected with a second pipeline, and the second discharge port is connected with a third pipeline. The utility model has the advantages that the first pipeline, the second pipeline and the third pipeline which are connected through the three-way connector are respectively connected with the prepolymer hot ethylene glycol recycling and adding device, the polymer vacuum system and the final polymer vacuum system; the polymer vacuum system and the final polymer vacuum system are thermally flushed through ethylene glycol in the prepolymer hot ethylene glycol recycling and adding device, and the prepolymer is driven to form vacuum at the same time, so that the vacuum degree of the production of the prepolymer is ensured and maintained, and the normal production is ensured.

Description

Technical Field

[0001] This utility model relates to a vacuum communication device for polyester. Background Technology

[0002] Polymerization is a process that converts small monomer molecules into high polymer molecules through chemical reactions. It is widely used in chemical engineering, materials manufacturing and other fields. Its core is to achieve the directional growth of molecular chains through different processes (such as emulsion method and gas phase method) to form polymer products that meet performance requirements. In the current polymerization process of polyethylene terephthalate, problems often occur due to blockage of the vacuum system, resulting in poor vacuum degree of the prepolymer or final polymer reaction. The conventional method is to shut down for maintenance, which is time-consuming and labor-intensive. Utility Model Content

[0003] The purpose of this invention is to solve the problem of poor vacuum degree in the reaction of prepolymer or final polymer caused by blockage in the existing polyester vacuum system. It proposes a vacuum connection device for polyester, which connects to a prepolymer hot ethylene glycol recycling and addition device, a polymer vacuum system, and a final polymer vacuum system via a three-way connector. The prepolymer hot ethylene glycol recycling and addition device uses ethylene glycol to hotly flush the polymer vacuum system and the final polymer vacuum system, simultaneously creating a vacuum in the prepolymer, ensuring the vacuum degree of prepolymer production is maintained, and thus guaranteeing normal production.

[0004] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution: a vacuum connecting device for polyester, including a three-way connector, the three-way connector including an inlet, a first outlet and a second outlet, a first pipe connected to the inlet for connecting to a prepolymer hot ethylene glycol recycling and addition device, a second pipe connected to the first outlet for connecting to a prepolymer vacuum system or a final polymer vacuum system, and a third pipe connected to the second outlet for connecting to a prepolymer vacuum system or a final polymer vacuum system, each of the first, second and third pipes being equipped with a control valve.

[0005] Preferably, the first pipe, the second pipe, and the third pipe each include a first connecting pipe and a second connecting pipe, one end of the first connecting pipe is fixedly connected to a tee connector, and the control valve is disposed between the other end of the first connecting pipe and the second connecting pipe.

[0006] Preferably, the first connecting pipe is a stainless steel pipe, and the second connecting pipe is a flexible metal hose.

[0007] Preferably, the first connecting pipe and / or the second connecting pipe are provided with a nameplate.

[0008] Preferably, the control valve is a ball valve.

[0009] Preferably, the tee connector is a stainless steel connector.

[0010] Preferably, the tee connector is a T-type connector or a Y-type connector.

[0011] Preferably, the vacuum connection device for polyester further includes a bracket, and the tee connector is disposed on the bracket. The tee connector is mounted on the housing of the prepolymer hot ethylene glycol recycling and addition device, or on the housing of the prepolymer vacuum system, or on the housing of the final polymer vacuum system via the bracket.

[0012] Preferably, the bracket is equipped with a controller connected to the control valve.

[0013] Preferably, the bracket includes a horizontal part and a vertical part, the horizontal part is disposed on the vertical part, the tee connector is disposed on the vertical part, and the controller is disposed at the bottom end of the horizontal part.

[0014] In summary, the advantages of this utility model are as follows: The first, second, and third pipes connected via the tee connector are respectively connected to the prepolymer hot ethylene glycol recycling and addition device, the polymer vacuum system, and the final polymer vacuum system. The ethylene glycol hot flushing of the prepolymer hot ethylene glycol recycling and addition device simultaneously creates a vacuum in the prepolymer, ensuring the vacuum level for prepolymer production is maintained, thus guaranteeing normal production. Secondly, the control valve allows for precise control of the flow and pressure within the first, second, and third pipes, ensuring they operate under optimal conditions. This effectively improves the service life of the entire polyester vacuum connection device and reduces subsequent maintenance costs. Finally, by connecting the second and third pipes to either the prepolymer vacuum system or the final polymer vacuum system, the installation position of the tee connector can be adjusted according to the actual installation environment to meet different installation requirements. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings:

[0016] Figure 1 This is a schematic diagram of the structure of a vacuum communication device for polyester according to the present invention;

[0017] Figure 2 This is a schematic diagram of the support structure in this utility model.

[0018] Figure label:

[0019] 1. T-joint, 11. Inlet, 12. First outlet, 13. Second outlet, 2. First pipe, 3. Second pipe, 4. Third pipe, 5. Control valve, 6. First connecting pipe, 7. Second connecting pipe, 8. Nameplate, 9. Bracket, 90. Controller, 91. Horizontal part, 92. Vertical part. Detailed Implementation

[0020] like Figure 1 and Figure 2 As shown, a vacuum communication device for polyester includes a three-way connector 1. The three-way connector 1 includes an inlet 11, a first outlet 12, and a second outlet 13. The inlet 11 is connected to a first pipe 2 for connecting to a prepolymer hot ethylene glycol recycling and addition device. The first outlet 12 is connected to a second pipe 3 for connecting to a prepolymer vacuum system or a final polymer vacuum system. The second outlet 13 is connected to a third pipe 4 for connecting to a prepolymer vacuum system or a final polymer vacuum system. Each of the first pipe 2, the second pipe 3, and the third pipe 4 is equipped with a control valve 5.

[0021] The first, second, and third pipes connected via the tee connector are respectively connected to the prepolymer hot ethylene glycol recycling and addition device, the polymer vacuum system, and the final polymer vacuum system. The prepolymer hot ethylene glycol recycling and addition device flushes the polymer vacuum system and the final polymer vacuum system, simultaneously creating a vacuum in the prepolymer, ensuring the vacuum level for prepolymer production and thus guaranteeing normal production. Secondly, the control valves precisely control the flow and pressure within the first, second, and third pipes, ensuring they operate under optimal conditions. This effectively extends the lifespan of the entire polyester vacuum connection device and reduces subsequent maintenance costs. Finally, by setting the second and third pipes to connect to either the prepolymer vacuum system or the final polymer vacuum system, the installation position of the tee connector can be adjusted according to the actual installation environment to meet different installation requirements.

[0022] The first pipe 2, the second pipe 3, and the third pipe 4 each include a first connecting pipe 6 and a second connecting pipe 7. One end of the first connecting pipe 6 is fixedly connected to the tee connector 1. The control valve 5 is located between the other end of the first connecting pipe 6 and the second connecting pipe 7. The first pipe 2, the second pipe 3, and the third pipe 4 are formed by the first connecting pipe and the second connecting pipe. Since the control valve is located between the first connecting pipe and the second connecting pipe, it is convenient to install and fix the control valve. In this embodiment, the first connecting pipe and the tee connector can be connected by thread, welding, or flange to meet different installation requirements. Welding is preferred, as it can improve the connection strength and sealing performance between the first connecting pipe and the tee connector and reduce the loosening of the first connecting pipe. Specifically, the first connecting pipe 6 is a stainless steel pipe, and the second connecting pipe 7 is a flexible metal hose. Using a stainless steel pipe for the first connecting pipe and a flexible metal hose for the second connecting pipe facilitates adjustment of the installation angle of the second connecting pipe, allowing the first, second, and third pipes to meet different installation environments. The stainless steel pipe effectively improves connection strength and prevents pipe deformation. Furthermore, it makes the first, second, and third pipes resistant to acids, alkalis, and high-temperature media, thus extending their overall service life. A nameplate 8 is provided on the first connecting pipe 6 and / or the second connecting pipe 7. The nameplate facilitates subsequent inspection and maintenance by operators, and its position can be adjusted according to the actual installation environment to meet different operational needs.

[0023] The control valve 5 is a ball valve. The ball valve's small size and light weight improve installation quality and eliminate installation direction limitations, allowing for vertical or horizontal installation. It also extends service life, reduces maintenance costs, and lowers pipeline pressure loss, thus improving transport efficiency. The tee connector 1 is a stainless steel connector. Stainless steel offers excellent corrosion resistance, effectively resisting ethylene glycol corrosion and extending its service life. It also reduces overall weight, saving installation costs. Furthermore, the smooth inner wall reduces flow resistance. The tee connector 1 can be a T-type or Y-type connector, allowing selection based on the installation environment. This embodiment prioritizes a T-type connector due to its simple manufacturing process, smaller installation space, and adaptability to different pipe diameters, meeting diverse installation requirements.

[0024] The vacuum connection device for polyester also includes a bracket 9. The tee connector 1 is mounted on the bracket 9. The tee connector 1 is installed on the housing of the prepolymer hot ethylene glycol recycling and addition device, the housing of the prepolymer vacuum system, or the housing of the final polymer vacuum system via the bracket 9. The bracket allows the tee connector to be stably installed on the housing of the prepolymer hot ethylene glycol recycling and addition device, the housing of the prepolymer vacuum system, or the housing of the final polymer vacuum system, and the installation position can be selected according to the actual installation environment to meet different installation requirements. Specifically, the bracket 9 is equipped with a controller 90 connected to the control valve 5. The controller enables automated operation of the control valve, achieving precise control of flow and pressure, and reducing manual operation. The bracket 9 includes a horizontal part 91 and a vertical part 92. The horizontal part 91 is disposed on the vertical part 92, the tee connector 1 is disposed on the vertical part 92, and the controller 90 is disposed at the bottom end of the horizontal part 91. By placing the tee connector on the vertical part and the controller at the bottom end of the horizontal part, the tee connector and the controller can be installed independently on the bracket, without spatial interference during installation, which greatly improves the installation quality of the tee connector and the controller. In this embodiment, the tee connector can be fixed to the vertical part by a clamp or bolt assembly, which facilitates the installation and disassembly of the tee connector. The specific installation structure can be adjusted according to the actual installation environment. The specific installation structure is existing technology and will not be described in detail in this embodiment. In this embodiment, the bracket adopts an integrated structure, which simplifies the installation process between the horizontal and vertical parts, improves the overall installation strength of the bracket, and facilitates the processing and forming of the bracket.

[0025] In addition to the preferred embodiments described above, there are other embodiments of this utility model. Those skilled in the art can make various changes and modifications based on this utility model. As long as they do not depart from the spirit of this utility model, they should all fall within the scope defined by the appended claims.

Claims

1. A vacuum communication device for polyester, characterized in that: The device includes a three-way connector (1), which includes an inlet (11), a first outlet (12), and a second outlet (13). The inlet (11) is connected to a first pipe (2) for connecting to a prepolymer hot ethylene glycol recycling and addition device. The first outlet (12) is connected to a second pipe (3) for connecting to a prepolymer vacuum system or a final polymer vacuum system. The second outlet (13) is connected to a third pipe (4) for connecting to a prepolymer vacuum system or a final polymer vacuum system. Each of the first pipe (2), the second pipe (3), and the third pipe (4) is equipped with a control valve (5).

2. The vacuum communication device for polyester according to claim 1, characterized in that: The first pipe (2), the second pipe (3) and the third pipe (4) each include a first connecting pipe (6) and a second connecting pipe (7). One end of the first connecting pipe (6) is fixedly connected to the tee connector (1), and the control valve (5) is located between the other end of the first connecting pipe (6) and the second connecting pipe (7).

3. The vacuum communication device for polyester according to claim 2, characterized in that: The first connecting pipe (6) is a stainless steel pipe, and the second connecting pipe (7) is a metal flexible hose.

4. A vacuum communication device for polyester according to claim 3, characterized in that: A nameplate (8) is provided on the first connecting pipe (6) or / and the second connecting pipe (7).

5. A vacuum communication device for polyester according to claim 2, characterized in that: The control valve (5) is a ball valve.

6. A vacuum communication device for polyester according to claim 1, characterized in that: The tee connector (1) is a stainless steel connector.

7. A vacuum communication device for polyester according to claim 6, characterized in that: The tee connector (1) is a T-type connector or a Y-type connector.

8. A vacuum communication device for polyester according to claim 1, characterized in that: The vacuum connection device for polyester also includes a bracket (9), and the three-way connector (1) is disposed on the bracket (9). The three-way connector (1) is installed on the housing of the prepolymer hot ethylene glycol recycling and addition device, or on the housing of the prepolymer vacuum system, or on the housing of the final polymer vacuum system via the bracket (9).

9. A vacuum communication device for polyester according to claim 8, characterized in that: The bracket (9) is equipped with a controller (90) connected to the control valve (5).

10. A vacuum communication device for polyester according to claim 9, characterized in that: The bracket (9) includes a horizontal part (91) and a vertical part (92). The horizontal part (91) is disposed on the vertical part (92), the tee connector (1) is disposed on the vertical part (92), and the controller (90) is disposed at the bottom of the horizontal part (91).

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