Nitrogen protection assembly for a profile extruder

Abstract

The utility model relates to a nitrogen protection assembly for section bar extruder, including the uniform distribution pipe that extends along the annular of extrusion cylinder inner wall, the gas inlet main pipe that communicates one side of uniform distribution pipe, the branch gas pipe that communicates the other side of uniform distribution pipe, a plurality of branch gas pipes are communicated on the uniform distribution pipe, branch gas pipe annular distribution around the uniform distribution pipe center, branch gas pipe extends along extrusion cylinder inner wall, branch gas pipe extends to extrusion cylinder import, the gas inlet main pipe is communicated and extends out of extrusion cylinder, and the gas inlet main pipe opening is equipped with the gas inlet joint. The utility model fills in extrusion cylinder with nitrogen through branch gas pipe, makes the mould export to be filled with inert nitrogen in extrusion cylinder, effectively prevents the oxidation effect of extrusion section bar and oxygen under high temperature, and the branch gas pipe of uniform distribution can make nitrogen more evenly distributed, and the uniform distribution pipe is convenient for the fixation of whole device in extrusion cylinder and the uniform distribution of nitrogen to branch gas pipe.

Description

Technical Field

[0001] This utility model relates to profile extrusion equipment, and in particular to a nitrogen protection component for a profile extruder. Background Technology

[0002] In the hot extrusion production of metals such as aluminum and copper profiles, the die operates under high temperature and high pressure. After being extruded from the die, the profile is in a high-temperature state, making it highly susceptible to reacting with oxygen and forming a hard oxide film on the profile surface. During the gradual cooling and shrinkage of the profile, the oxide film breaks down and partially peels off, resulting in an excessively high surface roughness. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a nitrogen protection component for profile extruders.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a nitrogen protection component for a profile extruder, comprising a uniformly distributed pipe extending circumferentially along the inner wall of the extrusion cylinder, a main air inlet pipe connected to one side of the uniformly distributed pipe, and a branch air pipe connected to the other side of the uniformly distributed pipe. The uniformly distributed pipe is connected to a plurality of the branch air pipes, which are distributed circumferentially around the center of the uniformly distributed pipe. The branch air pipes extend along the inner wall of the extrusion cylinder and extend to the inlet of the extrusion cylinder. The main air inlet pipe extends out of the extrusion cylinder, and the opening of the main air inlet pipe is provided with an air inlet connector.

[0005] As a further improvement to this design, the uniformly distributed pipe is composed of two semi-annular metal pipes spliced ​​together. The head of each semi-annular metal pipe is provided with a columnar plug, which is inserted into the tail of the other semi-annular metal pipe. An elastic sealing ring is provided on the outer sleeve of the plug. One end of the elastic sealing ring abuts against the head of one semi-annular metal pipe, and the other end of the elastic sealing ring abuts against the tail of the other semi-annular metal pipe. Multiple O-rings are provided on the outer periphery of the plug, and each semi-annular metal pipe is connected to a main intake pipe.

[0006] As a further improvement to this design, a one-way valve, a manual ball valve, and a main pressure reducing valve are connected in series on the air intake connector.

[0007] As a further improvement to this design, the uniformly distributed pipe is provided with a connecting pipe that corresponds one-to-one with the branch air pipe, the head of the branch air pipe is connected to a solenoid valve, and the connecting pipe is connected to the solenoid valve.

[0008] As a further improvement to this design, a branch pressure reducing valve is provided between the solenoid valve and the connecting pipe.

[0009] As a further improvement to this design, a temperature sensor is provided at the end of the branch trachea.

[0010] The beneficial effects of this utility model are: this utility model fills the extrusion cylinder with nitrogen through branch gas pipes, so that the mold outlet to the extrusion cylinder is filled with inert nitrogen, which effectively prevents the extruded profile from oxidizing with oxygen at high temperature; the evenly distributed branch gas pipes can make the nitrogen more evenly distributed; the evenly distributed pipes facilitate the fixation of the entire device in the extrusion cylinder and the even distribution of nitrogen to the branch gas pipes. Attached Figure Description

[0011] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0012] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model.

[0013] Figure 2 This is a front view of the present invention.

[0014] Figure 3 This utility model is in Figure 2 Schematic diagram of the cross-section at position AA.

[0015] In the diagram: 1. Manual ball valve, 2. Check valve, 3. Inlet connector, 4. Main inlet pipe, 5. Distribution pipe, 50. Semi-circular metal pipe, 51. Plug, 52. O-ring, 53. Elastic sealing ring, 6. Branch pressure reducing valve, 7. Solenoid valve, 8. Branch air pipe, 9. Temperature sensor, 10. Main pressure reducing valve, 11. Connecting pipe. Detailed Implementation

[0016] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. The illustrative embodiments and descriptions are only used to explain the present invention and are not intended to limit the present invention.

[0017] Example: A nitrogen protection assembly for a profile extruder includes a uniformly distributed pipe 5 extending annularly along the inner wall of the extrusion barrel, a main air inlet pipe 4 connecting one side of the uniformly distributed pipe 5, and a branch air pipe 8 connecting the other side of the uniformly distributed pipe 5. Multiple branch air pipes 8 are connected to the uniformly distributed pipe 5 and are distributed annularly around the center of the uniformly distributed pipe 5. The branch air pipes 8 extend along the inner wall of the extrusion barrel to the die pad and the innermost end of the extrusion barrel. The main air inlet pipe 4 extends out of the extrusion barrel and has an air inlet connector 3 at its opening.

[0018] The nitrogen gas is introduced into the extrusion cylinder through the branch gas pipe 8, so that the mold outlet and the extrusion cylinder are filled with inert nitrogen gas, which effectively prevents the extruded profile from oxidizing with oxygen at high temperature; the evenly distributed branch gas pipe 8 can make the nitrogen gas more evenly distributed; the evenly distributed pipe facilitates the fixation of the entire device in the extrusion cylinder and the even distribution of nitrogen gas to the branch gas pipe 8.

[0019] The uniform distribution tube 5 is composed of two semi-annular metal tubes 50 joined together. Each semi-annular metal tube 50 has a cylindrical plug 51 at its head, which is inserted into the tail of the other semi-annular metal tube 50. An elastic sealing ring 53 is fitted over the plug 51, with one end of the ring abutting the head of one semi-annular metal tube 50 and the other end abutting the tail of the other. Multiple O-rings 52 are fitted around the plug 51. Each semi-annular metal tube 50 is connected to a main intake pipe 4. The elastic sealing rings 53 can expand the uniform distribution tube 5, facilitating its engagement with the inner wall of the extrusion cylinder. Simultaneously, the plug 51 facilitates the stable joining of the two semi-annular metal tubes 50.

[0020] The air inlet connector 3 is connected in series with a one-way valve 2, a manual ball valve 1, and a main pressure reducing valve 10. The one-way valve 2 effectively prevents nitrogen backfilling from causing danger, the manual ball valve 1 facilitates shutting off the gas supply for maintenance, and the main pressure reducing valve 10 facilitates reducing the nitrogen pressure to a stable working pressure.

[0021] Gas source access: The nitrogen source is connected to the gas inlet connector 3 via a high-pressure hose or connector.

[0022] The uniformly distributed pipe 5 is provided with connecting pipes 11 corresponding to the branch air pipes 8 one by one. The head of each branch air pipe 8 is connected to a solenoid valve 7, and the connecting pipe 11 is connected to the solenoid valve 7. The solenoid valve 7 can control the opening and closing of each branch air pipe 8 as needed.

[0023] A branch pressure reducing valve 6 is provided between the solenoid valve 7 and the connecting pipe 11, which facilitates individual pressure control of the branch pressure reducing valve 6. For asymmetrical parts, the nitrogen flow rate can be adjusted to adjust the nitrogen filling effect.

[0024] The branch gas pipe 8 is equipped with a temperature sensor 9 at its tail end, which facilitates monitoring the temperature inside the extrusion cylinder and thereby controls the amount of nitrogen gas entering the cylinder to ensure a stable temperature inside the extrusion cylinder.

[0025] Monitoring Instrument Installation: A pressure gauge can be installed after the main pressure reducing valve to monitor the nitrogen charging pressure in real time. All temperature sensors 9 are electrically connected to the PLC controller, transmitting the detection signals to the PLC controller. The PLC controller is also connected to an emergency stop button and an alarm indicator light. The emergency stop button is used to cut off the power supply to the device in an emergency, and the alarm indicator light is used to illuminate when any pipeline pressure or temperature is abnormal. Furthermore, a branch pressure reducing valve 6 is installed on each of the branch gas pipes 8 to fine-tune the pressure of a single branch gas pipe 8 to adapt to the pressure requirements of different molds.

[0026] Control system connection: The PLC controller is connected to the solenoid valve 7 and the temperature sensor 9 respectively through signal cables, and is connected to the main control system of the extruder to receive its working status signals. Each branch gas pipe 8 is connected to a solenoid valve 7, and each outlet of the solenoid valve 7 is connected to a nitrogen filling connector. Each solenoid valve 7 is electrically connected to the PLC controller to realize independent on / off control of each branch gas pipe 8.

[0027] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A nitrogen protection assembly for a profile extruder, characterized in that, It includes a uniformly distributed pipe extending annularly along the inner wall of the extrusion cylinder, a main air inlet pipe connected to one side of the uniformly distributed pipe, and a branch air pipe connected to the other side of the uniformly distributed pipe. Multiple branch air pipes are connected to the uniformly distributed pipe. The branch air pipes are distributed annularly around the center of the uniformly distributed pipe. The branch air pipes extend along the inner wall of the extrusion cylinder and extend to the inlet of the extrusion cylinder. The main air inlet pipe extends out of the extrusion cylinder and has an air inlet connector at its opening.

2. The nitrogen protection component for a profile extruder according to claim 1, characterized in that, The uniformly distributed pipe is composed of two semi-annular metal pipes spliced ​​together. The head of each semi-annular metal pipe is provided with a columnar plug, which is inserted into the tail of the other semi-annular metal pipe. An elastic sealing ring is provided on the outer sleeve of the plug. One end of the elastic sealing ring abuts against the head of one semi-annular metal pipe, and the other end of the elastic sealing ring abuts against the tail of the other semi-annular metal pipe. Multiple O-rings are provided on the outer periphery of the plug. Each semi-annular metal pipe is connected to one intake main pipe.

3. A nitrogen protection assembly for a profile extruder according to claim 2, characterized in that, The air intake connector is connected in series with a one-way valve, a manual ball valve, and a main pressure reducing valve.

4. A nitrogen protection assembly for a profile extruder according to claim 1, characterized in that, The uniformly distributed pipe is provided with a connecting pipe that corresponds to each of the branch air pipes. The head of each branch air pipe is connected to a solenoid valve, and the connecting pipe is connected to the solenoid valve.

5. A nitrogen protection assembly for a profile extruder according to claim 4, characterized in that, A branch pressure reducing valve is provided between the solenoid valve and the connecting pipe.

6. A nitrogen protection assembly for a profile extruder according to any one of claims 1-5, characterized in that, A temperature sensor is installed at the end of the branch trachea.

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