Polyethylene foam material carbon dioxide leakage detection device

Abstract

The utility model discloses a polyethylene foaming material carbon dioxide leakage detection device which comprises a detection device and a gas tank, a gas inlet pipe is arranged on one side of the gas tank, a gas collection hopper is arranged on the upper end portion of the gas inlet pipe, a support is arranged in the gas collection hopper, a motor drives fan blades to rotate, and carbon dioxide leaked in the polyethylene foaming process is discharged out of the gas tank. Due to the connection effect among the air outlet pipe, the spiral blade and the air tank, the mixed air generates downward spiral accelerated movement under the guidance of the spiral blade, and water vapor is separated from the mixed air under the gravity and centrifugal effect; mixed air which falls to the inner bottom of the air tank at the outlet of the lower end of the spiral blade to be collected, is separated from water vapor and dried enters the air outlet pipe from the bottom end of the air outlet pipe and is conveyed into the detection device, so that the water vapor content in the air is prevented from influencing the detection result of the carbon dioxide content in the air, and the accuracy of the detection result is improved.

Description

Technical Field

[0001] This utility model relates to the field of detection device technology, and in particular to a carbon dioxide leakage detection device for polyethylene foam material. Background Technology

[0002] Polyethylene foaming is a processing technology that uses physical or chemical methods to form a honeycomb structure inside the material. It is widely used in packaging, construction, automobiles and other fields. In the process of polyethylene foaming, if supercritical carbon dioxide is used as a foaming agent, carbon dioxide needs to be injected into molten polyethylene under high pressure. There may be a risk of carbon dioxide leakage in this process. If the foaming is carried out by decomposing a chemical foaming agent to produce gas (such as nitrogen, carbon dioxide, etc.), the amount of carbon dioxide leakage is usually low. However, it is still necessary to detect carbon dioxide leakage. At this time, a carbon dioxide leakage detection device is needed to detect the carbon dioxide content in the air.

[0003] However, existing carbon dioxide leak detection devices, when detecting polyethylene foam materials, generate heat during the foaming process, whether through physical or chemical methods. This heat, when in contact with the outside air, easily produces water vapor. The mixture of air, water vapor, and carbon dioxide causes errors in the detection of carbon dioxide content. Therefore, a new carbon dioxide leak detection device for polyethylene foam materials is needed to meet people's needs. Summary of the Invention

[0004] The purpose of this invention is to provide a carbon dioxide leakage detection device for polyethylene foam materials to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a carbon dioxide leakage detection device for polyethylene foam material, comprising a detection device and a gas tank. An air inlet pipe is provided on one side of the gas tank, and a gas collecting hopper is provided at the upper end of the air inlet pipe. A support is provided inside the gas collecting hopper, and a motor is provided on the support. A fan blade is provided at the output end of the motor. An air outlet pipe is provided at the top of the gas tank and is connected to the air inlet end of the detection device. The air outlet pipe extends downward into the gas tank, and a spiral blade is provided between the inner wall of the gas tank and the outer wall of the air outlet pipe.

[0006] Preferably, the gas collecting hopper is equipped with a filter screen.

[0007] Preferably, a drain pipe is provided at the bottom of the gas tank.

[0008] Preferably, the drain pipe is provided with a collar, the bottom end of the drain pipe is closed and has a drain outlet, a screw is threadedly connected to the center, a knob is provided at the bottom end of the screw, and a sealing plug is provided at the top end of the screw, the sealing plug being fitted into the bottom end of the collar.

[0009] Preferably, the bottom end of the collar has a tapered hole, and the sealing plug is a corresponding tapered shape.

[0010] Preferably, the maximum outer diameter of the sealing plug is smaller than the inner diameter of the drain pipe.

[0011] Preferably, a threaded hole is provided at the center of the bottom end of the drain pipe, and the screw is threaded into the threaded hole.

[0012] The beneficial effects of this utility model are:

[0013] In this invention, a motor drives the fan blades to rotate, mixing the carbon dioxide leaked during the polyethylene foaming process with the generated heat and air. This mixture is then sent into the gas tank through the inlet pipe. Due to the connection between the outlet pipe, the spiral blades, and the gas tank, the mixed air undergoes a downward spiral acceleration under the guidance of the spiral blades. Water vapor separates from the mixed air under gravity and centrifugal force, falling to the bottom of the gas tank at the lower outlet of the spiral blades and being collected. The dried mixed air, separated from the water vapor, enters the outlet pipe from the bottom and is then transported into the detection device. This avoids the water vapor content in the air affecting the detection results of the carbon dioxide content in the air, thus improving the accuracy of the detection results. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of a carbon dioxide leakage detection device for polyethylene foam material proposed in this utility model;

[0015] Figure 2 This is a front cross-sectional view of a carbon dioxide leakage detection device for polyethylene foam material proposed in this utility model.

[0016] Figure 3 This utility model proposes a carbon dioxide leakage detection device for polyethylene foam materials. Figure 2 Enlarged structural diagram at point A in the middle;

[0017] Figure 4 This utility model proposes a carbon dioxide leakage detection device for polyethylene foam materials. Figure 2 Enlarged structural diagram at point B.

[0018] In the diagram: 1. Detection device; 2. Gas tank; 3. Inlet pipe; 4. Gas collection hopper; 5. Support; 6. Motor; 7. Fan blade; 8. Outlet pipe; 9. Spiral blade; 10. Filter screen; 11. Drain pipe; 12. Collar; 13. Drain outlet; 14. Screw; 15. Knob; 16. Sealing plug; 17. Tapered hole; 18. Threaded hole. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0020] Reference Figure 1-4 A carbon dioxide leakage detection device for polyethylene foam material includes a detection device 1 and a gas tank 2. An air inlet pipe 3 is provided on one side of the gas tank 2. An air collection hopper 4 is provided on the upper end of the air inlet pipe 3. A support 5 is provided inside the air collection hopper 4. A motor 6 is provided on the support 5. A fan blade 7 is provided on the output end of the motor 6. An air outlet pipe 8 is provided on the top of the gas tank 2. The air outlet pipe 8 is connected to the air inlet end of the detection device 1 and extends downward into the gas tank 2. A spiral blade 9 is provided between the inner wall of the gas tank 2 and the outer wall of the air outlet pipe 8.

[0021] The motor 6 drives the fan blades 7 to rotate, mixing the carbon dioxide leaked during the polyethylene foaming process with the generated heat and air. This mixture is then sent into the gas tank 2 through the air inlet pipe 3. Due to the connection between the air outlet pipe 8, the spiral blades 9, and the gas tank 2, the mixed air undergoes a downward spiral acceleration under the guidance of the spiral blades 9. Water vapor separates from the mixed air under gravity and centrifugal force, falling to the bottom of the gas tank 2 at the lower outlet of the spiral blades 9. The dried mixed air, separated from the water vapor, enters the air outlet pipe 8 from the bottom and is then transported into the detection device 1. This avoids the water vapor content in the air affecting the detection results of the carbon dioxide content in the air, thus improving the accuracy of the detection results.

[0022] Specifically, in this embodiment, a filter screen 10 is provided on the air collection hopper 4 to prevent dust in the air from entering the air tank 2 and the detection device 1.

[0023] Specifically, in this embodiment, a drain pipe 11 is provided at the bottom of the gas tank 2, which can be used to remove the water vapor collected in the gas tank 2.

[0024] Specifically, in this embodiment, a collar 12 is provided inside the drain pipe 11. The bottom end of the drain pipe 11 is closed and has a drain outlet 13. A screw 14 is threadedly connected to the center. A knob 15 is provided at the bottom end of the screw 14, and a sealing plug 16 is provided at the top end of the screw 14. The sealing plug 16 fits inside the bottom end of the collar 12 to ensure the sealing effect of the drain pipe 11 during the gas drying process, so as to ensure the flow direction of the gas. When draining, the screw 14 is rotated by the knob 15 to create a gap between the sealing plug 16 and the collar 12. Under the effect of airflow, the collected water vapor flows out from the gap and is discharged from the drain outlet 13 to the outside of the drain pipe 11, preventing the water vapor in the gas tank 2 from collecting too much water, causing the water level to rise to the bottom end of the gas outlet pipe 8, which would reduce the drying effect of the mixed gas.

[0025] Specifically, in this embodiment, a tapered hole 17 is provided on the bottom end of the collar 12, and the sealing plug 16 is a corresponding cone shape, which improves the sealing performance between the sealing plug 16 and the collar 12, and at the same time allows the sealing plug 16 to move a shorter distance to create a gap between the sealing plug 16 and the collar 12.

[0026] Specifically, in this embodiment, the maximum outer diameter of the sealing plug 16 is smaller than the inner diameter of the drain pipe 11, providing a gap for the discharge of water vapor.

[0027] Specifically, in this embodiment, a threaded hole 18 is provided at the center of the bottom end of the drain pipe 11, and the screw 14 is threaded into the threaded hole 18 to improve the connection effect between the screw 14 and the drain pipe 11 and ensure the stability of the sealing plug 16.

[0028] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A carbon dioxide leakage detection device for polyethylene foam material, comprising a detection device (1) and a gas tank (2), characterized in that: An air inlet pipe (3) is provided on one side of the gas tank (2). An air collecting hopper (4) is provided on the upper end of the air inlet pipe (3). A support (5) is provided inside the air collecting hopper (4). A motor (6) is provided on the support (5). A fan blade (7) is provided on the output end of the motor (6). An air outlet pipe (8) is provided on the top of the gas tank (2). The air outlet pipe (8) is connected to the air inlet end of the detection device (1). The air outlet pipe (8) extends downward into the gas tank (2). A spiral blade (9) is provided between the inner wall of the gas tank (2) and the outer wall of the air outlet pipe (8).

2. The carbon dioxide leakage detection device for polyethylene foam material according to claim 1, characterized in that: A filter screen (10) is provided on the gas collecting hopper (4).

3. The carbon dioxide leakage detection device for polyethylene foam material according to claim 1, characterized in that: A drain pipe (11) is provided at the bottom of the gas tank (2).

4. The carbon dioxide leakage detection device for polyethylene foam material according to claim 3, characterized in that: The drain pipe (11) is provided with a collar (12), the bottom end of the drain pipe (11) is closed and has a drain outlet (13), and a screw (14) is threaded at the center. A knob (15) is provided at the bottom end of the screw (14), and a sealing plug (16) is provided at the top end of the screw (14). The sealing plug (16) is fitted into the bottom end of the collar (12).

5. The carbon dioxide leakage detection device for polyethylene foam material according to claim 4, characterized in that: The bottom end of the collar (12) is provided with a conical hole (17), and the sealing plug (16) is a corresponding conical shape.

6. The carbon dioxide leakage detection device for polyethylene foam material according to claim 4, characterized in that: The maximum outer diameter of the sealing plug (16) is smaller than the inner diameter of the drain pipe (11).

7. The carbon dioxide leakage detection device for polyethylene foam material according to claim 3, characterized in that: A threaded hole (18) is provided at the center of the bottom end of the drain pipe (11), and the screw (14) is threaded into the threaded hole (18).

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