Mixing device for CO2 and N2 mixed foaming agent

Abstract

The utility model relates to the technical field of foaming agent production, and discloses a mixing device for a CO2 and N2 mixed foaming agent, which comprises a mixing tank, support legs fixedly connected to the lower surface of the mixing tank, a top cover arranged at the top end of the mixing tank, a pressure release valve arranged on the surface of the top cover, two groups of air inlet pipes fixedly communicated with the surface of the top cover, and flow control valves arranged on the surfaces of the air inlet pipes. The air inlet end of the air inlet pipe is slidably connected with a fixing part, a connecting mechanism is arranged in the fixing part, and a stirring mechanism is arranged in the mixing tank; the sealing rubber ring abuts against the inner wall of the gas inlet pipe, the sealing effect is guaranteed, good sealing performance is ensured, the carbon dioxide gas pipe and the nitrogen gas pipe are easy and convenient to assemble and disassemble, carbon dioxide and nitrogen can be conveniently introduced into the mixing tank, a foaming agent attached to the inner wall of the mixing tank can be removed, the foaming agent can be conveniently discharged, and the service life of the mixing tank is prolonged. The mixing efficiency of the raw materials is improved, so that stirring is more sufficient and the mixing efficiency is high.

Description

Technical Field

[0001] The utility model relates to the technical field of foaming agent production, in particular to a mixing device for mixing CO2 and N2 foaming agents. Background Art

[0002] Foaming agent is a substance that makes the object material pore-forming. It can be divided into three categories: chemical foaming agent, physical foaming agent and surfactant. In the process of producing foaming agent for carbon dioxide extruded board, a variety of raw materials are involved, and a variety of different raw materials need to be mixed and stirred during processing. CO2 and N2 mixed foaming agent is a physical foaming agent used in the processing of plastics, rubber and other materials. It generates bubbles by mixing carbon dioxide (CO2) and nitrogen (N2), and then forms a microporous structure inside the material to improve the performance of the material. This foaming agent has been widely used in many fields due to its advantages such as environmental friendliness, non-toxicity and cost-effectiveness. Existing foaming agent mixing equipment generally adopts a relatively sealed structure, leaving only a feed port and a discharge port. The operation of connecting external CO2 and N2 is relatively cumbersome, and the sealing is difficult to ensure. After the foaming agent mixing equipment finishes mixing and stirring the foaming agent, the foaming agent will be discharged, but there will still be residual foaming agent inside the foaming agent mixing equipment, which makes it impossible to discharge, affecting the quality of subsequent mixing of the foaming agent. To this end, a mixing device for mixing CO2 and N2 as a mixed foaming agent is proposed. Utility Model Content

[0003] The purpose of the utility model is to provide a mixing device for mixing CO2 and N2 as a foaming agent to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a mixing device for a CO2 and N2 mixed foaming agent, comprising a mixing tank, a lower surface of the mixing tank is fixedly connected to a support leg, a top cover is arranged on the top of the mixing tank, a pressure relief valve is arranged on the surface of the top cover, two groups of air inlet pipes are also fixedly connected to the surface of the top cover, a flow control valve is arranged on the surface of the air inlet pipe, an air inlet end of the air inlet pipe is slidably connected to a fixing piece, a connecting mechanism is arranged in the fixing piece, the two groups of air inlet pipes are respectively connected to a carbon dioxide air pipe and a nitrogen air pipe through the connecting mechanism in the fixing piece, and a stirring mechanism is arranged inside the mixing tank.

[0005] As a preferred embodiment, the connecting mechanism includes a pressure block, a return spring, a ball groove and a limit ball. The inlet end of the intake pipe is slidably connected to a fixing piece, the inner wall of the fixing piece is fixedly connected to a pressure block, a spring cavity is formed between the pressure block and the connecting pipe, a return spring is arranged on the inner wall of the spring cavity, and one end of the intake pipe is provided with evenly arranged ball grooves, and a limit ball is placed on the inner wall of the ball groove.

[0006] As a preferred solution, one end of the carbon dioxide gas pipe and the nitrogen gas pipe are provided with a limiting groove and an annular groove, the limiting groove fits with the limiting ball, and a sealing rubber ring is fixedly connected to the inner wall of the annular groove, so that the carbon dioxide gas pipe and the nitrogen gas pipe can be inserted into the intake pipe.

[0007] As a preferred embodiment, the stirring mechanism includes a transmission rod, a spiral blade, a support rod, a scraper and a driving motor. The inner wall of the mixing tank is rotatably connected to the transmission rod, the surface of the transmission rod is fixedly connected to the spiral blade, and the spiral blade is shuttle-shaped. The surface of the transmission rod is also fixedly connected to the support rod, and one end of the support rod is fixedly connected to the scraper, the scraper is inclined and the scraping surface of the scraper abuts against the inner wall of the tank body.

[0008] As a preferred solution, a driving motor is fixedly connected to the upper surface of the top cover, and a power output end of the driving motor is fixedly connected to one end of the transmission rod.

[0009] As a preferred solution, the top cover surface is fixedly connected with a feeding cover, the lower surface of the mixing tank is fixedly connected with a discharge pipe, and a stop valve is provided at the outlet end of the discharge pipe.

[0010] As a preferred solution, a controller is fixedly connected to the side wall of the mixing tank, and the drive motor and the flow control valve are electrically connected to an external power supply through the controller.

[0011] Technical effects and advantages of the utility model:

[0012] 1. When connecting the carbon dioxide gas pipe and the nitrogen gas pipe, you can first dial the fixing piece, the movement of the fixing piece drives the pressure block to move, the pressure block moves and compresses the reset spring, so that the reset spring is in a compressed state, and then directly connect the carbon dioxide gas pipe and the nitrogen gas pipe, loosen the fixing piece, the reset spring loses pressure and returns to the initial state, one end of the reset spring moves to drive the pressure block to move, the pressure block moves and abuts against the limiting ball, so that the limiting ball is immersed in the limiting groove, thereby completing the limiting of the carbon dioxide gas pipe and the nitrogen gas pipe, that is, completing the connection between the intake pipe and the carbon dioxide gas pipe and the nitrogen gas pipe. The connection operation of the carbon dioxide gas pipe and the nitrogen gas pipe is simple and convenient, and the sealing rubber ring abuts against the inner wall of the intake pipe to ensure the sealing effect and ensure good sealing performance. The installation and disassembly of the carbon dioxide gas pipe and the nitrogen gas pipe are simple and convenient, which is convenient for introducing carbon dioxide and nitrogen into the mixing tank.

[0013] 2. The mixed raw materials are introduced into the mixing tank through the feeding cover, and the driving motor is controlled by the controller. The power output end of the driving motor rotates to drive the transmission rod, and the rotation of the transmission rod drives the spiral blades and the support rod to rotate. The rotation of the support rod drives the scraper to rotate. The rotation of the scraper scrapes the inner wall of the mixing tank, thereby removing the attached foaming agent on the inner wall of the mixing tank, which is convenient for the discharge of the foaming agent. The rotation of the scraper and the spiral blade destroys the symmetry of the foaming agent circulation loop, increases resistance, prevents the occurrence of circular motion, and increases turbulent motion, thereby improving the mixing efficiency of the raw materials, making the stirring more sufficient and the mixing efficiency high. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0015] Figure 2 This is a schematic diagram of the internal structure of the mixing tank of the utility model.

[0016] Figure 3 It is a schematic diagram of the structure of the connecting mechanism of the utility model.

[0017] Figure 4 It is a cross-sectional view of the fixing part, air intake pipe, carbon dioxide air pipe and nitrogen air pipe of the utility model.

[0018] In the figure: 1. mixing tank; 2. supporting legs; 3. controller; 4. top cover; 5. charging cover; 6. pressure relief valve; 7. air inlet pipe; 8. flow control valve; 9. fixing parts; 10. carbon dioxide gas pipe; 11. nitrogen gas pipe; 12. discharge pipe; 13. stop valve; 14. transmission rod; 15. spiral blade; 16. support rod; 17. scraper; 18. driving motor; 19. pressing block; 20. reset spring; 21. ball groove; 22. limit ball; 23. limit groove; 24. ring groove; 25. sealing rubber ring. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] The utility model provides Figure 1-4A mixing device for a CO2 and N2 mixed foaming agent shown in the figure comprises a mixing tank 1, a leg 2 is fixedly connected to the lower surface of the mixing tank 1, a top cover 4 is arranged on the top of the mixing tank 1, a pressure relief valve 6 is arranged on the surface of the top cover 4, two groups of air inlet pipes 7 are also fixedly connected to the surface of the top cover 4, a flow control valve 8 is arranged on the surface of the air inlet pipe 7, a fixing part 9 is slidably connected to the air inlet end of the air inlet pipe 7, a connecting mechanism is arranged inside the fixing part 9, the two groups of air inlet pipes 7 are respectively connected to a carbon dioxide air pipe 10 and a nitrogen air pipe 11 through the connecting mechanism inside the fixing part 9, and a stirring mechanism is arranged inside the mixing tank 1.

[0021] In this embodiment, the connecting mechanism includes a pressure block 19, a return spring 20, a ball groove 21 and a limiting ball 22. The inlet end of the intake pipe 7 is slidably connected with a fixing piece 9, and the inner side wall of the fixing piece 9 is fixedly connected with the pressure block 19. A spring cavity is formed between the pressure block 19 and the connecting pipe, and the inner side wall of the spring cavity is provided with a return spring 20. One end of the intake pipe 7 is provided with evenly arranged ball grooves 21, and the inner side wall of the ball groove 21 is placed with a limiting ball 22. One end of the carbon dioxide gas pipe 10 and the nitrogen gas pipe 11 are provided with a limiting groove 23 and an annular groove 24, and the limiting groove 23 fits with the limiting ball 22. The inner side wall of the annular groove 24 is fixedly connected with a sealing rubber ring 25, and the carbon dioxide gas pipe 10 and the nitrogen gas pipe 11 can be inserted into the intake pipe 7; when connecting the carbon dioxide gas pipe 10 and the nitrogen gas pipe 11, the fixing piece 9 can be first moved, and the movement of the fixing piece 9 drives the pressure block 19 to move, and the pressure block 19 The compressed return spring 20 is moved so that the return spring 20 is in a compressed state, and then the carbon dioxide air pipe 10 and the nitrogen air pipe 11 are directly pressed, and the fixing part 9 is loosened. After the return spring 20 loses pressure, it returns to its initial state, and one end of the return spring 20 moves to drive the pressure block 19 to move, and the pressure block 19 moves to abut against the limiting ball 22, so that the limiting ball 22 is immersed in the limiting groove 23, thereby completing the limiting of the carbon dioxide air pipe 10 and the nitrogen air pipe 11, that is, completing the connection between the air intake pipe 7 and the carbon dioxide air pipe 10 and the nitrogen air pipe 11. The connection operation of the carbon dioxide air pipe 10 and the nitrogen air pipe 11 is simple and convenient, and the sealing rubber ring 25 abuts against the inner wall of the air intake pipe 7 to ensure the sealing effect and ensure good sealing performance. The installation and disassembly operation of the carbon dioxide air pipe 10 and the nitrogen air pipe 11 is simple and convenient, which is convenient for introducing carbon dioxide and nitrogen into the mixing tank 1.

[0022] In this embodiment, the stirring mechanism includes a transmission rod 14, a spiral blade 15, a support rod 16, a scraper 17 and a drive motor 18. The inner wall of the mixing tank 1 is rotatably connected to the transmission rod 14, and the surface of the transmission rod 14 is fixedly connected to the spiral blade 15, and the spiral blade 15 is shuttle-shaped. The surface of the transmission rod 14 is also fixedly connected to the support rod 16, and one end of the support rod 16 is fixedly connected to the scraper 17, and the scraper 17 is inclined and the scraping surface of the scraper 17 abuts against the inner wall of the tank body. The upper surface of the top cover 4 is fixedly connected to the drive motor 18, and the power output end of the drive motor 18 is fixedly connected to one end of the transmission rod 14. The surface of the top cover 4 is fixedly connected to the feeding cover 5, and the lower surface of the mixing tank 1 is fixedly connected to the discharge pipe 12. The discharge pipe 1 A stop valve 13 is provided at the outlet end; the mixed raw material is introduced into the mixing tank 1 through the feeding cover 5, and the driving motor 18 is controlled by the controller 3 to operate. The power output end of the driving motor 18 rotates to drive the transmission rod 14 to rotate, and the transmission rod 14 rotates to drive the spiral blade 15 and the support rod 16 to rotate, and the support rod 16 rotates to drive the scraper 17 to rotate. The scraper 17 rotates to scrape the inner wall of the mixing tank 1, thereby removing the attached foaming agent on the inner wall of the mixing tank 1, which is convenient for the discharge of the foaming agent. The rotation of the scraper 17 and the spiral blade 15 destroys the symmetry of the foaming agent circulation loop, increases resistance, prevents the occurrence of circular motion, and increases turbulent motion, thereby improving the mixing efficiency of the raw materials, making the stirring more sufficient and the mixing efficiency high.

[0023] In this embodiment, a controller 3 is fixedly connected to the side wall of the mixing tank 1, and the drive motor 18 and the flow control valve 8 are electrically connected to an external power supply through the controller 3; the operation of the drive motor 18 and the flow control valve 8 can be controlled by the controller 3, and the control operation is simple and convenient, and easy to use.

[0024] Working principle of the utility model: the utility model is a mixing device for mixing CO2 and N2 mixed foaming agents. The mixed raw materials are introduced into the mixing tank 1 through the feeding cover 5, and the driving motor 18 is controlled by the controller 3 to operate. The power output end of the driving motor 18 rotates to drive the transmission rod 14 to rotate, and the transmission rod 14 rotates to drive the spiral blade 15 and the support rod 16 to rotate. The support rod 16 rotates to drive the scraper 17 to rotate. The scraper 17 rotates to scrape the inner wall of the mixing tank 1, thereby removing the attached foaming agent on the inner wall of the mixing tank 1, which is convenient for the discharge of the foaming agent. The rotation of the scraper 17 and the spiral blade 15 destroys the symmetry of the foaming agent circulation loop, increases resistance, prevents the occurrence of circular motion, and increases turbulent motion, thereby improving the mixing efficiency of the raw materials. When connecting the carbon dioxide gas pipe 10 and the nitrogen gas pipe 11, the fixing piece 9 can be first toggled to fix The movement of the component 9 drives the pressing block 19 to move, and the pressing block 19 moves to compress the return spring 20, so that the return spring 20 is in a compressed state, and then the carbon dioxide air pipe 10 and the nitrogen air pipe 11 are directly connected, and the fixing component 9 is loosened. The return spring 20 recovers to the initial state after losing pressure, and one end of the return spring 20 moves to drive the pressing block 19 to move, and the pressing block 19 moves to abut against the limiting ball 22, so that the limiting ball 22 is immersed in the limiting groove 23, thereby completing the limiting of the carbon dioxide air pipe 10 and the nitrogen air pipe 11, that is, completing the connection between the intake pipe 7 and the carbon dioxide air pipe 10 and the nitrogen air pipe 11. The connection operation of the carbon dioxide air pipe 10 and the nitrogen air pipe 11 is simple and convenient, and the sealing rubber ring 25 abuts against the inner wall of the intake pipe 7 to ensure the sealing effect, ensure good sealing performance, and facilitate the connection of the carbon dioxide air pipe 10 and the nitrogen air pipe 11.

[0025] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A mixing device for mixing CO2 and N2 foaming agents, characterized in that: The mixing tank (1) comprises a mixing tank (1), wherein a support leg (2) is fixedly connected to the lower surface of the mixing tank (1), a top cover (4) is arranged at the top of the mixing tank (1), a pressure relief valve (6) is arranged on the surface of the top cover (4), two groups of air intake pipes (7) are fixedly connected to the surface of the top cover (4), a flow control valve (8) is arranged on the surface of the air intake pipe (7), a fixing member (9) is slidably connected to the air intake end of the air intake pipe (7), a connecting mechanism is arranged inside the fixing member (9), the two groups of air intake pipes (7) are respectively connected to a carbon dioxide air pipe (10) and a nitrogen air pipe (11) through the connecting mechanism inside the fixing member (9), and a stirring mechanism is arranged inside the mixing tank (1).

2. A mixing device for mixing CO2 and N2 mixed foaming agents according to claim 1, characterized in that: The connection mechanism comprises a pressure block (19), a return spring (20), a ball groove (21) and a limiting ball (22); the inlet end of the air intake pipe (7) is slidably connected to a fixing piece (9); the inner wall of the fixing piece (9) is fixedly connected to the pressure block (19); a spring cavity is formed between the pressure block (19) and the connecting pipe; the inner wall of the spring cavity is provided with a return spring (20); one end of the air intake pipe (7) is provided with evenly arranged ball grooves (21); and the inner wall of the ball groove (21) is provided with a limiting ball (22).

3. A mixing device for mixing CO2 and N2 mixed foaming agents according to claim 1, characterized in that: The carbon dioxide gas pipe (10) and the nitrogen gas pipe (11) are provided with a limiting groove (23) and an annular groove (24) at one end, the limiting groove (23) is matched with the limiting ball (22), and a sealing rubber ring (25) is fixedly connected to the inner wall of the annular groove (24), so that the carbon dioxide gas pipe (10) and the nitrogen gas pipe (11) can be inserted into the air intake pipe (7).

4. A mixing device for mixing CO2 and N2 mixed foaming agents according to claim 1, characterized in that: The stirring mechanism comprises a transmission rod (14), a spiral blade (15), a support rod (16), a scraper (17) and a driving motor (18); the inner side wall of the mixing tank (1) is rotatably connected to the transmission rod (14); the surface of the transmission rod (14) is fixedly connected to the spiral blade (15), and the spiral blade (15) is arranged in a shuttle shape; the surface of the transmission rod (14) is also fixedly connected to the support rod (16); one end of the support rod (16) is fixedly connected to the scraper (17); the scraper (17) is arranged obliquely, and the scraping surface of the scraper (17) abuts against the inner wall of the tank body.

5. The mixing device of a CO2 and N2 mixed foaming agent according to claim 1, characterized in that: A driving motor (18) is fixedly connected to the upper surface of the top cover (4), and a power output end of the driving motor (18) is fixedly connected to one end of the transmission rod (14).

6. A mixing device for mixing CO2 and N2 mixed foaming agents according to claim 1, characterized in that: The surface of the top cover (4) is fixedly connected to a feeding cover (5), the lower surface of the mixing tank (1) is fixedly connected to a discharge pipe (12), and a stop valve (13) is provided at the outlet end of the discharge pipe (12).

7. A mixing device for mixing CO2 and N2 mixed foaming agents according to claim 5, characterized in that: A controller (3) is fixedly connected to the side wall of the mixing tank (1), and the drive motor (18) and the flow control valve (8) are electrically connected to an external power source via the controller (3).

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