Mixing device for preparing foaming agent

Abstract

The mixing device comprises a mixing box, the upper end of the mixing box is provided with an opening, a sealing cover plate is installed at the opening, an inner cavity of the mixing box is in an inverted cone shape, one-way valves are arranged in an air inlet pipe and an air outlet pipe, pistons are slidably connected in two sets of air outlet cavities, and the two sets of air outlet cavities are communicated with the mixing box. Driving mechanisms for driving the pistons to move are mounted in the two groups of exhaust cavities, and a discharge pipe is mounted at the lower end of the mixing box. By means of the exhaust box, the gas inlet pipe, the exhaust pipe, the one-way valve and other components, gas generated in the mixing box can be exhausted in time by means of movement of the two sets of pistons, accumulation of the gas in the device is avoided, and material fluidity change and mixing rod operation interference caused by pressure change in the mixing box are prevented; the mixing effect of foaming agent raw materials is effectively ensured, and uniform dispersion is realized.

Description

Technical Field

[0001] This utility model relates to the field of foaming agent mixing technology, and in particular to a mixing device for preparing foaming agents. Background Technology

[0002] In modern industrial production, foaming agents are widely used in construction, packaging, automobile manufacturing, and many other fields, and their performance directly affects the quality of the final product. In the preparation of foaming agents, the mixing process is one of the key steps to ensure the quality of the foaming agent.

[0003] Most existing foaming agent mixing devices focus on the raw material stirring function and do not pay enough attention to the problem of gas discharge during the mixing process. If these gases cannot be discharged in time, they will accumulate inside the device and form a large pressure. The internal pressure of the mixing tank changes the physical conditions of the mixing environment, causing changes in the material flowability, interfering with the normal operation of the stirring blades, and greatly reducing the mixing effect, making it difficult to achieve uniform dispersion of raw materials. Therefore, it is necessary to propose a mixing device for foaming agent preparation to address the above problems. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a mixing device for preparing foaming agents.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A mixing device for preparing a foaming agent includes a mixing chamber with an open top and a sealing cover. The inner cavity of the mixing chamber is inverted conical. A rotating rod is rotatably connected to the lower end of the sealing cover. Multiple mixing rods are distributed circumferentially on the outer wall of the rotating rod. An exhaust box is fixedly connected to the side wall of the mixing chamber. The exhaust box contains two exhaust chambers. Two sets of air inlet pipes and exhaust pipes are installed on the outer wall of the exhaust box. One end of each set of air inlet pipes is connected to one of the two sets of exhaust chambers. Both sets of exhaust pipes are connected to the interior of the mixing chamber. A one-way valve is installed in each of the air inlet pipes and exhaust pipes. A piston is slidably connected in each of the two sets of exhaust chambers. A drive mechanism for driving the piston is installed in each of the two sets of exhaust chambers. A discharge pipe is installed at the lower end of the mixing chamber.

[0007] Preferably, the drive mechanism includes reciprocating lead screws rotatably connected to two sets of exhaust chambers respectively. Each reciprocating lead screw has a lead screw sleeve threadedly connected to its threaded section. Each lead screw sleeve is fixedly connected to its adjacent piston via a connecting rod. The two sets of pistons slide in opposite directions.

[0008] Preferably, a limit rod is fixedly connected to the top of each of the two sets of exhaust chambers, the lead screw sleeve is slidably connected to the outer wall of the limit rod, and a limit block is fixedly connected to the end of each lead screw sleeve. The radius of the limit block is larger than the radius of the reciprocating lead screw.

[0009] Preferably, the upper end of the exhaust box is rotatably connected to two sets of gears, the two sets of gears mesh with each other and are respectively coaxially fixedly connected to two sets of reciprocating lead screws, and the upper end of the sealing cover is fixedly connected to a fixing plate.

[0010] Preferably, the upper ends of the sealing cover and the exhaust box are respectively rotatably connected to a second transmission wheel and a first transmission wheel. The second transmission wheel is connected to the first transmission wheel via a transmission belt. The second transmission wheel and the first transmission wheel are respectively coaxially and fixedly connected to the rotating rod and its adjacent gear.

[0011] Preferably, a servo motor is fixedly connected to the upper end of the fixed plate, the end of the output shaft of the servo motor is fixedly connected to the transmission wheel two on the same axis, and a bracket is provided at the bottom of the mixing box.

[0012] This utility model has the following beneficial effects:

[0013] 1. This utility model, through components such as an exhaust box, an air inlet pipe, an exhaust pipe, and a one-way valve, and with the help of the movement of two sets of pistons, can promptly discharge the gas generated in the mixing box, avoid the accumulation of gas inside the device, prevent changes in material flowability and interference with the operation of the mixing rod due to pressure changes in the mixing box, effectively ensure the mixing effect of the foaming agent raw materials, and achieve uniform dispersion.

[0014] 2. This utility model uses components such as transmission wheel one, transmission wheel two, and transmission belt to enable the mixing and venting functions to share a single power source, the servo motor. This not only simplifies the device structure and reduces the device cost, but also ensures that the mixing and venting actions are carried out synchronously, continuously venting gas during the material mixing process. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a mixing device for preparing a foaming agent according to the present invention;

[0016] Figure 2 for Figure 1 Schematic diagram of cross-section structure.

[0017] Figure 3 for Figure 1 Schematic diagram of the cross-sectional structure of the central exhaust box.

[0018] In the diagram: 1. Mixing box; 2. Sealing cover; 3. Feed pipe; 4. Servo motor; 5. Bracket; 6. Discharge pipe; 7. Exhaust box; 8. Transmission wheel one; 9. Transmission belt; 10. Fixing plate; 11. Transmission wheel two; 12. Rotating rod; 13. Mixing rod; 14. Exhaust chamber; 15. Gear; 16. Inlet pipe; 17. Exhaust pipe; 18. Reciprocating screw; 19. Screw sleeve; 20. Piston; 21. Limiting rod; 22. Limiting block. 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 1-3 A mixing device for preparing a foaming agent includes a mixing chamber 1 with an open top and a sealing cover 2 installed at the open top. The inner cavity of the mixing chamber 1 is inverted conical. A rotating rod 12 is rotatably connected to the lower end of the sealing cover 2. Multiple mixing rods 13 are distributed around the outer wall of the rotating rod 12. An exhaust box 7 is fixedly connected to the side wall of the mixing chamber 1. Two exhaust chambers 14 are provided inside the exhaust box 7. Two sets of air inlet pipes 16 and exhaust pipes 17 are installed on the outer wall of the exhaust box 7. One end of each set of air inlet pipes 16 is connected to the two sets of exhaust chambers 14. Both sets of exhaust pipes 17 are connected to the inside of the mixing chamber 1. One-way valves are provided in both the air inlet pipes 16 and the exhaust pipes 17. A piston 20 is slidably connected in each set of exhaust chambers 14. A drive mechanism for driving the piston 20 is installed in each set of exhaust chambers 14. A discharge pipe 6 is installed at the lower end of the mixing chamber 1.

[0021] Furthermore, the inverted conical design of the mixing chamber 1 facilitates the concentration of materials at the bottom during the mixing process. Combined with the stirring action of the mixing rod 13, this results in more thorough mixing. The exhaust chamber 7, air inlet pipe 16, exhaust pipe 17, and one-way valve form a complete exhaust channel. The drive mechanism moves the piston 20, which can promptly discharge the gas generated in the mixing chamber 1, preventing gas accumulation inside the device and avoiding changes in material flowability and interference with the operation of the mixing rod 13 due to internal pressure variations. This effectively ensures the mixing effect and achieves uniform dispersion of raw materials.

[0022] The drive mechanism includes reciprocating screws 18 that are rotatably connected to two sets of exhaust chambers 14 respectively. Each reciprocating screw 18 has a screw sleeve 19 threadedly connected to its threaded section. Each screw sleeve 19 is fixedly connected to its adjacent piston 20 through a connecting rod. The two sets of pistons 20 slide in opposite directions.

[0023] Furthermore, through the cooperation of the reciprocating screw 18 and the screw sleeve 19, the rotational motion of the reciprocating screw 18 can be stably converted into the linear reciprocating motion of the piston 20. Moreover, the two sets of pistons 20 slide in opposite directions, and can alternately perform intake and exhaust actions, making the exhaust process more efficient and continuous. Compared with single piston exhaust, it can expel the gas accumulated in the mixing box 1 more quickly and continuously maintain a stable pressure environment in the mixing box 1.

[0024] Limiting rods 21 are fixedly connected to the top of both sets of exhaust chambers 14. Screw sleeves 19 are slidably connected to the outer wall of the limiting rods 21. Limiting blocks 22 are fixedly connected to the ends of the screw sleeves 19. The radius of the limiting blocks 22 is larger than the radius of the reciprocating screws 18. Two sets of gears 15 are rotatably connected to the upper end of the exhaust box 7. The two sets of gears 15 mesh with each other and are coaxially fixedly connected to the two sets of reciprocating screws 18 respectively. A fixing plate 10 is fixedly connected to the upper end of the sealing cover plate 2.

[0025] Furthermore, the meshing gears 15 can transmit power and change direction, stably transmitting power to the two sets of reciprocating screws 18, enabling the two sets of reciprocating screws 18 to rotate synchronously and in opposite directions, thereby driving the two sets of pistons 20 to move in a predetermined direction, ensuring the coordination and stability of the exhaust process.

[0026] The upper ends of the sealing cover plate 2 and the exhaust box 7 are respectively rotatably connected to the transmission wheel 11 and the transmission wheel 8. The transmission wheel 11 is connected to the transmission wheel 8 through the transmission belt 9. The transmission wheel 11 and the transmission wheel 8 are respectively coaxially and fixedly connected to the rotating rod 12 and its adjacent gear 15.

[0027] Furthermore, the arrangement of transmission wheel 8, transmission wheel 11 and transmission belt 9 enables indirect power transmission, transferring the rotational power of rotating rod 12 to gear 15, allowing the mixing and venting functions to share a single power source, thus simplifying the device structure.

[0028] A servo motor 4 is fixedly connected to the upper end of the fixed plate 10. The output shaft end of the servo motor 4 is coaxially fixedly connected to the transmission wheel 11. A bracket 5 is provided at the bottom of the mixing box 1.

[0029] In this utility model, when the device is used, the foaming agent raw material is poured into the mixing box 1 through the feed pipe 3, and then the servo motor 4 is started. The output shaft of the servo motor 4 drives the transmission wheel 11 to rotate. Since the transmission wheel 11 is connected to the transmission wheel 8 through the transmission belt 9, the rotating rod 12 and the gear 15 rotate synchronously.

[0030] When the rotating rod 12 rotates, the mixing rod 13 on its outer wall begins to stir the material in the mixing box 1. Since the inner cavity of the mixing box 1 is inverted conical, the material concentrates towards the bottom during the stirring process, making the mixing more thorough. At the same time, the meshing gears 15 transmit power to the two sets of reciprocating screws 18, causing them to rotate synchronously and in opposite directions.

[0031] When the reciprocating screw 18 rotates, the screw sleeve 19, which is threaded to it, moves linearly along the limit rod 21 under the guidance and limitation of the limit rod 21. The screw sleeve 19 drives the piston 20 to slide in the exhaust chamber 14 through the connecting rod, and the two sets of pistons 20 slide in opposite directions. When one set of pistons 20 slides away from the intake pipe 16, the gas in the mixing box 1 enters the exhaust chamber 14 through the intake pipe 16; the other set of pistons 20 slides towards the exhaust pipe 17, and the gas in the exhaust chamber 14 is discharged through the exhaust pipe 17. The two sets of pistons 20 alternately perform intake and exhaust actions to promptly discharge the gas generated in the mixing box 1.

[0032] The one-way valves in the air inlet pipe 16 and the exhaust pipe 17 ensure that the gas can only flow in one direction, avoid gas backflow, ensure that the exhaust process is carried out effectively, and prevent the gas accumulation in the mixing box 1 from causing pressure changes that interfere with the mixing process. After the mixing is completed, the servo motor 4 is turned off and the solenoid valve at the discharge pipe 6 is opened, and the uniformly mixed foaming agent can be taken out from the mixing box 1.

[0033] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A mixing device for the preparation of a blowing agent, comprising a mixing tank (1), characterized in that, The mixing box (1) has an open top and a sealing cover (2) is installed at the open top. The inner cavity of the mixing box (1) is inverted conical. A rotating rod (12) is rotatably connected to the lower end of the sealing cover (2). Multiple mixing rods (13) are distributed around the outer wall of the rotating rod (12). An exhaust box (7) is fixedly connected to the side wall of the mixing box (1). Two exhaust chambers (14) are provided inside the exhaust box (7). Two sets of air inlet pipes (16) and exhaust pipes are installed on the outer wall of the exhaust box (7). The air pipe (17) and the two sets of air inlet pipes (16) are respectively connected to the two sets of exhaust chambers (14). The two sets of exhaust pipes (17) are connected to the inside of the mixing box (1). The air inlet pipe (16) and the exhaust pipe (17) are each equipped with a one-way valve. The two sets of exhaust chambers (14) are each slidably connected with a piston (20). The two sets of exhaust chambers (14) are each equipped with a drive mechanism to drive the piston (20) to move. The lower end of the mixing box (1) is equipped with a discharge pipe (6).

2. A mixing device for the preparation of a blowing agent according to claim 1, characterized in that The drive mechanism includes reciprocating screws (18) that are rotatably connected to two sets of exhaust chambers (14). Each reciprocating screw (18) has a screw sleeve (19) threadedly connected to its threaded section. Each screw sleeve (19) is fixedly connected to its adjacent piston (20) via a connecting rod. The two sets of pistons (20) slide in opposite directions.

3. A mixing device for the preparation of a blowing agent according to claim 2, characterized in that Both sets of exhaust chambers (14) are fixedly connected to the top of the limit rod (21), the lead screw sleeve (19) is slidably connected to the outer wall of the limit rod (21), and the end of the lead screw sleeve (19) is fixedly connected to the limit block (22). The radius of the limit block (22) is larger than the radius of the reciprocating lead screw (18).

4. A mixing device for the preparation of a blowing agent according to claim 3, characterized in that The upper end of the exhaust box (7) is rotatably connected to two sets of gears (15), the two sets of gears (15) mesh with each other and are respectively coaxially fixedly connected to two sets of reciprocating screws (18), and the upper end of the sealing cover (2) is fixedly connected to a fixing plate (10).

5. A mixing device for the preparation of a blowing agent according to claim 4, characterized in that The upper ends of the sealing cover (2) and the exhaust box (7) are respectively rotatably connected to the transmission wheel two (11) and the transmission wheel one (8). The transmission wheel two (11) is connected to the transmission wheel one (8) through the transmission belt (9). The transmission wheel two (11) and the transmission wheel one (8) are respectively coaxially fixedly connected to the rotating rod (12) and its adjacent gear (15).

6. A mixing device for the preparation of a blowing agent according to claim 5, characterized in that A servo motor (4) is fixedly connected to the upper end of the fixed plate (10). The output shaft end of the servo motor (4) is coaxially fixedly connected to the transmission wheel (11). A bracket (5) is provided at the bottom of the mixing box (1).

Images