Modified polyether polyol production device

Abstract

The utility model relates to a modified polyether polyol production device, which comprises a tank body and a stirring mechanism, a liquid inlet is arranged on the tank body, the stirring mechanism comprises a motor fixedly arranged on the tank body, an output shaft of the motor penetrates through the top of the tank body and is fixedly connected with a stirring shaft, and the stirring shaft is fixedly connected with the tank body. A plurality of stirring blades are fixedly arranged on the stirring shaft, a vacuum pump is arranged on one side of the tank body, a pressure gauge is arranged on the tank body, a defoaming mechanism is arranged on the stirring shaft, a liquid level observation meter is arranged on one side of the tank body, gas in the tank body forms negative pressure through the vacuum pump, and the defoaming mechanism is driven to rotate through the stirring shaft. The defoaming mechanism is arranged on the stirring shaft, foam at the vortex position is defoamed, the influence on the quality of polyhydric alcohol is prevented, and the defoaming mechanism and the stirring blades do not rotate synchronously by arranging the tension spring on the stirring shaft to be connected with the defoaming mechanism.

Description

Technical Field

[0001] This utility model relates to the technical field of polyether polyol production equipment, and in particular to a modified polyether polyol production equipment. Background Technology

[0002] Modified polyether polyols generally refer to mixtures containing polyether polyols with different structures and / or containing multiple components such as hydroxyl silicone oil, crosslinking agents, and catalysts. During the production process, different speed combinations and / or long-term stirring and mixing are usually required to ensure that the various components are fully mixed. However, this long-term stirring and mixing often leads to the generation of bubbles. These bubbles not only affect the appearance of the product but may also significantly reduce the overall quality of the combined polyether polyols. The presence of bubbles can lead to unstable performance of the final product during use, such as fluctuations in physical and chemical properties, affecting its performance in different application fields.

[0003] Existing polyol production equipment typically includes a vacuum pump to extract air from the mixing tank, creating a negative pressure inside the tank that causes bubbles to burst. For example, Chinese Patent Publication No. CN213492149U discloses a "defoaming device for the production of combined polyether polyols," which uses a vacuum pump to create a negative pressure inside the tank, which can be observed using a pressure gauge. This creates a pressure difference between the inside and outside of the bubbles, facilitating their bursting. An electric telescopic rod extends and retracts, moving an annular block along two sliding grooves, which in turn moves the defoaming column up and down to further defoam the sidewalls, thus eliminating bubbles completely and improving production efficiency without affecting the quality of the polyol.

[0004] However, in actual production processes, the efficiency of eliminating bubbles solely through vacuum is often too low. In particular, during stirring, a vortex-like depression forms around the stirring shaft, which generates and accumulates foam, along with a small number of residual bubbles on the liquid surface. Existing production equipment cannot effectively handle these issues, thus affecting the quality of the modified polyether polyol product. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies, such as the vortex-shaped depressions formed near the stirring shaft and the residual and / or accumulated foam at the liquid surface during the stirring of raw materials, which affect the quality of polyols. This invention proposes a modified polyether polyol production device to eliminate and improve the foam problem.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] This utility model proposes a modified polyether polyol production device, including a tank and a stirring mechanism. The tank is provided with a liquid inlet. The stirring mechanism includes a motor fixedly mounted on the tank. The output shaft of the motor passes through the tank and is fixedly connected to a stirring shaft. Multiple stirring blades are fixedly mounted on the stirring shaft. A vacuum pump is provided on one side of the tank. The output end of the vacuum pump is connected to the tank through a gas guide pipe. A pressure gauge is provided on the tank. A defoaming mechanism is provided on the stirring shaft. A liquid level observation gauge is provided on one side of the tank.

[0008] Furthermore, the defoaming mechanism includes a defoaming component, which is provided with a plurality of defoaming needles. The defoaming component is sleeved on the stirring shaft through a connector, and there is an installation gap between the connector and the stirring shaft.

[0009] Furthermore, the connector is a sleeve, and a positioning component is provided on the stirring shaft, forming an installation position at the positioning component. The sleeve is installed at the installation position to install the connector on the stirring shaft.

[0010] Furthermore, the positioning component includes a first positioning element and a second positioning element, forming the mounting position between the first positioning element and the second positioning element.

[0011] Furthermore, the defoaming component has a linear, arc-shaped, or Z-shaped structure.

[0012] Furthermore, an angle α is formed between the defoaming component and the stirring shaft, and the angle α is greater than 0 degrees and less than or equal to 90 degrees.

[0013] Furthermore, it also includes a pin shaft, through which the defoaming component is connected to the connecting component to adjust the angle between the defoaming component and the stirring shaft.

[0014] Furthermore, it also includes a damper, one end of which is connected to the stirring shaft, and the other end of which is connected to the defoaming component.

[0015] The modified polyether polyol production apparatus proposed in this utility model has the following advantages:

[0016] In this invention, a vacuum pump is used to create negative pressure inside the tank, which can extract most of the bubbles. The magnitude of the negative pressure can be observed by a pressure gauge. In addition, by setting a tension spring or a retractable damping connecting rod on the stirring shaft and connecting it to the defoaming mechanism to form a damping structure, the defoaming mechanism and the stirring blade rotate asynchronously. When the bubbles generated by stirring pass through the defoaming needle, they are broken, which can improve the defoaming efficiency.

[0017] Secondly, in this invention, by setting defoaming components at different angles to the connecting parts, bubbles at different locations such as the liquid surface and vortex can be punctured, thereby further improving the defoaming effect and the adaptability of the device. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a modified polyether polyol production device proposed in this utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the stirring shaft of this utility model;

[0020] Figure 3 This is a schematic diagram of the positioning component of this utility model;

[0021] Figure 4 This is a schematic diagram of the tension spring of this utility model.

[0022] Figure 5 This is a structural schematic diagram of the connector of this utility model.

[0023] In the diagram: 1. Tank body; 11. Liquid inlet; 12. Pressure gauge; 13. Liquid level gauge; 2. Stirring mechanism; 21. Motor; 22. Stirring shaft; 23. Stirring blade; 3. Vacuum pump; 4. Defoaming mechanism; 41. Defoaming component; 42. Defoaming needle; 43. Connecting component; 44. Positioning assembly; 46. Tension spring. Detailed Implementation

[0024] 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.

[0025] Example 1:

[0026] Reference Figure 1-5 A modified polyether polyol production apparatus includes a tank 1 and a stirring mechanism 2. The tank 1 is provided with a liquid inlet 11. The stirring mechanism 2 includes a motor 21 fixedly mounted on the tank 1. The output shaft of the motor 21 passes through the top of the tank 1 and is fixedly connected to a stirring shaft 22. Multiple stirring blades 23 are fixedly mounted on the stirring shaft 22. A vacuum pump 3 is provided on one side of the tank 1. The output end of the vacuum pump 3 is connected to the tank 1 through a gas guide pipe. A pressure gauge 12 is provided on the tank 1. A defoaming mechanism 4 is provided on the stirring shaft 22. A liquid level observation gauge 13 is provided on one side of the tank 1.

[0027] In this invention, a vacuum pump 3 creates a negative pressure inside the tank 1, which is observed by a pressure gauge 12. The defoaming mechanism 4 uses a defoaming needle to break the foam passing through the defoaming needle for defoaming treatment, preventing it from affecting the quality of the polyol. A liquid level observation gauge 13 is set up to facilitate the observation of the total amount of added raw materials.

[0028] Furthermore, in this embodiment, the defoaming mechanism 4 includes a defoaming component 41, which is provided with a plurality of defoaming needles 42. The defoaming component 41 is sleeved on the stirring shaft 22 via a connector 43, and there is an installation gap between the connector and the stirring shaft. This prevents the defoaming component from rotating synchronously with the stirring shaft.

[0029] In this embodiment, the connector 43 is a sleeve.

[0030] In this embodiment, a positioning component 44 is provided on the stirring shaft 22, forming an installation position at the positioning component, and the sleeve is installed at the installation position to install the connector 43 on the stirring shaft.

[0031] The positioning component is fixedly connected to the stirring shaft, and there is no fixed connection between the positioning component and the connecting piece.

[0032] In this embodiment, the positioning component 44 includes a first positioning element and a second positioning element, and the mounting position is formed between the first positioning element and the second positioning element.

[0033] In some embodiments, the first positioning member is a first positioning ring, which is arranged around and fixed to the stirring shaft; the second positioning member is a second positioning ring, which is arranged around and fixed to the stirring shaft. A mounting groove, i.e., the mounting position, is formed between the first positioning ring and the second positioning ring.

[0034] In this embodiment, the first positioning member is above the second positioning member, and the connecting member is between the first and second positioning members. The upper end of the connecting member cooperates with the first positioning member to restrict the upward movement of the connecting member; the lower end of the connecting member cooperates with the second positioning member to restrict the downward movement of the connecting member. The position of the connecting member at the stirring shaft is determined by the positioning component, thereby allowing the defoaming mechanism to adapt to production scenarios with different material addition amounts.

[0035] In this embodiment, the defoaming component 41 has a straight, arc-shaped, or Z-shaped structure. Different defoaming components can be used depending on the situation. Furthermore, the defoaming component 41 can be cylindrical or a thin strip.

[0036] The defoaming component 41 is connected to the stirring shaft 22 via the connector 43. The stirring shaft 22 and the rotating material drive the defoaming component 41 to move, so that the defoaming component 41 and the defoaming needle 42 can defoam the foam at different positions such as the liquid surface and vortex.

[0037] An angle α is formed between the defoaming component (41) and the stirring shaft (22), and the angle α is greater than 0 degrees and less than or equal to 90 degrees.

[0038] In some implementations, the included angle α between the defoaming component (41) and the stirring shaft (22) is 30 degrees.

[0039] When the included angle is less than 90 degrees and greater than 0 degrees, a V-shaped structure is formed between the defoaming component 41 and the connecting component 43. When the included angle is equal to 90 degrees, a right-angle structure is formed between the defoaming component 41 and the connecting component 43. Different numbers of defoaming mechanisms 4 can be arranged on the stirring shaft 22 according to the liquid level and the size of the vortex generated by stirring, so as to achieve a better defoaming effect.

[0040] It also includes a pin 50, through which the defoaming component 41 is connected to the connecting component to adjust the angle between the defoaming component and the stirring shaft 22. The pin 50 connection makes the angle of the defoaming component adjustable.

[0041] The defoaming component is connected to the connecting component via a pin, which can change the angle between the defoaming component and the connecting component. Since the connecting component is sleeved on the stirring shaft, changing the angle between the defoaming component and the connecting component changes the angle between the defoaming component and the stirring shaft.

[0042] It also includes a damper, one end of which is connected to the stirring shaft and the other end of which is connected to the defoaming component (41).

[0043] In this embodiment, the damper is a tension spring 46. One end of the tension spring 46 is connected to the stirring shaft, and the other end of the damper (46) is connected to the defoaming component (41) to form a damping structure, so that the defoaming mechanism 4 and the stirring blade 23 rotate asynchronously. When the bubbles generated by stirring pass through the defoaming needle 42, they are broken, thereby achieving the purpose of defoaming.

[0044] Working principle: During operation, the vacuum pump 3 creates a negative pressure inside the tank 1, which is observed by the pressure gauge 12. Under the action of the tension spring, the defoaming component 41 and the stirring shaft are displaced asynchronously, allowing the defoaming needle 42 to defoam at different positions such as the liquid surface and vortex. The defoaming mechanism and the material rotate asynchronously at the moment of stirring start and during rotation. Even after stirring stops, due to the damping effect of the tension spring 46, the defoaming mechanism will still make relative displacement movements with the material, further increasing the chance of bubbles being broken when passing the position of the defoaming needle 42, thereby achieving the purpose of defoaming.

[0045] Example 2:

[0046] In this embodiment, the positioning component further includes a first positioning element, a second positioning element, and a third positioning element, which are arranged sequentially from top to bottom on the stirring shaft.

[0047] A first mounting position is formed between the first positioning member and the second positioning member, and a second mounting position is formed between the second positioning member and the third positioning member.

[0048] The defoaming mechanism 4 includes a first defoaming component and a second defoaming component. The first defoaming component is installed at a first mounting position on the stirring shaft via a first connector, and the second defoaming component is installed at a second mounting position on the stirring shaft via a second connector.

[0049] In this embodiment, the first defoaming member extends in a straight line and forms a 90° angle between the first defoaming member and the first connecting member; the second defoaming member extends upward at an angle and forms a 60° angle between the second defoaming member and the second connecting member.

[0050] In this embodiment, the damper includes a first tension spring and a second tension spring. One end of the first tension spring is connected to the stirring shaft, and the other end is connected to the first defoaming component. One end of the second tension spring is connected to the stirring shaft, and the other end is connected to the second defoaming component.

[0051] 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 modified polyether polyol production apparatus, comprising a tank (1) and a stirring mechanism (2), characterized in that, The tank (1) is provided with a liquid inlet (11). The stirring mechanism (2) includes a motor (21) fixedly installed on the tank (1). The output shaft of the motor (21) passes through the top of the tank (1) and is fixedly connected to a stirring shaft (22). Multiple stirring blades (23) are fixedly installed on the stirring shaft (22). A vacuum pump (3) is provided on one side of the tank (1). The output end of the vacuum pump (3) is connected to the tank (1) through a gas guide pipe. A pressure gauge (12) is provided on the tank (1). A defoaming mechanism (4) is provided on the stirring shaft (22). A liquid level observation gauge (13) is provided on one side of the tank (1).

2. The modified polyether polyol production apparatus according to claim 1, characterized in that: The defoaming mechanism (4) includes a defoaming component (41), on which a plurality of defoaming needles (42) are provided. The defoaming component (41) is sleeved on the stirring shaft (22) through a connector (43), and there is an installation gap between the connector and the stirring shaft.

3. The modified polyether polyol production apparatus according to claim 2, characterized in that: The connector (43) is a sleeve, and a positioning component (44) is provided on the stirring shaft (22). An installation position is formed at the positioning component, and the sleeve is installed at the installation position to install the connector (43) on the stirring shaft.

4. The modified polyether polyol production apparatus according to claim 3, characterized in that: The positioning component includes a first positioning element and a second positioning element, and the mounting position is formed between the first positioning element and the second positioning element.

5. The modified polyether polyol production apparatus according to claim 2, characterized in that: The defoaming component (41) has a straight, arc, or Z-shaped structure.

6. The modified polyether polyol production apparatus according to claim 2, characterized in that: An angle a is formed between the defoaming component (41) and the stirring shaft (22), and the angle a is greater than 0 degrees and less than or equal to 90 degrees.

7. The modified polyether polyol production apparatus according to claim 6, characterized in that: It also includes a pin shaft, and the defoaming component (41) is connected to the connecting component via the pin shaft to adjust the angle between the defoaming component and the stirring shaft.

8. The modified polyether polyol production apparatus according to claim 2, characterized in that: It also includes a damper, one end of which is connected to the stirring shaft and the other end of which is connected to the defoaming component (41).

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