Special dynamic mixer and sealing device

Abstract

The utility model relates to the technical field of rotating shaft high-temperature and high-pressure sealing, blending and modifying equipment, in particular to a special dynamic mixer and a sealing device, which comprise a base, a dynamic mixer, a connector, a sealing component and a power component, the top of the base is used for being detachably connected with a dynamic mixing device, a cavity is formed in the dynamic mixer, the dynamic mixer is arranged on the right side of the top of the base, the bottom of the dynamic mixer is fixedly connected with the top of the base through bolts, and one end of the connector is connected and communicated with the end, away from a mixture outlet, of the dynamic mixer. The sealing assembly is arranged in the joint of the connector and the dynamic mixer and fixedly connected with the inner wall of the connector and the inner wall of the dynamic mixer, the power assembly is arranged on the left side of the top of the base, the bottom of the power assembly is fixedly connected with the top of the base, and the problems that a mixer is large in size, poor in mixing effect and multiple in dead angle are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of high-temperature and high-pressure sealing, blending and modification equipment of rotating shafts, and in particular to a special dynamic mixer and a sealing device. Background Art

[0002] Plastic modification is a relatively broad concept. Whether it is to improve the original properties of resin or improve them through physical, chemical, mechanical and other means, it is called plastic modification. The application range of plastic modification is relatively wide. It can be said that all plastics can be improved through modification methods, such as density, hardness, precision, appearance, processability, transparency, mechanical properties, electromagnetic properties, chemical properties, corrosion resistance, aging resistance, wear resistance, thermal properties, flame retardancy, barrier properties and cost. Plastic modification is the most effective way to reduce costs and improve performance.

[0003] Blending refers to mixing together. It is a physical method to evenly mix several materials to improve the performance of the materials. A typical example is the use of rubber mixers in industry to evenly mix different rubbers or rubber and plastic into rubber compounds. It is also possible to add certain special properties to the polymer to change the properties of the polymer, such as electrical conductivity.

[0004] An indispensable step in either blending or modification is the mixing of different melts, in which the core equipment involved is the mixer. The mixing devices currently used in the chemical industry are static mixers, twin screws and dynamic mixers.

[0005] The mixed materials are classified into solid-liquid, solid-solid, gas-liquid, gas-gas, liquid-liquid according to their forms. According to their molecular weight, they are classified into small molecular weight and large molecular weight. The problem solved by the present invention is the mixing of small molecular weight materials in liquid or gaseous state and high viscosity and high pressure large molecular weight materials under high temperature (≥150°) and high pressure (≥10Mpa). Especially for small molecular weight toxic gases or liquids, these must be leak-free in the chemical industry.

[0006] At present, the only special double-end seals on the market that can withstand high temperature and high pressure low molecular weight gas or liquid are special double-end seals. The pressure resistance of conventional double-end seals is ≤2Mpa. These must be specially made mechanical seals. The cost is expensive. The price of a set may exceed the price of the equipment itself. And it is easy to damage, so it is rarely used in the market. In the field of high temperature and high pressure mixing, the inlet of the twin-screw mixer itself does not have the ability to withstand high pressure, and the production capacity is limited. Static mixers are large in size, poor mixing effect, and many dead corners. Utility Model Content

[0007] In view of this, the present invention aims at the deficiencies of the prior art and proposes a special dynamic mixer and a sealing device, aiming to solve at least one of the problems raised by the above background technology.

[0008] The utility model provides a special dynamic mixer and sealing device, including:

[0009] A base, wherein the bottom of the base is used for fixed connection with the bottom surface, and a shock absorbing spring is provided at the connection between the base and the ground, and the top of the base is used for detachable connection with the dynamic mixing device;

[0010] A dynamic mixer, wherein a cavity is provided inside, the dynamic mixer is provided on the right side of the top of the base, and the bottom of the dynamic mixer is fixedly connected to the top of the base by bolts, the top of the dynamic mixer is provided with a main material inlet, the side wall of the dynamic mixer is provided with an auxiliary material inlet corresponding to the main material inlet, the end of the dynamic mixer away from the main material inlet is provided with a mixed material outlet, the external sleeve of the dynamic mixer is provided with a mixing shell, the mixing shell is provided with a heat medium, and a gear assembly is provided inside the dynamic mixer, and the gear assembly is used to stir the mixed material in the dynamic mixer;

[0011] A connector, with openings at both ends, and arranged transversely, one end of the connector being connected and communicated with an end of the dynamic mixer away from the mixture outlet;

[0012] A sealing component, wherein the sealing component is disposed inside the connection between the connector and the dynamic mixer, and the sealing component is fixedly connected to the inner wall of the connector and the inner wall of the dynamic mixer respectively;

[0013] A power assembly, wherein the power assembly is arranged on the left side of the top of the base, and the bottom of the power assembly is fixedly connected to the top of the base, the output end of the power assembly is fixedly connected to the other end of the connector, and the output shaft of the power assembly passes through the connector and the sealing assembly in sequence and extends into the dynamic mixer, and the end of the output shaft of the power assembly is fixedly connected to the gear assembly.

[0014] In some embodiments, a plurality of connecting columns are vertically arranged at the bottom of the dynamic mixer, and the bottom of the connecting column is fixedly connected to the top of the base by bolts.

[0015] In some embodiments, the transverse axes of the dynamic mixer, connector, and power assembly coincide with each other.

[0016] In some embodiments, the sealing assembly comprises:

[0017] A sliding bearing, wherein the sliding bearing is arranged in the dynamic mixer at a side close to the connector, and an outer wall of the sliding bearing is fixedly connected to the inside of the dynamic mixer;

[0018] A forward spiral seal, which is arranged at the connection between the dynamic mixer and the connector, and the forward spiral seal matches the sliding bearing, and the forward spiral seal is arranged at the left end of the sliding bearing;

[0019] A reverse spiral seal, the forward spiral seal is sleeved on the reverse spiral seal, the forward spiral seal is shorter than the reverse spiral seal, and the reverse spiral seal is arranged at the left end of the forward spiral seal;

[0020] A packing seal ring, which is arranged at the left end of the reverse spiral seal and is arranged in plurality, and the outer wall of the packing seal ring abuts against the inner wall of the connector;

[0021] Two retainers are provided, and an O-ring and a Che seal are provided at the top and bottom of the retainer respectively;

[0022] A packing gland, wherein the packing gland is arranged at the left end of the retainer, and the right end of the packing gland abuts against the left end of the retainer;

[0023] A liquid sealing ring is arranged between the two retaining frames, and one end of the liquid sealing ring passes through the connector and is connected to a liquid sealing system.

[0024] In some embodiments, a cooling device is disposed around the sealing assembly, and the cooling device is used to cool the sealing assembly.

[0025] In some embodiments, the power assembly includes:

[0026] A motor, wherein the motor is arranged on the left side of the top of the base, and the bottom of the motor is fixedly connected to the top of the base;

[0027] A reduction motor is arranged at the right end of the motor, the bottom of the reduction motor is fixedly connected to the top of the base, the motor output end is fixedly connected to the left rotating end of the reduction motor through a coupling, and the right rotating end of the reduction motor is fixedly connected to the left end of the main shaft.

[0028] In some embodiments, the main shaft is arranged horizontally, and its right end passes through the packing gland, retaining frame, O-ring, Che seal, liquid sealing ring, packing seal, reverse spiral seal, sliding bearing in sequence, and extends into the dynamic mixer.

[0029] In some embodiments, the gear assembly includes:

[0030] Stator teeth, wherein a plurality of stator teeth are provided, and the plurality of stator teeth are fixedly connected to the inner wall of the dynamic mixer;

[0031] The movable teeth have a connecting end fixedly connected to the right end of the main shaft, and can drive the movable teeth to rotate when the main shaft rotates.

[0032] The foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure.

[0033] Other features and aspects of the present disclosure will become more apparent from the following detailed description of exemplary embodiments with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0035] Figure 1 A front structural cross-sectional view of a special dynamic mixer and a sealing device provided in an embodiment of the utility model;

[0036] Figure 2 A partial enlarged view of a special dynamic mixer and a sealing device provided in an embodiment of the utility model;

[0037] Figure 3 This is a partial enlarged view of the special dynamic mixer and sealing device provided in the embodiment of the utility model.

[0038] Among them: 1. Motor; 2. Coupling; 3. Reducer motor; 4. Connector; 5. Dynamic mixer; 6. Sealing assembly; 7. Base; 51. Heat medium; 52. Main material inlet; 53. Mixed material outlet; 54. Auxiliary material inlet; 55. Main shaft; 56. Stator teeth; 57. Mover teeth; 61. Sliding bearing; 62. Forward spiral seal; 63. Reverse spiral seal; 64. Cooling device; 65. Packing seal ring; 66. Cage; 67. Liquid sealing ring; 68. O-ring; 69. Che seal; 610. Packing gland; 611. Liquid sealing system. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0040] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0041] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0042] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0043] As mentioned in the background technology, the only special double-end seals on the market that can withstand high temperature and high pressure low molecular weight gas or liquid are the special double-end seals. The conventional double-end seals have a pressure resistance of ≤2Mpa. These must be specially made mechanical seals, which are expensive. The price of a set may exceed the price of the equipment itself, and they are easy to damage, so they are rarely used in the market. In the field of high temperature and high pressure mixing, the inlet of the twin-screw mixer itself does not have the ability to withstand high pressure, and the production capacity is limited. The static mixer is large in size, the mixing effect is poor, and there are many dead corners.

[0044] In order to improve the above problems, the present application proposes a special dynamic mixer and a sealing device to solve the problem of online dynamic mixing of low molecular weight materials and high molecular weight materials under high temperature and high pressure existing in the above prior art.

[0045] See also Figure 1-3 As shown, a special dynamic mixer and sealing device according to an embodiment of the present application includes: a base 7, the bottom of the base 7 is used to be fixedly connected to the bottom surface, and a shock-absorbing spring is provided at the connection between the base 7 and the ground, and the top of the base 7 is used to be detachably connected to the dynamic mixing device;

[0046] The dynamic mixer 5 has a cavity inside. The dynamic mixer 5 is arranged on the right side of the top of the base 7, and the bottom of the dynamic mixer 5 is fixedly connected to the top of the base 7 by bolts. The top of the dynamic mixer 5 is provided with a main material inlet 52, and the side wall of the dynamic mixer 5 is provided with an auxiliary material inlet 54 corresponding to the main material inlet 52. The end of the dynamic mixer 5 away from the main material inlet 52 is provided with a mixed material outlet 53. The outside of the dynamic mixer 5 is provided with a mixing shell 58, and the mixing shell 58 is provided with a heat medium 51. The dynamic mixer 5 is provided with a gear assembly, and the gear assembly is used to stir the mixed material in the dynamic mixer 5;

[0047] A connector 4, which has openings at both ends and is arranged transversely, and one end of the connector 4 is connected and communicated with an end of the dynamic mixer 5 away from the mixture outlet 53;

[0048] A sealing component 6, wherein the sealing component 6 is disposed inside the connection between the connector 4 and the dynamic mixer 5, and the sealing component 6 is fixedly connected to the inner wall of the connector 4 and the inner wall of the dynamic mixer 5 respectively;

[0049] A power assembly, wherein the power assembly is arranged on the left side of the top of the base 7, and the bottom of the power assembly is fixedly connected to the top of the base 7, the output end of the power assembly is fixedly connected to the other end of the connector 4, and the output shaft of the power assembly passes through the connector and the sealing assembly in sequence, and extends into the dynamic mixer 5, and the end of the output shaft of the power assembly is fixedly connected to the gear assembly.

[0050] It should be understood that the sealing assembly 6 includes a sliding bearing 61, a primary seal composed of a forward spiral seal 62 and a reverse spiral seal 63, a packing seal ring 65 as a secondary seal, a tertiary seal composed of a car seal 69, a liquid sealing ring 67, an O-ring 68 and a liquid sealing system 611, a cooling device 64, a packing gland 610, etc. The connector 4 ensures the connection between the reduction motor 3 and the dynamic mixer 5 to ensure concentricity. The power assembly provides power for the equipment; the dynamic mixer 5 is a high pressure resistant type (greater than 26Mpa), and the mixing shell 58 has a flow channel and a heat medium flange for heating (the heating temperature is not greater than 350 degrees).

[0051] The sealing assembly 6 is provided with a cooling device 64, which reduces the damage of high temperature to the Che seal 69 and the O-ring, improves the sealing time, increases the viscosity of the material, improves the spiral sealing effect, and reduces the material leakage pressure and leakage amount.

[0052] In some specific embodiments, a plurality of connecting columns are vertically arranged at the bottom of the dynamic mixer 5 , and the bottom of the connecting column is fixedly connected to the top of the base 7 by bolts.

[0053] In some specific embodiments, the transverse axes of the dynamic mixer 5, the connector 4, and the power assembly coincide with each other.

[0054] In some specific embodiments, the sealing assembly 6 includes:

[0055] A sliding bearing 61, wherein the sliding bearing 61 is disposed in the dynamic mixer 5 and close to the connecting body 4, and an outer wall of the sliding bearing 61 is fixedly connected to the inside of the dynamic mixer 5;

[0056] A forward spiral seal 62 is disposed at the connection between the dynamic mixer 5 and the connector 4, and the forward spiral seal 62 matches the sliding bearing 61, and the forward spiral seal 62 is disposed at the left end of the sliding bearing 61;

[0057] A reverse spiral seal 63, on which the forward spiral seal 62 is sleeved, the forward spiral seal 62 is shorter than the reverse spiral seal 63, and the reverse spiral seal 63 is disposed at the left end of the forward spiral seal 62;

[0058] A packing seal ring 65 is arranged at the left end of the reverse spiral seal 63, and a plurality of packing seal rings are arranged in an arranged manner, and the outer wall of the packing seal ring 65 abuts against the inner wall of the connector 4;

[0059] Two retainers 66 are provided, and an O-ring 68 and a Che seal 69 are provided at the top and bottom of the retainer 66 respectively;

[0060] A packing gland 610, wherein the packing gland 610 is disposed at the left end of the retaining frame 66, and the right end of the packing gland 610 abuts against the left end of the retaining frame 66;

[0061] The liquid sealing ring 67 is disposed between the two retaining frames 66 , and one end of the liquid sealing ring 67 passes through the connector 4 and is connected to the liquid sealing system 611 .

[0062] In some specific embodiments, a cooling device 64 is disposed around the sealing assembly 6 , and the cooling device 64 is used to cool the sealing assembly 6 .

[0063] In some specific embodiments, the power assembly includes:

[0064] Motor 1, the motor 1 is arranged on the left side of the top of the base 7, and the bottom of the motor 1 is fixedly connected to the top of the base 7;

[0065] The reduction motor 3 is arranged at the right end of the motor 1, the bottom of the reduction motor 3 is fixedly connected to the top of the base 7, the output end of the motor 1 is fixedly connected to the left rotating end of the reduction motor 3 through the coupling 2, and the right rotating end of the reduction motor 3 is fixedly connected to the left end of the main shaft 55.

[0066] In some specific embodiments, the main shaft is arranged horizontally, and its right end passes through the packing gland, retaining frame, O-ring, Che seal, liquid sealing ring, packing seal, reverse spiral seal, sliding bearing in sequence, and extends into the dynamic mixer.

[0067] In some specific embodiments, the gear assembly includes:

[0068] Stator teeth 56, wherein a plurality of stator teeth 56 are provided, and the plurality of stator teeth 56 are fixedly connected to the inner wall of the dynamic mixer 5;

[0069] The movable tooth 57 has a connection end fixedly connected to the right end of the main shaft 55 , and the movable tooth 57 can be driven to rotate when the main shaft 55 rotates.

[0070] Specifically, the mixing shell 58 is heated to a specified process temperature through the heat medium 51 according to the material characteristics. After the temperature stabilizes, the material enters through the main material inlet 52 and flows out from the mixed material outlet 53. The starting motor 1 drives the reduction motor 3 through the coupling 2 to stir the main shaft 55. After the pressure stabilizes, the auxiliary material can be added through the auxiliary material inlet 54 according to the amount required by the process. The mixed material begins to mix under the shearing and stirring action of the movable teeth 57 and the stator teeth 56. The motor 1 can adjust the speed through the frequency converter to make the main shaft 55 have different speeds to achieve different mixing effects. During the mixing process of the mixed material, a stream of material is forced to leak out through the action of the forward spiral seal 62, and then a reverse thrust is generated for the leakage under the action of the reverse spiral 63, so that the forward spiral 62 and the reverse spiral 63 are An oil film layer is generated at the junction of the spiral seal 63, thereby achieving a dynamic balance and playing a sealing role. The reverse spiral seal 63 is longer than the forward spiral seal 62, and has a cooling effect of the cooling device 64 to ensure that the material will not leak. After long-term wear, the primary sealing effect is weakened, and some materials will leak out. The polymer material is basically intercepted by the packing seal 65. The packing seal 65 can adjust the leakage of the material through the packing gland 610. However, some small molecular materials can enter the third-level seal through the gap of the packing seal 65. Here, the mixed seal of the Che seal 69 and the O-ring 68 basically prevents the leakage of small molecular materials, and cooperates with the sealing liquid system 611 to ensure the sealing time of the Che seal 69. Under the joint action of the dynamic mixer 5 and the sealing assembly 6, the material is mixed evenly to improve the stability of product quality.

[0071] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A special dynamic mixer and sealing device, characterized in that: include: A base, wherein the bottom of the base is used for fixed connection with the bottom surface, and a shock absorbing spring is provided at the connection between the base and the ground, and the top of the base is used for detachable connection with the dynamic mixing device; A dynamic mixer, wherein a cavity is provided inside, the dynamic mixer is provided on the right side of the top of the base, and the bottom of the dynamic mixer is fixedly connected to the top of the base by bolts, the top of the dynamic mixer is provided with a main material inlet, the side wall of the dynamic mixer is provided with an auxiliary material inlet corresponding to the main material inlet, the end of the dynamic mixer away from the main material inlet is provided with a mixed material outlet, the external sleeve of the dynamic mixer is provided with a mixing shell, the mixing shell is provided with a heat medium, and a gear assembly is provided inside the dynamic mixer, and the gear assembly is used to stir the mixed material in the dynamic mixer; A connector, with openings at both ends, and arranged transversely, one end of the connector being connected and communicated with an end of the dynamic mixer away from the mixture outlet; A sealing component, wherein the sealing component is disposed inside the connection between the connector and the dynamic mixer, and the sealing component is fixedly connected to the inner wall of the connector and the inner wall of the dynamic mixer respectively; A power assembly, wherein the power assembly is arranged on the left side of the top of the base, and the bottom of the power assembly is fixedly connected to the top of the base, the output end of the power assembly is fixedly connected to the other end of the connector, and the output shaft of the power assembly passes through the connector and the sealing assembly in sequence and extends into the dynamic mixer, and the end of the output shaft of the power assembly is fixedly connected to the gear assembly.

2. A special dynamic mixer and sealing device according to claim 1, characterized in that: A plurality of connecting columns are vertically arranged at the bottom of the dynamic mixer, and the bottom of the connecting column is fixedly connected to the top of the base through bolts.

3. A special dynamic mixer and sealing device according to claim 1, characterized in that: The transverse axis lines of the dynamic mixer, the connector and the power assembly coincide with each other.

4. A special dynamic mixer and sealing device according to claim 1, characterized in that: The sealing assembly comprises: A sliding bearing, wherein the sliding bearing is arranged in the dynamic mixer at a side close to the connector, and an outer wall of the sliding bearing is fixedly connected to the inside of the dynamic mixer; A forward spiral seal, which is arranged at the connection between the dynamic mixer and the connector, and the forward spiral seal matches the sliding bearing, and the forward spiral seal is arranged at the left end of the sliding bearing; A reverse spiral seal, the forward spiral seal is sleeved on the reverse spiral seal, the forward spiral seal is shorter than the reverse spiral seal, and the reverse spiral seal is arranged at the left end of the forward spiral seal; A packing seal ring, which is arranged at the left end of the reverse spiral seal and is arranged in plurality, and the outer wall of the packing seal ring abuts against the inner wall of the connector; Two retainers are provided, and an O-ring and a Che seal are provided at the top and bottom of the retainer respectively; A packing gland, wherein the packing gland is arranged at the left end of the retainer, and the right end of the packing gland abuts against the left end of the retainer; A liquid sealing ring is arranged between the two retaining frames, and one end of the liquid sealing ring passes through the connector and is connected to a liquid sealing system.

5. A special dynamic mixer and sealing device according to claim 4, characterized in that: A cooling device is arranged around the sealing assembly, and is used for cooling the sealing assembly.

6. A special dynamic mixer and sealing device according to claim 4, characterized in that: The power assembly comprises: A motor, wherein the motor is arranged on the left side of the top of the base, and the bottom of the motor is fixedly connected to the top of the base; A reduction motor is arranged at the right end of the motor, the bottom of the reduction motor is fixedly connected to the top of the base, the motor output end is fixedly connected to the left rotating end of the reduction motor through a coupling, and the right rotating end of the reduction motor is fixedly connected to the left end of the main shaft.

7. A special dynamic mixer and sealing device according to claim 6, characterized in that: The main shaft is arranged transversely, and the right end thereof sequentially passes through the packing gland, the retaining frame, the O-ring, the Che seal, the liquid sealing ring, the packing seal, the reverse spiral seal, the sliding bearing, and extends into the dynamic mixer.

8. A special dynamic mixer and sealing device according to claim 7, characterized in that: The gear assembly comprises: Stator teeth, wherein a plurality of stator teeth are provided, and the plurality of stator teeth are fixedly connected to the inner wall of the dynamic mixer; The movable teeth have a connecting end fixedly connected to the right end of the main shaft, and can drive the movable teeth to rotate when the main shaft rotates.

Images