Static mixer

Abstract

The static mixer comprises a mixing pipe, mixing unit bodies and a lining pipe, the outer diameter of the lining pipe is matched with the inner diameter of the mixing pipe, the mixing unit bodies are arranged in the lining pipe, and a first gland and a second gland which abut against the mixing unit bodies tightly are connected into an upper port and a lower port of the lining pipe respectively. A first through hole and a second through hole are formed in the first gland and the second gland respectively, a limiting ring is formed on the peripheral side of the first gland, the upper end and the lower end of the mixing pipe are connected with a first connecting flange and a second connecting flange respectively, and the lining pipe is inserted into the mixing pipe to enable the limiting ring to abut against the end face of the first connecting flange. The first connecting flange is connected with a fastening flange for pressing the limiting ring, and a third through hole aligned with the first through hole is formed in the fastening flange. According to the static mixer, the mixing unit bodies arranged in the mixing pipe can be replaced by dismounting the lining pipe so as to adapt to different production scenes, the static mixer has better applicability, and the mixing unit bodies can be conveniently and deeply cleaned.

Description

Technical Field

[0001] The utility model relates to the technical field of polyurethane production equipment, in particular to a static mixer. Background Art

[0002] In polyurethane production, static mixers are used to mix and disperse reactants, ensuring they are thoroughly mixed within the mixer to improve reaction efficiency and product quality. Static mixers primarily consist of a connecting and supporting mixing tube and several stacked mixing units positioned within the tube. These units have various structural configurations depending on the type of fluid being used. Existing static mixers are difficult to replace once the mixing units are installed within the mixing tube, limiting their application scenarios.

[0003] In view of the above problems, the present invention makes improvements. Utility Model Content

[0004] The utility model provides a static mixer, which solves the above problems existing in the prior art during use.

[0005] The technical solution of the present utility model is achieved as follows:

[0006] A static mixer comprises a mixing tube and a mixing unit, and also comprises an inner liner tube whose outer diameter matches the inner diameter of the mixing tube. Several of the mixing units are arranged in the inner liner tube, and the upper and lower ports of the inner liner tube are respectively connected to a first pressure cover and a second pressure cover that are tightly against the mixing unit. The first pressure cover and the second pressure cover are respectively provided with a first through hole and a second through hole, and a limiting ring is formed on the circumference of the first pressure cover. The upper and lower ends of the mixing tube are respectively connected with a first connecting flange and a second connecting flange. The inner liner tube is inserted into the mixing tube so that the limiting ring is against the end face of the first connecting flange. The first connecting flange is connected to a fastening flange for tightening the limiting ring, and the fastening flange is provided with a third through hole aligned with the first through hole.

[0007] Preferably, the limiting ring is polygonal, and a limiting groove matching the limiting ring is provided on the end surface of the first connecting flange, and the limiting ring is placed in the limiting groove.

[0008] Preferably, a transfer tube is connected in the third through hole, and a four-way joint is connected to the transfer tube.

[0009] Preferably, an adapter ring is formed on the first pressure cover, which matches the third through hole and penetrates into the third through hole. A plug-in portion is formed at the lower end of the adapter tube, which matches the inner diameter of the adapter ring. The lower end of the adapter tube is screwed into the third through hole so that the plug-in portion is inserted into the adapter ring.

[0010] Preferably, a sealing step is formed on the outer wall of the lower end of the adapter tube, a sealing ring is provided on the sealing step, and the upper end of the adapter ring is tightly against the sealing ring.

[0011] Preferably, the first gland and the second gland are respectively screwed into the upper and lower ports of the liner pipe.

[0012] Preferably, the outer jacket of the mixing tube is provided with a constant temperature interlayer, and the constant temperature interlayer is respectively connected to a water inlet pipe and a water outlet pipe distributed up and down.

[0013] To sum up, the beneficial effect of the present invention is that after the fastening flange is removed, the inner liner tube can be pulled out of the mixing tube, and the inner liner tube with different types of mixing units can be replaced without removing the mixing tube from the equipment, thereby facilitating the operation of replacing the mixing unit and making the static mixer more applicable. Moreover, after washing off the inner liner tube, it is also convenient to carry out deep cleaning of the mixing unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0015] Figure 1 It is a cross-sectional schematic diagram of the utility model;

[0016] Figure 2 for Figure 1 A magnified schematic diagram of point A in the middle;

[0017] Figure 3 It is an exploded schematic diagram of the present utility model.

[0018] In the figure: 1. mixing tube; 11. first connecting flange; 12. second connecting flange; 13. limiting groove; 2. mixing unit; 3. inner liner; 4. first pressure cover; 41. first through hole; 42. limiting ring; 43. adapter ring; 5. second pressure cover; 51. second through hole; 6. fastening flange; 61. third through hole; 7. adapter tube; 71. plug-in part; 72. sealing step; 73. sealing ring; 8. four-way joint; 9. constant temperature interlayer; 91. water inlet pipe; 92. water outlet pipe. DETAILED DESCRIPTION

[0019] The following is a combination of the appended examples of the present invention Figure 1-3, clearly and completely describes the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0020] As shown in the figure, a static mixer includes a mixing tube 1, a mixing unit 2 and an inner liner tube 3. The outer diameter of the inner liner tube 3 matches the inner diameter of the mixing tube 1. Several mixing units 2 are arranged in the inner liner tube 3. The upper and lower ends of the inner liner tube 3 are respectively connected with a first pressure cover 4 and a second pressure cover 5 that are tightly against the mixing unit 2. The first pressure cover 4 and the second pressure cover 5 are respectively provided with a first through hole 41 and a second through hole 51. A limiting ring 42 is formed on the circumference of the first pressure cover 4. The upper and lower ends of the mixing tube 1 are respectively connected with a first connecting flange 11 and a second connecting flange 12. The inner liner tube 3 is inserted into the mixing tube 1 so that the limiting ring 42 is against the end face of the first connecting flange 11. The first connecting flange 11 is connected with a fastening flange 6 for tightening the limiting ring 42. The fastening flange 6 is provided with a third through hole 61 aligned with the first through hole 41.

[0021] Through the above structure, after the mixing unit 2 is placed in the inner liner tube 3, it is retained in the inner liner tube 3 by the limitation of the first pressure cover 4 and the second pressure cover 5. After the inner liner tube 3 is inserted into the mixing tube 1 and the limiting ring 42 is pressed against the first connecting flange 11 by the fastening flange 6, the inner liner tube 3 is retained in the mixing tube 1 by the limitation of the limiting ring 42 by the fastening flange 6, that is, the mixing unit 2 in the inner liner tube 3 is retained in the mixing tube 1. When performing the material mixing operation, the second connecting flange 12 is fixedly connected to the subsequent processing equipment or the mixed material collection equipment, and is connected to the material feeding pipe through the third through hole 61 on the fastening flange 6. The two materials to be mixed enter the inner liner tube 3 after passing through the third through hole 61 and the first through hole 41 in turn. The two materials entering the inner liner tube 3 are mixed by the action of the mixing unit 2 when passing through the inner liner tube 3. The mixed material flows out of the inner liner tube 3 through the second through hole 51 to complete the mixing of the materials. When the type of mixing unit 2 needs to be changed to adapt to the mixing operation of different materials, the fastening flange 6 is removed, the liner tube 3 is pulled out from the mixing tube 1, and then the liner tube 3 with different types of mixing units 2 inside is inserted into the mixing tube 1, and the fastening flange 6 is installed to realize the replacement of the mixing unit 2. Since the mixing tube 1 does not need to be removed from the equipment during the replacement process, the operation of replacing the mixing unit 2 is facilitated, making this static mixer more applicable. Moreover, after the liner tube 3 is removed, it is also convenient to carry out deep cleaning of the mixing unit 2.

[0022] In addition, the limiting ring 42 is polygonal, and a limiting groove 13 matching the limiting ring 42 is provided on the end face of the first connecting flange 11. The limiting ring 42 is placed in the limiting groove 13. Through the cooperation between the limiting ring 42 and the limiting groove 13, the rotation of the inner liner tube 3 relative to the mixing tube 1 is limited, so that the inner liner tube 3 is more stably maintained in the mixing tube 1, thereby ensuring the stability of the mixing unit 2 when mixing materials.

[0023] In addition, a transfer tube 7 is connected to the third through hole 61, and a four-way joint 8 is connected to the transfer tube 7. The four-way joint 8 is respectively connected to the feed pipe and the cleaning pipe of the two materials, which facilitates the disassembly and assembly of each pipeline and the liner tube 3, thereby facilitating the operation when replacing the mixing unit 2, and also facilitating the connection of the feed pipes of different materials after replacing the mixing unit 2.

[0024] In addition, an adapter ring 43 is formed on the first pressure cover 4, which matches the third through hole 61 and is inserted into the third through hole 61. The lower end of the adapter tube 7 is formed with a plug-in portion 71 that matches the inner diameter of the adapter ring 43. The lower end of the adapter tube 7 is screwed into the third through hole 61 so that the plug-in portion 71 is inserted into the adapter ring 43. After the plug-in portion 71 is inserted into the adapter ring 43, a sealing surface is formed between the two, thereby strengthening the sealing between the adapter tube 7 and the first pressure cover 4, and also strengthening the sealing between the adapter tube 7 and the inner liner 3, thereby strengthening the sealing when the material is fed into the inner liner 3, preventing the material from leaking during the mixing operation.

[0025] In addition, a sealing step 72 is formed on the outer wall of the lower end of the adapter tube 7, and a sealing ring 73 is provided on the sealing step 72. The upper end of the adapter ring 43 is tightly against the sealing ring 73, and the sealing between the adapter tube 7 and the inner liner pipe 3 is further strengthened by the sealing ring 73.

[0026] In addition, the first pressure cover 4 and the second pressure cover 5 are respectively screwed into the upper and lower ports of the inner liner tube 3, which facilitates the disassembly and assembly of the first pressure cover 4 and the second pressure cover 5. After the inner liner tube 3 is pulled out from the mixing tube 1, the first pressure cover 4 and the second pressure cover 5 can be removed and the mixing unit 2 can be taken out from the inner liner tube 3, which is convenient for cleaning the mixing unit 2.

[0027] In addition, the mixing tube 1 is provided with a constant temperature interlayer 9 on the outer sleeve, and the constant temperature interlayer 9 is respectively connected with an inlet pipe 91 and an outlet pipe 92 distributed upper and lower. The inlet pipe 91 and the outlet pipe 92 are connected to the external water circulation equipment. By injecting water of a certain temperature into the constant temperature inner interlayer, the material is mixed in the inner lining tube 3 at a suitable temperature, thereby ensuring the mixing effect.

[0028] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A static mixer, comprising a mixing tube (1) and a mixing unit (2), characterized in that: The invention also includes an inner liner tube (3) whose outer diameter matches the inner diameter of the mixing tube (1), and a plurality of the mixing units (2) are arranged in the inner liner tube (3). The upper and lower ends of the inner liner tube (3) are respectively connected to a first pressure cover (4) and a second pressure cover (5) which are tightly against the mixing unit (2). The first pressure cover (4) and the second pressure cover (5) are respectively provided with a first through hole (41) and a second through hole (51). A limiting ring (42) is formed on the circumference of the first pressure cover (4). The upper and lower ends of the mixing tube (1) are respectively connected to a first connecting flange (11) and a second connecting flange (12). The inner liner tube (3) is inserted into the mixing tube (1) so that the limiting ring (42) is against the end face of the first connecting flange (11). The first connecting flange (11) is connected to a fastening flange (6) for pressing the limiting ring (42), and the fastening flange (6) is provided with a third through hole (61) aligned with the first through hole (41).

2. The static mixer according to claim 1, characterized in that: The limiting ring (42) is polygonal, and a limiting groove (13) matching the limiting ring (42) is provided on the end surface of the first connecting flange (11), and the limiting ring (42) is placed in the limiting groove (13).

3. The static mixer according to claim 2, characterized in that: A transfer tube (7) is connected to the third through hole (61), and a four-way joint (8) is connected to the transfer tube (7).

4. The static mixer according to claim 3, characterized in that: An adapter ring (43) is formed on the first pressure cover (4) and matches the third through hole (61) and is inserted into the third through hole (61). A plug-in portion (71) that matches the inner diameter of the adapter ring (43) is formed at the lower end of the adapter tube (7). The lower end of the adapter tube (7) is screwed into the third through hole (61) so that the plug-in portion (71) is inserted into the adapter ring (43).

5. The static mixer according to claim 4, characterized in that: A sealing step (72) is formed on the outer wall of the lower end of the adapter tube (7), a sealing ring (73) is provided on the sealing step (72), and the upper end of the adapter ring (43) is tightly against the sealing ring (73).

6. The static mixer according to claim 1, characterized in that: The first gland (4) and the second gland (5) are respectively screwed into the upper and lower ports of the liner pipe (3).

7. The static mixer according to claim 1, characterized in that: The mixing tube (1) is provided with a thermostatic interlayer (9) on its outer jacket, and the thermostatic interlayer (9) is respectively connected to an inlet pipe (91) and an outlet pipe (92) distributed up and down.

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