Improved stainless steel stirring device in piperidine preparation

Abstract

The utility model discloses an improved stainless steel stirring device in piperidine preparation, and relates to the technical field of stirring structures, the improved stainless steel stirring device comprises a middle fixed end and a stirring rod, the stirring rod is connected to the outer wall of the middle fixed end, the lower side of the stirring rod is fixedly connected with an additional stirring paddle, and the additional stirring paddle is set to be in a bent rod shape. According to the scheme, an existing stainless steel stirring structure is simply improved, the stirring position of the stainless steel reaction kettle can be lowered under the condition that the rotating shaft and the stirring rod are not replaced and the shaft seat is not disassembled, the effective stirring position is lowered, and the requirement of a piperidine project is met. By additionally arranging the stirring paddle, the effective stirring position of the lower side of the stirring rod is lowered, so that liquid with a lower liquid level can be contacted by additionally arranging the stirring paddle, and stirring treatment can also be performed when a small amount of liquid is added. On the basis of not influencing the original stirring function, the stirring range is expanded, and only the stirring paddle needs to be simply added.

Description

Technical Field

[0001] The utility model relates to the technical field of stirring structures, in particular to an improved stainless steel stirring device for piperidine preparation. Background Art

[0002] Stainless steel reactor is a kind of intermittent reaction device commonly used in the production process of chemical and pharmaceutical intermediates. Its stirring forms include propeller stirring and paddle stirring.

[0003] like Figure 4 、 5 As shown: For example, in the preparation process of some piperidine projects, in the step of cyano hydrolysis reaction, the volume of the early reaction liquid is relatively small, only about 600L, and the liquid in the stainless steel reactor 1 must reach more than 800L before it can be stirred (when the amount of liquid is small, the rotating shaft 2 and the stirring rod 3 cannot contact the liquid). The rotating shaft 2 and the stirring rod 3 need to be lowered further. Since the rotating shaft 2 and the stirring rod 3 are not long enough, they need to be re-purchased, and there is a shaft seat 4 at a certain height in the center of the bottom of the reactor 1 (the shaft seat 4 is used to install the rotating shaft 2), which must be cut and removed. The operation is more difficult and causes waste of materials. Utility Model Content

[0004] (1) Technical problems solved

[0005] In view of the deficiencies in the prior art, the utility model provides an improved stainless steel stirring device for piperidine preparation, which solves the problem that when the stirring structure is currently modified, the stirring structure needs to be cut, which makes the operation difficult and causes waste of materials.

[0006] (2) Technical solution

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: an improved stainless steel stirring device for piperidine preparation, comprising:

[0008] Middle fixed end, stirring rod;

[0009] The stirring rod is connected to the outer wall of the middle fixed end, and the lower side of the stirring rod is fixedly connected with an additional stirring paddle, which is set to be a bent rod shape, and the two ends of the additional stirring paddle are respectively connected to the two ends of the stirring rod.

[0010] Preferably, a fastening screw is inserted into the middle of the intermediate fixing end, and the fastening screw passes through the intermediate fixing end.

[0011] Preferably, the middle fixed end includes two fixed clamps, and a connecting plate is provided on the outer side of the adjacent ends of the two fixed clamps, and the connecting plates of the two fixed clamps are connected by bolts.

[0012] Preferably, the two ends of the additional stirring paddle are respectively welded to the two ends of the stirring rod.

[0013] Preferably, one end of the added stirring paddle is provided with a plug-in column, the other end of the added stirring paddle is provided with a collar, a positioning pin is inserted into the collar, the outer end of the stirring rod is provided with a plug-in hole matching the plug-in column, and the positioning pin passes through the stirring rod.

[0014] Preferably, a gasket is embedded inside the middle fixed end.

[0015] (3) Beneficial effects

[0016] The utility model provides an improved stainless steel stirring device for piperidine preparation, which has at least the following beneficial effects compared with the prior art:

[0017] This solution makes a simple improvement to the existing stainless steel stirring structure. Without replacing the rotating shaft, stirring rod and removing the shaft seat, the stirring position of the stainless steel reactor can be lowered, thereby reducing the effective stirring position and meeting the requirements of the piperidine project.

[0018] By adding a stirring paddle, the effective stirring position on the lower side of the stirring rod is lowered, so that the stirring paddle can contact the liquid with a lower liquid level, so that stirring can be performed even when a small amount of liquid is present.

[0019] On the basis of not affecting the original stirring function, the stirring range is expanded, and only the stirring paddle needs to be simply added. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of the utility model;

[0021] Figure 2 This is a schematic diagram of the structure of the utility model when the middle fixed end adopts two fixed collars;

[0022] Figure 3 This is a schematic diagram of the structure of the utility model when the stirring paddle is installed in a detachable manner;

[0023] Figure 4 It is a structural diagram of an existing simple reactor;

[0024] Figure 5 for Figure 4 Schematic diagram of the internal structure of the reactor.

[0025] In the figure: 1. Reactor; 2. Rotating shaft; 3. Stirring rod; 4. Shaft seat; 5. Middle fixed end; 6. Fastening screw; 7. Connecting plate; 8. Additional stirring paddle; 9. Collar; 10. Positioning pin; 11. Connecting column. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] Example 1:

[0028] See also Figure 1-5 , the utility model provides a technical solution: an improved stirring device, comprising: an intermediate fixed end 5, a stirring rod 3;

[0029] Among them, the stirring rod 3 is connected to the outer wall of the middle fixed end 5, and the lower side of the stirring rod 3 is fixedly connected with an additional stirring paddle 8, which is set to be a bent rod shape, and the two ends of the additional stirring paddle 8 are respectively connected to the two ends of the stirring rod 3.

[0030] Analysis of the above content: When the existing reactor 1 is used, if Figure 4 、 5 As shown, the raw materials to be stirred are placed in the reactor 1 (determine whether to add a lid to the reactor 1 according to usage requirements), and the external driving mechanism (such as a motor) drives the rotating shaft 2 and the stirring rod 3 to rotate. The stirring rod 3 stirs and mixes the raw materials in the reactor, and the lower side of the rotating shaft 2 is supported by the shaft seat 4, so that the rotating shaft 2 runs stably.

[0031] When there is less raw material in the reactor 1, the rotating stirring rod 3 cannot contact the raw material and the stirring effect cannot be achieved. At this time, a stirring paddle 8 is set on the lower side of the stirring rod 3. The installation of the stirring paddle 8 lowers the effective stirring position of the stirring rod 3, so that stirring can be performed even when there is less raw material.

[0032] Example 2:

[0033] See also Figure 1-5 The present invention provides a technical solution based on the first embodiment: a fastening screw 6 is inserted into the middle of the intermediate fixing end 5 , and the fastening screw 6 passes through the intermediate fixing end 5 .

[0034] Analyzing the above content: the fastening screw 6 simultaneously penetrates the stirring rod 3 , so that the middle fixed end 5 can be stably fixed on the stirring rod 3 .

[0035] Example 3:

[0036] See also Figure 1-5The present invention provides a technical solution based on Example 1: the intermediate fixed end 5 includes two fixed clamps, and a connecting plate 7 is provided on the outer side of the two adjacent ends of the fixed clamps, and the connecting plates 7 of the two fixed clamps are connected by bolts.

[0037] Analysis of the above content: This connection method is different from the connection method in Example 2. Since the middle fixed end 5 is set as two fixed clamps, the two fixed clamps can be close to each other and clamped on the outer wall of the rotating shaft 2, and the two fixed clamps are connected and fixed by bolts. This combined connection method can be installed after the shaft seat 4 is installed.

[0038] Example 4:

[0039] See also Figure 1-5 The present invention provides a technical solution based on the first embodiment: the two ends of the additional stirring paddle 8 are respectively welded to the two ends of the stirring rod 3.

[0040] Analysis of the above content: There are two ways to connect the added stirring paddle 8 and the stirring rod 3. Here is the first one, which is to weld the added stirring paddle 8 and the stirring rod 3. The welding method is relatively stable and not easy to loosen.

[0041] Embodiment 5:

[0042] See also Figure 1-5 The utility model provides a technical solution based on embodiment 1: one end of the stirring paddle 8 is provided with a plug-in column 11, and the other end of the stirring paddle 8 is provided with a ring 9, and a positioning pin 10 is inserted into the ring 9. The outer end of the stirring rod 3 is provided with a plug-in hole matching the plug-in column 11, and the positioning pin 10 passes through the stirring rod 3.

[0043] Analysis of the above content: This scheme embodies the second connection method of the added stirring paddle 8 and the stirring rod 3. During installation, the ring 9 is put on the outer end of the stirring rod 3, and then the ring 9, the added stirring paddle 8, and the plug-in column 11 are pushed into the interior of the stirring rod 3 until the plug-in column 11 is inserted into the plug-in hole of the stirring rod 3. At this time, the added stirring paddle 8 is moved into place. At this time, the positioning pin 10 is passed through the stirring rod 3. The two ends of the positioning pin 10 can be connected with nuts, and the nuts are located on the outside of the stirring rod 3. In this way, the added stirring paddle 8 is restricted by the positioning pin 10 and rotates synchronously with the rotation of the stirring rod 3.

[0044] Example 6:

[0045] See also Figure 1-5 The present invention provides a technical solution based on the first embodiment: a gasket is embedded in the middle fixed end 5 .

[0046] Analysis of the above content: The gasket is made of stainless steel or plastic, so as to fill the gap between the middle fixed end 5 and the stirring rod 3 to prevent loosening.

[0047] This solution makes a simple improvement to the existing stainless steel stirring structure. Without replacing the rotating shaft 2, stirring rod 3 and removing the shaft seat 4, the stirring position of the stainless steel reactor can be lowered, thereby reducing the effective stirring position and meeting the requirements of the piperidine project.

[0048] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0049] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A stainless steel stirring improved device for piperidine preparation, characterized in that: include: An intermediate fixed end (5) and a stirring rod (3); The stirring rod (3) is connected to the outer wall of the middle fixed end (5), and the lower side of the stirring rod (3) is fixedly connected with an additional stirring paddle (8), the additional stirring paddle (8) is set to be a bent rod shape, and the two ends of the additional stirring paddle (8) are respectively connected to the two ends of the stirring rod (3).

2. The stainless steel stirring improved device for piperidine preparation according to claim 1, characterized in that: A fastening screw (6) is inserted into the middle of the intermediate fixing end (5), and the fastening screw (6) passes through the intermediate fixing end (5).

3. The improved stainless steel stirring device for piperidine preparation according to claim 1, wherein: The middle fixed end (5) comprises two fixed clamps, and a connecting plate (7) is provided on the outer sides of the adjacent ends of the two fixed clamps, and the connecting plates (7) of the two fixed clamps are connected by bolts.

4. The improved stainless steel stirring device for piperidine preparation according to claim 1, wherein: The two ends of the additional stirring paddle (8) are respectively welded to the two ends of the stirring rod (3).

5. The improved stainless steel stirring device for piperidine preparation according to claim 1, characterized in that: One end of the additional stirring paddle (8) is provided with a plug-in column (11), and the other end of the additional stirring paddle (8) is provided with a collar (9), and a positioning pin (10) is plugged into the collar (9). The outer end of the stirring rod (3) is provided with a plug-in hole matching the plug-in column (11), and the positioning pin (10) passes through the stirring rod (3).

6. The improved stainless steel stirring device for piperidine preparation according to claim 1, characterized in that: A gasket is embedded in the interior of the middle fixed end (5).

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