Uniform feeding device of Grignard reaction kettle

Abstract

The invention relates to a uniform feeding device of a Grignard reaction kettle, which comprises a feeding ring, a fixed ring and a rotating part, the fixed ring is arranged in the reaction kettle, the feeding ring is rotatably mounted on the fixed ring, the feeding ring is provided with a ring groove, the bottom of the feeding ring is provided with a plurality of feeding holes, and the fixed ring is provided with a feeding pipe connected with an external feeding pump. One end of the feeding pipe is communicated with the annular groove, a stirring assembly is arranged in the reaction kettle, and the rotating part is arranged in the reaction kettle and connected with the stirring assembly; before reaction, a base solution is added into the reaction kettle, the feeding pump feeds materials into the annular groove of the feeding ring through the feeding pipe, the materials are discharged through the feeding hole in the bottom of the feeding ring, meanwhile, the stirring assembly stirs the materials, and the rotating part drives the feeding ring to rotate and discharge the materials for dropwise adding reaction. And low yield caused by overhigh local reaction concentration is not easy to occur.

Description

Technical Field

[0001] The present application relates to the field of Grignard reactors, and in particular to a uniform feeding device for Grignard reactors. Background Art

[0002] Triphenylphosphine is a commonly used ligand in organic synthesis. Triphenylphosphine uses chlorobenzene and magnesium chips as starting materials, undergoes Grignard reaction, ligandization, hydrolysis, concentration, distillation, and finally refines to obtain the finished product.

[0003] During the Grignard reaction, chlorobenzene and a mixed solvent are usually prepared in a certain proportion in a reaction raw material preparation tank and then pumped to a dropping tank for use. Magnesium chips and catalyst are added through the feeding port of the Grignard reactor with bottom liquid. When the temperature reaches a certain level, the prepared reaction raw materials are added dropwise to react, and then the reaction is kept warm for a period of time.

[0004] During the dropwise addition reaction, the raw materials are usually added to the same position in the reactor. The raw materials are fixedly added to the same area in the reactor for a long time. The raw materials are not well dispersed in the reactor and are not mixed evenly with the bottom liquid in the reactor. This can easily lead to excessive local concentration, aggravated side reactions, reduced reaction yield, and affected product quality. Summary of the Invention

[0005] In order to solve the problem that adding raw materials at the same position in the reactor easily leads to local excessive concentration, thereby reducing the reaction yield and affecting product quality, the present application provides a uniform feeding device for a Grignard reactor.

[0006] The present application provides a uniform feeding device for a Grignard reactor using the following technical solutions: A uniform feeding device for a Grignard reactor comprises a feeding ring, a fixed ring and a rotating member, wherein the fixed ring is arranged in the reactor and is rotatably mounted on the fixed ring, the feeding ring is provided with an annular groove, the bottom of the feeding ring is provided with a plurality of feeding holes connected to the annular groove, the fixed ring is provided with a feeding pipe connected to an external feeding pump, one end of the feeding pipe is connected to the annular groove, a stirring assembly for stirring materials is provided in the reactor, the rotating member is arranged in the reactor and is connected to the stirring assembly, and when the stirring assembly drives stirring, the rotating member drives the feeding ring to rotate.

[0007] By adopting the above technical solution, the bottom liquid is first added to the reactor before the reaction, the feeding pump feeds the material into the ring groove of the feeding ring through the feeding pipe, and the material is discharged through the feeding hole at the bottom of the feeding ring. At the same time, the stirring component stirs the material, and the feeding ring is driven by the rotating part to rotate and discharge the material for dropwise reaction. The material is fed evenly by rotation and mixed evenly with the bottom liquid, and the problem of low yield caused by excessive local reaction concentration is less likely to occur.

[0008] Optionally, the stirring assembly includes a stirring shaft and stirring blades, the stirring shaft is rotatably installed in the reactor and distributed along the axis direction of the reactor, the stirring blades are arranged on the outer peripheral wall of the stirring shaft, and a stirring motor for driving the stirring shaft to rotate is provided on the top of the reactor. The rotating part includes a connecting rod and a ball, the connecting rod is arranged on one side of the feeding ring, the ball is rotatably installed at one end of the connecting rod, a limiting groove is provided on the stirring shaft, and the ball is rollingly connected to the stirring shaft through the limiting groove.

[0009] By adopting the above technical solution, during stirring, the stirring motor drives the stirring shaft to rotate and drives the stirring blades to stir. At the same time, the limiting groove on the stirring shaft drives the feeding ring to rotate synchronously through the ball through the connecting rod, and the driving operation is convenient.

[0010] Optionally, a screw is rotatably installed outside the reactor, and the screw and the axis of the reactor are distributed parallel to each other. A sliding rod is slidably installed on the reactor, and a sliding frame is slidably installed outside the reactor. The sliding frame is threadedly connected to the screw, and one end of the sliding rod is connected to the sliding frame. The end of the sliding rod facing away from the sliding frame is located in the reactor and connected to a side surface of the fixed ring. A driving motor for driving the screw to rotate is provided on the outside of the reactor.

[0011] By adopting the above technical solution, the driving motor drives the screw to rotate, the screw drives the sliding frame to slide, the sliding frame drives the sliding rod to slide, and the sliding rod drives the fixed ring to move along the axial direction of the reactor. During the reaction, the position of the fixed ring is first adjusted to a lower position in the reactor, and then the height is gradually raised. During the reaction, the dropping height of the feeding ring always maintains a certain height with the liquid level, reducing the problem of high height during the initial reaction dropwise addition, resulting in splashing and thus reducing the reaction efficiency.

[0012] Optionally, an annular connecting groove is provided on the stirring shaft, the connecting groove is distributed along the outer peripheral wall of the stirring shaft and is connected to the upward end of the limiting groove, the limiting groove is distributed along the length direction of the stirring shaft, and a limiting component for limiting the connecting rod is provided in the reactor and on the upper side of the limiting groove.

[0013] By adopting the above technical solution, when the connecting rod moves along the limit groove to the connecting groove, the ball rolls along the annular connecting groove. At this time, the connecting rod and the stirring shaft are separated, and the limit component limits the position of the connecting rod. When the stirring shaft rotates, the connecting rod no longer rotates, which makes it convenient for the stirring shaft to continue stirring for reaction after the dropwise addition is completed.

[0014] Optionally, the limiting assembly includes a rotating ring and a pressure ring, the rotating ring is rotatably installed on the top wall of the reactor and is coaxially distributed with the stirring shaft, the pressure ring is arranged on the downward side of the rotating ring, the pressure ring and the rotating ring are slidingly connected along the axial direction of the stirring shaft, the pressure ring is provided with a clamping part for limiting the connecting rod, and an abutment part for limiting the pressure ring is provided in the reactor.

[0015] By adopting the above technical solution, when the connecting rod moves along the limit groove to the clamping part, the connecting rod and the clamping part are clamped and drive the pressure ring to rotate. When the fixed ring drives the feeding ring to move, it also drives the pressure ring to move. When the feeding ring moves to the connecting groove, the abutment limits the position of the pressure ring. At the same time, the ball at one end of the connecting rod moves along the limit groove to the connecting groove. At this time, the feeding ring is limited, and the limiting operation is convenient during the movement.

[0016] Optionally, the clamping part includes a first abutment block and a second abutment block, the first abutment block and the second abutment block are both slidably mounted on the pressure ring, a rotating rod is rotatably mounted on the pressure ring, both ends of the rotating rod are slidingly connected to the first abutment block and the second abutment block respectively, a tensioning spring is provided on the pressure ring, one end of the tensioning spring is connected to the side of the rotating rod facing the first abutment block, the first abutment block is provided with an abutment column located at the lower side of the pressure ring, an abutment groove is provided on the pressure ring, and the abutment column is abutted and connected to one side of the pressure ring through the abutment groove.

[0017] By adopting the above technical solution, when one end of the connecting rod rotates to the side of the first abutment block, the connecting rod pushes the first abutment block to slide, pushes the rotating rod to rotate and then pushes the second abutment block to slide, and the abutment column on the first abutment block abuts and limits the abutment groove of the pressure ring. The first abutment block and the second abutment block synchronously limit the two sides of the connecting rod. At the same time, when the feeding ring rises, the first abutment block and the second abutment block are pushed to press tightly against the connecting rod, which facilitates the limited connection between the pressure ring and the connecting rod.

[0018] Optionally, the abutment member includes an abutment ring and a first magnet, the abutment ring is arranged in the reactor and coaxially distributed with the pressure ring, the first magnet is arranged on the outer peripheral wall of the abutment ring, a retaining ring is coaxially arranged on the outer peripheral wall of the pressure ring, and a second magnet is arranged on the outer peripheral wall of the retaining ring. When the pressure ring moves to the point where the retaining ring abuts against one side of the abutment ring, the first magnet and the second magnet are magnetically connected.

[0019] By adopting the above technical solution, when the pressure ring rotates until the retaining ring abuts against one side of the abutting ring, the ball at one end of the connecting rod moves to the connecting groove, and at the same time, the first magnet and the second magnet are magnetically attracted to each other, thereby fixing the pressure ring and the abutting ring. At this time, the position of the connecting rod is fixed, the feeding ring stops rotating, and the limiting operation of the connecting rod is convenient.

[0020] Optionally, a positioning column is provided on the top of the stirring shaft, and the positioning column and the axis of the stirring shaft are perpendicular to each other. A positioning member is slidably installed on the reactor to limit the positioning of one end of the positioning column. When the positioning column is limited, the connecting rod is located at the limiting groove.

[0021] By adopting the above technical solution, when the reaction is completed and the feeding ring needs to be moved back to the lower position in the reactor, the positioning column drives the stirring shaft to rotate to the positioning part, and the positioning part limits the positioning column. At this time, the fixed ring is driven to drive the connecting rod on the feeding ring to move, which is convenient for the next feeding reaction.

[0022] Optionally, the positioning member includes a positioning sleeve and a positioning spring, the reactor is provided with a connecting sleeve, the positioning sleeve is slidably installed on the connecting sleeve along the direction toward or away from the positioning column, the positioning spring is provided on the connecting sleeve and connected to the positioning sleeve, the positioning sleeve is provided with a sliding positioning protrusion and a pushing spring for pushing the positioning protrusion to slide, the connecting sleeve is provided with a positioning groove, the positioning protrusion is clamped and connected to the connecting sleeve through the positioning groove, a slot is provided at one end of the positioning sleeve, and one end of the positioning column is plug-connected to the positioning sleeve through the slot.

[0023] By adopting the above technical solution, when the positioning column is rotated to one end of the positioning sleeve, the positioning sleeve is pulled to slide to one end of the positioning column and plugged into the slot of the positioning sleeve. At this time, the push spring pushes the positioning protrusion to be clamped in the positioning groove of the connecting sleeve, and the limit groove on the stirring shaft and the connecting rod position are positioned. When the stirring shaft needs to be separated for stirring, the positioning protrusion is removed from the positioning groove. At this time, the positioning spring pulls the positioning sleeve and the positioning column apart, which facilitates positioning.

[0024] Optionally, a scraper is provided at the bottom of the stirring shaft, and one side of the scraper is in contact with the side of the bottom of the reactor.

[0025] By adopting the above technical solution, when the stirring shaft stirs, the scraper stirs the material at the bottom of the reactor, reducing the problem of insufficient reaction caused by the material settling to the bottom.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. Rotate and add materials evenly, mix them evenly with the base liquid, avoid excessive concentration in local reaction, and improve reaction yield; 2. The driving and limiting operations are convenient. The stirring motor can drive the feeding ring to rotate synchronously, and can separate the connecting rod from the stirring shaft after the dropwise addition is completed, making it easier for the stirring shaft to continue stirring. 3. The feeding ring can be adjusted to add the drip height and reduce the material sinking to the bottom. First lower the position of the fixed ring and then gradually raise the height to allow the material to fully react. When the stirring shaft is stirring, the scraper can reduce the material sinking to the bottom. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the three-dimensional structure of this application.

[0028] Figure 2 It is a schematic diagram of the three-dimensional structure inside the reactor of the present application.

[0029] Figure 3 It is a schematic diagram of the cross-sectional structure of the feeding ring and the fixing ring of the present application along the radial direction.

[0030] Figure 4 It is a schematic diagram of a partial three-dimensional structure of the top wall of the reactor of the present application, mainly used to show the positional relationship of the limiting components.

[0031] Figure 5 It is a schematic diagram of the three-dimensional structure of the rotating ring, the pressure ring and the abutment member of the present application.

[0032] Figure 6 It is a schematic diagram of the cross-sectional structure of the clamping member on the pressure ring of the present application.

[0033] Figure 7 It is an enlarged schematic diagram of the three-dimensional structure of part A of this application.

[0034] Those skilled in the art will appreciate that the elements in the drawings are shown for simplicity and clarity and are not necessarily drawn to scale. For example, the size and position of some elements in the drawings may be exaggerated relative to other elements to help improve understanding of the embodiments of the present invention.

[0035] Figure numerals: 1, reactor; 11, feeding ring; 111, ring groove; 112, feeding hole; 12, fixing ring; 121, feeding pipe; 13, screw rod; 14, driving motor; 15, slide rod; 16, sliding frame; 2, rotating member; 21, connecting rod; 22, ball; 3, stirring assembly; 31, stirring shaft; 311, scraper; 312, limiting groove; 313, connecting groove; 314, positioning column; 32, stirring blade; 33, stirring motor; 34, second gear; 35, first gear; 4, limiting assembly; 41, rotating ring; 411, guide column; 42, Pressing ring; 421, guide sleeve; 422, guide spring; 423, abutment groove; 424, retaining ring; 425, second magnet; 5, clamping member; 51, first abutment block; 511, first connecting column; 52, second abutment block; 53, rotating rod; 531, sliding groove; 54, tensioning spring; 55, abutment column; 6, abutment member; 61, abutment ring; 62, first magnet; 63, vertical bracket; 7, positioning member; 71, positioning sleeve; 711, slot; 72, positioning spring; 73, connecting sleeve; 731, positioning groove; 74, positioning protrusion; 75, pushing spring. DETAILED DESCRIPTION

[0036] The present application is further described in detail below with reference to the accompanying drawings.

[0037] The present application embodiment discloses a uniform feeding device for a Grignard reactor 1, referring to Figure 1 、 Figure 2 and Figure 3 , a feeding ring 11, a fixed ring 12, a rotating member 2 and a stirring assembly 3, the fixed ring 12 is horizontally arranged in the reactor 1 and is coaxially distributed with the reactor 1, the feeding ring 11 is rotatably mounted on one side of the inner peripheral wall of the fixed ring 12, an annular ring groove 111 is provided on the upward side surface of the feeding ring 11, a plurality of feeding holes 112 connected to the ring groove 111 are provided at the bottom of the feeding ring 11, and the plurality of feeding holes 112 are evenly spaced along the circumferential direction of the feeding ring 11, a feeding pipe 121 connected to an external feeding pump is provided on the fixed ring 12, and one end of the feeding pipe 121 is connected to the ring groove 1 11 is connected, a stirring component 3 for stirring materials is provided in the reactor 1, and a rotating part 2 is provided in the reactor 1 and connected to the stirring component 3. Before the reaction, the bottom liquid is added to the reactor 1, and the feeding pump feeds the material into the annular groove 111 of the feeding ring 11 through the feeding pipe 121, and the material is discharged through the feeding hole 112 at the bottom of the feeding ring 11. When the stirring component 3 drives the stirring, the rotating part 2 drives the feeding ring 11 to rotate, realizing rotary feeding for dropwise addition reaction, and rotating feeding and feeding are uniform, so that the raw materials and the bottom liquid are evenly mixed, reducing the problem of low yield caused by excessive local reaction concentration.

[0038] Reference Figure 1 and Figure 2A screw rod 13 is rotatably installed on the outside of the reactor 1. The screw rod 13 and the axis of the reactor 1 are parallel to each other. A drive motor 14 is provided on the outside of the reactor 1. The screw rod 13 is connected to the output shaft of the drive motor 14. A slide rod 15 is vertically slidably installed on the top of the reactor 1. One end of the slide rod 15 is located on the outside of the reactor 1. A slide frame 16 is slidably installed on the outside of the reactor 1 along the vertical direction. A guide rod parallel to the screw rod 13 is provided on the outside of the reactor 1. The slide frame 16 is slidably connected to the guide rod. The slide frame 16 is threadedly connected to the screw rod 13. The upper end of the slide rod 15 is connected to the slide frame 16. The end of the slide rod 15 away from the slide frame 16 is located in the reactor 1 and is connected to the upper side of the fixing ring 12. The driving motor 14 drives the screw rod 13 to rotate, and the screw rod 13 drives the sliding frame 16 to slide along the axial direction of the reactor 1. The sliding frame 16 drives the fixed ring 12 to move through the slide rod 15, thereby adjusting the dripping height of the feeding ring 11. During the reaction, the dripping height of the feeding ring 11 always maintains a certain height with the liquid level, reducing the problem of a high height during the initial reaction dripping, resulting in splashing and thus reducing the reaction efficiency.

[0039] Reference Figure 1 and Figure 2 The stirring assembly 3 includes a stirring shaft 31 and stirring blades 32. The stirring shaft 31 is rotatably mounted within the reactor 1 and distributed along the axis of the reactor 1. The stirring blades 32 are disposed on the outer peripheral wall of the stirring shaft 31. Five groups of stirring blades 32 are provided and are staggered and spaced in an upward and downward manner. A stirring motor 33 is disposed on the top of the reactor 1. A second gear 34 is coaxially fixedly connected to the stirring shaft 31. The stirring motor 33 is coaxially connected to a first gear 35, which meshes with one side of the second gear 34. The stirring motor 33 drives the first gear 35 to rotate. The first gear 35 drives the meshed second gear 34 to rotate, thereby driving the stirring shaft 31 to rotate, driving the stirring blades 32 to rotate to stir the reaction.

[0040] Reference Figure 2 A scraper 311 is provided at the bottom of the stirring shaft 31. One side of the scraper 311 is in contact with the bottom and the side of the downward portion of the side wall of the reactor 1. When the stirring shaft 31 is stirred, the scraper 311 stirs the material at the bottom of the reactor 1, reducing the problem of insufficient reaction caused by the material settling to the bottom.

[0041] Reference Figure 3 The rotating member 2 includes a connecting rod 21 and a ball bearing 22. The connecting rod 21 is horizontally arranged on one side of the inner circumferential wall of the feeding ring 11. The ball bearing 22 is rotatably mounted on the end of the connecting rod 21 facing away from the feeding ring 11. The outer circumferential wall of the stirring shaft 31 is provided with two oppositely distributed and mutually parallel limiting grooves 312. The limiting grooves 312 are distributed along the length of the stirring shaft 31. The ball bearing 22 is in rolling connection with the stirring shaft 31 through the limiting grooves 312. When the stirring shaft 31 rotates, the limiting grooves 312 drive the feeding ring 11 to rotate synchronously through the connecting rod 21 via the ball bearing 22.

[0042] Reference Figure 4 A connecting groove 313 connected to the limiting groove 312 is provided on the stirring shaft 31 and at the upward end of the limiting groove 312. The connecting groove 313 is annular and distributed along the outer peripheral wall of the stirring shaft 31. When the connecting rod 21 moves to the connecting groove 313, the ball 22 rolls in the connecting groove 313, separating the connecting rod 21 from the stirring shaft 31.

[0043] Reference Figure 4 A limiting assembly 4 is provided in the reactor 1. The limiting assembly 4 includes a rotating ring 41 and a pressure ring 42. The rotating ring 41 is rotatably mounted on the top wall of the reactor 1 and is coaxially distributed with the stirring shaft 31. The pressure ring 42 is arranged on the downward side of the rotating ring 41. A guide sleeve 421 is vertically provided on the upward side of the pressure ring 42. A guide column 411 is vertically provided on the downward side of the rotating ring 41. The guide column 411 is slidably mounted on the guide sleeve 421. A guide spring 422 is provided on the outer side of the guide sleeve 421. The two ends of the guide spring 422 are respectively connected to the rotating ring 41 and the pressure ring 42.

[0044] Reference Figure 5 and Figure 6 , a clamping member 5 is provided on the pressure ring 42, and the clamping member 5 includes a first abutting block 51 and a second abutting block 52. The first abutting block 51 and the second abutting block 52 are both slidably installed on the pressure ring 42 in the vertical direction, and the first abutting block 51 and the second abutting block 52 are relatively distributed. The first abutting block 51 and the second abutting block 52 are located on the opposite side and are both provided with a downward inclined cut angle. A rotating rod 53 is rotatably installed on the pressure ring 42, and the two ends of the rotating rod 53 in the length direction are respectively provided with relatively distributed sliding grooves 531. The sliding grooves 531 are distributed along the length direction of the rotating rod 53. The first abutting block 51 is provided with a second abutting block 52. A connecting column 511, the first connecting column 511 is slidingly connected to one side of the rotating rod 53 through a sliding groove 531, and a second connecting column is provided on the second abutting block 52, and the second connecting column is slidingly connected to the other side of the rotating rod 53 through another sliding groove 531. A tensioning spring 54 is provided on the pressure ring 42, and one end of the tensioning spring 54 is connected to the side of the rotating rod 53 toward the first abutting block 51. The first abutting block 51 is provided with a vertical abutting column 55 at the lower side of the pressure ring 42, and an abutting groove 423 is provided on the lower side of the pressure ring 42, and the abutting column 55 is abutted and connected with one side of the pressure ring 42 through the abutting groove 423.

[0045] When one end of the connecting rod 21 rotates to the side of the first abutment block 51, the connecting rod 21 pushes the angled side of the first abutment block 51 and then pushes the first abutment block 51 to slide in the vertical direction, thereby pushing the rotating rod 53 to rotate and drive the second abutment block 52 on the other side to slide. At the same time, the abutment column 55 on the first abutment block 51 abuts and limits the abutment groove 423 of the pressure ring 42. The angled sides of the first abutment block 51 and the second abutment block 52 synchronously limit the two sides of the outer peripheral wall of the connecting rod 21. At the same time, when the feeding ring 11 rises, the first abutment block 51 and the second abutment block 52 are pushed tightly against the connecting rod 21.

[0046] Reference Figure 5 , an abutment 6 is provided in the reactor 1, and the abutment 6 includes an abutment ring 61 and a first magnet 62 arranged on the upper side of the pressure ring 42. The abutment ring 61 is arranged in the reactor 1 through a vertical bracket 63 and is coaxially distributed with the pressure ring 42. The first magnet 62 is arranged on the outer peripheral wall of the abutment ring 61, and a retaining ring 424 is coaxially provided on the outer peripheral wall of the pressure ring 42 and located on the upper side. A second magnet 425 is provided on the outer peripheral wall of the retaining ring 424. When the pressure ring 42 moves to the point where the retaining ring 424 abuts against one side of the abutment ring 61, the first magnet 62 and the second magnet 425 are magnetically connected, and the pressure ring 42 and the abutment ring 61 are fixed and limited. At this time, the position of the connecting rod 21 is fixed, and the feeding ring 11 stops rotating.

[0047] Reference Figure 4 and Figure 7 A horizontal positioning column 314 is provided at the top of the stirring shaft 31 and on the upper side of the first gear 35. The positioning column 314 and the axis of the stirring shaft 31 are perpendicular to each other. A positioning member 7 is slidably installed on the reactor 1. The positioning member 7 includes a positioning sleeve 71 and a positioning spring 72. A horizontal connecting sleeve 73 is provided on the reactor 1. The connecting sleeve 73 is connected to the top of the vertical bracket 63. The connecting sleeve 73 is distributed along the radial direction of the stirring shaft 31. The positioning sleeve 71 is slidably installed at the connecting sleeve 73 and extends along the length of the connecting sleeve 73. The positioning sleeve 71 is provided with a positioning protrusion 74 installed for sliding in the vertical direction and a pushing spring 75 for pushing the positioning protrusion 74 to slide. The connecting sleeve 73 is provided with a positioning groove 731. The positioning protrusion 74 is connected to the connecting sleeve 73 by a clamping connection through the positioning groove 731. The positioning sleeve 71 is provided with a slot 711 at one end facing the positioning column 314. One end of the positioning column 314 is plugged into the positioning sleeve 71 through the slot 711.

[0048] When the reaction is completed and the feeding ring 11 needs to be moved back to the lower position inside the reactor 1, the positioning column 314 drives the stirring shaft 31 to rotate until the positioning column 314 is located at one end of the positioning sleeve 71, and the positioning sleeve 71 is pulled to slide to one end of the positioning column 314 and plugged into the slot 711 of the positioning sleeve 71. At this time, the push spring 75 pushes the positioning protrusion 74 to be clamped in the positioning groove 731 of the connecting sleeve 73, positioning the limit groove 312 on the stirring shaft 31 and the position of the connecting rod 21. At this time, the driving fixed ring 12 drives the connecting rod 21 on the feeding ring 11 to move along the limit groove 312, which is convenient for the next feeding reaction.

[0049] The implementation principle of the uniform feeding device of the Grignard reactor in the embodiment of the present application is as follows: before the reaction, the bottom liquid is first added to the reactor 1. During the reaction, the feeding pump feeds the material into the annular groove 111 of the feeding ring 11 through the feeding pipe 121, and discharges the material through the feeding hole 112 at the bottom of the feeding ring 11.

[0050] Before the reaction, the driving motor 14 drives the screw 13 to rotate and drive the sliding frame 16 to slide, thereby driving the fixed ring 12 to move to a lower position inside the reactor 1. At this time, the stirring motor 33 drives the stirring shaft 31 to rotate to drive stirring. The rotating shaft drives the feeding ring 11 to rotate through the connecting rod 21, realizing rotating feeding for dropwise addition reaction. At the same time, the fixed ring 12 is synchronously driven to drive the feeding ring 11 to gradually rise, and the ball 22 at one end of the connecting rod 21 moves along the limit groove 312 of the stirring shaft 31.

[0051] When the connecting rod 21 drives the ball 22 to move to the lower side of the connecting groove 313, the connecting rod 21 pushes the first abutment block 51 and then drives the pressure ring 42 to rotate synchronously. The first abutment block 51 drives the second abutment block 52 to limit and tighten the connecting rod 21. At the same time, the connecting rod 21 is still moving to push the pressure ring 42 to move upward. When the ball 22 at one end of the connecting rod 21 moves to the connecting groove 313, the outer screw 13 stops rotating, the position of the fixed ring 12 is fixed, the retaining ring 424 on one side of the pressure ring 42 abuts against one side of the abutment ring 61, and the first magnet 62 and the second magnet 425 are magnetically attracted. At this time, the connecting rod 21 is fixed and the position of the feeding ring 11 is fixed, and the stirring shaft 31 continues to stir the reaction.

[0052] When the reaction is completed, the material in the reactor 1 is discharged, and it is ready for the next reaction, the positioning column 314 is rotated to one end of the positioning sleeve 71, and the positioning sleeve 71 is slid to one end of the positioning column 314 and plugged into the slot 711. At this time, the positioning protrusion 74 limits the positioning sleeve 71, and the driving fixing ring 12 drives the connecting rod 21 and the ball 22 on the feeding ring 11 to move downward along the limiting groove 312. When the connecting rod 21 is separated from the pressure ring 42, the guide spring 422 on one side of the pressure ring 42 pushes the pressure ring 42 to separate between the first magnet 62 and the second magnet 425, and then drives the pressure ring 42 to move downward to reset, disengage the positioning sleeve 71 from the positioning column 314, and then the next stirring operation can be started.

[0053] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A uniform feeding device for a Grignard reactor, comprising a feeding ring (11), a fixed ring (12) and a rotating member (2), wherein the fixed ring (12) is arranged in the reactor (1), and is characterized in that: The feeding ring (11) is rotatably mounted on the fixed ring (12); an annular groove (111) is provided on the feeding ring (11); a plurality of feeding holes (112) connected to the annular groove (111) are provided at the bottom of the feeding ring (11); a feeding pipe (121) connected to an external feeding pump is provided on the fixed ring (12); one end of the feeding pipe (121) is connected to the annular groove (111); a stirring assembly (3) for stirring materials is provided in the reactor (1); the rotating member (2) is provided in the reactor (1) and connected to the stirring assembly (3); when the stirring assembly (3) drives stirring, the rotating member (2) drives the feeding ring (11) to rotate.

2. The uniform feeding device for a Grignard reactor according to claim 1, characterized in that: The stirring assembly (3) includes a stirring shaft (31) and stirring blades (32), wherein the stirring shaft (31) is rotatably mounted in the reactor (1) and distributed along the axis of the reactor (1), and the stirring blades (32) are arranged on the outer peripheral wall of the stirring shaft (31). A stirring motor (33) for driving the stirring shaft (31) to rotate is arranged on the top of the reactor (1), and the rotating member (2) includes a connecting rod (21) and a ball (22), wherein the connecting rod (21) is arranged on one side of the feeding ring (11), and the ball (22) is rotatably mounted on one end of the connecting rod (21). A limiting groove (312) is provided on the stirring shaft (31), and the ball (22) is rollingly connected to the stirring shaft (31) through the limiting groove (312).

3. The uniform feeding device for a Grignard reactor according to claim 1, characterized in that: A screw rod (13) is rotatably mounted on the outside of the reactor (1), and the axis of the screw rod (13) and the axis of the reactor (1) are parallel to each other. A slide rod (15) is slidably mounted on the reactor (1), and a slide frame (16) is slidably mounted on the outside of the reactor (1). The slide frame (16) is threadedly connected to the screw rod (13), and one end of the slide rod (15) is connected to the slide frame (16). The end of the slide rod (15) facing away from the slide frame (16) is located in the reactor (1) and is connected to a side surface of the fixing ring (12). A driving motor (14) for driving the screw rod (13) to rotate is arranged on the outside of the reactor (1).

4. The uniform feeding device for a Grignard reactor according to claim 2, characterized in that: An annular connecting groove (313) is provided on the stirring shaft (31), the connecting groove (313) is distributed along the outer peripheral wall of the stirring shaft (31) and is connected to the upward end of the limiting groove (312), the limiting groove (312) is distributed along the length direction of the stirring shaft (31), and a limiting component (4) for limiting the connecting rod (21) is provided in the reactor (1) and located on the upper side of the limiting groove (312).

5. The uniform feeding device for a Grignard reactor according to claim 4, characterized in that: The limiting assembly (4) includes a rotating ring (41) and a pressure ring (42), wherein the rotating ring (41) is rotatably mounted on the top wall of the reactor (1) and is coaxially distributed with the stirring shaft (31), and the pressure ring (42) is arranged on the downward side of the rotating ring (41), and the pressure ring (42) and the rotating ring (41) are slidingly connected along the axial direction of the stirring shaft (31), and a clamping member (5) for limiting the connection rod (21) is provided on the pressure ring (42), and an abutment member (6) for limiting the pressure ring (42) is provided in the reactor (1).

6. The uniform feeding device for a Grignard reactor according to claim 5, characterized in that: The clamping member (5) includes a first abutting block (51) and a second abutting block (52), the first abutting block (51) and the second abutting block (52) are both slidably mounted on the pressure ring (42), a rotating rod (53) is rotatably mounted on the pressure ring (42), and both ends of the rotating rod (53) are slidably connected to the first abutting block (51) and the second abutting block (52), respectively, a tensioning spring (54) is provided on the pressure ring (42), one end of the tensioning spring (54) is connected to the side of the rotating rod (53) facing the first abutting block (51), an abutting column (55) is provided on the first abutting block (51) and located on the lower side of the pressure ring (42), an abutting groove (423) is provided on the pressure ring (42), and the abutting column (55) is abutted and connected to one side of the pressure ring (42) through the abutting groove (423).

7. The uniform feeding device for a Grignard reactor according to claim 5, characterized in that: The abutment member (6) includes an abutment ring (61) and a first magnet (62). The abutment ring (61) is arranged in the reactor (1) and is coaxially distributed with the pressure ring (42). The first magnet (62) is arranged on the outer peripheral wall of the abutment ring (61). A retaining ring (424) is coaxially arranged on the outer peripheral wall of the pressure ring (42). A second magnet (425) is arranged on the outer peripheral wall of the retaining ring (424). When the pressure ring (42) moves to the point where the retaining ring (424) abuts against one side of the abutment ring (61), the first magnet (62) and the second magnet (425) are magnetically connected.

8. The uniform feeding device for a Grignard reactor according to claim 2, characterized in that: A positioning column (314) is provided on the top of the stirring shaft (31), and the positioning column (314) and the axis of the stirring shaft (31) are perpendicular to each other. A positioning member (7) for limiting and positioning one end of the positioning column (314) is slidably installed on the reactor (1). When the positioning column (314) is limited, the connecting rod (21) is located at the limiting groove (312).

9. The uniform feeding device for a Grignard reactor according to claim 8, characterized in that: The positioning member (7) includes a positioning sleeve (71) and a positioning spring (72). The reactor (1) is provided with a connecting sleeve (73). The positioning sleeve (71) is slidably installed in the connecting sleeve (73) along a direction toward or away from the positioning column (314). The positioning spring (72) is provided on the connecting sleeve (73) and connected to the positioning sleeve (71). The positioning sleeve (71) is provided with a slidably installed positioning protrusion (74) and a pushing spring (75) for pushing the positioning protrusion (74) to slide. The connecting sleeve (73) is provided with a positioning groove (731). The positioning protrusion (74) is connected to the connecting sleeve (73) by clamping through the positioning groove (731). One end of the positioning sleeve (71) is provided with a slot (711). One end of the positioning column (314) is plug-connected to the positioning sleeve (71) through the slot (711).

10. The uniform feeding device for a Grignard reactor according to claim 2, characterized in that: A scraper (311) is provided at the bottom of the stirring shaft (31), and one side of the scraper (311) is in contact with the side edge of the bottom of the reactor (1).

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