CN214915383U

CN214915383U - Circulation dispersion devices is used in waterborne polyurethane production

Info

Publication number: CN214915383U
Application number: CN202121549967.7U
Authority: CN
Inventors: 韩波
Original assignee: Zhenjiang Desheng New Material Technology Co Ltd
Current assignee: Zhenjiang Desheng New Material Technology Co Ltd
Priority date: 2021-07-08
Filing date: 2021-07-08
Publication date: 2021-11-30
Anticipated expiration: 2031-07-08

Abstract

The utility model relates to a waterborne polyurethane production is with circulation dispersion devices, which comprises a tank body, the deconcentrator of the internal pivot of jar includes the dispersion impeller, a plurality of dispersion tooth group and arc stirring leaf, the internal blender that is equipped with of jar, the blender includes the upper cover, negative pressure cover and lower cover, the upper cover bottom extends to the negative pressure cover inside and be hopper-shaped structure, be equipped with the feed port with the circulating pipe intercommunication in the upper cover, be equipped with the negative pressure chamber in the negative pressure cover, negative pressure cover one side is equipped with the by-pass hole with the circulating pipe intercommunication, be equipped with the gradual shrinkage mouth in the lower cover, the mixing hole of vertical setting, the diffusion mouth, the mixture material stream that gets into the feed port pressurizes down in the upper cover effect that the bottom is hopper-shaped gets into the negative pressure intracavity, mix with the mixture material stream that the by-pass hole flowed into the negative pressure chamber perpendicularly by force, through the gradual shrinkage mouth, the mixing hole, the high-speed blowout of diffusion mouth mixes the recirculation with the mixture material stream in the jar, through rotatory deconcentrator, The double action of the circulating material flow entering the mixer enhances the homogenizing effect and the dispersing efficiency of the waterborne polyurethane.

Description

Circulation dispersion devices is used in waterborne polyurethane production

Technical Field

The utility model relates to a water-borne polyurethane production is with circulation dispersion devices belongs to water-borne polyurethane production facility technical field.

Background

The aquosity of polyurethane resin has gradually replaced solvent type, which becomes an important direction of the development of polyurethane industry, and is widely applied to coatings, adhesives, especially leather finishing agents, the aquosity polyurethane can be divided into polyether type, polyester type, polyether and polyester mixed type according to different synthetic monomers, and the aquosity polyurethane can be divided into aromatic type and aliphatic type according to the difference of selected diisocyanate, or specifically, the aquosity polyurethane can be divided into TDI type, HDI type and the like. In the production process of the waterborne polyurethane, oligomer diol, waterborne monomer and the like are dispersed in a solvent so as to be polymerized step by step or a neutralized prepolymer is dispersed in water, a tank body structure with a rotary disperser is adopted in the prior art, the dispersion is carried out under the stirring action of the high-speed rotary disperser, and a material at the bottom of a tank can be pumped into the top of the tank through a circulating pump on a circulating pipe, so that the dispersion efficiency is improved through external circulation, however, the circulating structure for directly pumping only increases partial turbulence, the collision efficiency on the continuous feeding or the components in the circulating material flow is lower, the strong homogeneous effect is difficult to achieve or the efficiency is lower, and the requirement of batch production cannot be met.

SUMMERY OF THE UTILITY MODEL

The utility model aims at prior art's defect, provide a waterborne polyurethane production is with circulation dispersion devices, flow through rotatory deconcentrator, circulation material and get into blender dual function and strengthen waterborne polyurethane homogeneity effect and dispersion efficiency.

The utility model discloses a realize through following technical scheme:

a circulating dispersion device for producing waterborne polyurethane comprises a tank body, wherein the top of the tank body is provided with at least one feed inlet, the tank body is internally provided with a rotating shaft and at least one disperser coaxially connected with the rotating shaft, the bottom of the tank body is provided with a discharge pipe connected with a circulating pipe, and the circulating pipe is provided with a circulating pump;

the top of the upper sleeve is fixed with the tank body, the bottom of the upper sleeve extends into the negative pressure sleeve and is of a bucket-shaped structure, a feeding hole communicated with the circulating pipe is formed in the upper sleeve, a negative pressure cavity is formed in the negative pressure sleeve, a bypass hole communicated with the negative pressure cavity and the circulating pipe and perpendicular to the feeding hole is formed in one side of the negative pressure sleeve, a gradually-shrinking port located at the bottom of the negative pressure cavity, a mixing hole communicated with the gradually-shrinking port and vertically formed, and a diffusion port communicated with the bottom of the mixing hole and the tank body are formed in the lower sleeve, supporting plates which are arranged around the negative pressure sleeve at intervals and are in clearance fit with the outer wall of the bottom of the upper sleeve are arranged in the negative pressure cavity, and the gradually-shrinking port and the diffusion port are of circular table-shaped structures which are arranged oppositely;

the circulating pipe comprises a first pipe body connected with the discharge pipe and the circulating pump, a second pipe body connected with the circulating pump and the upper sleeve, and a third pipe body communicated with the second pipe body and the bypass hole, wherein the second pipe body is connected with a material supplementing pipe, stop valves are arranged on the material supplementing pipe, the second pipe body, the first pipe body and the discharge pipe, and the stop valve on the second pipe body is positioned between the material supplementing pipe and the third pipe body;

the dispersion impeller is provided with a plurality of notches arranged at intervals, the dispersion tooth group and the arc-shaped stirring blades are respectively positioned on two sides of each notch, and the dispersion tooth group comprises a plurality of upper teeth and lower teeth which are arranged at intervals in sequence and are vertically or obliquely connected with the dispersion impeller.

The utility model has the advantages that:

(1) when the rotating shaft drives the dispersion disc to rotate in the tank body, the dispersion tooth groups are provided with a plurality of upper teeth and lower teeth which are sequentially arranged at intervals and are vertical to or obliquely connected with the dispersion disc to rotate so as to play a role of strong shearing, the arc-shaped stirring blades rotate to guide flow and strengthen mixed flow, and the dispersion efficiency is improved;

(2) the mixture flow in the tank body is sent into a feed hole and a bypass hole of a mixer from a discharge pipe, a first pipe body and a circulating pump through a second pipe body and a third pipe body shunt pump which are connected, the mixture flow entering the feed hole is pressurized under the action of an upper sleeve with a hopper-shaped bottom and enters a negative pressure cavity, is vertically and strongly mixed with the mixture flow flowing into the negative pressure cavity from the bypass hole, is pressurized by a reducing port and is converged into a vertical mixing hole at a high speed, is sprayed out at a high speed through a diffusion port and is mixed with the mixture flow in the tank body, and the mass transfer efficiency of mixing, dispersion and collision is enhanced by the repeated circulation action;

(3) the raw materials produced by the waterborne polyurethane are fed into the feeding hole through the material supplementing pipe and are collided and mixed with the mixture material flow entering the bypass hole at a high speed, and in conclusion, the homogenizing effect and the dispersing efficiency of the waterborne polyurethane are enhanced through the double effects of the rotary disperser and the circulating material flow entering the mixer.

Drawings

Fig. 1 is a structural diagram of the present invention.

Fig. 2 is a top perspective view of the disperser of the present invention.

Fig. 3 is a bottom perspective view of the disperser of the present invention.

Fig. 4 is a perspective view of the upper sleeve and the negative pressure sleeve of the present invention.

The labels in the figure are: the device comprises a tank body 1, a feeding hole 2, a rotating shaft 3, a disperser 4, a discharging pipe 5, a circulating pipe 6, a circulating pump 7, a dispersing disc 41, a dispersing tooth group 42, an arc-shaped stirring blade 43, a mixer 8, an upper sleeve 81, a negative pressure sleeve 82, a lower sleeve 83, a feeding hole 9, a negative pressure cavity 10, a bypass hole 11, a tapered opening 12, a mixing hole 13, a diffusion opening 14, a supporting plate 15, a flange 16, a supporting ring 17, a positioning column 18, a first pipe body 61, a second pipe body 62, a third pipe body 63, a material supplementing pipe 19, a stop valve 20, a servo motor 21, a baffle plate 22, a jacket 23, a temperature detection rod 24, a notch 25, an upper tooth 421 and a lower tooth 422.

Detailed Description

The following describes the present invention with reference to the accompanying drawings.

A circulating dispersion device for producing waterborne polyurethane comprises a tank body 1, wherein the top of the tank body 1 is provided with at least one feed inlet 2, a rotating shaft 3 and at least one disperser 4 coaxially connected with the rotating shaft 3 are arranged in the tank body 1, the bottom of the tank body 1 is provided with a discharge pipe 5, the discharge pipe 5 is connected with a circulating pipe 6, the circulating pipe 6 is provided with a circulating pump 7, the disperser 4 comprises a dispersion disc 41, a plurality of dispersion tooth groups 42 and arc-shaped stirring blades 43, a mixer 8 positioned on one side of the rotating shaft 3 is arranged in the tank body 1, and the mixer 8 comprises an upper sleeve 81, a negative pressure sleeve 82 and a lower sleeve 83 which are sequentially connected from top to bottom;

the top of the upper sleeve 81 is fixed with the tank body 1, the bottom of the upper sleeve 81 extends into the negative pressure sleeve 82 and is of a hopper-shaped structure, a feed hole 9 communicated with the circulating pipe 6 is arranged in the upper sleeve 81, a negative pressure cavity 10 is arranged in the negative pressure sleeve 82, a bypass hole 11 communicated with the negative pressure cavity 10 and the circulating pipe 6 and perpendicular to the feed hole 9 is arranged at one side of the negative pressure sleeve 82, a tapered port 12 positioned at the bottom of the negative pressure cavity 10, a mixing hole 13 communicated with the tapered port 12 and vertically arranged, and a diffusion port 14 communicated with the bottom of the mixing hole 13 and the tank body 1 are arranged in the lower sleeve 83, a support plate 15 arranged at intervals around the negative pressure sleeve 82 and with a side wall in clearance fit with the outer wall of the bottom of the upper sleeve 81 is arranged in the negative pressure cavity 10, and the tapered port 12 and the diffusion port 14 are of a circular table-shaped structure arranged oppositely;

the top and the side of the upper sleeve 81, the top and the bottom of the negative pressure sleeve 82 and the top and the bottom of the lower sleeve 83 are respectively provided with a flange 16, the flange 16 at the top of the upper sleeve 81 is fixedly connected with the top of the tank body 1, the flanges 16 at the top and the bottom of the negative pressure sleeve 82 are respectively connected with the upper sleeve 81 and the lower sleeve 83, the side wall of the tank body 1 is provided with a support ring 17, and the support ring 17 is provided with a positioning column 18 correspondingly penetrating through the flange 16 at the bottom of the lower sleeve 83;

the circulating pipe 6 comprises a first pipe body 61 connected with the discharge pipe 5 and the circulating pump 7, a second pipe body 62 connected with the circulating pump 7 and the upper sleeve 81, and a third pipe body 63 communicated with the second pipe body 62 and the bypass hole 11, the second pipe body 62 is connected with the material supplementing pipe 19, stop valves 20 are arranged on the material supplementing pipe 19, the second pipe body 62, the first pipe body 61 and the discharge pipe 5, and the stop valve 20 on the second pipe body 62 is positioned between the material supplementing pipe 19 and the third pipe body 63;

a servo motor 21 is arranged at the top of the tank body 1, a motor shaft of the servo motor 21 is coaxially connected with the rotating shaft 3, a plurality of baffles 22 are arranged on the inner wall of the tank body 1 at intervals around the tank body 1, a jacket 23 is arranged outside the tank body 1, and a temperature detection rod 24 with the end part arranged in the tank body 1 is arranged on the tank body 1;

be equipped with a plurality of intervals on dispersion impeller 41 and set up notch 25, dispersion tooth group 42 and arc stirring leaf 43 are located notch 25 both sides respectively, dispersion tooth group 42 includes a plurality of interval settings in proper order and the last tooth 421 and the lower tooth 422 that link to each other with dispersion impeller 41 is perpendicular or slope.

The utility model discloses a theory of operation does:

referring to the attached drawings, a feed inlet 2 feeds a production raw material of waterborne polyurethane into a tank body 1, heat conducting oil is introduced into a jacket 23 for system heat preservation, and a temperature detection rod 24 detects the internal temperature, a motor shaft of a servo motor 21 drives a rotating shaft 3 to drive a dispersion disc 41 to rotate in the tank body 1, the dispersion disc 41 is provided with a plurality of dispersion tooth groups 42 and arc-shaped stirring blades 43 through a plurality of notches 25, so that a plurality of upper teeth 421 and lower teeth 422 which are sequentially arranged at intervals and are vertical or obliquely connected with the dispersion disc 41 rotate along with the dispersion disc 41 to play a strong shearing role, the arc-shaped stirring blades 43 rotate along with the dispersion disc 41 to guide and strengthen mixed flow and act with a plurality of baffle plates 22 arranged at intervals on the inner wall of the tank body 1 to strengthen mixed flow and avoid the material flow close to the rotating shaft 3 from sinking to reduce the effective volume;

an upper sleeve 81 of the mixer 8 is fixed with the top of the tank body 1 through a flange 16, the bottom of the upper sleeve 81 extends into a negative pressure cavity 10 of a negative pressure sleeve 82 and is provided with a plurality of supporting plates 15 which are arranged at intervals and are in clearance fit with each other to ensure supporting stability and reduce the impact vibration effect of material flow to a bypass hole 11 on the upper sleeve 81, the upper sleeve 81 and the negative pressure sleeve 82, the negative pressure sleeve 82 and a lower sleeve 83 are fixedly connected in sequence through the flange 16, and positioning is realized by a positioning column 18 of a supporting ring 17 on the side wall of the tank body 1 penetrating through the flange 16 at the bottom of the lower sleeve 83 to ensure the installation of the mixer 8;

the stop valves 20 of the discharge pipe 5 and the feed supplement pipe 19 are closed, the stop valves 20 on the first pipe body 61 and the second pipe body 62 are opened, the circulating pump 7 is started, the mixture in the tank body 1 flows from the discharge pipe 5 to the first pipe body 61, the circulating pump 7 is delivered into a feed hole 9 and a bypass hole 11 of the mixer 8 by a shunting pump of a second pipe body 62 and a third pipe body 63 which are connected, a mixture material flow entering the feed hole 9 is pressurized under the action of an upper sleeve 81 with a hopper-shaped bottom and enters a negative pressure cavity 10 and is vertically and strongly mixed with the mixture material flow flowing into the negative pressure cavity 10 from the bypass hole 11, a tapered port 12 and a diffusion port 14 are in a circular platform-shaped structure which are oppositely arranged, the strongly-mixed material flows through the tapered port 12 of the inverted circular platform-shaped structure, is pressurized and is converged into a vertical mixing hole 13 at a high speed, is sprayed out at a high speed through the diffusion port 14 of the circular platform-shaped structure and is mixed with the mixture material flow in the tank body 1, and the mass transfer efficiency of mixing, dispersion and collision is enhanced by the repeated circulation;

the stop valve 20 on the second pipe body 62 is closed, the stop valve 20 on the feed supplementing pipe 19 is opened, raw materials for producing the waterborne polyurethane can be fed into the feed port 9 through the feed supplementing pipe 19, and the raw materials and the mixture entering the bypass port 11 are collided and mixed at a high speed, the homogenizing efficiency is improved, the homogenizing effect and the dispersive mass transfer efficiency are enhanced through the double effects of the rotary disperser 4 and the circulating material flow entering the mixer 8, the stop valve 20 and the circulating pump 7 on the first pipe body 61 of the circulating pipe 6 are closed after the dispersion is finished, the stop valve 20 on the discharge pipe 5 is opened, and the waterborne polyurethane dispersion system flows out of the tank body 1.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A circulating dispersion device for production of waterborne polyurethane comprises a tank body (1), wherein the top of the tank body (1) is provided with at least one feed inlet (2), a rotating shaft (3) and at least one disperser (4) coaxially connected with the rotating shaft (3) are arranged in the tank body (1), the bottom of the tank body (1) is provided with a discharge pipe (5), the discharge pipe (5) is connected with a circulating pipe (6), and the circulating pipe (6) is provided with a circulating pump (7), and the circulating dispersion device is characterized in that the disperser (4) comprises a dispersion disc (41), a plurality of dispersion tooth groups (42) and arc-shaped stirring blades (43), a mixer (8) positioned on one side of the rotating shaft (3) is arranged in the tank body (1), and the mixer (8) comprises an upper sleeve (81), a negative pressure sleeve (82) and a lower sleeve (83) which are sequentially connected from top to bottom;

go up cover (81) top and jar body (1) fixed, go up cover (81) bottom and extend to inside and be hopper-shaped structure of negative pressure cover (82), go up and be equipped with feed port (9) with circulating pipe (6) intercommunication in cover (81), be equipped with negative pressure chamber (10) in negative pressure cover (82), negative pressure cover (82) one side is equipped with bypass hole (11) that communicate and perpendicular feed port (9) with negative pressure chamber (10) and circulating pipe (6), be equipped with gradually reduced mouth (12) that are located negative pressure chamber (10) bottom in lower cover (83), with gradually reduced mouth (12) intercommunication and vertical mixing hole (13) that set up, with diffusion mouth (14) of mixing hole (13) bottom and jar body (1) intercommunication.

2. The circulation dispersion device for the production of the waterborne polyurethane as claimed in claim 1, wherein the circulation pipe (6) comprises a first pipe body (61) connected with the discharge pipe (5) and the circulation pump (7), a second pipe body (62) connected with the circulation pump (7) and the upper sleeve (81), and a third pipe body (63) communicated with the second pipe body (62) and the bypass hole (11), the second pipe body (62) is connected with the material supplementing pipe (19), the second pipe body (62), the first pipe body (61) and the discharge pipe (5) are all provided with stop valves (20), and the stop valves (20) on the second pipe body (62) are located between the material supplementing pipe (19) and the third pipe body (63).

3. The circulating dispersion device for the production of the waterborne polyurethane as claimed in claim 1, wherein flanges (16) are arranged on the top and the side of the upper sleeve (81), the top and the bottom of the negative pressure sleeve (82), and the top and the bottom of the lower sleeve (83), the flange (16) on the top of the upper sleeve (81) is fixedly connected with the top of the tank body (1), the flanges (16) on the top and the bottom of the negative pressure sleeve (82) are respectively connected with the upper sleeve (81) and the lower sleeve (83), a support ring (17) is arranged on the side wall of the tank body (1), and positioning columns (18) correspondingly penetrating through the flanges (16) on the bottom of the lower sleeve (83) are arranged on the support ring (17).

4. The circulation and dispersion device for the production of the waterborne polyurethane as claimed in claim 1, wherein the negative pressure chamber (10) is internally provided with support plates (15) which are arranged around the negative pressure sleeve (82) at intervals and have side walls in clearance fit with the outer wall of the bottom of the upper sleeve (81), and the tapered port (12) and the diffusion port (14) are in a truncated cone-shaped structure which are arranged oppositely.

5. The circulating dispersion device for the production of the waterborne polyurethane as claimed in claim 1, wherein a servo motor (21) is arranged at the top of the tank body (1), a motor shaft of the servo motor (21) is coaxially connected with the rotating shaft (3), and a plurality of baffles (22) are arranged on the inner wall of the tank body (1) at intervals around the tank body (1).

6. The circulating and dispersing device for the production of the waterborne polyurethane as claimed in claim 1, wherein the tank body (1) is externally provided with a jacket (23), and the tank body (1) is provided with a temperature detection rod (24) the end of which is arranged in the tank body (1).

7. The circulating dispersion device for the production of the waterborne polyurethane as claimed in any one of claims 1 to 6, wherein the dispersion plate (41) is provided with a plurality of notches (25) arranged at intervals, the dispersion teeth (42) and the arc-shaped stirring blades (43) are respectively located at two sides of the notches (25), and the dispersion teeth (42) comprise a plurality of upper teeth (421) and lower teeth (422) which are sequentially arranged at intervals and are connected with the dispersion plate (41) in a vertical or inclined manner.