A silicone sealant static mixer

Abstract

The present invention discloses a silicone sealant static mixer, which belongs to the technical field of silicone sealant production equipment. It mainly includes a planetary stirring device, the bottom flange of the planetary stirring device is connected to the static mixing device, the static mixing device includes a discharge pipe connected to the bottom flange of the planetary stirring device, the other end of the discharge pipe is flange-connected to ball valve 1, the other end of the ball valve 1 is flange-connected to a high-viscosity rotor pump, the other end of the high-viscosity rotor pump is flange-connected to the static mixer, the other end of the static mixer is flange-connected to ball valve 2, and a mixing unit is fixed on the inner wall of the static mixer. The present invention achieves the effect of fully mixing when the silicone sealant flows inside the static mixer at a lower flow rate by setting a low-speed splitting unit; and the mixing unit is set to achieve the mixing of the silicone sealant in the radial direction of the static mixer. The present invention is mainly used for mixing silicone sealants.

Description

Technical Field

[0001] The invention belongs to the technical field of silicone sealant production equipment, and in particular, relates to a silicone sealant static mixer. Background Art

[0002] At present, silicone sealants are used in various occasions. When producing silicone sealants, various raw materials need to be mixed to make them react chemically. The higher the degree of mixing between the various raw materials, the more stable the performance of the produced silicone sealant. Existing mixing equipment includes static mixers, which cut and rotate the silicone sealant to continuously separate and mix the silicone sealant at 2 times the speed to achieve the purpose of sufficient mixing. The SK type static mixer among static mixers is very suitable for mixing operations of high-viscosity fluids due to its simple structure. However, with the increase in demand for silicone sealant production, the diameter of the static mixer will become thicker and thicker, while the high-viscosity pump will find it difficult to keep up with the demand for maintaining the flow speed of the silicone fluid. In order to expand production capacity, the diameter of the static mixer is thickened, and the high-viscosity pump that provides forward power for the silicone cannot provide sufficient pressure. The flow speed of the silicone inside the static mixer slows down. At this time, the mixing unit in the mixer can only provide shear force to the silicone sealant to divide the sealant, but due to the slowed flow speed, the silicone sealant cannot achieve sufficient torsional force in the static mixer, so that a part of the silicone close to the tube wall and the silicone close to the center of the mixing unit are difficult to exchange positions, and the silicone sealant is difficult to achieve sufficient mixing in the radial direction of the static mixer.

[0003] A Chinese patent with authorization announcement number "CN114749082B" discloses a static mixer for silicone adhesive production, including a static mixing mechanism, a special sleeve and a spliced ​​mixing core. The special sleeve is used to increase the number of strands of the silicone adhesive mixture by multiples of four. By setting the special sleeve, the mixed liquid is more uniform compared to the traditional static mixer's 2-fold speed division into four-fold speed division.

[0004] During the later use, the device still had the following problems: 1. The mixing effect was poor at low speeds. The special tube sleeve still achieved the purpose of mixing by dividing and twisting the silicone sealant. Once the flow rate of the silicone sealant slowed down, the shear force on the silicone sealant remained unchanged but the torsional force dropped sharply, and the mixing effect was reduced; 2. The stirring blade structure was single, and the pre-mixing effect of the silicone sealant was poor. The mixing time was too long, which reduced work efficiency. Summary of the invention

[0005] The technical problem to be solved by the present invention is: to overcome the shortcomings of the prior art and provide a silicone sealant static mixer, which, by setting a low-speed splitting unit, achieves the effect of sufficient mixing when the silicone sealant flows at a lower flow rate inside the static mixer; by setting a mixing unit, the mixing of the silicone sealant in the radial direction of the static mixer is achieved; and by setting a planetary stirring device, the mixing efficiency of the silicone sealant is improved.

[0006] The silicone sealant static mixer comprises a planetary stirring device, the bottom flange of the planetary stirring device is connected to the static mixing device, the static mixing device comprises a discharge pipe connected to the bottom flange of the planetary stirring device, the other end of the discharge pipe is flange-connected to ball valve 1, the other end of the ball valve 1 is flange-connected to a high-viscosity rotor pump, the other end of the high-viscosity rotor pump is flange-connected to the static mixer, the other end of the static mixer is flange-connected to ball valve 2, a mixing unit is fixedly provided on the inner wall of the static mixer, the mixing unit comprises a low-speed splitting unit and a mixing unit, and the low-speed splitting unit and the mixing unit are fixedly connected.

[0007] Preferably, the low-speed segmentation unit comprises a spiral body, and the head end and the tail end of the spiral body are both fixedly connected with low-speed torsion protrusions.

[0008] Preferably, the mixing unit comprises four groups of mixing assembly tubes, the mixing assembly tubes comprising an outer ring tube opening, one end of the outer ring tube opening is fixedly connected to a conveying pipeline, and the other end of the conveying pipeline is fixedly connected to an inner ring tube opening.

[0009] Preferably, the planetary stirring device comprises a stirring tank, a sealing cover is installed on the top of the stirring tank, a supporting seat is installed at the bottom of the stirring tank, a discharge port is opened at the center of the bottom of the stirring tank, the discharge port is connected to the discharge pipe flange, the sealing cover surface is fixedly connected to a driving mechanism, the output end of the driving mechanism is rotatably connected to a belt, the other end of the belt is rotatably connected to a pulley, the bottom of the pulley is fixedly connected to a rotating frame, the outer wall of the rotating frame is rotatably connected to the sealing cover, scrapers are fixedly connected on both sides of the rotating frame, the scrapers are in contact with the inner wall of the stirring tank, a fixed retaining ring is fixedly connected on the scraper, a planetary gear is rotatably connected to the bottom of the rotating frame, a stirring tube is fixedly connected to the bottom of the stirring tube, a suction nozzle is fixedly connected, a plurality of groups of discharge holes are opened on the side wall of the stirring tube, a plurality of groups of stirring blades are sleeved on the side wall of the stirring tube, a fixed bracket is fixedly connected to the center of the top of the sealing cover, a fixed bracket is fixedly connected to the center of the fixed bracket, the fixed rod extends downward to the bottom of the rotating frame, the fixed rod is rotatably connected to the inner wall of the rotating frame, a center wheel is fixedly installed at the bottom of the fixed rod, and the center wheel and the planetary gear are meshed with each other.

[0010] Preferably, the diameter of the discharge hole gradually increases from the bottom to the top of the stirring tube, and the number of stirring blades gradually decreases from the bottom to the top of the stirring tube.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] 1. A low-speed splitting unit is set. As the silicone sealant flows forward in the static mixer, the cross-sectional shape of the low-speed splitting unit also changes, causing the silicone sealant to twist in the circumferential direction of the static mixer, so that the silicone sealant can still be fully mixed when flowing inside the static mixer at a lower flow rate;

[0013] 2. A mixing unit is set up, and the silicone sealant flows slowly forward in the static mixer. After entering the mixing unit, the silicone sealant flowing close to the pipe wall flows to the center of the static mixer, and the silicone sealant flowing in the center of the static mixer flows to the pipe wall, realizing the mixing of the silicone sealant in the radial direction of the static mixer;

[0014] 3. By setting up a planetary stirring device, the silicone sealant is fully pre-mixed, thereby improving the mixing efficiency of the silicone sealant. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0016] Figure 2 It is a schematic diagram of the overall structure of a planetary stirring device;

[0017] Figure 3 A is a schematic diagram of the internal structure of a planetary stirring device;

[0018] Figure 4 is a structural schematic diagram of the center wheel;

[0019] Figure 5 Schematic diagram B of the internal structure of the planetary stirring device;

[0020] Figure 6 It is a structural schematic diagram of the stirring mechanism;

[0021] Figure 7 It is a schematic diagram of the structure of a static mixing device;

[0022] Figure 8 It is a schematic diagram of the internal structure of a static mixing device;

[0023] Fig. 9 It is a schematic diagram of the structure of the hybrid unit;

[0024] Fig.10 It is a low-speed split unit;

[0025] Fig.11 A mixed unit.

[0026] In the figure, 1, planetary stirring device; 101, stirring tank; 102, sealing cover; 103, feeding port; 104, driving mechanism; 105, fixed bracket; 106, pulley; 107, supporting seat; 108, belt; 109, discharging port; 110, center wheel; 111, rotating frame; 112, scraper; 113, fixed retaining ring; 114, planetary gear; 115, stirring tube; 116, discharging hole; 117, stirring blade; 118, suction Nozzle; 119, fixed rod; 2, static mixing device; 201, discharge pipe; 202, ball valve 1; 203, high viscosity rotor pump; 204, static mixer; 205, fixed support leg; 206, ball valve 2; 207, mixing unit; 208, low-speed splitting unit; 208A, low-speed torsion protrusion; 208B, spiral; 209, mixing unit; 209A, outer ring pipe mouth; 209B, conveying pipeline; 209C, inner ring pipe mouth. DETAILED DESCRIPTION

[0027] The present invention will be further described below in conjunction with the accompanying drawings:

[0028] The directional nouns involved in the detailed description paragraphs are only for the convenience of those skilled in the art to understand the technical solutions described in this application according to the visual orientation shown in the accompanying drawings. Unless otherwise clearly specified and limited, the terms "setting", "installation", "connection", etc. should be understood in a broad sense. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0029] like Figure 1 , Figure 7 and Figure 8 As shown, a silicone sealant static mixer comprises a planetary stirring device 1, the bottom flange of the planetary stirring device 1 is connected to a static mixing device 2, the silicone sealant is pre-mixed by the planetary stirring device 1 to improve the working efficiency of the subsequent static mixer 204, the static mixing device 2 comprises a discharge pipe 201 connected to the bottom flange of the planetary stirring device 1, the other end of the discharge pipe 201 is flange-connected to a ball valve 1 202, the other end of the ball valve 1 202 is flange-connected to a high-viscosity rotor pump 203, and the other end of the high-viscosity rotor pump 203 is flange-connected to the static mixer 204. After the silicone sealant is pre-mixed in the planetary stirring device 1, the ball valve 1 202 and the ball valve 2 206 are opened, the silicone sealant is sucked from the discharge pipe 201 by the high-viscosity rotor pump 203 and pressed into the static mixer 204, so that the silicone sealant is fully mixed in the static mixer 204 and then discharged from the ball valve 2 206 to enter the next process.

[0030] The bottom of the static mixer 204 is fixedly connected with a fixed support leg 205 to ensure the stability of the static mixer 204. The other end of the static mixer 204 is flange-connected with a ball valve 206. A mixing unit 207 is fixedly provided on the inner wall of the static mixer 204. After the silicone sealant is introduced into the static mixer 204, it is fully mixed by the shear force and torsion force of the mixing unit 207. The mixing unit 207 includes a plurality of groups of low-speed segmentation units 208 and a plurality of groups of mixing units 209. The low-speed segmentation units 208 shear and torsion the silicone sealant so that the silicone sealant can be fully mixed in the circumferential direction of the static mixer 204. The mixing unit 209 mixes the silicone sealant in the radial direction of the static mixer 204. After the silicone sealant contacts the mixing unit 209, the silicone sealant flowing on the tube wall of the static mixer 204 is close to the mixing unit 209. The sealant enters from the outer ring pipe mouth 209A of the mixing unit 209, and under the continuous push of the high-viscosity rotor pump 203, enters the inner ring pipe mouth 209C from the delivery pipe 209B. When discharged from the inner ring pipe mouth 209C, the silicone sealant begins to reach the center of the static mixer 204. After the silicone sealant contacts the mixing unit 209, the silicone sealant flowing near the center of the static mixer 204 enters from the inner ring pipe mouth 209C of the mixing unit 209, and under the continuous push of the high-viscosity rotor pump 203, enters the outer ring pipe mouth 209A from the delivery pipe 209B. When discharged from the outer ring pipe mouth 209A, the silicone sealant reaches the wall of the static mixer 204 and flows, thereby completing the mixing operation of the silicone sealant in the radial direction in the static mixer 204, and the low-speed splitting unit 208 and the mixing unit 209 are fixedly connected.

[0031] like Fig. 9 and Fig.10As shown, the low-speed dividing unit 208 includes a spiral 208B, which allows the silicone sealant to undergo diversion, cross-mixing and reverse vortex flow when flowing at a high speed, and allows the silicone sealant to rotate circumferentially relative to the static mixer 204. However, since the cross section of the spiral 208B is semicircular at any distance, the shape of the cross section does not change. Although it can ensure that the silicone sealant is subject to less resistance when flowing at a high speed, the semicircular cross section rotates in a spiral manner, which can cause the silicone sealant to self-twist during the forward movement, pushing the central liquid flow to the periphery and the peripheral liquid flow to the center, thereby achieving a good mixing effect. However, as long as the flow rate of the silicone sealant drops, the diversion effect of the spiral 208B can continue to operate, while the twisting effect is severely reduced, and the liquid flow in the semicircular cross section basically does not undergo violent interaction and mixing, and the liquid flow components in each area remain basically unchanged. At this time, the mixing effect of the silicone sealant in the radial and circumferential directions is far inferior to the mixing effect at a normal flow rate. The head and tail ends of the spiral 208B are fixedly connected with a low-speed torsion protrusion 208A, and the cross-section of the low-speed torsion protrusion 208A is different at different distances. When the silicone sealant flows through the low-speed torsion protrusion 208A, the cross-sectional shape changes continuously, and the space for the silicone sealant flowing close to the wall of the static mixer 204 becomes smaller and smaller, and it is forced to squeeze toward the center of the static mixer 204. The liquid flow originally located on the right side of the semicircular cross-section and flowing close to the center is gradually lifted upward due to the cross-section it flows through and rushes toward the wall of the tube, further pushing the liquid flow originally on the wall of the tube to flow to the left side of the semicircular cross-section and close to the center, so that the silicone sealant continuously undergoes counterclockwise self-twist in the semicircular cross-section to achieve a mixing effect. Since this type of torsion effect on the silicone sealant relies on the structure of the low-speed torsion protrusion 208A itself, even if the silicone sealant flows at a low speed, it can still obtain a good radial and circumferential mixing effect, so that the liquid flow components in various areas of the cross-section are mixed.

[0032] like Fig.11As shown, the mixing unit 209 includes four groups of mixing assembly pipes, and the mixing assembly pipes include an outer ring pipe opening 209A, one end of the outer ring pipe opening 209A is fixedly connected to a delivery pipe 209B, and the other end of the delivery pipe 209B is fixedly connected to an inner ring pipe opening 209C. Two of the four groups of mixing assembly pipes have the outer ring pipe opening 209A facing the liquid flow, and the other two groups have the inner ring pipe opening 209C facing the liquid flow. When the silicone sealant flows through the mixing unit 209, the liquid flow originally flowing close to the pipe wall of the static mixer 204 all flows into the two groups of mixing assembly pipes with the outer ring pipe opening 209A facing the liquid flow, and flows from the outer ring pipe opening 209A to the liquid flow. The liquid originally flowing near the center of the static mixer 204 flows into two groups of mixing assembly tubes with the inner ring pipe opening 209C facing the liquid flow, flows in from the inner ring pipe opening 209C, and flows out from the outer ring pipe 209A at the other end through the delivery pipe 209B, thereby realizing the complete displacement of the silicone sealant in the radial direction of the static mixer 204. Since this type of mixing is achieved by the special structure of the mixing unit 209, radial mixing can be achieved even when the silicone sealant flows at a low speed, thereby efficiently completing the mixing operation.

[0033] like Figure 2-Figure 5 As shown, the planetary stirring device 1 includes a stirring tank 101, a sealing cover 102 is installed on the top of the stirring tank 101, a support seat 107 is installed at the bottom of the stirring tank 101 to support and place the stirring tank 101, a discharge port 109 is opened at the bottom center of the stirring tank 101, the discharge port 109 is flange-connected to the discharge pipe 201, a material inlet 103 is opened on the surface of the sealing cover 102, a driving mechanism 104 is fixedly connected to the surface of the sealing cover 102, the output end of the driving mechanism 104 is rotatably connected to a belt 108, the other end of the belt 108 is rotatably connected to a pulley 106, and the bottom of the pulley 106 is fixedly connected to a rotating The movable frame 111, the outer wall of the rotating frame 111 is rotatably connected to the sealing cover 102, the driving mechanism 104 rotates, and the pulley 106 is driven to rotate through the belt 108, thereby driving the rotating frame 111 to rotate, and scrapers 112 are fixedly connected on both sides of the rotating frame 111. The scraper 112 scrapes the silicone sealant on the inner wall of the stirring tank 101 to avoid long-term adhesion and deterioration affecting the product quality. The scraper 112 contacts the inner wall of the stirring tank 101, and a fixed retaining ring 113 is fixedly connected to the scraper 112. The scraper 112 is reinforced by the fixed retaining ring 113, so that the scraper 112 is subjected to more uniform force, thereby increasing the service life of the scraper 112.

[0034] The bottom of the rotating frame 111 is rotatably connected to a planetary gear 114, and the bottom of the planetary gear 114 is fixedly connected to a stirring tube 115. The planetary gear 114 is meshed with the center wheel 110, driving the stirring tube 115 to revolve around the center in the stirring tank 101 while rotating, so as to achieve a better mixing effect. The bottom of the stirring tube 115 is fixedly connected to a suction nozzle 118, and a plurality of discharge holes 116 are provided on the side wall of the stirring tube 115. A plurality of stirring blades 117 are sleeved on the side wall of the stirring tube 115. The stirring tube 115 rotates to drive the stirring blades 117 and the suction nozzle 118. The stirring blades 117 rotate and break up the silicone sealant and push it upward, so that the silicone sealant continues to flow in the stirring tank 101, so that the liquid flow in the center of the stirring tank 101 flows upward, and the liquid flow near the side wall of the stirring tank 101 flows downward; a plurality of sets of spiral blades are fixedly installed inside the suction nozzle 118, which suck the silicone sealant at the bottom of the stirring tank 101 into the stirring tube 115 and discharge it from the discharge hole 116 opened on the side wall of the stirring tube 115, further promoting the flow of the silicone sealant inside the stirring tank 101 and improving the mixing effect.

[0035] A fixed bracket 105 is fixedly connected to the center of the top of the sealing cover 102, and a fixed rod 119 is fixedly connected to the center of the fixed bracket 105. The fixed rod 119 extends downward to the bottom of the rotating frame 111, and the fixed rod 119 is rotatably connected to the inner wall of the rotating frame 111. A center wheel 110 is fixedly installed at the bottom of the fixed rod 119, and the center wheel 110 and the planetary gears 114 are meshed with each other. The center wheel 110 remains fixed, and the planetary gears 114 rotate around the center wheel 110 while meshing and rotating, so that the stirring tube 115 can revolve and rotate in the stirring tank 101.

[0036] like Figure 6 As shown, the diameter of the discharge hole 116 gradually increases from the bottom to the top of the stirring tube 115 to ensure uniform discharge, and the number of stirring blades 117 gradually decreases from the bottom to the top of the stirring tube 115 to maximize the working efficiency of the stirring blades 117.

[0037] The present invention achieves the effect of being fully mixed when the silicone sealant flows at a relatively low flow rate in the static mixer 204 by setting a low-speed dividing unit 208; achieves the mixing of the silicone sealant in the radial direction of the static mixer 204 by setting a mixing unit 209; and improves the mixing efficiency of the silicone sealant by setting a planetary stirring device 1.

Claims

1. A silicone sealant static mixer, characterized in that: The invention comprises a planetary stirring device (1), wherein the bottom flange of the planetary stirring device (1) is connected to a static mixing device (2), wherein the static mixing device (2) comprises a discharge pipe (201) connected to the bottom flange of the planetary stirring device (1), wherein the other end of the discharge pipe (201) is flange-connected to a ball valve 1 (202), wherein the other end of the ball valve 1 (202) is flange-connected to a high-viscosity rotor pump (203), wherein the other end of the high-viscosity rotor pump (203) is flange-connected to a static mixer (204), wherein the other end of the static mixer (204) is flange-connected to a ball valve 2 (206), wherein a mixing unit (207) is fixedly provided on the inner wall of the static mixer (204), wherein the mixing unit (207) comprises a low-speed splitting unit (208) and a mixing unit (209), wherein the low-speed splitting unit (208) and the mixing unit (209) are fixedly connected; The low-speed splitting unit (208) comprises a spiral body (208B), and the head end and the tail end of the spiral body (208B) are both fixedly connected with a low-speed torsion protrusion (208A); The mixing unit (209) comprises four groups of mixing assembly tubes, each of which comprises an outer ring tube opening (209A), one end of the outer ring tube opening (209A) being fixedly connected to a delivery pipe (209B), and the other end of the delivery pipe (209B) being fixedly connected to an inner ring tube opening (209C). Two of the four groups of mixing assembly tubes have the outer ring tube openings (209A) facing the liquid flow, and the other two groups have the inner ring tube openings (209C) facing the liquid flow.

2. A silicone sealant static mixer according to claim 1, characterized in that: The planetary stirring device (1) comprises a stirring tank (101), a sealing cover (102) is installed on the top of the stirring tank (101), a support seat (107) is installed on the bottom of the stirring tank (101), a discharge port (109) is opened at the center of the bottom of the stirring tank (101), the discharge port (109) is flange-connected to a discharge pipe (201), a driving mechanism (104) is fixedly connected to the surface of the sealing cover (102), an output end of the driving mechanism (104) is rotatably connected to a belt (108), the other end of the belt (108) is rotatably connected to a pulley (106), a rotating frame (111) is fixedly connected to the bottom of the pulley (106), an outer wall of the rotating frame (111) is rotatably connected to the sealing cover (102), scrapers (112) are fixedly connected to both sides of the rotating frame (111), the scrapers (112) are in contact with the inner wall of the stirring tank (101), and the scrapers (112) are in contact with the inner wall of the stirring tank (101). A fixed retaining ring (113) is fixedly connected to the top of the rotating frame (111); a planetary gear (114) is rotatably connected to the bottom of the rotating frame (111); a stirring tube (115) is fixedly connected to the bottom of the planetary gear (114); a suction nozzle (118) is fixedly connected to the bottom of the stirring tube (115); a plurality of discharge holes (116) are provided on the side wall of the stirring tube (115); a plurality of stirring blades (117) are sleeved on the side wall of the stirring tube (115); a fixed bracket (105) is fixedly connected to the center of the top of the sealing cover (102); a fixed rod (119) is fixedly connected to the center of the fixed bracket (105); the fixed rod (119) extends downward to the bottom of the rotating frame (111); the fixed rod (119) is rotatably connected to the inner wall of the rotating frame (111); a center wheel (110) is fixedly installed on the bottom of the fixed rod (119); the center wheel (110) and the planetary gear (114) are meshed with each other.

3. A silicone sealant static mixer according to claim 2, characterized in that: The diameter of the discharge hole (116) gradually increases from the bottom to the top of the stirring tube (115), and the number of the stirring blades (117) gradually decreases from the bottom to the top of the stirring tube (115).

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