阅读说明：本技术 一种聚氨酯高效脱泡装置和脱泡方法 (Efficient polyurethane defoaming device and method ) 是由 林能发 谭梦龙 杜雷 贺显光 吴家平 戴德成 杨军 彭超义 侯彬彬 冯学斌 于 2021-09-24 设计创作，主要内容包括：本发明涉及一种聚氨酯高效脱泡装置和脱泡方法,包括壳体,所述壳体内设置有能转动的脱泡组件,所述脱泡组件包括隔板,隔板包括上隔板和下隔板,物料从上到下依次流过上隔板下隔板,所述隔板上设置有膜厚控制件,膜厚控制件包括固定在隔板上方的控制板,控制板与隔板之间设置有供物料流过的通道；本发明的脱泡时间短,树脂均匀性好,脱泡效果好,脱泡效率高。(The invention relates to a polyurethane high-efficiency defoaming device and a defoaming method, and the device comprises a shell, wherein a rotatable defoaming assembly is arranged in the shell, the defoaming assembly comprises a partition plate, the partition plate comprises an upper partition plate and a lower partition plate, materials sequentially flow through the upper partition plate and the lower partition plate from top to bottom, a film thickness control part is arranged on the partition plate, the film thickness control part comprises a control plate fixed above the partition plate, and a channel for the materials to flow through is arranged between the control plate and the partition plate; the invention has the advantages of short defoaming time, good resin uniformity, good defoaming effect and high defoaming efficiency.)

1. The utility model provides a high-efficient deaeration device of polyurethane, includes casing (1), characterized by, be provided with ability pivoted deaeration subassembly in casing (1), the deaeration subassembly includes the baffle, and the baffle includes baffle (6) and lower baffle (7), and material from the top down flows through last baffle (6) and lower baffle (7) in proper order, be provided with thick control piece (8) of membrane on the baffle, thick control piece (8) of membrane is including fixing control panel (81) in the baffle top, is provided with the passageway that supplies the material to flow through between control panel (81) and the baffle.

2. The efficient defoaming device for polyurethane as claimed in claim 1, wherein the upper partition plate (6) is conical, and the lower partition plate (7) is inverted conical with material discharge holes.

3. The efficient defoaming device for polyurethane as claimed in claim 2, wherein the control plates (81) are circular rings, and the number of the control plates (81) on the same partition plate is 1-3.

4. The efficient defoaming device for polyurethane as claimed in any one of claims 1-3, wherein the distance between the control plate (81) and the partition plate is smaller and smaller along the flowing direction of the materials; or the control plate (81) is parallel to the partition plate, and a baffle (83) for preventing the materials from overflowing the control plate (81) is arranged on the control plate (81).

5. The efficient defoaming device for polyurethane as claimed in any one of claims 1-3, wherein said control plate (81) is fixed on the partition plate by means of fixing rods (82); alternatively, the channel is provided with needling (84) towards the coming direction of the material flow.

6. The efficient defoaming device for polyurethane as claimed in any one of claims 1-3, wherein the number of defoaming assemblies is at least 2; alternatively, the height of the channels in the partition plate becomes smaller and smaller from top to bottom.

7. A polyurethane efficient defoaming device as defined in any one of claims 1-3, wherein said partition is arranged on a rotating shaft (3), the rotating shaft (3) is connected with a motor (2), and a gear box (4) for adjusting the rotating speed of the partition is arranged between the rotating shaft (3) and the partition.

8. The efficient defoaming device for polyurethane as claimed in claim 7, wherein the rotating speed of the upper partition (6) is greater than that of the lower partition (7), and the rotating speed of the defoaming assembly located below is greater than that of the defoaming assembly located above; or the device also comprises a feed pipe (5), and the feed pipe (5) is sleeved outside the rotating shaft (3).

9. A polyurethane efficient defoaming device as defined in any one of claims 1-3, further comprising a vacuum pump (11) for generating negative pressure in the housing (1), a heating system (9) for heating the material, a feeding port (10) and a discharging port (12) for feeding and discharging the material, an output pump (13) for pumping out the material, and a return pipe (16) and a solenoid valve ii (17) for returning the defoamed material to the housing (1).

10. A polyurethane efficient defoaming method using the polyurethane efficient defoaming device according to any one of claims 1-9, characterized in that after polyurethane resin is heated, the polyurethane resin is injected into the shell (1), the material flows through the upper partition plate (6) and the lower partition plate (7) in sequence, the upper partition plate (6) and the lower partition plate (7) rotate simultaneously, the material is accelerated to flow downwards under the action of centrifugal force, the material passes through a channel between the control plate (81) and the partition plates at the tail ends of the partition plates, the thickness of the film of the material is controlled under the action of the control plate, and the outflow of bubbles in the material is accelerated to realize defoaming.

Technical Field

The invention belongs to the technical field of wind power blades, and particularly relates to a polyurethane efficient defoaming device and a defoaming method.

Background

Wind power generation is an important development direction of the national new energy industry in recent years, natural wind energy is converted into electric energy through wind power generation equipment, and the development and utilization of national clean energy are realized. The wind power generation equipment mainly comprises the following components: the system comprises components such as blades (wind wheels), a generator set (including a device), a yaw system, a brake, a speed limit, a tower, a control safety mechanism, an energy storage device and the like.

The quality of the fan blade has great influence on a power generation system, the mainstream material of the fan blade in the current market is converted into polyurethane from epoxy resin, and an important factor for determining the quality of the polyurethane blade is the content of bubbles in the polyurethane, namely the core material, and the content of the polyurethane bubbles is too much, so that the phenomena of blade surface foaming, blade root cavities and the like can be caused, the bearing coefficient of the blade is reduced, serious accidents such as cracking, breaking and the like of the blade can be caused in serious cases, and serious economic loss is caused for blade production enterprises.

In order to remove the bubbles in the polyurethane resin, the common method is to unfold the resin into a film shape, and the bubbles can be separated from the resin as much as possible in a negative pressure environment, and the Chinese patent application No. CN201811180487.0 discloses a defoaming device, a system and a method, wherein the defoaming device comprises a tank body, the tank body comprises a side wall, the upper part of the tank body is provided with a material inlet, the tank body is internally provided with a throwing disc for bearing materials and a plurality of defoaming assemblies which are sequentially arranged below the throwing disc, each defoaming assembly comprises an upper partition plate and a lower partition plate positioned below the upper partition plate, the upper partition plate is internally provided with an upper through hole, and a channel for the materials to pass through is arranged between the lower partition plate and the side wall; the upper partition plate inclines upwards, the lower partition plate inclines downwards, at least one part of the lower partition plate is positioned right below the upper through hole, and the material falls onto the upper partition plate below after passing through the channel. In the flowing process of the resin, the resin is kept in a film state in the whole process, so that bubbles are enabled to be nearest to the liquid surface, and meanwhile, the viscosity is reduced by heating and the vacuum environment is matched, so that the resin can quickly escape. In the device, the number of the partition plates needs to be multiple to keep the film in a better state, so that the time for separating bubbles is longer, the efficiency is lower, the uniformity of the resin distribution in each layer of the partition plates is poor, and the effective utilization of the partition plates is low.

Disclosure of Invention

The invention aims to provide a polyurethane efficient defoaming device and a defoaming method, which have the advantages of short defoaming time, good resin uniformity, good defoaming effect and high defoaming efficiency.

The invention comprises a polyurethane high-efficiency defoaming device which comprises a shell, wherein a rotatable defoaming assembly is arranged in the shell, the defoaming assembly comprises a partition plate, the partition plate comprises an upper partition plate and a lower partition plate, materials sequentially flow through the upper partition plate and the lower partition plate from top to bottom, a film thickness control part is arranged on the partition plate, the film thickness control part comprises a control plate fixed above the partition plate, and a channel for the materials to flow through is arranged between the control plate and the partition plate.

The upper baffle plate is conical, and the lower baffle plate is inverted conical with a material outflow hole.

The control panels are circular rings, and the number of the control panels on the same partition board is 1-3.

The distance between the control plate and the partition plate is smaller and smaller along the flowing direction of the materials; or the control panel is parallel to the partition board, and a baffle for preventing the materials from overflowing the control panel is arranged on the control panel.

The control panel is fixed on the partition board through a fixing rod; or needling towards the coming direction of the material flow is arranged in the channel.

The defoaming assemblies are arranged from top to bottom, and the number of the defoaming assemblies is at least 2; alternatively, the height of the channels in the partition plate becomes smaller and smaller from top to bottom.

The baffle sets up in the pivot, and the pivot is connected with the motor, is provided with the gearbox of adjusting the baffle rotational speed between pivot and the baffle.

The rotating speed of the upper partition plate is greater than that of the lower partition plate, and the rotating speed of the defoaming assembly positioned below is greater than that of the defoaming assembly positioned above; or the device also comprises a feed pipe which is sleeved outside the rotating shaft.

The vacuum pump is used for forming negative pressure in the shell, the heating system is used for heating materials, the feeding hole and the discharging hole are used for feeding and discharging materials, the output pump is used for pumping out the materials, and the return pipe and the electromagnetic valve II are used for returning the defoamed materials into the shell.

The utility model provides an use high-efficient deaeration method of polyurethane of high-efficient deaeration device of polyurethane, polyurethane resin heats the back, pours into the casing into, and the material flows through last baffle and lower baffle in proper order, goes up the baffle and rotates with lower baffle simultaneously, and the material is with higher speed downward flow under the effect of centrifugal force, and at the end of baffle, the material passes the passageway between control panel and the baffle, and the material is under the effect of control panel, controls the membrane thickness of material, and the outflow of bubble in the material is with higher speed, realizes the deaeration.

The invention has the advantages that the viscosity and the overflow of bubbles in the liquid have the following characteristics: firstly, the more viscous the liquid, the more difficult the bubbles escape; the larger the pressure difference is, the more easily bubbles escape; the larger the relative speed of the bubbles and the liquid is, the more easily the bubbles escape; and fourthly, the closer the bubbles are to the liquid surface, the easier the bubbles escape. The polyurethane pressure-reducing device reduces the viscosity of polyurethane through heating, and improves the pressure difference through vacuumizing of the closed tank body.

The invention not only adopts the mode of the partition plate to enable the polyurethane resin to be in a film state, but also more importantly, the partition plate is provided with the film thickness control part, a channel for material to flow through is arranged between the film thickness control part and the partition plate, the height of the channel can be set, the partition plate can rotate, the resin can have the double functions of centrifugal force and the film thickness control part on the partition plate, the resin can quickly reach the set film thickness height, on one hand, the formation of the resin film is accelerated, on the other hand, the number of layers of the partition plate and the height of the film thickness control part can be set according to different viscosities of the resin, and therefore, the consistency of the defoamed polyurethane resin is ensured.

In the flowing process of the polyurethane resin, the polyurethane resin is kept in a film state in the whole process, so that bubbles are enabled to be nearest to the liquid surface, and meanwhile, measures such as heating to reduce viscosity, vacuum environment and the like are matched, so that the bubbles can quickly escape.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

FIG. 2 is an enlarged schematic view of the film thickness control member according to the present invention.

FIG. 3 is a schematic view of the position relationship of the film thickness control member of the present invention.

In the figure, 1 a shell, 2 a motor, 3 a rotating shaft, 4 a gear box, 5 a feeding pipe, 6 an upper partition plate, 7 a lower partition plate, 8 a film thickness control part, 81 a control plate, 82 a fixing rod, 83 a baffle plate, 84 a puncture needle, 9 a heating system, 10 a feeding hole, 11 a vacuum pump, 12 a discharging hole, 13 an output pump, 14 solenoid valves I, 15 a glue outlet, 16 a return pipe and 17 a solenoid valve II.

Detailed Description

As shown in fig. 1-3, the efficient polyurethane defoaming device of the present invention includes a housing 1, a rotatable defoaming assembly is disposed in the housing 1, the defoaming assembly includes a partition plate, the partition plate includes an upper partition plate 6 and a lower partition plate 7, a material sequentially flows through the upper partition plate 6 and the lower partition plate 7 from top to bottom, a film thickness control member 8 is disposed on the partition plate, the film thickness control member 8 includes a control plate 81 fixed above the partition plate, and a channel for the material to flow through is disposed between the control plate 81 and the partition plate.

Polyurethane resin enters the shell 1 from the upper feeding hole 10, falls on the partition plates in the shell 1, firstly falls on the upper partition plate 6 of the defoaming assembly at the top, all the partition plates are inclined downwards from top to bottom, in order to improve the defoaming efficiency of the polyurethane, the resin can be fully thinned at each position on the partition plates, the partition plates are generally selected to be conical, the upper partition plate 6 is preferably conical, and the lower partition plate 7 is preferably inverted conical with a material outlet hole. The polyurethane resin flows from the most tip of the upper partition plate 6 to the conical bottom, and the defoaming assembly is rotatable, so that when the resin flows on the partition plate, in addition to the action of gravity, the action of the centrifugal force is also acted, but the action direction of the gravity is vertical downward, and the action direction of the centrifugal force is tangential direction, so that the distribution of the resin can become uneven, the unevenness can continue to the subsequent defoaming of the lower layer, and the total defoaming rate of the resin is not high. Therefore, in order to improve the defoaming effect, it is a common practice to increase the number of defoaming units, that is, to extend the flow path of the resin to make the resin thinner, but to increase the defoaming time.

This application is on pivoted deaeration subassembly's basis, still be provided with membrane thickness control 8, membrane thickness control 8 is including fixing the control panel 81 in the baffle top, be provided with the passageway that supplies the material to flow through between control panel 81 and the baffle, inhomogeneous material or be higher than the material of passageway height can be by the controlled height, if only adopt the control panel, the influence of gravity is difficult to overcome under the effect of inside viscosity and control panel to resin, thereby the mobility of resin has been influenced, deaeration subassembly's rotation and control panel 81 cooperation after, can reduce control panel 81's negative effects, deaeration efficiency and effect are improved.

The control panels 81 are circular rings, and the number of the control panels 81 on the same partition plate is 1-3. The position of control panel generally is located the end of baffle, and the membrane thickness at this moment is exactly the minimum of same baffle originally, after through the control panel, when flowing to next baffle, the even degree of resin obviously promotes. The control board 81 is circular and matched with a conical partition board, so that the uniformity of resin can be effectively controlled.

The distance between the control plate 81 and the partition plate becomes smaller and smaller along the flow direction of the materials; alternatively, the control plate 81 is parallel to the partition plate, and a baffle 83 for preventing the material from overflowing the control plate 81 is disposed on the control plate 81. This is to control the thickness of the resin by controlling the resin not to flow over the control plate but only from the passage under the control plate.

The control panel 81 is fixed on the partition plate through a fixing rod 82; alternatively, the channels are provided with spikes 84 that are oriented in the direction of the incoming stream flow. The number of the fixing bars 82 does not affect the flow of the resin, and the needle pricks 84 are used to prick the air bubbles hidden in the resin, thereby enhancing the outflow of the air bubbles.

The defoaming assemblies are arranged from top to bottom, and the number of the defoaming assemblies is at least 2; alternatively, the height of the channels in the partition plate becomes smaller and smaller from top to bottom. The film thickness is gradually reduced in a layer-by-layer progressive mode, uniformity is guaranteed, and simultaneously defoaming efficiency is improved.

The baffle sets up in pivot 3, and pivot 3 is connected with motor 2, is provided with the gearbox 4 of adjusting the baffle rotational speed between pivot 3 and the baffle. The gearbox 4 controls different partition boards to have different speeds, specifically, the rotating speed of the upper partition board 6 is greater than that of the lower partition board 7, and the rotating speed of the defoaming assembly located below is greater than that of the defoaming assembly located below, so that the defoaming effect is improved by matching with the height of the control board 81. The rotation directions of the upper partition 6 and the lower partition 7 are the same.

When the resin is on last baffle 6, under the effect of gravity and centrifugal force, the effort outwards diverges, and resin speed is faster and faster, and when the resin fell to lower baffle 7 from last baffle 6, the effort inwards converged to the flow velocity of control resin eliminates the harmful effects that flow velocity was too fast brought.

The resin feeding device is characterized by further comprising a feeding pipe 5, wherein the feeding pipe 5 is sleeved outside the rotating shaft 3, the feeding pipe 5 is of a double-layer structure, the inner layer pipe is sleeved outside the rotating shaft, and a resin flowing channel is arranged between the inner layer pipe and the outer layer pipe.

The vacuum pump 11 is used for forming negative pressure in the shell 1, the heating system 9 is used for heating materials, the feeding hole 10 and the discharging hole 12 are used for feeding and discharging materials, the output pump 13 is used for pumping out the materials, and the return pipe 16 and the electromagnetic valve 17 are used for returning the defoamed materials to the shell 1.

A polyurethane efficient defoaming method using a polyurethane efficient defoaming device is characterized in that after resin is fed from a feed inlet 10, under the action of a heating system 9, polyurethane resin is heated and injected into a shell 1, materials sequentially flow through an upper partition plate 6 and a lower partition plate 7, the materials flow downwards from the uppermost tip of the upper partition plate 6 and flow downwards from the lowermost edge of the upper partition plate 6, the diameter of the lower partition plate 7 is larger than that of the upper partition plate 6, namely, the edge of the lower partition plate 7 can receive the materials flowing downwards from the upper partition plate 6, the materials flow inwards and downwards from the edge of the lower partition plate 7, flow out from a material outflow hole in the center and then enter a defoaming assembly below, and the process is repeated. Go up baffle 6 and baffle 7 and rotate simultaneously down, the material is with higher speed downward flow under the effect of centrifugal force, and meanwhile, vacuum pump 11 evacuation, the bubble that will break away from is discharged in casing 1, and at the end of baffle, the material passes the passageway between control panel 81 and the baffle, and the material is under the effect of control panel, and the membrane thickness of control material is with higher speed the outflow of bubble in the material, realizes the deaeration. After passing through the last defoaming assembly, the polyurethane resin flows out of the discharge port 12, flows out of the glue outlet 15 under the action of the output pump, and is subjected to the next step, and if the defoaming effect is not ideal, the polyurethane resin can flow into the shell 1 again through the return pipe 16 through the solenoid valve I14 and the solenoid valve II 17 to be defoamed.

The undebubbled polyurethane enters from the feed inlet 10, and the solenoid valve 17 II is closed.

When defoaming is started, the vacuum pump 11 and the heating system 9 are turned on, and polyurethane is vacuumed into the casing 1.

The polyurethane enters the defoaming component and flows downwards in a zigzag manner from the upper surface. Repeating the steps for multiple times to form the polyurethane into a film state.

In the defoaming state, the output pump 13 is started, the electromagnetic valve 14I is upwards opened (the electromagnetic valve 14I is a three-way electromagnetic valve), the electromagnetic valve II 17 is opened, and the polyurethane returns to the heating device without stopping circulation.

After the defoaming is finished, the output pump 13 is started, the electromagnetic valve 14I is opened rightwards, the electromagnetic valve II 17 is closed, and the defoamed finished product flows to the glue outlet 15. The whole defoaming process is completed.

Those of ordinary skill in the art will understand that: the discussion of any embodiment above is meant to be exemplary only, and is not intended to intimate that the scope of the disclosure, including the claims, is limited to these examples; within the spirit of the present disclosure, features from the above embodiments or from different embodiments may also be combined, steps may be implemented in any order, and there are many other variations of different aspects of one or more embodiments in this application as described above, which are not provided in detail for the sake of brevity.

It is intended that the one or more embodiments of the present application embrace all such alternatives, modifications and variations as fall within the broad scope of the appended claims. Therefore, any omissions, modifications, substitutions, improvements, and the like that may be made without departing from the spirit and principles of one or more embodiments of the present disclosure are intended to be included within the scope of the present disclosure.