CN217511591U - Full-automatic rewinding cleaning machine for polyvinylidene fluoride porous membrane - Google Patents

Abstract

The full-automatic rewinding cleaning machine for the polyvinylidene fluoride porous membrane comprises a water tank (1) and is characterized in that: the water tank (1) is internally provided with a section frame (2), the section frame (2) is provided with two groups of bearing seats (4), each group of bearing seats (4) is respectively provided with a film reel (5), and each film reel (5) is provided with a film core barrel (6); the driven synchronous wheels (9) are respectively arranged at the same ends of the two film reels (5), the two driven synchronous wheels (9) are connected with a driving wheel (11) through synchronous belts (10), and the driving wheel (11) is driven by a motor (12); and a distance sensor (13) is arranged at the upper part of the other end of the section bar frame (2). The utility model discloses can be in succession, even fall the membrane, the volatility when reducing the membrane falls, fall the membrane in-process simultaneously and need not artificial intervention, can avoid the production of fold, crease, it is neat to fall the membrane turn-up edge after the replacement of book is accomplished.

Description

Full-automatic rewinding cleaning machine for polyvinylidene fluoride porous membrane

Technical Field

The utility model relates to a polyvinylidene fluoride membrane preparation technology, especially a replacement technique of polyvinylidene fluoride membrane preparation in-process solvent, specifically speaking are full-automatic cleaning machine that rolls back of polyvinylidene fluoride porous membrane.

Background

At present, when a polyvinylidene fluoride (PVDF) membrane is manufactured by an immersion precipitation method, a polymer solution is firstly coated on a reinforced material in a scraping mode, then the membrane is immersed in water, a solvent is diffused into the water, a non-solvent is diffused into the scraped membrane, after a period of time, the exchange between the solvent and the non-solvent reaches a certain degree, and a rich phase in the polymer solution is solidified into a membrane main body shortly after phase separation. When the polyvinylidene fluoride (PVDF) membrane is used for gas treatment, the solvent contained in the membrane is required to be completely replaced by water, the continuous production equipment cannot be used in a large water bath tank due to the limitation of a field, and a replacement tank can be independently used for soaking the PVDF membrane for a long time. In this process, the vinylidene fluoride (PVDF) membrane is rewound to achieve rapid diffusion and displacement, i.e., the membrane is rotated continuously so that the polymer solution is in sufficient contact with the water to allow the solvent to diffuse into the water, in order to completely displace the solvent. At present, a manual rewinding mode is usually adopted, and in the manual rewinding process, due to the fact that manual rewinding force and speed are uneven and discontinuous, a fold is formed on a film, and a human hand touches the film surface, so that the film surface is wrinkled; the mode of manual membrane pouring is inefficient, the labor intensity is high, the membrane roll is not uniform due to unstable stress and speed, the automatic dryer cannot be installed in the later period, and the membrane roll can only be manually spread and aired and then be manually collected.

SUMMERY OF THE UTILITY MODEL

The utility model aims at designing a full-automatic cleaning machine that rolls back of polyvinylidene fluoride porous membrane to need artifical membrane in order to accelerate replacement speed and plant into intensity of labour too big at present in order to improve polyvinylidene fluoride (PVDF) membrane solvent at the replacement in-process, the membrane face easily produces the problem that the fold can't satisfy follow-up production needs.

The technical scheme of the utility model is that:

the full-automatic rewinding cleaning machine for the polyvinylidene fluoride porous membrane comprises a water tank 1 and is characterized in that: the water tank 1 is internally provided with a sectional material frame 2, two groups of bearing seats 4 are arranged on a middle end crosspiece 3 of the sectional material frame 2, each group of bearing seats 4 is respectively provided with a film reel 5, each film reel 5 is provided with a film core barrel 6, one film core barrel 6 wound with the polyvinylidene fluoride porous film is a releasing barrel, and the other film core barrel without the polyvinylidene fluoride porous film is a retracting barrel; driven synchronizing wheels 9 are respectively arranged at the same ends of the two film reels 5, the two driven synchronizing wheels 9 are connected with a driving wheel 11 through a synchronous belt 10, and the driving wheel 11 is driven by a motor 12 arranged at the upper part of one end of the section bar frame 2; a distance sensor 13 for measuring the thickness of a film roll 14 on the film core cylinder 6 is arranged at the upper part of the other end of the section bar frame 2; the water level 17 in the tank 1 should be greater than the full roll of the film cartridge 6.

The two ends of the film reel 5 are provided with conical locking heads 7, and the conical locking heads 7 fix the two ends of the film core cylinder 6 on the film reel 5 through locking nuts 8.

The water tank 1 is also provided with a circulating water pump 15 and a filter 16.

The section bar frame 2 is also provided with a speed controller 18 for controlling the rotating speed of the motor 12.

The same ends of the two film reels 5 are provided with driven synchronizing wheels 9 through one-way bearings, and the directions of the one-way bearings on the two film reels 5 are opposite.

The utility model has the advantages that:

the utility model discloses can be in succession, even fall the membrane, the volatility when reducing the membrane falls, fall the membrane in-process simultaneously and need not artificial intervention, can avoid the production of fold, crease, it is neat to fall the membrane turn-up edge after the replacement of book is accomplished.

Drawings

Fig. 1 is a schematic perspective view of the present invention.

Fig. 2 is a schematic view of the height of water surface.

Fig. 3 is a schematic diagram of the transmission system of the present invention.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and examples.

As shown in fig. 1-3.

A full-automatic rewinding cleaning machine for a polyvinylidene fluoride porous membrane comprises a water tank 1, wherein a section bar frame 2, a circulating water pump 15 and a filter 16 are arranged in the water tank 1, the circulating water pump and the filter can accelerate the diffusion of a solvent and ensure the cleanliness of water, and the water tank 1 is shown in figure 1. Two groups of bearing seats 4 are arranged on a middle end crosspiece 3 of the section bar frame 2, a film reel 5 is respectively arranged on each group of bearing seats 4, two ends of the film reel 5 are respectively provided with a conical locking head 7, and the two ends of a film core tube 6 are fixed on the film reel 5 through locking nuts 8 by the conical locking heads 7, as shown in fig. 3. Each film scroll 5 is provided with a film core barrel 6, one film core barrel 6 wound with the polyvinylidene fluoride porous film is an unwinding barrel, and the other film core barrel without the polyvinylidene fluoride porous film is a winding barrel; the same end of each of the two film reels 5 is provided with a driven synchronous wheel 9, the two driven synchronous wheels 9 are connected with a driving wheel 11 through a synchronous belt 10, and the driving wheel 11 is driven by a motor 12 arranged at the upper part of one end of the section bar frame 2, as shown in fig. 3; a distance sensor 13 for measuring the thickness of a film roll 14 on the film core cylinder 6 is arranged at the upper part of the other end of the section bar frame 2, as shown in figure 1; the water level 17 in the tank 1 should be greater than the level of the film cartridge 6 when fully rolled (as shown in figure 2). The section bar frame 2 is also provided with a speed controller 18 for controlling the rotating speed of the motor 12.

The details are as follows:

as shown in fig. 1-3, the utility model comprises a servo motor or a stepping motor, a synchronizing wheel, a synchronous belt, a one-way bearing, a bearing seat, a film reel, a conical locking head, a locking nut, a section bar frame, a distance sensor, a speed controller, a water tank, a circulating water pump and a filter. The membrane core cylinder is fixed on the membrane scroll through the conical locking heads and the locking nuts which are arranged at the two ends of the membrane scroll. The film reel and the bracket are fixed through a bearing seat, and the bearing is a ceramic bearing or a plastic bearing. The rotation of the film roll is driven by a horizontally arranged film roll shaft, the film roll shaft is rotated to rewind, and the rewinding shaft is driven by a stepping motor or a servo motor through a synchronous belt wheel, a synchronous belt and a one-way bearing. The adjustment of the rewinding speed is accurately controlled by a speed controller, so that rewinding at different speeds is realized. Motor, the axle of falling the membrane are connected by hold-in range, synchronizing wheel, and it can be stable to set up reasonable reduction ratio, and the even membrane that falls reduces the volatility when falling the membrane. The high-precision distance sensor is installed above the film roll, and when the film core barrel of the discharging shaft is not provided with the film roll, a zero point is set, so that the distance change between the sensor and the film rewinding shaft, which is caused by the change of the thickness of the film roll, can be accurately measured. The sensor detects the change of film roll thickness, and when detecting zero signal, the motor changes and turns to, realizes the conversion of power take off on two film spools through one-way bearing, realizes full-automatic falling membrane. Only need the manual work to change the membrane book, the membrane process of falling need not artificial intervention, avoids the production of fold, crease, guarantees the quality of producing the membrane. A circulating water pump and a filter are arranged in the water tank, so that the diffusion of the solvent is accelerated, and the cleanliness of water is ensured.

The working principle of the utility model is that a film roll with a film core cylinder is arranged on a film scroll, another film-free film core cylinder is fixed on another film scroll, two ends of the film scroll are provided with a conical locking head and a locking nut, the film scroll can be fixed on the film scroll by rotating the locking nut, the film scroll is fixed on a bracket in parallel through two pairs of middle bearing seats and is put into a water tank together, the two film scrolls are arranged as a discharging scroll (the diameter of the film roll is reduced during the operation), the other film-free scroll is arranged as a receiving scroll (the diameter of the film roll is increased during the operation), the functions of the two scrolls are exchanged by reversely rotating, the film is adhered on the receiving scroll by using double faced adhesive tape, the water level in the water tank does not exceed the film roll, a motor drives a driving synchronous pulley to rotate, a synchronous wheel arranged on the scroll is driven to rotate by a synchronous belt, one-way bearing is arranged between the synchronous wheel and the film scroll (one-way bearing is used for one-way braking, the purpose of rotating in the other direction is to assume that the two winding rollers are A and B, when the A is used as a driving wheel, the one-way bearing on the A is in a braking state, otherwise, the torque of the synchronous pulley cannot be transferred to the roller A, and the one-way bearing of the roller B is in a rotating state. When the direction is reversed, the one-way bearing at the position B can transmit torque in a braking state, and the one-way bearing at the position A is in a rotating state. Which acts as an overrunning clutch. If do not use one-way bearing, directly with synchronous pulley with receive and release the roller rigid connection, the motor torque transfer has two routes, first to unreeling the roller: motor-belt-unwinding roller synchronous pulley-unwinding roller; secondly, the following steps: the device comprises a motor, a belt, a wind-up roller synchronous pulley, a wind-up roller, a film cloth and a wind-up roller. The diameter of the outer circle of the non-woven fabric roller is changed along with the winding and unwinding, and the diameter of the synchronous belt wheel arranged on the roller is fixed, so that the motor transmits power to the synchronous belt wheel on the winding and unwinding roller; the motor transmits power to the unwinding roller through the film cloth by the winding roller; the rotating speed of the motor is constant, the rotating speed transmitted by the synchronous belt is constant, the rotating speed transmitted by the non-woven fabric is not constant (the winding is thicker and thinner, the unwinding is thinner and thinner), the amount of the film cloth between the winding and unwinding is less than that of the film cloth between the winding and unwinding in the front half section, the amount of the film cloth between the winding and unwinding in the rear half section is less than that of the film cloth between the winding and unwinding, and the amount of the film cloth to be wound is more than that of the film cloth between the winding and unwinding, so that the power transmission between the winding and unwinding can be transmitted only through one path of a winding roller, the film cloth and the unwinding roller, a one-way bearing or an overrunning clutch (the structure size of the overrunning clutch is too large) must be installed, the power can be transmitted when the film cloth is used as a driving wheel for winding, and the power is disconnected with a synchronous belt pulley at the shaft end when the winding and unwinding are performed.

The synchronizing wheel is connected with the film winding shaft through the one-way bearing, only the material receiving winding shaft receives driving force of the motor when rewinding is guaranteed, the discharging winding shaft is a free end, the film is in continuous and uniform contact with water when moving on the material receiving winding shaft, meanwhile, the distance sensor is arranged on the film winding shaft, after the film is completely discharged when the material is wound on the material receiving winding shaft, the motor receives signals of the sensor, the rotating direction is changed, and the operation is repeated, so that the function of full-automatic film rewinding is realized. In order to accelerate diffusion, a circulating water pump and a filter are arranged in the water tank, water in the whole water tank is always subjected to circulating filtration while the water tank is rewound, and the replacement efficiency and cleanness are guaranteed.

The utility model discloses the part that does not relate to all is the same with prior art or can adopt prior art to realize.

Claims (5)

1. The full-automatic rewinding cleaning machine for the polyvinylidene fluoride porous membrane comprises a water tank (1) and is characterized in that: the water tank (1) is internally provided with a sectional material frame (2), two groups of bearing seats (4) are arranged on a middle end crosspiece (3) of the sectional material frame (2), each group of bearing seats (4) is respectively provided with a film reel (5), each film reel (5) is provided with a film core barrel (6), one film core barrel (6) wound with the polyvinylidene fluoride porous film is an unwinding barrel, and the other film core barrel without the polyvinylidene fluoride porous film is a winding barrel; driven synchronous wheels (9) are respectively arranged at the same ends of the two film reels (5), the two driven synchronous wheels (9) are connected with a driving wheel (11) through synchronous belts (10), and the driving wheel (11) is driven by a motor (12) arranged at the upper part of one end of the section frame (2); a distance sensor (13) for measuring the thickness of a film roll (14) on the film core cylinder (6) is arranged at the upper part of the other end of the section bar frame (2); the height of the water surface (17) in the water tank (1) is larger than the height of the film core cylinder (6) when the film core cylinder is fully rolled.

2. The full-automatic rewinding cleaning machine for the polyvinylidene fluoride porous membrane according to claim 1, characterized in that: the two ends of the film reel (5) are provided with conical locking heads (7), and the conical locking heads (7) fix the two ends of the film core barrel (6) on the film reel (5) through locking nuts (8).

3. The full-automatic rewinding cleaning machine for the polyvinylidene fluoride porous membrane according to claim 1, characterized in that: the water tank (1) is also internally provided with a circulating water pump (15) and a filter (16).

4. The full-automatic rewinding cleaning machine for the polyvinylidene fluoride porous membrane according to claim 1, characterized in that: and a speed controller (18) for controlling the rotating speed of the motor (12) is also arranged on the section bar frame (2).

5. The full-automatic rewinding cleaning machine for the polyvinylidene fluoride porous membrane according to claim 1, characterized in that: the same end of the two film reels (5) is provided with a driven synchronizing wheel (9) through a one-way bearing, and the directions of the one-way bearings on the two film reels (5) are opposite.

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