CN114367263A - A waterborne polyurethane prepolymer synthesis device - Google Patents

Abstract

The invention discloses a waterborne polyurethane prepolymer synthesis device, which comprises a feeding pipe arranged at the upper end of a synthesis tank and a guide pipe arranged at one side of the lower end of the synthesis tank, wherein a sampling cylinder communicated with the inner cavity of the synthesis tank is arranged on the surface of the lower end of the synthesis tank; the synthesis device has the advantages of simple sampling, high safety factor, convenience in disassembling the sample collection bottle and improvement on the convenience of prepolymer sampling.

Description

A kind of water-based polyurethane prepolymer synthesis device

technical field

The invention relates to the field of water-based polyurethane prepolymer synthesis, in particular to a water-based polyurethane prepolymer synthesis device.

Background technique

Water-based polyurethane is a new type of polyurethane system that uses water instead of organic solvents as the dispersion medium, also known as water-dispersed polyurethane, water-based polyurethane or water-based polyurethane. The synthesis methods of waterborne polyurethane mainly include prepolymer method, acetone method and melt dispersion method.

When using prepolymer to synthesize water-based polyurethane, it is necessary to use a synthesis device for operation. The synthesis device includes a stirring mechanism arranged at the upper end of the synthesis device. During the synthesis process, the synthetic raw materials need to be sampled and tested. When sampling, generally Open the cover of the synthesis device for sampling, because the stirring mechanism is set at the upper end of the synthesis device, sampling is inconvenient, and the risk factor is good, and the operation is cumbersome. For this reason, we provide a water-based polyurethane prepolymer synthesis device.

SUMMARY OF THE INVENTION

In order to overcome the deficiencies of the prior art, the present invention provides a water-based polyurethane prepolymer synthesis device to solve the problems raised in the above-mentioned background art.

In order to solve the above-mentioned technical problems, the present invention provides the following technical solutions: a water-based polyurethane prepolymer synthesis device, comprising a feed pipe arranged on the upper end of a synthesis tank and a lead-out pipe on one side of the lower end, and the lower surface of the synthesis tank is provided with a A sampling cylinder communicated with its inner cavity, a sampling hole runs through the middle part of one end side of the sampling cylinder close to the synthesis tank, a piston is provided at one end of the inner cavity of the sampling cylinder close to the sampling hole, and one end side of the piston away from the sampling hole is fixedly connected. a piston rod, the other end of the piston rod slides and extends to the outside of the sampling cylinder and is fixed with a push-pull plate; the lower end of the sampling cylinder is provided with a sample collection bottle that communicates with its inner cavity, and the sample collection bottle is connected to the sampling cylinder in a split type .

As a preferred technical solution of the present invention, one end of the outer periphery of the sampling cylinder close to the push-pull plate is symmetrically fixed with a connecting plate, and a first spring is fixed between the two ends of the push-pull plate and the connecting plate.

As a preferred technical solution of the present invention, the lower end of the sampling cylinder is provided with a connecting block integrally connected with it, the lower side of the connecting block is fixed with a first connecting pipe, and the outer peripheral surface of the first connecting pipe is provided with There is an external thread, and the upper end of the sample collection bottle is fixedly connected with a second connection pipe adapted to the first connection pipe, and the inner peripheral surface of the second connection pipe is provided with an inner thread.

As a preferred technical solution of the present invention, a transparent observation window is vertically arranged on the surface of the sample collection bottle.

As a preferred technical solution of the present invention, it also includes a motor disposed in the middle of the upper side of the synthetic tank, the outer end of the motor is provided with a motor fixing seat fixed to the synthetic tank, and the motor drive end bearing extends to the synthetic tank A stirring shaft is connected inside and drivingly, and a plurality of stirring blades are fixedly fixed on the surface of the stirring shaft at equal distances.

As a preferred technical solution of the present invention, one side of the upper and lower ends of the stirring shaft is fixed with a support plate, and the other end of the support plate is fixed with a scraper attached to the inner cavity wall of the synthesis tank.

As a preferred technical solution of the present invention, the synthesis tank includes an inner tank and an outer tank, and a cavity is formed between the inner tank and the outer tank, the upper end of the synthesis tank is provided with a main pipe communicating with the cavity, and the main pipe is The other end of the tank is respectively connected with a steam pipe and a condensed water introduction pipe through a three-way, and the surfaces of the steam pipe and the condensed water introduction pipe are all provided with a one-way valve, and the upper and lower ends of the synthesis tank are also provided with a ventilation pipe that communicates with the cavity. and drain pipes.

As a preferred technical solution of the present invention, the inner cavity wall of the synthesis tank is provided with a temperature sensor, and the upper side of the synthesis tank is provided with a temperature display electrically connected with the temperature sensor.

As a preferred technical solution of the present invention, a flow sensor is arranged inside the connection block, and a flow device connected to the flow sensor is arranged on the surface thereof.

As a preferred technical solution of the present invention, the bottom side of the synthetic tank is symmetrically provided with a U-shaped mounting plate with downward opening, the middle of the U-shaped mounting plate is connected with a roller, and the upper side of the U-shaped mounting plate is connected to the upper side of the U-shaped mounting plate. A second spring is fixedly connected between the bottom sides of the synthetic tank.

Compared with the prior art, the beneficial effects that the present invention can achieve are:

1. Through the use of the set sampling cylinder, push-pull plate, piston rod, piston and sampling hole, it is convenient to introduce the prepolymer sample into the sample collection bottle, and the sampling is completed. The synthesis device is simple in sampling and has a high safety factor. The cooperation of the flow sensor and the flowmeter facilitates the observation of the imported amount, preventing the phenomenon of waste when the exported amount is too small to be used for detection or the exported amount is too large. The use of the first connecting pipe and the external thread facilitates the disassembly of the sample collection bottle and improves the convenience of prepolymer sampling;

2. The prepolymer raw material is first introduced into the inner cavity of the synthesis tank through the feeding pipe, and then the motor is controlled to work. The motor drives multiple stirring blades to rotate synchronously through the stirring shaft to speed up the flow rate of the raw material, thereby accelerating the synthesis rate of the raw material, and At the same time, the stirring shaft drives the scraper to rotate through the support plate, scraping off the raw materials attached to the inner wall of the synthesis tank, improving the mixing uniformity of the raw materials, and increasing the synthesis quality and speed of the prepolymer;

3. The use of the U-shaped mounting plate in conjunction with the rollers facilitates the movement of the synthetic device and improves the convenience of its use. At the same time, when moving, the use of the second spring can dampen the synthetic device and improve the Stability of the synthetic device.

Description of drawings

Fig. 1 is the structural representation of the present invention;

Fig. 2 is the bottom view of the synthetic tank of the present invention;

Fig. 3 is the sectional view of the sampling cylinder of the present invention;

Fig. 4 is the side view of the sampling cylinder of the present invention;

5 is an exploded view of the connecting block and the sample collection bottle of the present invention;

Among them: 1. Synthesis tank; 2. Feeding pipe; 3. Temperature display; 4. Main pipe; 5. Steam pipe; 6. Condensate water inlet pipe; 7. Motor; 8. Stirring shaft; 9. Stirring blade; 10. Scraper; 11. Supporting plate; 12. Motor holder; 13. Outlet pipe; 14. Sampling cylinder; 15. Sample collection bottle; 16. Push-pull plate; 17. Piston rod; 18. Connecting plate; 19. First spring ;20, U-shaped mounting plate; 21, roller; 22, second spring; 23, piston; 24, connecting block; 25, flowmeter; 26, observation window; 27, sampling hole; 28, first connecting pipe; 29 , the second connecting pipe; 30, the cavity.

Detailed ways

In order to make the technical means, creative features, achievement goals and effects realized by the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments, but the following embodiments are only preferred embodiments of the present invention, not all. Based on the examples in the implementation manner, other examples obtained by those skilled in the art without creative work shall fall within the protection scope of the present invention. The experimental methods in the following examples are conventional methods unless otherwise specified, and the materials, reagents, etc. used in the following examples can be obtained from commercial sources unless otherwise specified.

Example:

As shown in Figure 1, Figure 3, Figure 4 and Figure 5, the present invention provides a water-based polyurethane prepolymer synthesis device, comprising a feed pipe 2 arranged at the upper end of the synthesis tank 1 and an outlet pipe 13 at the lower end side thereof, The lower end surface of the synthesis tank 1 is provided with a sampling cylinder 14 communicating with its inner cavity, the sampling cylinder 14 is provided with a sampling hole 27 in the middle of one end side close to the synthesis tank 1, and a piston 23 is provided at one end of the inner cavity of the sampling cylinder 14 close to the sampling hole 27. 23 One end away from the sampling hole 27 is fixed with a piston rod 17, the other end of the piston rod 17 slides and extends to the outside of the sampling cylinder 14 and is fixed with a push-pull plate 16, and one end of the sampling cylinder 14 close to the push-pull plate 16 is symmetrically fixed at one end. The connecting plate 18, the two ends of the push-pull plate 16 and the connecting plate 18 are fixedly connected with a first spring 19, the lower end of the sampling cylinder 14 is provided with a sample collecting bottle 15 communicating with its inner cavity, and the sample collecting bottle 15 is connected to the sampling cylinder 14. Split connection, the surface of the sample collection bottle 15 is vertically provided with a transparent observation window 26, the lower end of the sampling cylinder 14 is provided with a connection block 24 integrally connected with it, and the lower side of the connection block 24 is fixed with a first connection pipe 28 , the outer peripheral surface of the first connecting pipe 28 is provided with an external thread, and the upper end of the sample collection bottle 15 is fixedly connected with a second connecting pipe 29 adapted to the first connecting pipe 28, and the inner peripheral surface of the second connecting pipe 29 is provided with an internal thread , the interior of the connection block 24 is provided with a flow sensor, and its surface is provided with a flow device 25 connected to the flow sensor;

When sampling the prepolymer, first pull the push-pull plate 16 outward, the push-pull plate 16 pulls the piston 23 through the piston rod 17 to move, the pressure inside the sampling cylinder 14 is lower than the external pressure, and the prepolymer is introduced into the sampling cylinder 14 from the sampling hole 27 , and with the movement of the piston 23, the prepolymer is introduced into the sample collection bottle 15 for storage, and at the same time, when the prepolymer is introduced into the sample collection bottle 15, the amount introduced is adjusted by the cooperation of the flow sensor and the flow device 25. Observation, to prevent the phenomenon that the amount derived is not enough for detection or the amount derived is too much waste, when the push-pull plate 16 is pushed toward one end of the sampling cylinder 14, cooperate with the use of the first spring 19 to increase the push rate. When the sample collection bottle 15 is disassembled, firstly rotate the sample collection bottle 15, and the second connecting pipe 29 at the upper end of the sample collecting bottle 15 rotates synchronously. The separation between the sample collection bottle 15 and the sample collection bottle 15 facilitates the disassembly of the sample collection bottle 15, improves the convenience of sampling the prepolymer, and has simple operation and high safety factor.

As shown in FIG. 1 , this embodiment discloses and further includes a motor 7 arranged in the middle of the upper side of the synthetic tank 1 . The outer end of the motor 7 is provided with a motor fixing seat 12 fixedly connected with the synthetic tank 1 , and the drive end bearing of the motor 7 is provided. It extends to the interior of the synthesis tank 1 and is connected with a stirring shaft 8. The surface of the stirring shaft 8 is fixed with a plurality of stirring blades 9 at equal distances. One side of the upper and lower ends of the stirring shaft 8 is fixed with a support plate 11, and the other end of the support plate A scraper 10 attached to the inner cavity wall of the synthetic tank 1 is connected;

The prepolymer raw material is first introduced into the inner cavity of the synthesis tank 1 through the feeding pipe 2, and then the motor 7 is controlled to work. At the same time, the stirring shaft 8 drives the scraper 10 to rotate through the support plate 11, scraping off the raw materials attached to the inner wall of the synthesis tank 1, improving the mixing uniformity of the raw materials, and increasing the synthesis quality and speed of the prepolymer.

As shown in FIG. 1 , this embodiment discloses that the synthesis tank 1 includes an inner tank and an outer tank, and a cavity 30 is formed between the inner tank and the outer tank. The upper end of the synthesis tank 1 is provided with a main pipe 4 communicating with the cavity 30 . , and the other end of the main pipe 4 is respectively connected with a steam pipe 5 and a condensed water introduction pipe 6 through a tee, and the surfaces of the steam pipe 5 and the condensed water introduction pipe 6 are all provided with a one-way valve, and the upper and lower ends of the synthesis tank 1 are also provided with The ventilation pipe and the drainage pipe communicated with the cavity 30, the inner cavity wall of the synthesis tank 1 is provided with a temperature sensor, and the upper side of the synthesis tank 1 is provided with a temperature display 3 electrically connected with the temperature sensor;

When initially synthesizing the raw materials, it needs to be completed at a moving temperature. First, the external steam is introduced into the cavity 30 through the steam pipe 5 to increase the temperature of the inner cavity of the synthesis tank 1, and a large amount of heat will be released along with the reaction of the raw materials. At this time, it is necessary to introduce the steam inside the cavity 30 through the ventilation pipe, and then cooperate with the use of the condensed water introduction pipe 6 to introduce the external condensed water into the interior of the cavity 30 to cool the interior of the synthesis tank 1 and improve the The use effect of the synthesis device improves the synthesis quality of the prepolymer, and at the same time cooperates with the use of the temperature sensor and the temperature display 3, it is convenient to observe the temperature of the inner cavity of the synthesis tank 1.

As shown in FIG. 2 , this embodiment discloses that the bottom side of the synthetic tank 1 is symmetrically provided with a U-shaped mounting plate 20 with a downward opening, the middle of the U-shaped mounting plate 20 is connected with a roller 21 , and the U-shaped mounting plate 20 is A second spring 22 is fixedly connected between the upper side and the bottom side of the synthetic tank 1;

The use of the U-shaped mounting plate 20 in conjunction with the roller 21 facilitates the movement of the synthesizing device and improves the convenience of its use. At the same time, when moving, the use of the second spring 22 has a shock-absorbing effect on the synthesizing device. Improve the stability of the synthesis device.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, and substitutions can be made in these embodiments without departing from the principle and spirit of the invention and modifications, the scope of the invention is defined by the appended claims and their equivalents.

Claims (10)

1. a water-based polyurethane prepolymer synthesis device, comprising a feed pipe (2) arranged at the upper end of a synthesis tank (1) and a lead-out pipe (13) on one side of its lower end, it is characterized in that: the synthesis tank (1) ) The lower end surface is provided with a sampling cylinder (14) communicating with its inner cavity, the sampling cylinder (14) is provided with a sampling hole (27) in the middle of one end side close to the synthesis tank (1), and the inner cavity of the sampling cylinder (14) One end close to the sampling hole (27) is provided with a piston (23), one end of the piston (23) away from the sampling hole (27) is fixedly connected with a piston rod (17), and the other end of the piston rod (17) slides and extends to the A push-pull plate (16) is fixedly connected to the outside of the sampling cylinder (14), the lower end of the sampling cylinder (14) is provided with a sample collection bottle (15) communicating with its inner cavity, and the sample collection bottle (15) is connected to the sampling cylinder (14) Split connection. 2. A water-based polyurethane prepolymer synthesis device according to claim 1, characterized in that: a connecting plate (18) is symmetrically fixed to one end of the outer periphery of the sampling cylinder (14) close to the push-pull plate (16), A first spring (19) is fixedly connected between the two ends of the push-pull plate (16) and the connecting plate (18). 3. A water-based polyurethane prepolymer synthesis device according to claim 1, characterized in that: the lower end of the sampling cylinder (14) is provided with a connecting block (24) integrally connected with it, and the connecting block ( 24) A first connecting pipe (28) is fixedly connected to the lower side, the outer peripheral surface of the first connecting pipe (28) is provided with an external thread, and the upper end of the sample collecting bottle (15) is fixedly connected with the first connecting pipe (28). 28) An adapted second connecting pipe (29), wherein the inner peripheral surface of the second connecting pipe (29) is provided with an internal thread. 4. The device for synthesizing an aqueous polyurethane prepolymer according to claim 1, wherein a transparent observation window (26) is vertically disposed on the surface of the sample collection bottle (15). 5. A water-based polyurethane prepolymer synthesis device according to claim 1, characterized in that it further comprises a motor (7) arranged in the middle of the upper side of the synthesis tank (1), and the outer end of the motor (7) A motor fixing seat (12) fixedly connected with the synthesis tank (1) is provided, the drive end bearing of the motor (7) extends into the interior of the synthesis tank (1), and a stirring shaft (8) is connected in a driving manner, and the stirring shaft ( 8) A plurality of stirring blades (9) are fixedly fixed on the surface at equal distances. 6. A water-based polyurethane prepolymer synthesis device according to claim 5, characterized in that: one side of the upper and lower ends of the stirring shaft (8) is fixed with a support plate (11), and the support plate (11) A scraper (10) fitted with the inner cavity wall of the synthetic tank (1) is fixedly connected to the other end of the squeegee. 7. A water-based polyurethane prepolymer synthesis device according to claim 1, wherein the synthesis tank (1) comprises an inner tank and an outer tank, and a cavity (30) is formed between the inner tank and the outer tank. ), the upper end of the synthesis tank (1) is provided with a main pipe (4) communicating with the cavity (30), and the other end of the main pipe (4) is respectively connected with a steam pipe (5) and a condensed water introduction pipe through a tee (6), and the surfaces of the steam pipe (5) and the condensed water introduction pipe (6) are all provided with a one-way valve, and the upper and lower ends of the synthesis tank (1) are also provided with a ventilation pipe that communicates with the cavity (30) and drain. 8. A water-based polyurethane prepolymer synthesis device according to claim 7, characterized in that: the inner cavity wall of the synthesis tank (1) is provided with a temperature sensor, and the upper side of the synthesis tank (1) is provided with A temperature display (3) to which the temperature sensor is electrically connected. 9. A water-based polyurethane prepolymer synthesis device according to claim 3, characterized in that: the connecting block (24) is provided with a flow sensor inside, and its surface is provided with a flow device ( 25). 10. A water-based polyurethane prepolymer synthesis device according to claim 1, characterized in that: the bottom side of the synthesis tank (1) is symmetrically provided with a U-shaped mounting plate (20) with a downward opening, the A roller (21) is connected to the middle of the U-shaped mounting plate (20), and a second spring (22) is fixedly connected between the upper side of the U-shaped mounting plate (20) and the bottom side of the synthetic tank (1).

Images