CN223362077U

CN223362077U - A polyurethane foaming experimental device

Info

Publication number: CN223362077U
Application number: CN202422455426.8U
Authority: CN
Inventors: 陈子颖; 刘钊宇; 张世勋; 曹伟
Original assignee: Zhengzhou University
Current assignee: Zhengzhou University
Priority date: 2024-10-11
Filing date: 2024-10-11
Publication date: 2025-09-19
Anticipated expiration: 2034-10-11

Abstract

The utility model belongs to the technical field of foaming, and particularly relates to a polyurethane foaming experimental device which comprises a foaming box, a base, a mixing barrel, stirring rods and a monitoring system, wherein the foaming box is of an open structure, a top support is arranged at the open position and used for foaming polyurethane foam materials, the base is fixedly arranged on the top support of the foaming box and used for containing and heating the foam materials, the mixing barrel is arranged in the base in a lifting manner and used for adding different foam materials, the stirring rods are nested in the mixing barrel, when the mixing barrel is lifted, the stirring rods stir the foam materials in the base, and the monitoring system is used for measuring various data in the polyurethane foaming process in real time. The polyurethane foaming experimental device integrates the steps of batching, mixing, heating, injecting and foaming, is simple and convenient to operate, and can measure a plurality of data in the foaming process of the foam.

Description

Polyurethane foaming experimental device

Technical Field

The utility model belongs to the technical field of foaming, and particularly relates to a polyurethane foaming experimental device.

Background

Polyurethane foaming reactions are a rapid, real-time changing process. During the foaming process, the morphology of the polyurethane foam changes rapidly and releases a large amount of heat. In order to obtain the material parameters, foaming experiments are required. When the foaming experiment is carried out, the common operation table can not realize the mixing and foaming operation at the same time, and the foaming process data of the foam material is comprehensively recorded in real time.

The prior art Chinese patent publication No. CN112666204A discloses a thermal expansion foaming tester and a testing method thereof, which can only measure one data of the foaming height of a sample.

Disclosure of Invention

The utility model aims to solve the problems that the measurement data obtained in the prior polyurethane foaming experiment are imperfect and the mixing and foaming operation cannot be carried out simultaneously, and provides a polyurethane foaming experiment device which integrates the steps of batching, mixing, heating, material injection and foaming, is simple and convenient to operate and can measure a plurality of data in the foaming process of foam materials.

In order to achieve the above purpose, the technical scheme adopted is as follows:

The utility model provides a polyurethane foaming experimental device, which comprises:

The foaming box is of an open structure, and a top bracket is arranged at the open position and used for foaming polyurethane foam;

The base is fixedly arranged on the top support of the foaming box and used for containing and heating the foaming material;

the mixing barrel is arranged in the base in a lifting manner and used for adding different foam materials;

The stirring rod is nested in the mixing barrel, and when the mixing barrel is lifted, the stirring rod stirs the foam in the base;

and the monitoring system is used for measuring various data in the polyurethane foaming process in real time.

According to the polyurethane foaming experimental device, the interior of the mixing barrel is uniformly divided into a plurality of chambers by the partition boards, the middle lower part of each partition board is provided with the caulking groove, a through hole is formed at the joint of all the partition boards, and the caulking groove of each partition board is communicated with the through hole.

According to the polyurethane foaming experimental device, the outer diameter of the mixing barrel is smaller than the inner diameter of the base, and each cavity of the mixing barrel is carved with a graduated scale.

According to the polyurethane foaming experimental device, a handle is arranged at the top end of the stirring rod, the stirring rod penetrates through the through hole in the center of the mixing barrel, stirring blades are arranged at the lower part of the stirring rod, and the stirring blades are contained in the caulking grooves of each partition plate before stirring.

According to the polyurethane foaming experimental device, further, the bottom end of the stirring rod is provided with the round plunger, the center of the base is provided with the round hole of the base, and the round plunger is filled in the round hole of the base before material injection.

According to the polyurethane foaming experimental device, further, the top support is provided with the support round hole, the support round hole is concentric with the base round hole, and the diameter of the support round hole is larger than that of the base round hole.

According to the polyurethane foaming experimental device, the outer wall of the base is further wrapped with a circle of heating belt.

According to the polyurethane foaming experimental device, an L-shaped fixing support is arranged at the top of one side plate of the foaming box, a rotating motor is hung at the tail end of the horizontal part of the fixing support, and the output end of the rotating motor is fixedly connected with the handle of the stirring rod.

According to the polyurethane foaming experimental device, a plurality of adjusting holes are formed in the vertical portion of the fixing support, a connecting support is fixedly arranged on the outer wall, close to the fixing support, of the mixing barrel, and the connecting support is inserted into any adjusting hole.

According to the polyurethane foaming experimental device, the monitoring system further comprises a laser range finder, a thermal imager, a weighing sensor and a control computer, wherein the laser range finder and the thermal imager are arranged on a top support of the foaming box, the weighing sensor is arranged on a bottom plate of the foaming box, and the laser range finder, the thermal imager and the weighing sensor transmit measured data to the control computer.

By adopting the technical scheme, the beneficial effects are that:

1. The polyurethane foaming experimental device integrates the steps of batching, mixing, heating, injecting and foaming, can realize the full mixing of various foaming materials, is injected into the foaming box for foaming the polyurethane foaming materials, and has the advantages of high integration level, low cost, simple and convenient operation and reduction of occupation of an experimental field.

2. In order to perform simulation analysis of polyurethane in a foaming box, foaming experiments are required to be performed on foam materials to obtain material parameters. When the polyurethane foaming experiment is carried out, the weight, shape, temperature and height data of the foam material in the foaming process are measured in real time through a laser range finder, a thermal imager and a weighing sensor, and all data in the foaming process are comprehensively recorded, so that experimenters can know the shape change of the foam material in the foaming process.

Drawings

In order to more clearly illustrate the technical solution of the embodiments of the present utility model, the following description will briefly explain the drawings of the embodiments of the present utility model. Wherein the showings are for the purpose of illustrating some embodiments of the utility model only and not for the purpose of limiting the same.

FIG. 1 is a schematic structural view of a polyurethane foaming experimental apparatus according to an embodiment of the present utility model;

FIG. 2 is a schematic view of a mixing bowl and base according to an embodiment of the utility model;

FIG. 3 is a schematic view of the installation of a stirring rod according to an embodiment of the present utility model;

FIG. 4 is a schematic illustration of the location of a pre-mix bowl and base of an embodiment of the utility model;

FIG. 5 is a schematic view of the structure of a foaming box according to an embodiment of the present utility model;

FIG. 6 is a schematic view showing a state when the foaming box is cleaned according to the embodiment of the present utility model;

fig. 7 is a schematic diagram of a monitoring system according to an embodiment of the utility model.

The meaning represented by the numbers in the figures is:

1. The device comprises a foaming box, 101, side plates, 102, a bottom plate, 2, a top bracket, 3, a base, 4, a mixing barrel, 5, a stirring rod, 6, a baffle plate, 7, a caulking groove, 8, a through hole, 9, a handle, 10, a stirring blade, 11, a round plunger, 12, a bracket round hole, 13, a heating belt, 14, a fixed bracket, 15, a rotary motor, 16, a regulating hole, 17, a connecting bracket, 18, a laser range finder, 19, a thermal imager and 20, and a control computer.

Detailed Description

An exemplary embodiment of the present utility model will be described more fully hereinafter with reference to the accompanying drawings, in which embodiments of the utility model are shown. Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art.

As shown in fig. 1 and 2, this embodiment discloses a polyurethane foaming experimental apparatus, which includes a foaming box 1, a base 3, a mixing barrel 4, a stirring rod 5 and a monitoring system. The foaming box 1 is of an open structure, a T-shaped top support 2 is welded at the open position, the foaming box 1 is mainly used for foaming polyurethane foam, a base 3 is fixedly arranged on the top support 2 of the foaming box 1, the base 3 is mainly used for containing and heating the foam, a mixing barrel 4 is arranged in the base 3 in a lifting mode, the mixing barrel 4 is mainly used for adding different foam materials, stirring rods 5 are nested in the mixing barrel 4, when the mixing barrel 4 is lifted, the stirring rods 5 stir the foam materials in the base 3, and a monitoring system is used for measuring various data such as foam weight, shape, temperature and height in the polyurethane foaming process in real time.

The inside of the mixing barrel 4 is evenly divided into a plurality of chambers by the baffle plates 6 and is used for separating different foam materials before stirring, in the embodiment, the mixing barrel is divided into four chambers, and no more than four foam materials can be added simultaneously for mixing, so that no interference between the foam materials is ensured before mixing. Preferably, each chamber of the mixing barrel 4 is carved with a graduated scale for controlling the use amount of the foam material and the proportion of different foam materials.

The middle lower part of each baffle plate 6 is provided with a caulking groove 7, a through hole 8 is formed at the joint of all baffle plates 6, and the caulking groove 7 of each baffle plate 6 is communicated with the through hole 8.

As shown in fig. 4, the outer diameter of the mixing bowl 4 is smaller than the inner diameter of the base 3 so that, during charging, the mixing bowl 4 is embedded in the base 3 and sits on the bottom plate of the base 3.

The top end of the stirring rod 5 is provided with a handle 9, the foam material can be stirred by holding the handle 9 by hand, and the foam material can be automatically stirred by connecting a power mechanism. As shown in fig. 3, the stirring rod 5 passes through the through hole 8 in the center of the mixing bowl 4, the stirring blade 10 is provided at the lower part of the stirring rod 5, and the stirring blade 10 is accommodated in the caulking groove 7 of each partition 6 before stirring, and it is understood that the number of the stirring blades 10 is identical to that of the partition 6. The bottom end of the stirring rod 5 is provided with a round plunger 11, the center of the base 3 is provided with a base round hole, the round plunger 11 is always filled in the base 3 round hole before material injection, insufficient stirring of foam materials is avoided from leaking downwards, the stirring rod 5 is lifted after stirring is completed, and the foam materials fall from the base round hole.

As shown in fig. 5, the top bracket 2 of the foaming box 1 is provided with a bracket round hole 12, the bracket round hole 12 is concentric with the base round hole, and the diameter of the bracket round hole 12 is larger than that of the base round hole, so that smooth material injection into the foaming box 1 is not affected.

The outer wall of the base 3 is wrapped with a circle of heating belt 13, and the heating belt 13 is used for heating the base 3, so that the foam is heated to a set temperature, and the influence of the temperature on the reaction result is eliminated. Preferably, a temperature sensor can be arranged on the inner wall of the base 3 and used for monitoring whether the temperature of the foam reaches the set temperature in real time.

An L-shaped fixing support 14 is arranged at the top of one side plate of the foaming box 1, and the fixing support 14 is used for fixing a rotary motor 15. A rotary motor 15 is hung at the tail end of the horizontal part of the fixed support 14, the output end of the rotary motor 15 is fixedly connected with the handle 9 of the stirring rod 5, the stirring rod 5 is electrically rotated, and the stirring speed is improved. Further, the fixed support 14 and the rotary motor 15 may be connected by a telescopic rod, so that when the stirring rod 5 needs to be lifted, the telescopic rod shortens to reserve a displacement space for the stirring rod 5.

The fixed support 14 is also used to adjust the height of the mixing bowl 4. The vertical part of the fixed support 14 is provided with a plurality of adjusting holes 16, the outer wall of the mixing barrel 4, which is close to the fixed support 14, is welded with a connecting support 17, and the connecting support 17 is inserted into any adjusting hole 16. Preferably, the connecting bracket 17 is provided with a threaded section, and when the mixing bowl 4 is lifted, the threaded section of the connecting bracket 17 slides along the vertical portion of the fixed bracket 14, then is inserted into the adjusting hole 16 of the corresponding height, and finally is locked and fixed by using a double nut. The fixing bracket 14 of this embodiment adopts a channel steel.

As shown in fig. 7, the monitoring system comprises a laser range finder 18, a thermal imager 19, a weighing sensor and a control computer 20, wherein the laser range finder 18 and the thermal imager 19 are arranged on a top support 2 of the foaming box 1, the weighing sensor is arranged on a bottom plate 102 of the foaming box 1, and the laser range finder 18, the thermal imager 19 and the weighing sensor transmit measured data to the control computer 20. The laser rangefinder 18 is used to measure the foam height, the thermal imager 19 is used to measure the imaging shape and the temperature of each part, and the load cell is used to measure the weight change from the addition of the mixed foam to the foaming box 1, so that the foam loss during foaming can be determined.

The working principle is as follows:

Different foam materials are poured into each cavity of the mixing barrel 4 according to a proportion, after the material feeding is finished, the mixing barrel 4 is lifted and fixed to a designated position, at the moment, the stirring blade 10 is completely exposed out of the caulking groove 7 of the partition plate 6, the rotating motor 15 and the heating belt 13 are started, the stirring blade 10 rotates to stir the foam materials, the raw materials are uniformly mixed, and the heating belt 13 stops heating after heating the foam materials to a set temperature. After the mixing is completed, the stirring rod 5 is lifted, and the mixed foam falls into the lower foaming box 1 from the round hole of the base to start foaming. During foaming, the laser rangefinder 18, thermal imager 19 and load cell record the foam weight, shape, temperature and height.

As shown in fig. 6, after the experiment is completed, the side plate 101 of the foaming box is opened, the bottom plate 102 of the foaming box is drawn out, foam on the bottom plate 102 is cleaned, the bottom plate 102 is replaced after the cleaning is completed, and the side plate 101 is closed.

It should be noted that when an element is referred to as being "connected," "coupled," or "connected" to another element, it can be directly connected, coupled, or connected, but it is to be understood that there may be intermediate elements therebetween, i.e., positional relationship of direct connection and indirect connection is contemplated.

It should be noted that the use of the terms "a" or "an" and the like do not necessarily denote a limitation of quantity. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items.

It should be noted that terms like "upper", "lower", "left", "right", and the like, which indicate an orientation or a positional relationship, are merely used to indicate a relative positional relationship, and are for convenience of describing the present utility model, and the apparatus or element must not necessarily have a specific orientation, be constructed and operated in a specific orientation, and the relative positional relationship may be changed when the absolute position of the object to be described is changed.

Preferred embodiments for carrying out the utility model have been described in detail hereinabove, but it should be understood that these embodiments are merely illustrative and are not intended to limit the scope, applicability or configuration of the utility model in any way. The scope of the utility model is defined by the appended claims and equivalents thereof. Many modifications and variations of the foregoing embodiments will be apparent to those of ordinary skill in the art in light of the teachings of this utility model, which will fall within the scope of this utility model.

Claims

1. A polyurethane foaming experimental device, characterized in that it comprises:

The foaming box is an open structure with a top support provided at the open portion for foaming polyurethane foam;

A base, which is fixedly arranged on the top bracket of the foaming box and is used for containing and heating the foaming material;

A mixing barrel, which is movably arranged in the base and is used for adding different foaming materials;

A stirring rod is nested in the mixing barrel, and when the mixing barrel is raised, the stirring rod stirs the foam material in the base;

And a monitoring system for real-time measurement of various data during the polyurethane foaming process.

2. The polyurethane foaming experimental device according to claim 1 is characterized in that the interior of the mixing barrel is evenly divided into multiple chambers by partitions, each partition has a embedding groove in the lower part, and a through hole is formed at the junction of all partitions, and the embedding groove of each partition is connected to the through hole.

3. The polyurethane foaming experimental device according to claim 2, characterized in that the outer diameter of the mixing barrel is smaller than the inner diameter of the base; and each chamber of the mixing barrel is engraved with a scale.

4. The polyurethane foaming experimental device according to claim 2 is characterized in that a handle is provided at the top of the stirring rod, the stirring rod passes through the through hole in the center of the mixing barrel, and a stirring blade is provided at the bottom of the stirring rod, which is received in the embedded groove of each partition before stirring.

5. The polyurethane foaming experimental device according to claim 4, characterized in that a cylindrical plug is provided at the bottom end of the stirring rod, a base circular hole is opened in the center of the base, and the cylindrical plug is filled in the base circular hole before injection.

6. The polyurethane foaming experimental device according to claim 5, characterized in that a bracket circular hole is opened on the top bracket, the bracket circular hole is concentric with the base circular hole, and the bracket circular hole has a larger diameter than the base circular hole.

7. The polyurethane foaming experimental device according to claim 1, characterized in that the outer wall of the base is wrapped with a circle of heating belt.

8. The polyurethane foaming experimental device according to claim 4 is characterized in that an L-shaped fixing bracket is provided on the top of one side panel of the foaming box, a rotating motor is hung at the end of the horizontal part of the fixing bracket, and the output end of the rotating motor is connected and fixed to the handle of the stirring rod.

9. The polyurethane foaming experimental device according to claim 8 is characterized in that a plurality of adjustment holes are opened on the vertical portion of the fixed bracket; a connecting bracket is fixedly provided on the outer wall of the mixing barrel close to the fixed bracket, and the connecting bracket is inserted into any of the adjustment holes.

10. The polyurethane foaming experimental device according to claim 1 is characterized in that the monitoring system includes a laser rangefinder, a thermal imager, a weighing sensor and a control computer, the laser rangefinder and thermal imager are installed on the top bracket of the foaming box, and the weighing sensor is arranged on the bottom plate of the foaming box, and the laser rangefinder, thermal imager and weighing sensor transmit the measured data to the control computer.