Raw material adding device for polyurethane foam production

Abstract

The utility model discloses a raw material adding device for polyurethane foam production, which belongs to the technical field of raw material adding devices, and comprises a front half shell, a rear half shell, fixed ring groups clamped in the front half shell and the rear half shell, and an elastic inner wall group clamped and fixed between the fixed ring groups, an air chamber, a front air pipe and a rear air pipe are defined by the elastic inner wall set, the front half shell and the rear half shell. According to the technical scheme, the front air pipe and the rear air pipe are connected with two sets of external air pumps in a sealed mode respectively, the air pumps work, air is inflated into the air chamber or air in the air chamber is exhausted through the front air pipe and the rear air pipe at the same time, then the elastic inner wall set can expand and contract periodically, and the powder raw materials are pushed and pulled to a large extent within a large range; most material arches can be quickly eliminated in an extremely short time, and an effective arch breaking effect can still be achieved when the water content of raw materials is high and the cohesive force between powder is further increased.

Description

Technical Field

[0001] The utility model relates to the technical field of raw material adding devices, in particular to a raw material adding device for polyurethane foam production. Background Art

[0002] Polyurethane foam is a high molecular polymer mainly made of isocyanate and polyether. Under the action of various additives such as foaming agents, catalysts, and flame retardants, it is mixed by special equipment and foamed on-site by high-pressure spraying. There are two types of polyurethane foams, soft foams and hard foams. Among them, soft foams have an open-cell structure, and hard foams have a closed-cell structure. Soft foams are further divided into two types: skinned and non-skinned. The main function of polyurethane soft foam is buffering, and it is commonly used in sofa furniture, pillows, seat cushions, toys, clothing, and sound insulation linings. In the production process of polyurethane foam, various powdery additives need to be added, so a raw material adding device is required to assist the preparation process.

[0003] When storing powdery raw materials, the phenomenon of material arching is likely to occur. Material arching refers to the phenomenon that the material forms a dome shape at the discharge port of the silo, hindering the discharge of materials. When the material is discharged from the silo, due to the frictional force and adhesive force between the particles and between the particles and the inner wall of the silo, a dome is formed at the discharge port, blocking the discharge port and making it difficult to discharge the materials. Although there are measures such as blowing to break the arch, its action range is usually limited, and the material arches far away from the blowing area may still be difficult to break in time, and it is impossible to quickly and effectively remove a large range of material arches at one time. Especially when the water content of the raw material is relatively high, which further increases the adhesive force between the powders. Therefore, in view of the above problems, a raw material adding device for polyurethane foam production is proposed. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide a raw material adding device for polyurethane foam production. The raw material adding device can make the elastic inner wall group expand and contract periodically through the change of air pressure, and then exert a large-scale pushing and pulling effect on the powdery raw materials. It can quickly eliminate most of the material arches within a very short time, and still be able to play an effective arch-breaking role when the water content of the raw material is relatively high, which further increases the adhesive force between the powders, ensuring the smoothness of the discharge, and solving the technical problems that the existing raw material adding device is difficult to quickly and effectively remove a large range of material arches at one time, especially when the water content of the raw material is relatively high, it is more difficult to effectively remove the material arches.

[0005] The technical solution adopted by the embodiments of the present application to solve its technical problems is:

[0006] A raw material adding device for producing polyurethane foam, comprising a front half shell and a rear half shell. Ring-shaped protrusions are formed on both of the above-mentioned components. A fixed ring group is clamped inside the front half shell and the rear half shell. An elastic inner wall group is clamped and fixed between the fixed ring groups. Among them, an air chamber is formed by enclosing between the elastic inner wall group and the front half shell and the rear half shell. A number of front air pipes communicating with the air chamber are fixedly arranged on the front half shell, and a number of rear air pipes communicating with the air chamber are fixedly arranged on the rear half shell.

[0007] Through the above structural form, the front air pipe and the rear air pipe are respectively hermetically connected to two external air pumps. With the operation of the air pumps, air is simultaneously filled into the air chamber or the air in the air chamber is discharged through the front air pipe and the rear air pipe. As a result, the elastic inner wall group can periodically expand and contract, exerting a large-scale pushing and pulling effect on the powder raw materials, capable of quickly eliminating most of the material arches within an extremely short time. Even when the water content of the raw materials is relatively high, leading to an increase in the cohesive force between the powders, it can still play an effective role in breaking the arches. Moreover, the elastic inner wall group is clamped and fixed inside the front half shell and the rear half shell by the fixed ring group, which is convenient for replacing and maintaining the damaged and ineffective parts of the elastic inner wall group.

[0008] In a possible implementation manner, the elastic inner wall group includes a first cylindrical inner wall, a second cylindrical inner wall, and a funnel-shaped inner wall. All of the above three are made of elastic materials, and the middle part of the overall structure of the three is concave in the normal state.

[0009] Through the above structural form, three independent arch-breaking regions can be formed, covering a relatively large arch-breaking space. And because the above three are independent of each other, when a certain part is damaged, it can be replaced separately without replacing the entire elastic inner wall group, which can avoid waste of resources and reduce the use cost.

[0010] In a possible implementation manner, an air chamber is formed by enclosing between the concave parts of the first cylindrical inner wall and the second cylindrical inner wall and the ring-shaped protrusion, and an air chamber is formed by enclosing between the concave part of the funnel-shaped inner wall and the bottoms of the front half shell and the rear half shell.

[0011] Through the above structural form, the middle parts of the first cylindrical inner wall and the second cylindrical inner wall can have a relatively large deformation space, and by deforming to a large extent, the effect of breaking the material arch can be improved, enhancing the arch-breaking effect.

[0012] In a possible implementation manner, the fixed ring group includes an upper pressing ring, a first middle pressing ring, a second middle pressing ring, and a lower friction ring. The above four are made of hard materials, and the outer walls of all of them can be in close contact with the inner walls of the front half shell and the rear half shell.

[0013] Through the above structural form, the two ends of the three parts of the elastic inner wall group can be limited and fixed by the above four, so that the overall elastic inner wall group can be fixed at a specified position to play a role.

[0014] In a possible implementation, the upper pressure ring, the first medium pressure ring and the second medium pressure ring are each provided with one or two clamping grooves, a sealed gasket is fixedly installed in the clamping groove, and an annular clamping protrusion is fixedly installed on the outer wall of the upper pressure ring, the first medium pressure ring and the second medium pressure ring.

[0015] Through the above-mentioned structural form, the various parts of the fixing ring group can clamp the two ends of the various parts of the elastic inner wall group, and the sealed gasket can ensure the air tightness of the two ends of the various parts of the elastic inner wall group to avoid air leakage, and the annular clamping protrusion can generate greater friction between the front half shell and the rear half shell to improve the fixing effect.

[0016] In a possible implementation, a clamping ring is fixedly provided on the inner walls of the ends of the first cylindrical inner wall, the second cylindrical inner wall, and the funnel-shaped inner wall overlapping the fixing ring assembly.

[0017] The above-mentioned structural form provides the necessary structural basis for the clamping and fixing of the various parts of the elastic inner wall group.

[0018] In a possible implementation, connecting ears are fixedly provided on both sides of the front half shell and the rear half shell, and the front half shell and the rear half shell are fixedly connected to form a barrel body by means of bolts passing through the connecting ears. The barrel body formed by the front half shell and the rear half shell is covered with a top cover, and a feeding port is provided on the top cover, and a cover is provided on the feeding port.

[0019] With the above-mentioned structural form, raw materials can be added into the barrel through the feeding port for storage, so as to facilitate the subsequent adding process.

[0020] In a possible implementation, a discharge pipe is threadedly connected to the bottom of the barrel body formed by the front half shell and the rear half shell, and a powder butterfly valve is fixedly connected to the bottom of the discharge pipe.

[0021] Through the above-mentioned structural form, the powder butterfly valve can be used to control the discharge rate and discharge amount, thereby meeting different addition requirements.

[0022] In summary, the utility model includes the following beneficial technical effects:

[0023] The front air pipe and the rear air pipe are respectively connected to two sets of external air pumps in a closed manner. With the operation of the air pump, the air in the air chamber is inflated or discharged through the front air pipe and the rear air pipe at the same time, so that the elastic inner wall group can swell and shrink periodically, and perform a large-scale pushing and pulling effect on the powder raw materials in a large range, which can quickly eliminate most of the material arches in a very short time, and can still play an effective arch-breaking role when the moisture content of the raw materials is high and the bonding force between the powders is further increased; at the same time, the elastic inner wall group includes multiple independent components, and each part is clamped and fixed in the front half shell and the rear half shell by a fixing ring group, which can facilitate the replacement and maintenance of damaged and failed parts of the elastic inner wall group. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0025] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0026] Figure 2 It is a schematic diagram of the internal structure of the utility model;

[0027] Figure 3 It is a schematic diagram of the fixed ring group and the elastic inner wall group of the utility model;

[0028] Figure 4 It is a schematic diagram of a partial clamping structure formed by a fixing ring group and an elastic inner wall group of the utility model.

[0029] In the figure: 11, front half shell; 111, front air pipe; 12, rear half shell; 121, rear air pipe; 13, connecting ear; 14, discharge pipe; 15, powder butterfly valve; 16, top cover; 17, feeding port; 171, mouth cover; 101, annular protrusion; 2, fixing ring group; 21, upper pressure ring; 22, first medium pressure ring; 23, second medium pressure ring; 24, lower friction ring; 201, clamping groove; 202, sealing gasket; 203, annular clamping protrusion; 3, elastic inner wall group; 31, first cylindrical inner wall; 32, second cylindrical inner wall; 33, funnel-shaped inner wall; 301, clamping ring; 4, air chamber. DETAILED DESCRIPTION

[0030] The technical solution in the embodiment of the present application is to solve the problems of the above-mentioned background technology, and the overall idea is as follows:

[0031] like Figure 1 - Figure 2As shown in the figure, a raw material adding device for the production of polyurethane foam provided in this embodiment includes a front half shell 11 and a rear half shell 12. Ring-shaped protrusions 101 are formed on both of the above-mentioned components. A fixed ring group 2 is clamped inside the front half shell 11 and the rear half shell 12. An elastic inner wall group 3 is clamped and fixed between the fixed ring groups 2. Among them, an air chamber 4 is formed by enclosing between the elastic inner wall group 3 and the front half shell 11 and the rear half shell 12. A number of front air pipes 111 communicating with the air chamber 4 are fixedly arranged on the front half shell 11, and a number of rear air pipes 121 communicating with the air chamber 4 are fixedly arranged on the rear half shell 12. Through the above structural form, the front air pipes 111 and the rear air pipes 121 are respectively hermetically connected to two external air pumps. With the operation of the air pumps, air is simultaneously filled into the air chamber 4 or the air in the air chamber 4 is discharged through the front air pipes 111 and the rear air pipes 121, so that the elastic inner wall group 3 can periodically expand and contract, and a large-range and large-amplitude pushing and pulling action can be carried out on the powder raw materials, most of the material arches can be quickly eliminated in a very short time, and an effective arch-breaking effect can still be exerted when the moisture content of the raw materials is relatively high, resulting in a further increase in the cohesive force between the powders.

[0032] At the same time, the elastic inner wall group 3 is clamped and fixed inside the front half shell 11 and the rear half shell 12 by the fixed ring group 2, which is convenient for replacing and maintaining the damaged and ineffective parts in the elastic inner wall group 3.

[0033] As Figure 2 - Figure 3 As shown in the figure, the elastic inner wall group 3 includes a first cylindrical inner wall 31, a second cylindrical inner wall 32, and a funnel-shaped inner wall 33. The above three are all made of elastic materials, and the middle part of the overall structure of the three is concave in the normal state. Through the above structural form, three independent arch-breaking regions can be formed to cover a relatively large arch-breaking space. And because the above three are independent of each other, when a certain part is damaged, it can be replaced separately without replacing the entire elastic inner wall group 3, which can avoid waste of resources and reduce the use cost.

[0034] At the same time, an air chamber 4 is formed by enclosing between the concave parts of the first cylindrical inner wall 31 and the second cylindrical inner wall 32 and the ring-shaped protrusions 101, and an air chamber 4 is formed by enclosing between the concave part of the funnel-shaped inner wall 33 and the bottoms of the front half shell 11 and the rear half shell 12. Through the above structural form, the middle parts of the first cylindrical inner wall 31 and the second cylindrical inner wall 32 can have a relatively large deformation space, and the arch-breaking effect can be improved by a large-amplitude deformation to enhance the arch-breaking effect.

[0035] As Figure 3As shown, the fixed ring group 2 includes an upper pressing ring 21, a first middle pressing ring 22, a second middle pressing ring 23, and a lower friction ring 24. The above four are made of hard materials and the outer walls of all of them can be in close contact with the inner walls of the front half shell 11 and the rear half shell 12. Through the above structural form, the two ends of the three parts of the elastic inner wall group 3 can be limited and fixed by the above four, so that the elastic inner wall group 3 as a whole can be fixed at a specified position to play a role.

[0036] As Figure 4 shown, one or two card slots 201 are provided on the upper pressing ring 21, the first middle pressing ring 22, and the second middle pressing ring 23. A sealing gasket 202 is fixedly arranged in the card slots 201, and annular clamping protrusions 203 are fixedly arranged on the outer walls of the upper pressing ring 21, the first middle pressing ring 22, and the second middle pressing ring 23. In addition, clamping rings 301 are fixedly arranged on the inner walls of the ends where the first cylindrical inner wall 31, the second cylindrical inner wall 32, and the funnel-shaped inner wall 33 overlap with the fixed ring group 2. Through the above structural form, each part of the fixed ring group 2 can clamp the two ends of each part of the elastic inner wall group 3, and the sealing gasket 202 can ensure the airtightness of the two ends of each part of the elastic inner wall group 3 to avoid air leakage, while the annular clamping protrusions 203 can generate a large frictional force between the front half shell 11 and the rear half shell 12 to improve the fixing effect.

[0037] As Figure 1 shown, connecting ears 13 are fixedly arranged on both sides of the front half shell 11 and the rear half shell 12. The front half shell 11 and the rear half shell 12 are fixedly connected into a barrel by means of bolts passing through the connecting ears 13. A top cover 16 is covered on the barrel formed by the front half shell 11 and the rear half shell 12. A feeding port 17 is arranged on the top cover 16, and a cover 171 is covered on the feeding port 17. Through the above structural form, raw materials can be added into the barrel through the feeding port 17 for storage, so as to facilitate the subsequent addition process.

[0038] As Figure 1 shown, a discharge connecting pipe 14 is threadedly connected to the bottom of the barrel formed by the front half shell 11 and the rear half shell 12. A powder butterfly valve 15 is fixedly connected to the bottom of the discharge connecting pipe 14. Through the above structural form, the discharge rate and discharge amount can be controlled by the powder butterfly valve 15, so as to meet different addition requirements.

[0039] The working principle and working process of the present utility model:

[0040] The front air duct 111 and the rear air duct 121 are respectively hermetically connected to two sets of external air pumps. With the operation of the air pumps, air is simultaneously filled into the air chamber 4 or the air in the air chamber 4 is discharged through the front air duct 111 and the rear air duct 121, so that the elastic inner wall group 3 can periodically expand and contract, exerting a large-range and large-amplitude pushing and pulling action on the powder raw materials, being able to quickly eliminate most of the material arches in a very short time, and still being able to play an effective arch-breaking role when the water content of the raw materials is relatively high, resulting in a further increase in the cohesive force between the powders.

[0041] Meanwhile, the elastic inner wall group 3 includes multiple independent components, including the first cylindrical inner wall 31, the second cylindrical inner wall 32, and the funnel-shaped inner wall 33, and the fixing ring group 2 also includes multiple independent components, including the upper pressing ring 21, the first middle pressing ring 22, the second middle pressing ring 23, and the lower friction ring 24. Each part of the elastic inner wall group 3 is clamped and fixed in the front half shell 11 and the rear half shell 12 by each part of the fixing ring group 2. When one of the parts of the fixing ring group 2 or the elastic inner wall group 3 is damaged and fails, it is convenient to separately replace and maintain the damaged and failed part, thereby avoiding waste of resources and reducing the use cost.

[0042] Finally, it should be noted that: Obviously, the above embodiments are only examples for clearly illustrating the present invention, rather than limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or variations can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. And the obvious changes or variations derived therefrom are still within the protection scope of the present invention.

Claims

1. A raw material adding device for polyurethane foam production, characterized in that: include: The front half shell (11) and the rear half shell (12), both of which are processed to form an annular protrusion (101); A fixing ring assembly (2) which is clamped in the front half shell (11) and the rear half shell (12); An elastic inner wall group (3) is clamped and fixed between the fixing ring groups (2); The elastic inner wall group (3) and the front half shell (11) and the rear half shell (12) enclose an air chamber (4), the front half shell (11) is fixedly provided with a plurality of front air pipes (111) in communication with the air chamber (4), and the rear half shell (12) is fixedly provided with a plurality of rear air pipes (121) in communication with the air chamber (4).

2. A raw material adding device for polyurethane foam production according to claim 1, characterized in that: The elastic inner wall group (3) comprises a first cylindrical inner wall (31), a second cylindrical inner wall (32) and a funnel-shaped inner wall (33), all of which are made of elastic material and the middle part of the overall structure of the three is a concave structural form in a normal state.

3. A raw material adding device for polyurethane foam production according to claim 2, characterized in that: An air chamber (4) is formed between the concave parts of the first cylindrical inner wall (31) and the second cylindrical inner wall (32) and the annular outer protrusion (101), and an air chamber (4) is formed between the concave part of the funnel-shaped inner wall (33) and the bottom of the front half shell (11) and the rear half shell (12).

4. A raw material adding device for polyurethane foam production according to claim 1, characterized in that: The fixed ring assembly (2) comprises an upper pressure ring (21), a first intermediate pressure ring (22), a second intermediate pressure ring (23) and a lower friction ring (24), the four being made of hard materials and having outer walls capable of being in close contact with the inner walls of the front half shell (11) and the rear half shell (12).

5. A raw material adding device for polyurethane foam production according to claim 4, characterized in that: The upper pressure ring (21), the first intermediate pressure ring (22) and the second intermediate pressure ring (23) are each provided with one or two clamping grooves (201), a sealed gasket (202) is fixedly arranged in the clamping groove (201), and an annular clamping protrusion (203) is fixedly arranged on the outer walls of the upper pressure ring (21), the first intermediate pressure ring (22) and the second intermediate pressure ring (23).

6. A raw material adding device for polyurethane foam production according to claim 2, characterized in that: A clamping ring (301) is fixedly provided on the inner walls of the ends of the first cylindrical inner wall (31), the second cylindrical inner wall (32) and the funnel-shaped inner wall (33) overlapping the fixing ring assembly (2).

7. A raw material adding device for polyurethane foam production according to claim 1, characterized in that: Both sides of the front half shell (11) and the rear half shell (12) are fixedly provided with connecting ears (13), and the front half shell (11) and the rear half shell (12) are fixedly connected to form a barrel body by means of bolts penetrating the connecting ears (13). The barrel body formed by the front half shell (11) and the rear half shell (12) is covered with a top cover (16), and a feeding port (17) is provided on the top cover (16), and a cover (171) is provided on the feeding port (17).

8. A raw material adding device for polyurethane foam production according to claim 7, characterized in that: The bottom of the barrel body formed by the front half shell (11) and the rear half shell (12) is threadedly connected to a discharge pipe (14), and the bottom of the discharge pipe (14) is fixedly connected to a powder butterfly valve (15).

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