Pouring polyurethane foaming sealing end socket special for pipe fitting production

Abstract

The utility model discloses a special pouring polyurethane foaming sealing end socket for pipe fitting production, and relates to the technical field of polyurethane thermal insulation pipe production, in particular to a special pouring polyurethane foaming sealing end socket for thermal insulation pipe fitting production. The sealing head comprises a sealing head sealing section and a plane sealing section, the end socket sealing section is of an annular structure which is made of high-density polyethylene and has a certain thickness. The plane sealing section is of an annular plate-shaped structure made of metal with certain hardness. The end socket sealing section and the plane sealing section are connected through a screw. The end socket sealing section is arranged between the pipe fitting steel pipe and the outer protective pipe, and the plane sealing section blocks the outer portion of the steel pipe and the end of the outer protective pipe. According to the technical scheme, the problems that in the prior art, an embedded axial sealing mode is not beneficial to separation from a polyurethane heat preservation pipe fitting; meanwhile, a steel sealing system adheres to polyurethane, a release agent needs to be smeared, the key quality is affected by foaming pollution of the end of the pipe fitting when the release agent is smeared, and the release agent is high in cost and inflammable.

Description

Technical Field

[0001] This utility model relates to a special polyurethane foam sealing head for pipe fitting production, and particularly to a special polyurethane foam sealing head for pipe fitting production. Background Technology

[0002] Currently, polyurethane foam insulated pipe fittings and sealing heads are generally made of steel to ensure sufficient strength and control costs. Furthermore, due to limitations in previous pipe fitting cutting technology, only embedded axial sealing was possible, making it difficult to separate the sealing system from the insulated pipe fitting after production. Additionally, because steel and polyurethane have a certain degree of adhesion, the sealing system easily adheres to the polyurethane foam after foaming. Forcibly removing the sealing system can damage the foamed structure at the pipe end, resulting in defective products. The solution is to apply a release agent to the contact surface between the existing sealing system and the polyurethane. This technology has two main problems: firstly, the release agent is a highly flammable chemical, posing a significant safety hazard, and its high cost increases manufacturing costs; secondly, the existing steel sealing system easily attracts various contaminants, dust, and oil after long-term application of the release agent, causing contamination of the foamed pipe end and affecting the quality of the outer pipe.

[0003] In view of the problems existing in the above-mentioned existing technologies, it is necessary to research and design a new type of injection polyurethane foam sealing head for pipe fitting production, so as to overcome the problems existing in the existing technologies. Summary of the Invention

[0004] The existing embedded axial sealing method is not conducive to separation from polyurethane insulated pipe fittings; at the same time, the steel sealing system adheres to the polyurethane, requiring the application of a release agent. Applying a release agent can lead to foam contamination at the pipe end, affecting critical quality. Furthermore, the release agent is expensive and flammable. Therefore, this invention provides a special polyurethane foam sealing head for pipe fitting production. This utility model mainly uses a sealing head composed of a high-density polyethylene-supported sealing section and a steel flat sealing end to form a complete sealing head, sealing the end of the insulated pipe. The non-adhesive property of polyethylene and polyurethane foam solves the problem of adhesion between the steel head and polyurethane, thus eliminating the need for a release agent and avoiding various adverse consequences associated with its application.

[0005] The technical means adopted in this utility model are as follows:

[0006] A special polyurethane foam sealing head for pipe fitting production has a split structure, including: a sealing head section and a flat sealing section;

[0007] Furthermore, the sealing section of the end cap is a ring-shaped structure with a certain thickness made of high-density polyethylene;

[0008] Furthermore, the planar sealing section is an annular plate structure made of metal with a certain hardness;

[0009] Furthermore, the head sealing section and the plane sealing section are connected by screws;

[0010] Furthermore, the end cap sealing section is placed between the steel pipe and the outer protective pipe, while the flat sealing section seals the outside of the steel pipe and the end of the outer protective pipe.

[0011] Furthermore, the inner diameter of the sealing section of the end cap is slightly larger than the outer diameter of the steel pipe, and it is in close contact with the steel pipe as much as possible to prevent foam from overflowing between the two.

[0012] Furthermore, the outer diameter of the sealing section of the end cap is greater than or equal to the inner diameter of the outer protective tube, and it is machined into an arc-shaped surface to facilitate the insertion of the front end of the sealing section of the end cap between the steel pipe and the outer protective tube.

[0013] Furthermore, the inner diameter of the planar sealing section is slightly larger than the outer diameter of the steel pipe, and it is in close contact with the steel pipe as much as possible to prevent foam from overflowing between the two.

[0014] Furthermore, the outer diameter of the planar sealing section is larger than the outer diameter of the outer protective tube, and the end of the outer protective tube is sealed to prevent foam overflow.

[0015] Furthermore, two disassembly plates are symmetrically installed on both sides of the planar sealing section for the operator to install / remove the sealing head.

[0016] Furthermore, the planar sealing section is equipped with lifting lugs for lifting the sealing head using lifting equipment.

[0017] Furthermore, the lifting lugs are installed at the top of the flat sealing section and are equidistant from the two disassembly plates, so that the operator can support the sealing head with both hands during hoisting.

[0018] Compared with the prior art, the present invention has the following advantages:

[0019] 1. The polyurethane foam sealing head for pipe fitting production provided by this utility model can better adapt to on-site production needs and achieve a longer service life by changing the sealing structure and adding a disassembly plate structure.

[0020] 2. The special polyurethane foam sealing head for pipe fitting production provided by this utility model, by changing the sealing structure and adding a disassembly plate structure, makes it easy for operators to load and unload.

[0021] 3. The special polyurethane foam sealing head for pipe fitting production provided by this utility model utilizes the self-cleaning and self-lubricating characteristics of high-density polyethylene material, which has a large molecular weight and small molecular gaps, thereby forming a natural molecular isolation with polyurethane, making it less prone to sticking.

[0022] 4. The polyurethane foam sealing head for pipe fitting production provided by this utility model has a density of high-density polyethylene that is much lower than that of steel. Therefore, even with the same volume and the addition of end face sealing plates, its actual weight is still much less than that of an all-steel sealing system. This makes the system more adaptable to the production needs of large-diameter polyurethane foam insulated pipe fittings.

[0023] In summary, the technical solution of this utility model solves the problems of existing embedded axial sealing forms being unfavorable for separation from polyurethane insulated pipe fittings; at the same time, the steel sealing system adheres to the polyurethane, requiring the application of a release agent, which can lead to foaming and contamination at the pipe end, affecting key quality; and the release agent is also expensive and flammable. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the assembly structure of this utility model;

[0026] Figure 2 This is a schematic diagram of the structure of this utility model;

[0027] Figure 3 This is a side view of the present invention;

[0028] Figure 4 This is a schematic diagram of the assembly of an existing sealing head.

[0029] In the diagram: 1. Head sealing section; 2. Planar sealing section; 3. Disassembly plate; 4. Lifting lug; 5. Steel pipe. Detailed Implementation

[0030] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this utility model or its application or use. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0032] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to the present invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0033] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0034] In the description of this utility model, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0035] For ease of description, spatial relative terms such as "above," "over," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation besides the orientation of the device as described in the figures. For example, if the device in the figures is inverted, a device described as "above" or "above" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0036] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0037] like Figure 1-3 As shown, this utility model provides a special polyurethane foam sealing head for pipe fitting production with a split structure, including: a sealing section 1 and a planar sealing section 2; the sealing section 1 is an annular structure with a certain thickness made of high-density polyethylene; the planar sealing section 2 is an annular plate structure made of metal with a certain hardness.

[0038] The head sealing section 1 and the plane sealing section 2 are connected by screws; the head sealing section 1 is placed between the steel pipe 5 and the outer protective pipe 6, and the plane sealing section 2 is sealed on the outside of the steel pipe 5 and the end of the outer protective pipe 6.

[0039] like Figure 1-3 As shown, the inner diameter of the sealing section 1 of the end cap is slightly larger than the outer diameter of the steel pipe 5, and it is in close contact with the steel pipe 5 as much as possible to prevent the foam 7 from overflowing between the two; the outer diameter of the sealing section 1 of the end cap is greater than or equal to the inner diameter of the outer protective pipe 6, and it is processed into an arc-shaped surface to facilitate the insertion of the front end of the sealing section 1 between the steel pipe 5 and the outer protective pipe 6.

[0040] like Figure 1-3 As shown, the inner diameter of the planar sealing section 2 is slightly larger than the outer diameter of the steel pipe 5, and it is in close contact with the steel pipe 5 as much as possible to prevent the foam 7 from overflowing between the two; the outer diameter of the planar sealing section 2 is larger than the outer diameter of the outer protective pipe 6, and the end of the outer protective pipe 6 is sealed to prevent the foam 7 from overflowing.

[0041] Two disassembly plates 3 are symmetrically installed on both sides of the flat sealing section 2 for the operator to install / remove the sealing head.

[0042] like Figure 2 , 3 As shown, the flat sealing section 2 is equipped with lifting lugs 4, which are used to lift the sealing head by lifting equipment.

[0043] like Figure 2 , 3 As shown, the lifting lug 4 is installed at the top of the flat sealing section 2 and is equidistant from the two disassembly plates 3, so that the operator can support the sealing head with both hands during hoisting.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A special polyurethane foam sealing head for pipe fitting production, characterized in that: The special polyurethane foam sealing head for pipe fitting production is a split structure, including: a sealing section (1) and a flat sealing section (2); The sealing section (1) of the head is a ring structure with a certain thickness made of high-density polyethylene; The planar sealing section (2) is an annular plate structure made of metal with a certain hardness; The head sealing section (1) and the plane sealing section (2) are connected by screws; The sealing section (1) is placed between the steel pipe (5) and the outer protective pipe (6), and the flat sealing section (2) is sealed outside the steel pipe (5) and at the end of the outer protective pipe (6).

2. The special injection polyurethane foam sealing head for pipe fitting production according to claim 1, characterized in that: The inner diameter of the sealing section (1) of the end cap is slightly larger than the outer diameter of the steel pipe (5), and it is in close contact with the steel pipe (5) as much as possible to prevent the foam (7) from overflowing between the two. The outer diameter of the sealing section (1) is less than the inner diameter of the outer protective tube (6), and it is machined into an arc-shaped surface to facilitate the insertion of the front end of the sealing section (1) between the steel pipe (5) and the outer protective tube (6).

3. The special polyurethane foam sealing head for pipe fitting production according to claim 1, characterized in that: The inner diameter of the planar sealing section (2) is slightly larger than the outer diameter of the steel pipe (5), and it is in close contact with the steel pipe (5) as much as possible to prevent the foam (7) from overflowing between the two. The outer diameter of the planar sealing section (2) is larger than the outer diameter of the outer protective tube (6), and the end of the outer protective tube (6) is sealed to prevent the foam (7) from overflowing.

4. The special polyurethane foam sealing head for pipe fitting production according to claim 1, characterized in that: The planar sealing section (2) is symmetrically equipped with two disassembly plates (3) on both sides for the operator to install / remove the sealing head.

5. The special injection polyurethane foam sealing head for pipe fitting production according to claim 1, characterized in that: The planar sealing section (2) is equipped with lifting lugs (4) for lifting the sealing head by lifting equipment.

6. The special injection polyurethane foam sealing head for pipe fitting production according to claim 5, characterized in that: The lifting lug (4) is installed at the top of the flat sealing section (2) and is equidistant from the two disassembly plates (3) so that the operator can support the sealing head with both hands during hoisting.

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