A PPR hot-melt connection pipe with high shear resistance

Abstract

The utility model relates to the technical field of PPR hot-melt connecting pipes, and the application discloses a PPR hot-melt connecting pipe with high shear resistance, including a PPR pipe body and a connecting pipe sleeve, a limiting ring plate is fixed to the outer surface of one end of the PPR pipe body close to the connecting pipe sleeve, a supporting pipe sleeve is slidingly sleeved on the PPR pipe body on the side of the limiting ring plate, a connecting through groove matching the PPR pipe body is opened inside the supporting pipe sleeve, and a limiting inner plate is fixed to the inner surface of the connecting pipe sleeve on the side of the PPR pipe body. The utility model strengthens the support at the interface, so that the PPR connection is more firm and stable after hot melting, and the interface has sufficient supporting force, thereby solving the problem that the interface of the existing PPR hot-melt connecting pipe is easily deformed and cracked when subjected to shear force, and greatly improves the shear resistance of the interface of the PPR pipe after hot-melt connection, thereby ensuring the firmness of the PPR pipe after connection.

Description

Technical Field

[0001] The utility model application relates to the technical field of PPR hot-melt connecting pipes, in particular to a PPR hot-melt connecting pipe with high shear resistance. Background Art

[0002] PPR pipe, also known as tripropylene polypropylene pipe, random copolymer polypropylene pipe or PPR pipe, is a pipe made of random copolymer polypropylene as raw material. It has the advantages of energy saving and material saving, environmental protection, light weight and high strength, corrosion resistance, smooth inner wall without scaling, easy construction and maintenance, and long service life. It is widely used in building water supply and drainage, urban and rural water supply and drainage, city gas, electricity and optical cable sheathing, industrial fluid transportation, agricultural irrigation and other construction, municipal, industrial and agricultural fields.

[0003] PPR pipes are generally spliced ​​and fixed by hot melt connection. After hot melt connection, the interface is limited in connection area and has poor shear resistance. As a result, the interface of the PPR pipe is easily cracked when subjected to shear force, resulting in limited interface firmness. Summary of the invention

[0004] In order to solve the problem that the interface of the existing PPR hot-melt connecting pipe is easily deformed and cracked when subjected to shear force, the utility model provides a PPR hot-melt connecting pipe with high shear resistance to solve the above problem.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A highly shear-resistant PPR hot-melt connecting pipe comprises a PPR pipe body and a connecting pipe sleeve, wherein a limiting ring plate is fixed to the outer surface of one end of the PPR pipe body close to the connecting pipe sleeve, a supporting pipe sleeve is provided on the sliding sleeve of the PPR pipe body on the side of the limiting ring plate, a connecting through groove cooperating with the PPR pipe body is provided inside the supporting pipe sleeve, and a limiting inner plate is fixed to the inner surface of the connecting pipe sleeve on the side of the PPR pipe body.

[0007] Furthermore, the PPR pipe body includes an inner layer, a rigid reinforcement interlayer and an outer layer of the pipe body, the outer layer of the pipe body is sleeved on the outside of the inner layer of the pipe body, a rigid reinforcement interlayer is embedded between the outer surface of the rigid reinforcement interlayer and the inner surface of the outer layer of the pipe body, and the inner and outer surfaces of the rigid reinforcement interlayer are fixedly connected to the inner layer of the pipe body and the outer layer of the pipe body respectively.

[0008] Furthermore, the PPR pipe body also includes an anti-corrosion inner coating and an anti-corrosion and anti-oxidation coating. The inner surface of the inner layer of the pipe body is coated with the anti-corrosion inner coating, and the outer surface of the outer layer of the pipe body is coated with the anti-corrosion and anti-oxidation coating.

[0009] Furthermore, the distance between the limiting ring plate and the side end of the PPR pipe body is equal to the distance between the side ends of the connecting pipe sleeves on the side of the limiting inner plate plus the sum of the thicknesses of the supporting pipe sleeve and the sealing rubber pad.

[0010] Furthermore, the inner circle diameter of the limiting inner plate is larger than the inner circle diameter of the PPR pipe body, and the inner circle diameter of the limiting inner plate is smaller than the outer circle diameter of the PPR pipe body.

[0011] Furthermore, a sealing gasket is fixed inside the supporting pipe sleeve on the side of the connecting groove, and the inner ring diameter of the sealing gasket is equal to the diameter of the connecting groove. The diameter of the connecting groove is smaller than the outer ring diameter of the limiting ring plate and the connecting pipe sleeve. The diameter of the connecting groove is larger than the outer ring diameter of the PPR pipe body.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] In the utility model, by strengthening the support at the interface, the PPR connection after hot melting is made more firm and stable, and the interface has sufficient supporting force, which solves the problem that the interface of the existing PPR hot-melt connection pipe is easy to deform and crack when subjected to shear force, and greatly improves the shear resistance of the interface of the PPR pipe after hot-melt connection, thereby ensuring the firmness of the PPR pipe after connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0015] Figure 1 It is a front view schematic diagram of a PPR hot melt connecting pipe structure according to an embodiment of the present application;

[0016] Figure 2 yes Figure 1 A schematic front cross-sectional view of a PPR hot-melt connecting pipe in the illustrated embodiment;

[0017] Figure 3 yes Figure 1 A schematic side cross-sectional view of a PPR pipe body in the illustrated embodiment.

[0018] The meanings of the reference numerals in the figure are: 1. PPR pipe body; 111. Inner layer of pipe body; 112. Anti-corrosion inner coating; 113. Rigid reinforcing interlayer; 114. Outer layer of pipe body; 115. Anti-corrosion and antioxidant coating; 2. Connecting sleeve; 3. Limiting ring plate; 4. Limiting inner plate; 5. Supporting sleeve; 6. Connecting groove; 7. Sealing pad. DETAILED DESCRIPTION

[0019] In order to make the purpose, features, and advantages of the present application more obvious and easy to understand, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the embodiments described below are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0020] Reference Figure 1 , Figure 2 and Figure 3 , a high shear resistance PPR hot-melt connecting pipe, comprising a PPR pipe body 1 and a connecting pipe sleeve 2, a limiting ring plate 3 is fixed on the outer surface of one end of the PPR pipe body 1 close to the connecting pipe sleeve 2, the distance between the limiting ring plate 3 and the side end of the PPR pipe body 1 is equal to the distance between the side ends of the connecting pipe sleeve 2 on the side of the limiting inner plate 4 plus the sum of the thicknesses of the supporting pipe sleeve 5 and the sealing rubber pad 7, a supporting pipe sleeve 5 is slidingly sleeved on the PPR pipe body 1 on the side of the limiting ring plate 3, a connecting through groove 6 matching the PPR pipe body 1 is opened inside the supporting pipe sleeve 5, the inner ring diameter of the limiting inner plate 4 is larger than the inner ring diameter of the PPR pipe body 1, the inner ring diameter of the limiting inner plate 4 is smaller than the outer ring diameter of the PPR pipe body 1, a limiting inner plate 4 is fixed on the inner surface of the connecting pipe sleeve 2 on the side of the PPR pipe body 1, the inner ring diameter of the limiting inner plate 4 is larger than the inner ring diameter of the PPR pipe body 1, and the inner ring diameter of the limiting inner plate 4 is smaller than the outer ring diameter of the PPR pipe body 1.

[0021] Specifically, when the PPR pipe body 1 and the connecting pipe sleeve 2 need to be hot-melt connected, the inner wall of the connecting pipe sleeve 2 and the outer surface of the PPR pipe body 1 are first heated and melted. After melting to the required degree, the supporting pipe sleeve 5 is quickly put on the outside of the PPR pipe body 1, and the melted part of the outer surface of the PPR pipe body 1 is aligned and inserted into the inside of the connecting pipe sleeve 2. During insertion, the supporting pipe sleeve 5 and the sealing pad 7 are driven to abut against the side of the connecting pipe sleeve 2. After insertion, the PPR pipe body 1 and the connecting pipe sleeve 2 are held so that the two remain relatively still, and then the hot-melt connection is completed after standing for a period of time. At this time, the supporting pipe sleeve 5 supports and protects the connection between the PPR pipe body 1 and the connecting pipe sleeve 2.

[0022] As an optimization solution, Figure 2 and Figure 3As shown, the PPR pipe body 1 includes a pipe inner layer 111, a rigid reinforcement interlayer 113 and a pipe outer layer 114. The pipe outer layer 114 is sleeved on the outside of the pipe inner layer 111. The rigid reinforcement interlayer 113 is embedded between the outer surface of the rigid reinforcement interlayer 113 and the inner surface of the pipe outer layer 114. The inner and outer surfaces of the rigid reinforcement interlayer 113 are fixedly connected to the pipe inner layer 111 and the pipe outer layer 114 respectively. The PPR pipe body 1 also includes an anti-corrosion inner coating 112 and an anti-corrosion and anti-oxidation coating 115. The inner surface of the pipe inner layer 111 is coated with the anti-corrosion inner coating 112, and the outer surface of the pipe outer layer 114 is coated with the anti-corrosion and anti-oxidation coating 115.

[0023] Specifically, when the PPR pipe body 1 is subjected to shear force, the anti-corrosion inner coating 112 between the inner layer 111 of the pipe body and the outer layer 114 of the pipe body supports the PPR pipe body 1, thereby improving the shear resistance of the PPR pipe body 1. During normal use, the anti-corrosion inner coating 112 and the anti-corrosion and anti-oxidation coating 115 can provide anti-corrosion protection for the PPR pipe body 1, thereby increasing the practical life of the PPR pipe body 1.

[0024] It will be apparent to those skilled in the art that the present application is not limited to the details of the exemplary embodiments described above, and that the present application can be implemented in other specific forms without departing from the spirit or essential features of the present application. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the present application is defined by the appended claims rather than the above description, and it is intended that all changes within the meaning and scope of the equivalent elements of the claims be included in the present application. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0025] As described above, the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A PPR hot-melt connection pipe with high shear resistance, comprising a PPR pipe body (1) and a connection pipe sleeve (2), characterized in that: A limiting ring plate (3) is fixed on the outer surface of one end of the PPR pipe body (1) close to the connecting pipe sleeve (2); a supporting pipe sleeve (5) is slidably sleeved on the PPR pipe body (1) on the side of the limiting ring plate (3); a connecting through groove (6) cooperating with the PPR pipe body (1) is provided inside the supporting pipe sleeve (5); and a limiting inner plate (4) is fixed on the inner surface of the connecting pipe sleeve (2) on the side of the PPR pipe body (1).

2. The high shear resistance PPR hot melt connecting pipe according to claim 1 is characterized in that: The PPR pipe body (1) comprises a pipe inner layer (111), a rigid reinforcing interlayer (113) and a pipe outer layer (114); the pipe inner layer (111) is sleeved with the pipe outer layer (114) outside; the rigid reinforcing interlayer (113) is embedded between the outer surface of the rigid reinforcing interlayer (113) and the inner surface of the pipe outer layer (114); and the inner and outer surfaces of the rigid reinforcing interlayer (113) are fixedly connected to the pipe inner layer (111) and the pipe outer layer (114) respectively.

3. The high shear resistance PPR hot melt connecting pipe according to claim 2 is characterized in that: The PPR pipe body (1) further comprises an anti-corrosion inner coating (112) and an anti-corrosion and anti-oxidation coating (115); the inner surface of the inner layer (111) of the pipe body is coated with the anti-corrosion inner coating (112), and the outer surface of the outer layer (114) of the pipe body is coated with the anti-corrosion and anti-oxidation coating (115).

4. The high shear resistance PPR hot melt connecting pipe according to claim 1 is characterized in that: The distance between the limiting ring plate (3) and the side end of the PPR pipe body (1) is equal to the distance between the side ends of the connecting pipe sleeve (2) on the side of the limiting inner plate (4) plus the sum of the thicknesses of the supporting pipe sleeve (5) and the sealing rubber pad (7).

5. The high shear resistance PPR hot melt connecting pipe according to claim 1 is characterized in that: The inner ring diameter of the limiting inner plate (4) is larger than the inner ring diameter of the PPR pipe body (1), and the inner ring diameter of the limiting inner plate (4) is smaller than the outer ring diameter of the PPR pipe body (1).

6. The high shear resistance PPR hot melt connecting pipe according to claim 1 is characterized in that: A sealing rubber pad (7) is fixed inside the supporting pipe sleeve (5) on the side of the connecting groove (6), and the inner diameter of the sealing rubber pad (7) is equal to the diameter of the connecting groove (6). The diameter of the connecting groove (6) is smaller than the outer diameters of the limiting ring plate (3) and the connecting pipe sleeve (2), and the diameter of the connecting groove (6) is larger than the outer diameter of the PPR pipe body (1).

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