A ductile iron pipe socket with a PP sleeve at the outer end

Abstract

The utility model discloses a PP sleeve for the outer end of the socket of a ductile iron pipe, belonging to the field of protection of the pipe mouth of a ductile iron pipe. The utility model includes a PP protective sleeve and a ductile iron pipe. The PP protective sleeve is made of polypropylene material. The PP protective sleeve is a circular ring composed of flat polypropylene material. The inner diameter of the PP protective sleeve is equal to the outer diameter of the socket end of the ductile iron pipe. The PP protective sleeve is arranged at the outer end of the socket of the ductile iron pipe. The inner ring of the PP protective sleeve is tightly connected to the outer surface of the ductile iron pipe. The PP protective sleeve is used to protect the finishing layer of the outer surface of the ductile iron pipe. The notch arranged in the middle of the PP protective sleeve of the utility model can be easily installed. The PP protective sleeve has the characteristics of high mechanical strength, good toughness, wear resistance and corrosion resistance, which is convenient for workers to install by jacking and is not easy to be crushed. The groove on the outer surface of the PP protective sleeve and the anti-skid layer on the inner ring of the PP protective sleeve can prevent the PP protective sleeve from falling off.

Description

Technical Field

[0001] The utility model relates to the field of protection of ductile iron pipe orifices, in particular to a PP sleeve used at the outer end of a ductile iron pipe spigot. Background Art

[0002] Ductile iron pipe refers to the pipe made by high-speed centrifugal casting of molten iron above No. 18 after adding spheroidizing agent, and then through centrifugal ductile iron casting machine. It is referred to as ductile pipe, ductile iron pipe and ductile cast pipe, etc. It is mainly used for the transportation of tap water and is an ideal material for tap water pipes. The last layer of anti-corrosion on the surface of ductile iron pipe is the final finishing layer. The appearance and anti-corrosion of the pipe are crucial and play a decisive role in the service life of the cast pipe.

[0003] However, the existing ductile iron pipes have the following problems: the ductile iron pipe sockets currently used in the industry are generally protected by rope sleeves such as non-woven fabrics. Due to the soft material, they are easy to adhere to the final finishing layer and will be deformed by pressure, affecting the quality of the final finishing layer. At the same time, the rope sleeves are often broken at the connection and are easy to fall from the ductile iron pipe sockets, which cannot protect the final finishing layer of the ductile iron pipe. In addition, the rope sleeves have strict requirements on product size and are not easy to install. Therefore, it does not meet the existing needs. In this regard, we propose a PP sleeve for the outer end of the ductile iron pipe socket. Utility Model Content

[0004] The purpose of the utility model is to provide a PP sleeve for the outer end of the ductile iron pipe spigot, which is easy to use and helps to protect the surface finishing layer of the ductile iron pipe. The grooves on the outer surface of the PP protective sleeve and the anti-slip layer on the inner ring of the PP protective sleeve can prevent the PP protective sleeve from falling off, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a PP sleeve is used at the outer end of the socket of a ductile iron pipe, comprising a PP protective sleeve and a ductile iron pipe, the PP protective sleeve is made of polypropylene material, the PP protective sleeve is a circular ring composed of flat polypropylene material, the inner diameter of the PP protective sleeve is equal to the outer diameter of the socket end of the ductile iron pipe, the PP protective sleeve is arranged at the outer end of the socket of the ductile iron pipe, the inner ring of the PP protective sleeve is tightly connected to the outer surface of the ductile iron pipe, and the PP protective sleeve is used to protect the finishing layer on the outer surface of the ductile iron pipe; a notch is opened in the middle of the PP protective sleeve, and the notch is used for the PP protective sleeve to be installed at the outer end of the socket of the ductile iron pipe; the inner ring of the PP protective sleeve is provided with an anti-skid layer, the outer surface of the anti-skid layer is tightly connected to the inner ring of the PP protective sleeve, and the anti-skid layer can be arranged into a shape corresponding to the shape of the inner ring of the PP protective sleeve.

[0006] Preferably, grooves are evenly distributed on the outer peripheral surface of the PP protective sleeve, and the direction is consistent with the axis direction of the PP protective sleeve, and the grooves are arranged in a wave shape.

[0007] Preferably, the inner ring shape of the PP protective sleeve is divided into two cases according to the specifications of the ductile iron pipe, namely:

[0008] The ductile iron pipe is DN100-350, and the inner ring of the PP protective sleeve is smooth;

[0009] For ductile iron pipes with specifications of DN400 and above, the inner ring of the PP protective sleeve is set as a concave and convex tooth block.

[0010] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0011] 1. The utility model uses a PP sleeve at the outer end of the ductile iron pipe spigot, and a notch is provided in the middle of the PP sleeve. The notch is provided to facilitate the installation of the PP sleeve. The PP sleeve is a ring composed of a flat polypropylene material. The PP sleeve has the characteristics of high mechanical strength, good toughness, wear resistance and corrosion resistance, which facilitates the workers to perform jacking installation operations. At the same time, due to the high strength and good toughness of the PP sleeve, the PP sleeve is not easily crushed by other ductile iron pipes, and the finishing layer is not easily adhered to the PP sleeve. Only one person is required to operate it. The PP sleeve has good wear resistance and corrosion resistance, and thus has a long service life during use.

[0012] 2. The utility model uses a PP sleeve at the outer end of the ductile iron pipe socket, and a groove is provided on the outer surface of the PP protective sleeve. The groove can increase the friction between the contact surface of the PP protective sleeve and the ductile iron pipe, so that the PP protective sleeve is not easy to fall off during transportation, and the inner ring of the PP protective sleeve is provided with an anti-skid layer, which can increase the friction between the contact surface of the ductile iron pipe and the ductile iron pipe, further making the PP protective sleeve not easy to fall off during transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a side view of the PP protective sleeve of the utility model installed on the socket end of the ductile iron pipe;

[0014] Figure 2 This is a front view of the PP protective sleeve of the utility model installed on the spigot end of the ductile iron pipe;

[0015] Figure 3 This is an enlarged schematic diagram of the PP protective sleeve of the utility model installed at the spigot end of a ductile iron pipe;

[0016] Figure 4 This is a schematic diagram of the structure of the PP protective cover of the utility model;

[0017] Figure 5It is a partially enlarged schematic diagram of the PP protective cover of the utility model.

[0018] In the figure: 1. PP protective cover; 11. groove; 12. tooth block; 13. notch; 14. anti-slip layer; 2. ductile iron pipe. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] In order to solve the existing ductile iron pipe 2 socket protection is generally non-woven rope sleeve, due to the soft material, it is easy to stick to the final coating, and will be deformed, affecting the quality of the final coating, at the same time the rope sleeve connection often breaks, easy to fall from the ductile iron pipe 2 socket, can not play the role of protecting the ductile iron pipe 2 final coating, and the rope sleeve operation has strict requirements on product size, difficult to install technical problems, please refer to Figure 1-Figure 5 , this embodiment provides the following technical solutions:

[0021] A PP sleeve is used at the outer end of a ductile iron pipe spigot, comprising a PP protective sleeve 1 and a ductile iron pipe 2. The PP protective sleeve 1 is made of polypropylene material. The PP protective sleeve 1 is a ring composed of flat polypropylene material. The inner diameter of the PP protective sleeve 1 is equal to the outer diameter of the spigot end of the ductile iron pipe 2. The PP protective sleeve 1 is arranged at the outer end of the spigot of the ductile iron pipe 2. The inner ring of the PP protective sleeve 1 is tightly connected to the outer surface of the ductile iron pipe 2. The PP protective sleeve 1 is used to protect the finishing layer on the outer surface of the ductile iron pipe 2. A notch 13 is opened in the middle of the PP protective sleeve 1. The notch 13 is used for installing the PP protective sleeve 1 at the outer end of the spigot of the ductile iron pipe 2.

[0022] The technical effect of the above content: the PP protective sleeve 1 is made of polypropylene material with certain mechanical strength to form a ring-shaped protective sleeve. The unique toughness of the polypropylene material can make the PP protective sleeve 1 firmly wrapped at the plug of the ductile iron pipe 2. The PP protective sleeve 1 has high mechanical strength, good toughness, wear resistance and corrosion resistance, which is convenient for workers to install by jacking. The installation can be completed by one person. Due to the high strength and good toughness of the PP protective sleeve 1, the PP protective sleeve 1 is not easily crushed by other ductile iron pipes 2 during use, and is not easy to adhere to the finishing. The PP protective sleeve 1 is layered on the PP protective sleeve 1, and the PP protective sleeve 1 has good wear resistance and corrosion resistance, so that the service life of the PP protective sleeve 1 is long. The PP protective sleeve 1 ensures that the contact surfaces of the ductile iron pipe 2 and the ductile iron pipe 2 are protected by the PP protective sleeve 1 when they are stacked together. In this way, the ductile iron pipe 2 can have a better buffering effect when a collision occurs during transportation, which is helpful to protect the finishing layer on the surface of the ductile iron pipe 2. A notch 13 is opened in the middle of the PP protective sleeve 1 to facilitate the installation of the PP protective sleeve 1, thereby improving the adaptability of the size of the PP protective sleeve 1.

[0023] The outer surface of the PP protective sleeve 1 is evenly distributed with grooves 11 in the same direction as the axis of the PP protective sleeve 1. The grooves 11 are arranged in a wave shape. The grooves 11 can increase the friction force when the outer surface of the PP protective sleeve 1 contacts other ductile iron pipes 2.

[0024] The technical effect of the above content: the outer circumferential surface of the PP protective sleeve 1 in contact with other ductile iron pipes 2 is provided with a groove 11, the groove 11 increases the friction force when the outer circumferential surface of the PP protective sleeve 1 contacts with other ductile iron pipes 2, so that the PP protective sleeve 1 is not easy to fall off from the ductile iron pipe 2 during transportation.

[0025] The inner ring shape of the PP protective sleeve 1 is divided into two cases according to the specifications of the ductile iron pipe 2, namely:

[0026] The ductile iron pipe 2 is of DN100-350 specification, and the inner ring of the PP protective sleeve 1 is in a smooth surface state;

[0027] The ductile iron pipe 2 is of specification DN400 and above, and the inner ring of the PP protective sleeve 1 is configured as a tooth block 12 with a concave-convex shape.

[0028] Among them, the size of the PP protective sleeve 1 is designed according to the specifications of the ductile iron pipe 2, and the shape of the inner ring of the PP protective sleeve 1 is also designed differently according to the specifications of the ductile iron pipe 2. The outer diameter sizes of different specifications of the ductile iron pipe 2 are shown in the following table:

[0029]

[0030] Table 1 (Unit: mm)

[0031] Technical effect of the above content: the inner ring of the PP protective sleeve 1 can be set to different shapes according to the specifications of the ductile iron pipe 2. If the ductile iron pipe 2 is DN400 or above, the inner ring of the PP protective sleeve 1 can be set to a concave-convex tooth block 12. The purpose of the concave-convex tooth block 12 is to increase the tensioning force of the PP protective sleeve 1. The structure of the inner ring of the PP protective sleeve 1 adopts a special design, so that the PP protective sleeve 1 can be more closely attached to the ductile iron pipe 2.

[0032] The inner ring of the PP protective cover 1 is provided with an anti-skid layer 14, the outer surface of the anti-skid layer 14 is tightly connected to the inner ring of the PP protective cover 1, and the anti-skid layer 14 can be set to a corresponding shape according to the state of the inner ring of the PP protective cover 1, and the anti-skid layer 14 plays an anti-skid role.

[0033] The technical effect of the above content: the anti-skid layer 14 can be set to a corresponding shape according to the state of the inner ring of the PP protective sleeve 1. If the inner ring of the PP protective sleeve 1 is in a smooth state, the anti-skid layer 14 is also set to a smooth state. If the inner ring of the PP protective sleeve 1 is a concave-convex tooth block 12, the anti-skid layer 14 is also set to a concave-convex shape, so that the anti-skid layer 14 can better fit closely with the inner ring of the PP protective sleeve 1, and the anti-skid layer 14 can further make the PP protective sleeve 1 firmly wrapped at the plug of the ductile iron pipe 2, and the anti-skid layer 14 can increase the friction between the contact surface of the anti-skid layer 14 and the ductile iron pipe 2 to which it is attached, and further prevent the PP protective sleeve 1 from falling off from the ductile iron pipe 2.

[0034] Working principle: The PP protective sleeve 1 is firmly wrapped around the plug of the ductile iron pipe 2. The PP protective sleeve 1 can ensure that the contact surface of the ductile iron pipe 2 when stacked together is protected by the PP protective sleeve 1, which can produce a better buffering effect when the ductile iron pipe 2 collides during transportation, and is helpful to protect the finishing layer on the surface of the ductile iron pipe 2. The notch 13 opened in the middle of the PP protective sleeve 1 can facilitate the installation of the PP protective sleeve 1, thereby improving the adaptability of the size of the PP protective sleeve 1. The groove 11 arranged on the outer peripheral surface of the PP protective sleeve 1 can increase the friction force when the outer peripheral surface of the PP protective sleeve 1 contacts with other ductile iron pipes 2, and prevent the PP protective sleeve 1 from falling off from the ductile iron pipe 2 during transportation. The anti-skid layer 14 arranged on the inner ring of the PP protective sleeve 1 can increase the friction force between the anti-skid layer 14 and the contact surface of the ductile iron pipe 2 to which it is attached, thereby further preventing the PP protective sleeve 1 from falling off from the ductile iron pipe 2.

[0035] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A ductile iron pipe socket outer end uses a PP sleeve, comprising a PP protective sleeve (1) and a ductile iron pipe (2), characterized in that: The PP protective sleeve (1) is made of polypropylene material. The PP protective sleeve (1) is a circular ring composed of flat polypropylene material. The inner diameter of the PP protective sleeve (1) is equal to the outer diameter of the plug end of the ductile iron pipe (2). The PP protective sleeve (1) is arranged at the outer end of the plug end of the ductile iron pipe (2). The inner ring of the PP protective sleeve (1) is tightly connected to the outer surface of the ductile iron pipe (2). The PP protective sleeve (1) is used to protect the finishing layer on the outer surface of the ductile iron pipe (2). A notch (13) is provided in the middle of the PP protective sleeve (1). The notch (13) is used for the PP protective sleeve (1) to be installed at the outer end of the plug end of the ductile iron pipe (2). The inner ring of the PP protective sleeve (1) is provided with an anti-slip layer (14). The outer surface of the anti-slip layer (14) is tightly connected to the inner ring of the PP protective sleeve (1), and the anti-slip layer (14) can be set to a shape corresponding to the shape of the inner ring of the PP protective sleeve (1).

2. The ductile iron pipe socket outer end according to claim 1 uses a PP sleeve, characterized in that: The outer peripheral surface of the PP protective sleeve (1) is evenly distributed with grooves (11) whose direction is consistent with the axial direction of the PP protective sleeve (1), and the grooves (11) are arranged in a wave shape.

3. The outer end of the ductile iron pipe socket according to claim 1 uses a PP sleeve, characterized in that: The inner ring shape of the PP protective sleeve (1) is divided into two cases according to the specifications of the ductile iron pipe (2), namely: The ductile iron pipe (2) is of DN100-350 specification, and the inner ring of the PP protective sleeve (1) is in a smooth surface state; The ductile iron pipe (2) has a specification of DN400 or above, and the inner ring of the PP protective sleeve (1) is configured as a tooth block (12) with a concave-convex shape.

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