A pressure-resistant and low-temperature-resistant MPP power pipe

Abstract

The utility model provides a pressure-resistant and low-temperature-resistant MPP electric power pipe, including an inner pipe, an auxiliary frame, thermal insulation cotton, a buffer frame and an outer pipe, wherein the inner pipe is slidably installed with an auxiliary frame, and the outer side surface of the inner pipe is covered with several sections of the thermal insulation cotton, wherein buffer frames are arranged between adjacent thermal insulation cottons, and the buffer frames are fixed to the outer side surface of the inner pipe; the outer side surface of the thermal insulation cotton is covered with an outer pipe, wherein the inner wall of the outer pipe is fixed to the outer side surface of the buffer frame; the inner pipe and the outer pipe are both tubular structures made of modified polypropylene material. The arrangement of the auxiliary frame, thermal insulation cotton and buffer frame of the utility model can avoid the wear of the cable when installing the cable during use, and ensure that the cable can still maintain normal operation in a low-temperature environment, and at the same time, it can absorb and disperse the external pressure, thereby effectively protecting the inner pipe and the cable inside it from damage.

Description

Technical Field

[0001] The utility model belongs to the technical field of power transmission, and in particular relates to a pressure-resistant and low-temperature-resistant MPP power pipe. Background Art

[0002] MPP power pipe, as a new type of pipeline material, has been widely used in the fields of power, communication, etc. in recent years. It uses modified polypropylene (MPP) as the main raw material, has excellent physical properties and chemical stability, can resist chemical corrosion and soil pressure, and is suitable for pipeline laying under various complex environmental conditions.

[0003] However, despite the many advantages of MPP power tubes, there are also some problems in practical applications. First, when assembling the cable into the MPP power tube, the cable will rub against the inside of the tube, which will not only damage the cable, but also affect the normal use of the cable; secondly, the existing MPP power tubes are often just a single tube structure, lacking insulation design, which may make the cable unable to operate normally in low temperature environments, affecting the stability and safety of power transmission; in addition, for external pressures such as soil pressure, vehicle loads, etc., the existing MPP power tubes often lack effective absorption and dispersion mechanisms, and the cables are easily damaged.

[0004] Therefore, it is very necessary to invent a pressure-resistant and low-temperature-resistant MPP power pipe. Utility Model Content

[0005] The purpose of the utility model is to provide a pressure-resistant and low-temperature-resistant MPP power pipe to solve the problems mentioned in the background technology.

[0006] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0007] The utility model is a pressure-resistant and low-temperature-resistant MPP electric power pipe, comprising an inner pipe, an auxiliary frame, thermal insulation cotton, a buffer frame and an outer pipe, wherein the auxiliary frame is slidably installed inside the inner pipe, and the outer side surface of the inner pipe is covered with a plurality of sections of the thermal insulation cotton, wherein buffer frames are arranged between adjacent thermal insulation cottons, and the buffer frames are fixed to the outer side surface of the inner pipe; the outer side surface of the thermal insulation cotton is covered with an outer pipe, wherein the inner wall of the outer pipe is fixed to the outer side surface of the buffer frame; the inner pipe and the outer pipe are both tubular structures made of modified polypropylene material.

[0008] Furthermore, the auxiliary frame includes a positioning ring, a ball and a traction rope. There are several positioning rings, and the outer side of the positioning ring is rotatably installed with several balls through a ball joint. The outer side of the ball is arranged in close contact with the inner wall of the inner tube; several traction ropes are fixed between adjacent positioning rings, and the traction ropes are all made of steel wire woven into a rope body structure. Such a setting makes it easy to put the cable into the inner tube and avoid scratching the cable.

[0009] Furthermore, the buffer frame includes a first limiting ring, a second limiting ring and a spiral spring, the first limiting ring and the second limiting ring are both arranged between adjacent thermal insulation cottons; the outer side surface of the first limiting ring is fixed to the inner wall of the outer tube, and the inner wall of the first limiting ring is provided with a first groove; the second limiting ring is fixed to the outer side surface of the inner tube, wherein the outer side surface of the second limiting ring is provided with a second groove; the inner side of the spiral spring is fixed to the inside of the second groove by buckling, and the outer side of the spiral spring is fixed to the inside of the first groove by buckling. Such an arrangement can disperse and offset the pressure generated outside, thereby avoiding damage to the inner tube and the cable inside the inner tube.

[0010] Furthermore, a plurality of protrusions are fixed on the outer side surface of the outer tube, and a wire mesh is fixed on the inner wall of the outer tube. Such an arrangement can prevent the MPP power tube from shifting or rolling on a sliding ground, and enhance the strength of the outer tube.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] 1. The auxiliary frame of the utility model is set up. When it is used, the cable can slide smoothly when it is placed in the inner tube through the cooperation of the positioning ring and the ball. The rotation of the ball reduces the friction between the cable and the inner wall of the inner tube, thereby greatly reducing the risk of damage to the cable during installation, which not only improves work efficiency but also significantly enhances the safety of the cable.

[0013] 2. The setting of the thermal insulation cotton of the utility model effectively blocks the influence of the external low temperature on the cable in the inner tube, ensuring that the cable can still maintain normal operation in a low temperature environment, so as to facilitate use in cold areas or in winter.

[0014] 3. The buffer rack of the utility model is set up, when it is in use, through the supporting effect of the spiral spring, the inner tube can be stably maintained in the middle position of the outer tube, when the power tube is subjected to external pressure, the spiral spring can absorb and disperse the pressure, thereby effectively protecting the inner tube and the cables inside it from damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 It is a structural schematic diagram of the utility model.

[0017] Figure 2 It is a schematic diagram of the full cross-section structure of the utility model.

[0018] Figure 3 It is a structural schematic diagram of the auxiliary frame of the utility model.

[0019] Figure 4 It is a partial enlarged structural schematic diagram of position A of the utility model.

[0020] In the figure:

[0021] 1-inner tube, 2-auxiliary frame, 21-positioning ring, 22-ball, 23-traction rope, 3-insulation cotton, 4-buffer frame, 41-first limiting ring, 42-second limiting ring, 43-volute spring, 5-outer tube. DETAILED DESCRIPTION

[0022] 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 of 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.

[0023] In the description of the present invention, it should be understood that the terms "upper", "middle", "outer", "inner", "all around" and the like indicating directions or positional relationships are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limitations on the present invention.

[0024] See also Figure 1 and Figure 2As shown, the utility model is a pressure-resistant and low-temperature resistant MPP power pipe, comprising an inner pipe 1, an auxiliary frame 2, thermal insulation cotton 3, a buffer frame 4 and an outer pipe 5, the inner pipe 1 is slidably installed with the auxiliary frame 2, and the outer side surface of the inner pipe 1 is sleeved with a plurality of sections of thermal insulation cotton 3, wherein buffer frames 4 are arranged between adjacent thermal insulation cottons 3, and the buffer frames 4 are fixed to the outer side surface of the inner pipe 1; the outer side surface of the thermal insulation cotton 3 is sleeved with the outer pipe 5, wherein the inner wall of the outer pipe 5 is fixed to the outer side surface of the buffer frame 4; the inner pipe 1 and the outer pipe 5 are both tubular structures made of modified polypropylene material.

[0025] like Figure 3 As shown, the auxiliary frame 2 includes a positioning ring 21, a ball 22 and a traction rope 23. There are several positioning rings 21, and the outer side surfaces of the positioning rings 21 are rotatably mounted with several balls 22 through ball joints. The outer side surfaces of the balls 22 are fitted against the inner wall of the inner tube 1. Several traction ropes 23 are fixed between adjacent positioning rings 21, wherein the traction ropes 23 are all woven with steel wires to form a rope body structure. When in use, the auxiliary frame 2 can be taken out from the inner tube 1, and then the positioning ring 21 is put on the cable, and then the auxiliary frame 2 and the cable are slid together into the inner tube 1. In the process of sliding the auxiliary frame 2 and the cable into the inner tube 1, the ball 22 can rotate accordingly, so as to avoid friction between the cable and the inner wall of the inner tube 1, and to avoid damage to the cable when it is placed into the inner tube 1.

[0026] like Figure 4 As shown, the buffer frame 4 includes a first limiting ring 41, a second limiting ring 42 and a volute spring 43, the first limiting ring 41 and the second limiting ring 42 are both arranged between adjacent thermal insulation cottons 3; the outer side surface of the first limiting ring 41 is fixed to the inner wall of the outer tube 5, and the inner wall of the first limiting ring 41 is provided with a first groove; the second limiting ring 42 is fixed to the outer side surface of the inner tube 1, wherein the outer side surface of the second limiting ring 42 is provided with a second groove; the inner side of the volute spring 43 is fixed to the inside of the second groove by snapping, and the outer side of the volute spring 43 is fixed to the inside of the first groove by snapping. When in use, the volute spring 43 can support the first limiting ring 41, so that the inner tube 1 is in the middle of the outer tube 5. When subjected to external pressure, the pressure will be transmitted to the volute spring 43 through the outer tube 5, and the volute spring 43 can offset the pressure, thereby avoiding damage to the inner tube 1 and the cable inside the inner tube 1.

[0027] Specifically, a plurality of protrusions are fixed on the outer side surface of the outer tube 5, and a wire mesh is fixed on the inner wall of the outer tube 5. When in use, the protrusions on the outer side surface of the outer tube 5 can provide sufficient friction to prevent the MPP power tube from shifting or rolling on a sliding ground, and the wire mesh on the inner wall of the outer tube 5 can strengthen the strength of the outer tube 5.

[0028] See also Figure 1-4As shown, the utility model is a pressure-resistant and low-temperature-resistant MPP power tube, and its working principle is: during installation, the cable can be fixed to the inside of the inner tube 1 through the auxiliary frame 2, and during use, the thermal insulation cotton 3 can block the influence of the external low temperature on the cable in the inner tube 1, and when external pressure acts on the outer tube 5, the spiral spring 43 and the thermal insulation cotton 3 can disperse and offset the pressure, thereby avoiding external pressure from causing damage to the inner tube 1 and the cable inside the inner tube 1.

[0029] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0030] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A pressure-resistant and low-temperature-resistant MPP power pipe, comprising an inner pipe (1), an auxiliary frame (2), thermal insulation cotton (3), a buffer frame (4) and an outer pipe (5), characterized in that: An auxiliary frame (2) is slidably mounted inside the inner tube (1), and a plurality of sections of the thermal insulation cotton (3) are sleeved on the outer side surface of the inner tube (1), wherein a buffer frame (4) is arranged between adjacent thermal insulation cottons (3), and the buffer frames (4) are fixed on the outer side surface of the inner tube (1); an outer tube (5) is sleeved on the outer side surface of the thermal insulation cotton (3), wherein the inner wall of the outer tube (5) is fixed to the outer side surface of the buffer frame (4); the inner tube (1) and the outer tube (5) are both tubular structures made of modified polypropylene material.

2. The pressure-resistant and low-temperature-resistant MPP power pipe according to claim 1, characterized in that: The auxiliary frame (2) comprises a positioning ring (21), a ball (22) and a traction rope (23). The positioning ring (21) is provided in plurality, and the outer side surface of the positioning ring (21) is rotatably mounted with the ball (22) through a ball joint, and the outer side surface of the ball (22) is arranged in close contact with the inner wall of the inner tube (1); the traction ropes (23) are fixed between adjacent positioning rings (21), wherein the traction ropes (23) are all made of a rope structure woven from steel wires.

3. The pressure-resistant and low-temperature-resistant MPP power pipe according to claim 1, characterized in that: The buffer frame (4) comprises a first limiting ring (41), a second limiting ring (42) and a spiral spring (43), wherein the first limiting ring (41) and the second limiting ring (42) are both arranged between adjacent thermal insulation cottons (3); the outer side surface of the first limiting ring (41) is fixed to the inner wall of the outer tube (5), and the inner wall of the first limiting ring (41) is provided with a first groove; the second limiting ring (42) is fixed to the outer side surface of the inner tube (1), wherein the outer side surface of the second limiting ring (42) is provided with a second groove; the inner side of the spiral spring (43) is fixed to the inside of the second groove by buckling, and the outer side of the spiral spring (43) is fixed to the inside of the first groove by buckling.

4. The pressure-resistant and low-temperature-resistant MPP power pipe according to claim 1, characterized in that: A plurality of protrusions are fixed on the outer side surface of the outer tube (5), and a steel wire mesh is fixed on the inner wall of the outer tube (5).

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