High-stability mpp power cable protection pipe

Abstract

The application relates to the technical field of power cables, in particular to a high-stability MPP power cable protection pipe, vice pipes are connected at two ends of a main pipe through connecting plates, positioning rings are located in the inner cavities of the vice pipes, a plurality of installation grooves are equidistantly arranged on the outer walls of the two vice pipes, first protrusions are mirror-imaged arranged at the bottom ends of the sidewalls of the installation grooves, a plurality of guide grooves are arranged on the connecting plates along the axial direction of the main pipe, a guide plate is arranged on the outer wall of the main pipe, one end of a fixing mechanism is located in the vice pipe, the other end of the fixing mechanism is located in a guide groove through the guide groove, an adjusting ring is sleeved on the outer side of the guide plate, and the two fixing mechanisms are sleeved on the outer walls of the two vice pipes; the pipe material is fixed by using two fixing modes of heating and fixing mechanism, the firmness and durability of the pipe material at the connection position are improved; the fixing mechanism is moved in one direction, the adjusting ring matched with the fixing mechanism can simplify the pipe material connection steps and save labor.

Description

Technical Field

[0001] This invention relates to the field of power cable technology, specifically to a highly stable MPP power cable protection tube. Background Technology

[0002] PP power pipes are divided into ordinary type and reinforced type. Reinforced type is further divided into open-cut pipe and trenchless pipe. MPP trenchless pipe is also known as MPP jacking pipe, MPP traction pipe, or MPP pulling pipe. Traditional MPP power cable protection pipes are connected by heating the pipes individually. However, because the connection is not integrally formed, its strength and durability are lower than the strength of the pipe itself, and it is prone to cracking during long-term use. In addition, since the construction location is outdoors, this method requires a hot melt machine to heat the pipes, which requires a lot of equipment. After heating, the two pipes need to be aligned manually, which is quite troublesome. Summary of the Invention

[0003] The purpose of this invention is to provide a highly stable MPP power cable protection pipe to solve the problems mentioned in the background art, such as the low strength and durability of the single heating method, the need for a lot of equipment, and the cumbersome operation.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a highly stable MPP power cable protection pipe, comprising: a main pipe, a secondary pipe, a positioning ring, a heating mechanism, an installation groove, a first protrusion, a guide groove, a guide plate, a guide groove, a fixing mechanism, an adjusting ring, and a fixing mechanism. The main pipe has an annular pipe structure with open ends. There are two secondary pipes, both of which are annular pipe structures. The two secondary pipes are connected to both ends of the main pipe via connecting plates and are located on the same axis as the main pipe. The positioning ring is located within the cavity of the secondary pipe and is mounted on the connecting plate. An annular space is formed between the outer wall of the positioning ring and the inner wall of the secondary pipe. The heating mechanism is installed in the annular space formed between the positioning ring and the secondary pipe. Several installation grooves are provided, equidistantly spaced on the outer walls of the two secondary pipes and extending through... The number of first protrusions on the outer wall of the secondary pipe is twice the number of mounting slots. The first protrusions are mirror images of each other at the bottom of the side wall of the mounting slot. There are several guide slots, which are respectively opened on the connecting plate along the axis of the main pipe. The guide plate has a ring structure and is installed on the outer wall of the main pipe. The number of guide slots matches the number of mounting slots and corresponds to the positions of the mounting slots on the two secondary pipes. The fixing mechanism has a rectangular plate structure. One end of the fixing mechanism is located inside the secondary pipe, and the other end of the fixing mechanism is located inside the guide slot via the guide slot. The adjusting ring is sleeved on the outside of the guide plate. The inner wall of the adjusting ring is provided with a second thread, which is threadedly engaged with the fixing mechanism. There are two fixing mechanisms, which are respectively sleeved on the outer walls of the two secondary pipes and fixed by bolts.

[0005] Preferably, the mounting grooves on the outer walls of the two secondary pipes are equidistant and staggered.

[0006] Preferably, the outer wall of the adjusting ring has a polygonal cross-section, and the outer walls of the two secondary pipes, on the side closest to the main pipe, are respectively provided with auxiliary blocks with a polygonal cross-section.

[0007] Preferably, the two connecting plates are mirror-mounted with pads corresponding to the two side walls of the adjusting ring.

[0008] Preferably, the heating mechanism includes: a first housing, a heating wire, and a second housing. The first housing is disposed within the annular space formed between the positioning ring and the secondary pipe, and the first housing has a cavity structure, with the open end of the cavity pointing outward along the axial direction of the main pipe. The heating wire is disposed within the cavity of the first housing, and the input end of the heating wire extends to the outside of the secondary pipe. The second housing is disposed at the open end of the first housing.

[0009] Preferably, the first housing is made of heat-insulating material and the second housing is made of heat-conducting material, so that the heat from the heating wire can be dissipated from the second housing.

[0010] Preferably, the fixing mechanism includes: a first fixing plate, a second fixing plate, a mounting block, a limiting block, a first ratchet, a second ratchet, a first thread, and a fixing pin. The first fixing plate is located in a guide groove, the second fixing plate is connected to the first fixing plate and extends through the guide groove to the inner wall of the secondary pipe, the mounting block is located in a mounting groove, the two limiting blocks are mirror images of each other on the two side walls of the mounting block, the limiting blocks abut against the first protrusion, the first ratchet is located on the upper wall of the second fixing plate, the second ratchet is located on the lower wall of the mounting block and cooperates with the first ratchet, the first thread is located on the upper wall of the first fixing plate and cooperates with the second thread on the inner wall of the adjusting ring, and the number of fixing pins is several and they are equidistantly arranged on the lower wall of the second fixing plate.

[0011] Preferably, the second thread on the inner wall of the adjusting ring is a bidirectional thread, which is adapted to the first thread on the first fixed plate in the guide groove of the two secondary pipes.

[0012] Preferably, the limiting mechanism includes: a limiting ring, a second protrusion, and a baffle. The limiting ring is sleeved on the outer wall of the secondary pipe. The number of the second protrusions is twice that of the mounting grooves, and they are equidistantly arranged on the inner wall of the limiting ring. Every two second protrusions correspond to the position of the first protrusion in the same mounting groove. The number of baffles corresponds to the number of mounting grooves, and they are respectively arranged at the outer end of the inner wall of the limiting ring.

[0013] Preferably, the distance between the second protrusion and the first protrusion is less than the thickness of the limiting block.

[0014] The present invention proposes a highly stable MPP power cable protection pipe, which has the following advantages: 1. This invention utilizes both heating and fixing mechanisms to fix the pipe, thereby improving the strength and durability of the pipe at the connection point; 2. This invention simplifies the steps of connecting pipes and saves labor by using a unidirectional moving fixing mechanism and an adjusting ring that works with it. 3. This invention eliminates the need for carrying excessive equipment, thus improving installation efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the present invention.

[0016] Figure 2 This is a schematic diagram of the first partial structure of the present invention.

[0017] Figure 3 This is a first partial cross-sectional view of the present invention.

[0018] Figure 4 This is an additional schematic diagram of the first part of the present invention.

[0019] Figure 5 This is a schematic diagram of the fixing mechanism of the present invention.

[0020] Figure 6 This is a schematic diagram of the heating mechanism of the present invention.

[0021] Figure 7 This is a front view of the fixing mechanism of the present invention.

[0022] Figure 8 This is a schematic diagram of the limiting mechanism of the present invention.

[0023] Figure 9 This is a cross-sectional view of the adjustment ring of the present invention.

[0024] Figure 10 This is a first partial front view of the present invention.

[0025] In the diagram: 1. Main pipe; 2. Secondary pipe; 3. Connecting plate; 4. Positioning ring; 5. Heating mechanism; 51. First housing; 52. Heating wire; 53. Second housing; 6. Mounting groove; 7. First protrusion; 8. Guide groove; 9. Guide plate; 10. Guide groove; 11. Fixing mechanism; 111. First fixing plate; 112. Second fixing plate; 113. Mounting block; 114. Limiting block; 115. First ratchet; 116. Second ratchet; 117. First thread; 118. Fixing pin; 12. Adjusting ring; 13. Second thread; 14. Limiting mechanism; 141. Limiting ring; 142. Second protrusion; 143. Baffle; 15. Auxiliary block; 16. Pad. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] Please see Figure 1-10 This invention provides a high-stability MPP power cable protection pipe technical solution. Its detailed connection method is a well-known technology in the field. The working principle and process are mainly described below. The specific work is as follows.

[0028] A high-stability MPP power cable protection pipe includes: a main pipe 1, a secondary pipe 2, a positioning ring 4, a heating mechanism 5, an installation groove 6, a first protrusion 7, a guide groove 8, a guide plate 9, a guide groove 10, a fixing mechanism 11, and an adjusting ring 12. The main pipe 1 has an annular pipe structure with open ends, serving as a connection point for two pipes. There are two secondary pipes 2, both of which are annular pipe structures. The two secondary pipes 2 are connected to both ends of the main pipe 1 via connecting plates 3 and are located on the same axis as the main pipe 1. The two secondary pipes 2 serve as fixing positions for the pipes at both ends. The positioning ring 4 is located inside the secondary pipe 2 and is mounted on the connecting plate 3. An annular space is formed between the outer wall of the positioning ring 4 and the inner wall of the secondary pipe 2. The pipe is inserted into this annular space. The heating mechanism 5 is installed in the annular space formed between the positioning ring 4 and the secondary pipe 2 to heat and melt the pipe at this position. There are several installation grooves 6, which are equidistantly opened on the outer walls of the two secondary pipes 2 and penetrate through the secondary pipes 2. The outer wall of the main pipe 1 has two first protrusions 7, the number of which is twice the number of mounting slots 6. The first protrusions 7 are mirror images of the bottom of the side wall of the mounting slots 6. There are several guide slots 8, which are opened on the connecting plate 3 along the axis of the main pipe 1. The guide plate 9 has a ring structure and is installed on the outer wall of the main pipe 1. It adopts a fixed installation connection method. The number of guide slots 10 matches the number of mounting slots 6 and corresponds to the positions of the mounting slots 6 on the two secondary pipes 2. The fixing mechanism 11 has a rectangular plate structure. One end of the fixing mechanism 11 is located inside the secondary pipe 2, and the other end of the fixing mechanism 11 is located inside the guide slot 10 via the guide slot 8. The thickness of the end of the fixing mechanism 11 located inside the guide slot 10 matches the depth of the guide slot 10. The adjusting ring 12 is sleeved on the outside of the guide plate 9. The inner wall of the adjusting ring 12 is provided with a second thread 13, which is threadedly engaged with the fixing mechanism 11. There are two fixing mechanisms 11, which are sleeved on the outer walls of the two secondary pipes 2 and fixed by bolts.

[0029] In this embodiment, the mounting grooves 6 on the outer walls of the two secondary pipes 2 are opened at equal intervals, and the mounting grooves 6 on the two secondary pipes 2 are staggered to ensure that the rotation of the adjusting ring 12 can simultaneously control the fixing mechanisms 11 on both sides.

[0030] In this embodiment, the outer wall of the adjusting ring 12 has a polygonal cross-section. The outer walls of the two secondary pipes 2 and the side closest to the main pipe 1 are respectively provided with auxiliary blocks 15 with polygonal cross-sections. The adjusting ring 12 can be rotated by using tools and the auxiliary blocks 15 on both sides.

[0031] In this embodiment, two connecting plates 3 are mirror-mounted with pads 16, which correspond to the two side walls of the adjusting ring 12. When the adjusting ring 12 contacts the pads 16, the friction between them is reduced.

[0032] More specifically, the heating mechanism 5 includes: a first housing 51, a heating wire 52, and a second housing 53. The first housing 51 is disposed in the annular space formed between the positioning ring 4 and the secondary pipe 2, and the first housing 51 has a cavity structure, with the open end of the cavity pointing outward along the axial direction of the main pipe 1. The heating wire 52 is disposed in the inner cavity of the first housing 51, and the input end of the heating wire 52 extends to the outside of the secondary pipe 2. The resistance of the heating wire 52 can ensure that the temperature during heating can melt the pipe. The second housing 53 is disposed at the open end of the first housing 51. The second housing 53 is made of metal, and the end face of the second housing 53 pointing outward is pointed, which facilitates insertion into the pipe wall during heating.

[0033] In this embodiment, the first housing 51 is a heat-insulating material and the second housing 53 is a heat-conducting material. The heat from the heating wire 52 can be dissipated from the second housing 53, so that the heat is directed to the pipe, causing the pipe to melt, while preventing it from affecting other components.

[0034] More specifically, the fixing mechanism 11 includes: a first fixing plate 111, a second fixing plate 112, a mounting block 113, a limiting block 114, a first ratchet 115, a second ratchet 116, a first thread 117, and a fixing pin 118. The first fixing plate 111 is located in the guide groove 10, and the thickness of the first fixing plate 111 matches the depth of the guide groove 10. The second fixing plate 112 is connected to the first fixing plate 111 and extends through the guide groove 8 to the inner wall of the secondary pipe 2. The thickness of the second fixing plate 112 is less than that of the first fixing plate 111. The mounting block 113 is located in the mounting groove 6. The two limiting blocks 114 are mirror images of the two side walls of the mounting block 113. The limiting blocks 114 are aligned with the first protrusion 7. The first ratchet 115 is disposed on the upper wall of the second fixing plate 112, and the second ratchet 116 is disposed on the lower wall of the mounting block 113, cooperating with the first ratchet 115. The use of the first ratchet 115 and the second ratchet 116 allows the second fixing plate 112 to move towards the main pipe 1, while limiting the reverse movement of the second fixing plate 112. The first thread 117 is disposed on the upper wall of the first fixing plate 111, cooperating with the second thread 13 on the inner wall of the adjusting ring 12. The number of fixing pins 118 is several, and they are equidistantly disposed on the lower wall of the second fixing plate 112. The first fixing plate 111 is in contact with the outer wall of the pipe, and the fixing pins 118 increase the friction between the two.

[0035] In this embodiment, the second thread 13 on the inner wall of the adjusting ring 12 is a bidirectional thread, which is adapted to the first thread 117 on the first fixing plate 111 in the guide groove 10 of the two secondary pipes 2, so that when the adjusting ring 12 rotates in one direction, the fixing mechanisms 11 on both sides can move towards each other or backward.

[0036] More specifically, the limiting mechanism 14 includes: a limiting ring 141, second protrusions 142, and baffles 143. The limiting ring 141 is sleeved on the outer wall of the secondary pipe 2. The number of second protrusions 142 is twice that of the mounting grooves 6, and they are equidistantly arranged on the inner wall of the limiting ring 141. Every two second protrusions 142 correspond to the positions of the first protrusions 7 in the same mounting groove 6. The number of baffles 143 corresponds to the number of mounting grooves 6, and they are respectively arranged on the outer ends of the inner wall of the limiting ring 141. The baffles 143 cooperate with the limiting ring 141 to limit the position of the mounting block 113.

[0037] In this embodiment, the distance between the second protrusion 142 and the first protrusion 7 is less than the thickness of the limiting block 114. This ensures that when the first ratchet 115 and the second ratchet 116 are in relative motion, the distance of displacement of the limiting block 114 between the first protrusion 7 and the second protrusion 142 ensures the smooth relative displacement of the first ratchet 115 and the second ratchet 116, while blocking their reverse movement.

[0038] The working principle of the example is as follows: In use, firstly, pull the first fixing plate 111 and the second fixing plate 112 on the two secondary pipes 2 outward to their maximum limit. At this time, the first fixing plate 111 is located at the maximum limit at both ends of the guide groove 10. Then, the limiting ring 141 is sleeved on the outer wall of the pipe. Utilizing the elastic deformation of the second fixing plate 112, one end of it located outside the secondary pipe 2 is opened. Insert the pipe into the secondary pipe 2 until the pipe is inserted into the annular space formed between the positioning ring 4 and the secondary pipe 2 and abuts against the second housing 53. Then, loosen the second fixing plate 112. At this time, the side of the second fixing plate 112 with the fixing pin 118 will abut against the outer wall of the pipe. Then, place the mounting block 113 in the mounting groove 6 and correspondingly sleeve the limiting ring 141 on the outer wall of the secondary pipe 2. At this time, the position of the mounting block 113 is limited. Under the action of the first ratchet 115 and the second ratchet 116, the second fixing plate 112 can only move towards the main pipe. 1. Move one side. At this time, connect the input end of the heating wire 52 to the power supply and the matching adapter to ensure stable heating of the heating wire. During this period, try to rotate the adjusting ring 12. Through the cooperation of the first thread 117 on the first fixing plate 111 and the second thread 13 on the adjusting ring 12, the first fixing plates 111 on both sides tend to move towards each other. When the pipe is heated to the critical state, rotating the adjusting ring 12 will cause the position of the pipe to deform under the movement of the first fixing plate 111 and the second fixing plate 112, and accumulate in the annular space formed between the positioning ring 4 and the secondary pipe 2, surrounding the heating device and filling the guide groove 8. Stop heating, and the melted pipe will slowly solidify. After solidification, the positions of the first fixing plate 111 and the second fixing plate 112 will be fixed to maintain the fixing effect on the pipe. At the same time, the pipes in the two secondary pipes 2 will also remain fixed after melting and solidification.

[0039] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A highly stable MPP power cable protection pipe, characterized in that, include: The main pipe (1) has a ring-shaped pipe structure and is open at both ends; There are two secondary pipes (2), both of which are annular tubular structures. The two secondary pipes (2) are connected to the two ends of the main pipe (1) respectively through connecting plates (3), and are located on the same axis as the main pipe (1). Positioning ring (4), the positioning ring (4) is located in the inner cavity of the secondary pipe (2) and is set on the connecting plate (3). The outer wall of the positioning ring (4) and the inner wall of the secondary pipe (2) form an annular space. Heating mechanism (5), which is installed in the annular space formed between positioning ring (4) and secondary pipe (2); The number of mounting slots (6) is several, and the several mounting slots (6) are respectively equidistantly opened on the outer wall of the two secondary pipes (2) and penetrate the outer wall of the secondary pipes (2); The number of the first protrusion (7) is twice the number of the mounting groove (6), and the first protrusion (7) is mirror-image disposed at the bottom end of the side wall of the mounting groove (6); Guide groove (8), the number of guide grooves (8) is several, and several guide grooves (8) are respectively opened on the connecting plate (3) along the axis of the main pipe (1); Guide plate (9), the guide plate (9) is in the form of a ring and is installed on the outer wall of the main pipe (1); Guide grooves (10), the number of which matches the number of mounting grooves (6), and each corresponding to the position of the mounting grooves (6) on the two secondary pipes (2); The fixing mechanism (11) is a rectangular plate structure. One end of the fixing mechanism (11) is located in the secondary pipe (2), and the other end of the fixing mechanism (11) is located in the guide groove (10) via the guide groove (8). Adjusting ring (12), the adjusting ring (12) is sleeved on the outside of the guide plate (9), the inner wall of the adjusting ring (12) is provided with a second thread (13), and is threadedly engaged with the fixing mechanism (11); The fixing mechanism (11) is two in number, and the two fixing mechanisms (11) are respectively sleeved on the outer wall of the two secondary pipes (2) and fixed by bolts; The fixing mechanism (11) includes: The first fixing plate (111) is located in the guide groove (10); The second fixing plate (112) is connected to the first fixing plate (111) and extends to the inner wall of the secondary pipe (2) via the guide groove (8); Mounting block (113), which is located in mounting slot (6); Limiting blocks (114), two of the limiting blocks (114) are mirror images disposed on the two side walls of the mounting block (113), and the limiting blocks (114) abut against the first protrusion (7); The first ratchet (115) is disposed on the upper wall surface of the second fixing plate (112); The second ratchet (116) is disposed on the lower wall surface of the mounting block (113) and engages with the first ratchet (115); The first thread (117) is provided on the upper wall surface of the first fixed plate (111) and cooperates with the second thread (13) on the inner wall of the adjusting ring (12); The number of fixed pins (118) is several, and they are equidistantly arranged on the lower wall surface of the second fixed plate (112).

2. The high-stability MPP power cable protection pipe according to claim 1, characterized in that: The mounting grooves (6) on the outer walls of the two secondary pipes (2) are opened at equal intervals, and the mounting grooves (6) on the two secondary pipes (2) are staggered.

3. The high-stability MPP power cable protection pipe according to claim 1, characterized in that: The outer wall of the regulating ring (12) has a polygonal cross-section, and the outer walls of the two secondary pipes (2) and the side closest to the main pipe (1) are respectively provided with auxiliary blocks (15) with polygonal cross-sections.

4. The high-stability MPP power cable protection pipe according to claim 1, characterized in that: The two connecting plates (3) are mirror-mounted with pads (16) corresponding to the two side walls of the adjusting ring (12).

5. The high-stability MPP power cable protection pipe according to claim 1, characterized in that, The heating mechanism (5) includes: The first housing (51) is disposed in the annular space formed between the positioning ring (4) and the secondary pipe (2), and the first housing (51) has a cavity structure, and the opening end of the cavity points outward along the axis of the main pipe (1); Heating wire (52) is disposed in the inner cavity of the first housing (51), and the input end of the heating wire (52) extends to the outside of the secondary pipe (2); The second housing (53) is disposed at the open end of the first housing (51).

6. The high-stability MPP power cable protection pipe according to claim 5, characterized in that: The first housing (51) is a heat-insulating material, the second housing (53) is a heat-conducting material, and the heat of the heating wire (52) can be dissipated from the second housing (53).

7. The high-stability MPP power cable protection pipe according to claim 1, characterized in that: The second thread (13) on the inner wall of the adjusting ring (12) is a bidirectional thread, which is compatible with the first thread (117) on the first fixing plate (111) in the guide groove (10) of the two secondary pipes (2).

8. The high-stability MPP power cable protection pipe according to claim 1, characterized in that, The high-stability MPP power cable protection pipe also includes a limiting mechanism (14), which includes: A limiting ring (141) is fitted onto the outer wall of the secondary pipe (2); The number of the second protrusions (142) is twice that of the mounting groove (6), and they are equidistantly arranged on the inner wall of the limiting ring (141). Each pair of the second protrusions (142) corresponds to the position of the first protrusion (7) in the same mounting groove (6). The number of baffles (143) corresponds to the number of mounting grooves (6), and they are respectively set at the outer end of the inner wall of the limiting ring (141).

9. The high-stability MPP power cable protection pipe according to claim 8, characterized in that: The distance between the second protrusion (142) and the first protrusion (7) is less than the thickness of the limiting block (114).

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