Combined pressure-resistant flame-retardant power cable sheath tube structure

Abstract

The invention relates to the field of cable protection, in particular to a combined pressure-resistant flame-retardant power cable sheath tube structure. The combined pressure-resistant flame-retardant power cable sheath pipe structure comprises two straight pipes and a corrugated pipe, and the corrugated pipe is located between the two straight pipes and fixed through a flange. The straight pipe and the corrugated pipe are respectively composed of two first half pipes and two second half pipes, and the contact surfaces of the two first half pipes are perpendicular to the contact surfaces of the two second half pipes. In the structure of the combined pressure-resistant flame-retardant power cable sheath pipe provided by the invention, the straight pipe and the corrugated pipe are both formed by butt joint of the half pipes, so that during installation, the two half pipes can directly sleeve an area to be protected on a cable, and then the locking assembly is used for reinforcement, so that the installation of the whole sheath pipe is more convenient.

Description

Technical Field

[0001] The present invention relates to the field of cable protection, and in particular to a combined pressure-resistant and flame-retardant power cable sheath tube structure. Background Art

[0002] A cable is a device used to transmit electrical energy or signals, typically consisting of several conductors or groups of conductors. When laying cables in various locations (such as where cables enter and exit building areas, in tunnels, and in trenches), the cable surface may rub against foreign objects, causing damage. To address this, a protective sleeve is installed in the appropriate area of ​​the cable to prevent damage.

[0003] Traditional conduits are integral tubes. During installation, one end of the cable is first inserted through the conduit, which is then continuously moved along the cable to adjust its position until it reaches the desired protection area. However, if the cable is long and the area to be protected is near the center of the cable, adjusting the conduit position can be cumbersome.

[0004] Therefore, it is necessary to provide a new combined pressure-resistant flame-retardant power cable sheath structure to solve the above technical problems. Summary of the Invention

[0005] In order to solve the above technical problems, the present invention provides a combined pressure-resistant and flame-retardant power cable sheath tube structure.

[0006] The combined pressure-resistant and flame-retardant power cable sheath structure provided by the present invention comprises two straight pipe sections and one corrugated pipe section, wherein the corrugated pipe is located between the two straight pipe sections and is fixed by a flange; The straight tube and the corrugated tube are respectively composed of two first half tubes and two second half tubes, and the contact surfaces of the two first half tubes and the contact surfaces of the two second half tubes are perpendicular to each other; A set of elastic extrusion components is fixed on each of the first half pipes, and the two sets of elastic extrusion components are symmetrically arranged to fix the cables passing through the straight pipe by clamping; A locking assembly is also fixed to the outside of the straight tube via an elastic extrusion assembly. The locking assembly includes two sets of base frames, which are symmetrically fixed to the two first half-tubes. An arc-shaped connecting plate is fixed between the two sets of base frames. The base frames and the connecting plate form an annular outer frame that locks the two first half-tubes. A plurality of auxiliary support members are also fixed on the connecting plate. The auxiliary support members include a contact plate. The distance between the contact plate and the straight tube is greater than the distance between the connecting plate and the straight tube.

[0007] Preferably, the top end of the first half pipe has an integrally connected rectangular shell, the shell protruding from the outer wall of the first half pipe, the interior of which has a content space connected to the straight pipe, and the shell has an insertion hole that passes through the inside and outside of the first half pipe; The side ends of the two first half tubes are each provided with a tooth plate and a tooth groove for inserting the tooth plate, wherein the tooth plate on one of the first half tubes has an embedding groove, and the tooth plate on the other first half tube has a fillet embedded in the embedding groove.

[0008] Preferably, the elastic extrusion assembly includes a mounting tube having a sliding cavity inside and a thread outside. The mounting tube is plugged into the shell along the insertion hole so that one end is located inside the straight tube and the other end is located outside the straight tube. A baffle is welded to the outer circumference of the mounting tube, which is pressed against the inner wall of the shell. A sliding rod is slidably connected in the sliding cavity inside the mounting tube, one end of the sliding rod passes through the mounting tube and is welded and fixed to a mounting seat located inside the straight tube, the sliding rod is also provided with a spring that presses against the mounting seat and the baffle, and the lower end of the mounting seat is bolted with two elastic metal sheets for squeezing and positioning the cable.

[0009] Preferably, the two elastic metal sheets are distributed in a V-shape, and the elastic metal sheets are in an arc shape from the center to the two ends toward the inner wall of the first half tube.

[0010] Preferably, the volume of the content space inside the shell is larger than the volume of the mounting seat, so that the mounting seat can completely enter the content space, and the elastic metal sheet fits the inner wall of the first half tube.

[0011] Preferably, the base frame includes a sleeve, the sleeve is sleeved on the mounting tube, and two sets of symmetrically arranged fixing frames are welded and fixed to the circumferential outer wall of the sleeve, a positioning plate is welded and fixed to the other end of the fixing frame, and two symmetrically arranged first positioning rods are welded and fixed to the other side of the positioning plate, and the circumferential outer wall of the first positioning rod has a thread; The connecting plate is arc-shaped, has holes at both ends, and is sleeved on the first positioning rods symmetrically positioned in the two sets of base frames. The first positioning rods are also threaded with second nuts for locking the connecting plate, and the connecting plate also has an arc-shaped slide.

[0012] Preferably, the mounting tube is further threadedly connected with a locking sleeve and a first nut that fixes the mounting tube to the housing.

[0013] Preferably, the auxiliary support member also includes a second positioning rod, which is inserted into the connecting plate along the slide and fixed by a third nut. A ring seat is sleeved and fixed on the second positioning rod, and two V-shaped support arms are welded and fixed to the circumferential outer wall of the ring seat. The contact plate is welded and fixed to the two support arms to form a fan-shaped support frame.

[0014] Preferably, a rubber pad is bonded to the outer surface of the contact plate.

[0015] Compared with related technologies, the combined pressure-resistant flame-retardant power cable sheath structure provided by the present invention has the following beneficial effects: 1. The casing used for the entire protection is composed of a straight tube and a corrugated tube. The corrugated tube can be bent and adjusted so that the entire casing is in a curved state, so it can be applied to areas where the cable is bent; 2. Both the straight tube and the corrugated tube are made up of half-tubes butted together. Therefore, during installation, the two half-tubes can be directly placed on the area to be protected on the cable, and then reinforced with locking components, making the installation of the entire casing more convenient. 3. The elastic extrusion component can elastically clamp the cable passing through the casing to ensure that the entire casing is firmly fixed to the cable and prevent it from being skewed. At the same time, the elastic extrusion component serves as the installation basis of the locking component, making the elastic extrusion component and the locking component have the characteristics of quick release; 4. The contact plate in the auxiliary support member can abut against objects on the outside of the cable that may cause scratches, so as to prevent the sleeve, elastic extrusion component and locking component from contacting and scratching the object, thereby further protecting the entire device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A structural schematic diagram of a preferred embodiment of the combined pressure-resistant and flame-retardant power cable sheath tube structure provided by the present invention; Figure 2 This is a schematic structural diagram of the first half-tube connection shown in the present invention; Figure 3 This is a schematic diagram of the structure of the straight pipe and the corrugated pipe shown in the present invention; Figure 4 The present invention shows Figure 1 Schematic diagram of the local structure; Figure 5 This is a schematic structural diagram of the elastic extrusion assembly and the base frame shown in the present invention; Figure 6 It is a structural schematic diagram of the elastic metal sheet shown in the present invention; Figure 7 It is a structural schematic diagram of the locking assembly shown in the present invention; Figure 8 This is a schematic structural diagram of the auxiliary support member and the connecting plate shown in the present invention.

[0017] Reference numerals in the figure: 1, straight tube; 11, first half tube; 12, shell; 13, tooth plate; 14, embedding groove; 15, embedding strip; 2. Bellows; 21. Second half pipe; 3. Elastic extrusion assembly; 31. Mounting cylinder; 32. Stop plate; 33. Sliding rod; 34. Spring; 35. Mounting seat; 36. Elastic metal sheet; 37. First nut; 4. Locking assembly; 41. Sleeve; 42. Fixing bracket; 43. Positioning plate; 44. First positioning rod; 45. Connecting plate; 46. Second nut; 47. Slideway; 5. Auxiliary support member; 51. Second positioning rod; 52. Third nut; 53. Ring seat; 54. Support arm; 55. Contact plate; 56. Rubber pad. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0019] The specific implementation of the present invention is described in detail below with reference to specific embodiments.

[0020] See also Figures 1 to 8 An embodiment of the present invention provides a combined pressure-resistant and flame-retardant power cable sheath tube structure, which includes a straight tube 1, a corrugated tube 2, an elastic extrusion component 3, a locking component 4 and an auxiliary support member 5.

[0021] For straight pipe 1 and corrugated pipe 2; See also Figures 1 to 3 The straight pipe 1 has two sections, and the bellows 2 is one section. The bellows 2 is located between the two sections of the straight pipe 1 and fixed by a flange. The straight pipe 1 and the bellows 2 are respectively composed of two first half-pipes 11 and two second half-pipes 21. The contact surfaces of the two first half-pipes 11 and the contact surfaces of the two second half-pipes 21 are perpendicular to each other. The top end of the first half pipe 11 has an integrally connected rectangular housing 12. The housing 12 protrudes from the outer wall of the first half pipe 11 and has a content space inside that is connected to the straight pipe 1. The housing 12 has a through hole that passes through the inside and outside of the first half pipe 11. The side ends of the two first half tubes 11 both have tooth plates 13 and tooth grooves for inserting the tooth plates 13 . The tooth plate 13 on one of the first half tubes 11 has an embedding groove 14 , while the tooth plate 13 on the other first half tube 11 has a fillet 15 embedded in the embedding groove 14 .

[0022] It should be noted that the straight tube 1 is preferably a PVC sheathed tube, and the corrugated tube 2 is a rubber tube. The corrugated tube 2 can be bent and adjusted. Therefore, when the cable itself needs to bend, the entire tube can adapt to the bending adjustment of the cable. The specific number of straight tubes 1 and corrugated tubes 2 is not limited to the description in this case. If the cable itself does not need to bend, then the corrugated tube 2 can be omitted, and the cable can be protected by only the straight tube 1; if the cable has many bending areas, the number of straight tubes 1 and corrugated tubes 2 can be appropriately increased. The straight tube 1 has two first half tubes 11. The side ends of the first half tubes 11 are provided with tooth plates 13 and tooth grooves, so that the two first half tubes 11 can be easily connected. At the same time, a embedding groove 14 and a embedding strip 15 are also provided, which can make the initial connection between the two first half tubes 11 more compact. After the two first half-tubes 11 are butted together and placed on the outside of the cable, the corrugated tube 2 can be installed. The two second half-tubes 21 are placed on the outside of the cable in the same way and then fixed to the ends of the straight tube 1 with bolts, thereby achieving the connection between the straight tube 1 and the corrugated tube 2. The contact surface in the first half pipe 11 and the contact surface in the second half pipe 21 are vertically arranged, so that after the straight pipe 1 and the corrugated pipe 2 are flange-connected, they can play a certain limiting role with each other, making the half pipes more stable.

[0023] For the elastic extrusion component 3; See also Figure 5 and Figure 6 The elastic extrusion assembly 3 includes a mounting cylinder 31, which has a sliding cavity inside and a thread on the outside. The mounting cylinder 31 is inserted into the shell 12 along the insertion hole so that one end of the mounting cylinder 31 is located inside the straight tube 1 and the other end is located outside the straight tube 1. A baffle 32 is welded to the outer wall of the mounting cylinder 31 and pressed against the inner wall of the shell 12. A slide rod 33 is slidably connected to the sliding cavity inside the mounting tube 31. One end of the slide rod 33 passes through the mounting tube 31 and is welded to a mounting seat 35 located inside the straight tube 1. A spring 34 is also sleeved on the slide rod 33 to press against the mounting seat 35 and the baffle 32. Two elastic metal sheets 36 for squeezing and positioning the cable are bolted to the lower end of the mounting seat 35. The two elastic metal sheets 36 are distributed in a V shape, and the elastic metal sheets 36 are arc-shaped from the center to the two ends toward the inner wall of the first half tube 11. At the same time, the two elastic metal sheets 36 are distributed in a V-shape, and the elastic metal sheets 36 are in an arc shape from the center to the two ends facing the inner wall of the first half tube 11 .

[0024] The cam 35 is pressed against the outer wall of the housing 12 and the retaining plate 32 is pressed against the inner wall of the housing 12. The inner wall of the cam 35 is provided with a mounting seat 35 at one end. The mounting seat 35 is subjected to the elastic force of the spring 34, so that it has a tendency to move toward the axis of the straight tube 1. The mounting seat 35 has two elastic metal pieces 36 distributed in a V shape. The elastic metal pieces 36 can directly contact the cable and squeeze the cable through the elastic force of the spring 34. Therefore, the two sets of elastic extrusion components 3 can cooperate with each other to clamp and fix on the cable, thereby positioning the straight tube 1 and making it stable on the area to be protected on the cable to prevent it from slipping and deviating from the area to be protected. Because the mounting seat 35 has a certain displacement floating amount, it can adapt to different types of cables and has a relatively wider range of applications. The two sections of the elastic metal sheet 36 are arc-shaped, which can prevent its edge from being in direct contact with the cable and thus not scratching the cable surface. At the same time, when the position of the sleeve after installation is not accurate enough, a short distance position adjustment can be performed.

[0025] For locking component 4; See also Figure 6 and Figure 7 The locking assembly 4 includes two sets of base frames, which are symmetrically fixed on the two first half-tubes 11. An arc-shaped connecting plate 45 is fixed between the two sets of base frames. The base frames and the connecting plate 45 form an annular outer frame for locking the two first half-tubes 11. The base frame includes a sleeve 41, which is sleeved on the mounting tube 31. Two sets of symmetrically arranged fixing brackets 42 are welded and fixed to the circumferential outer wall of the sleeve 41. A positioning plate 43 is welded and fixed to the other end of the fixing bracket 42. Two symmetrically arranged first positioning rods 44 are welded and fixed to the other side of the positioning plate 43. The circumferential outer wall of the first positioning rod 44 has a thread. The connecting plate 45 is arc-shaped, with holes at both ends, and is sleeved on the first positioning rods 44 symmetrically located in the two sets of base frames. The first positioning rods 44 are also threadedly connected to the second nuts 46 that lock the connecting plate 45. The connecting plate 45 also has an arc-shaped slide 47. The mounting tube 31 is further threadedly connected to a locking sleeve 41 and a first nut 37 is used to fix the mounting tube 31 to the housing 12 .

[0026] It should be noted that in the locking assembly 4, the sleeve 41 can be directly sleeved on the mounting cylinder 31 and then fixed by the first nut 37. This can achieve both the fixation of the base frame and the fixation of the mounting cylinder 31, thereby facilitating the disassembly and assembly of the elastic extrusion assembly 3 and the base frame. The connecting plate 45 is the main fixing structure. The two groups of base frames are respectively fixed on the two first half pipes 11, and the connecting plate 45 can connect the two base frames, that is, the hole at its end can be sleeved on the first positioning rod 44, and then fixed by the second nut 46 to cooperate with the base frame to form an annular frame structure, so that the two first half pipes 11 can be locked and reinforced to complete the assembly and fixation of the straight pipe 1.

[0027] For the auxiliary support 5; See also Figure 8 The auxiliary support member 5 also includes a second positioning rod 51, which is inserted into the connecting plate 45 along the slide 47 and fixed by a third nut 52. A ring seat 53 is sleeved and fixed on the second positioning rod 51. Two support arms 54 arranged in a V shape are welded and fixed to the outer wall of the ring seat 53. The contact plate 55 is welded and fixed to the two support arms 54 to form a fan-shaped support frame. A rubber pad 56 is bonded to the outer surface of the contact plate 55 .

[0028] It should be noted that: in the auxiliary support member 5, the second positioning rod 51 can be inserted into the slide 47 and then fixed to the connecting plate 45 by the third nut 52. The second positioning rod 51 is provided with a ring seat 53. The support arm 54 on the ring seat 53 cooperates with the contact plate 55 to form a fan-shaped frame structure. The contact plate 55 can directly contact objects outside the cable (such as walls, etc.), thereby supporting the entire device and preventing the sleeve, elastic extrusion component 3 and locking component 4 from contacting objects outside the cable, which can further enhance the protection effect. A rubber pad 56 is provided on the outer surface of the contact plate 55. The rubber pad 56 is low in cost and has good wear resistance. It is easy to replace when damaged. Because the second positioning rod 51 can correspond to any position of the slide 47, the installation position of the entire auxiliary support 5 itself can be adjusted, and its usage quantity can also be adjusted. That is, if there is a wall only on one side of the cable, the number of auxiliary supports 5 can be reduced.

[0029] The above are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A combined pressure-resistant flame-retardant power cable sheath pipe structure, comprising two straight pipe sections (1) and a corrugated pipe section (2), wherein the corrugated pipe (2) is located between the two straight pipe sections (1) and is fixed by a flange, and is characterized in that: The straight tube (1) and the corrugated tube (2) are respectively composed of two first half tubes (11) and two second half tubes (21), and the contact surfaces of the two first half tubes (11) and the contact surfaces of the two second half tubes (21) are perpendicular to each other; A set of elastic extrusion components (3) is fixed on each of the first half pipes (11), and the two sets of elastic extrusion components (3) are symmetrically arranged to fix the cables passing through the straight pipe (1) by clamping; A locking assembly (4) is also fixed to the outside of the straight tube (1) via an elastic extrusion assembly (3), the locking assembly (4) comprising two sets of base frames, the two sets of base frames being symmetrically fixed to the two first half tubes (11), an arc-shaped connecting plate (45) being fixed between the two sets of base frames, the base frames and the connecting plate (45) forming an annular outer frame for locking the two first half tubes (11); A plurality of auxiliary support members (5) are also fixed on the connecting plate (45), and the auxiliary support members (5) include a contact plate (55), and the distance between the contact plate (55) and the straight tube (1) is greater than the distance between the connecting plate (45) and the straight tube (1).

2. The combined pressure-resistant flame-retardant power cable sheath structure according to claim 1, characterized in that: The top end of the first half-tube (11) has an integrally connected rectangular shell (12), the shell (12) protruding from the outer wall of the first half-tube (11), the interior of which has a content space communicating with the straight tube (1), and the shell (12) has a through hole penetrating the inside and outside of the first half-tube (11); The side ends of the two first half-tubes (11) both have a tooth plate (13) and a tooth groove for the tooth plate (13) to be inserted, wherein the tooth plate (13) on one of the first half-tubes (11) has an embedding groove (14), and the tooth plate (13) on the other first half-tube (11) has a fillet (15) embedded in the embedding groove (14).

3. The combined pressure-resistant flame-retardant power cable sheath structure according to claim 1, characterized in that: The elastic extrusion assembly (3) includes a mounting cylinder (31), the mounting cylinder (31) has a sliding cavity inside and a thread outside, the mounting cylinder (31) is plugged into the shell (12) along the insertion hole, so that one end is located inside the straight tube (1) and the other end is located outside the straight tube (1), and a baffle (32) is welded to the outer circumferential wall of the mounting cylinder (31) and pressed against the inner wall of the shell (12); A sliding rod (33) is slidably connected in the sliding cavity inside the mounting tube (31), one end of the sliding rod (33) passes through the mounting tube (31) and is welded and fixed to a mounting seat (35) located inside the straight tube (1), and a spring (34) is also sleeved on the sliding rod (33) to press against the mounting seat (35) and the baffle (32), and two elastic metal sheets (36) for squeezing and positioning the cable are fixed to the lower end of the mounting seat (35) with bolts.

4. The combined pressure-resistant flame-retardant power cable sheath structure according to claim 3, characterized in that: The two elastic metal sheets (36) are distributed in a V-shape, and the elastic metal sheets (36) are in an arc shape from the center to both ends facing the inner wall of the first half tube (11).

5. The combined pressure-resistant flame-retardant power cable sheath structure according to claim 3, characterized in that: The volume of the content space inside the shell (12) is greater than the volume of the mounting seat (35), so that the mounting seat (35) can completely enter the content space, and the elastic metal sheet (36) fits the inner wall of the first half tube (11).

6. The combined pressure-resistant flame-retardant power cable sheath structure according to claim 1, characterized in that: The base frame includes a sleeve (41), the sleeve (41) is sleeved on the mounting cylinder (31), and two sets of symmetrically arranged fixing frames (42) are welded and fixed on the circumferential outer wall of the sleeve (41), a positioning plate (43) is welded and fixed on the other end of the fixing frame (42), and two symmetrically arranged first positioning rods (44) are welded and fixed on the other side of the positioning plate (43), and the circumferential outer wall of the first positioning rod (44) has a thread; The connecting plate (45) is arc-shaped, has holes at both ends, and is sleeved on first positioning rods (44) symmetrically positioned in the two sets of base frames. The first positioning rods (44) are also threadedly connected to second nuts (46) for locking the connecting plate (45). The connecting plate (45) also has an arc-shaped slideway (47).

7. The combined pressure-resistant flame-retardant power cable sheath structure according to claim 6, characterized in that: The mounting cylinder (31) is also threadedly connected to a locking sleeve (41) and a first nut (37) is used to fix the mounting cylinder (31) to the housing (12).

8. The combined pressure-resistant flame-retardant power cable sheath structure according to claim 1, characterized in that: The auxiliary support member (5) further includes a second positioning rod (51), which is inserted into the connecting plate (45) along the slideway (47) and fixed by a third nut (52). A ring seat (53) is sleeved and fixed on the second positioning rod (51), and two support arms (54) arranged in a V shape are welded and fixed to the outer wall of the circumference of the ring seat (53). The contact plate (55) is welded and fixed to the two support arms (54) to form a fan-shaped support frame.

9. The combined pressure-resistant flame-retardant power cable sheath structure according to claim 8, characterized in that: A rubber pad (56) is also bonded to the outer surface of the resistance plate (55).

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