Mpp cable protection pipe structure

Abstract

This invention relates to the field of cable protection pipe technology, and discloses an MPP cable protection pipe structure, comprising: at least two protection pipe units, a locking connecting sleeve, an elastic locking component, a first guide slope, and a sliding unlocking sleeve. The protection pipe units are connected end-to-end to form a cable passage channel. A locking connecting sleeve is provided between two adjacent protection pipe units, and the locking connecting sleeve is coaxially and slidably sleeved with the protection pipe unit to connect the two adjacent protection pipe units. The locking connecting sleeve has a limiting locking groove. The mating end of the protection pipe unit is provided with a radially expandable elastic locking component, which can be fitted into the limiting locking groove during the sleeve connection action. The first guide slope on the elastic locking component is exposed through the groove on the outer circumference of the limiting locking groove during the fitting action. A sliding unlocking sleeve is slidably sleeved on the outer circumference of the locking connecting sleeve, and the unlocking force application part on its inner wall can slide against the first guide slope, driving the elastic locking component to retract and disengage from the limiting locking groove. This improves the convenience of disassembly operations.

Description

Technical Field

[0001] This invention relates to the field of cable protection pipe technology, and in particular to an MPP cable protection pipe structure. Background Technology

[0002] MPP cable protection pipe structure is a pipe structure specifically designed for the underground protection of power cables, including medium and low voltage power transmission and distribution cables, communication optical cables, electrical control lines, etc.

[0003] Chinese utility model CN217769376U discloses an MPP cable protection pipe with a locking structure. It uses a split locking sleeve at the pipe body joint, a positioning component to limit the connection between the locking sleeve and the pipe body, and then pushes a fixing block along the guide groove between the upper and lower fixing sleeves, causing the fixing buckle to engage with the fixing slot to lock the sleeve. However, when disassembling and maintaining the pipe body after docking, it is necessary to first use a tool to pry the fixing block to deform the fixing buckle and disengage it from the fixing slot before the fixing block can be pulled out of the guide groove. Then, the upper and lower fixing sleeves must be pried apart to completely remove the limiting block from the positioning through hole and limiting ring groove of the pipe body before the two docked pipe bodies can be separated. The overall disassembly operation is not convenient. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, the purpose of this invention is to provide an MPP cable protection pipe structure that improves the convenience of disassembly.

[0005] The objective of this invention is achieved through the following technical solution:

[0006] An MPP cable protection pipe structure, comprising:

[0007] At least two protective pipe units are connected end to end to form a cable passage;

[0008] A locking connecting sleeve is provided between two adjacent protective tube units, and the two ends of the locking connecting sleeve are respectively coaxially and slidably sleeved with the docking end of the corresponding protective tube unit. The locking connecting sleeve is used to connect two adjacent protective tube units.

[0009] The locking connecting sleeve has a limiting locking groove at the docking end corresponding to the protective tube unit. The two openings of the limiting locking groove are located on the inner wall of the locking connecting sleeve and the outer peripheral surface of the locking connecting sleeve, respectively.

[0010] An elastic locking assembly is provided at the docking end of the protective tube unit and can extend and retract radially along the protective tube unit; the elastic locking assembly is fitted into the corresponding limiting locking groove as the protective tube unit and the locking connecting sleeve are engaged.

[0011] A first guide slope is disposed on the elastic locking assembly and moves synchronously with the elastic locking assembly; the first guide slope protrudes from the outer peripheral surface of the locking connecting sleeve through the slot of the limiting locking groove located on the outer peripheral surface of the locking connecting sleeve as the elastic locking assembly engages with the limiting locking groove.

[0012] A sliding unlocking sleeve is slidably fitted onto the outer peripheral surface of the locking connecting sleeve; the inner wall of the sliding unlocking sleeve forms an unlocking force application part, which gradually abuts against the first guide slope as the sliding unlocking sleeve slides, driving the elastic locking component to contract, so that the elastic locking component disengages from the limiting locking groove.

[0013] Furthermore, the outer peripheral surface of the docking end of the protective tube unit is provided with a plurality of guide mounting grooves, which extend radially along the protective tube unit and are spaced apart circumferentially along the protective tube unit.

[0014] The elastic locking assembly is provided in multiple sets, and each set of elastic locking assemblies is installed in the corresponding guide mounting groove;

[0015] The limiting locking groove is provided in multiple ways, and each limiting locking groove is used to cooperate with the corresponding elastic locking component.

[0016] Furthermore, the plurality of the guide mounting grooves are arranged at equal intervals along the circumference of the protective tube unit;

[0017] The elastic locking assembly includes a locking actuator and an elastic drive member. The locking actuator slides in conjunction with the inner wall of the guide mounting groove. The connecting end of the elastic drive member is fitted to the inner wall of the bottom of the guide mounting groove, and the force-applying end of the elastic drive member is fitted to the locking actuator. The elastic drive member is used to provide the locking actuator with an elastic driving force in a radially outward direction.

[0018] Furthermore, a limiting anti-detachment groove is formed on the inner sidewall of the guide mounting groove, and the limiting anti-detachment groove extends along the depth direction of the guide mounting groove;

[0019] The locking actuator is provided with a limiting anti-detachment protrusion, which is embedded in the limiting anti-detachment groove. The limiting anti-detachment protrusion is used to limit the maximum extension stroke of the locking actuator.

[0020] Furthermore, the locking actuator is provided with a second guide slope on the side facing the locking connecting sleeve. The second guide slope abuts against the end of the locking connecting sleeve as the protective tube unit and the locking connecting sleeve are engaged, driving the locking actuator to retract radially along the guide mounting groove. As the protective tube unit and the locking connecting sleeve are engaged, the locking actuator springs back and fits into the limiting locking groove.

[0021] Furthermore, both ends of the locking connecting sleeve are provided with clearance guide grooves, which extend along the axial direction of the locking connecting sleeve and communicate with the corresponding end of the limiting locking groove.

[0022] The sidewall of the first guide ramp slides in conjunction with the inner wall of the avoidance guide groove, which provides axial guidance and avoidance space for the first guide ramp to enter and exit the limiting locking groove.

[0023] Furthermore, the inner wall of the locking connecting sleeve is provided with a sealing ring, and the two ends of the sealing ring along its own axial direction respectively abut against the mating end faces of the two adjacent protective tube units. The sealing ring is used to seal the mating gap between the protective tube unit and the locking connecting sleeve.

[0024] Furthermore, the inner wall of the sliding unlocking sleeve is provided with at least one positioning guide groove, which is provided through the axial direction of the sliding unlocking sleeve; the outer peripheral surface of the locking connecting sleeve is provided with a positioning guide protrusion that matches the positioning guide groove, which extends along the axial direction of the locking connecting sleeve and slides in cooperation with the positioning guide groove.

[0025] The top of the positioning guide protrusion is provided with multiple engaging positioning teeth, which are spaced apart along the axial direction of the positioning guide protrusion.

[0026] The inner wall of the positioning guide groove is provided with an elastic latch, which can engage with each of the engagement positioning teeth in turn as the sliding unlocking sleeve slides.

[0027] Furthermore, the MPP cable protection pipe structure also includes a protective sleeve, which is detachably sleeved on the outside of the sliding unlocking sleeve. The protective sleeve is used to prevent the first guide slope from being accidentally touched by an external force, which could cause a false lock.

[0028] The outer circumferential surface of the protective sleeve is provided with multiple anti-slip force-applying grooves, which are spaced apart along the axial direction of the protective sleeve.

[0029] Furthermore, the outer peripheral surface of the sliding unlocking sleeve is provided with a support base, and the top of the support base is provided with a fastener assembly hole;

[0030] The outer circumferential surface of the protective sleeve is provided with a fastener through hole, the inner wall of the protective sleeve is supported by the top of the support base, and the fastener through hole is connected to the fastener assembly hole.

[0031] The MPP cable protection pipe structure also includes threaded fasteners, which are inserted through the fastener through hole and threadedly engaged with the fastener mounting hole.

[0032] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0033] The cable laying channel is formed by connecting the end of the protective tube unit; thus providing a continuous and smooth protective space for the cable, avoiding scratches and jamming during the cable laying process, and ensuring the integrity and safety of the cable laying.

[0034] The locking connection sleeve is sleeved between two adjacent protective tube units, and both ends of the locking connection sleeve are coaxially and slidably sleeved with the mating ends of the corresponding protective tube units. The locking connection sleeve is used to connect two adjacent protective tube units. A limiting locking groove is formed on the locking connection sleeve corresponding to the mating end of the protective tube unit, with the two openings of the limiting locking groove located on the inner wall and outer circumferential surface of the locking connection sleeve, respectively. An elastic locking component is disposed at the mating end of the protective tube unit and can extend and retract radially along the protective tube unit. The elastic locking component engages with the corresponding limiting locking groove as the protective tube unit and the locking connection sleeve are sleeved together. The locking sleeve with coaxial sliding connection enables precise docking and stable connection of adjacent protective tube units, ensuring the coaxiality of the docking. The limiting locking groove with internal and external double slots provides a reliable locking limit position for the elastic locking component, ensuring the connection strength and pull-out resistance after the protective tube units are docked. The radially expandable elastic locking component enables adaptive positional adaptation during the docking process of the protective tube units. It can automatically complete the fitting and locking with the sleeve action without the need for manual adjustment of the locking component position. It does not require additional fasteners, welding or other auxiliary fixing processes, shortening the construction time of the protective tube unit splicing. At the same time, it provides a resettable action basis for subsequent unlocking and disassembly without force or special tools.

[0035] Based on the first guide slope being disposed on the elastic locking component and moving synchronously with the elastic locking component; the first guide slope protrudes from the outer circumference of the locking connecting sleeve through the slot of the limiting locking groove as the elastic locking component engages with the limiting locking groove; thus, through the first guide slope that moves synchronously with the elastic locking component, a stable unlocking force transmission and conversion structure is constructed. When the protective tube unit completes locking, the first guide slope is automatically exposed on the outer circumference of the locking connecting sleeve, directly forming an unlocking force application point without additional drilling or disassembly operations, avoiding the cumbersome operation of finding the internal locking point and prying the concealed locking structure when disassembling traditional pipelines.

[0036] The sliding unlocking sleeve is slidably fitted onto the outer circumferential surface of the locking connecting sleeve; the inner wall of the sliding unlocking sleeve forms an unlocking force application part, which gradually abuts against the first guide slope as the sliding unlocking sleeve slides, driving the elastic locking component to contract, so that the elastic locking component disengages from the limiting locking groove; thus, the sliding unlocking sleeve fitted onto the outer circumferential surface provides the operator with an integrated one-handed operating component, eliminating the need for specialized construction tools such as wrenches and pry bars, and unlocking can be completed with a simple axial sliding action, making it particularly suitable for underground pipe networks. In confined construction scenarios such as cable wells, the environmental limitations and technical barriers to disassembly operations are reduced. By engaging the unlocking force application part with the first guide slope, the axial sliding thrust is efficiently converted into a force that drives the radial contraction of the elastic locking component, thus releasing the locking state in a convenient and labor-saving manner. This eliminates the inefficient operation of violent prying and cutting during the disassembly of traditional MPP cable protection pipes, enabling rapid unlocking of the protection pipe unit and improving the convenience of disassembly operations. At the same time, the disassembly process does not cause any damage to the protection pipe unit, improving the reusability of the protection pipe unit and the efficiency of secondary construction. Attached Figure Description

[0037] Figure 1 This is a three-dimensional structural diagram of an MPP cable protection pipe structure according to the present invention;

[0038] Figure 2 This is a three-dimensional structural diagram of an MPP cable protection pipe structure according to the present invention, wherein the protective sleeve is in a disassembled state;

[0039] Figure 3 for Figure 1 Assembly diagram of the central protective tube unit, locking connecting sleeve, elastic locking assembly and sliding unlocking sleeve;

[0040] Figure 4 for Figure 3 A magnified view of a portion of point A in the middle.

[0041] In the diagram: 1. Protective pipe unit; 11. Cable passageway; 12. Guide mounting groove; 121. Limiting anti-detachment groove; 2. Locking connecting sleeve; 21. Limiting locking groove; 22. Avoidance guide groove; 23. Sealing ring; 24. Positioning guide protrusion; 241. Engaging positioning tooth; 3. Elastic locking assembly; 31. Locking actuator; 311. Limiting anti-detachment protrusion; 312. Second guide slope; 32. Elastic drive component; 4. First guide slope; 5. Sliding unlocking sleeve; 51. Unlocking force application part; 52. Positioning guide groove; 521. Elastic latch; 53. Support base; 531. Fastener assembly hole; 6. Protective sleeve; 61. Anti-slip force application groove; 62. Fastener through hole; 7. Threaded fastener. Detailed Implementation

[0042] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0043] It should be noted that when an element is described as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is described as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations.

[0044] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0045] See Figure 1 , Figure 3 The specific implementation of a preferred embodiment of the present invention is as follows: An MPP cable protection pipe structure includes: at least two protection pipe units 1, a locking connecting sleeve 2, an elastic locking component 3, a first guide slope 4, and a sliding unlocking sleeve 5.

[0046] The protective pipe unit 1 is connected end to end to form a cable passage 11;

[0047] The locking connecting sleeve 2 is disposed between two adjacent protective tube units 1, and the two ends of the locking connecting sleeve 2 are respectively coaxially and slidably sleeved with the docking end of the corresponding protective tube unit 1. The locking connecting sleeve 2 is used to connect two adjacent protective tube units 1.

[0048] The locking connecting sleeve 2 has a limiting locking groove 21 at the docking end corresponding to the protective tube unit 1. The two openings of the limiting locking groove 21 are located on the inner wall of the locking connecting sleeve 2 and the outer peripheral surface of the locking connecting sleeve 2, respectively.

[0049] The elastic locking component 3 is disposed at the docking end of the protective tube unit 1 and can extend and retract radially along the protective tube unit 1; the elastic locking component 3 is fitted into the corresponding limiting locking groove 21 as the protective tube unit 1 and the locking connecting sleeve 2 are engaged.

[0050] The first guide slope 4 is disposed on the elastic locking component 3 and moves synchronously with the elastic locking component 3; the first guide slope 4 protrudes from the outer peripheral surface of the locking connecting sleeve 2 through the slot of the limiting locking groove 21 located on the outer peripheral surface of the locking connecting sleeve 2 as the elastic locking component 3 and the limiting locking groove 21 engage.

[0051] The sliding unlocking sleeve 5 is slidably fitted onto the outer peripheral surface of the locking connecting sleeve 2; the inner wall of the sliding unlocking sleeve 5 forms an unlocking force application part 51, which gradually abuts against the first guide inclined surface 4 as the sliding unlocking sleeve 5 slides, driving the elastic locking component 3 to contract, so that the elastic locking component 3 disengages from the limiting locking groove 21.

[0052] During installation, first, the sliding unlocking sleeve 5 is coaxially fitted onto the outer circumferential surface of the locking connecting sleeve 2, so that the sliding unlocking sleeve 5 is initially located in the axial middle section of the locking connecting sleeve 2, and will not obstruct or hinder the limiting locking grooves 21 at both ends of the locking connecting sleeve 2 and the subsequent extension of the first guide slope 4; then, the docking ends of the two protective tube units 1 to be docked are coaxially aligned, one end of the locking connecting sleeve 2 is aligned with the docking end of the first protective tube unit 1, and the locking connecting sleeve 2 is pushed axially to make the locking connecting sleeve 2 and the protective tube unit 1 slide together coaxially; during the fitting process, the elastic locking component 3 at the docking end of the protective tube unit 1 is abutted by the end of the locking connecting sleeve 2, and moves along the protective tube unit 1 Radial contraction; after the locking connecting sleeve 2 is fitted into place, the elastic locking component 3 rebounds and fits into the limiting locking groove 21 at the corresponding position of the locking connecting sleeve 2; at the same time as the elastic locking component 3 is fitted into place, its end first guide slope 4 passes through the limiting locking groove 21 and is located at the groove on the outer peripheral surface of the locking connecting sleeve 2, protruding from the outer peripheral surface of the locking connecting sleeve 2; then align the other end of the locking connecting sleeve 2 with the docking end of the second protective pipe unit 1 to be docked, and repeat the above axial pushing sleeve operation so that the two protective pipe units 1 are docked and connected through the locking connecting sleeve 2; multiple sets of protective pipe units 1 are connected end to end in this operation to form a continuous cable passage 11.

[0053] During disassembly, the operator does not need to use wrenches, pry bars or other auxiliary tools. By holding the sliding unlock sleeve 5 with one hand and sliding it axially towards both ends of the locking connecting sleeve 2, the protective tube units 1 at both ends can be unlocked respectively. During the sliding process of the sliding unlock sleeve 5, the unlocking force application part 51 on its inner wall gradually abuts and applies force along the protruding first guide slope 4, driving the elastic locking component 3 to contract radially, so that the elastic locking component 3 disengages from the limiting locking groove 21. At this time, by pulling the protective tube unit 1 axially, the protective tube unit 1 can be separated from the locking connecting sleeve 2, and the disassembly of a single protective tube unit 1 can be completed. If it is necessary to disassemble multiple protective tube units 1, the above operation of pushing the sliding unlock sleeve 5 and pulling the protective tube unit 1 can be repeated.

[0054] Obviously, the cable laying channel 11 is formed by connecting the end of the protective tube unit 1, thus providing a continuous and smooth protective space for the cable, avoiding scratches and jamming during cable laying, and ensuring the integrity and safety of cable laying. The locking connecting sleeve 2 is located between two adjacent protective tube units 1, and both ends of the locking connecting sleeve 2 are coaxially and slidably sleeved with the docking ends of the corresponding protective tube unit 1. The locking connecting sleeve 2 is used to connect two adjacent protective tube units 1. A limiting locking groove 21 is formed on the docking end of the locking connecting sleeve 2 corresponding to the protective tube unit 1. The two openings of the limiting locking groove 21 are located on the inner wall of the locking connecting sleeve 2 and the locking connecting sleeve 2. The outer peripheral surface; the elastic locking component 3 is located at the docking end of the protective tube unit 1 and can extend and retract radially along the protective tube unit 1; the elastic locking component 3 is fitted into the corresponding limiting locking groove 21 as the protective tube unit 1 and the locking connecting sleeve 2 are engaged; thus, the coaxial sliding locking connecting sleeve 2 achieves precise docking and stable connection between adjacent protective tube units 1, ensuring the coaxiality of the docking of the protective tube units 1; the limiting locking groove 21 with internal and external double slots provides a reliable locking limiting point for the elastic locking component 3, ensuring the connection strength and pull-out resistance of the protective tube units 1 after docking; the radially extendable elastic locking component 3 realizes the self-locking mechanism during the docking process of the protective tube units 1. Adaptable to different positions, the locking components can be automatically engaged and locked without manual adjustment. No additional fasteners or welding are required, shortening the assembly time of the protective tube unit 1. This also provides a repositionable basis for subsequent unlocking and disassembly without force or special tools. The first guide slope 4 is located on the elastic locking component 3 and moves synchronously with it. As the elastic locking component 3 engages with the limiting locking groove 21, the first guide slope 4 protrudes from the outer circumference of the locking connecting sleeve 2 through the groove in the limiting locking groove 21. Thus, the first guide slope 4, synchronized with the elastic locking component 3, allows for automatic locking. Surface 4 constructs a stable unlocking force transmission and conversion structure. When the protective tube unit 1 is locked, the first guide slope 4 is automatically exposed on the outer peripheral surface of the locking connecting sleeve 2. The unlocking force application point can be directly formed without additional drilling or disassembly operations, avoiding the tedious operation of finding the internal locking point and prying the hidden locking structure when disassembling traditional pipelines. The sliding unlocking sleeve 5 is slidably fitted onto the outer peripheral surface of the locking connecting sleeve 2. The inner wall of the sliding unlocking sleeve 5 forms an unlocking force application part 51. The unlocking force application part 51 gradually abuts against the first guide slope 4 as the sliding unlocking sleeve 5 slides, driving the elastic locking component 3 to contract, so that the elastic locking component 3 disengages from the limiting locking groove 21.Thus, the sliding unlocking sleeve 5, fitted onto the outer periphery, provides operators with an integrated, one-handed operating component. Unlocking can be completed with a simple axial sliding motion, eliminating the need for specialized tools such as wrenches or pry bars. This is particularly suitable for confined construction scenarios such as underground pipe networks and cable wells, reducing environmental limitations and technical barriers to disassembly. Through the contact between the unlocking force application part 51 and the first guide inclined surface 4, the axial sliding thrust is efficiently converted into a radial contraction force driving the elastic locking component 3, releasing the locking state in a convenient and effortless manner. This eliminates the inefficient operation of violent prying and cutting during traditional MPP cable protection pipe disassembly, achieving one-click quick unlocking of the protection pipe unit 1, improving the convenience of disassembly. Simultaneously, the disassembly process does not cause any damage to the protection pipe unit 1, enhancing its reusability and secondary construction efficiency.

[0055] See Figures 1-4 In this embodiment, in order to more effectively improve the convenience of disassembly operation, preferably, a plurality of guide mounting grooves 12 are provided on the outer peripheral surface of the docking end of the protective tube unit 1. The guide mounting grooves 12 extend radially along the protective tube unit 1 and are arranged at intervals along the circumference of the protective tube unit 1.

[0056] The elastic locking component 3 is provided in multiple sets, and each set of the elastic locking component 3 is installed in the corresponding guide mounting groove 12;

[0057] The limiting locking groove 21 is provided in multiple ways, and each limiting locking groove 21 is used to cooperate with the corresponding elastic locking component 3.

[0058] By using multiple sets of circumferentially spaced elastic locking components 3 and corresponding limiting locking grooves 21 for multi-point locking, the circumferential force uniformity after the protective pipe unit 1 and the locking connecting sleeve 2 are connected is improved, avoiding stress concentration and locking failure problems that occur with single-point locking. This enhances the pull-out resistance and torsion resistance of the protective pipe unit 1 after connection, making it suitable for complex working conditions such as soil settlement and external dragging during buried laying. At the same time, the guide installation groove 12 provides independent and stable installation and movement space for each set of elastic locking components 3, avoiding mutual interference when multiple sets of elastic locking components 3 move, ensuring the synchronicity of the extension and engagement movements of each set of elastic locking components 3, further improving the reliability of locking and unlocking operations, and ensuring smooth and controllable disassembly operations throughout the process.

[0059] Furthermore, the plurality of the guide mounting grooves 12 are arranged at equal intervals along the circumference of the protective tube unit 1;

[0060] The elastic locking assembly 3 includes a locking actuator 31 and an elastic drive member 32. The locking actuator 31 is slidably engaged with the inner wall of the guide mounting groove 12. The connecting end of the elastic drive member 32 is fitted to the inner wall of the bottom of the guide mounting groove 12, and the force-applying end of the elastic drive member 32 is fitted to the locking actuator 31. The elastic drive member 32 is used to provide the locking actuator 31 with an elastic driving force in a radially outward direction.

[0061] The evenly spaced guide mounting grooves 12 further enhance the circumferential force balance of the locking actuator 31 of the multiple sets of elastic locking components 3. The coaxiality at the docking point between the protective tube unit 1 and the locking connecting sleeve 2 is higher during locking, avoiding leakage of the protective tube unit 1 and cable jamming caused by docking misalignment. The sliding cooperation between the locking actuator 31 and the guide mounting grooves 12 provides guide limit for the radial extension and retraction of the locking actuator 31, avoiding swaying and jamming during the extension and retraction of the locking actuator 31, and ensuring the smoothness of locking and unlocking actions. The independently set elastic drive component 32 provides a continuous and stable elastic drive force for the locking actuator 31, which not only ensures that the locking actuator 31 can quickly rebound and lock after being sleeved, but also provides a stable reset base for the locking actuator 31 during unlocking. Locking and unlocking operations can be repeated without manual reset, improving the convenience of disassembly and assembly and the reusability of the protective tube unit 1.

[0062] The elastic drive element 32 is preferably a cylindrical compression spring, and the central axis of the cylindrical compression spring is coaxial with the depth direction of the guide mounting groove 12.

[0063] Furthermore, a limiting anti-detachment groove 121 is formed on the inner sidewall of the guide mounting groove 12, and the limiting anti-detachment groove 121 extends along the depth direction of the guide mounting groove 12.

[0064] The locking actuator 31 is provided with a limiting anti-detachment protrusion 311, which is embedded in the limiting anti-detachment groove 121. The limiting anti-detachment protrusion 311 is used to limit the maximum extension stroke of the locking actuator 31.

[0065] By limiting the engagement of the anti-detachment protrusion 311 and the anti-detachment groove 121, the maximum radial extension stroke of the locking actuator 31 is structurally restricted, avoiding the problem that the locking actuator 31 will dislodge from the guide mounting groove 12 due to excessive elastic force of the elastic drive member 32, thus ensuring the stability of the telescopic movement of the elastic locking assembly 3. In addition, the anti-detachment protrusion 311 can also control the extension amount of the locking actuator 31, ensuring that the exposed height of the first guide slope 4 is always in the optimal range for applying force to the sliding unlocking sleeve 5, avoiding the problem of unlocking force failure caused by insufficient exposure of the slope, and ensuring the reliability of the unlocking operation.

[0066] Furthermore, the locking actuator 31 is provided with a second guide slope 312 on the side facing the locking connecting sleeve 2. The second guide slope 312 abuts against the end of the locking connecting sleeve 2 as the protective tube unit 1 and the locking connecting sleeve 2 are engaged, driving the locking actuator 31 to retract radially along the guide mounting groove 12. The locking actuator 31 springs back and fits into the limiting locking groove 21 as the protective tube unit 1 and the locking connecting sleeve 2 are engaged.

[0067] By designing the second guide slope 312, the axial sleeve thrust of the protective tube unit 1 and the locking connecting sleeve 2 is automatically converted into a force that drives the locking actuator 31 to retract radially. The sleeve operation can be completed without manually pressing the locking actuator 31 of the elastic locking component 3, which simplifies the splicing process of the protective tube unit 1 and shortens the on-site construction time. At the same time, after the sleeve is in place, the locking actuator 31 can automatically spring back and lock, without the need for additional manual locking operation, realizing quick splicing with one push and locking, further improving the convenience of disassembling and assembling the protective tube unit 1.

[0068] Furthermore, both ends of the locking connecting sleeve 2 are provided with clearance guide grooves 22, which extend along the axial direction of the locking connecting sleeve 2 and communicate with the corresponding end of the limiting locking groove 21.

[0069] The sidewall of the first guide ramp 4 slides in conjunction with the inner wall of the avoidance guide groove 22, and the avoidance guide groove 22 is used to provide axial guidance and avoidance space for the first guide ramp 4 to enter and exit the limiting locking groove 21.

[0070] The axial guiding design of the avoidance guide groove 22 provides a limiting guide for the axial movement of the first guide slope 4, ensuring that the first guide slope 4 can effectively align with the limiting locking groove 21 during the sleeve connection of the protective tube unit 1 and the locking connecting sleeve 2. This avoids the problem of locking failure of the elastic locking component 3 caused by groove misalignment, thus improving the success rate of locking operation. At the same time, the avoidance guide groove 22 provides sufficient clearance space for the first guide slope 4, preventing collision between the first guide slope 4 and the inner wall of the locking connecting sleeve 2 during the sleeve connection process. This not only protects the structural integrity of the first guide slope 4 and ensures the stability of force transmission during subsequent unlocking, but also makes the sleeve connection smoother, eliminating the need for additional alignment operations and further improving the convenience of disassembly operation.

[0071] When the protective tube unit 1 is sleeved, the locking actuator 31 moves axially synchronously with the axial sleeved action of the protective tube unit 1 and the locking connecting sleeve 2. The first guide slope 4 on the locking actuator 31 first enters the clearance guide groove 22 on the end face of the locking connecting sleeve 2. The two side walls of the first guide slope 4 slide against the inner wall of the clearance guide groove 22 and move along the axial extension direction of the clearance guide groove 22, limiting the circumferential swing of the first guide slope 4 and the locking actuator 31. When the first guide slope 4 moves axially with the locking actuator 31 to the position aligned with the limiting locking groove 21, the locking actuator 31 rebounds radially outward under the action of the elastic drive member 32, driving the first guide slope 4 to move radially synchronously, so that the locking actuator 31 is fitted into the limiting locking groove 21 to complete the locking. 4. The locking sleeve 21 is inserted into the limiting locking groove 21 and extends out through the groove on the outer circumferential surface of the locking connecting sleeve 2. When the protective tube unit 1 is released, the unlocking force application part 51 of the sliding unlocking sleeve 5 abuts against the first guide slope 4, driving the first guide slope 4 to drive the locking execution part 31 to retract radially inward, so that the locking execution part 31 exits the limiting locking groove 21. The first guide slope 4 retracts back into the limiting locking groove 21, releasing the locking state. At this time, the protective tube unit 1 is pulled axially, and the locking execution part 31 drives the first guide slope 4 to move axially synchronously. The first guide slope 4 enters the avoidance guide groove 22 and slides out axially along the inner wall of the avoidance guide groove 22 without circumferential sway or jamming, until the locking execution part 31 is completely separated from the locking connecting sleeve 2 along with the protective tube unit 1.

[0072] Furthermore, the inner wall of the locking connecting sleeve 2 is provided with a sealing ring 23. The two ends of the sealing ring 23 along its own axial direction respectively abut against the mating end faces of the two adjacent protective tube units 1. The sealing ring 23 is used to seal the mating gap between the protective tube unit 1 and the locking connecting sleeve 2.

[0073] The sealing ring 23 provides a double seal by abutting its bidirectional end face, simultaneously blocking the gap between the locking sleeve 2 and the protective tube units 1 at both ends. This double seal prevents groundwater, silt, and corrosive substances from entering the protective tube unit 1 during underground installation, protecting the internally laid cables from corrosion and extending the service life of both the cables and the protective tube unit 1. Furthermore, the sealing ring 23's end face abutting design provides a rigid limit for the proper insertion of the protective tube unit 1. When the operator pushes the protective tube unit 1 until it is tightly abutted against the sealing ring 23, the insertion is considered complete, eliminating the need for additional measurement of the connection stroke and improving the convenience of on-site splicing. In addition, the sealing ring 23 provides a buffer and energy absorption effect when the protective tube unit 1 is subjected to axial vibration or impact, preventing hard collisions between the protective tube unit 1 and the locking sleeve 2, thus improving the long-term stability of the protective tube unit 1.

[0074] The sealing ring 23 is preferably a rubber sealing gasket, which is coaxially embedded in the inner wall of the locking connecting sleeve 2 and can be interference-fitted with the mating end face of the two protective tube units 1.

[0075] Furthermore, the inner wall of the sliding unlocking sleeve 5 is provided with at least one positioning guide groove 52, which is provided through the axial direction of the sliding unlocking sleeve 5; the outer peripheral surface of the locking connecting sleeve 2 is provided with a positioning guide protrusion 24 that matches the positioning guide groove 52, which extends along the axial direction of the locking connecting sleeve 2 and slides in cooperation with the positioning guide groove 52.

[0076] The top of the positioning guide protrusion 24 is provided with a plurality of engaging positioning teeth 241, and the plurality of engaging positioning teeth 241 are arranged at intervals along the axial direction of the positioning guide protrusion 24.

[0077] The inner wall of the positioning guide groove 52 is provided with an elastic latch 521. The elastic latch 521 can be engaged and positioned with each of the engagement positioning teeth 241 in turn as the sliding unlock sleeve 5 slides.

[0078] The sliding engagement of the positioning guide groove 52 and the positioning guide protrusion 24 provides circumferential limiting and axial guidance for the axial sliding of the sliding unlock sleeve 5, preventing circumferential deflection during the sliding process. This ensures that the unlocking force application part 51 on the inner wall of the sliding unlock sleeve 5 can effectively align with and abut against the first guide slope 4, avoiding unlocking failure caused by force misalignment. This ensures that the unlocking operation can be stably completed by pushing the sliding unlock sleeve 5 with one hand, improving the reliability and convenience of the disassembly operation. At the same time, the alternating engagement of the elastic latch 521 with the positioning teeth 241 at different positions allows the sliding unlock sleeve 5 to be locked at any position of the unlocking stroke. During disassembly, the operator does not need to continuously hold the sliding unlock sleeve 5 to maintain the unlocked state. The protective pipe unit 1 and the locking connecting sleeve 2 can be pulled apart with one hand, which is especially suitable for single-person disassembly operations in narrow spaces such as underground cable wells, further improving the convenience of disassembly operations. When the protective pipe unit 1 is in normal use and does not need to be disassembled, the elastic latch 521 can engage with the locking positioning tooth 241 in the middle position to stably lock the sliding unlocking sleeve 5 in the axial middle section of the locking connecting sleeve 2. This position will not interfere with the first guide inclined surface 4 at both ends, and can effectively limit the axial displacement of the sliding unlocking sleeve 5, avoiding the accidental sliding of the sliding unlocking sleeve 5 caused by unexpected external forces such as soil squeezing, foreign object impact, and backfill vibration, thus improving the locking stability and safety of the protective pipe unit 1 for long-term buried use.

[0079] Furthermore, the MPP cable protection pipe structure also includes a protective sleeve 6, which is detachably sleeved on the outside of the sliding unlocking sleeve 5. The protective sleeve 6 is used to prevent the first guide slope 4 from being accidentally touched by an external force, thus preventing misunderstanding lock.

[0080] The outer circumferential surface of the protective sleeve 6 is provided with multiple anti-slip force-applying grooves 61, which are spaced apart along the axial direction of the protective sleeve 6.

[0081] The protective sleeve 6 provides a completely enclosed protection for the sliding unlocking sleeve 5, the exposed first guide slope 4, and the sliding fit gap between the sliding unlocking sleeve 5 and the locking connecting sleeve 2. This not only prevents the sliding unlocking sleeve 5 from shifting or the first guide slope 4 from being deformed due to external impacts from soil and stones during the laying and backfilling of the protective pipe unit 1, but also isolates impurities such as mud and dust from entering the sliding fit gap, preventing problems such as jamming and unlocking failure of the sliding unlocking sleeve 5 caused by the accumulation of impurities. It also avoids accidental locking caused by unexpected external forces touching the sliding unlocking sleeve 5, thus improving the locking stability and unlocking smoothness of the protective pipe unit 1 during long-term underground use. Furthermore, it provides protection against... The anti-slip force-applying groove 61 on the outer circumference of the protective sleeve 6 increases the gripping area and gripping friction for the operator. The operator can directly grip the protective sleeve 6 to drive the sliding unlocking sleeve 5 to complete the axial sliding unlocking operation. Even in the narrow working conditions of underground cable wells that are wet and muddy, the force can be applied stably and the operation can be smooth without the need for additional anti-slip assistance, which improves the convenience of disassembly operation. In addition, the protective sleeve 6 adopts a detachable sleeve structure, which can be repeatedly disassembled and used to meet the multiple maintenance and disassembly needs of the protective pipe unit 1 throughout its entire life cycle. It can also be quickly replaced separately when the protective sleeve 6 ages or is damaged, without the need to replace the entire sliding unlocking assembly, which reduces the later maintenance cost and maintenance difficulty.

[0082] Furthermore, the outer peripheral surface of the sliding unlock sleeve 5 is provided with a support base 53, and the top of the support base 53 is provided with a fastener assembly hole 531;

[0083] The outer circumferential surface of the protective sleeve 6 is provided with a fastener through hole 62, the inner wall of the protective sleeve 6 is supported by the top of the support base 53, and the fastener through hole 62 is connected to the fastener assembly hole 531.

[0084] The MPP cable protection pipe structure also includes a threaded fastener 7, which passes through the fastener through hole 62 and is threadedly engaged with the fastener assembly hole 531.

[0085] The support base 53 provides stable support and limiting for the protective sleeve 6, ensuring that the protective sleeve 6 can be aligned with the sliding unlocking sleeve 5 after being sleeved, preventing circumferential deflection and axial displacement of the protective sleeve 6, and ensuring effective alignment between the fastener through hole 62 and the fastener assembly hole 531, thus improving the ease of installation of the protective sleeve 6. At the same time, the threaded fastener 7 securely locks the protective sleeve 6 and the sliding unlocking sleeve 5 into one unit, preventing the protective sleeve 6 from falling off during the transportation, laying, and backfilling of the protective pipe unit 1, which could lead to protective failure. In addition, during maintenance and replacement, the protective sleeve 6 can be quickly removed simply by unscrewing the threaded fastener 7, without the need for special tools. The operation is simple and convenient, and the threaded fastener 7 is reusable, adapting to the multiple maintenance and disassembly requirements of the protective pipe unit 1.

[0086] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of those different embodiments or examples.

[0087] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0088] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this application, and these should all be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An MPP cable protection pipe structure, characterized in that, include: At least two protective pipe units (1) are connected end to end to form a cable passage (11). Locking connecting sleeve (2), the locking connecting sleeve (2) is disposed between two adjacent protective tube units (1), and the two ends of the locking connecting sleeve (2) are respectively coaxially and slidably sleeved with the docking end of the corresponding protective tube unit (1). The locking connecting sleeve (2) is used to connect two adjacent protective tube units (1). The locking connecting sleeve (2) has a limiting locking groove (21) at the docking end of the protective tube unit (1). The two openings of the limiting locking groove (21) are located on the inner wall of the locking connecting sleeve (2) and the outer circumferential surface of the locking connecting sleeve (2), respectively. The elastic locking component (3) is located at the docking end of the protective tube unit (1) and can extend and retract radially along the protective tube unit (1); the elastic locking component (3) is fitted into the corresponding limiting locking groove (21) as the protective tube unit (1) and the locking connecting sleeve (2) are engaged. The first guide slope (4) is provided on the elastic locking component (3) and moves synchronously with the elastic locking component (3); the first guide slope (4) protrudes from the outer peripheral surface of the locking connecting sleeve (2) through the slot of the limiting locking groove (21) on the outer peripheral surface of the locking connecting sleeve (2) as the elastic locking component (3) and the limiting locking groove (21) engage. A sliding unlocking sleeve (5) is slidably fitted onto the outer circumferential surface of the locking connecting sleeve (2); the inner wall of the sliding unlocking sleeve (5) forms an unlocking force application part (51), which gradually abuts and applies force along the first guide slope (4) as the sliding unlocking sleeve (5) slides, driving the elastic locking component (3) to contract so that the elastic locking component (3) disengages from the limiting locking groove (21).

2. The MPP cable protection pipe structure according to claim 1, characterized in that, The outer circumferential surface of the docking end of the protective tube unit (1) is provided with a plurality of guide mounting grooves (12). The guide mounting grooves (12) extend radially along the protective tube unit (1) and are spaced apart circumferentially along the protective tube unit (1). The elastic locking component (3) is provided in multiple sets, and each set of the elastic locking component (3) is installed in the corresponding guide mounting groove (12); The limiting locking groove (21) is provided in multiple ways, and each limiting locking groove (21) is used to cooperate with the corresponding elastic locking component (3).

3. The MPP cable protection pipe structure according to claim 2, characterized in that, Multiple guide mounting slots (12) are arranged at equal intervals along the circumference of the protective tube unit (1); The elastic locking assembly (3) includes a locking actuator (31) and an elastic drive member (32). The locking actuator (31) slides in cooperation with the inner wall of the guide mounting groove (12). The connecting end of the elastic drive member (32) is fitted to the inner wall of the bottom of the guide mounting groove (12), and the force-applying end of the elastic drive member (32) is fitted to the locking actuator (31). The elastic drive member (32) is used to provide the locking actuator (31) with an elastic driving force in the radial direction outward.

4. The MPP cable protection pipe structure according to claim 3, characterized in that, The inner sidewall of the guide mounting groove (12) is provided with a limiting anti-detachment groove (121), which extends along the depth direction of the guide mounting groove (12). The locking actuator (31) is provided with a limiting anti-detachment protrusion (311), which is embedded in the limiting anti-detachment groove (121). The limiting anti-detachment protrusion (311) is used to limit the maximum extension stroke of the locking actuator (31).

5. The MPP cable protection pipe structure according to claim 3, characterized in that, The locking actuator (31) has a second guide slope (312) on the side facing the locking connecting sleeve (2). The second guide slope (312) abuts against the end of the locking connecting sleeve (2) as the protective tube unit (1) and the locking connecting sleeve (2) are engaged, driving the locking actuator (31) to retract radially along the guide mounting groove (12). The locking actuator (31) springs back into the limiting locking groove (21) as the protective tube unit (1) and the locking connecting sleeve (2) are engaged.

6. The MPP cable protection pipe structure according to claim 1, characterized in that, Both ends of the locking connecting sleeve (2) are provided with clearance guide grooves (22), which extend along the axial direction of the locking connecting sleeve (2) and are connected to the corresponding end of the limiting locking groove (21). The sidewall of the first guide ramp (4) slides in cooperation with the inner wall of the avoidance guide groove (22), and the avoidance guide groove (22) is used to provide axial guidance and avoidance space for the first guide ramp (4) to enter and exit the limiting locking groove (21).

7. The MPP cable protection pipe structure according to claim 1, characterized in that, The inner wall of the locking connecting sleeve (2) is provided with a sealing ring (23). The two ends of the sealing ring (23) along its own axial direction respectively abut against the mating end faces of the two adjacent protective tube units (1). The sealing ring (23) is used to seal the mating gap between the protective tube unit (1) and the locking connecting sleeve (2).

8. The MPP cable protection pipe structure according to claim 1, characterized in that, The inner wall of the sliding unlock sleeve (5) is provided with at least one positioning guide groove (52), which is provided through the axial direction of the sliding unlock sleeve (5); the outer peripheral surface of the locking connecting sleeve (2) is provided with a positioning guide protrusion (24) that matches the positioning guide groove (52), which extends along the axial direction of the locking connecting sleeve (2) and slides in cooperation with the positioning guide groove (52); The top of the positioning guide protrusion (24) is provided with a plurality of engaging positioning teeth (241), and the plurality of engaging positioning teeth (241) are spaced apart along the axial direction of the positioning guide protrusion (24). The inner wall of the positioning guide groove (52) is provided with an elastic latch (521). The elastic latch (521) can be engaged and positioned with each of the engagement positioning teeth (241) in turn as the sliding unlock sleeve (5) slides.

9. The MPP cable protection pipe structure according to claim 1, characterized in that, The MPP cable protection pipe structure also includes a protective sleeve (6), which is detachably sleeved on the outside of the sliding unlocking sleeve (5). The protective sleeve (6) is used to prevent the first guide slope (4) from being accidentally touched by an external force, which could cause a false lock. The outer circumferential surface of the protective sleeve (6) is provided with multiple anti-slip force grooves (61), and the multiple anti-slip force grooves (61) are arranged at intervals along the axial direction of the protective sleeve (6).

10. The MPP cable protection pipe structure according to claim 9, characterized in that, The outer periphery of the sliding unlock sleeve (5) is provided with a support base (53), and the top of the support base (53) is provided with a fastener assembly hole (531). The outer circumferential surface of the protective sleeve (6) is provided with a fastener through hole (62), the inner wall of the protective sleeve (6) is supported by the top of the support base (53), and the fastener through hole (62) is connected to the fastener assembly hole (531). The MPP cable protection pipe structure also includes a threaded fastener (7), which is inserted through the fastener through hole (62) and threadedly engaged with the fastener assembly hole (531).

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