Cable turning protection device

Abstract

The invention discloses a cable turning protection device, which comprises a pressure monitoring device, and is characterized in that the pressure monitoring device is arranged at the turning of a cable, is arranged on an auxiliary fixing support, is limited and fixed, and is electrically connected with a monitoring box; the auxiliary fixing support comprises a well mouth fixing limiting frame and a fixing rod under the horizontal application scene, and under the vertical turning well descending scene, the pressure monitoring device is arranged on the well mouth fixing limiting frame; and in the horizontal turning well descending scene, the pressure monitoring device is connected with the corresponding fixing rod in the horizontal application scene. The device is flexible and convenient to apply, can meet the bending radius requirements of cables with different diameters, can more accurately detect the stress condition of the cable at the turning position, does not need to additionally erect a bracket for fixing, and meets the limiting and fixing requirements of the pressure monitoring device at a lower well mouth and in a tunnel.

Description

Technical Field

[0001] The invention belongs to the technical field of cable protection, and in particular relates to a cable bend protection device. Background Art

[0002] With the rapid development of the national economy, the degree of cableization of urban power grids will become higher and higher, and the laying and operation and maintenance of high-voltage cables are facing tremendous pressure. During the laying process, cables are often subjected to lateral pressure at the bends. The magnitude of the lateral pressure is related to the traction and the turning radius of the cable. At the same time, due to the material and structural characteristics of the cable, the cable has a certain limit to the lateral pressure it can withstand. When the lateral pressure is too large, it will cause damage to the insulation layer and sheath, bringing major safety hazards to the operation of the cable line.

[0003] At present, in order to monitor the lateral pressure at the cable bend, a simple bracket is often set up based on experience to bend the cable; at the same time, there are also lateral pressure monitoring devices that adopt an overall force method, which cannot monitor the force conditions of the cable at each pulley.

[0004] Disadvantages of existing technical solutions: The empirical and theoretical analysis methods lack the ability to analyze and judge, and cannot know the real-time value of the lateral pressure on the cable during the cable laying process, and cannot grasp the on-site cable laying conditions; the existing lateral pressure devices on the market are relatively large in size, require external power supply, are not convenient for on-site installation and use, and have a single application scenario.

[0005] The existing method mainly relies on manual experience and the erection of simple brackets. This method is not only highly subjective, but also cannot accurately measure and record the real-time data of the lateral pressure on the cable when it turns. The lack of accurate monitoring data makes it difficult to detect potential insulation or sheath damage risks in a timely manner.

[0006] Some devices use overall force monitoring. Since it is impossible to refine the force conditions of each pulley or key turning point, the monitoring results are relatively general and cannot accurately reflect the force distribution of the cable in a complex path.

[0007] Existing side pressure monitoring devices on the market are often large in size and require an external power supply, which not only increases the complexity of on-site installation, but also limits its application flexibility in different environments and scenarios. Especially in cable laying sites where space is limited or frequent movement is required, the use of such devices is extremely inconvenient.

[0008] The bulky equipment and complex installation may also reduce construction efficiency and increase manpower and time costs.

[0009] Most existing solutions lack intelligent analysis and early warning functions. They are unable to automatically determine whether the cable is in a safe state based on the monitored data, nor can they issue alarms or take protective measures in time under abnormal circumstances.

[0010] The lack of intelligence is also reflected in the lag in data processing, which makes it impossible to quickly and accurately extract useful information from large amounts of monitoring data to provide strong support for decision-making.

[0011] The materials, specifications and laying environments of different cables vary greatly, and the requirements for side pressure monitoring are also different. Existing solutions often lack sufficient flexibility and scalability, and it is difficult to meet the diverse and complex monitoring needs.

[0012] As cable laying technology continues to advance and the scale of power grids continues to expand, the requirements for side pressure monitoring systems will continue to increase. Existing solutions may not be able to cope with future challenges. Summary of the invention

[0013] The technical problem to be solved by the present invention is to provide a cable bend protection device in view of the above-mentioned deficiencies in the prior art, so as to solve the technical problem that the lateral pressure on the bend during the cable laying process cannot be monitored in real time.

[0014] The present invention adopts the following technical solutions: A cable bend protection device, comprising a pressure monitoring device, which is arranged at the bend of the cable, and is arranged on an auxiliary fixing bracket to limit and fix the pressure monitoring device, and is electrically connected to a monitoring box; The auxiliary fixed bracket includes a wellhead fixed limit bracket and a fixed rod for horizontal application scenarios. In the vertical turning downhole scenario, the pressure monitoring device is set on the wellhead fixed limit bracket; in the horizontal turning downhole scenario, the pressure monitoring device is connected to the corresponding fixed rod for horizontal application scenarios.

[0015] Preferably, the pressure monitoring device includes a base frame, on which a force measuring pulley, a protection wheel, a data acquisition module and a transmission module are correspondingly installed, the lower side of the cable is in contact with the force measuring pulley, the inner side of the cable is in contact with the protection wheel, a force measuring sensor is arranged in the force measuring pulley, and the force measuring sensor is electrically connected to the monitoring box via the data acquisition module and the transmission module.

[0016] Preferably, the protection wheel is a position-limiting protection roller, and a bearing is arranged in the protection wheel.

[0017] Preferably, the base frame is arranged in an L shape, and the vertical section is provided with a vertical connecting block for connecting multiple pressure monitoring devices in a vertical turning downhole scenario, and the horizontal section is provided with a horizontal connecting block for connecting multiple pressure monitoring devices in a horizontal turning downhole scenario.

[0018] Preferably, in the vertical turning downhole scenario, multiple pressure monitoring devices are docked through vertical connecting blocks and connected by bolts; the pressure monitoring device is connected to the wellhead fixed limit frame by bolts, and the wellhead fixed limit frame is provided with a limit column and a bracket.

[0019] Preferably, in the horizontal turning downhole scenario, multiple pressure monitoring devices are docked and connected by bolts through horizontal connecting blocks set on the base frame, and the pressure monitoring devices are limited and fixed by a fixing rod in the horizontal application scenario. The front end of the fixing rod in the horizontal application scenario is provided with a bayonet for clamping on the base frame of the pressure monitoring device.

[0020] Preferably, in a horizontal application scenario, the front end length of the fixing rod is adjustable, and the lower end is used for support.

[0021] Preferably, the measurement and control box includes a sensor interface, and the pressure monitoring device is connected to the data acquisition unit via the sensor interface. The data acquisition unit is used to receive the pressure value detected by the pressure sensor.

[0022] Preferably, the data collection unit is connected to the communication unit via the alarm unit.

[0023] Preferably, the measurement and control box also includes a battery unit for powering the equipment; Display unit, used for displaying sensor data and setting parameters; A charging interface, used to charge the battery unit; Data export interface, used for exporting data.

[0024] Compared with the prior art, the present invention has at least the following beneficial effects: Accurate pressure monitoring: By placing a pressure monitoring device directly at the cable bend, the lateral pressure on the cable during the bend can be monitored in real time and accurately. This helps to promptly detect potential abnormal stress conditions and prevent damage to the insulation layer or sheath caused by excessive lateral pressure, thereby ensuring the safe operation of the cable line.

[0025] Flexible adaptability: The device design takes into account the application requirements in different scenarios, such as vertical turning and horizontal turning. Through the combined use of the wellhead fixed limit frame and the fixed rod in the horizontal application scenario, it can flexibly adapt to various cable turning scenarios, improving the versatility and practicality of the device.

[0026] Stable fixing method: The auxiliary fixing bracket not only provides a stable support for the pressure monitoring device, but also ensures the stability and accuracy of the monitoring device during the monitoring process through the limit design. This stable fixing method helps to reduce the monitoring error caused by external interference and improves the reliability of the monitoring data.

[0027] Convenient installation and maintenance: The electrical connection design between the pressure monitoring device and the monitoring box makes data transmission more convenient, and also facilitates daily maintenance and overhaul of the monitoring device. In addition, the modular design of the auxiliary fixing bracket makes the installation process simpler and faster, reducing the construction difficulty and cost.

[0028] Intelligent monitoring and management: Combined with intelligent analysis and early warning functions (although not directly mentioned in the original description, it can be used as a future upgrade direction), the device can further improve the intelligent management level of cable bends. Through real-time monitoring and data analysis, potential safety hazards can be discovered in time and corresponding preventive measures can be taken, improving the overall operation efficiency and safety of the cable line.

[0029] Improve construction efficiency and safety: The use of this protection device can reduce construction interruptions and repair work caused by cable damage, thereby improving construction efficiency. At the same time, by reducing the risk of cable damage, it also reduces the risk of safety accidents caused by cable failures and ensures the safety of construction workers.

[0030] In summary, the present invention can monitor the lateral pressure on the turning part during the cable laying process in real time, remind the construction personnel to deal with and adjust the laying plan in time, and send an alarm signal to the background, so as to effectively ensure the safety of cable laying.

[0031] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings to be used in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0033] Figure 1 This is a simplified structural diagram of the pressure monitoring device of the present invention; Figure 2 It is a schematic diagram of the use of the pressure monitoring device of the present invention in a vertical turning downhole scenario; Figure 3 It is a schematic diagram of the use of the pressure monitoring device of the present invention in a horizontal turning downhole scenario; Figure 4 This is a schematic diagram of the side pressure measurement and control box of the present invention; Figure 5 It is the cable force diagram; Figure 6 It is the force analysis diagram; Figure 7 This is the cable bending force diagram.

[0034] Among them: 1. Force measuring pulley; 2. Protection wheel; 3. Base frame; 301. Vertical connection block; 302. Horizontal connection block; 4. Force measuring sensor; 5. Data acquisition and transmission module; 6. Cable; 7. Pressure monitoring device; 8. Wellhead fixed limit frame; 9. Fixed rod for horizontal application scenario; 800. Monitoring box; 801. Sensor interface; 802. Battery unit; 803. Data acquisition unit; 804. Display unit; 805. Alarm unit; 806. Data export interface; 807. Communication unit; 808. Charging interface. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "one side", "one end", "one side" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, in the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0037] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] It should be understood that when used in this specification and the appended claims, the terms "include" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0039] It should also be understood that the terms used in the present specification are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the present specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0040] It should be further understood that the term "and / or" used in the present description and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0041] Various structural schematic diagrams of the embodiments disclosed in the present invention are shown in the accompanying drawings. These figures are not drawn to scale, and some details are magnified and some details may be omitted for the purpose of clear expression. The shapes of various regions and layers shown in the figures and the relative sizes and positional relationships therebetween are only exemplary, and may deviate in practice due to manufacturing tolerances or technical limitations, and those skilled in the art may additionally design regions / layers with different shapes, sizes, and relative positions according to actual needs.

[0042] The present invention provides a cable turning protection device, which adopts a pressure monitoring device in the form of a single structure, which can be used alone or in combination, and is flexible and convenient to use. It can meet the bending radius requirements of cables with different diameters, and more accurately detect the stress conditions of the cables at the turning points. Each module is battery-powered, and no external power cord is required, which is convenient for on-site use. It can realize pressure monitoring of 8 points on the cable at the same time, and each point independently measures and feedbacks data, real-time monitoring, and automatic output alarm when exceeding the limit, which greatly reduces the probability of cable damage. Through the designed auxiliary fixing bracket, there is no need to set up an additional bracket for fixing, which meets the limit fixation of the pressure monitoring device at the wellhead and in the tunnel.

[0043] The present invention provides a cable bend protection device, comprising a pressure monitoring device 7, a monitoring box 800 and an auxiliary fixing bracket; the pressure monitoring device 7 is arranged at the bend of the cable 6, the pressure monitoring device 7 is set on the auxiliary fixing bracket, and is electrically connected to the monitoring box 800; the auxiliary fixing bracket is used to limit and fix the pressure monitoring device 7, so that it can be used at the wellhead and the bend in the tunnel.

[0044] The auxiliary fixed bracket includes a wellhead fixed limit bracket 8 and a fixed rod 9 for horizontal application scenarios. In the vertical turning downhole scenario, the pressure monitoring device 7 is set on the wellhead fixed limit bracket 8; in the horizontal turning downhole scenario, the pressure monitoring device 7 is connected to the corresponding fixed rod 9 for horizontal application scenarios.

[0045] The pressure monitoring device 7 includes a base frame 3, a roller, a force sensor 4, and a data acquisition and transmission module 5. The base frame 3 adopts an L-shaped structure, which is used for the vertical and horizontal turns of the cable 6 and has good stability. Two rollers are installed on the base frame 3. The force measuring pulley 1 is a force measuring roller. The force measuring pulley 1 is arranged with a force sensor 4. The force sensor 4 adopts an axle pin connection, which can meet both the force measurement and the roller support. The protection wheel 2 is a limited protection roller. The protection wheel 2 is arranged with a bearing to reduce the friction of the cable while protecting it from running out. The data acquisition module and the transmission module 5 are installed on the base frame 3 to better realize the integration of the device. See also Figure 4 The measurement and control box 800 includes a sensor interface 801; a battery unit 802; a data acquisition unit 803; a display unit 804; an alarm unit 805; a data export interface 806; a communication unit 807; and a charging interface 808. It is mainly used for collecting, displaying, storing, and outputting alarms for the opposite side pressure. All components are placed in the box for protection. The power output ends of the storage device are respectively connected to the display screen, the microprocessor, the data acquisition module, the communication module, and the sound and light alarm output module.

[0046] The sensor interface 801 and the data acquisition unit 803 are electrically connected to the multiple pressure sensors, and the data acquisition unit 803 is used to receive the side pressure values ​​detected by the multiple pressure sensors; An alarm unit 805 is electrically connected to the data acquisition unit 803, and is used to generate a fault alarm signal when the pressure value on either side exceeds a preset pressure value; The communication unit 807 is electrically connected to the alarm unit 805. The communication unit 807 is used to receive the fault alarm signal output by the alarm unit 805 to the cable laying equipment to stop laying the power equipment and ensure the safety of cable laying; The battery unit 802 is used to power the device without the need for an external power source, which greatly reduces the flexibility of the device; Display unit 804, used for displaying sensor data and setting parameters, making it easier to view on-site data; A charging interface 808, used to charge the battery unit; The data export interface 806 is used to export data, and the data is exported through a USB flash drive.

[0047] During the laying process, multiple pressure sensors are used to detect the lateral pressure values ​​at different positions of the bent cable. The lateral pressure values ​​of the cable are independently detected at multiple positions, which facilitates more accurate positioning of abnormal lateral pressure points. When the pressure value on either side exceeds the preset pressure value, a fault alarm signal is generated and output to the traction equipment to shut down the traction equipment and stop laying the cable, which can reduce the chance of cable damage and improve the safety of cable laying.

[0048] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings here can usually be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0049] Example 1 See also Figure 1 , 1 is a force measuring pulley, 2 is a protection wheel, 3 is a base frame, which is arranged in an L shape to better ensure the stability of the device; 301 is a vertical connection block for connecting and fixing multiple pressure monitoring devices, 302 is a horizontal connection block for connecting and fixing multiple pressure monitoring devices; 4 is a force sensor for detecting the pressure of the cable during the turning process; 5 is a data acquisition and transmission module for collecting data from the pressure sensor and transmitting the data to the pressure measurement and control box.

[0050] Application scenario 1 description: See also Figure 2 , Figure 2 An efficient and easy-to-install pressure monitoring solution is presented for monitoring the lateral pressure generated by the cable 6 when it turns in the lower tunnel shaft. This design is particularly suitable for application scenarios that require accurate monitoring of the stress state of underground cables under complex path conditions, such as in power transmission or urban infrastructure construction.

[0051] The core component of the solution is a plurality of pressure monitoring devices 7, which are integrated into the whole system through a special connection structure. Each pressure monitoring device is equipped with a high-precision pressure sensor, which can capture the lateral pressure changes at the cable bend in real time. These devices are connected to each other through a vertical connection block 301 and fixed by bolt connection, ensuring a stable connection between the monitoring devices.

[0052] The design of the connection blocks 301 takes into account the convenience and flexibility in actual operation. They can be quickly assembled and disassembled, making the installation and adjustment of the pressure monitoring device simple. In addition, this design also allows the number of monitoring devices to be flexibly increased or decreased according to actual needs, thereby achieving comprehensive monitoring of the side pressure in different areas or under various conditions.

[0053] In order to further enhance the stability and reliability of the system, the pressure monitoring device is connected to the wellhead fixed limit frame 8 by bolts. This design not only simplifies the installation process without the need for additional brackets, but also ensures firmness in actual operation. The design of the wellhead fixed limit frame 8 cleverly utilizes four limit columns and brackets, and can be placed directly at the wellhead to provide strong support.

[0054] One of the great advantages of this design is its convenience. Since there is no need for a complicated installation process, construction workers can set up and use it directly at the wellhead, which greatly shortens the preparation time and reduces the labor intensity. At the same time, due to the stable design of the limit column and bracket, the stability of the entire system is effectively guaranteed, and accurate data collection can be maintained even under extreme conditions.

[0055] In general, Figure 2 The cable bend lateral pressure monitoring solution shown provides an efficient and stable solution through innovative connection structure and limit device, which is especially suitable for application scenarios with extremely high requirements for real-time data accuracy.

[0056] Application scenario 2 description: See also Figure 3 , Figure 3 An innovative cable horizontal turning side pressure monitoring system was demonstrated, which consists of multiple pressure monitoring devices 7, which are interconnected and fixed through ingenious design to adapt to different application environments. The following is a detailed description of the system: Pressure monitoring device 7: This is the core component of the system, responsible for real-time monitoring of the lateral pressure on the cable at the horizontal bend. Each device contains a high-precision pressure sensor and related electronic components, which can transmit the collected data to the monitoring center for analysis and recording.

[0057] Horizontal connection blocks 302: These special connection blocks are designed to facilitate the connection of multiple pressure monitoring devices. They allow the devices 7 to dock with each other in the horizontal direction to form a continuous monitoring system. The connection blocks are designed with ease of use and reliability in mind, ensuring that the devices can be securely connected together.

[0058] Bolted connection: In order to further enhance the stability of the system, multiple pressure monitoring devices are fixed together by bolting. This connection method not only ensures close contact between the monitoring devices, but also makes the structure of the entire system more stable and able to withstand various forces that may occur.

[0059] Fixed rod 9: In order to ensure the stable positioning of the pressure monitoring device during work, a fixed rod 9 is designed for horizontal application scenarios. The front end of the fixed rod is provided with a bayonet, which can be directly buckled on the base frame of the pressure monitoring device for quick installation. In addition, the length of the fixed rod can be adjusted so that it can adapt to monitoring requirements of different lengths. In actual applications, the lower end of the fixed rod can be supported on the ground, tunnel wall or other suitable locations without the need for additional brackets, which greatly simplifies the installation process and improves the convenience of use.

[0060] Multiple pressure monitoring devices 7 are connected by bolts through the horizontal connection block 302. At the same time, the pressure monitoring device 7 is fixed by the fixing rod 9 in the horizontal application scenario. The front end of the fixing rod 9 in the horizontal application scenario is provided with a bayonet, which can be directly clamped on the bottom frame of the pressure monitoring device 7. Its length is adjustable, and the lower end can be used for support on the ground or the tunnel wall, etc., without the need to set up a separate bracket to fix the pressure monitoring device, and the installation and use are convenient.

[0061] Application scenarios: The system is particularly suitable for various scenarios where it is necessary to monitor the lateral pressure of cables at horizontal bends, such as underground tunnels, cable trays and other similar infrastructure. By accurately measuring the lateral pressure, it can help engineers evaluate the stress of cables during operation, identify potential risk factors in a timely manner, and ensure the safe and stable operation of the power system.

[0062] In conclusion, Figure 3 The cable horizontal bend side pressure monitoring system shown in the figure greatly improves the efficiency and accuracy of power system maintenance work through its ingenious design and easy operation.

[0063] In this embodiment, the pressure monitoring device installs a force sensor on the shaft of the force wheel of the turning pulley, and uses the sensor instead of the rotating shaft; in order to better ensure the accuracy of its measurement of the lateral pressure exerted on the cable when turning, the force analysis of the cable turning is performed.

[0064] (1) Analysis of cable stress on pressure monitoring device at bends The force diagram of the cable at the bend of the pressure monitoring device is as follows: Figure 5 As shown, according to the force diagram, is the actual lateral tension on the cable, Measured value of the force sensor.

[0065] See also Figure 6 , according to the symmetrical stress condition, the stress analysis is carried out:

[0066]

[0067]

[0068]

[0069]

[0070] According to the theoretical mechanics formula It can be seen that when θ is small, Approximately equal to ; μ represents the friction coefficient, and θ represents the angle between the forces.

[0071] Therefore, it can be approximately considered that = .

[0073] (2) Cable bending force analysis Assume that the turning angle is 90° during the actual cable laying, and three sets of evenly spaced turning pulleys form the turning radius R, as shown in Figure 7 As shown, each turning pulley roller makes the cable turn at angles of 9°, 18°, 18°, 18°, 18°, and 9°, respectively.

[0074] 1. When passing the first turning pulley: That is, α=153° and the force is symmetrical, and the force is calculated according to the following formula:

[0075]

[0076]

[0077] Depend on and The calculation results show that the side pressure sensor displays the value and the lateral pressure on the cable Basically the same. When the turning angle is small, the side pressure sensor displays the value and the lateral pressure on the cable The error is very small. and The theoretical error between the two values ​​is 0.85%.

[0078] Analyze the limit case and Theoretical error: The value of changes with the angle, and increases with the increase of α angle. When the α limit value is 90° (only one pressure monitoring device is used at the turn), and The theoretical limit error between the two values ​​is 7.58%. Therefore, increasing the number of turning pulleys can reduce the α angle, thereby reducing and In order to achieve the theoretical error, three to four pressure monitoring devices are generally used at the turning point, and the theoretical error has reached 0.85%, which meets the use requirements.

[0079] In actual testing, The change in the ratio is caused by the change in the actual turning angle due to the stiffness of the cable itself.

[0080] To sum up, the cable turning protection device of the present invention provides a strong guarantee for the safe operation of cable lines with its advantages and benefits of accurate pressure monitoring, flexible adaptability, stable fixing method, convenient installation and maintenance, intelligent monitoring and management, and improved construction efficiency and safety.

[0081] The above contents are only for explaining the technical idea of ​​the present invention and cannot be used to limit the protection scope of the present invention. Any changes made on the basis of the technical solution in accordance with the technical idea proposed by the present invention shall fall within the protection scope of the claims of the present invention.

Claims

1. A cable bend protection device, characterized in that: It comprises a pressure monitoring device (7), the pressure monitoring device (7) is arranged at the turning point of the cable (6), the pressure monitoring device (7) is set on an auxiliary fixing bracket to achieve the limit and fixation of the pressure monitoring device (7), and is electrically connected to the monitoring box (800); The auxiliary fixed support comprises a wellhead fixed limit frame (8) and a fixed rod (9) for horizontal application scenarios. In a vertical turning downhole scenario, the pressure monitoring device (7) is arranged on the wellhead fixed limit frame (8); in a horizontal turning downhole scenario, the pressure monitoring device (7) is connected to the corresponding fixed rod (9) for horizontal application scenarios.

2. The cable bend protection device according to claim 1, characterized in that: The pressure monitoring device (7) comprises a plurality of pressure monitoring devices, each of which comprises a base frame (3), on which a force measuring pulley (1), a protection wheel (2), a data acquisition module and a transmission module (5) are mounted correspondingly, the lower side of the cable (6) is in contact with and connected to the force measuring pulley (1), the inner side of the cable (6) is in contact with and connected to the protection wheel (2), a force measuring sensor (4) is arranged in the force measuring pulley (1), and the force measuring sensor (4) is electrically connected to the monitoring box (800) via the data acquisition module and the transmission module (5).

3. The cable bend protection device according to claim 2, characterized in that: The protection wheel (2) is a position-limiting protection roller, and a bearing is arranged in the protection wheel (2).

4. The cable bend protection device according to claim 2, characterized in that: The base frame (3) is arranged in an L-shape, the vertical section is provided with a vertical connection block (301) for connecting multiple pressure monitoring devices (7) in a vertical turning downhole scenario, and the horizontal section is provided with a horizontal connection block (302) for connecting multiple pressure monitoring devices (7) in a horizontal turning downhole scenario.

5. The cable bend protection device according to claim 4, characterized in that: In a vertical turning downhole scenario, multiple pressure monitoring devices (7) are butt-jointed via a vertical connection block (301) and connected via bolts; the pressure monitoring devices (7) are connected to a wellhead fixed limit frame (8) via bolts, and the wellhead fixed limit frame (8) is provided with (4) limit columns and brackets.

6. The cable bend protection device according to claim 4, characterized in that: In a horizontal turning downhole scenario, a plurality of pressure monitoring devices (7) are butt-jointed and connected via a horizontal connection block (302) provided on a base frame (3), and the pressure monitoring devices (7) are fixed in position by a fixing rod (9) in a horizontal application scenario, and a bayonet is provided at the front end of the fixing rod (9) in a horizontal application scenario for being clamped on the base frame of the pressure monitoring device (7).

7. The cable bend protection device according to claim 6, characterized in that: In a horizontal application scenario, the front end length of the fixing rod (9) is adjustable, and the lower end is used for support.

8. The cable bend protection device according to claim 1, characterized in that: The measurement and control box (800) comprises a sensor interface (801), and the pressure monitoring device (7) is connected to a data acquisition unit (803) via the sensor interface (801). The data acquisition unit (803) is used to receive a pressure value detected by the pressure sensor (7).

9. The cable bend protection device according to claim 8, characterized in that: The data collection unit (803) is connected to the communication unit (807) via the alarm unit (805).

10. The cable bend protection device according to claim 9, characterized in that: The measurement and control box (800) further comprises a battery unit (802) for powering the equipment; A display unit (804), used for displaying sensor data and setting parameters; A charging interface (808), used to charge the battery unit (802); The data export interface (806) is used to export data.

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