Connecting device with function of dynamically adjusting clamping force

Abstract

The invention provides a connection device with a dynamic clamping force adjusting function, and relates to the technical field of wire connection, and the device is characterized in that a lower clamping body is provided with a first arc-shaped groove, and an upper clamping body is provided with a second arc-shaped groove corresponding to the first arc-shaped groove; the fixed shell is fixedly connected with the lower clamping body; a driving mechanism is installed on the fixed shell, a transmission mechanism is arranged in the fixed shell, one end of the transmission mechanism is connected with the upper clamping body, and the other end of the transmission mechanism is connected with the driving end of the driving mechanism; the monitoring control mechanism is electrically connected with the driving mechanism and used for detecting the clamping force of the upper clamping body and the lower clamping body on the cable and the thermal field distribution on the upper clamping body and the lower clamping body and controlling the driving mechanism to work according to the monitoring result of the clamping force and the thermal field distribution. Therefore, the clamping force on the cable can be dynamically adjusted. According to the scheme, the clamping force on the cable can be dynamically adjusted by monitoring the pressure and the temperature in real time.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wire splicing, in particular to a splicing device with dynamic clamping force adjustment function. BACKGROUND

[0002] Splicing fittings are important components in power systems for connecting two or more cables to achieve reliable transmission of electric energy. Its main function is to ensure that the cable connection part has good electrical conductivity, and to reduce the contact resistance and the loss of electric energy at the connection as much as possible. At the same time, it provides reliable mechanical connection for the cable to ensure that the connection part can withstand the tension, wind force, vibration and other external forces of the cable itself, and maintain the stability and safety of power transmission.

[0003] In the actual use of splicing fittings, too large or too small clamping force on the cable can have many adverse effects. For example, if the clamping force of the splicing fitting on the cable is too large, it may cause plastic deformation of the metal conductor, change its internal crystal structure, reduce the mechanical strength and electrical conductivity of the metal conductor, and shorten the service life of the cable. Moreover, when the clamping force is too large and the microstructure of the contact surface between the fitting and the cable is damaged, the contact resistance may also increase due to the micro-unevenness of the contact surface. In addition, too large clamping force will also cause the splicing fitting to bear a large stress, which is easy to cause fatigue damage of the fitting and appear cracks and other defects, thereby affecting the normal function of the fitting. If the clamping force of the splicing fitting on the cable is too small, it is easy to cause the cable to disconnect. Moreover, too small clamping force will increase the contact resistance between the fitting and the cable, thereby increasing the cable loss. Therefore, the appropriate clamping force between the splicing fitting and the cable is of great significance in prolonging the service life of the cable and the fitting, improving the connection reliability and reducing the loss, etc.

[0004] However, the current splicing fittings generally use a completely fixed clamping method, and this method is very easy to cause too large or too small clamping force with the change of external environment. For example, as the environmental temperature rises, the cable will expand and cause the clamping force of the splicing fitting to be too large. Similarly, as the environmental temperature decreases, the cable will shrink and cause the clamping force of the splicing fitting to be too small. For example, in strong wind weather, the cable may swing due to wind force, thereby causing the connection part to loosen or damage. Therefore, the existing splicing fittings are easy to cause too large or too small clamping force due to the dynamic change of the external environment, thereby adversely affecting the service life, connection reliability and loss of the cable and the splicing fitting. SUMMARY

[0005] Therefore, in view of the above shortcomings, it is necessary to provide a splicing device with dynamic clamping force adjustment function to dynamically adjust the clamping force on the cable by real-time monitoring of pressure and temperature.

[0006] The application provides a splicing device with a dynamic clamping force adjusting function, which comprises a lower clamping body, an upper clamping body, a fixed shell, a transmission mechanism, a driving mechanism and a monitoring control mechanism; the upper surface of the lower clamping body is provided with N first arc-shaped grooves, the upper clamping body comprises at least one and is arranged above the lower clamping body, each upper clamping body comprises N second arc-shaped grooves and corresponds to the first arc-shaped grooves on the lower clamping body respectively, so as to clamp the cable through the second arc-shaped grooves of the upper clamping body and the first arc-shaped grooves on the lower clamping body; the fixed shell is arranged above the upper clamping body and is fixedly connected with the lower clamping body; the driving mechanism is installed on the fixed shell, the transmission mechanism is arranged in the fixed shell, one end of the transmission mechanism is connected with the upper clamping body, and one end of the transmission mechanism is connected with the driving end of the driving mechanism, so that the driving mechanism drives the upper clamping body to move towards the lower clamping body or away from the lower clamping body, and the clamping force on the cable is adjusted; wherein N is greater than or equal to 1. The monitoring control mechanism is electrically connected with the driving mechanism, the monitoring control mechanism is used for detecting the clamping force of the upper clamping body and the lower clamping body on the cable and the thermal field distribution on the upper clamping body and the lower clamping body, and controlling the driving mechanism to work according to the monitoring results of the clamping force and the thermal field distribution, so as to dynamically adjust the clamping force on the cable.

[0007] Preferably, the upper surface of the lower clamping body is provided with two first arc-shaped grooves; the upper clamping body comprises two and is sequentially arranged along the axial direction of the lower clamping body; the lower surface of each of the two upper clamping bodies comprises two second arc-shaped grooves; the outer side of each of the two upper clamping bodies is provided with a rectangular groove, the lower surface of the fixed shell is provided with a rectangular protrusion corresponding to the position of the rectangular groove, the rectangular protrusion can be inserted into the rectangular groove and clamped, and the first bolt on the fixed shell is fixedly connected with the lower clamping body after penetrating through the rectangular protrusion.

[0008] Preferably, the two upper clamping bodies are spaced apart, the driving mechanism is arranged at the spacing, the upper surface of the driving mechanism is fixedly connected with the lower surface of the fixed shell, and the driving end of the driving mechanism extends into the fixed shell and is drivingly connected with the transmission mechanism.

[0009] Preferably, the transmission mechanism comprises a driving gear arranged inside the fixed shell and two sets of transmission assemblies, the driving gear is connected with the driving end of the driving mechanism in a manner that the driving gear is driven to rotate, and the two sets of transmission assemblies are symmetrically arranged on the two sides of the driving gear and used for driving the two upper clamping bodies respectively by the driving mechanism; each set of transmission assembly comprises a first gear, a second gear and a bearing, the first gear is connected with the driving gear in a toothed manner, the second gear is connected with the first gear in a toothed manner, the lower surface of the second gear is fixedly connected with the upper surface of the inner ring of the bearing, and the lower surface of the outer ring of the bearing is fixedly connected with the bottom surface of the fixed shell; a threaded through hole is arranged on the upper clamping body, the upper end of the second bolt is fixedly connected with the lower surface of the second gear, the other end of the second bolt extends into the threaded through hole of the upper clamping body through the center through hole of the bearing, and the second bolt is screwed with the threaded through hole.

[0010] Preferably, the monitoring and control mechanism comprises a pressure sensor, a temperature sensor and a control module; the pressure sensor, the temperature sensor and the driving mechanism are electrically connected with the control module arranged on the fixed shell, the pressure sensor is arranged in the second arc-shaped groove of the upper clamping body and used for monitoring the clamping force of the upper clamping body and the lower clamping body on the cable and sending the clamping force monitoring result to the control module; the temperature sensor is arranged on the upper clamping body or the lower clamping body and used for monitoring the temperature on the clamping body and sending the temperature monitoring result to the control module; and the control module is used for controlling the driving mechanism to work according to the uploaded clamping force monitoring result and the temperature monitoring result, so as to adjust the clamping force on the cable.

[0011] Preferably, the control module is used for judging whether the uploaded clamping force monitoring result is located between the preset upper limit of the clamping force and the lower limit of the clamping force; if the clamping force monitoring result is less than or equal to the lower limit of the clamping force, the driving mechanism is controlled to work in a forward direction to drive the upper clamping body to move downward and increase the clamping force on the cable; and if the clamping force monitoring result is greater than or equal to the upper limit of the clamping force, the driving mechanism is controlled to work in a reverse direction to drive the upper clamping body to move upward and reduce the clamping force on the cable.

[0012] Preferably, the control module is further used for judging whether the uploaded temperature monitoring result is greater than a preset temperature threshold when the clamping force monitoring result is located between the preset upper limit of the clamping force and the lower limit of the clamping force; if the temperature monitoring result is greater than the preset temperature threshold, the driving mechanism is controlled to work in the reverse direction to reduce the clamping force on the cable within the range of the upper limit of the clamping force and the lower limit of the clamping force; and if the temperature monitoring result is less than the preset temperature threshold, the driving mechanism is controlled to work in the forward direction to increase the clamping force on the cable within the range of the upper limit of the clamping force and the lower limit of the clamping force.

[0013] Preferably, the driving mechanism and the control module are both provided with an isolation shell, the isolation shell and the fixed shell are both made of electrically insulating material, and a non-magnetic metal layer is arranged inside the isolation shell and the fixed shell to reduce the influence of external electromagnetic field on the electronic components of the driving mechanism and the control module.

[0014] Preferably, the second bolt, the first gear, the second gear and the bearing are all made of ceramic or polytetrafluoroethylene.

[0015] Preferably, the upper surface and the side surface of the upper clamping body are both sprayed with a ceramic coating.

[0016] As can be seen from the above technical solution, the splicing device provided by the embodiment of the present application has the function of dynamically adjusting the clamping force, which includes a lower clamping body, an upper clamping body, a fixed shell, a transmission mechanism, a driving mechanism and a monitoring control mechanism. The upper surface of the lower clamping body is provided with a first arc-shaped groove, the upper clamping body is arranged above the lower clamping body, and the lower surface of the upper clamping body is provided with a second arc-shaped groove corresponding to the first arc-shaped groove, so as to clamp the cable through the first arc-shaped groove and the second arc-shaped groove. The fixed shell is fixedly connected with the lower clamping body and located above the upper clamping body. The fixed shell is internally provided with the transmission mechanism. The driving end of the driving mechanism installed on the fixed shell is connected with one end of the transmission mechanism, and the other end of the transmission mechanism is connected with the upper clamping body. In this way, the upper clamping body can be driven by the driving mechanism to move towards or away from the lower clamping body, so as to adjust the clamping force on the cable. In addition, the splicing device provided by the present solution further includes a monitoring control mechanism electrically connected with the driving mechanism. The monitoring control mechanism can monitor the clamping force of the cable by the upper clamping body and the lower clamping body, and the thermal field distribution on the upper clamping body and the lower clamping body, and control the driving mechanism to work according to the monitoring results of the clamping force and the thermal field distribution, so as to dynamically adjust the clamping force on the cable. As can be seen, the monitoring control mechanism can monitor the clamping force of the cable by the upper clamping body and the lower clamping body, and the thermal field distribution on the clamping body in real time, so as to dynamically adjust the clamping force on the cable according to the monitoring results. For example, when the clamping force on the cable is too small, the clamping force can be increased by the driving mechanism to avoid the cable from being separated, and when the clamping force on the cable is too large, the clamping force can be reduced by the driving mechanism to reduce the risk of damage and life reduction of the cable. Similarly, if it is determined through the thermal field distribution monitoring that the temperature is relatively large, the clamping force can be appropriately reduced by the driving mechanism to avoid the cable from being clamped too tightly due to thermal expansion, and if it is determined through the thermal field distribution monitoring that the temperature is relatively low, the clamping force can be appropriately increased by the driving mechanism to avoid the cable from being clamped too tightly due to low temperature contraction. Therefore, the splicing device provided by the present solution can dynamically adjust the clamping force on the cable according to the changes of the external environment. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 A schematic diagram of a connecting device with dynamic adjustment of clamping force function provided by an embodiment of the present application.

[0018] Figure 2 A side view of a connecting device with dynamic adjustment of clamping force function provided by an embodiment of the present application.

[0019] Figure 3 A structural schematic diagram of the inside of the fixed shell of a connecting device with dynamic adjustment of clamping force function provided by an embodiment of the present application.

[0020] Figure 4 A Figure 2 A sectional view at A-A in the figure.

[0021] Figure 5 A side view of a connecting device with dynamic adjustment of clamping force function provided by an embodiment of the present application without a fixed shell.

[0022] Figure 6 A structural schematic diagram of the fixed shell provided by an embodiment of the present application.

[0023] In the figure: lower clamping body 10, first arc-shaped groove 11, upper clamping body 20, second arc-shaped groove 21, rectangular recess 22, fixed shell 30, rectangular protrusion 31, transmission mechanism 40, driving gear 41, transmission assembly 42, first gear 421, second gear 422, bearing 423, second bolt 424, driving mechanism 50, monitoring and control mechanism 60, pressure sensor 61, temperature sensor 62, control module 63, cable 70, first bolt 80. DETAILED DESCRIPTION

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. Obviously, the drawings described in the following are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0025] Referring to Figures 1-6The embodiment of the present application provides a splicing device with a dynamic clamping force adjusting function, which comprises a lower clamping body 10, an upper clamping body 20, a fixed shell 30, a transmission mechanism 40, a driving mechanism 50 and a monitoring control mechanism 60; the upper surface of the lower clamping body 10 is provided with N first arc-shaped grooves 11, the upper clamping body 20 comprises at least one and is arranged above the lower clamping body 10, each upper clamping body 20 comprises N second arc-shaped grooves 21 and corresponds to the first arc-shaped groove 11 on the lower clamping body 10 respectively, so as to clamp the cable 70 through the second arc-shaped groove 21 of the upper clamping body 20 and the first arc-shaped groove 11 on the lower clamping body 10; the fixed shell 30 is arranged above the upper clamping body 20 and is fixedly connected with the lower clamping body 10; the driving mechanism 50 is installed on the fixed shell 30, the transmission mechanism 40 is arranged in the fixed shell 30, one end of the transmission mechanism 40 is connected with the upper clamping body 20, and one end is connected with the driving end of the driving mechanism 50, so that the driving mechanism 50 drives the upper clamping body 20 to move towards or away from the lower clamping body 10, and the clamping force on the cable 70 is adjusted; wherein N is greater than or equal to 1. The monitoring control mechanism 60 is electrically connected with the driving mechanism 50, the monitoring control mechanism 60 is used for detecting the clamping force of the upper clamping body 20 and the lower clamping body 10 on the cable 70 and the thermal field distribution on the upper clamping body 20 and the lower clamping body 10, and controlling the driving mechanism 50 to work according to the monitoring results of the clamping force and the thermal field distribution, so as to dynamically adjust the clamping force on the cable 70.

[0026] In order to clamp two cables 70, so as to play a role of connecting and conducting the cables 70. In one embodiment, the upper surface of the lower clamping body 10 can be provided with two first arc-shaped grooves 11; the upper clamping body 20 can comprise two and be sequentially arranged along the axial direction of the lower clamping body 10; the lower surface of each of the two upper clamping bodies 20 comprises two second arc-shaped grooves 21; the outer side of each of the two upper clamping bodies 20 is provided with a rectangular groove 22, the lower surface of the fixed shell 30 is provided with a rectangular protrusion 31 corresponding to the position of the rectangular groove 22, the rectangular protrusion 31 can be inserted into the rectangular groove 22 and clamped; the first bolt 80 on the fixed shell 30 is fixedly connected with the lower clamping body 10 after penetrating through the rectangular protrusion 31.

[0027] In the embodiment, the upper clamping bodies 20 and the lower clamping bodies 10 are arranged in pairs, and the first arc-shaped grooves 11 and the second arc-shaped grooves 21 correspond to each other. When the cables 70 are clamped, the connecting end of one of the cables 70 extends from one side where one of the upper clamping bodies 20 is located into one of the first arc-shaped grooves 11 and the second arc-shaped grooves 21, so as to be clamped by the lower clamping body 10 corresponding to the first arc-shaped groove 11 and the upper clamping body 20 corresponding to the second arc-shaped groove 21 on the side. The connecting end of the other cable 70 extends from the other side where the other upper clamping body 20 is located into the other first arc-shaped groove 11 and the second arc-shaped groove 21, so as to be clamped by the lower clamping body 10 corresponding to the first arc-shaped groove 11 and the upper clamping body 20 corresponding to the second arc-shaped groove 21 on the side. In addition, the upper clamping bodies 20 and the lower clamping bodies 10 can be made of conductive materials, so as to realize the conductive connection of the two cables 70.

[0028] In addition, the inner surfaces of the first arc-shaped grooves 11 and the second arc-shaped grooves 21 can be provided with protrusions, so as to increase the friction when the upper clamping bodies 20 and the lower clamping bodies 10 clamp the cables 70, avoid slipping during clamping, and affect the clamping effect.

[0029] In order to make the structure of the whole connecting device more compact, in one embodiment, the two upper clamping bodies 20 can be provided with a gap, and the driving mechanism 50 is arranged in the gap. The upper surface of the driving mechanism 50 is fixedly connected with the lower surface of the fixed shell 30, and the driving end of the driving mechanism 50 extends into the fixed shell 30 and is drivingly connected with the transmission mechanism 40. In this way, by arranging the driving mechanism 50 in the gap between the two upper clamping bodies 20, the driving of the two upper clamping bodies 20 on both sides can be realized, the movement control of the upper clamping bodies 20 can be realized, and the height and volume of the device can be greatly reduced. In addition, the structure of the whole device is more compact.

[0030] In an embodiment, the transmission mechanism 40 can include a driving gear 41 arranged inside the fixed shell 30, and two sets of transmission assemblies 42 arranged symmetrically on both sides of the driving gear 41, the driving gear 41 being connected to the driving end of the driving mechanism 50 in a manner that the driving gear 41 is driven to rotate by the driving mechanism 50, and each set of transmission assemblies 42 including a first gear 421, a second gear 422, and a bearing 423, the first gear 421 being toothedly connected to the driving gear 41, the second gear 422 being toothedly connected to the first gear 421, and the lower surface of the second gear 422 being fixedly connected to the upper surface of the inner ring of the bearing 423, the lower surface of the outer ring of the bearing 423 being fixedly connected to the bottom surface of the fixed shell 30, and the upper clamping body 20 being provided with a threaded hole, the upper end of a second bolt 424 being fixedly connected to the lower surface of the second gear 422, the other end of the second bolt 424 extending into the threaded hole of the upper clamping body 20 through the central through hole of the bearing 423, and the second bolt 424 being threadedly connected to the threaded hole.

[0031] In the embodiment, the transmission assemblies 42 arranged symmetrically on both sides of the driving gear 41 are identical in structure, and each includes a first gear 421, a second gear 422, and a bearing 423. The first gear 421 is toothedly connected to the driving gear 41, and the driving gear 41 is connected to the driving end of the driving mechanism 50, so that the driving mechanism 50 can drive the driving gear 41 to rotate when the driving mechanism 50 works, and the rotation of the driving gear 41 can drive the first gear 421 to rotate. The first gear 421 is toothedly connected to the second gear 422, so that the rotation of the first gear 421 can drive the second gear 422 to rotate. Further, the lower surface of the second gear 422 is fixedly connected to the upper surface of the inner ring of the bearing 423, the lower surface of the outer ring of the bearing 423 is fixedly connected to the bottom surface of the fixed shell 30, the upper clamping body 20 is provided with a threaded hole, the upper end of the second bolt 424 is fixedly connected to the lower surface of the second gear 422, the other end of the second bolt 424 extends into the threaded hole of the upper clamping body 20 through the central through hole of the bearing 423, and the second bolt 424 is threadedly connected to the threaded hole. Therefore, when the second gear 422 rotates, the second bolt 424 is driven to rotate, and the upper clamping body 20 is driven to move in the vertical direction, i.e., the driving mechanism 50 can control the movement of the upper clamping body 20 in the direction of approaching or moving away from the lower clamping body 10.

[0032] Of course, it should be pointed out that, since the outer side of the two upper clamping bodies 20 is provided with a rectangular recess 22, the lower surface of the fixed shell 30 is provided with a rectangular protrusion 31 corresponding to the position of the rectangular recess 22, which can be inserted into the rectangular recess 22 for clamping, and the first bolt 80 on the fixed shell 30 is fixedly connected with the lower clamping body 10 after passing through the rectangular protrusion 31. In this way, when the driving mechanism 50 drives the second bolt 424 to rotate, the rotation of the upper clamping body 20 is limited because the rectangular protrusion 31 on the fixed shell 30 is clamped in the rectangular recess 22 on the upper clamping body 20. That is, when the driving mechanism 50 drives the second bolt 424 to rotate, the upper clamping body 20 does not rotate, thereby achieving control of the upward or downward movement of the upper clamping body 20.

[0033] In order to realize the monitoring of the clamping force and temperature, and the adjustment of the clamping body, in an embodiment, the monitoring and control mechanism 60 can include a pressure sensor 61, a temperature sensor 62 and a control module 63; the pressure sensor 61, the temperature sensor 62 and the driving mechanism 50 are electrically connected with the control module 63 arranged on the fixed shell 30, the pressure sensor 61 is arranged in the second arc-shaped groove 21 of the upper clamping body 20, for monitoring the clamping force of the upper clamping body 20 and the lower clamping body 10 on the cable 70, and sending the clamping force monitoring result to the control module 63; the temperature sensor 62 is arranged on the upper clamping body 20 or the lower clamping body 10, for monitoring the temperature on the clamping body, and sending the temperature monitoring result to the control module 63; the control module 63 is used for controlling the driving mechanism 50 to work according to the uploaded clamping force monitoring result and temperature monitoring result, so as to adjust the clamping force of the cable 70.

[0034] In the embodiment, the temperature sensor 62 can be a thermocouple or a thermistor temperature sensor 62, and in addition, can include an infrared array sensor for forming a temperature distribution cloud map of the surface of the clamping body. For the pressure sensor 61, a thin film pressure sensor 61 can be selected, which is attached to the surface of the clamping body in contact with the cable 70, and can be arranged in a matrix form to accurately capture the contact pressure distribution. The control module 63 can be a high-performance microcontroller, such as an STM32 series, and the driving mechanism 50 can be a stepper motor, which is controlled by a pulse width modulation signal to control the speed and direction of the stepper motor driver, so as to realize the adjustment of the clamping force of the cable 70.

[0035] In the judgment control according to the monitoring result, the control module 63 can first be used to judge whether the uploaded clamping force monitoring result is between the preset upper limit of clamping force and the lower limit of clamping force; if the clamping force monitoring result is less than or equal to the lower limit of clamping force, the driving mechanism 50 is controlled to operate in the forward direction, driving the upper clamping body 20 to move downward to increase the clamping force on the cable 70; if the clamping force monitoring result is greater than or equal to the upper limit of clamping force, the driving mechanism 50 is controlled to operate in the reverse direction, driving the upper clamping body 20 to move upward to reduce the clamping force on the cable 70. Among them, the upper limit of clamping force can be the maximum clamping force that can avoid causing great damage to the cable 70, and the lower limit of clamping force can be the minimum clamping force that can avoid the cable 70 from being disconnected or separated from the clamping. In this way, by adjusting the clamping force on the cable 70 to be maintained between the maximum clamping force and the minimum clamping force, effective clamping of the cable 70 can be achieved, avoiding disconnection and falling off of the cable 70, and at the same time, damage to the cable 70 caused by excessive clamping force can also be avoided.

[0036] Further, the clamping force on the cable 70 can also be dynamically adjusted according to the temperature condition of the clamping body. Specifically, the control module 63 can also be used to judge whether the uploaded temperature monitoring result is greater than the preset temperature threshold when the clamping force monitoring result is between the preset upper limit of clamping force and the lower limit of clamping force; if the temperature monitoring result is greater than the preset temperature threshold, the driving mechanism 50 is controlled to operate in the reverse direction to reduce the clamping force on the cable 70 within the range of the upper limit of clamping force and the lower limit of clamping force; if the temperature monitoring result is less than the preset temperature threshold, the driving mechanism 50 is controlled to operate in the forward direction to increase the clamping force on the cable 70 within the range of the upper limit of clamping force and the lower limit of clamping force. In this way, the clamping force on the cable 70 can be dynamically adjusted according to the dynamic change of the temperature, ensuring that it is between the upper limit of clamping force and the lower limit of clamping force, and adjusting the clamping force according to the change of the temperature can appropriately reduce the excessive clamping force or insufficient clamping force of the clamping body caused by external temperature changes or internal heating of the clamping body, thereby reducing the adverse effects on the service life, connection reliability and loss of the cable 70 and the connecting fittings.

[0037] In addition, in order to avoid the electromagnetic field generated by the cable 70 from affecting the electronic components in the contact device, in an embodiment, an isolation shell is considered to be arranged outside the driving mechanism 50 and the control module 63, the isolation shell and the fixed shell 30 are both made of electrically insulating materials, and a layer of non-magnetic metal is arranged inside the isolation shell and the fixed shell 30 to reduce the influence of external electromagnetic field on the electronic components of the driving mechanism 50 and the control module 63. Specifically, the electrically insulating material can be ceramic or polytetrafluoroethylene, etc.

[0038] Likewise, in order to avoid the influence of the cable 70 on the operation of the conductive butt joint device, the second bolt 424, the first gear 421, the second gear 422 and the bearing 423 are all made of ceramic or polytetrafluoroethylene to avoid eddy current heating and magnetization effect. The upper surface and the side surface of the upper clamping body 20 can be sprayed with a ceramic coating to increase the surface resistance and reduce the leakage current.

[0039] Of course, the present scheme should also be provided with a power module for powering the driving mechanism 50 and the monitoring control mechanism 60. For the monitoring control mechanism 60, an isolated DC-DC power module can be used to convert the externally input 24V DC power supply into 5V and 3.3V to power the circuit such as the sensor and the control module 63, ensuring the stability and anti-interference of the power supply. For the stepper motor, a separate 24V DC power supply can be used to meet the large current and power requirements required for motor driving. In addition, the power module can introduce an external DC power supply such as a battery, and can also take power from the field cable 70 for powering the device.

[0040] In addition, in order to facilitate the installation and disassembly of the butt joint device, a control button can be provided on the butt joint device, or a wireless remote control can be provided, which is in communication connection with the control module 63. In this way, when installing or disassembling the butt joint device, the stepper motor can be controlled by the remote control to loosen or clamp the cable 70 to be clamped, thereby achieving the installation and disassembly of the butt joint device.

[0041] The modules or units in the device of the embodiments of the present application can be combined, divided, and deleted according to actual needs. The above disclosure is only the preferred embodiments of the present application, and of course cannot limit the scope of the rights of the present application, and those skilled in the art can understand that the implementation of all or part of the above-mentioned embodiments, and the equivalent changes made according to the claims of the present application, still belong to the scope covered by the present application.

Claims

1. A connecting device with dynamic clamping force adjustment function, characterized in that, The device includes: a lower clamping body, an upper clamping body, a fixed housing, a transmission mechanism, a drive mechanism, and a monitoring and control mechanism. The upper surface of the lower clamping body is provided with N first arc-shaped grooves. At least one upper clamping body is located above the lower clamping body. Each upper clamping body includes N second arc-shaped grooves, each corresponding to a first arc-shaped groove on the lower clamping body, for clamping the cable through the second arc-shaped grooves of the upper clamping body and the first arc-shaped grooves of the lower clamping body. The fixed housing is located above the upper clamping body and is fixedly connected to the lower clamping body. A drive mechanism is installed on the fixed housing, and the transmission mechanism is located inside the fixed housing. One end of the transmission mechanism is connected to the upper clamping body, and the other end is connected to the drive end of the drive mechanism, so that the drive mechanism drives the upper clamping body to move closer to or further away from the lower clamping body, adjusting the clamping force on the cable. Wherein, N≥1. The monitoring and control mechanism is electrically connected to the drive mechanism. The monitoring and control mechanism is used to detect the clamping force of the upper and lower clamping bodies on the cable, as well as the thermal field distribution on the upper and lower clamping bodies, and to control the drive mechanism to work based on the monitoring results of the clamping force and thermal field distribution, so as to dynamically adjust the clamping force on the cable.

2. The connecting device with dynamic clamping force adjustment function according to claim 1, characterized in that, The upper surface of the lower clamping body is provided with two first arc-shaped grooves; the upper clamping body includes two, and is arranged sequentially along the axial direction of the lower clamping body; the lower surface of each of the two upper clamping bodies includes two second arc-shaped grooves; a rectangular groove is provided on the outer side of each of the two upper clamping bodies, and a rectangular protrusion is provided on the lower surface of the fixing housing corresponding to the position of the rectangular groove, which can be inserted into the rectangular groove for locking; the first bolt on the fixing housing passes through the rectangular protrusion and is fixedly connected to the lower clamping body.

3. The connecting device with dynamic clamping force adjustment function according to claim 2, characterized in that, There is a gap between the two upper clamping bodies, the driving mechanism is disposed at the gap, and the upper surface of the driving mechanism is fixedly connected to the lower surface of the fixed housing. The driving end of the driving mechanism extends into the interior of the fixed housing and is driven and connected to the transmission mechanism.

4. The connecting device with dynamic clamping force adjustment function according to claim 2, characterized in that, The transmission mechanism includes a drive gear and two sets of transmission components disposed inside the fixed housing. The drive gear is connected to the drive end of the drive mechanism in a manner that drives the drive gear to rotate. The two sets of transmission components are symmetrically arranged on both sides of the drive gear and are used to drive the two upper clamping bodies by the drive mechanism respectively. Each set of transmission components includes: a first gear, a second gear, and a bearing. The first gear is meshed with the drive gear, and the second gear is meshed with the first gear. The lower surface of the second gear is fixedly connected to the upper surface of the inner ring of the bearing, and the lower surface of the outer ring of the bearing is fixedly connected to the bottom surface of the fixed housing. A threaded through hole is provided on the upper clamping body. The upper end of the second bolt is fixedly connected to the lower surface of the second gear, and the other end passes through the central through hole of the bearing and extends into the threaded through hole of the upper clamping body. The second bolt is threadedly engaged with the threaded through hole.

5. The connecting device with dynamic clamping force adjustment function according to claim 4, characterized in that, The monitoring and control mechanism includes a pressure sensor, a temperature sensor, and a control module. The pressure sensor, temperature sensor, and drive mechanism are all electrically connected to the control module mounted on the fixed housing. The pressure sensor is located in the second arc-shaped groove of the upper clamping body and is used to monitor the clamping force of the upper and lower clamping bodies on the cable, sending the clamping force monitoring results to the control module. The temperature sensor is located on the upper or lower clamping body and is used to monitor the temperature on the clamping body, sending the temperature monitoring results to the control module. The control module controls the drive mechanism to operate based on the uploaded clamping force monitoring results and temperature monitoring results, thereby adjusting the clamping force on the cable.

6. The connecting device with dynamic clamping force adjustment function according to claim 5, characterized in that, The control module is used to determine whether the uploaded clamping force monitoring result is between the preset clamping force upper limit and clamping force lower limit; if the clamping force monitoring result is less than or equal to the clamping force lower limit, the drive mechanism is controlled to operate in the forward direction, driving the upper clamping body to move downward, increasing the clamping force on the cable. If the clamping force monitoring result is greater than or equal to the upper limit of clamping force, the drive mechanism is controlled to reverse the operation, driving the upper clamping body to move upward and reducing the clamping force on the cable.

7. The connecting device with dynamic clamping force adjustment function according to claim 6, characterized in that, The control module is also used to determine whether the uploaded temperature monitoring result is greater than a preset temperature threshold when the clamping force monitoring result is between the preset clamping force upper limit and the clamping force lower limit; if the temperature monitoring result is greater than the preset temperature threshold, the drive mechanism is controlled to reverse the operation to reduce the clamping force on the cable within the range of the clamping force upper limit and the clamping force lower limit. If the temperature monitoring result is less than the preset temperature threshold, the drive mechanism is controlled to operate in the forward direction to increase the clamping force on the cable within the range of the upper and lower limits of the clamping force.

8. The connecting device with dynamic clamping force adjustment function according to claim 5, characterized in that, Both the drive mechanism and the control module are equipped with an isolation shell. Both the isolation shell and the fixed shell are made of electrically insulating materials, and both the isolation shell and the fixed shell have a non-magnetic metal layer inside to reduce the influence of external electromagnetic fields on the electronic components of the drive mechanism and the control module.

9. The connecting device with dynamic clamping force adjustment function according to claim 5, characterized in that, The second bolt, the first gear, the second gear, and the bearing are all made of ceramic or polytetrafluoroethylene.

10. The connecting device with dynamic clamping force adjustment function according to claim 5, characterized in that, The upper surface and sides of the upper clamping body are coated with a ceramic coating.

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