Transmission cable and sensor positioning structure for a transmission cable

Abstract

The utility model relates to sensor technical field especially relates to a transmission cable, it includes cable, cable pipe, first pair of plug -in and inner joint, the cable pipe surrounds in the cable outside, first pair of plug -in connects in one end of the cable, just the first pair of plug -in on the end away from the cable is provided with first circumferential positioning structure, the inner joint connects in one end of the cable pipe, and is located the outside of first pair of plug -in, the inner joint on the end away from the cable pipe is provided with second circumferential positioning structure. Meanwhile, a kind of positioning structure of sensor and transmission cable is also provided. Compared with prior art, the transmission cable and the positioning structure of sensor and transmission cable of the utility model can better avoid the pin position connection error between transmission cable and sensor.

Description

Technical Field

[0001] This utility model relates to the field of sensor technology, and in particular to a transmission cable and a positioning structure for the sensor and the transmission cable. Background Technology

[0002] Sensors, as monitoring devices, are widely used in various fields. For example, liquid level sensors are used in the metallurgical industry to monitor the height of molten steel in a smelting furnace, thus facilitating subsequent operations. A transmission cable is connected to the end of the sensor to transmit signals between the liquid level sensor and external devices.

[0003] Interlocking structures are provided at the ends of the sensor and the transmission cable. For example, a pin core is provided at the tail end of the sensor, and a socket core is provided at the head end of the transmission cable. When the sensor and the transmission cable are connected, the pin on the pin core is inserted into the socket on the socket core, thereby realizing the connection between the sensor and the cable and enabling signal transmission.

[0004] However, in existing technologies, the transmission cable lacks a circumferential positioning structure. Operators connect the sensor and the transmission cable by visually observing the positions of the pins and sockets. Since the pins and sockets are typically located inside the sensor and transmission cable, the operator's view is obstructed during connection, making it easy for visual errors or operational mistakes to lead to incorrect connections, resulting in signal transmission interruptions or equipment damage. This is especially true when the transmission cable is a multi-core cable, with multiple sockets at one end and multiple pins at the other end of the sensor. The pins and sockets correspond one-to-one, making connection errors even more pronounced when connecting this type of sensor and transmission cable. Utility Model Content

[0005] To address the technical problem in existing technologies where connection errors between transmission cables and sensors are easily caused by human factors, this invention provides a transmission cable with a connector at one end and a first circumferential positioning structure at the end of the connector. An inner connector is located outside the connector, and a second circumferential positioning structure is located at the end of the inner connector. When the transmission cable is connected to the sensor, the first and second circumferential positioning structures cooperate with corresponding structures on the sensor to achieve circumferential positioning, thus better preventing connection errors caused by human factors.

[0006] A transmission cable includes a cable, a cable conduit, a first pair of plugs, and an inner connector;

[0007] The cable conduit surrounds the outside of the cable;

[0008] The first pair of plugs is connected to one end of the cable, and a first circumferential positioning structure is provided on the end of the first pair of plugs away from the cable;

[0009] The inner connector is connected to one end of the cable conduit and is located outside the first pair of plugs; a second circumferential positioning structure is provided on the end of the inner connector away from the cable conduit.

[0010] Preferably, the second circumferential positioning structure is a positioning notch formed at the end of the inner connector.

[0011] Preferably, the first circumferential positioning structure is a positioning boss formed on the outer peripheral surface of the first pair of plugs.

[0012] Preferably, the inner connector is provided with a positioning pin, and the outer peripheral surface of the first pair of plugs is provided with a positioning groove that matches the positioning pin, and the positioning pin is inserted into the positioning groove.

[0013] Preferably, it further includes a cable clamping sleeve, which is disposed at one end of the cable and clamped between the cable and the inner connector.

[0014] Preferably, the cable clamping sleeve includes a base and clamping plates;

[0015] The clamping piece is provided in multiple pieces, and each clamping piece is arranged in a ring on the base body, with adjacent clamping pieces spaced apart from each other;

[0016] Each of the clamps is inserted between the cable and the inner connector, with the inner surface of the clamp abutting against the outer peripheral surface of the cable and the outer surface of the clamp abutting against the inner peripheral surface of the inner connector.

[0017] A positioning structure for a sensor and a transmission cable, comprising a sensor and a transmission cable as described in any one of the above descriptions;

[0018] One end of the sensor is provided with a connecting connector and a second pair of plugs, and a positioning mark is provided on the outer periphery of one end of the sensor corresponding to the second circumferential positioning structure, and a third circumferential positioning structure is provided on the second pair of plugs corresponding to the first circumferential positioning structure.

[0019] The connecting connector is connected to the inner connector, and the second pair of plugs is connected to the first pair of plugs.

[0020] Preferably, one end of the sensor is further provided with a safety pin, which is inserted into the second circumferential positioning structure.

[0021] Preferably, the ends of the second pair of plugs are provided with connecting rings, and the third circumferential positioning structure is a positioning groove formed inside the connecting ring, into which the first circumferential positioning structure is inserted.

[0022] Preferably, the transmission cable further includes a union nut, which is threadedly connected to the connecting joint to secure the sensor to the transmission cable;

[0023] A sealing ring is also provided between the connecting joint and the inner joint.

[0024] Compared with existing technologies, this utility model provides a transmission cable including a cable, a cable conduit, a first pair of plugs, and an inner connector. The cable conduit surrounds the cable. The first pair of plugs is connected to one end of the cable, and a first circumferential positioning structure is provided on the end of the first pair of plugs away from the cable. The inner connector is connected to one end of the cable conduit and is located outside the first pair of plugs. A second circumferential positioning structure is provided on the end of the inner connector away from the cable conduit. The transmission cable has the first circumferential positioning structure on the first pair of plugs, so when docking with a sensor, the corresponding positioning structure on the sensor needs to be aligned with the first circumferential positioning structure to connect the transmission cable to the sensor. This better avoids connection errors caused by human error, preventing signal interruption or equipment damage. Furthermore, the inner connector also has a second circumferential positioning structure. Since the inner connector is located outside the first pair of plugs, when the operator docks the transmission cable with the sensor, the position of the second circumferential positioning structure and the corresponding structure on the sensor can be observed more intuitively. This not only avoids operator error but also improves the docking and assembly efficiency of the transmission cable and sensor. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 A three-dimensional structural diagram of a transmission cable provided in one embodiment;

[0027] Figure 2 A partial cross-sectional structural diagram of a transmission cable provided in one embodiment;

[0028] Figure 3A schematic diagram of the end face structure of a transmission cable provided in one embodiment;

[0029] Figure 4 for Figure 2 A magnified view of region I shown;

[0030] Figure 5 A three-dimensional structural schematic diagram of an internal connector provided in one embodiment;

[0031] Figure 6 A three-dimensional structural schematic diagram of a cable clamping sleeve provided in one embodiment;

[0032] Figure 7 A three-dimensional structural schematic diagram of a sensor provided in one embodiment;

[0033] Figure 8 A partial cross-sectional structural diagram of a sensor provided in one embodiment;

[0034] Figure 9 A schematic diagram of the end face structure of a sensor provided in one embodiment;

[0035] Figure 10 A three-dimensional structural diagram of the sensor connected to the transmission cable according to one embodiment;

[0036] Figure 11 This is a partial cross-sectional structural diagram of a sensor connected to a transmission cable according to one embodiment.

[0037] Figure 12 for Figure 11 A magnified view of a portion of region II shown;

[0038] Explanation of reference numerals in the attached figures:

[0039] Transmission cable 100, cable 10, cable conduit 20, first pair of plugs 30, first circumferential positioning structure 31, positioning groove 32, stepped surface 33, insertion hole 34, inner connector 40, second circumferential positioning structure 41, positioning pin 42, first conical surface 43, sealing ring groove 44, boss 45, cable clamping sleeve 50, seat 51, clamping piece 52, union nut 60, extension wall 61, elastic element 70, limiting element 80, limiting pin 81, sealing ring 90;

[0040] Sensor 200, connector 210, second conical surface 2101, second pair of plugs 220, third circumferential positioning structure 2201, connecting ring 2202, positioning mark 230, safety pin 240. Detailed Implementation

[0041] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0042] It should be noted that when a component is referred to as being "fixed to", "mounted to", or "set on" another component, it can be directly on or indirectly set on the other component; when a component is "connected" to another component, or a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to the other component.

[0043] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0044] 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 one or more of that feature. In the description of this application, "a plurality of" or "several" means two or more, unless otherwise explicitly specified.

[0045] It should be noted that the structures, proportions, sizes, etc., shown in the accompanying drawings are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which this application can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size should still fall within the scope of the technical content disclosed in this application, provided that they do not affect the effects and purposes that this application can produce.

[0046] This utility model provides a transmission cable, comprising a cable, a cable conduit, a first pair of plugs, and an inner connector. The cable conduit surrounds the cable. The first pair of plugs is connected to one end of the cable, and a first circumferential positioning structure is provided at the end of the first pair of plugs away from the cable. The inner connector is connected to one end of the cable conduit and is located outside the first pair of plugs. A second circumferential positioning structure is provided at the end of the inner connector away from the cable conduit. The transmission cable has the first circumferential positioning structure on the first pair of plugs, so when docking with a sensor, the corresponding positioning structure on the sensor must be aligned with the first circumferential positioning structure to connect the transmission cable to the sensor. This better avoids connection errors caused by human error, preventing signal interruption or equipment damage. Furthermore, the inner connector also has a second circumferential positioning structure. Since the inner connector is located outside the first pair of plugs, when the operator docks the transmission cable with the sensor, the position of the second circumferential positioning structure and the corresponding structure on the sensor can be more intuitively observed. This not only avoids operator error but also improves the docking and assembly efficiency of the transmission cable and sensor.

[0047] Please refer to the following: Figures 1 to 6 In one embodiment, a transmission cable 100 is provided, specifically for connecting to a sensor, and is a sensor transmission cable. More specifically, in one embodiment, the transmission cable 100 is used in the metallurgical industry and is a transmission cable suitable for high-temperature and high-vibration environments, especially for signal transmission between molten steel level sensors and external equipment.

[0048] The transmission cable 100 includes a cable 10, a cable conduit 20, a first pair of plugs 30, and an inner connector 40. The cable conduit 20 surrounds the cable 10, providing good protection for it. The first pair of plugs 30 is connected to one end of the cable 10. The first pair of plugs 30 is mainly used to mate with plugs on the sensor, establishing a connection between the sensor and the cable 10, thereby enabling sensor signal transmission. A first circumferential positioning structure 31 is provided at the end of the first pair of plugs 30 furthest from the cable 10. By providing the first circumferential positioning structure 31 on the first pair of plugs 30, the first pair of plugs 30 can cooperate with the positioning structure on the sensor's plugs to achieve circumferential positioning, avoiding incorrect circumferential connection between the two pairs of plugs. The circumferential positioning structure can be any structural form such as a slot, notch, or boss, as long as it can be adapted to the corresponding structure on the sensor. For example, when the circumferential positioning structure on the transmission cable is a groove, the corresponding circumferential positioning structure on the sensor can be a boss. By the cooperation between the boss and the groove opened at the same position in the circumferential direction, the circumferential positioning of the sensor and the transmission cable can be achieved.

[0049] The inner connector 40 is connected to one end of the cable conduit 20 and is located outside the first pair of plugs 30. A second circumferential positioning structure 41 is provided on the end of the inner connector 40 away from the cable conduit 20. In this embodiment, "outer" refers to the circumferential periphery of a component, for example, such as... Figure 4 As shown, the inner connector 40 being located outside the first pair of plugs 30 means that the inner connector 40 is at least partially disposed on the circumferential periphery of the first pair of plugs 30, and the first pair of plugs 30 is disposed on the inner side of the inner connector 40.

[0050] Understandably, current technology lacks circumferential positioning structures on transmission cables and sensors. When connecting transmission cables and sensors, circumferential alignment relies solely on manual operation. Operators visually observe the positions of pins and sockets to achieve the connection and installation of the transmission cable and sensor. This is prone to connection errors due to visual errors or operational mistakes, which can easily lead to signal transmission interruptions or equipment damage.

[0051] In this embodiment, the transmission cable 100 has a first circumferential positioning structure 31 on the first pair of plug-in 30s. Therefore, when the transmission cable 100 is connected to the sensor, if the corresponding structure on the sensor is not aligned with the first circumferential positioning structure 31, the first circumferential positioning structure 31 will obstruct the normal connection of the first pair of plug-in 30s, thus avoiding connection errors due to human error. Furthermore, since the first pair of plug-in 30s are located internally, the position of the first circumferential positioning structure 31 is not easily observed by the operator during the connection process. In this embodiment, a second circumferential positioning structure 41 is also provided at the inner connector 40, since the inner connector 40 is located externally.

[0052] This allows for a more intuitive observation of the position of the second circumferential positioning structure 41 during docking, which not only avoids operator errors but also improves the docking and assembly efficiency of the transmission cable 100 and the sensor.

[0053] Preferably, in one embodiment, the second circumferential positioning structure 41 is a positioning notch formed at the end of the inner connector 40. By setting the second circumferential positioning structure 41 as a notch structure, firstly, the processing difficulty can be reduced; secondly, it is easier for operators to observe the position of the second circumferential positioning structure 41 on the inner connector 40 more clearly and intuitively; and thirdly, it can also prevent the second circumferential positioning structure 41 from affecting the docking of the inner connector 40 with the corresponding structure on the sensor.

[0054] Preferably, in one embodiment, the first circumferential positioning structure 31 is a positioning boss formed on the outer peripheral surface of the first pair of plug-in 30. By forming the first circumferential positioning structure 31 on the outer peripheral surface of the first pair of plug-in 30, the first circumferential positioning structure 31 can be prevented from affecting the normal connection between the first pair of plug-in 30 and the plug-in on the sensor.

[0055] Preferably, in one embodiment, the inner connector 40 is provided with a positioning pin 42, and the outer peripheral surface of the first pair of plug-in 30 is provided with a positioning groove 32 that matches the positioning pin 42, and the positioning pin 42 is inserted into the positioning groove 32. The positioning pin 42 makes the positioning between the first pair of plug-in 30 and the inner connector 40 more reliable, ensuring the accuracy of the circumferential position of the first pair of plug-in 30.

[0056] Specifically, in one embodiment, the first pair of plug-in 30 can be fixed in the transmission cable 100 by means of threaded connection, and the inner connector 40 can be provided with a pin hole corresponding to the position of the positioning pin 42. The pin hole and the positioning pin 42 are interference fit. After the first pair of plug-in 30 is installed, the positioning groove 32 is aligned with the pin hole, and then the positioning pin 42 is inserted into the pin hole and the positioning groove 32 to achieve circumferential positioning.

[0057] Understandably, current technologies typically use adhesive or heat shrink tubing to secure the cable to its internal shielding layer. However, under prolonged high temperatures, the adhesive layer can easily become brittle and detach, leading to cable loosening and insufficient cable fixation. Furthermore, the direct, rigid connection between the cable and the connector is prone to loosening under mechanical vibration or external pulling, causing poor contact in the core wires, signal fluctuations, or even signal interruption.

[0058] Preferably, in one embodiment, the transmission cable 100 further includes a cable clamping sleeve 50, which is disposed at one end of the cable 10 and clamped between the cable 10 and the inner connector 40. The cable clamping sleeve 50 presses the cable 10 against the inner shielding layer of the cable, ensuring that there is no tensile force between the core wire and the pin, thus ensuring stable signal transmission.

[0059] Specifically, in one embodiment, the cable clamp sleeve 50 is arranged in the position area between the first pair of plugs 30 and the end of the cable conduit 20.

[0060] Preferably, in one embodiment, the cable clamping sleeve 50 includes a base 51 and clamping pieces 52. Multiple clamping pieces 52 are provided, arranged in a ring on the base 51, with adjacent clamping pieces 52 spaced apart. Each clamping piece 52 is inserted between the cable 10 and the inner connector 40. The inner surface of the clamping piece 52 abuts against the outer peripheral surface of the cable 10, and the outer surface of the clamping piece 52 abuts against the inner peripheral surface of the inner connector 40. That is, in this embodiment, the portion of the cable clamping sleeve 50 used to clamp the cable 10 is not a single, integral ring structure, but a split ring structure. By providing multiple split clamping pieces 52, deformation of the clamping pieces 52 during insertion is facilitated, improving the clamping effect of the cable clamping sleeve 50 on the cable 10. The thickness of the clamp 52 is less than the gap between the inner connector 40 and the cable 10. The clamp 52 clamps the cable 10 in an interference fit manner. The clamp 52 is squeezed by the inner connector 40 to improve the clamping effect of the clamp 52.

[0061] More preferably, in one embodiment, the inner and / or outer surfaces of the clamping piece 52 may be tapered, so that when the cable clamping sleeve 50 is inserted into the cable 10, the clamping force of the clamping piece 52 on the cable 10 can be gradually increased as the cable clamping sleeve 50 is pushed in.

[0062] More preferably, in one embodiment, the connector at the tail end of the first pair of plugs 30 is provided with a receiving groove corresponding to the cable clamp sleeve 50, the seat body 51 is located in the receiving groove, and the stepped surface 33 of the receiving groove abuts against the seat body 51, thereby better restricting the position of the cable clamp sleeve 50 and facilitating the installation of the cable clamp sleeve 50.

[0063] Preferably, in one embodiment, the inner connector 40 is clamped to one end of the cable conduit 20. That is, in this embodiment, the inner connector 40 is specifically connected to the cable conduit 20 by clamping, thereby improving the stability of the connection.

[0064] Preferably, in one embodiment, the cable 10 is a multi-core cable, and the first pair of plugs 30 are plug cores with multiple sockets 34. Correspondingly, the sensor is provided with a pin core. When the transmission cable 100 is connected to the sensor, the pins on the sensor's pin core are inserted into the corresponding sockets 33, so that the pins and sockets 33 correspond one-to-one, thereby realizing the connection between the sensor and the cable 10.

[0065] Specifically, in one embodiment, the cable conduit 20 is a high-pressure hose.

[0066] In existing technologies, cables and connectors are integral structures, making modular replacement difficult. Local damage requires replacing the entire transmission cable, which is costly and wasteful of resources.

[0067] In one embodiment, the transmission cable 100 adopts a modular design, which enables modular maintenance. Damaged parts can be replaced as needed, reducing maintenance costs and further reducing maintenance time.

[0068] Please refer to the following: Figures 1 to 12In one embodiment, a positioning structure for a sensor and a transmission cable is also provided, comprising a sensor 200 and the transmission cable 100. One end of the sensor 200 is provided with a connector 210 and a second pair of plugs 220. A positioning mark 230 is provided on the outer periphery of one end of the sensor 200 corresponding to the second circumferential positioning structure 41. The second pair of plugs 220 is provided with a third circumferential positioning structure 2201 corresponding to the first circumferential positioning structure 31. The connector 210 is connected to the inner connector 40, and the second pair of plugs 220 is connected to the first pair of plugs 30. When docking the sensor 200 and the transmission cable 100, the operator can first observe the position of the positioning mark 230 and the second circumferential positioning structure 41. After aligning the positioning mark 230 with the second circumferential positioning structure 41, the sensor 200 and the transmission cable 100 can be docked, such that the second pair of plugs 220 is inserted into the first pair of plugs 30, and the first circumferential positioning structure 31 is inserted into the third circumferential positioning structure 2201. In other words, the positioning mark 230 and the second circumferential positioning structure 41 can play an auxiliary positioning role, allowing operators to more intuitively judge the circumferential position of the transmission cable 100 and the sensor 200 through visual means, which facilitates the alignment of the first circumferential positioning structure 31 and the third circumferential positioning structure 2201 and improves the docking and assembly efficiency.

[0069] Preferably, in one embodiment, a safety pin 240 is further provided at one end of the sensor 200, and the safety pin 240 is inserted into the second circumferential positioning structure 41. The safety pin 240 serves both a positioning function and prevents accidental rotation between the sensor 200 and the transmission cable 100 after they are connected, thus improving the stability of the connection.

[0070] Specifically, in one embodiment, the end of the second pair of plugs 220 is provided with a connecting ring 2202, the third circumferential positioning structure 2201 is a positioning groove opened on the inner side of the connecting ring 2202, and the first circumferential positioning structure 41 is a positioning boss, which is inserted into the positioning groove.

[0071] Specifically, in one embodiment, the positioning mark 230 is a recessed hole formed on the outer peripheral surface of the sensor 200.

[0072] Understandably, in existing technologies, cable connectors are usually connected to sensors using multiple bolts. This process is complex, requires specialized tools, and is time-consuming to disassemble and assemble. Furthermore, bolts are prone to corrosion in high-temperature environments, which further increases the difficulty of disassembly and assembly, making it difficult to meet the needs of metallurgical sites for rapid equipment maintenance.

[0073] Preferably, in one embodiment, the transmission cable 100 further includes a union nut 60, which is threadedly connected to the connector 210 to secure the sensor 200 to the transmission cable 100. The union nut 60, also known as a union, is a threaded connector that simplifies connection and facilitates disassembly and replacement, significantly reducing connection costs. Using the union nut 60 to thread the sensor 200 makes assembly and disassembly more convenient, enabling rapid disassembly and reducing time consumption, thus meeting the need for rapid equipment maintenance. This allows the transmission cable 100 to meet the metallurgical industry's requirements for efficient, reliable, and low-cost maintenance. Specifically, in one embodiment, the connector 210 has a second thread on its outer periphery, which matches the first thread on the inner periphery of the union nut 60. The threaded connection between the connector 210 and the union nut 60 is achieved through the engagement of the second thread and the first thread.

[0074] Preferably, in one embodiment, the tail end of the swivel nut 60 is connected to an elastic element 70. In this application, "head end" and "tail end" refer to two opposite end regions of a component. After the transmission cable 100 is connected to the sensor, the head end is the end of the component relatively closer to the sensor, and the tail end is the end of the component relatively farther from the sensor. The elastic element 70 is a component that can undergo elastic deformation under force and return to its initial state after the force is reduced or eliminated. After the transmission cable 100 is connected to the sensor, because the tail end of the swivel nut 60 is provided with the elastic element 70, the elastic element 70 can continuously apply force to the swivel nut 60, preventing the swivel nut 60 from retracting and thus preventing loosening, improving the connection reliability between the transmission cable 100 and the sensor. Furthermore, when installing the transmission cable 100 and the sensor, the swivel nut 60 can also retract to a certain extent after being subjected to force, making it easier for the sensor to be inserted into the transmission cable 100 and reducing installation difficulty.

[0075] Specifically, in one embodiment, the elastic element 70 is a spring.

[0076] Preferably, in one embodiment, the transmission cable 100 further includes a limiting member 80, and the elastic member 70 is connected between the limiting member 80 and the union nut 60. The limiting member 80 is provided with a limiting pin 81, which is used to limit the position of the limiting member 80. The limiting pin 81 is mainly used to fasten the limiting member 80 to other components, thereby limiting the position of the limiting member 80, and consequently limiting the position of one end of the elastic member 70, ensuring that the elastic member 70 can continuously apply force to the union nut 60, preventing the union nut 60 from loosening. The specific component to which the limiting pin 81 is connected can be selected according to actual needs, as long as it can effectively fix the position of the limiting member 80. For example, the limiting pin 81 can be connected to the frame of any equipment to fix the position of the limiting member 80.

[0077] Specifically, in one embodiment, the limiting pin 81 is a pin.

[0078] Specifically, in one embodiment, the limiting member 80 is a hollow sleeve structure and is sleeved on the outside of the cable pipe 20.

[0079] Preferably, in one embodiment, the outer peripheral surface of the inner connector 40 is provided with a protrusion 45 protruding outward, and the tail end of the swivel nut 60 is provided with an extension wall 61 extending inward. The protrusion 45 and the extension wall 61 abut against each other, thereby restricting the position of the swivel nut 60 and the inner connector 40 through the mutual abutment and engagement of the protrusion 45 and the extension wall 61, preventing the transmission cable 100 from loosening, and further reducing the difficulty of disassembly and assembly. For example, as Figure 4 As shown, the elastic element 70 can apply a rightward force to the union nut 60, while the boss 45 can correspondingly block the union nut 60, restricting its position. Simultaneously, the extension wall 61 can also block the boss 45, restricting the position of the inner connector 40. Furthermore, the contact between the boss 45 and the extension wall 61 also provides a certain sealing effect, improving the sealing performance.

[0080] Preferably, in one embodiment, a sealing ring 90 is further provided between the connecting joint 210 and the inner joint 40.

[0081] More preferably, in one embodiment, the outer peripheral surface of the inner connector 40 is provided with a first conical surface 43, and a sealing ring groove 44 is provided on the first conical surface 43. The sealing ring 90 is disposed in the sealing ring groove 44, and the sealing ring 90 extends out of the sealing ring groove 44. That is, the thickness of the sealing ring 90 needs to be greater than the recess depth of the sealing ring groove 44, so that after the sealing ring 90 is installed in the sealing ring groove 44, a portion of the sealing ring 90 is exposed. The inner peripheral surface of the connecting connector 210 is provided with a second conical surface 2101 that matches the first conical surface 43. The second conical surface 2101 cooperates with the first conical surface 43 to press the sealing ring 90 tightly. The cooperation between the second conical surface 2101 and the first conical surface 43 forms a tighter contact structure. The inclined surface extrusion generates greater contact pressure on the sealing ring 90, effectively filling the gaps in the contact surfaces, ensuring the pre-compression of the sealing ring 90, guaranteeing sealing performance, and improving the life of the sealing ring.

[0082] Specifically, in one embodiment, the first tapered surface 43 is an outwardly expanding tapered surface from the end of the transmission cable 100 inwardly; the second tapered surface 2101 is an inwardly contracting tapered surface from the end of the sensor 200 inwardly, thereby further reducing the difficulty of mating the sensor 200 with the transmission cable 100. Figure 12 As shown, the first conical surface 43 is a gradually expanding conical structure from the direction close to the sensor 200 to the direction away from the sensor 200 (from left to right), and the second conical surface 2101 is a gradually contracting conical structure from the direction close to the transmission cable 100 to the direction away from the transmission cable 100 (from right to left).

[0083] Specifically, in one embodiment, the sensor 200 is a liquid level sensor. More specifically, in one embodiment, the sensor 200 is a liquid level sensor used in the metallurgical industry to detect molten steel in a smelting furnace.

[0084] Specifically, in one embodiment, the second pair of plugs 220 is a pin core with multiple pins.

[0085] The positioning structure of the sensor and transmission cable ensures that the multi-core pins correspond one-to-one with the sockets, enabling precise positioning and preventing misoperation. Furthermore, the sensor 200 is connected via the live connector nut 60, the sealing ring 90, and the inner connector 40, allowing for both sealing and quick installation and disassembly, thereby improving metallurgical production efficiency and equipment reliability.

[0086] In addition, existing technologies rely on a single sealing ring and do not consider the differences in thermal expansion under high-temperature environments, resulting in insufficient sealing reliability.

[0087] In the positioning structure of the sensor and transmission cable provided in this embodiment, not only does the sealing ring 90 have a sealing function, but the live joint nut 60 and the connecting joint 210, as well as the connecting joint 210 and the inner joint 40, also have a sealing function, achieving multi-level sealing and a better sealing effect.

[0088] The above description is merely an embodiment of this utility model. It should be noted that those skilled in the art can make improvements without departing from the inventive concept of this utility model, but these improvements all fall within the protection scope of this utility model.

Claims

1. A transmission cable, characterized in that, Includes cable, cable conduit, first pair of plugs, and internal connector; The cable conduit surrounds the outside of the cable; The first pair of plugs is connected to one end of the cable, and a first circumferential positioning structure is provided on the end of the first pair of plugs away from the cable; The inner connector is connected to one end of the cable conduit and is located outside the first pair of plugs; a second circumferential positioning structure is provided on the end of the inner connector away from the cable conduit.

2. The transmission cable according to claim 1, characterized in that, The second circumferential positioning structure is a positioning notch opened at the end of the inner connector.

3. The transmission cable according to claim 1, characterized in that, The first circumferential positioning structure is a positioning boss formed on the outer peripheral surface of the first pair of plugs.

4. The transmission cable according to claim 1, characterized in that, The inner connector is provided with a positioning pin, and the outer peripheral surface of the first pair of plugs is provided with a positioning groove that matches the positioning pin, and the positioning pin is inserted into the positioning groove.

5. The transmission cable according to claim 1, characterized in that, It also includes a cable clamp sleeve, which is disposed at one end of the cable and clamped between the cable and the inner connector.

6. The transmission cable according to claim 5, characterized in that, The cable clamping sleeve includes a base and clamping plates; The clamping piece is provided in multiple pieces, and each clamping piece is distributed in a ring on the base body, with adjacent clamping pieces spaced apart from each other; Each of the clamps is inserted between the cable and the inner connector, with the inner surface of the clamp abutting against the outer peripheral surface of the cable and the outer surface of the clamp abutting against the inner peripheral surface of the inner connector.

7. A positioning structure for a sensor and a transmission cable, characterized in that, Includes a sensor and a transmission cable as described in any one of claims 1 to 6; One end of the sensor is provided with a connecting connector and a second pair of plugs, and a positioning mark is provided on the outer periphery of one end of the sensor corresponding to the second circumferential positioning structure, and a third circumferential positioning structure is provided on the second pair of plugs corresponding to the first circumferential positioning structure. The connecting connector is connected to the inner connector, and the second pair of plugs is connected to the first pair of plugs.

8. The positioning structure for the sensor and transmission cable according to claim 7, characterized in that, A safety pin is also provided at one end of the sensor, and the safety pin is inserted into the second circumferential positioning structure.

9. The positioning structure for the sensor and transmission cable according to claim 7, characterized in that, The second pair of plugs has a connecting ring at its end, and the third circumferential positioning structure is a positioning groove formed inside the connecting ring, into which the first circumferential positioning structure is inserted.

10. The positioning structure for the sensor and transmission cable according to claim 7, characterized in that, The transmission cable also includes a union nut, which is threadedly connected to the connecting joint to secure the sensor to the transmission cable; A sealing ring is also provided between the connecting joint and the inner joint.

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