CN209948134U - Universal branch watertight cable for underwater sensor - Google Patents

Abstract

The utility model discloses a universal branch watertight cable for an underwater sensor, in particular to the technical field of cables, including an RS485 communication bus, one end of the RS485 communication bus is connected with a cable general connector, and the surface of the RS485 communication bus is connected with an RS485 A communication branch line, one end of the RS485 communication branch line is connected with an RS232 to RS485 module, and a branch cable is connected externally to the RS232 to RS485 module. The utility model can convert the RS232 communication protocol using the underwater sensor into the RS485 communication protocol by using the RS232 to RS485 module, and replaces a plurality of watertight cables with a branch watertight cable, thereby reducing the volume and weight of the marine environment monitoring system, The number of data collector interfaces is reduced, and the combination and connection can be made according to the position and number of sensors to meet various ocean observation needs, which improves the scalability and versatility of the ocean observation system.

Description

A universal branch watertight cable for underwater sensors

technical field

The utility model relates to the technical field of cables, and more particularly, the utility model relates to a general branch watertight cable for underwater sensors.

Background technique

The commonly used underwater sensors in the existing marine environment monitoring system include temperature and salinity sensors, chlorophyll sensors, dissolved oxygen sensors, etc. These sensors generally use the RS232 communication protocol to complete data transmission. When using the RS232 communication protocol, each sensor needs to connect a watertight cable and a watertight connector to transmit the sensor data to the buoy. The buoy needs to be equipped with data acquisition units with the corresponding number of interfaces to complete the data acquisition work. In some cases where multiple underwater sensors are required to monitor together, the volume, weight, and size of the data collector of the observation system will increase exponentially according to the sensor data. Therefore, the volume, weight, and size of the system using the RS232 communication protocol are larger, the data collector is larger, and the scalability is poor.

The existing inductive coupling transmission method can solve this problem, but the cost of this method is high, the equipment of various manufacturers is not compatible, and the versatility and stability are poor.

Utility model content

In order to overcome the above-mentioned defects of the prior art, the embodiments of the present invention provide a general branch watertight cable for underwater sensors, which can convert the RS232 communication protocol using the underwater sensor into the RS485 communication protocol by using the RS232 to RS485 module. A branch watertight cable replaces multiple watertight cables, which reduces the volume and weight of the marine environment monitoring system, reduces the number of data collector interfaces, and can be combined and connected according to the position and number of sensors to meet various marine requirements. To meet the observation requirements, the scalability and versatility of the ocean observation system are improved, so as to solve the problems raised in the above background technology.

In order to achieve the above purpose, the utility model provides the following technical solutions: a general branch watertight cable for underwater sensors, comprising an RS485 communication bus, one end of the RS485 communication bus is connected with a cable connector, and the surface of the RS485 communication bus is connected with a RS485 communication branch line, one end of the RS485 communication branch line is connected with an RS232 to RS485 module, and a branch cable is externally connected to the RS232 to RS485 module;

The branch cable includes a four-core watertight twisted pair cable, the four-core watertight twisted pair cable includes a first cable and a second cable, and the first cable is communicated with the second cable, One end of the first cable is connected with a first four-core watertight female connector and the other end is connected with a first four-core watertight male connector, and one end of the second cable away from the first cable is connected with a second four-core watertight female connector head, the second four-core watertight female head is matched with the RS232 to RS485 module;

The number of the branch cables is provided in multiples, and a connecting cable is arranged between two adjacent branch cables. One end of the connecting cable is connected with a third four-core watertight female connector and the other end is connected with a second Four-core watertight male connector, the first four-core watertight male connector and the third four-core watertight female connector and the second four-core watertight male connector and the first four-core watertight female connector are all matched.

In a preferred embodiment, a fixing ring is provided at the center of the inner cavity of the first cable, the second cable and the connecting cable, and a support rod is provided on the outer wall of the circumferential side of the fixing ring, and the support rod Both ends are respectively fixedly connected with the fixing ring and the inner wall of the cable at the corresponding position.

In a preferred embodiment, the number of the struts is set to four, and the four struts are evenly distributed on the outer side wall of the fixing ring, and reinforcing bars are arranged between any two adjacent struts, and the four struts are Four threading areas are formed between the reinforcing rod and the four supporting rods, and a set of twisted pairs and two power lines are arranged inside the cable, and the twisted pairs and the power lines are sequentially arranged in the four threading areas, And packing layers are arranged between the twisted pair, the power line and the reinforcing rod, and between the reinforcing rod and the inner wall of the cable.

In a preferred embodiment, the twisted pair is used to transmit data, and the power cable is used to supply power for the RS232 to RS485 module.

In a preferred embodiment, a watertight mechanism is provided between the first four-core watertight male connector and the third four-core watertight female connector and between the second four-core watertight male connector and the first four-core watertight female connector , the watertight mechanism includes an annular insert plate and an annular slot, the annular insert is fixedly arranged at one end of the first four-core watertight female head and the third four-core watertight female head, and the annular slot is arranged in the first four-core watertight female head. At the positions corresponding to one end of the four-core watertight male head and the second four-core watertight male head, a sealing ring is provided on the end surface of the watertight female head corresponding to the outer side of the annular insert plate, and a sleeve is embedded on the end surface of the inner corresponding watertight female head The top of the sleeve rod is provided with an insertion hole vertically, the end surface of the watertight male head corresponding to the inner ring area of the annular slot is vertically provided with an insertion rod, and the annular slot is covered with a sealing gasket.

In a preferred embodiment, the top of the annular inserting plate is vertically provided with three concentrically arranged annular clamping plates, and the bottom end surface of the inner cavity of the annular slot is correspondingly provided with three concentrically arranged annular clamping slots. The annular card slot is matched with the annular card plate.

In a preferred embodiment, a base plate is fixed at the bottom of the sleeve rod, a spring is sleeved inside the socket corresponding to the top of the base plate, a contact piece is fixedly connected to the top of the spring, and the bottom end is fixedly connected to the base plate, And the spring is made of copper material, the length of the insertion rod is less than the depth of the jack, and is greater than the distance from the contact piece to the lowest point of the spring to the top of the jack in a natural state.

In a preferred embodiment, the bottom end of the annular plug-in plate is provided with a flared end, the top of the annular slot is provided with a flared slot correspondingly, and the flared end is matched with the flared slot.

Technical effects and advantages of the present utility model:

1. The utility model adopts RS232 to RS485 module to convert the RS232 communication protocol of the underwater sensor into the RS485 communication protocol, and replaces a plurality of watertight cables with a branch watertight cable, which reduces the volume and weight of the marine environment monitoring system. , which reduces the number of data collector interfaces, and can be combined and connected according to the position and number of sensors to meet various ocean observation needs, improving the scalability and versatility of the ocean observation system;

2. The present utility model inserts the annular insert at one end of the first four-core watertight female head and the third four-core watertight female head into the annular slot at one end of the second four-core watertight male head and the first four-core watertight male head, respectively. Inside, use the sealing ring set on the end face of the watertight female head corresponding to the outer side of the annular plug plate to carry out the first sealing, and then use the sealing gasket covered by the inner wall of the annular slot to carry out the secondary sealing. There are three concentric annular clamping plates, and three concentric annular clamping grooves are correspondingly arranged on the bottom end face of the inner cavity of the annular slot, and the gasket in the annular clamping groove is in an interference fit with the annular clamping plate. Further increase the watertight performance of the secondary seal, thereby greatly improving the watertightness of the branch watertight cable under water, thereby ensuring the working stability of the ocean observation system, and the top of the annular groove can be set into a flared groove, which can greatly improve The insertion accuracy of the ring insert can reduce the alignment time, thereby improving the installation efficiency, and the flared end of the bottom end of the ring insert can be completely matched with the flare groove, which can greatly reduce the accumulation of water in the flare groove, thereby improving the water tightness. The watertightness of the connection between the male head and the watertight female head;

3. The utility model inserts the insertion rod at the end of the watertight female head into the corresponding jack at the end of the watertight male head, because the length of the insertion rod is less than the depth of the jack, and is larger than the contact piece of the spring in a natural state. The distance from the lowest point to the top of the jack is such that when the insertion rod is completely inserted into the jack, the contact piece is tightly fitted with the end face of the insertion rod under the action of the restoring force of the spring to avoid poor contact during use, and the spring is Made of copper material, it can greatly improve the stability of signal conduction.

Description of drawings

FIG. 1 is a schematic diagram of the overall structure of the present invention.

FIG. 2 is a schematic diagram of the overall structure of the present invention when a plurality of branch cables are connected.

3 is a schematic structural diagram of a branch cable of the present invention.

4 is a cross-sectional view of a cable of the present invention.

FIG. 5 is a schematic structural diagram of the watertight male head of the present invention.

6 is a schematic structural diagram of the watertight female head of the present invention.

7 is a cross-sectional view of the watertight female head of the present invention.

FIG. 8 is an enlarged view of part A in FIG. 7 of the present invention.

9 is a partial cross-sectional view of the watertight female head of the present invention.

The reference signs are: 1 RS485 communication bus, 2 cable connector, 3 RS485 communication branch line, 4 RS232 to RS485 module, 5 branch cable, 51 four-core watertight twisted pair cable, 52 first four-core watertight female head, 53 the first four-core watertight male head, 54 the second four-core watertight female head, 6 annular card slot, 7 connecting cable, 8 the third four-core watertight female head, 9 the second four-core watertight male head, 10 fixing ring, 11 poles, 12 reinforcement poles, 13 twisted pairs, 14 power cords, 15 packing layers, 16 sealing rings, 17 sets of poles, 18 annular inserts, 19 jacks, 20 annular slots, 21 gaskets, 22 inserts , 23 base plate, 24 spring, 25 contact piece, 26 flared end, 27 ring card plate.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the implementations. example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

The universal branch watertight cable for an underwater sensor according to an embodiment of the present invention may include an RS485 communication bus 1, one end of the RS485 communication bus 1 is connected with a cable connector 2, and the surface of the RS485 communication bus 1 is connected with an RS485 communication branch line 3. One end of the RS485 communication branch line 3 is connected with an RS232 to RS485 module 4 , and the RS232 to RS485 module 4 is externally connected with a branch cable 5 .

1-3 of the specification, the branch cable 5 of the universal branch watertight cable for underwater sensors in this embodiment includes a four-core watertight twisted pair cable 51, and the four-core watertight twisted pair cable 51 includes a first A cable and a second cable, the first cable is connected with the second cable, one end of the first cable is connected with the first four-core watertight female connector 52 and the other end is connected with the first four-core watertight male connector Head 53, the end of the second cable away from the first cable is connected with a second four-core watertight female connector 54, and the second four-core watertight female connector 54 is matched with the RS232 to RS485 module 4;

There are a plurality of the branch cables 5, and a connecting cable 7 is arranged between two adjacent branch cables 5. One end of the connecting cable 7 is connected with a third four-core watertight female head 8 and another. One end is connected with the second four-core watertight male head 9, between the first four-core watertight male head 53 and the third four-core watertight female head 8 and between the second four-core watertight male head 9 and the first four-core watertight female head 52 are matched.

The implementation scenario is as follows: in actual use, the operator can connect the cable connector 2 to the data collector for marine environment monitoring. When it is necessary to use different underwater sensors to observe multiple data of the marine environment at the same time, The first four-core watertight female connector 52 on the branch cable 5 can be connected with the RS232 to RS485 module 4, and the second four-core watertight male connector 9 on one end of the connection cable 7 can be connected with the other branch cable 5. The first four-core watertight female connector 52 is connected, and at the same time, the other end of the connecting cable 7 is connected to the third four-core watertight female connector 8 and the first four-core watertight male connector 53 on the initial branch cable 5, and then Connect the second four-core watertight female head 54 on each part of the branch cable 5 with different underwater sensors, so that the corresponding number of branch cables and the corresponding length of connection cables can be selected according to the number of sensors and the position of the sensors. It can meet the observation needs of various underwater sensors, and improve the scalability and versatility of the ocean observation system.

Referring to FIG. 4 of the description, the first cable, the second cable and the connecting cable 7 of the underwater sensor universal branch watertight cable of this embodiment are all provided with a fixing ring 10 at the center of the inner cavity, and the fixing ring has 10 circumferences. A support rod 11 is provided on the side outer wall, the two ends of the support rod 11 are respectively fixedly connected to the fixing ring 10 and the inner wall of the cable at the corresponding position, and the cable can withstand a low temperature of -40°C and a pressure of 500m underwater.

Further, the number of the struts 11 is set to four, and the four struts 11 are evenly distributed on the outer side wall of the fixing ring, and a reinforcing rod 12 is arranged between any two adjacent struts 11. Four threading areas are formed between the rod 12 and the four support rods 11, and a set of twisted pairs 13 and two power lines 14 are arranged inside the cable. A packing layer 15 is provided between the twisted pair 13 and the power line 14 and the reinforcing rod 12 and between the reinforcing rod 12 and the inner wall of the cable.

Further, the twisted pair 13 is used to transmit data, and the power line 14 is used to supply power to the RS232 to RS485 module 4 .

The implementation scenario is as follows: in actual use, the twisted pair 13 and the power line 14 inside the cable are firstly arranged in the threading area formed between the four reinforcing rods 12 and the four supporting rods 11 in order to utilize the dual Stranded wire 13 is used to transmit observation-related data, and power line 14 is used to supply power to RS232 to RS485 module 4, so as to ensure the stability of the marine observation system. The support rod 11, the fixing ring 10 and the reinforcing rod 12 are all made of Kevlar It is made of material, which greatly improves the load-bearing capacity of the cable, and the outer part of the cable is made of polyurethane material, which is conducive to the use of the cable in extreme environments, such as polar low temperature environments, and the twisted pair 13 and the power cable 14 are connected with the reinforcing rod. The filler layer 15 between the reinforcing rods 12 and the inner wall of the cable is filled with asbestos material, which is beneficial to improve the insulation performance of the cable.

5 , 6 , 8 and 9 of the description, the first four-core watertight male head 53 and the third four-core watertight female head 8 of the universal branch watertight cable for underwater sensors of this embodiment and the second A watertight mechanism is provided between the four-core watertight male head 9 and the first four-core watertight female head 52 , and the watertight mechanism includes an annular insert 18 and an annular slot 20 , and the annular insert 18 is fixedly arranged on the first One end of the four-core watertight female connector 52 and the third four-core watertight female connector 8, the annular slot 20 is disposed at the corresponding position of one end of the first four-core watertight male connector 53 and the second four-core watertight male connector 9, so A sealing ring 16 is provided on the end surface of the watertight female head corresponding to the outer side of the annular plug plate 18, and a sleeve rod 17 is embedded on the end surface of the corresponding watertight female head on the inner side. A plunger 22 is vertically disposed on the end surface of the watertight male head corresponding to the inner ring region of the annular slot 20 , and a sealing gasket 21 is covered inside the annular slot 20 .

Further, the top of the annular insert plate 18 is vertically provided with three concentrically arranged annular clamping plates 27, and the bottom end face of the inner cavity of the annular slot 20 is correspondingly provided with three concentrically arranged annular clamping slots 6. The card slot 6 is matched with the annular card plate 27 .

The implementation scenario is as follows: in actual use, insert the first four-core watertight female connector 52 and the annular plug 18 at one end of the third four-core watertight female connector 8 into the second four-core watertight male connector 9 and the first four-core watertight male connector 9 respectively. In the annular slot 20 at one end of the watertight male head 53, the first sealing is performed by the sealing ring 16 set on the end face of the watertight female head corresponding to the outer side of the annular insert plate 18, and then the sealing gasket 21 covered by the inner wall of the annular slot 20 is used for the first sealing. Carry out secondary sealing, and at the same time, three concentrically arranged annular clips 27 are vertically arranged on the top of the annular insert plate 18, and three concentrically arranged annular clips 6 are correspondingly arranged on the bottom end face of the inner cavity of the annular slot 20, Moreover, the gasket 21 in the annular groove 6 is in an interference fit with the annular clamping plate 27, which can further increase the watertight performance of the secondary seal, thereby greatly improving the watertightness of the branch watertight cable under water, thereby ensuring the safety of the marine observation system. Work stability.

Referring to Figures 6 and 7 of the description, a base plate 23 is fixed at the bottom of the sleeve rod 17 of the universal branch watertight cable for the underwater sensor of this embodiment, and a spring 24 is sleeved inside the corresponding jack 19 at the top of the base plate 23, so The top end of the spring 24 is fixedly connected with the contact piece 25, and the bottom end is fixedly connected with the base plate 23, and the spring 24 is made of copper material. The distance from the lowest point of the lower contact piece 25 to the top of the socket 19.

The specific implementation scenario is as follows: in actual use, the insertion rod 22 at the end of the watertight female head is inserted into the jack 19 at the end of the corresponding watertight male head, because the length of the insertion rod 22 is less than the depth of the jack 19 and greater than The distance from the contact piece 25 to the lowest point of the spring 24 to the top of the socket 19 in the natural state, so that when the insertion rod 22 is completely inserted into the socket 19, the contact piece 25 is in close contact with the end face of the insertion rod 22 under the action of the restoring force of the spring 24 In order to avoid poor contact during use, the spring 24 is made of copper material, which can greatly improve the stability of signal conduction.

Referring to Figures 7 and 9 of the specification, the bottom end of the annular insert plate 18 of the universal branch watertight cable for underwater sensors of this embodiment is provided with a flared end 26, and the top of the annular slot 20 is correspondingly provided with a flared slot, The flared end 26 mates with the flared slot.

The implementation scenario is as follows: in actual use, since the top of the annular slot 20 is provided with a flared slot, the accuracy of the insertion of the annular insert 18 can be greatly improved, the alignment time can be reduced, and the installation efficiency can be improved, while the bottom end of the annular insert 18 can be greatly improved. The flared end 26 can be perfectly matched with the flared groove, which can greatly reduce the accumulation of water in the flared groove, thereby improving the water tightness of the connection between the watertight male and watertight female connectors.

To sum up: the present invention connects the first four-core watertight female connector 52 on the branch cable 5 with the RS232 to RS485 module 4, and connects the second four-core watertight male connector 9 at one end of the connecting cable 7 with the RS232 to RS485 module 4. The first four-core watertight female connector 52 on the other branch cable 5 is connected, and at the same time, the other end of the connecting cable 7 is connected to the third four-core watertight female connector 8 and the first four-core on the original branch cable 5. The watertight male head 53 is connected, and then the second four-core watertight female head 54 on each part of the branch cable 5 is connected with different underwater sensors, so that the corresponding number of branch lines can be selected according to the number of sensors and the position of the sensors. The cable and the corresponding length of the connecting cable can meet the observation requirements of various underwater sensors, and improve the scalability and versatility of the marine observation system. 16 for the first sealing, and then use the sealing gasket 21 covered by the inner wall of the annular slot 20 to carry out the secondary sealing, and three concentrically arranged annular card plates 27 are vertically arranged on the top of the annular insert plate 18, and the annular insert The bottom end face of the inner cavity of the groove 20 is correspondingly provided with three concentric annular clamping grooves 6, and the sealing gasket 21 in the annular clamping groove 6 is in an interference fit with the annular clamping plate 27, which can further increase the watertight performance of the secondary seal. Thereby, the sealing performance of the branch watertight cable under water is greatly improved, thereby ensuring the working stability of the marine observation system.

The last points to be noted are: First of all, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, and may be mechanical connection. or electrical connection, or internal communication between two components, or direct connection, "up", "down", "left", "right", etc. are only used to indicate relative positional relationship, when the absolute position of the object being described changes, the relative positional relationship may change;

Secondly: in the drawings of the disclosed embodiments of the present invention, only the structures involved in the embodiments of the present invention are involved, and other structures may refer to the general design. In the case of no conflict, the same embodiment and different embodiments of the present invention can be mutually combination;

Finally: the above is only the preferred embodiment of the present utility model, and is not intended to limit the present utility model, all within the spirit and principle of the present utility model, any modification, equivalent replacement, improvement, etc. made, should include within the scope of protection of the present invention.

Claims (8)

1. A universal branch watertight cable for underwater sensors, comprising an RS485 communication bus (1), characterized in that: one end of the RS485 communication bus (1) is connected with a cable connector (2), and the RS485 communication bus ( 1) The surface is connected with an RS485 communication branch line (3), one end of the RS485 communication branch line (3) is connected with an RS232 to RS485 module (4), and the RS232 to RS485 module (4) is externally connected with a branch cable (5) ; The branch cable (5) includes a four-core watertight twisted pair cable (51), the four-core watertight twisted pair cable (51) includes a first cable and a second cable, and the first cable The cable is communicated with a second cable, one end of the first cable is connected with a first four-core watertight female connector (52) and the other end is connected with a first four-core watertight male connector (53). A second four-core watertight female connector (54) is connected to one end away from the first cable, and the second four-core watertight female connector (54) is matched with the RS232 to RS485 module (4); A plurality of the branch cables (5) are provided in number, a connecting cable (7) is arranged between two adjacent branch cables (5), and one end of the connecting cable (7) is connected with a third The four-core watertight female connector (8) and the other end are connected with a second four-core watertight male connector (9). The first four-core watertight male connector (53) and the third four-core watertight female connector (8) are The second four-core watertight male connector (9) is matched with the first four-core watertight female connector (52). 2. A universal branch watertight cable for underwater sensors according to claim 1, characterized in that: the first cable, the second cable and the central position of the inner cavity of the connecting cable (7) are all provided with fixed A ring (10), the outer wall of the peripheral side of the fixing ring (10) is provided with a support rod (11), and the two ends of the support rod (11) are respectively fixedly connected with the fixing ring (10) and the inner wall of the cable at the corresponding position . 3. The universal branch watertight cable for an underwater sensor according to claim 2, wherein the number of said struts (11) is provided with four, and the four struts (11) are evenly distributed on the fixing ring The outer side wall of the outer wall is provided with reinforcing rods (12) between any two adjacent support rods (11), and four threading areas are formed between the four said reinforcing rods (12) and the four support rods (11), And a set of twisted pair wires (13) and two power supply wires (14) are arranged inside the cable, the twisted pair wires (13) and the power supply wires (14) are sequentially arranged in the four threading areas, and the twisted pair wires (14) A packing layer (15) is provided between (13) and the power cord (14) and the reinforcing rod (12) and between the reinforcing rod (12) and the inner wall of the cable. 4. The universal branch watertight cable for underwater sensors according to claim 3, wherein the twisted pair (13) is used for data transmission, and the power line (14) is used for converting RS232 to RS485 Module (4) supplies power. 5. A universal branch watertight cable for underwater sensors according to claim 1, characterized in that: between the first four-core watertight male connector (53) and the third four-core watertight female connector (8) and A watertight mechanism is provided between the second four-core watertight male head (9) and the first four-core watertight female head (52), and the watertight mechanism includes an annular insert plate (18) and an annular slot (20). The annular insert plate (18) is fixedly arranged on one end of the first four-core watertight female connector (52) and the third four-core watertight female connector (8), and the annular slot (20) is arranged on the first four-core watertight male connector. At the position corresponding to one end of the head (53) and the second four-core watertight male head (9), a sealing ring (16) is provided on the end surface of the watertight female head corresponding to the outer side of the annular insert plate (18), and the inner side corresponding to the watertight A sleeve rod (17) is embedded on the end face of the female head, a socket (19) is vertically penetrated through the top of the sleeve rod (17), and the watertight male head end face corresponding to the inner ring area of the annular slot (20) A plunger (22) is vertically arranged on the top, and a sealing gasket (21) is covered inside the annular slot (20). 6 . The universal branch watertight cable for underwater sensors according to claim 5 , wherein the top of the annular insert plate ( 18 ) is vertically provided with three concentric annular clip plates ( 27 ). The bottom end face of the inner cavity of the annular slot (20) is correspondingly provided with three concentric annular clamping grooves (6), the annular clamping grooves (6) matching with the annular clamping plate (27). 7 . The universal branch watertight cable for underwater sensors according to claim 5 , wherein a base plate ( 23 ) is fixedly arranged at the bottom of the sleeve rod ( 17 ), and a corresponding plug on the top of the base plate ( 23 ) is provided. 8 . A spring (24) is sleeved inside the hole (19), the top end of the spring (24) is fixedly connected with a contact piece (25), and the bottom end is fixedly connected with the base plate (23), and the spring (24) is made of copper material , the length of the insertion rod (22) is less than the depth of the socket (19), and is greater than the distance from the contact piece (25) of the spring (24) to the lowest point to the top of the socket (19) in a natural state. 8. A universal branch watertight cable for underwater sensors according to claim 5, characterized in that: the bottom end of the annular insert plate (18) is provided with a flared end (26), and the annular slot ( 20) A flared groove is correspondingly provided at the top, and the flared end (26) is matched with the flared groove.

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