CN201312109Y - Nitrogen filled junction box - Google Patents

Abstract

The utility model relates to an underwater robot operation device, specifically a nitrogen-filled junction box that transfers high and low voltage electrical signals and optical fiber signals at the cable end to the slip ring tail line end to realize electrical signal transfer, comprising a box body, a high voltage terminal, a low voltage terminal, an optical fiber conversion joint and a cover plate, the cover plate is sealed on the box body, one end of the box body is equipped with a cable connector for the cable to pass through, and the other end is provided with a flange joint for the slip ring tail line to pass through; an inflation joint, a pressure limiting valve and an exhaust port plug are respectively provided on one side of the box body; the high and low voltage terminals are respectively insulated and installed in the box body, and the optical fiber conversion joint is installed in the box body; the corresponding signals on the cable passing through the inside of the junction box are transferred to the slip ring tail line through the high and low voltage terminals and the optical fiber conversion joint. The utility model has the advantages of good oxidation resistance and corrosion performance, reliable cable fixing, good sealing effect, good sealing performance of the junction box, and high insulation performance.

Description

Nitrogen filled junction box

technical field

The utility model relates to an underwater robot operating device, in particular to a nitrogen-filled junction box that transfers high and low voltage electrical signals and optical fiber signals at the cable end to the tail end of a slip ring to realize the electrical signal transfer.

Background technique

An underwater robot is a robot that works in an underwater environment. When an underwater robot performs underwater operations, it must have a power signal and a control signal, so that the robot carrier can complete relevant movements and actions underwater according to instructions. Among them, the transmission and conversion of electrical signals are through high-voltage control cabinets, low-voltage control cabinets, junction boxes, etc., and the power signals and control signals are transmitted to the underwater robot carrier through armored cables, so that the underwater robot carrier can complete the underwater operation. homework tasks.

At present, for the conversion of the power signal and the control signal of the underwater robot, it is generally realized by connecting the cable and the slip ring through a cable joint or through a junction box. For the method of transferring between the cable and the slip ring through the cable joint, the cable joint has a low service life, is prone to failure, has poor reliability, and cannot transmit optical fiber signals, and the transmission length is limited. It is only suitable for small and medium-sized underwater robots. Operation; for the way of switching through the junction box, the sealing performance of the existing junction box is poor, especially for the equipment used on board for a long time, the outside humid air is easy to enter the interior of the junction box, resulting in a decrease in the insulation inside the junction box , the system is unstable, and the terminals and joints are prone to oxidation and corrosion, which reduces the service life of the terminals and joints, and is prone to electrical failures, reducing the reliability of the system.

Utility model content

The purpose of the utility model is to provide a nitrogen-filled junction box, which is suitable for the transfer of power signals and control signals, and then realizes the driving and control of the underwater robot carrier through cables.

The purpose of this utility model is achieved through the following technical solutions:

The utility model includes a box body, a high-voltage terminal, a low-voltage terminal, an optical fiber conversion joint and a cover plate. Flange joints for the tail wires to penetrate into; one side of the box body is equipped with an inflatable joint, a pressure limiting valve and an exhaust port plug; the high and low voltage terminals are respectively insulated and installed in the box body, and the optical fiber conversion connector is installed in the box body; The corresponding signals on the cables penetrating into the junction box are transferred to the slip ring tail wires through high and low voltage terminals and optical fiber conversion joints.

Wherein: the cable connector includes a lock nut, a connecting body and a compression plug, one end of the connecting body is located inside the box, and the other end is located outside the box, and the locking nut and the compression plug are respectively connected to the two ends of the connecting body. Threaded connection; inside the connecting body, a sealing ring and a compression pad are coaxially arranged in sequence along the axial direction, and the compression plug is in contact with the compression pad; the bottom plate of the box body is provided with a connecting strip, on which , The upper and lower sides are fixed with insulating plates with guide rails, and the high and low voltage terminals are respectively installed on the two guide rails; there are three connection seats on one side of the box, and the inflatable joint, pressure limiting valve and exhaust port plug are respectively connected to the connection On the seat; there is an internal thread on the connecting seat, and the inflatable joint, the pressure limiting valve and the exhaust port plug are threadedly connected with the connecting seat; the inflatable joint, the pressure limiting valve and the exhaust port sealing are respectively located The outer surface; the side arm in the box is provided with a connecting block, and the optical fiber conversion connector is installed on the connecting block through the optical fiber bracket; the two ends of the bottom plate of the box are respectively provided with ear seats; rubber is clamped between the box and the cover Pad; between the cable connector and the box body, between the inflatable joint and the connecting seat, between the pressure limiting valve and the connecting seat, and between the exhaust port plug and the connecting seat are respectively provided with O-rings.

Advantage and positive effect of the present utility model are:

1. Good anti-oxidation and corrosion performance. The interior of the junction box is filled with nitrogen, which isolates the interior of the junction box from the outside air, and the internal humidity is low, preventing oxidation and corrosion of the wiring terminals and joints, and improving reliability.

2. The cable is fixed reliably and the sealing effect is good. The cable is fixed on the junction box through the cable connector, and the sealing and axial fixing are realized through the contact between the inner sealing ring of the cable connector and the outer surface of the cable.

3. The junction box has good sealing performance. There is a rubber gasket between the box cover and the box to ensure reliable sealing.

4. High insulation performance. There is an insulating plate between the terminal and the bottom plate of the box to ensure the insulation performance.

5. The internal space of the junction box is large, which is easy for internal wiring operation.

6. The pressure limiting valve on the junction box can limit the maximum pressure value inside the junction box to ensure the structural safety of the junction box.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the left view of Fig. 1;

Fig. 3 is a schematic structural diagram of the cable connector in Fig. 1;

Among them: 1 is the box body, 2 is the cable connector, 3 is the ear seat, 4 is the connecting strip, 5 is the high voltage terminal, 6 is the insulating plate, 7 is the guide rail, 8 is the connection seat, 9 is the inflatable joint, 10 is the limit Pressure valve, 11 is the exhaust port plugging, 12 is the low-pressure terminal, 13 is the flange, 14 is the flange joint, 15 is the connection block, 16 is the optical fiber bracket, 17 is the optical fiber conversion joint, 18 is the rubber pad, 19 is Cover plate, 20 is a locking nut, 21 is a connecting body, 22 is a sealing ring, 23 is a compression pad, and 24 is a compression screw plug.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described in further detail.

As shown in Figures 1-2, the utility model includes a box body 1, a high-voltage terminal 5, a low-voltage terminal 12, an optical fiber conversion joint 17 and a cover plate 19. The box body 1 is an internal hollow structure, and a round hole is opened on the upper plane. The cover plate 19 is installed on the upper plane of the box body 1 through the round hole, and a rubber pad 18 is provided between the box body 1 and the cover plate 19 to ensure the sealing of the junction box; one end of the box body 1 has a hole, The cable connector 2 passes through the hole and is installed on the box body 1. A flange 13 is provided on the outside of the other end of the box body 1. A flange joint 14 is fixedly connected to the flange 13, and an O-shaped seal is arranged between the two. Ring, on the box body 1 around the flange 13, there is a process hole concentric with the flange 13; on the outside of one side of the box body 1, three connecting seats 8 are provided, and the box body 1 around each connecting seat 8 is opened. There is a process hole concentric with the connecting seat 8, and the connecting end of each connecting seat 8 is provided with an internal thread; the inflatable joint 9, the pressure limiting valve 10 and the exhaust port plugging 11 are respectively threaded with the connecting seat 8, and the inflatable joint 9, The spigots of the connection ends of the pressure limiting valve 10 and the exhaust port plugging 11 are respectively located on the outer surface of the connecting seat 8, and the inflatable joint 9, the pressure limiting valve 10, the exhaust port blocking 11 and the connecting seat 8 are respectively provided with O-shaped Sealing ring; the connecting strip 4 is fixedly connected to the inner bottom plate of the box body 1, and the connecting strip 4 is provided with threaded holes, and the two insulating plates 6 are respectively installed up and down on the upper plane of the connecting strip 4, and the insulating plates 6 are provided with threaded holes , the two guide rails 7 are respectively installed on the surface of the two insulating plates 6 through threaded holes; the high-voltage terminal 5 is affixed to the guide rail 7 near the end of the cable connector 2, and the low-voltage terminal 12 is affixed to the guide rail 7 near the end of the flange 13 The connection block 15 is fixedly connected to the inner side plate of the box body 1, the connection block 15 is provided with threaded holes, the fiber support 16 is installed on the outer surface of the connection block 15, and the fiber support 16 has a round hole for installing the fiber conversion joint 17 , the optical fiber conversion joint 17 is installed on the optical fiber holder 16 through the round hole.

As shown in Figure 3, the cable connector 2 includes a lock nut 20, a connecting body 21 and a compression plug 24. One end of the connecting body 21 is located inside the box body 1, the other end is located outside the box body 1, and the connecting body 21 is located in the box body. One end inside the body 1 is threadedly connected with the lock nut 20, and is installed on the box body 1 through the lock nut 20; the sealing ring 22 is coaxially sleeved inside the connecting body 21 and abuts against the end surface inside the connecting body 21, The compression pad 23 is coaxially sleeved inside the connecting body 21 and abuts against the outer end surface of the sealing ring 22, and the compression screw plug 24 is coaxially screwed and installed on the end of the connecting body 21 outside the box body 1 and abuts against the outer end surface of the sealing ring 22. On the outer plane of the pressing pad 23; between the connecting body 21 and the box body 1, an O-ring is arranged.

One end of the cable penetrates into the interior of the junction box through the cable connector 2, and the axial direction of the cable can be positioned by screwing and tightening the screw plug 24; the slip ring tail wire penetrates into the interior of the junction box through the flange joint 14, and passes through The internal high-voltage terminal 5, low-voltage terminal 12, and optical fiber conversion joint 17 transfer the corresponding signal on the cable to the slip ring tail.

An ear seat 3 is provided on the bottom surface of the box body 1, and a process hole is opened on the ear seat 3, which is convenient for the overall installation of the junction box.

The utility model concrete assembly is as follows:

The connecting body 21 and the box body 1 are assembled together through the lock nut 20 by using the round hole at one end of the box body 1 and the spigot positioning at one end of the connecting body 21; The shaft sleeve is arranged inside the connecting body 21, and the sealing ring 22 and the pressing pad 23 are fixed by screwing the compression plug 24 on the other end of the connecting body 21; the flange joint 14 is positioned by the flange 13 upper lip function and is fixed on the end face of flange 13 with screws, and an O-shaped sealing ring is also provided between flange 13 and flange joint 14; The spigot end is located on the outer surface of the connecting seat 8, and an O-ring is provided between the inflatable joint 9 and the connecting seat 8; the pressure limiting valve 10 is fixed on the connecting seat 8 in the middle through a threaded connection, and the pressure limiting valve 10 The spigot end of the valve is located on the outer surface of the connecting seat 8, and an O-ring is provided between the pressure limiting valve 10 and the connecting seat 8; the exhaust port plug 11 is fixed on the upper connecting seat 8 through threaded connection, and the discharge The spigot end of the gas port plug 11 is located on the outer surface of the connection seat 8, and an O-ring is provided between the exhaust port plug 11 and the connection seat 8; two insulating plates 6 are respectively inserted into the threaded holes for installation by screws. On the upper plane of the connecting bar 4, two guide rails 7 are respectively fixed on the outer surfaces of the two insulating plates 6 through screw insertion threaded holes; the high-voltage terminal 5 is connected to the guide rail 7 close to the end of the cable connector 2 through the card slot on it Together, the low-voltage terminal 12 is connected with the guide rail 7 close to the end of the flange 13 through the card slot on it; the fiber support 16 and the connection block 15 are connected together by using the threaded holes on the connection block 15 and inserting screws into the threaded holes; Use the round hole on the fiber optic bracket 16 to coaxially install the fiber conversion connector 17 on the fiber optic bracket 16; one end of the cable passes through the cable connector 2 into the interior of the junction box, and the sealing ring 22 is elastically deformed by screwing the compression screw plug 24 , so that the sealing ring 22 is tightly connected to the outer surface of the cable, which can not only ensure the sealing between the cable connector 2 and the cable, but also enable the axial direction of the cable to be positioned; the slip ring tail wire passes through the flange joint 14 Penetrate into the interior of the junction box, and transfer the corresponding high-voltage signal, low-voltage signal and optical fiber signal on the cable to the end of the slip ring through the high-voltage terminal, low-voltage terminal, and optical fiber conversion connector inside the junction box; The round hole of the rubber pad 18 and the cover plate 19 are connected with the box body 1 by screws.

The working principle of the utility model is:

The cable is introduced into the junction box through the cable connector 2, and the sealing ring 22 is subjected to axial force by screwing and compressing the screw plug 24, so that the sealing ring 22 produces elastic deformation, so that the sealing ring 22 is tightly connected to the outer surface of the cable. Connected together, the elastic deformation of the sealing ring 22 can be controlled by adjusting the screwing length of the compression screw plug 24 and the connecting body 21, so that the friction between the sealing ring 22 and the outer surface of the cable can be controlled, so that the cable can be guaranteed The tightness between the connector 2 and the cable also enables the axial direction of the cable to be positioned; the high-voltage electrical signal, low-voltage electrical signal, and optical fiber signal corresponding to the cable introduced into the junction box pass through the high-voltage terminal 5, The low-voltage terminal 12 and the optical fiber conversion joint 17 are transferred to the tail end of the slip ring, and the power signal and control signal are transmitted to the underwater robot carrier through the armored cable, so that the underwater robot carrier can complete the underwater operation task. Use the nitrogen filling device to fill the junction box with nitrogen gas through the charging joint 9 on the junction box, replace the air inside the junction box through the exhaust port on the junction box, and then seal the exhaust port with the exhaust port plug 11 Sealing, through the pressure value set by the pressure limiting valve 10, a certain internal pressure is formed inside the junction box, so that the outside air cannot enter the interior of the junction box, so as to ensure that the interior of the junction box always maintains a certain pressure nitrogen environment, and ensure the wiring inside the junction box The terminals and joints are not oxidized and corroded by the air, which improves the reliability of the electrical signal transmission and conversion system, thereby ensuring the reliability of the underwater robot system.

The high and low voltage terminals of the present utility model are commercially available products, and the high voltage terminal is purchased from WAGO (Wanke) Company in Germany, and the model is 283-601; the low voltage terminal is purchased from WAGO Company in Germany, and the model is 280-901; The optical fiber conversion connector is a commercially available product, purchased from TYCO (Tyco) Company in the United States, and the model is RS 252-8617.

Claims (9)

1. one kind is filled the nitrogen terminal box, it is characterized in that: comprise casing (1), HV Terminal (5), low-voltage terminal (12), optical fiber crossover sub (17) and cover plate (19), cover plate (19) is sealed on the casing (1), one end of casing (1) is equipped with the cable connector (2) that current supply cable penetrates, and the other end is provided with the bump joint (14) that penetrates for the slip ring buttock line; Side at casing (1) is respectively equipped with gas-charging connection (9), pressure limiting valve (10) and exhaust outlet shutoff (11); Insulating mounting is in casing (1) respectively for high and low pressure terminal (5,12), and optical fiber crossover sub (17) is installed in the casing (1); The respective signal that penetrates on the cable of terminal box inside is forwarded to the slip ring buttock line by high and low pressure terminal (5,12) and optical fiber crossover sub (17).

2. by the described nitrogen terminal box of filling of claim 1, it is characterized in that: described cable connector (2) comprises locking nut (20), connector (21) and compresses plug screw (24), one end of connector (21) is positioned at casing (1), the other end is positioned at outside the casing (1), locking nut (20) and compress plug screw (24) and be threaded with the two ends of connector (21) respectively; Coaxial successively vertically sealing ring (22), the clamping pad (23) of being provided with compresses plug screw (24) and is connected to clamping pad (23) in the inside of connector (21).

3. by the described nitrogen terminal box of filling of claim 1, it is characterized in that: the base plate of described casing (1) is provided with intercell connector (4), go up, respectively be connected with up and down the insulation board (6) of band guide rail (7) at intercell connector (4), high and low pressure terminal (5,12) is installed in respectively on two guide rails (7).

4. by the described nitrogen terminal box of filling of claim 1, it is characterized in that: described casing (1) one side is provided with three Connection Blocks (8), and gas-charging connection (9), pressure limiting valve (10) and exhaust outlet shutoff (11) are connected on the Connection Block (8).

5. by the described nitrogen terminal box of filling of claim 4, it is characterized in that: described Connection Block (8) is provided with internal thread, and gas-charging connection (9), pressure limiting valve (10) and exhaust outlet shutoff (11) are threaded with Connection Block (8) respectively; The seam of gas-charging connection (9), pressure limiting valve (10) and exhaust outlet shutoff (11) lays respectively at the outer surface of Connection Block (8).

6. by the described nitrogen terminal box of filling of claim 1, it is characterized in that: the side arm in the described casing (1) is provided with contiguous block (15), and optical fiber crossover sub (17) is installed on the contiguous block (15) by structure of fiber_optic (16).

7. by the described nitrogen terminal box of filling of claim 1, it is characterized in that: the two ends at casing (1) base plate are respectively equipped with ear seat (3).

8. by the described nitrogen terminal box of filling of claim 1, it is characterized in that: clamping has rubber blanket (18) between described casing (1) and the cover plate (19).

9. by claim 1 or the 4 described nitrogen terminal boxes of filling, it is characterized in that: between cable connector (2) and the casing (1), between gas-charging connection (9) and the Connection Block (8), between pressure limiting valve (10) and the Connection Block (8) and be respectively equipped with the O RunddichtringO between exhaust outlet shutoff (11) and the Connection Block (8).

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