CN212626405U

CN212626405U - Instrument cable switching box and instrument cable switching system

Info

Publication number: CN212626405U
Application number: CN202021814756.7U
Authority: CN
Inventors: 张彦
Original assignee: Csd Water Service Co ltd
Current assignee: Csd Water Service Co ltd
Priority date: 2020-08-26
Filing date: 2020-08-26
Publication date: 2021-02-26
Anticipated expiration: 2030-08-26

Abstract

The application provides an instrument cable changes and connects case and instrument cable system of changing, relates to cable and changes and connects technical field. The instrument cable switching box is provided with a wire inlet and a wire outlet; the instrument cable switching box is internally provided with: a cable change-over device; a plurality of groups of wiring terminal rows are arranged in the cable switching device, and a cable of a type corresponding to the cable switching device on one instrument extends into the instrument cable switching box through the wire inlet and is connected with the wiring terminals on one group of wiring terminal rows; and the plurality of groups of wiring terminal rows are used for converging a plurality of cable inlet wires connected with the wiring terminals to form a large-logarithm cable, and the large-logarithm cable is connected to the corresponding type of terminal of the cable switching device on the control cabinet after extending out of the wire outlet. Through assembling many instrument cables and forming single large logarithm cable to lay to the terminal of the switch board corresponding type, under the prerequisite that realizes that transmission type and function are unchangeable, reduced the comprehensive cost of laying the route construction, so that the maintenance management, and improved the security.

Description

Instrument cable switching box and instrument cable switching system

Technical Field

The utility model relates to a cable transposition technical field particularly, relates to an instrument cable transposition case and instrument cable transposition system.

Background

Generally, in the design of water treatment engineering, a large number of detection and analysis instruments such as temperature, pressure, flow, material level and analysis and the like and actuators such as valves and the like need to be configured to complete the process monitoring and control functions so as to achieve the core goal of continuous standard discharge of water treatment. The field instrument transmitter is generally divided into two-wire system, three-wire system, four-wire system and other types, the field instrument is connected with a corresponding port of the control cabinet through an instrument cable to realize transmission, control and the like of instrument data, and the required instrument cables are large in quantity and multiple in types.

At present, the instrument cables are usually laid in a single body by using a cable bridge, and laid in a single body outside a general diagram arrangement by using a cable trench to a control cabinet room.

However, the prior art has the disadvantages of high cost, large occupied laying route space, inconvenience for maintenance and management and certain potential safety hazard.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an instrument cable trades and connects case and instrument cable system of trading not enough among the above-mentioned prior art to under the unchangeable prerequisite of realization transmission type and function, reduce the comprehensive cost of cable purchase and laying route construction, so that the maintenance management improves the security.

In order to achieve the above purpose, the technical solutions adopted in the embodiments of the present application are as follows:

in a first aspect, an embodiment of the present application provides an instrument cable switching box, where the instrument cable switching box is provided with a wire inlet and a wire outlet; the instrument cable switching box is internally provided with: a cable change-over device; the cable switching device is internally provided with: the cable corresponding to the type of the cable switching device on one instrument extends into the instrument cable switching box through the wire inlet and is connected with the wiring terminals on one wiring terminal row;

and the plurality of groups of wiring terminal rows are used for converging a plurality of cable inlet wires connected with the wiring terminals to form a large-logarithm cable, and the large-logarithm cable is connected to the corresponding type of terminal of the cable switching device on the control cabinet after extending out of the wire outlet.

Optionally, the cable changing device is a first type cable changing device;

the cable corresponding to the first cable switching device is an analog signal cable, and the wiring terminals on a plurality of wiring terminal rows in the first cable switching device are respectively connected with the analog signal cables of a plurality of instruments;

and a plurality of groups of wiring terminal rows in the first type of cable switching device are used for converging a plurality of analog signal cables connected with wiring terminals to form a large-logarithm analog signal cable, and the large-logarithm analog signal cable is connected to an analog signal end on the control cabinet after extending out of the wire outlet.

Optionally, if the analog signal cables of the multiple instruments are analog signal cables of instrument transmitters on the multiple instruments, the analog signal end is an analog input AI end on the control cabinet;

and if the analog signal cables of the instruments are the analog signal cables of the instrument regulators on the instruments, the analog signal end is an analog output AO end on the control cabinet.

Optionally, the terminal block further includes: a shield terminal;

the analog signal cable and the large-logarithm analog signal cable are shielded cables, the shielding layer of the analog signal cable is connected with the shielding terminal, and the shielding terminal is further connected with the shielding layer of the large-logarithm analog signal cable.

Optionally, the cable changing device is a second type of cable changing device;

the cable corresponding to the second type of cable switching device is a switching value signal cable, and the wiring terminals on a plurality of groups of wiring terminal rows in the second type of cable switching device are respectively connected with the switching value signal cables of a plurality of instruments;

and a plurality of groups of wiring terminal rows in the second type of cable conversion device are used for converging a plurality of switching value signal cables connected with wiring terminals to form a large-logarithm switching value signal cable, and the large-logarithm switching value cable is connected to a digital signal end on the control cabinet after extending out of the wire outlet.

Optionally, if the switching value signal cables of the multiple meters are digital signal cables of the switching value acquisition ends of the meters on the multiple meters, the digital signal end is a digital input DI end on the control cabinet;

or, if the switching value signal cables of the plurality of meters are digital signal cables of the switching value control ends of the meters on the plurality of meters, the digital signal end is a digital output DO end on the control cabinet.

Optionally, the terminal block further includes: a shield terminal;

the switching value signal cable and the large-logarithm switching value signal cable are shielding type cables, the shielding layer of the switching value signal cable is connected with the shielding terminal, and the shielding terminal is further connected with the shielding layer of the large-logarithm switching value signal cable.

Optionally, the cable changing device is a third type cable changing device;

the cable corresponding to the type of the third type of cable switching device is a power cable, and the wiring terminals on a plurality of wiring terminal rows in the third type of cable switching device are respectively connected with the power cables of a plurality of instruments;

and a plurality of groups of wiring terminal rows in the third type of cable switching device are used for converging a plurality of power cables connected with wiring terminals to form a large-logarithm power cable, and the large-logarithm power cable is connected to the power supply end on the control cabinet after extending out of the wire outlet.

Optionally, the wire inlet and the wire outlet are located below a shell of the instrument cable switching box, and the instrument cable switching box is made of stainless steel.

In a second aspect, an embodiment of the present application further provides an instrument cable switching system, including: the system comprises field instruments, at least one type of instrument cable switching box and a control cabinet; each type of instrument cable switching box is the instrument cable switching box provided by the embodiment of the first aspect;

the wiring terminals of the wiring terminal rows in each type of instrument cable switching box are connected, and a plurality of cables of corresponding types are arranged on each type of instrument cable switching box on the field instrument entering through the wire inlet;

the multi-group wiring terminal row is right after the incoming lines of the cables are gathered, a large-logarithm cable is formed, and the large-logarithm cable is connected to the corresponding type terminal of each type of instrument cable switching device on the control cabinet after extending out of the wire outlet of each type of instrument cable switching box.

The utility model has the advantages that:

the utility model provides an instrument cable switching box and an instrument cable switching system, wherein the instrument cable switching box is provided with a wire inlet and a wire outlet; this instrument cable is provided with in the change connection box: a cable change-over device; the cable switching device is internally provided with: the cable corresponding to the type of the cable switching device on one instrument extends into the instrument cable switching box through the wire inlet and is connected with the wiring terminals on one wiring terminal row; and the plurality of groups of wiring terminal rows are used for converging a plurality of cable inlet wires connected with the wiring terminals to form a large-logarithm cable, and the large-logarithm cable is connected to the corresponding type of terminal of the cable switching device on the control cabinet after extending out of the wire outlet. The utility model discloses an among the scheme, the back is assembled large in quantity, the many kind instrument cable to multiunit binding post row in the case through instrument cable switching to lay to the terminal that the switch board corresponds the type, under the unchangeable prerequisite of realization transmission type and function, reduce the comprehensive cost of cable purchase and laying route construction, so that maintain the management, and improved the security.

In addition, the cable switching device can be a first-class cable switching device, the type of cable corresponding to the first-class cable switching device is an analog signal cable, the analog signal cables of a plurality of instruments are respectively connected through wiring terminals on a plurality of wiring terminal rows in the first-class cable switching device, a large logarithm analog signal cable is formed after the plurality of analog signal cables are gathered, the large logarithm analog signal cable is extended out through a wire outlet and then is connected to an analog signal end on a control cabinet to complete process monitoring and control functions, so that the core target of continuous standard-reaching discharge of water treatment is realized, the comprehensive cost of cable purchase and routing construction is reduced on the premise of no change of transmission types and functions, maintenance and management are facilitated, and safety is improved.

Secondly, still have on the binding post row: the shielding terminal can be connected with the shielding layer of the analog signal cable and is also connected with the shielding layer of the large-logarithm analog signal cable, so that the continuity of signal shielding is ensured when the analog signal cable is replaced and connected into the large-logarithm analog signal cable through the first cable replacing and connecting device.

Finally, corresponding type instrument cable switching boxes are respectively configured according to the use types of the instrument cables, correspondingly, cable switching devices arranged in the instrument cable switching boxes of different types correspond to the cables of different types, namely the cable switching devices can also be a second type cable switching device and a third type cable switching device, and therefore mutual interference of different types of signals during bare wire switching in the cable switching devices can be prevented.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of an instrument cable transition box according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of an instrument cable transition box according to another embodiment of the present invention;

fig. 3 is a schematic structural diagram of an instrument cable transition box according to another embodiment of the present invention;

fig. 4 is a schematic structural diagram of an instrument cable transition box according to another embodiment of the present invention;

fig. 5 is a schematic structural diagram of an instrument cable transition box according to another embodiment of the present invention;

fig. 6 is a schematic structural diagram of an instrument cable transition box according to another embodiment of the present invention;

fig. 7 is a schematic structural diagram of an instrument cable switching system according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of an instrument cable switching system according to another embodiment of the present invention.

Icon: 100-instrument cable change-over box; 101-wire inlet; 102-outlet port; 103-cable switching device; 104-terminal block; 105-large pair cables; 106-a control cabinet; 107-field instruments; 201-first type cable switching device; 301-shield terminals; 401-cable changing device of the second type; 601-a third type cable switching device; 700-instrument cable change over system; 801-first type instrument cable switching box; 802-second class instrument cable change box; 803-third type instrument cable change-over box.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The instrument cable organizer provided herein will be described in detail below with reference to several specific embodiments.

Fig. 1 is a schematic structural diagram of an instrument cable transition box according to an embodiment of the present invention; as shown in fig. 1, the meter cable switching box 100 is provided with a wire inlet 101 and a wire outlet 102; optionally, the box protection level of the instrument cable changing box 100 is required to be more than IP55, so that the waterproof and dustproof effects can be achieved, and the use reliability of the instrument cable changing box 100 is improved.

Optionally, the external ground wire of the box body of the instrument cable switching box 100 is reliably grounded, so that the instrument cable switching box 100 can prevent interference and static electricity, avoid electric shock hazard, and further improve the safety of using the instrument cable switching box.

The instrument cable inlet wire can be connected into the instrument cable switching box 100 through the wire inlet 101 formed in the instrument cable switching box 100, and the instrument cable is led out to the corresponding module at the end of the control cabinet 106 through the wire outlet 102, so that good voltage or current access and reliable disconnection during maintenance in normal operation can be guaranteed.

This instrument cable trades and is provided with in the case 100: cable change over device 103, cable change over device 103 is fixed to be set up in instrument cable change over box 100 through the two-layer board to and be provided with in the cable change over device 103: and a plurality of groups of terminal blocks 104, wherein the number of the terminal blocks 104 is the number of instrument cables to be switched according to the cable switching device 103 and certain spare terminal blocks are reserved so as to improve the practicability of the instrument cable switching box 100.

Optionally, the cable switching devices 103 of different power sources or signal types are for tandem connection of different instrument cables, different terminal blocks 104 can be set according to different voltage/current requirements, and a latest crimping or splicing connection circuit connection technology is used to implement a safe, reliable and effective conductor connection path, so that a plurality of instrument cables can be led in and out to terminals of the control cabinet 106, which correspond to the type of the cable switching devices 103, to be conveniently connected and disconnected, thereby ensuring good voltage/current paths during normal operation and reliable disconnection during maintenance.

Optionally, the terminals on the terminal block 104 are provided with +1, -2, etc. identifiers, so as to reliably disconnect the accessed instrument cables during maintenance. In addition, the material of the connecting terminal on the connecting terminal row 104 is copper material and is suitable for connecting copper wires, the connecting terminal has a fastening piece such as a spring pressing piece and a fastening screw which is connected with an external wire, the fastening screw has a self-locking structure and a loss prevention function, and the contact pressure and the current passing capacity of the conductor at rated current and short-circuit current are met.

In some embodiments, for example, a cable of the type corresponding to the cable jumper 103 on one field instrument 107 extends into the instrument cable jumper box 100 through the inlet 101 and connects to a set of terminals on the terminal block 104; the multiple terminal block rows 104 are configured to converge a plurality of cables connected to the terminal block to form a large pair of cables 105, and extend the large pair of cables 105 through the outlet 102 to connect to a terminal of a type corresponding to the cable switching device 103 on the control cabinet 106, for example, the control cabinet 106 may be a PLC (Programmable Logic Controller) cabinet, and the large pair of cables 105 may be led out to the terminal of the type corresponding to the cable switching device 103 on the PLC cabinet through the outlet 102 to ensure that the transmission type and the detection control function are unchanged.

Optionally, the large-pair cable 105 is a single-pair shielding tape total shielding type large-pair cable, so that the anti-interference capability of the large-pair cable is improved, and the purpose of ensuring stable and reliable use of the instrument cable change-over box 100 is achieved.

To sum up, the embodiment of the present application provides an instrument cable switching box, which is provided with a wire inlet and a wire outlet; this instrument cable is provided with in the change connection box: a cable change-over device; the cable switching device is internally provided with: the cable corresponding to the type of the cable switching device on one instrument extends into the instrument cable switching box through the wire inlet and is connected with the wiring terminals on one wiring terminal row; and the plurality of groups of wiring terminal rows are used for converging a plurality of cable inlet wires connected with the wiring terminals to form a large-logarithm cable, and the large-logarithm cable is connected to the corresponding type of terminal of the cable switching device on the control cabinet after extending out of the wire outlet. The utility model discloses an among the scheme, the back is assembled large in quantity, the many kind instrument cable to multiunit binding post row in the case through instrument cable switching to lay to the terminal that the switch board corresponds the type, under the unchangeable prerequisite of realization transmission type and function, reduce the comprehensive cost of cable purchase and laying route construction, so that maintain the management, and improved the security.

Fig. 2 is a schematic structural diagram of an instrument cable transition box according to another embodiment of the present invention; alternatively, on the basis of the above-described embodiments, the cable switching device 103 may be the first type cable switching device 201.

Generally, the type of the meter cable may be classified according to its use, for example, the meter cable may be classified as: analog signal cable, switching signal volume cable, power cable etc. then can dispose corresponding type instrument cable switching box 100 respectively according to the use type of instrument cable, and correspondingly, the cable switching device 103 that sets up in the instrument cable switching box 100 of different grade type corresponds the cable of different grade type, can prevent like this that different kind signals from interfering each other when the bare connection is switched in cable switching device 103.

For example, the type of cable corresponding to the first cable adapter 201 is an analog signal cable, and the terminals on the plurality of terminal blocks 104 in the first cable adapter 201 are respectively connected to analog signal cables of a plurality of meters, for example, a meter transmitter or a regulator generally implements a detection control function in a 4-20ma analog signal mode through a corresponding module channel on the analog signal cable input or output control cabinet 106 of the meter.

It should be noted that, except for the power supply type instrument cable, the analog signal cable and the switch signal cable need to be shielded cables, and the cross section of the copper core of the conductor in each instrument cable can be determined according to different use functions of voltage and current, so as to improve the anti-interference performance of each instrument cable.

For example, the analog signal cable can adopt single shielding and total shielding to strengthen the anti-jamming capability of the analog signal cable, and the section of a copper core of a conductor in the analog signal cable can also be determined according to different use functions of voltage and current.

The multiple wiring terminal blocks 104 in the first cable switching device 201 are used for converging a plurality of analog signal cables connected with wiring terminals to form a large-logarithm analog signal cable, and the large-logarithm analog signal cable is extended out through the wire outlet 102 and then connected to an analog signal end on the control cabinet 106 to realize a detection control function.

Alternatively, the large pair analog signal cables may be a single pair of shielded strip total shield type.

Optionally, if the analog signal cables of the multiple meters are analog signal cables of the multiple meter transmitters on the meters, the analog signal end is an analog input AI end on the control cabinet 106, so that the control cabinet 106 can receive detection signals of field temperature, pressure, flow, level, analysis, and the like transmitted by the multiple meter transmitters on the meters through the AI end.

If the analog signal cables of the instruments are the analog signal cables of the instrument regulators on the instruments, the analog signal end is an analog output AO end on the control cabinet, so that the control cabinet 106 can send control execution commands to the instrument regulators on the instruments through the AO end to complete process monitoring and control functions, and the core target of continuous standard-reaching discharge of water treatment is realized.

Fig. 3 is a schematic structural diagram of an instrument cable transition box according to another embodiment of the present invention; optionally, as shown in fig. 3, on the basis of the above embodiment, the terminal block 104 further includes: the shield terminal 301.

For example, the analog signal cable may be of a type DJPVR-1 × 2 × 1.5, where "P" in the DJPVR "represents a shielding layer in the analog signal cable, and the log analog signal cable may be of a type DJPVRP-24 × 2 × 0.75, where" two "P" in the DJPVRP "both represent shielding layers of the log analog signal cable, and the shielding layers are of a single-pair shielding tape total shielding type, so that the shielding layers of the analog signal cable may be connected to the shielding terminal 301, and the shielding terminal 301 is also connected to the shielding layers of the log analog signal cable, thereby ensuring continuity of signal shielding when the analog signal cable is switched to the log analog signal cable through the first cable switching device 201.

Fig. 4 is a schematic structural diagram of an instrument cable transition box according to another embodiment of the present invention; optionally, as shown in fig. 4, the cable switching device 103 may further include a second type cable switching device 401, where the type of cable corresponding to the second type cable switching device 401 is a switching value signal cable, and the switching value signal cables of the multiple meters may be connected through the connection terminals on the multiple sets of connection terminal rows 104 in the second type cable switching device 401 respectively.

Specifically, the multiple groups of terminal blocks 104 in the second cable switching device 401 are used for converging multiple switching value signal cables connected to the terminal blocks to form a large-logarithm switching value signal cable, and the large-logarithm switching value signal cable is extended out through the outlet 102 and then connected to the digital signal terminal of the control cabinet 106, so as to realize the interlocking control function.

Optionally, if the switching value signal cables of the multiple meters are digital signal cables of the switching value acquisition ends of the multiple meters, the digital signal end is a digital input DI end on the control cabinet 106, so that the control cabinet 106 can receive the switching state information of the field valve transmitted by the digital signal cables of the switching value acquisition ends of the multiple meters through the DI end.

Or, if the switching value signal cables of the plurality of meters are digital signal cables of the switching value control ends of the meters on the plurality of meters, the digital signal ends are digital output DO ends on the control cabinet, so that the control cabinet 106 can send execution commands of opening or closing and the like to the switching value control ends of the plurality of meters through the DO ends to complete process monitoring and control functions, and a core target of continuous standard-reaching discharge of water treatment is realized.

Fig. 5 is a schematic structural diagram of an instrument cable transition box according to another embodiment of the present invention; alternatively, as shown in fig. 5, on the basis of the above-mentioned embodiments, the terminal block 104 in the second type cable switching device 401 also has: the shield terminal 301.

For example, the switching value signal cable can be of a type DJPVR-1 × 2 × 1.5, and the log switching signal cable can be of a type DJPVR-24 × 2 × 0.75, so that the shielding layer of the switching value signal cable can be connected with the shielding terminal 301, and the shielding terminal 301 is also connected with the shielding layer of the log switching value signal cable, thereby ensuring the continuity of signal shielding when the switching value signal cable is switched into the log switching value signal cable through the second type of cable switching device 401.

Fig. 6 is a schematic structural diagram of an instrument cable transition box according to another embodiment of the present invention; optionally, as shown in fig. 6, the cable transition device 103 may further comprise a third type of cable transition device 601.

The type of cable corresponding to the third type of cable switching device 601 is a power cable, and the connection terminals of the multiple groups of connection terminal rows 104 in the third type of cable switching device 601 are respectively connected to the power cables of the multiple meters, for example, the power cable may be of a type of KYJV-3 × 1.5, which is not limited herein.

Specifically, the multiple terminal rows 104 in the third type of cable switching device 601 are used for converging a plurality of power cables connected to the terminal to form a large-pair power cable, for example, a model of DJYPVR-12 × 3 × 1.5 may be used as the large-pair power cable.

After a plurality of Power cables are converged to form a large pair of Power cables, and the large pair of Power cables extend out through the outlet 102, and then are connected to a Power Supply end on the control cabinet 106, for example, the large pair of Power cables can be connected to a PLC ac/dc Power distribution system, so that uninterrupted Power Supply can be provided for a plurality of instruments through a Power Supply device of a UPS (Uninterruptible Power Supply) in the PLC ac/dc Power distribution system, thereby ensuring the continuity of the work of the instruments, and improving the work efficiency of completing the process monitoring and control functions.

Alternatively, the inlet 101 and the outlet 102 are located below the housing of the instrument cable changing box 100, and a cable waterproof and dustproof sealing locking device (glan) is provided at the inlet 101 and the outlet 102, so that the waterproof performance of the instrument cable changing box 100 can be improved.

Moreover, the instrument cable changing box 100 is made of stainless steel, for example, the instrument cable changing box 100 may be made of various materials such as stainless steel, carbon steel plastic spraying, explosion-proof safety and the like according to the use environment, so that when the exposed instrument cable in the instrument cable changing box 100 is changed, the continuity of signal transmission and the shielding anti-interference performance are improved.

Fig. 7 is a schematic structural diagram of an instrument cable switching system according to an embodiment of the present invention; as shown in fig. 7, the instrument cable jumper system 700 may include: a field instrument 107, at least one type of instrument cable tie-down box 100, and a control cabinet 106.

Each type of instrument cable changing box is the instrument cable changing box 100 in the above embodiment.

Specifically, for example, as shown in fig. 1 and 7, the terminals of the plurality of terminal rows 104 in each type of instrument cable changing box are connected to and enter through the wire inlet 101, and a plurality of cables of corresponding types are arranged on each type of instrument cable changing box on the field instrument 107.

After the multiple groups of wiring terminal rows 104 converge the incoming wires of the multiple cables, a large-logarithm cable is formed, the large-logarithm cable extends out of the wire outlet 102 of each type of instrument cable switching box and is connected to the corresponding type terminal of each type of instrument cable switching device on the control cabinet 106, therefore, the multiple cables can be replaced and connected into a single large-logarithm cable through the corresponding cable switching device in each type of instrument cable switching box, the single large-logarithm cable is connected to the corresponding type terminal on the control cabinet, and the technical idea of reducing the construction cost and facilitating maintenance and management is achieved.

Fig. 8 is a schematic structural diagram of an instrument cable switching system according to another embodiment of the present invention; as shown in fig. 8, the field instrument 107 may be a plurality of on-meter instrument transmitters or a plurality of on-meter instrument regulators, or may include both: a plurality of on-meter instrument transmitters and a plurality of on-meter instrument regulators, by way of example only.

For example, in some embodiments, the instrument cable jumper system 700 may include three types of instrument cable jumper boxes, where the cable jumper 103 provided in each type of instrument cable jumper box corresponds to a different type of cable, i.e., the cable jumper 103 may include: the cable switching device comprises a first type cable switching device 201, a second type cable switching device 401 and a third type cable switching device 601.

For example, the three types of instrument cable switching boxes are respectively the first type of instrument cable switching box 801, and correspondingly, the first type of cable switching device 201 is arranged in the first type of instrument cable switching box 801, so that a plurality of analog signal cables of instrument transmitters on a plurality of instruments can be switched into a single large-logarithm analog signal cable through the first type of cable switching device 201. For another example, the second-type cable switching device 401 disposed in the second-type instrument cable switching box 802 may switch a plurality of switching value signal cables of the instrument regulators on a plurality of instruments into a single large-logarithm switching value signal cable; can also change many cable power cables into single large logarithm power cable through third type cable switching device 601 that sets up in third type instrument cable switching case 803, can change the cable switching device in many cables through every type of instrument cable switching case that corresponds like this and change and connect into single large logarithm cable, and with the terminal of this single large logarithm cable connection to corresponding type on the switch board, can prevent like this that different kind signals from mutual interference when the bare connection is switched in the cable switching device, realized the construction cost and reduced and be convenient for the technical theory of maintenance and management.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The instrument cable switching box is characterized in that a wire inlet and a wire outlet are formed in the instrument cable switching box; the instrument cable switching box is internally provided with: a cable change-over device; the cable switching device is internally provided with: the cable corresponding to the type of the cable switching device on one instrument extends into the instrument cable switching box through the wire inlet and is connected with the wiring terminals on one wiring terminal row;

2. The instrument cable tie-down box of claim 1, wherein the cable tie-down device is a first type of cable tie-down device;

3. The instrument cable transition box of claim 2, wherein if the analog signal cables of the plurality of instruments are analog signal cables of instrument transmitters on the plurality of instruments, the analog signal terminal is an analog input AI terminal on the control cabinet;

4. The instrument cable tie-down box of claim 2, further comprising: a shield terminal;

5. The instrument cable tie-down box of claim 1, wherein the cable tie-down device is a second type of cable tie-down device;

and a plurality of groups of wiring terminal rows in the second type of cable conversion device are used for converging a plurality of switching value signal cables connected with wiring terminals to form a large-logarithm switching value signal cable, and the large-logarithm switching value signal cable is connected to a digital signal end on the control cabinet after extending out of the wire outlet.

6. The instrument cable change-over box of claim 5, wherein if the switching value signal cables of the plurality of instruments are digital signal cables of the instrument switching value acquisition ends of the plurality of instruments, the digital signal end is a digital input DI end on the control cabinet;

or,

and if the switching value signal cables of the instruments are digital signal cables of the switching value control ends of the instruments on the instruments, the digital signal ends are digital output DO ends on the control cabinet.

7. The instrument cable tie-down box of claim 5, further comprising: a shield terminal;

8. The instrument cable tie-down box of claim 1, wherein said cable tie-down device is a third type cable tie-down device;

9. The instrument cable transition box according to any one of claims 1 to 8, wherein the inlet and outlet are located below a housing of the instrument cable transition box, and the instrument cable transition box is made of stainless steel.

10. A meter cable transition system, comprising: the system comprises field instruments, at least one type of instrument cable switching box and a control cabinet; wherein each type of instrument cable changing box is the instrument cable changing box in any one of the claims 1-9;

the wiring terminals of the multiple wiring terminal rows in each type of instrument cable switching box are connected and enter the field instrument through the wire inlet, and the multiple cables of corresponding types are arranged on each type of instrument cable switching box.