CN217484295U - Special junction box for multi-channel branching system combustible toxic gas detector - Google Patents
Special junction box for multi-channel branching system combustible toxic gas detector Download PDFInfo
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- CN217484295U CN217484295U CN202221294804.3U CN202221294804U CN217484295U CN 217484295 U CN217484295 U CN 217484295U CN 202221294804 U CN202221294804 U CN 202221294804U CN 217484295 U CN217484295 U CN 217484295U
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Abstract
The utility model relates to the technical field of petrochemical industry, in particular to a special junction box for a multi-channel branching combustible toxic gas detector, which comprises a box body, wherein a plurality of cable gland heads are arranged on the box body; the inside of the box body is provided with: the direct current switch power supply is provided with an alternating current voltage input end which is connected with an external alternating current power supply through a power supply breaker; the protection circuit comprises a plurality of fuse terminals, a plurality of common terminals, a plurality of analog signal positive terminals and a surge protector, wherein the surge protector is connected with an alternating voltage input end through a protection circuit breaker; the utility model discloses a system signal transmission mode of dividing the wiring separately independently outputs analog signal to combustible gas and toxic gas detection alarm system, and one of them or a plurality of detector trouble or circuit trouble can not influence the operation of system yet, avoid causing great hidden danger and cause great incident even.
Description
Technical Field
The utility model relates to a petrochemical technical field, concretely relates to special junction box equipment of combustible toxic gas detector.
Background
The combustible toxic gas detector can be divided into a combustible gas detector and a toxic gas detector, can be divided into a bus system detector and a branching system detector according to the output signal mode of the combustible toxic gas detector, and is widely applied to the fields of chemical industry, petroleum, medicine and the like.
The total system detector meets signal line open circuit among the conventional art, and during short-circuit fault, a detector or a plurality of detector trouble will cause combustible toxic detector system trouble, can not continue work, lead to combustible toxic gas detector system off-line to be stopped, cause great hidden danger, and chemical material has characteristics such as inflammable, explosive, poisonous, in case reveal will greatly influence safety in production.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a special junction box for a multi-channel branching flammable and toxic gas detector, which solves the technical problems;
a multi-channel junction box special for a combustible toxic gas detector comprises a box body, wherein a plurality of cable gland heads are arranged on the box body;
the box is internally provided with:
the direct current switch power supply is provided with an alternating current voltage input end, and the alternating current voltage input end is connected with an external alternating current power supply through a power supply breaker;
the fuse terminals are connected with the positive electrode of the direct-current voltage output end of the direct-current switching power supply;
and the common terminals are connected with the negative electrode of the direct-current voltage output end of the direct-current switching power supply.
The analog signal positive terminals are connected with an external gas detection alarm system cable and an external detector cable;
and the surge protector is connected with the alternating voltage input end through a protection breaker.
Preferably, the box body is a combined box body, which comprises,
the explosion-proof cavity is positioned at the upper part of the box body, and the direct-current switching power supply is arranged in the explosion-proof cavity;
and the safety increasing cavity is positioned at the lower part of the box body, and the fuse terminal, the public terminal and the analog signal positive terminal are arranged in the safety increasing cavity.
Preferably, a plurality of the cable gland heads include:
an AC power inlet connected with an external AC power cable;
the external gas detection alarm system cable is connected with the analog signal positive terminal and the common terminal through the meter multi-core cable inlet;
a plurality of instrument signal cable inlets through which the external probe cable is connected the analog signal positive terminal, the common terminal, and the fuse terminal.
Preferably, the common terminals are arranged in a row on the first terminal connecting piece, and each adjacent common terminal is connected sequentially by a jumper.
Preferably, the analog signal positive terminals are arranged on the second terminal connecting piece in a row, every N adjacent analog signal positive terminals are sequentially connected by a jumper, where N is a positive integer greater than or equal to 2.
Preferably, the alternating voltage input end includes a first alternating voltage input end and a second alternating voltage input end, the first alternating voltage input end is connected to a phase terminal of the external alternating current power supply, the second alternating voltage input end is connected to a zero line terminal of the external alternating current power supply, and the power circuit breaker is connected between the direct current switch power supply and the external alternating current power supply.
Preferably, a first line inlet end of the surge protector is connected to the first ac voltage input end, a second line inlet end of the surge protector is connected to the second ac voltage input end, and the protection circuit breaker is connected between the surge protector and the dc switching power supply.
Preferably, the power supply further comprises a first indicator light, one end of the first indicator light is connected to the first alternating voltage input end, and the other end of the first indicator light is connected to the second alternating voltage input end.
Preferably, the power supply further comprises a second indicator light, one end of the second indicator light is connected to the positive electrode of the direct-current voltage output end of the direct-current switching power supply, and the other end of the second indicator light is connected to the negative electrode of the direct-current voltage output end of the direct-current switching power supply.
The utility model has the advantages that: since the technical scheme above the adoption, the utility model discloses a system signal transmission mode separately independently exports analog signal to combustible gas and toxic gas detection alarm system through dividing the line, and one of them or a plurality of detector trouble or circuit trouble can not influence the operation of system yet, avoid causing great hidden danger or even cause great incident.
Drawings
FIG. 1 is a schematic view of the electrical connection inside the case according to the embodiment of the present invention;
FIG. 2 is a bottom view of the case according to the embodiment of the present invention;
FIG. 3 is a front view of the case according to the embodiment of the present invention;
fig. 4 is a side view structural diagram of the box body in the embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.
The present invention will be further described with reference to the accompanying drawings and specific embodiments, but the present invention is not limited thereto.
A multi-channel junction box special for a combustible toxic gas detector comprises a box body 1 as shown in figure 1 and figure 2, wherein a plurality of cable gland heads 2 are arranged on the box body 1;
the box body 1 is internally provided with:
the direct current switch power supply 4 is provided with an alternating current voltage input end, and the alternating current voltage input end is connected with an external alternating current power supply through a power circuit breaker 3;
a plurality of fuse terminals 5 connected to a positive electrode 43 of a dc voltage output terminal of the dc switching power supply 4;
and a plurality of common terminals 6 connected to the negative electrode 44 of the dc voltage output terminal of the dc switching power supply 4.
A plurality of analog signal positive terminals 7 connected with external gas detection alarm system cables and external detector cables;
and the surge protector 8 is connected with the alternating-current voltage input end of the direct-current switching power supply 4 through a protection breaker 9.
In a preferred embodiment, as shown in fig. 3 and 4, the case 1 is a modular case, comprising,
the explosion-proof cavity 11 is positioned at the upper part of the box body 1, and the direct-current switching power supply 4 is arranged in the explosion-proof cavity 11;
the safety-increasing cavity 12 is positioned at the lower part of the box body 1, and the fuse terminal 5, the common terminal 6 and the analog signal positive terminal 7 are arranged in the safety-increasing cavity 12.
Specifically, the utility model discloses a box 1 increase an ampere combined type explosion-proof box for the flame proof, can effectively protect inside electrical component to avoid external environment to influence, the flame proof cavity 11 on upper portion for installation DC switching power supply 4, electrical components such as surge protector 8, the lower part increase an ampere cavity 12 and be used for installing binding post, and is more excellent, and cable glan head 2 sets up in box 1's bottom.
In a preferred embodiment, the plurality of cable gland heads 2 comprises:
an AC power lead-in port connected with an external AC power cable;
the external gas detection alarm system cable is connected with the analog signal positive terminal 7 and the common terminal 6 through the meter multi-core cable inlet;
a plurality of meter signal cable inlets through which external probe cables are connected to the analog signal positive terminal 7, the common terminal 6 and the fuse terminal 5.
Specifically, the utility model discloses a three-wire system special junction box for flammable and toxic gas detector, which sends the detector using passive 4-20mA analog quantity signal to the special passive card piece of flammable gas and toxic gas detection alarm system (hereinafter referred to as GDS), and outputs display and alarm after GDS signal processing; the wiring mode of the wire-separating system is a three-wire system, and specifically comprises a fuse terminal 5, a common terminal 6 and an analog signal positive terminal 7, wherein the fuse terminal 5 is a 24V direct-current power supply positive electrode with a fuse wiring terminal, the common terminal 6 is a power supply negative terminal and a signal negative terminal shared terminal, and the analog signal positive terminal 7 is a passive system 4-20mA analog quantity signal positive wiring terminal.
Specifically, the utility model discloses the separated time system detector of chooseing for use, separately independently output analog signal to GDS, one of them or a plurality of detector trouble or circuit trouble can not influence GDS's normal operating yet, effectively prevent to cause great hidden danger or cause great incident even, because far away when transmission distance, when exceeding 500 meters, 24V DC switch power supply 4 pressure drops great, and arrange DC switch power supply 4 power supply in the workshop only need transmission signal to GDS, just can effectively avoid the great instrument trouble that arouses of DC switch power supply 4 pressure drops.
Specifically, the utility model discloses an external 220VAC power supply adopts 24V DC switching power supply 4, with DC switching power supply 4, binding post, fuse, surge protector 8 integration in explosion-proof combination formula box 1, through multicore cable with signal transmission to GDS.
In a preferred embodiment, the common terminals 6 are arranged in a row on the first terminal connecting piece, and each adjacent common terminal 6 is connected by a jumper wire in sequence.
Specifically, in this embodiment, at least 1 signal transmission channel for transmitting signals to the GDS is taken as an example, and at most 32 signal transmission channels are taken as examples; further, the channels are divided in such a manner that the nth fuse terminal 5 and the 2n-1 th common terminal 6 constitute an nth channel, that is, the first fuse terminal 5 and the first common terminal 6 constitute a first channel, the second fuse terminal 5 and the third common terminal 6 constitute a second channel, the third fuse terminal 5 and the fifth common terminal 6 constitute a third channel, and so on.
In a preferred embodiment, the analog signal positive terminals 7 are arranged in a row on the second terminal connecting sheet, and every N adjacent analog signal positive terminals 7 are connected by a jumper wire in sequence; in this embodiment, taking N as 2 as an example, each two adjacent positive terminals 7 of the analog signal are connected by a jumper, so as to divide the channels.
Specifically, the analog signal positive terminal 7 is combined to form a signal loop through the common terminal 6, the signal jumps and distinguishes channels through a jumper wire on the analog signal positive terminal 7 and a jumper wire on the common terminal 6, the common terminal 6 is all short-circuited through the jumper wires to realize signal negative and power negative and sharing, the analog signal positive terminal and the common terminal 6 are distinguished and then wired, the analog signal positive terminal 7 is divided into a (m +1)/2 channel by combining the m-th analog signal positive terminal 7 and the m + 1-th analog signal positive terminal 7, namely, the first analog signal positive terminal 7 and the second analog signal positive terminal 7 are combined into a first channel, the third analog signal positive terminal 7 and the fourth analog signal positive terminal 7 are combined into a second channel, the fifth analog signal positive terminal 7 and the sixth analog signal positive terminal 7 are combined into a third channel, and so on; the channel division mode of the common terminal 6 is consistent with the channel division mode of the analog signal positive terminal 7.
In a preferred embodiment, the use process of the special junction box for the multi-channel wire-splitting flammable toxic gas detector is that 220VAC Uninterruptible Power Supply (UPS) power supply cables led out from a GDS, namely external AC power supply cables are led into an AC power supply lead-in port in the box through a cable gland 2 at the bottom of the box body 1 and connected; introducing a three-core instrument signal cable led out from a field branching system detector into an analog signal wiring terminal, a common terminal 6 and a fuse terminal 5 in a box through an instrument signal cable inlet, and then connecting the three-core instrument signal cable after distinguishing channels; and introducing the instrument multi-core cable led out from the analog passive signal system clamping piece terminal of the GDS into the analog signal positive terminal 7 and the common terminal 6 in the box through an instrument multi-core cable introducing port, distinguishing channels and then wiring.
In a preferred embodiment, the ac voltage input terminals of the dc switching power supply 4 include a first ac voltage input terminal 41 and a second ac voltage input terminal 42, the first ac voltage input terminal 41 is connected to the phase terminal 13 of the external ac power supply, the second ac voltage input terminal 42 is connected to the neutral terminal 14 of the external ac power supply, and the power circuit breaker 3 is connected between the dc switching power supply 4 and the external ac power supply.
In a preferred embodiment, a first line inlet end of the surge protector 8 is connected with a first alternating-current voltage input end 41 of the direct-current switching power supply 4, a second line inlet end of the surge protector 8 is connected with a second alternating-current voltage input end 42 of the direct-current switching power supply 4, and the protection breaker 9 is connected between the surge protector 8 and the direct-current switching power supply 4; preferably, the surge protector 8 is used to prevent outdoor installation instruments or petrochemical tank field detectors from being affected by lightning strikes.
In a preferred embodiment, the power supply further comprises a first indicator light 15, one end of the first indicator light 15 is connected to the first ac voltage input terminal 41 of the dc switch power supply 4, and the other end of the first indicator light 15 is connected to the second ac voltage input terminal 42 of the dc switch power supply 4.
In a preferred embodiment, the device further comprises a second indicator light 16, one end of the second indicator light 16 is connected to the positive pole 43 of the dc voltage output terminal of the dc switching power supply 4, and the other end of the second indicator light 16 is connected to the negative pole 44 of the dc voltage output terminal of the dc switching power supply 4.
Specifically, first pilot lamp 15 is alternating current power supply pilot lamp, second pilot lamp 16 is direct current power supply pilot lamp, power circuit breaker 3 is closed, first pilot lamp 15 lights, direct current switch power supply 4 begins working, second pilot lamp 16 lights, protection circuit breaker 9 is closed, surge protector 8 normally works, the detector passes through common terminal 6, fuse terminal 5, analog signal positive terminal 7 obtains power supply and signal passback, and through common terminal 6, fuse terminal 5, the jumper wire that analog signal positive terminal 7 links to each other makes the analog quantity signal far reach GDS analog quantity passive system fastener and be used for signal processing, and show on GDS monitoring station, report to the police etc..
The above description is only an example of the preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and those skilled in the art should be able to realize the equivalent alternatives and obvious variations of the present invention.
Claims (9)
1. A multi-channel junction box special for a branch-made combustible toxic gas detector is characterized by comprising a box body, wherein a plurality of cable gland heads are arranged on the box body;
the box is internally provided with:
the direct current switch power supply is provided with an alternating current voltage input end, and the alternating current voltage input end is connected with an external alternating current power supply through a power supply breaker;
the fuse terminals are connected with the positive electrode of the direct-current voltage output end of the direct-current switching power supply;
the common terminals are connected with the negative electrode of the direct-current voltage output end of the direct-current switching power supply;
the analog signal positive terminals are connected with an external gas detection alarm system cable and an external detector cable;
and the surge protector is connected with the alternating voltage input end through a protective breaker.
2. The special junction box for a flammable and toxic gas detector according to claim 1, wherein the box body is a combined box body comprising,
the explosion-proof cavity is positioned at the upper part of the box body, and the direct-current switching power supply is arranged in the explosion-proof cavity;
the safety increasing cavity is located on the lower portion of the box body, and the fuse terminal, the public terminal and the analog signal positive terminal are installed in the safety increasing cavity.
3. The special junction box for a flammable and toxic gas detector as claimed in claim 2, wherein the plurality of cable gland heads includes:
an AC power lead-in port connected with an external AC power cable;
the external gas detection alarm system cable is connected with the analog signal positive terminal and the common terminal through the meter multi-core cable lead-in port;
a plurality of meter signal cable inlets through which the external probe cable is connected the analog signal positive terminal, the common terminal and the fuse terminal.
4. The special junction box for a flammable and toxic gas detector as claimed in claim 1, wherein the common terminals are arranged in a row on the first terminal connecting piece, and each adjacent common terminal is connected sequentially by a jumper wire.
5. The special junction box for a combustible toxic gas detector as claimed in claim 1, wherein the analog signal positive terminals are arranged on the second terminal connecting piece in a row, every N adjacent analog signal positive terminals are connected sequentially by jumpers, wherein N is a positive integer greater than or equal to 2.
6. The special junction box for a flammable and toxic gas detector as claimed in claim 1, wherein the ac voltage input terminals include a first ac voltage input terminal and a second ac voltage input terminal, the first ac voltage input terminal is connected to a phase terminal of the external ac power source, the second ac voltage input terminal is connected to a neutral terminal of the external ac power source, and the power circuit breaker is connected between the dc switching power source and the external ac power source.
7. The special junction box for a combustible toxic gas detector as claimed in claim 6, wherein a first line inlet end of the surge protector is connected with the first AC voltage input end, a second line inlet end of the surge protector is connected with the second AC voltage input end, and the protection breaker is connected between the surge protector and the DC switching power supply.
8. The special junction box for a flammable and toxic gas detector as claimed in claim 6, further comprising a first indicator light, wherein one end of the first indicator light is connected to the first AC voltage input terminal, and the other end of the first indicator light is connected to the second AC voltage input terminal.
9. The special junction box for a flammable and toxic gas detector as claimed in claim 1, further comprising a second indicator light, wherein one end of the second indicator light is connected to the positive pole of the dc voltage output terminal of the dc switching power supply, and the other end of the second indicator light is connected to the negative pole of the dc voltage output terminal of the dc switching power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221294804.3U CN217484295U (en) | 2022-05-25 | 2022-05-25 | Special junction box for multi-channel branching system combustible toxic gas detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221294804.3U CN217484295U (en) | 2022-05-25 | 2022-05-25 | Special junction box for multi-channel branching system combustible toxic gas detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217484295U true CN217484295U (en) | 2022-09-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221294804.3U Active CN217484295U (en) | 2022-05-25 | 2022-05-25 | Special junction box for multi-channel branching system combustible toxic gas detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217484295U (en) |
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2022
- 2022-05-25 CN CN202221294804.3U patent/CN217484295U/en active Active
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