CN209745350U - Intelligent water meter junction box - Google Patents

Abstract

The utility model provides an intelligence water gauge terminal box belongs to intelligent water gauge technical field. It has solved the problem that prior art exists the risk of being struck by lightning, and the security is low. This intelligence water gauge terminal box includes the casing, is provided with the circuit board in the casing, install the lightning protection circuit on the circuit board, be used for the input wiring end of being connected with the water gauge electricity and be used for the output wiring end of being connected with the collector electricity, the lightning protection circuit include resistance R1, resistance R2, the transient suppression diode D1 of being connected with input wiring end and with the piezo-resistor RV1 that output wiring end is connected, transient suppression diode D1's one end and piezo-resistor RV 1's one end series resistance R1, transient suppression diode D1's the other end and piezo-resistor RV 1's other end series resistance R2. This intelligence water gauge terminal box can improve the security that the water gauge used.

Description

Intelligent water meter junction box

Technical Field

The utility model belongs to the technical field of intelligent water gauge, a intelligence water gauge terminal box is related to.

Background

The meter reading system of the water meter is divided into a wireless meter reading mode and a wired meter reading mode. The wired meter reading mode of the ultrasonic water meter comprises a 485 transmission mode, an M-BUS transmission mode and the like, and two to four wires are connected to a receiving end of a meter reading system.

Whether the wired water meter is used safely or not is directly related to the life of people and the management level of a water department operation department. Firstly, because the communication lines are all longer, the external electromagnetic interference and the voltage noise output by the acquisition equipment can damage the water meter, so that the metering precision of the meter is inaccurate or the components of the water meter are damaged; secondly, because the communication lines of the same floor are connected together, when a certain meter fails, all meters must be detached and checked once, which brings great trouble to maintenance personnel; thirdly, due to the consideration of the cost and the size of the meter, a lightning protection structure cannot be arranged on the meter, and the risk of being struck by lightning exists.

In order to solve the problems, the existing Chinese patent document discloses an intelligent water meter junction box which comprises a box cover, a box body and a junction base; the box cover and the box body are enclosed into a closed whole, and the box cover and the box body wrap the wire holder; the box body comprises a metal protective sleeve fixing hole, a cavity, a main line interface hole, a main line wiring terminal and a main line fixing clamp position. The utility model discloses a through binding post in disorder intelligent water gauge communication line neatly arrange in the terminal box, solved the disorder shortcoming of intelligent water gauge communication line, have pleasing to the eye advantage of big side, through orderly wiring simultaneously, be of value to when the problem appears, can be timely and quick processing, but this intelligent water gauge wiring does not possess the effect of lightning protection, and intelligent water gauge still exists the risk by the thunderbolt, and the security is low.

Disclosure of Invention

The utility model aims at the above-mentioned problem that prior art exists, provide an intelligence water gauge terminal box, the technical problem that this intelligence water gauge terminal box will solve is: how to improve the safety of water meter use

The purpose of the utility model can be realized by the following technical proposal: the utility model provides an intelligence water gauge terminal box, the terminal box includes the casing, be provided with the circuit board in the casing, its characterized in that, install lightning protection circuit on the circuit board, be used for the input connection terminal of being connected with the water gauge electricity and be used for the output connection terminal of being connected with the collector electricity, lightning protection circuit include resistance R1, resistance R2, with transient suppression diode D1 that input connection terminal is connected and with piezo-resistor RV1 that output connection terminal is connected, transient suppression diode D1's one end and piezo-resistor RV 1's one end series resistance R1, diode D1's the other end and piezo-resistor RV 1's other end series resistance R2 are suppressed in the transient.

This intelligence water gauge terminal box is when using, the electric wire of water gauge is connected with the input terminal in the casing, the electric wire of collector is connected with the output terminal in the casing, when the thunder and lightning overvoltage appears in the circuit, transient suppression diode D1 bears high transient energy and strikes, absorb surge current voltage fast, piezo-resistor RV1 carries out the voltage clamping, absorb unnecessary electric current, make piezo-resistor RV1 both ends voltage descend rapidly, unnecessary voltage discharges through resistance R1 and resistance R2, thereby make the water gauge of connecting avoid the impact of overvoltage, this intelligence water gauge terminal box suppresses diode D1 and piezo-resistor RV1 through the transient and realizes the second grade lightning protection, when using, the security that the water gauge used has effectively been improved.

In the above-mentioned intelligent water meter junction box, the casing includes the base and has lower shed and the open-ended upper shield, the lower extreme symmetry of two relative inside walls of upper shield is equipped with the sliding tray, the activity of the both sides limit of base is pegged graft in the sliding tray that corresponds. The upper cover is movably connected with the base, so that the junction box is convenient to open when the circuit is connected and maintained, and the convenience and the safety of the use of the junction box are improved.

In the above-mentioned intelligent water meter junction box, guide angles are provided on both sides of the front portion of the base. The setting of guide angle is convenient for the base to insert in the sliding tray of upper shield.

In the intelligent water meter junction box, the rear part of the base is vertically provided with a baffle plate used for covering the opening at the side of the upper cover, and the baffle plate is provided with a through hole for the electric wire of the water meter and the electric wire of the collector to penetrate. The baffle is provided with a through hole, so that the water meter and the collector can be conveniently connected with the lightning protection circuit.

In the above-mentioned intelligent water meter junction box, the number of the through holes is two. The two through holes are arranged, so that the electric wire of the water meter and the electric wire of the collector are respectively connected with the lightning protection circuit through the respective through holes, the wiring accuracy is improved, and the use safety of the junction box is improved.

In the above junction box for intelligent water meters, the base is provided with a mounting hole for fixedly connecting with a wall.

In the above junction box for an intelligent water meter, the base is provided with a mounting seat for mounting and fixing the circuit board. The base passes through the mount pad to be connected with the circuit board, has guaranteed the stability of circuit board installation, and then ensures the security that the lightning protection circuit was used.

Compared with the prior art, this intelligence water gauge junction box in installation lightning protection circuit can prevent that the water gauge that the terminal box connects from preventing the thunderbolt, improves the security that the water gauge used, and the structural design of terminal box is when being convenient for water gauge and collector wiring simultaneously, has still further improved the security.

Drawings

Fig. 1 is a schematic view of the lightning protection circuit of the present invention.

Fig. 2 is a schematic structural diagram of the housing of the present invention.

Fig. 3 is a schematic structural view of the upper cover of the present invention.

Fig. 4 is a schematic structural diagram of the base of the present invention.

In the figure, 1, a housing; 2. an upper cover; 2a, a sliding groove; 3. a base; 3a, a baffle plate; 3b, through holes; 3c, a mounting seat; 3d, mounting holes; 3e, a guide angle; 4. a circuit board; 5. a lightning protection circuit; 6. an input terminal; 7. and an output terminal.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1 and 2, the intelligent water meter junction box comprises a housing 1, a circuit board 4 is arranged in the housing 1, a lightning protection circuit 5 is mounted on the circuit board 4, an input terminal 6 used for being connected with an electric wire of a water meter and an output terminal 7 used for being connected with an electric wire of a collector, the lightning protection circuit 5 comprises a resistor R1, a resistor R2, a transient suppression diode D1 connected with the input terminal 6 and a piezoresistor RV1 connected with the output terminal 7, one end of the transient suppression diode D1 is connected with one end of a piezoresistor RV 3635 1 in series, and the other end of the transient suppression diode D8645 is connected with the other end of the piezoresistor R1 in series to form a resistor R2.

Preferably, the input terminal 6 comprises two input wires connected to the electrical wires of the water meter and the output terminal 7 comprises two output wires connected to the electrical wires of the collector. Two input lines are located the same side of circuit board 4, and two output lines are located the same side of circuit board 4, and input line and output line are located the both sides of lightning protection circuit 5 on circuit board 4, are convenient for distinguish the wiring.

As another preferred solution, the input terminal 6 comprises two input terminals connected to the electric wire of the water meter, and the output terminal 7 comprises two output terminals connected to the electric wire of the collector. The input terminal and the output terminal are located on both sides of the lightning protection circuit 5 on the circuit board 4.

Preferably, the values of the resistor R1 and the resistor R2 range from 4.3 Ω to 5.1 Ω.

As the preferred scheme, the output terminal 7 is connected with the collector through an M-BUS line, and the input terminal 6 is connected with the water meter through the M-BUS line.

Preferably, as shown in fig. 2 and 3, the housing 1 includes a base 3 and an upper cover 2 having a lower opening and a side opening, the lower ends of two opposite inner side walls of the upper cover 2 are symmetrically provided with sliding grooves 2a, and two side edges of the base 3 are movably inserted into the corresponding sliding grooves 2 a. Wherein, the sliding groove 2a comprises a first side wall and a second side wall positioned at the lower opening of the upper cover, and the length of the first side wall is shorter than that of the second side wall. The upper cover 2 is movably connected with the base 3, so that the junction box is convenient to open when the circuit is connected and maintained, and the convenience and the safety of the use of the junction box are improved.

As shown in fig. 4, it is preferable that both sides of the front portion of the base 3 have guide corners 3 e. The guide angle 3e is provided to facilitate the base 3 to be inserted into the slide groove 2a of the upper cover 2.

As the preferred scheme, the rear part of base 3 is provided with perpendicularly and is used for covering baffle 3a at the opening part of upper shield 2 side, offer the through-hole 3b that is used for supplying the electric wire of water gauge and the electric wire of collector to penetrate on the baffle 3 a. The baffle 3a is provided with a through hole 3b, so that the water meter and the collector can be conveniently connected with the lightning protection circuit 5.

Preferably, the number of the through holes 3b is two. Set up two through-holes 3b, can make the electric wire of water gauge and the electric wire of collector be connected with lightning protection circuit 5 through respective through-hole 3b respectively, improve the accuracy nature of wiring, improve the security that the terminal box used.

Preferably, the base 3 has a mounting hole 3d for fixedly connecting with a wall. The arrangement of the mounting hole 3d can fix the junction box on a wall body, and the stability and the safety of the junction box in use are guaranteed.

Preferably, the base 3 has a mounting seat 3c for mounting and fixing the circuit board 4. The base 3 is connected with the circuit board 4 through the mounting seat 3c, so that the stability of the installation of the circuit board 4 is ensured, and the application safety of the lightning protection circuit 5 is further ensured. In addition, the installation seat 3c has a certain height, and the arrangement can ensure that the lightning protection circuit 5 on the circuit board 4 has a heat dissipation space, thereby improving the safety.

This intelligence water gauge terminal box when using, slides and pushes away upper shield 2, and the electric wire of water gauge passes one of them through-hole 3b and input wiring end 6 of base 3 and is connected, and the electric wire of collector passes another through-hole 3b and output wiring end 7 of base 3 and is connected, and after the circuit connection is good, the slip pushes upper shield 2, constitutes a casing 1, can play dirt-proof effect. When the thunder and lightning overvoltage appears in the circuit, transient suppression diode D1 bears the impact of high transient energy, surge current voltage is absorbed quickly, voltage clamping is carried out on piezoresistor RV1, redundant current is absorbed, the voltage at two ends of piezoresistor RV1 is reduced rapidly, redundant voltage is discharged through resistor R1 and resistor R2, thereby the voltage at two ends of the connected water meter is also reduced rapidly, the water meter is prevented from the impact of overvoltage, the secondary lightning protection is realized by the intelligent water meter junction box through transient suppression diode D1 and piezoresistor RV1, and when the intelligent water meter junction box is used, the use safety of the water meter is effectively improved.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims (7)

1. The utility model provides an intelligence water gauge terminal box, the terminal box includes casing (1), be provided with circuit board (4) in casing (1), its characterized in that, install lightning protection circuit (5) on circuit board (4), be used for with the input wiring end (6) of the connection of electric lines of water gauge and be used for output wiring end (7) with the connection of electric lines of collector, lightning protection circuit (5) including resistance R1, resistance R2, with transient suppression diode D1 that input wiring end (6) are connected and with piezo-resistor RV1 that output wiring end (7) are connected, transient suppression diode D1's one end and piezo-resistor R1 of RV1, the other end of transient suppression diode D1 and piezo-resistor RV 1's other end series resistance R2.

2. An intelligent water meter junction box according to claim 1, wherein the housing (1) comprises a base (3) and an upper cover (2) with a lower opening and a side opening, sliding grooves (2a) are symmetrically formed at the lower ends of two opposite inner side walls of the upper cover (2), and two side edges of the base (3) are movably inserted into the corresponding sliding grooves (2 a).

3. An intelligent water meter junction box according to claim 2, wherein the front of the base (3) has guide angles on both sides.

4. An intelligent water meter junction box according to claim 2 or 3, wherein a baffle plate (3a) for covering the opening at the side of the upper cover (2) is vertically arranged at the rear part of the base (3), and a through hole (3b) for allowing an electric wire of the water meter and an electric wire of the collector to penetrate is formed in the baffle plate (3 a).

5. An intelligent water meter junction box according to claim 4, wherein the number of said through holes (3b) is two.

6. An intelligent water meter junction box according to claim 2 or 3, wherein the base (3) is provided with a mounting hole (3d) for fixed connection with a wall.

7. An intelligent water meter junction box according to claim 2 or 3, wherein the base (3) is provided with a mounting seat (3c) for mounting and fixing the circuit board (4).