Flow divider

Abstract

The utility model discloses a shunt, which is used for being electrically connected with a circuit and detecting current flowing through the circuit, the shunt comprises two connecting conductors and an alloy resistance tape, and the two connecting conductors are respectively used for leading in and leading out current; the alloy resistance tape is connected with the two connecting conductors, a protective layer is arranged on the surface of the alloy resistance tape, and the resistivity of the protective layer is equal to or smaller than that of the alloy resistance tape. And the protective layer is a nickel layer. And the thickness of the alloy resistance tape is smaller than that of the two connecting conductors. The surface of the alloy resistance tape contacted with the outside is provided with the protective layer with the resistivity equal to or smaller than that of the alloy resistance tape, so that the anti-oxidation and anti-corrosion performance of the surface of the alloy resistance tape can be effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of shunts, in particular to a shunt. Background Art

[0002] A shunt is a device commonly used to detect direct current. Whenever direct current flows through a shunt, a voltage drop occurs. According to Ohm's law, the voltage drop across the shunt forms a measurement of the current flowing through the shunt, which will be displayed in the DC reading on the ammeter. At present, the resistors in most existing shunts are usually installed by directly exposing them in the use environment, and such an installation method will aggravate the oxidation of the outer surface of the resistor or cause the outer surface of the resistor to be corroded. When the outer surface of the resistor is oxidized or corroded, the resistance value of the resistor will change, thereby greatly reducing the accuracy of the data measured by the resistor. Utility Model Content

[0003] The main purpose of the utility model is to provide a shunt, aiming to solve the problem that the resistance directly exposed in the use environment is prone to oxidation and corrosion, resulting in reduced accuracy of measured data.

[0004] In order to achieve the above object, the utility model provides a flow divider, the flow divider comprising:

[0005] two connecting conductors; and

[0006] An alloy resistance strip, the alloy resistance strip connects the two connection conductors, at least part of the surface of the alloy resistance strip is provided with a protective layer, and the resistivity of the protective layer is equal to or less than the resistivity of the alloy resistance strip.

[0007] In one embodiment, the protective layer is a nickel layer.

[0008] In one embodiment, the alloy resistance band is made of manganese-copper alloy.

[0009] In one embodiment, the protective layer is provided on the surface of the alloy resistance strip by electroplating, welding or painting.

[0010] In one embodiment, the thickness of the alloy resistance strip is smaller than the thickness of the two connecting conductors.

[0011] In one embodiment, the alloy resistance strip is connected flush with the same side of the two connecting conductors.

[0012] In one embodiment, the alloy resistance strip and the two connecting conductors form a groove, and the alloy resistance strip is provided with the protective layer on at least one surface of the side where the groove is located.

[0013] In one embodiment, at least one surface of the groove is provided with a window.

[0014] In one embodiment, the two connecting conductors are provided with mounting holes along the thickness direction thereof, and the mounting holes are located at the parts of the two connecting conductors away from the alloy resistance bands.

[0015] In one embodiment, the two connecting conductors are symmetrically provided with connecting portions close to one end of the alloy resistance strip.

[0016] In one embodiment, the protective layer is provided on the surfaces of the two connecting conductors and the alloy resistance strip.

[0017] The technical solution of the utility model is to provide a protective layer on the outer peripheral surface of the alloy resistance band installed between two connecting conductors for importing and exporting current, and the resistivity of the protective layer is lower than that of the alloy resistance band. The protective layer can not only effectively prevent the oxidation of the outer peripheral surface of the alloy resistance band in contact with the outside world, but also effectively prevent self-corrosion. Moreover, since the resistivity of the protective layer is lower than that of the alloy resistance band, when the shunt is put into use, it will not increase the impedance of the alloy resistance band. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0019] Figure 1 This is a structural schematic diagram of an embodiment of the flow divider of the utility model;

[0020] Figure 2 It is a structural schematic diagram of another embodiment of the flow divider of the utility model;

[0021] Figure 3 It is a structural schematic diagram of another embodiment of the flow divider of the utility model;

[0022] Description of Figure Numbers:

[0023]

[0024]

[0025] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0028] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0029] A shunt is a device commonly used to detect direct current. Whenever direct current flows through a shunt, a voltage drop occurs. According to Ohm's law, the voltage drop across the shunt forms a measurement of the current flowing through the shunt, which will be displayed in the DC reading on the ammeter. At present, the resistors in most existing shunts are usually installed by directly exposing them in the use environment, and such an installation method will aggravate the oxidation of the outer surface of the resistor or cause the outer surface of the resistor to be corroded. When the outer surface of the resistor is oxidized or corroded, the resistance value of the resistor will change, thereby greatly reducing the accuracy of the data measured by the resistor.

[0030] The utility model provides a flow divider.

[0031] Reference Figures 1 to 3 , Figure 1The utility model discloses a shunt 100, which is used to electrically connect with a circuit and detect the current flowing through the circuit. The shunt 100 includes two connecting conductors 110 and an alloy resistance strip 120, wherein the two connecting conductors 110 are used to import and export current respectively; the alloy resistance strip 120 is used to connect the two connecting conductors 110, and a protective layer 130 is provided on the surface of the alloy resistance strip 120. The surface refers to the surface of the alloy resistance strip 120 exposed on the outer surface and in contact with the outside world after the two connecting conductors 110 are connected. The resistivity of the protective layer 130 is less than the resistivity of the alloy resistance strip 120. Figure 1 As shown, the shunt includes two connecting conductors 110, and the connecting conductors 110 can be made of copper bars, aluminum bars or alloy materials. Of course, the connecting conductors 110 are mainly used to be connected in parallel to the circuit to be electrically connected to the circuit, so the two connecting conductors 110 are used to import or export current respectively, and the opposite sides of the two connecting conductors 110 are connected with alloy resistance strips 120. Of course, the two connecting conductors 110 can also be set at the same end of the same side of the alloy resistance strip 120. In this embodiment, the alloy resistance strip 120 adopts manganese-copper alloy, and the connecting conductor 110 adopts copper bars. Since the alloy resistance strip 120 will generate heat when it is put into use, this situation will aggravate the oxidation or corrosion of the outer surface of the alloy resistance strip 120, so in order to In order to improve the anti-oxidation and anti-corrosion performance of the alloy resistance strip 120 when it is put into use, a protective layer 130 is provided on its outer surface. The protective layer 130 can be sprayed on, electroplated, or brushed on. In order to prevent the impedance of the alloy resistance strip 120 from increasing, the resistivity of the protective layer 130 must be less than the resistivity of the alloy resistance strip 120. By setting the protective layer 130 and using a material with a resistivity equal to or lower than the resistivity of the alloy resistance strip 120, the protective layer 130 can not only prevent the outer surface of the alloy resistance strip 120 from oxidation or corrosion, but also will not increase the impedance of the alloy resistance strip 120, nor affect the heat dissipation of the alloy resistance strip 120.

[0032] In one embodiment, if Figure 1-3 As shown, the protective layer 130 is a nickel layer. The nickel layer not only has a good anti-oxidation function but also has a function of preventing oxygen from reacting with the metal during the welding process. Therefore, in this embodiment, the protective layer 130 is a nickel layer, and of course, other materials with good anti-oxidation and anti-corrosion properties, such as a tin layer, can also be used.

[0033] Furthermore, the protective layer 130 is provided on the surface of the alloy resistor strip 120 by electroplating, welding or painting. In order to further enhance the overall protective effect of the protective layer 130 on the alloy resistor strip 120, the protective layer 130 is provided on the surface of the alloy resistor strip 120 by electroplating, painting or the like, thereby achieving overall protection of the alloy resistor strip 120, thereby enhancing the overall anti-oxidation or anti-corrosion performance of the alloy resistor strip 120.

[0034] In one embodiment, if Figure 1-3 As shown, the thickness of the alloy resistance band 120 is less than the thickness of the two connecting conductors 110. Since the thickness of the alloy resistance band 120 is less than the thickness of the two connecting conductors 110, when the alloy resistance band 120 is connected to the two connecting conductors 110, the alloy resistance band 120 is connected flush with the same side of the two connecting conductors 110. Since the thickness of the alloy resistance band 120 is less than the thickness of the two connecting conductors 110, a groove with a height difference is formed on the opposite side of the connection. When the alloy resistance band 120 is actually put into use, the groove can effectively improve the heat dissipation effect of the alloy resistance band 120. When the alloy resistance band 120 and the two connecting conductors 110 are installed in the circuit for use, the alloy resistance band 120 can contact the gas in the external environment through the groove. When the alloy resistance band 120 contacts the gas flowing through the groove, heat exchange is performed, thereby achieving the effect of heat dissipation. Through such a setting, the alloy resistance band 120 has a better heat dissipation function when used in conjunction with the two connecting conductors 110.

[0035] In one embodiment, if Figure 1-3 As shown, the alloy resistance belt 120 is connected flush with the same side of the two connection conductors 110. In this embodiment, the alloy resistance belt 120 is connected in the above-mentioned manner by being connected flush with the same side of the two connection conductors 110. It can also be installed relative to the ground when the two connection conductors 110 are connected to the circuit in a ground-attached manner, so that the alloy resistance belt 120 and the installation surface can enclose a through hole to form a through hole, and the gas in the external environment can flow through the through hole. When the external gas flows through the through hole, it will exchange heat with the alloy resistance belt 120, so that the alloy resistance belt 120 can improve its own heat dissipation effect through the through hole.

[0036] In one embodiment, if Figure 1-3 As shown, the alloy resistance strip 120 and the two connecting conductors 110 form a groove, and the alloy resistance strip 120 is provided with a protective layer 130 on at least one surface of the groove. The groove can effectively prevent the heat of the alloy resistance strip 120 from being conducted to the two connecting conductors 110 and increase the contact area between the alloy resistance strip 120 and the external gas, thereby indirectly improving the effect of heat dissipation of the alloy resistance strip 120 to the outside.

[0037] Specifically, in order to ensure that it has anti-oxidation and corrosion resistance properties, since the side where the groove is located is directly exposed to the air, a protective layer 130 must be provided on at least one side of the surface where the groove is located.

[0038] More specifically, in order to facilitate the installation of other identification materials, a window can be opened on the side surface where the groove is located for later installation of the identification, while the remaining part is protected by a protective layer 130, and the part with the window is protected by the identification installed later.

[0039] In order to improve the overall anti-oxidation or anti-corrosion performance of the alloy resistance strip 120, a protective layer 130 can be laid on the entire outer surface of the alloy resistance strip 120, so that the anti-oxidation or anti-corrosion performance of other outer surfaces of the alloy resistance strip 120 except the above-mentioned grooves can be improved, thereby greatly improving the service life of the alloy resistance strip 120.

[0040] In one embodiment, if Figure 1-3 As shown, the two connecting conductors 110 are penetrated with mounting holes 150 along the thickness direction thereof, and the mounting holes 150 are located at the parts of the two connecting conductors 110 far away from the alloy resistance belt 120. In order to facilitate the connection of the two connecting conductors 110 with the circuit, mounting holes 150 are respectively opened along the thickness direction of the parts of the two connecting conductors 110 far away from the alloy resistance belt 120. Because of the opening of the mounting holes 150, when the two connecting conductors 110 are connected to the circuit, they can be fixedly connected by using screws. Of course, when the mounting holes 150 are not opened, the two connecting conductors 110 can be connected to the circuit by welding or other methods. The opening of the mounting holes 150 far away from the alloy resistance belt 120 is mainly due to the consideration of the heat conduction problem of the alloy resistance belt 120.

[0041] In one embodiment, if Figure 1-3 As shown, the two connecting conductors 110 are symmetrically provided with connecting parts at one end close to the alloy resistance strip 120. The connecting part is mainly used to connect with the equipment of the detection circuit, and the connecting part is arranged at one end close to the alloy resistance strip 120 mainly for the purpose of accurately measuring the value of the alloy resistance strip 120, so as to obtain more accurate data.

[0042] In one embodiment, if Figure 1 , 2As shown in Figure 3, the connection part is a plug hole 160 or a plug connector 170. The connection part can be two plug holes 160 symmetrically opened at one end of the two connecting conductors 110 close to the alloy resistance belt 120. When an ammeter is externally connected, the connecting wire of the ammeter can be inserted into the plug hole 160 to connect with the two connecting conductors 110. The connection part can also be a plug connector 170. Since the plug connector 170 is protruding, when the ammeter is connected to it, it can be clamped by using the clamping end on the ammeter connecting wire. In addition, because the plug connector 170 protrudes from the two connecting conductors 110, and the thickness of the alloy resistance belt 120 and the two connecting conductors 110 are inconsistent, a groove is formed. The formation of the groove will increase the distance between the plug connector 170 and the alloy resistance belt 120, so it can further reduce the influence of the heat dissipation of the alloy resistance belt 120 on itself, so that the data measured by the ammeter is more accurate.

[0043] In one embodiment, if Figure 3 As shown, the plug connector 170 can be installed in the plug hole 160. The plug connector 170 can be fixed to the two connecting conductors 110 by welding, or can be inserted into the plug hole 160 by threading after the connecting conductor 110 is provided with the plug hole 160.

[0044] In another embodiment, the surfaces of the two connecting conductors 110 and the alloy resistance belt 120 are provided with a protective layer 130. In order to prevent oxidation or corrosion problems on the exposed surfaces of the connecting conductors 110 and the alloy resistance belt 120, in this embodiment, the outer surfaces of the two connecting conductors 110 and the alloy resistance belt 120 are provided with a protective layer 130, and the protective layer 130 can improve the oxidation and corrosion of the exposed surfaces of the two connecting conductors 110 and the alloy resistance belt 120, thereby greatly improving the service life of the two connecting conductors 110 and the alloy resistance belt 120.

[0045] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A shunt, It is characterized in that The diverter comprises: two connecting conductors; and An alloy resistance strip, wherein the alloy resistance strip connects the two connection conductors, and at least a portion of the surface of the alloy resistance strip is provided with a protective layer, and the resistivity of the protective layer is equal to or less than the resistivity of the alloy resistance strip.

2. The flow divider according to claim 1, It is characterized in that The protective layer is a nickel layer.

3. The flow divider according to claim 2, It is characterized in that The alloy resistance band is made of manganese-copper alloy.

4. The flow divider according to claim 3, It is characterized in that The protective layer is arranged on the surface of the alloy resistance band by electroplating, welding or painting.

5. The flow divider according to claim 1, It is characterized in that The thickness of the alloy resistance band is smaller than the thickness of the two connecting conductors.

6. The flow divider according to claim 5, It is characterized in that The alloy resistance belt is connected flush with the same side of the two connecting conductors.

7. The flow divider according to claim 6, It is characterized in that The alloy resistance band and the two connecting conductors form a groove, and the alloy resistance band is provided with the protective layer on at least one surface of the groove.

8. The flow divider according to claim 1, It is characterized in that The two connecting conductors are provided with mounting holes along the thickness direction thereof, and the mounting holes are located at the parts of the two connecting conductors away from the alloy resistance bands.

9. The flow divider according to claim 1, It is characterized in that The two connecting conductors are symmetrically provided with connecting parts close to one end of the alloy resistance strip.

10. The flow divider according to any one of claims 1 to 9, It is characterized in that The surfaces of the two connecting conductors and the alloy resistance belt are both provided with the protective layer.

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