CN209746024U - Galvanometer with self-protection function - Google Patents
Galvanometer with self-protection function Download PDFInfo
- Publication number
- CN209746024U CN209746024U CN201822023495.6U CN201822023495U CN209746024U CN 209746024 U CN209746024 U CN 209746024U CN 201822023495 U CN201822023495 U CN 201822023495U CN 209746024 U CN209746024 U CN 209746024U
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- galvanometer
- terminal
- disc
- resistance
- rheostat
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Abstract
The utility model relates to a galvanometer with self preservation protects function belongs to electrical instrument and meter technical field. Including the galvanometer body, be equipped with pointer gauge outfit, disc line-wound rheostat, galvanometer terminal and sensitivity mark line on the galvanometer body, two galvanometer terminals are connected respectively at the both ends of pointer gauge outfit, and the pointer gauge outfit passes through the galvanometer terminal and connects in parallel with disc line-wound rheostat, the sensitivity of galvanometer has been represented to the directional sensitivity mark line of pivot knob groove on the pivot knob of disc line-wound rheostat. The utility model has the advantages that: the self-made disc wire-wound rheostat is low in cost and simple to manufacture. The self-made disc wire-wound rheostat has the advantages that the variable resistance can be continuously adjusted between 0, R and infinity, the shunt capacity is high, the shunt adjustment is convenient, the galvanometer is protected to the maximum extent, and the phenomena that the galvanometer is burnt out, a pointer is bent or the pointer cannot return due to excessive deflection and the like caused by too large current to be detected are effectively prevented from occurring.
Description
Technical Field
The utility model relates to a galvanometer with self preservation protects function belongs to electrical instrument and meter technical field.
Background
At present, direct current galvanometers widely used in engineering measurement, scientific research and experimental teaching generally comprise a magnetoelectric system galvanometer and a photoelectric amplification type galvanometer and the like, wherein the magnetoelectric system galvanometer is most commonly used, and the application range is widest. Magneto-electric system galvanometer by the gauge outfit, many grades of shunt resistance, many grades of terminals are constituteed, because many grades of shunt resistance's resistance is certain, consequently, the reposition of redundant personnel effect is also certain, generally when using galvanometer measuring current, because it is unknown to wait to detect the electric current size, often select the terminal access circuit of the minimum gear of galvanometer sensitivity earlier in order to protect the galvanometer, nevertheless, the electric current that still often appears flowing through the galvanometer exceeds its maximum scale, lead to the galvanometer to be burnt out, the pointer is bent or the emergence of the phenomenon such as pointer can't return because of excessive deflection, many labs all have the galvanometer of destroying in a large number. In order to avoid the phenomenon, people add a galvanometer protection circuit, and the selection of a parallel resistor, connection, operation of the protection circuit and the like brings unnecessary troubles to detection; moreover, when the current is detected by using the lowest sensitivity gear, the binding post from the higher sensitivity gear to the highest sensitivity gear must be changed step by step to access the circuit so as to accurately detect the current, so that the operation is complicated, and the detection working efficiency is low.
Disclosure of Invention
In order to overcome above-mentioned prior art's weak point, the utility model provides a galvanometer with self preservation protects function has overcome traditional galvanometer and has adopted the shunting that many grades of fixed resistance, a plurality of terminal brought and can not continuous adjustment, and the galvanometer that leads to is burnt out, the pointer is bent or the pointer is because of the phenomenon of the unable return of excessive deflection.
The utility model discloses a realize through following technical scheme: the utility model provides a galvanometer with self preservation protects function, its characterized in that, includes the galvanometer body, is equipped with pointer gauge outfit, disc line-wound rheostat, galvanometer terminal and sensitivity mark line on the galvanometer body, two galvanometer terminals are connected respectively to the both ends of pointer gauge outfit, and the pointer gauge outfit passes through the galvanometer terminal and winds the rheostat with the disc line in parallel, the sensitivity mark line that the pivot knob line on the pivot knob of disc line-wound rheostat indicates galvanometer's sensitivity.
furthermore, the pointer gauge outfit is a high-sensitivity direct-current magnetoelectric instrument gauge outfit.
Furthermore, the galvanometer binding post has no polarity and is used for connecting to-be-detected current.
Further, the disc wire-wound rheostat is high-power disc wire-wound rheostat, disc wire-wound rheostat comprises disc wire-wound rheostat pivot, porcelain disk body, resistance line, porcelain drive shaft, brush and brush holder body, the resistance line is wound on porcelain ring of porcelain disk body, and resistance line one end is the 0 ohm wiring end of resistance line, and the other end is the whole resistance wiring end of resistance line, and 3 rings of resistance line that are close to 0 ohm wiring end are equipped with electrically conductive spraying layer, 3 rings of resistance line that are close to whole resistance wiring end are equipped with insulating spraying layer, and resistance line adjustable resistance sheetmetal wiring end passes through brush holder body connection brush, two terminals of galvanometer are connected respectively to 0 ohm wiring end and adjustable resistance sheetmetal wiring end.
Furthermore, the variable resistance range of the disc wire-wound rheostat is continuously adjustable within 0-R-infinity, and the R resistance value is 20 omega.
The utility model has the advantages that: the self-made disc wire-wound rheostat is low in cost and simple to manufacture. The self-made disc wire-wound rheostat has the advantages that the variable resistance can be continuously adjusted between 0, R and infinity, the shunt capacity is strong, the shunt adjustment is convenient, the galvanometer is protected to the maximum extent, and the phenomena that the galvanometer is burnt out, a pointer is bent or the pointer cannot return due to excessive deflection and the like caused by too large current to be detected are effectively prevented; the resistance of the rheostat can be continuously changed by rotating the rotary shaft knob, so that the sensitivity of the galvanometer is changed, the sensitivity can be visually displayed, and the detection precision is improved to the maximum extent; can greatly reduce the damage of the instrument, save the purchase cost of the instrument and have more obvious economic benefit.
Drawings
The invention will be further explained below with reference to the drawings and examples.
Fig. 1 is a schematic structural diagram of the present invention;
Fig. 2 is a schematic circuit diagram of the present invention;
Fig. 3 is a schematic structural diagram of the disc wire-wound varistor of the present invention.
In the figure: 1. galvanometer body, 2, pointer gauge outfit, 3, disc wire-wound rheostat, 4, terminal, 5, sensitivity marking line, 31, pivot, 32, porcelain disk body, 33, resistance line, 34, porcelain drive shaft, 35, brush, 36, brush holder body, 331, 0 ohm terminal, 332, conductive spray coating, 333, all resistance terminal, 334, insulating spray coating, 335, adjustable resistance sheetmetal terminal.
Detailed Description
The galvanometer with the self-protection function as shown in fig. 1 to fig. 3 is characterized by comprising a galvanometer body 1, wherein a pointer head 2, a disc wire-wound rheostat 3, a galvanometer binding post 4 and a sensitivity marking line 5 are arranged on the galvanometer body 1, two galvanometer binding posts 4 are respectively connected to two ends of the pointer head 2, the pointer head 2 is connected with the disc wire-wound rheostat 3 in parallel through the galvanometer binding posts 4, and the sensitivity marking line 5 pointed by a rotating shaft knob marking line 312 on a rotating shaft knob 311 of the disc wire-wound rheostat 3 represents the sensitivity of the galvanometer.
the pointer gauge outfit 2 is a high-sensitivity direct-current magnetoelectric instrument gauge outfit.
The galvanometer binding post 4 is not polarized and is used for connecting to-be-detected current.
The disc wire-wound rheostat 3 is a high-power disc wire-wound rheostat, the disc wire-wound rheostat 3 is composed of a disc wire-wound rheostat rotating shaft 31, a ceramic disc body 32, a resistance wire 33, a ceramic driving shaft 34, an electric brush 35 and a brush holder body 36, the rotating shaft 31 is connected with a rotating shaft knob 311, the resistance wire 33 is wound on a ceramic ring of the ceramic disc body 32, one end of the resistance wire is a resistance wire 0 ohm terminal 331, the other end of the resistance wire is a resistance wire all-resistance terminal 333, 3 circles of resistance wires close to the resistance wire 0 ohm terminal 331 are provided with a conductive spraying layer 332, 3 circles of resistance wires close to the resistance terminal 333 are provided with an insulating spraying layer 334, the resistance wire adjustable resistance sheet metal terminal 335 is connected with the electric brush 35 through the brush holder body 36, and the resistance wire 0 ohm terminal 331 and the adjustable resistance sheet metal.
The variable resistance range of the disc wire-wound rheostat 3 is continuously adjustable within 0-R-infinity, and the R resistance value is 20 omega.
In the specific operation, the pointer gauge outfit 2 is connected with a resistance wire 0 ohm terminal 331 and a disc wire-wound rheostat variable resistance sheet metal terminal (335) and then is respectively connected with two terminals 4; rotating the rotation shaft knob 311 to make the rotation shaft knob scribed line 312 at the leftmost position on the sensitivity display mark line 5; two binding posts 4 of the galvanometer are connected with the current to be detected, the rotating shaft knob 311 is rotated step by step according to the deflection size of the pointer, the rotating shaft knob 311 is rotated clockwise step by step along with the reduction of the detected current until the rotating shaft knob scribed line 312 is positioned at the rightmost end position on the sensitivity mark line 5, and then the detection circuit is adjusted until the pointer of the galvanometer points to the middle 0 scribed line of the galvanometer scale, which indicates that the current to be detected is 0 under the highest sensitivity of the galvanometer.
In summary, the utility model adopts the self-made disc wire-wound rheostat, so that the rheostat varistor resistance range is continuously adjustable within 0-R to infinity, and R is 20 ohms, thereby realizing the change of the shunting effect of the rheostat and achieving the practical effect of self-protection; the self-made disc wire-wound rheostat has the advantages of low cost, simple structure and easy learning and meeting; improve present widely used galvanometer with self-control disc wire-wound rheostat, connect simply, convenient operation, effect are outstanding, have both ensured galvanometer's safe in utilization, and galvanometer's sensitivity is easily adjusted moreover, can realize treating the measurement of measuring current under the highest sensitivity, is the galvanometer new product of ideal, has good practical value, produces considerable economic benefits simultaneously.
Claims (5)
1. The utility model provides a galvanometer with self preservation protects function, its characterized in that, includes galvanometer body (1), is equipped with pointer gauge outfit (2), disc line-wound rheostat (3), galvanometer terminal (4) and sensitivity marking line (5) on galvanometer body (1), two galvanometer terminal (4) are connected respectively at the both ends of pointer gauge outfit (2), and pointer gauge outfit (2) are connected in parallel with disc line-wound rheostat (3) through galvanometer terminal (4), the directional sensitivity marking line (5) of pivot knob groove (312) on pivot knob (311) of disc line-wound rheostat (3) have represented galvanometer's sensitivity.
2. A galvanometer with self-protecting function according to claim 1, characterized in that said pointer head (2) is a high sensitivity dc magnetoelectric meter head.
3. Galvanometer with self-protection according to claim 1, characterized in that the galvanometer terminal (4) is not polarized for connection to the current to be detected.
4. A galvanometer with self-protection function according to claim 1, characterized in that the disc wire-wound rheostat (3) is a high-power disc wire-wound rheostat, the disc wire-wound rheostat (3) is composed of a disc wire-wound rheostat rotating shaft (31), a porcelain disc body (32), a resistance wire (33), a porcelain driving shaft (34), a brush (35) and a brush holder body (36), a rotating shaft knob (311) is connected on the rotating shaft (31), the resistance wire (33) is wound on a porcelain ring of the porcelain disc body (32), one end of the resistance wire is a resistance wire 0 ohm terminal (331) and the other end is a resistance wire all-resistance terminal (333), 3 circles of resistance wire near the 0 ohm terminal (331) are provided with a conductive sprayed coating (332), 3 circles of resistance wire near the all resistance terminals (333) are provided with an insulating coating (334), and a resistance wire adjustable resistance metal sheet terminal (335) is connected with the brush (35) through the brush holder body (36), and the 0 ohm terminal (331) and the adjustable resistance sheet metal terminal (335) are respectively connected with a galvanometer terminal (4).
5. The galvanometer with the self-protection function according to claim 1, wherein the rheostat (3) has a continuously adjustable rheostat range of 0-R to infinity, and the R resistance is 0-20 Ω.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822023495.6U CN209746024U (en) | 2018-12-04 | 2018-12-04 | Galvanometer with self-protection function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822023495.6U CN209746024U (en) | 2018-12-04 | 2018-12-04 | Galvanometer with self-protection function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209746024U true CN209746024U (en) | 2019-12-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822023495.6U Expired - Fee Related CN209746024U (en) | 2018-12-04 | 2018-12-04 | Galvanometer with self-protection function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209746024U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109444512A (en) * | 2018-12-04 | 2019-03-08 | 徐州工程学院 | A kind of galvanometer with self-protection function |
-
2018
- 2018-12-04 CN CN201822023495.6U patent/CN209746024U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109444512A (en) * | 2018-12-04 | 2019-03-08 | 徐州工程学院 | A kind of galvanometer with self-protection function |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191206 Termination date: 20201204 |