CN213122177U

CN213122177U - Calibrating device for withstand voltage instrument

Info

Publication number: CN213122177U
Application number: CN202021972605.4U
Authority: CN
Inventors: 高翔
Original assignee: Shanghai Mulai Testing Technology Co ltd
Current assignee: Shanghai Mulai Testing Technology Co ltd
Priority date: 2020-09-10
Filing date: 2020-09-10
Publication date: 2021-05-04
Anticipated expiration: 2030-09-10

Abstract

The utility model discloses a calibrating device for withstand voltage appearance, which comprises a top plate, the middle part of roof is provided with transfers survey mechanism, transfer survey mechanism includes electro-magnet, standard resistance one, standard resistance two, interface one and interface two, and standard resistance one and standard resistance two constitute by two little standard resistance, and the middle part sliding connection of two little standard resistance has the conducting block, one side fixed mounting that the conducting block is close to the device center has the spring, and the middle part fixed mounting of roof has the fixed plate, two bottom surfaces of fixed plate all link to each other with the spring is fixed, and the equal fixed mounting in outside of the both ends side of fixed plate has the circuit board. The utility model discloses simple structure, convenient operation, whole process can detect the data relation under withstand voltage appearance actual measurement data and the specific resistance state fast portably during the operation, and then realizes the quantitative analysis to withstand voltage appearance actual error to realize quick calibration.

Description

Calibrating device for withstand voltage instrument

Technical Field

The utility model relates to a withstand voltage appearance maintains technical field, especially relates to a calibrating device for withstand voltage appearance.

Background

A withstand voltage tester, also called an electrical insulation strength tester, is used for testing the withstand voltage capability of an insulating material of an electrical appliance by applying a prescribed ac or dc high voltage between an electrified portion and a non-electrified portion (generally, a case) of the electrical appliance. During long-term operation, the electrical appliance is subjected to not only the action of the rated operating voltage, but also the action of an overvoltage which is higher than the rated operating voltage and causes a short time during operation (the overvoltage value may be several times higher than the rated operating voltage value). Under the action of these voltages, the internal structure of the electrically insulating material will change. When the overvoltage strength reaches a certain value, the insulation of the material is broken down, the electric appliance cannot normally operate, and an operator can get an electric shock to endanger the personal safety.

Through search, the invention with Chinese patent publication No. CN110907879A discloses a calibration method of an interturn voltage tester, which comprises the following steps: the method comprises the steps of firstly, acquiring external form condition information of a turn-to-turn voltage tester, wherein the external form condition information of the turn-to-turn voltage tester comprises placing inclination angle data of the turn-to-turn voltage tester, panel pointer position data of the turn-to-turn voltage tester and electromagnetic interference data of the turn-to-turn voltage tester, and carrying out external observation and monitoring operation on the external form condition information to obtain a real-time interception calibration signal or a passing calibration signal.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the defects existing in the prior art and providing a calibrating device for a pressure-resistant instrument.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a calibrating device for withstand voltage appearance, includes the roof, the middle part of roof is provided with transfers survey mechanism, transfer survey mechanism includes electro-magnet, standard resistance one, standard resistance two, interface one and interface two, and standard resistance one and standard resistance two comprise two little standard resistance, and two little standard resistance's middle part sliding connection has the conducting block, one side fixed mounting that the conducting block is close to the device center has the spring, and the middle part fixed mounting of roof has the fixed plate, two bottom surfaces of fixed plate all link to each other with the spring is fixed, and the equal fixed mounting in outside of the both ends side of fixed plate has the circuit board, the circuit board is provided with the interface that corresponds with standard resistance one and standard resistance two, and is provided with the ampere meter between electro-magnet and standard resistance one and the standard resistance two.

Preferably, the second interface and the first interface are respectively and fixedly installed at positions, corresponding to the first standard resistor and the second standard resistor, of the circuit board, the first interface and the second interface are independent of each other, and the electromagnet is fixedly installed at the position, located at two ends of the first standard resistor and the second standard resistor, of the top plate.

Preferably, a screw rod is arranged in the middle of the electromagnet, and the screw rod is fixedly connected with the suction plate of the electromagnet.

Preferably, the heat dissipation hole is formed in the middle of the top plate, the heat dissipation box is fixedly mounted at the bottom of the heat dissipation hole, and the fan is fixedly mounted in the middle of the inside of the heat dissipation box.

Preferably, the wiring terminal is fixedly installed around the four corners of the top plate, an installation groove is formed in the top of the wiring terminal, and a threaded hole is formed in the installation groove.

Preferably, a resistance mounting plate is fixedly mounted inside the threaded hole, and a resistance wire is fixedly mounted on one side, close to the center of the device, of the resistance mounting plate.

Preferably, the four corners of the bottom of the top plate are fixedly provided with folding legs, and the top positions of the folding legs are telescopic rods.

Compared with the prior art, the utility model provides a calibrating device for withstand voltage appearance possesses following beneficial effect:

1. through the electromagnet that sets up, during the use, switch on the interface that standard resistance one corresponds earlier, use withstand voltage appearance to test, the power of the electro-magnet is directly proportional with the electric current that the ampere meter experienced, if the electric current is too big this moment, the magnetic force of electro-magnet just corresponding grow, make the conducting block attract by the electro-magnet, thereby standard resistance one or standard resistance two form the short circuit because of breaking away from of conducting block, through the speed that the conducting block was attracted this moment, choose to increase or reduce resistance, survey the critical value, calibrate withstand voltage appearance data according to data, whole process can detect withstand voltage appearance actual measurement data and the data relation under the specific resistance state fast portably, and then realize the quantitative analysis to withstand voltage appearance actual error, thereby realize quick calibration.

2. Through the mutually independent interface I and the interface II that set up can carry out arbitrary series-parallel connection operation when using, both can not influence each other when using, also can change resistance through establishing ties and parallelly connected and carry out the rapid debugging, increased the practicality of device.

3. Fixed mounting has the fan through the inside middle of the heat dissipation case that sets up, and the fan operation produces the air flow during the use, because device inner structure is pure resistance circuit, and it is obvious to generate heat, and the air flow that the fan produced is in time got rid of the heat by the louvre, prevents the device trouble.

The device does not relate to the part and all is the same with prior art or can adopt prior art to realize, the utility model discloses simple structure, convenient operation, whole process can detect the data relation under withstand voltage appearance actual measurement data and the specific resistance state fast portably during the operation, and then realizes the quantitative analysis to withstand voltage appearance actual error to realize quick calibration.

Drawings

Fig. 1 is a schematic perspective view of a calibration device for a pressure resistance instrument according to the present invention;

fig. 2 is a schematic top view of a calibration device for a pressure resistance instrument according to the present invention;

fig. 3 is the utility model provides a calibrating device for withstand voltage appearance's end view structure schematic diagram.

In the figure: 1-top plate, 2-threaded hole, 3-electromagnet, 4-resistance wire, 5-circuit board, 6-standard resistor I, 7-resistor mounting plate, 8-wiring post, 9-heat dissipation hole, 10-heat dissipation box, 11-interface I, 12-standard resistor II, 13-fixing plate, 14-conductive block, 15-screw, 16-interface II, 17-fan and 18-folding leg.

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.

In the description of this patent, it is noted that unless otherwise specifically stated or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly and can include, for example, fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed. The specific meaning of the above terms in this patent may be understood by those of ordinary skill in the art as appropriate.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Example 1

Referring to fig. 1-3, a calibrating device for a withstand voltage instrument comprises a top plate 1, wherein a regulating and measuring mechanism is arranged in the middle of the top plate 1, the regulating and measuring mechanism comprises an electromagnet 3, a first standard resistor 6, a second standard resistor 12, a first interface 11 and a second interface 16, the first standard resistor 6 and the second standard resistor 12 are respectively composed of two small standard resistors, the middle parts of the two small standard resistors are connected with a conductive block 14 in a sliding manner, one side of the conductive block 14, which is close to the center of the device, is fixedly provided with a spring, the middle part of the top plate is fixedly provided with a fixing plate 13, two bottom surfaces of the fixing plate 13 are fixedly connected with the spring, circuit boards 5 are fixedly arranged outside the side surfaces of two ends of the fixing plate 13, the circuit boards 5 are provided with interfaces corresponding to the first standard resistor 6 and the second standard resistor 12, and an ammeter is arranged between the electromagnet 3, the interface corresponding to the first standard resistor 6 is firstly switched on, a voltage withstand instrument is used for testing, the power supply power of the electromagnet 3 is in direct proportion to the current sensed by the ammeter, at the moment, if the current is overlarge, the magnetic force of the electromagnet 3 is correspondingly increased, so that the conductive block 14 is attracted by the electromagnet 3, a short circuit is formed by the first standard resistor 6 or the second standard resistor 12 due to the separation of the conductive block 14, at the moment, the resistance is selectively increased or decreased through the attracted speed of the conductive block 14, a critical value is measured, and the data of the voltage withstand instrument are calibrated according to data.

The utility model discloses in, interface two 16 and interface one 11 respectively fixed mounting correspond standard resistance one 6 and standard resistance two 12's position at circuit board 5, and interface one 11 and interface two 16 mutual independence, 3 fixed mounting of electro-magnet is in the position at roof 1 position at standard resistance one 6 and standard resistance two 12 both ends, the parallel operation of arbitrary cluster can be carried out to mutually independent interface one 11 and interface two 16 when using, both can not influence each other when using, also can carry out the rapid debugging through series connection and parallelly connected change resistance, the practicality of device has been increased.

The utility model discloses in, the middle part of electro-magnet 3 is provided with screw rod 15, and screw rod 15 links to each other with the suction disc of electro-magnet 3 is fixed, and screw rod 15 can make things convenient for the fine setting of device electro-magnet 3 for the test result of device is more accurate.

The utility model discloses in, it has louvre 9 to open in the middle of the top of roof 1, and the bottom fixed mounting of louvre 9 has heat dissipation case 10, and fixed mounting has fan 17 in the middle of the inside of heat dissipation case 10, and fan 17 operation produces the air flow during use, because the device inner structure is pure resistance circuit, generates heat obviously, and the air flow that fan 17 produced is in time got rid of the heat by louvre 9, prevents the device trouble.

The utility model discloses in, fixed mounting has terminal 8 around the top four corners department of roof 1, and open at terminal 8's top has the mounting groove, and threaded hole 2 is opened to the inside of mounting groove.

The utility model discloses in, the inside fixed mounting of screw hole 2 has resistance mounting panel 7, and one side fixed mounting that resistance mounting panel 7 is close to the device center has resistance wire 4, and the resistance wire 4 through the screw thread installation on the terminal 8 is easily changed, and resistance wire 4 can simply carry out the series-parallel operation with standard resistance to realize quick adjustment's effect.

The working principle is as follows: when the device is used, the interface corresponding to the standard resistor I6 is firstly switched on, the voltage withstand instrument is used for testing, the power supply power of the electromagnet 3 is in direct proportion to the current sensed by an ammeter, at the moment, if the current is overlarge, the magnetic force of the electromagnet 3 is correspondingly increased, so that the conductive block 14 is attracted by the electromagnet 3, the standard resistor I6 or the standard resistor II 12 forms a short circuit due to the separation of the conductive block 14, at the moment, the resistance is selectively increased or decreased through the attraction speed of the conductive block 14, a critical value is measured, the data of the voltage withstand instrument is calibrated according to the data, the set independent interface I11 and interface II 16 realize mutual isolation or random series-parallel operation when in use, the set screw 15 is convenient for fine adjustment of the electromagnet 3 of the device, the fan 17 is fixedly installed in the middle of the set heat dissipation box 10, the fan 17 generates air flow when in use, and the internal structure of the device is, generate heat obviously, the air flow that fan 17 produced is in time got rid of the heat by louvre 9, prevents the device trouble, and the resistance wire 4 through the screw thread installation is easily changed on the terminal 8 of setting, and resistance wire 4 carries out the series-parallel connection operation with standard resistance to realize quick adjustment.

Example 2

Referring to fig. 1 to 3, a calibrating device for a pressure resistance instrument, in this embodiment, compared with embodiment 1, further includes folding legs 18 fixedly installed at four corners of the bottom of the top plate 1, and the top positions of the folding legs 18 are telescopic rods.

The working principle is as follows: during the use, stretch folding leg 18, support fixedly to the device, will fold folding leg 18 after the use and fold back, make things convenient for the device to deposit, the convenient regulation of design of telescopic link.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. A calibrating device for a withstand voltage instrument comprises a top plate (1), wherein a regulating and measuring mechanism is arranged in the middle of the top plate (1), and is characterized in that the regulating and measuring mechanism comprises an electromagnet (3), a first standard resistor (6), a second standard resistor (12), a first interface (11) and a second interface (16), the first standard resistor (6) and the second standard resistor (12) are respectively composed of two small standard resistors, the middle parts of the two small standard resistors are connected with a conductive block (14) in a sliding manner, one side, close to the center of the device, of the conductive block (14) is fixedly provided with a spring, the middle part of the top plate is fixedly provided with a fixing plate (13), two bottom surfaces of the fixing plate (13) are fixedly connected with the spring, the outer parts of the side surfaces of the two ends of the fixing plate (13) are respectively and fixedly provided with a circuit board (5), the circuit board (5) is provided with interfaces corresponding to the first standard, and an ammeter is arranged between the electromagnet (3) and the first standard resistor (6) and the second standard resistor (12).

2. The calibrating device for the voltage withstand tester according to claim 1, wherein the second interface (16) and the first interface (11) are respectively and fixedly installed on the circuit board (5) at positions corresponding to the first standard resistor (6) and the second standard resistor (12), the first interface (11) and the second interface (16) are independent of each other, and the electromagnet (3) is fixedly installed on the top plate (1) at positions at two ends of the first standard resistor (6) and the second standard resistor (12).

3. The calibrating device for the pressure-resistant instrument is characterized in that a screw rod (15) is arranged in the middle of the electromagnet (3), and the screw rod (15) is fixedly connected with a suction plate of the electromagnet (3).

4. The calibrating device for pressure-resistant instrument according to claim 1, wherein the top of the top plate (1) is provided with a heat dissipating hole (9) in the middle, the bottom of the heat dissipating hole (9) is fixedly provided with a heat dissipating box (10), and the inside of the heat dissipating box (10) is fixedly provided with a fan (17) in the middle.

5. The calibrating device for the pressure-resistant instrument is characterized in that the periphery of four corners of the top plate (1) is fixedly provided with a binding post (8), the top of the binding post (8) is provided with an installation groove, and the inside of the installation groove is provided with a threaded hole (2).

6. The calibrating device for the pressure resistance instrument is characterized in that a resistance mounting plate (7) is fixedly mounted inside the threaded hole (2), and a resistance wire (4) is fixedly mounted on one side, close to the center of the device, of the resistance mounting plate (7).

7. The calibrating device for the pressure-resistant instrument is characterized in that the four corners at the bottom of the top plate (1) are fixedly provided with folding legs (18), and the top positions of the folding legs (18) are telescopic rods.