CN217060482U

CN217060482U - Automatic calibrating device of current transformer

Info

Publication number: CN217060482U
Application number: CN202220208173.2U
Authority: CN
Inventors: 俞逸尘; 孔叶军; 冯志强
Original assignee: Ningbo Institute Of Metrology And Testing Ningbo New Material Inspection And Testing Center
Current assignee: Ningbo Institute Of Metrology And Testing Ningbo New Material Inspection And Testing Center
Priority date: 2022-01-24
Filing date: 2022-01-24
Publication date: 2022-07-26
Anticipated expiration: 2032-01-24

Abstract

The utility model discloses an automatic calibrating device for a current transformer, which belongs to the technical field of current transformers and solves the problem of working efficiency, the key points of the technical proposal are that a human body judging module for detecting a human body is arranged at each positioning groove of the workbench, a pressure judging module for detecting the placement of a current transformer is arranged at the bottom of the positioning groove, the output end of the human body judging module is connected with a 'not' gate circuit, the output ends of the pressure judging module and the 'not' gate circuit are connected with a 'and' gate circuit, the output end of the 'and' gate circuit is connected with an executing circuit, the executing circuit controls the work of the lifting mechanism, when the current transformer is placed into the positioning groove and a person is not detected, the execution circuit controls the lifting mechanism to work, and the lifting mechanism drives the contact pin assembly to contact with the contact of the current transformer, so that the effect of improving the working efficiency is achieved.

Description

Automatic calibrating device of current transformer

Technical Field

The utility model relates to a current transformer field relates to an automatic calibrating installation of current transformer especially.

Background

For the existing current transformer as a sensor for current sampling or current induction, the induction accuracy is very important, and the application of the current transformer is directly influenced by the working reliability of the current transformer. In order to ensure the stable and reliable operation of the current transformer, a corresponding current transformer calibrating device needs to be designed. The existing calibrating device has the following defects to be further solved:

1. the use reliability of the calibrating device is easily reduced by the influence of the test voltage and current, so that the service life of the calibrating device is shortened;

2. the working mode is not convenient enough, the manual operation steps are more, and the operation of a user is laboursome.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to prior art's weak point, solve the technical problem in the correlation technique to a certain extent at least, provide an automatic calibrating installation of current transformer, have long service life, the advantage of convenient to operate and use.

In order to solve the technical problem, the technical scheme of the utility model is that: an automatic calibrating device for a current transformer comprises a workbench, wherein a plurality of positioning grooves for placing, embedding and positioning the current transformer are arranged on the workbench, a bracket is arranged at each positioning groove on the workbench, a lifting mechanism is arranged on each bracket, a fixed block is fixedly connected onto a lifting arm of the lifting mechanism, a vertical transition plate is fixed on the side edge of the fixed block, a positioning plate is fixed on the side surface of the transition plate, a contact pin component for detecting the current transformer is fixed on the positioning plate, the contact pin component is positioned above the positioning grooves and is driven by the lifting mechanism to contact with a contact of the current transformer for power-on detection,

every constant head tank position of workstation is provided with the human judgement module that is used for surveying the human body, and the bottom of constant head tank is provided with the pressure judgement module that is used for surveying current transformer and places, the output of human judgement module is connected with "not" gate circuit, and the output of pressure judgement module and "not" gate circuit is connected to "and" gate circuit, "is connected with the execution circuit with the output of" gate circuit, execution circuit control elevating system's work, wherein, when current transformer put into the constant head tank and not detected the man-hour, execution circuit control elevating system work, elevating system drive contact pilotage subassembly contact current transformer's contact.

Preferably, the transition plate is provided with a transverse first long waist groove, and the transition plate is fixed with the fixing block under the limit of the first long waist groove through a plurality of bolts;

the transition plate is provided with a vertical second long waist groove, and the transition plate is fixed with the positioning plate under the limit of the second long waist groove through a plurality of bolts.

Preferably, the cross section of the positioning plate is L-shaped.

Preferably, a plurality of positioning holes with equal intervals are arranged on the positioning plate.

Preferably, the contact pin assembly comprises a pin body, a pin cap and a spring, the pin body penetrates through the positioning hole and fixes the pin cap on the top of the pin body, the lower end of the pin body is provided with a frustum, the lower end of the spring is supported on the frustum, the upper end of the spring is supported below the positioning plate, and the pin cap abuts against the upper surface of the positioning plate.

Preferably, a guide sleeve is sleeved in the positioning hole and sleeved on the needle body.

Preferably, the human body judging module comprises a human body sensor and a first comparing module, and the human body sensor is connected to the first comparing module and outputs a high level signal when detecting a human body; the pressure judging module comprises a pressure sensor and a second comparing module, and the pressure sensor is connected with the second comparing module and outputs a high-level signal when the detection current transformer is put in.

Compared with the prior art, the utility model discloses technical effect mainly embodies in following aspect:

when the current transformer is calibrated, a worker firstly puts the current transformer into the positioning groove, the human body judging module judges that a person exists and outputs a high-level signal, the pressure judging module judges that the current transformer is put in, the high-level signal is output, the execution circuit does not work, and the lifting mechanism does not work; after the staff placed the current transformer, the people left and incorporated into next station, the human body judgement module that is in this moment on first station just judges that there is not the people, output low level signal, execution circuit just begins work after that and makes the elevating system move, contact pilotage subassembly just pushes down the completion and to current transformer's conflict this moment, this working method, staff's operating procedure has been reduced, automatically, accomplish the whereabouts of contact pilotage subassembly, thereby improve work efficiency, because foretell operating method is more high-efficient, and safer, calibrating installation is owing to also done the design on contact pilotage subassembly, service life extension in the time of making work.

Drawings

FIG. 1 is a schematic view of a table in the embodiment;

FIG. 2 is a schematic side view of an exemplary stylus assembly;

FIG. 3 is a schematic diagram of a second side view of an exemplary stylus assembly;

FIG. 4 is a schematic top view of an embodiment of a stylus assembly;

FIG. 5 is a schematic circuit diagram;

fig. 6 is a schematic diagram of an execution circuit.

Reference numerals are as follows: 1. a work table; 11. positioning a groove; 12. a support; 2. a lifting mechanism; 21. a lifting arm; 3. a fixed block; 4. a transition plate; 41. a first long waist slot; 42. a second long waist slot; 43. a bolt; 5. positioning a plate; 51. positioning holes; 52. a guide sleeve; 6. a stylus assembly; 61. a needle body; 62. a needle cap; 63. a spring; 64. a frustum; 7. a human body judgment module; 71. a human body sensor; 72. a first comparison module; 8. a pressure judgment module; 81. a pressure sensor; 82. a second comparing module; 9. a NOT gate circuit; 10. an AND gate circuit; 100. an execution circuit.

Detailed Description

The following detailed description of the embodiments of the present invention is made with reference to the accompanying drawings, so that the technical solution of the present invention can be more easily understood and grasped.

The embodiment is as follows:

the utility model provides an automatic calibrating installation of current transformer, includes workstation 1, is provided with a plurality of constant head tanks 11 that insert the location that supply current transformer to place on the workstation 1. Each positioning groove 11 is a station and is arranged in turn. In fig. 1, four stations are illustrated for exemplary understanding.

As shown in fig. 1 and fig. 2, a bracket 12 is provided at each positioning groove 11 on the working platform 1, and the bracket 12 is not limited to be used for installing and fixing the lifting mechanism 2. When the lifting mechanism 2 is implemented, mechanisms such as an air cylinder and a hydraulic cylinder can be adopted, and the lifting function can be completed. The lifting mechanism 2 is lifted and lowered by controlling the driving power supply to supply power to the lifting mechanism 2. In this embodiment, the lifting arm 21 may be some equivalent components such as a lifting shaft.

Each support 12 is provided with a lifting mechanism 2, a fixing block 3 is fixedly connected to a lifting arm 21 of each lifting mechanism 2, a vertical transition plate 4 is fixed to the side edge of each fixing block 3, a positioning plate 5 is fixed to the side face of each transition plate 4, a contact pin assembly 6 used for detecting a current transformer is fixed to each positioning plate 5, and each contact pin assembly 6 is located above the corresponding positioning groove 11 and is driven by the lifting mechanism 2 to be in contact with a contact of the current transformer for power-on detection. A wire clamp is typically attached to the stylus assembly 6 to complete the electrical circuit. During the verification process, the contact pin assembly 6 is moved downwards by the lifting mechanism 2 and contacts the contacts on the current transformer to realize electric conduction.

The scheme is mainly implemented by intelligently controlling the falling action of the contact pin assembly 6 and reducing the operation steps of workers.

Specifically, referring to fig. 1, a human body judgment module 7 for detecting a human body is arranged at each positioning groove 11 of the workbench 1, and a pressure judgment module 8 for detecting the placement of a current transformer is arranged at the bottom of the positioning groove 11.

Then, as will be understood by referring to fig. 5 and 6, the output terminal of the human body judging module 7 is connected to the not gate 9, the output terminals of the pressure judging module 8 and the not gate 9 are connected to the and gate 10, the output terminal of the and gate 10 is connected to the execution circuit 100, and the execution circuit 100 controls the operation of the lifting mechanism 2, wherein when the current transformer is placed in the positioning groove 11 and no human is detected, the execution circuit 100 controls the operation of the lifting mechanism 2, and the lifting mechanism 2 drives the contact pin assembly 6 to contact the contact of the current transformer.

Specifically, as can be seen in fig. 5, the human body judging module 7 includes a human body sensor 71 and a first comparing module 72, and the human body sensor 71 is connected to the first comparing module 72 and outputs a high level signal when detecting a human body. The pressure judging module 8 comprises a pressure sensor 81 and a second comparing module 82, wherein the pressure sensor 81 is connected with the second comparing module 82 and outputs a high-level signal when detecting that the current transformer is put in. The first comparison module 72 includes resistors R1, R2, a potentiometer Rp1, and a comparator LM 1. The human body sensor 71 is connected with the non-inverting input end of the comparator LM1 through the resistor R1, the voltage Vcc is grounded after being connected with the potentiometer Rp1 in series through the resistor R2, and the adjusting end of the potentiometer Rp1 is connected with the inverting input end of the comparator LM 1. The human body sensor 71 may be a pyroelectric infrared sensor. Otherwise the circuit structure and principle are the same for the second comparison block 82 and the first comparison block 72. Similarly, the second comparing module 82 outputs a high level when the pressure is detected, and outputs a low level otherwise.

Referring to fig. 6, the execution circuit 100 includes resistors R9 and R10, a transistor Q2, a diode D2, and a relay KA, when a signal output by the and gate 10 is a high-level signal S1 and passes through a resistor R9 in fig. 6, the transistor Q2 is turned on at this time, and the relay KA is powered on, so that the normally open switch is closed, the power supply of the lifting mechanism 2 is switched on, and the operation is started.

When the current transformer is calibrated, an operator firstly puts the current transformer into the positioning groove 11, the human body judging module 7 judges that a person exists at the moment and outputs a high-level signal, and the pressure judging module 8 outputs a high-level signal after judging that the current transformer is put in, at the moment, the execution circuit 100 does not work, and the lifting mechanism 2 does not act; after the staff placed the current transformer, the people left and incorporated into next station, and human judgement module 7 that is in this moment on first station just judges that there is not the people, outputs low level signal, and execution circuit 100 just begins work after that makes elevating system 2 move, and contact pilotage subassembly 6 just pushes down completion conflict to current transformer this moment, and this working method has reduced staff's operating procedure, accomplishes contact pilotage subassembly 6's whereabouts automatically to improve work efficiency.

In order to further optimize the structure, a transverse first long waist groove 41 can be arranged on the transition plate 4, and the transition plate 4 is fixed with the fixed block 3 under the limit of the first long waist groove 41 through a plurality of bolts 43. The transition plate 4 is provided with a vertical second long waist groove 42, and the transition plate 4 is fixed with the positioning plate 5 under the limit of the second long waist groove 42 through a plurality of bolts 43. Thus, the position of the positioning plate 5 can be finely adjusted by the above structure.

The cross section of the positioning plate 5 is L-shaped. This makes it possible to make the positioning hole 51 in the positioning plate 5 in a horizontal state. Facilitating assembly of the stylus assembly 6 and enabling up and down movement of the stylus assembly 6.

The positioning plate 5 is provided with a plurality of positioning holes 51 at equal intervals. In this way, the contacts on the current transformer at different positions can be verified according to the situation.

Specifically, referring to fig. 2, 3 and 4, the stylus assembly 6 includes a needle body 61, a needle cap 62, and a spring 63. The needle body 61 penetrates through the positioning hole 51 and fixes the needle cap 62 on the top of the needle body 61, the lower end of the needle body 61 is provided with a frustum 64, the lower end of the spring 63 is supported on the frustum 64, the upper end of the spring 63 is supported below the positioning plate 5, and the needle cap 62 abuts against the upper surface of the positioning plate 5. The needle cap 62 and the needle body 61 may be fixed by a screw-fit connection. During assembly, the needle body 61 can extend into the positioning hole 51 from bottom to top, and the needle cap 62 can be screwed after the top of the needle body passes through the positioning hole 51, so that the needle body 61 cannot fall off. Also before this, the spring 63 has of course been sleeved.

Furthermore, a guide sleeve 52 is sleeved in the positioning hole 51, and the guide sleeve 52 is sleeved on the needle body 61. The guide sleeve 52 can be fixed on the positioning hole 51, so that the guide function is realized, and the shaking of the needle body 61 is reduced. The guide sleeve 52 is a hollow cylinder structure.

Of course, the above is only a typical example of the present invention, and besides, the present invention can also have other various specific embodiments, and all technical solutions adopting equivalent replacement or equivalent transformation are all within the scope of the present invention as claimed.

Claims

1. The utility model provides an automatic calibrating installation of current transformer, includes workstation (1), is provided with constant head tank (11) that a plurality of current transformer that supply placed the embedding location on workstation (1), characterized by: a bracket (12) is arranged at each positioning groove (11) on the workbench (1), a lifting mechanism (2) is arranged on each bracket (12), a fixed block (3) is fixedly connected to a lifting arm (21) of the lifting mechanism (2), a vertical transition plate (4) is fixed at the side edge of the fixed block (3), a positioning plate (5) is fixed at the side surface of the transition plate (4), a contact pin component (6) for detecting a current transformer is fixed on the positioning plate (5), the contact pin component (6) is positioned above the positioning groove (11) and is driven by the lifting mechanism (2) to contact a contact of the current transformer for power-on detection,

a human body judgment module (7) for detecting a human body is arranged at each positioning groove (11) of the workbench (1), a pressure judgment module (8) for detecting the placement of a current transformer is arranged at the bottom of each positioning groove (11), the output end of the human body judging module (7) is connected with a 'not' gate circuit (9), the output ends of the pressure judging module (8) and the 'not' gate circuit (9) are connected with an 'and' gate circuit (10), the output end of the 'and' gate circuit (10) is connected with an executing circuit (100), the executing circuit (100) controls the work of the lifting mechanism (2), when the current transformer is placed in the positioning groove (11) and no person is detected, the execution circuit (100) controls the lifting mechanism (2) to work, and the lifting mechanism (2) drives the contact pin assembly (6) to contact with the contact of the current transformer.

2. The automatic calibrating device for the current transformer according to claim 1, wherein: the transition plate (4) is provided with a transverse first long waist groove (41), and the transition plate (4) is fixed with the fixing block (3) under the limiting of the first long waist groove (41) through a plurality of bolts (43);

the transition plate (4) is provided with a vertical second long waist groove (42), and the transition plate (4) is fixed with the positioning plate (5) under the limit of the second long waist groove (42) through a plurality of bolts (43).

3. The automatic calibrating device for the current transformer as claimed in claim 2, wherein: the cross section of the positioning plate (5) is L-shaped.

4. The automatic calibrating device for the current transformer according to claim 3, wherein: the positioning plate (5) is provided with a plurality of positioning holes (51) at equal intervals.

5. The automatic calibrating device for the current transformer according to claim 4, wherein: the contact pin assembly (6) comprises a pin body (61), a pin cap (62) and a spring (63), the pin body (61) penetrates through the positioning hole (51) and fixes the pin cap (62) at the top of the pin body (61), the lower end of the pin body (61) is provided with a frustum (64), the lower end of the spring (63) is supported on the frustum (64), the upper end of the spring (63) is supported below the positioning plate (5), and the pin cap (62) abuts against the upper surface of the positioning plate (5).

6. The automatic calibrating device for the current transformer according to claim 5, wherein: the positioning hole (51) is internally sleeved with a guide sleeve (52), and the guide sleeve (52) is sleeved on the needle body (61).

7. The automatic calibrating device for the current transformer according to claim 1, wherein: the human body judging module (7) comprises a human body sensor (71) and a first comparing module (72), wherein the human body sensor (71) is connected to the first comparing module (72) and outputs a high-level signal when detecting a human body; the pressure judging module (8) comprises a pressure sensor (81) and a second comparing module (82), wherein the pressure sensor (81) is connected with the second comparing module (82) and outputs a high-level signal when the detection current transformer is placed in.