CN108008156A - A kind of telescopic clamp ammeter - Google Patents

Abstract

The invention discloses a telescopic clamp-type ammeter, which relates to the technical field of current measurement; it includes a handle, a display, an openable clamp head, a through-core current transformer, and a measurement module arranged inside the handle. It includes a telescopic device and a telescopic button arranged on the handle. The pliers head includes a left pliers head and a right pliers head arranged at the front end of the telescopic device. The telescopic button is slidably matched with the handle and the telescopic device. The telescopic device Cooperating with the telescopic handle, the stretching movement of the telescopic device drives the left and right pliers to close together, and the retraction movement of the telescopic device drives the left and right pliers to open and separate; through current measurement, transmission control and other technologies, it realizes long-distance Measurement, the operation process is simple, time-saving and labor-saving, and will not damage the current-carrying wires by friction. Measurement and use are safer, and there is no potential safety hazard.

Description

A telescopic clamp-type ammeter

technical field

The invention relates to the technical field of current measurement, in particular to a telescopic clamp-type ammeter.

Background technique

During the operation or maintenance of the power system, many devices will be involved in measuring the magnitude of their operating current. Some equipment is installed in a three-dimensional cabinet with too narrow or compact space. There are many and disordered components in the cabinet, and the conductive or non-conductive parts are intricate.

Currently, the popular clamp-type ammeter is small in size, and the current transformer is connected with the handle. Accident. First, in a narrow or compact three-dimensional cabinet full of components, during the process of extending the arm, due to the large space occupied by the arm, the arm is likely to touch adjacent live equipment or wiring, which seriously threatens the operation The personal safety of the operator; the arm may also touch the adjacent non-charged components, which will cause the relevant components to malfunction. Second, when measuring components, when the arm is close to the device under test, the device under test or adjacent devices are likely to discharge to the person, especially when the safety distance is not enough or the hands and arms sweat too much in summer It is easier to appear below.

In the prior art, the patent application number is "201010502989.8" and the invention patent named "telescopic clamp-type ammeter". According to the record in its beneficial effect, although it has been realized that "the tester can operate the test instrument at a long distance, avoiding close contact with the current-carrying wire, which is safer", but "this telescopic rod must be composed of at least two insulating tubes, and must be relatively It can be fixed by tightening between two adjacent joints." It can be seen that the telescopic operation is time-consuming and laborious, and the telescopic tube needs to be pulled out or pressed back one by one. According to the description in paragraph [0018] of its manual, "Press the bottom end of the telescopic rod hard, and the jaws will open the current transformer under the action of the triangular guide" and "When the test is completed, pull the bottom end of the telescopic tube hard, the jaws It will open the current transformer", it can be seen that it is more laborious in the process of measurement and use, and it is bound to cause friction damage to the current-carrying wire, thus bringing safety hazards.

Contents of the invention

The technical problem to be solved by the present invention is to provide a telescopic clamp-type ammeter, which realizes long-distance measurement through technologies such as current measurement and transmission control. , It is safer to use and has no potential safety hazards.

In order to solve the above-mentioned technical problems, the technical solution adopted by the present invention is to include a handle, a display arranged on the handle, an openable pliers head and a through-hole current transformer, and a measurement module arranged inside the handle , the current transformer is unidirectionally connected to the measurement module, the measurement module is unidirectionally connected to the display, and it also includes a controllable telescopic device arranged on the handle, the controllable telescopic device includes a telescopic device and a telescopic button, and the pliers The head includes a left pliers head and a right pliers head arranged on the front end of the telescoping device. The telescoping button is slidably matched with the handle and the telescopic device at the same time, and the telescopic device is telescopically matched with the handle.

A further technical solution is: the telescoping device includes a first telescoping device and a second telescoping device, the left pincer head is arranged on the upper end of the first telescoping device, and the right pincer head is arranged on the upper end of the second telescoping device.

A further technical solution is: the first telescopic device is a first fence, the second telescopic device is a second fence, and the first fence and the second fence have the same structure.

A further technical solution is: it also includes a spring, the handle includes a second sliding groove, a third sliding groove and a rotating hole arranged inside the upper end thereof, the third sliding groove is located below the second sliding groove, the The turning hole is located on the right side of the second sliding groove;

The first fence includes railings and bearings, one end of two adjacent railings is rotatably connected by bearings, the first fence and the second fence are arranged in a staggered manner, and the middle parts of the two intersecting railings on the top are rotatably connected by bearings The lower end of the railing at the bottom of the first fence is fixedly connected with the active rod, and its joint is fixedly connected with the first rotating shaft, the bottom of the active rod is provided with the first sliding shaft, the railing at the bottom of the second fence The lower end is provided with a second sliding shaft;

The telescopic button includes a key board, and also includes a keyboard arranged at the right end of the key board, a first sliding groove on the right, a third sliding shaft on the left, and a cylinder at the left end;

One end of the spring is fixed on the inner wall of the handle, and the other end is plugged and fixed with the cylinder; the first sliding shaft is slidingly fitted with the first sliding groove, and the second sliding shaft is slidingly fitted with the second sliding groove , the third sliding shaft is in sliding fit with the third sliding groove, and the first rotating shaft is in rotational fit with the rotating hole.

A further technical solution is: a through cavity is provided inside the railing, and the wires connected to the current transformer are connected to the measurement module through the cavity.

A further technical solution is: the display is a liquid crystal display.

A further technical solution is: the keyboard is a disk-shaped keyboard.

A further technical solution is: the pliers head is a plastic pliers head, and the expansion device is a plastic expansion device.

A further technical solution is: it also includes a toggle switch arranged on the handle, and the toggle switch is connected with the measurement module.

The beneficial effects produced by adopting the above-mentioned technical scheme are:

First, because you only need to press the keyboard of the telescopic button lightly, the telescopic device can realize the stretching movement and drive the left clamp head and the right clamp head to close together. When the keyboard is released, the retractable device can realize the automatic retraction movement and drive the The left clamp head is separated from the right clamp head, so the tester is far away from the measured equipment and the current-carrying wire, which is very safe; the operation process is simple, time-saving and labor-saving, and will not rub and damage the current-carrying wire, making measurement and use safer. No security risks.

Second, there is a through cavity inside the railing, and the wire connected to the current transformer is connected to the measurement module through the cavity. The built-in connection of the wire makes the appearance of the product simple and beautiful, and it is not easy to tear the wire during use. The structure is firm and reliable. It is safer and more reliable to use.

Third, the fence-type telescopic device does not increase the volume burden of the product in the retracted state, and is very convenient to carry.

Fourth, the display is a liquid crystal display, the product is small in size and has a long service life.

Fifth, the disc-shaped keyboard is easy to press and feels comfortable.

Sixth, the plastic pliers head and plastic telescopic device will not cause electric shock to the operator, and the measurement is safe to use.

Seventh, the toggle switch can control the position of the measuring current and the power switch, making the measurement more practical and convenient.

Description of drawings

Fig. 1 is a structural diagram of the present invention;

Fig. 2 is a structural diagram of the telescopic button in the present invention.

Among them: 1 handle, 2 display, 4 telescopic device, 5 telescopic button, 6 toggle switch, 11 second sliding groove, 12 third sliding groove, 31 left clamp head, 32 right clamp head, 41 first rotating shaft, 42 First sliding shaft, 43 second sliding shafts, 51 keyboards, 52 key boards, 53 first sliding grooves, 54 third sliding shafts.

Detailed ways

The technical solutions in the embodiments of the present invention are clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

In the following description, a lot of specific details are set forth in order to fully understand the present invention, but the present invention can also be implemented in other ways different from those described here, and those skilled in the art can do it without departing from the meaning of the present invention. By analogy, the present invention is therefore not limited to the specific examples disclosed below.

As shown in Figures 1 and 2, the present invention discloses a telescopic clamp-type ammeter, which includes a handle 1, a display 2 arranged on the handle 1, a toggle switch 6, an openable plastic clamp head and a through-hole type current transformer, and the measuring module and spring arranged inside the handle 1; it also includes a controllable telescopic device arranged on the handle 1, the controllable telescopic device includes a plastic telescopic device 4 and a telescopic button 5, and the clamp The head includes a left pincer head 31 and a right pincer head 32 arranged on the front end of the telescopic device 4. The telescopic device 4 includes two first and second fences with the same structure. The left pincer head 31 is fixed on the upper end of the first fence, and the right pincer head The head 32 is fixed on the upper end of the second fence; the handle 1 includes a second sliding groove 11, a third sliding groove 12 and a rotating hole arranged inside the upper end thereof, and the third sliding groove 12 is located below the second sliding groove 11, The rotating hole is located on the right side of the second sliding groove 11;

The first fence includes a plurality of railings and bearings, and the ends of two adjacent railings are rotatably connected by bearings, the first fence and the second fence are arranged in a staggered manner, and the middle parts of the two intersecting railings on the top are rotatably connected by bearings; The lower end of the railing at the bottom of the first fence is fixedly connected with an active rod, and its joint is fixedly connected with a first rotating shaft 41. A first sliding shaft 42 is arranged at the bottom of the active rod. The lower end of the railing at the bottom of the second fence A second sliding shaft 43 is provided;

The telescoping button 5 includes a key board 52, a disc-shaped keyboard 51 arranged at the right end of the key board 52, a first sliding groove 53 on the right, a third sliding shaft 54 on the left and a cylinder at the left end;

One end of the spring is fixed on the inner wall of the handle 1, and the other end is plugged and fixed with the cylinder; the first sliding shaft 42 is slidably fitted with the first sliding groove 53, and the second sliding shaft 43 is fitted with the second sliding groove. 11 sliding fit, the third sliding shaft 54 is slidingly fitting with the third sliding groove 12, and the first rotating shaft 41 is rotatingly fitting with the rotating hole;

There is a through cavity inside the railing, and the wires connected to the current transformer are connected to the measurement module through the cavity;

The toggle switch 6 is connected to the measurement module to control the position of the measurement current and the power switch; the current transformer is connected to the measurement module in one direction, and the measurement module is connected to the display 2 in one direction; the telescopic button 5 slides with the handle 1 and the telescopic device 4 at the same time Cooperate, the telescoping device 4 is telescopically matched with the handle 1.

Press the disk-shaped keyboard 51 of the telescopic button 5, the third sliding shaft 54 slides to the left along the third sliding groove 12, and the spring is compressed; at the same time, the telescopic button 5 makes the first sliding shaft 42 slide in the first sliding position. Sliding in the slot 53, the first sliding shaft 42 drives the first fence and the active lever to rotate clockwise with the first rotating shaft 41 as the axis, so that each railing on the first fence and the second fence rotates with each bearing and moves toward the The front of the handle is stretched, and the left pincer head 31 and the right pincer head 32 are closed together after containing the current-carrying wire, and the current data is measured; meanwhile, the second sliding shaft 43 at the lower end of the second fence moves along the direction of the second sliding groove 11. Swipe right. After measuring, unclamp the disc-shaped keyboard 51 of telescoping button 5, the spring bounces back automatically, and the above-mentioned parts move in reverse automatically, and the left pincer 31 and the right pincer 32 are opened and separated.

The display 2 is a liquid crystal display, and the measurement module is a technical solution in the prior art.

Claims (9)

1. A telescopic clamp-type ammeter, including a handle (1), a display (2) arranged on the handle (1), an openable clamp head and a through-hole current transformer, and a (1) The internal measurement module, the current transformer is connected to the measurement module in one direction, and the measurement module is connected to the display (2) in one direction. It is characterized in that it also includes a controllable telescopic device arranged on the handle (1), The controllable telescopic device includes a telescopic device (4) and a telescopic button (5), and the pincer head includes a left pincer head (31) and a right pincer head (32) arranged at the front end of the telescopic device (4). The button (5) slides and cooperates with the handle (1) and the telescopic device (4) at the same time, and the telescopic device (4) telescopically cooperates with the handle (1). 2. A telescopic clamp-type ammeter according to claim 1, characterized in that: the telescopic device (4) includes a first telescopic device and a second telescopic device, and the left pincer head (31) is set at the second The upper end of the first telescopic device, the right pincer head (32) is arranged on the upper end of the second telescopic device. 3. A telescopic clamp-type ammeter according to claim 2, characterized in that: the first telescopic device is a first fence, the second telescopic device is a second fence, and the first fence and the first fence The two fences have the same structure. 4. A telescopic clamp-type ammeter according to claim 3, characterized in that it also includes a spring, and the handle (1) includes a second sliding groove (11) and a third sliding groove (11) arranged inside its upper end. slot (12) and a turning hole, the third sliding slot (12) is located below the second sliding slot (11), and the turning hole is located to the right of the second sliding slot (11); The first fence includes railings and bearings, one end of two adjacent railings is rotatably connected by bearings, the first fence and the second fence are arranged in a staggered manner, and the middle parts of the two intersecting railings on the top are rotatably connected by bearings The lower end of the railing at the lower part of the first fence is fixedly connected with an active rod, and the joint is fixedly connected with a first rotating shaft (41), and a first sliding shaft (42) is arranged at the lower part of the active rod. The lower end of the railing at the lower part of the second fence is provided with a second sliding shaft (43); The telescopic button (5) includes a key board (52), a keyboard (51) arranged at the right end of the key board (52), a first sliding groove (53) on the right, a third sliding shaft (54) on the left ) and the cylinder at the left end; One end of the spring is fixed on the inner wall of the handle (1), and the other end is plugged and fixed with the cylinder; the first sliding shaft (42) is slidingly fitted with the first sliding groove (53), and the second The sliding shaft (43) is slidingly fitted with the second sliding groove (11), the third sliding shaft (54) is slidingly fitted with the third sliding groove (12), and the first rotating shaft (41) is rotatingly fitted with the rotating hole . 5 . The telescopic clamp-type ammeter according to claim 4 , wherein a through cavity is provided inside the railing, and the wire connected to the current transformer is connected to the measurement module through the cavity. 6 . 6. A telescopic clamp-type ammeter according to claim 5, characterized in that: the display (2) is a liquid crystal display. 7. The telescopic clamp-type ammeter according to claim 6, characterized in that: the keyboard (51) is a disk-shaped keyboard. 8. A telescopic clamp-type ammeter according to claim 1, characterized in that: the clamp head is a plastic clamp head, and the telescopic device (4) is a plastic telescopic device. 9. A telescopic clamp-type ammeter according to any one of claims 1-8, characterized in that it also includes a toggle switch (6) arranged on the handle (1), the toggle switch The switch (6) is connected with the measurement module.