CN219085034U - A new type of frequency conversion power line phase sequence checking device - Google Patents

Abstract

The utility model discloses a novel frequency conversion power circuit phase sequence checking device, which comprises a casing and a checking unit; The upper end of the rear side is provided with a storage slot, and the lower edge of the storage slot is hinged with a protective cover through a hinge; the checking unit: includes a U-shaped seat, a hollow cylinder, a threaded pipe, a conductive contact and a frequency conversion signal generator, and the U-shaped The seat is symmetrically arranged on the inner upper end of the storage tank, and the hollow cylinder is connected to the inside of the two U-shaped seats through the rotation of the pin shaft; the new frequency conversion power line phase sequence check device can quickly complete the phase sequence check of the frequency conversion power line The working and operation are simple and practical, and the conductive contacts can be stored and protected when not in use, so as to prevent the conductive contacts from being corroded by the external environment and affecting subsequent use.

Description

A new type of frequency conversion power line phase sequence checking device

technical field

The utility model relates to the technical field of electric power engineering, in particular to a novel frequency conversion power line phase sequence checking device.

Background technique

The frequency conversion circuit is a circuit that converts the frequency of alternating current, and generally controls the output voltage at the same time. It is mainly used in occasions such as frequency conversion speed control devices, induction heating devices, uninterruptible power supplies, etc., sub-circuits, and indirect frequency conversion circuits.

With the continuous development of the distribution network, the connection rate of ten thousand volt lines gradually plays an important role in improving the reliability of power supply. In the new construction and renovation projects in the process of improving the connection rate of distribution network, it often occurs to check the phase sequence of the line If the wrong situation is not corrected in time, it will easily affect the overall power supply work.

At present, the phase sequence check of the new frequency conversion power line is mainly carried out manually. Only by charging the line during the trial operation, can the phase sequence be checked at the contact point of the line. The wrong wiring cannot be found in advance, and multiple lines need to be checked. Repeated power outages affect the experience of power users. Even if there are a small number of phase sequence checking devices that can automatically complete the phase sequence checking of frequency conversion power lines, most of them cannot be used for accessing lines on the devices after they are used. The conductive contacts are stored and protected. If the conductive contacts are corroded by the external environment, it will easily affect the subsequent use. Therefore, we propose a new type of frequency conversion power line phase sequence checking device.

Utility model content

The technical problem to be solved by the utility model is to overcome the existing defects and provide a new type of frequency conversion power line phase sequence check device, which can quickly complete the phase sequence check work of the frequency conversion power line, the operation is simple and practical, and can be used without using When storing and protecting the conductive contacts, the subsequent use of the conductive contacts is prevented from being corroded by the external environment, which can effectively solve the problems in the background technology.

In order to achieve the above purpose, the utility model provides the following technical solutions: a new type of frequency conversion power line phase sequence checking device, including a casing and a checking unit;

Housing: there is a display screen at the upper end of the front side, uniformly distributed indicator lights are provided at the middle of the front side of the housing, a storage slot is provided at the upper end of the rear side of the housing, and a protective cover is hinged at the lower edge of the storage slot through a hinge;

Checking unit: including U-shaped seat, hollow cylinder, threaded pipe, conductive contact and frequency conversion signal generator. The U-shaped seat is arranged symmetrically on the inner upper end of the storage tank. Inside the U-shaped seat, the vertical chute on the outer arc surface of the threaded tube is slidingly connected with the vertical slide bar corresponding to the inner arc wall of the hollow tube. The conductive contacts are respectively set on the upper ends of the two threaded tubes, and the frequency conversion signal generator is set At the inner lower end of the shell, the frequency conversion signal generator is connected in series between the two conductive contacts through wires;

Wherein: the lower end of the front side of the housing is provided with a single-chip microcomputer, the inner bottom of the housing is provided with a storage battery, the input terminal of the single-chip microcomputer is electrically connected to the output terminal of the storage battery, and the output terminal of the frequency conversion signal generator is electrically connected to the input terminal of the single-chip microcomputer, which can be quickly completed The phase sequence check of the frequency conversion power line is simple and practical to operate, and the conductive contacts can be stored and protected when not in use, so as to prevent the conductive contacts from being corroded by the external environment and affecting subsequent use.

Further, the checking unit also includes an internally threaded cylinder, the internally threaded cylinders are respectively connected to the upper ends of the two hollow cylinders through bearing rotation, and the internally threaded cylinders are all screwed to the vertically corresponding threaded pipes, so that the conductive contact Adjust the position of the head.

Further, the middle part of the upper surface of the housing is provided with a sliding chamber, the interior of the sliding chamber is slidably connected with a lifting column, and the outer arc surface of the lifting column is provided with a hook, and the hook is located in the communication groove between the sliding chamber and the storage groove , The middle part of the front side of the protective cover is provided with a card slot, and the hook and the card slot are arranged in cooperation to realize the locking and fixing of the protective cover.

Further, the rear end surface of the hook is inclined backward from top to bottom, which can ensure the normal development of follow-up work.

Further, the inner bottom surface of the sliding chamber is provided with a spring, and the upper end of the spring is fixedly connected with the lifting column, which can prompt the lifting column to automatically move up and reset.

Further, rubber anti-skid pads are provided on the left and right sides of the housing, which can increase the coefficient of friction between the palm of the person and the housing to prevent the housing from falling off.

Furthermore, the rear side of the housing is provided with a splint, which can fix the device in the pocket of the personnel's tooling, reducing the carrying burden of the personnel.

Compared with the prior art, the beneficial effect of the utility model is: the new frequency conversion power line phase sequence checking device has the following advantages:

1. When checking the phase sequence of the frequency conversion power line, the personnel manually twist the threaded tube. Affected by the thread connection relationship between the threaded tube and the threaded tube, the threaded tube can gradually protrude from the inside of the hollow tube, thereby changing the two The position of the conductive contact, and then the personnel will connect the two conductive contacts into the frequency conversion power line respectively, so that the frequency conversion signal generator is connected in series to the inside of the frequency conversion power line, and the frequency conversion signal generator is used as a tool for testing the consistency of the line , so that the test signal only propagates in the single phase of this line and does not enter other two-phase lines through the distribution transformer on the frequency conversion power line, so as to judge whether the phase sequence of each phase of this line is consistent, and quickly complete the phase sequence of the frequency conversion power line The operation of the calibration work is simple and practical, and then the frequency conversion signal generator feeds back the final test data to the single-chip microcomputer, and then through the cooperation of the display screen and the indicator light, the calibration results are intuitively presented for personnel to observe.

2. After the use is completed, the personnel press down on the lifting column. At this time, the lifting column will drive the hook to move down together to release the engagement state of the hook and the slot. Then the personnel will open the cover backward and release the lifting column. At this time, the lifting column will be affected by the elastic potential energy of the spring, which will drive the hook to move up and reset, and then the personnel will open the protective cover backwards, and then manually reset the protective cover after the personnel screw the two hollow cylinders into the storage tank. This process The middle protective cover will first contact with the rear end slope of the hook. With the continuous application of force by the personnel, the hook will drive the lifting column to overcome the elastic force of the spring and move down. When the hook enters the inside of the slot, the lifting column will be pressed The influence of the elastic potential energy of the spring will drive the hook to move up automatically, so that the hook and the slot are engaged again to realize the sealing of the protective cover, and the conductive contact can be stored and protected when not in use, so as to prevent the conductive contact from being damaged. The erosion of the external environment will affect the subsequent use.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is a schematic diagram of the rear view structure of the utility model;

Fig. 3 is the schematic diagram of enlarged structure of place A of the utility model;

Fig. 4 is a schematic diagram of the internal structure of the utility model in a right-view plane;

Fig. 5 is a schematic diagram of an enlarged structure at B of the present invention.

In the figure: 1 shell, 2 display screen, 3 indicator light, 4 storage slot, 5 checking unit, 51 U-shaped seat, 52 hollow cylinder, 53 threaded pipe, 54 conductive contact, 55 frequency conversion signal generator, 56 internal thread Barrel, 6 single-chip microcomputers, 7 protective covers, 8 sliding chambers, 9 lifting columns, 10 hooks, 11 card slots, 12 springs, 13 rubber anti-skid pads, 14 splints, 15 storage batteries.

Detailed ways

The technical solutions in the embodiments of the present invention will be 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. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Please refer to Figures 1-5, this embodiment provides a technical solution: a new phase sequence checking device for variable frequency power lines, including a housing 1 and a checking unit 5;

Housing 1: a display screen 2 is provided at the upper end of the front side, uniformly distributed indicator lights 3 are provided at the middle of the front side of the housing 1, a storage slot 4 is provided at the upper end of the rear side of the housing 1, and the lower edge of the storage slot 4 passes through a hinge A protective cover 7 is hinged, and through the cooperation of the display screen 2 and the indicator light 3, the calibration results can be presented intuitively for personnel to observe;

Checking unit 5: including U-shaped seat 51, hollow cylinder 52, threaded pipe 53, conductive contact 54 and frequency conversion signal generator 55, U-shaped seat 51 is symmetrically arranged on the inner upper end of storage tank 4, and hollow cylinder 52 respectively passes through The pin shaft is rotatably connected to the inside of the two U-shaped seats 51, the vertical chute on the outer arc of the threaded pipe 53 is slidably connected to the vertical sliding bar corresponding to the inner arc wall of the hollow tube 52, and the conductive contacts 54 are respectively arranged on the two The upper end of a threaded pipe 53, the frequency conversion signal generator 55 is arranged at the inner lower end of the housing 1, the frequency conversion signal generator 55 is connected in series between the two conductive contacts 54 through wires, and the checking unit 5 also includes an internal thread cylinder 56, the inner threaded cylinder 56, The threaded cylinders 56 are respectively connected to the upper ends of the two hollow cylinders 52 through bearing rotation, and the internally threaded cylinders 56 are threadedly connected with the vertically corresponding threaded pipes 53. When checking the phase sequence of the frequency conversion power line, the personnel manually twist the thread The pipe 53 is affected by the thread connection relationship between the threaded tube 56 and the threaded tube 53, so that the threaded tube 53 can gradually protrude from the inside of the hollow tube 52, thereby changing the positions of the two conductive contacts 54, and then the personnel will connect the two The conductive contacts 54 are respectively connected to the variable frequency power line, so that the frequency variable signal generator 55 is connected in series to the inside of the variable frequency power line, and the frequency variable signal generator 55 is used as a tool for testing the consistency of the line, so that the test signal is only in a single line of the line. Phase transmission will not enter other two-phase lines through the distribution transformer on the frequency conversion power line, so as to judge whether the phase sequence of each phase of this line is consistent, and quickly complete the phase sequence check of the frequency conversion power line, the operation is simple and practical;

Wherein: the lower end of the front side of the shell 1 is provided with a single-chip microcomputer 6, and the inner bottom of the shell 1 is provided with a battery 15, the input end of the single-chip microcomputer 6 is electrically connected to the output end of the battery 15, and the output end of the frequency conversion signal generator 55 is electrically connected to the single-chip microcomputer 6. input.

Among them: the middle part of the upper surface of the housing 1 is provided with a sliding chamber 8, the interior of the sliding chamber 8 is slidingly connected with a lifting column 9, and the outer arc surface of the lifting column 9 is provided with a hook 10, and the hook 10 is located between the sliding chamber 8 and the storage groove 4 In the connecting groove between them, the middle part of the front side of the protective cover 7 is provided with a card slot 11, and the hook 10 is arranged in cooperation with the card slot 11. The inner bottom surface is provided with a spring 12, and the upper end of the spring 12 is fixedly connected with the lifting column 9. After the use is completed, the personnel presses the lifting column 9 downward, and the lifting column 9 will drive the hook 10 to move down together to release the hook 10 and In the engaged state of the card slot 11, the personnel then opens the protective cover 7 backwards and releases the lifting column 9. At this time, the lifting column 9 is affected by the elastic potential energy of the spring 12 and will drive the hook 10 to move up and reset, and then the personnel will open the protective cover. 7 is opened backward, and after the personnel screw the two hollow tubes 52 into the interior of the storage tank 4, manually reset the protective cover 7. During this process, the protective cover 7 will preferentially contact the rear end slope of the hook 10. Continue to apply force, the hook 10 will drive the lifting column 9 to overcome the elastic force of the spring 12 and move down together. Move up, so that the hook 10 and the slot 11 are engaged again to realize the blocking of the protective cover 7, and the conductive contact 54 can be stored and protected when not in use, so as to prevent the conductive contact 54 from being corroded by the external environment. affect subsequent use.

Wherein: the left and right sides of the housing 1 are provided with rubber anti-skid pads 13, which can increase the coefficient of friction between the palm of the person and the housing 1, so as to prevent the housing 1 from being released.

Wherein: the rear side of the shell 1 is provided with a splint 14, which can fix the device in the pocket of the personnel's tooling, reducing the carrying burden of the personnel.

The working principle of a new type of frequency conversion power line phase sequence check device provided by the utility model is as follows: when performing phase sequence check work on the frequency conversion power line, the personnel manually twist the threaded tube 53, and the threaded tube 56 and the threaded tube 53 Influenced by the threaded connection relationship, the threaded tube 53 can gradually protrude from the inside of the hollow tube 52, thereby changing the positions of the two conductive contacts 54, and then the personnel connect the two conductive contacts 54 into the frequency conversion power line respectively, The variable frequency signal generator 55 is connected in series to the inside of the variable frequency power line, and the frequency variable signal generator 55 is used as a tool for testing the consistency of the line, so that the test signal only propagates in the single phase of the line without passing through the power distribution on the variable frequency power line The transformer enters the other two-phase lines to judge whether the phase sequence of each phase of this line is consistent, and quickly completes the phase sequence check of the frequency conversion power line. The operation is simple and practical, and then the frequency conversion signal generator 55 will feed back the final test data to the single-chip microcomputer 6, and then through the cooperation of the display screen 2 and the indicator light 3, the check result is intuitively presented for personnel to observe. Move down together to release the engaging state of the hook 10 and the slot 11, and then the personnel will open the cover 7 backwards and release the lifting column 9. At this time, the lifting column 9 will drive the hook 10 under the influence of the elastic potential energy of the spring 12. Move up and reset. After the personnel screw the two hollow cylinders 52 into the storage tank 4, manually reset the cover 7. During this process, the cover 7 will preferentially contact the rear end slope of the hook 10. As the personnel continue to When the force is applied, the hook 10 will drive the lifting column 9 to overcome the elastic force of the spring 12 and move down together. When the hook 10 enters the inside of the slot 11, the lifting column 9 will drive the lifting column 9 to automatically go up under the influence of the elastic potential energy of the spring 12. Move, so that the hook 10 and the slot 11 are engaged again to realize the sealing of the protective cover 7, and the conductive contact 54 can be stored and protected when not in use, so as to prevent the conductive contact 54 from being affected by the erosion of the external environment. Subsequent use.

It is worth noting that what the single-chip microcomputer 6 disclosed in the above embodiments selects is the S7-200 single-chip microcomputer, and what the frequency conversion signal generator 55 selects is the DG-8000 frequency conversion signal generator, and the single-chip microcomputer 6 controls the frequency conversion signal generator 55 work to adopt existing methods commonly used in technology.

The above descriptions are only examples of the utility model, and are not intended to limit the patent scope of the utility model. Any equivalent structure or equivalent process transformation made by using the utility model specification and accompanying drawings may be directly or indirectly used in other applications. Related technical fields are all included in the patent protection scope of the present utility model in the same way.

Claims (7)

1. Novel checking device for phase sequence of variable-frequency power line is characterized in that: comprises a shell (1) and a checking unit (5);

outer casing (1): the upper end of the front side surface of the shell (1) is provided with a display screen (2), the middle part of the front side surface of the shell (1) is provided with evenly distributed indicator lamps (3), the upper end of the rear side surface of the shell (1) is provided with a storage groove (4), and the edge of the lower end of the storage groove (4) is hinged with a protecting cover (7) through a hinge;

a checking unit (5): the novel variable-frequency power supply device comprises U-shaped bases (51), hollow cylinders (52), threaded pipes (53), conductive contacts (54) and variable-frequency signal generators (55), wherein the U-shaped bases (51) are symmetrically arranged at the upper ends of the interiors of storage grooves (4) left and right, the hollow cylinders (52) are respectively connected to the interiors of the two U-shaped bases (51) through pin shafts in a rotating mode, vertical sliding grooves of outer cambered surfaces of the threaded pipes (53) are correspondingly connected with vertical sliding strips formed in inner arc walls of the hollow cylinders (52) in a sliding mode, the conductive contacts (54) are respectively arranged at the upper ends of the two threaded pipes (53), the variable-frequency signal generators (55) are arranged at the lower ends of the interiors of the outer shell (1), and the variable-frequency signal generators (55) are connected between the two conductive contacts (54) in series through wires;

wherein: the front side lower extreme of shell (1) is equipped with singlechip (6), and the inside bottom of shell (1) is equipped with battery (15), and the output of battery (15) is connected to the input electricity of singlechip (6), and the input of singlechip (6) is connected to the output electricity of variable frequency signal generator (55).

2. The novel variable-frequency power line phase sequence checking device according to claim 1, wherein: the checking unit (5) further comprises an internal thread cylinder (56), the internal thread cylinders (56) are respectively connected to the upper ends of the two hollow cylinders (52) through bearings in a rotating mode, and the internal thread cylinders (56) are in threaded connection with vertically corresponding threaded pipes (53).

3. The novel variable-frequency power line phase sequence checking device according to claim 1, wherein: the utility model discloses a sliding door of shell (1), including shell (1), upper surface middle part is equipped with smooth chamber (8), and the inside sliding connection of smooth chamber (8) has lift post (9), and the extrados of lift post (9) is equipped with pothook (10), and pothook (10) are located the intercommunication inslot between smooth chamber (8) and storage tank (4), and the leading flank middle part of protecting cover (7) is equipped with draw-in groove (11), and pothook (10) and draw-in groove (11) cooperation set up.

4. A novel variable frequency power line phase sequence checking device according to claim 3, wherein: the rear end face of the clamping hook (10) is obliquely arranged backwards from top to bottom.

5. A novel variable frequency power line phase sequence checking device according to claim 3, wherein: the inner bottom surface of the sliding cavity (8) is provided with a spring (12), and the upper end of the spring (12) is fixedly connected with the lifting column (9).

6. The novel variable-frequency power line phase sequence checking device according to claim 1, wherein: rubber anti-slip pads (13) are arranged on the left side surface and the right side surface of the shell (1).

7. The novel variable-frequency power line phase sequence checking device according to claim 1, wherein: the rear side of the shell (1) is provided with a clamping plate (14).

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