CN114302610A - Differential current out-of-limit defect analysis equipment - Google Patents

Abstract

The invention discloses a differential flow out-of-limit defect analysis device which comprises an analysis instrument, a box body and a box cover, wherein the analysis instrument is arranged in the box body, the box cover is covered on the box body, the analysis instrument comprises a display screen, a sampling module, an analysis module and a protective shell, the box cover comprises an upper cover and a front cover which are integrally formed, one side of the upper cover, far away from the front cover, is rotatably hinged with the box body, and a locking piece is arranged between the front cover and the box body; one side of the protective shell is provided with a long-strip bulge, the box body is provided with a sliding groove for the long-strip bulge to slide in, an arc-shaped elastic sheet is arranged in the sliding groove, and the box body is also provided with a limiting plate for limiting the protective shell along the vertical direction; all be equipped with the shock pad between protective housing and box and the limiting plate, the side all is equipped with the air vent around the protective housing, has all seted up the louvre on box rear side and the protecgulum, and radiator fan is installed to louvre department. The invention can well give consideration to the damping effect and the heat dissipation effect in the process of carrying the analytical instrument and is convenient for taking and placing the analytical instrument.

Description

Differential current out-of-limit defect analysis equipment

Technical Field

The invention belongs to the field of power line monitoring equipment, and particularly relates to differential current out-of-limit defect analysis equipment.

Background

The national grid company is dedicated to building an intelligent and strong power grid, effective measures are taken for the weak link of a main grid with a high voltage level, the weak link is an important link, bus faults and transformer faults are serious faults of two power systems, and when the bus faults occur, all circuit breakers connected to the section of bus are cut off, so that regional large-area power failure can be caused; when transformer faults occur, circuit breakers on all sides of the transformer are cut off, the load carrying capacity of the whole substation of the transformer substation is reduced, loads of other main transformers are increased, and safety and stability of a power system are not facilitated. In order to avoid damage to primary equipment caused by faults, a relay protection department designs differential protection to correspondingly protect a transformer, the differential protection is based on a relay protection principle of kirchhoff current law, whether differential current (difference current for short, difference current between current flowing into the transformer and current flowing out of the transformer) exceeds a setting value is monitored, and when the differential current is monitored to be larger than the setting value, a differential protection device can control circuit breakers on all sides of the transformer to jump off, only the fault part is cut off, and negative effects on all stations are reduced. However, during the long-term operation of the differential protection device, the differential current may be out of limit, that is, the differential current is greater than the out-of-limit value, which may cause the failure of the differential protection device, and at this time, a maintainer needs to perform an emergency inspection process, and during the process, a differential current out-of-limit defect analysis device needs to be used. The core of the analysis equipment comprises an analysis instrument, wherein the analysis instrument comprises a display screen, a sampling module, an analysis module and a protective shell, the analysis instrument is connected with a differential protection device, data acquisition is carried out through the acquisition module, then the analysis module judges the defect reason causing the differential flow out of limit, and a worker can eliminate the defect reason.

For conveniently carrying among the prior art, generally put into an incasement with analytical instrument is whole, for reducing the rocking that carries the in-process and lead to the fact analytical instrument, avoid key component because of rocking not hard up, generally can set up the shock pad between protective housing and incasement wall, just so cause the heat that analytical instrument during operation produced to obtain in time dispel the heat. In addition, in order to ensure the relative fixation of the analysis instrument and the box, the protective shell and the box are generally connected together through screws and threads, when the analysis instrument needs to be taken and placed due to the fact that elements are loose, modules are damaged or cleaning is needed, operation is inconvenient, and meanwhile, holes in the protective shell are prone to abrasion after the threaded connection structure is used for multiple times, and connection is not stable.

Disclosure of Invention

The invention aims to provide a differential current out-of-limit defect analysis device, which can effectively solve the problem that the shock absorption effect and the heat dissipation effect cannot be considered simultaneously in the carrying process of an analysis instrument in the prior art, and is convenient for taking and placing the analysis instrument.

In order to solve the technical problems, the invention adopts the following technical scheme: the differential flow out-of-limit defect analysis equipment comprises an analysis instrument, a box body and a box cover, wherein the analysis instrument is arranged in the box body, the box cover covers the box body, the analysis instrument comprises a display screen, a sampling module, an analysis module and a protective shell, the protective shell covers one side of the display screen, a containing cavity for containing the sampling module and the analysis module is further formed between the display screen and the protective shell, the box cover comprises an upper cover and a front cover which are integrally formed, one side, away from the front cover, of the upper cover is rotatably hinged with the box body, and a locking part is arranged between the front cover and the box body; the side, away from the display screen, of the protective shell is provided with a long-strip protrusion, the side wall of one side of the box body is provided with a sliding groove for the long-strip protrusion to slide in, an arc-shaped elastic sheet used for abutting against the long-strip protrusion is arranged in the sliding groove, the side wall of one side of the box body is further provided with a limiting plate used for limiting the protective shell in the vertical direction, and the side wall of the other side of the box body is provided with transparent glass used for displaying the display screen; be equipped with first shock pad between protective housing and box one side lateral wall, be equipped with the second shock pad between protective housing and the limiting plate, all be equipped with the air vent on the front side of protective housing and the rear side, all seted up the louvre on box rear side and the protecgulum, be located radiator fan is installed to the louvre department on the box rear side.

Preferably, the arc-shaped groove is formed in the strip protrusion, and when the strip protrusion completely slides into the sliding groove, the arc-shaped elastic sheet is clamped into the arc-shaped groove. Through the arc wall that sets up and arc shell fragment cooperation joint, can increase the limiting displacement of arc shell fragment to the protective housing along the horizontal direction, further guarantee stability, reduce and rock relatively.

Preferably, the arc-shaped elastic sheet is arranged at one end of the sliding groove close to the rear side of the box body. Locate the back side with arc shell fragment, like this when the installation or dismantle analytical instrument, only need the rectangular arch of a segment to take place the friction with arc shell fragment on the protective housing, reduce the resistance that receives when impelling or pulling out, and then operating personnel is more laborsaving.

Preferably, the internal surface of protecgulum is equipped with the spacing arch that is used for with the protective housing butt, be equipped with the third shock pad between spacing arch and the protective housing. Like this spacing arch of accessible and box rear side lateral wall cooperate and carry out along fore-and-aft direction spacing to analytical instrument, further reduce the risk of rocking relatively, and the third shock pad of accessible alleviates in addition and rocks the adverse effect that causes the analytical instrument, further reduces the not hard up risk of key part.

Preferably, a filter screen is detachably installed at the position of the heat dissipation hole on the rear side of the case body. By arranging the filter screen, dust can be filtered and adsorbed on the filter screen, and meanwhile, external dust can be prevented from entering; in addition, the filter screen is detachably designed, so that collected dust can be cleaned regularly.

Preferably, the retaining member includes hasp and locking handle, the hasp rotates to articulate on the locking handle, the locking handle rotates to articulate on box lateral wall surface, offer the locked groove that supplies the hasp chucking on the protecgulum, the locking handle is used for driving hasp and locked groove locking or separation. Therefore, when the box cover needs to be opened or closed, only the locking handle needs to be rotated to separate or lock the lock catch from the lock groove, and the operation is very convenient.

Preferably, the box body is provided with a step for embedding the box cover, and the step is provided with a sealing strip. Therefore, the sealing performance of the protection box can be guaranteed, dust is prevented from entering the protection box, and the cleaning times are reduced.

Preferably, a push-pull handle is arranged on the protective shell. The analyzer is convenient for an operator to hold to push or pull the analyzer, and is convenient to take and place.

Compared with the prior art, the invention has the following beneficial effects:

1. the upper cover and the front cover are arranged into the integrated box cover, so that the exposed area of the box body can be increased when the box cover is opened, and the analysis instrument is convenient to mount and dismount;

2. when the analysis instrument is installed, the analysis instrument is pushed in to the place only along the sliding groove, the protective shell can be limited through the arc-shaped elastic sheet, and the analysis instrument is pulled out when the analysis instrument is disassembled, so that the analysis instrument is very convenient to disassemble and assemble when the analysis instrument needs to be overhauled;

3. the protective shell is limited horizontally through the arc-shaped elastic sheet, the analysis instrument is limited vertically through the matching of the limiting plate and the bottom of the box body, the relative stability of the analysis instrument is ensured, and the risk of key element loosening caused by shaking is reduced;

4. first shock pad sets up between protective housing and box one side, and the second shock pad sets up between protective housing and limiting plate, and the part sets up the shock pad and can play the shock attenuation effect, and the rethread is opened in the front and back side of protective housing and is established the air vent, opens at box rear side and protecgulum and establishes the louvre, utilizes radiator fan at box and the inside formation of protective housing along the ascending heat dissipation channel of fore-and-aft direction for the air flow, makes the heat that the analytical instrument during operation produced can spill fast.

Drawings

FIG. 1 is a schematic diagram of a differential over-limit defect analysis apparatus according to an embodiment of the present invention;

FIG. 2 is a side view of a differential flow out-of-limit defect analysis apparatus with a lid open according to an embodiment;

FIG. 3 shows a sectional view of the analysis device in the embodiment in the vertical direction;

FIG. 4 is a horizontal sectional view of the side wall of the case and the protective case in the embodiment;

fig. 5 is an enlarged schematic view of portion a of fig. 2.

Wherein: 1. the novel multifunctional dust remover comprises a box body, a sliding groove 10, an arc-shaped elastic sheet 11, a limiting plate 12, transparent glass 13, a shock pad 14, a wiring hole 15, a heat dissipation hole 16, a filter screen 160, a box cover 2, an upper cover 20, a front cover 21, a locking groove 210, a limiting protrusion 22, a protective shell 3, a wiring terminal 30, a strip protrusion 31, an arc-shaped groove 310, a display screen 4, a cooling fan 5, a locking piece 6, a locking handle 60 and a lock catch 61.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, it is to be understood that the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the terms "mounted," "connected," "fixed," and the like are to be construed broadly and may, for example, be fixedly connected or detachably connected or integrated; may be mechanically coupled, may be electrically coupled or may be in communication with each other; may be directly connected or indirectly connected through an intermediate, unless otherwise specifically limited. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Example (b): as shown in fig. 1 to 4, the present embodiment provides a differential current out-of-limit defect analysis apparatus, which includes an analyzer, a case 1 and a case lid 2, the analyzer is disposed in the case 1, the case lid 2 is covered on the case 1, the analyzer includes a display screen 4, a sampling module, an analysis module and a protective shell 33, the protective shell 33 is covered on one side of the display screen 4, a containing cavity for containing the sampling module and the analysis module is further formed between the display screen 4 and the protective shell 33, wherein the sampling module includes an AD7607 current sampling module and an AD9910 voltage sampling module, a protruding connection terminal 30 is disposed outside the protective shell 33, a through hole for extending the connection terminal 30 is disposed on the case 1, during data sampling, the current sampling module and the voltage sampling module are connected to a differential protection device through the connection terminal 30, the analysis module selects a special data analysis module with model number of SH11MBV2.4, the analysis module can determine the willingness of the defects causing the differential flow to exceed the limit, and the sampling information and the analysis result are displayed to an operator through the display screen 4. The above structures and the working principle of the analyzer are all the contents in the prior art, and are not described herein again.

The case cover 2 in the embodiment comprises an upper cover 20 and a front cover 21 which are integrally formed, one side, away from the front cover 21, of the upper cover 20 is hinged to the case body 1 in a rotating mode, a locking piece 6 is arranged between the front cover 21 and the case body 1, and the upper cover 20 and the front cover 21 are arranged into the case cover 2 which is integrated, so that the exposed area of the case body 1 can be increased when the case cover 2 is opened, and the analysis instrument can be conveniently mounted and dismounted. In the embodiment, the long-strip-shaped protrusion 31 is further arranged on one side, away from the display screen 4, of the protective shell 33, the sliding groove 10 for the long-strip-shaped protrusion 31 to slide into is formed in the side wall of one side of the box body 1, the arc-shaped elastic piece 11 used for being tightly abutted to the long-strip-shaped protrusion 31 is arranged in the sliding groove 10, the limiting plate 12 used for limiting the protective shell 33 in the vertical direction is further arranged on the side wall of one side of the box body 1, and the transparent glass 13 used for displaying the display screen 4 is arranged on the side wall of the other side of the box body 1, so that an analytical instrument is only required to be pushed into place along the sliding groove 10 when being installed, the protective shell 33 can be limited through the arc-shaped elastic piece 11, and the analytical instrument can be pulled out when being disassembled, and therefore, when the analytical instrument is required to be overhauled, the disassembly and assembly are very convenient; in addition, it is spacing along the horizontal direction to protective housing 33 through arc shell fragment 11, and the bottom cooperation through limiting plate 12 and box 1 is spacing along vertical direction to analytical instrument, guarantees analytical instrument's relative stability, reduces and causes the not hard up risk of key component because of rocking. In order to achieve the shock absorbing performance and the heat dissipating performance, in the present embodiment, the shock absorbing pad 14 is disposed between the protective casing 33 and the side wall of the case 1, for convenience of description, the first shock absorbing pad is disposed therein, the shock absorbing pad 14 is also disposed between the protective casing 33 and the limiting plate 12, the second shock absorbing pad is disposed therein, the front side and the rear side of the protective casing 33 are both provided with air holes, the rear side of the case 1 and the front cover 21 are both provided with heat dissipating holes 16, the heat dissipating fan 5 is installed at the heat dissipating holes 16 located on the rear side of the case 1, the first shock absorbing pad is disposed between the protective casing 33 and the side of the case 1, the second shock absorbing pad is disposed between the protective casing 33 and the limiting plate 12, the shock absorbing effect can be achieved by partially disposing the shock absorbing pads, the air holes are disposed on the front and rear sides of the protective casing 33, the heat dissipating holes are disposed on the rear side and the front cover 21 of the case 1, and the heat dissipating channel in the front and rear direction is formed by the heat dissipating fan 5 inside the case 1 and the limiting plate 33, the air flow is accelerated, so that the heat generated by the analytical instrument during working can be quickly dissipated. Specifically, the first shock pad is arranged on the side wall of one side of the box body 1, and the second shock pad is arranged on the limiting plate 12. In addition, for convenient operation, the protective shell 33 is provided with a push-pull handle in the embodiment, so that the operator can conveniently hold the analytical instrument to push or pull the analytical instrument out, and the analytical instrument can be conveniently taken and placed.

For further promoting arc shell fragment 11 to the tight effect of supporting of protective housing 33, improve connection stability, still be equipped with arc wall 310 in this embodiment on rectangular arch 31, and when rectangular arch 31 slides in spout 10 completely, arc shell fragment 11 card is gone into in the arc wall 310, through the arc wall 310 that sets up with the 11 cooperation joints of arc shell fragment, can increase arc shell fragment 11 to protective housing 33 along the limiting displacement of horizontal direction, further guarantee stability, reduce and rock relatively. Further, locate the one end that spout 10 is close to box 1 rear side with arc shell fragment 11 in this embodiment, like this when installation or dismantlement analytical instrument, only need the rectangular protruding 31 of a segment to take place the frictional action with arc shell fragment 11 on the protective housing 33, reduce the resistance that receives when impeling or pulling out, and then operating personnel is more laborsaving.

In addition, in this embodiment, a limiting protrusion 22 for abutting against the protective shell 33 is further disposed on the inner surface of the front cover 21, and a shock pad, that is, a third shock pad, is also disposed between the limiting protrusion 22 and the protective shell 33, and specifically, the third shock pad is fixedly disposed on the limiting protrusion 22. Spacing arch 22 of accessible cooperatees with box 1 rear side lateral wall like this and carries out the spacing along the fore-and-aft direction to analytical instrument, further reduces the risk of rocking relatively, and it can be understood that, binding post 30 on the protective housing 33 stretches out behind wiring hole 15, and binding post 30 place side and the inboard butt in box 1 rear portion on the protective housing 33 can realize consequently that spacing arch 22 cooperatees with box 1 rear side lateral wall and carries out the spacing purpose along the fore-and-aft direction to protective housing 33. In addition, set up third shock pad accessible third shock pad and alleviate the adverse effect that rocks and cause the analysis appearance, further reduce the not hard up risk of key part.

In order to avoid excessive accumulation of dust in the box body 1 and reduce the cleaning times of workers, a filter screen 160 is detachably mounted at the heat dissipation hole 16 on the rear side of the box body 1 in the embodiment, and by arranging the filter screen 160, dust can be filtered and adsorbed on the filter screen 160 and can be prevented from entering; in addition, the filter screen 160 is detachably designed, so that collected dust can be cleaned regularly.

As shown in fig. 5, the locking member 6 of this embodiment is constructed as follows: the locking part 6 comprises a lock catch 61 and a locking handle 60, the lock catch 61 is rotatably hinged on the locking handle 60, the locking handle 60 is rotatably hinged on the outer surface of the side wall of the box body 1, a fixing block is arranged on the front cover 21, a locking groove 210 for clamping the lock catch 61 is formed in the fixing block, the locking handle 60 is used for driving the lock catch 61 to be locked or separated with the locking groove 210, therefore, when the box cover 2 needs to be opened or closed, only the locking handle 60 needs to be rotated to separate or lock the lock catch 61 with the locking groove 210, the operation is very convenient, concretely, the lock catch 61 can be driven to be close to or far away from the locking groove 210 through the rotation of the locking handle 60 relative to the box body 1, and when the lock catch 61 is close to the locking groove 210, the lock catch 61 can be locked on the locking groove 210 through the rotation of the lock catch 61, or separated and separated from the lock groove.

For guaranteeing the leakproofness, be equipped with the step that supplies case lid 2 embedding on box 1 in this embodiment, be equipped with the sealing strip on the step, can guarantee the leakproofness of guard box like this, reduce the dust and get into, and then reduce clean number of times.

The above description is only an embodiment of the present invention, but the technical features of the present invention are not limited thereto, and any changes or modifications within the technical field of the present invention by those skilled in the art are covered by the claims of the present invention.

Claims (8)

1. The utility model provides a differential flow defect analysis equipment that transfinites, includes analytical instrument, box (1) and case lid (2), analytical instrument locates in box (1), case lid (2) lid closes on box (1), and analytical instrument includes display screen (4), sampling module, analysis module and protective housing (3), one side at display screen (4) is established to protective housing (3) cover, still be formed with between display screen (4) and protective housing (3) and be used for holding sampling module and analysis module hold the chamber, its characterized in that: the box cover (2) comprises an upper cover (20) and a front cover (21) which are integrally formed, one side, far away from the front cover (21), of the upper cover (20) is rotatably hinged with the box body (1), and a locking piece (6) is arranged between the front cover (21) and the box body (1); a long-strip-shaped bulge (31) is arranged on one side, away from the display screen (4), of the protective shell (3), a sliding groove (10) for the long-strip-shaped bulge (31) to slide into is formed in the side wall of one side of the box body (1), an arc-shaped elastic sheet (11) which is tightly abutted to the long-strip-shaped bulge (31) is arranged in the sliding groove (10), a limiting plate (12) used for limiting the protective shell (3) in the vertical direction is further arranged on the side wall of one side of the box body (1), and transparent glass (13) used for displaying the display screen (4) is arranged on the side wall of the other side of the box body (1);

be equipped with first shock pad between protective housing (3) and box (1) one side lateral wall, be equipped with the second shock pad between protective housing (3) and limiting plate (12), all be equipped with the air vent on the front side and the rear side of protective housing (3), louvre (16) have all been seted up on box (1) rear side and protecgulum (21), are located louvre (16) department on box (1) rear side installs radiator fan (5).

2. The differential flow out-of-limit defect analysis device of claim 1, wherein: arc-shaped grooves (310) are formed in the strip-shaped protrusions (31), and when the strip-shaped protrusions (31) completely slide into the sliding grooves (10), the arc-shaped elastic pieces (11) are clamped into the arc-shaped grooves (310).

3. The differential current off-limit defect analysis device of claim 2, wherein: the arc-shaped elastic sheet (11) is arranged at one end of the sliding groove (10) close to the rear side of the box body (1).

4. The differential flow out-of-limit defect analysis device of claim 1, wherein: the internal surface of protecgulum (21) is equipped with spacing arch (22) that are used for with protective housing (3) butt, be equipped with the third shock pad between spacing arch (22) and protective housing (3).

5. The differential flow out-of-limit defect analysis device of claim 1, wherein: a filter screen (160) is detachably arranged at the heat dissipation hole (16) positioned at the rear side of the box body (1).

6. The differential flow out-of-limit defect analysis device of claim 1, wherein: retaining member (6) are including hasp (61) and locking handle (60), hasp (61) rotate to articulate on locking handle (60), locking handle (60) rotate to articulate on box (1) lateral wall surface, offer locked groove (210) that supply hasp (61) chucking on protecgulum (21), locking handle (60) are used for driving hasp (61) and locked or separation of locked groove (210).

7. The differential flow out-of-limit defect analysis device of claim 1, wherein: the box body (1) is provided with a step for embedding the box cover (2), and the step is provided with a sealing strip.

8. The differential flow out-of-limit defect analysis device of claim 1, wherein: the protective shell (3) is provided with a push-pull handle.

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