CN114302610A - A differential current over-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

A differential current over-limit defect analysis equipment

technical field

The invention belongs to the field of power line monitoring equipment, and in particular relates to a differential current over-limit defect analysis equipment.

Background technique

State Grid Corporation is committed to building a smart and strong power grid, and taking effective measures for the weak links of the high-voltage main grid is an important part of it. Bus fault and transformer fault are two serious faults in the power system. When a bus fault occurs, All circuit breakers connected to this section of the bus will be cut off, which may lead to large-scale regional power outages; when a transformer fault occurs, the circuit breakers on all sides of the transformer will be cut off, which will reduce the load on the entire substation. capacity, and increase the load of other main transformers, which is not conducive to the safety and stability of the power system. In order to avoid damage to primary equipment due to faults, the relay protection department has designed differential protection to protect the transformer accordingly. flow, which is the difference between the current flowing into the transformer and the current flowing out of the transformer) whether it exceeds the set value. When the differential current is detected to be greater than the set value, the differential protection device can control the circuit breakers on each side of the transformer to trip, and only cut off the The faulty part reduces the negative impact on the whole station. However, during the long-term operation of the differential protection device, the differential current may exceed the limit, that is, the differential current is greater than the limit value, which may cause the differential protection device to fail. , it is necessary to use the differential flow out-of-limit defect analysis equipment during processing. The core of the analysis equipment includes an analysis instrument. The analysis instrument includes a display screen, a sampling module, an analysis module and a protective shell. The analysis instrument is connected to the differential protection device, data is collected through the acquisition module, and then the differential flow is determined by the analysis module. If the defect cause exceeds the limit, the staff can eliminate the defect cause.

In the prior art, in order to facilitate portability, the analytical instrument is generally placed in a box as a whole. In order to reduce the shaking of the analytical instrument during the carrying process and avoid the loosening of key components due to shaking, it is generally installed between the protective shell and the inner wall of the box. Therefore, the heat generated by the analytical instrument cannot be dissipated in time. In addition, in order to ensure the relative fixation of the analytical instrument and the box, the protective shell and the box are generally connected together by screw threads. When the components are loose, the module is damaged or needs to be cleaned, the analytical instrument needs to be taken and placed, which is inconvenient to operate, and the thread After the connection structure is used for many times, the openings on the protective shell are easily worn, resulting in unstable connection.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a differential current over-limit defect analysis device, which can effectively solve the problem that the shock absorption effect and the heat dissipation effect cannot be taken into account during the carrying process of the analytical instrument in the prior art, and at the same time facilitate the taking and placing of the analytical instrument.

In order to solve the above-mentioned technical problems, the present invention adopts the following technical scheme: a differential flow over-limit defect analysis equipment, including an analysis instrument, a box body and a box cover, the analysis instrument is arranged in the box body, and the box cover is closed on the box cover. On the box body, the analytical instrument includes a display screen, a sampling module, an analysis module and a protective shell, the protective shell cover is provided on one side of the display screen, and a space for accommodating the sampling module and the analysis device is also formed between the display screen and the protective shell. the accommodating cavity of the module, the box cover includes an integrally formed upper cover and a front cover, the side of the upper cover away from the front cover is hinged with the box body, and a locking member is arranged between the front cover and the box body; The side of the protective shell away from the display screen is provided with a long protrusion, the side wall of the box body is provided with a chute for sliding the long protrusion into, and the chute is provided with An arc-shaped shrapnel that protrudes and abuts tightly, a limit plate for limiting the protective shell in the vertical direction is also provided on one side wall of the box body, and a display screen is provided on the other side wall of the box body A first shock-absorbing pad is arranged between the protective shell and one side wall of the box body, a second shock-absorbing pad is arranged between the protective shell and the limit plate, and the front and rear sides of the protective shell are Both are provided with ventilation holes, the rear side of the box body and the front cover are both provided with cooling holes, and a cooling fan is installed at the cooling holes on the rear side of the box body.

Preferably, the elongated protrusion is provided with an arc-shaped groove, and when the elongated protrusion is completely slid into the chute, the arc-shaped elastic piece is snapped into the arc-shaped groove. By arranging the arc-shaped grooves that are engaged with the arc-shaped shrapnel, the limiting effect of the arc-shaped shrapnel on the protective shell in the horizontal direction can be increased, and the stability can be further ensured and relative shaking can be reduced.

Preferably, the arc-shaped elastic piece is arranged at one end of the chute close to the rear side of the box. The arc-shaped shrapnel is set at the rear end, so that when installing or disassembling the analytical instrument, only a small long protrusion on the protective shell is required to rub against the arc-shaped shrapnel, reducing the resistance when pushing or pulling out, and then operating Staff are more labor-saving.

Preferably, the inner surface of the front cover is provided with a limiting protrusion for abutting with the protective shell, and a third shock pad is provided between the limiting protrusion and the protective shell. In this way, the analysis instrument can be limited in the front-rear direction through the cooperation of the limit protrusion and the rear side wall of the box, which further reduces the risk of relative shaking. In addition, the third shock-absorbing pad can be used to reduce the unfavorable effects of shaking on the analyzer. impact, further reducing the risk of key components loosening.

Preferably, a filter screen is detachably installed at the heat dissipation hole on the rear side of the box body. By setting the filter screen, the dust can be filtered and adsorbed on the filter screen, and at the same time, external dust can be prevented from entering; in addition, the filter screen is detachable design, which is convenient for regular cleaning of the collected dust.

Preferably, the locking member includes a lock catch and a locking handle, the lock catch is hinged on the locking handle, the locking handle is hinged on the outer surface of the side wall of the box body, and the front cover is open There is a lock groove for the lock to be fastened, and the locking handle is used to drive the lock to lock or separate from the lock groove. In this way, when the box cover needs to be opened or closed, it is only necessary to turn the locking handle to separate or lock the lock catch and 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. In this way, the sealing of the protective box can be ensured, the entry of dust can be reduced, and the number of cleanings can be reduced.

Preferably, a push-pull handle is provided on the protective shell. It is easy for the operator to hold to push or pull out the analytical instrument for easy access.

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

1. By setting the upper cover and the front cover as an integrated box cover, the exposed area of the box body can be increased when the box cover is opened, which is convenient for the installation and disassembly of the analytical instrument;

2. When installing the analytical instrument, you only need to push the analytical instrument into place along the chute. The protective shell can be limited by the arc-shaped shrapnel, and the analytical instrument can be pulled out when disassembling. During maintenance, disassembly and assembly are very convenient;

3. The protective shell is limited in the horizontal direction through the arc-shaped shrapnel, and the analytical instrument is limited in the vertical direction through the cooperation of the limit plate and the bottom of the box, so as to ensure the relative stability of the analytical instrument and reduce the loosening of key components caused by shaking. risks of;

4. The first shock-absorbing pad is arranged between the protective shell and one side of the box, and the second shock-absorbing pad is arranged between the protective shell and the limit plate. Open ventilation holes on the front and rear sides of the protective shell, and open cooling holes on the rear side of the box and the front cover. Use a cooling fan to form a cooling channel in the front and rear directions inside the box and the protective shell to speed up the air flow and make the analytical instrument work. The heat generated can be dissipated quickly.

Description of drawings

FIG. 1 is a schematic diagram of a differential current over-limit defect analysis device provided by an embodiment of the present invention;

Figure 2 is a side view of a differential flow over-limit defect analysis device provided by the embodiment when the box cover is opened;

The cross-sectional view of the analysis device along the vertical direction in the embodiment of Fig. 3;

Figure 4 is a cross-sectional view of the side wall of the box body and the protective shell along the horizontal direction in the embodiment;

FIG. 5 is an enlarged schematic view of part A in FIG. 2 .

Among them: 1. Box, 10. Chute, 11. Curved shrapnel, 12. Limit plate, 13. Transparent glass, 14. Shock pad, 15. Wiring hole, 16. Heat dissipation hole, 160. Filter, 2. Box cover, 20. Upper cover, 21. Front cover, 210. Lock groove, 22. Limit protrusion, 3. Protective shell, 30. Terminal block, 31. Long strip protrusion, 310. Arc groove, 4. Display screen, 5. Cooling fan, 6. Locking piece, 60. Locking handle, 61. Lock.

Detailed ways

The following describes in detail the embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary, and are intended to explain the present invention and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the terms "first" and "second" are only used for the purpose of description, and should not be construed as indicating or implying relative importance; the terms "installed", "connected", "connected" ”, “fixed” and other terms should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integrated; it can be a mechanical connection, an electrical connection or can communicate with each other; it can be directly connected, It can also be indirectly connected through an intermediary unless otherwise expressly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

Embodiment: As shown in Figures 1 to 4, this embodiment provides a differential flow over-limit defect analysis equipment, including an analysis instrument, a box body 1 and a box cover 2, the analysis instrument is set in the box body 1, and the box cover is 2. The cover is closed on the box body 1, and the analysis instrument 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, and the display screen 4 and the protective shell 33 are also formed. There is an accommodating cavity for accommodating the sampling module and the analysis module, wherein the sampling module includes the AD7607 current sampling module and the AD9910 voltage sampling module, the protective shell 33 is provided with a protruding terminal 30, and the box 1 is provided with an extension for the terminal 30. When the data is sampled, the current sampling module and the voltage sampling module are connected to the differential protection device through the terminal 30. The analysis module selects a special data analysis module with model SH11MBV2.4. Through the analysis of the analysis module, it can be determined that the difference caused by the Defects that exceed the flow limit are willing, and the sampling information and analysis results are displayed to the operator through the display screen 4. The above structure and the working principle of the analysis instrument are the contents of the prior art, and will not be repeated here.

The box cover 2 in this embodiment includes an upper cover 20 and a front cover 21 that are integrally formed. The side of the upper cover 20 away from the front cover 21 is hinged to the box body 1 , and a lock is provided between the front cover 21 and the box body 1 . Part 6, by setting the upper cover 20 and the front cover 21 into a box cover 2, the exposed area of the box body 1 can be increased when the box cover 2 is opened, which facilitates the installation and removal of the analytical instrument. In this embodiment, a long protrusion 31 is also provided on the side of the protective shell 33 away from the display screen 4 , and a chute 10 into which the long protrusion 31 slides is provided on the side wall of the box body 1 . The chute 10 An arc-shaped elastic piece 11 for pressing against the elongated protrusion 31 is provided inside, and a limit plate 12 for limiting the position of the protective shell 33 along the vertical direction is also provided on one side wall of the box body 1. The box body 1 The other side wall is provided with a transparent glass 13 for showing the display screen 4, so that when installing the analytical instrument, it is only necessary to push the analytical instrument into place along the chute 10. To limit the position, the analytical instrument can be pulled out when disassembling, so that it is very convenient to disassemble and assemble when the analytical instrument needs to be repaired; 12 cooperates with the bottom of the box body 1 to limit the position of the analytical instrument along the vertical direction to ensure the relative stability of the analytical instrument and reduce the risk of loosening of key components due to shaking. In order to take into account both the shock absorption performance and the heat dissipation performance, in this embodiment, a shock absorbing pad 14 is provided between the protective shell 33 and the side wall of the box body 1. For the convenience of description, this place is the first shock absorbing pad. There is also a shock pad 14 between 33 and the limit plate 12, which is the second shock pad, the front side and the rear side of the protective shell 33 are provided with ventilation holes, the rear side of the box body 1 and the front cover 21 A heat dissipation hole 16 is opened on the upper part, and a heat dissipation fan 5 is installed at the heat dissipation hole 16 on the rear side of the box body 1; It is arranged between the protective shell 33 and the limit plate 12, and the shock-absorbing pad can be provided locally to achieve a shock-absorbing effect. Then, by opening ventilation holes on the front and rear sides of the protective shell 33, the rear side of the box body 1 and the front cover 21 are opened. The heat dissipation hole 16 uses the heat dissipation fan 5 to form a heat dissipation channel in the front and rear directions inside the box body 1 and the protective shell 33 to speed up the air flow, so that the heat generated by the analytical instrument can be quickly dissipated. Specifically, the first shock absorbing pad is arranged on one side wall of the box body 1 , and the second shock absorbing pad is arranged on the limiting plate 12 . In addition, for the convenience of operation, in this embodiment, a push-pull handle is provided on the protective shell 33, which is convenient for the operator to hold to push or pull out the analytical instrument, thereby facilitating access.

In order to further enhance the pressing effect of the arc-shaped elastic pieces 11 on the protective shell 33 and improve the connection stability, in this embodiment, an arc-shaped groove 310 is also provided on the elongated protrusion 31, and when the elongated protrusion 31 is completely slid in When the chute 10 is installed, the arc-shaped elastic piece 11 is snapped into the arc-shaped slot 310. By setting the arc-shaped slot 310 to be engaged with the arc-shaped elastic piece 11, the limit of the arc-shaped elastic piece 11 to the protective shell 33 in the horizontal direction can be increased. function to further ensure stability and reduce relative shaking. Further, in the present embodiment, the arc-shaped elastic piece 11 is arranged at one end of the chute 10 close to the rear side of the box body 1, so that when installing or disassembling the analytical instrument, only a small section of the elongated protrusion 31 and the arc are required on the protective shell 33. The shrapnel 11 has a friction effect, reducing the resistance when pushing or pulling out, so that the operator is more labor-saving.

In addition, in this embodiment, the inner surface of the front cover 21 is also provided with a limit protrusion 22 for abutting with the protective shell 33, and a shock pad is also provided between the limit protrusion 22 and the protective shell 33, that is, The third shock-absorbing pad, specifically, the third shock-absorbing pad is fixed on the limiting protrusion 22 . In this way, the analytical instrument can be limited in the front-rear direction through the cooperation of the limiting protrusion 22 with the rear side wall of the box 1, thereby further reducing the risk of relative shaking. After exiting the wiring hole 15 , the side where the wiring terminal 30 is located on the protective shell 33 is in contact with the inner side of the rear of the box body 1 , so that the limit protrusion 22 can cooperate with the rear side wall of the box body 1 to move the protective shell 33 forward and backward. The purpose of the direction limit. In addition, setting the third shock pad can reduce the adverse effect of shaking on the analyzer through the third shock pad, and further reduce the risk of loosening of key components.

In order to avoid excessive accumulation of dust in the box body 1 and reduce the cleaning times of the staff, in this embodiment, a filter screen 160 is also detachably installed at the heat dissipation hole 16 on the rear side of the box body 1. The mesh 160 can filter and adsorb dust on the filter mesh 160, and can also prevent external dust from entering; in addition, the filter mesh 160 is detachable and designed to facilitate regular cleaning of the collected dust.

5, the structure of the locking member 6 in this embodiment is as follows: the locking member 6 includes a lock catch 61 and a locking handle 60, the lock catch 61 is hinged on the locking handle 60, and the locking handle 60 is hinged by rotation On the outer surface of the side wall of the box body 1, the front cover 21 is provided with a fixing block, and the fixing block is provided with a lock groove 210 for the lock catch 61 to be locked. The locking handle 60 is used to drive the lock catch 61 to lock with the lock groove 210. In this way, when the box cover 2 needs to be opened or closed, it is only necessary to turn the locking handle 60 to separate or lock the lock catch 61 from the lock groove 210. The operation is very convenient. The rotation of the body 1 can drive the lock catch 61 to approach or move away from the lock slot 210 , so when the lock catch 61 is close to the lock groove 210 , the lock catch 61 can be rotated again to lock the lock catch 61 on the lock groove 210 , or be separated from it. open.

To ensure airtightness, in this embodiment, the box body 1 is provided with a step for embedding the case cover 2, and the step is provided with a sealing strip, which can ensure the airtightness of the protective box, reduce dust entry, and thus reduce the number of cleanings.

The above are only specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any changes or modifications made by those skilled in the art in the field of the present invention are all covered by the patent scope of the present invention. among.

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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