CN220795265U - Shock-resistant SF6 density relay - Google Patents

Abstract

The utility model provides an anti-seismic SF6 density relay, which comprises: the relay comprises a relay body, wherein the relay body comprises a watchcase, a fixing hole for installing the base is formed in the side face of the watchcase, and a welding hole communicated with the fixing hole is formed in the bottom of the watchcase; the base comprises a connecting end and a fixed end matched with the fixed hole, the fixed end is arranged in the fixed hole, the connecting end covers the fixed hole, and the base is abutted to the bottom of the watchcase; fixing the watchcase and the base along the welding holes and the gaps between the fixing holes and the base, and forming a right-angle welding structure; the utility model forms a right-angle welding structure between the radial direction and the axial direction of the watchcase, increases the structural strength of the connection between the base and the watchcase, improves the integral shock resistance of the SF6 density relay, prolongs the service life of the SF6 density relay, and improves the monitoring reliability of the SF6 density relay.

Description

Shock-resistant SF6 density relay

Technical Field

The utility model relates to a density relay, in particular to an anti-seismic SF6 density relay.

Background

SF6 density relay is an important protection and control element in the electric power system, is a monitoring instrument for guaranteeing the reliable operation of the breaker in the transformer substation, and if the breaker breaks down, great economic loss can be caused, various indexes of the breaker, especially SF6 gas, must be monitored frequently to guarantee the operation reliability of the breaker, and the specification of relevant standards must be reached, so that the SF6 breaker can keep a good working state for a long time. The arc extinguishing medium and the insulating medium of the SF6 electrical equipment are SF6 gas, and the safety operation of the SF6 electrical equipment is seriously affected by the occurrence of gas leakage of the SF6 electrical equipment and the exceeding of micro water content of the SF6 gas.

Along with the continuous improvement of the safety and reliability requirements of high-voltage switch equipment and matched products thereof in the operation of a power grid, corresponding requirements such as higher shock resistance, higher contact stability, higher contact precision and the like are also provided for the SF6 density relay. However, the conventional SF6 density relay is only a welding structure of the arc surface of the base and the arc surface of the watchcase, the connecting position is single and weak, vibration is generated when the field circuit breaker actually operates, so that the whole instrument and the watchcase generate non-directional swinging force, and finally, the welding structure position is acted to cause cracking, oil leakage and sealing failure, so that monitoring indexes are abnormal, and serious electrical accidents are caused.

Disclosure of Invention

In view of the above-mentioned shortcomings of the prior art, the technical problem to be solved by the present utility model is to provide an anti-seismic SF6 density relay, which solves the technical problems in the prior art that the connection position between the SF6 density relay base and the watchcase is single and weak, when the field circuit breaker actually operates, vibration is generated to enable the whole instrument and the watchcase to generate an unoriented swinging force, and finally, the vibration force is applied to the welding structure position to cause cracking, oil leakage and sealing failure to cause abnormal monitoring indexes, thereby causing serious electric accidents.

In order to solve the technical problems, the utility model provides an anti-seismic SF6 density relay, which comprises: a relay body and a base;

the relay comprises a relay body, wherein the relay body comprises a watchcase, a fixing hole for installing the base is formed in the side face of the watchcase, and a welding hole communicated with the fixing hole is formed in the bottom of the watchcase;

the base comprises a connecting end and a fixed end matched with the fixed hole, the fixed end is arranged in the fixed hole, the connecting end covers the fixed hole, and the base is abutted to the bottom of the watchcase; and fixing the watchcase and the base along the welding holes and the gaps between the fixing holes and the base, and forming a right-angle welding structure.

As a more preferable mode, the outer contour of the watchcase is a cylinder, the side surface of the base connecting end is provided with an arc welding surface matched with the arc surface of the cylinder, and the arc welding surface is welded with a gap of the arc surface of the cylinder; therefore, the SF6 density relay is welded on the arc surface of the base and the arc surface of the watch case, and the fixed end of the base is welded with the welding hole at the bottom of the watch case, so that a right-angle welding structure is formed between the radial direction and the axial direction of the watch case, the structural strength of the connection of the base and the watch case is increased, and the shock resistance of the whole SF6 density relay is improved.

As a more preferable mode, three welding holes are arranged; thus, the fixed end of the base forms three-point welding with the watch case on the axial surface of the watch case, so that the welding is firmer, the base is firmer to be connected with the watch case, and the structural strength of the base and the fixing of the watch case is increased.

As a more preferable mode, the watch further comprises a joint mouth, wherein the bottom of the connecting end of the base passes through the fixing hole of the watch case and is welded with the joint mouth; the connector is connected to a breaker air chamber of a transformer substation through a flange, and the running state of the breaker is monitored, so that the running reliability of the breaker is ensured.

As a more preferable mode, the watch further comprises a cover, wherein the cover is arranged at the upper part of the watch case, and the front surface of the cover is covered and provided with a digital display screen through a sealing ring; therefore, the digital display screen is installed on the front face of the cover cap through the sealing ring in a covering mode, the sealing ring can play a sealing role to prevent dust from entering the digital display screen, the digital display screen is used for displaying the pressure value of SF6 gas, errors of manual reading are avoided, and accordingly the running state of the circuit breaker is judged correctly.

As a more preferable mode, the side surface of the watchcase is also provided with a convex communication interface; the communication interface is used for communication, can carry out real-time supervision to SF6 density relay, also can in time master the equipment state under unmanned on duty's condition to can arrange in time to overhaul, the emergence of accident can be more accurate stopped.

As a more preferable mode, a spring tube and a movement are arranged at the fixed end of the base, and a temperature compensation sheet is arranged between the spring tube and the movement; the temperature compensation sheet is used for automatically compensating the changed pressure, so that the rated pressure of the gas is maintained under the condition of no leakage, and the temperature compensation is realized, thereby correctly reflecting the pressure change caused by leakage rather than temperature change.

As a more preferable mode, the side surface of the watchcase is also provided with a sealing hole, and the sealing hole is sealed by a gas seal screw and a gasket; the sealed hole is in order to charge oil to SF6 density relay, because the circuit breaker of transformer substation can shake at the switching floodgate, charges oil and can be antidetonation, reduces the swing of inside core pointer, avoids the false contact of relay, reduces the probability of occurrence of false alarm.

As described above, the anti-seismic SF6 density relay has the following beneficial effects:

according to the anti-seismic SF6 density relay, the fixed end of the base is arranged in the fixed hole, the fixed hole is covered by the connecting end of the base, so that the base is abutted to the bottom of the watchcase, the watchcase and the base are mutually fixed through welding along the welding hole at the bottom of the watchcase and the gap between the fixed hole on the side surface of the watchcase and the base, a right-angle welding structure is formed, the structural strength of the base and the watchcase is improved, the relay is not cracked, leaked oil and failed in sealing due to vibration at the welding position of the base and the watchcase, the integral anti-seismic performance of the SF6 density relay is improved, the service life of the SF6 density relay is prolonged, and the monitoring reliability of the SF6 density relay is improved.

Drawings

FIG. 1 is a schematic diagram of a shock resistant SF6 density relay of the present utility model;

FIG. 2 is a schematic view of an alternative angle of the shock resistant SF6 density relay of the present utility model;

fig. 3 shows a side view of the shock resistant SF6 density relay of the present utility model.

Description of element reference numerals

1. Watch case

11. Welding hole

12. Communication interface

13. Seal hole

2. Base seat

21. Arc-shaped welding surface

3. Joint nozzle

4. Cover cap

Detailed Description

Further advantages and effects of the present utility model will become apparent to those skilled in the art from the disclosure of the present utility model, which is described by the following specific examples.

It should be understood that the structures, proportions, sizes, etc. shown in the drawings are for illustration purposes only and should not be construed as limiting the utility model to the extent that it can be practiced, since modifications, changes in the proportions, or otherwise, used in the practice of the utility model, are not intended to be critical to the essential characteristics of the utility model, but are intended to fall within the spirit and scope of the utility model. The following detailed description is not to be taken in a limiting sense, and the scope of embodiments of the present application is defined only by the claims of the issued patent. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. Spatially relative terms, such as "upper," "lower," "left," "right," "lower," "upper," and the like, may be used herein to facilitate a description of one element or feature as illustrated in the figures as being related to another element or feature.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," "held," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

Furthermore, as used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context indicates otherwise. It will be further understood that the terms "comprises," "comprising," "includes," and/or "including" specify the presence of stated features, operations, elements, components, items, categories, and/or groups, but do not preclude the presence, presence or addition of one or more other features, operations, elements, components, items, categories, and/or groups. The terms "or" and/or "as used herein are to be construed as inclusive, or meaning any one or any combination. Thus, "A, B or C" or "A, B and/or C" means "any of the following: a, A is as follows; b, a step of preparing a composite material; c, performing operation; a and B; a and C; b and C; A. b and C). An exception to this definition will occur only when a combination of elements, functions or operations are in some way inherently mutually exclusive.

In order to make the objects, technical solutions and advantages of the present utility model more apparent, further detailed description of the technical solutions in the embodiments of the present utility model will be given by the following examples with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

As shown in fig. 1, 2 and 3, the present utility model provides an anti-seismic SF6 density relay, comprising: a relay body and a base 2;

a relay body including a case 1, a fixing hole for mounting the base 2 being provided at a side of the case 1, a welding hole 11 communicating with the fixing hole being provided at a bottom of the case 1;

the base 2 comprises a connecting end and a fixed end matched with the fixed hole, the fixed end is arranged in the fixed hole, the connecting end covers the fixed hole, and the base 2 is abutted to the bottom of the watchcase 1; the case 1 and the base 2 are fixed along the welding hole 11 and the slit welding between the fixing hole and the base 2, and a right angle welding structure is formed.

When the SF6 density relay is installed, the fixed end of the base 2 is arranged in the fixed hole, the fixed hole is covered by the connecting end of the base 2, so that the base 2 is abutted to the bottom of the watchcase 1, the watchcase 1 and the base 2 are mutually fixed along the welding hole 11 at the bottom of the watchcase 1 and the gap welding between the fixed hole on the side surface of the watchcase 1 and the base 2, a right-angle welding structure is formed, the structural strength of the base 2 and the watchcase 1 is improved, the overall shock resistance of the SF6 density relay is improved, the service life of the SF6 density relay is prolonged, and the monitoring reliability of the SF6 density relay is improved.

In this embodiment, as shown in fig. 1, 2 and 3, the outer contour of the watchcase 1 is a cylinder, and an arc welding surface 21 adapted to the arc surface of the cylinder is disposed on the side surface of the connecting end of the base 2, and is welded with a gap of the arc surface of the cylinder along the arc welding surface 21; in this way, the SF6 density relay is welded on the arc welding surface 21 of the base 2 and the arc surface of the case 1, and the fixed end of the base 2 is welded with the welding hole 11 at the bottom of the case 1, so that a right angle welding structure is formed between the radial direction and the axial direction of the case 1, the structural strength of the connection between the base 2 and the case 1 is increased, and the shock resistance of the whole SF6 density relay is improved.

In this embodiment, as shown in fig. 1, 2 and 3, three welding holes 11 are provided; in this way, the fixed end of the base 2 forms three-point welding with the case 1 on the axial face of the case 1, so that the welding between the case 1 and the base 2 is firmer, and the base 2 and the case 1 are more firmly connected, thus increasing the structural strength of the base 2 and the case 1.

In this embodiment, as shown in fig. 1, 2 and 3, the base further comprises a connector 3, and the bottom of the connecting end of the base 2 passes through the fixing hole of the watchcase 1 and is welded with the connector 3; the connector 3 is connected to a breaker air chamber of a transformer substation through a flange, and monitors the running state of the breaker, so that the running reliability of the breaker is ensured.

In this embodiment, as shown in fig. 1, 2 and 3, the watch further comprises a cover 4, the cover 4 is mounted on the upper part of the watch case 1, and a digital display screen is mounted on the front surface of the cover 4 through a sealing ring; the outer contour of the cover 4 is cylindrical, the outer diameter of the cover 4 being the same as the outer diameter of the case 1; the front of shroud 4 closes through the sealing washer lid and installs digital display screen, the sealing washer can play sealed effect, prevents get into the dust in the digital display screen, digital display screen is used for showing SF6 gaseous pressure value, avoids the error of manual reading to correctly judge the running state of circuit breaker, avoid the emergence of incident.

Further, in this embodiment, as shown in fig. 1, 2 and 3, the side surface of the case 1 is further provided with a convex communication interface 12; the communication interface 12 is used for communication, so that the SF6 density relay can be monitored in real time, and the equipment state can be mastered in time under the unattended condition, thereby timely arranging maintenance and more accurately avoiding accidents.

Further, in this embodiment, as shown in fig. 1, 2 and 3, a spring tube and a movement are mounted at the fixed end of the base 2, and a temperature compensation plate is mounted between the spring tube and the movement; because the pressure of SF6 gas changes along with the change of temperature, in order to accurately reflect the pressure change caused by air leakage rather than temperature change, a temperature compensation or correction method is needed to ensure that the pressure indication instrument always corresponds to the standard pressure of 20 ℃ no matter how the external temperature changes, and the temperature compensation sheet is used for automatically compensating the changed pressure, so that the rated pressure is maintained under the condition of no leakage of the gas, the temperature compensation is realized, the pressure change caused by air leakage rather than temperature change can be accurately reflected, the running state of equipment is accurately judged, and the occurrence of safety accidents is avoided.

Further, in this embodiment, as shown in fig. 1, 2 and 3, the side surface of the case 1 is further provided with a sealing hole 13, and the sealing hole 13 is sealed by a gas seal screw and a gasket; the sealing hole 13 is used for filling oil into the SF6 density relay, and because the breaker of the transformer substation can vibrate when being opened and closed, the oil filling can resist vibration, the swinging of an inner core pointer is reduced, the false contact of the relay is avoided, and the occurrence probability of false alarm is reduced.

In summary, according to the anti-seismic SF6 density relay provided by the utility model, the fixed end of the base 2 is arranged in the fixed hole, the fixed hole is capped by the connecting end of the base 2, so that the base 2 is abutted to the bottom of the case 1, the case 1 and the base 2 are mutually fixed along the welding hole 11 at the bottom of the case 1 and the gap welding between the fixed hole on the side surface of the case 1 and the base 2, thereby forming a right-angle welding structure between the radial direction and the axial direction of the case 1, increasing the structural strength of the connection between the base 2 and the case 1, avoiding the problems of cracking, oil leakage and sealing failure of the relay due to vibration at the arc welding position of the base 2 and the case 1, improving the integral anti-seismic performance of the SF6 density relay, prolonging the service life of the SF6 density relay, and improving the monitoring reliability of the SF6 density relay. By adopting the technical scheme of the utility model, the pulse duration is 7ms, and the pulse times are 2 ten thousand times at the impact level of 60g, so that the good anti-seismic performance can be ensured. Therefore, the utility model effectively overcomes various defects in the prior art and has high industrial utilization value.

The above embodiments are merely illustrative of the principles of the present utility model and its effectiveness, and are not intended to limit the utility model. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the utility model. Accordingly, it is intended that all equivalent modifications and variations of the utility model be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.

Claims (8)

1. An anti-seismic SF6 density relay comprising: a relay body and a base (2);

the relay comprises a relay body, wherein the relay body comprises a watchcase (1), a fixing hole for installing the base (2) is formed in the side face of the watchcase (1), and a welding hole (11) communicated with the fixing hole is formed in the bottom of the watchcase (1);

the base (2) comprises a connecting end and a fixed end matched with the fixed hole, the fixed end is arranged in the fixed hole, the connecting end covers the fixed hole, and the base (2) is abutted to the bottom of the watchcase (1); and the watchcase (1) and the base (2) are mutually fixed along the welding holes (11) and the gaps between the fixing holes and the base (2) to form a right-angle welding structure.

2. The anti-seismic SF6 density relay according to claim 1, characterized in that the outer contour of the watchcase (1) is a cylinder, and the side surface of the connecting end of the base (2) is provided with an arc welding surface (21) adapted to the arc surface of the cylinder, and a gap between the arc welding surface (21) and the arc surface of the cylinder is welded.

3. An anti-shock SF6 density relay according to claim 1, characterized in that the welding holes (11) are arranged in three.

4. The shock resistant SF6 density relay according to claim 1, further comprising a nipple (3), the bottom of the connection end of the base (2) being welded to the nipple (3) through a fixing hole of the watch case (1).

5. The shock resistant SF6 density relay according to claim 1, further comprising a cover cap (4), said cover cap (4) being mounted on the upper part of said watch case (1), the front face of said cover cap (4) being mounted with a digital display screen by means of a sealing ring.

6. An anti-shock SF6 density relay according to claim 1, characterized in that the side of the watch case (1) is also provided with a male communication interface (12).

7. An anti-seismic SF6 density relay according to claim 1, characterized in that the fixed end of the base (2) is fitted with a spring tube and a movement between which a temperature compensation plate is fitted.

8. An anti-shock SF6 density relay according to claim 1, characterized in that the sides of the watch case (1) are also provided with sealing holes (13), which sealing holes (13) are sealed with gas seal screws and gaskets.