CN111863523A

CN111863523A - SF6 density relay double-layer hollow sun-proof heat shield

Info

Publication number: CN111863523A
Application number: CN202010771661.XA
Authority: CN
Inventors: 高钰; 孙静; 王楠; 张婷; 潘国熙; 杨方; 赵继维; 聂星; 汤雯; 程威; 周鸿肖
Original assignee: Guizhou Power Grid Co Ltd
Current assignee: Guizhou Power Grid Co Ltd
Priority date: 2020-08-04
Filing date: 2020-08-04
Publication date: 2020-10-30
Anticipated expiration: 2040-08-04
Also published as: CN111863523B

Abstract

The invention discloses a double-layer hollow sun-proof heat shield of an SF6 density relay, which comprises an outer-layer heat shield, an inner-layer heat shield, a partition plate, a ceiling and an observation window, wherein the partition plate is arranged between the outer-layer heat shield and the inner-layer heat shield, a gap is reserved between the outer-layer heat shield and the inner-layer heat shield, and the ceiling is pressed to extend out of the outer-layer heat shield, so that the density relay and glass can be conveniently cleaned. The device has the advantages that the double-layer heat insulation cover is arranged to relieve heat conduction, and heat in the sun-proof heat insulation cover is dissipated through the bottom of the sun-proof heat insulation cover; the first heat dissipation hole is arranged below the second heat dissipation hole, so that air can form convection, and a rainproof effect can be achieved.

Description

SF6 density relay double-layer hollow sun-proof heat shield

Technical Field

The invention relates to the technical field of relay protection devices, in particular to a double-layer hollow sun-proof heat-insulating cover for an SF6 density relay.

Background

Currently, in power systems, SF6 density relays function to monitor the leakage of plant gas by pressure reflecting the density of gas inside the power plant. However, the pressure value may be different due to the influence of the change in the ambient temperature. In order to accurately judge the change condition of SF6 density, a SF6 density controller with a temperature compensation function is usually adopted to monitor the change of gas density, the density value is indirectly reflected by a pressure value, and when the pressure is reduced to a set value, a low-pressure alarm or locking signal can be sent out.

Some low-voltage alarm or blocking signals are caused by sudden temperature difference and are used in some areas with high altitude, high latitude or strong direct sunlight. Because the temperature difference between the morning and the evening is large, the temperature of the SF6 gas density relay gradually rises from the morning along with the increase of direct sunlight, and the stronger the direct sunlight is, the faster the surface temperature rises. At this time, the actual temperature of the SF6 gas chamber does not rise synchronously with the gauge temperature, so that the gauge temperature is higher than the actual temperature of the gas chamber. The situation that the temperature of a standard air chamber in the density relay is higher than that of an air chamber of a circuit breaker body due to the fact that the temperature of the standard air chamber is over-compensated to cause low-pressure alarm of the density relay is caused because the external environment temperature is higher in summer and the direct solar radiation is severe after noon, and the situation that the low-pressure alarm of the density relay is caused occurs in a six-coil water 110kV jade house transformer substation, a 220kV haw transformer substation, a Guiyang and the like.

In addition, the density relay exposed and installed is influenced by rainwater, so that the secondary lead plugging box is sealed and invalid, and the problems of low-pressure alarm and locking signal mistakenly sent by the density relay due to the fact that an internal secondary contact is damped also occur occasionally.

Disclosure of Invention

This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. In this section, as well as in the abstract and the title of the invention of this application, simplifications or omissions may be made to avoid obscuring the purpose of the section, the abstract and the title, and such simplifications or omissions are not intended to limit the scope of the invention.

The present invention has been made in view of the above and/or other problems with the prior SF6 density relay.

Therefore, the problem to be solved by the invention is how to solve the problem of low pressure alarm of the SF6 density relay caused by temperature difference.

In order to solve the technical problems, the invention provides the following technical scheme: a double-layer hollow sun-proof heat shield of an SF6 density relay comprises an outer-layer heat shield, wherein the bottom of the outer-layer heat shield is not sealed, an additional part with a rectangular cross section is arranged on the side surface of the outer-layer heat shield, and a first hole is formed in the front surface of the outer-layer heat shield; the inner layer heat shield is arranged in the outer layer heat shield and is not in contact with the outer layer heat shield, and a second hole corresponding to the first hole is formed in the front face of the inner layer heat shield; and the partition plate is arranged between the outer-layer heat shield and the inner-layer heat shield.

As a preferable scheme of the double-layer hollow sun-proof heat shield of the SF6 density relay, the invention comprises the following steps: the outer heat shield side surface array is provided with a first heat dissipation hole, and the inner heat shield side surface array is provided with a second heat dissipation hole.

As a preferable scheme of the double-layer hollow sun-proof heat shield of the SF6 density relay, the invention comprises the following steps: the first heat dissipation hole is arranged below the second heat dissipation hole.

As a preferable scheme of the double-layer hollow sun-proof heat shield of the SF6 density relay, the invention comprises the following steps: the outer heat shield further comprises first guide plates arranged at the bottoms of the first radiating holes, the first guide plates are arranged in an upward inclined mode, the inner heat shield comprises second guide plates arranged above the second radiating holes, and the second guide plates are arranged in a downward inclined mode.

As a preferable scheme of the double-layer hollow sun-proof heat shield of the SF6 density relay, the invention comprises the following steps: the inner layer heat shield further comprises an arc plate arranged at the top end of the inner layer, the inner circle of the arc plate is an arc, and two ends of the arc plate are arc surfaces.

As a preferable scheme of the double-layer hollow sun-proof heat shield of the SF6 density relay, the invention comprises the following steps: the ceiling is arranged above the first hole, the vertical section of the ceiling is arc-shaped, and the circle center of the ceiling is the same as that of the first hole.

As a preferable scheme of the double-layer hollow sun-proof heat shield of the SF6 density relay, the invention comprises the following steps: the observation window is arranged between the outer layer heat shield and the inner layer heat shield and comprises glass, a glass frame for bearing the glass and attached to the inner layer heat shield, and a gear arranged on the side face of the glass frame; a first rack matched with the gear is arranged on the side surface of the glass frame; the ceiling comprises a second rack which is arranged inside the outer heat shield and matched with the gear, and a connecting column which is connected with the second rack and the ceiling; and two side surfaces of the glass frame are attached to the inner side surface of the outer layer heat shield.

As a preferable scheme of the double-layer hollow sun-proof heat shield of the SF6 density relay, the invention comprises the following steps: the baffle including set up in first baffle of first hole below, and set up in the second baffle of first baffle both sides, the height of first baffle is less than the second baffle, the second baffle include with the first sliding tray of glass frame complex, and set up in the inclined plane on top, the gear is fixed in outer heat exchanger that separates with between the second baffle.

As a preferable scheme of the double-layer hollow sun-proof heat shield of the SF6 density relay, the invention comprises the following steps: the outer layer heat shield also comprises a second sliding groove matched with the ceiling and a third sliding groove matched with the observation window.

As a preferable scheme of the double-layer hollow sun-proof heat shield of the SF6 density relay, the invention comprises the following steps: the outer layer heat shield is sprayed with a sun-proof coating.

The sun-proof heat shield has the beneficial effects that the double-layer heat shield is arranged to relieve heat conduction, and the heat in the sun-proof heat shield is dissipated through the bottom of the sun-proof heat shield; the first heat dissipation hole is arranged below the second heat dissipation hole, so that air can form convection, and a rainproof effect can be achieved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise. Wherein:

fig. 1 is a block diagram of a SF6 density relay double layer hollow sun shield heat shield of example 1.

Fig. 2 is an exploded view of the outer heat shield, inner heat shield and separator of the SF6 density relay double layer hollow sun shield of example 1.

Fig. 3 is a cross-sectional view of a SF6 density relay double layer hollow sun shield heat shield of example 1.

Fig. 4 is a view of the SF6 density relay double layer hollow sun shield with the outer heat shield removed from the heat shield of example 1.

Fig. 5 is a view of the ceiling and viewing window of the SF6 density relay double layer hollow sun shield heat shield of example 1.

FIG. 6 is a block diagram of another perspective view of the SF6 density relay double layer hollow sun shield heat shield of example 1

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.

Furthermore, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.

Example 1

Referring to fig. 1 to 6, for a first embodiment of the present invention, the first embodiment provides an SF6 density relay double-layer hollow sun-proof heat shield, and the SF6 density relay double-layer hollow sun-proof heat shield includes an outer heat shield 100, an inner heat shield 200, and a partition 300, wherein the partition 300 is disposed between the outer heat shield 100 and the inner heat shield 200, so that a gap is left between the outer heat shield 100 and the inner heat shield 200.

For the convenience of the following description, the direction in which the first hole 102 is viewed is defined as the forward direction.

Specifically, the bottom of the outer heat shield 100 is not sealed, the side surface is provided with an additional part 101 with a rectangular cross section, the front surface is provided with a first hole 102, the outer heat shield 100 can be made of plastic, and the first hole 102 is arranged to facilitate seeing the indicator of the SF6 density relay. The bottom of the outer layer heat shield 100 is not sealed, and the advantages are that: firstly, the inner layer heat shield 200 and the partition 300 are convenient to connect; secondly, the sun-proof heat insulation cover is conveniently sleeved on the density relay; and thirdly, the air flow is facilitated, and the temperature of the density relay is reduced. In reality, sensors are connected to the outer surfaces of SF6 density relays, and existing density relay sun-proof heat shields are not provided with parts matched with the sensors, so that a worker is very inconvenient to use, sometimes, the heat shields cannot be sleeved on the density relays at all, and the additional portion 101 is arranged to cover the sensors in the sun-proof heat shields.

The inner heat shield 200 is arranged inside the outer heat shield 100 and is not in contact with the outer heat shield, a second hole 201 corresponding to the first hole 102 is arranged on the front surface of the inner heat shield 200, and the second hole 201 is also used for facilitating the observation of a display table of an SF6 density relay.

The separator 300 is disposed between the outer heat shield 100 and the inner heat shield 200, and serves to connect the outer heat shield 100 and the inner heat shield 200 with a gap therebetween. Air can flow from the gap between the outer heat shield 100 and the inner heat shield 200, reducing the temperature of the density relay.

To sum up, the separator 300 is first adhered to the inside of the outer heat shield 100 by glue, and then the inner heat shield 200 is adhered to the separator 300.

Further, the outer heat shield 100 side array is provided with first louvre 103, the inner heat shield 200 side array is provided with second louvre 202, first louvre 103 set up in second louvre 202 below, when raining, the rainwater can beat on the inner heat shield 200 through first louvre 103, nevertheless can not get into inside the inner heat shield 200. The heat dissipation effect is achieved, and the rainproof effect is achieved.

Further, the outer heat shield 100 further comprises a first guide plate 104 arranged at the bottom of each first heat dissipation hole 103, the first guide plate 104 is arranged to be inclined upwards, the inner heat shield 200 comprises a second guide plate 203 arranged at the top of each second heat dissipation hole 202, the second guide plate 203 is arranged to be inclined downwards, when wind blows into the sun-proof heat shield from the first heat dissipation holes 103, most of the air flow can flow upwards through the first guide plate 104, and then guided by the second guide plate 203, so that most of the air flow enters the inner heat shield 200 and blows on the density relay, and the heat on the density relay is taken away, and a very good heat dissipation effect can be achieved.

Further, the inner heat shield 200 further comprises an arc plate 204 arranged at the top end of the inner portion, the inner circle of the arc plate 204 is an inner arc, and two ends of the arc plate 204 are arc surfaces. The arc-shaped plate 204 is arranged for clamping the SF6 density relay, and the commonly used SF6 density relay is cylindrical, so the inner circle of the arc-shaped plate 204 is an arc with an arc surface at two ends, and the SF6 density relay is conveniently guided into the inner circle of the arc-shaped plate 204.

Further, the sun shade further comprises a ceiling 400 and an observation window 500, wherein the ceiling 400 is arranged above the first hole 102, the vertical section of the ceiling 400 is in the shape of an arc, the circle center of the ceiling 400 is the same as that of the first hole 102, and the ceiling 400 is used for shading sun and rain. The observation window 500 is arranged between the outer heat shield 100 and the inner heat shield 200, and the observation window 500 comprises glass 501, a glass frame 502 which bears the glass 501 and is attached to the inner heat shield 200, and a gear 503 arranged on the side surface of the glass frame 502; a first rack 502a matched with the gear 503 is arranged on the side surface of the glass frame 502; the ceiling 400 comprises a second rack 401 which is arranged inside the outer heat shield 100 and is matched with the gear 503, and a connecting column 402 which is used for connecting the second rack 401 and the ceiling 400; the two sides of the glass frame 502 are attached to the inner side of the outer heat shield 100. The partition 300 includes a first partition 301 disposed below the first hole 102, and second partitions 302 disposed on both sides of the first partition 301, the first partition 301 has a height smaller than that of the second partition 302, the second partition 302 includes a first sliding groove 302a engaged with the glass frame 502, and an inclined surface 302b disposed at a top end, and the gear 503 is fixed between the outer heat shield 100 and the second partition 302. The outer heat shield 100 further includes a second sliding groove 105 engaged with the ceiling 400, and a third sliding groove 106 engaged with the observation window 500. Because the gear 503 is fixed, when the ceiling 400 is pressed, the second rack 401 moves downwards to drive the gear 503 to rotate, and the gear 503 drives the first rack 502a to move upwards, so that the glass 501 extends out of the outer layer heat insulation cover 100, and the glass can be scrubbed and replaced, and an SF6 density relay can be scrubbed and cleaned. When the glass is scrubbed or replaced, the canopy 400 is released and the glass frame 502 and glass 501 move downward under the force of gravity until they return to their original positions. The ceiling 400 is lighter than the combined weight of the glass frame 502 and the glass 501.

Furthermore, the outer heat shield 100 is sprayed with a sunscreen coating, and the sunscreen coating can effectively reflect infrared rays and ultraviolet rays, so as to achieve the purpose of heat insulation.

In summary, when sunlight irradiates the surface of the outer heat shield 100, the reflectivity of the sunscreen coating on the part of the sunscreen coating which reflects infrared rays and ultraviolet rays in the sunlight highly can reach 92%; after the heat reflected by the coating is reduced, part of infrared rays and ultraviolet rays are converted into heat on the outer heat shield 100; heat rethread is on outer heat exchanger 100 and the inlayer separates the clearance conduction between the heat exchanger 200 to inlayer heat exchanger 200, heat conduction efficiency has been reduced, and first louvre 103 and second louvre 202 can outwards distribute the heat in the sun-proof heat exchanger through the air convection again, and simultaneously, outer heat exchanger 100 separates heat exchanger 200 and also can play rain-proof ventilative effect with the inlayer, density relay's the difference in temperature has been reduced effectively, the difference in temperature reduces the back, the inside and outside pressure differential of density relay also can reduce, the emergence of "the low" alert wrong report of SF6 pressure "has been prevented.

It should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.

Claims

1. The utility model provides a SF6 density relay double-deck cavity sun-proof heat exchanger that separates which characterized in that: comprises the steps of (a) preparing a mixture of a plurality of raw materials,

the outer layer heat insulation cover (100) is unsealed at the bottom, an additional part (101) with a rectangular cross section is arranged on the side surface, and a first hole (102) is arranged on the front surface;

the inner-layer heat shield (200) is arranged in the outer-layer heat shield (100) and is not in contact with the outer-layer heat shield, and a second hole (201) corresponding to the first hole (102) is formed in the front face of the inner-layer heat shield (200); and the number of the first and second groups,

a separator (300) disposed between the outer heat shield (100) and the inner heat shield (200).

2. The SF6 density relay double-layer hollow sun shield heat shield of claim 1, wherein: the heat shield is characterized in that first heat dissipation holes (103) are formed in the side surface array of the outer heat shield (100), and second heat dissipation holes (202) are formed in the side surface array of the inner heat shield (200).

3. The SF6 density relay double layer hollow sun shield heat shield of claim 2, wherein: the first heat dissipation hole (103) is arranged below the second heat dissipation hole (202).

4. The SF6 density relay double-layer hollow sun shield heat shield of claim 3, wherein: the outer heat shield (100) further comprises first guide plates (104) arranged at the bottoms of the first heat dissipation holes (103), the first guide plates (104) are arranged in an upward inclined mode, the inner heat shield (200) comprises second guide plates (203) arranged above the second heat dissipation holes (202), and the second guide plates (203) are arranged in a downward inclined mode.

5. The SF6 density relay double-layer hollow sun shield heat shield of claim 4, wherein: the inner-layer heat shield (200) further comprises an arc-shaped plate (204) arranged on the top end of the inner portion, the inner circle of the arc-shaped plate (204) is an arc, and two ends of the arc-shaped plate (204) are arranged to be arc-shaped surfaces.

6. The SF6 density relay double-layer hollow sun shield heat shield of claim 5, wherein: the ceiling (400) is arranged above the first hole (102), the vertical section of the ceiling (400) is arc-shaped, and the circle center of the ceiling is the same as that of the first hole (102).

7. The SF6 density relay double-layer hollow sun shield heat shield of claim 6, wherein: the observation window (500) is arranged between the outer layer heat insulation cover (100) and the inner layer heat insulation cover (200), and the observation window (500) comprises glass (501), a glass frame (502) which bears the glass (501) and is attached to the inner layer heat insulation cover (200), and a gear (503) arranged on the side face of the glass frame (502); a first rack (502a) matched with the gear (503) is arranged on the side surface of the glass frame (502); the ceiling (400) comprises a second rack (401) which is arranged inside the outer heat shield (100) and is matched with the gear (503), and a connecting column (402) which is used for connecting the second rack (401) and the ceiling (400); and two side surfaces of the glass frame (502) are attached to the inner side surface of the outer heat insulation cover (100).

8. The SF6 density relay double-layer hollow sun shield heat shield of claim 7, wherein: the partition board (300) comprises a first partition board (301) arranged below the first hole (102) and second partition boards (302) arranged on two sides of the first partition board (301), the height of the first partition board (301) is smaller than that of the second partition board (302), the second partition board (302) comprises a first sliding groove (302a) matched with the glass frame (502) and an inclined surface (302b) arranged at the top end, and the gear (503) is fixed between the outer layer heat insulation cover (100) and the second partition board (302).

9. The SF6 density relay double layer hollow sun shield heat shield of claim 8, wherein: the outer heat shield (100) further comprises a second sliding groove (105) cooperating with the ceiling (400), and a third sliding groove (106) cooperating with the observation window (500).

10. The SF6 density relay double layer hollow sun shield heat shield of claim 9, wherein: the outer layer heat shield (100) is sprayed with a sun-proof coating.