CN217788274U

CN217788274U - Novel pressure relay

Info

Publication number: CN217788274U
Application number: CN202220885835.XU
Authority: CN
Inventors: 张斌; 胡世和
Original assignee: Shenyang Tak Kwong Electric Technology Co ltd
Current assignee: Shenyang Tak Kwong Electric Technology Co ltd
Priority date: 2022-04-18
Filing date: 2022-04-18
Publication date: 2022-11-11
Anticipated expiration: 2032-04-18

Abstract

The utility model relates to a transformer relay protection technical field just discloses a novel pressure relay, including lower, the seat of honour, electric outlet, data plate, seat of honour and lower fastening screw, electric binding post row, electric protection casing, alarm switch are fixed and adjustment frame, alarm switch support, electric insulation piece, positive pressure overvoltage screening glass, sealing washer between pressure alarm mechanism and the lower spare, vacuum negative pressure protection adjusting screw, vacuum negative pressure protection support column, bellows welding section of thick bamboo, bellows, pressure introducing port, first pressure alarm mechanism-alarm switch, second pressure alarm mechanism etc.. This novel pressure relay has the vacuum negative pressure protection support column and the vacuum negative pressure protection adjusting screw of fixing on the lower seat in the inboard of bellows for prevent that the bellows from being flattened by atmospheric pressure in the negative pressure environment and losing elasticity, thereby lead to the inaccurate or wrong report of alarm setting.

Description

Novel pressure relay

Technical Field

The utility model relates to a transformer relay protection technical field especially relates to a novel pressure relay.

Background

At present, the traditional oil-immersed or airtight power transformer uses the internal pressure change of the box body as a protection relay of an electric signal, which is also called as a pressure relay, and the key points of the relay protection are as follows: when the temperature in the transformer rises or the inside of the transformer breaks down, hydraulic pressure or air pressure in the oil tank is conducted into the cavity of the pressure relay, the corrugated pipe in the cavity is compressed or extended under pressure, and when a set pressure value is reached, the alarm switch is triggered to send an alarm signal to cut off a power supply, so that the oil tank of the transformer is protected, and the oil tank of the transformer is prevented from being damaged due to overhigh pressure.

The conventional pressure relay has the disadvantages that:

1. with the development of new energy transformers, a photovoltaic transformer is in a full-load working state when sunlight is sufficient, and when no sunlight exists at night, the transformer is in a low-load or shutdown state, particularly when the temperature difference between day and night inside the transformer is large in winter, the pressure inside a box body in the daytime is in a positive pressure state, the pressure inside the box body is possibly in a vacuum negative pressure state at night, an internal pressure element cannot bear a lower vacuum negative pressure state, and frequent positive pressure-negative pressure switching can cause the setting value of a pressure relay to lose efficacy within 1 to 2 years;

2. due to the characteristics of high voltage level and large power generation capacity, the transformer for the offshore new energy wind power needs to be vacuumized and then injected with oil in the transformer oil injection process, and the traditional pressure relay cannot meet the requirements at the moment;

3. the transformer for the offshore new energy wind power has the advantages that due to the special use environment, the pressure relay is required to bear sealing pressure which is multiple times of the alarm setting value in a short time, and when the pressure is recovered, the alarm setting value is continuously kept unchanged, and at the moment, the traditional pressure relay can cause the alarm mechanism to deform due to overhigh pressure, so that the pressure setting value is invalid, and the requirements of a use site are met.

To this end, we propose a new pressure relay.

SUMMERY OF THE UTILITY MODEL

The utility model discloses solve the technical problem that above-mentioned prior art exists, provide a novel pressure relay.

In order to achieve the purpose, the utility model adopts the following technical scheme that a novel pressure relay comprises a lower seat, an upper seat, an electric outlet, a nameplate, fastening screws of the upper seat and the lower seat, an electric wiring terminal row, an electric protective cover, an alarm switch fixing and adjusting frame, an alarm switch bracket, an electric insulating sheet, a positive pressure overvoltage protective sheet, a sealing ring between a pressure alarm mechanism and the lower seat, a vacuum negative pressure protection adjusting screw, a vacuum negative pressure protection support column, a corrugated pipe welding cylinder, a corrugated pipe, a pressure leading-in port, a first pressure alarm mechanism-alarm switch, a second pressure alarm mechanism, a pressure alarm value adjusting screw, a sealing ring of the upper seat and the lower seat and a grounding terminal;

the lower seat is used for fixing a product at any position on the transformer box body, and the first pressure alarm mechanism and the second pressure alarm mechanism are fixed on the lower seat; the first pressure alarm mechanism and the second pressure alarm mechanism are internally provided with a corrugated pipe welding cylinder; the corrugated pipe is welded in the corrugated pipe welding cylinder, the lower end of the corrugated pipe welding cylinder is inwards turned over, a hole in the middle of the inwards turned over edge is welded with the outer side of the opening end of the corrugated pipe to form a sealing structure, and the upper end of the corrugated pipe is a blind end; the vacuum negative pressure protection support column is fixed at the bottom of the hole in the lower seat hole and is positioned in the center of the corrugated pipe, and a vacuum negative pressure protection adjusting screw is screwed on the vacuum negative pressure protection support column; the positive pressure overpressure protection plate is arranged above the corrugated pipe welding cylinder, an alarm switch bracket is arranged above the positive pressure overpressure protection plate, and an alarm switch fixing and adjusting bracket is connected above the alarm switch bracket; the first pressure alarm mechanism-alarm switch and the second pressure alarm mechanism-alarm switch are respectively clamped by an electric insulation sheet and fixed on the alarm switch and an adjusting frame thereof by screws; the pressure alarm value adjusting screw is arranged between the alarm switch fixing and adjusting frame and the alarm switch bracket; the electric protective cover is arranged on the upper seat above the first pressure alarm mechanism and the second pressure alarm mechanism, an electric wiring terminal row fixed by screws is arranged above the electric protective cover, and grounding terminals are arranged on the plane outside the electric protective cover and the lower seat; the upper seat is fastened on the lower seat through screws and sealed by a sealing rubber ring, an electric outlet is arranged above the excircle of the upper seat, and a nameplate is arranged at the top of the upper seat.

Further, the vacuum negative pressure protection support column is fixed on the bottom of the hole in the lower seat hole and is positioned in the center of the corrugated pipe, and a vacuum negative pressure protection adjusting screw is screwed on the vacuum negative pressure protection support column and is used for preventing the corrugated pipe from being flattened by atmospheric pressure in a negative pressure environment and losing the characteristics of the elastic element.

Furthermore, the positive pressure overpressure protection plate is arranged above the bellows welding cylinder, so that the situation that the pressure alarm setting value fails due to the fact that the first pressure alarm mechanism or the second pressure alarm mechanism is deformed by internal overpressure is prevented.

Further, the pressure alarm value adjusting screw is arranged between the alarm switch fixing and adjusting frame and the alarm switch bracket and is used for adjusting the size of a gap between a trigger point of the first pressure alarm mechanism-the alarm switch and the second pressure alarm mechanism-the alarm switch and a blind end bulge of the corrugated pipe so as to adjust the pressure alarm value.

Advantageous effects

The utility model provides a novel pressure relay. The method has the following beneficial effects:

(1) This novel pressure relay has the vacuum negative pressure protection support column and the vacuum negative pressure protection adjusting screw of fixing on the seat down in the inboard of bellows for prevent that the bellows from being flattened by atmospheric pressure in the negative pressure environment and losing elasticity, thereby lead to the inaccurate or wrong report to the police of warning setting.

(2) This novel pressure relay is equipped with positive pressure overvoltage screening glass on a bellows welding section of thick bamboo, and the hole in the middle of the positive pressure overvoltage screening glass constitutes clearance fit with bellows cecum bulge, and after the inside malleation of bellows exceeded alarm pressure setting value, bellows shoulder terminal surface contact positive pressure screening glass lower surface of bellied below the bellows cecum bulge, form the limit structure who prevents the bellows and continue the extension, prevent that inside excessive pressure from leading to the fact pressure alarm mechanism top to warp advantages such as pressure alarm switch wrong report police or pressure setting value inefficacy.

Drawings

The structures, proportions, sizes, and other elements shown in the specification are for the understanding of the present disclosure, and are not intended to limit the scope of the present disclosure, which is defined by the claims, but rather by the claims.

FIG. 1 is a perspective view of the present invention;

FIG. 2 is a side sectional view of the present invention;

FIG. 3 is a schematic view of the upper seat of the present invention;

fig. 4 is a cross-sectional view of the present invention;

fig. 5 is an enlarged view of a portion a in fig. 4.

Illustration of the drawings:

1. a lower seat; 2. an upper seat; 3. an electrical outlet; 4. a nameplate; 5. the upper seat and the lower seat are fastened by screws; 6. an electrical terminal block; 7. an electrical shield; 8. the alarm switch is fixed and the adjusting frame thereof; 9. an alarm switch bracket; 10. an electrical insulation sheet; 11. positive pressure overpressure protection sheets; 12. a sealing ring is arranged between the pressure alarm mechanism and the lower seat part; 13. protecting and adjusting the screw by vacuum negative pressure; 14. vacuum negative pressure protection support columns; 15. a bellows welding cylinder; 16. a bellows; 17. a pressure introducing port; 18. a first pressure warning mechanism; 19. first pressure alarm mechanism-alarm switch; 20. second pressure alarm mechanism-alarm switch; 21. a second pressure alarm mechanism; 22. a pressure alarm value adjusting screw; 23. an upper seat and a lower seat sealing ring; 24. and a ground terminal.

Detailed Description

A novel pressure relay is shown in figures 1-5 and comprises a lower seat 1, an upper seat 2, an electric outlet 3, a nameplate 4, upper seat and lower seat fastening screws 5, an electric wiring terminal row 6, an electric protective cover 7, an alarm switch fixing and adjusting frame 8, an alarm switch support 9, an electric insulating sheet 10, a positive pressure overpressure protection sheet 11, a sealing ring 12 between a pressure alarm mechanism and a lower seat piece, a vacuum negative pressure protection adjusting screw 13, a vacuum negative pressure protection support column 14, a corrugated pipe welding cylinder 15, a corrugated pipe 16, a pressure inlet 17, a first pressure alarm mechanism 18, a first pressure alarm mechanism-alarm switch 19, a second pressure alarm mechanism-alarm switch 20, a second pressure alarm mechanism 21, a pressure alarm value adjusting screw 22, an upper seat and lower seat sealing ring 23 and a grounding terminal 24. The lower seat 1 can be used for fixing a product at any position on a transformer box body, a first pressure alarm mechanism 18 and a second pressure alarm mechanism 21 are fixed on the lower seat 1, a corrugated pipe welding cylinder 15 is arranged in the first pressure alarm mechanism 18 and the second pressure alarm mechanism 21, the upper end of the corrugated pipe welding cylinder 15 is outwards turned, the lower side of the turned edge is provided with the pressure alarm mechanism to form sealing with a sealing ring 12 between the lower seat, the lower end of the corrugated pipe welding cylinder 15 is inwards turned, a hole in the middle of the inwards turned edge is welded with the outer side of the opening end of a corrugated pipe 16 to form a sealing structure, the upper end of the corrugated pipe 16 is a blind end which can elastically stretch, a vacuum negative pressure protection support column 14 is fixed at the bottom of the hole in the lower seat 1 and is positioned at the center of the corrugated pipe 16, a vacuum negative pressure protection adjusting screw 13 is screwed on the vacuum negative pressure protection support column 14 and is used for preventing the corrugated pipe 16 from losing the characteristics of an elastic element due to atmospheric pressure in a negative pressure environment, a positive pressure overpressure protection sheet 11 is arranged on a welding cylinder of a corrugated pipe 16, a hole in the middle of the positive pressure overpressure protection sheet 11 and a convex part at the blind end of the corrugated pipe 16 form clearance fit, after the positive pressure in the corrugated pipe 16 exceeds the alarm pressure setting value by 1.2 to 1.4 times, a shoulder end face below the convex part at the blind end of the corrugated pipe 16 contacts the lower surface of the positive pressure overpressure protection sheet 11 to form a limit structure, the internal overpressure is prevented, the first pressure alarm mechanism 18 and the second pressure alarm mechanism 21 are deformed respectively to cause inaccurate pressure alarm setting value or false alarm, an alarm switch bracket 9 is arranged above the positive pressure overpressure protection sheet 11, an alarm switch fixing and adjusting bracket 8 is connected above the alarm switch bracket 9, the alarm switch fixing and adjusting bracket 8 is clamped by an electrical insulation sheet 10, and a first pressure alarm mechanism-alarm switch 19 and a second pressure alarm mechanism-alarm switch 20 which are fixed respectively by screws, the lower surfaces of trigger bulges of a first pressure alarm mechanism, an alarm switch 19 and a second pressure alarm mechanism, an alarm switch 20 are respectively opposite to the upper surface of a blind end bulge of a corrugated pipe 16, a pressure alarm value adjusting screw 13 is arranged between a fixed alarm switch and an adjusting frame 8 thereof and an alarm switch bracket 9 and is used for adjusting the size of a gap between the trigger point of the first pressure alarm mechanism, the alarm switch 19 and the alarm switch 20 and the blind end bulge of the corrugated pipe 16 to adjust the pressure alarm value, an electric protective cover 7 is arranged above the first pressure alarm mechanism 18 and the second pressure alarm mechanism 21, an electric wiring terminal row 6 fixed by screws is arranged above the electric protective cover 7, the utility model discloses a lead wire on 6 one end hookups first pressure alarm mechanism-alarm switch 19 of electric binding post row and second pressure alarm mechanism-alarm switch 20, the other end is used for the connection to go between the outer lead wire, has installed seat 2 in the outside of internal mechanism, is equipped with sealed rubber ring between seat 2 and lower seat 1 for waterproof, dustproof, and with screw-fastening, has installed electric outlet 3 above the excircle of seat 2, and data plate 4 has been installed at 2 tops of seat, the utility model discloses realize the inside pressure alarm value of accurate response transformer box, and need not pull down the product when evacuation oiling and transformer carry out the leakproofness malleation test, convenient to use reduces transformer operation risk, improves the efficiency of operation.

The foregoing shows and describes the basic principles and principal features of the invention, together with the advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention.

Claims

1. The utility model provides a novel pressure relay, including lower seat (1), upper seat (2), electric outlet (3), data plate (4), upper seat and lower seat fastening screw (5), electric binding post row (6), electric protection casing (7), alarm switch is fixed and alignment jig (8), alarm switch support (9), electrical insulation piece (10), positive pressure overvoltage protection piece (11), sealing washer (12) between pressure alarm mechanism and lower seat spare, vacuum negative pressure protection adjusting screw (13), vacuum negative pressure protection support column (14), bellows welding section of thick bamboo (15), bellows (16), pressure introducing port (17), first pressure alarm mechanism (18), first pressure alarm mechanism-alarm switch (19), second pressure alarm mechanism-alarm switch (20), second pressure alarm mechanism (21), pressure alarm value adjusting screw (22), upper seat and lower seat sealing washer (23), ground terminal (24), its characterized in that: the first pressure alarm mechanism (18) and the second pressure alarm mechanism (21) are fixed on the lower seat (1), a corrugated pipe welding cylinder (15) is arranged inside the first pressure alarm mechanism (18) and the second pressure alarm mechanism (21), the corrugated pipe (16) is welded inside the corrugated pipe welding cylinder (15), the lower end of the corrugated pipe welding cylinder (15) is turned inwards, a hole in the middle of the turned inwards edge is welded with the outer side of the opening end of the corrugated pipe (16) to form a sealing structure, the upper end of the corrugated pipe (16) is a blind end, the vacuum negative pressure protection support column (14) is fixed at the bottom of the hole in the lower seat (1) and is positioned in the center of the corrugated pipe (16), and a vacuum negative pressure protection adjusting screw (13) is screwed on the vacuum negative pressure protection support column (14);

positive pressure overvoltage protection piece (11) are installed in bellows welding section of thick bamboo (15) top, install alarm switch support (9) in positive pressure overvoltage protection piece (11) top, and alarm switch support (9) top is connected with alarm switch fixed and adjustment frame (8) thereof, first pressure alarm mechanism-alarm switch (19) and second pressure alarm mechanism-alarm switch (20) are respectively with electrical insulation piece (10) centre gripping, and electrical insulation piece (10) are fixed on alarm switch and adjustment frame (8) thereof with the fix with screw, pressure alarm value adjusting screw (22) are installed and are fixed at alarm switch and between adjustment frame (8) and alarm switch support (9), electrical protection cover (7) are installed on upper seat (2) of first pressure alarm mechanism (18) and second pressure alarm mechanism (21) top, have electrical outlet (3) installed on electrical protection cover (7) the plane of useful screw in the top of electrical protection cover (7), have ground terminal (24) on electrical outlet (3) outside electrical protection cover (7), have installed electrical outlet (4) top on electrical protection cover (4).

2. The novel pressure relay according to claim 1, characterized in that: the vacuum negative pressure protection support column (14) is fixed on the bottom of a hole in the lower seat (1) and is positioned in the center of the corrugated pipe (16), and a vacuum negative pressure protection adjusting screw (13) is screwed on the vacuum negative pressure protection support column (14).

3. The novel pressure relay according to claim 1, characterized in that: the upper seat (2) is fastened on the lower seat (1) by screws and sealed by a sealing rubber ring.