CN218444066U

CN218444066U - Multifunctional oil level indicator

Info

Publication number: CN218444066U
Application number: CN202220998124.3U
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: 2022-04-28
Filing date: 2022-04-28
Publication date: 2023-02-03
Anticipated expiration: 2032-04-28

Abstract

The utility model relates to an oil level gaugember technical field, and a multi-functional oil level gaugember is disclosed, including the float, the slip aluminum pipe, the oil level gaugember main part, the spacing jump ring of aluminum pipe stop collar and stop collar, oil level gaugember main part wall sets up indicating mechanism, indicating mechanism includes oil level gaugember window glass, oil level gaugember window glass-sealing washer, blue indication buoy, red indication buoy, the cylinder magnet dead lever, M4 hexagon nut, low oil level trigger contact separation blade, sealing washer between low oil level mechanism and oil level gaugember, low oil level mechanism, cylinder magnet and M5 hexagon nut, oil level gaugember and pressure release valve do not have electrical signal output and have output but the problem that the wrong report is alert appears easily to the out of position, the problem that needs to open two holes and come independent installation oil level gaugember and pressure release valve is solved to the solution, the utility model provides a safe and reliable, the multi-functional oil level gaugember of many problems is solved in the integration.

Description

Multifunctional oil level indicator

Technical Field

The utility model relates to an oil level gaugember technical field especially relates to a multi-functional oil level gaugember.

Background

At present, the inside oil level of traditional oily formula totally enclosed transformer box changes as the multi-functional oil level gaugember that electrical signal triggered also calls as the oil level gaugember, and the main points of its oil level protection are: when the inside of the transformer runs for a long time and lacks oil, the tank body leaks oil, or the inside of the transformer breaks down to generate gas to cause oil level to descend, half of a floater below an oil level gauge is soaked in the oil, and half floats above a boundary between an oil surface and a liquid surface, the floater drives a red and blue indicating buoy in a window of the oil level gauge to change along with the lifting of the oil surface, when the floater falls to a low oil level setting value, an alarming contact sends out a signal, so that the situation that switch contacts, winding coils, conducting rods in a sleeve and other parts needing insulating oil cooling and insulation on the transformer are exposed under the gas environment due to the fact that the oil level continues to descend is prevented, the normal running of the transformer is ensured, and the pressure release valve protection key points are as follows: when the pressure reaches the opening pressure of pressure release, the pressure release valve is quickly opened to release the pressure in the transformer and send an alarm signal to a background, so that the pressure-variable box can be protected from being damaged by pressure, and an electrical signal can be sent in time to inform maintenance personnel of timely handling the transformer fault;

in the prior art, the combination of mechanical and electronic detection is not tight enough, and the alarm is not precise and reliable enough.

To this end, we propose a multi-functional oil level gauge.

SUMMERY OF THE UTILITY MODEL

The utility model discloses solve the technical problem that above-mentioned prior art exists, provide a multi-functional oil level gaugember.

In order to realize the above-mentioned purpose, the utility model discloses a following technical scheme, a multi-functional oil level gaugember, including float, slip aluminum pipe, oil level gaugember main part, aluminum pipe stop collar and the spacing jump ring of stop collar, the aluminum pipe stop collar by the spacing jump ring card of stop collar inside the oil level gaugember main part, the float riveting at slip aluminum pipe lower extreme, slip aluminum pipe and aluminum pipe stop collar sliding connection, transformer case lid fixed surface is connected with the flange, oil level gaugember main part and flange fixed connection, oil level gaugember main part and flange are provided with the flange sealing washer of hookup, the inside of oil level gaugember main part is provided with oil level indicating mechanism, oil level indicating mechanism includes oil level gaugember window glass, oil level gaugember window glass-seal circle, blue indication buoy, red indication buoy, cylinder magnet dead lever, M4 hexagon nut, low trigger contact separation blade (11), low oil level gaugember and oil level gaugember sealing washer, low oil level gaugember, cylinder magnet and M5 hexagon nut, blue indication buoy installs in slip aluminum pipe upper end, red indication buoy pegs graft in blue indication buoy top, low oil level gaugember contact separation blade and cylinder magnet contact separation blade is installed on low oil level gaugember main part, low oil level gaugember contact separation blade, the lower surface of low magnet contact separation blade on low oil level gaugember mechanism, the oil level gaugember contact separation blade, the lower extreme is installed on the oil level gaugember contact separation blade, the cylinder magnet contact separation blade of low magnet contact mechanism, the cylinder magnet contact separation blade, the lower extreme is installed on the cylinder magnet contact mechanism, the cylinder magnet contact separation blade of low oil level gaugember.

Further, the low oil level mechanism comprises an R1/8 screw plug, a low oil level-reed pipe and an ultra-low oil level-reed pipe, the low oil level-reed pipe and the ultra-low oil level-reed pipe are installed in a hole in the low oil level mechanism, the upper portions of the installation holes of the low oil level-reed pipe and the ultra-low oil level-reed pipe are sealed through the R1/8 screw plug, and the ultra-low oil level-reed pipe is 10-15mm lower than the low oil level-reed pipe.

The low oil level mechanism further comprises a low oil level electrical junction box, the low oil level electrical junction box is installed on the side face of the low oil level mechanism, a low oil level-wiring terminal is installed in the low oil level electrical junction box, an external lead is fixed on the low oil level-wiring terminal through a compression screw, a lead is connected with the low oil level-reed pipe and the ultra-low oil level-reed pipe, a low oil level outlet box-fixing threaded sleeve is fixedly connected to the side wall of the low oil level electrical junction box, the lead is led out from an opening in the side face of the low oil level mechanism and penetrates through the low oil level outlet box-fixing threaded sleeve, a low oil level outlet box-sealing ring seal is arranged between the low oil level mechanism and the low oil level electrical junction box, and a low oil level outlet box upper cover-sealing ring seal is arranged between the low oil level electrical junction box and the low oil level outlet box-upper cover.

The low oil level gauge further comprises a pressure release valve mechanism, the pressure release valve mechanism is installed above the low oil level mechanism, a pressure release valve mechanism sealing ring is arranged at the end portion of the pressure release valve mechanism, internal threads of the pressure release valve mechanism are in threaded connection with the low oil level mechanism, an oil level inter-gauge sealing ring is arranged in a contact end face groove of the pressure release valve mechanism for sealing, a pressure release valve-side rubber ring and a pressure release valve-top rubber ring are installed in the pressure release valve mechanism, a pressure release valve membrane disc is installed above the top rubber ring, a pressure release valve-pull rod welded in advance is arranged in the center of the membrane disc, external threads are arranged at the lower end of the pull rod, a tower-shaped spring concentrically installed with the pull rod is arranged, the large end of the tower-shaped spring abuts against the inner end face of the pressure release valve, a spring pressing cover is arranged at the small end of the tower-shaped spring and presses the spring on the pull rod and is locked by an M hexagonal nut.

The pressure release valve mechanism further comprises a pressure release valve diaphragm disc, a mark rod, a pressure release valve-electric cover and a small red cap, wherein the pressure release valve-electric cover is arranged above the pressure release valve mechanism, the electric cover-upper stud is arranged above the pressure release valve-electric cover, three screws which can be locked in a groove on the excircle of the pressure release valve mechanism are arranged on the pressure release valve-electric cover, the direction of the pressure release valve-electric cover can be adjusted by 360 degrees, an alarm switch box is fixedly arranged inside the pressure release valve mechanism, the alarm switches are arranged in the alarm switch box and are arranged on the left side and the right side, the mark rod penetrates through the middle of the alarm switch box, the lower end of the mark rod is in contact with the upper surface of the pressure release valve diaphragm disc, the middle of the mark rod is in contact with alarm switch trigger points arranged on the left side and the right side through a thin and thick part, the small red cap is arranged at the upper end of the mark rod, and a pressure release valve-locking device which is screwed on the electric cover-upper stud is pressed at the upper end of the small red cap.

Furthermore, the pressure release valve outlet box is arranged on the side surface of the pressure release valve-electric cover, the Glan head is fixedly connected with the pressure release valve outlet box, an electric outlet is led out from the opening of the pressure release valve-electric cover, penetrates through the outlet box fixing screw plug and is connected to a pressure release valve-wiring terminal in the pressure release valve outlet box, the pressure release valve outlet box-sealing ring is sealed between the pressure release valve-electric cover and the pressure release valve outlet box, and the pressure release valve outlet box upper cover-sealing ring is sealed between the pressure release valve outlet box and the pressure release valve outlet box-upper cover.

Furthermore, a wiring terminal is arranged in the pressure release valve outlet box, a lead connected with the alarm switch is welded on the lower side of the wiring terminal, and a compression screw on the wiring terminal is used for crimping an external lead.

Advantageous effects

The utility model provides a multi-functional oil level gaugember. The method has the following beneficial effects:

(1) This multi-functional oil level gaugember, oil level gaugember and pressure release valve do not have electrical signal output and have output but the alert problem of wrong report appears easily in the protection not in place, solve the problem that need open two holes and come independent installation oil level gaugember and pressure release valve, the utility model provides a safe and reliable, the multi-functional oil level gaugember of multinomial problem is solved in the integration.

Drawings

The structures, the proportions, the sizes, and the like shown in the specification are only used for matching with the contents disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used for limiting the practical limitations of the present invention, so they have no technical essential significance.

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

FIG. 2 is a perspective view of the utility model;

fig. 3 is a sectional view of the utility model.

Illustration of the drawings: 1. a float; 2. sliding an aluminum tube; 3. an oil level gauge main body; 4. an aluminum pipe limiting sleeve; 5. oil level gauge window glass; 6. oil level gauge window glass-seal ring; 7. a blue indicating float; 8. red indicating float; 9. a cylindrical magnet fixing rod; 10. m4 hexagonal nut; 11. a low oil level triggers a contact catch; 12. A sealing ring between the low oil level mechanism and the oil level gauge; 13. a low oil level mechanism; 14. a cylindrical magnet; 15. m5 hexagonal nuts; 16. a spring gland; 17. a tower-shaped spring; 18. a pressure relief valve mechanism; 19. pressure relief valve-tie rod; 20. a pressure relief valve mechanism seal ring; 21. pressure relief valve-side rubber ring; 22. pressure relief valve-top rubber ring; 23. a pressure relief valve diaphragm disc; 24. a marker post; 25. pressure relief valve-electric enclosure; 26. a little red cap; 27. pressure relief valve-latching means; 28. electrical shield-upper stud; 29. an alarm switch box; 30. an alarm switch; 31. the pressure relief valve outlet box is a sealing ring; 32. the outlet box is fixed with a screw plug; 33. pressure relief valve outlet box-upper cover; 34. pressure relief valve-terminal block; 35. the pressure relief valve outlet box upper cover-sealing ring; 36. a pressure release valve outlet box; 37. a glan head; 38. r1/8 screw plug; 39. low oil level-reed pipe; 40. a low oil level outlet box-fixed threaded sleeve; 41. a low oil level outlet box-upper cover; 42. a low oil level-connection terminal; 43. the low oil level outlet box is covered with a sealing ring; 44. a low oil level outlet box; 45. a low oil level outlet box-seal ring; 46. connecting a flange sealing ring; 47. a coupling flange; 48. a transformer tank cover; 49. the limiting clamp spring is limited by the limiting sleeve; 50. ultra-low oil level-reed pipe.

Detailed Description

A multifunctional oil level indicator is disclosed, as shown in figures 1-3, and comprises a floater 1, a sliding aluminum pipe 2, an oil level indicator main body 3, an aluminum pipe limiting sleeve 4 and a limiting sleeve limiting snap spring 49, wherein the aluminum pipe limiting sleeve 4 is clamped inside the oil level indicator main body 3 by the limiting sleeve limiting snap spring 49, the floater 1 is riveted at the lower end of the sliding aluminum pipe 2, the sliding aluminum pipe 2 is connected with the aluminum pipe limiting sleeve 4 in a sliding manner, a connecting flange 47 is fixedly connected to the surface of a transformer box cover 48, the oil level indicator main body 3 is fixedly connected with the connecting flange 47, the oil level indicator main body 3 and the connecting flange 47 are provided with a connecting flange sealing ring 46, an oil level indicator mechanism is arranged inside the oil level indicator main body 3, and comprises an oil level indicator window glass 5, an oil level indicator window glass-sealing ring 6, a blue indicator float 7, a red indicator float 8, a cylindrical magnet fixing rod 9, an M4 hexagon nut 10, a low oil level trigger contact baffle plate 11, an inter-oil level sealing ring 12, a low oil level mechanism 13, a cylindrical magnet 14 and an M5 hexagon nut 15, the blue indicating buoy 7 is arranged at the upper end of the sliding aluminum pipe 2, the red indicating buoy 8 is inserted above the blue indicating buoy 7, the low oil level mechanism 13 is arranged above the oil level indicator main body 3, a rubber ring groove on the low oil level mechanism 13 is provided with a low oil level mechanism and an oil level inter-indicator sealing ring 12, a cylindrical magnet 14 is arranged on a cylindrical magnet fixing rod 9 and is inserted into a central hole of the low oil level mechanism 13, the magnet is upward, a low oil level triggering contact baffle plate 11 is fixed at the lower end of the cylindrical magnet fixing rod 9 by an M4 hexagon nut 10, the lower surface of the low oil level triggering contact baffle plate 11 is contacted with the upper surface of the red indicating buoy 8, the low oil level mechanism further comprises an R1/8 screw plug 38, a low oil level-dry reed pipe 39 and an ultra-low oil level-dry reed pipe 50, the low oil level-reed pipe 39 and the ultra-low oil level-reed pipe 50 are both installed in a hole in the low oil level mechanism 13, the upper parts of the installation holes of the low oil level-reed pipe 39 and the ultra-low oil level-reed pipe 50 are sealed by an R1/8 screw 38, wherein the ultra-low oil level-reed pipe 50 is lower than the low oil level-reed pipe 3910-15mm, the low oil level mechanism 13 further comprises a low oil level electrical junction box 44, the low oil level electrical junction box 44 is installed on the side surface of the low oil level mechanism 13, a low oil level-wiring terminal 42 is installed in the low oil level electrical junction box 44, an external lead is fixed on the low oil level-wiring terminal 42 by a compression screw, the lead is connected with the low oil level-reed pipe 39 and the ultra-low oil level-reed pipe 50, a low oil level outlet box-fixing screw sleeve 40 is fixedly connected to the side wall of the low oil level electrical junction box 44, the lead is led out from an opening on the side surface of the low oil level mechanism 13 and penetrates through the low oil level outlet box-fixing screw sleeve 40, a low oil level outlet box-sealing ring 45 is arranged between the low oil level mechanism 13 and the low oil level electrical junction box 44 for sealing, a low oil level outlet box upper cover-sealing ring 43 is arranged between the low oil level electrical junction box 44 and the low oil level outlet box-upper cover 41 for sealing, the low oil level mechanism 13 also comprises a pressure release valve mechanism 18, the pressure release valve mechanism 18 is arranged above the low oil level mechanism 13, the end part of the pressure release valve mechanism 18 is provided with a pressure release valve mechanism sealing ring 20, the internal thread of the pressure release valve mechanism 18 is in threaded connection with the low oil level mechanism 13, an oil level inter-gauge sealing ring 12 is arranged in a contact end surface groove of the pressure release valve mechanism 18 for sealing, and a pressure release valve-side rubber ring 21 and a pressure release valve-top rubber ring 22 are arranged in the pressure release valve mechanism 18, a pressure release valve membrane disc 23 is arranged above the rubber jacking ring, a pressure release valve-pull rod 19 welded in advance is arranged in the center of the membrane disc, the lower end of the pull rod is provided with external threads, a tower-shaped spring 17 concentrically arranged with the pull rod is arranged, the large end of the tower-shaped spring 17 is jacked at the inner side end surface of the pressure release valve, the small end of the tower-shaped spring 17 is provided with a spring gland 16 for pressing the spring on the pull rod and is locked on the pull rod by an M5 hexagon nut 15, the pressure release valve mechanism 18 also comprises the pressure release valve membrane disc 23, a mark rod 24, a pressure release valve-electric cover 25 and a small red cap 26, the pressure release valve-electric cover 25 is arranged above the pressure release valve mechanism 18, an electric cover-upper stud 28 is arranged above the pressure release valve-electric cover 25, wherein three screws are arranged on the pressure release valve-electric cover 25 and can be locked in a groove at the excircle of the pressure release valve mechanism 18, the direction of the pressure release valve-electric cover 25 can be adjusted by 360 degrees, an alarm switch box 29 is fixedly arranged in the pressure release valve mechanism 18, alarm switches 30 are arranged in the alarm switch box 29 and arranged on the left side and the right side, a mark rod 24 penetrates through the middle of the alarm switch box 29, the lower end of the mark rod 24 is contacted with the upper surface of a pressure release valve membrane disc 23, the middle of the mark rod 24 is contacted with a trigger point of the alarm switch 30 arranged on the left side and the right side through a thin and thick part, a small red cap 26 is arranged at the upper end of the mark rod 24, a pressure release valve-locking device 27 screwed on an electric cover-upper stud 28 is pressed at the upper end of the small red cap 26, a pressure release valve outlet box 36 is arranged on the side surface of the pressure release valve-electric cover 25, a gram head 37 is fixedly connected with the pressure release valve outlet box 36, and an electric outlet is led out from the opening of the pressure release valve-electric cover 25, the pressure relief valve outlet box is connected to a pressure relief valve-connecting terminal 34 in a pressure relief valve outlet box 36 after penetrating through an outlet box fixing screw plug 32, a pressure relief valve outlet box-sealing ring 31 is sealed between the pressure relief valve-electric cover 25 and the pressure relief valve outlet box 36, a pressure relief valve outlet box upper cover-sealing ring 35 is sealed between the pressure relief valve outlet box 36 and a pressure relief valve outlet box-upper cover 33, a connecting terminal 34 is installed in the pressure relief valve outlet box 36, a lead connected with an alarm switch is welded on the lower side of the connecting terminal 34, and a compression screw on the connecting terminal 34 is used for crimping an external lead.

The utility model discloses a theory of operation: the utility model discloses realize that the low oil level of oil surface in the accurate response transformer box is reported to the police, ultralow oil level is reported to the police and pressure relief valve list alarm output, pressure relief valve double alarm output. And the oil level gauge part of the product is provided with a 360-degree observation window, so that the oil level can be observed conveniently, all electrical mechanisms are provided with a plurality of seals to ensure that the electrical part of the pressure release valve has higher IP protection level, all electrical signal parts are metal shells, the electromagnetic compatibility and the anti-interference capability on electrical signals are higher, the running risk of a transformer can be reduced, and the management efficiency is improved.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. 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 multi-functional oil level gaugember, includes float (1), slip aluminum pipe (2), oil level gaugember main part (3), aluminum pipe stop collar (4) and stop collar spacing jump ring (49), aluminum pipe stop collar (4) are blocked inside oil level gaugember main part (3) by stop collar spacing jump ring (49), float (1) riveting at slip aluminum pipe (2) lower extreme, slip aluminum pipe (2) and aluminum pipe stop collar (4) sliding connection, transformer case lid (48) fixed surface is connected with coupling flange (47), oil level gaugember main part (3) and coupling flange (47) fixed connection, oil level gaugember main part (3) and coupling flange (47) are provided with coupling flange sealing washer (46), its characterized in that: the oil level indicator is characterized in that an oil level indicating mechanism is arranged inside the oil level indicator main body (3), the oil level indicating mechanism comprises an oil level indicator window glass (5), an oil level indicator window glass-sealing ring (6), a blue indicator buoy (7), a red indicator buoy (8), a cylindrical magnet fixing rod (9), an M4 hexagon nut (10), a low oil level trigger contact blocking piece (11), a low oil level mechanism and oil level inter-indicator sealing ring (12), a low oil level mechanism (13), a cylindrical magnet (14) and an M5 hexagon nut (15), the blue indicator buoy (7) is arranged at the upper end of a sliding aluminum pipe (2), the red indicator buoy (8) is inserted above the blue indicator buoy (7), the low oil level mechanism (13) is arranged above the oil level indicator main body (3), the low oil level mechanism and the oil level inter-indicator sealing ring (12) are arranged in a rubber ring groove in the low oil level mechanism (13), the cylindrical magnet (14) is arranged on the cylindrical magnet fixing rod (9), the cylindrical magnet fixing rod (9) is inserted into a central hole of the low oil level mechanism (13), the magnet is upward, the low oil level trigger contact blocking piece (11) is fixed at the lower end of the cylindrical magnet (9) through the M4 hexagon nut (10), and the upper surface of the red indicator buoy (8) contacts with the upper surface of the lower surface of the red indicator buoy (8).

2. The multifunctional oil level gauge according to claim 1, wherein: the low oil level mechanism (13) comprises an R1/8 screw plug (38), a low oil level-reed pipe (39) and an ultralow oil level-reed pipe (50), the low oil level-reed pipe (39) and the ultralow oil level-reed pipe (50) are installed in holes in the low oil level mechanism (13), the upper portions of the installation holes of the low oil level-reed pipe (39) and the ultralow oil level-reed pipe (50) are sealed through the R1/8 screw plug (38), and the ultralow oil level-reed pipe (50) is 10-15mm lower than the low oil level-reed pipe (39).

3. The multi-functional oil level gauge of claim 2, wherein: the low oil level mechanism (13) further comprises a low oil level electrical junction box (44), the low oil level electrical junction box (44) is installed on the side face of the low oil level mechanism (13), a low oil level-connection terminal (42) is installed in the low oil level electrical junction box (44), an external lead is fixed on the low oil level-connection terminal (42) through a compression screw, a lead is connected with the low oil level-dry reed pipe (39) and the ultra-low oil level-dry reed pipe (50), a low oil level outlet box-fixing screw sleeve (40) is fixedly connected to the side wall of the low oil level electrical junction box (44), the lead is led out from an opening in the side face of the low oil level mechanism (13) and penetrates through the low oil level outlet box-fixing screw sleeve (40), a low oil level outlet box-sealing ring (45) is arranged between the low oil level mechanism (13) and the low oil level electrical junction box (44) for sealing, and a low oil level outlet box-upper cover (41) is arranged between the low oil level electrical junction box (44) for sealing with an oil level outlet cover (43).

4. A multi-functional oil level gauge as defined in claim 3, wherein: the low oil level mechanism (13) further comprises a pressure release valve mechanism (18), the pressure release valve mechanism (18) is installed above the low oil level mechanism (13), a pressure release valve mechanism sealing ring (20) is arranged at the end portion of the pressure release valve mechanism (18), internal threads of the pressure release valve mechanism (18) are in threaded connection with the low oil level mechanism (13), an oil level inter-gauge sealing ring (12) is arranged in a contact end face groove of the pressure release valve mechanism (18) for sealing, a pressure release valve-side rubber ring (21) and a pressure release valve-top rubber ring (22) are installed in the pressure release valve mechanism (18), a pressure release valve membrane disc (23) is installed above the top rubber ring, a pressure release valve-pull rod (19) welded in advance is arranged in the center of the membrane disc, external threads are arranged at the lower end of the pull rod, a tower-shaped spring (17) installed concentrically with the pull rod is arranged, the large end of the tower-shaped spring (17) props against the inner end face of the pressure release valve, and a spring pressing cover (16) presses the spring pull rod on the pull rod and a hexagonal nut (15) is locked by an M5).

5. The multi-functional oil level indicator of claim 4, wherein: the pressure release valve mechanism (18) further comprises a pressure release valve membrane disc (23), a mark rod (24), a pressure release valve-electric cover (25) and a small red cap (26), the pressure release valve-electric cover (25) is installed above the pressure release valve mechanism (18), an electric cover-upper stud (28) is installed above the pressure release valve-electric cover (25), three screws are installed on the pressure release valve-electric cover (25) and can be locked in a groove in the excircle of the pressure release valve mechanism (18), the pressure release valve-electric cover (25) can be adjusted in direction by 360 degrees, an alarm switch box (29) is fixedly installed inside the pressure release valve mechanism (18), the alarm switch (30) is installed in the alarm switch box (29) and arranged on the left side and the right side, the mark rod (24) penetrates through the middle of the alarm switch box (29), the lower end of the mark rod (24) is in contact with the upper surface of the pressure release valve membrane disc (23), the middle of the mark rod (24) is in contact with the upper end of the small red cap (26) which is installed on the small red cap (26), and the alarm switch box (30) is in contact with the upper end of the small red cap (26).

6. The multi-functional oil level indicator of claim 5, wherein: a pressure release valve outlet box (36) is installed on the side face of the pressure release valve-electric hood (25), a Glan head (37) is fixedly connected to the wall face of the pressure release valve outlet box (36), an electric outlet is led out from an opening of the pressure release valve-electric hood (25), the electric outlet penetrates through an outlet box fixing screw plug (32) and is connected to a pressure release valve-wiring terminal (34) in the pressure release valve outlet box (36), a pressure release valve outlet box-sealing ring (31) is arranged between the pressure release valve-electric hood (25) and the pressure release valve outlet box (36) for sealing, and a pressure release valve outlet box upper cover-sealing ring (35) is arranged between the pressure release valve outlet box (36) and the pressure release valve outlet box-upper cover (33) for sealing.

7. The multi-functional oil level indicator of claim 6, wherein: a wiring terminal (34) is arranged in the pressure release valve outlet box (36), wherein a lead connected with the alarm switch is welded on the lower side of the wiring terminal (34), and a compression screw on the wiring terminal (34) is used for crimping an external lead.