A rain cover structure for a top-thread fixed pressure release valve

Abstract

The utility model relates to a top-thread fixed pressure release valve rain cover structure, including a cover plate, a cover body, a guard plate, bolts, nuts, a sealing plate and a limit plate. The cover plate is welded to the upper end of the cover body, and notches for entering and exiting cables are respectively arranged on the two side walls of the cover body. Guard plates are welded at the outer edges of the notches, and a sealing plate is arranged on the other end face of the guard plate. Nuts are arranged on the outer side of the guard plate, and the bolts are screwed into the nuts until the end of the bolts presses against the pressure release valve. A limit plate is arranged on the upper part of the cover body, and the pressure release valve is fixedly connected to the oil tank cover. The rain cover is horizontally and firmly placed on the pressure release valve through the limit plate. The rain cover has a simple operation process, is firmly fixed, has a good rainproof effect, is easy to disassemble after installation, has a small size, avoids interference with components around the pressure release valve, effectively reduces the production cost, and thus improves work efficiency.

Description

Technical Field

[0001] The utility model belongs to the technical field of transformer manufacturing, in particular to a top-thread fixed type pressure release valve rain cover structure. Background Art

[0002] The pressure relief valve is a protective device used in oil-immersed transformers, usually installed on the oil tank cover of the transformer. When the pressure inside the transformer tank rises sharply due to a fault, and its pressure reaches the opening pressure value set by the pressure relief valve, the contact of the pressure relief valve will act to connect the specified control circuit, and promptly send out a trip signal and open quickly to quickly reduce the pressure in the tank; when the pressure drops to its closing pressure value, the pressure relief valve can close automatically to keep the positive pressure in the tank forever. Transformers installed outdoors need to use rain covers to protect the pressure relief valve to prevent rain from affecting the display accuracy and service life of the pressure relief valve.

[0003] Currently, there are two main common structures of rain cover for pressure relief valves. One is to weld a base plate on the transformer box cover, and then connect the rain cover to the base plate with bolts. This fixing measure is not reliable and has poor rain protection effect. The other is to fix the pressure relief valve with its own flange screw holes. The size of the rain cover in this structure is relatively large, and it is easy to interfere with the components around the pressure relief valve. At the same time, the rain cover is not easy to disassemble after installation, which increases the difficulty of the later maintenance work of the pressure relief valve. Utility Model Content

[0004] In order to further improve the rainproof effect of the pressure relief valve rain cover and facilitate later disassembly and maintenance, a top-screw fixed pressure relief valve rain cover is now provided, which has the characteristics of small size, firm fixation, and easy disassembly and maintenance.

[0005] The utility model is realized by the following technical solutions:

[0006] A top-thread fixed pressure relief valve rain cover structure comprises a cover plate, a cover body, a guard plate, bolts, nuts, a sealing plate and a limit plate. The cover plate is welded to the upper end of the cover body. Notches for entering and exiting cables are respectively arranged on both side walls of the cover body. Guard plates are welded at the outer edges of the notches. A sealing plate is arranged on the other end face of the guard plate. Nuts are arranged on the outer side of the guard plate. The bolts are screwed into the nuts until the end of the bolts presses against the pressure relief valve. A limit plate is arranged on the upper part of the cover body. The pressure relief valve is fixedly connected to the fuel tank cover. The rain cover is horizontally fixed to the pressure relief valve through the limit plate.

[0007] Furthermore, the cover plate, the housing, the guard plate, the sealing plate and the limit plate are all made of stainless steel plates.

[0008] Furthermore, the thickness of the cover plate, the cover body, the guard plate, the sealing plate and the limit plate are all 1 mm.

[0009] Furthermore, the cover body, the guard plate and the limit plate are all formed in one piece by bending.

[0010] Furthermore, the upper end of the notch is a semicircular arc, and the lower end is a rectangle.

[0011] Furthermore, the specifications of the bolts and nuts are M6, and the quantity is 4 respectively.

[0012] Furthermore, the bolts and nuts are made of stainless steel.

[0013] Furthermore, the guard plate is welded to the outside of the cable inlet and outlet, and its cross-sectional shape corresponds to the notch.

[0014] Furthermore, the cover body is in the shape of a round cap.

[0015] Furthermore, the sealing plate is provided with a notch according to the size of the lead wire during assembly.

[0016] Compared with the prior art, the utility model has the following beneficial technical effects:

[0017] The utility model discloses a rainproof cover structure for a pressure relief valve, wherein a cover plate is welded to the upper end of a cover body, notches for cable entry and exit are arranged on both sides of the cover body, guard plates are welded at the outer edges of the notches, a sealing plate is arranged at the other end of the guard plate, and when assembling the sealing plate, the notches are matched according to the size of the lead-out line, circular holes are opened on the walls of both sides of the cover body, nuts are welded on the outer sides of the circular holes, bolts are screwed into the nuts from the outer side walls of the cover body until the ends are pressed against the pressure relief valve, a limiting plate is arranged above the cover body, the pressure relief valve is fixedly connected to the tank cover, and is horizontally and firmly placed on the pressure relief valve through the limiting plate, thereby effectively preventing rainwater from entering the pressure relief valve, thereby protecting the pressure relief valve in all directions.

[0018] Furthermore, the cover plate, cover body, guard plate, sealing plate and limit plate are all made of stainless steel plates to prevent the rain cover from being exposed to the air and oxidized and rusted.

[0019] Furthermore, the thickness of the cover plate, the housing, the guard plate, the sealing plate and the limit plate are all 1 mm, which is convenient for bending and forming, thus saving material and processing costs.

[0020] Furthermore, the cover body, the guard plate and the limit plate are all bent and formed in one piece, thereby ensuring the strength of the overall structure of the rain cover and preventing it from being deformed.

[0021] Furthermore, the upper end of the notch is a semicircular arc, and the lower end is a rectangle. The guard plate is welded to the outside of the cable inlet and outlet, and its cross-sectional shape corresponds to the notch, so as to facilitate the safe passage of the incoming and outgoing cables.

[0022] Furthermore, the specifications of the bolts and nuts are M6, and the number is 4 respectively, which ensures that the relative positions of the rain cover and the pressure relief valve during assembly remain unchanged.

[0023] Furthermore, the bolts and nuts are made of stainless steel to prevent the rain cover from being oxidized and rusted when exposed to the air.

[0024] Furthermore, the cover body is in the shape of a circular cap, which is convenient for assembly with the limit plate and the pressure relief valve, thereby effectively protecting the pressure relief valve and avoiding the possibility of the pressure relief valve being exposed to rain.

[0025] Furthermore, during assembly, the sealing plate is notched according to the size of the incoming and outgoing cables, thereby improving assembly accuracy, preventing rainwater from entering the sealing plate, and further protecting the pressure relief valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a front view of the rain cover of the utility model assembled on the pressure release valve;

[0027] Figure 2 It is a side view of the rain cover of the utility model assembled on the pressure release valve;

[0028] Figure 3 It is a top view of the rain cover structure of the pressure release valve of the utility model;

[0029] Figure 4 A schematic diagram of a cover plate of a rain cover structure of a pressure release valve of the utility model

[0030] Figure 5 It is a schematic diagram of the cover body of the rain cover structure of the pressure release valve of the utility model;

[0031] Figure 6 It is a schematic diagram of the limit plate of the rain cover structure of the pressure release valve of the utility model.

[0032] Among them, 1 is a cover plate, 2 is a cover body, 3 is a guard plate, 4 is a bolt, 5 is a nut, 6 is a sealing plate, 7 is a limit plate, 8 is a notch, and 9 is a pressure release valve. DETAILED DESCRIPTION

[0033] The utility model is further described in detail below with reference to the accompanying drawings:

[0034] A top-thread fixed pressure relief valve rain cover structure comprises a cover plate 1, a cover body 2, a guard plate 3, bolts 4, nuts 5, a sealing plate 6 and a limit plate 7. The cover plate 1 is welded to the upper end of the cover body 2. Notches 8 for entering and exiting cables are respectively provided on both side walls of the cover body 2. Guard plates 3 are welded at the outer edges of the notches 8. A sealing plate 6 is provided on the other end face of the guard plate 3. Nuts 5 are provided on the outer side of the guard plate 3. Bolts 4 are screwed into the nut 5 until the end of the bolt 4 presses against the pressure relief valve 9. A limit plate 7 is provided on the upper part of the cover body 2. The pressure relief valve 9 is fixedly connected to the tank cover. The rain cover is horizontally fixed to the pressure relief valve 9 through the limit plate 7.

[0035] Specifically, the cover plate 1 , the housing 2 , the guard plate 3 , the sealing plate 6 and the limiting plate 7 are all made of stainless steel plates.

[0036] More preferably, the thickness of the cover plate 1, the cover body 2, the protective plate 3, the sealing plate 6 and the limiting plate 7 are all 1 mm.

[0037] More preferably, the cover body 2, the guard plate 3 and the limit plate 7 are all bent and formed in one piece.

[0038] Specifically, the notch 8 has a semicircular arc at the upper end and a rectangular shape at the lower end.

[0039] Specifically, the specifications of the bolts 4 and nuts 5 are M6, and the number is 4 respectively.

[0040] More preferably, the bolt 4 and the nut 5 are both made of stainless steel.

[0041] More preferably, the guard plate 3 is welded to the outside of the cable inlet and outlet, and its cross-sectional shape corresponds to the notch 8 .

[0042] Specifically, the cover body 2 is in the shape of a round cap.

[0043] More preferably, the sealing plate 6 is provided with a notch according to the size of the lead wire during assembly.

[0044] like Figure 1-3 As shown, the pressure relief valve 9 is fixedly connected to the tank cover, and the cover plate 1 is welded on the upper end of the cover body 2. The cover body 2 is made of 1mm stainless steel sheet. The cover body 2 is a round cap-shaped body, and notches 8 are opened on both sides of the cover body 2 for the entry and exit of cables, that is, the cable inlet and outlet. A circular arc-shaped stainless steel guard plate 3 is welded at the outer edge of the notch 8, and a sealing plate 6 is arranged on the other end face of the guard plate 3 to prevent rainwater from entering the cover body 2 from the cable inlet and outlet. Two round holes are arranged on the two side walls of the guard plate 3, and stainless steel nuts 5 are arranged on the outside of the round holes. Stainless steel bolts 4 of corresponding sizes are installed at the stainless steel nuts 5, and the bolts 4 are screwed into the nuts 5 until the end is against the pressure relief valve 9. A limit plate 7 is arranged on the upper part of the cover body 2, so as to firmly fix the rain cover from all sides and the upper part.

Claims

1. A top screw fixed pressure release valve rain cover structure, characterized in that: The utility model comprises a cover plate (1), a cover body (2), a guard plate (3), a bolt (4), a nut (5), a sealing plate (6) and a limiting plate (7). The cover plate (1) is welded to the upper end of the cover body (2). The two side walls of the cover body (2) are respectively provided with notches (8) for entering and exiting cables. The outer edge of the notch (8) is welded with a guard plate (3). The other end surface of the guard plate (3) is provided with a sealing plate (6). A nut (5) is provided on the outer side of the guard plate (3). The bolt (4) is screwed into the nut (5) until the end of the bolt (4) is pressed against the pressure release valve (9). The limiting plate (7) is provided on the upper part of the cover body (2). The pressure release valve (9) is fixedly connected to the tank cover. The rain cover is horizontally fixed to the pressure release valve through the limiting plate (7).

2. The top-thread fixed pressure release valve rain cover structure according to claim 1 is characterized in that: The cover plate (1), the cover body (2), the guard plate (3), the sealing plate (6) and the limit plate (7) are all made of stainless steel plates.

3. The top-thread fixed pressure release valve rain cover structure according to claim 2 is characterized in that: The thickness of the cover plate (1), the cover body (2), the guard plate (3), the sealing plate (6) and the limiting plate (7) are all 1 mm.

4. The top-thread fixed pressure release valve rain cover structure according to claim 3, characterized in that: The cover body (2), the guard plate (3) and the limit plate (7) are all formed in one piece by bending.

5. The top-thread fixed pressure release valve rain cover structure according to claim 1, characterized in that: The upper end of the notch (8) is a semicircular arc, and the lower end is a rectangle.

6. The top-thread fixed pressure release valve rain cover structure according to claim 1, characterized in that: The specifications of the bolts (4) and nuts (5) are M6, and the number is 4 respectively.

7. The top-thread fixed pressure release valve rain cover structure according to claim 6, characterized in that: The bolts (4) and nuts (5) are both made of stainless steel.

8. The top-thread fixed pressure release valve rain cover structure according to claim 1, characterized in that: The guard plate (3) is welded to the outside of the cable inlet and outlet, and its cross-sectional shape corresponds to the notch (8).

9. The top-thread fixed pressure release valve rain cover structure according to claim 1, characterized in that: The cover body (2) is in the shape of a circular cap.

10. The top-thread fixed pressure release valve rain cover structure according to claim 1, characterized in that: The sealing plate (6) is provided with a notch according to the size of the lead wire during assembly.

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