Shut-off valve with aluminum alloy body connection

Abstract

The utility model relates to a cut-off valve with an aluminum alloy valve body connection device, comprising a cut-off valve body, and steel live flanges separately arranged therefrom are respectively installed at both ends of the cut-off valve body; connecting ports are respectively integrally formed at both ends of the cut-off valve body, and the steel live flanges are respectively sleeved on the outer wall of the connecting port, and a shaft steel wire retaining ring capable of preventing the steel live flange from axially outwardly escaping from the connecting port is arranged between the outer wall of the connecting port and the inner wall of the steel live flange. The cut-off valve with an aluminum alloy valve body connection device is installed on the oil pipe of the transformer oil pillow, and can avoid the risk of the aluminum flange bolt hole position of the cut-off valve being easily broken when the aluminum flange of the cut-off valve is connected and tightened with the transformer oil pillow and the body pipeline flange due to the brittleness of the material of the cast aluminum hard connection flange, which makes the cut-off valve scrapped and causes the risk of breaking and leaking oil in the later stage of commissioning, causing the main transformer to trip and power outage, etc., causing serious losses. At the same time, the device has the characteristics of simple structure, convenient processing and installation, reliable connection, etc.

Description

Technical Field

[0001] The utility model relates to the technical field of transformer fire protection, in particular to a cut-off valve with an aluminum alloy valve body connection device. Background Art

[0002] At present, the cut-off valve including the connecting flanges at both ends are made of cast aluminum, such as Figure 1 As shown, the flange and the valve body are integrally cast, and the two ends are connected to the transformer oil pillow and the main pipe flange respectively, and the flange is made of steel. Because the site does not have the conditions for flange welding, the oil pillow and the main pipe flange have been welded when the transformer leaves the factory, and the stop valve is installed on site to connect the oil pillow with the body. However, in the actual installation process, due to the prefabricated transformer oil pillow, the hole position of the main pipe flange, the vertical deviation between the flange and the pipeline, and the uneven tightening of the flange bolts, the aluminum flange bolt hole position of the stop valve is easily broken when the stop valve is connected and tightened with the transformer oil pillow and the main pipe flange, making the stop valve scrapped, thereby delaying the construction period and increasing the cost. In the later stage of commissioning, there will also be the risk of breaking and leaking oil, causing the main transformer to trip and power outage, etc., causing serious losses. In order to prevent the above hidden dangers, we propose a stop valve with an aluminum alloy valve body connection device. Utility Model Content

[0003] The purpose of the utility model is to provide a shut-off valve with an aluminum alloy valve body connection device in view of the defects of the prior art, which has the advantages of reducing the risk of use, reliable connection and convenient installation, and solves the problem of breakage of the aluminum flange of the existing shut-off valve.

[0004] The utility model is realized through the following technical solutions:

[0005] A cut-off valve with an aluminum alloy valve body connection device comprises a cut-off valve body, and steel live flanges which are separately arranged at both ends of the cut-off valve body are respectively installed;

[0006] The two ends of the shut-off valve body are respectively integrally formed with connecting ports, the steel live flanges are respectively sleeved on the outer walls of the connecting ports, and a shaft wire retaining ring is provided between the outer wall of the connecting port and the inner wall of the steel live flange to prevent the steel live flange from axially escaping from the connecting port.

[0007] In order to limit the axial outward escape of the steel flange, the outer wall of the connection port is provided with an arc-shaped retaining ring groove for partial embedding of the inner side of the shaft wire retaining ring. One end of the inner wall of the steel live flange has an annular step extending inward, and the outer diameter of the shaft wire retaining ring is larger than the inner diameter of the annular step.

[0008] In order to ensure the sealing of the connection between the connecting port and the steel living flange, an annular groove is provided on the outer end face of the connecting port away from the valve body of the shut-off valve, and an oil-resistant sealing ring is sleeved in the annular groove. The outer wall of the oil-resistant sealing ring abuts against the inner wall of the shaft wire retaining ring.

[0009] In order to facilitate the connection between the steel live flange and the pipeline flange, a plurality of bolt holes are provided on the steel live flange.

[0010] In order to avoid the problem of easy breakage of cast aluminum flanges, the steel flange of the utility model is made of steel, which improves the connection strength. In order to achieve alignment of the bolt holes of the steel flange and the pipeline flange, the steel flange of the utility model is a movable flange, which can rotate 360° on the axis to compensate for the bolt hole positions of the prefabricated pipeline flange. In order to achieve parallel fitting of the steel flange and the pipeline flange, the steel flange of the utility model is a movable flange, which can be slightly deviated to compensate for the vertical deviation between the pipeline flange and the pipeline.

[0011] The beneficial effects of the utility model are as follows: the shut-off valve with the aluminum alloy valve body connection device is installed on the oil pipe of the transformer oil pillow, which can avoid the risk of the bolt hole position of the aluminum flange of the shut-off valve being easily broken when the aluminum flange of the shut-off valve is connected and tightened with the transformer oil pillow and the main pipe flange due to the brittleness of the material of the cast aluminum hard connection flange, resulting in the risk of the shut-off valve being scrapped and the risk of breaking and leaking oil in the later period of operation, causing the main transformer to trip and power outage, etc., causing serious losses. At the same time, the device has the characteristics of simple structure, easy processing and installation, reliable connection, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a one-piece cast cut-off valve in the prior art;

[0013] Figure 2 It is a three-dimensional structural schematic diagram of a cut-off valve with an aluminum alloy valve body connection device of the utility model;

[0014] Figure 3 It is an exploded view of the cut-off valve with an aluminum alloy valve body connection device of the utility model;

[0015] Figure 4 It is a cross-sectional view of a cut-off valve with an aluminum alloy valve body connection device of the utility model;

[0016] Figure 5 This is a field application installation diagram of a cut-off valve with an aluminum alloy valve body connection device of the utility model. DETAILED DESCRIPTION

[0017] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more specific definition of the protection scope of the present invention. The directional terms mentioned in the present invention, such as "up", "down", "front", "back", "left", "right", "top", "bottom", etc., are only for reference to the directions of the attached drawings. Therefore, the directional terms used are used to illustrate and understand the present invention, rather than to limit the present invention.

[0018] like Figure 2-4 A stop valve with an aluminum alloy valve body connection device shown in the figure comprises a stop valve body 1, and steel live flanges 2 which are separately arranged at both ends of the stop valve body 1 are respectively installed, and the steel live flanges 2 can rotate 360 ​​degrees about the axis;

[0019] Specifically, both ends of the shut-off valve body 1 are integrally formed with a columnar connection port 5, the steel live flange 2 is respectively sleeved on the outer wall of the connection port 5, the steel live flange 2 is disc-shaped, and a plurality of bolt holes 9 are opened on the steel live flange 2, the outer wall of the connection port 5 is provided with a circle of arc-shaped retaining ring groove 6, a shaft steel wire retaining ring 4 is sleeved in the arc-shaped retaining ring groove 6, and the outer ring of the shaft steel wire retaining ring 4 is exposed outside the arc-shaped retaining ring groove 6, and one end of the inner wall of the steel live flange 2 has an annular step 7 extending inwardly, so The outer diameter of the shaft steel wire retaining ring 6 is larger than the inner diameter of the annular step 7. The annular step 7 is located at the rear side of the shaft steel wire retaining ring 4, which can prevent the steel living flange 2 from axially escaping from the connecting port 5. In addition, an annular groove 8 is provided on the outer end face of the connecting port 5 away from the valve body 1 of the shut-off valve. An oil-resistant sealing ring 3 is sleeved in the annular groove 8. The outer wall of the oil-resistant sealing ring 3 abuts against the inner wall of the shaft steel wire retaining ring 4. The oil-resistant sealing ring 3 can ensure the sealing of the connection between the connecting port 5 and the steel living flange 2.

[0020] When the cut-off valve with the aluminum alloy valve body connection device is used, Figure 5 As shown, the steel live flanges at both ends of the shut-off valve A with an aluminum alloy valve body connection device are respectively connected to the flange of the main body oil pipe B and the flange of the oil pillow oil pipe C by bolts. Compared with the shut-off valve formed by integral casting, if the bolt hole positions are not aligned, the steel live flange can be axially rotated without rotating the entire shut-off valve, which can avoid the risk of easy breakage of the bolt hole position of the shut-off valve aluminum flange when the shut-off valve is connected and tightened with the transformer oil pillow and the main body pipeline flange due to the brittleness of the cast aluminum hard connection flange, resulting in the risk of the shut-off valve being scrapped and the risk of breaking and leaking oil in the later period of commissioning, causing the main transformer to trip and power outage, etc., causing serious losses. At the same time, the device has the characteristics of simple structure, easy processing and installation, reliable connection, etc.

[0021] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model.

Claims

1. A stop valve with an aluminum alloy valve body connection device, comprising a stop valve body, characterized in that: The two ends of the shut-off valve body are respectively provided with steel live flanges which are separately arranged therefrom; The two ends of the shut-off valve body are respectively integrally formed with connecting ports, the steel live flanges are respectively sleeved on the outer walls of the connecting ports, and a shaft wire retaining ring is provided between the outer wall of the connecting port and the inner wall of the steel live flange to prevent the steel live flange from axially escaping from the connecting port.

2. The cut-off valve with an aluminum alloy valve body connection device according to claim 1, characterized in that: The outer wall of the connection port is provided with an arc-shaped retaining ring groove for partially embedding the inner side of the shaft wire retaining ring. One end of the inner wall of the steel living flange has an annular step extending inwardly. The outer diameter of the shaft wire retaining ring is larger than the inner diameter of the annular step.

3. The cut-off valve with an aluminum alloy valve body connection device according to claim 2, characterized in that: The outer end surface of the connecting port away from the shut-off valve body is provided with an annular embedding groove, an oil-resistant sealing ring is sleeved in the annular embedding groove, and the outer wall of the oil-resistant sealing ring abuts against the inner wall of the shaft wire retaining ring.

4. The cut-off valve with an aluminum alloy valve body connection device according to claim 1 or 2, characterized in that: The steel living flange is provided with a plurality of bolt holes.

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