Expansion type inflation insulation ring main unit

Abstract

The utility model discloses an expansion type inflation insulation ring main unit, which comprises a main unit body and an auxiliary unit body, at least one end of the upper part of the front side of the main unit body is provided with a rectangular recess, the upper part of the front side of the auxiliary unit body is provided with a rectangular convex shell capable of extending into the rectangular recess, and the inner cavity of the rectangular convex shell is communicated with the cavity of the auxiliary unit body. The rear side wall of the rectangular recess is provided with an insertion hole communicated with the cavity of the main cabinet body, the rear side wall of the rectangular convex shell is provided with an insertion pipe which can be inserted into the insertion hole in a matched mode, the insertion pipe is communicated with the inner cavity of the rectangular convex shell, and the inner end of the insertion pipe is provided with a one-way valve which circulates from the auxiliary cabinet body to the main cabinet body. The back face of the main cabinet body is provided with a plurality of negative pressure fans exhausting air outwards and an inflation pump communicated with a cavity of the main cabinet body, and the back face of the auxiliary cabinet body is provided with an inflation pump communicated with a cavity of the auxiliary cabinet body. According to the expansion type inflatable insulation ring main unit, air in the cabinet can be pumped out, specified insulation gas is filled, the insulation effect is improved, and the expansion type inflatable insulation ring main unit is provided with a splicing expansion structure.

Description

TECHNICAL FIELD

[0001] The utility model relates to a ring main unit, specifically, relates to an extended inflatable insulation ring main unit. BACKGROUND

[0002] The ring main unit is a kind of high-voltage switchgear widely used in power system, mainly used for distribution and monitoring. In order to make the electrical components in the ring main unit have reliable use performance, the cavity environment inside it needs to be in an insulating state. For example, in some environments with a certain humidity, the air inside needs to be extracted and filled with insulating gas, such as nitrogen.

[0003] Publication No. CN216794467U discloses an environment-friendly gas-insulated ring main unit, which comprises a gas-insulated ring main unit body. The gas-insulated ring main unit body is a hollow box. A rainproof device is arranged on the upper surface of the gas-insulated ring main unit body. A noise reduction device is arranged inside the gas-insulated ring main unit body. A cabinet door is hingedly connected to one side of the gas-insulated ring main unit body. Two air outlets are formed in one side of the gas-insulated ring main unit body. A negative pressure fan is arranged in each air outlet.

[0004] The environment-friendly gas-insulated ring main unit is a single structure, and does not have the expansion performance of the expansion auxiliary cabinet. When the internal space of the main cabinet is insufficient, only a larger cabinet can be replaced, and the original electrical components need to be reassembled, which is a huge amount of work and requires a long construction period. SUMMARY

[0005] The utility model aims to provide an extended inflatable insulation ring main unit, which can extract the air in the cabinet and fill it with specified insulating gas, improve the insulation effect, and has a splicing expansion structure, which can expand the auxiliary cabinet and increase the electrical component installation space.

[0006] In order to achieve the above-mentioned purpose, the utility model provides an extended inflatable insulation ring main unit, which comprises a main cabinet and an auxiliary cabinet. At least one end of the upper part of the front side of the main cabinet is provided with a rectangular recess. The upper part of the front side of the auxiliary cabinet is provided with a rectangular convex shell that can extend into the rectangular recess. The inner cavity of the rectangular convex shell is in communication with the cavity of the auxiliary cabinet. The rear wall of the rectangular recess is provided with a plug-in hole that communicates with the cavity of the main cabinet. The rear wall of the rectangular convex shell is provided with a plug-in pipe that can be inserted into the plug-in hole. The plug-in pipe is in communication with the inner cavity of the rectangular convex shell. The inner end of the plug-in pipe is provided with a one-way valve that flows from the auxiliary cabinet to the main cabinet. The back of the main cabinet is provided with a plurality of negative pressure fans that discharge air outward, and a gas filling pump that communicates with the cavity of the main cabinet. The back of the auxiliary cabinet is provided with a gas filling pump that communicates with the cavity of the auxiliary cabinet.

[0007] Preferably, the outer side of the insertion hole is provided with an outer threaded pipe, the outer end of the outer threaded pipe is provided with an interface pipe with an outer diameter smaller than the outer threaded pipe, the rear side of the rectangular convex shell is provided with a positioning sleeve capable of being fitted on the interface pipe, and a sealing gasket is arranged in the annular gap between the positioning sleeve and the insertion pipe.

[0008] Preferably, the extension type inflatable insulation ring main unit further comprises a cover body, the front end of the cover body is provided with an inner threaded pipe threadedly matched with the outer threaded pipe, the rear end of the inner threaded pipe is provided with a light wall pipe capable of being fitted on the interface pipe, and the rear end of the cover body is provided with a regular hexagonal prism.

[0009] Preferably, a sealing gasket is arranged in the cover body and in sealing contact with the outer end surface of the interface pipe.

[0010] Preferably, a first connecting plate is arranged on the upper end of the main cabinet body near the left side or the right side of the rectangular recess, a second connecting plate is arranged on the upper end of the auxiliary cabinet body near one side of the first connecting plate, and the first connecting plate and the second connecting plate are connected through a plurality of bolts.

[0011] Preferably, a limiting baffle is arranged on the rear end of the main cabinet body near the left side or the right side of the rectangular recess, and a limiting angle groove that is embedded with the limiting baffle is arranged on the rear end of the auxiliary cabinet body near one side of the limiting baffle.

[0012] Preferably, a plurality of positioning holes are arranged on the limiting baffle in the vertical direction, and a plurality of positioning columns corresponding to the positioning holes are arranged on the limiting angle groove.

[0013] Preferably, four negative pressure fans are arranged on the back of the main cabinet body in a rectangular distribution.

[0014] According to the above technical scheme, the utility model provides an extension type inflatable insulation ring main unit, which comprises a main cabinet body and an auxiliary cabinet body, at least one end of the upper part of the front side of the main cabinet body is provided with a rectangular recess, the upper part of the front side of the auxiliary cabinet body is provided with a rectangular convex shell capable of extending into the rectangular recess, the inner cavity of the rectangular convex shell is communicated with the cavity of the auxiliary cabinet body, the rear side wall of the rectangular recess is provided with an insertion hole communicated with the cavity of the main cabinet body, the rear side wall of the rectangular convex shell is provided with an insertion pipe capable of being fitted into the insertion hole, the insertion pipe is communicated with the inner cavity of the rectangular convex shell, the inner end of the insertion pipe is provided with a one-way valve for flowing from the auxiliary cabinet body to the main cabinet body, the back of the main cabinet body is provided with a plurality of negative pressure fans for exhausting air outward, and the cavity of the main cabinet body is communicated with an inflation pump, and the back of the auxiliary cabinet body is provided with an inflation pump communicated with the cavity of the auxiliary cabinet body.

[0015] The working mode and beneficial effects of the extended gas-filled insulation ring net cabinet are as follows: when only the main cabinet body is used, the plug-in hole is closed, the negative pressure fan behind the main cabinet body is opened to make the gas in the main cabinet body exhaust to form a negative pressure environment, and then the gas-filled pump connected with the insulation gas source and arranged behind the main cabinet body is used to fill the insulation gas into the main cabinet body, so that the insulation performance of the environmental gas in the main cabinet body is improved, and the electrical components in the main cabinet body work in a relatively insulated environment, so that the accelerated damage or abnormal working condition of the electrical components due to the substandard insulation degree is avoided. In addition, when the auxiliary cabinet body is used, the plug-in pipe of the auxiliary cabinet body is inserted into the plug-in hole, so that the cavity of the main cabinet body and the cavity of the auxiliary cabinet body are communicated through the one-way valve, the negative pressure fan is shared by the main cabinet body and the auxiliary cabinet body, and after the negative pressure fan is opened, the air in the auxiliary cabinet body flows into the main cabinet body through the one-way valve and is then exhausted, so that a negative pressure environment is formed in the auxiliary cabinet body, and then the gas-filled pump connected with the insulation gas source and arranged behind the auxiliary cabinet body is used to fill the insulation gas into the auxiliary cabinet body, so that the environmental insulation effect is achieved in the auxiliary cabinet body. The extended gas-filled insulation ring net cabinet not only has the function of being spliced and expanded, but also can share the negative pressure fan on the main cabinet body by the expanded auxiliary cabinet body.

[0016] Other features and advantages of the present application will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0017] The accompanying drawings are included to provide a further understanding of the present application, and constitute a part of the specification, and are used together with the following specific embodiments to explain the present application, but do not constitute a limitation on the present application. In the drawings:

[0018] Figure 1 is a structure schematic view of a preferred embodiment of the main cabinet body connected with an auxiliary cabinet body;

[0019] Figure 2 is a structure schematic view of the main cabinet body of Figure 1 ;

[0020] Figure 3 is an A-A sectional structure schematic view of Figure 2 ;

[0021] Figure 4 is a local enlarged structure schematic view of the B area in Figure 3 ;

[0022] Figure 5 is a local enlarged structure schematic view of the C area in Figure 3 ;

[0023] Figure 6 is a structure schematic view of the reverse side of Figure 1 ;

[0024] Figure 7is a schematic diagram of the overall structure of a preferred embodiment of the auxiliary cabinet body;

[0025] Figure 8 is Figure 7 is a schematic diagram of the local enlarged structure of the D area in the middle.

[0026] Explanation of reference signs

[0027] 1-main cabinet body; 2-auxiliary cabinet body; 3-rectangular recess; 4-cover body; 5-regular hexagonal prism; 6-rectangular convex shell; 7-first connecting plate; 8-second connecting plate; 9-bolt; 10-limiting baffle; 11-positioning hole; 12-first sealed cabinet door; 13-second sealed cabinet door; 14-negative pressure fan; 15-external threaded pipe; 16-connection pipe; 17-internal threaded pipe; 18-sealing gasket; 19-internal cavity; 20-positioning sleeve; 21-sealing washer; 22-plug-in pipe; 23-one-way valve; 24-positioning column; 25-limiting angular groove; 26-air inflation pump. DETAILED DESCRIPTION

[0028] The specific embodiments described hereinbelow with reference to the drawings should be considered for the purpose of illustration and explanation only, and should not be considered as limiting the present application.

[0029] In the present application, unless otherwise stated, the orientation words such as "up and down, left and right, front and back, inside and outside" contained in the terms only represent the orientation of the terms in the normal use state or the common name understood by the person skilled in the art, and should not be considered as a limitation of the terms.

[0030] Referring to Figures 1-8 The extended air inflation ring network cabinet shown in the figure comprises a main cabinet body 1 and an auxiliary cabinet body 2, at least one end of the upper part of the front side of the main cabinet body 1 is provided with a rectangular recess 3, the upper part of the front side of the auxiliary cabinet body 2 is provided with a rectangular convex shell 6 capable of extending into the rectangular recess 3, the internal cavity 19 of the rectangular convex shell 6 is in communication with the cavity of the auxiliary cabinet body 2, the rear wall of the rectangular recess 3 is provided with a plug-in hole in communication with the cavity of the main cabinet body 1, the rear wall of the rectangular convex shell 6 is provided with a plug-in pipe 22 capable of fitting into the plug-in hole, the plug-in pipe 22 is in communication with the internal cavity 19 of the rectangular convex shell 6, the inner end of the plug-in pipe 22 is provided with a one-way valve 23 for circulation from the auxiliary cabinet body 2 to the main cabinet body 1, the back of the main cabinet body 1 is provided with a plurality of negative pressure fans for outward air exhaust, and an air inflation pump 26 in communication with the cavity of the main cabinet body 1, the back of the auxiliary cabinet body 2 is provided with an air inflation pump 26 in communication with the cavity of the auxiliary cabinet body 2.

[0031] By implementing the technical solution, when only the main cabinet 1 is used, the plug-in hole is closed, and the negative pressure fan behind the main cabinet 1 is opened to exhaust the gas in the main cabinet 1 to form a negative pressure environment, and then the inflation pump 26 connected to the insulating gas source and arranged behind the main cabinet 1 is used to inflate insulating gas into the main cabinet 1, so as to increase the insulation performance of the environmental gas in the main cabinet 1, and make the electrical components in the main cabinet 1 work in a relatively insulated environment, thereby avoiding the accelerated damage or abnormal working condition of the electrical components due to the substandard insulation. In addition, when the auxiliary cabinet 2 is used, the plug-in pipe 22 of the auxiliary cabinet 2 is inserted into the plug-in hole, so that the cavity of the main cabinet 1 and the cavity of the auxiliary cabinet 2 are communicated through the one-way valve 23, and the negative pressure fan is shared by the main cabinet 1 and the auxiliary cabinet 2. After the negative pressure fan is turned on, the air in the auxiliary cabinet 2 flows into the main cabinet 1 through the one-way valve 23 and is then exhausted, and a negative pressure environment is thus formed in the auxiliary cabinet 2. Then, the inflation pump 26 connected to the insulating gas source and arranged behind the auxiliary cabinet 2 is used to inflate insulating gas into the auxiliary cabinet 2, so that the environmental insulation effect is achieved in the auxiliary cabinet 2. The extended inflation insulated ring main unit not only has the function of being spliced and expanded, but also shares the negative pressure fan of the main cabinet 1 by the expanded auxiliary cabinet 2. The insulating gas can be nitrogen.

[0032] The front side of the main cabinet 1 is provided with a first opening, one side of the first opening is connected with a first sealing cabinet door 12 through a hinge, and the other side is provided with a sealing door lock. The first sealing cabinet door 12 can close the first opening after being closed and locked. The front side of the auxiliary cabinet 2 is provided with a second opening, one side of the second opening is connected with a second sealing cabinet door 13 through a hinge, and the other side is also provided with a sealing door lock. The second sealing cabinet door 13 can close the second opening after being closed and locked.

[0033] In the embodiment, the outer side of the plug-in hole is provided with an outer threaded pipe 15, the outer end of the outer threaded pipe 15 is provided with an interface pipe 16 with an outer diameter smaller than that of the outer threaded pipe 15, the rear side of the rectangular convex shell 6 is provided with a positioning sleeve 20 capable of being fitted on the interface pipe 16, and a sealing gasket 21 is arranged in the annular gap between the positioning sleeve 20 and the plug-in pipe 22. By arranging the positioning sleeve 20, the outer end of the interface pipe 16 can be accurately sealed and extruded on the sealing gasket 21 after the plug-in pipe 22 is inserted into the plug-in hole, thereby improving the sealing effect.

[0034] In the embodiment, in order to further provide a structure capable of closing the plug-in hole, the extended inflation insulated ring main unit further comprises a cover body 4, the front end of the cover body 4 is provided with an inner threaded pipe 17 threadedly matched with the outer threaded pipe 15, the rear end of the inner threaded pipe 17 is provided with a light wall pipe capable of being fitted on the interface pipe 16, and the rear end of the cover body 4 is provided with a regular hexagonal prism 5. By screwing the cover body 4 on the outer threaded pipe 15, the light wall pipe and the interface pipe 16 are in contact and cooperation, thereby closing the plug-in hole.

[0035] In this embodiment, in order to further improve the sealing between the cover 4 and the interface pipe 16, a sealing gasket 18 is arranged in the cover 4, which is in sealing contact with the outer end surface of the interface pipe 16. When the cover 4 is screwed into place, the interface pipe 16 is in extrusion contact with the sealing gasket 18 to achieve sealing.

[0036] In this embodiment, a first connecting plate 7 is arranged on the upper end of the main cabinet 1 near the left side or the right side of the rectangular recess 3, a second connecting plate 8 is arranged on the upper end of the auxiliary cabinet 2 near one side of the first connecting plate 7, and the first connecting plate 7 and the second connecting plate 8 are connected by a plurality of bolts 9. Through such arrangement, the connection stability between the main cabinet 1 and the auxiliary cabinet 2 is further increased.

[0037] In this embodiment, a limiting baffle 10 is arranged on the rear end of the main cabinet 1 near the left side or the right side of the rectangular recess 3, and a limiting angle groove 25 is arranged on the rear end of the auxiliary cabinet 2 near one side of the limiting baffle 10, which is embedded with the limiting baffle 10. Through the cooperation of the limiting baffle 10 and the limiting angle groove 25, the rear end limiting effect is achieved when the auxiliary cabinet 2 is assembled.

[0038] In this embodiment, a plurality of positioning holes 11 are arranged on the limiting baffle 10 in the vertical direction, and a plurality of positioning columns 24 corresponding to the positioning holes 11 are arranged on the limiting angle groove 25. The insertion positioning between the positioning column 24 and the positioning hole 11 further improves the connection stability between the main cabinet 1 and the auxiliary cabinet 2.

[0039] In this embodiment, four negative pressure fans are arranged in a rectangular distribution on the back of the main cabinet 1. Of course, more negative pressure fans can also be arranged, and the corresponding number of negative pressure fans can be selected according to the number of assembled auxiliary cabinets 2.

[0040] The preferred embodiments of the present application are described in detail above in combination with the drawings, but the present application is not limited to the specific details in the above embodiments, and various simple modifications can be made to the technical solutions of the present application within the technical concept of the present application, and these simple modifications all belong to the protection scope of the present application.

[0041] In addition, it should be noted that each specific technical feature described in the above specific embodiments can be combined in any appropriate manner without contradiction, and in order to avoid unnecessary repetition, the present application will not further describe various possible combination manners.

[0042] In addition, various different embodiments of the present application can be combined arbitrarily, as long as they do not violate the spirit of the present application, and should be considered as disclosed by the present application.

Claims

1. An extended type air insulated ring main unit, characterized in that, The extended inflation insulation ring network cabinet comprises a main cabinet body (1) and a secondary cabinet body (2), at least one end of the upper part of the front side of the main cabinet body (1) is provided with a rectangular recess (3), the upper part of the front side of the secondary cabinet body (2) is provided with a rectangular convex shell (6) capable of extending into the rectangular recess (3), the inner cavity (19) of the rectangular convex shell (6) is in communication with the cavity of the secondary cabinet body (2), the rear wall of the rectangular recess (3) is provided with a plug-in hole in communication with the cavity of the main cabinet body (1), the rear wall of the rectangular convex shell (6) is provided with a plug-in pipe (22) capable of fitting into the plug-in hole, the plug-in pipe (22) is in communication with the inner cavity (19) of the rectangular convex shell (6), the inner end of the plug-in pipe (22) is provided with a one-way valve (23) for flowing from the secondary cabinet body (2) to the main cabinet body (1), the back of the main cabinet body (1) is provided with a plurality of negative pressure fans for outward air exhaust, and an inflation pump (26) in communication with the cavity of the main cabinet body (1), the back of the secondary cabinet body (2) is provided with an inflation pump (26) in communication with the cavity of the secondary cabinet body (2).

2. The extended air insulated ring main unit according to claim 1, characterized in that, The outer side of the plug-in hole is provided with an external threaded pipe (15), the outer end of the external threaded pipe (15) is provided with an interface pipe (16) with a smaller outer diameter than the external threaded pipe (15), the rear side of the rectangular convex shell (6) is provided with a positioning sleeve (20) capable of fittingly sleeving the interface pipe (16), and a sealing gasket (21) is arranged in the annular gap between the positioning sleeve (20) and the plug-in pipe (22).

3. The extended air insulated ring main unit according to claim 2, characterized in that, The extended inflation insulation ring network cabinet further comprises a cover body (4), the front end of the cover body (4) is provided with an internal threaded pipe (17) threadedly matched with the external threaded pipe (15), the rear end of the internal threaded pipe (17) is provided with a light wall pipe capable of fittingly sleeving the interface pipe (16), and the rear end of the cover body (4) is provided with a regular hexagonal prism (5).

4. The extended air insulated ring main unit according to claim 3, characterized in that, A sealing gasket (18) is arranged in the cover body (4); The sealing gasket (18) is in sealing contact with the outer end surface of the interface pipe (16).

5. The extended air insulated ring main unit according to claim 1, characterized in that, A first connecting plate (7) is arranged on the left side or the right side of the upper end of the main cabinet body (1) close to the rectangular recess (3), a second connecting plate (8) is arranged on one side of the upper end of the secondary cabinet body (2) close to the first connecting plate (7), and the first connecting plate (7) and the second connecting plate (8) are connected through a plurality of bolts (9).

6. The extended air insulated ring main unit according to claim 5, characterized in that A limiting baffle (10) is arranged on the left side or the right side of the rear end of the main cabinet body (1) close to the rectangular recess (3), and a limiting angle groove (25) is arranged on one side of the rear end of the secondary cabinet body (2) close to the limiting baffle (10) and embedded with the limiting baffle (10).

7. The extended air insulated ring main unit according to claim 6, characterized in that A plurality of positioning holes (11) are arranged in the vertical direction on the limiting baffle (10), and a plurality of positioning columns (24) corresponding one-to-one with the positioning holes (11) are arranged on the limiting angle groove (25).

8. The extended air insulated ring main unit according to claim 1, characterized in that, Four negative pressure fans are arranged in a rectangular distribution on the back of the main cabinet body (1).

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