Anti-explosion L-shaped ascending flanged base

Abstract

The invention provides an anti-explosion L-shaped ascending flanged base. The ascending flanged base comprises an L-shaped ascending flanged base body; the corner reinforcing mechanism is arranged at the corner connecting seam of the L-shaped ascending flanged base body, and the corner reinforcing mechanism is connected with the transverse base body and the vertical base body of the L-shaped ascending flanged base body; and one end of the wall surface reinforcing mechanism is connected with the vertical seat body of the L-shaped ascending flanged seat body, and the other end of the wall surface reinforcing mechanism is connected to a transformer oil tank wall connected with the L-shaped ascending flanged seat body. Through the corner reinforcing mechanisms at the corner connecting seams of the L-shaped ascending flanged base body and the wall surface reinforcing mechanisms between the vertical base body and the transformer oil tank wall, the structural strength of the anti-explosion L-shaped ascending flanged base is improved, the L-shaped ascending flanged base body is prevented from being excessively deformed and even damaged, meanwhile, sealing damage of the L-shaped ascending flanged base body is avoided, and the service life of the anti-explosion L-shaped ascending flanged base is prolonged. And the effect of protecting the anti-explosion L-shaped ascending flanged base is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power equipment, in particular to a kind of anti-explosion L type riser. BACKGROUND

[0002] Transformer is the core equipment of power grid, once transformer fails, it is easy to cause transformer oil tank explosion fire, not only damage transformer, but also damage adjacent transformer or other electrical equipment, cause serious damage to substation, affect the safe and stable operation of power grid.And riser is installed on the additional device of transformer oil tank, for installing transformer bushing, transformer and the like.

[0003] Transformer L type riser is the key component of power transformer, mainly plays a role in three aspects.In electrical connection, riser can provide adaptive installation space for the high voltage bushing of transformer, realize stable and reliable electrical connection between transformer winding lead and high voltage bushing by the aid of internal conducting rod, guarantee the smooth transmission of electric energy.In insulation protection, it optimizes electric field distribution through reasonable insulation design, reduces the risk of partial discharge, prevents insulation breakdown, greatly improves the insulation reliability of transformer operation.In operation and maintenance link, riser can also install current transformer on top for measurement, protection and metering, and due to its unique L type structure, compared with traditional riser, it is more convenient for operation and maintenance personnel to check and maintain internal equipment, significantly reduces the operation and maintenance difficulty and improves work efficiency.

[0004] However, due to the existence of corner structure in L type riser, there are more sealing links, and the sealing difficulty is larger.In the process of transformer operation, affected by temperature change, vibration and other factors, L type riser is easy to be damaged, and the structure of sealing element may be deformed and aged, leading to sealing failure.Once sealing failure, external moisture and impurities will invade the inside of riser, pollute insulating oil, reduce insulation performance, and further cause electrical fault. SUMMARY

[0005] In view of this, the present application provides an anti-explosion L type riser, to solve the problem that existing L type riser is easy to be deformed or even damaged in the process of transformer operation, and the sealing element at corner is easy to be deformed and aged, causing electrical fault.

[0006] The present application provides an anti-explosion L type riser, which comprises: an L type riser body; a corner reinforcing mechanism arranged at the corner connecting seam of the L type riser body, and the corner reinforcing mechanism is connected with the horizontal seat body and the vertical seat body of the L type riser body respectively; a wall surface reinforcing mechanism, one end of which is connected with the vertical seat body of the L type riser body, and the other end is used for being connected to the oil tank wall of the transformer connected with the L type riser body.

[0007] Further, the explosion-proof L-shaped elevated seat, the corner reinforcing mechanism comprises: at least two corner reinforcing plates; wherein, each of the corner reinforcing plates is arranged at the corner connecting seam of the L-shaped elevated seat body along the circumference of the L-shaped elevated seat body, and each of the corner reinforcing plates is connected with the horizontal seat body and the vertical seat body of the L-shaped elevated seat body respectively.

[0008] Further, the explosion-proof L-shaped elevated seat, the inner corner position and the outer corner position of the L-shaped elevated seat body are respectively provided with the corner reinforcing plate.

[0009] Further, the explosion-proof L-shaped elevated seat, the thickness of the corner reinforcing plate is greater than or equal to the wall thickness of the L-shaped elevated seat body.

[0010] Further, the explosion-proof L-shaped elevated seat, the vertical seat body is provided with an explosion-proof membrane for pressure relief after a large amount of high-temperature and high-pressure oil gas excitation pressure impact is formed due to transformer failure.

[0011] Further, the explosion-proof L-shaped elevated seat, the explosion-proof membrane comprises: a metal explosion-proof membrane connected with the vertical seat body in a detachable manner; and an explosion-proof membrane protective layer covering the metal explosion-proof membrane.

[0012] Further, the explosion-proof L-shaped elevated seat, the side wall of the vertical seat body is provided with an explosion-proof connecting hole, and an explosion-proof connecting cylinder is arranged on the side wall of the vertical seat body at the explosion-proof connecting hole, and the explosion-proof connecting cylinder is arranged at an angle with the vertical seat body; the end of the explosion-proof connecting cylinder away from the vertical seat body is provided with an explosion-proof connecting flange which is detachably connected with the explosion-proof membrane.

[0013] Further, the explosion-proof L-shaped elevated seat, the side wall of the vertical seat body is provided with a cover plate connecting cylinder, and a cover plate is detachably connected to the cover plate connecting cylinder, which is used to be opened for sampling or detection during maintenance.

[0014] Further, the explosion-proof L-shaped elevated seat, the cover plate is arranged close to the horizontal seat body and between the explosion-proof membrane provided on the vertical seat body and the horizontal seat body.

[0015] Further, the explosion-proof L-shaped elevated seat, the wall surface reinforcing mechanism is a wall surface reinforcing plate structure, one end of which is provided with an inner concave circular arc groove matched with the outer wall of the vertical seat body, for connecting to the outer wall of the vertical seat body.

[0016] The explosion-proof L-shaped riser provided by the application increases the structural strength of the explosion-proof L-shaped riser through the corner reinforcing mechanism at the corner connecting joint of the L-shaped riser body and the wall surface reinforcing mechanism between the vertical seat body and the transformer oil tank wall, avoids excessive deformation or even damage of the L-shaped riser body, avoids damage of the seal of the L-shaped riser body, plays a role in protecting the explosion-proof L-shaped riser, and effectively solves the problems that the existing L-shaped riser is easily deformed or even damaged and the corner seal is easily deformed and aged to cause electrical faults under the influence of factors such as temperature change and vibration during the operation of the transformer.

[0017] Further, the explosion-proof L-shaped riser is provided with an explosion-proof membrane on the L-shaped riser body. When a large amount of high-temperature and high-pressure oil gas excitation pressure impact is formed in the electric arc discharge moment of the transformer fault, the explosion-proof membrane can play a pressure relief role to avoid safety hazards. BRIEF DESCRIPTION OF DRAWINGS

[0018] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a description of the preferred embodiments and are not intended to limit the scope of the application. Moreover, the same reference numerals are used throughout the same figures. In the drawings:

[0019] Figure 1 A front view of the explosion-proof L-shaped riser provided by the embodiment of the application;

[0020] Figure 2 A structural schematic view of the explosion-proof L-shaped riser provided by the embodiment of the application;

[0021] Figure 3 Another directional structural schematic view of the explosion-proof L-shaped riser provided by the embodiment of the application;

[0022] Figure 4 Still another structural schematic view of the explosion-proof L-shaped riser provided by the embodiment of the application;

[0023] Figure 5 A structural schematic view of the telescopic rod structure provided by the embodiment of the application;

[0024] Explanation of reference numerals: 1, L-shaped riser body; 11, horizontal seat body; 12, vertical seat body; 121, explosion-proof connecting hole; 122, explosion-proof connecting cylinder; 123, explosion-proof connecting flange; 124, cover plate connecting hole; 125, cover plate connecting cylinder; 126, cover plate connecting flange; 2, corner reinforcing mechanism; 21, corner reinforcing plate; 3, wall surface reinforcing mechanism; 31, concave circular groove; 32, connecting plate; 33, connecting ring; 34, connecting rod; 341, fixed section; 342, sliding section; 343, clamping hole; 344, clamping piece; 4, explosion-proof membrane; 5, cover plate; 6, transformer oil tank wall. DETAILED DESCRIPTION

[0025] Exemplary embodiments of the present disclosure will be described in detail with reference to the drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it is understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that the present disclosure can be more thoroughly understood, and the scope of the present disclosure can be accurately conveyed to those skilled in the art. It should be noted that the embodiments in the present disclosure and the features in the embodiments can be combined with each other without conflict. The present disclosure will be described in detail below with reference to the drawings and in conjunction with the embodiments.

[0026] Reference Figures 1 to 3 , which shows the preferred structure of the explosion-proof L-shaped elevated seat provided by the embodiment of the present disclosure. The explosion-proof L-shaped elevated seat comprises an L-shaped elevated seat body 1, a corner reinforcing mechanism 2, a wall reinforcing mechanism 3, an explosion-proof membrane 4, and a cover plate 5; wherein,

[0027] The corner reinforcing mechanism 2 is arranged at the corner connecting seam of the L-shaped elevated seat body 1, and the corner reinforcing mechanism 2 is connected with the horizontal seat body 11 and the vertical seat body 12 of the L-shaped elevated seat body 1, respectively.

[0028] Specifically, the L-shaped elevated seat body 1 is in an L-shaped structure, which comprises a horizontal seat body 11 and a vertical seat body 12 connected and arranged vertically. The two ends (such as the left and right ends shown in the figure) of the horizontal seat body 11 are respectively connected with the transformer oil tank wall 6 and the bottom end of the vertical seat body 12. Figure 1 The corner connecting seam of the horizontal seat body 11 and the vertical seat body 12 is provided with the corner reinforcing mechanism 2, which is connected with the outer walls of the horizontal seat body 11 and the vertical seat body 12, respectively, for reinforcing the corners of the horizontal seat body 11 and the vertical seat body 12, increasing the structural strength, avoiding excessive deformation or even damage at the corners of the L-shaped elevated seat body 1, and avoiding damage to the sealing of the L-shaped elevated seat body 1. The wall thickness of the L-shaped elevated seat body 1 is greater than or equal to the wall thickness of the transformer oil tank wall 6, and in this embodiment, the wall thickness of the L-shaped elevated seat body 1 can be determined based on the wall thickness of the transformer oil tank wall 6, which can be 8-12 mm.

[0029] One end (such as the left end shown in the figure) of the wall reinforcing mechanism 3 is connected with the vertical seat body 12 of the L-shaped elevated seat body 1, and the other end (such as the right end shown in the figure) is used to be connected on the transformer oil tank wall 6 connected with the L-shaped elevated seat body 1. Figure 1 Figure 1

[0030] ​​Specifically, the wall reinforcement mechanism 3 is disposed between the vertical base 12 and the transformer tank wall 6, and is connected to both the vertical base 12 and the transformer tank wall 6 to reinforce the vertical base 12, preventing deformation such as swaying of the vertical base 12 relative to the horizontal base 11, increasing structural strength, and limiting the swaying of the vertical base 12 relative to the connection between the horizontal base 11 and the transformer tank wall 6. This reduces the resonance of the riser seat with earthquakes, prevents excessive deformation or even damage to the L-shaped riser seat body 1, and also prevents damage to the seal of the L-shaped riser seat body 1, thus protecting the explosion-proof L-shaped riser seat. There can be one or more wall reinforcement mechanisms 3; multiple wall reinforcement mechanisms 3 can further reinforce the stability of the vertical base 12.

[0031] The vertical base 12 is equipped with an explosion-proof membrane 4, which is used to release pressure after a transformer fault generates a large amount of high-temperature and high-pressure oil and gas that triggers a pressure impact.

[0032] Specifically, the explosion-proof membrane 4 can be installed on the upper side of the vertical base 12, that is, away from the horizontal base 11. The explosion-proof membrane 4 can relieve pressure after a transformer fault generates a large amount of high-temperature and high-pressure oil and gas, thus preventing an explosion and providing explosion-proof pressure relief. An explosion-proof connection hole 121 is provided on the upper side wall of the vertical base 12. An explosion-proof connecting cylinder 122 extends from the explosion-proof connection hole 121 on the side wall of the vertical base 12. The explosion-proof connecting cylinder 122 is arranged at an angle to the vertical base 12. The end of the explosion-proof connecting cylinder 122 away from the vertical base 12 (e.g., the end of the vertical base 12) is located away from the vertical base 12. Figure 1 The left end shown is provided with an explosion-proof connecting flange 123, which is detachably connected to the explosion-proof membrane 4. The explosion-proof connecting cylinder 122 can be arranged perpendicular to the vertical base 12 and extending away from the horizontal base 11, i.e. Figure 1 The diagram shows an extension to the left. The explosion-proof connecting flange 123 and the explosion-proof membrane 4 can be detachably connected via bolts, or connected in other ways; this embodiment does not impose any limitations on this connection. In this embodiment, the explosion-proof membrane 5 includes a metal explosion-proof membrane and an explosion-proof membrane protective layer covering the metal explosion-proof membrane. The metal explosion-proof membrane is detachably connected to the vertical base, and in particular, the metal explosion-proof membrane is detachably connected to the connecting flange 123. The explosion-proof membrane can be selected from different types or other combined explosion-proof structures according to actual needs, such as a cage-type explosion-proof membrane.

[0033] In this embodiment, the effective vent diameter of the explosion-proof membrane 4 is determined based on the transformer's voltage level. Specifically, when determining the effective vent diameter of the explosion-proof membrane based on the transformer's voltage level:

[0034] First, obtain the voltage rating ΔV of the transformer installed on the explosion-proof L-type riser.

[0035] A preset voltage level reference value matrix V is set, V (V1, V2, V3, V4, V5), wherein V1 is a first preset voltage level reference value, V2 is a second preset voltage level reference value, V3 is a third preset voltage level reference value, V4 is a fourth preset voltage level reference value, and V5 is a fifth preset voltage level reference value; wherein V1V2V3V4V5;

[0036] According to the relationship between the voltage level of the transformer installed in the explosion-proof L-shaped riser and each preset voltage level reference value, the effective discharge diameter of the explosion-proof membrane is determined.

[0037] It can be seen that, by selecting the effective discharge diameter of the explosion-proof membrane according to the relationship between the voltage level of the transformer installed in the explosion-proof L-shaped riser and each preset voltage level reference value, the effective discharge diameter of the explosion-proof membrane can be adjusted according to the voltage level of the transformer, so that an explosion-proof membrane with a suitable diameter can be selected and installed on the corresponding explosion-proof L-shaped riser, thereby improving the discharge effect of the explosion-proof L-shaped riser and the transformer.

[0038] In this embodiment, according to the relationship between the voltage level of the transformer installed in the explosion-proof L-shaped riser and each preset voltage level reference value, the effective discharge diameter of the explosion-proof membrane is determined, specifically:

[0039] When V1≤ΔV≤V2, the effective discharge diameter of the explosion-proof membrane is determined to be in the range [D1, D2];

[0040] When V3≤ΔV≤V4, the effective discharge diameter of the explosion-proof membrane is determined to be [D3, D3];

[0041] When ΔV≥V5, the effective discharge diameter of the explosion-proof membrane is determined to be [D5, D6]; wherein D1D2D3D4D5D6.

[0042] It can be seen that, when the voltage level of the transformer is larger, the effective discharge diameter of the explosion-proof membrane is increased, a large-diameter explosion-proof membrane is provided on the transformer with a large voltage level, and the transformer with a large voltage level can quickly spray out the internal oil and gas to avoid damage to the transformer.

[0043] In this embodiment, V1, V2, V3, V4, and V5 are 220kV, 300kV, 500kV, 750kV, and 1000kV, respectively, and D1, D2, D3, D4, D5, and D6 are 200mm, 250mm, 300mm, 350mm, 400mm, and 500mm, respectively.

[0044] The vertical seat body 12 is detachably connected with a cover plate 5, which is used to be opened for sampling or detection during operation and maintenance.

[0045] Specifically, the cover plate 5 is detachably arranged on the vertical seat body 12 to seal the vertical seat body 12 and can be opened for operation, especially for opening to take samples or detect maintenance during operation. The cover plate 5 can be arranged close to the horizontal seat body 11, and the cover plate 5 is arranged between the explosion-proof membrane 4 and the horizontal seat body 11, that is, the cover plate 5 is arranged below the explosion-proof membrane 4. The side wall of the vertical seat body 12 is provided with a cover plate connecting cylinder 125, and the cover plate 5 is detachably connected to the cover plate connecting cylinder 125, which is used to open to take samples or detect maintenance during operation. Further, the lower side of the side wall of the vertical seat body 12, especially below the explosion-proof connecting hole 121, is provided with a cover plate connecting hole 124, and the side wall of the vertical seat body 12 is provided with a cover plate connecting cylinder 125 at the cover plate connecting hole 123. The cover plate connecting cylinder 125 is arranged at an angle with the vertical seat body 12. The end of the cover plate connecting cylinder 125 away from the vertical seat body 12 (for example, the left end as shown) is provided with a cover plate connecting flange 126, which is detachably connected with the cover plate 5. The cover plate connecting cylinder 125 can be arranged perpendicular to the vertical seat body 12 and extend away from the horizontal seat body 11, that is, extend to the left as shown. Figure 1 The cover plate connecting flange 126 and the cover plate 5 can be detachably connected by bolts, or can be connected by other means, which are not limited in the embodiment. Figure 1

[0046] Referring back to Figures 1 to 3 , the corner reinforcing mechanism 2 can include at least two corner reinforcing plates 21. Each corner reinforcing plate 21 is arranged along the circumference of the L-shaped elevated seat body 1 at the corner connecting seam of the L-shaped elevated seat body 1, and each corner reinforcing plate 21 is connected with the horizontal seat body 11 and the vertical seat body 12 of the L-shaped elevated seat body 1, respectively.

[0047] ​Specifically, the corner reinforcing plate 21 is a plate-shaped structure, and there can be two or more. Two corner reinforcing plates 21 are respectively arranged at the inner corner position and the outer corner position of the corner of the L-shaped riser body 1, that is, one corner reinforcing plate 21 is arranged at the inner corner position and the outer corner position of the corner of the L-shaped riser body 1, and other corner reinforcing plates 21 can be arranged at intervals on the outer periphery of the L-shaped riser body 1, or a plurality of corner reinforcing plates 21 can be uniformly arranged along the circumference of the L-shaped riser body 1 at the corner of the L-shaped riser body 1, so as to further improve the structural strength of the L-shaped riser body 1. Each corner reinforcing plate 21 is connected with the horizontal seat body 11 and the vertical seat body 12 of the L-shaped riser body 1, which can further improve the connection stability of the horizontal seat body 11 and the vertical seat body 12 and reduce the moment of the connection of the horizontal seat body 11 and the vertical seat body 12. The corner reinforcing plate 21 can be connected to the L-shaped riser body 1 by welding or other means.

[0048] In this embodiment, the thickness of the corner reinforcing plate 21 is greater than or equal to the wall thickness of the L-shaped riser body 1, and the thickness of the corner reinforcing plate 21 can be determined based on the wall thickness of the L-shaped riser body 1. Based on the wall thickness of the L-shaped riser body 1, the thickness of the corner reinforcing plate 21 is determined as follows:

[0049] A preset riser wall thickness reference value matrix b is set, and b (b1, b2, b3) is set, where b1 is a first preset riser wall thickness reference value, b2 is a second preset riser wall thickness reference value, and b3 is a third preset riser wall thickness reference value; wherein b1 < b2 < b3;

[0050] According to the relationship between the wall thickness Δb of the L-shaped riser body and each preset riser wall thickness reference value, the thickness h of the corner reinforcing plate is determined.

[0051] It can be seen that by selecting the thickness of the corner reinforcing plate according to the relationship between the wall thickness of the L-shaped riser body and each preset riser wall thickness reference value, the thickness of the corner reinforcing plate can be adjusted according to the wall thickness of the L-shaped riser body, so that a corner reinforcing plate with a suitable thickness can be selected and installed at the corner of the L-shaped riser body, thereby further improving the structural strength of the L-shaped riser body.

[0052] Wherein, according to the relationship between the wall thickness of the L-shaped riser body and each preset riser wall thickness reference value, the thickness h of the corner reinforcing plate is determined, specifically:

[0053] When Δb < b1, the first preset thickness h1 is selected as the thickness of the corner reinforcing plate;

[0054] When b1 ≤ Δb < b2, the second preset thickness h2 is selected as the thickness of the corner reinforcing plate;

[0055] When b2≤Δb<b3, a third preset thickness h3 is selected as the thickness of the corner reinforcing plate;

[0056] When Δb≥b3, a fourth preset thickness h4 is selected as the thickness of the corner reinforcing plate; wherein h1

[0057] It can be seen that when the wall thickness of the L-shaped riser body is thicker, the thickness of the corner reinforcing plate is increased, the corner reinforcing plate with thicker thickness is installed on the L-shaped riser body with thicker wall thickness, the connection stability between the horizontal seat body and the vertical seat body is further ensured, the deformation damage at the corner of the L-shaped riser body is avoided, the sealing element is protected, and the deformation damage of the sealing element is avoided.

[0058] In an embodiment of the wall surface reinforcing mechanism in the embodiment, as shown in Figures 1 to 3 , the wall surface reinforcing mechanism 3 can be a wall surface reinforcing plate structure. Specifically, one end (such as the left end shown in Figure 3 ) of the wall surface reinforcing mechanism 3 is provided with an inner concave circular groove 31 matched with the outer wall of the vertical seat body 12, which is used to be connected on the outer wall of the vertical seat body 12 to improve the connection stability and further improve the structural strength of the vertical seat body 12. In the embodiment, the thickness of the wall surface reinforcing plate structure 3 is greater than or equal to the wall thickness of the L-shaped riser body 1, and the thickness of the wall surface reinforcing plate structure 3 can be determined based on the wall thickness of the L-shaped riser body 1. Wherein, the thickness of the wall surface reinforcing plate structure 3 is less than.

[0059] In another embodiment of the wall surface reinforcing mechanism in the embodiment, as shown in Figure 4 , the wall surface reinforcing mechanism 3 can include a connecting plate 32, a connecting ring 33 and a connecting rod 34; wherein the connecting plate 32 is used to be fixed on the transformer oil tank wall 6; the connecting ring 33 is sleeved on the outer periphery of the vertical seat body 12 and connected with the vertical seat body 12; and the two ends (such as the left end shown in Figure 4The left and right ends (shown) are respectively connected to the connecting plate 32 and the connecting ring 33. Specifically, the connecting plate 32 can be welded to the transformer tank wall 6, or it can be detachably connected to the transformer tank wall 6 via flanges or other means. The connecting ring 33 can be a clamp to accommodate vertical seats 12 with different outer diameters for fixed connection. To accommodate different riser seats and different connection methods, preferably, both ends of the connecting rod 34 are hinged to the connecting plate 32 and the connecting ring 33 respectively, so as to accommodate different distances between the vertical seat 12 and the transformer tank wall 6. In particular, the connecting rod 34 can be arranged at an angle, for example, from the end connected to the connecting plate 32 to the end connected to the connecting rod 34, which is arranged at an angle downwards to provide tension to the connecting ring 33, and thus to the vertical seat 12. This can further enhance the stability of the vertical seat 12 and prevent the connection support points of the L-shaped riser body 1 from being concentrated at the connection between the horizontal seat 11 and the transformer tank wall 6.

[0060] In this embodiment, the connecting rod 34 can be a telescopic rod structure, such as... Figure 5 As shown, the connecting rod 34 may include: a fixed section 341 and at least one sliding section 342; wherein, the sliding sections 342 are all disposed on one side of the fixed section 341 (e.g., Figure 5 (As shown on the right), the first-stage sliding segment 342 is fitted inside the fixed segment 341, and its relative sliding with respect to the fixed segment 341 is adjusted to regulate the total length of the sliding segment 342 and the fixed segment 341. Any two adjacent sliding segments 342 can be slidably connected to each other to adjust the total length of the sliding segment 342. Specifically, to increase the range and stability of the telescopic rod structure's length adjustment, those skilled in the art will understand that there can be two or more sliding segments 342. Both the fixed segment 341 and the sliding segment 342 are provided with multiple corresponding locking holes 343. The fixed segment 341 and the first-stage sliding segment 342 are connected by locking members 344 passing through the locking holes 343, and / or, any two adjacent sliding segments 342 are connected by locking members 344 passing through the locking holes 343. The fixed section 341 and both ends of the sliding section 342 are provided with several locking holes 343 along their length. The first-stage sliding section 342 and the fixed section 341 are locked together by locking members 344 on different locking holes 343 on the fixed section 341 and different locking holes 343 on the sliding section 342, so as to adjust the total length of the telescopic rod structure. Of course, the sliding sections 342 can also be adjusted in this way. Alternatively, the sliding end of the fixed section 341 is provided with one locking hole 343, one end of the sliding section 342 is provided with one locking hole 343, and the other end is provided with multiple locking holes 343. The locking holes 343 on the sliding end of the fixed section 341 and the ends of the sliding section 342 with multiple locking holes 343 are aligned to adjust the length.

[0061] In summary, the explosion-proof L-shaped lifting seat provided by the embodiment increases the structural strength of the explosion-proof L-shaped lifting seat through the corner reinforcing mechanism 2 at the corner connecting seam of the L-shaped lifting seat body 1 and the wall reinforcing mechanism 3 between the vertical seat body 12 and the transformer oil tank wall 6, avoids excessive deformation or even damage of the L-shaped lifting seat body 1, and avoids damage to the seal of the L-shaped lifting seat body 1, thereby playing a protective role on the explosion-proof L-shaped lifting seat and effectively solving the problem that the existing L-shaped lifting seat is easily deformed or even damaged and the corner seal is easily deformed and aged to cause electrical failure under the influence of factors such as temperature change and vibration during the operation of the transformer.

[0062] Further, the explosion-proof membrane 4 is further arranged on the L-shaped lifting seat body 1, and when a large amount of high-temperature and high-pressure oil gas excitation pressure impact is formed in the electric arc discharge moment of the transformer failure, the explosion-proof membrane can play a pressure relief role to avoid safety hazards.

[0063] It should be noted that in the description of the present application, the terms indicating the direction or positional relationship of "upper", "lower", "left", "right", "inner", "outer" and the like are based on the direction or positional relationship shown in the drawings, which is only for the convenience of description, and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0064] In addition, it should be further pointed out that in the description of the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication between the two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0065] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application also intends to include these modifications and variations.

Claims

1. An explosion-proof L-type raised seat, characterized by, The L-shaped elevated seat body; The corner reinforcing mechanism is arranged at the corner connecting seam of the L-shaped elevated seat body, and the corner reinforcing mechanism is connected with the horizontal seat body and the vertical seat body of the L-shaped elevated seat body, respectively. The wall surface reinforcing mechanism is connected with the vertical seat body of the L-shaped elevated seat body at one end, and the other end is used for connecting the oil tank wall of the transformer connected with the L-shaped elevated seat body. The corner reinforcing mechanism comprises at least two corner reinforcing plates; wherein 2. The explosion-proof L-elevated base according to claim 1, characterized in that, Each of the corner reinforcing plates is arranged at the corner connecting seam of the L-shaped elevated seat body along the circumference of the L-shaped elevated seat body, and each of the corner reinforcing plates is connected with the horizontal seat body and the vertical seat body of the L-shaped elevated seat body, respectively.

3. The explosion-proof L-shaped elevated seat according to claim 2, wherein The corner reinforcing plates are arranged at the inner corner position and the outer corner position of the L-shaped elevated seat body, respectively.

4. The explosion-proof L-shaped elevated seat according to claim 2, wherein The thickness of the corner reinforcing plate is greater than or equal to the wall thickness of the L-shaped elevated seat body.

5. The explosion-proof L-shaped elevated seat according to any one of claims 1 to 4, wherein An explosion-proof membrane is arranged on the vertical seat body, and is used for pressure relief after a large amount of high-temperature and high-pressure oil gas is excited by pressure impact due to transformer failure. The explosion-proof membrane comprises:

6. The explosion-proof L-elevated base according to claim 5, characterized in that A metal explosion-proof membrane is connected with the vertical seat body in a detachable manner; An explosion-proof membrane protective layer is arranged on the metal explosion-proof membrane.

7. The explosion-proof L-shaped elevated seat according to claim 5, wherein An explosion-proof connecting hole is arranged on the side wall of the vertical seat body, and an explosion-proof connecting cylinder is arranged on the side wall of the vertical seat body at the explosion-proof connecting hole, and the explosion-proof connecting cylinder is arranged at an angle with the vertical seat body; An explosion-proof connecting flange is arranged on the end of the explosion-proof connecting cylinder away from the vertical seat body, and the explosion-proof connecting flange is detachably connected with the explosion-proof membrane.

8. The explosion-proof L-shaped elevated seat according to any one of claims 1 to 4, wherein A cover plate connecting cylinder is arranged on the side wall of the vertical seat body, and a cover plate is detachably connected with the cover plate connecting cylinder, and the cover plate is used for opening for sampling or detection during maintenance.

9. The explosion-proof L-shaped elevated seat according to claim 8, wherein The cover plate is arranged close to the horizontal seat body, and the cover plate is arranged between the explosion-proof membrane on the vertical seat body and the horizontal seat body.

10. The explosion-proof L-shaped elevated seat according to any one of claims 1 to 4, wherein The wall surface reinforcing mechanism is a wall surface reinforcing plate structure, one end of the wall surface reinforcing plate structure is provided with an inner concave circular arc groove matched with the outer wall of the vertical seat body, and the wall surface reinforcing plate structure is connected with the outer wall of the vertical seat body. ​

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