Open caisson type main transformer accident oil pool

Abstract

The utility model relates to the technical field of transformer accident oil pools, in particular to an open caisson type main transformer accident oil pool. Comprising a split pouring type pool body, a flow guide pipeline and a sealing piece, the split pouring type pool body is poured in an open caisson type construction mode. The flow guide pipeline is communicated with the interior of the split pouring type pool body and used for guiding oil in the emergency transformer into the split pouring type pool body or outputting liquid from the split pouring type pool body. The sealing pieces are arranged at the connecting position of the flow guide pipeline and the split pouring type pool body and the pouring connection position of the split pouring type pool body and used for sealing gaps at the connecting points. The main transformer accident oil pool is easy to construct and good in sealing performance, and the using effect is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to transformer accident oil pool technical field especially relates to a caisson type main transformer accident oil pool. BACKGROUND

[0002] The transformer accident oil pool in the transformer substation is an important component of the transformer, and its role is to prevent the main transformer from catching fire or exploding in an accident, isolate and handle the oil in the accident transformer, collect the gas and oil generated inside the transformer, protect the equipment and personnel around the transformer, and reduce maintenance and replacement costs. At present, in the new construction, expansion and technical transformation projects of the transformer substation, the surrounding environment of the proposed accident oil pool area is complex and diverse, such as surrounding roads, main transformer foundation, GIS foundation, and structure foundation. The distribution of existing oil discharge, water supply and drainage pipelines is dense, making the construction site small and crowded, and the construction operation surface is tense.

[0003] Generally, the buried depth of the accident oil pool is about 6-7m, and the foundation pit needs to be supported during excavation. Common support methods include steel sheet piles, soil nailing walls, and slopes. Based on previous engineering construction experience, in the expansion and technical transformation projects with limited site, the steel sheet pile is not suitable due to the collision of the lead wire of the outgoing structure and the main transformer structure with the piling machine arm, the piling equipment has no construction operation surface, and the access cost is high. When using soil nailing wall support, the soil nailing length needs to extend into the surrounding structure foundation to meet the calculation requirements, which does not have construction conditions. When using slope, under the condition of meeting the slope rate required by the specification, some projects need to destroy part of the main transformer transportation road or fire ring, which causes the obstruction of the construction transportation and maintenance access in the station, increases the risk and safety hazard of operation and maintenance, and the construction operation surface and slope rate of the actual site are small, which aggravates the construction risk and the operation safety of the surrounding structures. Therefore, the problem of foundation pit support of the main transformer accident oil pool under the condition of limited site needs to be solved urgently.

[0004] The above content is only used to assist in understanding the technical scheme of the utility model, and does not represent the recognition of the above content as the closest prior art. Utility model content

[0005] The utility model solves the technical problem of providing a caisson type main transformer accident oil pool, which is easy to construct, has good sealing performance, and improves the use effect.

[0006] To achieve the object, the technical scheme of the utility model is as follows: a sunk well type main transformer accident oil pool, comprising: split pouring type pool body, flow guide pipe and sealing element; the split pouring type pool body is poured by adopting sunk well type construction mode; the flow guide pipe is communicated with the split pouring type pool body inside, is used for guiding the oil in the accident transformer into the split pouring type pool body or outputting liquid from the split pouring type pool body; the sealing element is arranged at the joint of the flow guide pipe and the split pouring type pool body and the pouring joint of the split pouring type pool body, is used for sealing the gap at the joint.

[0007] Preferably, the split pouring type pool body comprises bottom pool body, upper pool body, bottom plate and top cover plate; the bottom of the bottom pool body is connected with the bottom plate by cast-in-place mode; the bottom end of the upper pool body is connected with the top end of the bottom pool body by cast-in-place mode; the top cover plate is connected with the top end of the upper pool body by cast-in-place mode; the bottom pool body, the upper pool body, the bottom plate and the top cover plate jointly enclose the split pouring type pool body.

[0008] Preferably, the sealing element comprises annular water stop steel plate; the annular water stop steel plate is arranged at the joint of the bottom pool body and the upper pool body, and the upper and lower ends of the annular water stop steel plate are embedded in the bottom pool body and the upper pool body respectively by pouring.

[0009] Preferably, the sealing element comprises first rubber sleeve and second sleeve; the flow guide pipe comprises first flow guide pipe and second flow guide pipe; both sides of the upper pool body are provided with through holes; one end of the first flow guide pipe is communicated with the transformer, and the other end is matched with the through hole on one side of the upper pool body in plug-in mode, and is used for guiding the oil in the accident transformer into the split pouring type pool body; one end of the second flow guide pipe is arranged inside the split pouring type pool body and is communicated with the bottom of the bottom pool body, and the other end of the second flow guide pipe passes through the through hole on the other side of the upper pool body and is used for guiding the liquid in the split pouring type pool body out; the first rubber sleeve is located in the through hole on one side of the upper pool body and is sleeved on the first flow guide pipe; the second sleeve is located in the through hole on the other side of the upper pool body and is sleeved on the second flow guide pipe.

[0010] Preferably, it further comprises air pipe; the air pipe is communicated with the inside of the closed pool body through the top cover plate.

[0011] Preferably, the top cover plate is provided with access hole; the top end of the access hole is provided with cover plate, and the bottom end of the access hole is provided with ladder, and the ladder is fixed on the inner wall of the closed pool body.

[0012] Preferably, the joint of the bottom plate and the bottom pool body is provided with T-shaped ring groove; the bottom surface of the bottom plate is connected with the groove wall of the T-shaped ring groove; the side surface of the bottom plate is integrally formed with the side wall of the bottom pool body by planting steel bar and pouring connection.

[0013] Preferably, the fixed support is further included; the bottom plate is provided with a recess; the second flow guide pipe is provided with a water suction horn pipe at the end inside the split-pouring pool body; the fixed support is installed in the recess and connected with the water suction horn pipe.

[0014] Preferably, the bottom end of the bottom pool body is provided with a blade foot; the bottom surface of the blade foot is coincided with the center line of the sand cushion layer and the sleeper during the caisson construction.

[0015] Preferably, the high-pressure grouting layer is further included; the high-pressure grouting layer is filled between the outer wall of the split-pouring pool body and the soil layer in which the split-pouring pool body is buried.

[0016] The beneficial effects of the utility model are shown in:

[0017] The utility model discloses a caisson type main transformer emergency oil pool, can build by caisson construction mode, need not excavate foundation pit and set up foundation pit support in advance, which not only reduces the construction cost of the main transformer emergency oil pool, improves the construction efficiency, but also provides better sealing effect by the split-pouring connection mode, reduces the leakage phenomenon and improves the use effect of the main transformer emergency oil pool. BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1 It is the structure schematic view of the utility model;

[0019] Fig. 2 It is the structure plan view of the utility model;

[0020] Fig. 3 It is the construction schematic view of the utility model.

[0021] MARK NUMBER EXPLANATION:

[0022] A, sleeper;B, sand cushion layer;10, bottom pool body;11, blade foot;12, T-shaped ring groove;20, upper pool body;31, first flow guide pipe;32, second flow guide pipe;321, water suction horn pipe;322, fixed support;33, first rubber sleeve;34, second sleeve;40, bottom plate;41, recess;50, cover plate;51, access hole;61, ladder;70, top cover plate;80, high-pressure grouting layer;90, annular water stop steel plate. DETAILED DESCRIPTION

[0023] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described, obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. In the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. Based on the embodiments in the present application, all the other embodiments obtained by the person skilled in the art without creative labor are within the protection scope of the present application.

[0024] Embodiment

[0025] Referring to Figs. 1-3 as shown:

[0026] The utility model provides a kind of sinking well type main transformer accident oil pool, comprising: split-pouring type pool body, flow guide pipe and sealing element.Split-pouring type pool body is poured using sinking well type construction mode, flow guide pipe is communicated with split-pouring type pool body inside, for the oil in accident transformer is guided into split-pouring type pool body or from split-pouring type pool body output liquid.Sealing element is arranged at the connecting place of flow guide pipe and split-pouring type pool body and the pouring link-up place of split-pouring type pool body, for the gap at connecting point is sealed.

[0027] Split-pouring type pool body is mainly composed of bottom pool body 10, upper pool body 20, bottom plate 40 and top cover plate 70.

[0028] The bottom of bottom pool body 10 is connected with bottom plate 40 using cast-in-place mode.The bottom end of upper pool body 20 is connected with the top end of bottom pool body 10 using cast-in-place mode, and the top cover plate 70 is connected with the top end of upper pool body 20 using cast-in-place mode.Bottom pool body 10, upper pool body 20, bottom plate 40 and top cover plate 70 jointly enclose split-pouring type pool body.

[0029] For the split-pouring type pool body of larger size, a plurality of middle pool bodies are also provided, which are arranged between the bottom pool body 10 and the upper pool body 20, or the upper pool body 20 is arranged in at least three sections and is sequentially spliced and poured in the vertical direction.

[0030] The sealing element includes an annular water-stop steel plate 90, which is arranged at the abutting joint of the bottom pool body 10 and the upper pool body 20, and the upper and lower ends of the annular water-stop steel plate 90 are embedded in the bottom pool body 10 and the upper pool body 20 respectively by pouring.The cross section of the annular water-stop steel plate 90 is arranged in an arc shape, and the arc surface of the arc shape is opposite to the direction inside the split-pouring type pool body, for preventing the liquid inside and outside the split-pouring type pool body from leaking along the pouring connection of the bottom pool body 10 and the upper pool body 20.

[0031] The sealing member further comprises a first rubber sleeve 33 and a second sleeve 34. The flow guide pipe comprises a first flow guide pipe 31 and a second flow guide pipe 32.

[0032] During the pouring, a through hole is reserved on each side of the upper pool body 20. One end of the first flow guide pipe 31 is in communication with the transformer, and the other end is in plug-in cooperation with the through hole on one side of the upper pool body 20, which is used to guide the oil in the transformer into the split-pouring pool body.

[0033] One end of the second flow guide pipe 32 is arranged inside the split-pouring pool body and is in communication with the bottom of the bottom pool body 10. The other end of the second flow guide pipe 32 passes through the through hole on the other side of the upper pool body 20, which is used to guide the liquid in the split-pouring pool body out. The first rubber sleeve 33 is located in the through hole on one side of the upper pool body 20 and is sleeved on the first flow guide pipe 31, which is used to seal the gap between the second flow guide pipe 32 and the through hole of the upper pool body 20. The second sleeve 34 is located in the through hole on the other side of the upper pool body 20 and is sleeved on the second flow guide pipe 32, which is used to seal the gap between the second sleeve 34 and the through hole of the upper pool body 20.

[0034] Further comprising an air pipe 71 which is in communication with the inside of the closed pool body through the top cover plate 70, which is used to maintain the atmospheric pressure in the split-pouring pool body consistent with the outside.

[0035] The top end of the access hole 51 is provided with a cover plate 50, and the bottom end of the access hole 51 is provided with a ladder 61 which is fixed on the inner wall of the closed pool body, which is convenient for the operator to enter and exit the split-pouring pool body.

[0036] The connection between the bottom plate 40 and the bottom pool body 10 is provided with a T-shaped ring groove 12. The bottom surface of the bottom plate 40 is connected with the groove wall of the T-shaped ring groove 12, thereby increasing the contact area between the bottom plate 40 and the bottom pool body 10, facilitating pouring and forming an integrated sealing structure. The side surface of the bottom plate 40 is connected with the side wall of the bottom pool body 10 through the embedded steel bar to form an integrated structure, preventing cracking due to settlement and increasing the carrying capacity of the bottom plate 40.

[0037] Further comprising a fixing bracket 322; the bottom plate 40 is provided with a groove 41. The end of the second flow guide pipe 32 arranged inside the split-pouring pool body is provided with a water suction horn pipe 321, which expands the oil intake amount of the second flow guide pipe 32 when delivering oil to the split-pouring pool body. The fixing bracket 322 is installed in the groove 41 and connected with the water suction horn pipe 321.

[0038] By setting the groove 41, the water suction horn pipe 321 and the fixing bracket 322, it is ensured that the oil in the split-pouring pool body can be guided out by the second flow guide pipe 32 to the maximum extent.

[0039] The bottom end of the bottom pool body 10 is provided with a blade foot 11, and the bottom surface of the blade foot 11 coincides with the center line of the sand cushion B and the sleeper A during the caisson construction.

[0040] During the specific construction, a small foundation pit of about 1m is excavated in advance from the ground surface at the proposed location, which plays the role of clearing the surface and uniforming the soil quality. A sand cushion layer of about 0.5m thick is laid in the small foundation pit, so as to ensure that the bottom of the accident oil pool is at the same level and to achieve the purpose of reducing uneven settlement. The sleepers A are symmetrically laid on the sand cushion B, and the sinking time of the first section of the caisson can be controlled as needed; the center lines of the bottom surface of the blade foot 11, the sand cushion B and the sleeper A are coincided, and the sand cushion B is excavated and the sleepers A are symmetrically extracted before the sinking of the first section, so as to ensure the symmetry and stability of the sinking process of the pool wall of the split-pouring pool body. During the specific construction, due to the arrangement of the blade foot 11, it is convenient for the operator to excavate downward and conduct the caisson construction.

[0041] The high-pressure grouting layer 80 is filled between the outer wall of the split-pouring pool body and the soil layer in which the split-pouring pool body is buried. The sealing property and the stability of use of the split-pouring pool body are increased through the high-pressure grouting layer 80.

[0042] The above is only a preferred embodiment of the present application, and is not used to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A caisson type main transformer emergency oil sump, characterized in that, The utility model relates to a kind of sealed pool body for transformer, including: Split pouring type pool body, flow guide pipe and sealing element;The split pouring type pool body is poured using caisson type construction mode; The flow guide pipe is communicated with the inside of split pouring type pool body, for guiding oil in accident transformer into split pouring type pool body or outputting liquid from split pouring type pool body; The sealing element is arranged at the connecting place of flow guide pipe and split pouring type pool body and the pouring joint of split pouring type pool body, for sealing gap at connecting point.

2. A caisson type main transformer emergency oil sump according to claim 1, characterized in that, The split pouring type pool body includes bottom pool body (10), upper pool body (20), bottom plate (40) and top cover plate (70);The bottom of bottom pool body (10) is connected with bottom plate (40) using cast-in-place mode;The bottom end of upper pool body (20) is connected with the top end of bottom pool body (10) using cast-in-place mode;The top cover plate (70) is connected with the top end of upper pool body (20) using cast-in-place mode;The bottom pool body (10), upper pool body (20), bottom plate (40) and top cover plate (70) jointly enclose split pouring type pool body.

3. A caisson type main transformer emergency oil sump according to claim 2, characterized in that, The sealing element includes annular water-stop steel plate (90);The annular water-stop steel plate (90) is arranged at the joint of bottom pool body (10) and upper pool body (20), and the upper and lower ends of annular water-stop steel plate (90) are embedded in bottom pool body (10) and upper pool body (20) respectively using pouring mode.

4. A caisson type main transformer emergency oil sump according to claim 3, characterized in that, The sealing element includes first rubber sleeve (33) and second sleeve (34);The flow guide pipe includes first flow guide pipe (31) and second flow guide pipe (32);Both sides of upper pool body (20) are provided with through hole;One end of first flow guide pipe (31) is communicated with transformer, and the other end is matched with the through hole on one side of upper pool body (20) to form plug-in cooperation, for guiding oil in accident transformer into split pouring type pool body;One end of second flow guide pipe (32) is arranged inside split pouring type pool body and communicated with the bottom of bottom pool body (10), and the other end of second flow guide pipe (32) passes through the through hole on the other side of upper pool body (20), for guiding liquid in split pouring type pool body out;The first rubber sleeve (33) is located in the through hole on one side of upper pool body (20) and sleeved on first flow guide pipe (31);The second sleeve (34) is located in the through hole on the other side of upper pool body (20) and sleeved on second flow guide pipe (32).

5. A sunk well type main transformer emergency oil sump according to claim 3 or 4, characterized in that, It also includes air pipe (71);The air pipe (71) is communicated with the inside of closed pool body through top cover plate (70).

6. A caisson type main transformer emergency oil sump as claimed in claim 4 wherein, The top cover plate (70) is provided with access hole (51);The top end of access hole (51) is provided with cover plate (50), and the bottom end of access hole (51) is provided with ladder (61), and ladder (61) is fixed on the inner wall of closed pool body.

7. A caisson type main transformer emergency oil sump as claimed in claim 6 wherein, The connecting place of bottom plate (40) and bottom pool body (10) is provided with T-shaped ring groove (12);The bottom surface of bottom plate (40) is connected with the groove wall of T-shaped ring groove (12);The side surface of bottom plate (40) is integrally formed through the embedded bar and the side wall pouring connection of bottom pool body (10).

8. A caisson type main transformer emergency oil sump according to claim 7, characterized in that, It also includes a fixed support (322); the bottom plate (40) is provided with a groove (41); the second flow guide pipe (32) is provided with a water suction horn pipe (321) at the end inside the split pouring type pool body; the fixed support (322) is installed in the groove (41) and connected with the water suction horn pipe (321).

9. A sunk well type main transformer emergency oil sump as claimed in claim 2 wherein, The bottom end of the bottom pool body (10) is provided with a blade foot (11); the bottom surface of the blade foot (11) coincides with the center line of the sand cushion layer (B) and the sleeper (A) during the caisson construction.

10. A caisson type main transformer emergency oil sump as claimed in claim 9 wherein, It also includes a high-pressure grouting layer (80); the high-pressure grouting layer (80) is filled between the outer wall of the split pouring type pool body and the soil layer in which the split pouring type pool body is buried.

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